技术领域Technical field
本申请涉及投影显示技术领域，尤其涉及一种投影光机及电子设备。The present application relates to the field of projection display technology, and in particular to a projection light machine and electronic equipment.
背景技术Background technique
增强现实(augmentedreality，AR)显示技术是一种实时采集现实世界信息，并将虚拟信息、图像等于现实世界相结合的显示技术。AR设备的光学显示系统通常包括微型光机和光学组合器组成，其中，光机为投影光机，用于产生图像并将图像投射到光学组合器，光学组合器用于将光机产生的图像发射到用户眼睛中。其中，光机的体积对AR设备整体体积影响较大，为了减小光机整体的体积，光机中不同颜色的发光面板分别设置在合色棱镜的周围，合色棱镜中间设置二向色镀膜，使得不同颜色的光线通过合色棱镜进入光机镜头，然而二向色镀膜受入射光线的角度影响较大，容易在光机中出现杂散光。Augmented reality (AR) display technology is a display technology that collects real-world information in real time and combines virtual information and images with the real world. The optical display system of AR equipment usually consists of a micro-optical engine and an optical combiner. The optical engine is a projection optical engine, which is used to generate images and project the images to the optical combiner. The optical combiner is used to emit the image generated by the optical engine. into the user’s eyes. Among them, the volume of the optical machine has a greater impact on the overall volume of the AR equipment. In order to reduce the overall volume of the optical machine, the light-emitting panels of different colors in the optical machine are arranged around the color combination prism, and a dichroic coating is set in the middle of the color combination prism. , allowing light of different colors to enter the optical machine lens through the color combination prism. However, the dichroic coating is greatly affected by the angle of the incident light, and stray light is prone to appear in the optical machine.
发明内容Contents of the invention
本申请实施例所要解决的技术问题在于，提供一种能够减少杂散光的投影光机及电子设备。The technical problem to be solved by the embodiments of the present application is to provide a projection light machine and electronic equipment that can reduce stray light.
第一方面，本申请实施例提供一种投影光机，其包括多个发光单元、合光装置及与多个发光单元一一对应的多个滤光件；多个发光单元分别用于发出不同颜色的光束；合光装置包括多个入射面，每个入射面与对应的一个发光单元相对设置，合光装置用于将多个发光单元所发射的光束合路后出射；每个滤光件位于对应的发光单元与对应的入射面之间，滤光件用于透过对应的发光单元发射的光束，并吸收其他发光单元发射的光束。In a first aspect, embodiments of the present application provide a projector, which includes a plurality of light-emitting units, a light combining device, and a plurality of filters corresponding to the plurality of light-emitting units; the plurality of light-emitting units are respectively used to emit different Colored light beams; the light combining device includes a plurality of incident surfaces, each incident surface is arranged opposite to a corresponding light-emitting unit, and the light combining device is used to combine the light beams emitted by the multiple light-emitting units and then emit them; each filter element Located between the corresponding light-emitting unit and the corresponding incident surface, the filter is used to transmit the light beam emitted by the corresponding light-emitting unit and absorb the light beam emitted by other light-emitting units.
每个发光单元在合光装置内部容易出现折射，而照射到其他发光单元处导致投影光机出现杂散光，通过在每个发光单元和对应的入射面之间设置滤光件，与发光单元对应的滤光件能够吸收其他发光单元照射到该发光单元处的光束，减少投影光机中的杂散光，且与发光单元对应的滤光件能够透过发光单元发射的光束，以实现投影光机的全彩显示。Each light-emitting unit is prone to refraction within the light combining device, and the irradiation of other light-emitting units causes stray light to appear in the projection light machine. By setting a filter between each light-emitting unit and the corresponding incident surface, it corresponds to the light-emitting unit. The filter can absorb the light beams irradiated from other light-emitting units to the light-emitting unit, reducing stray light in the projector, and the filter corresponding to the light-emitting unit can pass the light beam emitted by the light-emitting unit to realize the projector. full color display.
结合第一方面，在一种可能的实现方式中，滤光件贴合在对应的入射面上。Combined with the first aspect, in a possible implementation manner, the optical filter is attached to the corresponding incident surface.
在本种可能的实现方式中，将滤光件固定在合光装置的入射面上，并充分利用发光单元与入射面之间的空间，提高空间利用率。In this possible implementation, the filter is fixed on the incident surface of the light combining device, and the space between the light-emitting unit and the incident surface is fully utilized to improve space utilization.
结合第一方面，在一种可能的实现方式中，发光单元包括基板和颜色像素，颜色像素设置在基板上，颜色像素包括主动发光件；滤光件盖合在对应的发光单元的基板上，主动发光件位于基板和滤光片之间。In connection with the first aspect, in a possible implementation, the light-emitting unit includes a substrate and color pixels, the color pixels are arranged on the substrate, the color pixels include active light-emitting parts; the filter is covered on the substrate of the corresponding light-emitting unit, The active light emitting element is located between the substrate and the filter.
在本种可能的实现方式中，滤光件替换发光单元的盖板，将滤光件直接封装在发光单元的基板上，可以缩小发光单元和入射面之间的距离，减小了投影光机整体的体积，减少组装工序。In this possible implementation, the filter replaces the cover of the light-emitting unit, and the filter is directly packaged on the substrate of the light-emitting unit, which can reduce the distance between the light-emitting unit and the incident surface and reduce the cost of the projector. The overall volume reduces the assembly process.
结合第一方面，在一种可能的实现方式中，沿滤光件和发光单元的排列方向上，滤光件相背的两个表面均为平面。In conjunction with the first aspect, in a possible implementation manner, along the arrangement direction of the filter and the light-emitting unit, the two opposite surfaces of the filter are both planes.
在本种可能的实现方式中，滤光件相背的两个表面均设置为平面，减少发光单元发射的光束经滤光件的平面入射、再从滤光件另一侧的平面后入射到合光装置的过程中的漫反射，从而有效减少投影光机中的杂散光。In this possible implementation, the two opposite surfaces of the filter are both set as planes to reduce the light beam emitted by the light-emitting unit from being incident on the plane of the filter and then incident on the plane from the other side of the filter. Diffuse reflection in the process of light combining device, thereby effectively reducing stray light in the projection light machine.
结合第一方面，在一种可能的实现方式中，多个发光单元包括第一发光面板、第二发光面板和第三发光面板，第一发光面板、第二发光面板和第三发光面板所发射的光束的颜色各不相同，多个滤光件包括第一滤光片、第二滤光片和第三滤光片，多个入射面包括第一入射面、第二入射面及第三入射面；第一滤光片设置于第一发光面板和第一入射面之间；第一滤光片用于透过第一发光面板发射的光束并吸收第二发光面板和第三发光面板所发射的光束；第二滤光片设置于第二发光面板和第二入射面之间，第二滤光片用于透过第二发光面板发射的光束并吸收第一发光面板和第三发光面板所发射的光束；第三滤光片设置于第三发光面板和第三入射面之间，第三滤光片用于透过第三发光面板发射的光束并吸收第一发光面板和第二发光面板所发射的光束。In conjunction with the first aspect, in a possible implementation, the plurality of light-emitting units include a first light-emitting panel, a second light-emitting panel, and a third light-emitting panel, and the first light-emitting panel, the second light-emitting panel, and the third light-emitting panel emit The colors of the light beams are different. The plurality of filters include a first filter, a second filter and a third filter. The plurality of incident surfaces include a first incident surface, a second incident surface and a third incident surface. surface; the first filter is disposed between the first light-emitting panel and the first incident surface; the first filter is used to transmit the light beam emitted by the first light-emitting panel and absorb the light beam emitted by the second light-emitting panel and the third light-emitting panel. the light beam; the second filter is disposed between the second light-emitting panel and the second incident surface, and the second filter is used to transmit the light beam emitted by the second light-emitting panel and absorb the light beam emitted by the first light-emitting panel and the third light-emitting panel. The emitted light beam; the third optical filter is disposed between the third light-emitting panel and the third incident surface, and the third optical filter is used to transmit the light beam emitted by the third light-emitting panel and absorb the first light-emitting panel and the second light-emitting panel The beam emitted.
在本种可能的实现方式中，第一滤光片能够透过第一发光面板发射的光束，第二滤光片能够透过第二发光面板发射的光束，第三滤光片能够透过第三发光面板发射的光束，以实现全彩显示；其中，第一滤光片还能够吸收第二发光面板发射的并经合光装置折射后照射到第一入射面处的光束、以及第三发光面板发射的光束经合光装置折射后照射到第一入射面处的光束，减小第二发光面板和第三发光面板发射的光束形成杂散光的可能性，减少了投影光机中的杂散光；类似地，第二滤光片还能够吸收第一发光面板发射的并经合光装置折射后照射到第二入射面处的光束、以及第三发光面板发射的光束经合光装置折射后照射到第二入射面处的光束，减小第一发光面板和第三发光面板发射的光束形成杂散光的可能性，减少了投影光机中的杂散光；第三滤光片还能够吸收第一发光面板发射的并经合光装置折射后照射到第三入射面处的光束、以及第二发光面板发射的并经合光装置折射后照射到第三入射面处的光束，减小第一发光面板、以及第二发光面板发射的光束形成杂散光的可能性，减少了投影光机中的杂散光。In this possible implementation, the first optical filter can transmit the light beam emitted by the first light-emitting panel, the second optical filter can transmit the light beam emitted by the second light-emitting panel, and the third optical filter can transmit the light beam emitted by the second light-emitting panel. The first light filter can also absorb the light beam emitted by the second light-emitting panel and refracted by the light combining device to illuminate the first incident surface, and the third light-emitting The light beam emitted by the panel is refracted by the light combining device and irradiates the light beam at the first incident surface, reducing the possibility that the light beam emitted by the second light-emitting panel and the third light-emitting panel forms stray light, and reducing stray light in the projection light machine. ;Similarly, the second filter can also absorb the light beam emitted by the first light-emitting panel and refracted by the light combining device and then illuminated at the second incident surface, and the light beam emitted by the third light-emitting panel is refracted by the light combining device and then illuminated. The light beam arriving at the second incident surface reduces the possibility of the light beam emitted by the first luminescent panel and the third luminescent panel forming stray light, and reduces the stray light in the projector; the third filter can also absorb the first luminescent panel. The light beam emitted by the light-emitting panel and refracted by the light combining device is illuminated at the third incident surface, and the light beam emitted by the second light emitting panel and refracted by the light combining device is illuminated at the third incident surface, thereby reducing the first luminescence. The possibility of the light beam emitted by the panel and the second light-emitting panel forming stray light reduces the stray light in the projection light machine.
结合第一方面，在一种可能的实现方式中，第一发光面板发射的光束波段大于等于600nm，第二发光面板和第三发光面板发射的光束波段小于600nm；对于大于等于600nm的可见光波段，第一滤光片的透过率均值大于等于50％，第一滤光片的吸收率均值小于等于50％；对于小于600nm的可见光波段，第一滤光片的透过率均值小于等于30％，第一滤光片的吸收率均值大于等于70％。Combined with the first aspect, in a possible implementation, the first light-emitting panel emits a beam band greater than or equal to 600 nm, and the second light-emitting panel and the third light-emitting panel emit a beam band less than 600 nm; for a visible light band greater than or equal to 600 nm, The average transmittance of the first filter is greater than or equal to 50%, and the average absorbance of the first filter is less than or equal to 50%; for the visible light band less than 600 nm, the average transmittance of the first filter is less than or equal to 30%. , the average absorptivity of the first filter is greater than or equal to 70%.
在本种可能的实现方式中，对于第一发光面板发射的光束，第一滤光片的透过率均值大于等于50％且第一滤光片的吸收率均值小于等于50％，保证第一发光面板发射的光束尽可能多地能够透过第一滤光片，且不会被第一滤光片吸收过多，提升了投影光机的色准和对比度等显示效果；对于第二发光面板和第三发光面板所发射的光束，第一滤光片的透过率均值小于等于30％，使得其他发光面板照射到第一入射面后能够透过第一滤光片的光束尽可能少，对于第二发光面板和第三发光面板所发射的光束，第一滤光片的吸收率均值大于等于70％，使得第一滤光片能够尽可能多地吸收其他发光面板照射到第一滤光片处的光束，减小了其他发光面板照射到第一入射面处的光束形成杂散光的可能性，进而减少了投影光机中的杂散光。In this possible implementation, for the light beam emitted by the first light-emitting panel, the average transmittance of the first filter is greater than or equal to 50% and the average absorptivity of the first filter is less than or equal to 50%, ensuring that the first The light beam emitted by the light-emitting panel can pass through the first filter as much as possible without being absorbed too much by the first filter, which improves the color accuracy and contrast of the projector; for the second light-emitting panel For the light beam emitted by the third light-emitting panel, the average transmittance of the first filter is less than or equal to 30%, so that the light beams that can pass through the first filter after being illuminated by other light-emitting panels on the first incident surface are as small as possible. For the light beams emitted by the second light-emitting panel and the third light-emitting panel, the average absorption rate of the first filter is greater than or equal to 70%, so that the first filter can absorb as much light as possible from other light-emitting panels to the first filter The light beam at the first incident surface is reduced, thereby reducing the possibility of stray light being formed by light beams from other light-emitting panels striking the first incident surface, thereby reducing stray light in the projection light machine.
结合第一方面，在一种可能的实现方式中，第二发光面板发射的光束波段小于等于480nm，第一发光面板和第三发光面板发射的光束波段大于480nm；对于小于等于480nm的可见光波段，第二滤光片的透过率均值大于等于50％，第二滤光片的吸收率均值小于等于50％；对于大于480nm的可见光波段，第二滤光片的透过率均值小于等于30％，第二滤光片的吸收率均值大于等于70％。Combined with the first aspect, in one possible implementation, the second light-emitting panel emits a beam band of less than or equal to 480 nm, and the first light-emitting panel and the third light-emitting panel emit a beam band of greater than 480 nm; for the visible light band of less than or equal to 480 nm, The average transmittance of the second filter is greater than or equal to 50%, and the average absorbance of the second filter is less than or equal to 50%; for the visible light band greater than 480nm, the average transmittance of the second filter is less than or equal to 30%. , the average absorptivity of the second filter is greater than or equal to 70%.
在本种可能的实现方式中，对于第二发光面板发射的光束，第二滤光片的透过率均值大于等于50％且第二滤光片的吸收率均值小于等于50％，保证第二发光面板发射的光束尽可能多地能够透过第二滤光片，且不会被第二滤光片吸收过多，提升了投影光机的色准和对比度等显示效果；对于第一发光面板和第三发光面板所发射的光束，第二滤光片的透过率均值小于等于30％，使得其他发光面板照射到第二入射面后能够透过第二滤光片的光束尽可能少，对于第一发光面板和第三发光面板所发射的光束，第二滤光片的吸收率均值大于等于70％，使得第二滤光片能够尽可能多地吸收其他发光面板照射到第二滤光片处的光束，减小了其他发光面板照射到第二入射面处的光束形成杂散光的可能性，进而减少了投影光机中的杂散光。In this possible implementation, for the light beam emitted by the second light-emitting panel, the average transmittance of the second filter is greater than or equal to 50% and the average absorptivity of the second filter is less than or equal to 50%, ensuring that the second The light beam emitted by the light-emitting panel can pass through the second filter as much as possible without being absorbed too much by the second filter, which improves the color accuracy and contrast of the projector; for the first light-emitting panel For the light beam emitted by the third light-emitting panel, the average transmittance of the second filter is less than or equal to 30%, so that the light beams that can pass through the second filter after being illuminated by other light-emitting panels on the second incident surface are as small as possible. For the light beams emitted by the first light-emitting panel and the third light-emitting panel, the average absorption rate of the second filter is greater than or equal to 70%, so that the second filter can absorb as much light as possible from other light-emitting panels to the second filter The light beam at the second incident surface is reduced, thereby reducing the possibility of stray light being formed by light beams from other light-emitting panels striking the second incident surface, thereby reducing stray light in the projection light machine.
结合第一方面，在一种可能的实现方式中，第三发光面板发射的光束波段大于480nm且小于600nm，第一发光面板发射的光束波段大于等于600nm，第二发光面板发射的光束波段小于等于480nm；对于大于480nm且小于600nm的可见光波段，第三滤光片的透过率均值大于等于50％，第三滤光片的吸收率均值小于等于50％；对于大于等于600nm的可见光波段以及小于等于480nm的可见光波段，第三滤光片的透过率均值小于等于30％，第三滤光片的吸收率均值大于等于70％。Combined with the first aspect, in a possible implementation, the third light-emitting panel emits a beam band greater than 480 nm and less than 600 nm, the first light-emitting panel emits a beam band greater than or equal to 600 nm, and the second light-emitting panel emits a beam band less than or equal to 480nm; for the visible light band greater than 480nm and less than 600nm, the average transmittance of the third filter is greater than or equal to 50%, and the average absorbance of the third filter is less than or equal to 50%; for the visible light band greater than or equal to 600nm and less than In the visible light band equal to 480 nm, the average transmittance of the third optical filter is less than or equal to 30%, and the average absorbance of the third optical filter is greater than or equal to 70%.
在本种可能的实现方式中，对于第三发光面板发射的光束，第三滤光片的透过率均值大于等于50％且第三滤光片的吸收率均值小于等于50％，保证第三发光面板发射的光束尽可能多地能够透过第三滤光片，且不会被第三滤光片吸收过多，提升了投影光机的色准和对比度等显示效果；对于第一发光面板和第二发光面板所发射的光束，第三滤光片的透过率均值小于等于30％，使得其他发光面板照射到第三入射面后能够透过第三滤光片的光束尽可能少，对于第一发光面板和第二发光面板所发射的光束，第三滤光片的吸收率均值大于等于70％，使得第三滤光片能够尽可能多地吸收其他发光面板照射到第三滤光片处的光束，减小了其他发光面板照射到第三入射面处的光束形成杂散光的可能性，进而减少了投影光机中的杂散光。In this possible implementation, for the light beam emitted by the third light-emitting panel, the average transmittance of the third filter is greater than or equal to 50% and the average absorptivity of the third filter is less than or equal to 50%, ensuring that the third The light beam emitted by the light-emitting panel can pass through the third filter as much as possible without being absorbed too much by the third filter, which improves the color accuracy and contrast of the projector; for the first light-emitting panel For the light beam emitted by the second light-emitting panel, the average transmittance of the third filter is less than or equal to 30%, so that the light beams that can pass through the third filter after being illuminated by other light-emitting panels on the third incident surface are as small as possible. For the light beams emitted by the first light-emitting panel and the second light-emitting panel, the average absorption rate of the third filter is greater than or equal to 70%, so that the third filter can absorb as much light as possible from other light-emitting panels to the third filter The light beam at the third incident surface is reduced, thereby reducing the possibility of stray light formed by light beams from other light-emitting panels striking the third incident surface, thereby reducing stray light in the projection light machine.
结合第一方面，在一种可能的实现方式中，合光装置包括出射面、以及交叉设置的第一二向色发射面和第二二向色反射面，第一二向色发射面和第二二向色反射面位于出射面和多个入射面包围形成的空间内，第一发光面板所发射的光束经第一入射面、第一二向色反射面反射后从出射面出射；第二自发光面板所发射的光束经第二入射面、第二二向色反射面反射后从出射面出射；第三发光面板所发射的光束经第三入射面、第一二向反射面和第二二向色反射面从出射面出射。In conjunction with the first aspect, in a possible implementation, the light combining device includes an exit surface, and a first dichroic emitting surface and a second dichroic reflecting surface that are intersectingly arranged. The first dichroic emitting surface and the second dichroic reflecting surface are The two dichroic reflective surfaces are located in the space surrounded by the exit surface and multiple incident surfaces. The light beam emitted by the first light-emitting panel is reflected by the first incident surface and the first dichroic reflective surface and then emerges from the exit surface; The light beam emitted by the self-luminous panel is reflected by the second incident surface and the second dichroic reflective surface and then emerges from the exit surface; the light beam emitted by the third luminous panel is reflected by the third incident surface, the first dichroic reflective surface and the second dichroic reflective surface. The dichroic reflective surface emerges from the exit surface.
在本种可能的实现方式中，第一二向色发射面和第二二向色发射面位于多个入射面和出射面围合形成的空间内，使得投影光机整体的空间利用率高，有利于减小投影光机整体的体积。In this possible implementation, the first dichroic emission surface and the second dichroic emission surface are located in a space enclosed by multiple incident surfaces and exit surfaces, so that the overall space utilization of the projection light machine is high. It is beneficial to reduce the overall size of the projection light machine.
结合第一方面，在一种可能的实现方式中，第一入射面与第二入射面相对并平行设置，第三入射面与出射面相对并平行设置，第一入射面与第三入射面相垂直，第一入射面与第一二向色反射面相交，第一入射面与第一二向色反射面相交。In conjunction with the first aspect, in a possible implementation, the first incident surface is opposite to and arranged parallel to the second incident surface, the third incident surface is opposite to and arranged parallel to the exit surface, and the first incident surface is perpendicular to the third incident surface , the first incident surface intersects the first dichroic reflection surface, and the first incident surface intersects the first dichroic reflection surface.
结合第一方面，在一种可能的实现方式中，投影光机还包括与多个发光单元一一对应的多个透镜阵列，每个透镜阵列设置发光单元与入射面之间，透镜阵列用于缩小对应发光单元所发射的光束的发散角。In connection with the first aspect, in a possible implementation, the projection light machine further includes a plurality of lens arrays corresponding to a plurality of light-emitting units, each lens array is disposed between the light-emitting unit and the incident surface, and the lens array is used to Reduce the divergence angle of the light beam emitted by the corresponding light-emitting unit.
在本种可能的实现方式中，通过在发光单元和入射面之间设置透镜阵列，使得发光单元发射的光束能够通过透镜阵列来减小入射到合光装置内的光束的发散角，使得照射到合光装置内的光束反射率较高，有利于提升投影光机的显示效果。In this possible implementation, a lens array is provided between the light-emitting unit and the incident surface, so that the light beam emitted by the light-emitting unit can pass through the lens array to reduce the divergence angle of the light beam incident into the light combining device, so that the light beam is illuminated The light beam reflectivity in the light combining device is high, which is beneficial to improving the display effect of the projector.
第二方面，本申请实施例提供一种电子设备，其包括主板和如第一方面任一实现方式的投影光机，投影光机设置在主板上。In a second aspect, embodiments of the present application provide an electronic device, which includes a motherboard and a light projection engine as implemented in any of the first aspects, and the light projection engine is disposed on the motherboard.
附图说明Description of drawings
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。In order to more clearly explain the technical solutions in the embodiments of the present application or the background technology, the drawings required to be used in the embodiments or the background technology of the present application will be described below.
图1为一种相关技术中的投影光机的结构示意图；Figure 1 is a schematic structural diagram of a projection light machine in related technology;
图2为另一种相关技术中的投影光机的结构示意图；Figure 2 is a schematic structural diagram of a projection light machine in another related technology;
图3为又一种相关技术中的投影光机的结构示意图；Figure 3 is a schematic structural diagram of a projection light machine in yet another related technology;
图4为蓝色二向色镀膜反射率与波长的关系图；Figure 4 is a graph showing the relationship between reflectance and wavelength of blue dichroic coating;
图5为相关技术中的投影光机中杂散光线的示意图；Figure 5 is a schematic diagram of stray light in a projection light machine in the related art;
图6为本申请一实施例提供的一种投影光机的结构示意图；Figure 6 is a schematic structural diagram of a projection light machine provided by an embodiment of the present application;
图7为本申请一实施例提供的另一种投影光机的结构示意图；Figure 7 is a schematic structural diagram of another projection light machine provided by an embodiment of the present application;
图8a为本申请一实施例提供的一种投影光机中透镜阵列的一种设置方式的结构示意图；Figure 8a is a schematic structural diagram of an arrangement of a lens array in a projection light machine according to an embodiment of the present application;
图8b为本申请一实施例提供的一种投影光机中透镜阵列的另一种设置方式的结构示意图；Figure 8b is a schematic structural diagram of another arrangement of a lens array in a projection light machine according to an embodiment of the present application;
图8c为本申请一实施例提供的一种投影光机中透镜阵列的又一种设置方式的结构示意图。FIG. 8c is a schematic structural diagram of yet another arrangement of a lens array in a projection light machine according to an embodiment of the present application.
附图标记说明：Explanation of reference symbols:
投影光机-100、发光单元-10、第一发光面板-10a、第二发光面板-10b、第三发光面板-10c、基板-11、主动发光器件-12、盖板-13、合光装置-20、入射面-21、第一入射面-21a、第二入射面-21b、第三入射面-21c、出射面-22、第一二向色反射面-23、第二二向色反射面-24、滤光件-30、第一滤光片-30a、第二滤光片-30b、第三滤光片-30c、镜头-40、透镜阵列-50。Projection light machine-100, light-emitting unit-10, first light-emitting panel-10a, second light-emitting panel-10b, third light-emitting panel-10c, substrate-11, active light-emitting device-12, cover-13, light combining device -20, incident surface-21, first incident surface-21a, second incident surface-21b, third incident surface-21c, exit surface-22, first dichroic reflection surface-23, second dichroic reflection Surface-24, filter-30, first filter-30a, second filter-30b, third filter-30c, lens-40, lens array-50.
具体实施方式Detailed ways
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below in conjunction with the accompanying drawings.
随着主动发光显示器技术的不断发展，有机发光二极管(organic light-emitting diode，OLED)和发光二极管(light emitting diode，LED)的尺寸在不断缩小，以CMOS工艺电路为驱动背板的Micro OLED和MicroLED的像素尺寸可以做到10μ以下，甚至可以做到纳米级别。如果采用主动发光的Micro OLED或者MicroLED作为图像源，直接通过镜头组将Micro OLED或者Micro LED面板上的图像投影出去，由于不需要光源、匀光器件、棱镜等元件，可以大大地简化投影光机的系统，减少投影光机体积，有利于实现极小体积的投影光机，适用于AR眼镜。With the continuous development of active light-emitting display technology, the sizes of organic light-emitting diodes (OLEDs) and light emitting diodes (LEDs) are constantly shrinking. Micro OLEDs and Micro OLEDs that use CMOS process circuits as the driving backplane The pixel size of MicroLED can be below 10μ, or even at the nanometer level. If active light-emitting Micro OLED or Micro LED is used as the image source, and the image on the Micro OLED or Micro LED panel is projected directly through the lens group, the projection light machine can be greatly simplified since there is no need for light sources, uniform light devices, prisms and other components. The system reduces the size of the projection light machine, which is conducive to realizing a very small size projection light machine, and is suitable for AR glasses.
基于显示原理和制备工艺，主动发光器件Micro LED和Micro OLED的全彩光机方案包括空间分离的彩色像素以及合色方案，其中合色方案又分为像素级别合色和棱镜合色方案。Based on the display principle and preparation process, the full-color opto-mechanical solution for active light-emitting devices Micro LED and Micro OLED includes spatially separated color pixels and color combination solutions. The color combination solution is divided into pixel-level color combination and prism color combination solutions.
其中，空间分离的彩色像素原理与常见的LCD或OLED面板类似，采用单一的发光面板实现全彩发光，如图1所示，一种相关技术中，每一个像素都是由空间分离的RGB子像素所组成，由于人眼的分辨率有限，当子像素尺寸足够小的时候，人眼无法区分RGB子像素的空间分离，而是看成一个全彩的像素，以实现全彩的显示。在AR光机中，以此彩色主动发光像素阵列为显示面板，然后通过镜头组直接进行投影。这种方案对于Micro LED来说，其制备工艺难度较大。Among them, the principle of spatially separated color pixels is similar to that of common LCD or OLED panels. A single light-emitting panel is used to achieve full-color emission, as shown in Figure 1. In a related technology, each pixel is composed of spatially separated RGB sub-pixels. Composed of pixels, due to the limited resolution of the human eye, when the sub-pixel size is small enough, the human eye cannot distinguish the spatial separation of RGB sub-pixels, but sees it as a full-color pixel to achieve full-color display. In the AR optical machine, this color active light-emitting pixel array is used as the display panel, and then projected directly through the lens group. For Micro LED, the preparation process of this solution is relatively difficult.
基于MicroLED显示面板，对于制备工艺来说，由于LED材料的特性，LED发光器件均需要在特殊的基底(如蓝宝石基底)上进行外延生长，而不同颜色的LED由于发光材料有所不同，需要分别进行生长和制备，然后通过巨量转移的技术分别将RGB的子像素转移到目标的CMOS电路基底上，这就导致了整个加工工艺复杂度高，良率低。为了避免多次巨量转移的工艺，另一种制作工艺是先通过较为成熟的工艺制备单色的Micro LED发光面板(如蓝光Micro LED)，蓝光Micro LED像素数目是目标显示像素的3倍，然后通过特殊工艺，将光转换材料(如绿光量子点或红光量子点)分别以子像素大小制备在目标的蓝色Micro LED的子像素上，然后通过蓝光Micro LED对目标光转换材料进行光致激发，显示出绿色像素和红色像素，继而实现全彩的发光面板。Based on MicroLED display panels, regarding the preparation process, due to the characteristics of LED materials, LED light-emitting devices need to be epitaxially grown on a special substrate (such as a sapphire substrate), and LEDs of different colors need to be grown separately due to different light-emitting materials. Growth and preparation are performed, and then the RGB sub-pixels are transferred to the target CMOS circuit substrate through mass transfer technology. This results in high complexity of the entire processing process and low yield. In order to avoid multiple large-volume transfer processes, another manufacturing process is to first prepare a single-color Micro LED light-emitting panel (such as blue Micro LED) through a more mature process. The number of blue Micro LED pixels is three times the target display pixels. Then through a special process, the light conversion materials (such as green light quantum dots or red light quantum dots) are prepared in sub-pixel sizes on the sub-pixels of the target blue Micro LED, and then the target light conversion material is photoinduced by the blue light Micro LED. When excited, green pixels and red pixels are displayed, thereby achieving a full-color luminescent panel.
另外，对于Micro OLED面板，可以直接通过传统的工艺(如蒸镀、Inkjet Printing等)，制备空间分离的全彩Micro OLED面板。In addition, for Micro OLED panels, spatially separated full-color Micro OLED panels can be prepared directly through traditional processes (such as evaporation, Inkjet Printing, etc.).
然而，无论是Micro LED还是Micro OLED，由于空间分离的彩色像素结构，导致真实显示的分辨率是子像素分辨率的三分之一，因此会造成分辨率的损失。在子像素尺寸一定的情况下(子像素的最小尺寸通常被加工工艺、性能限制)，要么牺牲实际的显示分辨率，如1920*1080个子像素，实际只能显示1920*1080/3的分辨率；要么增加子像素，例如采用1920*1080*3个子像素显示1920*1080的分辨率，但是在无法减小子像素尺寸的情况下，这样会增加显示面板的尺寸，进一步增加光机的体积。However, whether it is Micro LED or Micro OLED, due to the spatially separated color pixel structure, the actual display resolution is one-third of the sub-pixel resolution, thus causing a loss of resolution. When the sub-pixel size is certain (the minimum size of a sub-pixel is usually limited by processing technology and performance), either the actual display resolution is sacrificed, such as 1920*1080 sub-pixels, and the actual resolution can only be displayed at 1920*1080/3 ; Either increase the sub-pixels, for example, use 1920*1080*3 sub-pixels to display a resolution of 1920*1080. However, if the sub-pixel size cannot be reduced, this will increase the size of the display panel and further increase the volume of the optical machine.
为了解决空间分离全彩Micro LED在工艺上的限制，以及分辨率和体积的相互制约，另一种相关技术中提出了垂直堆叠结构方案，如图2所示，RGB的子像素不再是平面空间上分离的子像素，而是在垂直方向上堆叠起来，通过像素边缘的导光结构，将光线导出面板，实现向上发光。这种方案的好处是，彩色子像素在垂直空间堆叠，没有牺牲平面方向上的面积，因此实际显示的分辨率与平面方向上的像素数目一致，没有牺牲分辨率。但是这种方案的工艺制备涉及到RGB彩色像素的垂直堆叠以及侧壁导光结构的制备，工艺难度很大。In order to solve the process limitations of spatially separated full-color Micro LED, as well as the mutual constraints of resolution and volume, another related technology proposes a vertical stacking structure scheme. As shown in Figure 2, the RGB sub-pixels are no longer flat. The spatially separated sub-pixels are stacked vertically, and the light is directed out of the panel through the light guide structure at the edge of the pixel to achieve upward emission. The advantage of this solution is that the color sub-pixels are stacked in vertical space without sacrificing the area in the plane direction. Therefore, the actual display resolution is consistent with the number of pixels in the plane direction without sacrificing resolution. However, the process preparation of this solution involves the vertical stacking of RGB color pixels and the preparation of sidewall light guide structures, which is very difficult.
由于空间分离和垂直堆叠的全彩Micro LED的制备工艺难度很大，又一种相关技术中提出了采用三个单色的RGB Micro LED发光面板通过合光棱镜进行合光，如图3所示，实现全彩画面，再通过镜头组进行投影。在此方案中，蓝色光线及红色光线分别通过合光棱镜中间设置的蓝色二向色镀膜及红色二向色镀膜反射，进入光机镜头，如此同时，绿色光线直接穿透合光棱镜，进入光机镜头，因此，可以通过合光棱镜实现全彩显示。Since the preparation process of spatially separated and vertically stacked full-color Micro LEDs is very difficult, another related technology proposes to use three monochromatic RGB Micro LED light-emitting panels to combine the light through a light combining prism, as shown in Figure 3 , to achieve full-color images, which are then projected through the lens set. In this solution, blue light and red light are respectively reflected by the blue dichroic coating and red dichroic coating set in the middle of the light combining prism, and enter the optical machine lens. At the same time, the green light directly penetrates the light combining prism. Entering the opto-mechanical lens, therefore, full-color display can be achieved through the light combining prism.
理想情况下，蓝色二向镀膜可以对蓝色波段任何角度光线具有100％的反射率，对其他波段任何角度的可见光光线具有100％的透射率。然而实际的蓝光二向色镀膜，根据入射光线的不同角度，实际上镀膜对应的光谱曲线差异较大。如图4所示，负十三度入射的光线，其在512nm波长(蓝绿光)仍有接近100％的反射率，而对于十三度入射的光线，对于484nm的蓝光光线，其反射率就降低为约等于0％。当入射角度在正负十三度以外的情况下，其差异会更大，而Micro LED发光面板发出光线的角度是在正负75度范围内的。由于二向色镀膜的波长/角度特性，导致合色全彩Micro LED光机方案存在如图5所示，蓝色Micro LED面板发出的大角度光线照射到蓝色二向色镀膜上，由于光线角度较大，蓝色二向色镀膜对其的反射率无法达到100％，因此还有光线透过蓝色二向色镀膜继续前进，前进的光线可以有多种路径，如图5中的虚线箭头所示的光线，光线照射到红色Micro LED面板表面上，被其表面的盖板玻璃反射，照射到绿色Micro LED面板上，再经过其表面盖板玻璃反射，最终进入镜头组。Ideally, the blue dichroic coating can have 100% reflectivity for light at any angle in the blue band and 100% transmittance for visible light at any angle in other bands. However, for actual blue dichroic coatings, the spectral curves corresponding to the coatings actually vary greatly depending on the angle of the incident light. As shown in Figure 4, for light incident at minus 13 degrees, it still has a reflectivity of close to 100% at the wavelength of 512nm (blue-green light), while for light incident at 13 degrees, for blue light at 484nm, its reflectivity It is reduced to approximately 0%. When the incident angle is outside of plus or minus 13 degrees, the difference will be even greater, while the angle at which the Micro LED light-emitting panel emits light is within the range of plus or minus 75 degrees. Due to the wavelength/angle characteristics of the dichroic coating, a combined color full-color Micro LED optical machine solution exists. As shown in Figure 5, the large-angle light emitted by the blue Micro LED panel illuminates the blue dichroic coating. Due to the light At a larger angle, the reflectivity of the blue dichroic coating cannot reach 100%, so there is still light that continues to advance through the blue dichroic coating. The advancing light can have multiple paths, as shown by the dotted line in Figure 5 The light shown by the arrow shines on the surface of the red Micro LED panel, is reflected by the cover glass on the surface, shines on the green Micro LED panel, is reflected by the cover glass on the surface, and finally enters the lens group.
而这部分由于未按照理想的路径前行，导致这部分光线无法被镜头精准解像，最终形成整个光学系统的杂散光(如图5中的虚线箭头所示的光线)，影响最终的显示效果。Because this part does not follow the ideal path, this part of the light cannot be accurately resolved by the lens, and eventually forms stray light in the entire optical system (the light shown by the dotted arrow in Figure 5), affecting the final display effect. .
以下对本申请实施例的技术方案进行说明。The technical solutions of the embodiments of the present application are described below.
本申请提供一种电子设备，电子设备可以是AR设备，如AR眼镜或头戴式设备等。This application provides an electronic device. The electronic device may be an AR device, such as AR glasses or a head-mounted device.
请参阅图6，图6为本申请一实施例提供的一种投影光机100的结构示意图。电子设备包括本申请提供的投影光机100和主板，投影光机100设置在主板上。主板用于固定投影光机100。Please refer to FIG. 6 , which is a schematic structural diagram of a projection light machine 100 according to an embodiment of the present application. The electronic device includes the light projection engine 100 provided by this application and a motherboard, and the light projection engine 100 is arranged on the motherboard. The main board is used to fix the projector 100 .
一种实施方式中，投影光机100为自发光投影显示系统，投影光机100为电子设备的图像显示的光源，投影光机100发射出的光束通过光波导结构的耦入结构进入光波导结构后，再由光波导结构的耦出结构将光线耦出到人眼，耦出的光线形成虚拟的图像，因此，人眼能够看到虚拟的图像，其中，投影光机100为全彩光机，如此，可以形成全彩图像。In one embodiment, the light projection machine 100 is a self-luminous projection display system. The light projection machine 100 is a light source for image display of electronic equipment. The light beam emitted by the light projection machine 100 enters the optical waveguide structure through the coupling structure of the optical waveguide structure. Afterwards, the light is coupled out to the human eye through the coupling structure of the optical waveguide structure, and the coupled light forms a virtual image. Therefore, the human eye can see the virtual image. The projection light machine 100 is a full-color light machine. , In this way, a full-color image can be formed.
投影光机100包括多个发光单元10、合光装置20、与多个发光单元10一一对应的多个滤光件30以及镜头40，多个合光单元围绕合光装置20设置，多个发光单元10分别用于发出不同颜色的光束，滤光件30位于发光单元10和合光装置20之间，滤光件30和对应的发光单元10相对设置。其中，与发光单元10对应的滤光件30能够透过该发光单元10发射的光束，而吸收其他发光单元10发射的光束；多个发光单元10所发射的光束经过合光装置20和镜头40后成像在成像平面上，成像平面可以为镜头40之后的无穷远处，当投影光机100应用在例如AR眼镜中时，投影光机100通过镜头40的光束可以反射到用户的眼睛，以使用户可以通过AR眼镜看到通过投影光机100投影显示的画面。The projector 100 includes a plurality of light-emitting units 10, a light combining device 20, a plurality of filters 30 corresponding to the plurality of light-emitting units 10, and a lens 40. The plurality of light combining units are arranged around the light combining device 20, and a plurality of light combining units are arranged around the light combining device 20. The light-emitting units 10 are respectively used to emit light beams of different colors. The filter 30 is located between the light-emitting unit 10 and the light combining device 20 . The filter 30 and the corresponding light-emitting unit 10 are arranged oppositely. Among them, the filter 30 corresponding to the light-emitting unit 10 can pass the light beam emitted by the light-emitting unit 10 and absorb the light beam emitted by other light-emitting units 10; the light beams emitted by multiple light-emitting units 10 pass through the light combining device 20 and the lens 40 The rear image is formed on the imaging plane, and the imaging plane can be infinity behind the lens 40. When the projection light machine 100 is used in, for example, AR glasses, the light beam of the projection light machine 100 passing through the lens 40 can be reflected to the user's eyes, so that The user can see the image projected and displayed by the projector 100 through AR glasses.
每个发光单元10在合光装置20内部容易出现折射，而照射到其他发光单元10处导致投影光机100出现杂散光，通过在每个发光单元10和对应的入射面21之间设置滤光件30，与发光单元10对应的滤光件30能够吸收其他发光单元10照射到该发光单元10处的光束，减少投影光机100中的杂散光，且与发光单元10对应的滤光件30能够透过发光单元10发射的光束，以实现投影光机100的彩色显示。Each light-emitting unit 10 is prone to refraction within the light combining device 20, and the irradiation of other light-emitting units 10 causes stray light to appear in the projector 100. By setting a light filter between each light-emitting unit 10 and the corresponding incident surface 21 The filter 30 corresponding to the light-emitting unit 10 can absorb the light beams irradiated from other light-emitting units 10 to the light-emitting unit 10 to reduce stray light in the projector 100, and the filter 30 corresponding to the light-emitting unit 10 The light beam emitted by the light-emitting unit 10 can be transmitted through to realize the color display of the projector 100 .
每个发光单元10均包括基板11和颜色像素，颜色像素设置在基板11上，颜色像素的数量为多个，多个颜色像素呈矩阵分布，颜色像素用于发射颜色光束。Each light-emitting unit 10 includes a substrate 11 and color pixels. The color pixels are arranged on the substrate 11. The number of color pixels is multiple. The multiple color pixels are distributed in a matrix. The color pixels are used to emit color light beams.
颜色像素包括主动发光器件12，主动发光器件12可以为Micro LED或Micro OLED，主动发光器件12位于基板11和盖板13之间，主动发光器件12用于发射颜色光束。The color pixel includes an active light-emitting device 12. The active light-emitting device 12 can be a Micro LED or a Micro OLED. The active light-emitting device 12 is located between the substrate 11 and the cover 13. The active light-emitting device 12 is used to emit color light beams.
一种实施方式中，发光单元10还包括盖板13，盖板13盖合在基板11上，并用于封装安装在基板11上的颜色像素，主动发光器件12发射的颜色光束透过盖板13朝向合光装置20发射。In one embodiment, the light-emitting unit 10 further includes a cover plate 13. The cover plate 13 is closed on the substrate 11 and is used to encapsulate the color pixels installed on the substrate 11. The color light beam emitted by the active light-emitting device 12 passes through the cover plate 13. Emit towards the light combining device 20.
多个发光单元10包括第一发光面板10a、第二发光面板10b和第三发光面板10c，第一发光面板10a、第二发光面板10b和第三发光面板10c分别发射不同颜色的光束，例如，第一发光面板10a发射波段大于等于600nm的红色光束，第二发光面板10b发射波段小于等于480nm的蓝色光束，第三发光面板10c发射波段大于480nm且小于600nm的绿色光束，第一发光面板10a、第二发光面板10b和第三发光面板10c通过合光装置20进行合光，一方面保证了投影光机100的小体积，另一方面实现彩色光束的出射，以实现全彩显示。The plurality of light-emitting units 10 includes a first light-emitting panel 10a, a second light-emitting panel 10b and a third light-emitting panel 10c. The first light-emitting panel 10a, the second light-emitting panel 10b and the third light-emitting panel 10c respectively emit light beams of different colors, for example, The first light-emitting panel 10a emits a red light beam with a wavelength band greater than or equal to 600 nm, the second light-emitting panel 10b emits a blue light beam with a wavelength band less than or equal to 480 nm, and the third light-emitting panel 10c emits a green light beam with a wavelength band greater than 480 nm and less than 600 nm. The first light-emitting panel 10a The second light-emitting panel 10b and the third light-emitting panel 10c combine the light through the light combining device 20, which on the one hand ensures the small size of the projector 100 and on the other hand enables the emission of colored light beams to achieve full-color display.
合光装置20包括多个入射面21、出射面22、第一二向色反射面23和第二二向色反射面24，每个入射面21与对应的一个发光单元10相对设置，每个滤光件30位于对应的发光单元10和对应的入射面21之间，第一二向色反射面23和第二二向色反射面24交叉设置，多个入射面21和出射面22包围第一二向色反射面23和第二二向色反射面24。例如，第一发光面板10a对应一个入射面21，第二发光面板10b对应另一个入射面21，第三发光面板10c对应又一个入射面21，第一发光面板10a、第二发光面板10b和第三发光面板10c分别从对应的入射面21入射到合光装置20后经合光装置20中的第一二向色反射面23和第二二向色反射面24合路后从出射面22出射。The light combining device 20 includes a plurality of incident surfaces 21, an exit surface 22, a first dichroic reflective surface 23 and a second dichroic reflective surface 24. Each incident surface 21 is arranged opposite to a corresponding light-emitting unit 10, and each The filter 30 is located between the corresponding light-emitting unit 10 and the corresponding incident surface 21. The first dichroic reflective surface 23 and the second dichroic reflective surface 24 are intersectingly arranged. A plurality of incident surfaces 21 and exit surfaces 22 surround the first dichroic reflective surface 23 and the second dichroic reflective surface 24. A dichroic reflective surface 23 and a second dichroic reflective surface 24 . For example, the first light-emitting panel 10a corresponds to one incident surface 21, the second light-emitting panel 10b corresponds to another incident surface 21, and the third light-emitting panel 10c corresponds to another incident surface 21. The first light-emitting panel 10a, the second light-emitting panel 10b and the third light-emitting panel 10 The three light-emitting panels 10c respectively enter the light combining device 20 from the corresponding incident surface 21, are combined through the first dichroic reflective surface 23 and the second dichroic reflective surface 24 in the light combining device 20, and then emit from the exit surface 22. .
示例地，多个入射面21包括第一入射面21a、第二入射面21b和第三入射面21c，第一入射面21a与第二入射面21b相对并平行设置，第三入射面21c和出射面22相对并平行设置，第一入射面21a和第三入射面21c相垂直，第一二向色反射面23和第二二向色反射面24位于第一入射面21a、第二入射面21b、第三入射面21c和出射面22包围形成的空间内，第一入射面21a与第一二向色反射面23相交，第一入射面21a与第二二向色反射面24相交。其中，第一发光面板10a、第二发光面板10b和第三发光面板10c分别发射的光束经合光装置20、第一二向色反射面23和第二二向色反射面24后从出射面22合路出射。For example, the plurality of incident surfaces 21 include a first incident surface 21a, a second incident surface 21b and a third incident surface 21c. The first incident surface 21a is opposite to and parallel to the second incident surface 21b. The third incident surface 21c and the exit surface 21c are arranged parallel to each other. The surfaces 22 are opposite and parallel, the first incident surface 21a and the third incident surface 21c are perpendicular, the first dichroic reflection surface 23 and the second dichroic reflection surface 24 are located on the first incident surface 21a and the second incident surface 21b In the space formed by the third incident surface 21c and the exit surface 22, the first incident surface 21a intersects the first dichroic reflection surface 23, and the first incident surface 21a intersects the second dichroic reflection surface 24. Among them, the light beams emitted by the first light-emitting panel 10a, the second light-emitting panel 10b and the third light-emitting panel 10c respectively pass through the light combining device 20, the first dichroic reflection surface 23 and the second dichroic reflection surface 24 and then exit from the exit surface. 22 combined shot.
合光装置20为矩形棱镜，第一入射面21a、第二入射面21b、第三入射面21c和出射面22为合光装置20的四个表面，将第一二向色反射面23和第二二向色反射面24设置在第一入射面21a、第二入射面21b、第三入射面21c和出射面22之间，使得投影光机100整体的空间利用率高，有利于减小投影光机100整体的体积。The light combining device 20 is a rectangular prism. The first incident surface 21a, the second incident surface 21b, the third incident surface 21c and the exit surface 22 are the four surfaces of the light combining device 20. The first dichroic reflecting surface 23 and the third incident surface are The two dichroic reflection surfaces 24 are arranged between the first incident surface 21a, the second incident surface 21b, the third incident surface 21c and the exit surface 22, so that the overall space utilization rate of the projection light machine 100 is high, which is conducive to reducing the size of the projection. The overall volume of the optical machine 100.
其中，第一发光面板10a与第一入射面21a相对设置，第一发光面板10a所发射的光束经对应的滤光件30、第一入射面21a、第一二向色反射面23反射后从出射面22出射到镜头40；第二发光面板10b和第二入射面21b相对设置，第二发光面板10b所发射的光束经对应的滤光件30、第二入射面21b、第二二向色反射面24反射后从出射面22出射到镜头40；第三发光面板10c与第三入射面21c相对设置，第三发光面板10c所发射的光束经对应的滤光件30、第三入射面21c、第一二向色反射面23、第二二向色反射面24从出射面22出射到镜头40。Among them, the first light-emitting panel 10a is arranged opposite to the first incident surface 21a. The light beam emitted by the first light-emitting panel 10a is reflected by the corresponding filter 30, the first incident surface 21a, and the first dichroic reflective surface 23 and then reflects from the first dichroic reflective surface 23. The exit surface 22 emits to the lens 40; the second light-emitting panel 10b and the second incident surface 21b are arranged oppositely, and the light beam emitted by the second light-emitting panel 10b passes through the corresponding filter 30, the second incident surface 21b, and the second dichroic After reflection by the reflective surface 24, it is emitted from the exit surface 22 to the lens 40; the third light-emitting panel 10c is arranged opposite to the third incident surface 21c, and the light beam emitted by the third light-emitting panel 10c passes through the corresponding filter 30 and the third incident surface 21c , the first dichroic reflection surface 23 and the second dichroic reflection surface 24 emit from the exit surface 22 to the lens 40 .
当第一发光面板10a发射红色光束、第二发光面板10b发射蓝色光束、第三发光面板10c发射绿色光束时，第一二向色反射面23为红色二向色反射面，第一二向色反射面23用于反射第一发光面板10a发射的红色光束、透过第二发光面板10b发射的蓝色光束和透过第三发光面板10c发射的绿色光束；第二二向色反射面24为蓝色二向色反射面，第二二向色反射面24用于反射第二发光面板10b发射的蓝色光束、透过第一发光面板10a发射的红色光束和透过第三发光面板10c发射的绿色光束。When the first light-emitting panel 10a emits a red light beam, the second light-emitting panel 10b emits a blue light beam, and the third light-emitting panel 10c emits a green light beam, the first dichroic reflective surface 23 is a red dichroic reflective surface. The color reflective surface 23 is used to reflect the red light beam emitted by the first light-emitting panel 10a, the blue light beam emitted through the second light-emitting panel 10b, and the green light beam emitted through the third light-emitting panel 10c; the second dichroic reflective surface 24 It is a blue dichroic reflective surface. The second dichroic reflective surface 24 is used to reflect the blue light beam emitted by the second light-emitting panel 10b, the red light beam emitted through the first light-emitting panel 10a and the third light-emitting panel 10c. Green beam emitted.
一种实施方式中，滤光件30贴合在对应的入射面21上，即，与第一发光面板10a对应的滤光件30贴合在第一入射面21a上，与第二发光面板10b对应的滤光件30贴合在第二入射面21b上，与第三发光面板10c对应的滤光件30贴合在第三入射面21c上。例如，当每个发光单元10均设置有对应的盖板13时，将滤光件30贴合在对应的入射面21上，充分利用发光单元10与入射面21之间的空间，提高空间利用率。In one embodiment, the filter 30 is attached to the corresponding incident surface 21 , that is, the filter 30 corresponding to the first light-emitting panel 10 a is attached to the first incident surface 21 a and is connected to the second light-emitting panel 10 b The corresponding filter 30 is bonded on the second incident surface 21b, and the filter 30 corresponding to the third light-emitting panel 10c is bonded on the third incident surface 21c. For example, when each light-emitting unit 10 is provided with a corresponding cover 13, the filter 30 is attached to the corresponding incident surface 21 to fully utilize the space between the light-emitting unit 10 and the incident surface 21 and improve space utilization. Rate.
如图7所示，另一种实施方式中，滤光件30盖合在基板11上，发光单元10的颜色像素位于基板11与滤光件30之间，即，发光单元10未设置盖板13，滤光件30替换发光单元10的盖板13，将滤光件30直接封装在发光单元10的基板11上，如此，可以缩小发光单元10和入射面21之间的距离，减小了投影光机100整体的体积，减少组装工序。As shown in FIG. 7 , in another embodiment, the filter 30 is covered on the substrate 11 , and the color pixels of the light-emitting unit 10 are located between the substrate 11 and the filter 30 , that is, the light-emitting unit 10 is not provided with a cover. 13. The filter 30 replaces the cover 13 of the light-emitting unit 10, and the filter 30 is directly packaged on the substrate 11 of the light-emitting unit 10. In this way, the distance between the light-emitting unit 10 and the incident surface 21 can be reduced, and the distance between the light-emitting unit 10 and the incident surface 21 can be reduced. The overall volume of the projection light machine 100 reduces the assembly process.
沿滤光件30和发光单元10的排列方向上，滤光件30相背的两个表面均为平面，减少发光单元10发射的光束经滤光件30的平面入射、再从滤光件30另一侧的平面后入射到合光装置20的过程中的漫反射，从而有效减少投影光机100中的杂散光。Along the arrangement direction of the filter 30 and the light-emitting unit 10, the two opposite surfaces of the filter 30 are both flat surfaces, which reduces the light beam emitted by the light-emitting unit 10 from being incident on the plane of the filter 30 and then passing through the filter 30. Diffuse reflection occurs when the plane on the other side is incident on the light combining device 20 , thereby effectively reducing stray light in the projection light machine 100 .
多个滤光件30包括第一滤光片30a、第二滤光片30b、第三滤光片30c，第一滤光片30a设置在第一发光面板10a和第一入射面21a之间，第二滤光片30b设置于第二发光面板10b和第二入射面21b之间，第三滤光片30c设置于第三发光面板10c和第三入射面21c之间。The plurality of optical filters 30 include a first optical filter 30a, a second optical filter 30b, and a third optical filter 30c. The first optical filter 30a is disposed between the first light-emitting panel 10a and the first incident surface 21a. The second optical filter 30b is provided between the second light-emitting panel 10b and the second incident surface 21b, and the third optical filter 30c is provided between the third light-emitting panel 10c and the third incident surface 21c.
当第一发光面板10a发射红色光束、第二发光面板10b发射蓝色光束、第三发光面板10c发射绿色光束时，第一滤光片30a可以为红色玻璃面板、第二滤光片30b可以为蓝色玻璃面板、第三滤光片30c为绿色玻璃面板，减少滤光件30的制作成本。When the first light-emitting panel 10a emits a red light beam, the second light-emitting panel 10b emits a blue light beam, and the third light-emitting panel 10c emits a green light beam, the first filter 30a can be a red glass panel, and the second filter 30b can be The blue glass panel and the third filter 30c are green glass panels, which reduces the manufacturing cost of the filter 30 .
第一滤光片30a用于透过第一发光面板10a发射的光束，第一发光面板10a发射的光束中透过第一滤光片30a的部分，结合第二发光面板10b和第三发光面板10c发射的光束，实现投影光机100的全彩显示。The first filter 30a is used to transmit the light beam emitted by the first light-emitting panel 10a. The part of the light beam emitted by the first light-emitting panel 10a that passes through the first filter 30a is combined with the second light-emitting panel 10b and the third light-emitting panel. The light beam emitted by 10c realizes the full-color display of the projection light machine 100.
其中，第一滤光片30a能够吸收不同于第一发光面板10a所发射的颜色光束，例如，第一滤光片30a吸收第二发光面板10b和第三发光面板10c所发射的光束。具体地，由于第二二向色反射面24并不能对第二发光面板10b发射的光束达到100％的反射率，第二发光面板10b发射的光束中存在一部分光束从第二二向色反射面24透过并照射到第一入射面21a上，如图6中的虚线所示的光束为照射到第一入射面21a的光束，设置第一滤光片30a在第一入射面21a处将该部分光束吸收掉，从而不会形成整个投影光机100中的杂散光，有利于提升投影光机100的色准和对比度。The first optical filter 30a can absorb light beams of different colors than those emitted by the first light-emitting panel 10a. For example, the first optical filter 30a absorbs light beams emitted by the second light-emitting panel 10b and the third light-emitting panel 10c. Specifically, since the second dichroic reflective surface 24 cannot achieve 100% reflectivity for the light beam emitted by the second light-emitting panel 10b, some of the light beams emitted by the second light-emitting panel 10b are emitted from the second dichroic reflective surface. 24 passes through and illuminates the first incident surface 21a. The light beam shown by the dotted line in Figure 6 is the light beam that illuminates the first incident surface 21a. The first filter 30a is set at the first incident surface 21a to Part of the light beam is absorbed, so that stray light in the entire projection light machine 100 is not formed, which is beneficial to improving the color accuracy and contrast of the projection light machine 100 .
第三发光面板10c发射的光束经合光装置20后可能存在部分光束反射到第一入射面21a处，第一滤光片30a可以将该部分光束吸收掉，以减少投影光机100中的杂散光。After the light beam emitted by the third light-emitting panel 10c passes through the light combining device 20, some of the light beam may be reflected to the first incident surface 21a. The first optical filter 30a can absorb this part of the light beam to reduce the noise in the projection light machine 100. astigmatism.
本实施例中，通过第一滤光片30a吸收第二发光面板10b和/或第三发光面板10c发射的并经合光装置20折射后照射到第一入射面21a处的光束，以减小第二发光面板10b和/或第三发光面板10c发射的光束形成杂散光的可能性，减少了投影光机100中的杂散光。In this embodiment, the first optical filter 30a absorbs the light beam emitted by the second light-emitting panel 10b and/or the third light-emitting panel 10c and refracted by the light combining device 20 and irradiated to the first incident surface 21a, so as to reduce The possibility of the light beam emitted by the second light-emitting panel 10b and/or the third light-emitting panel 10c forming stray light reduces the stray light in the projection light machine 100.
如前所述，第一发光面板10a发射的光束的波段大于等于600nm，第二发光面板10b发射的光束的波段小于等于480nm，第三发光面板10c发射的光束的波段大于480nm且小于600nm。As mentioned above, the wavelength band of the light beam emitted by the first light-emitting panel 10a is greater than or equal to 600 nm, the wavelength band of the light beam emitted by the second light-emitting panel 10b is less than or equal to 480 nm, and the wavelength band of the light beam emitted by the third light-emitting panel 10c is greater than 480 nm and less than 600 nm.
对于大于等于600nm的可见光波段，第一滤光片30a的透过率均值大于等于50％，例如，第一滤光片30a的透过率均值可以是50％、65％、70％、74％、79％、82％、85％、90％、95％或100％，在满足第一滤光片30a的透过率均值大于等于50％的前提下，第一滤光片30a对大于等于600nm的可见光波段的透过率均值越大，最终从出射面22出射的第一发光面板10a发射的光束能量越高，保证第一发光面板10a发射的光束尽可能多地能够透过第一滤光片30a，有利于提升投影光机100的色准和对比度。For the visible light band of greater than or equal to 600 nm, the average transmittance of the first filter 30a is greater than or equal to 50%. For example, the average transmittance of the first filter 30a may be 50%, 65%, 70%, or 74%. , 79%, 82%, 85%, 90%, 95% or 100%, under the premise that the average transmittance of the first filter 30a is greater than or equal to 50%, the first filter 30a is greater than or equal to 600nm. The greater the average transmittance of the visible light band, the higher the energy of the light beam emitted by the first light-emitting panel 10a that finally emerges from the exit surface 22, ensuring that as much of the light beam emitted by the first light-emitting panel 10a can pass through the first filter as possible The piece 30a is beneficial to improving the color accuracy and contrast of the projection light machine 100.
对于大于等于600nm的可见光波段，第一滤光片30a的吸收率均值小于等于50％，例如，第一滤光片30a的吸收率均值可以是50％、35％、30％、26％、21％、18％、15％、10％、5％或0％，在满足第一滤光片30a的吸收率均值小于等于50％的前提下，第一滤光片30a对大于等于600nm的可见光波段的吸收率均值越小，第一发光发面发射的光束被第一滤光片30a吸收的部分就越少，使得第一发光面板10a发射的光束不会被第一滤光片30a吸收过多，从而提高最终从出射面22出射的第一发光面板10a的光束能量，提升投影光机100的色准和对比度等显示效果。For the visible light band of greater than or equal to 600 nm, the average absorbance of the first filter 30a is less than or equal to 50%. For example, the average absorbance of the first filter 30a can be 50%, 35%, 30%, 26%, 21 %, 18%, 15%, 10%, 5% or 0%, under the premise that the average absorption rate of the first filter 30a is less than or equal to 50%, the first filter 30a is suitable for the visible light band of greater than or equal to 600nm. The smaller the average absorption rate is, the less part of the light beam emitted by the first light-emitting surface is absorbed by the first filter 30a, so that the light beam emitted by the first light-emitting panel 10a will not be absorbed too much by the first filter 30a. , thereby increasing the beam energy of the first light-emitting panel 10a that is finally emitted from the exit surface 22, and improving the display effects such as color accuracy and contrast of the projection light machine 100.
需要说明的是，本申请中提及的透过率均值为在特定范围内光线透过对应滤光件30的平均比例，例如，对于大于等于600nm的可见光波段，该范围内的光线透过第一滤光片30a的平均比例大于等于50％。吸收率均值为在特定范围内光线被对应滤光件30吸收的平均比例，例如，对于大于等于600nm的可见光波段，该范围内的光线被第一滤光片30a吸收的平均比例小于等于50％。It should be noted that the average transmittance mentioned in this application is the average proportion of light passing through the corresponding filter 30 within a specific range. For example, for the visible light band of greater than or equal to 600 nm, the light within this range passes through the third The average ratio of a filter 30a is greater than or equal to 50%. The average absorption rate is the average proportion of light absorbed by the corresponding filter 30 within a specific range. For example, for a visible light band of greater than or equal to 600 nm, the average proportion of light within this range absorbed by the first filter 30a is less than or equal to 50%. .
对于小于600nm的可见光波段，第一滤光片30a的透过率均值小于等于30％，例如，第一滤光片30a的透过率均值可以是30％、27％、24％、20％、15％、10％、8％、4％、或0％，使得第二发光面板10b和第三发光面板10c发射的光束照射到第一入射面21a后能够透过第一滤光片30a的光束尽可能少，减小了其他发光面板照射到第一入射面21a处的光束形成杂散光的可能性，进而减少了投影光机100中的杂散光。For the visible light band less than 600 nm, the average transmittance of the first filter 30a is less than or equal to 30%. For example, the average transmittance of the first filter 30a can be 30%, 27%, 24%, 20%, 15%, 10%, 8%, 4%, or 0%, so that the light beam emitted by the second light-emitting panel 10b and the third light-emitting panel 10c can pass through the first optical filter 30a after irradiating the first incident surface 21a As little as possible, the possibility of stray light being formed by light beams irradiated by other light-emitting panels on the first incident surface 21 a is reduced, thereby reducing stray light in the projection light machine 100 .
对于小于600nm的可见光波段，第一滤光片30a的吸收率均值大于等于70％，例如，第一滤光片30a的吸收率均值可以是70％、73％、76％、80％、85％、90％、92％、96％、或100％，使得第一滤光片30a能够尽可能多地吸收其他发光面板照射到第一滤光片30a处的光束，减小了其他发光面板照射到第一入射面21a处的光束形成杂散光的可能性，进而减少了投影光机100中的杂散光。For the visible light band less than 600 nm, the average absorbance of the first filter 30a is greater than or equal to 70%. For example, the average absorbance of the first filter 30a can be 70%, 73%, 76%, 80%, or 85%. , 90%, 92%, 96%, or 100%, so that the first optical filter 30a can absorb as much light as possible from other luminescent panels irradiating the first optical filter 30a, and reduce the irradiation of other luminous panels to the first optical filter 30a. The light beam at the first incident surface 21a may form stray light, thereby reducing the stray light in the projector 100.
第二滤光片30b用于透过第二发光面板10b发射的光束，第二发光面板10b发射的光束中透过第二滤光片30b的部分，结合第一发光面板10a和第三发光面板10c发射的光束，实现投影光机100的全彩显示。The second filter 30b is used to transmit the light beam emitted by the second light-emitting panel 10b. The part of the light beam emitted by the second light-emitting panel 10b that passes through the second filter 30b is combined with the first light-emitting panel 10a and the third light-emitting panel. The light beam emitted by 10c realizes the full-color display of the projection light machine 100.
第二滤光片30b能够吸收不同于第二发光面板10b所发射的颜色光束，例如，第二滤光片30b吸收第一发光面板10a和第三发光面板10c所发射的光束。类似地，第一二向色反射面23不能对第一发光面板10a发射的光束达到100％的反射率，第一发光面板10a发射的光束中存在一部分光束从第一二向色反射面23透过并照射到第二入射面21b上，设置第二滤光片30b在第二入射面21b处将该部分光束吸收掉，从而不会形成整个投影光机100中的杂散光，有利于提升投影光机100的色准和对比度。The second optical filter 30b can absorb light beams of colors different from those emitted by the second light-emitting panel 10b. For example, the second optical filter 30b absorbs light beams emitted by the first light-emitting panel 10a and the third light-emitting panel 10c. Similarly, the first dichroic reflective surface 23 cannot achieve 100% reflectivity for the light beam emitted by the first light-emitting panel 10a, and part of the light beam emitted by the first light-emitting panel 10a is transmitted through the first dichroic reflective surface 23. passes through and irradiates onto the second incident surface 21b, and a second filter 30b is provided at the second incident surface 21b to absorb this part of the beam, so that stray light in the entire projector 100 will not be formed, which is beneficial to improving projection. Color accuracy and contrast of Optomechanical 100.
类似地，第三发光面板10c发射的光束经合光装置20后可能存在部分光束反射到第二入射面21b处，第二滤光片30b可以将该部分光束吸收掉，以减少投影光机100中的杂散光。Similarly, part of the light beam emitted by the third light-emitting panel 10c may be reflected to the second incident surface 21b after passing through the light combining device 20. The second optical filter 30b may absorb this part of the light beam to reduce the impact of the projection light machine 100. stray light in.
本实施例中，通过第二滤光片30b吸收第一发光面板10a和/或第三发光面板10c发射的并经合光装置20折射后照射到第二入射面21b处的光束，以减小第一发光面板10a和/或第三发光面板10c发射的光束形成杂散光的可能性，减少了投影光机100中的杂散光。In this embodiment, the second filter 30b absorbs the light beam emitted by the first luminescent panel 10a and/or the third luminescent panel 10c and refracted by the light combining device 20 and irradiated to the second incident surface 21b, so as to reduce The possibility of the light beam emitted by the first light emitting panel 10a and/or the third light emitting panel 10c forming stray light reduces the stray light in the projection light machine 100.
对于小于等于480nm的可见光波段，第二滤光片30b的透过率均值大于等于50％，例如，第二滤光片30b的透过率均值可以是50％、66％、71％、75％、78％、80％、85％、92％、95％或100％，在满足第二滤光片30b的透过率均值大于等于50％的前提下，第二滤光片30b对小于等于480nm的可见光波段的透过率均值越大，最终从出射面22出射的第二发光面板10b发射的光束能量越高，保证第二发光面板10b发射的光束尽可能多地能够透过第二滤光片30b，有利于提升投影光机100的色准和对比度。For the visible light band of less than or equal to 480 nm, the average transmittance of the second filter 30b is greater than or equal to 50%. For example, the average transmittance of the second filter 30b can be 50%, 66%, 71%, or 75%. , 78%, 80%, 85%, 92%, 95% or 100%, on the premise that the average transmittance of the second filter 30b is greater than or equal to 50%, the second filter 30b is less than or equal to 480nm. The greater the average transmittance of the visible light band, the higher the energy of the light beam emitted by the second light-emitting panel 10b that finally emerges from the exit surface 22, ensuring that as much of the light beam emitted by the second light-emitting panel 10b can pass through the second filter as possible The piece 30b is beneficial to improving the color accuracy and contrast of the projection light machine 100.
对于小于等于480nm的可见光波段，第二滤光片30b的吸收率均值小于等于50％，例如，第二滤光片30b的吸收率均值可以是50％、34％、29％、25％、22％、20％、15％、8％、5％或0％，在满足第二滤光片30b的吸收率均值小于等于50％的前提下，第二滤光片30b对小于等于480nm的可见光波段的吸收率均值越小，第二发光发面发射的光束被第二滤光片30b吸收的部分就越少，使得第二发光面板10b发射的光束不会被第二滤光片30b吸收过多，从而提高最终从出射面22出射的第二发光面板10b的光束能量，提升投影光机100的色准和对比度等显示效果。For the visible light band of 480 nm or less, the average absorbance of the second filter 30b is less than or equal to 50%. For example, the average absorbance of the second filter 30b can be 50%, 34%, 29%, 25%, 22 %, 20%, 15%, 8%, 5% or 0%, under the premise that the average absorption rate of the second filter 30b is less than or equal to 50%, the second filter 30b is suitable for the visible light band of less than or equal to 480nm. The smaller the average absorption rate is, the less part of the light beam emitted by the second light-emitting surface is absorbed by the second filter 30b, so that the light beam emitted by the second light-emitting panel 10b will not be absorbed too much by the second filter 30b. , thereby increasing the beam energy of the second light-emitting panel 10b that is finally emitted from the exit surface 22, and improving the display effects such as color accuracy and contrast of the projection light machine 100.
对于大于480nm的可见光波段，第二滤光片30b的透过率均值小于等于30％，例如，第二滤光片30b的透过率均值可以是30％、28％、25％、20％、16％、11％、7％、3％、或0％，使得第一发光面板10a和第三发光面板10c发射的光束照射到第二入射面21b后能够透过第二滤光片30b的光束尽可能少，减小了其他发光面板照射到第二入射面21b处的光束形成杂散光的可能性，进而减少了投影光机100中的杂散光。For the visible light band greater than 480 nm, the average transmittance of the second filter 30b is less than or equal to 30%. For example, the average transmittance of the second filter 30b can be 30%, 28%, 25%, 20%, 16%, 11%, 7%, 3%, or 0%, so that the light beams emitted by the first light-emitting panel 10a and the third light-emitting panel 10c can pass through the second optical filter 30b after irradiating the second incident surface 21b. As little as possible, the possibility of the light beams from other light-emitting panels striking the second incident surface 21b forming stray light is reduced, thereby reducing the stray light in the projection light machine 100.
对于大于480nm的可见光波段，第二滤光片30b的吸收率均值大于等于70％，例如，第二滤光片30b的吸收率均值可以是70％、72％、75％、80％、84％、89％、93％、97％、或100％，使得第二滤光片30b能够尽可能多地吸收其他发光面板照射到第二滤光片30b处的光束，减小了其他发光面板照射到第二入射面21b处的光束形成杂散光的可能性，进而减少了投影光机100中的杂散光。For the visible light band greater than 480 nm, the average absorbance of the second filter 30b is greater than or equal to 70%. For example, the average absorbance of the second filter 30b can be 70%, 72%, 75%, 80%, or 84%. , 89%, 93%, 97%, or 100%, so that the second optical filter 30b can absorb as much light as possible from other light-emitting panels that illuminate the second filter 30b, and reduce the amount of light that other light-emitting panels illuminate from the second filter 30b. The possibility of the light beam at the second incident surface 21 b forming stray light is thereby reduced in the projector 100 .
第三滤光片30c用于透过第三发光面板10c发射的光束，第三发光面板10c发射的光束中透过第三滤光片30c的部分，结合第一发光面板10a和第二发光面板10b发射的光束，实现投影光机100的全彩显示。The third optical filter 30c is used to transmit the light beam emitted by the third light-emitting panel 10c. The part of the light beam emitted by the third light-emitting panel 10c that passes through the third optical filter 30c is combined with the first light-emitting panel 10a and the second light-emitting panel. The light beam emitted by 10b realizes the full-color display of the projection light machine 100.
第三滤光片30c能够吸收不同于第三发光面板10c所发射的颜色光束，例如，第三滤光片30c吸收第一发光面板10a和第二发光面板10b所发射的光束。第一滤光片30a和第二滤光片30b不能完全吸收第一发光面板10a和/或第二发光面板10b所发射的光束，仍会存在部分第一发光面板10a和/或第二发光面板10b发射的光束能够通过第一滤光片30a和/或第二滤光片30b反射到第三入射面21c处，造成投影光机100的杂散光。The third optical filter 30c can absorb light beams of colors different from those emitted by the third light-emitting panel 10c. For example, the third optical filter 30c absorbs light beams emitted by the first light-emitting panel 10a and the second light-emitting panel 10b. The first optical filter 30a and the second optical filter 30b cannot completely absorb the light beam emitted by the first light-emitting panel 10a and/or the second light-emitting panel 10b, and there will still be part of the first light-emitting panel 10a and/or the second light-emitting panel. The light beam emitted by 10b can be reflected to the third incident surface 21c through the first filter 30a and/or the second filter 30b, causing stray light of the projector 100.
本实施例中，进一步通过第三滤光片30c吸收第一滤光片30a和/或第二滤光片30b未能吸收的部分光束，减小第一发光面板10a和/或第二发光面板10b发射的光束形成杂散光的可能性，从而减少了投影光机100中的杂散光。In this embodiment, the third optical filter 30c is further used to absorb part of the light beam that the first optical filter 30a and/or the second optical filter 30b cannot absorb, thereby reducing the size of the first light-emitting panel 10a and/or the second light-emitting panel. The possibility of the light beam emitted by 10b forming stray light is reduced, thereby reducing the stray light in the projection light machine 100.
对于大于480nm且小于600nm的可见光波段，第三滤光片30c的透过率均值大于等于50％，例如，第三滤光片30c的透过率均值可以是50％、64％、70％、73％、76％、80％、84％、90％、96％或100％，在满足第三滤光片30c的透过率均值大于等于50％的前提下，第三滤光片30c对大于480nm且小于600nm的可见光波段的透过率均值越大，最终从出射面22出射的第三发光面板10c发射的光束能量越高，保证第三发光面板10c发射的光束尽可能多地能够透过第三滤光片30c，有利于提升投影光机100的色准和对比度。For the visible light band greater than 480nm and less than 600nm, the average transmittance of the third filter 30c is greater than or equal to 50%. For example, the average transmittance of the third filter 30c can be 50%, 64%, 70%, 73%, 76%, 80%, 84%, 90%, 96% or 100%, under the premise that the average transmittance of the third filter 30c is greater than or equal to 50%, the third filter 30c is greater than The greater the average transmittance of the visible light band between 480nm and less than 600nm, the higher the energy of the beam emitted by the third light-emitting panel 10c that finally emerges from the exit surface 22, ensuring that as much of the light beam emitted by the third light-emitting panel 10c can be transmitted through as possible The third filter 30c is beneficial to improving the color accuracy and contrast of the projector 100.
对于大于480nm且小于600nm的可见光波段，第三滤光片30c的吸收率均值小于等于50％，例如，第三滤光片30c的吸收率均值可以是50％、36％、30％、27％、24％、20％、16％、10％、4％或0％，在满足第三滤光片30c的吸收率均值小于等于50％的前提下，第三滤光片30c对大于480nm且小于600nm的可见光波段的吸收率均值越小，第三发光面板10c发射的光束被第三滤光片30c吸收的部分就越少，使得第三发光面板10c发射的光束不会被第三滤光片30c吸收过多，从而提高最终从出射面22出射的第三发光面板10c的光束能量，提升投影光机100的色准和对比度等显示效果。For the visible light band greater than 480 nm and less than 600 nm, the average absorbance of the third filter 30c is less than or equal to 50%. For example, the average absorbance of the third filter 30c may be 50%, 36%, 30%, or 27%. , 24%, 20%, 16%, 10%, 4% or 0%, on the premise that the average absorptivity of the third filter 30c is less than or equal to 50%, the third filter 30c is suitable for wavelengths greater than 480nm and less than The smaller the average absorption rate of the visible light band of 600 nm is, the less part of the light beam emitted by the third light-emitting panel 10c is absorbed by the third filter 30c, so that the light beam emitted by the third light-emitting panel 10c will not be absorbed by the third filter 30c. 30c absorbs too much, thereby increasing the beam energy of the third light-emitting panel 10c that is finally emitted from the exit surface 22, and improving the display effects such as color accuracy and contrast of the projector 100.
对于大于等于600nm的可见光波段以及小于等于480nm的可见光波段，第三滤光片30c的透过率均值小于等于30％，例如，第三滤光片30c的透过率均值可以是30％、26％、23％、20％、14％、12％、10％、5％、或0％，使得第一发光面板10a和第二发光面板10b发射的光束照射到第三入射面21c后能够透过第三滤光片30c的光束尽可能少，减小了其他发光面板照射到第三入射面21c处的光束形成杂散光的可能性，进而减少了投影光机100中的杂散光。For the visible light band of greater than or equal to 600 nm and the visible light band of less than or equal to 480 nm, the average transmittance of the third filter 30c is less than or equal to 30%. For example, the average transmittance of the third filter 30c can be 30%, 26 %, 23%, 20%, 14%, 12%, 10%, 5%, or 0%, so that the light beams emitted by the first light-emitting panel 10a and the second light-emitting panel 10b can pass through after irradiating the third incident surface 21c The third filter 30c emits as little light as possible, which reduces the possibility of stray light being formed by light beams from other light-emitting panels striking the third incident surface 21c, thereby reducing stray light in the projector 100.
对于大于等于600nm的可见光波段以及小于等于480nm的可见光波段，第三滤光片30c的吸收率均值大于等于70％，例如，第三滤光片30c的吸收率均值可以是70％、74％、77％、80％、86％、88％、90％、95％、或100％，使得第三滤光片30c能够尽可能多地吸收其他发光面板照射到第三滤光片30c处的光束，减小了其他发光面板照射到第三入射面21c处的光束形成杂散光的可能性，进而减少了投影光机100中的杂散光。For the visible light band of greater than or equal to 600 nm and the visible light band of less than or equal to 480 nm, the average absorbance of the third filter 30c is greater than or equal to 70%. For example, the average absorbance of the third filter 30c can be 70%, 74%, 77%, 80%, 86%, 88%, 90%, 95%, or 100%, so that the third filter 30c can absorb as much light as possible from other light-emitting panels that illuminate the third filter 30c, This reduces the possibility that light beams from other light-emitting panels irradiating onto the third incident surface 21 c form stray light, thereby reducing stray light in the projector 100 .
亲参阅图8a、图8b、及图8c，投影光机100包括多个发光单元10、合光装置20、与多个发光单元10一一对应的多个滤光件30、与多个发光单元10一一对应的多个透镜阵列50及镜头40，其中，多个发光单元10、合光装置20、与多个发光单元10一一对应的多个滤光件30、与多个发光单元10一一对应的多个滤光件30、及镜头40的设置与图6或图7所示的投影光机100中对应器件的具体设置相同，不同之处在于：在发光单元10和入射面21之间对应设置有一个透镜阵列50，透镜阵列50用于缩小对应发光单元10所发射的光束的发散角，使得照射到合光装置20内的光束反射率较高，有利于提升投影光机100的显示效果。8a, 8b, and 8c, the projector 100 includes a plurality of light-emitting units 10, a light combining device 20, a plurality of filters 30 corresponding to the plurality of light-emitting units 10, and a plurality of light-emitting units. 10 A plurality of lens arrays 50 and lenses 40 in one-to-one correspondence, wherein a plurality of light-emitting units 10, a light combining device 20, a plurality of filters 30 in a one-to-one correspondence with the plurality of light-emitting units 10, and a plurality of light-emitting units 10 The one-to-one arrangement of the multiple filters 30 and the lens 40 is the same as the specific arrangement of the corresponding components in the projection light machine 100 shown in FIG. 6 or FIG. 7 , except that: in the light-emitting unit 10 and the incident surface 21 A lens array 50 is provided correspondingly therebetween. The lens array 50 is used to reduce the divergence angle of the light beam emitted by the corresponding light-emitting unit 10, so that the reflectivity of the light beam irradiated into the light combining device 20 is higher, which is beneficial to improving the projection light machine 100. display effect.
一种实施方式中，如图8a所示，滤光件30贴合在对应的入射面21上，透镜阵列50贴合在发光单元10朝向滤光件30一侧的表面上，例如，第二滤光片30b贴合在第二入射面21b上，透镜阵列50贴合在第二发光面板10b朝向第二滤光片30b一侧的表面，第二发光面板10b发射的光束经透镜阵列50后，光束的发散角缩小，使得照射到第二二向色反射面24时的光束反射率较高，减少光束从第二二向色反射面24透过的部分，有利于提升投影光机100的色准和对比度等显示效果。In one embodiment, as shown in Figure 8a, the filter 30 is attached to the corresponding incident surface 21, and the lens array 50 is attached to the surface of the light-emitting unit 10 facing the filter 30, for example, the second The filter 30b is attached to the second incident surface 21b, and the lens array 50 is attached to the surface of the second light-emitting panel 10b facing the second filter 30b. The light beam emitted by the second light-emitting panel 10b passes through the lens array 50. , the divergence angle of the light beam is reduced, so that the reflectivity of the light beam when it hits the second dichroic reflective surface 24 is higher, and the part of the light beam that passes through the second dichroic reflective surface 24 is reduced, which is beneficial to improving the performance of the projection light machine 100 Display effects such as color accuracy and contrast.
另一种实施方式中，如图8b所示，滤光件30贴合在对应的入射面21上，透镜阵列50替换发光单元10的盖板13，直接通过透镜阵列50作为发光单元10的盖板13对基板11上的主动发光器件12进行封装，使得发光单元10发射的光束通过透镜阵列50减小发散角，提高光束在合光装置20内的反射率，同时，还可以减小投影光机100整体的体积，有利于实现投影光机100的小体积。In another embodiment, as shown in FIG. 8 b , the filter 30 is attached to the corresponding incident surface 21 , the lens array 50 replaces the cover 13 of the light-emitting unit 10 , and the lens array 50 directly serves as the cover of the light-emitting unit 10 . The board 13 encapsulates the active light-emitting device 12 on the substrate 11, so that the light beam emitted by the light-emitting unit 10 reduces the divergence angle through the lens array 50, improves the reflectivity of the light beam in the light combining device 20, and at the same time, can also reduce the projection light The overall volume of the projector 100 is conducive to achieving a small size of the projection light machine 100 .
又一种实施方式中，如图8c所示，滤光件30作为发光单元10的盖板13盖合在发光单元10的基板11上，透镜阵列50贴合在滤光件30朝向入射面21一侧的表面上。In another embodiment, as shown in FIG. 8c , the filter 30 serves as the cover plate 13 of the light-emitting unit 10 and covers the substrate 11 of the light-emitting unit 10 , and the lens array 50 is attached to the filter 30 toward the incident surface 21 on one side of the surface.
在本申请中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。In this application, unless otherwise clearly stated and limited, the terms "connection", "fixing", etc. should be understood in a broad sense. For example, "fixing" can be a fixed connection, a detachable connection, or an integral body; it can It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
本文中涉及的第一、第二以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请的范围。The first, second and various numerical numbers involved in this article are only for convenience of description and are not used to limit the scope of the present application.
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.
以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。The above embodiments are only used to illustrate the technical solutions of the present application, but are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments. Modifications may be made to the recorded technical solutions, or equivalent substitutions may be made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311638473.XACN117666266A (en) | 2023-11-30 | 2023-11-30 | Projection machines and electronic equipment |
| PCT/CN2024/135069WO2025113529A1 (en) | 2023-11-30 | 2024-11-27 | Projection light machine and electronic device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311638473.XACN117666266A (en) | 2023-11-30 | 2023-11-30 | Projection machines and electronic equipment |
| Publication Number | Publication Date |
|---|---|
| CN117666266Atrue CN117666266A (en) | 2024-03-08 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311638473.XAPendingCN117666266A (en) | 2023-11-30 | 2023-11-30 | Projection machines and electronic equipment |
| Country | Link |
|---|---|
| CN (1) | CN117666266A (en) |
| WO (1) | WO2025113529A1 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025113529A1 (en)* | 2023-11-30 | 2025-06-05 | 华为技术有限公司 | Projection light machine and electronic device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230972A1 (en)* | 2002-06-12 | 2003-12-18 | Eastman Kodak Company | Oled display having color filters for improving contrast |
| CN101446684A (en)* | 2007-11-29 | 2009-06-03 | 索尼株式会社 | Image display apparatus |
| CN103900020A (en)* | 2012-12-26 | 2014-07-02 | 深圳市光峰光电技术有限公司 | Light emitting device and stage lamp system |
| CN110308562A (en)* | 2018-03-27 | 2019-10-08 | 精工爱普生株式会社 | Optical unit and display device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117666266A (en)* | 2023-11-30 | 2024-03-08 | 华为技术有限公司 | Projection machines and electronic equipment |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230972A1 (en)* | 2002-06-12 | 2003-12-18 | Eastman Kodak Company | Oled display having color filters for improving contrast |
| CN101446684A (en)* | 2007-11-29 | 2009-06-03 | 索尼株式会社 | Image display apparatus |
| CN103900020A (en)* | 2012-12-26 | 2014-07-02 | 深圳市光峰光电技术有限公司 | Light emitting device and stage lamp system |
| CN110308562A (en)* | 2018-03-27 | 2019-10-08 | 精工爱普生株式会社 | Optical unit and display device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025113529A1 (en)* | 2023-11-30 | 2025-06-05 | 华为技术有限公司 | Projection light machine and electronic device |
| Publication number | Publication date |
|---|---|
| WO2025113529A1 (en) | 2025-06-05 |
| Publication | Publication Date | Title |
|---|---|---|
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