技术领域Technical Field
本申请涉及显示领域，尤其是涉及一种多视点显示系统。The present application relates to the field of display, and in particular to a multi-viewpoint display system.
背景技术Background technique
由于光学技术的快速发展，许多显示装置已经逐渐应用到日常生活中。其中，投影装置具有大尺寸显示的优点，被视为显示装置的重要发展趋势。Due to the rapid development of optical technology, many display devices have been gradually applied to daily life. Among them, projection devices have the advantage of large-size display and are regarded as an important development trend of display devices.
现有技术中，投影装置是观看者与投影机位于投影屏幕的两侧或同侧，通过投影机从投影屏幕上透射或反射出来的投影光线来观看图像。In the prior art, in a projection device, a viewer and a projector are located on two sides or the same side of a projection screen, and view images through projection light transmitted or reflected from the projection screen by the projector.
然而，投影屏幕虽然具有较大观看视角，但不同位置的观看者通过投影屏幕观看的仍为同一画面，无法使不同位置的观看者观看互不影响的多个投影画面，无法满足多元化观看需求。However, although the projection screen has a large viewing angle, viewers at different positions still view the same picture through the projection screen, and viewers at different positions cannot view multiple projection pictures that do not affect each other, and the diversified viewing needs cannot be met.
实用新型内容Utility Model Content
本申请主要解决的技术问题是提供一种多视点显示系统，能够解决现有投影设备无法满足多元化观看需求的问题。The main technical problem solved by the present application is to provide a multi-viewpoint display system, which can solve the problem that existing projection equipment cannot meet diversified viewing needs.
为解决上述技术问题，本申请采用的一个技术方案是提供一种多视点显示系统，包括：投影屏幕；其中，投影屏幕的出光面设置有扩散层；扩散层包括多个微结构单元，每个微结构单元的延伸方向为第一方向，第二方向与第一方向垂直，每个微结构单元沿第一方向的特征尺寸大于沿第二方向的特征尺寸；其中，扩散层包括第一方向扩散角与第二方向扩散角；投影机组，设置在投影屏幕的入光面的一侧，包括至少两个投影机；其中，多个投影机用于放映不同视点场景；其中，任意两个投影机的投影光线所形成的夹角大于扩散层的第一方向扩散角。In order to solve the above technical problems, a technical solution adopted in the present application is to provide a multi-viewpoint display system, comprising: a projection screen; wherein a diffusion layer is provided on the light-emitting surface of the projection screen; the diffusion layer comprises a plurality of microstructure units, the extension direction of each microstructure unit is a first direction, the second direction is perpendicular to the first direction, and the characteristic dimension of each microstructure unit along the first direction is greater than the characteristic dimension along the second direction; wherein the diffusion layer comprises a diffusion angle in the first direction and a diffusion angle in the second direction; a projector group, arranged on one side of the light-entering surface of the projection screen, comprising at least two projectors; wherein the plurality of projectors are used to project scenes from different viewpoints; wherein the angle formed by the projection light rays of any two projectors is greater than the diffusion angle in the first direction of the diffusion layer.
其中，第一方向扩散角为0～10°，第二方向扩散角为0～60°。The diffusion angle in the first direction is 0-10°, and the diffusion angle in the second direction is 0-60°.
其中，扩散层包括交错排布的多个微结构单元，且多个微结构单元之间无固定间隔；其中，微结构单元呈山峰状，且每个微结构单元在投影屏幕的平面内的截面形状为椭圆形或纺锤形；其中，椭圆形或纺锤形的长轴平行于第一方向，椭圆形或纺锤形的短轴平行于第二方向。The diffusion layer includes a plurality of microstructure units arranged in an alternating manner, and there is no fixed interval between the plurality of microstructure units; the microstructure units are peak-shaped, and the cross-sectional shape of each microstructure unit in the plane of the projection screen is an ellipse or a spindle; the long axis of the ellipse or the spindle is parallel to the first direction, and the short axis of the ellipse or the spindle is parallel to the second direction.
其中，多个微结构单元分别对应的特征尺寸不同，且多个特征尺寸随机变化并符合高斯分布；其中，特征尺寸包括长轴、短轴与厚度。Among them, the characteristic dimensions corresponding to the multiple microstructure units are different, and the multiple characteristic dimensions vary randomly and conform to the Gaussian distribution; wherein the characteristic dimensions include the major axis, the minor axis and the thickness.
其中，多个微结构单元的长轴的平均长度为10～1000微米；多个微结构单元的长轴与短轴的平均比值为1:1～1000:1；多个微结构单元的平均厚度为2～10微米。The average length of the long axis of the multiple microstructure units is 10 to 1000 micrometers; the average ratio of the long axis to the short axis of the multiple microstructure units is 1:1 to 1000:1; and the average thickness of the multiple microstructure units is 2 to 10 micrometers.
其中，投影屏幕的出光面设置有柱面光栅，扩散层设置在柱面光栅上。Wherein, a cylindrical grating is arranged on the light-emitting surface of the projection screen, and a diffusion layer is arranged on the cylindrical grating.
其中，柱面光栅的棱柱周期大于扩散层中多个微结构单元的特征尺寸。The prism period of the cylindrical grating is greater than the characteristic size of a plurality of microstructure units in the diffusion layer.
其中，棱柱周期小于或等于预设值。The prism period is less than or equal to a preset value.
其中，投影屏幕为透射式屏幕；其中，出光面与入光面为相对设置的两侧表面。The projection screen is a transmissive screen; the light emitting surface and the light incident surface are two side surfaces arranged opposite to each other.
其中，投影屏幕为反射式屏幕；其中，出光面与入光面为同一表面。The projection screen is a reflective screen; the light emitting surface and the light incident surface are the same surface.
本申请的有益效果是：区别于现有技术，本申请提供多视点显示系统，通过设置包括至少两个投影机的投影机组，能够通过多个投影机在投影屏幕上形成多个不同的视点场景，以使不同位置的观看者观看不同的投影画面，从而满足多视需求；同时，通过在投影屏幕的出光面设置包括多个微结构单元的扩散层，并通过扩散层控制投影画面的扩散角度，能够使同一投影画面在不同观看位置形成较大的对比度，以确保观看者处于不同视点场景对应的观看位置内才能观看到对应的投影画面，从而实现防窥的效果；进一步地，通过使任意两个投影机的投影光线所形成的夹角大于扩散层的第一方向扩散角，能够消除多个投影画面之间的串扰，从而避免多个投影画面之间互相影响，继而满足多元化的观看需求。The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a multi-viewpoint display system, which, by providing a projector group including at least two projectors, can form a plurality of different viewpoint scenes on the projection screen through a plurality of projectors, so that viewers at different positions can view different projection images, thereby meeting multi-viewing requirements; at the same time, by providing a diffusion layer including a plurality of microstructure units on the light-emitting surface of the projection screen, and controlling the diffusion angle of the projection image through the diffusion layer, the same projection image can form a greater contrast at different viewing positions, thereby ensuring that the viewer can view the corresponding projection image only when he is in the viewing position corresponding to the different viewpoint scenes, thereby achieving an anti-peeping effect; further, by making the angle formed by the projection light of any two projectors greater than the first direction diffusion angle of the diffusion layer, crosstalk between a plurality of projection images can be eliminated, thereby avoiding mutual influence between a plurality of projection images, thereby meeting diversified viewing requirements.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
图1是本申请多视点显示系统第一实施方式的结构示意图；FIG1 is a schematic structural diagram of a first embodiment of a multi-viewpoint display system of the present application;
图2是图1中投影屏幕水平扩散效果示意图；FIG2 is a schematic diagram of the horizontal diffusion effect of the projection screen in FIG1 ;
图3是图1中扩散层的微观结构图；FIG3 is a microstructure diagram of the diffusion layer in FIG1 ;
图4是图1中扩散层的等高线图；FIG4 is a contour map of the diffusion layer in FIG1 ;
图5是本申请多视点显示系统第二实施方式的结构示意图；FIG5 is a schematic diagram of the structure of a second embodiment of the multi-viewpoint display system of the present application;
图6是本申请多视点显示系统第三实施方式的结构示意图；FIG6 is a schematic structural diagram of a third embodiment of the multi-viewpoint display system of the present application;
图7是图6中投影屏幕A区一实施方式的放大结构示意图。FIG. 7 is an enlarged structural schematic diagram of an implementation manner of area A of the projection screen in FIG. 6 .
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，均属于本申请保护的范围。The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
在本申请实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上文清楚地表示其他含义，“多种”一般包含至少两种，但是不排除包含至少一种的情况。The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "said", and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless otherwise clearly indicated above, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.
应当理解，本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。It should be understood that the term "and/or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
应当理解，本文中使用的术语“包括”、“包含”或者其他任何变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should be understood that the terms "include", "comprises" or any other variations used herein are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements.
投影屏幕虽然具有较大观看视角，但不同位置的观看者通过投影屏幕观看的仍为同一画面，无法使不同位置的观看者观看互不影响的多个投影画面，无法满足多元化观看需求。Although the projection screen has a large viewing angle, viewers at different positions still view the same picture through the projection screen, and it is impossible for viewers at different positions to view multiple projection pictures that do not affect each other, and it is impossible to meet diversified viewing needs.
基于上述情况，本申请提供一种多视点显示系统，能够解决现有投影设备无法满足多元化观看需求的问题。Based on the above situation, the present application provides a multi-viewpoint display system that can solve the problem that existing projection equipment cannot meet diversified viewing needs.
本申请所提供的多视点显示系统，包括：投影屏幕；其中，投影屏幕的出光面设置有扩散层；扩散层包括多个微结构单元，每个微结构单元的延伸方向为第一方向，第二方向与第一方向垂直，每个微结构单元沿第一方向的特征尺寸大于沿第二方向的特征尺寸；其中，扩散层包括第一方向扩散角与第二方向扩散角；投影机组，设置在投影屏幕的入光面的一侧，包括至少两个投影机；其中，多个投影机用于放映不同视点场景；其中，任意两个投影机的投影光线所形成的夹角大于扩散层的第一方向扩散角。通过设置投影机组，能够通过多个投影机在投影屏幕上形成多个不同的视点场景，以使不同位置的观看者观看不同的投影画面，从而满足多视需求。同时，通过在投影屏幕的出光面设置包括多个微结构单元的扩散层，并通过扩散层控制投影画面的扩散角度，能够使同一投影画面在不同观看位置形成较大的对比度，以确保观看者处于不同视点场景对应的预设观看位置内才能观看到对应的投影画面，从而实现防窥的效果。进一步地，通过使任意两个投影机的投影光线所形成的夹角大于扩散层的第一方向扩散角，能够消除多个投影画面之间的串扰，从而避免多个投影画面之间互相影响，继而满足多元化的观看需求。The multi-viewpoint display system provided by the present application includes: a projection screen; wherein a diffusion layer is provided on the light-emitting surface of the projection screen; the diffusion layer includes a plurality of microstructure units, each microstructure unit extends in a first direction, the second direction is perpendicular to the first direction, and the characteristic dimension of each microstructure unit along the first direction is greater than the characteristic dimension along the second direction; wherein the diffusion layer includes a diffusion angle in the first direction and a diffusion angle in the second direction; a projector group is provided on one side of the light-entering surface of the projection screen, and includes at least two projectors; wherein the plurality of projectors are used to project scenes from different viewpoints; wherein the angle formed by the projection light beams of any two projectors is greater than the diffusion angle in the first direction of the diffusion layer. By providing the projector group, a plurality of different viewpoint scenes can be formed on the projection screen through a plurality of projectors, so that viewers at different positions can view different projection images, thereby meeting the multi-viewing requirements. At the same time, by providing a diffusion layer including a plurality of microstructure units on the light-emitting surface of the projection screen, and controlling the diffusion angle of the projection image through the diffusion layer, the same projection image can form a greater contrast at different viewing positions, so as to ensure that the viewer can view the corresponding projection image only when he is in the preset viewing position corresponding to the different viewpoint scenes, thereby achieving the anti-peeping effect. Furthermore, by making the angle formed by the projection lights of any two projectors greater than the first direction diffusion angle of the diffusion layer, crosstalk between multiple projection images can be eliminated, thereby avoiding mutual influence between the multiple projection images and satisfying diversified viewing needs.
为了说明本申请多视点显示系统的具体结构，请参阅图1，图1是本申请多视点显示系统第一实施方式的结构示意图。To illustrate the specific structure of the multi-view display system of the present application, please refer to FIG. 1 , which is a schematic diagram of the structure of the first embodiment of the multi-view display system of the present application.
本实施方式中，多视点显示系统100包括投影屏幕10与投影机组20。其中，投影屏幕10的出光面12设置有扩散层(图未示)，扩散层包括多个微结构单元，每个微结构单元的延伸方向为第一方向，第二方向与第一方向垂直，每个微结构单元沿第一方向的特征尺寸大于沿第二方向的特征尺寸，扩散层包括第一方向扩散角α与第二方向扩散角。投影机组20设置在投影屏幕10的入光面11的一侧，包括第一投影机21与第二投影机22。其中，第一投影机21与第二投影机22用于放映不同视点场景。其中，第一投影机21与第二投影机22的投影光线所形成的夹角γ大于第一方向扩散角α。In this embodiment, the multi-viewpoint display system 100 includes a projection screen 10 and a projector group 20. The light-emitting surface 12 of the projection screen 10 is provided with a diffusion layer (not shown), the diffusion layer includes a plurality of microstructure units, the extension direction of each microstructure unit is a first direction, the second direction is perpendicular to the first direction, the characteristic dimension of each microstructure unit along the first direction is greater than the characteristic dimension along the second direction, and the diffusion layer includes a first direction diffusion angle α and a second direction diffusion angle. The projector group 20 is arranged on one side of the light-incident surface 11 of the projection screen 10, and includes a first projector 21 and a second projector 22. The first projector 21 and the second projector 22 are used to project scenes from different viewpoints. The angle γ formed by the projection light of the first projector 21 and the second projector 22 is greater than the first direction diffusion angle α.
本实施方式中，投影屏幕10为透射式屏幕，出光面12与入光面11为相对设置的两侧表面，第一投影机21与第二投影机22的投影光线射到投影屏幕10的入光面11，由投影屏幕10的出光面12射出，第一投影机21、第二投影机22与第一观看位置31、第二投影机22分别位于投影屏幕10的两侧。In this embodiment, the projection screen 10 is a transmissive screen, and the light exiting surface 12 and the light incident surface 11 are two side surfaces arranged opposite to each other. The projection light of the first projector 21 and the second projector 22 is incident on the light incident surface 11 of the projection screen 10 and is emitted from the light exiting surface 12 of the projection screen 10. The first projector 21, the second projector 22 and the first viewing position 31, the second projector 22 are respectively located on both sides of the projection screen 10.
本实施方式中，第一方向为投影屏幕10的水平方向，也即投影画面的左右方向。第二方向为投影屏幕10的垂直方向，也即投影画面的上下方向。In this embodiment, the first direction is the horizontal direction of the projection screen 10, that is, the left-right direction of the projection image, and the second direction is the vertical direction of the projection screen 10, that is, the up-down direction of the projection image.
本实施方式中，投影屏幕10通过扩散层中的多个微结构单元实现投影光线的扩散效果。第一方向扩散角α为扩散层的水平扩散角，其定义为水平亮度分布下降的1/2峰值处。第二方向扩散角为扩散层的垂直扩散角，其定义为垂直亮度分布下降的1/2峰值处。In this embodiment, the projection screen 10 achieves the diffusion effect of the projection light through a plurality of microstructure units in the diffusion layer. The first direction diffusion angle α is the horizontal diffusion angle of the diffusion layer, which is defined as the 1/2 peak value where the horizontal brightness distribution decreases. The second direction diffusion angle is the vertical diffusion angle of the diffusion layer, which is defined as the 1/2 peak value where the vertical brightness distribution decreases.
其中，观看视角包括水平方向和垂直方向，水平方向为多视角分布的方向，即不同观看位置的分布方向，垂直方向为高度分布的方向，即不同身高的分布方向。The viewing angle includes a horizontal direction and a vertical direction. The horizontal direction is the direction of multi-view distribution, that is, the distribution direction of different viewing positions, and the vertical direction is the direction of height distribution, that is, the distribution direction of different heights.
其中，第一观看位置31与第二观看位置32沿水平方向分布，且第一观看位置31位于第一投影机21的投影光线通过投影屏幕10扩散所形成的第一方向扩散角α的范围内，第二观看位置32位于第二投影机22的投影光线通过投影屏幕10扩散所形成的第一方向扩散角α的范围内。Among them, the first viewing position 31 and the second viewing position 32 are distributed in the horizontal direction, and the first viewing position 31 is located within the range of the first direction diffusion angle α formed by the projection light of the first projector 21 diffusing through the projection screen 10, and the second viewing position 32 is located within the range of the first direction diffusion angle α formed by the projection light of the second projector 22 diffusing through the projection screen 10.
其中，第一观看位置31用于观看第一投影机21在投影屏幕10上形成的第一投影画面，第二观看位置32用于观看第二投影机22在投影屏幕10上形成的第二投影画面。其中，第一投影画面与第二投影画面为不同的投影画面。The first viewing position 31 is used to view a first projection image formed by the first projector 21 on the projection screen 10, and the second viewing position 32 is used to view a second projection image formed by the second projector 22 on the projection screen 10. The first projection image and the second projection image are different projection images.
具体地，请参阅图2，图2是图1中投影屏幕水平扩散效果示意图。对于第一投影画面而言，第一观看位置31的观看亮度为峰值～1/2峰值之间，第二观看位置32的观看亮度显著低于1/2峰值，观看者在第一观看位置31能够看到较为清晰的第一投影画面，在第二观看位置32则无法看清第一投影画面。同理，对于第二投影画面而言，第二观看位置32的观看亮度为峰值～1/2峰值之间，第一观看位置31的观看亮度显著低于1/2峰值，观看者在第二观看位置32能够看到较为清晰的第二投影画面，在第一观看位置31则无法看清第二投影画面。Specifically, please refer to FIG. 2 , which is a schematic diagram of the horizontal diffusion effect of the projection screen in FIG. 1 . For the first projection picture, the viewing brightness at the first viewing position 31 is between the peak value and 1/2 of the peak value, and the viewing brightness at the second viewing position 32 is significantly lower than 1/2 of the peak value. The viewer can see the first projection picture more clearly at the first viewing position 31, but cannot see the first projection picture clearly at the second viewing position 32. Similarly, for the second projection picture, the viewing brightness at the second viewing position 32 is between the peak value and 1/2 of the peak value, and the viewing brightness at the first viewing position 31 is significantly lower than 1/2 of the peak value. The viewer can see the second projection picture more clearly at the second viewing position 32, but cannot see the second projection picture clearly at the first viewing position 31.
一些实施方式中，第一方向扩散角α为0～10°，第二方向扩散角为0～60°。其中，在水平方向上超出第一方向扩散角α的范围(即超出第一观看位置31或第二观看位置32)或在垂直方向上超出第二方向扩散角的范围(即身高过矮或过高)，投影画面基本不可见。In some embodiments, the diffusion angle α in the first direction is 0 to 10°, and the diffusion angle in the second direction is 0 to 60°. If the diffusion angle α in the first direction is exceeded in the horizontal direction (i.e., exceeded the first viewing position 31 or the second viewing position 32) or exceeded the diffusion angle in the second direction in the vertical direction (i.e., the height is too short or too tall), the projection image is basically invisible.
可以理解地，第一方向扩散角α的范围较小，能够在水平方向上较好地实现多视分布，第二方向扩散角的范围较大，能够满足不同身高的观看者的观看需求。It can be understood that the range of the diffusion angle α in the first direction is relatively small, and can better realize multi-view distribution in the horizontal direction, while the range of the diffusion angle in the second direction is relatively large, and can meet the viewing needs of viewers of different heights.
可以理解地，由于不同投影画面在不同的观看位置产生了较大的对比度，因而可以确保观看者处于不同视点场景对应的观看位置内才能观看到对应的投影画面，从而不仅满足了多视需求，还保护了观看者的隐私需求，实现了防窥效果。It can be understood that since different projection images produce a large contrast at different viewing positions, it can ensure that the viewer can view the corresponding projection image only when he is in the viewing position corresponding to the different viewpoint scenes, thereby not only meeting the multi-viewing needs, but also protecting the viewer's privacy needs and achieving an anti-peeping effect.
本实施方式中，投影屏幕10的扩散层包括交错排布的多个微结构单元其中，微结构单元呈山峰状，且每个微结构单元在投影屏幕10的平面内的截面形状为椭圆形或纺锤形。其中，椭圆形或纺锤形的长轴平行于第一方向，椭圆形或纺锤形的短轴平行于第二方向。In this embodiment, the diffusion layer of the projection screen 10 includes a plurality of staggered microstructure units, wherein the microstructure units are peak-shaped, and the cross-sectional shape of each microstructure unit in the plane of the projection screen 10 is an ellipse or a spindle, wherein the long axis of the ellipse or the spindle is parallel to the first direction, and the short axis of the ellipse or the spindle is parallel to the second direction.
具体地，请参阅图3与图4，图3是图1中扩散层的微观结构图，图4是图1中扩散层的等高线图。Specifically, please refer to FIG. 3 and FIG. 4 , FIG. 3 is a microstructure diagram of the diffusion layer in FIG. 1 , and FIG. 4 is a contour diagram of the diffusion layer in FIG. 1 .
本实施方式中，多个微结构单元分别对应的特征尺寸不同，且多个特征尺寸随机变化并符合高斯分布。其中，特征尺寸包括长轴、短轴与厚度。扩散层的多个微结构单元的扩散效果为椭圆高斯扩散，即在水平方向和垂直方向上的光分布均符合高斯分布特征，其特征尺寸中短轴的分布特征对应宏观上水平方向的分布特征。In this embodiment, the characteristic dimensions corresponding to the multiple microstructure units are different, and the multiple characteristic dimensions vary randomly and conform to the Gaussian distribution. Among them, the characteristic dimensions include the major axis, the minor axis and the thickness. The diffusion effect of the multiple microstructure units of the diffusion layer is elliptical Gaussian diffusion, that is, the light distribution in the horizontal and vertical directions conforms to the Gaussian distribution characteristics, and the distribution characteristics of the minor axis in the characteristic dimensions correspond to the distribution characteristics in the horizontal direction on a macro scale.
其中，每个微结构单元沿第一方向的特征尺寸即为长轴，每个微结构单元沿第二方向的特征尺寸即为短轴。The characteristic dimension of each microstructure unit along the first direction is the long axis, and the characteristic dimension of each microstructure unit along the second direction is the short axis.
一些实施方式中，多个微结构单元的长轴的平均长度为10～1000微米，多个微结构单元的长轴与短轴的平均比值为1:1～1000:1，多个微结构单元的平均厚度为2～10微米。In some embodiments, the average length of the long axis of the plurality of microstructure units is 10 to 1000 micrometers, the average ratio of the long axis to the short axis of the plurality of microstructure units is 1:1 to 1000:1, and the average thickness of the plurality of microstructure units is 2 to 10 micrometers.
一些实施方式中，多个微结构单元之间无固定间隔，排布无周期特征，在宏观上呈现无周期性边界。可以理解地，随机交错排布可以避免屏幕上出现周期性的亮斑，从而提高投影屏幕10的显示效果。In some embodiments, there is no fixed interval between the multiple microstructure units, the arrangement has no periodic characteristics, and there is no periodic boundary on a macroscopic level. It can be understood that the random staggered arrangement can avoid periodic bright spots on the screen, thereby improving the display effect of the projection screen 10.
一些实施方式中，投影屏幕10的雾度大于70％，以不能看到投影机的亮度为宜。投影屏幕10的屏幕透过率大于80％，以使投影光线能更好地射出。In some embodiments, the haze of the projection screen 10 is greater than 70%, preferably so that the brightness of the projector cannot be seen. The screen transmittance of the projection screen 10 is greater than 80%, so that the projection light can be better emitted.
本实施方式中，第一投影机21与第二投影机22的投影光线所形成的夹角γ大于第一方向扩散角α。在一个具体的实施场景中，扩散层的第一方向扩散角α为4°，第一投影机21与第二投影机22的投影光线所形成的夹角γ为60°。在另一个具体的实施场景中，扩散层的第一方向扩散角α为7°，第一投影机21与第二投影机22的投影光线所形成的夹角γ为65°。In this embodiment, the angle γ formed by the projection light of the first projector 21 and the second projector 22 is greater than the first direction diffusion angle α. In a specific implementation scenario, the first direction diffusion angle α of the diffusion layer is 4°, and the angle γ formed by the projection light of the first projector 21 and the second projector 22 is 60°. In another specific implementation scenario, the first direction diffusion angle α of the diffusion layer is 7°, and the angle γ formed by the projection light of the first projector 21 and the second projector 22 is 65°.
现有技术中，一般通过复杂的光栅、透镜等结构实现光线扩散，以及通过在投影屏幕上设置多个子屏幕来实现分区显示，以消除不同画面之间的串扰。In the prior art, light diffusion is generally achieved through complex structures such as gratings and lenses, and partitioned display is achieved by setting up multiple sub-screens on the projection screen to eliminate crosstalk between different images.
区别于现有技术，本实施方式通过扩散层就能控制投影画面的扩散角度，以及通过使第一投影机21与第二投影机22的投影光线所形成的夹角γ大于第一方向扩散角α，就能够消除第一投影画面与第二投影画面之间的串扰，避免多个投影画面之间互相影响，无需进行分区设置，降低了投影屏幕10的体积，从而降低了多视点显示系统100的设计难度以及制备成本。Different from the prior art, this embodiment can control the diffusion angle of the projection picture through the diffusion layer, and by making the angle γ formed by the projection light of the first projector 21 and the second projector 22 greater than the diffusion angle α in the first direction, it is possible to eliminate the crosstalk between the first projection picture and the second projection picture, avoid mutual influence between multiple projection pictures, and do not need to be partitioned, thereby reducing the volume of the projection screen 10, thereby reducing the design difficulty and preparation cost of the multi-viewpoint display system 100.
进一步地，本实施方式中，第一投影机21与第二投影机22的投影光线在夹角满足要求的情况下，可以沿着水平方向任意摆放，仅需保证投影于投影屏幕10上的第一投影画面或第二投影画面在第一观看位置31或第二观看位置32为正常画面，且无明显畸变、失真即可。Furthermore, in the present embodiment, the projection light of the first projector 21 and the second projector 22 can be arbitrarily placed in the horizontal direction when the angle meets the requirements. It is only necessary to ensure that the first projection picture or the second projection picture projected on the projection screen 10 is a normal picture at the first viewing position 31 or the second viewing position 32 without obvious aberration or distortion.
本实施方式中，第一投影机21与第二投影机22可以是正投、短焦、超短焦投影机中的任一种，也可以是特殊设计的投影机，本申请对此不作限定。In this embodiment, the first projector 21 and the second projector 22 can be any one of front projection, short-throw, and ultra-short-throw projectors, or can be specially designed projectors, which is not limited in this application.
可以理解地，本实施方式对投影机的类型、分布位置(例如相互之间的间隔、与投影屏幕的距离、入射光角度)几乎无要求，在任意两个投影机的投影光线所形成的夹角大于扩散层的第一方向扩散角的情况下，入射光从任意角度入射均能实现同样的显示效果，因而多视点显示系统100具有较高的灵活性与通用性。It can be understood that the present embodiment has almost no requirements on the type and distribution position of the projectors (e.g., the spacing between them, the distance from the projection screen, and the angle of the incident light). When the angle formed by the projection lights of any two projectors is greater than the first-direction diffusion angle of the diffusion layer, the incident light can achieve the same display effect from any angle, and thus the multi-viewpoint display system 100 has high flexibility and versatility.
请参阅图5，图5是本申请多视点显示系统第二实施方式的结构示意图。Please refer to FIG. 5 , which is a schematic diagram of the structure of a second embodiment of the multi-viewpoint display system of the present application.
本实施方式中，多视点显示系统200包括投影屏幕10与投影机组20。其中，投影屏幕10的出光面12设置有扩散层(图未示)，扩散层包括第一方向扩散角与第二方向扩散角，且第一方向与第二方向垂直。投影机组20设置在投影屏幕10的入光面11的一侧，包括第一投影机21与第二投影机22。其中，第一投影机21与第二投影机22用于放映不同视点场景。其中，第一投影机21与第二投影机22的投影光线所形成的夹角γ大于第一方向扩散角。In this embodiment, the multi-viewpoint display system 200 includes a projection screen 10 and a projector group 20. The light exiting surface 12 of the projection screen 10 is provided with a diffusion layer (not shown), and the diffusion layer includes a first direction diffusion angle and a second direction diffusion angle, and the first direction is perpendicular to the second direction. The projector group 20 is arranged on one side of the light incident surface 11 of the projection screen 10, and includes a first projector 21 and a second projector 22. The first projector 21 and the second projector 22 are used to project scenes from different viewpoints. The angle γ formed by the projection light of the first projector 21 and the second projector 22 is greater than the first direction diffusion angle.
以下仅对本实施方式与上述实施方式不同的部分进行说明。Only the parts of this embodiment that are different from the above-mentioned embodiment will be described below.
本实施方式中，投影屏幕10为反射式屏幕。其中，出光面12与入光面11为同一表面，第一投影机21、第二投影机22与第一观看位置31、第二投影机22位于投影屏幕10的同一侧。In this embodiment, the projection screen 10 is a reflective screen, wherein the light emitting surface 12 and the light incident surface 11 are the same surface, and the first projector 21 , the second projector 22 and the first viewing position 31 , the second projector 22 are located on the same side of the projection screen 10 .
其中，第一观看位置31对应第二投影机22的投影光线入射方向，第二观看位置32对应第一投影机21的投影光线入射方向。The first viewing position 31 corresponds to the incident direction of the projection light of the second projector 22 , and the second viewing position 32 corresponds to the incident direction of the projection light of the first projector 21 .
本实施方式中，投影屏幕10可以为不透光材料或透光材料，本申请对此不作限定。In this embodiment, the projection screen 10 can be made of opaque material or translucent material, which is not limited in this application.
在一个具体的实施场景中，投影屏幕10为不透光材料，扩散层表面反射投影光线。在另一个具体的实施场景中，投影屏幕10为透光材料，在屏幕背面(即与出光面12相对设置的一侧表面)增设吸光层，以避免底面的漫反射。In one specific implementation scenario, the projection screen 10 is made of opaque material, and the surface of the diffusion layer reflects the projection light. In another specific implementation scenario, the projection screen 10 is made of translucent material, and a light absorbing layer is added to the back of the screen (i.e., the side surface opposite to the light emitting surface 12) to avoid diffuse reflection from the bottom surface.
本实施方式中，投影屏幕10的屏幕反射率大于80％。In this embodiment, the screen reflectivity of the projection screen 10 is greater than 80%.
可以理解地，本申请的多视点显示系统对投影屏幕与投影机的类型不作限定，能够灵活地适应不同类型的投影设备，而无需重新设计元件，从而进一步提升了多视点显示系统的通用性。It can be understood that the multi-viewpoint display system of the present application does not limit the types of projection screens and projectors, and can flexibly adapt to different types of projection devices without redesigning components, thereby further improving the versatility of the multi-viewpoint display system.
请参阅图6与图7，图6是本申请多视点显示系统第三实施方式的结构示意图，图7是图6中投影屏幕A区一实施方式的放大结构示意图。Please refer to FIG. 6 and FIG. 7 . FIG. 6 is a schematic structural diagram of a third embodiment of the multi-viewpoint display system of the present application, and FIG. 7 is an enlarged schematic structural diagram of an embodiment of an area A of the projection screen in FIG. 6 .
本实施方式中，多视点显示系统300包括投影屏幕10与投影机组20。其中，投影屏幕10的出光面12设置有扩散层50，扩散层50包括第一方向扩散角与第二方向扩散角，且第一方向与第二方向垂直。投影机组20设置在投影屏幕10的入光面11的一侧，包括第一投影机21与第二投影机22。其中，第一投影机21与第二投影机22用于放映不同视点场景。其中，第一投影机21与第二投影机22的投影光线所形成的夹角γ大于第一方向扩散角。In this embodiment, the multi-viewpoint display system 300 includes a projection screen 10 and a projector group 20. The light exiting surface 12 of the projection screen 10 is provided with a diffusion layer 50, and the diffusion layer 50 includes a first direction diffusion angle and a second direction diffusion angle, and the first direction is perpendicular to the second direction. The projector group 20 is arranged on one side of the light incident surface 11 of the projection screen 10, and includes a first projector 21 and a second projector 22. The first projector 21 and the second projector 22 are used to project scenes from different viewpoints. The angle γ formed by the projection light of the first projector 21 and the second projector 22 is greater than the first direction diffusion angle.
以下仅对本实施方式与上述实施方式不同的部分进行说明。Only the parts of this embodiment that are different from the above-mentioned embodiment will be described below.
本实施方式中，投影屏幕10的出光面12设置有柱面光栅40，扩散层50设置在柱面光栅40上。In this embodiment, the light exiting surface 12 of the projection screen 10 is provided with a cylindrical grating 40 , and the diffusion layer 50 is provided on the cylindrical grating 40 .
具体地，柱面光栅40与扩散层50形成复合结构，柱面光栅40为棱柱结构，扩散层50为表面扩散结构，表面扩散结构的尺寸小于棱柱结构的尺寸，并附着于棱柱结构的表面。Specifically, the cylindrical grating 40 and the diffusion layer 50 form a composite structure. The cylindrical grating 40 is a prism structure, and the diffusion layer 50 is a surface diffusion structure. The surface diffusion structure is smaller than the prism structure and is attached to the surface of the prism structure.
一些实施方式中，柱面光栅40的棱柱周期大于扩散层50中多个微结构单元的特征尺寸。In some implementations, the prism period of the cylindrical grating 40 is greater than the characteristic size of the plurality of microstructure units in the diffusion layer 50 .
一些具体实施方式中，棱柱周期为扩散层50中多个微结构单元的长轴的平均长度的3倍以上。在其他具体实施方式中，棱柱周期还可以为其他值，本申请对此不作限定。In some specific embodiments, the prism period is more than 3 times the average length of the long axis of the plurality of microstructure units in the diffusion layer 50. In other specific embodiments, the prism period may also be other values, which are not limited in the present application.
其中，棱柱周期小于或等于预设值。The prism period is less than or equal to a preset value.
一些具体实施方式中，预设值为800μm。在其他具体实施方式中，预设值还可以为其他值，本申请对此不作限定。In some specific implementations, the preset value is 800 μm. In other specific implementations, the preset value may also be other values, which are not limited in this application.
本实施方式与第二实施方式相比，差别在于第一观看位置31对应第一投影机21的投影光线入射方向，第二观看位置32对应第二投影机22的投影光线入射方向，这是通过复合结构中的棱柱结构实现的，通过棱柱结构对反射光线进行调控，能够保证不同位置的反射光线始终能够到达对应的观看位置附近，从而有效提高反射画面的亮度均匀性，避免画面局部偏暗的现象。同时，表面扩散结构能够扩展反射光线的角度范围，获得更大的观看视角，避免棱柱结构仅能够向单一方向反射的缺陷，从而解决画面较大时亮度分布不均的现象，提高均匀性，继而提升观看体验。Compared with the second embodiment, the difference between this embodiment and the second embodiment is that the first viewing position 31 corresponds to the incident direction of the projection light of the first projector 21, and the second viewing position 32 corresponds to the incident direction of the projection light of the second projector 22. This is achieved through the prism structure in the composite structure. By regulating the reflected light through the prism structure, it can be ensured that the reflected light at different positions can always reach the vicinity of the corresponding viewing position, thereby effectively improving the brightness uniformity of the reflected picture and avoiding the phenomenon of partial darkening of the picture. At the same time, the surface diffusion structure can expand the angle range of the reflected light, obtain a larger viewing angle, and avoid the defect that the prism structure can only reflect in a single direction, thereby solving the problem of uneven brightness distribution when the picture is large, improving uniformity, and then improving the viewing experience.
区别于现有技术，本申请通过设置包括至少两个投影机的投影机组，能够通过多个投影机在投影屏幕上形成多个不同的视点场景，以使不同位置的观看者观看不同的投影画面，从而满足多视需求；同时，通过在投影屏幕的出光面设置包括多个微结构单元的扩散层，并通过扩散层控制投影画面的扩散角度，能够使同一投影画面在不同观看位置形成较大的对比度，以确保观看者处于不同视点场景对应的观看位置内才能观看到对应的投影画面，从而实现防窥的效果；进一步地，通过使任意两个投影机的投影光线所形成的夹角大于扩散层的第一方向扩散角，能够消除多个投影画面之间的串扰，从而避免多个投影画面之间互相影响，继而满足多元化的观看需求。Different from the prior art, the present application, by providing a projector group including at least two projectors, can form multiple different viewpoint scenes on the projection screen through multiple projectors, so that viewers at different positions can watch different projection pictures, thereby meeting multi-viewing needs; at the same time, by providing a diffusion layer including multiple microstructure units on the light-emitting surface of the projection screen, and controlling the diffusion angle of the projection picture through the diffusion layer, the same projection picture can form a larger contrast at different viewing positions, so as to ensure that the viewer can only watch the corresponding projection picture at the viewing position corresponding to the different viewpoint scenes, thereby achieving an anti-peeping effect; further, by making the angle formed by the projection light of any two projectors greater than the first direction diffusion angle of the diffusion layer, crosstalk between multiple projection pictures can be eliminated, thereby avoiding mutual influence between multiple projection pictures, and then meeting diversified viewing needs.
以上所述仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322799345.5UCN221101259U (en) | 2023-10-18 | 2023-10-18 | Multi-view display system |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322799345.5UCN221101259U (en) | 2023-10-18 | 2023-10-18 | Multi-view display system |
| Publication Number | Publication Date |
|---|---|
| CN221101259Utrue CN221101259U (en) | 2024-06-07 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322799345.5UActiveCN221101259U (en) | 2023-10-18 | 2023-10-18 | Multi-view display system |
| Country | Link |
|---|---|
| CN (1) | CN221101259U (en) |
| Publication | Publication Date | Title |
|---|---|---|
| KR100618601B1 (en) | Fresnel lens sheet and rear projection screen including the same | |
| CN108803053B (en) | 3D light field display system | |
| JP2016505870A (en) | Reflective or transflective autostereoscopic display with reduced banding effect | |
| CN101162361A (en) | Screen and projection system | |
| JPS6332527A (en) | Lens sheet for transparent type projection screen | |
| CN103105697A (en) | Light source device, display device, and electronic apparatus | |
| TW201331646A (en) | Illumination device and display device having the illumination device | |
| US8395841B2 (en) | Reflective projection screen having multi-incedent angle | |
| JP2005292679A (en) | Micromirror screen | |
| JP2005300907A (en) | Screen and image projection system using the same | |
| JP4561204B2 (en) | Screen, Fresnel lens sheet used therefor, and image display device using the same | |
| US7139124B2 (en) | Wide viewing angle screen and projection television comprising the same | |
| US8403494B2 (en) | Projection-type display apparatus with a projection optical system configured to reduce speckle | |
| KR100553887B1 (en) | Image display screens having a wide viewing angle vertically and horizontally, and projection televisions having the same | |
| KR20040068926A (en) | Fresnel lens sheet and rear projection screen comprising the same | |
| JPS6368814A (en) | Lighting equipment for liquid crystal display | |
| JP2010191105A (en) | Screen and projection system | |
| JP2013073077A (en) | Reflective screen and projective image display system using the same | |
| CN221101259U (en) | Multi-view display system | |
| CN107315314B (en) | Light-transmitting projection screen capable of being watched on two sides and projection system | |
| JPH03209233A (en) | Rear projection screen for projector | |
| JP2006337459A (en) | Lens array sheet and rear projection type projection screen | |
| CN108803055A (en) | Three-dimensional display system based on slit grating | |
| JP5979624B2 (en) | Reflective front screen | |
| JP2837192B2 (en) | Rear projection screen |
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |