技术领域technical field
本发明涉及激光投影技术领域，尤其涉及一种激光投影机色彩自动控制系统。The invention relates to the technical field of laser projection, in particular to an automatic color control system of a laser projector.
背景技术Background technique
采用激光作为光源是目前投影机行业的主流趋势，目前激光投影机的光源方案主要有两种，第一种是以RGB三色激光分别为独立光源，此种方案可以产生极高的亮度(通常为几万流明)，但是做出的产品体积会非常庞大，而且激光直接投射危险性极大，所以这种方案一般只有少数特殊场合可以应用，无法普及推广。第二种方案是使用激光和荧光色轮搭配作为激光光源，这种方案的整体体积和安全性都较前者有很大的改善，成本也相对低廉，但是目前由于技术原因还无法研制出蓝色荧光粉，所以采用蓝色激光，红绿色荧光粉的方式组合成RGB三色，以蓝色激光激发红绿色荧光粉产生红绿光。Using laser as light source is the current mainstream trend in the projector industry. At present, there are two main light source schemes for laser projectors. The first one uses RGB three-color lasers as independent light sources. This scheme can produce extremely high brightness (usually tens of thousands of lumens), but the volume of the product will be very large, and the danger of direct laser projection is extremely high, so this solution can only be applied in a few special occasions, and cannot be popularized. The second solution is to use a laser and a fluorescent color wheel as a laser light source. Compared with the former, the overall volume and safety of this solution are greatly improved, and the cost is relatively low. However, due to technical reasons, it is currently impossible to develop blue Phosphor powder, so the combination of blue laser and red and green phosphor powder forms RGB three colors, and the blue laser excites the red and green phosphor powder to produce red and green light.
在民用和商用投影机中，主要应用第二种光源方案，这种方案的激光投影机光学原理如图1所示。In civil and commercial projectors, the second light source solution is mainly used. The optical principle of the laser projector of this solution is shown in Figure 1.
驱动板1负责给半导体激光器2供电并时时控制RGB三色光的输出功率，由半导体激光器2发出的蓝光通过汇聚光学系统3后透过GDM镜4和汇聚系统5后汇聚到高速旋转的荧光色轮6上，分时域透过蓝光，蓝光经过中继光学系统7,全反射镜8,中继光学系统9,全反射镜10,中继光学系统11后到达BDM镜12，由BDM镜12反射后经过汇聚光学系统13进入匀光棒14,匀光后经过中继光学系统15后通过TIR17棱镜反射到DMD光阀16，照明DMD后再被DMD反射进投影镜头18最后投影到屏幕上。The driver board 1 is responsible for supplying power to the semiconductor laser 2 and constantly controlling the output power of the RGB three-color light. The blue light emitted by the semiconductor laser 2 passes through the converging optical system 3 and then passes through the GDM mirror 4 and the converging system 5 to converge to the high-speed rotating fluorescent color wheel On 6, the blue light is transmitted through the time-division domain, and the blue light reaches the BDM mirror 12 after passing through the relay optical system 7, the total reflection mirror 8, the relay optical system 9, the total reflection mirror 10, and the relay optical system 11, and is reflected by the BDM mirror 12 After passing through the converging optical system 13, it enters into the dodging rod 14. After dodging, it passes through the relay optical system 15 and then reflects to the DMD light valve 16 through the TIR17 prism. After illuminating the DMD, it is reflected by the DMD into the projection lens 18 and finally projected onto the screen.
红光和绿光由半导体激光器2发出的蓝色激光照射到荧光色轮6上对应的荧光粉段分时域所产生，后经汇聚透镜5到达GDM镜4，被GDM镜4反射后透过BDM镜12，再如蓝光一样经过光学系统汇聚光学系统13,匀光棒14,中继光学系统15,17,DMD光阀16,TIR棱镜17,投影镜头18后最终投影到屏幕上。图1中：1是驱动板。The red light and green light are generated by the blue laser emitted by the semiconductor laser 2 and irradiated to the corresponding phosphor segment on the fluorescent color wheel 6 in the time domain, and then reach the GDM mirror 4 through the converging lens 5, and are reflected by the GDM mirror 4 and then pass through The BDM mirror 12, like blue light, passes through the optical system converging optical system 13, uniform light rod 14, relay optical system 15, 17, DMD light valve 16, TIR prism 17, projection lens 18 and finally projects onto the screen. Among Fig. 1: 1 is a driver board.
激光投影机的色彩对用户的视觉体验尤为重要，现有激光投影机的的色彩控制方案是将RGB三色按照一定的关系配比得到所要求的色温值和混色方案，但是由于半导体激光器与荧光色轮的使用寿命有一定的差异导致二者所发出的光能随使用时间的衰减程度不一样，因此现有的激光投影机在使用一段时间后总会由于RGB三色配比发生变化导致色彩变化，最终影响用户的感官体验，也为产品带来不良的口碑，阻碍了激光投影机产业的发展。The color of the laser projector is particularly important to the visual experience of the user. The existing color control scheme of the laser projector is to match the RGB three colors according to a certain relationship to obtain the required color temperature value and color mixing scheme. However, due to the semiconductor laser and fluorescent There is a certain difference in the service life of the color wheel, which leads to a different degree of attenuation of the light energy emitted by the two with the use of time. Therefore, after a period of use, the existing laser projectors will always cause color changes due to changes in the RGB three-color ratio. Changes will eventually affect the sensory experience of users, and also bring bad reputation to the product, hindering the development of the laser projector industry.
发明内容Contents of the invention
根据现有技术存在的问题，本发明公开了一种激光投影机色彩自动控制系统，包括：激光光源模块和光机模块，所述激光光源模块将光源发出的激光光束沿着光的传播方向传播至光机模块，所述光机模块将该激光反射至投影镜头上；According to the existing problems in the prior art, the present invention discloses an automatic color control system for a laser projector, which includes: a laser light source module and an optical machine module, and the laser light source module transmits the laser beam emitted by the light source to the An optical-mechanical module, the optical-mechanical module reflects the laser light onto the projection lens;
该系统还包括设置在激光光源模块的光学器件的背面、实时采集不能反射或透射的激光光束的光强度信息，将该信息转换成与其对应的电流强度信息的光电传感器；The system also includes a photoelectric sensor arranged on the back of the optical device of the laser light source module to collect in real time the light intensity information of the laser beam that cannot be reflected or transmitted, and convert the information into corresponding current intensity information;
接收所述光电传感器传送的数据信息将该信息进行电流放大、I/V变换和A/D转换的电子运算模块；An electronic computing module that receives the data information transmitted by the photoelectric sensor and performs current amplification, I/V conversion and A/D conversion on the information;
接收所述电子运算模块传送的数据信息将该信息与其内部存储的初始设定的三色光配比分析数据进行比较的处理模块，所述处理模块将比较后的反馈信息和指令信息实时传送至驱动板，所述驱动板调节相应各色光的输出功率大小来控制投影画面的色彩保持不变。A processing module that receives the data information transmitted by the electronic operation module and compares the information with the initially set three-color light ratio analysis data stored inside, and the processing module transmits the compared feedback information and instruction information to the driver in real time board, and the driving board adjusts the output power of each color light to control the color of the projected picture to remain unchanged.
所述激光光源模块包括依次顺次排列设置的半导体激光器、第一会聚透镜、GDM镜、第二会聚透镜、荧光色轮、第一中继透镜、第一全反射镜、第二中继透镜、第二全反射镜、第三中继透镜和BDM镜，所述光电传感器设置在BDM镜的背面。The laser light source module includes a semiconductor laser arranged in sequence, a first converging lens, a GDM mirror, a second converging lens, a fluorescent color wheel, a first relay lens, a first total reflection mirror, a second relay lens, The second total reflection mirror, the third relay lens and the BDM mirror, the photoelectric sensor is arranged on the back of the BDM mirror.
所述光机模块包括依次顺次排列设置的第三会聚透镜、匀光棒、第四中继透镜显示元件和TIR棱镜，所述激光光束通过BDM镜照射至第三会聚透镜上进行光束会聚。The optical-mechanical module includes a third converging lens, a uniform rod, a fourth relay lens display element and a TIR prism arranged in sequence, and the laser beam is irradiated onto the third converging lens through a BDM mirror for beam convergence.
由于采用了上述技术方案，本发明提供的一种激光投影机色彩自动控制系统，采用光电传感器，电子运算模块和处理模块解决背景技术中提到的色彩随时间变化的问题。初始时，使用光电传感器探测光学系统中RGB三色光的最初强度并记录，之后每次开机光电传感器会自动检测三色光的光强度，输出与之对应的电流强度，然后由处理模块处理后得出与初始三色光配比差异，再反馈给驱动板调节RGB三色光的输出功率，达到稳定激光投影机色彩的作用。本发明利用光学系统中的杂散光来收集RGB三色光的光强变化状况，并未对原有光路产生任何影响，却可以有效的改善色彩随时间变化这一激光投影产业的难题，对用户的最终体验和产品的市场竞争力都有很大的提升。Due to the adoption of the above technical solution, the present invention provides an automatic color control system for laser projectors, which uses photoelectric sensors, electronic computing modules and processing modules to solve the problem of color changing with time mentioned in the background technology. Initially, the photoelectric sensor is used to detect and record the initial intensity of the RGB three-color light in the optical system, and then the photoelectric sensor will automatically detect the light intensity of the three-color light every time it is turned on, and output the corresponding current intensity, which is then processed by the processing module to obtain The difference from the initial three-color light ratio is fed back to the driver board to adjust the output power of the RGB three-color light to stabilize the color of the laser projector. The present invention uses the stray light in the optical system to collect the light intensity changes of the RGB three-color light, which does not have any impact on the original optical path, but can effectively improve the problem of the laser projection industry that the color changes with time. The final experience and market competitiveness of products have been greatly improved.
附图说明Description of drawings
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术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中记载的一些实施例，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 or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为背景技术中的示意图；Fig. 1 is a schematic diagram in the background technology;
图2为本发明激光投影机色彩自动控制系统的结构示意图。FIG. 2 is a structural schematic diagram of the automatic color control system of the laser projector of the present invention.
具体实施方式detailed description
为使本发明的技术方案和优点更加清楚，下面结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚完整的描述：In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:
如图2所示的一种激光投影机色彩自动控制系统，激光光源模块和光机模块，所述激光光源模块将光源发出的激光光束沿着光的传播方向传播至光机模块，所述光机模块将该激光传播至投影镜头18上；A laser projector color automatic control system as shown in Figure 2, a laser light source module and an optical machine module, the laser light source module transmits the laser beam emitted by the light source to the optical machine module along the light propagation direction, the optical machine The module transmits the laser light onto the projection lens 18;
该系统还包括设置在激光光源模块的光学器件的背面、实时采集不能反射或透射的激光光束的光强度信息，将该信息转换成与其对应的电流强度信息的光电传感器19；The system also includes a photoelectric sensor 19 arranged on the back of the optical device of the laser light source module, collecting in real time the light intensity information of the laser beam that cannot be reflected or transmitted, and converting the information into corresponding current intensity information;
接收所述光电传感器19传送的数据信息将该信息进行电流放大、I/V变换和A/D转换等处理的电子运算模块20；An electronic computing module 20 that receives the data information transmitted by the photoelectric sensor 19 and performs current amplification, I/V conversion, and A/D conversion on the information;
接收所述电子运算模块20传送的数据信息将该信息与其内部存储的初始设定的三色光配比分析数据进行比较的处理模块21，所述处理模块21将比较后的反馈信息和指令信息实时传送至驱动板1，所述驱动板1调节相应各色光的输出功率大小来控制投影画面的色彩保持不变。A processing module 21 that receives the data information transmitted by the electronic computing module 20 and compares the information with the initially set three-color light ratio analysis data stored inside, and the processing module 21 compares the compared feedback information and instruction information in real time It is transmitted to the driving board 1, and the driving board 1 adjusts the output power of each color light to control the color of the projected picture to remain unchanged.
进一步的，所述激光光源模块包括依次顺次排列设置的半导体激光器2、第一会聚透镜3、GDM镜4、第二会聚透镜5、荧光色轮6、第一中继透镜7、第一全反射镜8、第二中继透镜9、第二全反射镜10、第三中继透镜11和BDM镜12，所述光电传感器19设置在BDM镜12的背面。由半导体激光器2发出的蓝光通过第一汇聚透镜3后透过GDM镜4和第二汇聚透镜5后汇聚到高速旋转的荧光色轮6上，分时域透过蓝光，产生红绿光。蓝光经过第一中继透镜7,第一全反射镜8,第二中继透镜9,第二全反射镜10,第三中继透镜11后到达BDM镜12；红绿光由荧光色轮6上的荧光粉受蓝色激光辐射所产生，后由GDM镜4反射再透过BDM镜12.Further, the laser light source module includes a semiconductor laser 2, a first converging lens 3, a GDM mirror 4, a second converging lens 5, a fluorescent color wheel 6, a first relay lens 7, a first full The reflector 8, the second relay lens 9, the second total reflection mirror 10, the third relay lens 11 and the BDM mirror 12, the photoelectric sensor 19 is arranged on the back of the BDM mirror 12. The blue light emitted by the semiconductor laser 2 passes through the first converging lens 3, then passes through the GDM mirror 4 and the second converging lens 5, and then converges on the high-speed rotating fluorescent color wheel 6, and transmits the blue light in a time-division domain to generate red and green light. The blue light reaches the BDM mirror 12 after passing through the first relay lens 7, the first total reflection mirror 8, the second relay lens 9, the second total reflection mirror 10, and the third relay lens 11; The phosphor powder on the laser is produced by the blue laser radiation, and then reflected by the GDM mirror 4 and then passed through the BDM mirror 12.
进一步的，所述光机模块包括依次顺次排列设置的第三会聚透镜13、匀光棒14、第四中继透镜15、显示元件16和TIR棱镜17，所述激光光束通过BDM镜12照射至第三会聚透镜13上进行光束会聚。由BDM镜12反射的蓝光和透射的红绿光经过第三汇聚透镜13进入匀光棒14,匀光后经过第四中继透镜15后通过TIR17棱镜反射到显示元件16，照明显示元件16后再被显示元件16反射进投影镜头18最后投影到屏幕上。Further, the optical-mechanical module includes a third converging lens 13, a homogenization rod 14, a fourth relay lens 15, a display element 16 and a TIR prism 17 arranged in sequence, and the laser beam is irradiated by a BDM mirror 12 Converge the light beam on the third converging lens 13 . The blue light reflected by the BDM mirror 12 and the transmitted red and green light pass through the third converging lens 13 and enter the dodging rod 14. After dodging, pass through the fourth relay lens 15 and reflect to the display element 16 through the TIR17 prism. After the display element 16 is illuminated Then it is reflected by the display element 16 into the projection lens 18 and finally projected onto the screen.
GDM叫绿光反射分光镜，透过蓝光，反射红绿光；BDM叫蓝光反射分光镜，透过绿红光，反射蓝光。GDM is called a green light reflection beam splitter, which passes through blue light and reflects red and green light; BDM is called a blue light reflection beam splitter, which passes through green and red light and reflects blue light.
由于BDM镜12所镀的膜层无法对某一波段的光波100％反射或者透射，目前的透过率或者反射率只能达到98％～99％，所以对于BDM镜12所透射的RG光总会有1％～2％被反射；所反射的B光也总会有1％～2％被透射，因此在BDM镜12后放置一个光电传感器19来分时接收其不能反射或透射的光(由图2中虚线表示)，光电传感器19接收不同色光不同强度的光能照射后产生不同大小的电流进入电子运算模块20后进入处理模块21，处理模块21通过与初始设定的三色光配比分析比较后反馈给驱动板1调节相应各色光的输出功率大小来控制投影画面的色彩保持不变。Since the film coated on the BDM mirror 12 cannot reflect or transmit 100% of light waves of a certain wavelength band, the current transmittance or reflectivity can only reach 98% to 99%, so the total RG light transmitted by the BDM mirror 12 is 1% to 2% will be reflected; the reflected B light will always have 1% to 2% to be transmitted, so a photoelectric sensor 19 is placed behind the BDM mirror 12 to receive the light that it cannot reflect or transmit in time-sharing ( Indicated by the dotted line in Fig. 2), the photoelectric sensor 19 receives light energy of different colors and different intensities to generate currents of different sizes after being irradiated by the electronic operation module 20 and then enters the processing module 21, and the processing module 21 passes the three-color light matching ratio with the initial setting After analysis and comparison, feedback is given to the driver board 1 to adjust the output power of each color light to control the color of the projected picture to remain unchanged.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511020733.2ACN105388693A (en) | 2015-12-31 | 2015-12-31 | A Color Automatic Control System for Laser Projector |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511020733.2ACN105388693A (en) | 2015-12-31 | 2015-12-31 | A Color Automatic Control System for Laser Projector |
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| CN105388693Atrue CN105388693A (en) | 2016-03-09 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201511020733.2APendingCN105388693A (en) | 2015-12-31 | 2015-12-31 | A Color Automatic Control System for Laser Projector |
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| CN (1) | CN105388693A (en) |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | Application publication date:20160309 | |
| WD01 | Invention patent application deemed withdrawn after publication |