高光效宽色域LED投影照明系统设计
发布时间：2018-11-06 10:26
【摘要】：随着LED发光效率的不断提高,大功率LED光源逐渐应用到投影系统中。基于三色LED与方棒的照明系统,具有色域高、体积小的优点。由于LED发光角度较大,导致进入方棒的一定角度内的光线有限,造成投影亮度不高的问题。本文利用光学扩展量匹配原则和非成像光学理论设计了和后续光学系统相匹配的高光效、宽色域LED投影照明系统,提高了整个投影系统的能量利用率,扩大了投影系统的色域。本文首先根据LED光源特点以及非成像光学理论,提出了LED投影显示方棒照明光路的整体设计思路和设计方法。理论计算了红绿蓝三色LED光源的光通量;针对LED的发光特性,采用两种不同方法设计了准直器。根据后续显示系统特点以及反向设计方法,设计了与准直器匹配的两种收集器。基于光学扩展量守恒原理,设计了锥形方棒均光系统。根据投影照明系统中各器件的设计参数,在光学软件中建立了两组LED投影方棒照明系统的仿真模型。验证并分析了仿真结果,选取了光学性能指标较好的一组进行加工。搭建了实际LED方棒照明系统光路,并与后续的光学系统组合成投影显示系统。测试结果表明:设计的LED投影方棒照明系统实现了对LED出射光束的高效收集和均光;色饱和度达到75%NTSC标准色域。同时,采用了设计的LED投影方棒照明系统的投影机比市面上常见的LED投影机在显示画面亮度上提高了16.9%,投影显示系统的能量利用效率得到提升。设计的LED投影方棒照明系统实现了高光效、宽色域的要求。
[Abstract]:With the improvement of LED luminescence efficiency, high power LED light source is gradually applied to projection system. The illumination system based on three color LED and square bar has the advantages of high color gamut and small volume. Because of the large luminous angle of LED, the light in a certain angle of the square bar is limited, and the projection brightness is not high. Based on the principle of optical spread matching and the theory of non-imaging optics, a high light efficiency and wide color gamut LED projection illumination system is designed to match the subsequent optical system, which improves the energy utilization ratio of the whole projection system and expands the color gamut of the projection system. Firstly, according to the characteristics of LED light source and the theory of non-imaging optics, the whole design idea and method of LED projection display square bar bright light path are put forward in this paper. The luminous flux of red, green and blue LED light source is calculated theoretically, and the collimator is designed by two different methods according to the luminescence characteristics of LED. According to the characteristics of the subsequent display system and the reverse design method, two kinds of collector matching the collimator are designed. Based on the principle of conserving optical spreading quantity, a conical square bar light sharing system is designed. According to the design parameters of each device in the projective illumination system, the simulation models of two groups of LED projector bar illumination system are established in the optical software. The simulation results are verified and analyzed. The optical path of the actual LED square bar illumination system is built, and the projection display system is combined with the subsequent optical system. The test results show that the designed LED projection bar illumination system can efficiently collect and homogenize the LED beam, and the color saturation is up to the standard color gamut of 75%NTSC. At the same time, the projector using the designed LED projection bar illumination system improves the brightness of the display screen by 16.9. the energy utilization efficiency of the projection display system is improved compared with the common LED projector in the market. The design of LED projection bar lighting system realizes the requirement of high light efficiency and wide color gamut.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM923.34
本文编号：2314010
[Abstract]:With the improvement of LED luminescence efficiency, high power LED light source is gradually applied to projection system. The illumination system based on three color LED and square bar has the advantages of high color gamut and small volume. Because of the large luminous angle of LED, the light in a certain angle of the square bar is limited, and the projection brightness is not high. Based on the principle of optical spread matching and the theory of non-imaging optics, a high light efficiency and wide color gamut LED projection illumination system is designed to match the subsequent optical system, which improves the energy utilization ratio of the whole projection system and expands the color gamut of the projection system. Firstly, according to the characteristics of LED light source and the theory of non-imaging optics, the whole design idea and method of LED projection display square bar bright light path are put forward in this paper. The luminous flux of red, green and blue LED light source is calculated theoretically, and the collimator is designed by two different methods according to the luminescence characteristics of LED. According to the characteristics of the subsequent display system and the reverse design method, two kinds of collector matching the collimator are designed. Based on the principle of conserving optical spreading quantity, a conical square bar light sharing system is designed. According to the design parameters of each device in the projective illumination system, the simulation models of two groups of LED projector bar illumination system are established in the optical software. The simulation results are verified and analyzed. The optical path of the actual LED square bar illumination system is built, and the projection display system is combined with the subsequent optical system. The test results show that the designed LED projection bar illumination system can efficiently collect and homogenize the LED beam, and the color saturation is up to the standard color gamut of 75%NTSC. At the same time, the projector using the designed LED projection bar illumination system improves the brightness of the display screen by 16.9. the energy utilization efficiency of the projection display system is improved compared with the common LED projector in the market. The design of LED projection bar lighting system realizes the requirement of high light efficiency and wide color gamut.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM923.34
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