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照明系统是投影显示系统的重要组成部分,决定着整个系统的亮度和照明均匀性。复眼系统是一种常见的液晶投影显示系统照明结构。传统的复眼照明系统设计方法中,复眼小透镜具有与液晶板相同的长宽比,可以获得能量利用率和均匀性都比较好的照明光斑。但研究发现,利用这种方法设计宽银幕投影显示设备的复眼照明系统,会引起一定的光能损失。针对这一问题,通过对复眼系统设计理论的分析和对实际复眼照明系统的模拟,创新性地提出了在照明系统中引入柱面透镜改变复眼小透镜的长宽比的设计方法,能够有效的提高投影系统能量利用率。模拟计算结果表明,引入柱面透镜的复眼照明系统与传统方法设计的复眼系统相比,能量利用率可以提高5%到10%。
Lighting system is an important part of the projection display system, determines the overall system brightness and lighting uniformity. Compound eye system is a common LCD projection display system lighting structure. In the traditional design method of compound eye lighting system, the compound eye lens has the same aspect ratio as that of the liquid crystal panel, and the illumination spot with good energy utilization and uniformity can be obtained. However, the study found that the use of this method to design wide-screen projection display device compound eye lighting system, will cause some loss of light energy. In response to this problem, through the analysis of the design theory of the compound eye system and the simulation of the actual compound eye illumination system, the design method of introducing the cylindrical lens into the illumination system to change the aspect ratio of the compound eye lens is proposed innovatively, which can effectively Improve projection system energy efficiency. The simulation results show that the compound eye illumination system with cylindrical lens can increase the energy utilization by 5% -10% compared with the compound eye system designed by the traditional method.