基于LED光源的DLP微投影显示光学引擎的研究

发布时间：2018-06-24 17:46

本文选题：LED + DMD　；参考：《电子科技大学》2014年硕士论文

【摘要】：目前,随着便携设备的普及和多媒体设备的集成,对便携式设备的显示尺寸提出了更多的要求。液晶显示屏幕占领了14以下的显示终端市场,但是无法再进行更大的扩展。而便携式设备的信息分享对便携式设备的显示技术提出以下要求:体积更小、显示尺寸更大、光能利用率要高等,这些都不是传统的显示技术能够达到。微型投影技术是便携式显示设备的革命,它具有小尺寸、大的显示画面,必将成为移动设备上不可或缺的关键技术。但是,微型投影机面临需要进一步提高光效率和缩小体积的问题,以利于延长电池供电的工作时间和应用领域。本文针对这样的问题,对可以嵌入便携设备的微型投影机的光学系统进行了设计,主要在特定的小尺寸范围内实现投影光学系统的高效率。论文所做的主要工作和取得的成果如下:1、首先介绍了微型投影机的设计意义、研究现状。对所选用的投影芯片DMD进行了简单的介绍。对LED光源应用在微投影光学引擎上的优势和不足进行了分析,并对LED光源与DMD结合使用的优势进行了分析。2、介绍了光学设计中的非成像光学理论,以及非成像光学在微投影光学引擎设计中的应用,尤其是光学扩展量在优化设计中的应用。介绍了微投影光学引擎设计中的评价参数和设计目标。3、提出了两种微型投影光学系统的设计方案。一种是采用复眼透镜作为主要光学元件,配合二色镜混色使用;另一种是采用光棒混光和匀光,与TIR棱镜组合对投影芯片进行照明。在软件ZEMAX中对投影机的镜头进行了相关设计。使用tracepro软件对方案一中的复眼透镜、二色镜进行了建模、仿真、分析和优化,光学效率仿真结果为8.99%。在tracepro软件中对方案二中的光棒、中继光学系统、TIR棱镜进行了建模、仿真、分析和优化,光学效率仿真结果为12.2%。4、对CREE公司和luminus公司的两套三基色LED光源进行了测试。对复眼透镜系统到达DMD芯片上的光学效率进行了测试,结果为15.6%,对整体系统的光学效率进行了估算,整体效率在8%左右,仿真结果与实测结果相近。论文最后对本文工作进行了总结,总结了两种方案设计中的不足,提出了方案的改进方向和意见。对采用光棒与TIR棱镜组合的光学系统的优化提出了方向和意见。
[Abstract]:At present, with the popularity of portable devices and the integration of multimedia devices, more requirements are put forward for the display size of portable devices. LCD screens account for less than 14% of the display terminal market, but can not be extended further. However, the information sharing of portable devices requires the display technology of portable devices as follows: smaller size, larger display size and higher utilization ratio of light energy, which are not achieved by traditional display technology. Micro projection technology is the revolution of portable display equipment, it has small size, large display screen, will become an indispensable key technology on mobile devices. However, the micro projector is faced with the problem of further improving the optical efficiency and reducing the volume, so as to extend the working time and application field of battery power supply. In order to solve this problem, the optical system of micro projector which can be embedded in portable equipment is designed in this paper, and the high efficiency of projection optical system is realized in a specific small scale range. The main work and achievements of this paper are as follows: 1. Firstly, the design significance and research status of micro projector are introduced. The selected projection chip DMD is briefly introduced. The advantages and disadvantages of LED light source applied in micro-projection optical engine are analyzed, and the advantages of combining LED light source with DMD are analyzed. The theory of non-imaging optics in optical design is introduced. And the application of non-imaging optics in the design of micro-projection optics engine, especially the application of optical expansions in optimization design. This paper introduces the evaluation parameters and design target of the design of the micro-projection optical engine, and puts forward two design schemes of the micro-projective optical system. One is to use compound eye lens as the main optical element, and the other is to combine the optical rod with the tir prism to illuminate the projection chip. In the software ZEMAX, the projector lens is designed. The compound eye lens and dichroic mirror are modeled, simulated, analyzed and optimized by tracepro software. The simulation result of optical efficiency is 8.99. In tracepro software, the optical rod and relay optical system are modeled, simulated, analyzed and optimized. The result of optical efficiency simulation is 12.2. 4. Two sets of trichromatic LED light sources of CREE and luminus are tested. The optical efficiency of the compound lens system to the DMD chip is tested, the result is 15.60.The overall efficiency of the whole system is estimated to be about 8%. The simulation results are close to the measured results. Finally, the paper summarizes the work of this paper, summarizes the shortcomings of the two schemes, and puts forward the direction and suggestions for improvement. The direction and suggestions for optimization of optical system with combination of rod and tir prism are presented.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN873

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