本文選題：LED + DMD��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：目前,隨著便攜設(shè)備的普及和多媒體設(shè)備的集成,對便攜式設(shè)備的顯示尺寸提出了更多的要求。液晶顯示屏幕占領(lǐng)了14以下的顯示終端市場,但是無法再進(jìn)行更大的擴展。而便攜式設(shè)備的信息分享對便攜式設(shè)備的顯示技術(shù)提出以下要求:體積更小、顯示尺寸更大、光能利用率要高等,這些都不是傳統(tǒng)的顯示技術(shù)能夠達(dá)到。微型投影技術(shù)是便攜式顯示設(shè)備的革命,它具有小尺寸、大的顯示畫面,必將成為移動設(shè)備上不可或缺的關(guān)鍵技術(shù)。但是,微型投影機面臨需要進(jìn)一步提高光效率和縮小體積的問題,以利于延長電池供電的工作時間和應(yīng)用領(lǐng)域。本文針對這樣的問題,對可以嵌入便攜設(shè)備的微型投影機的光學(xué)系統(tǒng)進(jìn)行了設(shè)計,主要在特定的小尺寸范圍內(nèi)實現(xiàn)投影光學(xué)系統(tǒng)的高效率。論文所做的主要工作和取得的成果如下:1、首先介紹了微型投影機的設(shè)計意義、研究現(xiàn)狀。對所選用的投影芯片DMD進(jìn)行了簡單的介紹。對LED光源應(yīng)用在微投影光學(xué)引擎上的優(yōu)勢和不足進(jìn)行了分析,并對LED光源與DMD結(jié)合使用的優(yōu)勢進(jìn)行了分析。2、介紹了光學(xué)設(shè)計中的非成像光學(xué)理論,以及非成像光學(xué)在微投影光學(xué)引擎設(shè)計中的應(yīng)用,尤其是光學(xué)擴展量在優(yōu)化設(shè)計中的應(yīng)用。介紹了微投影光學(xué)引擎設(shè)計中的評價參數(shù)和設(shè)計目標(biāo)。3、提出了兩種微型投影光學(xué)系統(tǒng)的設(shè)計方案。一種是采用復(fù)眼透鏡作為主要光學(xué)元件,配合二色鏡混色使用;另一種是采用光棒混光和勻光,與TIR棱鏡組合對投影芯片進(jìn)行照明。在軟件ZEMAX中對投影機的鏡頭進(jìn)行了相關(guān)設(shè)計。使用tracepro軟件對方案一中的復(fù)眼透鏡、二色鏡進(jìn)行了建模、仿真、分析和優(yōu)化,光學(xué)效率仿真結(jié)果為8.99%。在tracepro軟件中對方案二中的光棒、中繼光學(xué)系統(tǒng)、TIR棱鏡進(jìn)行了建模、仿真、分析和優(yōu)化,光學(xué)效率仿真結(jié)果為12.2%。4、對CREE公司和luminus公司的兩套三基色LED光源進(jìn)行了測試。對復(fù)眼透鏡系統(tǒng)到達(dá)DMD芯片上的光學(xué)效率進(jìn)行了測試,結(jié)果為15.6%,對整體系統(tǒng)的光學(xué)效率進(jìn)行了估算,整體效率在8%左右,仿真結(jié)果與實測結(jié)果相近。論文最后對本文工作進(jìn)行了總結(jié),總結(jié)了兩種方案設(shè)計中的不足,提出了方案的改進(jìn)方向和意見。對采用光棒與TIR棱鏡組合的光學(xué)系統(tǒng)的優(yōu)化提出了方向和意見。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN873

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本文編號：2062416