【摘要】：隨著LED發(fā)光效率的不斷提高,大功率LED光源逐漸應(yīng)用到投影系統(tǒng)中�；谌獿ED與方棒的照明系統(tǒng),具有色域高、體積小的優(yōu)點(diǎn)。由于LED發(fā)光角度較大,導(dǎo)致進(jìn)入方棒的一定角度內(nèi)的光線有限,造成投影亮度不高的問題。本文利用光學(xué)擴(kuò)展量匹配原則和非成像光學(xué)理論設(shè)計(jì)了和后續(xù)光學(xué)系統(tǒng)相匹配的高光效、寬色域LED投影照明系統(tǒng),提高了整個(gè)投影系統(tǒng)的能量利用率,擴(kuò)大了投影系統(tǒng)的色域。本文首先根據(jù)LED光源特點(diǎn)以及非成像光學(xué)理論,提出了LED投影顯示方棒照明光路的整體設(shè)計(jì)思路和設(shè)計(jì)方法。理論計(jì)算了紅綠藍(lán)三色LED光源的光通量;針對(duì)LED的發(fā)光特性,采用兩種不同方法設(shè)計(jì)了準(zhǔn)直器。根據(jù)后續(xù)顯示系統(tǒng)特點(diǎn)以及反向設(shè)計(jì)方法,設(shè)計(jì)了與準(zhǔn)直器匹配的兩種收集器。基于光學(xué)擴(kuò)展量守恒原理,設(shè)計(jì)了錐形方棒均光系統(tǒng)。根據(jù)投影照明系統(tǒng)中各器件的設(shè)計(jì)參數(shù),在光學(xué)軟件中建立了兩組LED投影方棒照明系統(tǒng)的仿真模型。驗(yàn)證并分析了仿真結(jié)果,選取了光學(xué)性能指標(biāo)較好的一組進(jìn)行加工。搭建了實(shí)際LED方棒照明系統(tǒng)光路,并與后續(xù)的光學(xué)系統(tǒng)組合成投影顯示系統(tǒng)。測(cè)試結(jié)果表明:設(shè)計(jì)的LED投影方棒照明系統(tǒng)實(shí)現(xiàn)了對(duì)LED出射光束的高效收集和均光;色飽和度達(dá)到75%NTSC標(biāo)準(zhǔn)色域。同時(shí),采用了設(shè)計(jì)的LED投影方棒照明系統(tǒng)的投影機(jī)比市面上常見的LED投影機(jī)在顯示畫面亮度上提高了16.9%,投影顯示系統(tǒng)的能量利用效率得到提升。設(shè)計(jì)的LED投影方棒照明系統(tǒng)實(shí)現(xiàn)了高光效、寬色域的要求。
[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.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM923.34

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本文編號(hào)：2314010