【摘要】：科技發(fā)展不斷改變著人們的生活方式,手機(jī)、平板電腦、電視等各類平板顯示器已經(jīng)成為人們?nèi)粘Ｉ钪斜夭豢缮俚碾娮赢a(chǎn)品。隨著平板顯示技術(shù)的不斷完善和發(fā)展,人們?cè)谧⒅仫@示器顯示效果的同時(shí),逐漸開(kāi)始關(guān)注顯示器對(duì)人體健康的影響,舒適性與健康性成為平板顯示技術(shù)未來(lái)發(fā)展的重要方向�，F(xiàn)階段,以LED為背光源的液晶顯示器占據(jù)了平板顯示器市場(chǎng)的主流地位,但目前關(guān)于LED背光系統(tǒng)對(duì)人體健康,尤其是對(duì)視覺(jué)舒適度影響的研究還不夠完善。本文基于視覺(jué)舒適度,針對(duì)LED背光系統(tǒng)的藍(lán)光危害及其主要光學(xué)特性,提出了相應(yīng)的測(cè)試方法,同時(shí)搭建了測(cè)試平臺(tái)�；谠摐y(cè)試平臺(tái),對(duì)LED背光系統(tǒng)的視覺(jué)舒適度進(jìn)行了研究。根據(jù)研究結(jié)果,對(duì)LED背光系統(tǒng)的光學(xué)模組進(jìn)行了設(shè)計(jì),實(shí)現(xiàn)了LED背光模組的樣機(jī),并對(duì)樣機(jī)進(jìn)行了相關(guān)性能測(cè)試。主要工作內(nèi)容包括：首先,分析了LED背光系統(tǒng)造成視覺(jué)不舒適的主要原因,研究了基于視覺(jué)舒適度的LED背光系統(tǒng)的測(cè)試方法,搭建了兩套測(cè)試系統(tǒng)：1.LED背光系統(tǒng)的藍(lán)光視網(wǎng)膜危害測(cè)試系統(tǒng)；2.基于視覺(jué)舒適的LED背光測(cè)試系統(tǒng)�；谶@兩套測(cè)試系統(tǒng),測(cè)量了LED背光系統(tǒng)樣品的光色特性和藍(lán)光視網(wǎng)膜危害。其次,基于上述研究和測(cè)試結(jié)果,系統(tǒng)分析了在不同色溫、亮度、亮度均勻度情況下,LED背光系統(tǒng)對(duì)視疲勞的影響。實(shí)驗(yàn)結(jié)果表明,不同光色特性的LED背光系統(tǒng)對(duì)視疲勞的影響不同,具體表現(xiàn)在眨眼頻率的變化：當(dāng)工作時(shí)間小于1小時(shí),亮度均勻度較低的背光系統(tǒng)會(huì)引起眨眼頻率的顯著升高；隨著工作時(shí)間的推移,亮度越高,眨眼頻率上升越緩慢；當(dāng)工作時(shí)間超過(guò)1小時(shí),觀看色溫較低的背光系統(tǒng)會(huì)更早的引起眨眼頻率的升高。最后,從視覺(jué)舒適度角度出發(fā)分析了背光系統(tǒng)的色溫、亮度及亮度均勻度在設(shè)計(jì)LED背光系統(tǒng)時(shí)的重要性。提出了考慮視覺(jué)舒適度的LED背光系統(tǒng)的設(shè)計(jì)方案,對(duì)LED背光源進(jìn)行了篩選,設(shè)計(jì)了能實(shí)現(xiàn)均勻圓形光斑的自由曲面透鏡,并采用Sparrow判據(jù),對(duì)透鏡與LED的組合光源進(jìn)行排布,實(shí)現(xiàn)了LED背光模組的均勻照明。搭建了LED背光模組的樣機(jī),并對(duì)該樣機(jī)進(jìn)行了測(cè)試與分析。上述工作的開(kāi)展,為L(zhǎng)ED背光系統(tǒng)的視覺(jué)舒適度研究提供一定的理論和技術(shù)支持,為L(zhǎng)ED背光系統(tǒng)的設(shè)計(jì)提供了新思路。
[Abstract]:The development of science and technology has constantly changed the way of people's life. Mobile phones, tablet computers, TV and other flat panel displays have become an essential electronic product in people's daily life. With the continuous improvement and development of flat display technology, people pay attention to display to human health while paying attention to the display effect of display. The influence, comfort and health become an important direction in the future development of flat-panel display technology. At present, the liquid crystal display with LED as the backlight source occupies the mainstream position of the flat panel display market, but the research on the effect of the LED backlight system on human health, especially the visual comfort, is not perfect. This article is based on the vision According to the blue light hazard and the main optical characteristics of the LED backlight system, the corresponding testing method is put forward, and the test platform is built. Based on the test platform, the visual comfort of the LED backlight system is studied. Based on the research results, the optical module of the LED backlight system is designed and the LED backlight module is realized. The main contents of the prototype are as follows: first, the main reasons for the visual discomfort caused by the LED backlight system are analyzed, and the testing methods of the LED backlight system based on the visual comfort are studied, and two sets of test systems are set up: the Blu ray retina hazard test system of the 1.LED backlight system; the 2. base system. The visual comfort test system of LED backlight. Based on these two test systems, the light color characteristics of the LED backlight system and the damage of the blue light retina are measured. Secondly, based on the above research and test results, the effect of the LED backlight system on visual fatigue under the conditions of different color temperature, brightness and brightness uniformity is systematically analyzed. The experimental results show that The effect of the LED backlight system with different light and color characteristics to the visual fatigue is different, which is manifested in the change of the blink frequency: when the working time is less than 1 hours, the backlight system with lower brightness uniformity will cause a significant increase in the blink frequency; the higher the brightness, the slower the blink frequency increases with the work time, and when the working time exceeds that. 1 hours, watching the lower color temperature of the backlight system will lead to the increase of the blink frequency earlier. Finally, the importance of color temperature, brightness and brightness uniformity in the design of the LED backlight system is analyzed from the angle of visual comfort. The design of the LED backlight system considering the visual comfort is proposed, and the LED backlight is carried out. The free surface lens which can realize the uniform circular spot is designed, and the Sparrow criterion is used to arrange the combined light source of the lens and LED. The uniform illumination of the LED backlight module is realized. The prototype of the LED backlight module is set up, and the prototype is tested and analyzed. The work carried out above is the vision of the LED backlight system. The study of comfort provides some theoretical and technical support, which provides a new idea for the design of LED backlight system.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN873

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