基于視覺舒適度的LED背光系統(tǒng)的研究
發(fā)布時間：2018-07-27 18:27
【摘要】：科技發(fā)展不斷改變著人們的生活方式,手機、平板電腦、電視等各類平板顯示器已經成為人們日常生活中必不可少的電子產品。隨著平板顯示技術的不斷完善和發(fā)展,人們在注重顯示器顯示效果的同時,逐漸開始關注顯示器對人體健康的影響,舒適性與健康性成為平板顯示技術未來發(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了平板顯示器市場的主流地位,但目前關于LED背光系統(tǒng)對人體健康,尤其是對視覺舒適度影響的研究還不夠完善。本文基于視覺舒適度,針對LED背光系統(tǒng)的藍光危害及其主要光學特性,提出了相應的測試方法,同時搭建了測試平臺�；谠摐y試平臺,對LED背光系統(tǒng)的視覺舒適度進行了研究。根據研究結果,對LED背光系統(tǒng)的光學模組進行了設計,實現(xiàn)了LED背光模組的樣機,并對樣機進行了相關性能測試。主要工作內容包括：首先,分析了LED背光系統(tǒng)造成視覺不舒適的主要原因,研究了基于視覺舒適度的LED背光系統(tǒng)的測試方法,搭建了兩套測試系統(tǒng)：1.LED背光系統(tǒng)的藍光視網膜危害測試系統(tǒng)；2.基于視覺舒適的LED背光測試系統(tǒng)�；谶@兩套測試系統(tǒng),測量了LED背光系統(tǒng)樣品的光色特性和藍光視網膜危害。其次,基于上述研究和測試結果,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)對視疲勞的影響。實驗結果表明,不同光色特性的LED背光系統(tǒng)對視疲勞的影響不同,具體表現(xiàn)在眨眼頻率的變化：當工作時間小于1小時,亮度均勻度較低的背光系統(tǒng)會引起眨眼頻率的顯著升高；隨著工作時間的推移,亮度越高,眨眼頻率上升越緩慢；當工作時間超過1小時,觀看色溫較低的背光系統(tǒng)會更早的引起眨眼頻率的升高。最后,從視覺舒適度角度出發(fā)分析了背光系統(tǒng)的色溫、亮度及亮度均勻度在設計LED背光系統(tǒng)時的重要性。提出了考慮視覺舒適度的LED背光系統(tǒng)的設計方案,對LED背光源進行了篩選,設計了能實現(xiàn)均勻圓形光斑的自由曲面透鏡,并采用Sparrow判據,對透鏡與LED的組合光源進行排布,實現(xiàn)了LED背光模組的均勻照明。搭建了LED背光模組的樣機,并對該樣機進行了測試與分析。上述工作的開展,為LED背光系統(tǒng)的視覺舒適度研究提供一定的理論和技術支持,為LED背光系統(tǒng)的設計提供了新思路。
[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.
【學位授予單位】：天津工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN873
[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.
【學位授予單位】：天津工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN873
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