本文闡述了液晶電視背光源的發展趨勢、LED背光源的發展現狀及技術優勢。 基于色度學理論，介紹了LED背光源模組的色域、色溫、色差的計算方法。
本文通過改變LED光譜中的黃光發射峰的中心波長位置及其強度來考察色域、色溫、色差的變化，藍光發射峰的波長及強度不變，黃光發射峰中心波長變化范圍為530nm-570nm.強度變化范圍為樣品黃光峰強度的80%-120%。結果發現：黃光波峰左移及其強度增加均會導致色域的增大，反之減小，其中黃光波峰每左移5nm,色域會增大2%-4%，強度每增加5%，色域會增大0.01%-0.2%；黃光波峰左移及其強度減小均會導致色溫的升高，反之降低，其中黃光波峰每左移5nm,色溫上升，幅度最大的從12500K上升至15000K，強度每減小5%，色溫上升，幅度最大的從16000K上升至19000K；黃光波峰的移動及強度變化均導致色坐標的變化。
在LED的制作過程中，可以將模組的理論計算值作為參考，通過調整發光材料的組分來達到模組光學要求，有很高的應用價值。
Theoretical calculation of optical parameters of LCD TV with LED backlight and its application
Wang Kai, Lou Shuangling, Liu Kun ，Xie Fei ，
Zhou Zhongwei,Zhang Keran
(SKYWORTH LCD (SHENZHEN)CO.LTD.)
Abstract: In recently years, backlight technology as light sources of liquid crystal display develops rapidly. And LED backlight has gradually become the main stream. It is mainly used in LCD TV, mobile phone and so on，in order to expanding the gamut, improving dynamic contrast and energy saving.
This paper describes the development trend of LCD TV backlight, the present development situation and technical advantage of LED backlight. Based on the color theories, the calculation method of gamut, temperature, chromatism is introduced..
By changing the LED spectra such as the central wavelength position and intensity of the yellow light emission peak, the changing of gamut, temperature, chromatism is inspected, the wavelength of the blue light emission peak and the strength stay unchanged，the yellow light emission peak wavelength range from 530nm to 570nm，strength from 80% of samples yellow light emission peak strength to 120%.The results found that moving left and its intensity increasing of yellow light wave caused gamut increase，when yellow light wave moves left 5nm, color gamut will increase 2%-4%，strength 5% increase, color gamut will increase 0.01%-0.2%.Yellow light wave moves left and its intensity decreases are causing a color temperature increases, when yellow light wave moves left 5nm, color temperature rise, the largest amount is from 12500 K rose to 15000 K，strength reduces 5%, the color temperature rise, the largest amount is from 16000 K rose to 19000 K.The moving of yellow light wave and strength changes also change the color coordinates.
In the process of LED making, the theoretical calculation value can be a reference. Then adjust the luminous material components to achieve module optical requirements, It has high applied value.
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