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LED背光源电视模组光学参数的理论计算及其应用

编辑:chinafpd 2012-05-22 17:02 浏览 评论 评论 7 赞    来源: 

  本文阐述了液晶电视背光源的发展趋势、LED背光源的发展现状及技术优势。 基于色度学理论,介绍了LED背光源模组的色域、色温、色差的计算方法。

  本文通过改变LED光谱中的黄光发射峰的中心波长位置及其强度来考察色域、色温、色差的变化,蓝光发射峰的波长及强度不变,黄光发射峰中心波长变化范围为530nm-570nm.强度变化范围为样品黄光峰强度的80%-120%。结果发现:黄光波峰左移及其强度增加均会导致色域的增大,反之减小,其中黄光波峰每左移5nm,色域会增大2%-4%,强度每增加5%,色域会增大0.01%-0.2%;黄光波峰左移及其强度减小均会导致色温的升高,反之降低,其中黄光波峰每左移5nm,色温上升,幅度最大的从12500K上升至15000K,强度每减小5%,色温上升,幅度最大的从16000K上升至19000K;黄光波峰的移动及强度变化均导致色坐标的变化。

  在LED的制作过程中,可以将模组的理论计算值作为参考,通过调整发光材料的组分来达到模组光学要求,有很高的应用价值。

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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