白光LED对直下式TV背光色域的影响

Effect of White LEDs on Gamut of TV with Direct Illumination-type LED Backlight

白光LED背光源具有光学特性好、功耗低、寿命长、对比度高、驱动系统简便等优势,但并不是所有的LED产品都适合做背光光源。研究了液晶面板和不同的白光LED产品对色域的影响,指出只有通过选择适当波长的LED和与之相匹配的彩膜,才能得到较高的色彩还原性。一般照明用二波段LED产品由于形成混合峰,相互之间的制约使得其最高只能达到75.2%的NTSC色域;而对三波段LED产品,三波峰相对独立,故能实现较高的84.2%色域。

BacMights based on white LEDs have play（LCD） such as good optical property, low significant advantages for liquid crystal dis- power dissipation, long lifetime, high contrast, simple drive system and so on. However, not all LEDs are suitable for light source of backlights. The influence of liquid panel and different white LEDs on color gamut are investigated. Results showed that, to obtain high color gamut, LCD pannel and the corresponding LED light source are needed. Due to the mixed crest, 9.-band LEDs which used for illumina- tion only achieved 75.2% NTSC gamut. Then for 3-band LEDs, as its crests are independent relatively, it could obtained 84. 2 %color gamut.