为了降低LED背光液晶显示器的能耗, 提出了四原色LED背光方案, 并对该四原色LED重新表达颜色的节能性能以及色差进行研究。首先, 由于人眼对于红色光不敏感, 文中提出了一种使用第四原色替代红色来重新表示复合颜色的方法。为了达到最佳的节能效果, 引入了发光效率来确定第四种原色。之后通过色域分区的方式, 说明了三原色到四原色的转换方法。最后, 介绍了如何评估颜色重新表达后的色差。结果表明, 通过OGB颜色而不是流行的RGB颜色重现复合颜色, 功耗平均降低了20%以上, 使用OGB表达颜色与RGB表达颜色的平均色差ΔE小于1.9。文中提出四原色LED背光方案, 对于目前的液晶显示器有良好的节能效果, 不会使图像的显示产生明显的色差, 符合当前显示器的显示准确和节能的要求。

To reduce the energy consumption of LED backlight LCD, the four-primary-color backlight schemes are proposed. The energy-saving performance and chromatic aberration of the four-primary-color LED reproducing colors are studied. Firstly, since the human eye is not sensitive to red light, a method to use the fourth primary color instead of red is proposed to represent the color. To achieve the best energy-saving effect, the radiate luminous efficiency is introduced to determine the fourth primary color. Next, the method of converting the three primary colors to the four primary colors is explained by means of color gamut partitioning. Finally, how to evaluate the chromatic aberration of the reproduced colors is introduced. The results show that by using OGB colors instead of the popular RGB colors to reproduce composite colors, the average power consumption is reduced by more than 20%, and the average chromatic aberration of the reproduced colors of OGB and RGB is less than 1.5. This paper proposes a four-primary color LED backlight scheme, which has a good energy-saving effect for LCD and meets the requirements of current display accuracy and energy saving.