Analysis of color gamut of LCD system based on LED backlight with area-controlling technique

Fu Wen Li, Wei Qi Jin*, Xi Bin Shao, Li Lei Zhang, Li Fang Wan

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

8 引用 (Scopus)

摘要

Color gamut as a significant performance index for display system describes the color reproduction ability IN real scenes. liquid crystal display (LCD) is the most popular technology in flat panel display. However, conventional cold cathode fluorescent lamp (CCFL) backlight of LCD can not behave high color gamut compared with cathode ray tube (CRT). The common used method of color gamut measuring for LCD system is introduced at the beginning. According to the inner structure and display principle of LCD system, there are three major factors deciding LCD's color gamut: spectral properties of backlight, transmittance properties of color filters and performance of liquid crystal panel. Instead of conventional backlight CCFL, RGB-LED backlight is used for improving color reproduction of LCD display system. Due to the imperfect match between RGB-LED's spectra and color filter's transmittance, the color filter would reduce the color gamut of LCD system more or less. Therefore, LCD system based on LED backlight with area-control technique is introduced which modifies backlight control signal according to the input signal. After analyzing and calculating the spectra of LED backlight which passes through the color filters using method of colorimetry, the area sizes of color gamut triangles of RGB-LED backlight with area-control and RGB-LED backlight without area-control LCD systems are compared and the relationship between color gamut and varying contrast of liquid crystal panel is analyzed. It is indicated that LED backlight with area-control technique can avoid color saturation dropping and have little effects on the contrast variation of liquid crystal panel. In other words, LED backlight with area-control technique relaxes the requirements of both color filter performance and liquid crystal panel. Thus, it is of importance to improve the color gamut of the current LCD system with area-control LED backlight.

源语言英语
页(从-至)1371-1375
页数5
期刊Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
30
5
DOI
出版状态已出版 - 5月 2010

指纹

探究 'Analysis of color gamut of LCD system based on LED backlight with area-controlling technique' 的科研主题。它们共同构成独一无二的指纹。

引用此