电容触摸式LCD视角补偿及三基色色散特性研究

Research on Viewing Angle Compensation of LCD with Capacitive Touch Panel and Dispersion Characteristics of Three Primary Colors

通过延迟膜实现对偏振光的调制,改善液晶显示器件视角和补偿RGB三基色色散特性。用WGD-6型光学多道分析器分别测试电容触摸式LCD以及带延迟膜的电容触摸式LCD在不同电压驱动下垂直方向上不同视角的三基色电光特性。结果表明,随着视角的不断增大,电容触摸式LCD垂直方向上绿基色的相对光强偏离红、蓝基色的相对光强十分严重,导致显示图像偏色现象严重;在电容触摸式LCD表面贴加延迟膜之后,能够有效地降低三基色相对光强的差值,从而达到颜色校正、扩大可视角度的目的。

Viewing angles of liquid crystal display （LCD） can be improved and three primary colors disper- sion characteristics of red-green-blue （RGB） can be compensated by modulating polarized light with retardation film. Electro-optical characteristics of three primary colors of capacitive touch panel （CTP） LCD with and with- out retardation film under different driving voltages at vertical direction with different viewing angles are tested by WGD-6 optical multi-channel analyzer respectively. Experimental results show that as viewing angles in- crease, relative light intensity of green primary color of CTP LCD at vertical direction deviates seriously from that of red and blue primary colors. It results in obvious color deviation. Relative light intensity difference of three primary colors is reduced effectively after a retardation film is coated on the surface of CTP-LCD. So color correction and viewing angle increment can be achieved.