频率驱动液晶光阀的电光特性研究

Study on Electro-Optical Performance of Frequency Driven Liquid Crystal Light Valve

讨论了液晶光阀频率驱动方式的原理,并分析了液晶光阀在频率驱动方式下的电光特性。在特定的交流电压下改变外加电场频率,测量了TB3639型液晶光阀在频率驱动方式下的电光特性关系曲线。测量结果表明,TB3639液晶光阀在可见光区域具有电光显示灰度变化特性,不仅能实现黑白显示,也能实现不同灰度级显示。频率驱动方式在可见光的范围内对不同波长的透射率变化趋势影响大致相同,在应用中可避免出现色差较大的现象。这种新型频率驱动方式对液晶器件的显示有改善作用,将开拓液晶显示器件的新应用,具有实际应用价值。

The electro-optical characteristic and principle of frequency-driven liquid crystal light valve were discussed and analyzed. Under different electric field frequency and certain AC voltage, the electro-optical characteristic of frequency-driven TB3639 liquid crystal light valve was measured. The results show that it can display gray scale in visible light region, and it can not only display black and white, but also can display different gray scale. The influence of frequency-driven way to the transmission spectrum change tendency of different wavelength in visible light is approximately same, which will avoid high chromatism in application. The new frequency-driven liquid crystal light valve can improve display quality of liquid crystal display device. It will develop new application of liquid crystal display device and has practical application value.