快速响应的共面转换型液晶显示器

Fast-response in-plane switching liquid crystal display

共面转换液晶显示器(IPS-LCD)由于其具有可视角度大、色彩真实、画质出色等优点,在平板显示器中得到了广泛应用,然而响应速度慢限制了其在高端显示器中的应用。本文中,首先通过采用正性液晶,对IPS类型中的边缘场转换型(FFS)和边缘场共面转换型(FIS)的液晶显示器,不同摩擦角度下的电光特性和响应时间进行了模拟计算。然后从预倾角度、电极尺寸以及弹性常数出发,对FIS液晶盒结构参数进行了优化,提出了一种快速响应的液晶显示器。我们通过计算机模拟发现,在FFS液晶盒中,摩擦角度对工作电压具有较大影响,小摩擦角度可实现高透过率、低工作电压;而在FIS液晶盒中,摩擦角度对响应时间具有较大影响,大于10°时与2°时相比,响应速度可提高82.7%以上。并且,不同摩擦角度下,弹性常数对FIS液晶显示器的响应速度影响不同,摩擦角度为2°时,响应速度与弹性常数K11、K22、K33都有关,而摩擦角度为12°时,响应速度只与K22有关,这个原因导致了12°与2°时相比,响应速度提高了84.2%。

Excellent viewing angle and outstanding ability of color reproduction in-plane switching liq-uid crystal displays （IPS-LCDs） are widely applied in TFT-LCD. However, its development in high- end LCD is limited by its slow response. In this paper, the electro-optic characteristics and response time of FFS and FIS modes in the IPS type are simulated with different rubbing angle by using the positive liquid crystal material. Furthermore, we report a simple method to reduce the response time in the fringe and in-plane switching （FIS） cell by optimizing tilt angle, electrodes size, and elastic constants. Through the simulations, we can obtain that the rubbing angle has a great influence onoperating voltage in FFS cell, a mg ang add FIS voltage. However e is greater than tlon t mode. rubbing an hing speed he elastic c When the gle is 12°, of 84.2G , the rubbing angle has a great impact on the response time in FIS cell. When the 10°, the response speed is increased by more than 82.7% compared with 2°. In onstants have an effect on the response time under different rubbing angles in the rubbing angle is 2°, the response speed is related to K11 , K22 and K33. When the the response speed is only related to K22, which results in an increase in switc- compared to 2°.