宽窄视角切换技术的制程改善应用于液晶显示屏的节能架构

Process improvement of hybrid viewing-angle technology for energy-saving architecture on LCD

为了让液晶分子受电场转动的效率增加,并减少钝化层对电场的耗损,本文对具宽窄视角可切换功能的液晶显示屏提出几种低功耗新设计。首先采用新型低电压液晶,在彩膜的制程顺序上做改动,并对TFT侧玻璃基板上的绝缘钝化层进行图案化减薄。减薄的设计方案有两种,一种是直接在钝化层上做部分减薄留下一些剩余厚度,另一种是用SiOx层取代钝化层的剩余厚度。设计变更后的透过率与电场特性使用了数值分析方法加以仿真。仿真结果表明:使用低电压液晶能使原有架构的饱和电压从5.4V降低到4.3V,结合减薄新设计可以分别再降低9.30%与13.95%。液晶饱和电压的降低表明节能新架构的液晶操作电压会比原有架构更低,进而面板上的整体功耗降低,达到了宽窄视角可切换低功耗液晶显示屏的需求。

Some new designs with low power consumption of hybrid viewing-angle LCD are proposed in order to increase the rotating efficiency of liquid crystal molecules by tuning electric field and to reduce the loss of electric field from passivation layer.Firstly,a new type of liquid crystal with low voltage is used.Then the sequence of process on the color filter is changed,and the insulated passivation layer on the TFT side of glass substrate is patterned and thinned.There are two schemes for thinning.One is to make partial thinning on passivation layer directly,leaving some residual thickness.The other is to replace the residual thickness of passivation layer with SiOxlayer.The characteristics of transmittance and electric field after changing design are simulated by the method of numerical analysis.These results of simulation show that the saturation voltage of this original architecture can be reduced from 5.4 V to 4.3 V by using low-voltage liquid crystal and the new design for thinning can further reduce the saturation voltage by 9.30% and 13.95% respectively.The decrease of saturation voltage on liquid crystal indicates that the operating voltage of liquid crystal on new architecture with energy-saving will be lower than that on the prior one,and then the overall power consumption of display panel will be reduced to satisfy the demand of hybrid viewing-angle LCD with low power consumption.