A Plate+C Plate可补偿IPS-LCD的大倾斜视角。通过光学软件理论模拟出λ/4+C Plate波片结构中所需厚度方向位相差Rth的数值区间, 再实验制作出不同的+C Plate补偿膜, 将此补偿膜与λ/4波片制成复合薄膜, 再将此复合薄膜应用到IPS-LCD显示屏上, 研究其不同Re和Rth的复合薄膜对IPS-LCD黑态漏光的补偿效果。具体研究了在常见的3种不同液晶盒厚情况下, 复合薄膜的Re和Rth对IPS-LCD离轴黑态漏光的影响, 从中得出了IPS-LCD离轴漏光A+C补偿优化组合, 尤其, Rth=60 nm、Re=140 nm的λ/4+C Plate对4 μm盒厚的IPS-LCD起到很好的大视角漏光补偿表现。

The combination of A Plate and C Plate can improve the visual angle of IPS-LCD. This paper studies the improvement in axis-off light leakage of in-plane-switching(IPS) liquid crystal display(LCD) using a laminated film of a λ/4 wave plate and a +C compensation film. According to theoretical investigation and experimental verification, this paper investigates the compensation phenomenon of laminated film in axis-off light leakage of IPS-LCD with different cell gap. An optimized combination of retardation value can be obtained. Especially, the λ/4+C plate with Rth=60 nm and Re=140 nm can improve greatly the visual angle of IPS-LCD which is 4 μm gap.