Wideband and wide-view circular polarizer for a transflective vertical alignment liquid crystal display

Abstract

We propose an optical configuration for a transflective mode with a circular polarizer for the vertical alignment liquid crystal cell, which can show the wideband property of high contrast in oblique incidence. The proposed configuration consists of a biaxial film and two uniaxial films for satisfying both the transmissive and the reflective modes. Optimization of the optical configuration of the circular polarizer has been performed on the Poincaré sphere in the entire visible wavelength range using the Stokes vector and the Mueller matrix method. We also verify the excellent optical characteristics of the proposed configuration by comparing the viewing angle and contrast ratio in the oblique direction with a conventional optical configuration in calculation.

Simulation study of single‐cell‐gap transflective liquid crystal display with nonuniform potential

“…A VA negative LC layer is sandwiched between the top substrate and bottom dielectric layer; the cell gap d is uniform throughout all the pixel area. In order to achieve a relatively better dark state in the R region, on each side of the TR‐LCD panel, a broadband half‐wave plate and quarter‐wave plate together with a linear polarizer and analyzer works as a circular polarizer . Additionally, a negative C‐plate is adopted to partially compensate the phase retardation from the VA negative LC layer .…”

“…In order to achieve a relatively better dark state in the R region, on each side of the TR-LCD panel, a broadband half-wave plate and quarter-wave plate together with a linear polarizer and analyzer works as a circular polarizer. [26][27][28][29][30][31][32] Additionally, a negative C-plate is adopted to partially compensate the phase retardation from the VA negative LC layer. 33 The top polarizer is crossed to the bottom one.…”

Optimal design of quarter-wave plate with wideband and wide viewing angle for three-dimensional liquid crystal display

“…In order to avoid the optical deterioration of the circular polarizer in the oblique direction, we propose the application of a biaxial film and a C-plate to the wideband circular polarizer. 15,16 Therefore, we apply a k/4 A-plate, a biaxial k/2 plate, and a positive C-plate to the FPR system and optimize the optical configuration of each film in order to obtain excellent 3D characteristics. Figure 3 shows the optical structure of the FPR system using a k/2 biaxial film in place of the k/2 A-plate and using a positive C-plate on the patterned k/4 A-plate.…”

The polarization properties of a tilted polarizer

“…The physical implementation of such polarizing elements can be very different according to the application the device is designed for. For example, the liquid crystal display (LCD) industry has refined their polarizer design over the past decades to achieve the outstanding performance that these devices show today [1][2][3].…”