Currently, smart phone and table pc like I phone and I pad with touch pad are main trend in the mobile market. Using touch pad, display image is distorted by external pressure with touch pen and fingers. Because such defects, improvement of pressure resistant characteristic by external pressure (Trace mura) is became more important factor. To solve the problem, we studied pressure resistant characteristic by rubbing uniformity, alignment anchoring force, rotational viscosity of liquid crystal and pixel electrode length of domain structure. Through these experiment results, we have found the design of improving pressure resistant characteristic (Trace mura). Low rotational viscosity of liquid crystal shows stronger pressure resistant characteristic than high rotational viscosity of liquid crystal and as the length of pixel electrode is shorter, pressure resistant characteristic (Trace mura) is good. It is much advantageous for touch pad display field.

In automotive display field, it requires higher black luminance uniformity because of the high brightness, large size of panel which shows mostly black background. In this paper, we analyzed and classified the types of light leakage in black picture, found the key factor of influencing the black luminance uniformity, and optimized the black uniformity performance from the aspects of design and materials finally obtained the high black uniformity value for LCD panels in TLCM.

Automobile displays require special color performance, such as dominant wavelengths (λ dom ) of red, green, and blue (RGB), saturation levels (Sat) of RGB, and white (W) coordinates. In this paper, the authors optimize color filter (CF) resin, backlight unit (BLU), and design parameters for a liquid-crystal display (LCD) in order to improve color performance without white calibration.

Theoretical models of temperature assessment are important to design a product in a low‐temperature field, and they can be used to predict the heating effects and optimize temperature uniformity to improve the display performance. In this paper, equations and finite element analysis model between temperature and time were built by heat transfer theory and experimental data. The errors between the calculated results of two models and the values measured in the lab are within ±1.5°C. The temperature uniformity was promoted by the results of Python simulation based on the finite element analysis model. Both two models could take on guidance for product design.