Minoru Shibazaki

8.4: Transflective LCD with Low Driving Voltage and Wide Viewing Angle

A 3.8-inch transflective thin-film-transistor liquid crystal display TFT-LCD with a wide viewing angle that enables operation over a small driving voltage range between 1.5V and 4.0V has been developed. This is achieved by optimizing the retardation of the LC layer and the parameters of the compensation film, which minimizes a viewing angle dependence of the total retardation of the LC layer and the compensation films.

New Concept of the Wide Viewing Angle Liquid Crystal Display without Grayscale Inversion

We analyzed the grayscale inversion mechanism of birefringent-type liquid crystal displays (LCDs). As a result, we propose a new LCD that prevents grayscale inversion, without using the multidomain alignment method. In addition, using this new method, we established the design rules for a compensation film that can compensate for the retardation of the black state from any viewing angle. We call this new LCD the OCP cell, which is an abbreviation for optically compensated parallel cell. This OCP is very promising as a next-generation LCD, due to its wide range of viewing angles, simple fabrication process, which is almost the same as that for a twisted nematic (TN) cell, and large aperture ratio.

57.5L: Late‐News Paper: MVA Mode with Improved Color‐wash‐out for Mobile Application

In this paper, we describe a new MVA technology for wider viewing angle. The MVA mode has a color-wash-out issue when the panel is seen from a large viewing angle. In order to solve this, we have optimized a halftone-grayscale method for MVA mode. We have also developed a new pixel structure with an ITO etched pattern on the CF side for transmissive panels. As a result, we have obtained a better viewing angle performance with less color-wash-out.