Design of high-quality TFD-LCDS

The design of high-quality thin-film diode liquidcrystal displays (TFD-LCDs), which are candidates for low-cost displays, was studied and 9.3-inch panels were designed and fabricated. the image quality was then investigated. the TFD structure and area, SiNx deposition conditions, the thickness of the SiNx film, and the driving conditions are the main TFD-LCD design parameters. the SiNx deposition conditions and the film thickness had already been optimized and fixed prior to our study. In this study, the TFD area and the bias ratio were first investigated by means of a simulator. This showed that the TFD area and the bias ratio must have optimum values in order to satisfy the response time, contrast ratio, and reliability requirements of high-quality displays; 9.3-inch color TFD-LCDs have been designed and fabricated. the TFD structure is of the bridge type. the TFD area is 64 μm2 and the bias ratio is 1:9. the panels use a scan line inverse driving method. the image quality is the same as predicted in the simulation and good enough for high-quality displays.