Liquid Crystal Display Applications With A Wide Viewing Angle Film

Liquid Crystal Display (LCD) has been used more and more extensively as a mainstream flat panel display technology. Since the first LCD was invented, much endeavor has been made to improve its performance. Though modern technology can satisfy the basic requirement of people, the problem of viewing angle of LCD has not been solved perfectly. The main task of this thesis is to design the Wide View Films for LCD and to present new applications of LCD.Using Finite-Difference Iterative Method to calculate the liquid crystal director distributions, and A. Lien's Extended Jones Matrix Method to calculate the opto-electronic property of LCD, a LCD computer simulation program was developed. Besides, the singular-point problem of A. Lien's method was studied and a simple means was put forward to solve it, so that this method can be used in the uniaxial layer with any optic axis direction.In third chapter, the problem of LCD's viewing-angle and the technologies to improve it is studied. Based on the established opto-electronic property simulation program of LCD, an auto-optimization computer program to design wide viewing-angle films for LCD is developed. Finally, the designed results of wide viewing-angle films for vertical alignment LCD and horizontal alignment TN-LCD are offered. According to the simulation, the designed wide viewing-angle films can improve the contrast to 10 in almost the whole 60 degrees cone.Two novel applications of LCD are reported in the second part of this thesis. The first is the application of LCoS in the visual-light optical target simulator. We established a LCoS simulator used as the image source in the auto-pursuit simulation system. LCoS technology can avoid the flicker problem of CRT and the bright peak problem of DLP. It was proved by the experiments that LCoS is an ideal choice for visual-light optical target simulator. Besides the C-type WV Films for LCoS were designed by the computer program. This kind of WV Films can improve the total property of the LCoS projection system. This project has great innovation and guidance and offers powerful and meaning preference for the development of auto-pursuit simulation technology.The second is a novel physical-optic experiments platform based on the LCD and computer generated hologram (CGH) technology. Not only the recurrence of hologram, the validation of hologram properties, the LCD related experiments, the traditional intervene and diffraction experiments can be done on this platform, but more other optical experiments can also be developed in future. So it is a multi-function physical-optical experiments platform. It has been commercialized.Summarization of this thesis and advice for the future work are made in the last chapter.