Optical Design and Molding Process Analysis of Ultra-Thin Light puide Plates

• Main Authors: Ue-Ting Sung, 宋昱廷
• Other Authors: Chung-Ching Huang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/83209379269635826003

碩士 === 國立高雄應用科技大學 === 模具工程系碩士班 === 95 === The Liquid Crystal Display (LCD) has been already very popular on the market; In this study, a micro-structure of 2.5” V-cut pattern flat-type light guide plate(LGP) (0.45mm in thickness) was studied and formed with plastics of optics grade Polycarbonate(PC). The surface of the micro-structure and processes condition is correlated with the mold of the micro-structure. Design parameter includes the angle, height, and density of the V-cut. The design of micro-structure is based on Non-Sequential Ray Tracing, it proceed the optical analysis to comprehend the effects of optics brightness and uniformity. An analysis is carried out to study optical design and mold design. Injection molding and injection compression molding are both introduced in the study. The main purpose was to achieve the quality of the LGP by raising the transcription of micro-structure and controlling and understand the key condition of the processes, found the relation between optical efficiency and processes. The experimental results demonstrated injection molding is necessary to set with high speed and cause high injection pressure. Under the high speed and pressure molding will cause the residual stress on the LGP. Injection compression molding can get the good agreement of molding quality.