| Summary: | 碩士 === 崑山科技大學 === 機械工程研究所 === 96 === Based on the popularization and future market for LCD, the optical research of backlight modules were generally or extensively developed in academics. And the uniform distribution of brightness is the key-point of investigation. Most studies were aimed in dot patterns on Light Guide Plate （LGP）, and only few studies focused on V-Cut patterns . At present, to enhance and improve optical characteristics of the Liquid Crystal Display （LCD） has graduate become vital. We understood from the relative researches that the change design of microstructure on the light guide plate affect directly to the optical characteristic. Thus, through the simulations by optical analysis, the better efficiency of microstructure design can be obtained.
The design of V-Cut patterns on LGP surface related to the distribution of brightness are studied in this investigation. We can obtain the distribution diagram of brightness from the simulation results. The angle（θ）, pitch（P）, depth（D） and space（S） of V-Cut pattern are changed in experiment. By comparing of the distribution of brightness for dot pattern and V-Cut pattern , the results show that whatever angle of V-Cut changed, the larger the pitch of V-Cut larger , the more uniform whole distribution of brightness and the lower brightness will be obtained ; the brightness of saw-like micro-structure with front slope is lower than that of back slope type ; but the saw-like micro-structure with front slope is more uniform；phenomena of light centralization on in-light side for back slope type is more severed than that of front slope type. The present results provide better microstructure design of the BLM for LCD light guide plate with microstructure.
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