| Summary: | 碩士 === 國立中央大學 === 機械工程研究所碩士在職專班 === 95 === LED (Light Emitting Diode) of 7" backlight module is used as the researching object in this paper. It is chosen because that it is the most developed, common and widely used in all kinds of the commercial medium sized panels in nowadays. In this paper, experimental measuring method was used. The effect of working parameters on the luminance performance of 7" backlight module is investigated. These parameters, however, includes the number of LEDs used, LED’s luminance, thickness of light guide and the number of prism used. Further, by considering the luminance performance and manufacturing cost, choosing the best combination of materials. Not only the luminance can reach the specification, but also the materials selected can be made in consideration of the economic profit.
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