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Recently TFT LCD industry got a lot of attentions from public, due to its characteristics such as slim, light weight, no radiations. Originally it was used on the mobile phones, the digital still camera and PDA and now expands to mobile TV, car AV terminals, notebook computers and the any appliance which needs to 「display」. Thanks to the TFT LCD firms continually work to overcome the patent limitations and go through the technology bottlenecks. Besides the TFT makers, the backlight module manufactures also do their works to improve the LCD quality. Since the TFT LCD could not emit light by itself, it needs a uniform, robust and bright backlight source to light it on. A backlight module is the second high cost unit and consumes to a LCD appliance consumes the highest electrical power in a LCD appliance. Also its shape, optical characteristics and duty life determine the LCDs』. Meanwhile, it could help the LCD appliance to improve its gamut, brightness, contrast and view angle. Backlight modules are the key components of LCD appliances. The notebook computers』 backlight modules are the most challenge area in this industry, due to its requirements are slim, light weight and low power consumption. To comply these requirements, the engineers can only use slim LGPs, thickness < 3 mm, and less number of light sources. Since the new solid light source, LED, shows its advantages such as slimmer, light weight, lower power consumption and higher directivity compared to the traditional one, CCFL, there are more and more engineers adopt these new light sources as their backlight modules』 sources to achieve a new level that can not be done by CCFL. Sony and ASUS have already provided their LED notebooks to public and lead the vogue which the others chase. This thesis mainly studies the feasibility of the large size, thin thickness notebook BLU which adopts the LED as its light source. The included topics are how the surface microstructure of LGPs does influence the propagation and the exit angle of light and its extraction efficiency. Also the various film configurations, entrance surface textures and the new ways to put the LED sources are considered.
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