| 摘要 |
A light guide plate ( 100 ) includes an incidence surface ( 101 ), an emission surface ( 102 ) and a reflection surface ( 103 ) opposite to the emission surface. Numerous recesses are formed on at least one of the three surfaces according to a predetermined pattern. Some recesses have angular cross-sections and can determine a direction of emission of light beams, and the other recesses have arcuate cross-sections and can determine the degree of uniformity of the emitted light beams. Therefore, the light beams can be emitted from a predetermined region of the light guide plate, and this ensures the emission light beams with improved uniformity and brightness. Thus the light guide plate can be advantageously applied in back light systems of liquid crystal display devices. A method for manufacturing the light guide plate is also provided.
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