| 摘要 |
A light guide plate (200) for use in a backlight system includes a light incident surface (201), a light exit surface (202), and a bottom surface (203) opposite to the light exit surface. The bottom surface has a multiplicity of hemispherical pattern-dots (204) provided thereon, which are arranged in a regular manner. A projection of each pattern-dot on the bottom surface is circular, and each pattern-dot has a height (D) less than a radius (r) of the circle. Preferably, a height-to-radius ratio of each pattern-dot varies in the range from 0.067~0.86. Thus the brightness of light beams transmitting out from the light exit surface is enhanced. Other embodiments of the light guide plate are also detailed herein.
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