| 摘要 |
A light guide plate (30) includes two opposite incident surfaces (31) for receiving light beams, an emitting surface (32) joining the two incident surfaces and a bottom surface (33) opposite to the emitting surface. The emitting surface has a V-shaped profile defined by two symmetric oblique plates (321, 322) slanting down toward each other at a predetermined angle. The surface light source incorporating the light guide plate is inexpensive and has higher intensity of illumination at the center region thereof. Thus a liquid crystal display incorporating the surface light source satisfactorily illuminate a main visible range thereof.
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