| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface light source device which does not make the size of a light transmission plate large than needed, can easily respond to the change of the number of point light sources to be used, removes the occurrence of a dark part among the point light sources and can obtain the uniform light emitting brightness. <P>SOLUTION: The surface light source device is provided with a sheet-shaped light transmission plate 1, a reflective sheet 2 disposed on the side of the reflective surface of the light transmission plate 1, a plurality of LEDs 3 disposed along an incident light side end edge surface of the light transmission plate 1, a prism sheet 5 disposed on the side of light exiting surface of the light transmission plate 1 and a reflective member 4 disposed on a surface opposite to the incident light surface of the light transmission plate 1. On the light transmission plate 1, further, crimps are formed over whole surface of the light exiting surface and the crimp density is changed locally in accordance with the arrangement of the LEDs 3. <P>COPYRIGHT: (C)2004,JPO |
