| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light source device using a light guide plate having a superior uniformity of light emission and superior light emission efficiency, and in which a mechanical stress caused by thermal expansion of the light guide plate against the light source arranged on both end sides of the light guide plate can be suppressed. <P>SOLUTION: The light source device includes: a light guide plate 3 for introducing light from the light source through opposing both end faces 25a, 25b and for emitting the light from a side face; LEDs 1a, 1b which are the light sources respectively arranged on both end sides of the light guide plate 3; a cabinet 4 for housing the LEDs 1a, 1b, and the light guide plate 3; and screws 10a, 10b that serves as a light guide plate fixing mechanism in which the light guide plate is pressed from the cabinet side to be fixed to the cabinet 4. In the light guide plate 3, the side face has a longer length than the width of the end face, while the size of the end face is constituted larger than that of the light-emitting part of the light source. The light guide plate 3 includes a diffused reflecting mechanism in which diffused reflectivity becomes larger as a distance from the end face increases. <P>COPYRIGHT: (C)2009,JPO&INPIT |
