| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable to irradiate a uniform volume of light on a whole translucent member arranged on an upper surface side of a light guide plate. <P>SOLUTION: A light guide plate holding part 31 and a pair of light source unit holding parts 32, 33 are formed on a holder 3 arranged below a translucent member 2. The light source unit holding parts 32, 33 are formed in a rotationally symmetrical shape to pinch right and left sides of the light guide plate holding part 31. A pair of light source units 5 housed in each of the light source unit holding parts 32, 33 are arranged at rotationally symmetrical positions mutually by pinching the light guide plate housed in the light guide plate holding part 31. Even if light in a condition having a peak of the light volumes at a position biased to one side in a longitudinal direction is irradiated from each of the pair of light source units 5, 5, the volume of incident light is complemented at each position in a longitudinal direction on end surfaces 4A, 4B inside the light guide plate, and nearly a uniform volume of incident light is secured on a whole surface of the light guide plate 4. <P>COPYRIGHT: (C)2012,JPO&INPIT |
