| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate that performs a uniform illumination by suppressing brightness and darkness in a wide range on an emitting face without using a diffusion plate. <P>SOLUTION: The light guide plate 10 includes a light guide body 11 in which light from a light source 20 enters from an end face 11a, a plurality of protrusions 12 which are formed projecting to an outgoing side of the light guide body 11 and emit light guided in the light guide plate body 11, and a plurality of reflection parts 13 which are formed in a plurality of groove shapes in parallel so as to cross the light guide direction X on an opposed face opposing on the outgoing side of the light guide body 11, and reflect the light toward the protrusions 12. The protrusions 12 have first protrusions 121 which are formed in a near area E1 of the end face 11a and second protrusions 122 formed in a far area E2 separated further from the end face 11a than the near area E1. The number of the reflection parts 13 mutually opposed to the second protrusions 122 is made larger than the number of the reflection parts 13 mutually opposed to the first protrusions 121, and the amount of light emitted from the second protrusions 122 is made more than the amount of light emitted from the first protrusions 121. <P>COPYRIGHT: (C)2010,JPO&INPIT |
