| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate whose emission surface has uniform brightness, and capable of effectively using light. <P>SOLUTION: The light guide plate having light sources arranged on the sheet end face as a light entry part is formed in an approximately disc shape. The light diffusing force of the light guide plate is gradually greater as tending from the end toward the center, and the light sources are arranged at three or more positions on the end face of the light guide plate at approximately equal intervals. With the light sources arranged at three or more positions around the approximately disc shape at the approximately equal intervals and in-plane diffusing force gradually greater toward the center, in-plane brightness is uniformed for effectively use of light from the light sources. <P>COPYRIGHT: (C)2011,JPO&INPIT |
