| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase an amount of light in surface and lateral directions, ensure a front luminance, and enhance diffusibility of light. <P>SOLUTION: An inventive light-emitting device includes a light source and a light flux control part for controlling light emitted from the light source. The light flux control part has a light incident surface and a light emission surface. In a plane perpendicular to the optical axis of the light emitted from the light source, a region 30, where the light beam density of the light emitted from the light emission surface becomes higher as a distance from the optical axis as an origin increases, exists, and also in the above-described plane, a region 31, where the light beam density becomes lower as a distance from the point located far from the optical axis as an origin increases, exists at least in one place. <P>COPYRIGHT: (C)2012,JPO&INPIT |
