| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device capable of preventing luminescence unevenness, while being miniaturized.SOLUTION: A lighting device includes: a nearly rectangular light guide plate (10) arranged in such a manner that an incident surface incident with light and an emission surface for irradiating guided light are arranged to be nearly orthogonal to each other; a point light source (20) arranged to face the incident surface; and a finder internal liquid crystal display device (30) for displaying nearly rectangular imaging information. The emission surface is treated with mat processing having a light diffusion effect. The surface opposite to the emission surface is arranged with a reflection surface treated with a Fresnel shape. The side face of the finder internal liquid crystal display device is arranged to face the emission surface of the light guide plate, and a portion inside the emission surface is provided with a protrusion protruded further than the periphery. The protrusion, when viewed from the normal line of the emission surface, has a nearly rectangular shape. The protrusion is arranged within the range of the display area of the finder internal liquid crystal display device.SELECTED DRAWING: Figure 3 |
