| 摘要 |
PURPOSE: To thin it without causing luminance unevenness. CONSTITUTION: A back light 12 of this liquid crystal display device is constituted of a light diffusing plate 18 arranged on a rear surface of a liquid crystal display panel 11, fluorescent tubes 16, 17 light irradiating from the rear surface of the light diffusing plate 18, light shielding parts 14, 15 adjusting a light quantity with which the direct light of the fluorescent tubes 16, 17 irradiate the light diffusing plate 18 and a reflection plate 13 reflecting the light of the fluorescent tubes 16, 17. In such a case, since the light quantity irradiating the light diffusing plate 18 is adjusted by gradually reducing a distance between the reflection plate 13 and the light diffusing plate 18 according to approach from the peripheral part of the light diffusing plate 18 to the central part, luminance peak due to the fluorescent tubes 16, 17 is made not to appear even when the fluorescent tubes 16, 17 are approached to the light diffusing plate 18, and the occurrence of the luminance unevenness is prevented. Thus, the device is thinned without causing the luminance unevenness. |
