| 摘要 |
PROBLEM TO BE SOLVED: To improve contrast without damaging brightness by having an opening corresponding to each pixel on the front surface of a plasma display panel, and providing a light control plate having a light-reflecting surface on its discharge cavity side and a light-absorbing surface on its front surface side. SOLUTION: A light control plate 4 is inserted between a surface glass bard 11 and cavities 17 of a plasma display panel, having the cavities 17 in which gas for causing a fluorescent coating 15 to emit light, is sealed. The cavity 17 side of the light control plate 4 is a high reflectance surface 5, and the opposite front surface side is a light-absorbing surface 6. Respective light-transmitting holes 7 are opened at positions corresponding to the centers of the cavities 17. External light going into the surface glass board 11 is absorbed by the light-absorbing surface 6 of the light control plate 4, and is hardly reflected to the front surface side. Where as because the light emitted from fluorescent coating 15, after reflecting repeatedly on the high reflectance surface 5 and the inner surfaces of the cavities 17, or directly passes through the light transmission holes 7, it then goes out to the front surface, so that small light transmitting holes 7 causes light to go out efficiently. |
