| 摘要 |
PURPOSE:To surely prevent a high luminance part (bright line) from appearing at the end of the light emitting surface on a light source lamp side without causing disadvantage in the miniaturization of a light transmission plate device and without possibility that the luminance of the entire light emitting surface of a light transmission plate is lowered. CONSTITUTION:This light transmission plate device is provided with the light transmission plate 11 whose one surf ace is set as the light emitting surface 12 and whose other surface is set as a reflection surface 13; the light source lamp 24 is installed outside the end face 25 of the plate 11; a lamp reflector 31 is installed to surround the outer periphery of the lamp 24; the light from the lamp 24 is reflected by the lamp reflector 31 and made incident from the end face 25 of the plate 11; and the light made incident on the plate 11 is reflected by the reflection surface 13 so as to allow the light emitting surface 12 side to emit the light. A curved reflection part 33 curved to be projected toward a space between the end face 25 of the plate 11 and the lamp 214 is installed on the reflection surface 13 side of the lamp reflector 31. |
