| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a display device capable of uniformizing illumination distribution of a display board without causing a loss of light volume, and an increase in assembly man-hour and a cost.SOLUTION: A display device 1 includes an LED (a light source) 2, and a display board 5 with translucency disposed at an emitting direction of light from the LED 2, where a light-source-side surface and a counter-light-source-side surface of the display board 5 are surface-textured, and a surface-texturing roughness applied to the surface on the counter-light-source side is made finer than a surface-texturing roughness of the surface on the light source side. Consequently, light from the LED 2 having high directivity is diffused by rough surface-texturing 5a formed on the light-source-side surface of the display board 5 so as to become uneven light with granular property, however, the uneven light is diffused by fine surface-texturing 5b formed on the counter-light-source-side surface of the display board 5, so that the granular property is eliminated and the illumination distribution of the display board is uniformized.</p> |
