| 摘要 |
PURPOSE: A structure and manufacturing method of an electronic sign board for protecting diffused reflection are provided to improve the durability by using a diffused reflection pad of urethane material as a black filter. CONSTITUTION: An LED panel(10) has a panel case in which a plurality of LEDs which are mounted in a matrix. A diffuse reflection pad(20) is laminated on the top of the LED panel and has holes of inverse triangle corresponding to the number of LED. A sunshade(30) forms holes corresponding to the number of LED and a sun cap is laminated on top of the diffuse reflection pad. |
