| 摘要 |
PROBLEM TO BE SOLVED: To improve display contrast on the surface side of a translucent reflection plate by superposing a louver type filter on the back side of the translucent reflection plate. SOLUTION: A louver type filter 16 is superposed on the back side of a translucent reflection plate 12. For example, when an object of high brightness or an outdoor daylight 18 such as the sun light is on the background of the translucent reflection plate 12 and the outdoor daylight is passed through the louver type filter 16 and the translucent reflection plate 12 and made incident on an eye point 19, the display contrast of a display image reflected on the translucent reflection plate 12 is lowered by brightness of the back part of the louver type filter 16. At such time, by a little raising or lowering the slant angle of the translucent reflection plate 12 fitted with the louver type filter 16, the outdoor daylight is intercepted by the respective louvers 17, and the incidental light on the eye point 19 can be restrained. Then, the back brightness of the louver type filter 16 is lowered, the display contrast of the display image reflectingly displayed on the translucent reflection plate 12 is intensified, and the visibility is improved. |
