| 摘要 |
PROBLEM TO BE SOLVED: To provide a knob backlighting device which is capable of backlighting many knobs with one light source and is high in utilization efficiency of the light emitted from a light source. SOLUTION: This device is provided with a backlighting plate 4 having respective refractive surfaces 4a, 4b, 4a and 4b for guiding the light emitted from the one light source 3 to the respective knobs to backlight the plural knobs 1a and 1b with the one light source 3. |
