| 摘要 |
Disclosed is a liquid crystal display device including a liquid crystal panel 20 equipped with a plurality of light sensors, a white backlight 31, and an infrared backlight 32. The infrared backlight 32 is turned ON and OFF at a prescribed timing. Some of the light sensors detect light when the infrared backlight 32 is ON, and other light sensors detect light when the infrared backlight 32 is OFF. The white backlight 31 turns OFF for light sensors conducting the light detection. Thus, the effective range of the light sensors included in the display device can be widened.
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