| 摘要 |
There is provided an image display device which is kept from wastefully consuming electric power while an eyelid is closed by blinks in a waking state. A signal from an FIR sensor (14) is inputted to a positive (+) terminal of a comparator (32) via an amplifier (31) while a threshold (Th) is inputted to a negative (−) terminal of the comparator (32). When an eyelid (1) is closed more than necessary to block all the field of view, a level of the signal inputted from the FIR sensor (14) to the positive (+) terminal of the comparator (32) is higher than the level of the threshold (Th). Thus, a high-level signal is outputted from the comparator (32) and a low-level signal is inputted to a driver (34) via an inverter (33), so that the driver (34) turns off a backlight (12). |
