Image display device
AssigneeSharp Kabushiki Kaisha
InventorTakehisa Ishihara
Life of this patent
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Abstract
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).
Claims12
An image display device comprising:
- an image display section;
- a sensor for detecting opening/closing operation of an eyelid of an observer who observes the image display section;
- and
- a control unit for, upon receiving a signal from the sensor, exerting control to turn off the image display section on condition that the observer's eyelid is kept closed to an extent equal to or more than a predetermined certain value.
Dependencies are inferred from the claim text.