System and method for reduced standby power consumption in a display device
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United States of America Patent
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Feb 20, 2001
Grant Date -
N/A
app pub date -
Sep 22, 1999
filing date -
Sep 22, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system and method for reduced standby power consumption in a display device. In one embodiment, a circuit for power mode switching between a main mode and a standby mode of a display device is provided. In this embodiment, the circuit includes a power supply unit coupled to a power source for receiving an input power signal and for generating output power signals when the display device is in the main mode. The circuit also includes an opto coupler coupled to a computer and responsive to a sync signal therefrom. The opto coupler is also coupled to the power supply unit for selectively sending an OFF signal thereto when the opto coupler does not detect the sync signal from the computer. Moreover, in this embodiment, the power supply unit shuts down and stops generating the output power signals in response to the OFF signal, thereby switching the display device to the standby mode. Thus, in this embodiment, no switching loss is incurred by the power supply unit and the standby power consumption of the circuit is minimized. In one embodiment, the power supply of a display device implemented in accordance with the present invention dissipates less than 1 watt of power during standby mode.
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