Patent ID: 11868190
Assignee: SHARP NEC DISPLAY SOLUTIONS, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 9:
10. A power supply method of a display device having a liquid crystal panel and a power lamp, the display device comprising:
a controller that controls a display of the liquid crystal panel based on a power supplied from an external device and controls a lighting of the power lamp based on a reference voltage;
a first switch that supplies the power to the controller, the power being supplied from the external device via a predetermined connector;
a voltage detection circuit that generates the reference voltage;
a second switch that supplies the reference voltage to the power lamp and the controller; and
a second controller, wherein
the second controller determines whether or not the power meets a condition for establishing negotiation with the external device, and turns on one of the first switch and the second switch according to a result of the determination.