Patent ID: 9247618
Filing Date: 2016-01-26
CPC Classification: H05B,Y02B

Claim Text:
1. A back light brightness adjusting apparatus for adjusting a back light brightness of an electronic device comprising: a control unit configured to receive a first control signal from a display chip, and configured to output at least one of a first switch signal or a second switch signal according to the first control signal, wherein when the electronic device is turned on, the control unit is configured to output the first switch signal at a first voltage and the second switch signal at a second voltage, and the electronic device receives a first adjusting signal from a central processing unit (CPU) and adjusts the back light brightness according to the first adjusting signal, and wherein when the electronic device is turned off, the control unit outputs the first switch signal at a third voltage and the second switch signal at a fourth voltage, and the electronic device receives a second adjusting signal from the display chip and adjusts the back light brightness according to the second adjusting signal; a first adjusting unit electrically coupled to the electronic device; and a second adjusting unit electrically coupled to the electronic device; the second adjusting unit configured to receive a second control signal from the display chip.