Patent ID: 8335939

Claim:
A notebook computer comprising: a keyboard and a display; a light source arranged on the keyboard or the display; a working voltage terminal, wherein the working voltage terminal supplies a working voltage in response to the notebook computer being in a working state, and does not supply the working voltage in response to the notebook computer being in a sleep state; a standby voltage terminal, wherein the standby voltage terminal supplies a standby voltage in response to the notebook computer being in the working state or the sleep state; a sleep signal terminal, wherein the sleep signal terminal supplies a high voltage in response to the notebook computer being in the working state, the sleep signal terminal supplies a square wave signal in response to the notebook computer being in the sleep state; and a light source control circuit comprising first to third electronic switches; wherein a control terminal of the first electronic switch is connected to the working voltage terminal, a first terminal of the first electronic switch is connected to a first terminal of the light source and a first terminal of the third electronic switch, a second terminal of the light source is connected to the standby voltage terminal, a control terminal of the second electronic switch is connected to the sleep signal terminal, a first terminal of the second electronic switch is connected to the standby voltage terminal and a control terminal of the third electronic switch, second terminals of the first to third electronic switches are grounded, wherein the first to third electronic switches are turned on in response to the control terminals being in high voltage states, and are turned off in response to the control terminals being in low voltage states.