Patent ID: 8625241

Claim:
A video apparatus comprising: an interface unit configured for transmitting a video signal; a display screen configured for displaying a video image corresponding to the video signal; a video circuit connected between the display screen and the interface unit, wherein the video circuit comprising: a display circuit configured for switching the video apparatus to a video input mode in response to a user's operation, receiving the video signal transmitted from the interface unit, and further blocking specific component of the video signal; and a compensation circuit connected to the display circuit, configured for adding a predetermined amount of direct current to the video signal; wherein the display circuit comprises a video switcher connected to a power supply, configured for switching the video apparatus into the video input mode in response to the user's operation, wherein the video switcher has a predetermined permitted voltage range, the display circuit further comprises a first capacitor, a first resistor, a second resistor, a second capacitor, and a video driver, the first capacitor, the video switcher, a first resistor, and a second capacitor are connected between the interface unit and the video deriver in serial, and the second resistor is connected to a junction where the second resistor is connected to the second capacitor and ground.