Patent ID: 7755612

Claim:
A display device comprising: a display panel; a lighting unit adapted to illuminate the display panel in response to receipt of a lighting control signal; a pressure sensing unit adapted to generate a first sensor output signal in response to a touch on the display panel; a light sensing unit positioned to receive light from the lighting unit and ambient light and in response thereto to generate a second sensor output signal in response to a touch on the display panel; a sensor scanning driver adapted to generate and supply sensor scanning signals to the pressure sensing unit and to the light sensing unit in response to receipt of a sensor scanning control signal; and a signal controller being operable to generate the lighting control signal and the sensor scanning control signal in response to receipt of the first and the second sensor output signals, the signal controller being further operable to transmit the lighting control signal and the sensor scanning control signal to the lighting unit and the sensor scanning driver, respectively, the signal controller comprising: a pressure calculation unit being operable to generate a pressure information signal in receipt of the first sensor output signal; a position calculation unit being operable to determine where a touch occurred to generate a position information signal in response to the second sensor output signal; and a sensing controller, wherein the sensing controller receives the pressure information signal and the position information signal and generates the lighting control signal in response to a failure to detect the touched position in the received position information signal.