Patent ID: 8487967

Claim:
An active matrix display device which comprises a plurality of pixels arranged in a matrix and a backlight source disposed at the backside of the matrix and emitting light to the matrix, wherein each of the pixels comprises: a liquid crystal element; a driving controlling switch for controlling the driving of the liquid crystal element; and a storage capacitor for storing image data provided to the liquid crystal element through the driving controlling switch; wherein the display device further comprises: a luminance detector for detecting luminance of the backlight source; a first voltage supplier, wherein according to the detected luminance of the backlight source, the first voltage supplier, in a sustain period of the image data, provides a predetermined voltage to a node of the storage capacitor which is opposite to a node of the storage capacitor coupled to the liquid crystal element; and a temperature detector for detecting temperature; wherein the first voltage supplier comprises: a variable voltage supply source; a voltage calculator for calculating the first predetermined voltage according to the detected luminance of the backlight source by the luminance detector; and a voltage source controller for controlling the variable voltage supply source which provides the first predetermined voltage which is calculated by the voltage calculator; wherein the voltage calculator calculates the first predetermined voltage according to the luminance of the backlight source detected by the luminance detector and the temperature detected by the temperature detector.