Patent ID: 8581898

Claim:
A display device, comprising: a display panel, comprising a plurality of display pixel cells and a plurality of redundancy pixel cells; a gate driver circuit, connected to the display panel via a plurality of scan lines; a source driver circuit, connected to the display panel via a plurality of data lines, wherein a first display pixel cell of the display pixel cells is connected to a first data line of the data lines and a first scan line of the scan lines, a first redundancy pixel cell of the redundancy pixel cells is connected to the first data line and a redundancy scan line; a timing control circuit, connected to the gate driver circuit, the source driver circuit and the display panel, for controlling operations of the gate driver circuit and the source driver circuit to drive the display panel, wherein when the display device enters a compensation mode, the timing control circuit controls the gate driver circuit to generate a first scan signal to the first scan line and the redundancy scan line, so as to simultaneously activate the first display pixel cell and the first redundancy pixel cell; at least one current detection circuit, connected to the timing control circuit, the first display pixel cell and the first redundancy pixel cell, for simultaneously detecting working currents respectively outputted from the first display pixel cell and the first redundancy pixel cell in response to a select signal from the timing control circuit when the display device enters the compensation mode, and then detecting a difference between the working currents respectively corresponding to the first display pixel cell and the first redundancy pixel cell, so as to output a detection result relating to the difference to the timing control circuit; and a programmable voltage generator, connected to the timing control circuit and the source driver circuit, wherein the timing control circuit controls the programmable voltage generator to output a plurality of programmable data voltage signals to the source driver circuit according to the detection result, so as to compensate the working current corresponding to the first display pixel cell and steady the working current corresponding to the first display pixel cell.