Repairing methods of pixel structure and organic electro-luminescence displaying unit

1. A method for repairing a pixel structure, comprising:

providing a pixel structure electrically connected to a scan line, a data line and a power line, the pixel structure comprising a current control unit, a pixel electrode electrically connected to the current control unit and a redundant active device, the current control unit being electrically connected to the scan line, the data line and the power line, the current control unit comprising a first active device, a second active device and a capacitor, the first active device having a first gate, a first source and a first drain, the first gate being electrically connected to the scan line, and the first source being electrically connected to the data line, the second active device having a second gate, a second source and a second drain, the second gate being electrically connected to the first drain, the second source being electrically connected to the power line, and the second drain being electrically connected to the pixel electrode, the capacitor being electrically connected between the second gate and the power line, the redundant active device being electrically connected to the pixel electrode and the current control unit and being electrically insulated from the power line, the redundant active device having a third gate, a third source, and a third drain, the third gate being electrically connected to the first drain, the third source being electrically insulated from the power line, and the third drain being electrically connected to the pixel electrode;

cutting an electrical connection between the second source and the power line; and

electrically connecting the power line to the third source of the redundant active device, so that the current control unit and the redundant active device control the current provided by the power line.

2. The method of claim 1 , wherein the electrical connection between the current control unit and the power line is cut through laser cutting.

3. The method of claim 1 , wherein the power line and the redundant active device are electrically connected through laser welding.

4. A method for repairing an organic electro-luminescence display unit, comprising:

providing an organic electro-luminescence display unit electrically connected to a scan line, a data line and a power line, the organic electro-luminescence display unit comprising a current control unit, a pixel electrode electrically connected to the current control unit, a redundant active device an organic electro-luminescence layer disposed above the pixel electrode and an electrode layer disposed above the organic electro-luminescence layer, the current control unit being electrically connected to the scan line, the data line and the power line, the current control unit comprising a first active device, a second active device and a capacitor, the first active device having a first gate, a first source and a first drain, the first gate being electrically connected to the scan line, and the first source being electrically connected to the data line, the second active device having a second gate, a second source and a second drain, the second gate being electrically connected to the first drain, the second source being electrically connected to the power line, and the second drain being electrically connected to the pixel electrode, the capacitor being electrically connected between the second gate and the power line, the redundant active device being electrically connected to the pixel electrode and the current control unit and being electrically insulated from the power line, the redundant active device having a third gate, a third source, and a third drain, the third gate being electrically connected to the first drain, the third source being electrically insulated from the power line, and the third drain being electrically connected to the pixel electrode;

cutting an electrical connection between the second source and the power line; and

electrically connecting the power line to the third source of the redundant active device, so that the current control unit and the redundant active device can control the current passing through the organic electro-luminescence.

5. The method of claim 4 , wherein the electrical connection between the current control unit and the power line is cut through laser cutting.

6. The method of claim 4 , wherein the power line and the redundant active device are electrically connected through laser welding.