Patent ID: 8035580

Claim:
An electro-luminescence display panel implementing a gray level by a combination of light-emitting periods of sub-frames corresponding to each bit of video data, wherein each pixel comprises: an electro-luminescence (EL) cell; and a cell driver for allowing a forward current to flow into the EL cell in accordance with a supplied data signal in a light-emitting period of a sub-frame while allowing a backward bias voltage to be applied to the EL cell in a non-light-emitting period of the sub-frame, wherein the cell driver comprises, a storage capacitor having a first electrode connected to a power line, a first switching transistor connected between a data line supplying the data signal and a second electrode of the storage capacitor to be controlled by a writing scan line supplying a writing signal, a second switching transistor connected to the power line and the second electrode of the storage capacitor to be controlled by an erasing scan line supplying an erasing signal, the erasing signal varies between a high and low voltage, wherein the erasing signal allows a backward bias voltage to be applied to the El cell when the erasing signal is at a low voltage, a driving transistor connected between the power line and the EL cell to be controlled by the storage capacitor, and a backward bias transistor connected between the driving transistor and the erasing scan line, wherein the second electrode of the storage capacitor is directly connected to a gate of the backward bias transistor and a gate of the driving transistor to drive the storage capacitor in opposition to the driving transistor.