Patent ID: 7176857

Claim:
A light emitting device comprising; a panel comprising: a pixel portion in which a plurality of pixels are arranged in matrix; a source signal line driver circuit for driving the pixel portion; and at least two gate signal line driver circuit for driving the pixel portion; means for generating a timing signal and an image signal for driving the source signal line driver circuit and the gate signal line driver circuit; and means for supplying a desired electric power source used in the panel, each pixel of the plurality of pixels comprising: a light emitting element having a first electrode and a second electrode; means for controlling input of the image signal to the pixel; means for determining whether the light emitting element emits light or does not emit light, in accordance with the input image signal, for applying a forward bias between the first electrode and the second electrode of the light emitting element by changing an electric potential of the first electrode when the light emitting element emits light, and for supplying an electric current; means for forcibly cutting off the electric current supplied to the light emitting element; and means for controlling the tuning at which a reverse bias is applied between the first electrode and the second electrode of the light emitting element by changing the electric potential of the first electrode.