Light Emitting Device and Method of Driving the Light Emitting Device

摘要

A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.

主权项

1. 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; andat 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; andmeans for controlling the timing 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.