Patent ID: 7973743
Filing Date: 2011-07-05
Classification: G09G

Abstract:
1. A light emitting display device comprising: a plurality of data lines, extending in one direction, for transmitting data currents; a plurality of signal lines, crossing the data lines, for transmitting scan signals; a plurality of pixel circuits coupled to the data lines and the signal lines, each said pixel circuit formed at an area where a corresponding said data line and a corresponding said signal line cross each other, the plurality of pixel circuits for displaying an image corresponding to the data currents, each pixel circuit comprising a first transistor for supplying a current to the light emitting element; a data driver for transmitting the data currents to the data lines; and a precharger for supplying precharge currents to the data lines in response to a control signal, which is applied thereto, wherein the precharger is configured to supply each said precharge current having a magnitude that varies proportionally to a magnitude of a corresponding said data current, the precharger comprising a second transistor for supplying a current corresponding to the corresponding said precharge current to the corresponding said data line, wherein the first transistor and the second transistor are configured as a current mirror to supply the precharge current to the data lines prior to said current being supplied to the light emitting element, and wherein the second transistor is configured to supply a majority portion of the precharge current and the first transistor is configured to supply a remaining portion of the precharge current.