Patent ID: 8330677
Filing Date: 2012-12-11
Classification: G09G

Abstract:
1. An organic electro-luminescent display device comprising: a plurality of pixels, the pixel having an electro-luminescent element that emits light according to an amount of current supplied thereto; a first switching element that switches a data voltage from a data line in response to a scan signal from a gate line; a second switching element that adjusts the amount of current supplied to the electro-luminescent element according to the data voltage switched by the first switching element; and a polarity controller that applies a voltage having a value between a minimum value and a maximum value of the data voltage to a source terminal of the second switching element that varies a polarity of a gate-source voltage of the second switching element according to the data voltage applied to a gate terminal of the second switching element, wherein the voltage from the polarity controller is a direct current (DC) voltage which has the same level as that of a data voltage corresponding to a gray scale having a highest level in a gray scale zone that is less than 30% of an entire gray scale zone predefined according to data voltages.