Patent ID: 7742021
Filing Date: 2010-06-22
Classification: G09G

Abstract:
1. An organic electroluminescent display comprising: a plurality of pixels for displaying an image corresponding to output data current; a plurality of scan lines, each scan line transmitting a scan signal to corresponding ones of said plurality of pixels; a plurality of output data lines to transmit the output data current to the plurality of pixels; a scan driver outputting the scan signals to the plurality of scan lines; a demultiplexer comprising a plurality of demultiplexing circuits and a plurality of pre-charging voltage lines, each of the demultiplexing circuits being coupled to at least two of the output data lines, a pre-charging voltage being supplied to the each of the demultiplexing circuits through one of the pre-charging voltage lines; and a data driver outputting input data current to the demultiplexer, the each of the demultiplexing circuits selecting an output data line among the at least two of the output data lines, the each of the demultiplexing circuits sequentially transmitting the pre-charging voltage and the input data current to the selected output data line while the selected output data line is being selected, one pixel connected to one of the at least two of output data lines and another pixel connected to another of the at least two of output data lines being equivalent in color, the each of the pre-charging voltage lines supplying the pre-charging voltage to the demultiplexing circuits connected to the same color pixel, wherein the demultiplexing circuit operates periodically, and one cycle of the operation comprises first through fourth periods in sequence, and the demultiplexing circuit applies the pre-charging voltage to the first output data line during the first period; applies the input data current to the first output data line during the second period; applies the pre-charging voltage to the second output data line during the third period; and applies the input data current to the second output data line during the fourth period.