Patent ID: 8199073
Filing Date: 2012-06-12
Classification: G09G

Abstract:
1. An electro-luminescence (EL) display device, comprising: an EL display panel having a plurality of pixel cells; m data electrode lines (wherein m is a positive integer) and a plurality of scan electrode lines in the EL display panel, the data electrode lines and the scan electrode lines defining the pixel cells; a data driver having a plurality of output channels for supplying data signals to the m data electrode lines; a multiplexer for connecting each output channel of the data driver to k data electrode lines (wherein k is an integer greater than 2), wherein the multiplexer includes m writing switching devices connected to the respective data electrode lines; m multiplexer switching devices commonly connected to each output channel of the data driver for each k unit; m buffers connected between respective multiplexer switching devices and the respective writing switching devices; and m capacitors connected between a node positioned between the multiplexer switching devices and the buffers and a ground voltage line to temporarily store the data signals supplied via the multiplexer switching devices; a scan driver for sequentially applying a scanning pulse during a gate on-time to the plurality of scan electrode lines, wherein the scanning pulse has an OFF time and an ON time of each of the scan electrode lines during the gate on-time; and a timing controller for generating control signals to control the data driver and the scan driver, and generating k selection signals to sequentially switch the k of the m multiplexer switching devices during the OFF time of the scan electrode line within the gate on-time and a writing signal to simultaneously switch the m writing switching devices in such a manner to be synchronized with the scanning pulse during the ON time of the scan electrode line within the gate on-time, wherein the writing signal is synchronized with the scanning pulse, wherein the m multiplexer switching devices are sequentially switched on during the OFF time of the scan electrode line, and the m writing switching devices are simultaneously switched on when the m multiplexer switching devices are switched off during the ON time of the scan electrode line.