Patent ID: 8614660

Claim:
A method of driving an organic electroluminescent display device, comprising: sequentially outputting from a prior shift register first and second prior gate signals to first and second pixels on first and second row lines, respectively, wherein: the output of the first prior gate signals is triggered by a start of a first on-state of a first clock signal, and the output of the second prior gate signals is triggered by a start of a second on-state of a second clock signal, the second on-state is synchronized to start upon the completion of the first on-state, wherein the first on-state and the second on-state take place within a same period of a same clock cycle; outputting from a post shift register a first post gate signal to the first pixel using the first and second prior gate signals, wherein the first post gate signal has an on-state when an on-state of the first prior gate signal is completed and the second prior gate signal has an on-state; and switching a switching device according to the first prior gate signal; and switching a driving device according to the first post gate signal, wherein the number of lines for prior gate signals is more than the number of lines for post gate signals; wherein the first prior gate signal and the first post gate signal are applied to the same first row line, and on and off states of the first prior gate signal and the first post gate signal alternate.