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The shift register of display panel employing double-gate oxide thin-film transistors (TFTs) to compensate the severe degradation of the threshold voltage (VTH) is proposed. In double-gate TFTs, VTH is controlled by adjusting top-gate bias, so that VTH degradation can be stabilised by top-gate bias control. However, an optimum top-gate voltage varies from product to product due to process–voltage–temperature...
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