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Investigation on Improving Color Crosstalk for High-Transmittance TFT-LCDs

The effect of inter-electrode coupling on color crosstalk (CCT) of TFT-LCD with high transmittance pixel design is investigated systematically. Theoretical analysis shown that the increased asymmetric capacitive coupling effect between data and pixel electrode signals is the main reason for CCT of the high transmittance panels. If applying some traditional strategies to improve CCT under the line-inversion driving scheme, the effectiveness is very limited and there is a loss of transmittance. When using the proposed sup-flip driving scheme, good image quality with weak CCT can be obtained in the color images. This is mainly ascribed to the dot inversion driving mode of pixel signals, which greatly weakens the coupling effect caused by the change of data signals and balances the brightness difference between adjacent pixels. These results demonstrate that applying the proposed super flip driving scheme is an effective way to modulate the CCT defect and enhance the display performance for TFT-LCDs with high transmittance design.