67.2: A Novel Driving Method to Compensate for RC Delay of Ultra‐Large Size and High Resolution Liquid Crystal Displays

Abstract

We propose a novel method to drive ultra-large size and high resolution LCD TV with a single-bank data driver scheme without severe image degradation. We could achieve a maximum luminance and uniformity to be 98cd/m 2 and 86%, respectively when gray 128 is displayed. This confirms excellent performance because the conventional dual-bank driver scheme achieves the counterparts to be 90cd/m 2 and 93%.

Line‐time optimization technology for ultra‐large and high‐resolution liquid crystal displays

“…Figure shows the simulation results when the RC loads increased by 10% and the TFT performance was degraded by 20% simultaneously. Figure (b) shows that the proposed method is effective for the single‐bank driver scheme, because a uniformity of 89.8% and average luminance of 125 cd/m 2 were comparable to those for the dual‐bank driver case.There are many studies on the reliability of a‐Si TFT . The degradation of TFTs is caused by the bias stress at the gate of the TFT.…”

“…Figure 10(b) shows that the proposed method is effective for the single-bank driver scheme, because a uniformity of 89.8% and average luminance of 125 cd/m 2 were comparable to those for the dual-bank driver case.There are many studies on the reliability of a-Si TFT. [14][15][16] The degradation of TFTs is caused by the bias stress at the gate of the TFT. Thin-film transistors in the pixel are used as switching devices and an AC bias is applied to the gate with very low duty cycle.…”

“…The H‐LDC method improves the horizontal uniformity of luminance. Thus, a novel method is required for improving the vertical uniformity over the screen . We propose line‐time optimization (LTO) as a novel driving method for UHD LCDs to enable a single‐bank data driver scheme with better image quality.…”