A 15-inch diagonal Super-TFT-LCD (in-plane switching mode), with a brightness of 400 cd/m 2 , has been developed. The moving picture image quality is improved by alternating the light on and off periods, and synchronizing those periods with a gate selection. The brightness is realized without increasing power consumption by increasing the lamp current in the on period, while the off period contributes to lamp cooing.

In this paper, we will discuss a low‐power and high‐integration driver IC for small‐sized TFT‐LCDs, which is applied to mobile phones. By studying a driving scheme to minimize power consumption, an output circuit for 262k colors, and chip arrangement according to the resolution, we have developed a driver IC that achieves an excellent balance between cost and performance.

Present TFT‐LCD has low dynamic contrast when displaying moving pictures, such as TV and DVD. By applying a dynamic contrast compensating driving method to a TN‐mode and IPS‐mode TFT‐LCD, moving picture quality is improved more than with conventional fast response driving method.

Abstract— High‐resolution displays are now needed for mobile equipment, not only for cell phones but for other devices such as ultra‐mobile PCs (UMPCs) and mobile Internet protocol televisions (IPTVs). A new low‐cost and low‐power driving method for high‐resolution in‐plane‐switching (IPS) liquid‐crystal displays (LCDs) on a low‐temperature polycrystalline‐silicon (LTPS) thin‐film‐transistor (TFT) platform has been developed. Because this method drives common electrodes separated by each line, it can reduce inversion frequency, unlike “dot‐inversion” or “column‐inversion” methods. On the other hand, it was found that horizontal smear is an obstacle to achieve this method. To solve this problem, techniques to optimize the timing of RGB time‐sharing are proposed. A 5‐in. WXGA (1366 × 768) prototype using the new driving method was fabricated, and it was found that the horizontal smear is less than ±1% of the luminance and that the power consumption of the display discharge and charge is 0.245 W.

We have developed new driving technique, which improved the quality of moving picture on TFT-LCDs. Dynamic Contrast Compensation (DCC) method has suppressed a drop of the effective brightness. Furthermore, TFT-LCD of impulse type was realized with Super Impulse method that a combination of the black data insertion method and blinking back light systems, and it could improve the quality of the moving picture quality.