1. Field of the Invention
The present invention relates to the flat panel TV (especially the LCD TV) display system, and more specifically to a video system for improving the response time and reducing the motion-blur of the panel display.
2. Description of Prior Art
The development of flat panel displays has been accelerated. In the current display market, flat panel displays are gradually replacing the traditional CRT displays. However, some of the flat panel displays, for example, TFT-LCD panel displays, are generally slower in the response time compared to the CRT displays. This disadvantage hampers the development of the LCD TV, for which the display quality (especially motion blur) is highly concerned.
To improve the quality of motion picture on the flat panel (especially TFT-LCDs), various driving techniques have been introduced. Among them, the over driving method is well known as the effective scheme for improving the response time. The over driving method makes the response time fast by applying an over driving voltage to a motion pixel. In order to apply the over driving method to the flat panel, the motion pixels are detected by comparing the pixel values of current and previous frames, and determining the value to be added to the original value. The over driving level is decided through a decision model. Such a model heavily depends on the characteristics of the flat panel. For TFT-LCDs, the decision model is normally implemented by a look-up table built in a over drive circuit chip. The over drive decision requires one-frame delay mechanism for getting the pixel value of the previous frame. A compression and decompression mechanism is used for reducing the bandwidth demands of the frame buffer access for implementing the one-frame delay. The over driving method is proposed in some prior arts to combine with the timing controller (TCON) in the flat panel display for improving the video quality of motion picture.
To further improve the response time of a flat panel display, the present invention proposes an extra video processing for de-motion-blurring. A video system in accordance with the present invention combines the color TV decoding, deinterlacing, scaling, and de-motion-blur process and many other video enhancement features to optimize the overall system in cost.