Liquid crystal display with pre-writing and method for driving the same

#1. Field of the Invention

#The present invention relates to a liquid crystal display and a method of driving the same and, more particularly, to an active matrix liquid crystal display utilizing thin film transistors (TFTs) as switching elements (hereinafter referred to as “TFT-LCD”) and amethod of driving the same.

#2. Description of the Related Art

#FIG. 1 is an illustration of a schematic configuration of a liquid crystal display according to a first embodiment of the invention.

#FIG. 2 is an illustration of a schematic configuration of a liquid crystal display in which a display driving method according to the first embodiment of the invention is used.

#FIG. 3 illustrates a data enable signal Enab input from a system.

#A description will now be made with reference to FIGS. 1 through 7 on a liquid crystal display and a method of driving the same according to a first embodiment of the invention. First, a brief description will be made with reference to FIG. 1 on a structure of a liquid crystal display utilizing thin film transistors (TFTs) as switching elements as an active matrix liquid crystal display according to the present embodiment. FIG. 1 shows the liquid crystal display as viewed from above a panel thereof. A liquid crystal is enclosed between two glass substrates, i.e., an array substrate 1 and an opposite substrate 14. For example, a plurality of gate bus lines 2 extending in the lateral direction of the figure are formed on the array substrate 1 in a vertically parallel relationship with each other. A plurality of data bus lines 4 extending in the longitudinal direction of the figure are formed in a laterally parallel relationship with each other with an insulation film (not shown) interposed. Each of a plurality of regions in the form of a matrix defined by the gate bus lines 2 and data bus lines 4 formed in the longitudinal and lateral directions serves as a pixel region. FIG. 1 shows an equivalent circuit of the liquid crystal display for each of the pixel regions. A pixel electrode 8 is formed in each of the pixel regions.

#A TFT 6 is formed in the vicinity of the intersection between the gate bus line 2 and data bus line 4 at each of the pixel regions, and the gate electrode and drain electrode of the TFT 6 are connected to the gate bus line 2 and data bus line 4, respectively. The source electrode is connected to the pixel electrode 8. The gate bus lines 2 are driven by a gate driver 18, and the data bus lines 4 are driven by a data driver 16. A grayscale voltage is output from the data driver 16 to each data bus line 4. When a gate signal is output to any gate bus line 2, a series of TFTs 6 connected to the gate bus line 2 are turned on. The grayscale voltage is applied to the pixel electrodes 8 connected to the source electrodes of those TFTs 6 to drive a liquid crystal 10 between the pixel electrodes 8 and a common electrode 12 formed on the opposite substrate 14.

#A schematic configuration of a display driving system of a liquid crystal display according to the present embodiment will now be described with reference to FIG. 2. FIG. 2 shows the liquid crystal display as viewed from above a panel thereof, the configuration of pixels on an array substrate 1 and etc. of the display will not be described because they are the same as those shown in FIG. 1.