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Category:Duchesses of Savoy
Category:15th-century Italian women
Category:15th-century Italian people
Category:1470 deaths1. Field of the Invention
The present invention relates to a liquid crystal display apparatus, and more particularly to a liquid crystal display apparatus in which gray scale display can be performed with only one gray scale value and a method for driving the same.
2. Description of the Related Art
As a flat panel display apparatus, a liquid crystal display apparatus is being actively researched and developed. In a liquid crystal display apparatus, a voltage is applied to liquid crystal molecules arranged in a predetermined direction so as to change the alignment direction of the liquid crystal molecules, thereby changing the amount of light transmitted therethrough. In other words, it is possible to adjust a quantity of light which is transmitted through a liquid crystal layer by controlling the voltage applied to the liquid crystal layer.
A liquid crystal display apparatus is generally divided into two types depending upon how the liquid crystal molecules are driven. A first type of liquid crystal display apparatus is a twisted nematic (TN) liquid crystal display apparatus, which drives a liquid crystal layer using a simple matrix structure. A second type of liquid crystal display apparatus is a multiplexed liquid crystal display apparatus, which employs an active matrix structure and which sequentially and actively drives each pixel.
The liquid crystal display apparatus includes a plurality of data lines, a plurality of gate lines and a plurality of pixel electrodes which are formed in a matrix configuration.
Specifically, one of the gate lines and one of the data lines cross each other, and each pixel electrode is formed at the point of intersection. Pixel electrodes of respective colors are selectively driven by turning on only one of the gate lines. In other words, a voltage is applied to the pixel electrode by turning on only one of the gate lines. In a case where the voltage applied to the pixel electrode is changed in response to a video signal, a plurality of gray scales can be represented by applying a plurality of different voltages to the pixel electrode.
The gate lines are driven by a gate driver, and the data lines are driven by a data driver. The gate driver sequentially applies a scanning pulse to the gate lines. The data driver applies data signals to the data lines when the scanning pulse is applied. The data driver applies the data signals to the data lines and the data signals are sequentially applied to the data lines. The data driver applies gray scale voltages corresponding to the data signals to the data lines in response to the scanning pulse.
In order to obtain a high quality image, it is necessary to accurately and sequentially apply the gray scale voltages to the data lines in response to the scanning pulse.