Liquid crystal display and driving device thereof

Abstract

A liquid crystal display with multi cell gaps includes first and second panels facing each other, and a pixel electrode, a common electrode and a storage electrode formed at one of the first and the second panels. A liquid crystal capacity is formed between the pixel electrode and the common electrode where a liquid crystal material is interposed, and a storage capacity being formed between the pixel electrode and the storage electrode where an insulating layer is interposed. The storage capacity is differentiated depending upon the cell gaps. The gray voltages applied to the pixel electrode have positive and negative gray voltages. The reference value of the positive and the negative gray voltages is varied depending upon the grays. With this structure, flicker correction is uniformly made even in a liquid crystal display where the kick-back voltage is varied per the respective grays.

1 - 3 . (canceled)  
   
   
       4 . A liquid crystal display (LCD), comprising: 
 a liquid crystal panel assembly having: 
 a plurality of gate lines:  
 a plurality of data lines crossing the gate lines;  
 a plurality of pixels defined by the crossing of the gate lines and the data lines; and  
 a plurality of switching elements provided corresponding to the pixels, each switching element connected to the corresponding gate line and the corresponding data line;  
   a gray voltage generation unit generating a plurality of gray voltages;    a scan driving unit supplying gate voltages to the gate lines; and    a data driving unit receiving the gray voltages from the gray voltage generation unit and supplying relevant gray voltages to the data lines; and    wherein the gray voltages comprise positive gray voltages and negative gray voltages, and reference values of the positive gray voltages and the negative gray voltages are varied depending upon gray levels.    
   
   
       5 . The LCD of  claim 4 , wherein the gray voltage generation unit comprises: 
 a first resistance row having a plurality of resistances serially connected to each other between a first voltage to be applied and a reference voltage to generate a plurality of positive gray voltages;    a second resistance row having a plurality of resistances serially connected to each other between the reference voltage and a second voltage to be applied to generate a plurality of negative gray voltages; and    a voltage control unit partitioning the first voltage and the second voltage to generate a reference voltage, and supplying the reference voltage to the first resistance row and the second resistance row;    wherein the reference voltage is varied depending upon the gray levels.    
   
   
       6 . The LCD of  claim 5 , wherein the reference voltage has a value of ((the first voltage+the second voltage)/2)+α.  
   
   
       7 . The LCD of  claim 5 , wherein the voltage control unit comprises two or more resistances having different values and serially connected to each other between the first and the second voltages.