Image display device and driving method thereof

Abstract

An image display device including a plurality of data lines for transmitting data currents which correspond to images and a plurality of scan lines for transmitting select signals. A plurality of pixel circuits coupled to the data lines and the scan lines are used to display the images which correspond to the data currents in response to the select signals. A precharge driver applies a precharge voltage to at least one of the data lines. The precharge driver varies the precharge voltage in correspondence to at least one of the data currents.

1 . A driving method of an image display device including a plurality of data lines for transmitting data currents corresponding to images, a plurality of scan lines for transmitting select signals, and a plurality of pixel circuits coupled to the data lines and the scan lines, comprising: 
 applying a precharge voltage to one of the data lines during a first period; and    transmitting one of the data currents provided by one of the data lines to a corresponding one the pixel circuits in response to one the select signals provided by a corresponding one of the scan lines during a second period, wherein the precharge voltage has different levels with respect to at least two of the data lines for applying different said data currents.    
   
   
       2 . The driving method of  claim 1 , wherein each said pixel circuit comprises: 
 a display element for displaying the images corresponding to an amount of a current which is applied thereto;    a driving transistor including a first electrode, a second electrode, and a third electrode, the driving transistor controlling a current which flows to the third electrode from the second electrode according to a voltage difference between the first electrode and the second electrode;    a first switch for transmitting a corresponding one of the data currents applied to a corresponding one of the data lines to the first electrode of the driving transistor in response to a corresponding one of the select signals;    a second switch for diode-connecting the driving transistor in response to the corresponding one of the select signals; and    a capacitor, coupled between the first electrode and the second electrode of the driving transistor, for storing a voltage corresponding to the corresponding one of the data currents.    
   
   
       3 . The driving method of  claim 2 , wherein the driving transistor is a P-type transistor, and the precharge voltage applied to the corresponding one of the data lines is inversely proportional to a corresponding one of the data currents.  
   
   
       4 . The driving method of  claim 2 , wherein the driving transistor is an-N-type transistor, and the precharge voltage applied to the corresponding one of the data lines is proportional to a corresponding one of the data currents.