Liquid crystal display device

Abstract

A liquid crystal display device comprising a pair of substrates with liquid crystal layer therebetween, a plurality of gate signal lines and a plurality of drain signal lines formed on one of the pair of substrates, at least a pixel electrode and a plurality of counter electrodes formed on the one of the pair of substrates in each pixels, at least one of the plurality of counter electrodes extend along a drain signal line overlapping to the drain signal lines with at least one of an insulation film therebetween, and the drain signal line has two or more regions which differ in distance between a surface of the drain signal line and the counter electrode.

What is claimed is:  
     
         1 . A liquid crystal display device comprising: 
 a pair of substrates with liquid crystal layer therebetween;    a plurality of gate signal lines and a plurality of drain signal lines formed on one of the pair of substrates;    at least a pixel electrode and a plurality of counter electrodes formed on the one of the pair of substrates in each pixels;    wherein at least one of the plurality of counter electrodes extend along a drain signal line overlapping to the drain signal lines with at least one of an insulation film therebetween, and the drain signal line has two or more regions which differ in distance between a surface of the drain signal line and the counter electrode.    
     
     
         2 . A liquid crystal display device comprising: 
 a pair of substrates with liquid crystal layer therebetween;    a plurality of gate signal lines and a plurality of drain signal lines formed on one of the pair of substrates;    at least a pixel electrode and a plurality of counter electrodes formed on the one of the pair of substrates in each pixels;    wherein at least one of the plurality of counter electrodes extend along a drain signal line overlapping to the drain signal lines with at least one of an insulation film therebetween, the drain signal line has at least a taper portion in a cross section view at width direction of the drain signal line.    
     
     
         3 . A liquid crystal display device according to  claim 2 , wherein a width of the drain signal line is wider at a substrate side of the drain signal line formed thereon than a liquid crystal layer side.  
     
     
         4 . A liquid crystal display device according to  claim 2 , wherein the drain signal line have a multiplayer structure of a lower layer faced to the substrate and an upper layer, and the width of the lower layer is wider than a width of the upper layer.  
     
     
         5 . A liquid crystal display device comprising: 
 a pair of substrates with liquid crystal layer therebetween;    a plurality of gate signal lines and a plurality of drain signal lines formed on one of the pair of substrates;    at least a pixel electrode and a plurality of counter electrodes formed on the one of the pair of substrates in each pixels;    wherein the drain signal line has a three-layered structure in which an intermediate layer is formed of a conductive layer made of Al or an alloy thereof and an uppermost layer and a lowermost layer are formed of conductive layers made of material other than Al or an alloy thereof,    at least one of the plurality of counter electrodes extend along a drain signal line overlapping to the drain signal lines with at least one of an insulation film therebetween,    and width of the lowermost layer is wider than a width of the uppermost layer, and a width of the intermediate layer gradually change its from the width of the lowermost layer to the width of the uppermost layer.    
     
     
         6 . A liquid crystal display device according to  claim 5 , further comprising oxide films formed on the side wall of the surface of the intermediate layer.  
     
     
         7 . A liquid crystal display device comprising: 
 a pair of substrates with liquid crystal layer therebetween;    a plurality of gate signal lines and a plurality of drain signal lines formed on one of the pair of substrates;    at least a pixel electrode and a plurality of counter electrodes formed on the one of the pair of substrates in each pixels;    wherein at least one of the plurality of counter electrodes extend along a gate signal line overlapping to the gate signal lines with at least one of an insulation film therebetween, the gate signal line has at least a taper portion in a cross section view at width direction of the gate signal line.    
     
     
         8 . A liquid crystal display device according to  claim 7 , wherein a width of the gate signal line is wider at a substrate side of the gate signal line formed thereon than a liquid crystal layer side.  
     
     
         9 . A liquid crystal display device according to  claim 8 , wherein the gate signal line have a multiplayer structure of a lower layer faced to the substrate and an upper layer, and the width of the lower layer is wider than a width of the upper layer.  
     
     
         10 . A liquid crystal display device comprising: 
 a pair of substrates with liquid crystal layer therebetween;    a plurality of gate signal lines and a plurality of drain signal lines formed on one of the pair of substrates;    at least a pixel electrode and a plurality of counter electrodes formed on the one of the pair of substrates in each pixels;    wherein the gate signal line has a three-layered structure in which an intermediate layer is formed of a conductive layer made of Al or an alloy thereof and an uppermost layer and a lowermost layer are formed of conductive layers made of material other than Al or an alloy thereof,    at least one of the plurality of counter electrodes extend along a gate signal line overlapping to the gate signal lines with at least one of an insulation film therebetween,    and width of the lowermost layer is wider than a width of the uppermost layer, and a width of the intermediate layer gradually change its from the width of the lowermost layer to the width of the uppermost layer.    
     
     
         11 . A liquid crystal display device according to  claim 10 , further comprising oxide films formed on the side wall of the surface of the intermediate layer.