Liquid crystal display device having rectangular-shaped pixel electrodes overlapping with comb-shaped counter electrodes in plan view

Abstract

The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor.

What is claimed is: 
     
         1 . A liquid crystal display device comprising:
 a first substrate and a second substrate;   a liquid crystal layer disposed between the first substrate and the second substrate;   a plurality of gate lines and a plurality of drain lines formed on the first substrate; and   a plurality of pixel regions surrounded by the plurality of gate lines and the plurality of drain lines,   wherein each of the plurality of pixel regions comprises a thin film transistor which is connected to one of the plurality of gate lines and one of the plurality of drain lines and comprises a semiconductor layer, a pixel electrode which is connected to the thin film transistor, a counter electrode which comprises slits, and an insulation layer which is disposed between the pixel electrode and the counter electrode,   wherein the liquid crystal layer is driven by an electric field which is generated by the pixel electrode and the counter electrode, and   wherein the counter electrode comprises a cutout portion between the semiconductor layer and the liquid crystal layer.   
     
     
         2 . A liquid crystal display device according to  claim 1 , wherein the semiconductor layer is an a-Si semiconductor film. 
     
     
         3 .    
     
     
         4 . A liquid crystal display device according to  claim 3 , wherein an organic resin film is formed between the pixel electrode and the first substrate. 
     
     
         5 . A liquid crystal display device according to  claim 1 , wherein a part of the pixel electrode overlaps with a part of the semiconductor layer. 
     
     
         6 . A liquid crystal display device according to  claim 5 , wherein the semiconductor layer is an a-Si semiconductor film. 
     
     
         7 . A liquid crystal display device according to  claim 6 , wherein an organic resin film is formed between the pixel electrode and the semiconductor layer. 
     
     
         8 . A liquid crystal display device according to  claim 5 , wherein the semiconductor layer is a p-Si semiconductor film 
     
     
         9 . A liquid crystal display device according to  claim 8 , wherein an organic resin film is formed between the pixel electrode and the semiconductor layer.