Liquid crystal displaying apparatus and method for manufacturing array substrate used therefor

Abstract

A liquid crystal displaying apparatus high in display quality is provided which is high in aperture ratio and is free from the cross talk. In an liquid crystal displaying apparatus of the present invention, having an array substrate provided with a plurality of scanning wirings and a plurality of signal wirings, active elements, pixel electrodes, and a first alignment film, and an counter substrate provided with a common electrode and a second alignment film, and a liquid crystal layer where the liquid crystal molecule is aligned by the first and second alignment films positioned on a space between the array substrate and the counter substrate, a third alignment film where mutually different distortion is given to the liquid crystal molecule is formed about the intermediate region between the adjacent pixel electrodes.

What is claimed is:  
     
         1 . A liquid crystal displaying apparatus where a third alignment film for giving to the liquid crystal molecule the mutually different distortions about an intermediate region between the adjacent pixels in a liquid crystal displaying apparatus comprising; 
 (a-1) a plurality of scanning wirings and a plurality of signal wirings to be arranged respectively in a row direction and a column direction,    (a-2) an active element to be controlled by the scanning wiring and the signal wiring to be arranged in a matrix shape,    (a-3) and a pixel electrode to be connected with the active element, the pixel electrode being superposed on the scanning wiring and the signal wiring through the transparent insulating film, and    (a-4) an array substrate having a first alignment film formed to cover the pixel electrode,    (b-1) a common electrode to be placed opposite to the pixel electrode,    (b-2) an counter substrate having an alignment film formed on the common electrode,    (c) a liquid crystal layer where the liquid crystal molecule is aligned by the first and second alignment films provided in a space between the array substrate and the counter substrate.    
     
     
         2 . The liquid crystal displaying apparatus of    claim 1   , wherein an intermediate alignment film for giving the distortions to the alignment of the liquid crystal molecule of the liquid crystal layer is provided within the intermediate region, the intermediate alignment film producing a disclination in advance in the intermediate region outside of the pixel electrode.  
     
     
         3 . The liquid crystal displaying apparatus of    claim 2   , wherein the intermediate alignment film serving as a means for preventing a reverse tilt region to be caused by the lateral electric field from entering into the pixel electrode.  
     
     
         4 . The liquid crystal displaying apparatus of    claim 3   , wherein in the adjacent pixel electrodes, the lateral electric field from the adjacent pixel electrode is lowered by making the longitudinal electric field stronger in the pixel electrode end on the side where the disclination is caused.  
     
     
         5 . A liquid crystal displaying apparatus where first and second alignment films for giving to the liquid crystal molecule the mutually different distortions about between the adjacent pixels in a liquid crystal displaying apparatus, comprising; 
 (a-1) a plurality of scanning wirings and a plurality of signal wirings to be arranged respectively in a row direction and a column direction,    (a-2) an active element to be controlled by the scanning wiring and the signal wiring to be arranged in a matrix shape,    (a-3) and a pixel electrode to be connected with the active element, the pixel electrode being superposed on the scanning wiring and the signal wiring through the transparent insulating film, and    (a-4) an array substrate having a first alignment film formed to cover the pixel electrode,    (b-1) a common electrode to be placed opposite to the pixel electrode, and    (b-2) an counter substrate having a second alignment film formed on the common electrode,    (c) a liquid crystal layer where the liquid crystal molecule is aligned by the first and second alignment films provided in a space between the array substrate and the counter substrate.    
     
     
         6 . The liquid crystal displaying apparatus    claim 5   , wherein the first and second alignment serving as a means for producing a disclination line in advance in the intermediate region outside of the pixel electrode.  
     
     
         7 . The liquid crystal displaying apparatus of    claim 6   , wherein the first and second alignment film serving as a means for preventing a reverse tilt region to be caused by the lateral electric field from entering into the pixel electrode.  
     
     
         8 . A method for manufacturing an array substrate comprising steps of: 
 (i) forming the scanning wiring and the storage capacitance on the transparent insulating substrate,    (ii) forming a gate insulating film by covering the scanning wiring and the storage capacitance wiring and the transparent insulating substrate,    (iii) forming in this sequence a semiconductor layer which becomes a channel and a semiconductor layer for ohmic contact on the scanning wiring,    (d) forming the signal wiring and the drain electrode and removing the unnecessary portion of the semiconductor layer for the ohmic contact to have a TFT,    (e) forming in this sequence the protective film and the transparent insulating film by covering the TFT, the signal wiring and the drain electrode,    (f) forming a contact hole in the protective film and the transparent insulating film,    (g) forming photo resist after the pixel electrode film is filmed on the transparent insulating film,    (h) etching the transparent insulating film with the pixel electrode as a mask to form the concave portion on the periphery of the pixel electrode,    (i) a step of forming the alignment film by covering the pixel electrode, the signal wiring and the contact hole, and    (j) rubbing the alignment film to have an intermediate alignment film where the strength of the alignment by the rubbing to the concave is different from that of the other region.