Liquid crystal display

Abstract

A liquid crystal display includes a first insulating substrate, thin transistors formed on the first insulating substrate, and pixel electrodes connected to the thin film transistors each with an opening pattern. A second insulating substrate faces the first insulating substrate. A black matrix and color filters are formed on the second insulating substrate, and a common electrode covers the black matrix and the color filters. A protrusion pattern is formed on the common electrode. The protrusion pattern is pillar-shaped with top and bottom sides. The top and bottom sides of the protrusion pattern are shaped with a circle, a rectangle, or a rectangle with curved edges. The protrusion pattern includes a protrusion having a relatively small thickness, and a protrusion having a relatively large thickness. The former protrusion is used for domain partitioning, and the latter protrusion is used as a spacer. A vertical alignment layer is internally formed on the substrates, and a liquid crystal is injected in-between the substrates. Polarizing plates are externally attached to the substrates, respectively. A bi-axial film and a λ/4 plate are interposed between the respective substrates and the respective polarizing plates. The bi-axial film and the λ/4 plate transform the linear-polarizing into a circular-polarizing.

1 . A method for manufacturing a liquid crystal display (LCD), comprising steps of: 
 forming a black matrix layer on a substrate;    forming a color filter layer on the substrate;    forming a conductive layer on the color filter layer;    forming an organic insulating layer on the conductive layer, the organic insulating layer being photosensitive;    exposing the organic insulating film to a light beam through a mask having an opaque area, a semitransparent area and a transparent area on predetermined areas thereof; and    developing the organic insulating layer to form a protrusion and a spacer taller than the protrusion,    wherein the protrusion overlaps the black matrix layer.    
   
   
       2 . The method of  claim 1 , wherein the spacer is formed at a portion of the organic insulating layer corresponding to the opaque area and the protrusion is formed at a portion of the organic insulating layer corresponding to the semitransparent area.  
   
   
       3 . The method of  claim 1 , wherein the spacer is formed at a portion of the organic insulating layer corresponding to the transparent area and the protrusion is formed at a portion of the organic insulating layer corresponding to the semitransparent area.  
   
   
       4 . The method of  claim 1 , wherein the black matrix is formed between the substrate and the color filter layer.  
   
   
       5 . A method for manufacturing a liquid crystal display (LCD), comprising steps of: 
 forming a color filter layer on a substrate;    forming a conductive layer on the color filter layer;    forming an organic insulating layer on the conductive layer, the organic insulating layer being photosensitive;    exposing the organic insulating film to a light beam through a mask having an opaque area, a semitransparent area and a transparent area on predetermined areas thereof; and    developing the organic insulating layer to form a protrusion having a width of 3 μm to 15 μm and a spacer taller than the protrusion and having a width of 5 μm to 40 μm.    
   
   
       6 . A method for manufacturing a liquid crystal display (LCD), comprising steps of: 
 forming a black matrix layer on a substrate divided into a plurality of pixel regions, the black matrix comprising a first portion formed around the pixel region and a second portion formed within the pixel region;    forming a color filter layer on the substrate;    forming a conductive layer on the color filter layer;    forming an organic insulating layer on the conductive layer, the organic insulating layer being photosensitive,    exposing the organic insulating film to a light beam through a mask having an opaque area, a semitransparent area and a transparent area on predetermined areas thereof; and    developing the organic insulating layer to form a protrusion and a spacer taller than the protrusion, wherein the spacer overlaps the first portion of the black matrix and the protrusion overlaps the second portion of the black matrix layer.