Color filter substrate and lcd utilizing the same

Abstract

A color filter substrate and an LCD applying the same are provided. This color filter substrate has a plurality of color filters with overlap regions acting as black matrix. Subsequently, patterned regions are defined in part of the overlap regions. After formation of a planarization layer and a conductive layer, spacers are formed overlying the patterned regions. The spacers may not shield the transparent region of the color filters, thereby enhancing the aperture ratio of the color filter substrate. Additionally, the thickness of planarization layer in the patterned regions is not influenced by the overlap of the color filters, such that the spacers thereon have a uniform height.

1 . A color filter substrate, comprising
 a substrate;   a plurality of color filters formed on the substrate, wherein at least two adjacent ones of the color filters overlap to form a plurality of overlap regions and an opening in one of the overlap regions;   a planarization layer covering the color filters and filling the opening; and   a transparent conductive layer formed on the planarization layer.   
   
   
       2 . The color filter substrate as claimed in  claim 1 , wherein the color filters have colors comprising red, green, blue, cyan, yellow, or magenta. 
   
   
       3 . The color filter substrate as claimed in  claim 1 , wherein the overlap regions have the same area. 
   
   
       4 . The color filter substrate as claimed in  claim 1 , wherein the opening exposes part of the color filters. 
   
   
       5 . The color filter substrate as claimed in  claim 1 , wherein the opening exposes part of the substrate. 
   
   
       6 . The color filter substrate as claimed in  claim 1 , wherein the opening is circular, square, rectangular, rhomboid, hexagonal, or elliptical. 
   
   
       7 . The color filter substrate as claimed in  claim 1 , wherein one of the overlap regions and the opening have substantially the same width. 
   
   
       8 . The color filter substrate as claimed in  claim 1 , wherein the planarization layer comprises transparent material, organic material, or combinations thereof. 
   
   
       9 . The color filter substrate as claimed in  claim 1 , wherein the overlap regions have different areas. 
   
   
       10 . A liquid crystal display, comprising:
 a color filter substrate as claimed in  claim 1 ;   an opposite substrate disposed opposite to the color filter substrate;   a spacer disposed between the color filter substrate and the opposite substrate; and   a liquid crystal layer disposed between the color filter substrate and the opposite substrate.   
   
   
       11 . The liquid crystal display as claimed in  claim 10 , wherein the spacer is formed on the transparent conductive layer and corresponds to the opening. 
   
   
       12 . The liquid crystal display as claimed in  claim 10 , wherein the opposite substrate comprises data lines having a wider width than that of the overlap regions. 
   
   
       13 . A color filter substrate, comprising:
 a substrate;   a first color filter formed on the substrate;   a second color filter formed on the substrate, wherein a patterned region is formed between the first and second color filters;   a planarization layer covering the first and second color filters; and   a conductive layer on the planarization layer.   
   
   
       14 . The color filter substrate as claimed in  claim 13 , wherein at least part of the first and second filters overlap to form an overlap region, and the patterned region is formed substantially in the overlap region. 
   
   
       15 . The color filter substrate as claimed in  claim 14 , wherein the planarization layer in the overlap region has a thickness of about 0.5 μm to about 4 μm. 
   
   
       16 . The color filter substrate as claimed in  claim 13 , wherein the planarization layer in the patterned region is thicker than the planarization layer on the first and second color filters out of the patterned region. 
   
   
       17 . The color filter substrate as claimed in  claim 13 , wherein the first and second filters in the patterned region do not contact. 
   
   
       18 . The color filter substrate as claimed in  claim 17 , wherein the planarization layer in the patterned region has a thickness of about 0.5 μm to about 4 μm. 
   
   
       19 . The color filter substrate as claimed in  claim 17 , wherein the planarization layer in the patterned region is thicker than the planarization layer on the first and second color filters out of the patterned region. 
   
   
       20 . The color filter substrate as claimed in  claim 13 , wherein the planarization layer is comprised of organic material, transparent layer, or combinations thereof.