Color filter substrate and liquid crystal display apparatus having the same

Abstract

A reflection-transmission LCD includes substrates arranged opposite to each other, a color filter layer formed on at least one of the substrates, a hole formed in that color filter layer to substantially minimize differences in color reproducibility between reflective mode operation and transmission mode operation, a planarization layer formed on a first of the substrates and including a first insulating layer formed on the color filter layer that covers the at least one hole and a second insulating layer formed on the first insulating layer for substantially planarizing step differences due to the hole formed in the at least one color filter layer a common electrode formed on the second insulating layer, liquid crystal material arranged between the first substrate and the second substrate, a gate insulating layer formed on the second substrate, and a third insulating layer formed on the gate insulating layer.

1 . A reflection-transmission LCD, comprising: 
 a first substrate and a second substrate arranged opposite the first substrate;    a red (R), green (G) and blue (B) color filter layer formed on the first substrate;    a planarization layer formed on the first substrate;    a hole formed in the color filter layer to substantially minimize differences in color reproducibility between reflective mode operation and transmission mode operation;    a common electrode formed on the second insulating layer;    liquid crystal material arranged between the first substrate and the second substrate;    a gate insulating layer formed on the second substrate; and    a third insulating layer formed on the gate insulating layer,    wherein the planarization layer comprises a first insulating layer formed on the color filter layer that covers the at least one hole, and a second insulating layer formed on the first insulating layer for substantially planarizing step differences due to the hole formed in the color filter layer.    
   
   
       2 . The reflection-transmission LCD of  claim 1  wherein the third insulating layer is patterned into reflection portions and transmission portions.  
   
   
       3 . The reflection-transmission LCD of  claim 2 , further comprising: 
 a transmission electrode formed on the transmission portions; and    a reflection electrode formed on the reflection portions,    wherein the non-patterned portions comprise a substantially concavo-convex shape.    
   
   
       4 . The reflection-transmission LCD of  claim 1 , further comprising: 
 a first hole formed in the red (R) color filter;    a second hole formed in the green (G) color filter; and    a third hole formed in the blue (B) color filter.    
   
   
       5 . The reflection-transmission LCD of  claim 4  wherein the second hole is larger than the first hole.  
   
   
       6 . The reflection-transmission LCD of  claim 4  wherein the third hole is smaller than the second hole.  
   
   
       7 . The reflection-transmission LCD of  claim 4  wherein the each of the red (R), green (G) and blue (B) color filters is divided into a first area and a second area arranged adjacent to each other where the first area does not include the hole.  
   
   
       8 . The reflection-transmission LCD of  claim 7  wherein the second area of at least one of the red (R), green (G) or blue (B) color filters includes two holes.  
   
   
       9 . The reflection-transmission LCD of  claim 7  wherein the first area is a transmission area and the second area is a reflection area.  
   
   
       10 . A reflection-transmission LCD, comprising; 
 a plurality of substrates arranged opposite to each other;    a color filter layer formed on at least one of the plurality of substrates;    a hole formed in the at least one color filter layer to substantially minimize differences in color reproducibility between reflective mode operation and transmission mode operation;    a planarization layer formed on a first of the plurality of substrates and comprising a first insulating layer formed on the color filter layer that covers the at least one hole and a second insulating layer formed on the first insulating layer for substantially planarizing step differences due to the hole formed in the at least one color filter layer;    a common electrode formed on the second insulating layer;    liquid crystal material arranged between the first substrate and the second substrate;    a gate insulating layer formed on the second substrate; and    a third insulating layer formed on the gate insulating layer.    
   
   
       11 . The reflection-transmission LCD  claim 10  wherein the third insulating layer is patterned into reflection portions and transmission portions.  
   
   
       12 . The reflection-transmission LCD of  claim 11 , further comprising: 
 a transmission electrode formed on the transmission portions; and    a reflection electrode formed on the reflection portions,    wherein the non-patterned portions comprise a substantially concavo-convex shape.    
   
   
       13 . The reflection-transmission LOU of  claim 10 , further comprising: 
 a red (R), a green (C), and a blue (B) color filter formed in the color filter layer;    a first hole formed in the red (R) color filter;    a second hole formed in the green (G) color filter; and    a third hole formed in the blue (B) color filter.    
   
   
       14 . The reflection-transmission LCD of  claim 13  wherein the second hole is larger than at least one of the first hole or the third hole.  
   
   
       15 . The reflection-transmission LCD of  claim 13  wherein the each of the red (R), green (G) and blue (B) color fitters is divided into a first area and a second area arranged adjacent to each other wherein each of the first areas does not have a hole and at least one of the second areas has two holes.  
   
   
       16 . The reflection-transmission LED of  claim 15  wherein the first area is a transmission area and the second area is a reflection area.  
   
   
       17 . The reflection-transmission LCD of  claim 10  wherein the planarization layer is formed over the color filter layer and extends into at least one hole formed in the color filter layer.  
   
   
       18 . The reflection-transmission LCD of  claim 17  wherein the planarization layer is disposed for leveling a thinner portion of color filter layer in a reflection area with a thicker portion of color filter layer in a transmission area.  
   
   
       19 . The reflection-transmission LCD of  claim 13  wherein two holes are formed in a red (R) portion of the color filter layer, two holes are formed in a green (G) portion of the color filter layer, and one hole is formed in a blue (B) portion of the color fitter layer.  
   
   
       20 . The reflection-transmission LCD of  claim 13  wherein two holes are formed in a red (R) portion of the color fitter layer, two holes are formed in a green (G) portion of the color filter layer, and one hole is formed in a blue (B) portion of the color filter layer.