Semi-transparent semi-reflective liquid crystal display device color filter

Abstract

The main object of the present invention is to provide a color filter for a transflective type color liquid crystal display which is easily produced and capable of displaying the same color tone with both of a reflecting light and a transmitting light, and shows light scattering in a reflective light region. In order to attain the above mentioned object, the present invention provides a color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, wherein, a convex-concave is formed on a surface of a liquid crystal layer side of the reflective light coloring layer, and an average thickness of the reflective light coloring layer is formed to be thinner than the thickness of the transmissive light coloring layer, and a refractive index difference between the reflective light coloring layer and a layer in contact with the surface of the convex-concave formed side of the reflective light coloring layer, is 0.1 or more. Further, a main object of the present invention is to provide a color filter for transflective type liquid crystal display comprising a transparent membrane pattern region obtained by laminating: a transparent substrate; a transparent membrane pattern layer comprising a transparent membrane formed in a pattern on the transparent substrate; and a coloring layer formed so as to cover the transparent membrane pattern layer.

1 . A color filter for transflective type liquid crystal display comprising a transparent membrane pattern region obtained by laminating: a transparent substrate; a transparent membrane pattern layer comprising a transparent membrane formed in a pattern on the transparent substrate; and a coloring layer formed so as to cover the transparent membrane pattern layer.  
   
   
       2 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein the transparent membrane pattern region is used as a reflective light region, and 
 a coloring layer region, comprising the transparent substrate and the coloring layer formed on the transparent substrate, is used as a transmissive light region.    
   
   
       3 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein the transparent membrane pattern region is used as a transmissive light region, and 
 a transparent membrane uniform region, obtained by laminating: the transparent substrate; a transparent membrane uniform layer comprising the transparent membrane formed uniformly on the transparent substrate; and the coloring layer formed on the transparent membrane uniform layer, is used as a reflective light region.    
   
   
       4 . The color filter for transflective type liquid crystal display according to  claim 3 , wherein an area ratio of a region, where the transparent membrane is formed, in the transparent membrane pattern region (transparent membrane forming area/transparent membrane pattern region area) is in a range of 0.3 to 0.5.  
   
   
       5 . The color filter for transflective type liquid crystal display according to  claim 4 , wherein the thickness of the transparent membrane forming the transparent membrane pattern layer and the transparent membrane uniform layer is in a range of 0.5 to 3.0, when the thickness of the coloring layer, when the coloring layer is used by itself in the transmissive light region, is 1.  
   
   
       6 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein the transparent membrane pattern layer comprises a pattern composed of the island shaped transparent membrane.  
   
   
       7 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein the transparent membrane pattern layer comprises a pattern composed of pore portions formed, in a pattern, in the transparent membrane.  
   
   
       8 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein the island shaped portion or the pore portions in the transparent membrane pattern layer is in the form of cylinder.  
   
   
       9 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein the thickness of the transparent membrane, forming the transparent membrane pattern layer or forming the transparent membrane pattern layer and the transparent membrane uniform layer, is 0.5 to 3.5 μm.  
   
   
       10 . The color filter for transflective type liquid crystal display according to  claim 1 , wherein a transmittance spectral of the transparent membrane at wavelengths from 380 nm to 780 nm is 85% or more.  
   
   
       11 . A transflective type liquid crystal display comprising the color filter for transflective type liquid crystal display according to  claim 1 .  
   
   
       12 . A color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, 
 wherein, a convex-concave is formed on a surface of a liquid crystal layer side of the reflective light coloring layer, and an average thickness of the reflective light coloring layer is formed to be thinner than the thickness of the transmissive light coloring layer, and    a refractive index difference, between the reflective light coloring layer and a layer in contact with the surface of the convex-concave formed side of the reflective light coloring layer, is 0.1 or more.    
   
   
       13 . The color filter for transflective type color liquid crystal display according to  claim 12 , wherein the reflective light coloring layer comprises a refractive index improving agent, which improves the refractive index, so that the refractive index difference, between the reflective light coloring layer and a layer in contact with the surface of the convex-concave formed side of the reflective light coloring layer, is 0.1 or more.  
   
   
       14 . The color filter for transflective type color liquid crystal display according to  claim 12 , wherein the convex-concave on the surface of the reflective light coloring layer is composed of a plurality of concave portions formed by a curved surface on the surface of the reflective light coloring layer formed in the same thickness as the transmissive light coloring layer.  
   
   
       15 . The color filter for transflective type color liquid crystal display according to  claim 12 , wherein a layer in contact with the surface of the convex-concave formed side of the reflective light coloring layer is an optical route difference controlling layer for controlling an optical route difference between a reflective light region and a transmissive light region.  
   
   
       16 . A color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, 
 wherein, a convex-concave is formed on a surface of a liquid crystal layer side of the reflective light coloring layer, and an average thickness of the reflective light coloring layer is formed to be thinner than the thickness of the transmissive light coloring layer,    an optical route difference controlling layer, for controlling an optical route difference between a reflective light region and a transmissive light region, is formed on a surface of the convex-concave formed side of the reflective light coloring layer, and    the optical route difference controlling layer comprises a refractive index improving agent, which improves a refractive index, so that a refractive index difference, between the reflective light coloring layer and the optical route difference controlling layer, is 0.1 or more.    
   
   
       17 . The color filter for transflective type color liquid crystal display according to  claim 16 , wherein the convex-concave on the surface of the reflective light coloring layer is composed of a plurality of concave portions formed by a curved surface on the surface of the reflective light coloring layer formed in the same thickness as the transmissive light coloring layer.  
   
   
       18 . The color filter for transflective type color liquid crystal display according to  claim 16 , wherein the convex-concave is formed on a surface of a liquid crystal layer side of the optical route difference controlling layer, and 
 a refractive index difference, between the optical route difference controlling layer and a layer in contact with the surface of the convex-concave formed side of the optical route difference controlling layer, is 0.1 or more.    
   
   
       19 . The color filter for transflective type color liquid crystal display according to  claim 18 , wherein the convex-concave on the surface of the optical route difference controlling layer is composed of a plurality of concave portions formed by a curved surface on the surface of the optical route difference controlling layer.  
   
   
       20 . A color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, 
 wherein, a convex-concave is formed on a surface of a liquid crystal layer side of the reflective light coloring layer, and an average thickness of the reflective light coloring layer is formed to be thinner than the thickness of the transmissive light coloring layer,    an optical route difference controlling layer, for controlling an optical route difference between a reflective light region and a transmissive light region, is formed on a surface of the convex-concave formed side of the reflective light coloring layer, and the convex-concave is formed also on a surface of a liquid crystal side of the optical route difference controlling layer,    a optical route difference controlling layer flattening layer is formed on the surface of the convex-concave formed side of the optical route difference controlling layer to flatten the surface of the optical route difference controlling layer, and    a refractive index difference, between the optical route difference controlling layer and the optical route difference controlling layer flattening layer, is 0.1 or more.    
   
   
       21 . The color filter for transflective type color liquid crystal display according to  claim 20 , wherein the optical route difference controlling layer flattening layer comprises a refractive index improving agent, which improves a refractive index, so that the refractive index difference, between the optical route difference controlling layer and the optical route difference controlling layer flattening layer, is 0.1 or more.  
   
   
       22 . The color filter for transflective type color liquid crystal display according to  claim 20 , wherein the reflective light coloring layer comprises a refractive index improving agent, which improves a refractive index, so that the refractive index difference, between the optical route difference controlling layer and the reflective light coloring layer, is 0.1 or more.  
   
   
       23 . The color filter for transflective type color liquid crystal display according to  claim 20 , wherein the convex-concave on the surface of the reflective light coloring layer is composed of a plurality of concave portions formed by a curved surface on the surface of the reflective light coloring layer formed in the same thickness as the transmissive light coloring layer.  
   
   
       24 . The color filter for transflective type color liquid crystal display according to  claim 20 , wherein the convex-concave on the surface of the optical route difference controlling layer is composed of a plurality of concave portions formed by a curved surface on the surface of the optical route difference controlling layer.  
   
   
       25 . A color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, 
 wherein at least one removal portion is formed so that an average thickness of the reflective light coloring layer is thinner than the thickness of the transmissive light coloring layer,    an optical route difference controlling layer, for controlling an optical route difference between a reflective light region and a transmissive light region, is formed on a surface of a liquid crystal layer side of the reflective light coloring layer,    a convex-concave is formed on a surface of a liquid crystal layer side of the optical route difference controlling layer, and    a refractive index difference, between the optical route difference controlling layer and a layer in contact with the surface of the convex-concave formed side of the optical route difference controlling layer, is 0.1 or more.    
   
   
       26 . The color filter for transflective type color liquid crystal display according to  claim 25 , wherein the optical route difference controlling layer comprises a refractive index improving agent, which improves a refractive index, so that a refractive index difference, between the optical route difference controlling layer and a layer in contact with the surface of the convex-concave formed side of the optical route difference controlling layer, is 0.1 or more.  
   
   
       27 . A color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, 
 wherein at least one removal portion is formed so that an average thickness of the reflective light coloring layer is thinner than the thickness of the transmissive light coloring layer,    an optical route difference controlling layer, for controlling an optical route difference between a reflective light region and a transmissive light region, is formed on a surface of a liquid crystal layer side of the reflective light coloring layer,    a convex-concave is formed on a surface of a liquid crystal layer side of the optical route difference controlling layer,    a optical route difference controlling layer flattening layer is formed on the surface of the convex-concave formed side of the optical route difference controlling layer to flatten the surface of the optical route difference controlling layer, and    a refractive index difference, between the optical route difference controlling layer and the optical route difference controlling layer flattening layer, is 0.1 or more.    
   
   
       28 . The color filter for transflective type color liquid crystal display according to  claim 27 , wherein the optical route difference controlling layer flattening layer comprises a refractive index improving agent, which improves a refractive index, so that a refractive index difference, between the optical route difference controlling layer and the optical route difference controlling layer flattening layer, is 0.1 or more.  
   
   
       29 . The color filter for transflective type color liquid crystal display according to  claim 25 , wherein the convex-concave on the surface of the optical route difference controlling layer is composed of a plurality of concave portions formed by a curved surface on the surface of the optical route difference controlling layer.  
   
   
       30 . The color filter for transflective type color liquid crystal display according to  claim 27 , wherein the convex-concave on the surface of the optical route difference controlling layer is composed of a plurality of concave portions formed by a curved surface on the surface of the optical route difference controlling layer.  
   
   
       31 . A transflective color liquid crystal display comprising the color filter for transflective type color liquid crystal display according to  claim 12.