Liquid crystal display device having thin polarizing film and thin phase retardation film

Abstract

A LCD device having a thin phase retardation film is disclosed, which is achieved using a thin film polarizing film formed by accurately processing a thin aluminum film, a polarizing film of a nano imprint lithography method that uses polymer, and a polarizing film and a liquid crystal material that form a polarizing nano material thin film by uniformly coating a polarizing nano material (TCF).

1 . In a LCD (Liquid Crystal Display) device in which a first polarizing region and a second polarizing region are integrally formed at a surface of a first transparent substrate disposed at a front surface of a backlight unit, and a liquid crystal layer filled with liquid crystal is disposed between a first alignment film and a second alignment film, and a second transparent electrode and a color filter are disposed at a front surface of the second alignment film, a LCD device having a thin polarizing film and a tin phase retardation film characterized in that a first polarizing region having a polarizing direction of 0° or 45° and a second polarizing region having a polarizing direction of 90° or 135° formed on a surface of the first transparent substrate are orthogonal from each other and are aligned on the same plane, and a first insulation layer is stacked on the front surfaces of the first polarizing region and the second polarizing region, and next to that, the first transparent electrode and a first alignment film are disposed, and a liquid crystal layer, a second alignment film, a second transparent electrode, a color filter and a second insulation layer are sequentially disposed, and a third polarizing region and a fourth polarizing region are disposed on the same plane in a structure that the polarizing directions of the same are orthogonal 90° with respect to the first polarizing region and the second polarizing region on the front surface, and next to that a second transparent substrate is disposed, and a non-reflection coating layer is disposed at the front most surface.  
   
   
       2 . The device of either  claim 1 , wherein a ¼ phase retardation film is disposed at a front surface of the second transparent substrate for thereby converting an incident light into a circular polarizing light.  
   
   
       3 . The device of either  claim 1 , wherein the aligning directions of the first alignment film and the second alignment film are either vertical or in the same direction at the portions corresponding to the first polarizing region and the second polarizing region.  
   
   
       4 . The device of either  claim 1 , wherein said thin film polarizing film is formed of an aluminum thin film or a polymer or a polarizing nano material (TCF) in a wire grid structure, and said phase retardation film is formed of a liquid crystal material.  
   
   
       5 . In a LCD device in which a backlight unit is disposed, and a liquid crystal layer filled with liquid crystal is disposed between a first alignment film and a second alignment film, and next to that a second transparent electrode and a color filter are disposed at a front surface of the second alignment film, a LCD device having a thin polarizing film and a thin phase retardation film characterized in that a third polarizing film formed of straight line polarizing films over its entire portions is disposed at a front surface of the backlight unit, and next to that a second ½ phase retardation film and a transparent unit are disposed at a front surface of the first transparent substrate with a certain width and distance on the same plane, and next to that a first insulation layer is disposed, and a first transparent electrode and a first alignment film are sequentially disposed at a front surface of the first insulation layer, and then a crystal layer, a second alignment film, a second transparent thin film, a color filter, and a second insulation layer are sequentially disposed, and next to that a third polarizing region and a fourth polarizing region are disposed on the same plane, and next to that a second transparent substrate is disposed, and a non-reflection coating layer is disposed at a front most surface.  
   
   
       6 . The device of either  claim 5 , wherein a ¼ phase retardation film is disposed at a front surface of the second transparent substrate for thereby converting an incident light into a circular polarizing light.  
   
   
       7 . The device of either  claim 5 , wherein the aligning directions of the first alignment film and the second alignment film are either vertical or in the same direction at the portions corresponding to the first polarizing region and the second polarizing region.  
   
   
       8 . The device of either  claim 5 , wherein said thin film polarizing film is formed of an aluminum thin film or a polymer or a polarizing nano material (TCF) in a wire grid structure, and said phase retardation film is formed of a liquid crystal material.  
   
   
       9 . In a LCD device in which a first transparent substrate is disposed at a front surface of a backlight unit, and a fifth polarizing region having a 0° or 45° polarizing direction and a sixth polarizing region  61  having a 90° or 135° polarizing direction are integrally formed on a surface of the first transparent substrate in an orthogonal structure on the same plane, and a first insulation layer is stacked at the front surfaces of the fifth polarizing region and the sixth polarizing region, and a liquid crystal layer is disposed between the first and second alignment films, and a second transparent electrode and a color filter are disposed at a front surface of the second alignment film, and next to that a second insulation layer, a seventh polarizing region, an eighth polarizing region and a second transparent substrate are sequentially disposed, and a non-reflection coating layer is disposed at the front most surface, a LCD device characterized in that a first polarizing region and a second polarizing region are integrally formed in a lattice shape, and a third polarizing region and a fourth polarizing region are disposed on the same plane in a lattice shape in a structure that the polarizing directions of the first polarizing region and the second polarizing region are orthogonal at 90°, and next to that a second transparent substrate is disposed, and a ¼ phase retardation film is disposed following the second transparent substrate.  
   
   
       10 . The device of  claim 9 , wherein the polarizing films of said fifth polarizing region, said sixth polarizing region, said seventh polarizing region and said eighth polarizing region are formed of conductive polarizing films.  
   
   
       11 . In a LCD device in which a backlight unit is disposed, and a third polarizing film formed of straight line polarizing films is disposed at a front surface of the backlight unit over its entire portions, and next to that a third ½ phase retardation film and a transparent unit are aligned at a front surface of the first transparent substrate, and next to that a first insulation layer is provided, and a first transparent electrode and a first alignment film are sequentially aligned at a front surface of the first insulation layer, and a liquid crystal layer is disposed between the first alignment film and the second alignment film, and a second transparent electrode, a color filter and a second insulation layer are sequentially disposed at a front surface of the second alignment film, and next to that a seventh polarizing region, an eighth polarizing region and a second transparent substrate are sequentially disposed, and a non-reflection coating layer is disposed at a front most surface, a LCD device having a thin polarizing film and a thin phase retardation film characterized in that the third ½ phase retardation film and the transparent unit are aligned in a lattice shape on the same plane, and the seventh polarizing region and the eighth polarizing region are integrally formed in a lattice shape on the same plane, and next to that a second transparent substrate is disposed, and a ¼ phase retardation film is disposed next to the second transparent substrate for converting an incident light into a circular polarizing light.