Liquid crystal display device and method of manufacturing that

Abstract

A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film ,and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2),d2<d1   (2).

What is claimed is: 
     
         1 . A liquid crystal display device comprising:
 a first substrate;   a second substrate opposed to the first substrate;   a first projection and a second projection provided between the first substrate and the second substrate;   alignment films provided on the first substrate and the second substrate; and   a liquid crystal layer provided between the alignment films,   wherein the alignment films have a first alignment film provided on the first substrate and a second alignment film provided on the second substrate,   wherein the first projection is covered by either the first alignment film or the second alignment film,   wherein the second projection is covered by either the first alignment film or the second alignment film,   wherein a height of the first projection is higher than a height of the second projection,   wherein a top surface of the first projection is a flat surface,   wherein a thickness of one of the alignment films on the top surface of the first projection is thicker than a thickness of one of the alignment films other than the top surface of the first projection,   wherein a thickness of one of the alignment films on the top surface of the second projection is thicker than a thickness of one of the alignment films other than the top surface of the second projection, and   wherein the thickness of one of the alignment films other than the top surface of the first projection is equal to the thickness of one of the alignment films other than the top surface of the second projection.   
     
     
         2 . The liquid crystal display device according to  claim 1 , further comprising
 a thin film transistor including a gate electrode provided on the first substrate;   a first insulation film provided on the thin film transistor;   a first electrode provided on the first insulation film;   a second insulation film provided on the first electrode and the first insulation film; and   a second electrode provided on the second insulation film,   wherein first alignment film is provided on the second insulation film and the second electrode.   
     
     
         3 . The liquid crystal display device according to claim
 wherein one of the first electrode and the second electrode is connected to the thin film transistor.   
     
     
         4 . The liquid crystal display device according to  claim 2 ,
 wherein the second projection is provided on the first substrate.   
     
     
         5 . The liquid crystal display device according to  claim 1 , further comprising
 a light shielding layer provided on the second substrate,   wherein the second alignment film provided on the light shielding layer.   
     
     
         6 . The liquid crystal display device according to  claim 5 ,
 wherein the first projection provided on the second substrate.   
     
     
         7 . The liquid crystal display device according to  claim 6 ,
 wherein the first projection provided on the light shielding layer.   
     
     
         8 . The liquid crystal display device according to  claim 1 ,
 wherein the first alignment film and the second alignment film are a photo alignment film.   
     
     
         9 . A liquid crystal display device comprising:
 a first substrate:   a thin film transistor including a source electrode provided on the first substrate;   a first insulation film provided on the thin film transistor;   a first alignment film provided on the first insulation film;   a first electrode and a second electrode provided between the first substrate and the first alignment film in a pixel region;   a second substrate;   a light shielding layer provided on the second substrate;   a projection provided on the light shielding layer;   a second alignment film provided on the light shielding layer and the projection; and   a liquid crystal layer provided between the first substrate and the second substrate,   wherein one of the first electrode and the second electrode is connected to the source electrode of the thin film transistor,   wherein top surface of the projection is a flat surface,   wherein a total thickness “b” of the first alignment film and the second alignment film between the projection and the second insulation film satisfies formula (1),   wherein a thickness of the first alignment film other than between the projection and the first insulation film is equal to a thickness of the second alignment film other than between the projection and the first insulation film,
   0 nm<b<30 nm   (1).
 
   
     
     
         10 . The liquid crystal display device according to  claim 9 ,
 wherein the first alignment film and the second alignment film are a photo alignment film.   
     
     
         11 . The liquid crystal display device according to  claim 9 ,
 wherein the second alignment film does not on a top surface of the projection.   
     
     
         12 . The liquid crystal display device according to  claim 9 ,
 wherein the thickness of the first alignment film other than between the projection and the first insulation film is a thickness of the first alignment film in the pixel region.   
     
     
         13 . The liquid crystal display device according to  claim 9 ,
 wherein the thickness of the second alignment film other than between the projection and the first insulation film is a thickness of the second alignment film on the light shielding layer adjacent to the projection.   
     
     
         14 . A liquid crystal display device comprising:
 a first substrate:   a thin film transistor including a source electrode provided on the first substrate;   a first insulation film provided on the thin film transistor;   a first alignment film provided on the first insulation film;   a first electrode and a second electrode provided between the first substrate and the first alignment film in a pixel region;   a second substrate   a light shielding layer provided on the second substrate;   a projection provided on the light shielding layer;   a second alignment film provided on the light shielding layer and the projection; and   a liquid crystal layer provided between the first substrate and the second substrate,   wherein one of the first electrode and the second electrode is connected to the source electrode of the thin film transistor,   wherein the first alignment film and the second alignment film are a photo alignment film,   wherein a total thickness “b” of the first alignment film and the second alignment film between the projection and the second insulation film satisfies formula (1),   wherein a thickness of the first alignment film other than between the projection and the first insulation film is equal to a thickness of the second alignment film other than between the projection and the first insulation film,
   0 nm<b<30 nm   (1).
 
   
     
     
         15 . The liquid crystal display device according to  claim 14 ,
 wherein a top surface of the projection is a flat surface.   
     
     
         16 . The liquid crystal display device according to  claim 14 ,
 wherein the second alignment film does not on a top surface of the projection.   
     
     
         17 . The liquid crystal display device according to  claim 14 ,
 wherein the thickness of the first alignment film other than between the projection and the first insulation film is a thickness of the first alignment film in the pixel region.   
     
     
         18 . The liquid crystal display device according to  claim 14 ,
 wherein the thickness of the second alignment film other than between the projection and the first insulation film is a thickness of the second alignment film on the light shielding layer adjacent to the projection.