Method for Forming Multiple Alignment Films on a Substrate and Pixel Structure of a Liquid Crystal Display

Abstract

A method for forming the alignment films on the substrate and a pixel structure of a liquid crystal display are disclosed. The pixel structure comprises a plurality of pixel units arranged in arrays. Each of the pixel units comprises a first substrate, a second substrate, two first alignment films and two second alignment films. The first alignment film is different from the second alignment film. The second substrate is disposed opposite to the first substrate. The two first alignment films and the two second alignment films are individually disposed on the first substrate and the second substrate, while each of the first alignment films is disposed substantially opposite to one of the second alignment films. The method for forming the alignment films comprises the following steps: (1) forming a trench on the substrate to divide each of the pixel units into a first sub-pixel area and a second sub-pixel area, (2) forming the first alignment film on the first sub-pixel area of the substrate and then, (3) forming a second alignment film on the second sub-pixel area of the substrate at last.

1 . A method for forming multiple alignment films on a substrate, the substrate comprising a plurality of pixel areas arranged in arrays, the method comprising the steps of:
 forming a trench on the substrate to divide each of the pixel areas into a first sub-pixel area and a second sub-pixel area;   forming a first alignment film on the first sub-pixel area on the substrate; and   forming a second alignment film on the second sub-pixel area on the substrate.   
     
     
         2 . The method as claimed in  claim 1 , wherein the substrate includes a color filter substrate. 
     
     
         3 . The method as claimed in  claim 1 , wherein the substrate includes an array substrate. 
     
     
         4 . The method as claimed in  claim 1 , wherein both the steps of forming the first alignment film and the second alignment film include a step of inkjet printing. 
     
     
         5 . The method as claimed in  claim 1 , wherein the step of forming the trench comprises forming the trench with a depth substantially between 0.5 and 10 micrometers and a width substantially between 1 and 50 micrometers. 
     
     
         6 . The method as claimed in  claim 1 , wherein the steps of forming the first alignment film and the second alignment film comprise the step of forming the first alignment films adjacent to each other and the second alignment films adjacent to each other in at least one portion of two adjacent pixel units on the substrate. 
     
     
         7 . The method as claimed in  claim 1 , wherein the steps of forming the first alignment film and the second alignment film comprise the step of forming the first alignment film and the second alignment film adjacent to each other in at least one portion of two adjacent pixel units on the substrate. 
     
     
         8 . The method as claimed in  claim 1 , wherein the steps of forming the first alignment film and the second alignment film are using different alignment materials. 
     
     
         9 . A pixel structure of a liquid crystal display, comprising a plurality of pixel units arranged in arrays, each of the pixel units comprising:
 a first substrate;   a second substrate, disposed corresponding to the first substrate;   two first alignment films, respectively disposed on the first substrate and the second substrate; and   two second alignment films, respectively disposed on the first substrate and the second substrate,   wherein each of the first alignment films is disposed substantially opposite to one of the second alignment films.   
     
     
         10 . The pixel structure as claimed in  claim 9 , wherein the first alignment film and the second alignment film have different alignment materials. 
     
     
         11 . The pixel structure as claimed in  claim 10 , wherein a material of one of the first alignment film and the second alignment film is selected from one of a group consisting of a twisted nematic (TN) alignment material, a vertical alignment (VA) material and a in-plane switching (IPS) alignment material. 
     
     
         12 . The pixel structure as claimed in  claim 9 , wherein the first alignment film and the second alignment film have different thicknesses. 
     
     
         13 . The pixel structure as claimed in  claim 9 , wherein the first alignment film is disposed substantially obliquely opposite to one of the second alignment films. 
     
     
         14 . The pixel structure as claimed in  claim 13 , wherein, the second alignment films, disposed on the first substrate in two adjacent pixel units of the arrays, are disposed adjacent to each other, and the first alignment films, disposed on the second substrate and in the two adjacent pixel units of the arrays, are disposed adjacent to each other. 
     
     
         15 . The pixel structure as claimed in  claim 13 , wherein the first alignment films, disposed on the first substrate in two adjacent pixel units of the arrays, are disposed adjacent to each other, and the second alignment films, disposed on the second substrate in the two adjacent pixel units of the arrays, are disposed adjacent to each other. 
     
     
         16 . The pixel structure as claimed in  claim 9 , wherein the first alignment film is disposed substantially directly opposite one of the second alignment films. 
     
     
         17 . The pixel structure as claimed in  claim 16 , wherein the first alignment films, disposed on the first substrate in two adjacent pixel units of the arrays, are disposed adjacent to each other, and the first alignment films, disposed on the second substrate in the two adjacent pixel units of the arrays, are disposed adjacent to each other. 
     
     
         18 . The pixel structure as claimed in  claim 16 , wherein the second alignment films, disposed on the first substrate in two adjacent pixel units of the arrays, are disposed adjacent to each other, and the second alignment films, disposed on the second substrate in the two adjacent pixel units of the arrays, are disposed adjacent to each other. 
     
     
         19 . The pixel structure as claimed in  claim 9 , further comprising at least one first trench and at least one second trench, wherein the at least one first trench is disposed on the first substrate and adapted to separate the first alignment film from the second alignment film on the first substrate, and the at least one second trench is disposed on the second substrate and adapted to separate the first alignment films from the second alignment films on the second substrate. 
     
     
         20 . The pixel structure as claimed in  claim 19 , wherein each of the at least one first trench and the at least one second trench has a depth substantially between 0.5 and 10 micrometers and a width substantially between 1 and 50 micrometers. 
     
     
         21 . The pixel structure as claimed in  claim 19 , wherein the second substrate further comprises at least one pixel storage capacitor, disposed opposite to the at least one first trench. 
     
     
         22 . The pixel structure as claimed in  claim 9 , further comprising a liquid crystal layer, disposed between the first substrate and the second substrate. 
     
     
         23 . A pixel structure of a liquid crystal display, comprising a plurality of pixel units arranged in arrays, each of the pixel units having a first sub-pixel area and a second sub-pixel area, the pixel units comprising:
 a first substrate;   a second substrate, disposed corresponding to the first substrate;   two first alignment films, respectively disposed on the first substrate and the second substrate of the first sub-pixel area; and   two second alignment films, respectively disposed on the first substrate and the second substrate of the second sub-pixel area, wherein the second alignment films are different from the first alignment films.   
     
     
         24 . A pixel structure of a liquid crystal displayer, comprising a plurality of pixel units arranged in arrays, each of the pixel units having a first sub-pixel area and a second sub-pixel area, the pixel units comprising:
 a first substrate;   a second substrate, disposed corresponding to the first substrate;   two first alignment films, respectively disposed on the first substrate of the first sub-pixel area and on the second substrate of the second sub-pixel area; and   two second alignment films, respectively disposed on the first substrate of the second sub-pixel area and on the second substrate of the first sub-pixel area, wherein the second alignment films are different from the first alignment films.