Liquid crystal display device

Abstract

A liquid crystal display device of the present invention includes a liquid crystal interposed between a CF substrate that is an ultra-thin glass substrate and a TFT substrate, and a seal pattern having an injection port. Spacer structures are arranged such that the area density thereof is higher in a corner portion farther from the injection port than in a corner portion closer to the injection port.

What is claimed is: 
     
         1 . A liquid crystal display device comprising:
 a pair of glass substrates, at least one of said substrates being an ultra-thin glass substrate;   a liquid crystal material interposed between said pair of glass substrates; and   a seal pattern for bonding said pair of glass substrates to each other, said seal pattern having an injection port that is an opening through which said liquid crystal material is injected,   wherein spacer structures for keeping the distance between said pair of glass substrates within a certain range are arranged such that the area density of said spacer structures is higher in a corner portion located at a side opposed to a side where said injection port is provided than in a corner portion located at the side where said injection port is provided.   
     
     
         2 . The liquid crystal display device according to  claim 1 , further comprising a parallax barrier that is formed directly on a surface of said ultra-thin glass substrate. 
     
     
         3 . The liquid crystal display device according to  claim 1 , wherein
 said spacer structures for keeping the distance between said pair of glass substrates within a certain range include:
 main columnar spacers that are constantly in contact with both of said pair of glass substrates to maintain said pair of glass substrates; and 
 columnar spacers that are in contact with only one of said pair of glass substrates in a normal state and that come into contact with both of said pair of glass substrates to maintain a space between said substrates only under a state where said pair of glass substrates are brought closer to each other within a range of elastic deformation of said main columnar spacers, 
   said main columnar spacers that are constantly in contact with both of said pair of glass substrates to maintain said pair of glass substrates are arranged such that the area density thereof in the corner portion located at the side opposed to the side where said injection port is provided is equal to the area density thereof in the corner portion located at the side where said injection port is provided,   said columnar spacers that come into contact with both of said pair of glass substrates only under a state where said pair of glass substrates are brought closer to each other within a range of elastic deformation of said main columnar spacers are arranged such that the area density thereof in the corner portion located at the side opposed to the side where said injection port is provided is higher than the area density thereof in the corner portion located at the side where said injection port is provided.   
     
     
         4 . The liquid crystal display device according to  claim 2 , wherein
 said spacer structures for keeping the distance between said pair of glass substrates within a certain range include:
 main columnar spacers that are constantly in contact with both of said pair of glass substrates to maintain said pair of glass substrates; and 
 other columnar spacers that are in contact with only one of said pair of glass substrates in a normal state and that come into contact with both of said pair of glass substrates to maintain a space between said substrates only under a state where said pair of glass substrates are brought closer to each other within a range of elastic deformation of said main columnar spacers, 
   said main columnar spacers that are constantly in contact with both of said pair of glass substrates to maintain said pair of glass substrates are arranged such that the area density thereof in the corner portion located at the side opposed to the side where said injection port is provided and the area density thereof in the corner portion located at the side where said injection port is provided are equal to each other,   said other columnar spacers that come into contact with both of said pair of glass substrates only under a state where said pair of glass substrates are brought closer to each other within a range of elastic deformation of said main columnar spacers are arranged such that the area density thereof in the corner portion located at the side opposed to the side where said injection port is provided is higher than the area density thereof in the corner portion located at the side where said injection port is provided.   
     
     
         5 . The liquid crystal display device according to  claim 1 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, are arranged at an area density that is set such that the amount of deformation of said spacer structures caused when an atmospheric pressure is applied to said pair of glass substrates falls within a range of elastic deformation of said spacer structures.   
     
     
         6 . The liquid crystal display device according to  claim 2 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, are arranged at an area density that is set such that the amount of deformation of said spacer structures caused when an atmospheric pressure is applied to said pair of glass substrates falls within a range of elastic deformation of said spacer structures.   
     
     
         7 . The liquid crystal display device according to  claim 3 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, are arranged at an area density that is set such that the amount of deformation of said spacer structures caused when an atmospheric pressure is applied to said pair of glass substrates falls within a range of elastic deformation of said spacer structures.   
     
     
         8 . The liquid crystal display device according to  claim 4 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, are arranged at an area density that is set such that the amount of deformation of said spacer structures caused when an atmospheric pressure is applied to said pair of glass substrates falls within a range of elastic deformation of said spacer structures.   
     
     
         9 . The liquid crystal display device according to  claim 1 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         10 . The liquid crystal display device according to  claim 2 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         11 . The liquid crystal display device according to  claim 3 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         12 . The liquid crystal display device according to  claim 4 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         13 . The liquid crystal display device according to  claim 5 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         14 . The liquid crystal display device according to  claim 6 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         15 . The liquid crystal display device according to  claim 7 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.   
     
     
         16 . The liquid crystal display device according to  claim 8 , wherein
 spacer structures for keeping the distance between said pair of glass substrates within a certain range, which are provided in the corner portion located at the side opposed to the side where said injection port is provided, have a pattern structure in which a bank-shaped spacer that is divided in said corner portion so that an opening is formed in a diagonal direction toward said corner portion is arranged or in which bank-shaped spacers are arranged along a diagonal direction toward said corner portion with longitudinal sides of said bank-shaped spacers extending in parallel with one another.