Liquid crystal display device

Abstract

A liquid crystal display device includes: a display panel which includes a TFT array substrate and a CF substrate arranged as opposed to each other, and a liquid crystal held therebetween; and a front panel which is adhered to a front surface side of the display panel with a resin layer interposed therebetween. A display region of the display panel is provided with main spacers formed on the CF substrate and making contact with the TFT array substrate, and sub-spacers formed on the CF substrate and not reaching the TFT array substrate. A ratio of a total contact area of the main spacers and the TFT array substrate with respect to an area of the display region of the liquid crystal panel is equal to or smaller than 0.02%.

What is claimed is: 
     
         1 . A liquid crystal display device, comprising:
 a display panel which includes a pair of substrates arranged as opposed to each other and a liquid crystal held therebetween;   a main spacer which is provided on one substrate of said pair of substrates, and makes contact with the other substrate in a display region of said display panel; and   a front panel which is adhered to a front surface side of said display panel with a resin layer interposed therebetween, wherein   a ratio of a total contact area of said main spacer and the other substrate with respect to an area of said display region is equal to or smaller than 0.02%.   
     
     
         2 . The liquid crystal display device according to  claim 1 , further comprising
 a sub-spacer which is provided on said one substrate in the display region of said display panel, has a smaller height than that of said main spacer, and does not come into contact with said other substrate.   
     
     
         3 . The liquid crystal display device according to  claim 1 , wherein
 said liquid crystal is sealed between said pair of substrates by means of a peripheral seal formed in a peripheral part of said display panel, and   said resin layer extends to above a position where said peripheral seal is formed on the front surface side of said display panel.   
     
     
         4 . The liquid crystal display device according to  claim 3 , wherein
 a thermal expansion amount in a thickness direction of said display panel in said peripheral seal or a gap member included inside said peripheral seal is equivalent to a thermal expansion amount in a thickness direction of said display panel in said liquid crystal at an upper limit temperature in an allowable operating temperature range of said liquid crystal display device.   
     
     
         5 . The liquid crystal display device according to  claim 1 , wherein
 said display panel drives said liquid crystal by a horizontal electric field mode.   
     
     
         6 . The liquid crystal display device according to  claim 1 , wherein
 said front panel is a protective plate made of glass or a resin, or a touch panel.   
     
     
         7 . A liquid crystal display device, comprising:
 a display panel which includes a pair of substrates arranged as opposed to each other and a liquid crystal held therebetween;   a main spacer which is provided on one substrate of said pair of substrates, and makes contact with the other substrate in a display region of said display panel; and   a front panel which is adhered to a front surface side of said display panel with a resin layer interposed therebetween, wherein   a compressive deformation amount of said main spacer at a normal temperature is larger than an amount of increase in distance between said pair of substrates due to an influence of thermal expansion of said liquid crystal and said resin layer at an upper limit temperature in an allowable operating temperature range of said liquid crystal display device.   
     
     
         8 . The liquid crystal display device according to  claim 7 , further comprising
 a sub-spacer which is provided on said one substrate in the display region of said display panel, has a smaller height than that of said main spacer, and does not come into contact with said other substrate.   
     
     
         9 . The liquid crystal display device according to  claim 7 , wherein
 said liquid crystal is sealed between said pair of substrates by means of a peripheral seal formed in a peripheral part of said liquid crystal panel, and   said resin layer extends to above a position where said peripheral seal is formed on the front surface side of said display panel.   
     
     
         10 . The liquid crystal display device according to  claim 9 , wherein
 a thermal expansion amount in a thickness direction of said display panel in said peripheral seal or a gap member included inside said peripheral seal is equivalent to a thermal expansion amount in a thickness direction of said display panel in said liquid crystal at an upper limit temperature in an allowable operating temperature range of said liquid crystal display device.   
     
     
         11 . The liquid crystal display device according to  claim 7 , wherein
 said display panel drives said liquid crystal by a horizontal electric field mode.   
     
     
         12 . The liquid crystal display device according to  claim 7 , wherein
 said front panel is a protective plate made of glass or a resin, or a touch panel.   
     
     
         13 . A liquid crystal display device, comprising:
 a display panel which includes a pair of substrates arranged as opposed to each other and a liquid crystal held therebetween;   a front frame which is provided on a front surface side of said display panel and has an opening corresponding to a display region of said display panel; and   a front panel which is provided on a front surface side of said front frame and adhered to said display panel with a resin layer interposed therebetween, the resin layer being arranged inside the opening of said front frame, wherein   when a thickness of said front frame is Lf and a thickness of said resin layer is Ls, L≧Ls holds at an upper limit temperature in an allowable operating temperature range of said liquid crystal display device.   
     
     
         14 . The liquid crystal display device according to  claim 13 , wherein
 said display panel drives said liquid crystal by a horizontal electric field mode.   
     
     
         15 . The liquid crystal display device according to  claim 13 , wherein
 said front panel is a protective plate made of glass or a resin, or a touch panel.   
     
     
         16 . A liquid crystal display device, comprising:
 a display panel which includes a pair of substrates arranged as opposed to each other and a liquid crystal held therebetween;   a front frame which is provided on a front surface side of said display panel and has an opening corresponding to a display region of said display panel; and   a front panel which is provided on a front surface side of said front frame and adhered to said display panel with a resin layer interposed therebetween, the resin layer being arranged inside the opening of said front frame, wherein   when a thermal expansion amount of a thickness of said front frame is ΔLf and a thermal expansion amount of a thickness of said resin layer is ΔLs in a case where a temperature of said liquid crystal display device rises from a normal temperature, ΔLf≧ΔLs holds.   
     
     
         17 . The liquid crystal display device according to  claim 16 , wherein
 said display panel drives said liquid crystal by a horizontal electric field mode.   
     
     
         18 . The liquid crystal display device according to  claim 16 , wherein
 said front panel is a protective plate made of glass or a resin, or a touch panel.