Liquid crystal display device and polarized light irradiation method as well as apparatus thereof device

Abstract

A process for manufacturing a liquid crystal display device and a liquid crystal display device in which the orientation film formed on a substrate is irradiated by polarized UV light while heating the substrate.

What is claimed is:  
     
         1 . A process for manufacturing a liquid crystal display device including a step of irradiating polarized UV light to an orientation film formed on a substrate while heating the substrate.  
     
     
         2 . A process for manufacturing a liquid crystal display device according to    claim 1   , wherein the heating is provided by a stage associated with the substrate.  
     
     
         3 . A process for manufacturing a liquid crystal display device according to    claim 2   , wherein the heating is provided by the stage which moves the substrate.  
     
     
         4 . A process for manufacturing a liquid crystal display device according to    claim 1   , wherein the UV light is provided by a light source which is at least one of an excimer laser, argon laser, gas laser, solid-state laser, semiconductor laser and pigment laser.  
     
     
         5 . A process for manufacturing a liquid crystal display device according to    claim 1   , wherein the UV light is provided by a light source which is at least one of a high-pressure, middle-pressure and low-pressure mercury arc lamp and a xenon lamp.  
     
     
         6 . A process for manufacturing a liquid crystal display device according to    claim 1   , wherein the liquid crystal display device is a lateral electric field type liquid crystal display device.  
     
     
         7 . A process for manufacturing a liquid crystal display device according to    claim 1   , wherein orientation easy axes of an upper orientation film formed on an upper substrate and a lower orientation film formed on a lower substrate are substantially parallel to one another.  
     
     
         8 . A process for manufacturing a liquid crystal display device including a step of irradiating polarized UV light to an orientation film formed on a substrate while maintaining a temperature of the substrate higher than room temperature.  
     
     
         9 . A process for manufacturing a liquid crystal display device according to    claim 8   , wherein the UV light is provided by a light source which is at least one of an excimer laser, argon laser, gas laser, solid-state laser, semiconductor laser and pigment laser.  
     
     
         10 . A process for manufacturing a liquid crystal display device according to    claim 8   , wherein the UV light is provided by a light source which is at least one of a high-pressure, middle-pressure and low-pressure mercury arc lamp and a xenon lamp.  
     
     
         11 . A process for manufacturing a liquid crystal display device according to    claim 8   , wherein the liquid crystal display device is a lateral electric field type liquid crystal display device.  
     
     
         12 . A process for manufacturing a liquid crystal display device according to    claim 8   , wherein orientation easy axes of an upper orientation film formed on an upper substrate and a lower orientation film formed on a lower substrate are substantially parallel to one another.  
     
     
         13 . A process for manufacturing a liquid crystal display device including a step of irradiating polarized UV light to an orientation film formed on a substrate for a time period while maintaining a temperature of the substrate which is higher than room temperature, the time period being less than a time period when the substrate is not maintained at the higher temperature.  
     
     
         14 . A process for manufacturing a liquid crystal display device according to    claim 13   , wherein the UV light is provided by a light source which is at least one of an excimer laser, argon laser, gas laser, solid-state laser, semiconductor laser and pigment laser.  
     
     
         15 . A process for manufacturing a liquid crystal display device according to    claim 13   , wherein the UV light is provided by a light source which is at least one of a high-pressure, middle-pressure and low-pressure mercury arc lamp and a xenon lamp.  
     
     
         16 . A process for manufacturing a liquid crystal display device according to    claim 13   , wherein said liquid crystal display device is a lateral electric field type liquid crystal display device.  
     
     
         17 . A process for manufacturing a liquid crystal display device according to    claim 13   , wherein orientation easy axes of an upper orientation film formed on an upper substrate and a lower orientation film formed on a lower substrate are substantially parallel to one another.  
     
     
         18 . A liquid crystal display device including orientation film formed on a substrate, wherein the orientation film is responsive to irradiation by polarized UV light while heating of the substrate for orientation of the orientation film.  
     
     
         19 . A liquid crystal display device according to    claim 18   , wherein the liquid crystal display device is a lateral electric filed type liquid crystal display device.  
     
     
         20 . A liquid crystal display device according to    claim 18   , wherein the liquid crystal display device has a size of at least 10 inches.