3D Image Display Device

Abstract

The present invention provides a 3D image display device. The 3D image display device includes a backlight module; a first linear polaroid disposed in front of the backlight module to polarize the light from the backlight module; a first liquid crystal layer disposed in front of the first linear polaroid; a second linear polaroid disposed in front of the first liquid crystal layer, the second linear polaroid having a determined polarizing angle to polarize image signals; a second liquid crystal layer disposed in front of the second linear polaroid to switch a linear polarization orientation of image signals; and a retarding layer disposed in front of the second liquid crystal layer to transform the linear polarization orientation into a circular polarization orientation.

What is claimed is: 
     
         1 . A 3D image display device, comprising:
 a backlight module;   a first linear polaroid disposed in front of said backlight module, said first linear polaroid having a first polarization orientation;   a first liquid crystal layer disposed in front of said first linear polaroid;   a second linear polaroid disposed in front of said first liquid crystal layer, said second linear polaroid having a second polarization orientation;   a second liquid crystal layer disposed in front of said second linear polaroid to change a linear polarization orientation of image signals; and   a retarding layer disposed in front of said second liquid crystal layer to transform said linear polarization orientation into a circular polarization orientation.   
     
     
         2 . The device of  claim 1 , wherein said first polarization orientation comprises 45 degree angle. 
     
     
         3 . The device of  claim 1 , wherein said second polarization orientation comprises 135 degree angle. 
     
     
         4 . The device of  claim 1 , wherein gray levels of said second liquid crystal layer are switched to a minimum gray level or a maximum gray level to control said linear polarization orientation of said image signals passing through said second liquid crystal layer. 
     
     
         5 . The device of  claim 4 , wherein said minimum gray level comprises 0. 
     
     
         6 . The device of  claim 4 , wherein said maximum gray level comprises 255. 
     
     
         7 . The device of  claim 1 , wherein said retarding layer has a phase retardation of quarter wavelength. 
     
     
         8 . The device of  claim 1 , wherein said retarding layer remains said image signals on an X axis and retards said image signals on a Y axis. 
     
     
         9 . A 3D image display device, said 3D image display device including a first liquid crystal layer, said 3D image display device comprising:
 a linear polaroid disposed in front of said first liquid crystal layer, said linear polaroid having a polarization orientation;   a shifting layer disposed in front of said linear polaroid to change a linear polarization orientation of image signals; and   a retarding layer disposed in front of said shifting layer to transform said linear polarization orientation into a circular polarization orientation.   
     
     
         10 . The device of  claim 9 , wherein said polarization orientation comprises 135 degree angle. 
     
     
         11 . The device of  claim 9 , wherein gray levels of said shifting layer are switched to a minimum gray level or a maximum gray level to control said linear polarization orientation of said image signals passing through said shifting layer. 
     
     
         12 . The device of  claim 11 , wherein said minimum gray level comprises 0. 
     
     
         13 . The device of  claim 11 , wherein said maximum gray level comprises 255. 
     
     
         14 . The device of  claim 9 , wherein said retarding layer has a phase retardation of quarter wavelength. 
     
     
         15 . The device of  claim 9 , wherein said retarding layer remains said image signals on an X axis and retards said image signals on a Y axis.