Liquid crystal display device

Abstract

A liquid crystal display device for displaying an image by changing orientation of a liquid crystal layer sealed between two substrates includes a lower substrate having a microstructure which outputs light incident on a side surface of the lower substrate to an upper surface of the lower substrate, a light source emitting light to the side surface of the lower substrate, a selective reflection panel provided on the upper surface of the lower substrate to reflect light having a predetermined incident angle or more and transmit the remaining light, and a reflection panel provided under the lower substrate.

1 . A liquid crystal display device for displaying an image by changing orientation of a liquid crystal layer sealed between two substrates, the device comprising: 
 a lower substrate having a microstructure which outputs light incident on a side surface of the lower substrate to an upper surface of the lower substrate;    a light source emitting light to the side surface of the lower substrate;    an optical panel provided on the upper surface of the lower substrate and including a selective reflection portion to reflect light having a predetermined incident angle or greater and transmit the remaining light, and a total reflection portion reflecting all light; and    a reflection panel provided under the lower substrate.    
   
   
       2 . The liquid crystal display device as claimed in  claim 9 , further comprising a polarization panel polarizing light incident on the liquid crystal layer.  
   
   
       3 . The liquid crystal display device as claimed in claim  10 , wherein the polarization panel is disposed between the microstructure and the reflection panel.  
   
   
       4 . The liquid crystal display device as claimed in claim  10 , wherein the polarization panel is disposed above the optical panel.  
   
   
       5 . The liquid crystal display device as claimed in  claim 9 , wherein the optical panel is formed such that at least one selective reflection portion and at least one total reflection portion are located in each pixel.  
   
   
       6 . The liquid crystal display device as claimed in  claim 9 , wherein the microstructure is selectively formed only at a position where light is transmitted through the selective reflection portion.  
   
   
       7 . The liquid crystal display device as claimed in  claim 9 , wherein the microstructure is a holographic pattern having a diffraction grating structure.  
   
   
       8 . The liquid crystal display device as claimed in claim  15 , wherein the holographic pattern is formed at at least one of a lower surface and the upper surface of the lower substrate.  
   
   
       9 . The liquid crystal display device as claimed in claim  15 , wherein the interval between gratings of the holographic pattern is not greater than 2 μm.