Diffusively reflective film, method of manufacturing the same, light guiding module, backlight assembly, and liquid crystal display apparatus having the same

Abstract

A diffusively reflective film includes a base film, a light reflection layer and a light diffusion layer. The base film is flexible. The light reflection layer is disposed on the base film. The light reflection film reflects a first light. The light diffusion layer is disposed on the light reflection layer. The light diffusion layer diffuses the first light to form a second light. The diffusively reflective film may be bent to cover the light guide plate without being broken so as to increase the amount of light. Thus, a display quality is enhanced. Further, the diffusively reflective film covers the first side face, the second side face and the first face of light guide plate at once. Thus, productivity is enhanced and its manufacturing cost is reduced.

1 . A diffusively reflective film comprising: 
 a base film that is flexible;    a light reflection layer disposed on the base film, the light reflection film reflecting a first light; and    a light diffusion layer disposed on the light reflection layer, the light diffusion layer diffusing the first light to form a second light.    
   
   
       2 . The diffusively reflective film of  claim 1 , wherein the base film comprises polyethylene terepthalate (PET).  
   
   
       3 . The diffusively reflective film of  claim 1 , wherein the light reflection layer comprises a metal.  
   
   
       4 . The diffusively reflective film of  claim 3 , wherein the metal is silver (Ag), aluminum (Al), or aluminum alloy.  
   
   
       5 . The diffusively reflective film of  claim 1 , wherein the light reflection layer comprises a plurality of beads attached on the light reflection layer, the beads diffusing the first light to form the second light.  
   
   
       6 . The diffusively reflective film of  claim 1 , wherein the light diffusion layer comprises a binder and a plurality of beads, the binder being mixed with the beads and coated on the light reflection layer, the binder and the beads diffusing the first light to form the second light.  
   
   
       7 . A method of manufacturing a diffusively reflective film comprising: 
 forming a light reflection layer on a base film that is flexible, the light reflection layer reflecting a first light; and    forming a light diffusing layer on the light reflection layer, the light diffusing layer diffusing the first light.    
   
   
       8 . The method of  claim 7 , wherein the light reflection layer are formed by coating a metal thin film on the base film.  
   
   
       9 . The method of  claim 8 , wherein the metal thin film is coated on the base film by a vacuum plating.  
   
   
       10 . The method of claim of  claim 7 , wherein the metal thin film is coated on the base film by a sputtering method.  
   
   
       11 . The method of  claim 7 , wherein the light diffusion layer is formed via attaching a plurality of beads on the light reflection layer.  
   
   
       12 . The method of  claim 7 , wherein the light diffusion layer is formed via coating a binder that is mixed with a plurality of beads on the light reflection layer.  
   
   
       13 . A light guiding module comprising: 
 a light guide plate that transforms a first light having a first light distribution into a second light having a second light distribution, so that the second light exits the light guide plate; and    a diffusively reflective film that covers a portion of the light guide plate to diffusively reflect a third light that leaks from the portion of the light guide plate toward the light guide plate.    
   
   
       14 . The light guiding module of  claim 13 , wherein the light guide plate comprises first and second side faces, and first and second faces, the first and second side faces connecting the first and second faces, such that the first and second faces face with each other, the first light entering the light guide plate via the first side face, the second light exiting the light guide plate via the second face.  
   
   
       15 . The light guiding module of  claim 14 , wherein the diffusively reflective film is disposed under the light guide plate, such that the diffusively reflective film facing the first face of the light guiding plate.  
   
   
       16 . The light guiding module of  claim 14 , wherein the diffusively reflective film is bent to cover the first face and the second side face.  
   
   
       17 . The light guiding module of  claim 14 , wherein the diffusively reflective film is bent to cover the first and second side faces and the first face, a portion of the diffusively reflective film corresponding to the first side face, the portion of the diffusively reflective film including an opening, the first light entering the light guide plate through the opening.  
   
   
       18 . The light guiding module of  claim 13 , wherein the diffusively reflective film comprises a base film that is flexible, a light reflection layer disposed on the base film, and a light diffusion layer that is disposed on the light reflection layer such that the light diffusion layer faces the light guide plate, a third light that leaks from the light guide plate being reflected on the light reflection layer and diffused by the light diffusion layer to be formed a fourth light.  
   
   
       19 . The light guiding module of  claim 18 , wherein the light reflection layer is a metal thin film, and the light reflection layer includes a plurality of beads diffusing the third light.  
   
   
       20 . The light guiding module of  claim 18 , wherein the light reflection layer is a metal thin film, and the light reflection layer includes a binder and a plurality of beads mixed with the binder, the binder and the beads diffusing the third light.  
   
   
       21 . A backlight assembly comprising: 
 a receiving container;    a lamp disposed in the receiving container, the lamp generating a first light having a first light distribution;    a light guide plate disposed in the receiving container, the light guide plate transforming the first light into a second light having a second light distribution; and    a diffusively reflective film disposed in the receiving container, the diffusively reflective film diffusively reflecting a third light that leaks from the light guide plate toward the light guide plate.    
   
   
       22 . The backlight assembly of  claim 21 , wherein the light guide plate comprises first and second side faces, and first and second faces, the first and second side faces connecting the first and second faces, such that the first and second faces face with each other, the first light entering the light guide plate via the first side face, the second light exiting the light guide plate via the second face.  
   
   
       23 . The backlight assembly of  claim 22 , wherein the diffusively reflective film faces the first face of the light guide plate.  
   
   
       24 . The backlight assembly of  claim 23 , wherein the diffusively reflective film is bent to cover the second side face and the first face of the light guide plate.  
   
   
       25 . The backlight assembly of  claim 24 , wherein the lamp is a light emitting diodes, which are disposed to face the first side face.  
   
   
       26 . The backlight assembly of  claim 22 , wherein the diffusively reflective film is bent to cover the first and second side faces and the first face, a portion of the diffusively reflective film corresponding to the first side face, the portion of the diffusively reflective film including an opening, the first light entering the light guide plate through the opening.  
   
   
       27 . The backlight assembly of  claim 26 , wherein a light emitting diode (LED) that generates the first light is disposed in the receiving container.  
   
   
       28 . The backlight assembly of  claim 22 , wherein the diffusively reflective film comprises a base film that is flexible, a light reflection layer disposed on the base film, and a light diffusion layer disposed on the light reflection layer.  
   
   
       29 . A liquid crystal display apparatus comprising: 
 a receiving container;    a lamp disposed in the receiving container, the lamp generating a first light having a first light distribution;    a light guide plate disposed in the receiving container, the light guide plate transforming the first light into a second light having a second light distribution;    a diffusively reflective film disposed in the receiving container, the diffusively reflective film diffusively reflects a third light that leaks from the light guide plate toward the light guide plate; and    a liquid crystal display panel that transforms the second light into an image light containing an image information.