Backlight suitable for display devices

Abstract

A backlit display device is disclosed. The device includes a display panel and a back reflector stack that includes a plurality of diffusive areas that are disposed over a reflective layer to form a plurality of reflective areas interspersed with the diffusive areas. The device further includes an array of light sources that are disposed between the display panel and the back reflector stack. Projections of the light sources in the array of light sources onto the back reflector stack are aligned with the diffusive areas of the back reflector stack. Projections of openings between the light sources in the array of light sources are aligned with the reflective areas of the back reflector stack.

1 . A backlit display device, comprising:
 a display panel;   a back reflector stack comprising a plurality of diffusive areas disposed over a reflective layer to form a plurality of reflective areas interspersed with the diffusive areas; and   an array of light sources disposed between the display panel and the back reflector stack; wherein projections of the light sources in the array of light sources onto the back reflector stack are aligned with the diffusive areas of the back reflector stack, and wherein projections of openings between the light sources in the array of light sources are aligned with the reflective areas of the back reflector stack.   
     
     
         2 . The backlit display device of  claim 1 , wherein the light sources in the array of light sources are LEDs. 
     
     
         3 . The backlit display device of  claim 1 , wherein the light sources in the array of light sources are elongated. 
     
     
         4 . The backlit display device of  claim 1 , wherein the reflective areas and the diffusive areas of the back reflector stack are in the shape of stripes. 
     
     
         5 . The backlit display device of  claim 1 , wherein the diffusive areas of the back reflector stack comprise a plurality of light-directing protrusions.