Display device

Abstract

A display device includes a transparent substrate, and a plurality of single-crystal thin-film semiconductor light-emitting elements disposed on one side of the transparent substrate. Each of the single-crystal thin-film semiconductor light-emitting elements is composed of single-crystal thin-film semiconductor layers separated from a base substrate, and includes a light-emitting layer and two non-light-emitting layers disposed on both sides of the light-emitting layer.

1 . A display device comprising:
 a transparent substrate, and   a plurality of single-crystal thin-film semiconductor light-emitting elements disposed on one side of said transparent substrate,   wherein each of said single-crystal thin-film semiconductor light-emitting elements is composed of single-crystal thin-film semiconductor layers separated from a base substrate, and includes a light-emitting layer and two non-light-emitting layers disposed on both sides of said light-emitting layer.   
   
   
       2 . The display device according to  claim 1 , wherein each of said non-light-emitting layers has a higher energy band gap than said light-emitting layer. 
   
   
       3 . The display device according to  claim 1 , wherein images are formed on both sides of said transparent substrate using lights emitted from first sides of said single-crystal thin-film semiconductor light emitting elements, and lights emitted from second sides of said single-crystal thin-film semiconductor light emitting elements and passing through said transparent substrate. 
   
   
       4 . The display device according to  claim 1 , wherein said single-crystal thin-film semiconductor light-emitting elements are arranged one-dimensionally or two-dimensionally. 
   
   
       5 . The display device according to  claim 1 , further comprising a drive control circuit that sends light emission signals to said single-crystal thin-film semiconductor light-emitting elements along a scanning direction,
 wherein said drive control circuit reverses said scanning direction at constant time intervals.   
   
   
       6 . The display device according to  claim 1 , wherein said single-crystal thin-film semiconductor light-emitting elements include:
 a first single-crystal thin-film semiconductor light-emitting element disposed on said transparent substrate, and   a second single-crystal thin-film semiconductor light-emitting element formed on said first single-crystal thin-film semiconductor light-emitting element via a non-light-transmission layer,   wherein said first and second single-crystal thin-film semiconductor light-emitting elements are respectively composed of different single-crystal thin-film semiconductor layers with different light-emitting layers.   
   
   
       7 . The display device according to  claim 6 , wherein said non-light-transmission layer reflects or absorbs lights emitted by said light-emitting layers of said first and second single-crystal thin-film semiconductor light-emitting elements. 
   
   
       8 . The display device according to  claim 6 , further comprising a drive control circuit that independently controls light emissions of said first and second single-crystal thin-film semiconductor light-emitting elements disposed on both sides of said non-light-transmission layer. 
   
   
       9 . The display device according to  claim 1 , wherein said single-crystal thin-film semiconductor light-emitting elements include first and second single-crystal thin-film semiconductor light-emitting elements which are disposed adjacent to each other,
 wherein a first non-light-transmission layer is formed on a top of said first single-crystal thin-film semiconductor light-emitting element, and   wherein a second non-light-transmission layer is formed between said second single-crystal thin-film semiconductor light-emitting element and said transparent substrate.   
   
   
       10 . The display device according to  claim 9 , wherein said first non-light-transmission layer and said second non-light-transmission layer reflect or absorb lights respectively emitted by said first and second single-crystal thin-film semiconductor light-emitting elements. 
   
   
       11 . The display device according to  claim 9 , wherein a combination of said first and second single-crystal thin-film semiconductor light-emitting elements are arranged one-dimensionally or two-dimensionally. 
   
   
       12 . The display device according to  claim 9 , further comprising a drive control circuit that independently controls light emissions of said first and second single-crystal thin-film semiconductor light-emitting elements.