Display device having light emitting stacked structure

Abstract

A display device includes a plurality of pixel tiles spaced apart from each other, each of the pixel tiles including a substrate and a plurality of light emitting stacked structures disposed on the substrate, in which a distance between two adjacent light emitting stacked structures in the same pixel tile is substantially equal to a shortest distance between two adjacent light emitting stacked structures of different pixel tiles.

What is claimed is: 
     
       1. A display device, comprising:
 a base substrate; and  
 a plurality of pixel tiles spaced apart from each other, each of the pixel tiles being disposed on the base substrate and including: 
 a tile substrate different from the base substrate; and 
 a plurality of light emitting stacked structures emitters spaced apart from each other disposed on the tile substrate, each of the light emitting stacked structures emitters forming one pixel and including four electrodes and comprising a plurality of epitaxial sub-units sequentially disposed one over another to have overlapping light emitting emission areas in a vertical direction extending from the base substrate to the tile substrate, and each of the plurality of epitaxial sub-units being configured to emit different colored light, wherein the light emitters are arranged substantially regularly along a first direction and a second direction intersecting the first direction, the first and second directions being different from the vertical direction,  
 wherein a first distance between two adjacent light emitting stacked structures emitters in the same pixel tile in the first direction is substantially equal to a shortest distance, in the first direction, between two adjacent light emitting stacked structures emitters of different pixel tiles, and 
 a second distance between two adjacent light emitters in the same pixel tile in the second direction is not equal to a shortest distance, in the second direction, between two adjacent light emitters of different pixel tiles. 
 
     
     
       2. The display device of  claim 1 , wherein each of the pixel tiles has substantially the same shape. 
     
     
       3. The display device of  claim 2 , wherein:
 the tile substrate has a substantially polygonal shape; and 
 the light emitting stacked structures emitters are disposed at vertices of the polygonal shape. 
 
     
     
       4. The display device of  claim 3 , wherein:
 the tile substrate has substantially a triangular shape; and 
 the light emitting stacked structures emitters are disposed at vertices of the triangular shape. 
 
     
     
       5. The display device of  claim 1 , wherein the light emitting stacked structures are arranged substantially regularly along at least one of a first direction and a second direction intersecting the first direction. 
     
     
       6. The display device of  claim 1 , wherein the pixel tiles have different shapes from each other. 
     
     
       7. The display device of  claim 1 , wherein the tile substrate comprises a silicon substrate. 
     
     
       8. The display device of  claim 7 , wherein the tile substrate includes a penetrating electrode that penetrates upper and lower surfaces of the tile substrate and is electrically connected to the light emitting stacked structures emitters. 
     
     
       9. The display device of  claim 1 , wherein
 at least one of the epitaxial sub-units has an area different from that of another one of the epitaxial sub-units.   
     
     
       10. The display device of claim  9   1 , wherein the area of the epitaxial sub-units gradually decreases along a first the vertical direction. 
     
     
       11. The display device of  claim 10 , wherein an upper epitaxial sub-unit completely overlaps a lower epitaxial sub-unit. 
     
     
       12. The display device of claim  9   1 , wherein:
 light emitted from each of the epitaxial sub-units has a different energy band; and 
 the energy band of light gradually increases along a first the vertical direction. 
 
     
     
       13. The display device of claim  9   1 , wherein each of the epitaxial sub-units is independently drivable. 
     
     
       14. The display device of claim  9   1 , wherein light emitted from a lower epitaxial sub-unit is configured to be emitted to the outside of the display device through an epitaxial sub-unit disposed thereon. 
     
     
       15. The display device of  claim 14 , wherein an upper epitaxial stack is configured to transmit about 80% or more of light emitted from a lower epitaxial stack. 
     
     
       16. The display device of claim  9   1 , wherein the epitaxial sub-units comprise:
 a first epitaxial stack configured to emit a first color light; 
 a second epitaxial stack disposed on the first epitaxial stack and configured to emit a second color light having a wavelength band different from the first color light; and 
 a third epitaxial stack disposed on the second epitaxial stack and configured to emit a third color light having a wavelength band different from the first and second color lights. 
 
     
     
       17. The display device of  claim 16 , wherein the first, second, and third color lights are red light, green light, and blue light, respectively. 
     
     
       18. The display device of  claim 16 , wherein each of the first, second, and third epitaxial stacks comprises:
 a p-type semiconductor layer; 
 an active layer disposed on the p-type semiconductor layer; and 
 an n-type semiconductor layer disposed on the active layer. 
 
     
     
       19. The display device of  claim 1 , wherein the display device is configured to be driven in at least one of a passive matrix manner and an active matrix manner. 
     
     
       20. The display device of  claim 1 , wherein at least one of the light emitting stacked structures emitters comprises a micro LED having a surface area less than about 10,000 square μm. 
     
     
       21. The display device of  claim 1 , further comprising an adhesive layer disposed between the base substrate and each of the pixel tiles.