Display device

Abstract

A display device includes: a substrate; a plurality of pixels on the substrate, and each of the pixels including first to third sub-pixels each including at least one light emitting diode configured to emit light; and a color conversion layer including first to third color conversion patterns respectively corresponding to the first to third sub-pixels, each of the first to third color conversion patterns configured to transmit the light or convert the light into light of a different color. The light emitting diode of each of the first to third sub-pixels is coupled to a first electrode and a second electrode. At least one of the first to third color conversion patterns includes a perovskite compound.

What is claimed is: 
     
         1 . A display device comprising:
 a substrate;   a plurality of pixels on the substrate, each of the pixels comprising first to third sub-pixels each comprising at least one light emitting diode configured to emit light; and   a color conversion layer comprising first to third color conversion patterns respectively corresponding to the first to third sub-pixels, each of the first to third color conversion patterns being configured to transmit the light or convert the light into light of a different color,   wherein the light emitting diode of each of the first to third sub-pixels is coupled to a first electrode and a second electrode,   wherein at least one of the first to third color conversion patterns comprises a perovskite compound, and   wherein the perovskite compound is represented by formula 1 below:
   AMX 3   [Formula 1]
 
   wherein A is a monovalent organic cation or a monovalent transition metal or alkali metal cation, M is a divalent transition metal, rare earth metal, alkaline earth metal, Pb, Sn, Ge, Ga, In, Al, Sb, Bi or Po cation, X is selected from the group consisting of halogen anions and combinations thereof, and two or more of X are identical or different.   
     
     
         2 . The display device according to  claim 1 , wherein the perovskite compound has a form selected from the group consisting of a quantum dot, a nanocrystal, a nanoplate, a nanosheet, and combinations thereof. 
     
     
         3 . The display device according to  claim 1 , wherein a composite comprises the perovskite compound and a polymer. 
     
     
         4 . The display device according to  claim 1 , wherein the color conversion pattern is provided by scattering or stacking the perovskite compound in a dielectric matrix. 
     
     
         5 . The display device according to  claim 1 , wherein at least one of the first to third color conversion patterns further comprises a scatterer. 
     
     
         6 . The display device according to  claim 1 , wherein the color conversion layer further comprises first to third color filters respectively on the first to third color conversion patterns. 
     
     
         7 . A display device comprising:
 a substrate;   a plurality of pixels on the substrate, each of the pixels comprising first to third sub-pixels each comprising at least one light emitting diode configured to emit light; and   a color conversion layer comprising first to third color conversion patterns respectively corresponding to the first to third sub-pixels, each of the first to third color conversion patterns being configured to transmit the light or convert the light into light of a different color,   wherein the light emitting diode of each of the first to third sub-pixels is coupled to a first electrode and a second electrode,   wherein at least one of the first to third color conversion patterns comprises a perovskite compound, and   wherein the perovskite compound is represented by formula 3 below:
   A 2 MM′X 6   [Formula 3]
 
   wherein A is selected from the group consisting of monovalent organic cations, monovalent transition metal and alkali metal cations, and combinations thereof, M is a monovalent transition metal, alkali metal or In cation, M′ may be a trivalent cation, X is selected from the group consisting of halogen anions and combinations thereof, and two or more of A, M or X are identical or different.   
     
     
         8 . The display device according to  claim 7 , wherein the perovskite compound has a form selected from the group consisting of a quantum dot, a nanocrystal, a nanoplate, a nanosheet, and combinations thereof. 
     
     
         9 . The display device according to  claim 7 , wherein a composite comprises the perovskite compound and a polymer. 
     
     
         10 . The display device according to  claim 7 , wherein the color conversion pattern is provided by scattering or stacking the perovskite compound in a dielectric matrix. 
     
     
         11 . The display device according to  claim 7 , wherein at least one of the first to third color conversion patterns further comprises a scatterer. 
     
     
         12 . The display device according to  claim 7 , wherein the color conversion layer further comprises first to third color filters respectively on the first to third color conversion patterns. 
     
     
         13 . A display device comprising:
 a substrate;   a plurality of pixels on the substrate, each of the pixels comprising first to third sub-pixels each comprising at least one light emitting diode configured to emit light; and   a color conversion layer comprising first to third color conversion patterns respectively corresponding to the first to third sub-pixels, each of the first to third color conversion patterns being configured to transmit the light or convert the light into light of a different color,   wherein the light emitting diode of each of the first to third sub-pixels is coupled to a first electrode and a second electrode,   wherein at least one of the first to third color conversion patterns comprises a perovskite compound, and   wherein the perovskite compound is represented by formula 4 below:
   A 2 MX 4   [Formula 4]
 
   wherein A is selected from the group consisting of monovalent organic cations, monovalent transition metal and alkali metal cations, and combinations thereof, M is a divalent metal cation, X is selected from the group consisting of halogen anions and combinations thereof, and two or more of A or X are identical or different.   
     
     
         14 . The display device according to  claim 13 , wherein the perovskite compound has a form selected from the group consisting of a quantum dot, a nanocrystal, a nanoplate, a nanosheet, and combinations thereof. 
     
     
         15 . The display device according to  claim 13 , wherein a composite comprises the perovskite compound and a polymer. 
     
     
         16 . The display device according to  claim 13 , wherein the color conversion pattern is provided by scattering or stacking the perovskite compound in a dielectric matrix. 
     
     
         17 . The display device according to  claim 13 , wherein at least one of the first to third color conversion patterns further comprises a scatterer. 
     
     
         18 . The display device according to  claim 13 , wherein the color conversion layer further comprises first to third color filters respectively on the first to third color conversion patterns.