Display device

Abstract

Provided is a display device that can retard the degradation of light-emitting elements even when the display device is used in a high temperature environment. A display device—includes a TFT layer, a light-emitting element layer provided with a plurality of light-emitting elements, and a thermal insulation layer that insulates the plurality of light-emitting elements from external heat. The thermal insulation layer is made from a material containing a first resin in which a metal complex compound having an ammonium salt as a ligand is dispersed.

1 . A display device comprising:
 a light-emitting element layer provided with a plurality of light-emitting elements; and   a TFT layer provided below the light-emitting element layer and including TFT configured to drive the plurality of light-emitting elements,   wherein at least one thermal insulation layer configured to thermally insulate the plurality of light-emitting elements from external heat is provided, and   the thermal insulation layer comprises a material containing a first resin in which a metal complex compound having an ammonium salt as a ligand is dispersed.   
     
     
         2 . The display device according to  claim 1 ,
 wherein metal atoms included in the metal complex compound are atoms of a refractory metal.   
     
     
         3 . The display device according to  claim 1 ,
 wherein the metal atoms included in the metal complex compound are atoms of at least one type of metal selected from the group consisting of tungsten, tantalum, chromium, niobium, and vanadium.   
     
     
         4 . The display device according to  claim 2 ,
 wherein the metal complex compound is represented by the following general formula (1):
   (NH 4 ) m [XS n ]  (1)
 
   where, m denotes an integer from 1 to 3, n denotes an integer from 1 to 4, and X denotes the metal atom.   
     
     
         5 . The display device according to  claim 1 ,
 wherein a mixing ratio of the metal complex compound to the first resin is from 1 mol % to 30 mol %.   
     
     
         6 . The display device according to  claim 1 ,
 wherein the first resin includes at least one type of resin selected from the group consisting of polyimides, polyamides, polyesters, and acrylic resins.   
     
     
         7 . The display device according to  claim 1 ,
 comprising a substrate,   wherein the thermal insulation layer is formed between the substrate and the TFT layer.   
     
     
         8 . The display device according to  claim 7 ,
 wherein the substrate is a flexible substrate provided with a resin layer made from a second resin, and   the first resin and the second resin are the same resin.   
     
     
         9 . The display device according to  claim 1 ,
 wherein the thermal insulation layer is a flexible substrate.   
     
     
         10 . The display device according to  claim 1 ,
 comprising a substrate,   wherein the thermal insulation layer is formed on a side of the substrate opposite a surface on which the TFT layer is formed.   
     
     
         11 . The display device according to  claim 1 ,
 wherein the thermal insulation layer is formed covering the plurality of light-emitting elements.   
     
     
         12 . The display device according to  claim 1 ,
 further comprising a sealing film covering the plurality of light-emitting elements,   wherein the thermal insulation layer is provided on the sealing film.   
     
     
         13 . The display device according to  claim 1 ,
 comprising a sealing film including the thermal insulation layer and an inorganic layer, and covering the light-emitting element layer.   
     
     
         14 . The display device according to  claim 1 ,
 comprising a heat dissipating layer configured to dissipate heat from the plurality of light-emitting elements,   wherein the TFT layer is formed between the heat dissipating layer and the light-emitting element layer.   
     
     
         15 . The display device according to  claim 14 ,
 wherein an extraction member configured to extract the heat to the outside is connected to the heat dissipating layer,   in a plan view, the heat dissipating layer overlaps the plurality of light-emitting elements,   in a plan view, the thermal insulation layer surrounds the heat dissipating layer, and   the extraction member is formed overlapping the thermal insulation layer in a plan view.   
     
     
         16 . The display device according to  claim 14 ,
 wherein the heat dissipating layer comprises a material including an acrylic resin in which inorganic nanoparticles are dispersed.   
     
     
         17 . The display device according to  claim 16 ,
 wherein the inorganic nanoparticles are at least one type selected from the group consisting of silver, copper, aluminum, magnesium, tin, silicon, and oxides thereof.   
     
     
         18 . The display device according to  claim 16 ,
 wherein a content of the inorganic nanoparticles contained in the material of the heat dissipating layer is from 5 to 40 wt. % relative to an amount of the acrylic resin.