Organic light emitting diode display

Abstract

Disclosed is an organic light emitting diode display, including a first substrate including an organic light emitting diode and a driving circuit part for driving the light emitting diode, a second substrate facing the first substrate and covering the light emitting diode and the driving circuit part, a connection unit connected to the driving circuit part and extending from the first substrate along a rear side thereof, an electronic device disposed between the connection unit and the first substrate and transmitting a signal to the driving circuit part via the connection unit, and an electromagnetic wave-shielding sheet disposed on one side of the first substrate to directly face the electronic device and including a first conductive material layer, a buffer layer formed on one side of the first conductive material layer, and a first adhesive layer formed on the other side of the first conductive material layer.

What is claimed is: 
     
         1 . A composite sheet, comprising:
 a graphite layer;   a buffer layer formed on one side of the graphite layer; and   a first adhesive layer formed on the other side of the graphite layer,   wherein the graphite layer has a density of 1.0˜2.0 g/cm 3 , and has a heat conductivity of 400˜1900 W/mK in a planar direction and of 3˜20 W/mK in a perpendicular direction.   
     
     
         2 . The composite sheet of  claim 1 , wherein the graphite layer comprises exfoliated graphite and amorphous carbon particles having a particle size of 10˜110 nm, and an amount of the amorphous carbon particles is 5˜30 wt % based on a total weight of the exfoliated graphite and the amorphous carbon particles. 
     
     
         3 . The composite sheet of  claim 1 , wherein the buffer layer comprises a polyurethane resin. 
     
     
         4 . The composite sheet of  claim 3 , wherein the polyurethane resin further comprises 3˜5 wt % of graphite. 
     
     
         5 . The composite sheet of  claim 1 , wherein the first adhesive layer comprises 3˜40 wt % of graphite. 
     
     
         6 . The composite sheet of  claim 1 , wherein the sheet further comprises a support film formed on the first adhesive layer, and a second adhesive layer formed on the support film. 
     
     
         7 . The composite sheet of  claim 6 , wherein the second adhesive layer comprises 3˜40 wt % of graphite. 
     
     
         8 . The composite sheet of  claim 1 , wherein the sheet further comprises a conductive material layer, formed on the first adhesive layer, using a material different from the graphite layer. 
     
     
         9 . The composite sheet of  claim 8 , wherein the conductive material layer comprises at least one selected from the group consisting of gold (Au), silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), indium tin oxide (ITO), indium zinc oxide (IZO) and carbon nanotubes (CNTs).