▎ 摘　　要

NOVELTY - Heterogeneous coated steel sheet comprises grater, a heat insulating coating layer formed on a first region of a first surface of the steel sheet and heat dissipation coating layer formed on a second region of the first surface of the steel sheet. The heat-dissipating coating layer includes graphene, and the graphene is concentrated on an interface between the steel sheet and the heat-dissipating coating layer or a surface of the heat-dissipating coating layer. The area of the second region is larger than the area of the first region. USE - The heterogeneous coated steel sheet is useful for display device (claimed) in televisions e.g. plasma display panels (PDPs), liquid crystal display (LCD), light emitting diode (LED) and organic light emitting diode (OLEDs). ADVANTAGE - The heterogeneous coated steel sheet: maintains the balance of temperature of the display module; improves the quality of the screen; prevents damage to a display panel due to heat generation of a display driver by using the heterogeneous steel plate; improves product reliability; has improved workability; and has improved heat dissipation performance. The display device: has low power consumption; has long lifespan; has excellent brightness and expressiveness; and has improved resolution and output. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for display device comprising display module, a back cover disposed behind the display module and having a coating layer on one surface and driving unit disposed behind the back cover. The heat insulating coating layer is formed in a first region of the first surface of the back cover, the heat dissipation coating layer is formed in a second region of the first surface of the back cover, the heat dissipation coating layer includes graphene, the heat insulating coating layer formed in the first region is in contact with the driving unit. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a heterogeneous coated steel sheet (Drawing includes non-English language text).