Thermal mangement article having thermal wave guide

An article, comprising:

• a stack of display layers including a display layer having high refractive index is sandwiched between two display layers having low refractive index, the display layers comprising a light-emitting device that generates heat and light during use;
• the heat generated by the display layers forming localized heat-sources in the stack;
• and
• wherein the display layer with the high refractive index is a thermal transport layer through which the localized heat-sources-induced electromagnetic waves propagate along an optical waveguide plane and can transport the heat generated by the light-emitting device away from the light-emitting device.

An article, comprising:

• a stack of display layers including
• a thermal transport layer having a high-shear modulus sandwiched between two display layers having a low-shear modulus, the display layers comprising a light-emitting device that generates heat and light during use;
• the heat generated by the display layers forming localized heat-sources in the stack and diffused into the thermal transport layers;
• and wherein the diffused heat-sources-induced guided elastic waves propagate along an acoustic waveguide plane in the thermal transport layer by lattice vibration or thermal excited elastic waves from a localized heat-source to an external heat sink;
• or
• a thermal transport layer having a high refractive index sandwiched between two display layers having a low refractive index, the display layers comprising a light-emitting device that generates heat and light during use;
• the heat generated by the display layers forming localized heat-sources in the stack and diffused into the thermal transport layers;
• and wherein the diffused heat-sources-induced guided electromagnetic waves and guide elastic waves propagate along an acoustic and optical waveguide plane in the thermal transport layer from the localized heat-source to an external heat sink;
• or
• a thermal transport layer having an integration of a transparent metal oxide layer and sub-nanometer thick metal coating layer sandwiched between two display layers with a low-shear modulus that can transport heat generated by localized heat-sources in the light-emitting device in the display layer, by electronic transportation and lattice vibration from a localized heat-source to an external heat sink.