Stretchable display
Provided is a stretchable display including an elastic body, a light emitting unit on the elastic body, and a wiring unit on the elastic body, wherein the light emitting unit includes a first substrate unit on the elastic body, a buffer layer on the first substrate unit, and a light emitting element on the buffer layer, the wiring unit includes a second substrate unit on the elastic body, a driving element configured to control the light emitting element, a wiring configured to electrically connect the driving element and the light emitting element, and an insulation layer configured to cover the driving element and the wiring, the light emitting unit and the wiring unit have respective corrugation structures, a thickness of the light emitting unit is larger than that of the wiring unit, a modulus of elasticity of the buffer layer is larger than that of the insulation layer, and a modulus of elasticity of the elastic body is smaller than that of the insulation layer.
1. A stretchable display comprising: an elastic body;
a light emitting unit on a first surface of the elastic body; and
a wiring unit on the first surface of the elastic body, wherein the light emitting unit comprises: a first portion of a substrate on the elastic body;
a buffer layer on the first portion of the substrate; and
a light emitting element on the buffer layer, the wiring unit comprises:
a second portion of the substrate on the elastic body adjacent to the first portion of the substrate;
a driving element on the second portion of the substrate spaced apart from the buffer layer in a direction along the first surface of the elastic body, the driving element configured to control the light emitting element;
a wiring on the second portion of a substrate configured to electrically connect the driving element and the light emitting element; and
an insulation layer configured to cover the driving element and the wiring, a first portion of the insulation layer on the second portion of the substrate,
the light emitting unit and the wiring unit have respective corrugation structures, such that the first surface of the elastic body has a wave shape and the corrugation structures of the light emitting unit and the wiring unit are wave shapes that correspond to the wave shape of the first surface of the elastic body, a second portion of the insulation layer extends into the light emitting unit to cover a portion of the buffer layer, a thickness of the light emitting unit, from the first surface of the elastic body to a top surface of the second portion of the insulation layer in the light emitting unit, is larger than that of the wiring unit, from the first surface of the elastic body to a top surface of the first portion of the insulation layer in the wiring unit, a modulus of elasticity of the buffer layer is larger than that of the insulation layer, and a modulus of elasticity of the elastic body is smaller than that of the insulation layer.
2. The stretchable display of claim 1 , wherein a thickness of the buffer layer is larger than that of the insulation layer.
3. The stretchable display of claim 1 , wherein a corrugation period of the light emitting unit is larger than that of the wiring unit.
4. The stretchable display of claim 1 , wherein the buffer layer comprises one of an inorganic material and an organic and inorganic composite material, and
the insulation layer comprises a polymer resin.
5. The stretchable display of claim 1 , wherein a thickness of the light emitting unit is 10 times to 100 times larger than that of the wiring unit.
6. The stretchable display of claim 2 , wherein a thickness of the buffer layer is 10 times to 100 times larger than that of the insulation layer.
7. The stretchable display of claim 1 , wherein the first substrate unit and the second substrate unit comprises one among a polyimide resin, a polyethylene terephthalate (PET) resin, a polyethersulfone (PES) resin, and a ploycarbonate resin.
8. The stretchable display of claim 1 , wherein the wiring unit surrounds the light emitting unit in a planar manner.
9. The stretchable display of claim 1 , wherein the light emitting unit further comprises a first encapsulation unit configured to cover the light emitting element, and
the wiring unit further comprises a second encapsulation layer configured to cover the insulation layer.
10. The stretchable display of claim 1 , wherein a top portion of the elastic body has adhesive property.
11. The stretchable display of claim 1 , further comprising: an adhesive layer provided between the elastic body and the first portion of the substrate and between the elastic body and the second portion of the substrate.
12. The stretchable display of claim 1 , further comprising:
an encapsulation layer covering each of the light emitting unit and the wiring unit,
wherein a distance from the first surface of the elastic body to the encapsulation layer is greater in the light emitting unit than in the wiring unit.
13. The stretchable display of claim 1 , wherein the insulation layer contacts a side of the light emitting element, and
each of the insulation layer and the light emitting element contacts a same surface of the buffer layer opposite the elastic layer.