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US 9,960,375 B2Granted
Organic light-emitting display device
AssigneeLG Display Co., Ltd.
InventorsJooHwan Shin, BongChul Kim, Jaewook Park
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Abstract
Disclosed herein is an organic light-emitting display device having a first flexible substrate; a second flexible substrate; a plurality of organic light-emitting pixels on the first flexible substrate and between the first flexible substrate and the second flexible substrate; an encapsulation unit covering the pixels; and an adhesive layer on the encapsulation unit. The Young's modulus of the adhesive layer is equal to or larger than a value so that the first flexible substrate is not deformed by bending stress when it is rolled up.
Claims22
A flexible organic light-emitting display device comprising:
- a first flexible substrate;
- a second flexible substrate;
- a plurality of organic light-emitting pixels on the first flexible substrate and interposed between the first flexible substrate and the second flexible substrate;
- and
- an adhesive layer on the plurality of organic light-emitting pixels, the adhesive layer adhering together the first flexible substrate and the second flexible substrate,
- wherein the flexible organic light-emitting display device is in a rolled up form such that the first flexible substrate and the second flexible substrate are curved toward the first flexible substrate,
- wherein the adhesive layer has a Young's modulus that is equal to or larger than a value such that the first flexible substrate is not deformed by bending stress if the flexible organic light-emitting display device is reverted from a rolled up form,
- wherein a thickness of the adhesive layer is determined with respect to a thickness of the first flexible substrate, a curvature radius threshold of the first flexible substrate, and the Young's modulus of the adhesive layer,
- wherein the second flexible substrate has a Young's modulus that is larger than the Young's modulus of the adhesive layer, and
- wherein the second flexible substrate comprises a metal plate having a higher breaking strength versus tensile stress than a material of the first flexible substrate.
7 more elements
A flexible organic light-emitting display device comprising:
- a first flexible substrate;
- a second flexible substrate;
- a plurality of organic light-emitting pixels on the first flexible substrate and between the first flexible substrate and the second flexible substrate;
- and
- an adhesive layer configured to adhere together the first flexible substrate and the second flexible substrate,
- wherein the flexible organic light-emitting display device is in a rolled up form such that the first flexible substrate and the second flexible substrate are curved toward the first flexible substrate,
- wherein the first flexible substrate maintains an elastic deformation property when the first flexible substrate is rolled to have a curvature radius equal to or larger than a threshold curvature radius for the first flexible substrate,
- wherein the second flexible substrate maintains an elastic deformation property when the second flexible substrate is rolled to have a curvature radius equal to or larger than a threshold curvature radius for the second flexible substrate,
- wherein the adhesive layer has an elastic deformation property,
- wherein each of the first and second flexible substrates has a Young's modulus that is larger than a Young's modulus of the adhesive layer, and
- wherein the second flexible substrate comprises a metal plate having a higher breaking strength versus tensile stress than a material of the first flexible substrate.
8 more elements
A flexible organic light-emitting display device comprising:
- a first flexible substrate;
- a plurality of organic light-emitting pixels on the first flexible substrate;
- an adhesive layer on the plurality of organic light-emitting pixels;
- and
- a second flexible substrate on the adhesive unit, the adhesive unit adhered to the second flexible substrate and the first flexible substrate,
- wherein the flexible organic light-emitting display device is in a rolled up form such that the first flexible substrate and the second flexible substrate are curved toward the first flexible substrate,
- wherein the second flexible substrates has a Young's modulus that is larger than a Young's modulus of the adhesive layer, and
- wherein the second flexible substrate comprises a metal plate having a higher breaking strength versus tensile stress than a material of the first flexible substrate.
5 more elements
Dependencies are inferred from the claim text.