Flexible organic EL display device, and front panel for display device

Patent metadata

Field	Value
Publication number	US-12539688-B2
Application number	US-202117906687-A
Country	US
Kind code	B2
Filing date	Mar 23, 2021
Priority date	Mar 23, 2020
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

The present disclosure provides a flexible organic electroluminescence display device comprising a front panel placed on an observer side of an organic electroluminescence display panel, wherein the front panel includes a glass substrate, with a thickness of 100 μm or less, on the organic electroluminescence display panel, and a resin layer on the glass substrate; in a plane of the resin layer, when a composite elastic modulus of a first direction is regarded as E1, a composite elastic modulus of a second direction that is a direction orthogonally crossing the first direction is regarded as E2, E1/E2 is 1.2 or more; and an angle formed by a folding direction of the flexible organic electroluminescence display device and the first direction is 45° or more and 90° or less.

First claim

The invention claimed is:

1 . A flexible organic electroluminescence display device comprising:
an organic electroluminescence display panel; and a front panel placed on an observer side of the organic electroluminescence display panel, wherein the front panel includes a glass substrate, with a thickness of 100 μm or less, on the organic electroluminescence display panel, and a resin layer on the glass substrate; in a plane of the resin layer, when a composite elastic modulus of a first direction is regarded as E1, and a composite elastic modulus of a second direction that is a direction orthogonally crossing the first direction is regarded as E2, E1/E2 is 1.2 or more; and an angle formed by a folding direction of the flexible organic electroluminescence display device and the first direction is 45° or more and 90° or less.

2 . The flexible organic electroluminescence display device according to claim 1 , wherein an average value of the composite elastic moduli E1 and E2 is 4.0 GPa or more.

3 . The flexible organic electroluminescence display device according to claim 1 , wherein the front panel includes a pressure-sensitive adhesive layer between the glass substrate and the resin layer.

4 . The flexible organic electroluminescence display device according to claim 1 , wherein the organic electroluminescence display panel, the front panel, and a functional layer on the resin layer of the front panel are included in this order.

5 . The flexible organic electroluminescence display device according to claim 1 , wherein the E1/E2 is 3.0 or less.

6 . A front panel for a display device, comprising:
a glass substrate with a thickness of 100 μm or less; and a resin layer on the glass substrate, wherein in a plane of the resin layer, when a composite elastic modulus of a first direction is regarded as E1, a composite elastic modulus of a second direction that is a direction orthogonally crossing the first direction is regarded as E2, E1/E2 is 1.2 or more, and wherein an average value of the composite elastic modulus of the first direction E1 and the composite elastic modulus of the second direction E2 is 4.0 GPa or more.

7 . The front panel for a display device according to claim 6 , wherein the glass substrate, the resin layer, and a functional layer on the resin layer are included in this order.

8 . The front panel for a display device according to claim 6 , wherein the E1/E2 is 3.0 or less.

9 . A front panel for a display device, comprising:
a glass substrate with a thickness of 100 μm or less; and a resin layer on the glass substrate, wherein in a plane of the resin layer, when a composite elastic modulus of a first direction is regarded as E1, a composite elastic modulus of a second direction that is a direction orthogonally crossing the first direction is regarded as E2, E1/E2 is 1.2 or more, and wherein a pressure-sensitive adhesive layer is included between the glass substrate and the resin layer.

10 . The front panel for a display device according to claim 9 , wherein the glass substrate, the resin layer, and a functional layer on the resin layer are included in this order.

11 . The front panel for a display device according to claim 9 , wherein the E1/E2 is 3.0 or less.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Sato Jun
• Furui Gen
• Kobayashi Atsuhiro
• Ogawa Yoshimasa

Classifications

• H10K2102/311

  Flexible OLED · CPC title

• H10K59/87 Primary

  Passivation; Containers; Encapsulations · CPC title

• B32B2457/206

  Organic displays, e.g. OLED · CPC title

• B32B2367/00

  Polyesters, e.g. PET, i.e. polyethylene terephthalate · CPC title

• B32B2307/7376

  Thickness · CPC title