Display device

Patent metadata

Field	Value
Publication number	US-2022137678-A1
Application number	US-202117370381-A
Country	US
Kind code	A1
Filing date	Jul 8, 2021
Priority date	Nov 3, 2020
Publication date	May 5, 2022
Grant date	—

Abstract

A display device includes a display panel, a polarizing plate disposed above the display panel, a support member disposed below the display panel, where a through hole is defined in the support member, an electronic module disposed below the display panel, where the electronic module overlaps the through hole, and a protective layer disposed above the polarizing plate. The protective layer has a thickness direction retardation of greater than about 0 nm and not greater than about 1,500 nm and an in-plane retardation of greater than about 0 nm and not greater than about 200 nm.

First claim

What is claimed is:

1 . A display device comprising:
a display panel; a polarizing plate disposed above the display panel; a support member disposed below the display panel, wherein a through hole is defined in the support member; an electronic module disposed below the display panel, wherein the electronic module overlaps the through hole; and at least one protective layer disposed above the polarizing plate, wherein the protective layer has a thickness direction retardation of greater than about 0 nm and not greater than about 1,500 nm.

2 . The display device of claim 1 , wherein the at least one protective layer has an in-plane retardation perpendicular to the thickness direction of about greater than about 0 nm and not greater than about 200 nm.

3 . The display device of claim 1 , wherein the at least one protective layer has a thickness in a range of about 10 μm to about 200 μm.

4 . The display device of claim 1 , wherein the at least one protective layer has a transmittance of about 85% or greater for light in a wavelength band of about 400 nm to about 800 nm.

5 . The display device of claim 1 , wherein the at least one protective layer comprises at least one selected from polyimide, polycarbonate, cycloolefin polymer, triacetyl cellulose, polyethylene terephthalate, and polymethyl methacrylate.

6 . The display device of claim 1 , wherein
the protective layer comprises a first protective layer adjacent to the polarizing plate and a second protective layer disposed on the first protective layer, the first protective layer comprises glass or a polymer resin, and the second protective layer comprises a polymer resin.

7 . The display device of claim 6 , wherein a thickness direction retardation of the first protective layer and a thickness direction retardation of the second protective layer are different from each other.

8 . The display device of claim 6 , wherein
the first protective layer comprises glass, and the second protective layer comprises a polymer resin.

9 . The display device of claim 6 , wherein
the protective layer further comprises a third protective layer disposed between the polarizing plate and the first protective layer, wherein the third protective layer comprises a conductive material.

10 . The display device of claim 1 , wherein the electronic module is at least partially inserted into the through hole.

11 . The display device of claim 1 , further comprising:
an adhesive layer disposed between the polarizing plate and the at least one protective layer.

12 . The display device of claim 1 , wherein:
the display panel includes an active area and a peripheral area adjacent to the active area; and the through hole overlaps the active area and is defined to be spaced apart from the peripheral area on a plane.

13 . A display device comprising:
an electronic module; a display panel disposed above the electronic module and including a first display area and a second display area adjacent to the first display area, where the electronic module overlaps the second display area; a polarizing plate disposed above the display panel, wherein the polarizing plate comprises a linear polarization layer and at least one phase retardation layer; and at least one protective layer disposed above the polarizing plate, wherein the protective layer has a thickness direction retardation of greater than about 0 nm and not greater than about 1,500 nm and an in-plane retardation perpendicular to the thickness direction of greater than about 0 nm and not greater than about 200 nm.

14 . The display device of claim 13 , wherein the second display area has a lower pixel density or a lower wiring density than the first display area.

15 . The display device of claim 13 , wherein
the protective layer comprises a first protective layer adjacent to the polarizing plate and a second protective layer disposed on the first protective layer, the first protective layer comprises glass or a polymer resin, and the second protective layer comprises a polymer resin.

16 . The display device of claim 15 , wherein a thickness direction retardation of the first protective layer and a thickness direction retardation of the second protective layer are different from each other.

17 . The display device of claim 13 , wherein the at least one protective layer has a thickness in a range of about 10 μm to about 200 μm.

18 . The display device of claim 13 , wherein an angle formed between a transmission axis of the linear polarization layer and a first optical axis of the protective layer is about 45±5°.

19 . The display device of claim 13 , wherein
the at least one phase retardation layer comprises a λ/2 phase retardation layer and a λ/4 phase retardation layer, and the linear polarization layer is closer to the λ/2 phase retardation layer than the λ/4 phase retardation layer.

20 . The display device of claim 19 , wherein:
an angle between a transmission axis of the linear polarization layer and a second optical axis of the λ/2 phase retardation layer is about 15±5°; and an angle between a transmission axis of the linear polarization layer a third optical axis of the λ/4 phase retardation layer is about 75±5°.

21 . The display device of claim 13 , wherein:
the polarizing plate further comprises a base film disposed above the linear polarization layer; and an angle between a transmission axis of the linear polarization layer and a fourth optical axis of the base film is about 45±5°.

Assignees

• Samsung Display Co Ltd

Inventors

• Chung Seunghwan
• Ahn Hung Kun
• Jang Seokwon
• Jo Jungkyu

Classifications

• G02F1/133634

  the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis · CPC title

• G02F1/133331

  Cover glasses · CPC title

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• G09F9/00 Primary

  Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) · CPC title

• G02B5/3083

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title