Display device

Patent metadata

Field	Value
Publication number	US-9810814-B2
Application number	US-201414582739-A
Country	US
Kind code	B2
Filing date	Dec 24, 2014
Priority date	Jun 30, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A display device can include: a display panel configured to include a first substrate and a second substrate, and a cover substrate disposed on the display panel and configured to contain a carbonate compound.

First claim

What is claimed is:

1. A display device comprising:
a display panel configured to include a first substrate and a second substrate; and
a cover substrate disposed on the display panel and configured to contain a resin composition of a mixture of polymethylmethacrylate (PMMA) and a carbonate compound,
wherein the carbonate compound is ethylene carbonate,
wherein the carbonate compound is included into the cover substrate in an amount of 5 wt % to 20 wt %,
wherein the PMMA is included into the cover substrate in an amount of 80 wt % to 90 wt %,
wherein the display device further comprises a touch panel interposed between the display panel and the cover substrate and configured to include a touch substrate loaded with sensing electrodes, and
wherein the cover substrate is formed to have a transmittance above 90%, a haze below 1.0, a dielectric constant in a range of 4.0˜8.0, and an expansion rate below 0.02% when placed under a condition of a temperature of 70° C. and a relative humidity of about 90% for 96 hours.

2. The display device of claim 1 , wherein the cover substrate is formed to have a surface hardness above 8H.

3. The display device of claim 1 , wherein the cover substrate is formed to have a bending curvature below 45 mm.

4. The display device of claim 1 , wherein the sensing electrodes are formed on a rear surface of the cover substrate.

5. The display device of claim 1 , wherein the sensing electrodes are formed on an upper surface of the display panel.

6. The display device of claim 1 , further comprising sensing electrodes formed between the first substrate and the second substrate.

7. The display device of claim 1 , wherein the display panel is a flexible display panel.

8. The display device of claim 1 , wherein the display panel is an organic light emitting display panel.

9. The display device of claim 1 , wherein the display panel is a liquid crystal display panel.

10. A display device comprising:
a display panel configured to include a first substrate and a second substrate;
touch sensing electrodes between the first substrate and the second substrate; and
a cover substrate disposed on the display panel and configured to contain a resin composition of a mixture of polymethylmethacrylate (PMMA) and a carbonate compound,
wherein the carbonate compound includes a compound represented by the following chemical formula 1:

wherein in the chemical formula 1, the terms ‘R 1 ’ through ‘R 4 ’ each is one of hydrogen and an alkyl having the number of carbon atoms corresponding to 1˜10,
wherein the carbonate compound is included into the cover substrate in an amount of 5 wt % to 20 wt %,
wherein the PMMA is included into the cover substrate in an amount of 80 wt % to 90 wt %,
wherein the cover substrate has a transmittance above 90%, and a haze below 1.0, a dielectric constant in a range of 4.0˜8.0, and an expansion rate below 0.02% when placed under a condition of a temperature of 70° C. and a relative humidity of about 90% for 96 hours.

11. The display device of claim 10 , wherein the terms ‘R 2 ’ through ‘R 4 ’ are hydrogen.

12. The display device of claim 11 , wherein the term ‘R 1 ’ is hydrogen.

13. The display device of claim 10 , wherein the cover substrate is formed to have a surface hardness above 8H.

14. The display device of claim 10 , wherein the cover substrate is formed to have a bending curvature below 45 mm.

15. The display device of claim 10 , wherein the display panel is an organic light emitting display panel or a liquid crystal display panel.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Gyu Ho
• Jang Won Bong
• Kim Nam

Classifications

• G02B1/14 Primary

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

• H01L27/323

  Electricity · mapped topic

• H01L51/004

  Electricity · mapped topic

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title