Digitizer and flexible display device comprising the same

Patent metadata

Field	Value
Publication number	US-10474266-B2
Application number	US-201815896601-A
Country	US
Kind code	B2
Filing date	Feb 14, 2018
Priority date	Feb 17, 2017
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A flexible digitizer comprising a flexible substrate and a first and a second electrodes having thicknesses of 2000 Å to 1 μm is provided. The digitizer according to the present invention has sufficient flex resistance for application to a flexible display device with superior electrical characteristics and visibility.

First claim

The invention claimed is:

1. A flexible digitizer comprising:
a flexible substrate;
a first electrode disposed on the flexible substrate and having a thickness of 2000 Å to 1 μm;
a first insulation layer disposed on the first electrode and having a through hole exposing the first electrode; and
a second electrode disposed on the first insulation layer to be electrically connected to the first electrode via the through hole and having a thickness of 2000 Å to 1 μm,
wherein the first and the second electrodes each have a line width of 3 to 30 μm and a line resistance of 1 kΩ or less, and
wherein the flexible digitizer is an electro-magnetic resonance (EMR) type digitizer.

2. The flexible digitizer of claim 1 , wherein the thicknesses of the first and the second electrodes are 3000 to 5000 Å.

3. The flexible digitizer of claim 1 , wherein the first and the second electrodes have line widths of 3 to 10 μm.

4. The flexible digitizer of claim 1 , wherein the first and the second electrodes are formed by sputtering.

5. The flexible digitizer of claim 1 , further comprising a second insulation layer disposed on the second electrode.

6. The flexible digitizer of claim 1 , further comprising a protective layer disposed on the flexible substrate, wherein the first electrode is disposed on the protective layer.

7. The flexible digitizer of claim 1 , wherein the total thickness of the digitizer is less than or equal to 50 μm.

8. A flexible display device comprising:
a digitizer according to claim 1 ; and
a display layer disposed under the digitizer.

9. A flexible display device comprising:
a digitizer according to claim 2 ; and
a display layer disposed under the digitizer.

10. A flexible display device comprising:
a digitizer according to claim 3 ; and
a display layer disposed under the digitizer.

11. A flexible display device comprising:
a digitizer according to claim 4 ; and
a display layer disposed under the digitizer.

12. A flexible display device comprising:
a digitizer according to claim 5 ; and
a display layer disposed under the digitizer.

13. A flexible display device comprising:
a digitizer according to claim 6 ; and
a display layer disposed under the digitizer.

14. A flexible display device comprising:
a digitizer according to claim 7 ; and
a display layer disposed under the digitizer.

Assignees

• Dongwoo Fine Chem Co Ltd

Inventors

• Chae Seung Jin
• Huh Yoonho
• Choi Byung Jin

Classifications

• G06F3/0442

  using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser · CPC title

• 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

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/046

  by electromagnetic means · CPC title