Touch display device and film for touch display device

Patent metadata

Field	Value
Publication number	US-11972080-B2
Application number	US-202217962124-A
Country	US
Kind code	B2
Filing date	Oct 7, 2022
Priority date	Dec 30, 2021
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

A touch display device and a film for the touch display device, capable of increasing power efficiency to provide a hover touch function, by providing a touch display device comprising a display panel having a plurality of subpixels, and having a plurality of data lines and a plurality of gate lines electrically connected with the plurality of subpixels, a touch panel having a plurality of driving touch electrodes positioned to overlap with at least one subpixel among the plurality of subpixels, a touch driving signal for touch sensing applied to one or more driving touch electrodes among the plurality of driving touch electrodes, and a magnetic substance disposed around each of the plurality of driving touch electrodes, on the plurality of driving touch electrodes.

First claim

What is claimed is:

1. A touch display device, comprising:
a display panel having a plurality of subpixels and having a plurality of data lines and a plurality of gate lines electrically connected with the plurality of subpixels;
a touch panel having a plurality of driving touch electrodes positioned to overlap with at least one subpixel among the plurality of subpixels, a touch driving signal for touch sensing applied to one or more driving touch electrodes among the plurality of driving touch electrodes; and a magnetic substance disposed along the edge of the one or more driving touch electrodes which the touch driving signal for touch sensing is applied to, and positioned on a different layer from the plurality of driving touch electrodes.

2. The touch display device of claim 1 , wherein the plurality of driving touch electrodes are electrically connected with each other through a touch electrode connection line, and
wherein the magnetic substance is spaced apart from the touch electrode connection line.

3. The touch display device of claim 1 , wherein the magnetic substance is patterned along an edge of the driving touch electrodes, in an area on the plurality of driving touch electrodes.

4. The touch display device of claim 1 , wherein the touch panel further includes a plurality of sensing touch electrodes forming a capacitance with the plurality of driving touch electrodes.

5. The touch display device of claim 4 , wherein the plurality of driving touch electrodes and the plurality of sensing touch electrodes are positioned on different layers, with a touch insulation film interposed therebetween.

6. The touch display device of claim 1 , wherein the magnetic substance is formed of a magnetic substance pair, and
wherein a direction formed by the magnetic substance pair is opposite to a direction of a magnetic field formed by an electric field directed to an upper surface of the plurality of driving touch electrodes.

7. The touch display device of claim 1 , further comprising an electric field guide material positioned to overlap with each of the plurality of driving touch electrodes.

8. The touch display device of claim 7 , wherein the electric field guide material is formed of a single element.

9. The touch display device of claim 8 , wherein the single element is carbon.

10. The touch display device of claim 7 , wherein the electric field guide material is a carbon nanotube.

11. The touch display device of claim 7 , wherein the electric field guide material is positioned in a direction inclined from a direction perpendicular to the plurality of driving touch electrodes.

12. The touch display device of claim 7 , wherein the electric field guide material is disposed to be inclined in two or more different directions depending on positions on the touch panel.

13. The touch display device of claim 1 , further comprising:
a cover glass disposed on the display panel; and
a substrate positioned on the cover glass and having the magnetic substance disposed thereon.

14. The touch display device of claim 13 , wherein the magnetic substance is covered by an organic insulation layer including an organic material.

15. The touch display device of claim 1 , wherein a pair of magnetic substances are formed for each of the plurality of driving touch electrodes.

16. The touch display device of claim 15 , further comprising an electric field guide material disposed on the driving touch electrode of the plurality of driving touch electrodes corresponding to the pair of magnetic substances in the area surrounded by the pair of magnetic substances.

17. A film for a touch display device, the touch display device comprising:
a display panel having a plurality of subpixels, and having a plurality of data lines and a plurality of gate lines electrically connected with the plurality of subpixels; and a touch panel having a plurality of driving touch electrodes positioned to overlap with at least one subpixel among the plurality of subpixels, a touch driving signal for touch sensing applied to one or more driving touch electrodes among the plurality of driving touch electrodes, wherein the film for the touch display device comprises:
a substrate; and
a magnetic substance positioned on the substrate and disposed along the edge of the one or more driving touch electrodes which the touch driving signal for touch sensing is applied to, and positioned on a different layer from the plurality of driving touch electrodes.

18. The film for the touch display device of claim 17 , wherein a direction of a magnetic field generated by the magnetic substance corresponds to a direction of a magnetic field formed by an electric field having a direction perpendicular to the substrate.

19. The film for the touch display device of claim 17 , further comprising an electric field guide material positioned on the substrate.

20. The film for the touch display device of claim 19 , wherein the electric field guide material is a carbon nanotube.

21. The film for the touch display device of claim 19 , wherein the electric field guide material is disposed to extend in an inclined direction from a direction perpendicular to the substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Wonrae
• Jang Kyungkook
• Woo Jonghoon
• Kim Sungjin

Classifications

• G06F3/0445 Primary

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title