Panel assembly

• US 20070268243A1
• Filed: 05/15/2007
• Published: 11/22/2007
• Est. Priority Date: 05/16/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Choo, Dae-Ho, Kang, Ho-Min
• Granted Patent: US 8,026,987 B2
• Time in Patent Office: Days
• US Class Current: 345/104
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Abstract

According to an embodiment of the present invention a panel assembly includes a first display panel having a first insulation substrate, a second display panel having a second insulation substrate opposite to the first insulation substrate, and a touch sensing unit formed on a surface of the second insulation substrate not facing the first insulation substrate. The touch sensing unit includes an electrostatic induction insulating layer formed on the second insulation substrate, an electrostatic induction pattern layer formed on the electrostatic induction insulating layer along edges of the electrostatic induction insulating layer, and a dielectric layer that covers the electrostatic induction insulating layer and the electrostatic induction pattern layer.

Claims

1. A panel assembly, comprising:

a first display panel having a first insulation substrate;

a second display panel having a second insulation substrate opposite to the first insulation substrate; and

a touch sensing unit formed on a surface of the second insulation substrate not facing the first insulation substrate,

wherein the touch sensing unit comprises;

an electrostatic induction insulating layer formed on the second insulation substrate;

an electrostatic induction pattern layer formed on the electrostatic induction insulating layer along edges of the electrostatic induction insulating layer; and

a dielectric layer that covers the electrostatic induction insulating layer and the electrostatic induction pattern layer.

2. The panel assembly of claim 1, wherein the electrostatic induction pattern layer is made of at least one of silver (Ag), chromium (Cr), aluminum (Al), and indium tin oxide (ITO).

3. The panel assembly of claim 2, wherein the electrostatic induction pattern layer comprises:

an electrostatic induction portion in which a plurality of conductive patterns electrically separated from one another are formed along the edges of the electrostatic induction insulating layer, and

a power connection portion connected to an edge of the electrostatic induction portion so as to supply power.

4. The panel assembly of claim 1, wherein each of the electrostatic induction insulating layer and the dielectric layer is made of at least one of silicon dioxide (SiO₂), silicon nitride (Si₃N₄), alumina (Al₂O₃), and antimony tin oxide (ATO).

5. The panel assembly of claim 1, wherein the first display panel comprises a plurality of thin film transistors, a plurality of pixel electrodes, and a color filter that are formed on a surface of the first insulation substrate facing the second insulation substrate, and

the second display panel comprises a common electrode formed on a surface of the second insulation substrate facing the first insulation substrate.

6. The panel assembly of claim 5, further comprising an electromagnetic wave shield layer disposed between the electrostatic induction insulating layer and the second insulation substrate.

7. The panel assembly of claim 6, wherein the electromagnetic wave shield layer includes a transparent conductive material.

8. The panel assembly of claim 5, further comprising a first polarization layer disposed on the common electrode.

9. The panel assembly of claim 5, further comprising a second polarization layer disposed between the common electrode and the second insulation substrate.

10. The panel assembly of claim 5, further comprising a third polarization layer disposed between the electrostatic induction insulating layer and the second insulation substrate.

11. The panel assembly of claim 1, wherein the first display panel comprises a plurality of thin film transistors and pixel electrodes that are formed on a surface of the first insulation substrate facing the second insulation substrate, and

the second display panel comprises a color filter and a common electrode formed on a surface of the second insulation substrate facing the first insulation substrate.

12. The panel assembly of claim 11, wherein the color filter is disposed between the second insulation substrate and the common electrode.

13. The panel assembly of claim 12, further comprising an electromagnetic wave shield layer disposed between the electrostatic induction insulating layer and the second insulation substrate.

14. The panel assembly of claim 13, wherein the electromagnetic wave shield layer includes a transparent conductive material.

15. The panel assembly of claim 12, further comprising a first polarization layer disposed between the color filter and the second insulation substrate.

16. The panel assembly of claim 12, further comprising a second polarization layer disposed between the electrostatic induction insulating layer and the second insulation substrate.

17. The panel assembly of claim 11, wherein the common electrode is disposed between the second insulation substrate and the color filter.

18. The panel assembly of claim 17, further comprising a first polarization layer disposed between the common electrode and the second insulation substrate.

19. The panel assembly of claim 17, further comprising a second polarization layer disposed between the color filter and the common electrode.

20. The panel assembly of claim 17, further comprising a third polarization layer disposed between the electrostatic induction insulating layer and the second insulation substrate.

21. The panel assembly of claim 1, further comprising a liquid crystal layer interposed between the first display panel and the second display panel.