Touch-integrated display panel and display device having the same

Patent metadata

Field	Value
Publication number	US-2017192610-A1
Application number	US-201615254924-A
Country	US
Kind code	A1
Filing date	Sep 1, 2016
Priority date	Dec 30, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

A touch-integrated display panel includes a substrate, a plurality of first and second pixels, a touch electrode, and a shield electrode. The substrate has an active area and a non-active area outside of the active area. The plurality of first pixels are disposed in the active area, and the plurality of second pixels are disposed in the non-active area. The touch electrode is formed by electrically connecting the common voltage electrodes of a group of first pixels among the plurality of first pixels. The shield electrode is formed by electrically connecting the common voltage electrodes of the plurality of second pixels. The shield electrode is disposed to surround the active area.

First claim

What is claimed is:

1 . A touch-integrated display panel comprising:
a substrate having an active area and a non-active area outside the active area; a plurality of first and second pixels respectively comprising pixel electrodes and common voltage electrodes, the first pixels disposed in the active area and the second pixels disposed in the non-active area; a touch electrode comprising the common voltage electrodes of a first pixels group in the plurality of first pixels that are electrically connected; and a shield electrode comprising the common voltage electrodes of the plurality of second pixels that are electrically connected, the shield electrode surrounding the active area.

2 . The touch-integrated display panel according to claim 1 , further comprising:
a touch driving circuit electrically connected to the touch electrode; at least one first driving line positioned on a different layer from the common voltage electrodes, the first driving line electrically connecting the touch driving circuit and the touch electrode; a second driving line electrically connecting the touch driving circuit and the shield electrode.

3 . The touch-integrated display panel according to claim 2 , further comprising a third driving line positioned outward of the plurality of second pixels and on the same layer as the second driving line, the third driving line electrically connected to the touch driving circuit.

4 . The touch-integrated display panel according to claim 3 , wherein the first, second and third driving lines receive signals having synchronized phases.

5 . The touch-integrated display panel according to claim 4 , wherein the first, second, and third driving lines receive the same touch driving signals.

6 . The touch-integrated display panel according to claim 4 , wherein the touch driving circuit receives a response signal only from the first driving line in response to the touch driving signals and processes the received response signal accordingly.

7 . The touch-integrated display panel according to claim 2 , wherein the second driving line electrically connects two adjacent and spaced apart second pixels to each other in the plurality of second pixels.

8 . The touch-integrated display panel according to claim 3 , wherein the first, second and third driving lines are formed of a material different from a data line of the display panel and disposed on layers different from the data line.

9 . The touch-integrated display panel according to claim 3 , wherein the first, second, and third drive lines are formed of the same material and disposed on the same layer on an organic protective layer.

11 . The touch-integrated display panel according to claim 9 , wherein the organic protective layer includes one of photo-acryl, acrylate, polyamide, and benzocyclobutene (BCB).

12 . The touch-integrated display panel according to claim 3 , wherein the first, second, and third driving lines includes one of aluminum, aluminum-neodymium, copper, molybdenum, molybdenum-titanium, and chromium.

13 . A touch-integrated display device comprising:
a display panel comprising a plurality of first pixels disposed in an active area, a plurality of second pixels disposed in a non-active area, a touch electrode comprising common voltage electrodes of a first pixels group in the plurality of first pixels that are electrically connected, and a shield electrode comprising common voltage electrodes of the plurality of second pixels that are electrically connected, the shield electrode surrounding the active area; and a touch driving circuit supplying touch driving signals to the touch electrode and the shield electrode.

14 . The touch-integrated display device according to claim 13 , wherein the touch driving circuit supplies the touch driving signals having synchronized phases to the touch electrode and the shield electrode.

15 . The touch-integrated display device according to claim 13 , wherein the touch driving circuit receives a response signal only from the first driving line in response to the touch driving signals and processes the received response signal accordingly.

16 . A method of driving a touch-integrated display device having a driving circuit, a touch electrode disposed in an active area and a shield electrode disposed outside the active area, comprising:
supplying a touch driving signal to the touch electrode through a first driving line disposed in the active area; supplying a first load free signal to the shield electrode through a second driving line; and supplying a second load free signal to a third driving line disposed outside the shield electrode, wherein the first and second load free signals and the touch driving signal have substantially the same phase.

17 . The method of driving a touch-integrated display device according to claim 16 , wherein the touch driving circuit receives a response signal only from the first driving line in response to the touch driving signals and processes the received response signal accordingly.

18 . The method of driving a touch-integrated display device according to claim 16 , wherein the first load free signal, the second load free signal and the touch driving signal substantially remove coupling capacitors generated at the touch electrode, the shield electrode, and the third driving lines.

Assignees

• Lg Display Co Ltd

Inventors

• Park Sunja
• Seo Dongmin
• Kim Inseop

Classifications

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F2201/123

  pixel · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G02F2201/121

  common or background · CPC title