Electrostatic discharge circuit, display panel with electrostatic discharge circuit and electrostatic discharge method

Patent metadata

Field	Value
Publication number	US-10509519-B2
Application number	US-201615528738-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	Mar 14, 2016
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

Embodiments of the present invention disclose a display panel comprising a circuit board, a driving chip and a touch panel. The display panel further comprises an electrostatic discharge circuit disposed between the circuit board and the touch panel. The electrostatic discharge circuit defines an electrostatic discharge path electrically connecting the circuit board with the touch panel, and a second path through the driving chip is provided between the circuit board and the touch panel, wherein the overall impedance of the electrostatic discharge path is smaller than the overall impedance of the second path. Also a display device including the display panel is disclosed.

First claim

What is claimed is:

1. A display panel, comprising a circuit board, a driving chip, a liquid crystal display panel and a touch panel, the circuit board being connected with the liquid crystal display panel, and the circuit board and the touch panel being spaced apart from each other in a direction of a thickness of the touch panel, wherein,
the display panel further comprises an electrostatic discharge circuit disposed between the circuit board and the touch panel, and the electrostatic discharge circuit defines a first electrostatic discharge path electrically connecting the circuit board with the touch panel, wherein the electrostatic discharge circuit comprises a conductive adhesive provided on the circuit board, a first conductive layer disposed on the touch panel and a second conductive layer interposed between the conductive adhesive and the first conductive layer, the conductive adhesive covering the whole area of an end of the circuit board connected with the liquid crystal display panel, and
a second electrostatic discharge path through the driving chip is provided between the circuit board and the touch panel, wherein an overall impedance of the first electrostatic discharge path is smaller than an overall impedance of the second electrostatic discharge path.

2. The display panel according to claim 1 , wherein the electrostatic discharge circuit comprises a conductive adhesive region provided on the circuit board, and the conductive adhesive is provided in the conductive adhesive region.

3. The display panel according to claim 2 , wherein the first conductive layer comprises indium tin oxide (ITO) or indium zinc oxide (IZO).

4. The display panel according to claim 1 , wherein the second conductive layer is bonded to the circuit board through the conductive adhesive.

5. The display panel according to claim 1 , wherein the first conductive layer comprises indium tin oxide (ITO) or indium zinc oxide (IZO).

6. The display panel according to claim 1 , wherein the second conductive layer comprises an Au ball or an Ag ball.

7. The display panel according to claim 6 , wherein a diameter of the Au ball or the Ag ball is equal to a distance between the first conductive layer and the conductive adhesive region.

8. A display device comprising the display panel according to claim 1 .

9. An electrostatic discharge method for the display panel according to claim 1 , wherein electrostatic charges transmitted to the circuit board are discharged through the first electrostatic discharge path.

10. The display panel according to claim 1 , wherein the electrostatic discharge circuit is configured to discharge electrostatic charges on the circuit board through the touch panel which is grounded.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Wu Hao
• An Na
• Gong xinfeng
• Ci Gang
• Guo Baolei

Classifications

• H10W42/60

  protecting against electrostatic charges or discharges, e.g. Faraday shields (integrated devices comprising arrangements for electrical protection H10D89/60) · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• H05K9/0024

  Shield cases mounted on a PCB, e.g. cans or caps or conformal shields · CPC title