Capacitive in-cell touch-screen panel and display device

• US 9,513,732 B2
• Filed: 11/08/2012
• Issued: 12/06/2016
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhao, Jiayang
• Primary Examiner(s): Lee, Nicholas
• Application Number:
  US13/995,327
• Publication Number:
  US 20140055411A1
• Time in Patent Office: 1,489 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

The present invention discloses a capacitive in-cell touch-screen panel and a display device, comprising: a touch scanning line, implemented by at least one gate line of a TFT array substrate; and a touch driver circuit connected with the touch scanning line and adapted to load touch scan signals to the touch scanning line. Compared with that an existing GOA is used to provide touch scan signals to touch scanning lines of a small-sized touch-screen panel, that a separate touch driver circuit is used to provide touch scan signals to a gate line acting as a touch scanning line can avoid a signal-delay problem.

Claims

1. A capacitive in-cell touch-screen panel, comprising:

a touch scanning line, implemented by at least one gate line of a TFT array substrate;

wherein the touch-screen panel further comprises;

a touch driver circuit connected with the touch scanning line and adapted to load touch scan signals to the touch scanning line;

an integrated gate driver circuit, connected with the touch scanning line;

a driver switch, provided between the touch scanning line and the integrated gate driver circuit;

wherein the integrated gate driver circuit is adapted to load gate drive signals to the touch scanning line;

wherein the driver switch is adapted, when the touch scanning line transmits touch scan signals, to switch off the connection between the integrated gate driver circuit and the touch scanning line, and, when the touch scanning line transmits gate drive signals, to switch on the connection between the touch scanning line and the integrated gate driver circuit;

wherein the integrated gate driver circuit is an array substrate row-driver circuit;

wherein the driver switch is connected with both a pull-up node (Pull-Up) and a pull-down node (Pull-Down) of the array substrate row-driver circuit; and

wherein the driver switch comprises two TFTs;

sources of the two TFTs are connected with a common ground VSS terminal of the array substrate row-driver circuit, respectively, and drains of the two TFTs are connected with the pull-up node (Pull up) and the pull-down node (Pull down) of the array substrate row-driver circuit, respectively, and gates of the two TFTs are connected mutually.

2. The touch-screen panel according to claim 1, wherein, the touch driver circuit is a source driver circuit of the TFT array substrate.

3. The touch-screen panel according to claim 1, further comprise:

a touch switch, provided between the touch scanning line and the touch driver circuit and used, when the touch scanning line transmits touch scan signals, to switch on the connection between touch driver circuit and the touch scanning line, and when the touch scanning line transmits gate drive signals, to switch off the connection between the touch scanning line and the touch driver circuit.

4. The touch-screen panel according to claim 3, wherein the touch switch is provided within the touch driver circuit, or provided at a connection site of the touch scanning line and the touch driver circuit.

5. The touch-screen panel according to claim 1, wherein the driver switch is provided within the integrated gate driver circuit, or provided at a connection site of the touch scanning line and the integrated gate driver circuit.

6. The touch-screen panel according to claim 1, wherein the touch driver circuit is also adapted, when loading touch scan signals to the touch scanning line, to input signals to the input terminal (Input) of the array substrate row-driver circuit connected with a next row gate line subsequent to that touch scanning line.

7. A display device, comprising a capacitive in-cell touch-screen panel in accordance with claim 1.