METHOD AND CIRCUIT FOR DISPLAY PANEL TO SUPPLY SYNC SIGNAL TO TOUCH PANEL

• US 20160253021A1
• Filed: 10/16/2014
• Published: 09/01/2016
• Est. Priority Date: 09/25/2014
• Status: Abandoned Application

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: SYU, Shensian, LI, Chunhuai
• Application Number:
  US14/424,137
• Publication Number:
  US 20160253021A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Abstract

The present invention provides a method and a circuit for a display panel to supply a sync signal to a touch panel. The method includes Step 1: providing a display panel (1) and a touch panel (3); Step 2: forming a driving block (51) on the display panel (1); Step 3: connecting the driving block (51) via a lead wire to a sync signal output pin of the display drive IC (15); Step 4: forming a sensing block (53) on the touch panel (3) such that the driving block (51) and the sensing block (53) constitute a capacitor C; Step 5: connecting the sensing block (53) via a lead wire to a sync signal input pin of the touch controller IC (35); and Step 6: the display drive IC (15) generating a sync signal that is outputted through the sync signal output pin thereof to be sensed by the capacitor C to generate a sensing signal such that the sensing signal is transmitted to the touch controller IC (35) to be sensed by a capacitor of the touch controller IC (35) to obtain the sync signal.

Claims

1. A method for a display panel to supply a sync signal to a touch panel, comprising the following steps:

Step 1;

providing a display panel and a touch panel, wherein the display panel comprises a display drive integrated circuit (IC) and the touch panel comprises a touch controller IC;

Step 2;

forming a driving block on the display panel;

Step 3;

connecting the driving block via a lead wire to a sync signal output pin of the display drive IC;

Step 4;

forming a sensing block on the touch panel at a location exactly corresponding to the driving block so that the driving block and the sensing block form a capacitor C;

Step 5;

connecting the sensing block via a lead wire to a sync signal input pin of the touch controller IC; and

Step 6;

the display drive IC generating a sync signal in a horizontal blank interval or a vertical blank interval of the display panel and outputted through the sync signal output pin thereof to be sensed by the capacitor C to generate a sensing signal such that the sensing signal is transmitted to the touch controller IC to be sensed by a capacitor of the touch controller IC to obtain the sync signal.

2. The method for a display panel to supply a sync signal to a touch panel as claimed in claim 1, wherein the display panel further comprises an array substrate, a color filter substrate opposite to the array substrate, and a display panel flexible printed circuit assembly (FPCA);

and the touch panel further comprises a plurality of touch sensors and a touch panel FPCA electrically connected to the plurality of touch sensors, the touch panel FPCA being electrically connected to the touch controller IC; and

the driving block is arranged in a circumferential area of the array substrate; and

the sensing block is formed on a surface of the touch panel FPCA that faces the circumferential area of the array substrate and at a location to be exactly opposite to the driving block.

3. The method for a display panel to supply a sync signal to a touch panel as claimed in claim 1, wherein the driving block is a metal electrode.

4. The method for a display panel to supply a sync signal to a touch panel as claimed in claim 1, wherein the driving block is an indium tin oxide (ITO) electrode.

5. The method for a display panel to supply a sync signal to a touch panel as claimed in claim 1, wherein the sensing block is a metal electrode.

6. A circuit for a display panel to supply a sync signal to a touch panel, comprising a display drive integrated circuit (IC), a driving block connected via a lead wire to a sync signal output pin of the display drive IC, a sensing block opposite to the driving block, and a touch controller IC connected via a lead wire to the sensing block, the driving block and the sensing block constituting a capacitor C.

7. The circuit for a display panel to supply a sync signal to a touch panel as claimed in claim 6, wherein the driving block is formed on the display panel and the sensing block is formed on the touch panel at a location exactly corresponding to the driving block.

8. The circuit for a display panel to supply a sync signal to a touch panel as claimed in claim 7, wherein the display panel comprises an array substrate, a color filter substrate opposite to the array substrate, and a display panel flexible printed circuit assembly and the touch panel comprises a plurality of touch sensors and a touch panel FPCA electrically connected to the plurality of touch sensors, the touch panel FPCA being electrically connected to the touch controller IC;

and

the driving block is arranged in a circumferential area of the array substrate; and

the sensing block is formed on a surface of the touch panel FPCA that faces the circumferential area of the array substrate and at a location to be exactly opposite to the driving block.

9. The circuit for a display panel to supply a sync signal to a touch panel as claimed in claim 6, wherein the driving block is a metal electrode or an indium tin oxide (ITO) electrode.

10. The circuit for a display panel to supply a sync signal to a touch panel as claimed in claim 6, wherein the sensing block is a metal electrode.

11. A method for a display panel to supply a sync signal to a touch panel, comprising the following steps:

Step 1;

providing a display panel and a touch panel, wherein the display panel comprises a display drive integrated circuit (IC) and the touch panel comprises a touch controller IC;

Step 2;

forming a driving block on the display panel;

Step 3;

connecting the driving block via a lead wire to a sync signal output pin of the display drive IC;

Step 4;

forming a sensing block on the touch panel at a location exactly corresponding to the driving block so that the driving block and the sensing block form a capacitor C;

Step 5;

connecting the sensing block via a lead wire to a sync signal input pin of the touch controller IC; and

Step 6;

the display drive IC generating a sync signal in a horizontal blank interval or a vertical blank interval of the display panel and outputted through the sync signal output pin thereof to be sensed by the capacitor C to generate a sensing signal such that the sensing signal is transmitted to the touch controller IC to be sensed by a capacitor of the touch controller IC to obtain the sync signal;

wherein the display panel further comprises an array substrate, a color filter substrate opposite to the array substrate, and a display panel flexible printed circuit assembly (FPCA); and

the touch panel further comprises a plurality of touch sensors and a touch panel FPCA electrically connected to the plurality of touch sensors, the touch panel FPCA being electrically connected to the touch controller IC; and

the driving block is arranged in a circumferential area of the array substrate; and

the sensing block is formed on a surface of the touch panel FPCA that faces the circumferential area of the array substrate and at a location to be exactly opposite to the driving block;

wherein the driving block is a metal electrode; and

wherein the sensing block is a metal electrode.