In-cell touch panel and touch display device

• US 10,437,363 B2
• Filed: 06/29/2017
• Issued: 10/08/2019
• Est. Priority Date: 11/23/2012
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: Ma, Jun, Zhao, Lijun
• Primary Examiner(s): Lee, Gene W
• Application Number:
  US15/638,192
• Publication Number:
  US 20170300143A1
• Time in Patent Office: 831 Days
• 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 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

The invention discloses an In-Cell touch panel and a touch display device. The In-Cell touch panel includes: a color filter substrate; a common electrode disposed on the color filter substrate; an array substrate disposed opposite the color filter substrate; an IC disposed on the array substrate; a plurality of data lines and a plurality of gate lines disposed perpendicular to the data lines are disposed on the array substrate; the common electrode is divided into a plurality of common electrode lines, where the common electrode lines also function as drive electrodes or sense electrodes, and the IC is a timesharing IC used for providing the In-Cell touch panel with display signals and touch drive signals and detecting the touch signals of the In-Cell touch panel. The In-Cell touch panel provided by the present invention can effectively reduce the requirement for load of the timesharing IC by the In-Cell touch panel.

Claims

1. A touch display device, comprising:

an in-cell touch panel and a backlight module,

wherein the in-cell touch panel comprises;

an array substrate;

a color filter substrate positioned opposite to the array substrate and arranged between the array substrate and the backlight module;

a layer of liquid crystals disposed in between the color filter substrate and the array substrate; and

a plurality of common electrode lines configured to function as drive electrodes or sense electrodes;

wherein the color filter substrate has a first surface and a second surface opposite to the first surface, wherein the backlight module is fixed to the first surface of the color filter substrate, and wherein the plurality of common electrode lines are disposed on the second surface of the color filter substrate.

2. The touch display device according to claim 1, wherein the array substrate comprises a plurality of data lines and a plurality of gate lines, wherein the gate lines are perpendicular to the data lines.

3. The touch display device according to claim 2, wherein the plurality of common electrode lines extend in a first direction, the plurality of data lines extend in a second direction, and the first direction is perpendicular to the second direction.

4. The touch display device according to claim 3, wherein the plurality of common electrode lines function as the drive electrodes and the plurality of data lines function as the sense electrodes.

5. The touch display device according to claim 3, wherein the plurality of common electrode lines function as the sense electrodes and the plurality of data lines function as the drive electrodes.

6. The touch display device according to claim 2, wherein the plurality of common electrode lines extend in a first direction, the plurality of gate lines extend in a second direction, and the first direction is perpendicular to the second direction.

7. The touch display device according to claim 6, wherein the plurality of common electrode lines function as the drive electrodes and the plurality of gate line function as the sense electrodes.

8. The touch display device according to claim 6, wherein the plurality of common electrode lines function as the sense electrodes and the plurality of gate lines function as the drive electrodes.

9. The touch display device according to claim 2, wherein the array substrate further comprises:

a protect layer formed directly on the plurality of data lines,

a first organic film layer formed on the protect layer, and

a pixel electrode layer formed on the first organic film layer, wherein the first organic film layer comprises acrylic copolymer resin.

10. The touch display device according to claim 9, wherein the in-cell touch panel further comprises a second organic film layer, wherein the second organic film layer is between the plurality of common electrode lines and the layer of liquid crystals.

11. The touch display device according to claim 10, wherein a thickness of the second organic film is within 0.5 um to 1.5 um.

12. The touch display device according to claim 1, wherein the in-cell touch panel further comprises an Integrated Circuit (IC) disposed on a periphery area of the array substrate,

wherein the IC is configured to perform a timesharing function for providing display signals and touch drive signals, and

wherein the IC is further configured to detect touch signals, and

wherein a scanning period of the IC includes a touch period and a display period, and

wherein, during the touch period, the IC provides the touch drive signals and detects the touch signals, and

wherein, during the display period, the IC provides the display drive signals.

13. The touch display device according to claim 1, wherein a line width of each common electrode line of the plurality of common electrode lines is between about 3 mm and about 5 mm.

14. The touch display device according to claim 1, wherein the array substrate further comprises a plurality of pixels arranged in pixel rows and pixel columns, and wherein a width of each common electrode line of the plurality of common electrode lines is equal to a width of a pixel row or a pixel column.

15. The touch display device according to claim 1, wherein the array substrate comprises a plurality of data lines and a plurality of gate lines, wherein a line width of each of common electrode line of the plurality of common electrode lines is greater than a line width of each data line of the plurality of data lines.

16. The touch display device according to claim 1, wherein the array substrate comprises a plurality of data lines and a plurality of gate lines, wherein a line width of each common electrode line of the plurality of common electrode lines is greater than a line width of each gate line of the plurality of gate lines.

17. The touch display device according to claim 1, wherein the array substrate has a first surface and a second surface opposite to the first surface, wherein the first surface faces the layer of liquid crystals, and wherein the second surface is viewable by the user.