In-cell touch panel and touch display device

• US 9,727,155 B2
• Filed: 11/22/2013
• Issued: 08/08/2017
• 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: Zhao, Lijun, Ma, Jun
• Primary Examiner(s): Lee, Gene W
• Application Number:
  US14/088,295
• Publication Number:
  US 20140146246A1
• Time in Patent Office: 1,355 Days
• Field of Search: 345173-183
• 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

An In-Cell touch panel is disclosed. The panel includes a color filter substrate, a common electrode disposed on the color filter substrate, and an array substrate disposed opposite to the color filter substrate. The panel also includes an Integrated Circuit disposed on the array substrate, a plurality of data lines on the array substrate, and a plurality of gate lines on the array substrate. The gate lines are perpendicular to the data lines, the common electrode is divided into a plurality of common electrode lines, the common electrode lines are configured to function as drive electrodes or sense electrodes, the IC is configured to perform a timesharing function for providing display signals and touch drive signals. In addition, the IC is also configured to detect touch signals.

Claims

1. An In-Cell touch panel, comprising:

an array substrate;

a color filter substrate placed opposite to the array substrate;

a layer of liquid crystals disposed in between the substrates;

wherein the color filter substrate comprises a plurality of common electrode lines disposed on the surface facing the array substrate, configured to function as drive electrodes or sense electrodes;

wherein the array substrate comprises a display area and a periphery area, wherein a plurality of data lines and a plurality of gate lines are disposed in the display area on the array substrate surface facing the color filter substrate, wherein the gate lines are perpendicular to the data lines;

wherein a protect layer is formed directly on the plurality of data lines and an organic film layer is formed on the protect layer, and a pixel layer is formed on the organic film layer; and

an Integrated Circuit (IC) disposed on the 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 also configured to detect touch signals, and wherein a scanning period of the IC includes a touch period and a display period, wherein during the touch period, the IC provides the touch drive signals and detects the touch signals, and wherein the IC provides the display drive signals during the display period.

2. The In-Cell touch panel according to claim 1, wherein the line width of each of the common electrode lines is between about 3 mm and about 5 mm.

3. The In-Cell touch panel according to claim 1, wherein the line width of each of the common electrode lines is equal to the width of the pixel row or pixel column.

4. The In-Cell touch panel according to claim 1, further comprising:

a pixel electrode layer formed above the protect layer, wherein the organic film comprises an acrylic copolymer resin.

5. The In-Cell touch panel according to claim 4, wherein the organic film is formed between the protect layer and the pixel electrode layer.

6. The In-Cell touch panel according to claim 1, wherein the line width of the common electrode lines is greater than a line width of the data lines.

7. The In-Cell touch panel according to claim 1, wherein the line width of the common electrode lines is greater than a line width of the gate lines.

8. The In-Cell touch panel according to claim 1, wherein the array substrate further comprises a plurality of pixel rows and a plurality of pixel columns connected to the data lines and to the gate lines, and wherein the common electrode lines overlap the pixel rows or overlap the pixel columns.

9. A touch display device, comprising:

an In-Cell touch panel and a backlight module fixed to the In-Cell touch panel,

wherein the In-Cell touch panel comprises;

an array substrate;

a color filter substrate placed opposite to the array substrate;

a layer of liquid crystals disposed in between the substrates;

wherein the color filter substrate comprises a plurality of common electrode lines disposed on the surface facing the array substrate, configured to function as drive electrodes or sense electrodes;

wherein the array substrate comprises a display area and a periphery area, wherein a plurality of data lines and a plurality of gate lines are disposed in the display area on the array substrate surface facing the color filter substrate, wherein the gate lines are perpendicular to the data lines;

wherein a protect layer is formed directly on the plurality of data lines and an organic film layer is formed on the protect layer, and a pixel layer is formed on the organic film layer; and

an Integrated Circuit (IC) disposed on the 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 also configured to detect touch signals, and wherein a scanning period of the IC includes a touch period and a display period, wherein during the touch period, the IC provides the touch drive signals and detects the touch signals, and wherein the IC provides the display drive signals during the display period.

10. The touch display device according to claim 9, wherein the color filter substrate faces the backlight module and the array substrate faces a user.