IN-CELL TOUCH DISPLAY STRUCTURE

• US 20150085208A1
• Filed: 10/22/2014
• Published: 03/26/2015
• Est. Priority Date: 09/24/2013
• Status: Active Grant

• Current Assignee: Superc-Touch Corporation
• Original Assignee: Superc-Touch Corporation
• Inventors: LEE, Hsiang-Yu
• Granted Patent: US 9,436,336 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• 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

Abstract

An in-cell touch display structure includes: upper and lower substrates, a display material layer configured between the upper and lower substrates, and a thin film transistor and sensing electrode layer including a gate line sub-layer and a source line sub-layer. The gate line sub-layer includes plural gate lines arranged in a first direction, and plural first sensing conductor segments arranged in a second direction, The first sensing conductor segments are separated by the gate lines. The source line sub-layer includes plural source lines arranged in the second direction, plural second sensing conductor segments arranged in the first direction, and plural connection traces arranged in the second direction and parallel to the source lines. The second sensing conductor segments are separated by the source lines and the connection traces. The first sensing conductor segments are electrically connected to the second sensing conductor segments for forming a plurality sensing conductor blocks.

Claims

1. An in-cell touch display structure, comprising:

an upper substrate;

a lower substrate parallel to the upper substrate;

a display material layer configured between the upper substrate and the lower substrate; and

a thin film transistor and sensing electrode layer disposed at one side of the lower substrate facing display material layer, wherein the thin film transistor and sensing electrode layer includes;

a gate line sub-layer having a plurality of gate lines arranged in a first direction, and a plurality of first sensing conductor segments arranged in a second direction, the plurality of first sensing conductor segments being separated by the plurality of gate lines; and

a source line sub-layer disposed at one side of the gate line sub-layer facing the display material layer and having a plurality of source lines arranged in the second direction, a plurality of second sensing conductor segments arranged in the first direction, and a plurality of connection traces arranged in the second direction and parallel to the plurality of source lines, the plurality of second sensing conductor segments being separated by the plurality of source lines and the plurality of connection traces,

wherein the plurality of first sensing conductor segments are electrically connected to the plurality of second sensing conductor segments for forming a plurality of sensing conductor blocks.

2. The in-cell touch display structure as claimed in claim 1, wherein the plurality of connection traces are connected to the plurality of sensing conductor blocks, respectively, for transmitting electric signal sensed by each of the plurality sensing conductor blocks.

3. The in-cell touch display structure as claimed in claim 2, wherein the plurality of second sensing conductor segments and the plurality of first sensing conductor segments are disposed at positions corresponding to those of the plurality of gate lines, the plurality of source lines, and the plurality of connection traces.

4. The in-cell touch display structure as claimed in claim 3, wherein the plurality of second sensing conductor segments, the plurality of first sensing conductor segments, and the plurality of connection traces are made of conductive metal material or alloy thereof.

5. The in-cell touch display structures as claimed in claim 4, wherein the conductive metal material is selectively to be chromium, barium, aluminum, silver, copper, titanium, nickel, tantalum, tungsten, magnesium, calcium, potassium, lithium, indium, and alloy thereof, mixture of lithium fluoride, magnesium fluoride, oxide and aluminum.

6. The in-cell touch display structures as claimed in claim 5, wherein each of the plurality sensing conductor block is a mesh-like polygon region.

7. The in-cell touch display structures as claimed in claim 6, wherein each of the plurality of first sensing conductor segments includes two ends respectively having a first extension part and a second extension part arranged in the first direction, and each of the plurality of second sensing conductor segments includes two ends respectively having a first extension part and a second extension part arranged in the second direction, the first extension part and the second extension part arranged in the first direction and the first extension part and the second extension part arranged in the second direction being partially overlapped.

8. The in-cell touch display structures as claimed in claim 7, wherein the first extension part and the second extension part arranged in the first direction and the first extension part and the second extension part arranged in the second direction are partially overlapped for being electrically connected, and the plurality of second sensing conductor segments and the plurality of first sensing conductor segments are provided to form the plurality of sensing conductor blocks of the thin film transistor and sensing electrode layer.

9. The in-cell touch display structure as claimed in claim 8, further comprising:

a control circuit connected to the plurality of sensing conductor blocks, so that, in sensing, the control circuit provides a touch driving signals for detecting whether there is an external object approached through the plurality of connection traces and the plurality of sensing conductor blocks.

10. The in-cell touch display structure as claimed in claim 1, wherein the display material layer is a liquid crystal layer

11. The in-cell touch display structure as claimed in claim 10, further comprising:

a black matrix layer arranged on one side of the upper substrate facing the display material layer, the black matrix layer being composed of a plurality of opaque lines;

a color filter layer arranged on one side of the black matrix layer facing the display material layer;

a common electrode layer disposed between the upper substrate and the lower substrate;

an upper polarizer layer arranged on one side the upper substrate opposite to the other side of the upper substrate facing the display material layer; and

a lower polarizer layer arranged on one side of the lower substrate opposite to the other side of the lower substrate facing the display material layer,

wherein the plurality of opaque lines of the black matrix layer are disposed at positions corresponding to those of the plurality of gate lines and the plurality of source lines.

12. The in-cell touch display structures as claimed in claim 1, wherein the display material layer is an OLED layer.

13. The in-cell touch display structures as claimed in claim 12, further comprising:

a cathode layer arranged on one side the upper substrate facing the display material layer, the cathode layer being formed of conductive metal material; and

an anode layer arranged on one side the thin film transistor and sensing electrode layer facing the display material layer.

14. The in-cell touch display structures as claimed in claim 13, wherein the material display layer is a white emitting layer.

15. The in-cell touch display structures as claimed in claim 13, wherein the display material includes a red emitting layer, a blue emitting layer, and a green emitting layer.

16. The in-cell touch display structures as claimed in claim 13, further comprising:

a black matrix layer arranged on one side of the upper substrate facing the display material layer, the black matrix layer being composed of a plurality of opaque lines; and

a color filter layer disposed on one side of the black matrix layer facing the display material layer,

wherein the plurality of opaque lines of the black matrix layer are disposed at positions corresponding to those of the plurality of gate lines and the plurality of source lines.

17. The in-cell touch display structures as claimed in claim 9, wherein the first direction is vertical to the second direction.