TOUCH DISPLAY DEVICE

• US 20150103274A1
• Filed: 10/15/2014
• Published: 04/16/2015
• Est. Priority Date: 10/15/2013
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Ye Xin Technology Consulting Co Ltd
• Inventors: LIU, CHIA-LIN, HUANG, HUNG-YUN, CHEN, WEI-CHENG
• Granted Patent: US 9,513,734 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• 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 3/0412 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
• 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

A touch display device includes a first substrate, a second substrate, a number of first sensing electrodes formed on the first substrate, a number of second sensing electrodes formed on the second substrate, a touch integrated circuit set on the first substrate, and a number of connecting wires formed on the first substrate. The touch integrated circuit includes a number of first pins correspondingly connected to the first sensing electrodes and a number of second pins correspondingly connected to the second sensing electrodes. The connecting wires correspondingly connect two opposite terminals of the first sensing electrodes with two opposite ends of the first pins. A part of connectint wires are arranged between the first pins and the second pins. The first substrate includes a shielding sheet formed in the first substrate and located above the part of the connecting wires arranged between the first pins and the second pins.

Claims

1. A touch display device comprising:

a first substrate;

a second substrate;

a plurality of first sensing electrodes formed on the first substrate;

a plurality of second sensing electrodes formed on the second substrate;

a touch integrated circuit set on the first substrate comprising a plurality of first pins correspondingly connected to the first sensing electrodes and a plurality of second pins correspondingly connected to the second sensing electrodes; and

a plurality of connecting wires formed on the first substrate and configured to correspondingly connect two opposite terminals of the first sensing electrodes with two opposite ends of the first pins;

wherein at least some of the connecting wires are arranged between the first pins and the second pins, the first substrate comprises a shielding sheet formed in the first substrate, and the shielding sheet is located above the part of the connecting wires arranged between the first pins and the second pins, thereby reducing any capacity coupling generated between the connecting wires and the second pins.

2. The touch display device of claim 1, wherein the part of the connecting wires arranged between the first pins and the second pins comprises a first portion located in a projection of the touch integrated circuit and a second portion located out of a projection of the touch integrated circuit.

3. The touch display device of claim 2, wherein the shielding sheet covers both of the first portion and the second portion.

4. The touch display device of claim 2, wherein the shielding sheet covers the first portion.

5. The touch display device of claim 1, wherein the shielding sheet is made of conductive material.

6. The touch display device of claim 5, wherein the shielding sheet is made of indium tin oxide.

7. The touch display device of claim 5, wherein the shielding sheet is made of conductive metal.

8. The touch display device of claim 1, wherein the shielding sheet is grounded.

9. The touch display device of claim 1, wherein the shielding sheet is appled with a constant voltage.

10. The touch display device of claim 1, further comprising a connecting circuit, wherein the connecting circuit correspondingly connects the second sensing electrodes with the second pins of the touch integrated circuit.

11. The touch display device of claim 1, the connecting circuit is a flexible printed circuit.

12. The touch display device of claim 1, wherein the touch display device defines a display area and a non-display area encircling the display area.

13. The touch display device of claim 12, wherein the first sensing electrodes and the second sensing electrodes are located in the display area, and the touch integrated circuit and the connecting wires are located in the non-display area.

14. The touch display device of claim 1, wherein the first substrate comprises a base, a first insulating layer, a second insulating layer, and a third insulating layer, the first insulating layer is formed on the base, the connecting wires are formed on the first insulating layer, the second insulating layer is formed on the first insulating layer to cover the connecting wires, the shielding sheet is formed on the second insulating layer, and the third insulating layer is formed on the second insulating layer to cover the shielding sheet.

15. The touch display device of claim 14, wherein the touch integrated circuit is connected on the third insulating layer, two ends of each first pin are correspondingly aligned with the connecting wires, the first substrate defines a plurality of connecting through holes passing through the second insulating layer and the third insulating layer, the connecting through holes are corresponding to the two ends of each first pins, the first substrate further comprises a plurality of connecting lines formed in each of the connecting through holes, and the connecting lines connect the connecting wires with the first pins.

16. The touch display device of claim 14, wherein the first substrate further comprises a plurality of gate lines formed on the first insulating layer and a plurality of data lines formed on the second insulating layer, the gate lines and the data lines are located in the display area, the gate lines are formed at the same time with the connecting wires by patterning a first conductive metal, and the data lines are formed at the same time with the shielding sheet by patterning a second conductive metal.