Touch panel and touch screen display device

• US 9,933,902 B2
• Filed: 08/28/2015
• Issued: 04/03/2018
• Est. Priority Date: 05/08/2015
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Wu, Tianyi
• Primary Examiner(s): Pappas, Claire X
• Assistant Examiner(s): Oliver, Gerald
• Application Number:
  US14/839,882
• Publication Number:
  US 20160328055A1
• Time in Patent Office: 949 Days
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

A touch panel and a touch screen display device are provided. The touch panel includes: a base plate including a display area and a border area; and a capacitive touch structure and an electromagnetic touch structure that are provided on a same side of the base plate; where the electromagnetic touch structure includes multiple first coils each extending in a first direction and multiple second coils each extending in a second direction; every two adjacent coils of the multiple first coils partly overlap each other; every two adjacent coils of the multiple second coils partly overlap each other; and the first direction is perpendicular to the second direction. The touch panel includes a capacitive touch structure for capacitive touch detection and an electromagnetic touch structure for electromagnetic touch detection, and thus may achieve both capacitive touch detection and electromagnetic touch detection.

Claims

1. A touch panel, comprising:

a base plate, the base plate comprising a display area and a border area, wherein the border area is provided with an electromagnetic touch detecting circuit for electromagnetic touch scanning, and the electromagnetic touch detecting circuit comprises a first circuit and a second circuit; and

a capacitive touch structure and an electromagnetic touch structure that are provided on a same side of the base plate;

wherein the electromagnetic touch structure comprises a plurality of first coils each extending in a first direction and a plurality of second coils each extending in a second direction, wherein the first direction is perpendicular to the second direction;

wherein the first coils are arranged in adjacent pairs that partly overlap each other;

wherein the second coils are arranged in adjacent pairs that partly overlap each other;

wherein each of the first coils comprises two first sides each extending in the first direction and one second side extending in the second direction, first ends of the two first sides are connected to each other through the second side, and second ends of the two first sides are connected to the first circuit; and

wherein each of the second coils comprises two third sides each extending in the second direction and one fourth side extending in the first direction, first ends of the two third sides are connected to each other through the fourth side, and second ends of the two third sides are connected to the second circuit.

2. The touch panel according to claim 1, wherein the capacitive touch structure comprises:

a common electrode layer and a wiring layer;

wherein

the common electrode layer comprises a plurality of touch electrodes;

the wiring layer comprises a plurality of wires each extending in the second direction; and

the plurality of wires are connected to the plurality of touch electrodes according to a one-to-one correspondence.

3. The touch panel according to claim 2, wherein

the display area is provided with a plurality of gate lines that are parallel to each other and a plurality of data lines that are parallel to each other, wherein each of the plurality of gate lines extends in the first direction and each of the plurality of data lines extends in the second direction;

and

the border area is provided with a capacitive touch detecting circuit for capacitive touch scanning.

4. The touch panel according to claim 3, wherein the first sides and the fourth sides are provided in a same layer as the plurality of gate lines.

5. The touch panel according to claim 4, wherein

the second sides and the third sides are provided in a same layer as the wires;

the first sides and the second side of each of the first coils are connected through first via holes; and

the third sides and the fourth side of each of the second coils are connected through second via holes.

6. The touch panel according to claim 3, wherein a plurality of pixel unit regions are defined by intersections of the gate lines and data lines which are insulated from each other, and each of the plurality of pixel unit regions is provided with one pixel electrode.

7. The touch panel according to claim 6, wherein

the pixel electrodes are arranged in a same layer as the wires;

and

the touch electrodes are provided between the pixel electrodes and the base plate.

8. The touch panel according to claim 6, wherein

the wires are provided between the touch electrodes and the base plate;

and

the touch electrodes are provided between the wires and the pixel electrodes.

9. The touch panel according to claim 6, wherein

the pixel electrodes are arranged in a same layer as the wires;

and

the wires are provided between the touch electrodes and the base plate.

10. The touch panel according to claim 1, wherein projections of the second sides and projections of the fourth sides onto the base plate in a direction vertical to the base plate are within the border area.

11. A touch screen display device, comprising:

a first substrate and a second substrate that are provided oppositely; and

a liquid crystal layer provided between the first substrate and the second substrate;

wherein

the first substrate comprises;

a base plate, the base plate comprising a display area and a border area, wherein the border area is provided with an electromagnetic touch detecting circuit for electromagnetic touch scanning, and the electromagnetic touch detecting circuit comprises a first circuit and a second circuit; and

a capacitive touch structure and an electromagnetic touch structure that are provided on a same side of the base plate;

wherein the electromagnetic touch structure comprises a plurality of first coils each extending in a first direction and a plurality of second coils each extending in a second direction, wherein the first direction is perpendicular to the second direction;

wherein the first coils are arranged in adjacent pairs that partly overlap each other;

wherein the second coils are arranged in adjacent pairs that partly overlap each other;

wherein each of the first coils comprises two first sides each extending in the first direction and one second side extending in the second direction, first ends of the two first sides are connected to each other through the second side, and second ends of the two first sides are connected to the first circuit; and

wherein each of the second coils comprises two third sides each extending in the second direction and one fourth side extending in the first direction, first ends of the two third sides are connected to each other through the fourth side, and second ends of the two third sides are connected to the second circuit.