Integrated electromagnetic and capacitive touch substrate, touch panel, and touch display panel

• US 9,535,558 B2
• Filed: 03/11/2015
• Issued: 01/03/2017
• Est. Priority Date: 10/30/2014
• 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: Lu, Feng, Yao, Qijun, Zhang, Xianxiang
• Primary Examiner(s): Cheng, Joe H
• Application Number:
  US14/645,412
• Publication Number:
  US 20160124562A1
• Time in Patent Office: 664 Days
• US Class Current: 1/1
• 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

Abstract

An embodiment discloses an integrated electromagnetic and capacitive touch substrate, and a touch display panel. The touch substrate includes: a substrate; and a plurality of driving electrodes, a plurality of sensing electrodes, and a plurality of first coils, arranged on the substrate in the same layer, wherein the plurality of driving electrodes and sensing electrodes are arranged alternately in a first direction; and the plurality of first coils are arranged in the first direction, and each of the first coils surrounds at least one of the driving electrodes and/or the sensing electrodes.

Claims

1. An integrated electromagnetic and capacitive touch substrate, comprising:

a substrate; and

a plurality of driving electrodes, a plurality of sensing electrodes, and a plurality of first coils, arranged on the substrate in a same layer;

wherein the plurality of driving electrodes and the plurality of sensing electrodes are arranged alternately in a first direction; and

the plurality of first coils are arranged in the first direction, and each of the first coils surrounds at least one of the plurality of driving electrodes and/or the plurality of sensing electrodes.

2. The integrated electromagnetic and capacitive touch substrate according to claim 1, wherein each of the plurality of driving electrodes comprises a plurality of sub-driving electrodes arranged in a second direction;

and each of the plurality of sensing electrodes is a strip-shaped electrode extending in the second direction, or each of the plurality of sensing electrodes comprises a plurality of sub-inductive coils arranged in the second direction.

3. The integrated electromagnetic and capacitive touch substrate according to claim 1, wherein each of the plurality of sensing electrodes comprises a plurality of sub-inductive coils arranged in a second direction, wherein wirings of the sub-inductive coils in a sensing electrode extend out from a same side or opposite sides of the sensing electrode.

4. The integrated electromagnetic and capacitive touch substrate according to claim 3, wherein two adjacent sub-inductive coils in the sensing electrode comprise a common wiring.

5. The integrated electromagnetic and capacitive touch substrate according to claim 1, wherein the plurality of driving electrodes and the plurality of sensing electrodes are arranged spaced in the first direction at equal intervals.

6. The integrated electromagnetic and capacitive touch substrate according to claim 1, wherein each of the plurality of sensing electrodes comprises a first inductive coil having first terminals, and a second inductive coil having second terminals arranged opposite to the first terminals, and the first inductive coil and the second inductive coil each are bent into a plurality of sub-inductive coils so that the sub-inductive coils of the first inductive coil and the sub-inductive coils of the second inductive coil are nested alternately into each other.

7. The integrated electromagnetic and capacitive touch substrate according to claim 6, wherein areas of the sub-inductive coils of the first inductive coil are decremented toward the first terminals of the first inductive coil, and areas of the plurality of sub-inductive coils of the second inductive coil are decremented toward the second terminals of the second inductive coil;

or the areas of the sub-inductive coils of the first inductive coil are incremented toward the first terminals of the first inductive coil, and the areas of the plurality of sub-inductive coils of the second inductive coil are incremented toward the second terminals of the second inductive coil.

8. The integrated electromagnetic and capacitive touch substrate according to claim 1, wherein each of the plurality of first coils is a U-shaped coil;

and for capacitive touch detection, the plurality of first coils are grounded or floating, and for electromagnetic touch detection, the plurality of first coils are induced by an external electromagnetic signal to generate an inductive signal.

9. A touch panel, comprising the integrated electromagnetic and capacitive touch substrate according to claim 1, a first driving detection circuit, and a second driving detection circuit, wherein:

for a capacitive touch, the first driving detection circuit applies a capacitive driving signal to the plurality of driving electrodes and detects a capacitive sensing signal from the plurality of sensing electrodes, and the plurality of first coils are grounded or floating; and

for an electromagnetic touch, the second driving detection circuit applies an electromagnetic driving signal to the plurality of first coils and detects an electromagnetic inductive signal from the plurality of first coils to determine a coordinate in the first direction.

10. The touch panel according to claim 9, wherein each of the plurality of driving electrodes comprises a plurality of sub-driving electrodes arranged in a second direction;

and each of the plurality of sensing electrodes is a strip-shaped electrode extending in the second direction, or each of the plurality of sensing electrodes comprises a plurality of sub-inductive coils arranged in the second direction.

11. The touch panel according to claim 9, wherein each of the plurality of sensing electrodes comprises a plurality of sub-inductive coils arranged in a second direction, wherein wirings of the sub-inductive coils in a sensing electrode extend out from a same side or opposite sides of the sensing electrode.

12. The touch panel according to claim 11, wherein two adjacent sub-inductive coils in the sensing electrode comprise a common wiring.

13. The touch panel according to claim 9, wherein the plurality of driving electrodes and the plurality of sensing electrodes are arranged spaced in the first direction at equal intervals.

14. The touch panel according to claim 9, wherein each of the plurality of sensing electrodes comprises a first inductive coil having first terminals, and a second inductive coil having second terminals arranged opposite to the first terminals, and the first inductive coil and the second inductive coil each are bent into a plurality of sub-inductive coils so that the sub-inductive coils of the first inductive coil and the sub-inductive coils of the second inductive coil are nested alternately into each other.

15. The touch panel according to claim 14, wherein areas of the sub-inductive coils of the first inductive coil are decremented toward the first terminals of the first inductive coil, and areas of the plurality of sub-inductive coils of the second inductive coil are decremented toward the second terminals of the second inductive coil;

or the areas of the sub-inductive coils of the first inductive coil are incremented toward the first terminals of the first inductive coil, and the areas of the plurality of sub-inductive coils of the second inductive coil are incremented toward the second terminals of the second inductive coil.

16. The touch panel according to claim 9, wherein each of the plurality of first coils is a U-shaped coil;

and for capacitive touch detection, the plurality of first coils are grounded or floating, and for electromagnetic touch detection, the plurality of first coils are induced by an external electromagnetic signal to generate an inductive signal.

17. A touch display panel, comprising the integrated electromagnetic and capacitive touch substrate according to claim 1.

18. The touch display panel according to claim 17, further comprising:

an array of pixels arranged on or above the integrated electromagnetic and capacitive touch substrate;

an opposite substrate arranged opposite to the integrated electromagnetic and capacitive touch substrate, wherein the plurality of driving electrodes, the plurality of sensing electrodes, and the plurality of first coils are arranged on a side of the integrated electromagnetic and capacitive touch substrate facing the opposite substrate.

19. The touch display panel according to claim 17, further comprising an array substrate arranged opposite to the integrated electromagnetic and capacitive touch substrate.

20. The touch display panel according to claim 19, wherein the plurality of driving electrodes, the plurality of sensing electrodes, and the plurality of first coils on or above the integrated electromagnetic and capacitive touch substrate are arranged on a side of the integrated electromagnetic and capacitive touch substrate facing or away from the array substrate.