DETECTION APPARATUS AND TOUCH DETECTION FUNCTION-EQUIPPED DISPLAY APPARATUS

• US 20180039356A1
• Filed: 07/28/2017
• Published: 02/08/2018
• Est. Priority Date: 08/05/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kurasawa, Hayato, Teranishi, Yasuyuki, Mizuhashi, Hiroshi, Koito, Takeo, Hayashi, Shuji
• Granted Patent: US 10,296,150 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/041662 using alternate mutual and self-capacitive scanning
• 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
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A detection apparatus includes a first electrode, a second electrode provided at a position that does not overlap with the first electrode, a third electrode arranged facing the first electrode and the second electrode via a spacing, and a detector configured to apply a drive signal to the first electrode and detect an output signal appearing in the second electrode.

Claims

1. A detection apparatus comprising:

at least one first electrode;

at least one second electrode provided at a position that does not overlap with the at least one first electrode;

a third electrode arranged facing the at least one first electrode and the at least one second electrode via a spacing; and

a detector configured to apply a drive signal to the at least one first electrode and detect an output signal appearing in the at least one second electrode.

2. The detection apparatus according to claim 1, wherein

the at least one first electrode and the at least one second electrode are provided extending in one direction on a first plane within a certain area, and

the third electrode is provided crossing the at least one first electrode and the at least one second electrode on a second plane parallel to the first plane.

3. The detection apparatus according to claim 1, wherein at least either the at least one first electrode or the at least one second electrode comprises a plurality of electrodes.

4. The detection apparatus according to claim 3, wherein the at least one second electrode comprising n (n is a natural number) second electrode(s) is arranged by the side of the at least one first electrode consisting of one first electrode.

5. The detection apparatus according to claim 4, wherein

a first capacitance element comprising the at least one first electrode and the third electrode and a second capacitance element comprising the at least one second electrode and the third electrode are coupled to each other in series to form a combined capacitance element, and

the at least one second electrode forms the combined capacitance element together with the at least one first electrode consisting of one first electrode.

6. The detection apparatus according to claim 4, wherein

a first capacitance element comprising the at least one first electrode and the third electrode and a second capacitance element comprising the at least one second electrode and the third electrode are coupled to each other in series to form a combined capacitance element, and

the at least one second electrode forms the combined capacitance element together with the at least one first electrode comprising a plurality of first electrodes.

7. A touch detection function-equipped display apparatus comprising a touch detection function-equipped display device comprising drive electrodes comprising a plurality of electrode patterns extending in one direction to give common potential to pixel electrodes arranged in a matrix, within a display area and detection electrodes comprising electrode patterns extending in a direction crossing the extension direction of the electrode patterns of the drive electrodes to detect a touch position within the display area, the touch detection function-equipped display device configured to detect a position of a touch operation within the display area using the drive electrodes and the detection electrodes, the touch detection function-equipped display apparatus comprising a detection apparatus comprising:

at least one first electrode;

at least one second electrode provided at a position that does not overlap with the at least one first electrode;

a third electrode arranged facing the at least one first electrode and the at least one second electrode via a spacing; and

a detector configured to apply a drive signal to the at least one first electrode and detect an output signal appearing in the at least one second electrode,

either the drive electrodes and the detection electrodes configured to function as the at least one first electrode and the at least one second electrode, and

the detection apparatus configured to calculate a force applied to the touch detection function-equipped display device at a detection position of the touch operation in accordance with a change in the output signal.

8. The touch detection function-equipped display apparatus according to claim 7, wherein

the at least one first electrode and the at least one second electrode are provided extending in one direction on a first plane within a certain area, and

the third electrode is provided crossing the at least one first electrode and the at least one second electrode on a second plane parallel to the first plane.

9. The touch detection function-equipped display apparatus according to claim 7, wherein at least either the at least one first electrode or the at least one second electrode comprises a plurality of electrodes.

10. The touch detection function-equipped display apparatus according to claim 9, wherein the at least one second electrode comprising n (n is a natural number) second electrode(s) is arranged by the side of the at least one first electrode consisting of one first electrode.

11. The touch detection function-equipped display apparatus according to claim 10, wherein

a first capacitance element comprising the at least one first electrode and the third electrode and a second capacitance element comprising the at least one second electrode and the third electrode are coupled to each other in series to form a combined capacitance element, and

the at least one second electrode forms the combined capacitance element together with the at least one first electrode consisting of one first electrode.

12. The touch detection function-equipped display apparatus according to claim 10, wherein

a first capacitance element comprising the at least one first electrode and the third electrode and a second capacitance element comprising the at least one second electrode and the third electrode are coupled to each other in series to form a combined capacitance element, and

the at least one second electrode forms the combined capacitance element together with the at least one first electrode comprising a plurality of first electrodes.

13. The touch detection function-equipped display apparatus according to claim 7, wherein

the touch detection function-equipped display device comprises the detection electrodes, the drive electrodes, and the third electrode in this order from an image display face side,

the drive electrodes are configured to function as the at least one first electrode and the at least one second electrode, and

the third electrode is provided on a face of a backlight apparatus provided apart from the touch detection function-equipped display device via a gap, the face being opposite to an image display face side.

14. The touch detection function-equipped display apparatus according to claim 7, wherein

the touch detection function-equipped display device comprises the detection electrodes, the third electrode, and the drive electrodes in this order from an image display face side,

the drive electrodes are configured to function as the at least one first electrode and the at least one second electrode, and

the third electrode is provided apart from the drive electrodes via a liquid crystal layer.

15. The touch detection function-equipped display apparatus according to claim 14, wherein the third electrode is provided overlapping with the detection electrodes in a direction perpendicular to the image display face.

16. The touch detection function-equipped display apparatus according to claim 14, wherein the third electrode is provided along a light shielding area that separates pixel areas provided for each of the pixel electrodes.

17. The touch detection function-equipped display apparatus according to claim 7, wherein

the touch detection function-equipped display device comprises the third electrode, the detection electrodes, and the drive electrodes in this order from an image display face side,

the detection electrodes are configured to function as the at least one first electrode and the at least one second electrode, and

the third electrode is provided apart from the detection electrodes via a gap.

18. The touch detection function-equipped display apparatus according to claim 17, wherein the gap is an air layer.

19. The touch detection function-equipped display apparatus according to claim 17, wherein the third electrode is provided on a cover glass that covers an image display face.

20. The touch detection function-equipped display apparatus according to claim 19, wherein the third electrode is formed of a conductive material having translucency.