Vibrating device and tactile sense presenting device

• US 10,365,718 B2
• Filed: 12/02/2016
• Issued: 07/30/2019
• Est. Priority Date: 06/09/2014
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Hashimoto, Junichi
• Primary Examiner(s): Mandeville, Jason M
• Application Number:
  US15/367,891
• Publication Number:
  US 20170083099A1
• Time in Patent Office: 970 Days
• Field of Search: 345173
• CPC Class Codes: B06B 1/0688 with foil-type piezoelectric elements, e.g. PVDF
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: H10N 30/10513 characterised by the underlying bases, e.g. substrates
• CPC Class Codes: H10N 30/88 Mounts; Supports; Enclosures; Casings

Abstract

A tactile feedback device includes a vibrating device and a touch sensor. The vibrating device comprises a flexible diaphragm and a film which deforms in response to the application of electrical energy thereto, the film being attached to the flexible diaphragm at two spaced locations with a major surface of the film facing a major surface of the flexible diaphragm. The vibrating device further includes a spacer located between the two spaced locations and ensuring that the major surface of the flexible diaphragm is spaced from the major surface of the film. The touch sensor is coupled to the diaphragm and generates an output signal in response to a touch operation. Means are provided to apply electrical energy to the film in response to the output signal.

Claims

1. A vibrating device, comprising:

a flexible diaphragm;

a touch panel located on the flexible diaphragm;

a film which deforms in response to the application of electrical energy thereto, the film being rigidly attached to the flexible diaphragm at two spaced locations with a major surface of the film facing a major surface of the flexible diaphragm; and

a spacer located between the two spaced locations and ensuring that the major surface of the flexible diaphragm is spaced from the major surface of the film, the spacer including a base and a plurality of projections protruding from the base in the direction of the flexible diaphragm.

2. The vibrating device in accordance with claim 1, wherein the vibrating device has a length, a width and a thickness, the flexible diaphragm and the film are spaced apart in the thickness direction and the flexible diaphragm is flexible in the thickness direction.

3. The vibrating device in accordance with claim 1, wherein the flexible diaphragm deforms in response to deformation of the film when electrical energy is applied to the film.

4. The vibrating device in accordance with claim 1, wherein the diaphragm vibrates in response to vibration of the film when an alternating electric voltage is applied to the film.

5. The vibrating device according to claim 1, wherein the spacer contacts both the flexible diaphragm and the film both before electrical energy is applied to the film and while electrical energy is applied to the film.

6. The vibrating device according to claim 1, wherein the base portion has a top surface and a bottom surface, the plurality of projections extend from the too surface of the base toward the flexible diaphragm and the bottom surface of the base faces the film.

7. The vibrating device according to claim 6, wherein the base is in contact with the film and the plurality of protrusions are in contact with the flexible diaphragm.

8. The vibrating device according to claim 6, wherein the vibrating device has a length, a width and a thickness extending perpendicular to one another and the spacer is elongated and extends in a length direction of the vibrating device.

9. The vibrating device according to claim 8, wherein the plurality of projections extend in the thickness direction of the vibrating device.

10. The vibrating device according to claim 8, wherein a plurality of the spacers are aligned in the length direction of the vibrating device.

11. The vibrating device according to claim 1, wherein the flexible diaphragm has a flat shape when electrical energy is not applied to the film.

12. The vibrating device according to claim 1, wherein the film comprises a chiral polymer film or a polyvinylidene fluoride film.

13. The vibrating device according to claim 1, further comprising a circuit for applying a drive voltage to the film in response to a detection of a touch operation on the touch panel, the drive voltage causing the film to vibrate.

14. The vibrating device according to claim 1, wherein the flexible diaphragm is curved when it is in non-stressed state.

15. The vibrating device according to claim 1, wherein the spacer divides the flexible diaphragm into two flat planar sections.

16. A tactile feedback device comprising:

(a) a vibrating device including;

(i) a flexible diaphragm;

(ii) a film which deforms in response to the application of electrical energy thereto, the film being rigidly attached to the flexible diaphragm at two spaced locations with a major surface of the film facing a major surface of the flexible diaphragm; and

(iii) a spacer located between the two spaced locations and ensuring that the major surface of the flexible diaphragm is spaced from the major surface of the film;

the spacer including a base and a plurality of projections protruding from the base in the direction of the diaphragm;

(b) a touch sensor coupled to the diaphragm and generating an output signal in response to a touch operation; and

(c) means for applying electrical energy to the film in response to the output signal.

17. The tactile feedback device in accordance with claim 16, wherein the vibrating device has a length, a width and a thickness, the flexible diaphragm and the film are spaced apart in the thickness direction and the flexible diaphragm is flexible in the thickness direction.

18. The tactile feedback device in accordance with claim 16, wherein the flexible diaphragm deforms in response to deformation of the film when electrical energy is applied to the film.

19. The tactile feedback device in accordance with claim 16, wherein the flexible diaphragm, and with it the touch sensor, vibrates in response to vibration of the film when an alternating electric voltage is applied to the film.

20. The tactile feedback device according to claim 16, wherein the spacer contacts both the flexible diaphragm and the film both before electrical energy is applied to the film and while it is applied to the film.

21. The tactile feedback device according to claim 16, wherein the base portion has a bottom surface and a top surface, the plurality of projections extend from the top surface of the base toward the flexible diaphragm and the bottom surface of the base faces the film.

22. The tactile feedback device according to claim 21, wherein the base is in contact with the film and the plurality of protrusions are in contact with the flexible diaphragm.

23. The tactile feedback device according to claim 21, wherein the vibrating device has a length, a width and a thickness extending perpendicular to one another and the spacer is elongated and extends in length direction of the vibrating device.

24. The tactile feedback device according to claim 16, further comprising a touch panel located on the flexible diaphragm.

25. The tactile feedback device according to claim 24, further comprising a circuit for applying a drive voltage to the film in response to a detection of a touch operation on the touch panel, the drive voltage causing the film to vibrate.

26. The tactile feedback device according to claim 16, wherein the flexible diaphragm is curved when it is in non-stressed state.

27. The tactile feedback device according to claim 16, wherein the spacer divides the flexible diaphragm into two flat planar sections.