Response force generation device

Patent metadata

Field	Value
Publication number	US-10639674-B2
Application number	US-201816011851-A
Country	US
Kind code	B2
Filing date	Jun 19, 2018
Priority date	Aug 17, 2017
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A drive waveform setting unit sets a drive waveform of a drive signal, and a drive current is applied to a drive coil provided in a response force generation mechanism in accordance with the drive waveform. The drive waveform has a first drive section in which a signal intensity increases linearly and a second drive section including a peak. An increase rate of the signal intensity in the second drive section is lower than that in the first drive section. As a result, it is easy to follow the frequency characteristics of a driver circuit, and it is possible to increase a voltage to be applied to a drive coil.

First claim

What is claimed is:

1. A response force generation device comprising:
a response force generation mechanism which is attached to a member to be operated at least a part of which is configured as an operation unit and applies a response force to the member to be operated; and
a drive control unit configured to drive the response force generation mechanism,
wherein the response force generation mechanism has a movable portion and a magnetic drive unit configured to operate the movable portion,
the drive control unit sets a drive waveform for changing a signal intensity of a drive signal to be supplied to the magnetic drive unit, and
the drive waveform has a first drive section in which the signal intensity increases in accordance with a lapse of time at an increase rate and a second drive section including a peak of the signal intensity, and the second drive section includes a region in which an increase rate of the signal intensity with respect to time is lower than the increase rate of the first drive section.

2. The response force generation device according to claim 1 , wherein
the drive signal changes linearly in the first drive section.

3. The response force generation device according to claim 1 , wherein
a waveform of the drive signal is a rectangular wave in the second drive section.

4. The response force generation device according to claim 1 , wherein
the second drive section includes a region in which the signal intensity of the drive signal does not change.

5. The response force generation device according to claim 1 , wherein
the second drive section includes a region in which the intensity of the drive signal changes in a curve.

6. A response force generation device comprising:
a response force generation mechanism which is attached to a member to be operated at least a part of which is configured as an operation unit and applies a response force to the member to be operated; and
a drive control unit configured to drive the response force generation mechanism,
wherein the response force generation mechanism has a movable portion and a magnetic drive unit configured to operate the movable portion,
the drive control unit sets a drive waveform for changing a signal intensity of a drive signal to be supplied to the magnetic drive unit, and
the drive waveform has a first drive section in which the signal intensity increases in accordance with a lapse of time at an increase rate, a second drive section following the first drive section and including a peak of the signal intensity, and a third drive section preceding the first drive section, wherein the second drive section and the third drive section each includes a region in which an increase rate of the signal intensity with respect to time is lower than the increase rate of the first drive section.

7. The response force generation device according to claim 6 , wherein
the drive signal changes linearly in the first drive section and in the third drive section.

8. The response force generation device according to claim 6 , wherein
a waveform of the drive signal is a rectangular wave in the second drive section and in the third drive section.

9. The response force generation device according to claim 6 , wherein
the second drive section and the third drive section each includes a region in which the signal intensity of the drive signal does not change.

10. The response force generation device according to claim 6 , wherein
the second drive section and the third drive section each includes a region in which the intensity of the drive signal changes in a curve.

11. A response force generation device comprising:
a response force generation mechanism which is attached to a member to be operated at least a part of which is configured as an operation unit and applies a response force to the member to be operated; and
a drive control unit configured to drive the response force generation mechanism,
wherein the response force generation mechanism has a movable portion and a magnetic drive unit configured to operate the movable portion,
the drive control unit sets a drive waveform for changing a signal intensity of a drive signal to be supplied to the magnetic drive unit, and
the drive waveform has a first drive section in which the signal intensity increases in accordance with a lapse of time at an increase rate, a second drive section following the first drive section and including a peak of the signal intensity, and a third drive section preceding the first drive section, wherein the second drive section includes a region in which an increase rate of the signal intensity with respect to time is lower than the increase rate of the first drive section and the third drive section has the same shape as the second drive section.

12. The response force generation device according to claim 11 , wherein
the drive signal changes linearly in the first drive section.

13. The response force generation device according to claim 11 , wherein
a waveform of the drive signal is a rectangular wave in the second drive section and in the third drive section.

14. The response force generation device according to claim 11 , wherein
the second drive section and the third drive section each includes a region in which the signal intensity of the drive signal does not change.

15. The response force generation device according to claim 11 , wherein
the second drive section and the third drive section each includes a region in which the intensity of the drive signal changes in a curve.

Assignees

• Alpine Electronics Inc

Inventors

• Shirashima Hitoshi

Classifications

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H03K4/94

  having trapezoidal shape · CPC title

• B06B1/045 Primary

  using vibrating magnet, armature or coil system · CPC title

• G06F3/016

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title