Vibration system

Patent metadata

Field	Value
Publication number	US-10866641-B2
Application number	US-201816133734-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Sep 28, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A vibration system includes a linear vibration motor, and a controller that controls a drive current waveform of the vibration motor. The drive current waveform includes consecutively arranged large unit waves having the same waveforms side by side on a time axis. Each large unit wave includes a first region having a waveform with a smaller amplitude in one period, which is a width of the large unit wave on the time axis, and a second region having a waveform with a larger amplitude than the amplitude in the first region. The first region and the second region alternatively appear on the time axis.

First claim

What is claimed is:

1. A vibration system comprising:
a linear vibration motor; and
a controller that controls a drive current waveform of the vibration motor; wherein
the drive current waveform includes consecutively arranged large unit waves having same waveforms side by side on a time axis;
the large unit wave includes a first region having a waveform with a smaller amplitude in one period, which is a width of the large unit wave on the time axis, and a second region having a waveform with a larger amplitude than the amplitude in the first region;
the first region and the second region alternatively appear on the time axis;
a time axis width of the second region is smaller than a time axis width of the first region; and
vibrations of the linear vibration motor corresponding to the drive current waveform in the second region provide an ascending tactile feeling to a user of the vibration system.

2. The vibration system according to claim 1 , wherein at least one of the first region and the second region includes waveforms that are different in frequency and are adjacent on the time axis.

3. The vibration system according to claim 1 , wherein, in one period of the large unit wave of the drive current waveform, the first region of a first time axis width, the second region, the first region of a second time axis width smaller than the first time axis width, and the second region, sequentially appear on the time axis.

4. The vibration system according to claim 1 , wherein the first region includes a plurality of regions with different waveform amplitudes.

5. The vibration system according to claim 4 , wherein the first region includes the plurality of regions in which a waveform amplitude increases as the region appears rearward on the time axis.

6. The vibration system according to claim 1 , wherein the second region has a waveform with a frequency that is a resonance frequency of the vibration motor.

7. An operation device comprising:
the vibration system according to claim 1 .

8. The operation device according to claim 7 , wherein the controller shortens one period of the large unit wave as a movement speed of a contact position by an operation tool increases.

9. A touch pen comprising:
the vibration motor of the vibration system according to claim 1 .

10. The touch pen according to claim 9 , wherein the controller shortens one period of the large unit wave as a movement speed of a contact position by the touch pen increases.

11. A cap unit which is attachable to and detachable from a pen unit, comprising:
the vibration motor of the vibration system according to claim 1 .

12. The cap unit according to claim 11 , wherein the controller shortens one period of the large unit wave as a movement speed of a contact position by the pen unit increases.

13. A touch operation device comprising:
a touch panel; and
the vibration system according to claim 1 ; wherein
a vibration target of a vibration motor of the vibration system is the touch panel.

14. The touch operation device according to claim 13 , wherein the controller shortens one period of the large unit wave as a movement speed of a contact position by an operation tool increases.

Assignees

• Nidec Corp
• Nidec Seimitsu Corp

Inventors

• Hayashi Tetsufumi

Classifications

• G06F3/04883

  for inputting data by handwriting, e.g. gesture or text · CPC title

• G06F3/03547

  Touch pads, in which fingers can move on a surface · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/03545

  Pens or stylus · CPC title

• G06F3/016 Primary

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