Tactile presentation panel, tactile presentation touch panel, tactile presentation touch display, and tactile presentation knob

Patent metadata

Field	Value
Publication number	US-2022374084-A1
Application number	US-201917773617-A
Country	US
Kind code	A1
Filing date	Dec 5, 2019
Priority date	Dec 5, 2019
Publication date	Nov 24, 2022
Grant date	—

Abstract

A tactile presentation panel according to the present invention includes a tactile presentation voltage generation circuit that generates a voltage signal having a first frequency to be applied to at least one first electrode located in at least a partial region on an operation surface of the tactile presentation panel, and generates a voltage signal having a second frequency different from the first frequency to be applied to at least one second electrode located in at least a partial region on the operation surface of the tactile presentation panel, a charge discharge portion that is connected to the tactile electrode and discharges charges accumulated in a conductive elastic portion, and a touch detection circuit that detects contact of the user with a tactile presentation knob.

First claim

1 . A tactile presentation panel in which a tactile presentation knob having a plurality of conductive elastic portions is placed on an operation surface, the tactile presentation panel presenting a tactile sense to a user via the tactile presentation knob, the tactile presentation panel comprising:
a tactile electrode including a plurality of first electrodes and a plurality of second electrodes provided on the operation surface side of the tactile presentation panel; a dielectric layer covering the tactile electrode and having one surface as the operation surface; a voltage generation circuit that generates a voltage signal having a first frequency to be applied to at least one of the first electrodes located in at least a partial region on the operation surface of the tactile presentation panel, and generates a voltage signal having a second frequency different from the first frequency to be applied to at least one of the second electrodes located in at least a partial region on the operation surface of the tactile presentation panel; a charge discharge portion that is connected to the tactile electrode; and a contact detection unit that detects contact of the user with the tactile presentation knob, wherein the first electrode and the voltage generation circuit are connected, and the second electrode and the charge discharge portion are connected while the user is in contact with the tactile presentation knob, the first electrode connected to the voltage generation circuit and at least part of the conductive elastic portions face each other with the dielectric layer therebetween, and the second electrode connected to the charge discharge portion and at least part of the conductive elastic portions which does not face the first electrode face each other with the dielectric layer therebetween.

2 . The tactile presentation panel according to claim 1 , wherein the charge discharge portion is a GND terminal.

3 . The tactile presentation panel according to claim 1 , further comprising a switching unit that is provided between the voltage generation circuit and the charge discharge portion and switches connection between the tactile electrode and the voltage generation circuit or the charge discharge portion.

4 . (canceled)

5 . The tactile presentation panel according to claim 1 , wherein the contact detection unit detects that the tactile presentation knob is placed on the operation surface of the tactile presentation panel.

6 . The tactile presentation panel according to claim 1 , wherein the contact detection unit detects a position of the tactile presentation knob on the operation surface of the tactile presentation panel by using a position detection unit included in the tactile presentation knob.

7 . The tactile presentation panel according to claim 3 , wherein the switching unit connects at least the first electrode and the second electrode adjacent to each other among the first electrodes and the second electrodes overlapping the tactile presentation knob in plan view and the voltage generation circuit, and connects at least one of the first electrode and the second electrode to the charge discharge portion.

8 . The tactile presentation panel according to claim 6 , wherein the contact detection unit calculates a rotation angle of the tactile presentation knob by using the position detection unit.

9 . The tactile presentation panel according to claim 1 , wherein
generation of the voltage signal by the voltage generation circuit and the detection by the contact detection unit are performed in a time division manner, and the contact detection unit detects capacitance formed between the tactile presentation knob and a detection electrode provided on a side opposite to the tactile presentation knob of the tactile electrode.

10 . The tactile presentation panel according to claim 1 , wherein one of the first electrodes and one of the second electrodes are arranged as a pair in a matrix.

11 . A tactile presentation touch panel comprising:
the tactile presentation panel according to claim 1 ; and a touch panel arranged on a side opposite to the operation surface of the tactile presentation panel, wherein the contact detection unit is included in the touch panel instead of the tactile presentation panel.

12 . The tactile presentation touch panel according to claim 11 , wherein a detection electrode and an excitation electrode of the touch panel are arranged as a pair in a matrix.

13 . A tactile presentation touch display comprising:
the tactile presentation touch panel according to claim 11 ; and a display panel attached to the tactile presentation touch panel.

14 . A tactile presentation knob being the tactile presentation knob that is placed on the operation surface of the tactile presentation panel according to claim 1 and presents a tactile sense to a user,
wherein each of the conductive elastic portions is provided at a position facing the operation surface.

15 . The tactile presentation knob according to claim 14 , further comprising:
a position detection unit used when the contact detection unit of the tactile presentation panel detects a position of the tactile presentation knob on the operation surface of the tactile presentation panel; and a fixing portion that fixes the tactile presentation knob to the operation surface and serves as a central axis for rotating the tactile presentation knob.

16 . The tactile presentation knob according to claim 14 , wherein each of the conductive elastic portions is divided into a plurality of portions on a same plane, and overlaps at least the first electrode and the second electrode adjacent to each other in plan view.

17 . The tactile presentation knob according to claim 14 , wherein
the tactile presentation knob has a circular shape in plan view, and an outer diameter of each of the conductive elastic portions of the tactile presentation knob is larger than a pitch of each of the first electrodes or each of the second electrodes.

18 . The tactile presentation knob according to claim 15 , wherein each of the conductive elastic portions and the position detection unit are electrically connected to a side surface of the tactile presentation knob, and are grounded via the user when the user is in contact with the tactile presentation knob.

19 . The tactile presentation knob according to claim 15 , wherein the conductive elastic portions have a larger area than the position detection unit in plan view, and are alternately provided with a space from the position detection unit.

Assignees

• Mitsubishi Electric Corp

Inventors

• Orita Tae
• Ono Takeshi
• Morioka Takayuki
• Sasaki Yuichi

Classifications

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title

• G06F3/016 Primary

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

• G06F3/0393

  Accessories for touch pads or touch screens, e.g. mechanical guides added to touch screens for drawing straight lines, hard keys overlaying touch screens or touch pads · CPC title

• G06F3/03547

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