Image display device including a touch switch

• US 10,642,425 B2
• Filed: 07/08/2016
• Issued: 05/05/2020
• Est. Priority Date: 07/10/2015
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Matsui, Kuniaki
• Primary Examiner(s): Mistry, Ram A
• Application Number:
  US15/205,226
• Publication Number:
  US 20170010718A1
• Time in Patent Office: 1,397 Days
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

An image display device comprising a capacitive touch switch that performs switching by detecting a finger based on a change in capacitance that is caused when the finger comes close to a panel, wherein the touch switch comprises the panel, a substrate on which an electrode for detecting capacitance is mounted, and a conductive member corresponding to the electrode, and the conductive member is provided between the panel and the electrode, and is fixed by being interposed between the panel and the electrode.

Claims

1. An image display device comprising a capacitive touch switch that performs switching by detecting a finger based on a change in capacitance that is caused when the finger comes close to a panel,

wherein the touch switch comprises the panel, a substrate directly on which an electrode for detecting capacitance is mounted, the electrode being mounted on a side of the substrate that faces the panel, and a conductive member corresponding to the electrode,

wherein the conductive member is provided between the panel and the electrode, and is fixed by being deformed in a predetermined direction under pressure from the panel and the electrode regardless of the finger coming close to or touching the panel, and

wherein the conductive member electrically connects the panel and the electrode.

2. The image display device according to claim 1, further comprising a capacitance detection sheet,

wherein the panel has an area greater than the capacitance detection sheet, and the touch switch is disposed on a region of the panel other than a region of the capacitance detection sheet.

3. The image display device according to claim 2,

wherein two or more of the electrodes are mounted directly on the substrate, and the touch switch comprises conductive members corresponding to the electrodes, and

wherein each one of the conductive members is provided between the panel and the corresponding one of the electrodes with a predetermined gap to another of the conductive members.

4. The image display device according to claim 1,

wherein two or more of the electrodes are mounted directly on the substrate, and the touch switch comprises conductive members corresponding to the electrodes, and

wherein each one of the conductive members is provided between the panel and the corresponding one of the electrodes with a predetermined gap to another of the conductive members.

5. The image display device according to claim 4,

wherein each one of the conductive members is disposed on the substrate along a direction in such a manner that another of the conductive members is not positioned in a direction in which the each one of the conductive members become deformed under pressure from the panel and the corresponding one of the electrodes.

6. The image display device according to claim 1,

wherein the conductive member is formed by having a conductive sheet wound around a predetermined surface of an elastic body having a cuboid, columnar or semicircular column shape, or a shape combining the shapes, and the elastic body includes at least one of urethane foam, rubber and resin, and is fixed between the panel and the electrode under pressure from the panel and the electrode.