Position detecting device

• US 8,390,272 B2
• Filed: 07/22/2010
• Issued: 03/05/2013
• Est. Priority Date: 09/21/2009
• Status: Active Grant

• Current Assignee: Wacom Co Limited (Wacom)
• Original Assignee: Wacom Co Limited (Wacom)
• Inventors: Yokota, Masaru, Munakata, Hiroshi
• Primary Examiner(s): Phan, Huy Q
• Assistant Examiner(s): Rhodes-Vivour, Temilade S
• Application Number:
  US12/841,893
• Publication Number:
  US 20110068776A1
• Time in Patent Office: 957 Days
• Field of Search: 324/207.11, 178/18, 341/15, 345/173, 349/12
• US Class Current: 324/207.11
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/046 by electromagnetic means

Abstract

A position detecting device is disclosed, which detects a position indicated by a human body. The position detecting device includes: a sensor substrate including a detection area, in which a plurality of detection electrodes are formed, and a wiring area, in which wiring led out from the detection electrodes is formed, and a case configured to house the sensor substrate. The sensor substrate further includes a conductor, which is connected to a fixed potential, provided at a position opposed to (facing) the wiring area.

Claims

1. A sensor substrate configured to allow detection of a pointed position based on a capacitance system, the sensor substrate comprising:

a detection area, in which a plurality of detection electrodes are arranged, and a wiring area, in which wiring led out from the detection electrodes is arranged, wherein one or more of the plurality of detection electrodes each includes one or more slits that extend from an outer edge of the detection electrode toward inside of the detection electrode; and

a conductor connected to a fixed potential and is arranged on one side of the sensor substrate, the conductor being configured and arranged to oppose the wiring area arranged on another side of the sensor substrate, wherein the conductor includes one or more slits that extend from an outer edge of the conductor toward inside of the conductor.

2. The sensor substrate according to claim 1, wherein

the fixed potential is a ground potential.

3. The sensor substrate according to claim 1, wherein the sensor substrate is a flexible substrate.

4. A position detecting device comprising:

a housing;

a sensor substrate configured to allow detection of a pointed position based on a capacitance system disposed in the housing; and

a magnetic flux detection substrate configured to allow detection of a position pointed to by a position indicator based on an electromagnetic induction system, the magnetic flux detection substrate being disposed in the housing to face the sensor substrate in the housing;

wherein, the sensor substrate includes a detection area, in which a plurality of detection electrodes are arranged, a wiring area, in which wiring led out from the detection electrodes is arranged, and a conductor connected to a fixed potential and is arranged on one side of the sensor substrate, the conductor being configured and arranged to oppose the wiring area arranged on another side of the sensor substrate,

wherein the conductor includes one or more slits that extend from an outer edge of the conductor toward inside of the conductor and one or more of the plurality of detection electrodes each includes one or more slits that extend from an outer edge of the detection electrode toward inside of the detection electrode.

5. The position detecting device according to claim 4, wherein the magnetic flux detection substrate is so disposed to face the sensor substrate in the housing that an entire surface of the sensor substrate functions as an effective area for the position indicator.