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Position detecting device

A detection device and a technology of a detection unit, which are applied in the direction of instruments, electrical digital data processing, and input/output processes of data processing, etc., can solve problems such as detection accuracy reduction, and achieve the effect of suppressing detection accuracy reduction

Active Publication Date: 2009-07-01
WACOM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the area of ​​the detection electrode is reduced, the capacitance generated between the human body (finger) and the detection electrode is also reduced, so there is a disadvantage that the detection accuracy of the capacitive detection unit decreases.

Method used

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Embodiment Construction

[0028] Below, refer to Figure 1 to Figure 11 Embodiments of the position detection device of the present invention will be described. However, the same reference numerals are attached to the same components in each figure. In addition, the present invention is not limited to the following aspects.

[0029] First, according to figure 1 A brief configuration of a position detection device to which the present invention is applied will be described. as it should figure 1 As shown, the position detection device 1 as an embodiment of the present invention (hereinafter referred to as "this example") is connected to an external device (not shown), such as a personal computer and a PDA (Personal Digital Assistant), via a cable 10 . In this way, the position detection device 1 functions as an input device of the external device. In addition, although not illustrated and described in particular, this position detection device 1 may be incorporated in a personal computer or the l...

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PUM

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Abstract

A position detecting device includes a position indicator (2), a first detection section (13) (e.g., an electrostatic capacity type detection section) having a substantially flat shape, and a second detection section (14) (e.g., an electromagnetic induction type detection section). The position indicator (2) has a coil (27). The first detection section (13) has, on one surface thereof, detection electrodes (15) for detecting a capacitance between itself and a human body part. The second detection section (14) is provided with loop coils (24) for detecting a magnetic flux G. Further, each of the detection electrodes (15) has a substantially flat shape, and is provided with at least one slit (19) extending from the outer edge to the inside. With such a configuration, not only can degradation of detection accuracy of the first detection section be prevented or suppressed, but also degradation of detection accuracy of the second detection section can be prevented or suppressed.

Description

technical field [0001] The present invention relates to a position detection device which overlaps a capacitive detection unit and an electromagnetic induction detection unit to detect a coordinate position indicated by a position indicator or a human body (finger). Background technique [0002] Conventionally, a position detection device has been used as a device for inputting a position in an information processing device such as a personal computer device. In this position detection device, for example, a pen-shaped position indicator or an input unit composed of a human body (finger) is used to perform pointing operations or to input input information such as characters and figures. [0003] An input method using a position indicator as an input unit includes, for example, an electromagnetic induction method. In this electromagnetic induction method, a resonant circuit is provided on the position indicator, and the resonant circuit resonates with electromagnetic waves o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044G06F3/046
CPCG06F3/046G06F3/03545G06F2203/04111G06F3/044G06F3/0446G06F3/0448
Inventor 松原正树
Owner WACOM CO LTD
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