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Indicator position detecting device

一种检测装置、指示体的技术，应用在仪器、电数字数据处理、数据处理的输入/输出过程等方向，能够解决降低信号电平、指示位置检测灵敏度或者精度降低、缩短供给时间等问题

Active Publication Date: 2014-02-12
WACOM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the signal level of the transmission signal supplied to the loop coil is reduced or the supply time is shortened, sufficient power cannot be supplied to the pen type position indicator, so the sensitivity or accuracy for pointing position detection decreases.

Method used

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  • Indicator position detecting device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ］

[0063] Figure 4 It is a diagram for explaining the configuration of main parts of the pointer position detection device 200A according to the first embodiment of the present invention. and, in Figure 4 In FIG. 2 , a portion constituted by the sensor unit 20A and the selection circuit 261 in the pointer position detection device 200A is shown. The sensor section 20A is with the figure 1 The portion corresponding to the sensor unit 20 of the pointer position detection device 200 is shown.

[0064] In addition, in Figure 4 In FIG. 2 , only the transmission and reception switching circuit 264 , the current driver 263 , and the reception amplifier 265 constituting the position detection circuit 26 are shown in order to show the relationship with the selection circuit 261 . In addition, in Figure 4 In the figure, for the sake of simplicity of description, three loop coil portions located at both end regions in the X-axis direction within the X-axis direction loop coil group...

no. 2 approach ］

[0079] Figure 5 It is a diagram for explaining the configuration of main parts of a pointer position detection device 200B according to the second embodiment of the present invention. And, with the use of Figure 4 Similarly to the case of the first embodiment described, Figure 5 Also shown is a part constituted by the sensor unit 20B and the selection circuit 261 in the pointer position detection device 200B. The sensor section 20B is with figure 1 The part corresponding to the sensor part 20 of the pointer position detection device 200 shown is used Figure 4 In the same manner as in the case of the first embodiment described, the loop coil group 21 in the X-axis direction shows part of both end sides, and the loop coil group 22 in the Y-axis direction is not shown.

[0080] as compared Figure 5 and Figure 4 It can be seen that in Figure 5 In the pointer position detection device 200B of the second embodiment shown, a switch FX composed of, for example, an FET (Fie...

no. 3 approach ］

[0098] Figure 7 It is a diagram for explaining the configuration of main parts of a pointer position detection device 200C according to the third embodiment of the present invention. And, with the use of Figure 4 Similarly to the case of the first embodiment described, Figure 7 Also shown is a part constituted by the sensor unit 20C and the selection circuit 261 in the pointer position detection device 200C. The sensor section 20C is with figure 1 The part corresponding to the sensor part 20 of the pointer position detection device 200 shown is used Figure 4 In the same manner as in the case of the first embodiment described, the loop coil group 21 in the X-axis direction shows part of both end sides, and the loop coil group 22 in the Y-axis direction is not shown.

[0099] And, as compared to Figure 7 and Figure 5 It can be seen that the pointer position detection device 200C of the third embodiment has the same configuration as the pointer position detection devi...

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PUM

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Abstract

Disclosed herein is an indicator position detecting device that reduces unwanted radiation from a sensor section, while being capable of robustly charging a pen-type position indicator with the sensor section, without requiring reduction in area size of a display region and a detecting region of the sensor section even when the overall device size is reduced. The sensor section has an X-axis direction loop coil group and a Y-axis direction loop coil group disposed in intersecting directions. When a transmission signal is supplied to loop coils of at least one of the X-axis direction loop coil group and the Y-axis direction loop coil group, a control circuit controls a selecting circuit so as not to supply the transmission signal to a determined number of loop coils disposed in at least one peripheral region of the sensor section.

Description

technical field [0001] The present invention relates to a pointing body position detection device having an electromagnetic induction type pointing position detection sensor, and particularly relates to control of a loop coil formed as the pointing position detection sensor. Background technique [0002] In recent years, electromagnetic induction type position input devices have been used as input devices such as tablet PCs (personal computers). This position input device is composed of a pen-shaped position indicator (pen-type position indicator) and a pointing body position detection device. The input face of the input. A pen-type position indicator has a resonant circuit consisting of a coil and a capacitor. On the other hand, the indicator position detection device has a loop coil group in the X-axis direction in which a plurality of loop coils are arranged in the horizontal direction (X-axis direction) and a plurality of loop coils in the vertical direction (Y-axis di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/0354
CPCG06F3/041G06F3/03545G06F3/046G06F3/041661G06F3/033
Inventor 杉山义久
Owner WACOM CO LTD