JPH10133807A - Position indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to previously image dots or a graphics to be practically inputted by observing the pen tip part of a position indicator and to efficiently input graphics by forming the pen tip part of the position indicator capable of detecting an axial rotation angle into a semicircular disk shape. SOLUTION: Two ferrite cores and a semicircular disk shape-pen tip are included in the coordinate indication part of the position indicator and a pressure sensor for detecting pressure applied to the pen tip and a circuit board consisting of electronic parts such as an IC are arranged on the inside of the position indicator. In the constitution, a tablet side can detect a coordinate value indicated by the pen, pen pressure and an axial rotation angle to a tablet face. Since the pen tip is formed like a semicircular disk shape, an operator can previously and easily image the direction and pattern of a line, an ellipse or a rectangle plotted based on the axial rotation angle detected on the tablet side while observing the pen tip. Since the pen tip part can be substituted, a dot shape can be previously imaged by observing the pen tip part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position indicator used in a position detecting device utilizing electromagnetic induction between a tablet and a position indicator, and more particularly to a pen-shaped position capable of detecting a rotation angle with respect to a pen axis. Regarding the indicator.

[0002]

Prior to this application, in Japanese Patent Application No. 6-165495 (hereinafter referred to as "the prior application") of the joint invention of Yuji Katsurahei and Yasuhiro Fukusaki, the angle of rotation about the pen axis is described. There has been proposed a position detecting device and an electronic pen that can detect the position of the pen. The electronic pen of the prior application can detect the axis rotation angle (the rotation angle about the pen axis with respect to the tablet surface), but the electronic pen capable of detecting the axis rotation angle has an asymmetrical tip especially in the field of computer graphics. This is effective when a writing instrument having a portion is electronically realized, and the direction in which an asymmetric dot is drawn can be specified by the axis rotation angle.

[0003]

When a graphic or the like is input using an electronic pen capable of detecting the rotation angle of the shaft, the shape of the dot is determined by software running on a computer. However, since the appearance of the electronic pen shown in the prior application is not different from that of a normal electronic pen (which cannot detect the rotation of the axis), there is a problem that it is difficult for the operator to image dots or figures that are actually input. Was.

An object of the present invention is to provide a position indicator capable of detecting a shaft rotation angle, which can easily image dots and figures actually input corresponding to application software, and efficiently perform figure input. The purpose is to provide what can be.

[0005]

According to the present invention, in order to achieve the above object, a pen-shaped position indicator used in a position detecting device, and at least two magnetic cores are provided so that a tablet and a tablet can be used. A position indicator which detects a rotation angle about a pen axis by utilizing an electromagnetic induction action between the position indicators, wherein a pen point portion is formed in a flat shape. Suggest.

[0006] Further, there is proposed a position pointing device characterized in that the pen tip portion has a semi-circular shape.

A pen-shaped position indicator used in a position detecting device, and at least two magnetic cores are provided, so that a pen shaft is utilized by utilizing an electromagnetic induction action between the tablet and the position indicator. The present invention proposes a position indicator that detects a rotation angle around a center point, in which a pen tip portion is replaceable.

[0008]

According to the present invention, the pen tip of the position indicator capable of detecting the rotation angle of the shaft is made flat or the pen tip is replaceable, so that it is actually input in correspondence with the application software. The shape of the dot can be imaged in advance by looking at the pen tip.

[0009]

FIG. 1 shows a first embodiment of a position indicator according to the present invention. The coordinate indicator of the position indicator has two ferrite cores and a semi-circular pen tip. Is provided with a pressure sensor for detecting the pressure applied to the pen tip, a circuit board including electronic components such as an IC, and the like. With these configurations, the tablet can detect the axis rotation angle with respect to the tablet surface along with the coordinate value and the pen pressure indicated by the pen.

The feature of this embodiment is that the pen tip has a semi-circular shape, so that the operator can preliminarily determine the direction or pattern of a line, ellipse, rectangle, etc. to be drawn based on the axis rotation angle detected on the tablet side. This means that you can easily image while looking at the pen tip. FIG. 2 shows an example of a figure displayed on computer graphics when a curve is input on a tablet using the pen of the present embodiment. The figure shows the relationship between the axis rotation angle of the pen and the moving direction of the pen. The operation of drawing while changing the thickness of the line can be extremely easily performed while looking at the pen tip.

FIG. 3 shows a coil portion of the present embodiment, wherein 301 and 302 are ferrite cores, 303 is a first coil wound only on the ferrite core 301, and both ends are opened or short-circuited by a switch 304. Can control.

Reference numeral 305 denotes a second coil which is wound by bundling two ferrite cores, and 306 denotes a capacitor which is a resonance circuit 3 which resonates with the frequency of the radio wave from the tablet.
07. The signal generated in the resonance circuit 307 is connected to an electronic circuit for detecting a control signal from the tablet and detecting pen pressure.

A capacitor 309 is connected to the resonance circuit 307 via a switch 308. Switch 308
Is controlled to open and close in conjunction with the switch 304.

When a control signal for controlling these switches is not applied, the first coil 303 is in an open state, and a coordinate value corresponding to the center position of the two ferrite cores is detected on the tablet side. Further, when a control signal is applied, the first coil 303 is in a short-circuit state, and it is difficult for magnetic flux to pass through the ferrite core 301.
On the tablet side, a coordinate value corresponding to the ferrite core 302 is detected. On the tablet side, the coordinate rotation of these two points is detected alternately to determine the axis rotation angle of the position indicator.

Although the inductance of the second coil 305 is reduced by short-circuiting the first coil 303, a capacitor 309 is connected via a switch 308 to compensate for this reduction.

FIG. 4 shows a second embodiment of the position indicator of the present invention, in which a pen point portion of the position indicator can be removed.

FIG. 5 shows an example of a detachable pen tip portion. By changing the pattern of dots to be drawn according to the shape of the pen tip, the operator can easily image the pattern to be drawn while looking at the pen tip in advance.

[0018]

According to the present invention, the pen tip portion of the position indicator capable of detecting the rotation angle of the shaft is formed in a flat shape, so that dots or figures actually inputted corresponding to the application software can be displayed. By looking at the portion, the image can be preliminarily imaged, and the graphic input can be performed efficiently.

According to the present invention, the pen tip portion of the position indicator capable of detecting the shaft rotation angle can be exchanged, so that the pen tip having a shape easy to imagine dots actually input corresponding to application software. Since the parts can be exchanged, the dots and figures to be actually input can be imaged in advance by looking at the pen tip part, and the figure can be input efficiently.

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[Procedure amendment]

[Submission date] January 16, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a cutaway view showing the internal structure of a position indicator according to a first embodiment.

FIG. 2 is a diagram illustrating an example of a graphic displayed on computer graphics when a curve is input on a tablet using the position indicator according to the first embodiment.

FIG. 3 is a diagram showing a coil portion according to the first embodiment;

FIG. 4 is a cross-sectional view illustrating a structure of a position indicator according to a second embodiment.

FIG. 5 is a diagram showing an example of a removable pen tip portion.

[Description of Signs] 301, 302 Ferrite core 303 First coil 304, 308 Switch 305 Second coil 306, 309 Capacitor 307 Resonant circuit

Continued on the front page (72) Inventor Takenori Kaneda 2-510-1, Toyonodai, Otone-cho, Kita-Saitama-gun, Saitama

Claims (3)

[Claims] 1. A pen-shaped position indicator used in a position detecting device, wherein at least two magnetic cores are provided, so that a pen shaft is used by utilizing an electromagnetic induction action between the tablet and the position indicator. A position indicator for detecting a rotation angle centered on a pen, wherein a pen tip portion is formed in a flat shape. 2. The position pointing device according to claim 1, wherein the pen tip portion has a semi-circular shape. 3. A pen-shaped position indicator used in a position detecting device, wherein at least two magnetic cores are provided so that a pen shaft can be used by utilizing an electromagnetic induction effect between the tablet and the position indicator. A position indicator for detecting a rotation angle around a pen, wherein a pen tip portion is replaceable.