JPH07114437A - Pen inputting device - Google Patents

Abstract

PURPOSE:To extend the available service time of a built-in battery by providing a piezoelectric conversion means to a pen point so as to convert a pressure exerted to the pen point into an electricity for each pen input thereby charging the built-in battery. CONSTITUTION:The pen inputting device uses a cordless pens incorporating a battery. In the case of the input by the pen inputting device, a pen point is pressed onto a face, then it is regarded that a specific event takes place. Thereby, a pressure is exerted to the pen point at use time. The pen point is provided with a piezoelectric conversion means sensing the pressure and converting it into an electric power. In this embodiment, a semiconductor pressure sensor of a piezoelectric circuit converts a pressure into an electric current. The current is inputted to a charging circuit section, in which the power is converted into a voltage so as to charge the power to a chargeable battery of the pen. The built-in battery is charged for each pen input to charge the built-in battery more frequently by a person using the pen inputting device more thereby reducing trouble of battery replacement.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention can be used in devices such as a pen computer using a pen as an input method, a pen input TV, and the like, in which a battery is built in the pen.

[0002]

2. Description of the Related Art As a pen input method, a resistance film method, a capacitance method, an electromagnetic induction method, an electromagnetic transfer method (wacom),
An ultrasonic method or the like is used. Among these, for the type in which the pen is on the output side, a power supply line is inserted into the cord to supply the voltage, but a battery is built in to supply the voltage to the pen. As an example, an electromagnetic induction type cordless pen with a built-in battery will be described. 4 is a structural diagram of the cordless pen with a built-in battery, FIG. 5 is a block diagram showing the operation of the cordless pen with a built-in battery, and FIG. 6 is a configuration diagram of the entire electromagnetic induction system. As shown in FIG. 5, a current is passed through the coil part of the pen by the electric power generated from the battery part,
Output in a specific frequency band. Next, as shown in FIG. 6, a current is caused to flow through the sensor unit that is coiled by a signal output from the pen unit by electromagnetic induction, and the current value is converted into XY coordinates by the pen sensing unit. The built-in battery of this pen is a disposable type.

At this time, in addition to the coordinate values, it is possible to sense information such as the height of the pen, the inclination, the writing pressure, and the remaining amount of the battery (there are methods by frequency fluctuation and current strength).

[0004]

In the prior art, the pen input method in which the battery is built in the pen has a problem that the life of the built-in battery is short. Replacement is required early. As a cause of this, it is conceivable that a battery was built in the pen to make the pen input cordless.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a pen input device using a cordless pen having a built-in battery, the pen has piezoelectric conversion means at its pen tip. An input device is provided, which electrically converts the pressure applied to the pen tip each time the pen is input and charges the built-in battery.

[0006]

As described above, by charging the built-in battery each time the pen is input, the more frequently used users can charge the built-in battery more frequently, and the labor of battery replacement is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings, taking an electromagnetic induction type cordless pen with a built-in rechargeable battery (hereinafter referred to as a pen input device) as an example.

FIG. 1 is a structural diagram of a pen input device according to one embodiment of the present invention, FIG. 2 is a block diagram of a pen input device according to one embodiment of the present invention, and FIG. 3 is a pen input device according to one embodiment of the present invention. FIG.

Normally, when inputting with a pen input device, it is considered that a specific event has occurred by pressing the pen tip against the surface (directly pointing at coordinates,
Select a menu). Therefore, pressure is applied to the pen tip during use. This pressure is detected and the power (current, current,
The pen tip is provided with a piezoelectric conversion means for converting the voltage into a voltage. Here, the pressure is converted into current by the semiconductor pressure sensor in the piezoelectric circuit. This current is input to the charging circuit section. The charging circuit section converts the electric power into a voltage so that the rechargeable battery of the pen can be charged.

The output of information such as coordinates from the pen input device is basically performed in the same manner as in the prior art. As shown in FIG. 2, a current is caused to flow in the coil portion of the pen by the electric power generated in the rechargeable battery portion, and output is performed in a specific frequency band. Then, as shown in FIG. 3, the sensor unit that is coiled by the signal output from the pen input device causes a current to flow by electromagnetic induction, and the current value is converted into XY coordinates by the pen sensing unit. At this time, in addition to the coordinate values, the height of the pen, tilt, writing pressure,
It is also possible to sense information such as charging and remaining battery level (there is a method of sensing by frequency fluctuation and current strength).

[0011]

According to the present invention, it is possible to provide a pen input device which is easy for the user to use because the labor for battery replacement is reduced.

[Brief description of drawings]

FIG. 1 is a structural diagram of a pen input device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an operation of the pen input device according to the embodiment of the present invention.

FIG. 3 is an overall configuration diagram of a pen input device according to an embodiment of the present invention.

FIG. 4 is a structural diagram of a conventional cordless pen with a built-in battery.

FIG. 5 is a block diagram showing an operation of a conventional cordless pen with a built-in battery.

FIG. 6 is a configuration diagram of an entire conventional electromagnetic induction system.

Claims (1)

[Claims] 1. A pen input device using a cordless pen having a built-in battery, wherein the pen has a piezoelectric conversion means at the pen tip, and the pressure applied to the pen tip is electrically converted every time the pen is input. Then, the pen input device is characterized in that the built-in battery is charged.