JPS605395Y2 - information input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information input device, and more particularly to a wireless type Bentouch type information input device.

A Ben-touch type information input device is, for example, a tablet type input device, which is a device that allows a position signal representing desired information to be input to a computer, etc. by touching a detection pen to a predetermined location on the tablet. be.

Specifically, when the detection pen is brought into contact with the tablet, a scanning signal is applied to each of the X and Y electrode lines arranged in a matrix inside the tablet. Among the signals, the signal of the contact portion of the detection pen is detected by the signal detection pen, and based on this detection signal, a position signal is inputted to a predetermined information processing device as described above.

Here, the activation signal and the detection signal have conventionally been sent to the main body of the input device via a cable made up of a plurality of conductive wires installed in the detection pen.

On the other hand, in such conventional technology, since a cable is connected to the detection pen, operability is poor when inputting information, and it is difficult to operate erroneously, especially when inputting a large amount of information continuously or when you want to input information quickly. It has always had the disadvantage of being prone to

For this reason, wireless type touch input devices using electromagnetic waves or infrared rays have recently been developed.

However, many of these wireless devices constantly apply scanning signals to the tablet, resulting in relatively high power consumption and, therefore, problems in durability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless type information input device which improves the disadvantages of the conventional example, improves durability, and saves energy.

Therefore, the present invention includes an input device main body that has an information input panel surface such as a tablet or CRT display and a control circuit that drives and controls the input panel surface, and a signal detection section that detects a predetermined position signal from the input panel. and a signal detection and transmission means comprising a signal transmission section that converts the detected signal into an electromagnetic wave signal and transmits it, and a signal detection and transmission means that receives the electromagnetic wave transmitted from the signal detection and transmission means, converts it into position information, and transmits it. In the information input device, the signal detection section is provided with a start switch for an oscillation circuit forming a part of the signal transmission section. In addition, the signal receiving means is provided with a first demodulation circuit that extracts a position signal from the received electromagnetic wave and a second demodulation circuit that extracts a carrier wave sent together with the position signal, and the second demodulation circuit extracts a carrier wave sent together with the position signal. A configuration is adopted in which a waveform shaping circuit is provided to start and control the control circuit based on an output signal, thereby attempting to achieve the above object in a distant manner.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

First, FIG. 1 is a schematic block diagram showing a wireless type information input device according to the present invention.

In this figure, 1 indicates a signal detection and transmission means, and 2 indicates a tablet.

Further, 10 indicates a signal receiving means, and 20 indicates a control circuit.

The signal detection and transmission section 1 includes a detection pen 3 as a signal detection section and an amplifier circuit 4 connected in series to the detection pen 3.
, an oscillation circuit 6, a modulation circuit 7, a power amplification circuit 8, and an antenna 9, and a carrier wave oscillator 6 is connected in parallel to the modulation circuit 7 via a start switch 5. .

Among these, the tablet 2 has a plurality of X's arranged in a matrix like the conventional example described above.

A predetermined scanning signal is sequentially applied to each of the X and Y electrode lines from a drive section (not shown) controlled by the control circuit 20.

Furthermore, when the detection pen 3 comes into contact with the tablet 2, it is capacitively coupled to the tablet 2, thereby making it possible to detect the scanning signal at the contact area.

The signal detected by the detection pen 3 is amplified by the amplification circuit 4 and sent to the modulation circuit 7.

On the other hand, the activation switch 5 is configured to close when the detection pen 3 is brought into contact with the tablet 2 and open when the detection pen 3 is pulled away. The carrier wave output from the oscillation circuit 6 is sent to the modulation circuit 7 only while the tablet 2 is in contact with the tablet 2.

The carrier wave modulated based on the position signal sent from the amplifier circuit 4 is amplified to a predetermined level by the power amplifier circuit 8, and then oscillated externally from the antenna 9 as an electromagnetic wave. There is.

On the other hand, the input device main body includes, in addition to the tablet 2 described above, a signal receiving means 10 for receiving the starting signal and the detection signal sent from the signal detecting and transmitting means 1, and a starting signal output from the signal receiving means 10. and a control circuit 20 that applies a scanning signal to the tablet 2 based on the detection signal, specifies the contact position of the detection pen 3, and inputs the detected position signal to a computer (not shown).

The signal receiving means 10 includes an antenna 11 for receiving electromagnetic waves transmitted from the signal detecting and transmitting means 1, a high frequency amplifying circuit 12 for amplifying the received signal received by the antenna 11, and an output of the high frequency amplifying circuit 12. A first demodulation circuit 13 and a second demodulation circuit 14 are connected in parallel to each other.
and waveform shaping circuits 15 and 16 connected to the output sides of these demodulation circuits 13 and 14, respectively.

The output signals of these waveform shaping circuits 15 and 16 are sent to the control circuit 20.

The second demodulation circuit 14 has a function of demodulating the amplitude of the carrier wave itself to obtain a starting signal, and also has a function of demodulating the amplitude of the carrier wave itself to obtain a starting signal.
The demodulation circuit 13 has a function of demodulating only the modulated signal component to obtain a detection signal.

Further, the waveform shaping circuits 16 and 15 are respectively connected to the demodulation circuit 1.
It has a function of shaping the output signals of 4 and 13 and sending them to the control circuit 20.

Next, the overall operation of the above embodiment will be explained.

Now, when desired position information is input to a computer using the signal detection and transmission means 1, first the detection pen 3 at the tip is brought into contact with a predetermined position on the tablet 2.

At this time, the start switch 5 is closed by a mechanism not shown, and the oscillation circuit 6 generates a signal as shown in FIG.
A carrier wave that also serves as a start signal is sent to the modulation circuit 7.

The carrier wave sent to the modulation circuit 7 is amplified by the power amplification circuit 8 and then transmitted from the antenna 9.

This transmission signal is transmitted to the antenna 1 provided on the input device main body.
1, the signal is amplified by the high frequency amplifier circuit 12, and then sent to the second demodulation circuit 14 (at this time, the first demodulation circuit 13 does not function).

In this case, the second demodulation circuit 14 demodulates the amplitude as it is based on the output signal of the high frequency amplification circuit 12.
(see diagram in the figure), and is output to the waveform shaping circuit 16 as a starting signal.

This activation signal is shaped by the waveform shaping circuit 16 as shown in FIG. 2, and then sent to the control circuit 20.

This control circuit 20 outputs a scanning signal to the tablet 2 energized by the activation signal sent from the waveform shaping circuit 16,
This causes the tablet 2 to be scanned.

Here, when a scanning signal is applied to the area that the detection pen 3 is in contact with, since the detection pen 3 and the tablet 2 are capacitively coupled as described above, the detection pen 3 causes the second
As shown in Figure B of the figure, scanning signals of the X and Y coordinates are sequentially detected.

This detection signal is amplified by the amplifier circuit 4 and then sent to the modulation circuit 7.

The detection signal is modulated by the modulation circuit 7 as shown in FIG. 2C, further amplified by the power amplification circuit 8, and then transmitted from the antenna 9.

This modulated signal is immediately received by the antenna 11 in the same manner as described above, amplified by the high frequency amplification circuit 12, and then sent to the first demodulation circuit 13.

This first demodulation circuit 13 demodulates only the modulated signal component to obtain a detection signal, and transmits this detection signal to the waveform shaping circuit 1.
5 (see Figure F in Figure 2).

This detection signal is shaped by the waveform shaping circuit 15 as shown in Figure G of FIG. 2, and then sent to the control circuit 20.

Based on the detection signal sent from the waveform shaping circuit 15, the control circuit 20 specifies the position where the detection pen 3 is in contact, and at the same time transmits the position information to the computer as shown by P in FIG. send to

After the position information is input, when the detection pen 3 is removed from the tablet 2, the activation switch 5 is immediately opened, and the transmission of the carrier wave is stopped, and at the same time, the drive of the tablet 2 is stopped.

As described above, according to the above embodiment, since the signal from the signal detection and transmission means is transmitted by electromagnetic waves, there is no need to worry about codes as in the past, and therefore, it is not necessary to input a large amount of information continuously. Even when you want to input information quickly, you can input information quickly and reliably.

Furthermore, since the activation signal for starting scanning of the tablet and the detection signal are transmitted and received using one carrier wave, the entire device can be configured relatively easily.

It should be noted that although a touch-type tablet input device is shown in the above embodiment, the present invention is not limited to this in any way; for example, a CRT device equipped with a light pen may be used.

Further, for signal modulation, in addition to the negative modulation shown in the embodiment, positive modulation, frequency modulation, phase modulation, etc. may be used.

As described above, according to the present invention, tablet or C
An input device main body that has an information input panel such as an RT display and a control circuit that drives and controls the input panel, a signal detection section that detects a predetermined position signal from the input panel, and a signal detection section that transmits the detected signal to electromagnetic waves. a signal detection and transmission means comprising a signal transmission unit that converts the signal into a signal and transmits the signal; and a signal detection and transmission means that receives the electromagnetic waves transmitted from the signal detection and transmission means, converts the same into position information, and inputs the position information to a predetermined information processing device. In the information input device, the signal detection unit is provided with a start switch for an oscillation circuit forming a part of the signal transmission unit, and
The signal receiving means is provided with a first demodulation circuit for extracting a position signal from the received electromagnetic wave and a second demodulation circuit for extracting a carrier wave sent together with the position signal, and the output signal of the second demodulation circuit is Since it is equipped with a waveform shaping circuit that starts and controls the control circuit based on the above, it is possible not only to improve the operability, but also to drive and control the tablet described above only when necessary for inputting information. Overall, it is possible to provide an unprecedented and practical information input device in which the power consumption can be significantly reduced and the durability of the tablet can be significantly increased.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing a Ben-touch type information input device according to the present invention, and FIG. 2 is an explanatory diagram of the operation of the device shown in FIG. Figure B is a diagram showing a detection signal, Figure C is a diagram showing a modulation signal, Figure E is a diagram showing a starting signal for demodulation, and Figure E is a diagram showing a starting signal after waveform shaping. Figure F is a diagram showing the detection signal after demodulation, and Figure G is a diagram showing the detection signal after waveform shaping. DESCRIPTION OF SYMBOLS 1...Signal detection and transmission means, 2...Tablet as information input panel, 3...Signal detection unit, 5...Start switch, 6... ... Oscillator circuit, 10 ... Receiving means, 13 ... First demodulation circuit, 14 ... Second demodulation circuit, 16 ...
... Waveform shaping circuit, 20 ... Control circuit.

Claims (1)

[Scope of utility model registration request] An input device main body that has an information input panel surface such as a tablet or CRT display and is equipped with a control circuit that drives and controls the input panel surface, a signal detection section that detects a predetermined position signal from the input panel, and the detected signal. a signal detection and transmission means including a signal transmission section that converts the signal into an electromagnetic wave signal and transmits the signal, and receives the electromagnetic wave transmitted from the signal detection and transmission means, converts it into position information, and inputs it to a predetermined information processing device. In the information input device, the signal detecting section is provided with a start switch for an oscillation circuit forming a part of the signal transmitting section, and the signal receiving means In addition to a first demodulation circuit that extracts a position signal from the received electromagnetic wave, there is also a second demodulation circuit that extracts a carrier wave sent together with the position signal.
1. An information input device comprising a second demodulation circuit and a waveform shaping circuit for starting and controlling the control circuit based on the output signal of the second demodulation circuit.