JP2003108303A - Information processing system and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To identify respective locations where a plurality of users stand. SOLUTION: If a user stands on any of electrodes 3-1 to 3-4 and touches a screen 1, an induced voltage corresponding to a driving pulse is induced at wire electrodes 1Xi, 1Yj corresponding to the touched location, the induced voltage is detected with an X electrode detection part 11 and a Y electrode detection part 12, and the corresponding digital data are outputted to a data buffer/232C converter 37. The data buffer/232C converter 37, during a period when a control signal is on a high level, at the timing of rising edge of sampling pulse, samples the outputs of the X electrode detection part 11 and the Y electrode detection part 12. Specifically, because out-of-phase driving pulses are impressed to the electrodes 3-1 to 3-4, the timings of the sampling vary, which makes it possible to easily identify the locations of the electrodes where the user stands.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus and method, and in particular, utilizing an induced voltage from a human body,
The present invention relates to an information processing device and method capable of identifying the existence of a plurality of users.

[0002]

2. Description of the Related Art The present applicant has filed Japanese Patent Application No. 2001-14386.
As No. 8, a method of identifying the chair or the standing position of the user by utilizing the induced voltage from the user was previously proposed.

[0003]

However, in the above proposal, it was difficult to identify the chairs or the standing positions of a plurality of users.

The present invention has been made in view of such a situation, and identifies the chairs or standing positions of a plurality of users, respectively, and changes the display color of which user is the input. Is to be identified by.

[0005]

An information processing apparatus according to the present invention includes a plurality of generating means for generating an induced voltage, a plurality of generating means extending in the first direction and the second direction, and the induction generated by the generating means. Inducing means for inducing a voltage through the human body, first detecting means for detecting the coordinates at which the inducing means induces the induced voltage on the basis of the induced voltage induced by the inducing means, and a plurality of generating means And a second detecting means for detecting the one that has generated the induced voltage.

The generating means can generate an induced voltage at different timings in synchronization with a predetermined drive pulse.

Identification means may be further provided for identifying the induced voltage generated by the plurality of generation means.

The identifying means can identify the induced voltage generated by the plurality of generating means from its ID.

The second detecting means can detect the generating means which has generated the induced voltage from the discrimination result by the discriminating means.

Display control means may be further provided for controlling the display of the display screen based on the coordinates detected by the first detection means and the generation means detected by the second detection means.

The display control means can control the display color of the image displayed on the display screen in accordance with the generation means detected by the second detection means.

The information processing method of the present invention is generated by the generating step of generating an induced voltage from a plurality of generating members and the generating step from the guiding members extending in the first direction and the second direction. An induction step of inducing an induced voltage through a human body, and a first detection step of detecting coordinates at which the induced voltage is induced in the processing of the induction step based on the induced voltage induced by the processing of the induction step,
A second detecting step of detecting a member that has generated an induced voltage in the process of the generating step among the plurality of generating members.

In the information processing apparatus and method of the present invention, an induced voltage is generated, the generated induced voltage is induced through the human body, the coordinates at which the induced voltage is induced are detected, and the induced voltage is generated. Is detected.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration example of an information input / output system to which the present invention is applied.

The screen 1 is made of a translucent material (for example,
An image is projected from behind by the projector 6 using acrylic as a base material. The screen 1 has a group of linear electrodes which are insulated from each other and arranged in the X and Y directions (the linear electrodes 1X1 to 1Xi and the linear electrodes 1 in FIG. 2).
Y1 to 1Yj) are provided and contacted by the human body 4.

In the present invention, 64 linear electrodes Xi are arranged on the screen 1 at 1 cm intervals (i = 64), and 48 linear electrodes Yj are arranged at 1 cm intervals (j = 48).
They are arranged (the screen size is 64 × 48 cm), but of course, these are arbitrary values, and a value according to the fineness of the detection coordinates is used.

The electrodes 3-1 to 3-4 are arranged at positions where the human body 4 is detected. The human body 4 has electrodes 3-1 to 3-4.
Standing on either of the above, and touching the linear electrode group of the screen 1 with a finger or the like, the timing signal control unit 2 causes the electrode 3 to move.
The induced voltage corresponding to the transmission signal (driving pulse) transmitted to -1 to 3-4 is induced to the linear electrode group via the human body 4. This induced voltage is applied to the X electrode detector 11 and Y
The corresponding digital data detected by the electrode detector 12 is supplied to the timing signal controller 2 via the signal line 22.

The timing signal control unit 2 includes a screen 1
The XY coordinates on the screen 1 where the induced voltage is generated are calculated (detected) based on the digital data corresponding to the induced voltage supplied from the signal line 22 from the position where the user stands (electrode 3- Any one of 1 to 3-4) is detected and the detection data is supplied to the personal computer 5.

The timing signal control section 2 generates a driving pulse and applies it to the electrodes 3-1 to 3-4, respectively, and also generates a sampling pulse in synchronization with the driving pulse and supplies it to the screen 1 through the signal line 23. . The timing signal control unit 2 further generates a control signal in the detection mode or the transfer mode, and the screen 1 via the signal line 24.
Supply to.

The personal computer 5 accepts an input or generates a predetermined image based on the detection data supplied from the timing signal controller 2.
The projector 6 is controlled to project on the screen 1.

The X electrode detection section 11 includes a linear electrode group (linear electrodes 1X in FIG. 2 arranged so as to extend in the X direction.
1 to 1Xi) induced voltage is detected, and corresponding digital data is detected via the signal line 21 and the Y electrode detection unit 12.
It is supplied to the timing signal controller 2.

The Y electrode detector 12 includes a linear electrode group (the linear electrode 1Y in FIG. 2) arranged so as to extend in the Y direction.
The induced voltage of 1 to 1Yj) is detected, and the corresponding digital data is supplied to the timing signal controller 2.

FIG. 2 is a block diagram showing an internal configuration example of the information input / output system of FIG.

The clock pulse generator 31 is, for example, 3.
Generates a clock pulse with a frequency of 57MHz and switches 3
It is supplied to the frequency divider 33 via the terminal a and the terminal c of 2. Alternatively, the external clock (EXT CLK) is set to the switch 32.
Is supplied to the frequency divider 33 via the terminals b and c. The frequency divider 33 divides the input clock pulse to generate a drive pulse having a predetermined frequency, supplies the drive pulse to the driver 34, and supplies the drive pulse to the sampling pulse generator 35 and the sample mode signal generator 36. .

A voltage of 24 V is applied to the driver 34 from a power source 39. The driver 34 applies the drive pulses supplied from the frequency divider 33 to the electrodes 3-1 to 3-4 at different phases to drive them.

The electrode 3-1 is the electrode of the channel A (appropriately referred to as CH_A), the electrode 3-2 is the electrode of the channel B (appropriately referred to as CH_B), and the electrode 3-3 is the channel. C electrode (referred to as CH_C as appropriate), electrode 3
-4 is an electrode of channel D (referred to as CH_D as appropriate), which are driven by drive pulses having different phases.

The sampling pulse generator 35 generates a sampling pulse synchronized with the driving pulse supplied from the frequency divider 33 and supplies it to the screen 1. The sample mode signal generator 36 generates a control signal in the detection mode or the data transfer mode in synchronization with the drive pulse supplied from the frequency divider 33, and supplies the control signal to the screen 1.

X electrode detector 11 and Y of screen 1
A voltage of 5 V is applied from the power supply 39 to the electrode detection unit 12.

The X electrode detecting section 11 is constructed as shown in FIG. The high input impedance amplifier 51Xi (i = 1 to 64) that constitutes the amplifier 51 includes the linear electrode 1
The input of the induced voltage generated by Xi is received, the induced voltage is amplified, and output to the low pass filter 52, respectively. The low pass filter 52 is a high input impedance amplifier 5
The signals supplied from 1Xi are each smoothed and output to one input of the comparator 53Xi. Comparator 5
A reference voltage source 54 is connected to the other input of 3Xi via a resistor 55, and a predetermined reference voltage is supplied.

As for the predetermined reference voltage supplied from the reference voltage source 54 to the comparator 53Xi via the resistor 55, the comparator 53Xi outputs the output value of the low pass filter 52 to 2
It is set to a value that can be digitized (for example, 1/2 of the power supply voltage). The comparator 53Xi converts the output of the low-pass filter 52 into digital data by comparing it with a reference voltage, and supplies the digital data to the signal processing unit 56.

The signal processing section 56 includes the comparators 53X.
The digital data supplied from i are each latched to detect the coordinates. Detected data (coordinate data)
Is the data buffer / 232C converter 3 via the signal line 22.
7 is output.

In addition to this, the X-electrode detection unit 11 stores the sampling pulse supplied from the sampling pulse generator 35 and the detection signal in the detection mode or the data transfer mode supplied from the sample mode signal generator 36 in the data buffer. Output to the / 232C converter 37.

Since the structure of the Y electrode detecting section 12 is similar to that of the X electrode detecting section 11 described with reference to FIG. 3, the description thereof will be omitted.

Returning to the explanation of FIG. Data buffer / 232C
As shown in FIG. 4, the converter 37 receives an input of digital data (DIN), an input of a control signal in a detection mode or a data transfer mode, and an input of a sampling pulse from the screen 1 and receives an electrode in the detection mode. Based on the signal from any of 3-1 to 3-4, it is checked whether the linear electrodes Xi, Yj generate the induced voltage, the result is stored in the shift register 71, and the RS232C is used in the data transfer mode. Output to the personal computer 5 via the cable 38 (DOUT).

FIG. 5 is a diagram showing an internal configuration of the shift register 71.

As shown in the figure, 8 channels are provided for each channel.
A bit register is provided, and four sets of CH_A to CH_D (4
One processor is composed of 8-bit registers of (channel).

Specifically, one bit corresponds to the linear electrode 1Xi.
Or, it corresponds to one line of 1Yj and has 8 bits (that is,
One processor is composed of blocks that handle eight linear electrodes. Therefore, although only one processor is shown in FIG. 5, in the present invention, the number of linear electrodes 1Xi is six.
Since it is composed of four linear electrodes 1Yj and is composed of 48 linear electrodes 1Yj, in reality, 14 processors (eight processors in the X-direction linear electrode group and Y-direction linear electrodes) are used. The group consists of 6 processors).

Next, the operation of the timing signal controller 2 will be described with reference to the timing chart of FIG.

FIG. 6A shows a sample mode signal generator 36.
7 shows a control signal output from the data buffer / 232C converter 37 when the control signal is at the high level H, and the data buffer / 232C converter 37 is controlled in the detection mode when the control signal is at the low level L. Are controlled in the data transfer mode.

The sample mode signal generator 36 outputs a high-level H control signal for a period of 573 (≈143.2 × 4 = 572.8) μs, for example. That is, 57
The period of 3 μs is set as the detection section of the induced voltage generated by the linear electrodes Xi and Yj.

FIG. 6B shows a drive pulse applied to the electrode 3-1 (CH_A). The driver 34 is the frequency divider 3
The driving pulse supplied from the electrode 3 is 143.2 μs for one cycle and 35.8 μs for the period of high level H.
1 is applied.

FIG. 6C shows the drive pulse applied to the electrode 3-2 (CH_B). The driver 34 is the frequency divider 3
3 is supplied from No. 3, one cycle is 143.2 μs, the period of high level H is 35.8 μs, and the electrode 3-1.
The drive pulse delayed by 35.8 μs from the drive pulse applied to the electrode 3-2 is applied to the electrode 3-2.

FIG. 6D shows a drive pulse applied to the electrode 3-3 (CH_C). The driver 34 is the frequency divider 3
3, the period of high level H is 35.8 μs and the period of high level H is 35.8 μs.
The drive pulse applied to the electrode 3-1 is delayed by 35.8 μs (71.6 μs from the drive pulse applied to the electrode 3-1).
A driving pulse (delayed by μs) is applied to electrodes 3-3.

FIG. 6E shows a drive pulse applied to the electrode 3-4 (CH_D). The driver 34 is the frequency divider 3
3 is supplied from No. 3, one cycle is 143.2 μs, the period of high level H is 35.8 μs, and the electrode 3-3.
The drive pulse applied to the electrode 3-1 is delayed by a time of 35.8 μs (from the drive pulse applied to the electrode 3-1 to 107.
Driving pulse delayed by 4 μs) electrode 3-4
Apply to.

FIG. 6F shows the sampling pulse generator 35.
It shows the sampling pulse output from the. The cycle of this sampling pulse is set to 35.8 μs (its frequency is set to 27.9 kHz). The sampling pulse generator 35 generates this sampling pulse in synchronization with the drive pulse output from the frequency divider 33.

For example, the human body 4 has electrodes 3-1 to 3-4.
If you are not standing on any of the
When standing on any one of -1 to 3-4 but not touching the screen 1, no induction voltage is generated in the linear electrodes 1Xi, 1Yj. In this case, a low level L signal is detected by the X electrode detection unit 11 and the Y electrode detection unit 12, so low level L digital data is input to the data buffer / 232C converter 37.

The data buffer / 232C converter 37 has the X-coordinate detecting unit 11 and the Y-coordinate detecting unit at the timing of the rising edge of the sampling pulse (FIG. 6F) while the control signal (FIG. 6A) is at the high level H. The 12 outputs are sampled. In this case, since only low-level L digital data is input, the shift register 71
"0" is stored in the bit registers of each channel. When the control signal becomes low level L,
The data stored in the shift register 71 is transferred to the personal computer 5 via the RS232C cable 38. The personal computer 5 judges from the detection data supplied from the timing signal controller 2 that no input from the user is accepted, and the screen 1
The projector 6 is controlled so that the display of does not change.

On the other hand, for example, the human body 4 is connected to the electrode 3
-1 to 3-4, stand on the screen 1
When touched, the induced voltage corresponding to the driving pulse (FIGS. 6B to 6E) causes the linear electrode 1X corresponding to the touched position.
i, 1Yj. In this case, the X electrode detector 11
And the induced voltage is detected in the Y electrode detector 12,
Digital data corresponding to induced voltage is data buffer /
It is input to the 232C converter 37.

The data buffer / 232C converter 37 has the X coordinate detecting section 11 and the Y coordinate detecting section at the timing of the rising edge of the sampling pulse (FIG. 6F) while the control signal (FIG. 6A) is at the high level H. The 12 outputs are sampled.

Specifically, among the sampling pulses shown in FIG. 6F, at the timing of the rising edges of the 1st, 5th, 9th and 13th sampling pulses, it is determined whether or not high level H digital data exists. At the timing of the rising edges of the 2nd, 6th, 10th, and 14th sampling pulses, it is checked whether or not there is high-level H digital data.
At the timing of the rising edges of the 7th, 11th and 15th sampling pulses, it is checked whether or not high level H digital data is present, and the 4th, 8th, 12th, 1st
At the timing of the rising edge of the sixth sampling pulse, it is checked whether or not high level H digital data is present.

That is, when the high-level H digital data exists at the timing of the rising edges of the 1st, 5th, 9th, and 13th sampling pulses of the sampling pulses shown in FIG. An induced voltage corresponding to the applied drive pulse is induced in the linear electrodes 1Xi, 1Yj via the human body 4, and it is determined that the induced voltage is detected by the X electrode detection unit 11 and the Y electrode detection unit 12.

Similarly, when high-level H digital data is present at the timing of the rising edges of the second, sixth, tenth and fourteenth sampling pulses among the sampling pulses shown in FIG. 6F, the electrode 3-2 is used. It is determined that the induced voltage corresponding to the drive pulse applied to the is detected.

If digital data of high level H exists at the timing of the rising edges of the 3rd, 7th, 11th and 15th sampling pulses, the electrode 3-3 is used.
It is determined that the induced voltage corresponding to the drive pulse applied to the is detected.

Furthermore, at the timing of the rising edges of the 4th, 8th, 12th and 16th sampling pulses, if high level H digital data is present, the induction corresponding to the drive pulse applied to the electrode 3-4. It is determined that the voltage has been detected.

As described above, in the present invention, the check is performed four times for each channel in one detection section (a period of 573 μs). This is to improve uncertainty,
Most detected of the four checks (eg,
The level data (detected three times or more) is used as the channel data. That is, when high level H is detected three or more times out of four times, “1” is stored in the bit register of the channel, and the number of times high level H is detected is two.
If it is less than or equal to the number of times, "0" is stored in the bit register of the channel.

When the control signal becomes low level L, the data stored in the shift register 71 (bit register) is transferred to the personal computer 5 via the RS232C cable 38.

Here, the timing of data detection and data transfer in the data buffer / 232C converter 37 will be described with reference to FIG. As shown in the figure, when the human body 4 stands on any of the electrodes 3-1 to 3-4 and touches the screen 1 during the period of 573 μs during which the high-level H control signal is output, driving is performed. Induction voltage corresponding to the pulse is induced to the linear electrodes 1Xi, 1Yj via the human body 4,
The induced voltage is the X electrode detection unit 11 and the Y electrode detection unit 1.
Detected in 2. Then, when the control signal is switched to the low level L, the digital data corresponding to the detected induced voltage is transferred to the personal computer 5 by serial communication. The period of serial communication is 17.7 ms, so the total cycle is 18.3 m.
s.

The personal computer 5 controls the projector 6 based on the detection data supplied from the timing signal control section 2 to project a predetermined image on the screen 1.

For example, the trajectory touched by the human body 4 is projected on the screen 1, or the trajectory projected on the screen 1 depends on which of the electrodes 3-1 to 3-4 the human body 4 stands on. The display color can be changed.

Specifically, the display color of the locus projected when the user standing on the electrode 3-1 touches the screen 1 is set to, for example, "red" and stands on the electrode 3-2. The display color of the trajectory projected when the user touches the screen 1 is set to, for example, “blue”, and the display color of the trajectory projected when the user standing on the electrode 3-3 touches the screen 1 is set. , For example,
The display color of the locus that is set to “yellow” and projected by the user standing on the electrode 3-4 touching the screen 1 is set to, for example, “green”. Therefore, when a plurality of users stand on any of the electrodes 3-1 to 3-4 and touch each of the screens 1, which user stands on which electrode and touches the screen 1 is indicated by its locus. It can be identified from the display color of.

FIG. 8 is a diagram showing a configuration example of another information input / output system to which the present invention is applied. The parts corresponding to those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

In the case of the example in FIG. 8, the screen 1 is constructed on a circular table. That is, as described above, the linear electrode groups (the linear electrodes 1Xi, 1Yj) that are insulated from each other and are arranged in the X and Y directions are provided on the table. In addition, the projector 6 has the screen 1
The electrodes 3-1 to 3-4 are installed under the screen 1, and are arranged so as to surround the screen 1. With this configuration, the influence of the user's shadow disappears.

The electrodes 3-1 to 3-4 are driven by drive pulses having different phases, and four users
When standing on the electrodes 3-1 to 3-4 and touching the screen 1, the induced voltage corresponding to the driving pulse applied to the electrodes 3-1 to 3-4 is applied to the linear electrodes via the respective users. It is guided to 1Xi, 1Yj and supplied to the timing signal control unit 2.

The timing signal controller 2 detects the digital data corresponding to the induced voltage supplied from the screen 1 at the timing of the rising edge of the sampling pulse and supplies it to the personal computer 5. The personal computer 5 uses the detection data supplied from the timing signal control unit 2 so that the display color of the locus projected on the screen 1 is different for each electrode channel.
The projector 6 is controlled.

As a result, channels A to D (electrode 3-
The loci input by each user (1 to 3-4) are displayed in red, blue, yellow, or green, respectively.

FIG. 9 is a diagram showing a configuration example of another information input / output system to which the present invention is applied. The parts corresponding to those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. In the case of this configuration example, an ID signal control unit 101 is provided instead of the timing signal control unit 2.

When the human body 4 stands on any of the electrodes 3-1 to 3-4 and comes into contact with the linear electrode group of the screen 1 with a finger or the like, the driving force applied to the electrodes 3-1 to 3-4. An induced voltage corresponding to the pulse is induced in the linear electrode group via the human body 4. This induced voltage is detected by the X electrode detection unit 11 and the Y electrode detection unit 12, and the corresponding digital data is supplied to the ID signal control unit 101 via the signal line 113.

The ID signal control unit 101 calculates (detects) the XY coordinates on the screen 1 where the induced voltage is generated, based on the digital data corresponding to the induced voltage supplied from the screen 1 through the signal line 113. At the same time, the user's standing position (one of the electrodes 3-1 to 3-4) is detected, and the detection data is supplied to the personal computer 5 via the signal line 114.

The ID signal control unit 101 generates an ID signal,
While being applied to the electrodes 3-1 to 3-4, a sampling pulse for detection for detecting an induced voltage in synchronization with it is generated and supplied to the screen 1 via the signal line 111. The ID signal control unit 101 further generates a detection mode or data transfer mode switching signal and supplies it to the screen 1 via the signal line 112.

FIG. 10 is a block diagram showing an example of the internal configuration of the information input / output system of FIG.

The microprocessor 121 is, for example, 1
Generates a 6-bit ID signal,
2-1 to 122-4, respectively. That is,
By using the ID signals as the signals applied to the electrodes 3-1 to 3-4, it is possible to easily identify the electrode on which the user is standing, as compared with the case of sampling the timing at which the drive pulse is applied to the electrodes. it can. The generated ID
As for the signal, even if an arbitrary bit is used for error correction or the like, 16 bits can generate (represent) a sufficient number of ID signals.

The microprocessor 121 stores the ID signal in memory, generates a drive pulse for constantly outputting the ID signal, and supplies the drive pulse to the latch circuits 122-1 to 122-4 via the signal line 132. Microprocessor 1
Reference numeral 21 gives the latch timings to the latch circuits 122-1 to 122-4 via the signal line 133, respectively.

The microprocessor 121 generates a sampling pulse for detection for detecting the induced voltage, which is synchronized with the ID signal, and the screen 1 is sent via the signal line 111.
And a switching signal for switching the detection mode or the data transfer mode to the acrylic clean 1 via the signal line 112.

Note that the timing pulse for data transfer is common with the sampling pulse for detection, as shown in FIG. That is, the switching signal (see FIG.
When the X electrode detection unit 11 and the Y electrode detection unit 12 of the screen 1 are controlled in the detection mode during the period when A) is at the high level H and the switching signal is switched to the low level L, the X electrode detection unit 11 and the Y electrode. The detector 12 is controlled in the data transfer mode. Therefore, the switching signal (see FIG.
1A) generated during the period of high level H (Fig. 11).
B) is a sampling pulse for detection, and the pulse generated during the low level L period is a timing pulse for data transfer.

The latch circuits 122-1 to 122-4 are
The ID supplied via the signal line 131 based on the fetch timing given from the microprocessor 121.
Latch each signal. The latch circuits 122-1 to 122-4 output the latched ID signal to the driver 123- based on the drive pulse supplied via the signal line 132.
1 to 123-4, respectively.

The drivers 123-1 to 123-4 apply the ID signals supplied from the latch circuits 122-1 to 122-4 to the electrodes 3-1 to 3-4, respectively, to drive them.

Next, the operation of the information input / output system shown in FIG. 9 will be described.

For example, the human body 4 has electrodes 3-1 to 3-4.
If you stand on one of the above and touch screen 1,
An induced voltage corresponding to the ID signal is induced in the linear electrodes 1Xi, 1Yj corresponding to the touched position. In this case, X
The electrode detector 11 and the Y electrode detector 12 detect the induced voltage, and the digital data corresponding to the induced voltage is supplied to the microprocessor 121.

The microprocessor 121 extracts the ID from the digital data supplied from the X electrode detection unit 11 and the Y electrode detection unit 12, and then uses the ID to extract the electrodes 3-1 to 3-3.
Of which of the electrodes the user stands on, the position touched by the user (the XY coordinates on the screen 1 where the induced voltage is generated) is calculated (detected), and the detection data is sent to the signal line. It is supplied to the personal computer 5 via 114.

The personal computer 5, based on the detection data supplied from the microprocessor 121,
The projector 6 is controlled to project a predetermined image on the screen 1.

As described above, the position of the electrode on which the user stands can be easily adjusted by extracting the ID included in the digital data without performing a plurality of checks for each channel in one detection section. Can be identified.

In the above description, four electrodes are arranged. However, the present invention is not limited to this, and any number of electrodes can be arranged.

In this specification, the system means
It represents the entire apparatus composed of a plurality of devices.

[0085]

According to the information processing apparatus and method of the present invention, an induced voltage is generated, the generated induced voltage is induced through the human body, the coordinates at which the induced voltage is induced are detected, and the induced voltage is detected. Since what has occurred is detected, it is possible to identify the chairs or the standing positions of a plurality of users.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of an information input / output system to which the present invention has been applied.

FIG. 2 is a block diagram showing an internal configuration example of the information input / output system of FIG.

FIG. 3 is a diagram showing a configuration example of an X electrode detection unit in FIG.

FIG. 4 is a diagram illustrating input / output of the data buffer / 232C converter of FIG.

5 is a diagram showing an internal configuration of the shift register of FIG.

FIG. 6 is a timing chart for explaining the operation of the timing signal controller.

FIG. 7 is a diagram for explaining the timing of data detection and data transfer in the data buffer / 232C converter.

FIG. 8 is a diagram showing a configuration example of another information input / output system to which the present invention has been applied.

FIG. 9 is a diagram showing a configuration example of still another information input / output system to which the present invention has been applied.

10 is a block diagram illustrating an internal configuration example of the information input / output system in FIG.

FIG. 11 is a diagram illustrating a manner in which a drive pulse for data transfer is superimposed on a sampling pulse for detection.

[Explanation of symbols]

1 acrylic screen, 2 timing signal control section, 3-1 to 3-4 electrodes, 4 human body, 5 personal computer, 6 projector, 11 X electrode detection section, 12 Y electrode detection section, 31 clock pulse generator, 33 frequency division Vessel, 34 driver, 35
Sample pulse generator, 36 sample mode signal generator, 37 data buffer / 232C converter, 51
Amplifier, 52 low-pass filter, 53Xi comparator, 56 signal processing unit, 71 shift register, 101 IC signal control unit, 121 microprocessor, 122-1 to 122-4 latch circuit,
123-1 to 123-4 driver

Claims (8)

[Claims] 1. A plurality of generating means for generating an induced voltage, and an induction for extending the induced voltage generated by the generating means through a human body while extending in a first direction and a second direction. Means, first detecting means for detecting the coordinates of the induced voltage induced by the inducing means on the basis of the induced voltage induced by the inducing means, and the induced voltage among the plurality of generating means. An information processing apparatus, comprising: a second detection unit that detects what has occurred. 2. The information processing apparatus according to claim 1, wherein the plurality of generating means generate the induced voltage at different timings in synchronization with a predetermined drive pulse. 3. The information processing apparatus according to claim 1, further comprising an identification unit that identifies the induced voltage generated by a plurality of the generation units. 4. The information processing apparatus according to claim 3, wherein the identifying means identifies the induced voltage generated by a plurality of the generating means from its ID. 5. The information processing apparatus according to claim 3, wherein the second detecting unit detects the generating unit that has generated the induced voltage from a discrimination result by the discriminating unit. 6. A display control means for controlling display of a display screen based on the coordinates detected by the first detection means and the generation means detected by the second detection means. The information processing apparatus according to claim 1, wherein: 7. The display control means controls the display color of an image displayed on the display screen in response to the generation means detected by the second detection means. 6. The information processing device according to item 6. 8. A generation step of generating an induced voltage from a plurality of generation members, and an induction member extending in a first direction and a second direction,
The induction voltage generated by the process of the generating step, an induction step of inducing through the human body, based on the induction voltage induced by the process of the induction step, the induction voltage in the process of the induction step A first detection step of detecting the induced coordinates, and a second detection step of detecting one of the plurality of generation members that has generated the induced voltage in the processing of the generation step. Information processing method.