JP2004157820A - Electronic seal system and imprint display method for the system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a person to perform a sealing by use of an electronic seal with the same feeling as sealing of a document, and display its imprint in a prescribed position of a digital document displayed on a screen. <P>SOLUTION: This electronic seal system comprises the electronic seal 1, an impression pad 2 for detecting the impression by the electronic seal 1 and a unique identifier given to each electronic seal 1, and calculating and transmitting the impression angle in the impression of the electronic seal 1 to a host device, and the host device preliminarily having unique imprint data of the electronic seal 1, which displays imprint data corresponding to the identifier of the electronic seal in the prescribed position of the screen in conformation to the impression angle transmitted through the impression pad 2. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic seal stamp system and a seal imprint display method in the system for marking a predetermined position of a digital document displayed on a screen.
[0002]
[Prior art]
Conventionally, as a method known as an interface for an approval action for a digital document, there are a method of inputting a personal identification number by a key operation and a method of using an ID card. However, unlike the seals made by Japanese seals, which are traditional Japanese tools for approval, they were not familiar.
[0003]
On the other hand, in order to solve this, the operation feeling of stamping a document with a normal seal and the stamp on a digital document mark Electronic seal systems have emerged that provide realistic representations of shadows.
This is done by using an optical electronic seal stamp that is stamped on a CRT screen of a desktop personal computer or a notebook type TFT liquid crystal screen like an ordinary seal stamp, and identifies the person by collating with memory information inside the seal stamp. In addition, the stamp position is detected and realistic, such as upside down and diagonal stamps. mark Shadow expression is possible (see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-10-149405
[0005]
[Problems to be solved by the invention]
However, according to Patent Document 1 described above, authentication information is set in the electronic seal stamp itself, and although it is prevented from being used illegally, it is necessary to stamp on the screen. Unlike it, there is no denying the unnatural feeling. In other words, it does not completely inherit the traditional seal culture.
[0006]
The present invention has been made in view of the above circumstances, and has a sense that a stamp pad is interposed between an electronic seal stamp and a host device such as a personal computer, and a stamp operation is performed on the stamp pad using the electronic seal stamp. It is an object of the present invention to provide an electronic seal stamp system and a seal imprint display method in the system, in which the seal is imprinted with the same feeling as described above, and the imprint is realistically expressed at a predetermined position of a digital document displayed on a screen.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is an electronic seal stamp system that stamps a predetermined position of a digital document displayed on a screen, and is applied to each of the electronic seal stamp, the stamp by the electronic seal stamp, and the electronic seal stamp A unique identification identifier, and a stamp pad for calculating a stamp angle when the electronic seal stamp is stamped and transmitting it to a host device, and imprint data unique to the electronic seal stamp in advance, and the identifier of the electronic seal stamp And a host device that displays the seal impression data corresponding to the above in a predetermined position on the screen in accordance with the seal angle transmitted through the seal pad.
[0008]
According to the invention described in claim 1, the stamp pad detects a stamp by the electronic seal stamp and a unique identifier given to each of the electronic seal stamps, and calculates a stamp angle when the electronic seal stamp is stamped. The upper device prints the imprint data corresponding to the identifier of the electronic seal stamp at a predetermined position on the screen in accordance with the stamping angle transmitted via the stamp pad. It is possible to provide an electronic seal stamp system that can be imprinted with the same feeling as the user, and that realistically reproduces the seal imprinted at a predetermined position of the digital document displayed on the screen.
[0009]
According to a second aspect of the present invention, in the electronic seal stamp system according to the first aspect, the electronic seal stamp includes a tuning circuit including a transmission coil in which the coil is arranged with a predetermined inclination in a vertical direction, and a control circuit thereof. The control circuit operates by obtaining a transmission carrier from the stamp pad and controls ON / OFF of the transmission circuit connected to the tuning circuit according to each bit constituting the identifier of the electronic seal stamp It is characterized by that.
[0010]
According to the second aspect of the present invention, the control circuit built in the electronic seal stamp operates by obtaining the transmission carrier from the stamp pad, and is connected to the tuning circuit according to each bit constituting the identifier of the electronic seal stamp. By controlling ON / OFF of the transmission circuit, it is possible to transmit an identifier uniquely assigned to an electronic seal stamp without a cord or battery.
[0011]
According to a third aspect of the present invention, in the electronic seal stamp system according to the first or second aspect, (1) when the electronic seal stamp approaches, the stamp pad is arranged at a predetermined interval in each of the XY directions. (2) Measure the reception intensity received by each coil, specify the coil having the highest reception intensity in each of the XY directions, and (3) specify the above And a control circuit that calculates a stamping angle by the electronic seal stamp from a difference in reception intensity between adjacent receiving coils at a certain distance from the coil and transmits it to the host device.
[0012]
According to the third aspect of the present invention, the control circuit built in the stamp pad measures the reception intensity received by the reception coil and specifies the coil having the highest reception intensity in each of the X and Y directions. Then, by calculating the stamping angle by the electronic seal stamp from the difference in reception intensity of adjacent receiving coils at a certain distance from the specified coil and transmitting it to the host device, the host device can obtain the inclination when the seal is applied. Similar realistic imprints can be displayed.
[0013]
According to a fourth aspect of the present invention, in the electronic seal stamp system according to any one of the first or third aspects, the stamp pad has a seal menu including at least “approval” and “denial” on the stamp surface. The printed stamp pad detects a coordinate position stamped by the electronic seal stamp and transmits the detected coordinate position to the host device.
[0014]
According to the fourth aspect of the present invention, the stamp pad is printed with a stamp menu including at least “approval” and “denial” on the stamping surface, and the coordinate position stamped by the electronic seal stamp is detected and the host device By transmitting to, the host device can perform processing on the application according to the seal menu. In addition, “Settlement”, “Conditional settlement”, and “Send back” are available as the seal menu. "Deny" is considered.
[0015]
The invention according to claim 5 is the electronic seal stamp system according to claim 3 or 4, wherein the stamp pad compares an identifier unique to the electronic seal stamp with an identifier assigned to the stamp, and matches the identifier. And a verification circuit for transmitting the coordinate position and the stamping angle to the host device only.
[0016]
According to the fifth aspect of the present invention, the collation circuit built in the stamp pad collates the identifier unique to the electronic seal stamp with the identifier assigned to the stamp pad. By transmitting the coordinate position and the stamp angle, it is possible to check fraudulent acts such as impersonation stamp and stamp copy.
[0017]
According to a sixth aspect of the present invention, in the electronic seal stamp system according to any one of the third to fifth aspects, the stamp pad includes a stamp detection circuit that detects a stamp of the electronic seal stamp by pressure, and the detection circuit. And a display circuit for displaying an energization state by the transmission carrier generated by the power supplied from the host device with the pressure detection by.
[0018]
According to the sixth aspect of the present invention, the display circuit can visually recognize the energized state detected by the stamp detection circuit. Changing the color at the time of stamping will also call attention.
[0019]
The invention according to claim 7 is a seal impression display method in an electronic seal stamp system that stamps a predetermined position of a digital document displayed on a screen, and is applied to each of the stamp by the electronic seal stamp and the electronic seal stamp. Detecting a unique identifier and calculating a stamping angle when the electronic seal stamp is stamped, and imprint data prepared in advance corresponding to the identifier of the electronic seal stamp on the screen according to the stamping angle. And displaying at a predetermined position.
[0020]
According to the invention described in claim 7, the stamp pad detects a stamp by the electronic seal stamp and a unique identifier given to each of the electronic seal stamps, and calculates a stamp angle when the electronic seal stamp is stamped. By displaying the imprint data corresponding to the identifier of the electronic seal stamp at a predetermined position on the screen in accordance with the stamping angle transmitted via the stamping pad, The document can be stamped with the same feeling as the stamping on the document, and the imprint imprinted on the digital document displayed on the screen can be realistically reproduced.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing an example of the appearance of an electronic seal stamp system according to the present invention. The electronic seal stamp system includes an electronic seal stamp 1, a stamp pad 2, and a personal computer (PC) as a host device (not shown).
The electronic seal stamp 1 has the same shape as an actual seal stamp and is given a unique identifier (ID). The shape is, for example, a length of 70 mm and a diameter of 10 mm, and an imprint is dug (not essential). Therefore, it is possible to stamp paper. In addition, the stamp pad 2 has six stamp menus such as “approval”, “settlement”, and “deny” printed at the center, and an indicator 20 is mounted on the upper right portion of the stamp pad 2.
The indicator 20 is activated by bringing the electronic seal stamp 1 close to the print menu portion, and a click feeling such as a tact switch is obtained by imprinting the stamp, and the imprint menu is notified to a host device (not shown). ing. The stamp pad 2 is a device that is connected to a PC (not shown) via a USB (Universal Serial Interface Bus), and transmits information about coordinates, rotation angle, presence / absence of pressure, and electronic seal ID to the PC.
[0022]
The stamp pad 2 has a rectangular shape in FIG. 1, but may have a round shape as shown in FIG. However, if the substrate shape is a circle itself, about two substrates are required to secure the component space, which increases the cost. Therefore, as shown in FIG. 2, it is conceivable to form a single substrate by providing a square portion on the upper side. In this case, the outer shape is 80 mm, the inner diameter that becomes the stamping region is 30 mm, and the thickness is about 15 mm.
The imprint menu is not printed on the imprint pad 2 shown here, and therefore, a simple imprint pad for detecting only whether or not the electronic seal stamp 1 is imprinted is used.
[0023]
FIG. 3 is a flowchart cited for explaining the basic operation of the electronic seal stamp system of the present invention.
The operation at the application level of the electronic seal stamp system of the present invention will be described below using the flowchart shown in FIG.
[0024]
In the preparation stage, it is assumed that a higher-level device such as a PC has previously taken seal stamp data from a server (not shown).
First, when the stamp pad 2 detects that the electronic seal stamp 1 has approached (by electromagnetic induction) (S31 Yes), the indicator 20 is turned on, and the ID uniquely assigned to the electronic stamp 1 and the stamp pad 2 are given. The ID is collated (S32). If there is a mismatch, do nothing.
Here, when the collation is obtained (match), the ID of the electronic seal stamp 1 and the rotation angle of the stamp are calculated and transmitted to the host device (PC) (S33). The calculation of the rotation angle of the stamp will be described later.
[0025]
Next, in the host device, the ID of the electronic seal stamp and the rotation angle of the seal received by the USB driver (software) are passed to the application (S34), and the application that has received this retrieves the seal impression data corresponding to the ID, The imprint is displayed in accordance with the previous stamp angle (S35).
Then, it is checked whether or not the seal stamp has been pressed (S36). When it is detected that the stamp has been pressed (S36 Yes), the USB driver notifies the application that the electronic seal stamp 1 has been pressed (S37). The application performs a sealing process (approval / denial) (S38).
[0026]
Hereinafter, the electronic seal stamp system of the present invention will be described in detail. FIG. 4 is a cross-sectional view cited for explaining the internal structure of the electronic seal stamp 1 and the stamp pad 2.
The electronic seal 1 includes a seal circuit 10, and a coil 11 (hereinafter referred to as “transmission coil 12 including ferrite”) is wound around a ferrite 11 separately from the seal circuit 10, and is mounted with an inclination of about 10 degrees. The stamping angle of the electronic stamp 1 is detected by the inclination of the transmission coil 12. Note that the angle of inclination depends on the sensitivity of the voltage level obtained for calculating the rotation angle by electromagnetic induction, Child Depends on the size of the seal 1
On the other hand, inside the stamp pad 2, an antenna printed board 21 is first provided on the upper surface, and a permalloy 22 for shielding is attached to the back thereof. The antenna printed circuit board 21 is connected to a pad circuit printed circuit board 23, and an electronic component 24 is arranged on the pad circuit printed circuit board 23, and corresponds to each of the above-described stamp menus at the approximate center. A pressure sensor 25 is mounted. The pressure when the electronic seal stamp 1 is stamped is detected by the pressure sensor 25 to detect the stamp.
Further, the pad circuit printed board 23 is connected to a PC as a host device via the USB cable 26.
[0027]
FIG. 5 is a diagram cited for explaining the connection configuration of the antenna printed board 21 and the pad circuit printed board 23 shown in FIG. 4, that is, the internal configuration of the stamp pad 2.
In FIG. 5, the antenna printed circuit board 21 has coils (Xi: X0 to X15, Yi; Y0 to Y11) arranged in a narrow width in the X direction and the Y direction. An outer peripheral coil 30 is wound around the outer periphery of the outer periphery.
[0028]
When a transmission carrier is generated via the microcomputer 231 of the pad circuit printed board 23, a current is passed through the outer peripheral coil 30 via the driver 232. Thereafter, when the electronic seal stamp 1 is brought close to (about 5 mm), the X and Y direction coils are selected by the pad circuit printed board 23, and signals in the X and Y directions are received, and the amplitude of the received signal is set. Detection is performed by the pad circuit printed board 23 (amplifier 233, filter 234, detection circuit 235, A / D (Analog Digital) conversion circuit 236).
The detected reception signal is processed by the microcomputer 231 and output via the USB cable 26 to be sent to the PC of the host device. Reference numeral 237 denotes the pressure sensor 25 shown in FIG. 4, and a semiconductor strain type pressure sensor is used here.
Although not shown here, the above-described indicator 20 is also mounted, and this indicator 20 is energized by a transmission carrier generated by the power supplied from the PC via USB with the pressure detection by the pressure sensor 237 as a trigger. The status is displayed.
[0029]
FIG. 6 is a timing chart cited for explaining the relationship between the transmission carrier, the received signal, and the ID detection timing.
Here, in order from the top, (a) transmission carrier, (b) antenna changeover switch control (microcomputer 231 output), (c) reception signal ("1" output), (d) reception signal ("0" output) ), (E) A / D conversion timing is shown.
First, the transmission carrier is supplied to the antenna printed circuit board 21 through the microcomputer 231 for a certain period by the power supplied from the PC power supply via the USB, and the antenna changeover switch control by the microcomputer 231 is in the “OFF” state during that period. is there. When the supply of the transmission carrier is stopped, the reception signal of the coil Xi or Yi is switched.
As a result, the received signal is detected. Due to the difference in the length of the received signal at the time of “1” output and “0” output, the first half part is for detecting coordinates and rotation angle at the timing of A / D conversion, and the second half part. Is for “1” / “0” determination of ID detection.
[0030]
FIG. 7 is a diagram cited for explaining the internal configuration of the seal circuit 10 incorporated in the electronic seal stamp 1.
Here, the seal circuit 10 includes a tuning circuit 101, a comparator 102, a buffer 103, a microcomputer 104, and an ID memory circuit 105.
The seal circuit 10 takes in a transmission carrier from the outer peripheral coil 30 of the antenna printed circuit board 21 via a tuning circuit 101 formed of an LC resonance circuit, and supplies + power and −power. Further, the comparator 102 detects ON / OFF of the transmission carrier. Here, 74HC126 is used as the buffer 103, and this 74HC126 is constituted by a tri-state CMOS logic IC, and forms an oscillation circuit by applying positive feedback to the tuning circuit 101 through the capacitor C4. Therefore, oscillation can be controlled by the tristate control terminal (ON / OFF).
Hereinafter, the buffer 103 is referred to as a transmission circuit 103.
[0031]
FIG. 8 is a timing chart quoted for explaining the operation of the seal circuit 10.
Here, in order from the top, (a) tuning circuit 101 (when “1” is output), (b) tuning circuit 101 (when “0” is output), (c) comparator 102 output, and (d) transmission circuit 103 (control terminal) Each of “1” output) and (e) transmission circuit 103 (when control terminal “0” is output) are shown.
[0032]
In FIG. 8, when the output signal of the comparator 102 changes from “1” to “0” in the tuning circuit 101 built in the seal circuit 10 with the signal waveform at the time of “1” output and the signal waveform at the time of “0” output. The microcomputer 104 turns on the control terminal of the transmission circuit 103. Thus, when the transmission circuit 103 outputs “1”, the “ON” state continues for a certain length during which the tuning circuit 101 oscillates, and even when “0” is output, tuning is performed when “0” is output. The “ON” state continues for a certain length of time during which the circuit 101 oscillates.
[0033]
FIG. 9 is a flowchart showing the processing flow of the microcomputer 104 built in the seal circuit 10.
In FIG. 9, the microcomputer 104 waits for the output of the comparator 102 to change from “1” to “0” (S91), and when it becomes “0”, the control terminal of the transmission circuit 103 is turned “ON”. (S92).
Thereafter, after waiting for a certain period (S93), the next bit of the ID memory circuit 105 is read (S94). If it is “0” or “1” (S95), when it is “1”, it waits for a further fixed period (S96), and when it is “0”, the control terminal of the oscillation circuit is set to “OFF” ( S97). The ID of the electronic seal stamp 1 is recognized as described above.
[0034]
FIG. 10 shows a received signal waveform of the stamp pad 2. Here, the horizontal axis represents the displacement amount X, and the vertical axis represents the intensity S of the received signal.
By the way, when there is no inclination (rotation angle) in the transmission coil 12 of the electronic seal stamp 1, the received signal strength (dashed line) is substantially symmetrical about Xn (Xn-1 to Xn-4, Xn + 1 to Xn + 4). ), For example, when the inclination (rotation angle) is 20 degrees, this signal waveform ( solid line ) Is below the slope 0 waveform on the left side of the displacement and above the slope 0 waveform on the right side of the displacement.
Therefore, the stamping angle (= rotation angle) is determined from the difference between the left and right signal strengths. Specifically, the rotation angle of the stamp of the electronic seal stamp 1 is obtained from the degree of inclination in the X-axis direction and the degree of inclination in the Y-axis direction.
[0035]
FIG. 11 is a flowchart showing a processing procedure for obtaining the position coordinates and the stamping angle by the microcomputer 231 built in the stamping pad 2. Detailed description will be given below.
First, with the received signal waveform shown in FIG. 10, the microcomputer 231 sequentially switches the antenna selector switch to X0 to X15 and Y0 to Y11, and measures the received signal strength of each coil in the X direction and Y direction (S111). Here, the coil having the maximum value among X0 to X15 is defined as Xn (S112). Similarly, the coil having the maximum value from Y0 to Y11 is set to Ym (S113).
In this case, the coordinates and the rotation angle can be calculated from these values as follows (S114).
[0036]
Coordinate value = (n, m)
Rotation angle = tan ^-1 (((S (Y _{m + 3} ) -S (Y _m-3 )) / (S (Y _{m + 3} ) + S (Y _m-3 )))) / ((S (X _{n + 3} ) -S (X _n-3 )) / (S (X _{n + 3} ) + S (X _n-3 ))))
Here, the coordinate accuracy is sufficient if the position is known, and if it is desired to obtain the coordinates with high accuracy, it can be obtained by interpolating the three values at both ends around Xn into a quadratic curve.
[0037]
That is, the X-axis detection waveform of the stamp pad 2 is viewed with the stamp angle of the electronic stamp 1 rotated by 45 degrees. Here, if the signal level of the reception coil Xn-3 is VL and the signal level of the reception coil Xn + 3 is VR, a signal level difference is generated between VL and VR due to the inclination of the transmission coil 12 inside the potential stamp 1. Therefore, the inclination of the X axis is defined as shown in equation (1), and the value of the inclination of the Y axis is defined as shown in equation (2) from the signal levels of VR and VL on the Y axis in the same way.
(1) Inclination X = (VR−VL) / (VR + VL)
(2) Inclination Y = (VR−VL) / (VR + VL)
From these X and Y inclinations, the rotation angle θ of the electronic seal stamp 1 is obtained by calculating the following equation (3).
(3) Rotation angle θ = tan ^-1 (Slope Y value / Slope X value)
[0038]
By transferring the ID code, coordinate position, and stamping angle information detected or calculated as described above to the host device via the USB, the application of the host device searches for the imprint data corresponding to the ID. Take out and seal angle It is displayed at a predetermined position on the screen according to the information.
[0039]
As described above, according to the present invention, a stamp pad is interposed between an electronic seal stamp and a host device such as a personal computer, and the stamp pad is subjected to a stamp operation by the electronic seal stamp. The present invention provides an electronic seal stamp system that realistically represents an imprint on a predetermined position of a digital document displayed on a screen, and a seal imprint display method in the system.
In the above-described embodiment of the present invention, the imprint information is described as being held by the host device. However, the stamp information may be held by the stamp pad 2, and in this case, the load on the host device is reduced.
[0040]
【The invention's effect】
According to the first aspect of the present invention, a stamp pad is interposed between the electronic seal stamp and a host device such as a personal computer, and the user feels that the user stamps the document by performing the stamp operation with the electronic seal stamp. It is possible to provide an electronic seal stamp system that can be imprinted with the same feeling as in the above, and that realistically reproduces a seal imprinted at a predetermined position of a digital document displayed on the screen.
[0041]
According to the second aspect of the present invention, the transmission carrier is obtained from the stamp pad and operates to control ON / OFF of the transmission circuit connected to the tuning circuit in accordance with each bit constituting the identifier of the electronic seal stamp. Thus, an identifier uniquely assigned to an electronic seal stamp can be transmitted without a cord or battery.
[0042]
According to the third aspect of the present invention, the reception intensity received by the reception coil is measured, the coil having the highest reception intensity in each of the X and Y directions is specified, and a certain constant is determined from the specified coil. By calculating the stamping angle by the electronic seal stamp from the difference in reception intensity between adjacent receiving coils with a distance and transmitting it to the host device, the host device can realistically express the imprint similar to the inclination when the stamp is made.
[0043]
According to the fourth aspect of the present invention, the stamp pad is printed with a stamp menu including at least “approval” and “denial” on the stamping surface, and the coordinate position stamped by the electronic seal stamp is detected and the host device By transmitting to, the host device can perform processing on the application according to the seal menu.
[0044]
According to the invention described in claim 5, by comparing the identifier unique to the electronic seal stamp with the identifier assigned to the stamp pad, and transmitting the coordinate position and the stamp angle to the host device only when they match, It is possible to check fraudulent acts such as impersonation imprinting and stamp duplication.
[0045]
According to the sixth aspect of the present invention, the display circuit can visually recognize the energized state detected by the stamp detection circuit. Changing the color at the time of stamping will also call attention.
[0046]
According to the invention described in claim 7, the stamp pad detects a stamp by the electronic seal stamp and a unique identifier given to each of the electronic seal stamps, and calculates a stamp angle when the electronic seal stamp is stamped. By displaying the imprint data corresponding to the identifier of the electronic seal stamp at a predetermined position on the screen in accordance with the stamping angle transmitted via the stamping pad, The document can be stamped with the same feeling as the stamping on the document, and the imprint imprinted on the digital document displayed on the screen can be realistically reproduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of the appearance of an electronic seal stamp system according to the present invention.
FIG. 2 is a diagram showing another example of the appearance of the electronic seal stamp system according to the present invention.
FIG. 3 is a flowchart cited for explaining the basic operation of the electronic seal stamp system of the present invention.
FIG. 4 is a cross-sectional view cited for explaining the internal structure of an electronic seal stamp and a stamp pad constituting the electronic seal stamp system of the present invention.
FIG. 5 is a diagram cited for explaining the internal configuration of a stamp pad used in the electronic seal stamp system of the present invention.
FIG. 6 is a diagram cited for explaining the operation of the embodiment of the present invention, and is a timing chart showing the relationship between a transmission carrier, a received signal, and ID detection timing.
FIG. 7 is a diagram cited for explaining the internal configuration of a seal circuit built in the electronic seal stamp used in the electronic seal stamp system of the present invention.
FIG. 8 is a timing chart showing the operation of the seal circuit, which is cited for explaining the operation of the embodiment of the present invention.
FIG. 9 is a diagram cited for explaining the operation of the embodiment of the present invention, and is a diagram showing a flow of processing of the microcomputer built in the seal circuit in a flowchart.
FIG. 10 is a diagram cited for explaining the detection of the rotation angle by the electronic seal stamp system according to the present invention, and is a diagram showing the strength with respect to the position of the received signal by the stamp pad.
FIG. 11 is a flowchart quoted for explaining the operation of the embodiment of the present invention, and is a flowchart showing a processing procedure for obtaining a position coordinate and a stamping angle by a microcomputer built in the stamping pad.
[Explanation of symbols]
1 Electronic seal
2 stamp pad
20 Indicator
21 Antenna printed circuit board
22 Permalloy
23 Pad Circuit Printed Circuit Board
24 Electronic components
25 (237) Pressure sensor
30 outer coil
101 Tuning circuit
104 Microcomputer (control circuit)
231 Microcomputer (control circuit)

Claims (7)

An electronic seal stamp system that stamps a predetermined position of a digital document displayed on a screen,
Electronic seal,
A stamp pad that detects a stamp by the electronic seal stamp and a unique identifier assigned to each of the electronic seal stamps, calculates a stamp angle when the electronic seal stamp is stamped, and transmits the stamp angle to a host device;
A host device that includes imprint data unique to the electronic seal stamp in advance, and displays the imprint data corresponding to the identifier of the electronic seal stamp at a predetermined position on the screen in accordance with the stamp angle transmitted through the stamp pad;
An electronic seal stamp system comprising: The electronic seal stamp includes a tuning circuit including a transmission coil in which the coil is arranged with a predetermined inclination in the vertical direction, and a control circuit thereof.
The control circuit operates by obtaining a transmission carrier from the stamp pad, and controls ON / OFF of the transmission circuit connected to the tuning circuit in accordance with each bit constituting the identifier of the electronic seal stamp. The electronic seal stamp system according to claim 1. The stamp pad is
(1) When the electronic seal stamp approaches, a plurality of receiving coils arranged at predetermined intervals in the X and Y directions are sequentially switched in the X and Y directions,
(2) Measure the reception strength received by each coil, identify the coil having the highest reception strength in each of the X and Y directions,
(3) A control circuit is provided that calculates a seal angle by the electronic seal stamp from a difference in reception intensity between adjacent receive coils at a certain distance from the identified coil and transmits the calculated stamp angle to the host device. The electronic seal stamp system according to claim 1 or 2. On the stamp pad, a stamp menu including at least “Approve” and “Deny” is printed on the stamp surface, and the stamp pad detects the coordinate position stamped by the electronic seal stamp and transmits it to the host device. The electronic seal stamp system according to any one of claims 1 and 3. The stamp pad is
A collation circuit that collates an identifier unique to the electronic seal stamp and an identifier assigned to the electronic seal stamp, and transmits the coordinate position and the stamping angle to the host device only when they match.
The electronic seal stamp system according to claim 3 or 4, characterized by comprising: The stamp pad is
A seal detection circuit for detecting the pressure of the imprint of the electronic seal, and a display circuit for displaying the current status by transmitting carriers generated by electric power supplied from the host device to trigger the pressure detection by the detection circuit,
The electronic seal stamp system according to claim 3, wherein the electronic seal stamp system is provided. A seal imprint display method in an electronic seal stamp system that stamps a predetermined position of a digital document displayed on a screen,
Detecting a stamp by an electronic seal stamp and a unique identifier given to each of the electronic seal stamps, and calculating a stamping angle when the electronic seal stamp is stamped;
Displaying the seal data prepared in advance corresponding to the identifier of the electronic seal stamp at a predetermined position on the screen according to the stamping angle;
An imprint display method in an electronic seal stamp system, characterized by comprising:

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