JP2015228138A - Writing feature detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing feature detection device capable of detecting, as information to be used for user authentication, information that can be used to perform highly reliable authentication.SOLUTION: The writing feature detection device is provided with a signal output part, the signal output part comprising a sensing element that comprises a plurality of sensing elements 60 containing: a base material 62 formed of a pressure sensitive material having a characteristic in which conductance changes in accordance with an applied pressure; and conductive particles 63 dispersed in the base material 62. In the sensing element, the conductance of the sensing elements 60 corresponding to an input position of writing action increases along with the increase in pressure applied to the input position. The signal output part outputs a signal for detection that contains a signal corresponding to the magnitude of the conductance of each of the plurality of sensing elements 60 such that on the basis of the signal for detection, a writing locus indicating the input position of the writing action, and a writing pressure indicating the magnitude of the pressure applied to the input position are detected as information to be used for user authentication.

Description

  The present invention relates to a writing feature detection apparatus that detects information used for user authentication.

  In recent years, a technique for authenticating a user of an electronic device based on information input to the electronic device has been developed. For example, a personal identification number or password input to the electronic device is used for authentication, and when the authentication is successful, the electronic device exhibits a predetermined function.

  The information used for authentication is desirably information unique to an individual in order to prevent a third party impersonating a legitimate user from being authenticated as a legitimate user. An example of such information is handwriting. For example, the detection device detects a trajectory of a character such as a name input by handwriting by a user, and the detected trajectory is used for authentication (see Patent Document 1).

JP 2009-171418 A

  By the way, since information used after user authentication often includes highly confidential information such as credit card information and electronic money information, higher reliability is required for user authentication. ing. Therefore, it is desirable that the information detected by the detection device as information used for authentication is information that can be used for authentication with higher reliability by using the information.

  An object of the present invention is to provide a writing feature detection apparatus capable of detecting information that can be authenticated with higher reliability as information used for user authentication.

  A writing feature detection apparatus that solves the above-described problem includes a writing area that is an area in which a writing operation is input by a user, and a plurality of input positions that are positions in the writing area where the writing operation is input, and the input A signal output unit that outputs a detection signal that is a signal corresponding to the magnitude of the pressure applied to each of the positions, and is used for authentication of the user based on the detection signal output by the signal output unit. As information, it is a writing feature detection apparatus provided with the detection part which detects the writing locus | trajectory which shows these input positions, and the writing pressure which shows the magnitude | size of the pressure applied to each of the said input positions. The signal output unit is a base material made of a pressure-sensitive material, and the base material made of the pressure-sensitive material having a property that conductance changes according to the pressure applied to the pressure-sensitive material; and the base material A sensing element having a plurality of sensing elements dispersed therein, wherein the conductance of the sensing element corresponding to each of the input positions increases the pressure applied to the input position. The sensing element increases with the increase, and the detection signal includes a signal corresponding to the conductance of each of the plurality of sensing elements.

  A writing feature detection device that solves the above-described problem is provided in a writing instrument used for a writing operation by a user, and a plurality of input positions that are positions where the writing operation is input, and a pressure applied to each of the input positions A signal output unit that outputs a detection signal that is a signal according to the magnitude of the signal, and the plurality of input positions as information used for user authentication based on the detection signal output by the signal output unit And a detection unit that detects a writing pressure indicating the magnitude of the pressure applied to each of the input positions. The signal output unit is a base material made of a pressure-sensitive material, and the base material made of the pressure-sensitive material having a property that conductance changes according to the pressure applied to the pressure-sensitive material; and the base material A sensing element including conductive particles dispersed therein, wherein the sensing element increases in conductance with an increase in pressure applied at the input position, and the detection signal is A signal corresponding to the conductance for each of the input positions in the sensing element is included.

  According to the above configuration, the writing trajectory and the writing pressure are detected as information used for user authentication. If the writing trajectory and the writing pressure are used for authentication, compared to the case where only the writing trajectory is used for authentication, the number of elements to be verified in the authentication process increases, so that the reliability of authentication is improved. Therefore, the writing feature detection apparatus can detect information that can be authenticated with higher reliability as information used for user authentication.

In the writing feature detection apparatus, it is preferable that the conductance of the sensing element increases linearly with an increase in pressure applied to the input position.
In the writing feature detection apparatus, it is preferable that the conductance of the sensing element increases linearly with an increase in pressure applied at the input position.

According to the above configuration, the writing pressure based on the detection signal can be easily calculated, and the writing pressure is calculated with a certain accuracy regardless of the magnitude of the applied pressure.
The writing feature detection apparatus includes: an authentication unit that authenticates the user using the writing locus and the writing pressure detected by the detection unit; and the writing locus and the writing pressure that are verified when the authentication unit performs the authentication. It is preferable to further include a storage unit storing basic data to be processed.

According to the said structure, since the writing locus | trajectory and writing pressure which the detection part detected are used, the reliability of the user authentication by a writing characteristic apparatus is improved.
The writing feature detection apparatus further includes an authentication result processing unit that performs predetermined processing according to a result of the user authentication performed using the writing locus detected by the detection unit and the writing pressure. Is preferred.

  According to the above configuration, the writing feature detection device performs a predetermined process using the result of the user authentication performed using the writing trajectory and the writing pressure detected by the detection unit. Security at the time is increased.

The writing feature detection device is preferably a card-type device.
Since the writing feature detection device including the signal output unit having the sensing element can be thinned, according to the above configuration, even if the writing feature detection device is a card-type device that is required to be thin, The demand can be satisfied.

  According to the present invention, it is possible to detect information that can be authenticated with higher reliability as information used for user authentication.

It is a figure which shows an example of the external appearance of a writing feature detection apparatus. It is a block diagram which shows the functional structure of the writing feature detection apparatus of one Embodiment. It is a figure which shows schematic structure of the signal detection part in the writing feature detection apparatus of one Embodiment. It is a figure which shows schematic structure of the sensing element in the writing feature detection apparatus of one Embodiment. It is a figure which shows typically the relationship between the pressure in the sensing element of one Embodiment, and conductance.

An embodiment of a writing feature detection apparatus will be described with reference to FIGS.
[Configuration of Written Feature Detection Device]
As shown in FIG. 1, a writing area 11 is defined on the surface of the writing feature detection device 10. The writing area 11 is an area where a user writes a character or the like by hand when receiving authentication, and is an area into which a writing operation that is an operation of writing a character or the like is input. The character or the like may be a character, a symbol, or a figure, and may be expressed by at least one of a line or a point. A character etc. may be written with a user's finger | toe, and may be written with a pen-shaped tool. In the writing area 11, a trajectory such as a character written by the user may be displayed or may not be displayed.

  As long as the writing feature detection device 10 has a writing region 11 and detects information used for user authentication based on a writing operation input to the writing region 11, its shape, size, and function are not limited. .

  In an example of an aspect of use of the writing feature detection device 10 in user authentication, the writing feature detection device 10 includes an authentication function using this information in addition to the information detection function used for user authentication, and the authentication result. And an execution function of processing using.

  In this case, the writing feature detection device 10 performs an authentication process inside the writing feature detection device 10 using information detected by the writing feature detection device 10 based on a writing operation being input to the writing region 11. And the writing feature detection apparatus 10 performs the predetermined | prescribed process according to the result of authentication.

  A specific example of such a writing feature detection apparatus 10 is, for example, a card-type apparatus having a display unit 12 as shown in FIG. The writing feature detection apparatus 10 displays predetermined information on the display unit 12 according to the authentication result. For example, the writing feature detection device 10 may display information indicating the success or failure of the authentication on the display unit 12. If the authentication is successful, the writing feature detection device 10 generates based on the unique information stored in the writing feature detection device 10. Information such as the one-time password information may be displayed on the display unit 12. Alternatively, the process executed by the writing feature detection apparatus 10 according to the authentication result may be transmission of data to an external apparatus or transmission of a signal for instructing a predetermined operation to the external apparatus.

  Note that the present invention is not limited to the card-type device shown in FIG. 1, and any electronic device that performs a predetermined process after user authentication can perform the writing feature detection of the present embodiment regardless of the content of the process to be performed. The configuration of the device 10 is applicable. For example, the writing feature detection device 10 may be embodied in a tablet-shaped terminal, a wearable terminal, a building material sheet, or a device in which these are combined.

  As a modification of the above configuration, the writing feature detection apparatus 10 may not have a function for executing a process using the authentication result. In this case, the writing feature detection device 10 transmits an authentication result to an external device, and the external device performs a predetermined process according to the authentication result received from the writing feature detection device 10.

  In another example of the aspect of using the writing feature detection device 10 in user authentication, the writing feature detection device 10 has a function of detecting information used for user authentication, an authentication function using this information, and Does not have a function to execute processing using the authentication result.

  In this case, the writing feature detection device 10 transmits information detected by the writing feature detection device 10 based on the input of the writing operation to the writing region 11 to an external device. And an external apparatus performs an authentication process based on the information received from the writing feature detection apparatus 10, and performs the predetermined | prescribed process according to the result of authentication.

  A specific example of such a writing feature detection apparatus 10 is an apparatus used for user authentication when using a credit card or a cash card, for example. For example, the writing feature detection device 10 has a tablet shape, and information detected by the writing feature detection device 10 is input to an external device such as a server of a credit card company or a bank through input of a writing operation to the writing region 11. Send. The external device performs an authentication process based on the information received from the writing feature detection device 10, and when the authentication is successful, the credit card settlement or cash withdrawal is permitted.

  As a modification of the above configuration, the writing feature detection apparatus 10 may have a function for executing a process using the authentication result. In this case, the external device transmits the authentication result to the writing feature detection device 10, and the writing feature detection device 10 executes a predetermined process according to the authentication result received from the external device.

  In addition, the writing feature detection device 10 may be used for user authentication in a mode in which the above modes are combined. For example, depending on the content of the process using the authentication result, it may be selected whether the writing feature detection apparatus 10 performs the authentication process or an external apparatus performs the authentication process. Alternatively, the authentication process may be performed by both the writing feature detection device 10 and an external device.

  When the writing feature detection device 10 communicates with an external device, the communication may be wireless non-contact communication, wired communication, or a contact terminal. Contact communication may be used.

With reference to FIG. 2, the functional configuration of the writing feature detection apparatus 10 will be described.
As shown in FIG. 2, the writing feature detection apparatus 10 includes a control unit 20, a storage unit 30, a power supply unit 40, and a signal output unit 50 including a writing area 11.

  The control unit 20 includes a CPU, and controls the operation of each unit connected to the control unit 20 and various arithmetic processes based on programs and data stored in the storage unit 30. As a part of such processing, the control unit 20 functions as a detection unit and detects information indicating the characteristics of the writing operation input to the writing area 11. The control unit 20 may also function as an authentication unit that performs user authentication or an authentication result processing unit that performs predetermined processing according to the authentication result.

  The storage unit 30 includes a volatile memory and a non-volatile memory, and temporarily or permanently stores programs and data used for processing of the control unit 20. The data stored in the storage unit 30 is preferably managed by the security chip.

  When the control unit 20 functions as a detection unit, the control unit 20 outputs a control signal to the signal output unit 50 via an interface (not shown), and the signal output unit 50 writes characters and the like in the writing area 11. A detection signal, which is a signal corresponding to a plurality of input positions that are the positions and the magnitude of pressure applied to each of the input positions, is output to the control unit 20 via the interface or the like.

  The control unit 20 inputs the writing trajectory indicating the plurality of input positions and the writing operation from the detection signal output from the signal output unit 50 based on the data stored in the storage unit 30. A writing pressure, which is a pressure applied to each of the positions, is detected.

  The writing trajectory indicates a position where a character or the like is written on a plane along the surface of the writing area 11. In the writing area 11, it is determined that the position where pressure is applied is the position where characters or the like are written. A direction along the surface of the writing area 11 and two directions orthogonal to each other are defined as an X direction and a Y direction. The writing trajectory has an axis along the X direction and an axis along the Y direction as coordinate axes. A set of a plurality of points in the orthogonal coordinate system.

The writing pressure indicates the magnitude of the pressure applied in the Z direction for each of a plurality of points constituting the writing trajectory when the direction orthogonal to the X direction and the Y direction is the Z direction.
As described above, the control unit 20 detects the writing trajectory and the writing pressure as information indicating the characteristics of the writing operation input to the writing area 11. The detected writing trajectory and writing pressure are used for user authentication by the writing feature detection device 10 or an external device as described above.

  When the writing feature detection apparatus 10 performs authentication, the storage unit 30 causes the control unit 20 to function as an authentication unit to perform authentication processing, and the writing locus and writing pressure basic data used for verification in the authentication processing. Is remembered.

  The basic data of the writing trajectory and the writing pressure is generated based on the writing operation previously input to the writing area 11 by the user and stored in the storage unit 30. Writing such as characters in the writing area 11 for generating such basic data is performed a plurality of times before the writing feature detection device 10 is used for user authentication, for example.

  When the user is authenticated, the user writes the same characters or the like in the writing area 11 as when generating the basic data, and the control unit 20 detects the writing trajectory and the writing pressure based on the writing operation. . And the control part 20 determines the success or failure of authentication by verifying the matching degree with the detected writing locus | trajectory and writing pressure, and basic data as an authentication process.

  Verification of the degree of coincidence using the writing pressure may be performed by comparing the absolute magnitude of the writing pressure at each point constituting the writing locus with the basic data, or at each point constituting the writing locus. You may perform by comparing the relative magnitude of writing pressure, ie, the pressure distribution in a writing locus, with basic data. When the degree of coincidence is verified using the pressure distribution, the user's writing behavior, such as which part tends to apply force when the user writes characters, etc. is easily reflected in the authentication, and the writing instrument changes, etc. Thus, even if the average value of the writing pressure changes with every writing operation, the accuracy of authentication is improved.

  The authentication process only needs to be performed directly or indirectly using the detected writing trajectory and the writing pressure, and the control unit 20 includes a plurality of points constituting the detected writing trajectory and the writing pressure. May be extracted as feature points, and the success / failure of the authentication may be determined by comparing the position, pressure, and trajectory accuracy of the feature points with the basic data. In this case, the basic data may also be data obtained by extracting feature points from the writing trajectory and the writing pressure obtained based on the writing operation previously input to the writing area 11. According to such a configuration, the amount of data used for the authentication process of the control unit 20 and the amount of data stored in the storage unit 30 are reduced, so the load required for the processing of the control unit 20 and the storage unit 30 is reduced. be able to.

  When the external device performs the authentication process, the control unit 20 transmits the detected writing trajectory and the writing pressure to the external device via an interface (not shown). The basic data of the writing trajectory and the writing pressure are stored in an external device. Also in this case, the authentication process may be performed using the feature points extracted from the writing trajectory and the writing pressure.

  When the control unit 20 functions as an authentication result processing unit, the control unit 20 performs predetermined processing according to the authentication result by the control unit 20 or the authentication result received by the writing feature detection device 10 from an external device. I do.

  The power supply unit 40 generates power required to drive the control unit 20, the storage unit 30, and the signal output unit 50. The generation of power in the power supply unit 40 may be performed by a primary battery, may be performed by a secondary battery, may be performed by an energy harvest method such as a solar cell, an electric double layer capacitor, or the like The capacitor may be used. The charging method for the secondary battery or the capacitor is not particularly limited, and the secondary battery or the capacitor may be charged, for example, by connection to a commercial power source, or by non-contact power supply using reception of high-frequency energy by an antenna. It may be charged. Instead of such a configuration, the supply of power to the above-described units is based on the fact that power is supplied from an external device to the writing feature detection device 10 through an external terminal provided in the writing feature detection device 10. It may be done.

  The writing feature detection apparatus 10 may include other configurations in addition to the above-described units. For example, as described above, when the writing feature detection device 10 displays predetermined information on the display unit 12 according to the authentication result, the writing feature detection device 10 functions as an authentication result processing unit. It is only necessary to include a display element that displays a character or an image in response to an input of a control signal or display data from 20. In this case, the output of information such as a control signal and display data to the display element is a predetermined process performed by the control unit 20 in accordance with the authentication result.

[Configuration of signal output section]
The configuration of the signal output unit 50 will be described in detail with reference to FIGS.
As shown in FIG. 3, the signal output unit 50 includes a sensing element 65 including a plurality of sensing elements 60 arranged in a matrix. The plurality of sensing elements 60 are arranged below the writing region 11 and are arranged along the X direction that matches the X direction of the writing region 11 and the Y direction that matches the Y direction of the writing region. When the sensing element 60 receives pressure in the Z direction orthogonal to the X direction and the Y direction, it outputs a signal corresponding to the magnitude of the pressure. The plurality of sensing elements 60 are electrically connected for each column in the X direction and each column in the Y direction.

  In such a configuration, for example, columns in the X direction are sequentially selected by applying a voltage based on a control signal from the control unit 20, and a signal output from each column in the Y direction is detected each time a column in the X direction is selected. It is input to the control unit 20 as a signal for use. Based on the detection signal, the control unit 20 calculates the position in the X direction and the Y direction of the sensing element 60 that has received pressure in the Z direction, and the magnitude of the pressure received by the sensing element 60. Thereby, the writing trajectory and the writing pressure are obtained. Each of the sensing elements 60 arranged below each of the plurality of input positions where the writing operation is input corresponds to each of a plurality of points constituting the writing trajectory and the writing pressure.

  Note that, from the viewpoint of increasing the precision of the detectable writing locus, the plurality of sensing elements 60 are preferably arranged at a pitch of about 0.1 mm to 1 mm in the X direction and the Y direction.

The configuration of the sensing element 60 will be described with reference to FIGS. 4 and 5.
As shown in FIG. 4, the sensing element 60 includes a pressure-sensitive conductive change layer 61. The pressure-sensitive conductivity changing layer 61 includes a base material 62 and conductive particles 63 dispersed in the base material 62. The base material 62 is a pressure-sensitive material having a property that conductance changes according to an applied pressure, and is a material that exhibits isotropic conductivity with pressurization. The conductive particles 63 are nano-sized particles having higher conductivity than the base material 62. In the base material 62, the conductive particles 63 are dispersed with appropriate uniformity. As the base material 62, for example, a composite material of piezo fiber and resin is used. Alternatively, for example, silicon nitride, silicon carbide, or the like may be used as the base material 62, and carbon particles having conductivity different from the base material 62 may be used as the conductive particles 63.

  In the example shown in FIG. 4, the sensing element 60 includes a gap between two pressure-sensitive conductivity change layers 61A and 61B arranged in the Z direction, and the pressure-sensitive conductivity change layer 61A and the pressure-sensitive conductivity change layer 61B. S is provided, and a support 64 that supports these pressure-sensitive conductivity change layers 61A and 61B is provided. When pressure is applied to the sensing element 60 in the Z direction, the pressure-sensitive conductive change layer 61A and the pressure-sensitive conductive change layer 61B come into contact with each other, and a current flows through the sensing element 60.

  In the pressure-sensitive conductivity change layer 61 having the above-described configuration, when the base material 62 is compressed by pressing the pressure-sensitive conductivity change layer 61, the pressure-sensitive conductivity change layer 61 responds to the pressing force between the dispersed conductive particles 63. A corresponding amount of electrical conduction path is formed. As a result, the electrical resistance of the pressure-sensitive conductivity change layer 61 decreases as the pressing force increases. The relationship between the pressure applied to the pressure-sensitive conductivity changing layer 61 and the conductance of the pressure-sensitive conductivity changing layer 61 is linear, and the conductance of the sensing element 60 is applied to the sensing element 60 as shown in FIG. It increases linearly with increasing applied pressure. That is, the conductance of the sensing element 60 corresponding to each input position of the writing operation increases as the pressure applied to the input position increases.

  As a result, the greater the pressure applied to the sensing element 60, the greater the current flowing through the sensing element 60, and the greater the pressure applied to the input position, the greater the conductance of the sensing element 60 corresponding to that position. The sensing element 60 outputs a signal corresponding to the magnitude of the current flowing through the sensing element 60, and as a result, the signal output unit 50 detects that includes a signal corresponding to the magnitude of the conductance of each of the plurality of sensing elements 60. Output signal. Based on the detection signal output from the signal output unit 50, the control unit 20 creates a calculation formula or map that is created in advance based on the relationship between the pressure and conductance in the sensing element 60 and stored in the storage unit 30. Used to calculate the magnitude of the pressure received by the sensing element 60.

  Note that if the sensing element 60 includes two pressure-sensitive conductivity change layers 61A and 61B and a gap S is formed between the pressure-sensitive conductivity change layers 61A and 61B, the sensing element 60 receives pressure. When it is not, it is possible to prevent a weak current from flowing through the sensing element 60. Therefore, the detection accuracy of the writing trajectory and the writing pressure is improved, and the power consumption of the writing feature detection device 10 is also reduced. However, as long as such a weak current is suppressed by a switch element or the like, and the influence of the weak current is corrected by calculation of the control unit 20, the gap S may not be formed, and the sensing element 60 The number of the pressure-sensitive conductivity change layers 61 may be one.

[Action]
The effect | action which the writing characteristic detection apparatus 10 brings is demonstrated.
As described above, in the writing feature detection device 10, the signal output unit 50 includes the plurality of sensing elements 60 including the pressure-sensitive conductive change layer 61, and the signal output unit 50 is added to each sensing element 60. A signal including a signal corresponding to the magnitude of the conductance of the sensing element 60 that increases as the pressure increases is output as a detection signal. Then, the control unit 20 detects the writing locus and the writing pressure from the detection signal output by the signal output unit 50.

  Thus, the writing feature detection device 10 detects the writing locus and the writing pressure, and the detected writing locus and writing pressure are used for authentication of the user by the writing feature detection device 10 or an external device. Therefore, as compared with the conventional case where only the writing trajectory is used for authentication, the number of elements that are collated in the authentication process increases, so that the reliability of authentication is improved.

  In particular, since the conductance of the sensing element 60 increases linearly as the pressure applied to the sensing element 60 increases, it is easy to calculate the writing pressure and is constant regardless of the magnitude of the applied pressure. The writing pressure is calculated with the accuracy of. In particular, since the difference in pressure between a plurality of points constituting the writing trajectory can be calculated with a constant detection accuracy, when authentication is performed using the pressure distribution, it is related to the magnitude of the applied pressure. First, the distribution of pressure in the writing trajectory is accurately determined by the distribution of conductance in the plurality of sensing elements 60. Therefore, the reproducibility of determining each of a plurality of writing operations by the same person as a writing operation having the same characteristics is increased, and the accuracy of authentication is improved.

  Further, since the sensing element 60 can be formed to a thickness of about 30 μm to 200 μm, the writing feature detection device 10 having the sensing element 65 can be thinned. Therefore, the writing feature detection device 10 can be suitably applied to a card-type device that is required to contain components in a thin thickness.

As described above, according to the writing feature detection apparatus 10 of the present embodiment, the effects listed below can be obtained.
(1) A writing trajectory and a writing pressure are detected as information used for user authentication. If the writing trajectory and the writing pressure are used for authentication, the number of elements to be collated in the authentication process increases, so that the reliability of authentication is improved. Therefore, the writing feature detection apparatus 10 can detect information that can be authenticated with higher reliability as information used for user authentication.

  (2) Since the conductance of the sensing element 60 increases linearly with an increase in the pressure applied to the sensing element 60, that is, the pressure applied to the input position in the writing area 11, the writing pressure can be easily calculated. Further, the writing pressure is calculated with a certain accuracy regardless of the magnitude of the applied pressure. In particular, when authentication is performed using the pressure distribution, the pressure distribution in the writing trajectory is accurately obtained by the conductance distribution in the plurality of sensing elements 60 regardless of the magnitude of the applied pressure. , The accuracy of authentication is increased.

  (3) When the writing feature detection device 10 performs user authentication using the detected writing trajectory and writing pressure, the writing feature detection device 10 can perform authentication with high reliability. In addition, when the writing feature detection device 10 performs a predetermined process according to the result of user authentication performed using the detected writing locus and writing pressure, the security of the processing in the writing feature detection device 10 is enhanced. It is done.

  (4) Since the writing feature detection device 10 that detects the writing trajectory and the writing pressure using the sensing element 60 can be thinned, the writing feature detection device 10 is required to be thin. Even so, the requirements can be met exactly.

(Modification)
The above embodiment can be implemented with the following modifications.
The conductance of the sensing element 60 only needs to increase monotonically as the pressure applied to the sensing element 60 increases, and the manner of increase need not be linear. For example, if the reproducibility at the time of collation can be ensured, the conductance of the sensing element 60 may increase exponentially as the pressure applied to the sensing element 60 increases.

  In the above embodiment, the sensing elements 60 are arranged in a matrix, and a signal is output for each column in the X direction and the Y direction, thereby detecting the position where characters and the like are written in the X direction and the Y direction. However, the configuration capable of detecting the position in the X direction and the Y direction is not limited to the above configuration, and a known configuration can be applied.

  The control unit 20 that functions as a detection unit receives a detection signal corresponding to the input position of the writing operation from a pen-type device used when writing characters and the like, and the writing area 11 in which the characters and the like are written A detection signal corresponding to the magnitude of the pressure applied to the input position may be received from a device including the above, and the writing trajectory and the writing pressure may be detected based on these detection signals. In this case, the configuration for outputting the detection signal in the pen-type device and the configuration for outputting the detection signal in the device having the writing area 11 constitute a signal output unit.

  -The signal output part 50 which has the sensing element 65 may be provided in the pen-type writing instrument used for writing operation by a user. The sensing element 65 includes one sensing element 60, and the conductance of the sensing element 65 increases as the pressure applied to the tip of the writing instrument at the input position where the writing operation is input. The detection signal output from the signal output unit 50 is a signal corresponding to a plurality of input positions and the pressure applied to each of the input positions, and the writing instrument moves from a relatively set reference point. And a signal corresponding to the magnitude of conductance for each input position in the sensing element 65. The control unit 20 functioning as a detection unit is provided in the writing instrument together with the signal output unit 50, and may detect the writing trajectory and the writing pressure from the detection signal, or may be provided in a device different from the writing instrument. The writing trajectory and the writing pressure may be detected based on the detection signal received from the writing instrument.

  In the above embodiment, the sensing element 60 includes the pressure-sensitive conductive change layer 61 for each sensing element 60. Alternatively, the plurality of sensing elements 60 may include one pressure-sensitive conductive change layer 61. In this case, one pressure-sensitive conductivity change layer 61 is divided into a plurality of regions corresponding to a plurality of points constituting the writing trajectory and the writing pressure depending on the arrangement of the electrodes and the like. Each of the plurality of regions corresponds to each of the sensing elements 60.

  -In addition to the writing locus | trajectory and the writing pressure which the writing characteristic detection apparatus 10 detected for authentication of a user, other elements, such as a PIN code, may be used, for example. When the writing feature detection device 10 includes elements other than the sensing element 65, such as an element that outputs a signal corresponding to the input number to the control unit 20, a printing method or the like is used for such an element. Thus, it is preferably formed simultaneously with the sensing element 65.

  DESCRIPTION OF SYMBOLS 10 ... Written feature detection apparatus, 11 ... Writing area | region, 12 ... Display part, 20 ... Control part, 30 ... Memory | storage part, 40 ... Power supply part, 50 ... Signal output part, 60 ... Sensing element, 61 ... Pressure-sensitive conductivity change Layer, 62 ... base material, 63 ... conductive particles, 65 ... sensing element.

Claims (7)

A writing area that is an area where a writing operation is input by a user; a plurality of input positions that are positions in the writing area where the writing operation is input; and a magnitude of pressure applied to each of the input positions; A signal output unit that outputs a detection signal that is a signal according to
Based on the detection signal output by the signal output unit, as information used for authentication of the user, writing trajectories indicating the plurality of input positions and the magnitude of pressure applied to each of the input positions. A detection unit for detecting a writing pressure to be shown;
A writing feature detection device comprising:
The signal output unit is
A base material made of a pressure-sensitive material, the base material made of the pressure-sensitive material having a property that conductance changes according to pressure applied to the pressure-sensitive material, and a conductive material dispersed in the base material. A sensing element including a plurality of sensing elements, wherein the conductance of the sensing element corresponding to each of the input positions increases as the pressure applied to the input position increases. Having elements,
The detection signal includes a signal corresponding to the conductance of each of the plurality of sensing elements. For detection, which is a signal according to a plurality of input positions, which are positions where the writing operation is input, and the magnitude of pressure applied to each of the input positions, provided in a writing instrument used for a writing operation by a user A signal output unit for outputting a signal;
Based on the detection signal output by the signal output unit, as information used for authentication of the user, writing trajectories indicating the plurality of input positions and the magnitude of pressure applied to each of the input positions. A detection unit for detecting a writing pressure to be shown;
A writing feature detection device comprising:
The signal output unit is
A base material made of a pressure-sensitive material, the base material made of the pressure-sensitive material having a property that conductance changes according to pressure applied to the pressure-sensitive material, and a conductive material dispersed in the base material. A sensing element including a particle having a property, wherein the sensing element increases in conductance with an increase in pressure applied at the input position,
The detection signal includes a signal according to a conductance magnitude for each input position in the sensing element. The writing feature detection apparatus according to claim 1, wherein the conductance of the sensing element increases linearly with an increase in pressure applied to the input position. The writing feature detection apparatus according to claim 2, wherein the conductance of the sensing element increases linearly with an increase in pressure applied at the input position. An authentication unit that authenticates the user using the writing trajectory detected by the detection unit and the writing pressure;
The writing feature detection apparatus according to any one of claims 1 to 4, further comprising a storage unit that stores basic data that is collated with the writing locus and the writing pressure during the authentication by the authentication unit. The authentication result processing part which performs a predetermined | prescribed process further according to the result of the said user's authentication performed using the said writing locus | trajectory and the said writing pressure which the said detection part detected is any one of Claims 1-5. The writing feature detection apparatus according to one item. The writing feature detection device according to claim 1, wherein the writing feature detection device is a card-type device.

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