JPH10261088A - Unevenness information input device for finger and individual authenticating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a finger unevenness information input device and an individual authenticating device that are hardly affected by state variation of the surface of finger such as perspiration and can improve individual authenticating capability. SOLUTION: Linear output electrodes 23 are arranged at specific intervals along the length of a finger 22, a single input electrode 24 is arranged at end parts of the output electrodes 23 along the length of the finger 22, and the output of an oscillator 27, which outputs a signal of specific frequency (1MHz) is switched and connected in order to the output electrodes 23 by an analog switch group 25; and an electric signal obtained from the input electrode 24 is detected by a detecting circuit 29, whose output is converted into a digital signal by an A/D converter 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a finger unevenness information input device for inputting unevenness information as characteristic information of an individual finger, and a person or another person using the finger unevenness information input device. The present invention relates to a personal authentication device for performing personal authentication of a certain person.

[0002]

2. Description of the Related Art In recent years, there has been an increasing interest in a personal authentication apparatus for identifying and authenticating a person to be authenticated as an individual registered in advance for the purpose of entry / exit control of important facilities.

[0003] There are various methods for personal authentication. As a method of performing personal authentication using a pattern of the entire finger, for example, as disclosed in Japanese Patent Laid-Open No. 2-178777, an optical system of the entire finger is used. There is a method in which an image is fetched and collation is performed by using an addition signal obtained by adding pixel values of the image in a direction orthogonal to the longitudinal direction of the finger as characteristic information of the finger. However, in this method, since an optical system is required, there is a limit in downsizing the device.

In order to solve such a problem, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-168930, instead of using an optical system, a plurality of lines long in a direction orthogonal to the longitudinal direction of a finger are used. Using a linear electrode array in which linear electrodes are arranged at predetermined intervals along the longitudinal direction of the finger, the resistance value between adjacent linear electrodes when a finger is pressed on this linear electrode array is determined by the length of the finger. A method has been proposed in which signals sequentially read and synthesized in directions are used as characteristic information of a finger.

[0005]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No. 7-1
The personal authentication device disclosed in Japanese Patent No. 68930 is a method of extracting the characteristic information of a finger by measuring the surface electric resistance value (DC impedance) of a human finger and performing identity verification. In addition, there is a problem that the characteristic information of the obtained finger is affected by the state of the surface of the finger, and the personal authentication ability is reduced.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a finger unevenness information input device and a personal authentication device which are less susceptible to a change in the state of the finger surface such as sweating and which can improve the personal authentication capability.

[0007]

A finger unevenness information input device according to the present invention is arranged at predetermined intervals along the longitudinal direction of a finger, and a finger to which unevenness information is to be input is contacted along the arrangement direction. A plurality of output electrodes, an oscillator for outputting a signal of a predetermined frequency, connection means for sequentially switching and connecting the output of the oscillator to the plurality of output electrodes, and an end of the plurality of output electrodes along a longitudinal direction of a finger. A single input electrode which is disposed in the unit and is brought into contact with the finger together with the output electrode, and a detecting means for detecting an electric signal obtained from the input electrode.

[0008] Further, the finger irregularity information input device of the present invention comprises:
A plurality of output electrodes are arranged at predetermined intervals along the longitudinal direction of the finger, and a plurality of output electrodes are contacted with a finger to input unevenness information along the arrangement direction, and each output is connected to the plurality of output electrodes, A plurality of oscillators for outputting a signal of a predetermined frequency; control means for sequentially turning on and off each output of the plurality of oscillators; and a plurality of output electrodes disposed at ends of the fingers along a longitudinal direction of the finger, The apparatus includes a single input electrode with which the finger is brought into contact with the output electrode, and a detecting means for detecting an electric signal obtained from the input electrode.

Further, the finger unevenness information input device of the present invention comprises:
A plurality of input electrodes are arranged along the longitudinal direction of the finger at predetermined intervals, and a plurality of input electrodes to which a finger to be input irregularity information is contacted along the arrangement direction, and the plurality of input electrodes are arranged along the longitudinal direction of the finger. A single output electrode disposed at an end, the finger being in contact with the input electrode, an output connected to the output electrode, an oscillator for outputting a signal of a predetermined frequency, and a plurality of input electrodes. Reading means for sequentially reading each electrical signal to be read out, and detecting means for detecting the electrical signal read by the reading means.

Further, the finger unevenness information input device according to the present invention comprises:
A plurality of output electrodes are arranged at predetermined intervals along the longitudinal direction of the finger of the subject, and a plurality of output electrodes to which a finger to be input irregularity information is contacted along the arrangement direction, and an oscillator that outputs a signal of a predetermined frequency Connecting means for sequentially switching and connecting the output of the oscillator to the plurality of output electrodes, a single input electrode provided so that a part of the body of the subject can be contacted, and electricity obtained from the input electrode. Detection means for detecting a signal.

[0011] The finger irregularity information input device according to the present invention comprises:
A plurality of input electrodes are arranged along the longitudinal direction of the subject's finger at predetermined intervals, and a plurality of input electrodes to which a finger to input unevenness information is contacted along the arrangement direction, and a part of the subject's body is A single output electrode arranged so as to be able to contact, an output connected to this output electrode, an oscillator for outputting a signal of a predetermined frequency,
A reading unit for sequentially reading each electric signal obtained from the plurality of input electrodes; and a detecting unit for detecting the electric signal read by the reading unit.

Further, the personal identification device of the present invention is arranged at predetermined intervals along the longitudinal direction of the finger, and includes a plurality of output electrodes to which the finger to be verified of the subject is contacted along the arrangement direction. An oscillator that outputs a signal of a predetermined frequency, connection means for sequentially switching and connecting the output of the oscillator to the plurality of output electrodes, and an end disposed along a longitudinal direction of a finger of the plurality of output electrodes, A single input electrode with which the finger is brought into contact with the output electrode, a detecting means for detecting the electric signal obtained from the input electrode to obtain characteristic information of the finger to be verified of the person to be authenticated, A storage unit for storing characteristic information for comparison, and by comparing characteristic information obtained by the detection unit with characteristic information stored in the storage unit, the authenticated person or another person can be identified. Determine if there is It has and a constant section.

Further, the personal identification device of the present invention is arranged at predetermined intervals along the longitudinal direction of the finger, and includes a plurality of output electrodes with which the finger to be verified is contacted along the arrangement direction. A plurality of oscillators each having an output connected to the plurality of output electrodes and outputting a signal of a predetermined frequency; control means for sequentially controlling on and off of each output of the plurality of oscillators; A single input electrode, which is disposed at an end along the longitudinal direction of the finger and in which the finger is brought into contact with the output electrode, detects an electric signal obtained from the input electrode, thereby verifying a person to be authenticated. Detecting means for obtaining characteristic information of a finger to be detected, storing means for storing characteristic information to be compared in advance, and comparing characteristic information obtained by the detecting means with characteristic information stored in the storing means. By doing before And it comprises a determining means for determining a person or a person to be authenticated himself.

Further, the personal identification device of the present invention is arranged at predetermined intervals along the longitudinal direction of the finger, and is provided with a plurality of input electrodes with which a finger to be verified is contacted along the arrangement direction. A single output electrode disposed at the end of the plurality of input electrodes along the longitudinal direction of the finger, the finger being brought into contact with the input electrode, and an output connected to the output electrode; An oscillator for outputting a signal, reading means for sequentially reading each electric signal obtained from the plurality of input electrodes, and characteristic information of a finger to be verified of the person to be authenticated by detecting the electric signal read by the reading means. Detecting means for obtaining characteristic information to be compared, storage means for storing characteristic information for comparison in advance, and matching the characteristic information obtained by the detecting means with the characteristic information stored in the storage means, thereby obtaining the target information. The certifier himself And it comprises a determining means for determining whether a person.

[0015] According to the present invention, information on the unevenness of the finger can be obtained by the impedance due to the capacitive coupling between the finger and the electrode. Can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment will be described. FIG. 1 schematically shows the configuration of the personal authentication device according to the first embodiment. This device is
As will be described later, a pattern input unit 1 for receiving a one-dimensional pattern (projection signal) V (i) of the entire finger caused by a difference in the distance between the finger and the output electrode. A control unit 2 for performing overall control and a projection signal (characteristic information for collation) of each finger of the person to be authenticated are written and registered in an IC card 4 as a storage means, or conversely, an IC card A read / write device 3 for reading a projection signal (characteristic information to be compared) registered from a card 4
Consists of

The host machine 5 controls, for example, the opening and closing of doors of important facilities and the sounding of an alarm buzzer in response to a control signal from the control unit 2. Note that the control target of the host machine 5 differs depending on the security system to which the present device is applied.

The IC card 4 is configured, for example, as shown in FIG. That is, a control element (for example, CPU) 11 as a control unit, a non-volatile data memory 12 whose storage content is erasable, a working memory 13, a program memory 14, and electrical contact with the read / write device 3 are obtained. And a contact portion 15. Of these, the portion within the broken line (control element 11,
The data memory 12, the working memory 13, and the program memory 14) are configured by one (or a plurality) of IC chips and are embedded in the IC card body.

The data memory 12 is used for storing various data, and is composed of, for example, an EEPROM. In this example, the data memory 12 stores a projection signal (characteristic information for collation) of the finger of each person to be authenticated, and the like.

The working memory 13 is a memory for temporarily storing processing data and the like when the control element 11 performs processing, and is composed of, for example, a RAM. The program memory 14 is, for example, a mask ROM
And the like, and stores a processing program of the control element 11 and the like.

The pattern input unit 1 is configured, for example, as shown in FIG. In other words, reference numeral 21 denotes a linear electrode array, which includes a plurality of linear output electrodes 23,...
Are arranged at predetermined intervals along the longitudinal direction. The interval between the output electrodes 23 is, for example, about 1/10 mm. In addition, the number of the output electrodes 23, that is, the length of the finger 22 of the linear electrode array 21 in the longitudinal direction is usually a length including the second joint completely from the tip of the finger 22.

At the end of the linear electrode array 21 along the longitudinal direction of the finger 22, there is a single electrode 22 which is longer in the direction orthogonal to the longitudinal direction of the finger 22 and whose width in the longitudinal direction is longer than the output electrode 23. Of input electrodes 24 are provided.

Each output electrode 23 is connected to one end of an analog switch group 25. The analog switch group 25 is sequentially turned on and off by the timing pulse output from the timing pulse generator 26.

The other ends of the analog switch group 25 are commonly connected, and this common connection point is connected to the output of the oscillator 27. In this example, the oscillation frequency of the oscillator 27 is set to, for example, 1 MHz (megahertz).

The input electrode 24 is connected to a ground point via a terminating resistor 28 and to an input of a detection circuit 29. The output of the detection circuit 29 is input to the A / D converter 30. The A / D converter 30 performs A / D conversion in accordance with the timing pulse output from the timing pulse generator 26.
Perform the conversion.

In such a configuration, a finger 22 to be collated is pressed on the linear electrode array 21 in a direction perpendicular to the electrode arrangement direction. At this time, the analog switch group 25 is switched in the length direction of the finger 22, and the output of the oscillator 27 is sequentially connected to each output electrode 23. Based on this,
The output of the output electrode 23 is received by the input electrode 24 and the termination resistance 2
8 is detected by the detection circuit 29 at the both ends of A.
The signal is converted into a digital signal by the / D converter 30.

The timing pulse generator 26 generates a signal (pulse) for controlling the switching of the analog switch group 25 and the sampling timing of the A / D converter 30. The signal is, for example, as shown in FIG. 4, and switches the analog switch group 25 at the falling edge of the signal.
At the rising edge, the A / D converter 30 converts the digital signal.

The signal V (i) thus obtained can be expressed by the following equation. V (i) = R * Vo / (Z (i) + Zf + Zc) In the above equation, R is the impedance of the terminating resistor 28, V
o is the amplitude of the output voltage of the oscillator 27, Z (i) is the impedance between the i-th output electrode 23 and the finger 22 due to the capacitive coupling, Zf is the impedance of the finger 22 itself, and Zc is the finger 22 due to the capacitive coupling. And the input electrode 24.

FIG. 5 shows a side view when the finger 22 is placed on the linear electrode array 21 and a signal V (i) obtained at that time. In the figure, where the finger 22 and the output electrode 23 are in close contact with each other, as in the part (a), the capacitive coupling between the finger 22 and the output electrode 23 becomes strong, and the impedance Z (i) becomes In order to be small, the signal V (i) in that portion takes a large value.

Conversely, (b) lateral wrinkles near the first joint, (c)
1) and (c2), like the side wrinkles near the second joint,
In a portion where the finger 22 and the output electrode 23 are not in close contact with each other, the capacitive coupling between the finger 22 and the output electrode 23 is weakened, and the impedance Z (i) is increased. Takes a small value.

Therefore, the signal V (i) has a steep dip in that portion. That is, the signal V (i) is
This means that two pieces of unevenness information are provided. Hereinafter, this signal V (i) is referred to as a projection signal (feature information).

In such an input method, when the finger 22 and the output electrode 23 are in contact with each other, the influence of the contact electric resistance between the finger 22 and the electrode 23 appears on the impedance Z (i). Although the influence of the state of the surface of the finger 22 cannot be removed, the output frequency of the oscillator 27 is set to be high (for example, set to 1 MHz), so that the impedance due to the capacitive coupling is sufficiently lower than the contact electric resistance. be able to. Therefore, the finger 2
The fluctuation of the projection signal V (i) due to the change of the state 2 can be suppressed low, and a stable signal can always be obtained.

Next, the flow of processing in the above configuration will be described. The processing is roughly classified into two types, “registration” and “collation”. First, the registration process will be described with reference to the flowchart shown in FIG.

First, in step S 1, the projection signal V (i) of the finger 22 is captured using the pattern input unit 1. Next, in step S2, the projection signal V captured in step S1
(i) is converted to dictionary information (that is, characteristic information for collation) Vd (i)
Is stored (registered) in the data memory 12 in the IC card 4. This completes the registration process.

Next, the matching process will be described with reference to the flowchart shown in FIG. First, step S3
, The projection signal V of the finger 22 using the pattern input unit 1
(i) Incorporate. Next, in step S4, step S3
A comparison calculation is performed between the fetched projection signal V (i) and the dictionary information Vd (i) stored in the data memory 12 in the IC card 4.

This collation calculation is realized by calculating the difference E according to the following procedure. First, Equations 1 and 2 below
And the dictionary information Vd (i) read from the IC card 4 using
And the projection signal V (i) obtained from the input finger image. In this case, the sum of the square error between Vd (i) and V (i + m) shifted by m over a certain range is defined as S (m). In the following equations 1 and 2,
N is the number of elements of V (i).

[0037]

(Equation 1)

[0038]

(Equation 2)

S (m) thus obtained is V (i + m) and Vd
This is a parameter indicating the degree of coincidence with (i), and the smaller the value of S (m), the more coincident. The alignment is
When m is changed within a certain range, M when the value of S (m) becomes the smallest is referred to as a positional deviation amount, and it is assumed that the position is adjusted at this M. Next, the dissimilarity E is calculated using the following Expressions 3 and 4. In the following equations 3 and 4, N
Is the number of elements of V (i).

[0040]

(Equation 3)

[0041]

(Equation 4)

E in the above equations (3) and (4) is obtained by summing the square error between the aligned input signal V (i + M) and the dictionary information Vd (i) over a certain range. This is normalized by the sum of squares of the information Vd (i). E is
Aligned input signal V (i + M) and dictionary information Vd (i)
The greater the value of E, the greater the difference between them, and the smaller the value, the more similar the two.

Next, at step S5, the degree of difference E obtained as described above is determined by using a predetermined threshold TH.
If [E ≦ TH], the process proceeds to step S6, where the person to be authenticated is determined to be the person himself, and the process ends.

If not [E ≦ TH] in step S5, it is determined that they do not match, and step S7
To determine that the person to be authenticated is another person and end the process. After the above collation processing is completed, the control unit 2 sends the result of the identification of the person / other to the host machine 5. The host machine 5 performs processing according to the result of the determination, for example, releasing the door when the person is determined to be the person, and sounding an alarm buzzer when the person is determined to be another person. These processes differ depending on the security system to which the present device is applied.

Next, a second embodiment will be described. The configuration of the personal authentication device according to the second embodiment, the flow of the registration process, and the flow of the collation process are the same as those of the first embodiment, and thus the description thereof will be omitted. FIG. 8 shows the configuration of the pattern input unit 1 which is a different part.

In the first embodiment, a single input electrode 2
4 are arranged at the ends of the plurality of output electrodes 23, but the present invention is not limited to this arrangement method.
Reference numeral 4 only needs to be in contact with a part of the body of the subject. Therefore, in the second embodiment, for example, as shown in FIG. 8, the input electrode 24 is arranged on a plurality of output electrodes 23 so as to place a finger 22a different from the finger 22 to be collated. It is. Even in this case, the same operation and effect as those of the first embodiment can be obtained.

Next, a third embodiment will be described. The configuration of the personal authentication device according to the third embodiment, the flow of the registration process, and the flow of the collation process are the same as those of the first embodiment, and thus the description thereof is omitted. FIG. 9 shows the configuration of the pattern input unit 1 which is a different part.

In the first embodiment, one oscillator 27
Is switched by the analog switch group 25 and the output electrode 2
3 are connected to the output electrodes 23. In the third embodiment, oscillators 271, 272,... Are connected to the respective output electrodes 23, and the outputs of the oscillators 271, 272,. On / off control is performed by a pulse. Even in this case, the same operation and effect as those of the first embodiment can be obtained.

Next, a fourth embodiment will be described. The configuration of the personal authentication device according to the fourth embodiment, the flow of registration processing, and the flow of collation processing are the same as those of the first embodiment, and a description thereof will be omitted. FIG. 10 shows the configuration of the pattern input unit 1 which is a different part.

In the first embodiment, there are a plurality of output electrodes 23 and one input electrode 24. In the fourth embodiment, one output electrode 23 is provided and a plurality of input electrodes 24 are provided. That is, the configuration of the output electrode 23 and the input electrode 24 is opposite to the configuration of the first embodiment.

The output of the oscillator 27 is connected to the output electrode 23. The plurality of input electrodes 24 are connected to an analog switch group 25.
Are sequentially connected to the terminating resistor 28, the potential difference generated at both ends of the terminating resistor 28 is detected by the detection circuit 29, and is converted into a digital signal by the A / D converter 30.

Also in this case, since the unevenness information of the finger 22 is also measured by the strength and difference of the capacitive coupling, it is not affected by the state of the surface of the finger 22 (such as the presence or absence of perspiration). A stable projection signal can be obtained.

Next, a fifth embodiment will be described. The configuration of the personal authentication device according to the fifth embodiment, the registration process, and the flow of the collation process are the same as those of the first embodiment, and a description thereof will be omitted. FIG. 11 shows the configuration of the pattern input unit 1 which is a different part.

In the fourth embodiment, a single output electrode 2
3 are arranged at the ends of the plurality of input electrodes 24, but the present invention is not limited to this arrangement method.
3 only needs to be in contact with a part of the body of the person to be authenticated. Therefore, in the fifth embodiment, for example, as shown in FIG. 11, the output electrode 23 is arranged on a plurality of input electrodes 24 so as to place a finger 22a different from the finger 22 to be collated. It is. Even in this case, the same operation and effect as those of the fourth embodiment can be obtained.

Next, a sixth embodiment will be described. The configuration of the personal authentication device according to the sixth embodiment, the flow of the registration process, and the flow of the collation process are the same as those of the first embodiment, and a description thereof will be omitted. FIG. 12 shows the configuration of the pattern input unit 1 which is a different part.

In the first embodiment, the output of the input electrode 24 is received by the terminating resistor 28, and the voltage at both ends is detected by the detection circuit 2
9 was detected. In the sixth embodiment,
A BPF (Band Pass Filter) 31 is connected to the input side of the detection circuit 29 as band limiting means having the oscillation frequency of the oscillator 27 as a pass band. Thus, external noise can be removed, and a more stable projection signal can be obtained.

Next, a seventh embodiment will be described. The configuration of the personal authentication device according to the seventh embodiment, the flow of the registration process, and the flow of the collation process are the same as those of the third embodiment, and a description thereof will be omitted. FIG. 13 shows the configuration of the pattern input unit 1 which is a different part.

In the third embodiment, the output of the input electrode 24 is received by the terminating resistor 28, and the voltage at both ends is detected by the detection circuit 2
9 was detected. In the seventh embodiment,
A BPF (bandpass filter) 31 having an oscillation frequency of the oscillator 27 in a pass band is connected to an input side of the detection circuit 29. Thus, external noise can be removed, and a more stable projection signal can be obtained.

Next, an eighth embodiment will be described. The configuration of the personal authentication device according to the eighth embodiment, the flow of the registration process, and the flow of the collation process are the same as those of the fourth embodiment, and a description thereof will be omitted. FIG. 14 shows the configuration of the pattern input unit 1 which is a different part.

In the fourth embodiment, the output of the analog switch group 25 is received by the terminating resistor 28, and the voltage at both ends is detected by the detection circuit 29. In the eighth embodiment, a BPF (bandpass filter) 3 having an oscillation frequency of an oscillator 27 in a pass band is provided on the input side of a detection circuit 29.
1 are connected. Thus, external noise can be removed, and a more stable projection signal can be obtained.

Next, a ninth embodiment will be described. In the first to eighth embodiments, both the output electrode 23 and the input electrode 24 are exposed. In the ninth embodiment, as shown in FIG. 15, the output electrode 23 and the input electrode 24 are electrically connected. It is covered with an insulator thin film 32 as an insulator. FIG. 15 is a side view when the finger 22 is placed on the linear electrode array 21 and a signal V (i) obtained at that time.
Is shown.

As described above, when the output electrode 23 and the input electrode 24 are covered, since the output electrode 23 and the input electrode 24 and the finger 22 are connected only by the electrostatic coupling, the finger 22 and the electrode 23, 24 is infinite. Therefore, a more stable projection signal V (i) can be obtained without being affected by a change in the state of the surface of the finger 22 such as sweating.

In FIG. 15, both the output electrode 23 and the input electrode 24 are covered, but a configuration in which only the output electrode 23 is covered and only the input electrode 24 is covered is also possible.
Next, a tenth embodiment will be described.

In the first to ninth embodiments, the output electrode 2
The shape of each of the input electrodes 3 and the input electrodes 24 was linear, and they were arranged in a one-dimensional array. In the tenth embodiment,
For example, as shown in FIG. 16 or FIG. 17, the output electrode 23 and the input electrode 24 are respectively formed in a plurality of rectangular electrodes, and these are arranged in a matrix. This makes it possible to capture unevenness information such as a fingerprint of a finger as an image (two-dimensional information).

As described above, according to the above-described embodiment, the information on the unevenness of the finger can be obtained by the impedance due to the capacitive coupling between the finger and the electrode. It is hard to be affected, and more stable unevenness information can be obtained, and the personal authentication ability can be improved. In addition, by covering the electrode with the insulating thin film, more stable unevenness information that is not affected by the change in the state of the finger surface can be obtained.

[0066]

As described above in detail, according to the present invention, there is provided a finger unevenness information input device and a personal authentication device which are less susceptible to changes in the state of the finger surface such as sweating and which can improve the personal authentication ability. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a personal authentication device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of an IC card.

FIG. 3 is a block diagram schematically showing a configuration of a pattern input unit.

FIG. 4 is a diagram for explaining a control timing chart by a timing pulse.

FIG. 5 is a side view when a finger is placed on the pattern input unit,
FIG. 4 is a waveform diagram of a projection signal obtained at that time.

FIG. 6 is a flowchart illustrating a registration process.

FIG. 7 is a flowchart illustrating a collation process.

FIG. 8 is a block diagram showing a configuration of a pattern input unit of the personal authentication device according to the second embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a pattern input unit of a personal authentication device according to a third embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a pattern input unit of a personal authentication device according to a fourth embodiment of the present invention.

FIG. 11 is a block diagram showing a configuration of a pattern input unit of a personal authentication device according to a fifth embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a pattern input unit of a personal authentication device according to a sixth embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a pattern input unit of a personal authentication device according to a seventh embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of a pattern input unit of a personal authentication device according to an eighth embodiment of the present invention.

FIG. 15 is a side view of the ninth embodiment of the present invention when a finger is placed on the pattern input unit, and a waveform diagram of a projection signal obtained at that time.

FIG. 16 is a block diagram illustrating an electrode arrangement example of a pattern input unit according to a tenth embodiment of the present invention.

FIG. 17 is a block diagram illustrating another example of the electrode arrangement of the pattern input unit according to the tenth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pattern input part, 2 ... Control part, 3 ... Read / write part, 4 ... IC card (storage means), 5 ... Host machine, 11 ... Control element, 12 ... Data memory, 13 …
... working memory, 14 ... program memory, 15
... contact part 21 ... linear electrode array, 22 ...
Finger, 23 ... output electrode, 24 ... input electrode, 25 ... analog switch group, 26 ... timing pulse generator,
27 oscillator 28 termination resistor 29 detector circuit 30 A / D converter 31 bandpass filter (band limiting means) 32 insulator thin film (electric insulator) .

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Moto Kurihara 70 Yanagicho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture

Claims (14)

[Claims] 1. A plurality of output electrodes arranged at predetermined intervals along a longitudinal direction of a finger of a subject to be measured, and a plurality of output electrodes to which a finger to be input with unevenness information is contacted along the arrangement direction, and a signal of a predetermined frequency. An oscillator for sequentially outputting and connecting the output of the oscillator to the plurality of output electrodes; and a connecting means disposed at an end of the plurality of output electrodes along a longitudinal direction of the finger, wherein the finger outputs the output. A finger unevenness information input device, comprising: a single input electrode that is brought into contact with an electrode; and a detection unit that detects an electric signal obtained from the input electrode. 2. A plurality of output electrodes which are arranged at predetermined intervals along the longitudinal direction of the finger of the person to be measured and which are in contact with a finger to which irregularity information is to be input along the arrangement direction; A plurality of oscillators each having an output connected to the electrode and outputting a signal of a predetermined frequency; control means for sequentially turning on and off each output of the plurality of oscillators; A single input electrode disposed at an end along the input electrode, the finger being in contact with the output electrode, and detection means for detecting an electric signal obtained from the input electrode. Unevenness information input device. 3. A plurality of input electrodes arranged along the longitudinal direction of the finger of the subject at predetermined intervals, and a plurality of input electrodes to be contacted by a finger to input unevenness information along the arrangement direction; A single output electrode disposed at a longitudinal end of a finger of the electrode, the finger being in contact with the input electrode, and an output connected to the output electrode to output a signal of a predetermined frequency And a reading unit for sequentially reading each electric signal obtained from the plurality of input electrodes; and a detecting unit for detecting the electric signal read by the reading unit. 4. The apparatus according to claim 1, further comprising a band limiting unit provided on an input side of said detection unit, having an oscillation frequency of said oscillator in a pass band, and limiting a band of an input electric signal. An unevenness information input device for a finger according to any one of 1, 2, and 3. 5. The device according to claim 1, wherein at least one of the output electrode and the input electrode is covered with an electrical insulator. Finger unevenness information input device. 6. An output electrode or an input electrode arranged at a predetermined interval along the longitudinal direction of a finger of a subject is divided into a plurality of electrodes in a direction orthogonal to the longitudinal direction of the finger of the subject. 4. An arrangement according to claim 1, wherein
4. The finger unevenness information input device according to any one of items 4 and 5. 7. A plurality of output electrodes arranged at predetermined intervals along the longitudinal direction of the finger of the subject to be measured, and a plurality of output electrodes to be contacted with a finger to which irregularity information is to be input along the arrangement direction; An oscillator for sequentially outputting and connecting the output of the oscillator to the plurality of output electrodes; a single input electrode arranged so that a part of the body of the subject can be contacted; A detection means for detecting an electric signal obtained from the electrode; and a finger unevenness information input device, comprising: 8. A plurality of input electrodes which are arranged at predetermined intervals along the longitudinal direction of the subject's finger and which are in contact with a finger to be input with unevenness information along the arrangement direction; A single output electrode arranged so that a part of the body can be contacted, an output connected to the output electrode, an oscillator for outputting a signal of a predetermined frequency, and an electric signal obtained from the plurality of input electrodes. A finger unevenness information input device, comprising: reading means for sequentially reading; and detecting means for detecting an electric signal read by the reading means. 9. A plurality of output electrodes arranged at predetermined intervals along the longitudinal direction of the finger of the person to be authenticated, the output electrodes contacting the finger to be verified of the person to be authenticated along the arrangement direction, An oscillator for outputting a signal; connecting means for sequentially switching and connecting the output of the oscillator to the plurality of output electrodes; and A single input electrode that is brought into contact with the output electrode; a detection unit that obtains characteristic information of a finger to be verified by detecting an electric signal obtained from the input electrode; A storage unit for storing information; and comparing the characteristic information obtained by the detection unit with the characteristic information stored in the storage unit to determine whether the user is the authenticated person or another person. Determining means for determining Personal authentication apparatus characterized by Bei was. 10. A plurality of output electrodes arranged at predetermined intervals along the longitudinal direction of the finger of the person to be authenticated, and a plurality of output electrodes to be contacted with a finger to be verified of the person to be authenticated along the arrangement direction; A plurality of oscillators each connected to the output electrode and outputting a signal of a predetermined frequency; control means for sequentially turning on and off each output of the plurality of oscillators; and a longitudinal direction of a finger of the plurality of output electrodes A single input electrode, which is disposed at an end along which the finger is in contact with the output electrode, and detects an electric signal obtained from the input electrode, thereby detecting the finger to be verified of the person to be authenticated. Detection means for obtaining characteristic information, storage means for storing characteristic information to be compared in advance, and comparing the characteristic information obtained by the detection means with the characteristic information stored in the storage means, The person to be authenticated A personal identification device, comprising: a determination unit configured to determine whether the user is another person. 11. A plurality of input electrodes arranged at predetermined intervals along the longitudinal direction of the finger of the person to be authenticated, and a plurality of input electrodes contacted with a finger to be verified of the person to be authenticated along the arrangement direction; A single output electrode disposed at a longitudinal end of a finger of the input electrode, the finger being in contact with the input electrode, and an output connected to the output electrode to output a signal of a predetermined frequency An oscillator; reading means for sequentially reading each electric signal obtained from the plurality of input electrodes; and detecting means for detecting characteristic information of a finger to be verified of a person to be authenticated by detecting the electric signal read by the reading means. And storage means for storing feature information for verification in advance, and by comparing the feature information obtained by the detection means with the feature information stored in the storage means, Whether or not A personal identification device comprising: a determination unit that determines: 12. The apparatus according to claim 1, further comprising a band limiting means provided on an input side of said detecting means, having an oscillation frequency of said oscillator in a pass band, and limiting a band of an input electric signal. Any one of 9, 10, and 11
The personal authentication device described in (1). 13. The device according to claim 9, wherein at least one of the output electrode and the input electrode is covered with an electrical insulator. Personal authentication device. 14. An output electrode or an input electrode arranged at a predetermined interval along the longitudinal direction of a finger of a person to be authenticated,
10. The device according to claim 9, wherein the plurality of fingers are arranged in a direction orthogonal to the longitudinal direction of the finger of the subject.
The personal authentication device according to any one of 1, 12, and 13.