JP2006318485A - Fingerprint data creating device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fingerprint data creating device reducing the scale of hardware and returning an abnormal state to a normal state only when something abnormal occurs due to discharge of static electricity. <P>SOLUTION: A fingerprint data creating device 1 is provided with; a creation part, when the fingerprint of a user touches a contact part, detecting the fingerprint of the user and, when the fingerprint of the user is detected, creating fingerprint image data for identifying the user; an abnormality detecting part 14, when the fingerprint of the user is detected by the creation part, detecting the abnormal state where the creation part is not normally operated at present; and a second control part 12, when the abnormality is detected by the abnormal detecting part 14, controlling the creation part to operate normally at present. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention detects the user's fingerprint when the user's fingerprint is in contact with the contact portion provided at a position where the user's fingerprint can be contacted, and when the user's fingerprint is detected, The present invention relates to a fingerprint data generation device and a program for generating fingerprint data for authenticating a user.

  Conventionally, there is user fingerprint image data as authentication data for authenticating a user. In the apparatus for generating the fingerprint image data, the fingerprint is first detected when the user's finger is first brought into contact with the contact portion, for example. Then, after the fingerprint is detected, the fingerprint image data of the user is generated.

  Here, when the user brings a fingerprint into contact with the contact part, static electricity charged to the user may be discharged to each part in the apparatus through the contact part. Due to this discharge, there has been a problem that fingerprint detection operation and fingerprint image data generation operation cannot be performed normally. Therefore, in order to solve this problem, there have been the following techniques.

  FIG. 6 is a diagram for explaining the concept of the first prior art. In the first prior art, the user contacts the fingerprint with the discharge sheet 2100 before bringing the fingerprint into contact with the contact portion 2000 (FIG. 6A). Thereby, the static electricity charged to the user is discharged to the discharge sheet 2100. Thereafter, the user slides the discharge sheet 2100 and then makes a fingerprint contact with the contact portion 2000 (see FIG. 6B, for example, Patent Document 1). In this prior art, static electricity charged to the user is not discharged to each part in the fingerprint data generating apparatus. However, since it is necessary to provide a discharge sheet in the fingerprint data generation apparatus, there are problems that the hardware scale of the apparatus increases and the cost of the apparatus increases.

  In the second prior art, an electrostatic bypass circuit is provided on the surface of the contact portion. When the user's fingerprint is brought into contact with the contact portion, static electricity charged to the user flows through the bypass circuit (see, for example, Patent Document 2). However, in this technique, the static electricity flows to the ground of the contact portion, and therefore the potential of the ground of the contact portion may rise and fall momentarily. In such a case, static electricity charged to the user is discharged to each part in the apparatus via the contact part.

  Therefore, in the third conventional technique, the following technique is disclosed. Due to the above-described discharge, values necessary for the fingerprint data generation apparatus to perform the fingerprint detection operation may be rewritten. For this reason, in the fingerprint data generation device, for example, the CPU rewrites the necessary value to a normal value at regular intervals (see, for example, Patent Document 3).

In addition, due to the above-described discharge, latch-up may occur in electronic components constituting each part in the fingerprint data generation device. In order to prevent this latch-up, conventionally, for example, a normal voltage is supplied to each electronic component at regular intervals.
JP 2002-123821 A JP 2001-141411 A JP-A-11-99252

  However, the third prior art described above has the following problems. In the third prior art, for example, the CPU performs an operation of rewriting the necessary value to a normal value at regular intervals. In this case, in the fingerprint data generating apparatus, there is a case where the rewriting operation is performed even though there is no abnormality due to the discharge, and the number of rewriting operations is increased. As a result, for example, there is a problem that the life of the CPU that performs various operations is shortened.

  In addition, regardless of whether or not an abnormality has occurred, if the latch-up measures are taken periodically, there are the following problems. As a latch-up countermeasure, for example, the power supply unit temporarily stops the supply of voltage to each electronic component. Thereafter, the power supply unit supplies a normal voltage to each electronic component. In this case, it takes a certain time until the voltage supplied to each electronic component is stabilized by the power supply unit. The fingerprint detection operation is not performed while the above-described latch-up countermeasure is being performed. As a result, there has been a problem that the time for fingerprint detection is reduced.

  In such a case, these problems can be solved if the abnormality can be restored to normal only when an abnormality due to discharge occurs. Therefore, conventionally, it has been desired to develop a fingerprint data device that can restore an abnormality to normal only when an abnormality occurs due to discharge due to static electricity.

  An object of the present invention is to provide a fingerprint data generation apparatus and program capable of reducing an abnormality to normal only when an abnormality occurs due to discharge due to static electricity while reducing the hardware scale.

  In order to solve the above-described problem, the first feature of the present invention is that when the user's fingerprint is brought into contact with a contact portion provided at a position where the user's fingerprint can be contacted, the user's fingerprint. When the fingerprint of the user is detected, the fingerprint data generation device has a generation unit that generates fingerprint data for authenticating the user, and the generation unit detects the fingerprint of the user. If detected, an abnormality detecting means for detecting an abnormal state in which the generating means will not operate normally at present or in the future, and if an abnormal state is detected by the abnormality detecting means, the generating means Or it has a control means which controls to operate normally in the future.

  The second feature of the present invention is that when the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the image data of the fingerprint is acquired and acquired. Fingerprint detection means for detecting a fingerprint based on the image data; and fingerprint data generation means for generating fingerprint data for authenticating the user when the fingerprint detection means detects a fingerprint; A fingerprint data generation device comprising a register for storing an acquisition accuracy value indicating an accuracy with which the fingerprint detection unit acquires the image data, which is determined so that the fingerprint detection unit can detect a fingerprint. The detection means acquires the acquisition accuracy value from the register at every leading timing of a certain period until fingerprint detection, and when the user's fingerprint is in contact with the contact portion, Based on the acquisition accuracy value, the image data of the fingerprint contacted with the contact portion is acquired, and the fingerprint is detected based on the acquired image data. After acquiring the acquisition accuracy value from the register, when the user's fingerprint is detected during the predetermined period from the predetermined head timing, the acquisition accuracy value is stored from the storage device that stores the acquisition accuracy value. An acquisition unit for acquiring, an acquisition accuracy value acquired by the acquisition unit, and an acquisition accuracy value stored in the register are compared to determine whether or not they match, and an abnormality detection unit that detects that they do not match And when the abnormality detection means detects that they do not match, the acquisition accuracy value held in the register is stored in the register during the predetermined period from the predetermined head timing. It is characterized in that it has a rewriting means for rewriting the acquisition accuracy values obtained by obtained means.

  According to a third aspect of the present invention, when the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the user's fingerprint is detected and the use is performed. A fingerprint data generation device having a generation unit that generates fingerprint data for authenticating the user when a fingerprint of a person is detected, the generation unit including a plurality of electronic components, and the generation Supply means for supplying each electronic component with a power supply voltage within an allowable range necessary for normal operation of the means, and when the user's fingerprint is detected by the generation means, the plurality of electronic components Among these, an abnormality detection means for detecting that a power supply voltage supplied to at least one electronic component is outside the allowable range, and a power supply voltage supplied to the at least one electronic component by the abnormality detection means is within the allowable range. Outside If it is detected that the power supply voltage is not supplied to the at least one electronic component, the power supply voltage is supplied to the at least one electronic component within an allowable range. Supply control means for controlling, and control means for controlling the generation means to operate normally when a power supply voltage within an allowable range is supplied to the at least one electronic component. is there.

  The first program of the present invention is characterized by causing a computer to function as the fingerprint data generating apparatus of the second feature of the present invention. The second program of the present invention is characterized by causing a computer to function as the fingerprint data generating apparatus of the third feature of the present invention.

  According to the features of the present invention, the hardware scale can be reduced, and the abnormality can be restored to normal only when the abnormality occurs due to discharge due to static electricity.

  The fingerprint data generation apparatus of the present invention detects a user's fingerprint when the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, and detects the user's fingerprint. The generation unit that generates fingerprint data for authenticating the user, and the generation unit is in a state where it does not operate normally or in the future when the generation unit detects the fingerprint of the user. An abnormality detection unit that detects an abnormal state and a control unit that controls the generation unit to operate normally at present or in the future when an abnormality state is detected by the abnormality detection unit.

  In Embodiment 1 to be described later, when the abnormality detection unit detects an abnormal state in which the generation unit will not normally operate in the future, and the abnormality detection unit detects an abnormal state, It is an explanation when the control unit controls to operate. Here, the generation unit described above corresponds to the sensor unit 10, the first control unit 11, the second control unit 12, and the control register 16 of the first embodiment. The abnormality detection unit described above corresponds to the abnormality detection unit 14 of the first embodiment, and the control unit described above corresponds to the second control unit 12 of the first embodiment.

  In the second embodiment to be described later, when the abnormality detection unit detects an abnormal state in which the generation unit does not normally operate normally, and the abnormality detection unit detects the abnormal state, the generation unit is currently normal. It is an explanation when the control unit controls to operate. Here, the generation unit described above corresponds to the sensor unit 10, the first control unit 11, the second control unit 12, and the control register 16 of the second embodiment. The abnormality detection unit described above corresponds to the abnormality detection unit 14 of the first embodiment, and the control unit described above corresponds to the second control unit 12 of the first embodiment.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration of a fingerprint data generation system according to the present embodiment. The fingerprint data generation system includes a fingerprint data generation device 1 and a storage device 2. The fingerprint data generation device 1 includes a sensor unit 10, a first control unit 11, a second control unit 12, an abnormality detection unit 14, and a control register 16.

  In the present embodiment, the sensor unit 10 and the control register 16 are configured to be affected by static electricity due to discharge, and the first control unit 11, the second control unit 12, and the abnormality detection unit 14 are It is configured not to be affected by static electricity due to discharge. The 1st control part 11, the 2nd control part 12, and the abnormality detection part 14 are comprised by CPU, for example. The sensor unit 10, the first control unit 11, and the second control unit 12 are not only a fingerprint detection unit but also a fingerprint data generation unit.

  The sensor unit 10 has a contact part (not shown) provided at a position where a user's fingerprint can be contacted. The sensor unit 10 holds the first measurement accuracy value sent from the first control unit 11. After that, when the first measurement accuracy value is sent from the first control unit 11, the sensor unit 10 rewrites the newly sent first measurement accuracy value. And when a user's fingerprint contacts the contact part, the sensor part 10 acquires the 1st fingerprint image data of the said fingerprint based on a 1st measurement accuracy value.

  For example, the contact unit is provided with a detection unit (not shown) that detects whether or not an object has contacted. And when this detection part detects that the thing contacted, the fact is notified to the sensor part 10. Based on the above, the sensor unit 10 performs an operation of acquiring the first fingerprint image data.

  The sensor unit 10 includes an electrode unit (not shown) arranged so as to have a predetermined distance from the contact unit. Then, the sensor unit 10 measures capacitance data between the finger that is in contact with the contact unit and the electrode unit. At this time, the sensor unit 10 measures capacitance data based on the first measurement accuracy value sent from the first control unit 11. The first measurement accuracy value (acquisition accuracy value) is a value determined so that the second control unit 12 (fingerprint detection unit) can detect a fingerprint, and the sensor unit 10 (fingerprint detection unit) It is a value indicating the accuracy of measuring the capacitance data (accuracy of acquiring the first fingerprint image data). The sensor unit 10 acquires the measured capacitance data as first fingerprint image data. Then, the sensor unit 10 sends the acquired first fingerprint image data to the second control unit 12.

  In addition, the sensor unit 10 acquires the instruction information sent from the first control unit 11 and the second measurement accuracy value. The instruction information means that the sensor unit 10 instructs to measure capacitance data based on the second measurement accuracy value. The second measurement accuracy value is defined as follows, for example. The capacitance data measured by the sensor unit 10 based on the second measurement accuracy value is image data having quality that becomes fingerprint image data for authentication for authenticating the user. The sensor unit 10 acquires capacitance data measured based on the second measurement accuracy value as second fingerprint image data. Then, the sensor unit 10 sends the acquired second fingerprint image data to the second control unit 12.

  The control register 16 stores the first measurement accuracy value. In addition, the second measurement accuracy value is stored in the control register 16 from when the second control unit 12 detects the fingerprint until the second fingerprint image data is generated. The first measurement accuracy value and the second measurement accuracy value stored in the control register 16 are discharged when a rewrite instruction is sent from the second control unit 12 or when a fingerprint is brought into contact with the contact portion. It will not be changed except when there is an impact.

  The first control unit 11 has a counter function. Then, the first control unit 11 acquires a first measurement accuracy value from the control register 16 at every leading timing of a certain period until fingerprint detection is performed. And the 1st control part 11 sends the acquired 1st measurement accuracy value to the sensor part 10 for every timing of the head of a fixed period. For example, when the time t1 is the head timing of a certain period and the certain period is T, the control unit performs time t1, time t1 + T, time t1 + 2T. . . At the timing, the first measurement accuracy value is acquired from the control register 16. Information about the timing at which the first control unit 11 acquires the first measurement accuracy value from the control register 16 is sent to the second control unit 12 and the abnormality detection unit 14.

  Then, after the second control unit 12 detects the fingerprint, the first control unit 11 performs the first measurement accuracy at every leading timing of a certain period until the second fingerprint image data is generated. Do not take action to get the value. Instead, the first control unit 11 acquires the second measurement accuracy value from the control register 16 when acquiring the fingerprint detection signal from the second control unit 12. Then, the first control unit 11 sends the second measurement accuracy value and instruction information for instructing to acquire the second fingerprint image data to the sensor unit 10 based on the second measurement accuracy value.

  When the first control unit 11 acquires a signal indicating that the second fingerprint image data has been generated from the second control unit 12, the first control unit 11 receives a signal from the control register 16 until a fingerprint is detected. The first measurement accuracy value is acquired at each head timing.

For example, when the time when the first control unit 11 acquires the signal indicating that the second fingerprint image data has been generated is between the time t1 + 2T and the time t1 + 3T, the first control unit 11 performs the timing at the time t1 + 3T. The first measurement accuracy value is acquired from the control register 16, and thereafter, the first measurement accuracy value is acquired from the control register 16 every period T until fingerprint detection is performed. Information about the timing at which the first control unit 11 acquires the first measurement accuracy value from the control register 16 is sent to the second control unit 12 and the abnormality detection unit 14.

  The second control unit 12 detects a fingerprint based on the first fingerprint image data acquired by the sensor unit 10. The specific operation of the second control unit 12 is as follows.

The second control unit 12 holds reference data that is fingerprint image data when a finger is in contact with the contact portion. Then, the second control unit 12 acquires the first fingerprint image data sent from the sensor unit 10. If the second control unit 12 determines that the difference between the first fingerprint image data sent from the sensor unit 10 and the reference data is within a predetermined value, the second control unit 12 detects the fingerprint. This predetermined value is determined based on the first fingerprint image data acquired when a plurality of fingerprints are touched.

  Further, the second control unit 12 holds the second measurement accuracy value. Then, the second control unit 12 performs the following operation when the fingerprint is detected. The second control unit 12 stores the second measurement accuracy value in the control register 16. However, the second control unit 12 stores the second measurement accuracy value in the control register 16 after the control register 16 is affected by the discharge. That is, the second measurement accuracy value stored in the control register 16 is not changed due to the discharge until it is acquired by the first control unit 11.

  At this time, the first measurement accuracy value stored in the control register 16 is stored as it is. Then, the second control unit 12 sends a fingerprint detection signal indicating that the fingerprint has been detected to the first control unit 11.

  Then, the second control unit 12 to which the second fingerprint image data is sent from the sensor unit 10 causes the storage device 2 to store the second fingerprint image data as authentication fingerprint image data. Then, the second control unit 12 erases the second measurement accuracy value stored in the control register 16. Then, the second control unit 12 sends a signal indicating that the second fingerprint image data has been generated to the first control unit 11.

  Further, the second control unit 12 has a counter function synchronized with the counter of the first control unit 11. Then, after the first control unit 11 obtains the first measurement accuracy value from the control register 16 at a predetermined start timing, the second control unit 12 receives the user's When the fingerprint is detected, the second control unit 12 (acquisition unit) performs the following processing. The second control unit 12 acquires the first measurement accuracy value from the storage device 2 that stores the first measurement accuracy value. The specific operation of the second control unit 12 is as follows. For example, after the first control unit 11 acquires the first measurement accuracy value from the control register 16 at a predetermined start timing (for example, time t1 + 2T), the second control unit 12 starts from the predetermined start timing. It is assumed that the user's fingerprint is detected during a certain period (between time t1 + 2T and time t1 + 3T).

  In this case, the second control unit 12 performs the following operation during the predetermined period (for example, from time t1 + 2T to time t1 + 3T). The second control unit 12 accesses the storage device 2 that stores the first measurement accuracy value. Then, the second control unit 12 acquires the first measurement accuracy value from the storage device 2. Then, the second control unit 12 once holds the first measurement accuracy value. Then, the second control unit 12 sends the acquired first measurement accuracy value and an instruction signal instructing to perform the abnormality detection operation to the abnormality detection unit 14.

  When the second control unit 12 detects the user's fingerprint, the abnormality detection unit 14 includes the first measurement accuracy value stored in the control register 16 and the first measurement accuracy value stored in the storage device 2. Are compared to determine whether or not they match, and a mismatch is detected. The specific operation of the abnormality detection unit 14 is as follows.

  The abnormality detection unit 14 has a counter function synchronized with the counter of the second control unit 12. And the abnormality detection part 14 acquires the time when the said instruction | indication signal was sent. And the abnormality detection part 14 performs the following operation | movement during the said fixed period (for example, between time t1 + 2T and time t1 + 3T). The abnormality detection unit 14 acquires the first measurement accuracy value from the control register 16. Then, the first measurement accuracy value acquired from the control register 16 is compared with the first measurement accuracy value stored in the storage device 2 to determine whether or not they match. If the abnormality detection unit 14 determines that they do not match, the abnormality detection unit 14 detects an abnormal state indicating that they do not match. Then, the abnormality detection unit 14 sends an abnormal signal indicating an abnormal state to the second control unit 12. On the other hand, when the abnormality detection unit 14 determines that they match, the abnormality detection unit 14 sends a normal signal indicating the match to the second control unit 12.

  The second control unit 12 accesses the control register 16 when acquiring an abnormality signal from the abnormality detection unit 14. Then, the second control unit (rewriting unit) 12 holds the first measurement accuracy value stored in the control register 16 during the fixed period (for example, from the time t1 + 2T to the time t1 + 3T). 1 measurement accuracy value (first measurement accuracy value acquired from the storage device 2) is rewritten. On the other hand, when the second control unit 12 acquires a normal signal from the abnormality detection unit 14, the rewriting operation described above is not performed.

  The storage device 2 stores the first measurement accuracy value. The storage device 2 is not affected by electric discharge even when a fingerprint is brought into contact with the contact portion.

  In the present embodiment, it is assumed that the finger is in contact with the contact portion from when the fingerprint is detected until the second fingerprint image data is generated. However, the second control unit 12 may acquire the first fingerprint image data from the sensor unit 10 at regular intervals. Then, the second control unit 12 may perform the following processing assuming that the finger is not touching when the first fingerprint image data changes suddenly before the second fingerprint image data is generated. The second control unit 12 erases the second measurement accuracy value stored in the control register 16. Then, the second control unit 12 may send an instruction signal for instructing the first control unit 11 to acquire the first measurement accuracy value at each head timing of a certain period.

  In addition, after the first control unit 11 described above acquires the first measurement accuracy value from the control register 16 at a predetermined start timing, the second control unit 12 uses the predetermined measurement from the predetermined start timing during a certain period. When the person's fingerprint is detected, the second control unit 12 acquires the first measurement accuracy value from the storage device 2 at the timing of the end of the fixed period from the start timing, and obtains the first measurement accuracy value and the instruction signal. You may make it send to the abnormality detection part 14. FIG. And the abnormality detection part 14 may be made to perform abnormality detection operation | movement at the timing of the end of a fixed period from the said head timing. Then, at the timing from the start timing to the end of the fixed period, the second control unit 12 converts the first measurement accuracy value stored in the control register 16 into the first measurement accuracy value stored in the storage device 2. You may make it rewrite to.

(Operation)
An example of the operation of the fingerprint data generation apparatus 1 when the user brings a fingerprint into contact with the sensor unit 10 will be described below. FIG. 2 is a flowchart for explaining the operation. In this operation, it is assumed that after the user's fingerprint is detected, the user's finger is in contact with the contact portion until the second fingerprint image data (authentication fingerprint data) is generated.

  First, the first control unit 11 reads the first control register 16 from the control register 16 at every start timing (time t1 + T, time t1 + 2T...) Of the fixed period T until the fingerprint detection is performed by the second control unit 12. The measurement accuracy value is acquired. And the 1st control part 11 sends the acquired 1st measurement accuracy value to the sensor part 10 for every head timing of the fixed period T. FIG. Then, it is assumed that the user touches the contact portion with the fingerprint at a timing between time t1 + T and time t1 + 2T. Information about the timing at which the first control unit 11 acquires the first measurement accuracy value from the control register 16 is sent to the second control unit 12 and the abnormality detection unit 14.

  The sensor unit 10 measures the capacitance data between the finger that is in contact with the contact unit and the electrode unit based on the held first measurement accuracy value, and obtains it as first fingerprint image data ( S10). The sensor unit 10 sends the acquired first fingerprint image data to the second control unit 12. The second controller 12 detects a fingerprint based on the stored reference data and the first fingerprint image data (S20). Then, the second control unit 12 sends a fingerprint detection signal to the first control unit 11. Then, the second control unit 12 writes the second measurement accuracy value in the control register (S25).

  And the 1st control part 11 stops operation which acquires the 1st measurement accuracy value for every timing of the head of a fixed period. Then, the first control unit 11 acquires the second measurement accuracy value from the control register (S30). Then, the first control unit 11 sends to the sensor unit 10 a second measurement accuracy value and an instruction signal that instructs to measure the capacitance data based on the second measurement accuracy value (S40). The sensor unit 10 measures capacitance data based on the second measurement accuracy value, and obtains it as second fingerprint image data (S45). Then, the second fingerprint image data is sent to the second control unit 12. The second control unit 12 stores the second fingerprint image data as authentication fingerprint image data in the storage device 2 (S50). Then, the second control unit 12 erases the second measurement accuracy value stored in the control register 16. Then, the second control unit 12 sends to the first control unit 11 that the second fingerprint image data has been generated. The first control unit 11 acquires the first measurement accuracy value from the control register 16 at the beginning of a certain period until the fingerprint is detected (S60). At this time, information about the timing at which the first control unit 11 acquires the first measurement accuracy value from the control register 16 is sent to the second control unit 12 and the abnormality detection unit 14.

  The following operations are also performed in parallel with the operations from S25 to S60 described above. The second control unit 12 stands by until a predetermined time before the time t1 + 2T (S70). The predetermined time is a time required for the second control unit 12 to perform a rewrite operation after acquiring the first measurement accuracy value from the storage device 2.

  Then, the second control unit 12 acquires the first measurement accuracy value from the storage device 2 (S80). Then, the second control unit 12 sends the acquired first measurement accuracy value and an instruction signal instructing to perform the abnormality detection operation to the abnormality detection unit 14.

  The abnormality detection unit 14 acquires the first measurement accuracy value stored in the control register 16 when the first measurement accuracy value and the instruction information are acquired. Then, the abnormality detection unit 14 compares the first measurement accuracy value stored in the control register 16 with the first measurement accuracy value stored in the storage device 2 and determines whether or not they match ( S100).

If it is determined that they do not match, the abnormality detection unit 14 detects an abnormal state indicating that they do not match, and sends an abnormal signal to the second control unit 12 (S110). On the other hand, if it is determined that they match, the abnormality detection unit 14 sends a normal signal indicating that they match to the second control unit 12 (S120).

  When the second control unit 12 acquires an abnormality signal from the abnormality detection unit 14, the first measurement accuracy value stored in the control register 16 is acquired from the first measurement accuracy value (stored from the storage device 2). The first measurement accuracy value is rewritten (S130). When the second control unit 12 acquires a normal signal from the abnormality detection unit 14, the second control unit 12 does not perform a rewrite operation (S140). This rewriting operation is performed until time t1 + 2T.

  (Effect) According to the present embodiment, the first control unit 11 (fingerprint detection unit) controls the control register at every head timing of a certain period until the second control unit 12 detects a fingerprint. 16, the first measurement accuracy value (acquisition accuracy value) is acquired. The sensor unit 10 (fingerprint detection unit) obtains the first fingerprint image data of the fingerprint contacted with the contact unit based on the first measurement accuracy value when the user's fingerprint is contacted with the contact unit. . And the 2nd control part 12 detects a fingerprint based on the acquired 1st fingerprint image data.

Here, when a user's fingerprint is detected within a certain period from a predetermined head timing, the second control unit 12 acquires a first measurement accuracy value from the storage device 2. Then, the abnormality detection unit 14 compares the first measurement accuracy value stored in the control register 16 with the first measurement accuracy value stored in the storage device 2 to determine whether or not they match. Detect not. Then, when it is detected that they do not match, the second control unit 12 stores the first measurement accuracy value stored in the control register 16 in the storage device 2 during a certain period from the predetermined head timing. The first measurement accuracy value is rewritten.

  When the user's fingerprint is brought into contact with the contact portion, electrostatic discharge may occur in the fingerprint data generation device 1. In this case, the value of the first measurement accuracy value stored in the control register 16 that is a device having a low withstand voltage may be changed. In such a case, the changed first measurement accuracy value will be sent to the sensor unit 10 in the future. Therefore, when acquiring the first fingerprint image data in the future, the sensor unit 10 acquires the first fingerprint image data based on the changed first measurement accuracy value. As a result, the first fingerprint image data when the fingerprint is not in contact with the contact portion may be sent to the second control unit 12. In such a case, it can be said that the fingerprint detection unit will not be able to perform the fingerprint detection operation normally in the future. As a result, it can be said that the fingerprint data generation unit cannot normally perform the fingerprint data generation operation in the future.

  The abnormality detection unit 14 of the present embodiment can detect that the first measurement accuracy value stored in the control register 16 has been changed. This change can be said to be an abnormal state in which the fingerprint detection unit and the fingerprint data generation unit (that is, the generation unit) will not operate normally in the future. For this reason, the abnormality detection unit 14 can detect an abnormal state in which the fingerprint detection unit and the fingerprint data generation unit will not normally operate in the future.

  Then, the second control unit 12 converts the first measurement accuracy value stored in the control register 16 into the first measurement accuracy value (normal) stored in the storage device 2 during a certain period from the predetermined head timing. 1st measurement accuracy value) can be rewritten. As a result, the first control unit 11 can change the first control unit 16 from the control register 16 in the future (for example, from the predetermined start timing to the start timing of the next period after a certain period (or the start timing of the subsequent period)). Until the measurement accuracy value is obtained, the first measurement accuracy value in the control register is rewritten to the normal first measurement accuracy value. Then, the first control unit 11 sends the normal first measurement accuracy value to the sensor unit 10, so that the sensor unit 10 can acquire the first fingerprint image data based on this. Also, the second control unit 12 can normally detect the fingerprint based on the sent first fingerprint image data. For this reason, it can be said that the 2nd control part 12 controls so that a fingerprint detection part may operate | move normally in the future. As a result, it can be said that the second controller 12 controls the fingerprint data generator to operate normally in the future.

  Further, in the present embodiment, the second control unit 12 controls the fingerprint detection unit and the fingerprint data generation unit to operate normally in the future only when the abnormality detection unit 14 detects an abnormal state. For this reason, the fingerprint data generation device 1 of the present embodiment performs control to return the abnormal state to the normal state only when an abnormal state due to electrostatic discharge (change of the first measurement accuracy value of the control register 16) occurs. It can be carried out. In addition, the fingerprint data generating apparatus 1 of the present embodiment does not require a configuration like a discharge sheet, so the hardware scale is reduced.

  That is, according to the present invention, the abnormality detection means detects an abnormal state (state where the generation means will not operate normally at present or in the future) due to electrostatic discharge generated by the user's fingerprint touching the contact portion. be able to. And a control means can control so that a production | generation means may operate | move normally now or in the future.

  For this reason, the present invention can perform control (operation related to discharge countermeasures) to return the abnormal state to the normal state only when the abnormal state is detected. As a result, according to the present invention, it is not necessary to periodically perform an operation related to discharge countermeasures as in the prior art, and for example, it is possible to prevent a reduction in time during which fingerprint detection can be performed. In addition, according to the present invention, since it is not necessary to provide a configuration like a discharge sheet, the hardware scale of the fingerprint data generation device can be reduced.

  Note that when an electronic component having a high electrostatic withstand voltage is used for the sensor unit 10, the sensor unit 10 is not physically broken even when static electricity is applied to the sensor unit 10. However, even in such a case where the value of the first measurement accuracy value stored in the control register 16 may change, the fingerprint data generation device 1 of the present embodiment is effective.

Embodiment 2. FIG.
FIG. 3 is a diagram illustrating a configuration of the fingerprint data generation device 1 according to the second embodiment. In the present embodiment, the same components as those shown in the fingerprint data generation system of the first embodiment are denoted by the same reference numerals. The description of the same functions as those of the components shown in the fingerprint data generation system of the first embodiment will be omitted. The present embodiment is different from the first embodiment in that the function of the second control unit 12, the function of the abnormality detection unit 14, the supply unit 18 and the display unit 20 are provided.

  In the present embodiment, the sensor unit 10 and the control register 16 are configured to be affected by static electricity due to discharge, and the first control unit 11, the second control unit 12, the abnormality detection unit 14, and the supply unit 18. The display unit 20 is configured not to be affected by static electricity due to discharge. The 1st control part 11, the 2nd control part 12, and the abnormality detection part 14 are comprised by CPU, for example, the supply part 18 is comprised by the power supply part, and the display part 20 is comprised by the display etc. ing.

  Each of the sensor unit 10 and the control register 16 includes a plurality of electronic components.

This electronic component is, for example, a C-MOS-IC. The supply unit 18 supplies a power supply voltage within an allowable range necessary for the sensor unit 10 to perform a normal operation to a plurality of electronic components constituting the sensor unit 10. The supply unit 18 supplies a power supply voltage within an allowable range necessary for the control register 16 to perform a normal operation to a plurality of electronic components constituting the control register 16. The supply unit 18 supplies a power supply voltage necessary for each unit in the fingerprint data generation apparatus 1 to operate normally. Here, as an example, the range of the power supply voltage within the allowable range supplied to each electronic component constituting the sensor unit 10 and the control register 16 is X1 to X2.

  When the second control unit 12 detects a user's fingerprint, the abnormality detection unit 14 is supplied to at least one of the plurality of electronic components constituting the sensor unit 1 and the control register 16. Detects that the power supply voltage is outside the allowable range. The specific operation of the abnormality detection unit 14 is as follows. The abnormality detection unit 14 holds the power supply voltage range X1 to X2 within the allowable range described above. And the abnormality detection part 14 will perform the following operation | movement, if the fingerprint detection signal which shows that the fingerprint was detected from the 2nd control part 12 is acquired. The abnormality detection unit 14 measures the power supply voltage value supplied to each electronic component constituting the sensor unit 10 and each electronic component constituting the control register 16. However, the abnormality detection unit 14 measures the power supply voltage value at a timing after a predetermined time has elapsed after acquiring the fingerprint detection signal. The predetermined time is a time from when the abnormality detection unit 14 acquires the fingerprint detection signal to when the power supply voltage value supplied to each electronic component changes.

  As an example, the abnormality detection unit 14 may measure the power supply voltage value at the final timing of a certain period. For example, when the abnormality detection unit 14 acquires a fingerprint detection signal and the time when a predetermined time has elapsed is between time t1 + 2T and time t1 + 3T, the abnormality detection unit 14 sets the power supply voltage value at the timing of time t1 + 3T. You may make it measure.

  Then, the abnormality detection unit 14 determines whether or not the power supply voltage value supplied to at least one of the electronic components constituting the sensor unit 10 and the control register 16 is outside the allowable range. Then, the abnormality detection unit 14 detects that the power supply voltage value supplied to at least one electronic component is outside the allowable range and is in an abnormal state.

  For example, the abnormality detection unit 14 determines whether or not the power supply voltage value supplied to each electronic component is in the power supply voltage range X1 to X2 within the allowable range described above. And the abnormality detection part 14 detects that it is in an abnormal state, when the power supply voltage value supplied to at least one electronic component is not in the power supply voltage range X1 to X2 within the allowable range. Then, the abnormality detection unit 14 sends an abnormality detection signal indicating an abnormal state and an electronic component signal indicating the at least one electronic component to the second control unit 12.

  When acquiring the abnormality detection signal and the electronic component signal, the second control unit 12 performs the following processing. The second control unit 12 (supply control unit) controls the supply unit 18 not to supply a power supply voltage to the at least one electronic component. The supply unit 18 is controlled not to supply a power supply voltage to the at least one electronic component. Thereafter, the second control unit 12 controls the supply unit 18 to supply a power supply voltage within an allowable range to the at least one electronic component.

  If the second control unit 12 determines that the power supply voltage within the allowable range is supplied to the at least one electronic component, the second control unit 12 controls the generation unit to perform normal operation at present. Specifically, the second control unit 12 acquires the first measurement accuracy value from the storage device 2 and writes it in the control register 16. Then, the second control unit 12 sends the initial value data necessary for the sensor unit 10 to normally perform the operation of acquiring the fingerprint image data and the first measurement accuracy value to the sensor unit 10. Thereby, the sensor unit 10 (generation unit) is controlled so that the acquisition operation of the first fingerprint image data can be normally performed. Further, the second control unit 12 (generation unit) can normally detect the fingerprint based on the first fingerprint image data. For this reason, it can be said that the 2nd control part 12 controls so that a fingerprint detection part (generation part) may operate normally now. In addition, when the second measurement accuracy value is currently sent, the sensor unit 10 can normally acquire the second fingerprint image data, so the second control unit 12 includes the fingerprint data generation unit ( It can be said that the generator is controlled so as to operate normally.

  Thereafter, the second control unit 12 instructs the first control unit 11 to acquire the first measurement accuracy value from the control register 16 at each head timing of a certain period. Note that the timing at which the generation unit is currently controlled to perform normal operation may be, for example, the timing of time t1 + nT (n is an integer). When the control operation is finished, the second control unit 12 displays on the display unit 20 an instruction to instruct the user's fingerprint to be in contact with the contact unit.

(Operation)
An example of the operation of the fingerprint data generation apparatus 1 when the user brings a fingerprint into contact with the sensor unit 10 will be described below. FIG. 4 is a flowchart for explaining the operation. In this operation, after the user's fingerprint is detected, the user's finger is in contact with the contact portion until the second fingerprint image data is generated.

  First, the first control unit 11 acquires the first measurement accuracy value from the control register 16 at every head timing of the fixed period T (time t1 + T, time t1 + 2T...). Then, the first control unit 11 sends the acquired first measurement accuracy value to the sensor unit 10. Here, the timing at which the abnormality detection unit 14 measures the power supply voltage value is time t1 + nT (n is an integer), and the timing at which the generation unit is currently controlled to perform normal operation is time t1 + nT (n is A description will be given of the case of (integer) timing.

  And the process of step S10, S20 shown in a figure is performed. At this time, in step S <b> 20, the second control unit 12 sends a fingerprint detection signal to the abnormality detection unit 14.

  Then, the abnormality detection unit 14 determines whether the time when a predetermined time has elapsed from the time when the fingerprint detection signal is acquired is the timing of time t1 + nT (n is an integer) (S200). If it is determined that it is not the above timing, the process proceeds to step S200. When the abnormality detection unit 14 determines that it is the above timing, the abnormality detection unit 14 performs the following processing. The abnormality detection unit 14 determines whether or not the power supply voltage supplied to at least one electronic component among the plurality of electronic components constituting the sensor unit 10 and the control register 16 is outside the allowable range (S220).

  If the abnormality detection unit 14 determines that the power supply voltage value supplied to at least one electronic component is outside the allowable range, the abnormality detection unit 14 detects an abnormal state (S230). Then, the abnormality detection unit 14 sends an abnormality detection signal indicating an abnormal state and an electronic component signal indicating the at least one electronic component to the second control unit 12 (S240). Thereafter, the process proceeds to step S260.

  On the other hand, when the abnormality detection unit 14 determines that the power supply voltage values supplied to the respective electronic components are all within the allowable range, the abnormality detection unit 14 sends a normal signal indicating the normal state to the second control unit 12. (S250). Thereafter, the processing from step S25 to S60 is performed.

  When acquiring the abnormality detection signal and the electronic component signal, the second control unit 12 performs the following processing. The second control unit 12 controls the supply unit 18 not to supply a power supply voltage to the at least one electronic component. The supply unit 18 is controlled not to supply a power supply voltage to the at least one electronic component. Thereafter, the second control unit 12 controls the supply unit 18 to supply a power supply voltage within an allowable range to the at least one electronic component (S260). Since the process in step S260 is the same as the conventional latch-up countermeasure process, detailed description thereof is omitted.

  If the second control unit 12 determines that a power supply voltage within an allowable range is supplied to the at least one electronic component, the second control unit 12 controls the generation unit (such as a fingerprint detection unit) to perform a normal operation (S270). At this time, if the current time is before the time t1 + nT (n is an integer) (n is an integer), the second control unit 12 waits until the timing of the time t1 + nT (n is an integer). Then, the second control unit 12 controls the generation unit (such as a fingerprint detection unit) to perform a normal operation when time t1 + nT (n is an integer) is reached.

  When the control operation is finished, the second control unit 12 displays on the display unit 20 an instruction to instruct the user's fingerprint to be in contact with the contact unit (S280). The display unit 20 executes the above instruction. And the process from step S10 to step S60 is performed.

  In addition, discharge by static electricity arises by the process of step S10 when a user contacts a contact part for the first time with a fingerprint. Thereby, it can be said that the static electricity charged to the user was almost discharged. Then, it can be said that the amount of static electricity flowing to each part in the fingerprint data generating apparatus 1 is small due to discharge due to static electricity in the process of step S10 when the same user next makes a contact with the fingerprint. For this reason, when the same user next touches the contact portion with the fingerprint, it can be said that the power supply voltage value supplied to each electronic component is hardly outside the allowable range. For this reason, in the present embodiment, after the process of step S280, the process of step S10 to step S60 is performed, but the process of step S200 to step S280 is not performed.

(Function and effect)
According to the present embodiment, when a fingerprint of a user is detected, the abnormality detection unit 14 supplies power to at least one electronic component among the electronic components constituting the sensor unit 10 and the control register 16. Detect that the voltage is out of tolerance. When the abnormality detection unit 14 detects that the power supply voltage supplied to at least one electronic component is outside the allowable range, the second control unit 12 performs the following processing. The second control unit 12 controls the supply unit 18 not to supply a power supply voltage to the at least one electronic component, and then supplies a power supply voltage within an allowable range to the at least one electronic component. Control. Then, the second control unit 12 controls the generation unit to operate normally when a power supply voltage within an allowable range is supplied to the at least one electronic component.

  When electrostatic discharge occurs in the fingerprint data generation apparatus 1, latch-up may occur in the electronic components of the control register 16 and the sensor unit 10, which are devices with low withstand voltage. The abnormality detection unit 14 described above can detect the occurrence of latch-up that has occurred in the electronic components of the control register 16 and the sensor unit 10.

Since the fingerprint detection unit and the fingerprint data generation unit cannot currently operate normally due to the occurrence of latch-up, the abnormality detection unit 14 has the generation unit (fingerprint detection unit and fingerprint data generation unit) currently normal. It can be said that the abnormal state which stops working can be detected.

  Then, as a latch-up countermeasure process, the second control unit 12 controls the supply unit 18 not to supply a power supply voltage to the at least one electronic component, and then the at least one electronic component is within an allowable range. The power supply voltage is controlled to be supplied.

  Then, when a power supply voltage within an allowable range is supplied to the at least one electronic component, the second control unit 12 writes a normal first measurement accuracy value in the control register 16, for example. In addition, the second control unit 12 sends information necessary for the sensor unit 10 to operate and the first measurement accuracy value to the sensor unit 10. Thereby, the sensor part 10 can acquire 1st fingerprint image data normally, and the 2nd control part 12 can detect a fingerprint normally based on the 1st fingerprint image data. For this reason, it can be said that the 2nd control part 12 controls so that a fingerprint detection part (generation part) may operate normally now. In addition, when the second measurement accuracy value is currently sent, the sensor unit 10 can normally acquire the second fingerprint image data, so the second control unit 12 includes the fingerprint data generation unit ( It can be said that the generator is controlled so as to operate normally.

  In the present embodiment, the second control unit 12 can control the generation unit to operate normally only when the abnormality detection unit 14 detects an abnormal state.

For this reason, the fingerprint data generation device 1 according to the present embodiment is in an abnormal state due to electrostatic discharge (a state where the power supply voltage supplied to each electronic component constituting the control register 16 and the sensor unit 10 is out of the allowable range). Only when this occurs, it is possible to perform control to return the abnormal state to the normal state. In addition, since the fingerprint data generating apparatus 1 of the present embodiment does not require a configuration like a discharge sheet, the hardware scale is reduced.

(Modification)
Note that the first measurement accuracy value stored in the control register 16 may be changed even when the user's fingerprint is brought into contact with the contact portion and latch-up due to discharge does not occur. In response to this change, in order to rewrite the first measurement accuracy value to a normal value, the above-described second embodiment may be modified as follows.

  The abnormality detection unit 14 and the second control unit 12 of the modification also have the function of the first embodiment. And in the flowchart figure shown in Embodiment 2, it deform | transforms as follows. After step S250, the processing from step S25 to S140 may be performed. Further, after the display process of step S280, the processes of steps S10 to S140 may be performed.

(program)
In addition, a computer (for example, a PC device) can perform the operation of the fingerprint data generation device 1 according to the first embodiment by executing the first program. This computer has the functions of a hard disk for storing the first program, an input unit (not shown) having the function of the sensor unit 10, the first control unit 11, the second control unit 12, and the abnormality detection unit 14. A CPU (not shown) and a memory (not shown) having the function of the control register 16 are included. The CPU can access an external storage device (not shown) having the function of the storage device 2. The hard disk and CPU are devices with high electrostatic withstand voltage that are not affected by static electricity due to discharge. On the other hand, the memory and the input unit are devices with low electrostatic withstand voltage that are affected by static electricity due to discharge. According to such a first program, it is possible to easily realize the fingerprint data generation apparatus 1 having the operational effects shown in the first embodiment with a general general-purpose computer.

  In addition, the computer (for example, PC) can perform the operation of the fingerprint data generation apparatus 1 according to the second embodiment by executing the second program. The computer includes a hard disk for storing a second program, an input unit having a function of the sensor unit 10, an output unit (not shown) having a function of the display unit 20, a first control unit 11, and a second control. A CPU having the functions of the unit 12 and the abnormality detection unit 14, a memory having the function of the control register 16, and a power supply unit (not shown) having the function of the supply unit 18. The hard disk, CPU, output unit, and power supply unit are devices with high electrostatic withstand voltage that are not affected by static electricity due to discharge. On the other hand, the memory and the input unit are devices with low electrostatic withstand voltage that are affected by static electricity due to discharge. According to such a second program, it is possible to easily realize the fingerprint data generation apparatus 1 having the operational effects shown in the first embodiment with a general general-purpose computer.

  The program can be recorded on a recording medium. Examples of the recording medium include a hard disk 1100, a flexible disk 1200, a compact disk 1300, an IC chip 1400, and a cassette tape 1500 as shown in FIG. According to the recording medium on which such a program is recorded, the program can be easily stored, transported, sold, and the like.

  Further, the contents described in the modification can be realized by executing the third program on a general-purpose computer such as a personal computer, as in the first and second embodiments. Further, the third program can be recorded on a recording medium as in the first and second embodiments.

It is a figure which shows the structure of the fingerprint data generation system of Embodiment 1. FIG. FIG. 6 is a flowchart showing an operation of the fingerprint data generation apparatus according to the first embodiment. It is a figure which shows the structure of the fingerprint data generation apparatus of Embodiment 2. FIG. FIG. 10 is a flowchart illustrating an operation of the fingerprint data generation device according to the second embodiment. It is a figure which shows the recording medium which stores the program in Embodiment 1, 2 and a modification. It is a figure for demonstrating the concept of a 1st prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fingerprint data generation apparatus, 2 ... Memory | storage device, 11 ... 1st control part, 12 ... 2nd control part, 14 ... Abnormality detection part, 16 ... Control register, 18 ... Supply part, 20 ... Display part, 1100 ... Hard disk 1200: Flexible disk. DESCRIPTION OF SYMBOLS 1300 ... Compact disk, 1400 ... IC chip, 1500 ... Cassette tape, 2000 ... Contact part, 2100 ... Discharge sheet

Claims (5)

When the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the user's fingerprint is detected, and when the user's fingerprint is detected, the user's fingerprint is detected. A fingerprint data generation device having a generation means for generating fingerprint data for authenticating a user,
When the generating means detects a user's fingerprint, an abnormality detecting means for detecting an abnormal state in which the generating means will not operate normally or in the future, and an abnormal state is detected by the abnormality detecting means. In this case, the fingerprint data generating apparatus has control means for controlling the generating means so as to operate normally now or in the future. When the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the fingerprint image data is acquired, and fingerprint detection is performed based on the acquired image data. And a fingerprint data generating unit for generating fingerprint data for authenticating the user when the fingerprint detecting unit detects a fingerprint, and the fingerprint detecting unit can detect a fingerprint. A fingerprint data generation device having a register for storing an acquisition accuracy value indicating the accuracy with which the fingerprint detection means acquires the image data,
The fingerprint detection means acquires the acquisition accuracy value from the register at every leading timing of a certain period until fingerprint detection is performed,
When a user's fingerprint comes into contact with the contact portion, the image data of the fingerprint touched to the contact portion is acquired based on the acquisition accuracy value, and the fingerprint is detected based on the acquired image data. ,
If the fingerprint detection means detects the fingerprint of the user during the certain period from the predetermined start timing after acquiring the acquisition accuracy value from the register at a predetermined start timing, the acquisition is performed. Acquisition means for acquiring the acquisition accuracy value from a storage device for storing the accuracy value;
An abnormality detection unit that compares the acquisition accuracy value acquired by the acquisition unit with the acquisition accuracy value stored in the register, determines whether or not they match, and detects that they do not match;
When it is detected by the abnormality detection means that they do not coincide with each other, the acquisition accuracy value held in the register is acquired by the acquisition means during the certain period from the predetermined start timing. A fingerprint data generation device comprising: a rewriting means for rewriting the data. When the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the user's fingerprint is detected, and when the user's fingerprint is detected, the user's fingerprint is detected. A fingerprint data generation device having a generation means for generating fingerprint data for authenticating a user,
The generating means has a plurality of electronic components,
Supply means for supplying each electronic component with a power supply voltage within an allowable range necessary for the generating means to perform normal operation;
When a fingerprint of a user is detected by the generation unit, an abnormality detection unit that detects that a power supply voltage supplied to at least one of the plurality of electronic components is outside an allowable range;
When the abnormality detection means detects that the power supply voltage supplied to the at least one electronic component is outside the allowable range, the power supply voltage is supplied to the at least one electronic component to the supply means. Supply control means for controlling the power supply voltage within an allowable range to be supplied to the at least one electronic component,
A fingerprint data generation apparatus comprising: a control unit that controls the generation unit to operate normally when a power supply voltage within an allowable range is supplied to the at least one electronic component. When the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the fingerprint image data is acquired, and fingerprint detection is performed based on the acquired image data. And a fingerprint data generating unit for generating fingerprint data for authenticating the user when the fingerprint detecting unit detects a fingerprint, and the fingerprint detecting unit can detect a fingerprint. And a register for storing an acquisition accuracy value indicating the accuracy with which the fingerprint detection means acquires the image data, and the fingerprint detection means detects the fingerprint. Until obtaining the acquisition accuracy value from the register for each timing at the beginning of a certain period,
When a fingerprint of a user is brought into contact with the contact portion, the fingerprint detection unit acquires image data of the fingerprint contacted with the contact portion based on the acquisition accuracy value, and based on the acquired image data Performing fingerprint detection;
If the fingerprint detection means detects the fingerprint of the user during the certain period from the predetermined start timing after acquiring the acquisition accuracy value from the register at a predetermined start timing, the acquisition is performed. An acquisition step of acquiring the acquisition accuracy value from a storage device that stores the accuracy value;
Comparing the acquisition accuracy value acquired by the acquisition step with the acquisition accuracy value stored in the register to determine whether or not they match, and detecting that they do not match;
A step of rewriting the acquisition accuracy value stored in the register with the acquisition accuracy value acquired by the acquisition step during the certain period from the predetermined start timing when it is detected that they do not match A program that causes a computer to execute processing. When the user's fingerprint is in contact with a contact portion provided at a position where the user's fingerprint can be contacted, the user's fingerprint is detected, and when the user's fingerprint is detected, the user's fingerprint is detected. A program for controlling a fingerprint data generation device having a generation means for generating fingerprint data for authenticating a user,
The generating means has a plurality of electronic components,
Supplying each electronic component with a power supply voltage within an allowable range necessary for the generating means to perform normal operation;
Detecting a power supply voltage supplied to at least one of the plurality of electronic components out of an allowable range when a fingerprint of a user is detected by the generating means;
When it is detected that the power supply voltage supplied to the at least one electronic component is outside the allowable range, the power supply voltage is controlled not to be supplied to the at least one electronic component, and then the at least one electronic component Controlling to supply a power supply voltage within an allowable range to
A program for causing a computer to execute a process including a step of controlling the generation means to operate normally when a power supply voltage within an allowable range is supplied to the at least one electronic component.

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