JP2016009444A - Electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide electronic equipment capable of enhancing security compared with a case in which, only collation of a finger print is performed.SOLUTION: Electronic equipment 11 according to the invention is electronic equipment 11 capable of cancelling a lock which is set to a certain function, and comprises: a finger print acquisition part 101 for acquiring finger print data; a contact detection part 103 for detecting contact of a finger of a user; a tactile presentation part 107 for presenting a tactile to the finger contacting the contact detection part 103; a storage part 109 for storing the finger print data; and a control part 113 for controlling the tactile presentation part 107 so that plural kinds of tactiles including a predetermined tactile are individually presented to the finger. The control part 113 cancels the lock, when the finger print data acquired by the finger print acquisition part 101 matches the finger print data stored, and the tactile presented by the tactile presentation part 107 immediately before acquisition of the finger print data is the predetermined tactile.

Description

  The present invention relates to an electronic device.

  In an electronic device or the like that handles personal information, various devices such as a function for requesting a password or a password and a biometric authentication function are used in order to confirm the identity of the user. Biometric authentication includes methods that use physical features such as fingerprints, retinas, and blood vessels, and methods that use behavioral features such as handwritten signatures and blinks.

  Hereinafter, a conventional electronic device (portable terminal) having a fingerprint authentication function will be described (for example, see Patent Document 1). When the user of the portable terminal presses the finger against the input means of the portable terminal, the fingerprint sensor detects the fingerprint. If the detected fingerprint matches the pre-registered legitimate mobile terminal user's fingerprint, the user is authenticated as the legitimate mobile terminal user, and the user is set to lock. A non-contact IC card function can be used. If the detected fingerprint does not match the registered fingerprint, the user cannot use the non-contact IC card function.

JP 2006-155261 A

  However, in a portable terminal having a conventional fingerprint authentication function, the lock is released only by fingerprint authentication. Therefore, when another person who is not an authorized user obtains the fingerprint of the authorized user, the lock is released. In particular, mobile terminals can be carried, unlike bank ATMs (Automated Teller Machines) and ticket vending machines at stations. For example, while a legitimate user is sleeping, The lock may be released by pressing the finger against the mobile terminal.

  Accordingly, an object of the present invention, which has been made in view of the above-described problems of the prior art, is to provide an electronic device that can enhance security by only comparing fingerprints.

In order to solve the above-mentioned problems, the invention of the electronic device according to the first aspect is as follows:
In an electronic device that can unlock a certain function,
A fingerprint acquisition unit for acquiring fingerprint data;
A contact detection unit for detecting contact of a user's finger;
A tactile sensation providing unit for presenting a tactile sensation to a finger in contact with the contact detection unit;
A storage unit for storing fingerprint data;
A control unit that controls the tactile sensation providing unit to individually present a plurality of types of tactile sensations including a predetermined tactile sensation to the finger;
The control unit is configured such that the tactile sensation presented by the tactile sensation providing unit immediately before the fingerprint data acquired by the fingerprint acquisition unit matches the stored fingerprint data and is acquired. The electronic device that releases the lock.

The invention according to the second aspect is the electronic device according to the first aspect.
The electronic device further includes a load detection unit that detects a pressing load on the contact detection unit,
The controller is
Control the tactile sensation providing unit so that the tactile sensation presented to the finger changes according to the pressing load detected by the load detecting unit,
When the pressing load satisfies a predetermined load standard, the tactile sensation providing unit is controlled so as to present the predetermined tactile sensation.

The invention according to a third aspect is the electronic device according to the first aspect, in which the control unit includes:
The tactile sensation providing unit is controlled such that the tactile sensation presented to the finger changes according to the time during which the contact is continuously detected by the contact detection unit,
When the time satisfies a predetermined time standard, the tactile sensation providing unit is controlled so as to present the predetermined tactile sensation.

  The invention according to a fourth aspect is characterized in that, in the electronic device according to the first aspect, the control unit controls the tactile sensation providing unit so as to randomly present the plurality of types of tactile sensations. To do.

  According to the electronic device according to the present invention configured as described above, since the lock is released based on the fingerprint and the tactile sensation, security can be enhanced.

FIG. 1 is a front view and a rear view of a schematic electronic apparatus according to a first embodiment of the present invention. FIG. 2 is a functional block diagram showing a schematic configuration of the electronic device according to the first embodiment of the present invention. FIG. 3 is a flowchart illustrating processing performed by the electronic apparatus of FIG. FIG. 4 is a diagram illustrating contact between the electronic device of FIG. 1 and a user's finger. FIG. 5 is a diagram illustrating a correspondence relationship between the contact duration time and the tactile sensation. FIG. 6 is a diagram illustrating the movement of the user's finger that contacts the electronic device of FIG. 1. FIG. 7 is a diagram illustrating a correspondence relationship between the pressing load and the tactile sensation. FIG. 8 is a schematic rear view of the electronic apparatus according to the second embodiment of the present invention. FIG. 9 is a flowchart illustrating processing performed by the electronic device of FIG.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a front view and a rear view of a schematic electronic apparatus according to a first embodiment of the present invention. As an example of the electronic device 11 of the present invention, a smartphone (mobile phone terminal), a personal computer, a PDA (Personal Digital Assistant), a portable music player, a portable TV, and a portable game machine can be cited. Hereinafter, a description will be given assuming that the electronic device 11 is a smartphone. The electronic device 11 can set and release a lock for each function.

  The functions of the electronic device 11 that improve the user's convenience by being able to set the lock include, for example, a non-contact IC card function, an address book function, a memo pad function, a mail function, a communication function, and a screen lock function. is there. Note that the lock setting and release targets include not only the function itself (that is, initial activation of the function) but also individual processing of the function (for example, transmission processing in the mail function).

  A touch panel 100 is provided on the front surface of the electronic device 11. The touch panel 100 displays a graphical user interface or the like corresponding to the function activated by the user, and the user can use the activated function by contacting the touch panel 100 with a finger, a stylus pen, or the like.

  On the back surface of the electronic device 11, a fingerprint acquisition unit 101 that acquires fingerprint data (fingerprint data) of a finger touched by the user, a contact detection unit 103 that touches the user's finger and vibrates in response to the contact, Is provided. In the present embodiment, it is assumed that the fingerprint acquisition unit 101 is located in a partial region of the contact detection unit 103 as shown in FIG. The electronic device 11 may further include an imaging unit 111 that captures an image of a user who is touching the contact detection unit 103 with a finger.

  FIG. 2 is a functional block diagram showing a schematic configuration of the electronic device according to the first embodiment of the present invention. In order to perform fingerprint authentication, the electronic device 11 includes a fingerprint acquisition unit 101, a contact detection unit 103, a load detection unit 105, a tactile sensation presentation unit 107, a storage unit 109, an imaging unit 111, and a control unit 113. Have The fingerprint acquisition unit 101, the contact detection unit 103, the load detection unit 105, the tactile sensation presentation unit 107, the storage unit 109, and the imaging unit 111 are connected to the control unit 113, respectively.

  The fingerprint acquisition unit 101 is for acquiring fingerprint data of a user's finger, and includes, for example, a known type such as an optical type, a semiconductor type (for example, electrostatic type, thermal type, electric field type). The fingerprint acquisition unit 101 sends the acquired fingerprint data (hereinafter referred to as verification fingerprint data) to the control unit 113 described later.

  The contact detection unit 103 includes a fingerprint acquisition unit 101 and detects contact with a user's finger, and can be configured by a touch panel, for example. When the contact detection unit 103 detects a contact, the contact detection unit 103 outputs contact position information regarding the position of the contact to the control unit 113. When the contact detection unit 103 is a touch panel, the touch panel is configured by a known method such as a resistance film method, a capacitance method, or an optical method. Note that it is not essential for the finger to physically contact the contact detection unit 103 in order for the contact detection unit 103 to detect contact. For example, when the contact detection unit 103 is an optical type, the contact detection unit 103 detects the position where the infrared rays on the contact detection unit 103 are blocked by the finger, so that it is not necessary for the finger to contact the contact detection unit 103. It is.

  The load detection unit 105 detects a pressing load on the contact detection unit 103, and is configured using an element that linearly reacts to a load such as a strain gauge sensor or a piezoelectric element, for example.

  The tactile sensation providing unit 107 vibrates the contact detection unit 103 and presents a tactile sensation to the user's finger that is in contact with the contact detection unit 103, and is configured using, for example, a vibration element such as a piezoelectric element. For example, when the tactile sensation providing unit 107 is disposed in the contact detection unit 103, the tactile sensation providing unit 107 directly vibrates the contact detection unit 103. The tactile sensation providing unit 107 individually presents a plurality of types of tactile sensations including a predetermined tactile sensation under the control of the control unit 113 described later. The tactile sensation providing unit 107 can realize a plurality of types of tactile sensations by changing parameter values such as frequency, period (wavelength), amplitude, and waveform. The predetermined tactile sensation is a tactile sensation to be presented before fingerprint data acquisition by the fingerprint acquisition unit 101 in order to release the lock, and is predetermined by a legitimate user of the electronic device 11.

  The plurality of types of tactile sensations presented by the tactile sensation providing unit 107 can include not only simple vibrations but also a hard and hard tactile sensation (real click feeling) that can be felt when a mechanical key is pressed. By setting conditions for presenting tactile sensation (for example, the pressing load exceeds 1 N [Newton]), the user's sense of pressure is stimulated until this condition is satisfied. The detection unit 103 can be vibrated to stimulate the user's sense of touch. In this way, by stimulating the user's pressure and tactile sensation, it is possible to present the user with a hard and hard feel. The contact detection unit 103 itself is not physically displaced like a mechanical key even if it is touched, but by presenting the above tactile sensation to the finger, the user operates the mechanical key. Similar realistic click feeling can be obtained. A clicked hard tactile sensation can be realized by, for example, presenting a sine wave of 140 Hz to 500 Hz for one period or a rectangular wave for one period.

  When the load detection unit 105 and the tactile sensation providing unit 107 are configured using piezoelectric elements, the load detection unit 105 and the tactile sensation providing unit 107 can be configured by using the piezoelectric elements in common. This is because the piezoelectric element generates electric power when pressure is applied and deforms when electric power is applied.

  The storage unit 109 can be configured by a memory according to a known technique, stores legitimate fingerprint data, parameter values for realizing a plurality of types of tactile sensations presented by the tactile sensation presentation unit 107, and also serves as a work memory or the like. Function. The legitimate fingerprint data is fingerprint data of a legitimate user of the electronic device 11.

  The imaging unit 111 captures an image of a user whose finger is in contact with the contact detection unit 103, and is, for example, a camera.

  The control unit 113 controls and manages the entire electronic device 11 including each functional block of the electronic device 11. Here, the control unit 113 is configured as software executed on an arbitrary suitable processor such as a CPU (Central Processing Unit), or a dedicated processor specialized for each process (for example, DSP (Digital Signal Processor)). Can be configured.

  The control unit 113 will be described in more detail. The control unit 113 determines whether the verification fingerprint data transmitted from the fingerprint acquisition unit 101 matches the legitimate fingerprint data stored in the storage unit 109. The control unit 113 performs the determination by a known method such as a pattern matching method, a feature point extraction method, or a frequency analysis method.

  Further, the control unit 113 controls the tactile sensation providing unit 107 to present tactile sensation, and the tactile sensation presented to the tactile sensation providing unit 107 immediately before the verification fingerprint data is acquired by the fingerprint acquisition unit 101 is a predetermined tactile sensation. Determine whether or not. The tactile sensation immediately before the verification fingerprint data is acquired is the final tactile sensation of the tactile sensation presented by the tactile sensation providing unit 107 until the control unit 113 receives the verification fingerprint data.

  When the verification fingerprint data matches the valid fingerprint data and the last tactile sensation is a predetermined tactile sensation, the control unit 113 releases the lock set for the function. The matching between the verification fingerprint data and the legitimate fingerprint data is not limited to exact complete matching. For example, if the error range is set in advance and is within the error range, the verification fingerprint data and the legitimate fingerprint data are valid. It can be considered that the fingerprint data matches. Other processes performed by the control unit 113 will be described in detail with reference to FIG.

  Hereinafter, the case where the electronic device 11 releases the lock will be described with reference to FIG. FIG. 3 is a flowchart illustrating processing performed by the electronic apparatus of FIG. In the present embodiment, the fingerprint acquisition unit 101 starts acquiring fingerprint data of a finger when the contact detection unit 103 detects a finger contact on the fingerprint acquisition unit 101.

  In order to release the lock set for a certain function, the user brings the finger 121 into contact with the region of the contact detection unit 103 other than the region of the fingerprint acquisition unit 101 as shown in FIG. Then, the contact detection part 103 detects the said contact (step S101). The contact detection unit 103 sends the contact position information to the control unit 113.

  When the control unit 113 recognizes a finger contact with the contact detection unit 103 based on the contact position information received from the contact detection unit 103, the tactile sensation is presented so that a plurality of types of tactile sensations including a predetermined tactile sensation are individually presented to the finger. The unit 107 is controlled (step S102). The control unit 113 can control the tactile sensation providing unit 107 to present a plurality of types of tactile sensations in a predetermined order. For example, as shown in FIG. 5, the control unit 113 can make the order of the tactile sensation presented correspond to the time during which contact is being detected by the contact detection unit 103. That is, the control unit 113 can control the tactile sensation providing unit 107 so that the tactile sensation presented to the finger changes according to the time during which contact is continuously detected by the contact detection unit 103 (contact continuation time). . The measurement of the contact duration can be realized by using, for example, an RTC (Real Time Clock).

  In FIG. 5, the control unit 113 sets three time ranges tr1, tr2, and tr3 related to the duration of contact. The time range tr1 is greater than or equal to the threshold t1 and less than the threshold t2, the time range tr2 is greater than or equal to the threshold t2 and less than the threshold t3, and the time range tr3 is greater than or equal to the threshold t3 and less than the threshold t4. In the time range tr1, a tactile sensation (tactile sensation 1) realized by a two-cycle sine wave is obtained. In a time range tr2, a tactile sensation (tactile sensation 2) realized by a two-cycle rectangular wave is obtained. A tactile sensation (tactile sensation 3) realized by a period sine wave and one period rectangular wave is assigned. As a result, as the duration of contact becomes longer, the control unit 113 controls the tactile sensation providing unit 107 to present the tactile sensation 1, the tactile sensation 2 and the tactile sensation 3 in this order.

  In the time range setting of FIG. 5, the threshold value t1 belongs to the time range tr1, the threshold value t2 belongs to the time range tr2, and the threshold value t3 belongs to the time range tr3. However, the present invention is limited to this mode. Is not to be done. Whether the threshold value belongs to which time range is an item that can be arbitrarily set. For example, the time range tr1 can be set to be a range greater than the threshold value t1 and less than or equal to the threshold value t2. Further, the present invention is not limited to three time ranges, and two or more time ranges can be provided according to the type of tactile sensation presented on the finger.

  Further, the control unit 113 can also control the tactile sensation providing unit 107 so as to present a plurality of tactile sensations at random regardless of the duration of contact. Furthermore, the control unit 113 can also control the tactile sensation providing unit 107 so as to repeatedly present the tactile sensation already presented to the finger periodically or aperiodically. Further, the control unit 113 can set a time interval from the presentation of the tactile sensation in the tactile sensation providing unit 107 to the presentation of the next tactile sensation. You can not.

  In step S102, the user continues to touch the contact detection unit 103 until a predetermined tactile sensation is felt through the finger. When the control unit 113 changes the tactile sensation according to the duration of contact, the tactile sensation providing unit 107 can be controlled to present a predetermined tactile sensation when the duration satisfies a predetermined time standard. The predetermined time reference is a condition for presenting a predetermined tactile sensation. For example, when the predetermined tactile sensation is the tactile sensation assigned to the time range tr2 in FIG. 5, the predetermined time reference is that the duration is located in the time range tr2 (the threshold t2 or more and less than the threshold t3). That is, the user keeps the finger in contact with the contact detection unit 103 for a time that satisfies a predetermined time standard.

  When the user feels a predetermined tactile sensation, the user moves (slides) the finger 121 in the direction of the fingerprint acquisition unit 101 while making contact with the contact detection unit 103 as shown in FIG. When the contact position information of the contact detection unit 103 indicates an area on the fingerprint acquisition unit 101, the control unit 113 controls the fingerprint acquisition unit 101 to acquire fingerprint data (step S103).

  When the fingerprint acquisition unit 101 acquires fingerprint data, the fingerprint acquisition unit 101 sends the fingerprint data (verification fingerprint data) to the control unit 113. Then, the control unit 113 reads legitimate fingerprint data from the storage unit 109 and determines whether the verification fingerprint data matches the legitimate fingerprint data (step S104).

  If the verification fingerprint data matches the valid fingerprint data (Yes in step S104), the control unit 113 determines whether or not the tactile sensation immediately before the verification fingerprint data is acquired is a predetermined tactile sensation (step S105). .

  If the previous tactile sensation is a predetermined tactile sensation (Yes in step S105), the control unit 113 releases the lock (step S106).

  In step S104, if the verification fingerprint data does not match the valid fingerprint data (No in step S104), it means that the fingerprint authentication has failed, and the control unit 113 can execute a warning process (step S104). S107). The warning process is a process for notifying the user that the fingerprint authentication has failed. For example, the touch panel 100 displays characters indicating that the fingerprint authentication has failed on the touch panel 100, or the electronic device 11 has a voice output unit such as a speaker. If it has, the sound corresponding to the failure of fingerprint authentication can be output. Even if authentication is performed by a legitimate user, fingerprint authentication may fail due to dirt on the finger, dirt on the fingerprint acquisition unit 101, or the like.

  If fingerprint data of another person who is not a valid user is detected, the verification fingerprint data does not coincide with the valid fingerprint data. In order to prevent fingerprint authentication by another person, the control unit 113 can execute a camouflage response process in step S108 described later instead of the warning process.

  In step S105, when the previous tactile sensation is not the predetermined tactile sensation (No in step S105), it means that the user does not grasp the predetermined tactile sensation. That is, since it means that fingerprint authentication is performed by a person who illegally obtained a fingerprint of a legitimate user (fingerprint fingerprint acquirer), the control unit 113 can execute a camouflage handling process (step S108). ). The forgery handling process is a process for making it difficult for an unauthorized fingerprint acquirer to perform further operations or a process for specifying an unauthorized fingerprint acquirer. The process for making it difficult for an unauthorized fingerprint acquirer to operate is that the control unit 113 stops the function of the fingerprint acquisition unit 101 so that, for example, the fingerprint authentication function itself is invalidated. In addition, when the secret information browsing function is locked, the control unit 113 can change the storage location of the secret information so that the secret information is not disclosed by unlocking the browsing function. . The process for specifying an unauthorized fingerprint acquirer is, for example, that the control unit 113 controls the imaging unit 111 to capture an image of the unauthorized fingerprint acquirer. Note that the control unit 113 can also execute a warning process in step S107 that simply informs the user that fingerprint authentication has failed, instead of the camouflage handling process.

  Note that the electronic device 11 can include a load detection unit 105. In this case, the load detection unit 105 detects the pressing load on the contact detection unit 103 from the time when the finger physically contacts the contact detection unit 103. You can start. The load detection unit 105 sends the detected pressing load to the control unit 113.

  When receiving a pressing load from the load detection unit 105, the control unit 113 can control the tactile sensation providing unit 107 so that the tactile sensation presented to the finger changes according to the pressing load. For example, the control unit 113 can set the load ranges wr1, wr2, and wr3 related to the pressing load as shown in FIG. The load range wr1 is a threshold value w1 or more and less than the threshold value w2, the load range wr2 is a threshold value w2 or more and less than the threshold value w3, and the load range wr3 is a threshold value w3 or more and less than the threshold value w4. The load range wr1 has a tactile sensation (tactile sensation 1) realized by a two-cycle sine wave, the load range wr2 has a tactile sensation (tactile sensation 2) realized by a two-cycle rectangular wave, and the load range wr3 has a tactile sensation 1 A tactile sensation (tactile sensation 3) realized by a period sine wave and one period rectangular wave is assigned. As a result, as the contact pressing load increases, the control unit 113 controls the tactile sensation providing unit 107 to present in the order of tactile sensation 1, tactile sensation 2 and tactile sensation 3.

  In the load range setting of FIG. 7, the threshold value w1 belongs to the load range wr1, the threshold value w2 belongs to the load range wr2, and the threshold value w3 belongs to the load range wr3. However, the present invention is limited to this mode. Is not to be done. Which load range the threshold belongs to is a matter that can be arbitrarily set. For example, the load range wr1 can be set to be a range greater than the threshold w1 and less than or equal to the threshold w2. In addition, the present invention is not limited to three load ranges, and two or more load ranges can be provided according to the type of tactile sensation presented on the finger.

  Then, the control unit 113 can control the tactile sensation providing unit 107 so as to present a predetermined tactile sensation when the pressing load satisfies a predetermined load standard. The predetermined load standard is a condition for presenting a predetermined tactile sensation. For example, when the predetermined tactile sensation is the tactile sensation assigned to the load range wr2 in FIG. 7, the predetermined load standard is that the pressing load is located in the load range wr2 (threshold w2 or more and less than w3). The user can obtain a predetermined tactile sensation for unlocking by adjusting the pressing load.

  As described above, in the present embodiment, the control unit 113 of the electronic apparatus 11 immediately before the fingerprint data (verification fingerprint data) acquired by the fingerprint acquisition unit 101 matches the valid fingerprint data and the fingerprint data is acquired. When the tactile sensation presented to the tactile sensation presentation unit 107 is a predetermined tactile sensation, the lock is released. That is, the lock is not released only by collating the fingerprint. In order for someone other than the authorized user to release the lock, not only the fingerprint data of the authorized user but also a predetermined tactile sensation must be grasped. The tactile sensation is transmitted to the finger that the contact detection unit 103 is in contact with, and is not reflected in the visual sense. Since the electronic device 11 requires collation of both tactile sensation and fingerprint for unlocking, security can be enhanced.

  In the present embodiment, the control unit 113 can control the tactile sensation providing unit 107 so as to present a predetermined tactile sensation when the pressing load satisfies a predetermined load standard. Thereby, the user can obtain a predetermined tactile sensation at a timing desired by the user by grasping a pressing load necessary for presenting the predetermined tactile sensation. In addition, the user can quickly release the lock by getting used to adjusting the pressing load.

  Further, in the present embodiment, the control unit 113 can control the tactile sensation providing unit 107 to present a predetermined tactile sensation when the time (duration) during which contact is continuously detected satisfies a predetermined time reference. . Accordingly, even for a user who is difficult to distinguish between the plurality of types of tactile sensations presented by the sense of the fingertip, the electronic device 11 can be easily used by grasping the duration corresponding to the predetermined tactile sensation.

  In the present embodiment, the control unit 113 can control the tactile sensation providing unit 107 to present a plurality of types of tactile sensations randomly. Since a predetermined tactile sensation is specified from a plurality of tactile sensations only by the sense of the fingertip, it is impossible for another person to recognize the predetermined tactile sensation even when paying attention to the pressing load and the duration. Therefore, stronger security can be realized.

(Second Embodiment)
In the first embodiment, the fingerprint acquisition unit 101 is located in a partial area of the contact detection unit 103, and the control unit 113 causes the fingerprint acquisition unit 101 to acquire fingerprint data by touching the fingerprint acquisition unit 101 with a finger. Explained. In the second embodiment, a case will be described in which the area of the contact detection unit and the area of the fingerprint acquisition unit are the same, and the control unit does not cause the fingerprint acquisition unit to acquire fingerprint data only by touching the fingerprint acquisition unit. .

  FIG. 8 is a schematic rear view of the electronic apparatus according to the second embodiment of the present invention. About the front view of the electronic device 21, since it is the same as the front view of the electronic device 11 shown by FIG. 1, it abbreviate | omits. As with the first embodiment, the electronic device 21 can set and release a lock for each function. A fingerprint acquisition unit 201 and a contact detection unit 203 that have the same area are provided on the back surface of the electronic device 21. Moreover, the electronic device 21 can also include the imaging unit 211 as in the first embodiment.

  As with the electronic device 11, the electronic device 21 has the same function as the electronic device 11, the fingerprint acquisition unit 201, the contact detection unit 203, the load detection unit 205, the tactile sensation presentation unit 207, the storage unit 209, the imaging unit 211, and the control. Part 213. The fingerprint acquisition unit 201, the contact detection unit 203, the load detection unit 205, the tactile sensation presentation unit 207, the storage unit 209, and the imaging unit 211 are connected to the control unit 213, respectively. Since the functional units 201, 203, 205, 207, 209, and 211 other than the control unit 213 have the same functions as the functional units 101, 103, 105, 107, 109, and 111 of the first embodiment, descriptions thereof are omitted. . The function of the control unit 213 will be described in detail with reference to FIG.

  In order to release the lock set for a certain function, the user brings a finger into contact with the area of the contact detection unit 203 that shares the area with the fingerprint acquisition unit 201. Then, the contact detection part 203 detects the said contact (step S201). The contact detection unit 203 sends contact position information to the control unit 213.

  The load detection unit 205 starts to detect the pressing load on the contact detection unit 203 from the time when the finger physically contacts the contact detection unit 203 (step S202). The load detection unit 205 sends the detected pressing load to the control unit 213.

  The control unit 213 recognizes a finger contact with the contact detection unit 203 based on the contact position information received from the contact detection unit 203. Then, the control unit 213 controls the tactile sensation providing unit 207 so that the tactile sensation presented to the finger changes according to the pressing load received from the load detection unit 205 (step S203). For example, similarly to FIG. 7 in the first embodiment, the control unit 213 sets load ranges wr1, wr2, and wr3 related to the pressing load, and assigns different types of tactile sensations to each load range.

  Then, the control unit 213 controls the tactile sensation providing unit 207 so as to present a predetermined tactile sensation when the pressing load satisfies a predetermined load standard. For example, when the predetermined tactile sensation is the tactile sensation assigned to the load range wr2 in FIG. 7, the predetermined load standard is that the pressing load is located in the load range wr2 (threshold w2 or more and less than w3).

  Subsequently, the control unit 213 determines whether or not the time during which the pressing load continues to satisfy the predetermined load criterion satisfies the predetermined time criterion (step S204). The predetermined time reference is a condition for the control unit 213 to cause the fingerprint acquisition unit 201 to acquire fingerprint data. For example, the time during which the load reference is satisfied is equal to or greater than the threshold value t5. The threshold value t5 is an item that can be arbitrarily set.

  When the time for which the load standard continues to be satisfied does not satisfy the predetermined time standard (No in step S204), the control unit 213 causes the tactile sensation providing unit 207 to present a tactile sensation according to the pressing load (steps S202 and S203). .

  When the time during which the load criterion is satisfied satisfies the predetermined time criterion (Yes in step S204), the control unit 213 controls the fingerprint acquisition unit 201 to acquire fingerprint data (verification fingerprint data). As a result, the fingerprint acquisition unit 201 acquires fingerprint data of the finger that is in contact with the fingerprint acquisition unit 201 (step S205). When the fingerprint acquisition unit 201 acquires fingerprint data, the fingerprint acquisition unit 201 sends the fingerprint data to the control unit 213. In this embodiment, since the area of the fingerprint acquisition unit 201 and the area of the contact detection unit 203 are the same, the user shifts (slides) the finger from the contact detection unit to the fingerprint acquisition unit as in the first embodiment. There is no need.

  The control unit 213 reads legitimate fingerprint data from the storage unit 209, and determines whether or not the verification fingerprint data matches the legitimate fingerprint data (step S206). When the verification fingerprint data matches the valid fingerprint data (Yes in step S206), the control unit 213 releases the lock (step S207).

  If the verification fingerprint data does not match the valid fingerprint data (No in step S206), the control unit 213 does not release the lock. In this case, the control unit 213 can execute a warning process or a camouflage response process, like the processes in steps S107 and S108 of the first embodiment.

  As described above, in the present embodiment, the control unit 213 of the electronic device 21 causes the fingerprint acquisition unit 201 to acquire fingerprint data when the time during which the pressing load continues to satisfy the predetermined load criterion satisfies the predetermined time criterion. Control. When the pressing load satisfies a predetermined load standard, a predetermined tactile sensation is presented to the user's finger. Therefore, the user can maintain a pressing load that satisfies a predetermined load standard by continuing to feel a predetermined tactile sensation. When the time when the load criterion is satisfied satisfies the predetermined time criterion, the fingerprint data is acquired without moving the finger by the user. Therefore, even if a person other than the legitimate user peeks at the unlocking of the legitimate user, he / she grasps all of the predetermined tactile sensation, the pressing load satisfying the predetermined load standard, and the contact duration satisfying the time standard. I can't. Thus, security is enhanced compared to an electronic device that is unlocked only by fingerprint verification.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each member, each means, each step, etc. can be rearranged so as not to be logically contradictory, and a plurality of means, steps, etc. can be combined into one or divided. Is possible.

  In the above description of the embodiment of the present invention, for example, the meaning of the technical idea of the expression such as the threshold value “more than” or the threshold value “less than” is not necessarily a strict meaning, and according to the specifications of the electronic device, The meaning of the case where the reference threshold value is included or not included is included. For example, the threshold “above” may imply not only the case where the comparison target (contact duration and pressing load) reaches the threshold but also the case where the threshold is exceeded. Further, for example, “less than the threshold value” may imply not only the case where the comparison target falls below the threshold value but also the case where the threshold value is reached, that is, the case where the comparison target is below the threshold value.

  Further, in the description of the first and second embodiments of the present invention described above, the tactile sensation condition as to whether or not the tactile sensation presented to the finger matches a predetermined tactile sensation matches the fingerprint data whose verification fingerprint data is valid. It has been described that the lock is released when each of the fingerprint conditions is satisfied once. However, in the present invention, the number of conditions that must be satisfied for unlocking is not limited to one, but can be multiple. For example, after the tactile sensation condition and the fingerprint condition are satisfied once, and the tactile sensation condition and the fingerprint condition are satisfied one more time, the control unit can release the lock. In the second tactile sensation condition, the predetermined tactile sensation can be changed to the first tactile sensation condition. In this case, a legitimate user needs to know in advance in which order the tactile sensation needs to be obtained. As the number of tactile sensation conditions and fingerprint conditions to be satisfied is increased, the security becomes stronger.

DESCRIPTION OF SYMBOLS 11 Electronic device 100 Touch panel 101 Fingerprint acquisition part 103 Contact detection part 105 Load detection part 107 Tactile sense presentation part 109 Storage part 111 Imaging part 113 Control part 121 Finger tr1, tr2, tr3 Time range t1, t2, t3, t4 Threshold value wr1, wr2 , Wr3 load range w1, w2, w3, w4 threshold

Claims (4)

In an electronic device that can unlock a certain function,
A fingerprint acquisition unit for acquiring fingerprint data;
A contact detection unit for detecting contact of a user's finger;
A tactile sensation providing unit for presenting a tactile sensation to a finger in contact with the contact detection unit;
A storage unit for storing fingerprint data;
A control unit that controls the tactile sensation providing unit to individually present a plurality of types of tactile sensations including a predetermined tactile sensation to the finger;
The control unit is configured such that the tactile sensation presented by the tactile sensation providing unit immediately before the fingerprint data acquired by the fingerprint acquisition unit matches the stored fingerprint data and is acquired. If so, an electronic device that releases the lock. The electronic device according to claim 1,
The electronic device further includes a load detection unit that detects a pressing load on the contact detection unit,
The controller is
Control the tactile sensation providing unit so that the tactile sensation presented to the finger changes according to the pressing load detected by the load detecting unit,
An electronic apparatus, wherein the tactile sensation providing unit is controlled so as to present the predetermined tactile sensation when the pressing load satisfies a predetermined load standard. The electronic device according to claim 1, wherein the control unit includes:
The tactile sensation providing unit is controlled such that the tactile sensation presented to the finger changes according to the time during which the contact is continuously detected by the contact detection unit,
An electronic apparatus characterized by controlling the tactile sensation providing unit so as to present the predetermined tactile sensation when the time satisfies a predetermined time standard.   The electronic device according to claim 1, wherein the control unit controls the tactile sensation providing unit so as to randomly present the plurality of types of tactile sensations.

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