JP5692982B2 - Input device - Google Patents

Description

  The present invention relates to an input device, and more particularly to an input device for inputting an authentication code.

  To use ATMs (Automated Teller Machines) and credit cards of automatic transaction equipment installed at financial institutions and convenience stores, a PIN (authentication) that only the customer (user) who owns the card knows Code). However, recently, when an authentication code is input, the authentication code leaks due to peeping or voyeurism, and unauthorized transactions due to the leaked authentication code tend to increase.

  For this reason, in recent years, security for authentication codes has been emphasized, and various measures have been taken. For example, Patent Document 1 below discloses a personal identification number input device that can prevent leakage of an authentication code even when the fingertip is viewed by another person when the authentication code is input.

  This personal identification number input device includes a display unit, an input unit including a numeric keypad, and an information processing unit that executes information processing. A series of information processing as shown in FIG. 8 is performed by the information processing unit. ing. The customer does not input the personal identification number (authentication code) as it is, but inputs a numerical value obtained by performing a predetermined calculation on the personal identification number in accordance with an instruction issued from the personal identification number input device side.

  For example, as shown in FIG. 8, when the personal identification number is “1234”, first, the information processing unit determines the calculation method and operand for each digit. Then, the information processing unit causes the display unit to display an instruction “Please input a value obtained by adding 2 to the first digit of your personal identification number and press the execution key”. As the first numerical value input operation, the customer adds “2” of the operand determined by the information processing unit to “1”, which is the first digit, in the personal identification number according to the instruction displayed on the display unit. "From the input section and press the Enter key. The customer repeats such an operation for four digits, and the information processing unit performs an inverse calculation from the input numerical value to derive the original personal identification number for authentication.

  As described above, in the password input device described in Patent Document 1, since the number key and the password entered by the customer are different, even when the fingertip is directly observed by another person when the password is entered. There is a personal identification number input device in which the personal identification number is not stolen.

JP 2008-140009 A

  However, in an input device in which a user directly inputs a personal identification number (authentication code), the input code corresponding to the pressed key is accepted as it is. That is, since the pressed key and the input code received by the input device correspond to each other, there is a problem that the authentication code leaks when the pressed key is peeped or voyeurized.

  Further, as in Patent Document 1, even if the authentication code is not directly input, if the instruction displayed on the display unit is seen or a voyeur is taken, the authentication code can be easily calculated. There is a problem that the authentication code is leaked to others.

  This is because the input code corresponding to the pressed key is accepted as it is, so when a peep or voyeur is taken, the input code that the input device accepts from the pressed key is known to the other person, and the input This is because the authentication code is derived by performing the calculation based on the code and the instruction displayed on the display unit.

  An object of the present invention is to provide an input device that can prevent leakage of an authentication code even when an operation for inputting the authentication code is seen by others.

The invention according to claim 1 that achieves the above object is as follows:
An input device for inputting an authentication code,
A display unit for displaying an input code for inputting the authentication code;
A touch sensor for detecting an input to an input code displayed on the display unit;
A load detection unit for detecting a pressing load on the touch surface of the touch sensor;
A control unit that controls to accept an authentication code based on the input code and the pressure load detected by the load detection unit when an input is detected with respect to the input code by the touch sensor;
It is characterized by providing.

The invention according to claim 2 is the input device according to claim 1,
The control unit is configured to change the authentication code by a pressing load detected by the load detection unit when an input to the input code is detected.

The invention according to claim 3 is the input device according to claim 2, wherein the input device further includes:
A tactile sensation providing unit that vibrates the touch surface of the touch sensor;
The control unit is configured to control the tactile sensation providing unit so as to present a change of the authentication code due to the pressing load by tactile sensation with respect to a pressing object pressing the touch surface.

  ADVANTAGE OF THE INVENTION According to this invention, even when the operation which inputs an authentication code is seen by others, the input device which can prevent the leakage of an authentication code can be provided.

It is a block diagram which shows schematic structure of the input device which concerns on one embodiment of this invention. It is a figure which shows the conceptual diagram of tactile sensation generation | occurrence | production of the input device which concerns on this invention. It is a figure which shows the example of a display of the display part of the input device which concerns on one embodiment of this invention. It is a flowchart which shows operation | movement of the input device which concerns on one embodiment of this invention. It is a figure which shows an example of the change of the press load at the time of receiving the authentication code in the input device which concerns on one embodiment of this invention. It is a figure which shows an example of the change of the press load at the time of receiving the authentication code in the input device which concerns on one embodiment of this invention. It is a figure which shows the authentication method in the conventional input device.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, as an example of the input device of the present invention, an input device for inputting an authentication code such as a credit card terminal such as a bank ATM, a CAT (Credit Authorization Terminal) or a CCT (Credit Center Terminal) The description will be made assuming that a touch panel is provided. However, the input device of the present invention is not limited to the above-described devices. For example, various devices including an input device such as a station ticket vending machine, a desktop PC, a mobile phone, and a PDA ( A personal digital assistant), a notebook PC, a mini-notebook PC, or the like can be used as a portable terminal equipped with an input device.

  Furthermore, as will be described later, the input device of the present invention is not limited to a device having a touch panel. The present invention can be applied to any input device as long as it has a function of detecting a pressing load applied to the switch and a touch button or a push button (or key) that accepts a user's pressing input. it can.

  FIG. 1 is a functional block diagram schematically showing the internal configuration of the input device 1 according to the present embodiment. As shown in FIG. 1, the input device 1 includes a touch panel 20, a load detection unit 12, a tactile sensation providing unit 13, a storage unit 15, and a control unit 16 that controls the overall operation.

In the present embodiment, touch panel 20 includes touch sensor 11 and display unit 14. The touch panel 20 is configured by arranging a touch sensor 11 that receives a user input so as to be superimposed on the front surface of the display unit 14.
The touch sensor 11 of the touch panel 20 is normally disposed on the front surface of the display unit 14, and press input (touch input) with a pressing object such as a user's finger or a stylus pen with respect to an input code displayed on the display unit 14, It is received by the touch surface of the corresponding touch sensor 11. The touch sensor 11 is configured by a known method such as a resistance film method, a capacitance method, and an optical method.

  The load detection unit 12 detects a pressing load on the touch surface of the touch sensor 11 and is configured using an element that reacts to a load such as a strain gauge sensor or a piezoelectric element. When the user inputs the authentication code, the user presses the touch surface of the touch sensor 11 to input. The load detection unit 12 detects a pressing load applied to the touch surface during the pressing input.

  As described above, in the present application, a load when a touch target such as a finger or a stylus pen used when a user performs a press input and the touch panel 20 (touch sensor 11) is in contact with a “press load”. Called. The authentication code here is a code that only the user himself / herself can know, such as a personal identification number, and is generally used for identity verification. The authentication code is composed of one or a plurality of input codes, and generally consists of one or more digits of characters or numbers.

  In the present application, one input code has a plurality of authentication codes according to the pressing load. For example, when the input code is “2” when the pressing load is divided into two, light and heavy, and when the detected pressing load is light, the first stage of the input code “2” The authentication code “2” is received as an input, and when the pressing load is heavy, the authentication code “2 ′” is received as a second-stage input of the input code “2”. Note that “′” indicates that the input at the first stage is different from the input at the second stage, and in this application, it is attached to the input at the second stage.

  The tactile sensation providing unit 13 vibrates the touch surface of the touch sensor 11 and is configured using, for example, a piezoelectric vibrator. By vibrating the tactile sensation providing unit 13, vibration can be transmitted to a pressed object such as a user's finger pressing the touch surface.

  When the load detection unit 12 and the tactile sensation providing unit 13 are configured using piezoelectric elements, the load detection unit 12 and the tactile sensation providing unit 13 can be configured by sharing the piezoelectric elements.

  The display unit 14 of the touch panel 20 displays an input code (Hiragana, Katakana, Kanji, English, numbers, symbols, etc.) for inputting an authentication code. This input code is, for example, a push button switch ( It has the form of an input button such as a push button switch. And the display part 14 is comprised using a liquid crystal display panel, an organic electroluminescent display panel, etc., for example.

  The storage unit 15 stores various input information, authentication codes, and the like, and also functions as a work memory. Stores applications and various input information.

  The control unit 16 controls and manages the entire input device 1 including each functional block of the input device 1. Here, the control unit 16 is configured as software executed on any 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.

  With the configuration as described above, if a stepwise threshold is set for the pressing load detected by the load detection unit 12, the input device 1 accepts a plurality of steps of input according to the pressing load of the pressing input by the user. Can do.

  2A is a diagram illustrating an example of a mounting structure of the touch panel 20, the load detection unit 12, and the tactile sensation providing unit 13 of the input device 1 illustrated in FIG. 2A shows a cross-sectional view of the main part of the input device 1. FIG.

  FIG. 2A shows a state where the user presses the touch surface of the touch sensor 11 at a position corresponding to the input code displayed on the display unit 14 when inputting the authentication code. .

  The touch sensor 11 detects an input press by a user. When the touch sensor 11 is pressed, the pressing portion is slightly bent (distorted) according to the pressing force. The load detection unit 12 detects the load when the finger pressing the touch sensor 11 by the user and the touch surface of the touch sensor 11 come into contact with each other. For this reason, the load detection part 12 is arrange | positioned on the back surface of the touch sensor 11 so that the pressing load based on the pressing force concerning the touch sensor 11 may be transmitted. The tactile sensation providing unit 13 presents a tactile sensation to the user's finger at an appropriate timing based on the pressing load detected by the load detecting unit 12. For this reason, the tactile sensation providing unit 13 is disposed so as to contact the touch sensor 11, for example, so that vibration can be transmitted to the touch sensor 11. Further, when the touch sensor 11 detects an input to the input code, the tactile sensation providing unit 13 vibrates the touch sensor 11 and presents a tactile sensation to the fingertip. The tactile sensation presented by the tactile sensation presentation unit 13 is controlled by the control unit 16 based on the pressing load detected by the load detection unit 12. At this time, the control performed by the control unit 16 will be described later.

  The tactile sensation to be presented may be any tactile sensation, and can be appropriately set according to the tactile sensation presenting the frequency, period (wavelength), amplitude, and waveform. Further, examples of a more realistic tactile sensation that improves a user's operational feeling include a tactile hard tactile sensation, a soft tactile sensation such as bull or buni, and a tactile sensation that can be recognized as vibration such as a bull. A clicked hard tactile sensation can be realized, for example, by presenting a sine wave of 200 Hz to 500 Hz for one period or a rectangular wave for one period. A soft tactile sensation such as a bull or bunny can be realized by, for example, presenting a sine wave of 200 Hz to 500 Hz for two or three periods. A tactile sensation that can be recognized as a vibration such as a bull can be realized by, for example, presenting a sine wave for four cycles or more.

  As described above, the input device according to the present embodiment is not limited to one having a touch panel. FIG. 2B is a diagram illustrating an example of a mounting structure of the input device 1 according to the present embodiment configured without using a touch panel. Note that FIG. 2B is a cross-sectional view of a main part of the input device 1 when a touch panel is not used.

  In the input device 1 shown in FIG. 2B, the user does not input (press input) the input code displayed on the display unit by pressing (press input), but physically presses the button or key. A press input is performed on this. As described above, in a configuration in which the touch sensor 11 is not used, the load detection unit 12 can also serve as the touch sensor 11. That is, in this case, if the load detection unit 12 detects a pressing load, the input to the touch sensor 11 is treated as being on, and if the load detection unit 12 does not detect the pressing load, an input to the touch sensor 11 is detected. Can be treated as being off. Each button or key needs to be assigned an arbitrary input code in advance.

  In the example shown in FIG. 2B, the load detection unit 12 is installed in the concave portion of the housing (base member) of the input device 1, and the tactile sensation providing unit 13 is arranged on the load detection unit 12. Therefore, the upper surface of the tactile sensation providing unit 13 can directly accept the user's pressing input, and the load detecting unit 12 detects the pressing load of the pressing input received by the tactile sensation providing unit 13. The tactile sensation providing unit 13 directly applies vibrations to the user's finger at an appropriate timing based on the pressing load detected by the load detecting unit 12. In this case, since the upper surface of the tactile sensation providing unit 13 functions in the same manner as a button or a key, the shape of the tactile sensation providing unit 13 that accepts a user's pressing input is the shape of the key top of the button. The function can be shown by specifying the function of the button.

  Note that in this embodiment, the structure of the input device 1 that does not use a touch panel is not limited to the structure shown in FIG. In the present embodiment, as the functional unit related to the input of the input device 1, at least the load detecting unit 12 that detects a pressing load of an input due to a user's pressing may be provided. Therefore, for example, by adding the load detection unit 12 to a conventional mechanical switch, or by using a conventional switch having this function, a function unit related to input of the input device of the present invention can be configured.

  FIG. 3 is a diagram illustrating a display example of the display unit 14 according to the present embodiment. The display unit 14 displays numbers from “0” to “9” for inputting the authentication code, and the user presses the input code to input the authentication code. In the figure, the user is pressing the input code “0”, and the touch sensor 11 detects an input to the input code “0”. At this time, the authentication code accepted by the pressing load detected by the load detection unit 12 changes. For example, as described above, the authentication code “0” is accepted as the first stage input when the pressing load is light, and the authentication code “0 ′” is accepted as the second stage input when the pressing load is heavy.

  The pressing load changes depending on the force with which the user presses the touch sensor 11 and is adjusted sensuously. For this reason, it cannot be visually observed. That is, only the user himself / herself can determine the difference (light and heavy) in the pressing load and is not recognized by others, so that the control unit 16 uses the pressing load detected by the load detecting unit 12. By changing the received authentication code, it is possible to prevent the authentication code from being leaked even if an input operation to the touch sensor 11 by the user is seen by another person.

  Next, the operation of the input device 1 according to this embodiment will be described. FIG. 4 is a flowchart for explaining the flow of authentication code acceptance processing by the input apparatus 1 according to this embodiment. The input device 1 in the present embodiment is a device that inputs an authentication code based on an input code pressed by a user and a pressing load detected at that time, and a load corresponding to each input code. Has multiple standards. When performing an authentication code accepting process using the input device 1, the user of the input device 1 recognizes that the input device 1 is an input device that accepts at least two stages of input in accordance with the pressing load. Suppose you are.

  In the present embodiment, an example will be described in which input is received in two stages according to the pressing load. Furthermore, in this embodiment, the pressing load for accepting the first-stage input is set. However, for example, it can be set when the input to the input code is detected by the touch sensor (pressing load ≠ 0N). is there.

  First, when the input device 1 is an ATM or the like jointly used by an unspecified number of users, a user's card (such as a cash card or a credit card) is inserted into the input device 1. Then, the control unit 16 reads the authentication code stored in the card and causes the storage unit 15 to store the authentication code. When the input device 1 is a personal dedicated terminal used only by a specific user, it is assumed that the storage unit 15 stores an authentication code in advance.

  The authentication code acceptance process by the input device 1 starts when the touch sensor 11 detects the user's pressing input. In the input device 1, the control unit 16 monitors whether or not the touch sensor 11 has detected an input to the input code displayed on the display unit 14 (step S100).

  When the touch sensor 11 detects an input to a certain input code, the control unit 16 determines whether or not the pressing load detected by the load detection unit 12 satisfies the first load standard (step S101). That is, it is determined whether the pressing load is increased by satisfying the first load criterion by increasing the force with which the user presses the touch surface of the touch sensor 11. Note that the first load reference is a threshold value of a predetermined pressing load that becomes a reference when receiving the first-stage input for the input code. When the load detection unit 12 detects a pressing load that exceeds this threshold, the control unit 16 processes that the first-stage input defined in the input device 1 has been received. In addition, the first load reference uses a predetermined pressing load set in advance as a threshold value, but may be changed later according to the preference of the operator.

  When the first load reference is detected in step S101, the control unit 16 performs processing on the assumption that the first-stage input of the input code that has been pressed is received (step S102).

  Next, the control unit 15 monitors whether or not a pressing load is detected by the load detection unit 12 (step S103). That is, it is determined whether or not the user continues pressing input. The case where the pressing input is continued (Yes in step S103) indicates a state where the pressing object is in contact with the touch sensor 11 and the pressing load is detected by the load detecting unit 12 (pressing load ≠ 0N). Further, the touch sensor 11 may be in a state where an input to the input code is detected. On the other hand, the case where the press input is finished (No in step S103) means that the press input is stopped by moving the pressed object away from the touch sensor 11. That is, it represents a state where no pressure load is detected by the load detection unit 12 (pressure load = 0N), or a state where no input to the input code is detected by the touch sensor 11.

  If no pressing load is detected at this stage (No at Step S103), the control unit 16 receives an authentication code corresponding to the input of the first stage of the input code (Step S106).

  When the pressing load is detected by the load detection unit 12 (step S103 Yes), the control unit 16 determines whether the pressing load detected by the load detection unit 12 satisfies the second load standard (step S104). ). The second load reference has the same meaning as the first load reference described above, and is a predetermined pressure load threshold value used as a reference when receiving the second-stage input for the input code.

  The control unit 16 repeats Steps S103 and S104 until the second load reference is detected (Yes in Step S104) or no pressing input is detected (No in Step S103). When the pressing load detected by the load detection unit 12 satisfies the second load standard (Yes in step S104), the control unit 16 performs processing on the assumption that an input of the second stage of the input code has been received (step S105). ).

And the control part 16 receives the authentication code corresponding to the input of the 2nd step of the input code received in step S105 (step S106). The “input code ′” represents a second-stage input for the input code.
If the received authentication code matches all the authentication codes stored in the storage unit 15, the user is determined to be a valid user.

  5 and 6 are diagrams illustrating an example of a change in pressing load when the authentication code described in FIG. 4 is received. Note that FIG. 5 shows a change in pressing load when accepting an input in the first stage, and FIG. 6 shows a change in pressing load when accepting an input in the second stage. Here, for convenience of explanation, the input code whose input is detected by the touch sensor 11 is “2”.

  FIG. 5 is a diagram illustrating an example of a change in pressing load during the processing of steps S100, S101, S102, S103, and S106 of the flowchart described in FIG.

  At the same time as the input to the input code “2” is detected by the touch sensor 11, the pressing load is detected by the load detection unit 12 (step S100). Thereafter, the pressing load increases (becomes heavier), and when the first load criterion (at the time of pressing) is satisfied at the time point P1, the control unit 16 sets “1” as the first step input of the input code “2”. 2 "is accepted (steps S101 and S102).

  At this time, the tactile sensation providing unit 13 presents a tactile sensation to the pressed object that is pressing the touch sensor 11 so that the user can accurately grasp that the first-stage input has been accepted. Unlike the sound and smell, the tactile sensation is not recognized by another person (a third person other than the user). Therefore, the control unit 16 controls the tactile sensation providing unit 13 to present the tactile sensation. Only the user can be notified that one-stage input has been accepted. Thereby, even if the input operation to the touch sensor 11 by the user is seen by others, the leakage of the authentication code can be prevented.

  After the first-stage input is accepted, if the user weakens the force pressing the touch sensor, the pressing load decreases (lightens). Then, when the pressing load is no longer detected by the load detection unit 12 and the pressing input is released, the control unit 16 accepts “2”, which is the first-stage input of the input code “2”, as an authentication code (Step S1). S103, 106).

  When the first load standard (at the time of release) is satisfied at the time point P1 ′ where the pressing load is decreasing, the tactile sensation providing unit 13 can also present a tactile sensation to the pressed object. When a mechanical switch or the like is actually pressed, the tactile sensation is transmitted to the finger when the switch is pushed in and when the finger is released (released) from the switch. For this reason, by presenting an appropriate tactile sensation at the time of pressing and releasing, it is possible to present a realistic click sensation as if the switch was pressed to the user even on the touch panel.

  Further, in the present embodiment, the authentication code is accepted when the pressure input is no longer detected. However, the present invention is not limited to this form, and the authentication code is used when the pressure load becomes a predetermined threshold value or less. May be accepted. For example, you may receive when it falls below the 1st load reference | standard (at the time of release) mentioned above. By presenting a tactile sensation when detecting the first load reference (when released) pressing load, the user can accurately grasp that the authentication code has been accepted. In addition, as described above, since the pressing load and the tactile sensation are senses that only the user can grasp, even if the operation of inputting the authentication code by another person is seen, the authentication code leaks. There is nothing.

  Next, changes in the pressing load when the second-stage input is accepted will be described with reference to FIG. FIG. 6 is a diagram illustrating an example of a change in pressing load during the processing of steps S100, S101, S102, S103, S104, S105, and S106 of the flowchart described in FIG.

  The processing until the control unit 16 accepts “2” as the first-stage input of the input code “2” is the same processing as steps S100, S101, and S102 of FIG. .

  After receiving “2” as the input code of the first stage, when the pressing input is continued without being released, the control unit 16 monitors whether the pressing load satisfies the second load criterion (step) S013, S104). When the pressing load increases and the second load standard is satisfied at the time point P2, the control unit 16 receives “2 ′” as the second-stage input of the input code “2” (step S105). And the control part 16 receives "2 '" as an authentication code (step S106).

  As described above, when the input to the input code is detected by the touch sensor 11, the control unit 16 receives an authentication code based on the input code and the pressing load detected by the load detection unit 12. Furthermore, the control part 16 is changing the authentication code with the press load detected by the said load detection part 12, when the input with respect to an input code is detected. The pressing load changes depending on the force with which the user presses the touch sensor 11 and is adjusted sensuously. For this reason, it cannot be visually observed. That is, only the user himself / herself can determine the difference in the pressing load and is not recognized by others, so the control unit 16 changes the authentication code accepted by the pressing load detected by the load detecting unit 12. By doing so, even if the input operation to the touch sensor 11 by the user is seen by another person, the leakage of the authentication code can be prevented.

  In the present embodiment, the second stage input is received after the first stage input is received. For example, the control unit 16 stores the received stage in the storage unit 15. Then, the stage of the finally received input code is accepted as an authentication code, or is overwritten in the storage unit 15 every time a stage for an input code is newly received, and finally the input code stored in the storage unit 15 These steps may be accepted as an authentication code.

  Further, as described above in the description of FIG. 5, even when the second load standard (during pressing) is satisfied, the tactile sensation providing unit 13 provides tactile sensation to the pressing object that is pressing the touch sensor 11. By presenting, the user can accurately grasp that the second-stage input has been accepted. Unlike the sound and smell, the tactile sensation is not recognized by another person (a third person other than the user). Therefore, the control unit 16 controls the tactile sensation providing unit 13 to present the tactile sensation. Only the user can be notified that the two-stage input has been accepted. Thereby, even if the input operation to the touch sensor 11 by the user is seen by others, the leakage of the authentication code can be prevented.

  Further, the tactile sensation providing unit 13 provides tactile sensation to the pressed object even when the second load standard (at the time of release) is satisfied so that the tactile sensation is exhibited when the first load reference (at the time of release) is satisfied. Can also be presented. As a result, it is possible to present the user with a more realistic click feeling as if the switch was pressed.

  In the above-described embodiment, the tactile sensations to be presented may be the same or different from each other in the first load standard and the second load standard. It may also be presented when either one of the load criteria is satisfied.

  In this way, the control unit 16 controls the tactile sensation providing unit 13 so as to present a change in the authentication code due to a pressing load by tactile sensation with respect to a pressed object pressing the touch surface. The tactile sensation is different from sounds and odors and is not recognized by another person (a third party other than the user). Therefore, the control unit 16 controls the tactile sensation providing unit 13 to present which tactile sensation. Only the user can be informed whether the stage input has been accepted. Thereby, even if the input operation to the touch sensor 11 by the user is seen by others, the leakage of the authentication code can be prevented.

  In addition, this invention is not limited only to each embodiment mentioned above, Many changes or deformation | transformation are possible.

  For example, in the present embodiment, the input device 1 has been described as an input device that accepts two-stage input according to the pressing load. However, the present invention is not limited to this form, and is an apparatus that accepts multiple-stage input. Is also applicable. Except for the final stage input, the above-described process of receiving the first stage input can be repeated. The last-stage input can be performed by the above-described second-stage input process. By providing a plurality of stages to accept in accordance with the pressing load, it becomes more difficult for others to determine what stage the user has input, and confidentiality is improved.

  In addition, an input device that accepts a plurality of steps of input in accordance with a pressing load can be applied to a button of an input device such as a mouse.

  In the above description, the load standard value is regarded as the “pressing load threshold value”, and the mode of determining that “the load standard is satisfied” when the load standard value is reached has been described. However, the mode in which it can be determined that “the load standard is satisfied” is not limited to this, and it can be assumed that several modes are included. For example, it can be determined that “the load criterion is satisfied” when the pressing load due to the user's pressing input to the input device 1 exceeds the value of the load criterion. It can also be determined that “the load criterion is satisfied” when a pressing load indicating the value of the load criterion is detected by the load detection unit 12.

DESCRIPTION OF SYMBOLS 1 Input device 11 Touch sensor 12 Load detection part 13 Tactile sense presentation part 14 Display part 15 Memory | storage part 16 Control part 20 Touch panel

Claims (3)

An input device for inputting an authentication code,
A display unit for displaying an input code for inputting the authentication code;
A touch sensor for detecting an input to an input code displayed on the display unit;
A load detection unit for detecting a pressing load on the touch surface of the touch sensor;
A control unit that controls to accept an authentication code based on the input code and the pressing load detected by the load detection unit when an input is detected with respect to the input code by the touch sensor; ,
An input device , wherein an operator can change a load reference of a pressing load that receives the authentication code . The input device according to claim 1,
The controller is
An input device that changes the authentication code by a pressing load detected by the load detection unit when an input to the input code is detected. The input device according to claim 2, wherein the input device further comprises:
A tactile sensation providing unit that vibrates the touch surface of the touch sensor;
The controller is
An input device that controls the tactile sensation providing unit so as to present a change in the authentication code due to the pressing load by tactile sensation with respect to a pressing object that is pressing the touch surface.