JP4346652B2 - Information terminal and input method thereof - Google Patents

Description

  The present invention relates to an information terminal and an input method thereof, and more particularly to an information terminal having a function of receiving an input from a user and an input method thereof.

  Recent information terminals such as mobile phones and PDAs have become highly functional, and have various payment functions and can also store various private information. However, because of the portability of such information terminals, there is an increased risk of unauthorized use due to theft or misplacement of the terminals. Therefore, in general, when dealing with a payment function or private information, authentication for identity verification is performed in advance.

  Common personal authentication technologies include authentication based on knowledge such as PIN, authentication using possessions such as IC cards, biometrics based on physical characteristics such as fingerprints, irises and veins, and gesture authentication based on behavioral characteristics such as gestures. Etc. are known. In particular, authentication by biometrics is highly convenient because it is not necessary to store a password or possess a specific item, and is also implemented in an information terminal.

  Conventional information terminals are known as input devices that include dial keys, cameras, microphones, acceleration sensors, touch sensors, and the like. The user performs an input operation from such an input device of the information terminal and performs authentication. Input methods include key operations such as passwords, image recognition such as fingerprint images, voice recognition such as voiceprints, gesture recognition, and pen input.

JP 2002-32852 A (summary)

  Here, authentication generally refers to two types of information: (1) what authentication technology is used, and (2) information itself that is a key for authentication (for example, a password, a fingerprint of the person). It can be said that it is done by combining them.

  On the other hand, the information terminal can be used everywhere at any time due to its portability. Therefore, there are many people in the vicinity while the user performs input for authentication. For this reason, there is a high possibility that the state of the operation and the content of the operation will be peeped by surrounding people. As a result, what kind of authentication technology is used, and in some cases, the information itself that is the key to be authenticated may be exposed.

  In particular, biometric authentication uses physical features that can be observed from the outside, such as fingerprints, irises, and voiceprints, and therefore may be stolen or forged from, for example, residual fingerprints or photographs. In fact, for example, in the case of biometrics authentication using fingerprints, research results have been reported that authentication systems can be tricked with artificial fingers made of gummy. Since biometric authentication uses physical characteristics unique to the user as key information, once the key information is stolen, the authentication method itself must be changed.

  Furthermore, in the case of an information terminal, it is not desirable to impair the simplicity of the operation used for authentication, and it must be possible to achieve in a short time without taking complicated procedures. Therefore, it is difficult to introduce a complicated procedure even though it prevents information leakage.

  Patent document 1 is disclosing the portable payment terminal device which has a cover for concealing input key operation. However, this technique is limited to an authentication method of inputting a personal identification number, and merely hides the personal identification number itself as a key for authentication, and the fact that the authentication operation itself is performed is exposed by using the cover.

  As a method for avoiding the above problem, a method that does not involve an operation, for example, a computer called BCI (Brain Computer Interface), which directly connects an electrical signal flowing in a human brain to a computer, without thinking about a physical operation. An interface that allows the user to operate the device, and a method to capture the operator's intention based on minute movements and biological reactions like a lie detector have been devised. However, it is difficult to easily introduce such a method to the input of the information terminal, and the user himself / herself performs a large operation that can be observed unintentionally and does not intend to perform a minute operation. However, there is a danger that surrounding people will be able to observe the state of authentication.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a method for performing input such as authentication so as not to be observed from the surroundings, and an information terminal capable of executing such an input method. It is to provide.

In order to achieve the above object, according to the present invention, an information terminal according to claim 1 corresponds to a housing, a sensor that is touched by the user and detects a user input operation, and a predetermined input signal. A memory in which a user input operation is registered, a signal analysis unit that is installed in the housing and determines whether an input signal corresponding to the input operation detected by the sensor is registered in the memory; and the sensor obtain Bei and a vibration element for vibrating the sensor when the input operation of the user detected is larger than the threshold value.

According to this configuration, by vibrating the vibration element, it is possible to notify the user when the user's input operation is an excessive operation, or to conceal the user's input operation by vibration.
According to a second aspect of the present invention, there is provided a housing, a sensor that detects an input operation of the user when touched by the user, a memory in which the input operation of the user corresponding to a predetermined input signal is registered, and the housing A signal analyzer that determines whether or not an input signal corresponding to an input operation detected by the sensor is registered in the memory; and while the sensor detects a user input operation, And a vibration element that continues to vibrate.
According to this configuration, it is possible to input without observing the input operation around by vibrating the vibration element.

The invention according to claim 3 is the information terminal according to claim 1, wherein the signal analysis unit has a comparison variable based on the magnitude of the operation input from the sensor being equal to or greater than a predetermined maximum value. A vibration element is vibrated so as to vibrate the sensor.

  According to this configuration, by vibrating the vibration element, it is possible to notify the user when the user's input operation is an excessive operation.

A fourth aspect of the present invention is the information terminal according to the second aspect , wherein the signal analyzing unit outputs only an input signal corresponding to an input operation detected by the sensor while the vibration element vibrates. Output.

  According to this configuration, the user's input operation can be concealed by vibrating the vibration element.

A fifth aspect of the present invention is the information terminal according to the second or fourth aspect , wherein the signal analyzing unit vibrates the vibration element based on a magnitude of an operation input from the sensor.

  According to this configuration, the user's input operation can be concealed by vibrating the vibration element.

A sixth aspect of the present invention is the information terminal according to any one of the first to fifth aspects, wherein the signal analyzing unit determines a vibration component of the vibration element from a magnitude of an operation input from the sensor. Remove.

  According to this configuration, a more accurate input operation can be detected.

Invention according to claim 7, an information terminal according to any one of claims 2, 4 and 5, in the signal analyzer, vibration control parameters for vibrating said vibrating element, the user the vibration of keeping One One prior Symbol vibrating element contact with the sensor is set so as to conceal the input operation of the user with.
According to this configuration, a more accurate input operation can be detected.
The invention according to an eighth aspect is the information terminal according to any one of the second, fourth, and fifth aspects, wherein the signal analysis unit is configured to detect the vibration element from the magnitude of the operation input from the sensor. In the signal analysis unit, the vibration control parameter for vibrating the vibration element is set so that the vibration of the vibration element conceals the user's input operation while maintaining the contact between the user and the sensor. Has been.

  According to this configuration, a more accurate input operation can be detected.

A method in accordance with claim 9, the signal comprising: sensor before Symbol information terminal detects the input operation of the user, the input signal corresponding to the operation of the sensor is detected, whether or not it is registered in the memory an analysis unit determines the step, prior SL and a step of vibrating the vibrating element to vibrate the sensor is any one of information ends at the end of the operation method 請 Motomeko 1 to 8.

  According to this configuration, by vibrating the vibration element, it is possible to notify the user when the user's input operation is an excessive operation, or to conceal the user's input operation by vibration.

  As described above, according to the present invention, it is possible to perform input to the information terminal by an operation that is not observed by surrounding humans.

  The present invention also provides an information terminal and input method capable of such input.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First embodiment>
FIG. 1 shows a mobile phone as an example of an information terminal according to the present invention. The mobile phone 1 includes a housing 2, a screen, input keys, a sensor 5, a vibration element (vibrator) 6, a signal analysis unit 7, a memory and a control unit (not shown). The vibration element 6 and the signal analysis unit 7 are built in the housing 2. Although the sensor 5 is also built in the housing 2, it is installed so as to be partially exposed on the surface of the housing 2 in order to detect a user input operation.

  The sensor 5 is set to a high sensitivity so that a minute movement of the user can be detected. Specifically, it may be an impedance sensor (contact impedance between skin and sensor) detection sensor composed of a pressure sensor or two electrodes, or a photoelectric sensor (irradiates the skin with light and measures its reflected light intensity). A sensor that measures other physical quantities may be used. However, it is necessary to increase the sensitivity to such an extent that a minute operation can be detected. Further, when the finger (or skin) is not in contact, in order to prevent the sensor from recognizing that there is contact due to the surrounding environment, for example, a finger is combined with the sensor 5 by combining a touch sensor or the like. It is desirable to detect an input signal only when the touch sensor senses contact.

  The signal analysis unit 7 is functionally connected to the sensor 5, the vibration element (vibrator) 6, and the memory, so that the user's input to the sensor 5 is a minute operation that is not observed from the surroundings. While guiding the user, the input signal is confirmed by collating the input from the sensor 5 with the record of the input operation stored in advance in the memory, and the input signal is output to the control unit.

  The signal analysis unit 7 takes in the output from the sensor 5 and analyzes the output from the sensor 5 to identify the micro operation, and the input micro operation is registered in advance in the registration operation table of the memory. It is determined whether or not they coincide with each other, and if they coincide with the registration operation, a corresponding input signal is output to the control unit, and further control such as vibration start / stop, adjustment of rhythm and intensity can be performed. .

  The vibration element 6 vibrates the mobile phone 1 based on an instruction from the signal analysis unit 7. The vibration element 6 is not necessarily required to vibrate the entire mobile phone 1, and it is sufficient if the sensor 5 and the finger in contact with the sensor 5 vibrate more than the minute operation of the user.

  When starting the input method according to the present invention, the user performs an input mode setting operation by a minute operation. This can be set by operating a special key of the input key of the mobile phone 1 in step 101 of FIG. For example, in the case of a foldable phone, the minute operation input mode can be automatically set when the information terminal is opened or when the user touches the information terminal. It is also possible to set the mobile phone in advance so that the input by the minute operation is automatically performed when the mobile phone is used. In this case, it is not necessary to set the input mode for each minute operation input.

  Next, in step 102, the sensor 5 detects an action performed by the user with the fingertip. The output from the sensor 5 is sent to the signal analysis unit 7. As will be described later, the signal analysis unit 7 determines whether the output from the sensor 5 is a user's intentional input or noise. Move to. In step 103, it is determined whether the operation performed by the user is excessive, that is, whether the operation is observable from surrounding humans. If it is determined that the input operation is excessive, the signal analysis unit 7 of the mobile phone 1 vibrates the vibration element 6 (step 104), and then returns to step 102 after finishing the vibration and the next user input operation. Wait for detection. On the other hand, when it is determined in step 103 that the minute motion is not excessive, the signal analyzing unit 7 determines whether or not the minute motion currently analyzed is a motion registered in advance (step 105).

  If it is determined in step 105 that the micro motion analyzed in step 105 is not a motion registered in advance, the signal analysis unit 7 returns to step 102 and waits for detection of the next user input motion. If it is determined that the analyzed minute motion is a motion registered in advance, an input signal corresponding to the registered input motion is output to the control unit (step 106).

  FIG. 4 shows details of processing performed by the signal analysis unit 7 in 102 and 103 of FIG. Steps 201 to 203 in FIG. 4B correspond to step 102 in FIG. 3, and step 204 corresponds to step 103. FIG. 4A is a process of determining whether or not there is a minute operation of the user by the process of FIG. 4B and using the timing at which the minute operation occurs as determination information when calculating the matching with the registration operation. Here is an example. FIG. 4A shows the transition of the output value from the sensor 5 and whether the output value is determined to be “minor operation” or “excessive operation”.

  FIG. 4B shows a process flow in which the output value shown in FIG. The signal analysis unit 7 first detects the output from the sensor 5 in step 201. This can be estimated from the output value of the sensor, or can be detected using a separate touch sensor. In step 202, the peak is detected by determining whether or not there is a peak in the time series data of the output from the sensor 5. If no peak is detected, it is determined that the user has not input anything yet, and the signal analysis unit 7 returns to step 201 and waits for the next sensor output. When a peak is detected, the signal analysis unit 7 proceeds to step 203, and determines whether the peak is due to the user's intentional action, unconscious action or noise. More specifically, it is known that a relatively large peak is observed in the case of intentional movement, but a relatively small peak tends to be observed in the case of unconscious movement or noise. Therefore, the signal analysis unit 7 sets a first threshold value (an example of a predetermined minimum value) for distinguishing between the two in order to determine whether the detected peak value is either of the two, and the detected peak The determination is made by comparing the value with the first threshold. Here, the peak value (an example of a comparison variable based on the output value from the sensor 5) used for comparison with the first threshold is specifically the vibration width of the peak or the maximum amplitude fluctuation per unit time (that is, (Time differential value of the output from the sensor 5), but determination may be made based on other data. Here, “peak value” and “comparison variable” are used as a general term for these numerical values. If it is determined in step 203 that the detected peak value is smaller than the first threshold value, the detected peak value is determined as an unconscious action or noise, and the signal analysis unit 7 returns to step 201 and waits for the next output. . If it is determined that the detected peak value is greater than the first threshold value, it is determined that the detected peak value is a conscious action, and the signal analyzing unit 7 proceeds to step 204.

  In step 204, the signal analysis unit 7 determines whether the detected user movement is a minute movement that is not seen from the surroundings or a movement that can be observed by surrounding humans. A second threshold value (an example of a predetermined maximum value) is set as a boundary value between a minute motion that cannot be seen from the surroundings and an observable motion. If it is determined in step 204 that the detected peak value is larger than the second threshold value, it is determined that the user's input operation is an excessive operation, and the signal analysis unit 7 starts vibration of the vibration element 6 (step 104). By applying the vibration, the user's operation is obscured by the vibration, and the user realizes that the current input operation is excessive. Thereafter, the signal analyzing unit 7 returns to step 102 and waits for input of further user action.

  If it is determined in step 204 that the detected peak value is smaller than the second threshold value, the signal analysis unit 7 determines that the user action is a minute action. Thereafter, the signal analyzing unit 7 moves to step 105 and determines whether or not the user's input operation is a registration operation with reference to the registration operation table of FIG. 2 registered in the memory. When it is determined that the user input operation is a registration operation, the signal analysis unit 7 outputs a corresponding input signal to the control unit (step 106). FIG. 4A shows a determination result obtained through such a process. The first and second threshold values can be experimentally set in advance.

  The registration operation table shown in FIG. 2 may be set in advance by the manufacturer of the mobile phone 1 or may be individually set by the user after purchase. Anything that defines whether to correspond can be used. For example, in FIG. 2, operation 1 is a rhythm called “ton-ton-ton-ton-ton” and corresponds to the input signal of password 1. The operation 2 is a rhythm called “ton-ton-ton-ton-ton”, and corresponds to the input signal of the password 2. As the determination information used in this table, for example, timing or rhythm at which the user performs a minute operation is used, but other information can also be used as the determination information. In addition, if a specific user micro operation is associated with an input for personal authentication, the user can clear the personal authentication process by performing the corresponding micro operation. In addition, an allowable error range can be included in the registration operation table of FIG. 2 to indicate a range that is allowed as an error even if the operation actually performed by the user differs from the registration operation.

<Other embodiments>
FIG. 5 is a flowchart of an input processing process according to the second embodiment of the present invention. The difference between the input processing process of FIG. 5 and the input processing process of FIG. 3 is that in this embodiment, the input operation of the signal analysis unit 7 user can be accepted only while the vibration element 6 is vibrating. . Therefore, in the input processing process of FIG. 3, it is determined in step 103 whether or not the user's operation is an excessive operation, whereas in the corresponding step 305 of the input processing process of FIG. In step 306, it is determined whether or not the user input operation is a registration operation. The vibration of the vibration element 6 is controlled independently of the determination of the user input operation, but the start and end of the vibration correspond to the progress of the user input operation determination process. For example, in the process of FIG. 5, after the user sets the input mode in step 301, vibration is started when any input is detected in step 302 (corresponding to step 201 in FIG. 4B) (step 303). The input detection in step 302 can be estimated from the output value of the sensor, or can be detected using a separate touch sensor. Thereafter, it is determined in step 304 whether or not the input detected in step 302 is a user action. If it is determined that the input is a user action, the process proceeds to step 305 and whether or not the user action is detected during vibration. Determine. Here, step 304 corresponds to steps 202 and 203 in FIG. If the user action is performed during vibration, it is determined in step 306 whether the user action is a registration action. If it is a registration operation, the vibration is terminated at step 307 and an input signal is output at step 308. If it is determined in step 306 that the user action is not a registration action, if it is determined in step 305 that it is not a vibrating user action, and if it is determined in step 304 that the input is not detection of a user action, At 309, the vibration is terminated, and the process returns to step 302 to wait for a new input. The vibration rhythm, period, and the like may be controlled independently, and the vibration element 6 may be set to continue to vibrate for a certain period. Further, it may vibrate constantly, in accordance with a predetermined pattern, or randomly regardless of the input operation.

  In the input processing process according to this embodiment, the user can input without input consciously trying to make the input operation minute and without observing the input operation around.

  FIG. 6 is a flowchart of an input processing process according to the third embodiment of the present invention. The difference between the input processing process of FIG. 6 and the input processing process of FIG. 5 is that in this embodiment, it is not determined whether or not vibration is occurring. In this case, since the people around the user pay attention to the vibration of the mobile phone, they do not pay attention to the operation of the user. As a result, the user input operation is hidden.

  In the process of FIG. 6, after the user sets the input mode in step 401, vibration is started when any input is detected in step 402 (step 403). The input detection in step 402 can be estimated from the output value of the sensor, or can be detected using a separate touch sensor. After determining whether or not the user action is a registration action (step 405), or after determining that the input is not a detection of the user action (step 404), the vibration is ended in step 406 or step 408. It has become. The vibration rhythm, period, and the like may be controlled independently, and the vibration element 6 may be set to continue to vibrate for a certain period. Further, the vibration may be performed in a steady vibration, in accordance with a predetermined pattern, or randomly, regardless of the input operation.

  In the input processing processes according to the second and third embodiments, only the user input operation that is performed while the vibration element 6 is vibrating is accepted. During vibration, even if the user's input operation is the same, the output from the sensor 5 tends to increase due to the vibration of the vibration element 6. Therefore, it is desirable to match the first threshold value used in step 203 corresponding to steps 304 and 404 with the state of vibration.

  FIG. 7 is a flowchart of an input processing process according to the fourth embodiment of the present invention. The difference between the input processing process of FIG. 7 and the input processing process of FIG. 6 is that in this embodiment, the vibration of the vibration element 6 depends on the magnitude of the input operation, that is, the magnitude of the output value from the sensor 5. Is the point to be controlled. In step 501, the input mode of the present embodiment is set. If any input is detected in step 502, vibration of the vibration element 6 is started in step 503. The input detection in step 502 can be estimated from the output value of the sensor, or can be detected using a separate touch sensor. Thereafter, in step 504, it is determined whether or not the sensor 5 has detected a user input operation. If it is determined that the input operation of the user has been detected, the signal analysis unit 7 extracts a vibration control parameter for controlling the vibration element 6 in step 505. As the vibration control parameter of the vibration control by the signal analysis unit 7, for example, there is control of the vibration intensity, rhythm, frequency, direction, and the like of the vibration element 6 using the amplitude value of the output from the sensor 5.

  In step 506, the signal analysis unit 7 controls the vibration element 6 based on the extracted vibration parameter. More specifically, the vibration is controlled according to a predetermined function so that a large vibration is applied when the output from the sensor 5 is small and a small vibration is applied when the output is large. For example, such a function provides a third threshold value for the output value from the sensor 5, and applies a predetermined small vibration when the output value is larger than the third threshold value, and applies a predetermined large vibration when the output value is small. Can be. Alternatively, a function having an inverse correlation with the output value from the sensor 5 may be used. Further, the vibration control in step 506 may be performed not only by the magnitude of the vibration but also by changing the rhythm of the vibration.

  This makes it difficult for surrounding humans to observe the user's minute input operations, and prevents the user's input operations from being observed.

  Here, as the vibration control parameters, the frequency, intensity, rhythm, direction, etc. of the vibration can be raised, and any parameters need to be set appropriately as compared with the output of the sensor 5. When the frequency of vibration is too low or the strength is too strong, the finger moves away from the sensor 5 due to vibration, and a large output is observed from the sensor 5 when the finger and the sensor 5 come into contact again. On the other hand, when the frequency of vibration is too high or the strength is too weak, a surrounding person can observe the user's minute movement. In particular, when the direction of vibration does not coincide with the user's minute movement, the user's minute movement is easily observed in the surroundings. In order to avoid these, it is necessary to set the parameters of the vibration control appropriately, that is, while maintaining the contact between the user and the sensor 5 and concealing the user's input operation by the vibration of the vibration element 6. Such parameters can be obtained by experiments, and furthermore, a sensor (rigid body) and a finger (flexible flexible object) can be modeled and obtained by simulation.

  In addition, it is not preferable that the output value from the sensor 5 is mixed with the vibration component from the vibration element 6. Therefore, the signal analysis unit 7 can also remove the vibration component from the vibration element 6 in the output from the sensor 5. In this case, the vibration analysis unit 7 grasps on / off of vibration control of the vibration element 6 and parameters to be controlled. For example, when the signal analysis unit 7 applies vibration of frequency X hertz to the vibration element 6, the vibration component of X hertz is also mixed in the output from the sensor 5. However, generally, the frequency component of vibration is set higher than the frequency component of the user's minute movement. Therefore, the vibration applied to the vibration element 6 can be removed by a band rejection filter, a low-pass filter, or the like.

  Further, the vibration control parameter of the vibration element 6 must reliably hide the user's minute operation. In the case where the user tends to perform an excessive input operation, if the vibration of the vibration element 6 is too small, the excessive input operation will be observed by surrounding people. Therefore, it is desirable to conceal the user's excessive input operation by increasing the amplitude value of the vibration. On the other hand, when the user is proficient in the input method according to the present invention and can be assumed that an excessive input operation is not performed, it is not necessary to make the vibration of the vibration element 6 larger than the user's minute operation. Vibration can be used as force feedback. In addition, when the vibration of the vibration element 6 is a vibration having only a constant frequency, the minute movement of the user is an unsteady movement, and thus even a minute movement may be sensed. Therefore, the concealment effect can be enhanced by controlling the vibration element 6 so that the frequency, intensity, and the like of vibration change. What kind of vibration should be used and how to change the vibration need only be set for each user, and specific vibration control parameters should be used for experiments, simulations, etc. so that the concealment effect can be exhibited well. Can be determined by.

  In the above embodiment, a mobile phone has been described as an example of an information terminal. However, the information terminal according to the present invention is not limited to this example, and accepts input from a user such as a handheld device such as a PDA or a network terminal. Any information terminal is included.

  According to the present invention, it is possible to perform input such as authentication by an operation that is not observed by surrounding humans. The present invention also provides an information terminal capable of executing such an input method.

It is a block diagram which shows the outline | summary of the mobile telephone concerning one Embodiment of this invention. It is a figure which shows the example of the registration operation | movement table in the memory of the mobile telephone concerning one Embodiment of this invention. It is a flowchart which shows the input method concerning one Embodiment of this invention. (A) is an example of the display graph of the output result from a sensor by the input method concerning one embodiment of the present invention. (B) is a flowchart which shows a part of input method concerning one Embodiment of this invention. It is a flowchart which shows the input method concerning another embodiment of this invention. It is a flowchart which shows the input method concerning another embodiment of this invention. It is a flowchart which shows the input method concerning another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Case 5 Sensor 6 Vibration element 7 Signal analysis part

Claims (9)

A housing,
A sensor that is contacted by the user to detect the input operation of the user;
A memory in which user input operations corresponding to predetermined input signals are registered;
A signal analysis unit that is installed in the housing and determines whether or not an input signal corresponding to an input operation detected by the sensor is registered in a memory;
And wherein the obtaining Bei and a vibration element for vibrating the sensor when the input operation of the user which the sensor detects is greater than the threshold value, the information terminal.   A housing,
  A sensor that is contacted by the user to detect the input operation of the user;
  A memory in which user input operations corresponding to predetermined input signals are registered;
  A signal analysis unit that is installed in the housing and determines whether or not an input signal corresponding to an input operation detected by the sensor is registered in a memory;
  An information terminal comprising: a vibration element that continues to vibrate the sensor while the sensor detects a user input operation. Wherein the signal analysis section, when the comparison variables based on the size of the operation input from the sensor is equal to or greater than a predetermined maximum value, characterized in that vibrating the vibrating element to vibrate the previous SL sensors, claim 1. The information terminal according to 1. The information terminal according to claim 2 , wherein the signal analysis unit outputs only an input signal corresponding to an input operation detected by the sensor while the vibration element vibrates. The information terminal according to claim 2 , wherein the signal analysis unit vibrates the vibration element based on a magnitude of an operation input from the sensor. The signal analysis unit, and removing the vibration components of the vibrating element from the size of the operation input from the sensor, the information terminal according to any one of claims 1 to 5. In the signal analyzer, vibration control parameters for vibrating said vibrating element, that vibrations of keeping One One prior Symbol vibrating element contact between the user and the sensor is not set to conceal the input operation of the user The information terminal according to any one of claims 2 , 4 , and 5 , characterized by:   The signal analysis unit removes the vibration component of the vibration element from the magnitude of the operation input from the sensor,
  In the signal analysis unit, the vibration control parameter for vibrating the vibration element is set such that the vibration of the vibration element hides the user's input operation while maintaining contact between the user and the sensor. The information terminal according to any one of claims 2, 4, and 5. A step of the sensor before Symbol information terminal detects the input operation of the user,
A step of determining whether an input signal corresponding to an operation detected by the sensor is registered in a memory ;
Characterized by a step of vibrating the vibrating element to vibrate the previous SL sensors, the operation method of the late information system according to any one of 請 Motomeko 1 to 8.

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