JP2015032118A - Terminal device, terminal control program, and terminal control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal device or the like configured to prevent the device from being unlocked by a third party.SOLUTION: The terminal device includes a calculation unit and a display control unit. The calculation unit of the terminal device calculates the number of intersections between a previous unlocking trajectory which is a trajectory of unlocking a first lock pattern displayed as an input screen in previous unlocking operation of the terminal device and a previous operation trajectory which is an operation trajectory in previous normal operation of the terminal device. When the number of intersections calculated is less than a predetermined value, the display control unit of the terminal device generates an input screen having a second lock pattern different from the first lock pattern, and displays it in unlocking operation of the terminal device.

Description

  The present invention relates to a terminal device, a terminal control program, and a terminal control method.

  Some terminal devices include a display with a touch panel in which a display device and an operation device are integrated. A terminal device provided with a display with a touch panel is operated mainly by touching the touch panel with a finger when the user performs an operation. Further, the terminal device locks the acceptance of the operation of the terminal device when the user is not using it in order to prevent an operation by a third party other than the user. The lock of the terminal device is released when, for example, a pattern connecting a plurality of reference points is input by tracing with a finger and matches a pattern registered in advance in the terminal device. For this reason, the operation trace at the time of unlocking remains by sebum etc. adhering to the display with a touch panel of the terminal device.

JP 2006-134209 A

  However, if the operation trace at the time of unlocking remains on the display with the touch panel of the terminal device, a pattern for unlocking may be inferred from the operation trace by a third party.

  In one aspect, it is to provide a terminal device, a terminal control program, and a terminal control method that can prevent the device from being unlocked by a third party.

  In one embodiment, the terminal device includes a calculation unit and a display control unit. The calculation unit of the terminal device includes a previous release locus that is a release locus of the first lock pattern displayed as an input screen during the previous unlock operation of the terminal device, and an operation locus during the previous normal operation of the terminal device. The number of intersections with a certain previous operation locus is calculated. Further, the display control unit of the terminal device generates an input screen having a second lock pattern different from the first lock pattern when the calculated number of intersections is less than a predetermined value, and locks the terminal device. Displayed during release operation.

  It is possible to prevent the device from being unlocked by a third party.

FIG. 1 is a block diagram illustrating an example of the configuration of the terminal device according to the embodiment. FIG. 2 is an explanatory diagram illustrating an example of a reference trajectory registration screen. FIG. 3 is an explanatory diagram illustrating an example of input of a reference trajectory. FIG. 4 is an explanatory diagram illustrating an example of accumulation of operation trajectories. FIG. 5 is a flowchart illustrating an example of the reference trajectory registration process of the terminal device. FIG. 6 is a flowchart illustrating an example of the operation reception process. FIG. 7 is a flowchart illustrating an example of normal operation accumulation processing of the terminal device. FIG. 8 is a flowchart illustrating an example of the unlocking process of the terminal device. FIG. 9 is a flowchart illustrating an example of the input screen generation process. FIG. 10 is an explanatory diagram illustrating an example of the previous release locus. FIG. 11 is an explanatory diagram illustrating an example of the previous operation locus. FIG. 12 is an explanatory diagram illustrating an example of calculating the number of intersections between the previous release locus and the previous operation locus. FIG. 13 is an explanatory diagram illustrating an example of the first input screen. FIG. 14 is an explanatory diagram illustrating an example of the second input screen. FIG. 15 is an explanatory diagram illustrating an example of generation of a release reference locus. FIG. 16 is an explanatory diagram illustrating an example of a display and a trajectory at the time of release and an operation trace after the release. FIG. 17 is an explanatory diagram illustrating an example of the relationship between the operation trace and the input screen. FIG. 18 is an explanatory diagram illustrating an example of a terminal device that executes a terminal control program.

  Hereinafter, embodiments of a terminal device, a terminal control program, and a terminal control method disclosed in the present application will be described in detail based on the drawings. The disclosed technology is not limited by the present embodiment. Further, the following embodiments may be appropriately combined within a consistent range.

  FIG. 1 is a block diagram illustrating an example of the configuration of the terminal device according to the embodiment. The terminal device 10 illustrated in FIG. 1 includes a detection unit 11, a display operation unit 12, a storage unit 13, and a control unit 14.

  The detection unit 11 is, for example, a power switch of the terminal device 10 and detects the start of the unlocking operation by the user. When detecting the unlocking operation, the detection unit 11 outputs a detection signal to the control unit 14.

  The display operation unit 12 is a display device for displaying various information and an input device for receiving various operations from the user. For example, the display operation unit 12 is realized by a liquid crystal display or the like as a display device. Further, for example, the display operation unit 12 is realized by a touch panel or the like as an input device. That is, in the display operation unit 12, the display device and the input device are integrated. The display operation unit 12 outputs the coordinates input by the user to the control unit 14. In the following description, it is assumed that the display and input coordinates on the display device and the input device are the same.

  The storage unit 13 is realized by, for example, a semiconductor memory device such as a random access memory (RAM) or a flash memory, or a storage device such as a hard disk or an optical disk. The storage unit 13 includes a reference locus storage unit 15, an operation locus storage unit 16, a release screen storage unit 17, and a release locus storage unit 18. The storage unit 13 stores information used for processing in the control unit 14.

  Here, the lock pattern and the locus will be described. The lock pattern is a pattern for release displayed on the display operation unit 12 when the terminal device 10 is unlocked. The terminal device 10 releases the lock by touching the pattern with a finger or the like so as to have a predetermined locus. The first lock pattern is a lock pattern displayed as an input screen during the previous unlocking operation of the terminal device 10. The second lock pattern is a lock pattern different from the first lock pattern, and is a lock pattern that is displayed as an input screen at the time of unlocking operation under a predetermined condition. The third lock pattern is a lock pattern that is displayed as an input screen when a locus serving as a reference for unlocking is registered.

  The locus is a locus operated by the user touching various screens displayed on the display operation unit 12 with a finger or the like. The locus is specified by the coordinates of the display operation unit 12. Further, when each lock pattern has a plurality of reference points, the locus includes the order in which the locus passes through the reference points. The reference locus is a locus serving as a reference for releasing the lock of the terminal device 10 input by the user with respect to the third lock pattern displayed as the input screen. The operation trajectory is an operation trajectory input by the user during normal operation of the terminal device 10 by the user. The release locus is a locus inputted by the user with respect to the first lock pattern displayed as the input screen when unlocking. The trajectory may be stored as a vector connecting not only all coordinates but also the start point, end point, and bending point of the trajectory.

  The reference locus storage unit 15 stores a reference locus. The reference trajectory is input by the user in advance by the initial setting of the terminal device 10 or the like. In addition, when the third lock pattern displayed as the input screen has a plurality of reference points during the unlocking operation, the reference locus storage unit 15 uses the reference locus as the order in which the operation locus passes through the reference points. Also memorize.

  The operation track storage unit 16 accumulates and stores operation tracks. The operation locus storage unit 16 accumulates and stores the coordinates of the display operation unit 12 as an operation locus. That is, the operation locus storage unit 16 accumulates and stores the coordinates touched on the screen displayed on the display operation unit 12 by the user during normal operation.

  The release screen storage unit 17 stores the screen having the first lock pattern displayed as the input screen when the terminal device 10 was previously unlocked as the previous release screen. In addition to the first lock pattern, the previous release screen stores the display position, orientation, and size of the first lock pattern on the display control unit 12.

  The release locus storage unit 18 stores the release locus input by the user for the first lock pattern displayed as the input screen. The release locus storage unit 18 stores the coordinates of the display operation unit 12 as a release locus.

  The control unit 14 is realized, for example, by executing a program stored in an internal storage device using the RAM as a work area by a CPU, an MPU (Micro Processing Unit), or the like. The control unit 14 may be realized by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). The control unit 14 includes a registration unit 19, an accumulation unit 20, a calculation unit 21, a display control unit 22, a generation unit 23, and a release unit 24, and has functions and functions of information processing described below. Realize or execute. Note that the internal configuration of the control unit 14 is not limited to the configuration illustrated in FIG. 1, and may be another configuration as long as information processing described later is performed.

  For the third lock pattern displayed on the display control unit 12 as an input screen, the registration unit 19 uses a reference trajectory as a reference trajectory for unlocking the terminal device 10 input from the display control unit 12 by the user. Register as For example, the registration unit 19 displays a button for registering the unlocked reference locus on the screen displayed on the display control unit 12 for the user to perform initial setting. When the user presses the button, the registration unit 19 displays a reference trajectory registration screen having a third lock pattern on the display control unit 12.

  FIG. 2 is an explanatory diagram illustrating an example of a reference trajectory registration screen. The reference trajectory registration screen 30 can specify coordinates by the X axis and the Y axis. For example, the registration unit 19 displays the third lock pattern 31 as an input screen at the center of the reference trajectory registration screen 30. When detecting a contact operation by the user on the reference trajectory registration screen 30, the registration unit 19 starts recording the coordinates of the trajectory, and registers the initial input coordinates in a buffer that is a temporary storage (not shown) of the storage unit 13. When the registration unit 19 detects a change in coordinates while the user continues the contact operation, the registration unit 19 accumulates the detected coordinates in the buffer of the storage unit 13 as a trajectory. When the registration unit 19 detects that the user has finished the contact operation, that is, when the finger or the like is released from the display control unit 12, the registration unit 19 registers the final input coordinates as an end point in the buffer of the storage unit 13. The registration unit 19 stores the coordinates and end points accumulated as the start point and the trajectory, that is, the acquired trajectory in the reference trajectory storage unit 15 as the reference trajectory.

  FIG. 3 is an explanatory diagram illustrating an example of input of a reference trajectory. In the example of FIG. 3, a state in which the user inputs a locus 32 with respect to the third lock pattern 31 displayed as the input screen on the reference locus registration screen 30 is shown. As shown in FIGS. 2 and 3, the third lock pattern 31 has reference points from No. 1 to No. 9, and the user has No. 1, No. 2, No. 3, No. 5, No. 7 of the reference points. , Suppose that a trajectory 32 passing through Nos. 8 and 9 is input. At this time, the registration unit 19 stores the trajectory 32 as a reference trajectory in the reference trajectory storage unit 15. Further, the registration unit 19 may store the order of passing through the reference points in the reference trajectory storage unit 15 together with the trajectory 32 as a reference trajectory.

  Returning to the description of FIG. 1, the accumulation unit 20 accumulates and stores the operation locus in the operation locus storage unit 16. When various screens are displayed on the display control unit 12 and the touch operation by the user is detected when the storage unit 20 is in the unlocked state, the storage unit 20 stores and records the detected coordinates in the operation track storage unit 16 as an operation track. The accumulation unit 20 may interrupt the accumulation of the operation locus in the middle when a predetermined amount of the operation locus is accumulated, for example, when the operation by the user is performed for a long time.

  FIG. 4 is an explanatory diagram illustrating an example of accumulation of operation trajectories. In the example of FIG. 4, when the user performs various operations on the screen 33 during normal operation, the operation track 34, the operation track 35, and the operation track 36 are sequentially operated. The accumulation unit 20 accumulates and records the operation locus 34, the operation locus 35, and the operation locus 36 in the operation locus storage unit 16.

  Returning to the description of FIG. 1, when the detection unit 11 receives a detection signal from the detection unit 11, the calculation unit 21 executes a lock release process. The calculation unit 21 reads the release locus of the first lock pattern displayed as the input screen when the terminal device 10 was previously unlocked from the release locus storage unit 18 and acquires it as the previous release locus. In addition, the calculation unit 21 reads the operation locus at the time of the previous normal operation of the terminal device 10 from the operation locus storage unit 16 and acquires it as the previous operation locus. The calculation unit 21 calculates the number of intersections between the previous release locus and the previous operation locus. The calculation unit 21 outputs the calculated number of intersections to the display control unit 22.

  When the number of intersections is input from the calculation unit 21, the display control unit 22 determines whether the number of intersections is equal to or greater than a predetermined value. The display control part 22 produces | generates the 1st input screen which has a 1st lock pattern, when the number of intersections is more than predetermined value. That is, the display control unit 22 generates a first input screen having a first lock pattern that is the same lock pattern as the previous unlocking. Here, the position of the first lock pattern on the first input screen is different from the position of the first lock pattern displayed as the input screen during the previous unlocking operation. Further, the first lock pattern of the first input screen does not change the positional relationship between the reference points such as No. 1 and No. 2. Note that the display control unit 22 may change the size of the first lock pattern.

  When the number of intersections is less than the predetermined value, the display control unit 22 generates a second input screen having a second lock pattern different from the first lock pattern. The position of the second lock pattern on the second input screen is set to a position and orientation different from the position of the first lock pattern displayed as the input screen at the previous unlocking operation. Here, the display control unit 22 reads the previous release screen from the release screen storage unit 17 when the first input screen or the second input screen is generated. The display control unit 22 generates the first input screen or the second input screen so that each lock pattern and the release trajectory do not have the same position and orientation as the previous release screen and the previous release trajectory. The display control unit 22 displays the generated first input screen or second input screen on the display control unit 12 and outputs it to the generation unit 23 and the release unit 24.

  The display control unit 22 receives an operation from the user after displaying the first input screen or the second input screen on the display control unit 12. When the display control unit 22 detects a contact operation by the user on the first input screen or the second input screen, the display control unit 22 starts recording the coordinates of the trajectory, and performs temporary storage (not shown) of the storage unit 13 with the first input coordinates as a starting point. Register in a buffer. When the display control unit 22 detects a change in coordinates while the user continues the contact operation, the display control unit 22 accumulates the detected coordinates in the buffer of the storage unit 13 as a locus. When the display control unit 22 detects that the user has finished the touch operation, that is, when the finger is removed from the display control unit 12, the display control unit 22 registers the final input coordinates as an end point in the buffer of the storage unit 13. The display control unit 22 acquires coordinates and end points accumulated as a start point and a locus, that is, a locus. The display control unit 22 outputs the acquired trajectory to the cancellation unit 24.

  When the first input screen or the second input screen is input from the display control unit 22, the generation unit 23 reads the reference locus from the reference locus storage unit 15. The generation unit 23 generates a release reference locus of the terminal device 10 based on the first input screen or the second input screen and the reference locus. The generation unit 23 outputs the cancellation reference trajectory to the cancellation unit 24.

  The cancellation unit 24 receives the trajectory acquired from the display control unit 22 and receives the cancellation reference trajectory from the generation unit 23. The canceling unit 24 compares the acquired trajectory with the canceling reference trajectory, and determines that the authentication has been established when the acquired trajectory matches the canceling reference trajectory. Note that the matching of the trajectories is not only a complete match, but also the order in which the order of passing through the reference points of the first lock pattern or the second lock pattern of the acquired trajectory passes through the reference points included in the release reference trajectory. Even if they match, the trajectories can be regarded as matching.

  When determining that the authentication is successful, the canceling unit 24 stores the first input screen or the second input screen input from the display control unit 22 in the canceling screen storage unit 17 as the previous canceling screen. Moreover, the cancellation | release part 24 memorize | stores the acquired locus | trajectory in the cancellation | release locus | trajectory memory | storage part 18 as a last cancellation | release locus | trajectory. The release unit 24 releases the lock of the terminal device 10 when the previous release screen and the previous release locus are stored.

  Next, operation | movement of the terminal device 10 of an Example is demonstrated.

  First, processing for registering a reference locus in the terminal device 10 will be described. FIG. 5 is a flowchart illustrating an example of the reference trajectory registration process of the terminal device. The registration unit 19 displays the reference locus registration screen 30 having the third lock pattern when the button for registering the unlocking reference locus provided on the screen for performing the initial setting is pressed by the user, for example. 12 (step S1).

  For example, the registration unit 19 displays the third lock pattern 31 as an input screen at the center of the reference trajectory registration screen 30, and executes an operation reception process (step S2). FIG. 6 is a flowchart illustrating an example of the operation reception process. The registration unit 19 determines whether or not a contact operation by the user is detected on the reference trajectory registration screen 30 (step S21). When the registration unit 19 does not detect the contact operation (No at Step S21), the registration unit 19 repeats Step S21 and waits for the contact operation by the user. When the registration unit 19 detects a contact operation (step S21: affirmative), the registration unit 19 starts recording the coordinates of the trajectory input by the user (step S22). The registration unit 19 registers the initial input coordinates as a start point in a buffer which is a temporary storage (not shown) of the storage unit 13 (step S23).

  The registration unit 19 determines whether or not the end of the contact operation by the user has been detected (step S24). When the registration unit 19 does not detect the end of the contact operation (No at Step S24), the registration unit 19 determines whether or not a change in contact coordinates is detected (Step S25). When the registration unit 19 detects a change in the coordinate to be touched (step S25: affirmative), the registration unit 19 accumulates the detected coordinate as a trajectory in the buffer of the storage unit 13 (step S26), and returns to step S24. If the registration unit 19 does not detect a change in contact coordinates (No at Step S25), the registration unit 19 returns to Step S24 because no new coordinates are generated. When the registration unit 19 detects the end of the contact operation (step S24: affirmative), that is, when it is detected that the user has removed a finger or the like from the display control unit 12, the storage unit uses the final input coordinates as the end point. 13 is registered in the buffer (step S27).

  Returning to the description of FIG. 5, the registration unit 19 stores the start point, coordinates, and end point registered or accumulated in the buffer, that is, the acquired trajectory in the reference trajectory storage unit 15 as a reference trajectory (step S3).

  The registration unit 19 of the terminal device 10 can acquire the locus operated by the user through the operation reception process. In addition, the registration unit 19 of the terminal device 10 can register a reference trajectory that is a trajectory serving as a reference for unlocking the terminal device 10 input by the user by the reference trajectory registration process.

  Next, a process for accumulating normal operations performed by the user on the terminal device 10 will be described. FIG. 7 is a flowchart illustrating an example of normal operation accumulation processing of the terminal device.

  The storage unit 20 determines whether a screen is displayed on the display control unit 12 (step S41). When the screen is not displayed on the display control unit 12 (No at Step S41), the storage unit 20 repeats Step S41 and waits until the screen is displayed on the display control unit 12. When the screen is displayed on the display control unit 12 (Yes at Step S41), the storage unit 20 determines whether or not the terminal device 10 is in the unlocked state (Step S42).

  If the terminal device 10 is not in the unlocked state (No at Step S42), the storage unit 20 returns to Step S41 and waits until it enters the unlocked state. When the terminal device 10 is in the unlocked state (step S42: affirmative), the storage unit 20 determines whether or not a contact operation by the user has been detected (step S43). When the storage unit 20 does not detect the contact operation by the user (No at Step S43), the storage unit 20 returns to Step S41 and waits until the contact operation by the user is detected. When the storage unit 20 detects a contact operation by the user (Step S43: Yes), the storage unit 20 stores and records the coordinates of the contact operation in the display operation unit 12 in the operation track storage unit 16 as an operation track (Step S44).

  The accumulation unit 20 determines whether or not the end of the contact operation by the user is detected (step S45). If the accumulation unit 20 does not detect the end of the contact operation by the user (No at Step S45), the contact operation by the user is continued, and the process returns to Step S44 to accumulate the operation locus. If the storage unit 20 detects the end of the contact operation by the user (step S45: Yes), the storage unit 20 returns to step S41 and waits until the contact operation by the user is detected again.

  The storage unit 20 of the terminal device 10 can acquire the operation locus of the terminal device 10 during the normal operation of the user by the normal operation storage process.

  Next, a process for releasing the lock of the terminal device 10 will be described. FIG. 8 is a flowchart illustrating an example of the unlocking process of the terminal device.

  When the detection signal that detects the start of the unlocking operation by the user is input from the detecting unit 11, the calculating unit 21 executes the unlocking process. Here, the detection signal is output from the detection unit 11 when the user presses a power switch or the like of the terminal device 10, for example. The calculation unit 21 executes an input screen generation process (step S51). FIG. 9 is a flowchart illustrating an example of the input screen generation process. The calculation unit 21 reads the release locus of the first lock pattern displayed as the input screen at the previous unlocking from the release locus storage unit 18 and acquires it as the previous release locus (step S511). FIG. 10 is an explanatory diagram illustrating an example of the previous release locus. In the previous lock release screen 37, the first lock pattern 38 is displayed as the input screen, and the release locus 39 is input by the user. At this time, when the unlocking unit 24 of the terminal device 10 is unlocked by the input of the release track 39, the release track 39 stores the release track 39 in the release track storage unit 18. Accordingly, the release locus 39 becomes the previous release locus in the current input screen generation process.

  Returning to the description of FIG. 9, the calculation unit 21 reads the operation locus at the previous normal operation from the operation locus storage unit 16 and acquires it as the previous operation locus (step S <b> 512). FIG. 11 is an explanatory diagram illustrating an example of the previous operation locus. On the screen 33 at the time of the previous normal operation, for example, an operation locus 34, an operation locus 35, and an operation locus 36 are input as operation locus on which the user performed various operations. At this time, the accumulation unit 20 of the terminal device 10 accumulates and records the operation locus 34, the operation locus 35, and the operation locus 36 in the operation locus storage unit 16. Therefore, the operation locus 34, the operation locus 35, and the operation locus 36 become the previous operation locus in the current input screen generation process.

  Returning to the description of FIG. 9, the calculation unit 21 calculates the number of intersections between the previous release locus and the previous operation locus, and outputs the calculated number of intersections to the display control unit 22 (step S513). FIG. 12 is an explanatory diagram illustrating an example of calculating the number of intersections between the previous release locus and the previous operation locus. As shown in FIG. 12, the release locus 39, which is the previous release locus, intersects the operation locus 35 and the operation locus 36, which are the previous operation locus, on the screen 33a at intersections 40a, 40b, 40c, and 40d. The calculation unit 21 counts the intersections 40a, 40b, 40c, and 40d and calculates that the number of intersections is four. Here, the intersection point may be obtained by comparing the coordinates of the previous release locus and the previous operation locus, or may be obtained by image processing on the image having a screen having each locus.

  Returning to the description of FIG. 9, when the number of intersections is input from the calculation unit 21, the display control unit 22 determines whether or not the number of intersections is equal to or greater than a predetermined value (step S514). If the number of intersections is equal to or greater than the predetermined value (step S514: Yes), the display control unit 22 generates a first input screen having the first lock pattern (step S515). FIG. 13 is an explanatory diagram illustrating an example of the first input screen. The first input screen 41 has a first lock pattern 38a having a different position and orientation from the first lock pattern 38 of the previous unlock screen 37 shown in FIG.

  Returning to the description of FIG. 9, when the number of intersections is less than the predetermined value (Step S514: No), the display control unit 22 generates a second input screen having a second lock pattern different from the first lock pattern. (Step S516). Note that any number can be used as the predetermined value, and any number can be used as long as the operation traces cannot be discerned by a third party. It can be. Here, the predetermined value is not limited to the exemplified number. FIG. 14 is an explanatory diagram illustrating an example of the second input screen. The second input screen 42 has a second lock pattern 43 that is different from the first lock pattern 38 of the previous unlock screen 37 shown in FIG. As shown in FIG. 14, the second lock pattern 43 extends or contracts the positions of the reference points such as No. 1 and No. 2 and replaces the arrangement of the reference points with respect to the first lock pattern 38. The lock pattern has a different release locus. The second lock pattern 43 is also different in position and orientation on the screen from the first lock pattern 38. In other words, the second lock pattern 43 is in a position and orientation such that the position and orientation of the lock pattern and the first lock pattern 38 of the previous unlock screen 37 are not the same. The second lock pattern 43 may be changed in size from the first lock pattern 38. The display control unit 22 outputs the generated first input screen or second input screen to the generation unit 23 and the release unit 24.

  Returning to the description of FIG. 9, when the first input screen or the second input screen is input from the display control unit 22, the generation unit 23 reads the reference trajectory from the reference trajectory storage unit 15. The generation unit 23 generates a release reference locus for unlocking the terminal device 10 based on the first input screen or the second input screen and the reference locus (step S517). The generation unit 23 outputs the cancellation reference trajectory to the cancellation unit 24. FIG. 15 is an explanatory diagram illustrating an example of generation of a release reference locus. The cancellation reference trajectory 44 is generated based on the reference trajectory 32 and the first input screen 41, for example. In the example of FIG. 15, the reference trajectory 44 for release is generated by rotating the reference trajectory 32 so as to correspond to the first lock pattern 38a. Here, the generation unit 23 may generate a release reference locus having each reference point corresponding to each reference point registered together with the reference locus 32 as the release reference locus 44.

  Returning to the description of FIG. 9, when the generation of the release reference locus 44 in the generation unit 23 is completed, the display control unit 22 displays the first input screen or the second input screen as the input screen on the display operation unit 12. (Step S518).

  The calculation unit 21, the display control unit 22, and the generation unit 23 of the terminal device 10 calculate the number of intersection points between the previous release locus and the previous operation locus by the input screen generation process, and display the calculated number of intersection points. The lock pattern can be changed. Moreover, the calculation part 21, the display control part 22, and the production | generation part 23 of the terminal device 10 can also change the position and direction on the screen of the lock pattern to display. Further, the terminal device 10 can easily determine that the release locus has been erased by the operation locus and cannot be read by a third party by calculating the number of intersections between the previous release locus and the previous operation locus.

  Returning to the description of FIG. 8, the display control unit 22 displays the first input screen or the second input screen on the display control unit 12, and then receives an operation from the user (step S52). Here, the operation reception process of step S52 is the same as the operation reception process of step S2 of the reference trajectory registration process except that the display control unit 22 executes in place of the registration unit 19, and thus the description thereof is omitted. The display control unit 22 acquires the start point, coordinates, and end point, that is, the trajectory registered or accumulated in the buffer by the operation reception process in step S52. The display control unit 22 outputs the acquired trajectory to the cancellation unit 24.

  When the trajectory acquired from the display control unit 22 is input and the canceling reference trajectory is input from the generation unit 23, the canceling unit 24 compares the acquired trajectory with the canceling reference trajectory (step S53). The cancellation unit 24 determines whether the acquired trajectory matches the cancellation reference trajectory and authentication is established (step S54). Here, if the cancellation reference trajectory is a cancellation reference trajectory having each reference point corresponding to each reference point registered together with the reference trajectory, the canceling unit 24 passes the trajectory obtained from each reference point. It may be determined that they match.

  When the authentication is established (step S54: affirmative), the canceling unit 24 stores the first input screen or the second input screen input from the display control unit 22 in the canceling screen storage unit 17 as the previous canceling screen ( Step S55). Moreover, the cancellation | release part 24 memorize | stores the acquired locus | trajectory in the cancellation | release locus | trajectory memory | storage part 18 as a last cancellation | release locus | trajectory (step S56). When the release unit 24 has completed storing the previous release screen and the previous release locus, the release unit 24 releases the lock of the terminal device 10 (step S57). When the authentication is not established (No at Step S54), the canceling unit 24 ends the process without unlocking the terminal device 10.

  The terminal device 10 generates a different input screen for each unlocking by the unlocking process, and when there are few operations by the user at the time of the previous unlocking, the terminal device 10 can be changed by changing the lock pattern. It is possible to prevent the device 10 from being unlocked.

  Next, the relationship between the operation trace at the time of unlocking and the input screen will be described. FIG. 16 is an explanatory diagram illustrating an example of a display and a trajectory at the time of release and an operation trace after the release. As shown in FIG. 16, in the display operation unit 12, when a release locus 39 is input by the user with respect to the first lock pattern 38 of the previous unlock screen 37, an operation is performed on the display operation unit 12 after unlocking. The trace 39a remains. In this case, it is conceivable that a third party reads the operation mark 39a on the display operation unit 12 and tries to release the lock.

  FIG. 17 is an explanatory diagram illustrating an example of the relationship between the operation trace and the input screen. As shown in FIG. 17, in the above-described embodiment, for example, even if the first lock pattern is the same as the previous unlocking, the first lock pattern 38a having a different position and orientation on the input screen 41 is used. Even when the three parties read the operation mark 39a and input the release locus, the release locus does not coincide with the release reference locus on the input screen 41, and the lock is not released. Specifically, in the example of FIG. 16, the release locus 39 passes through the reference points in the order of No. 1, No. 2, No. 3, No. 5, No. 7, No. 8, and No. 9, whereas FIG. The 17 operation marks 39a pass through the reference points in the order of No. 3, No. 2, No. 1, and No. 5. For this reason, even if a third party traces the operation trace 39a and inputs the release locus on the input screen 41 in FIG. 17, the reference point through which the release locus passes does not match the reference point of the release reference locus. The lock is not released.

  As described above, the terminal device 10 has the previous release locus that is the release locus of the first lock pattern displayed as the input screen during the previous unlock operation of the terminal device 10 and the operation during the previous normal operation of the terminal device 10. The number of intersections with the previous operation locus that is the locus is calculated. When the calculated number of intersections is less than the predetermined value, the terminal device 10 generates an input screen having a second lock pattern different from the first lock pattern, and displays it when the terminal device 10 is unlocked. As a result, the terminal device 10 can prevent the terminal device 10 from being unlocked by a third party.

  Further, when the calculated number of intersections is equal to or greater than a predetermined value, the terminal device 10 generates a first input screen having a first lock pattern and displays it when the terminal device 10 is unlocked. When the calculated number of intersections is less than the predetermined value, the terminal device 10 generates a second input screen having a second lock pattern different from the first lock pattern and displays it when the terminal device 10 is unlocked. As a result, the terminal device 10 can change the lock pattern based on the calculated number of intersections, that is, according to the operation amount during the normal operation of the user.

  Further, the terminal device 10 displays a reference locus registration screen having the third lock pattern, and registers in advance a locus of an operation for unlocking the terminal device 10 as a reference locus. The terminal device 10 accumulates an operation locus that is an operation locus during normal operation of the terminal device 10. The terminal device 10 generates a release reference locus for the terminal device 10 based on the first input screen or the second input screen and the reference locus. When the terminal device 10 determines that the locus input on the first input screen or the second input screen matches the release reference locus, the terminal device 10 unlocks the terminal device 10. As a result, the terminal device 10 can register the reference trajectory input by the user. In addition, the terminal device 10 can acquire a locus operated by the user. Further, the terminal device 10 can unlock the terminal device 10 even if the position and orientation of the lock pattern to be displayed on the screen are changed.

  The first lock pattern, the second lock pattern, and the third lock pattern of the terminal device 10 have a plurality of reference points. The reference trajectory of the terminal device 10 registers the reference points through which the trajectory of the operation for releasing the lock on the third lock pattern has passed. The terminal device 10 generates a release reference locus having each reference point corresponding to each reference point registered together with the reference locus as the release reference locus. As a result, the terminal device 10 compares the reference points through which the locus input to the first lock pattern or the second lock pattern has passed with the reference points of the release reference locus, thereby inputting the locus. It can be determined whether or not coincides with the release reference locus.

  Further, the terminal device 10 determines whether the trajectory input on the first input screen or the second input screen passes through each reference point of the release reference trajectory, the input trajectory, and the release reference trajectory. When it is determined that the two match, the terminal device is unlocked. As a result, the terminal device 10 is not limited to the case where the input trajectory and the canceling reference trajectory completely match, but the order in which the input trajectory passes through the reference points of the canceling reference trajectory is the same. In this case, the terminal device 10 can be unlocked.

  Moreover, in the said Example, although the 1st lock pattern or the 2nd lock pattern was arrange | positioned so that it might differ from the position and direction of the lock pattern at the time of last lock release, the local abrasion of the display operation part 12 surface is further prevented. You may do it. In order to prevent local wear on the surface of the display operation unit 12, the terminal device 10 has the first lock pattern or the second lock pattern so that the release locus at the time of unlocking is leveled over the entire surface of the display operation unit 12. The position and orientation can be changed. In addition, the size of the first lock pattern or the second lock pattern may be changed every time.

  In addition, each component of each part illustrated does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each part is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in arbitrary units according to various loads and usage conditions. Can be configured. For example, the operation reception process is executed by the registration unit 19 and the display control unit 22 in the above-described embodiment, but either one may be executed, or an operation reception unit may be provided separately.

  Furthermore, various processing functions performed in each device may be executed entirely or arbitrarily on a CPU (or a microcomputer such as an MPU or MCU (Micro Controller Unit)). The various processing functions may be executed entirely or arbitrarily on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or hardware based on wired logic. Needless to say, it is good.

  By the way, the various processes described in the above embodiments can be realized by executing a program prepared in advance on a terminal device. Therefore, in the following, an example of a terminal device that executes a program having the same function as that in the above embodiment will be described. FIG. 18 is an explanatory diagram illustrating an example of a terminal device that executes a terminal control program.

  The terminal device 100 that executes the terminal control program illustrated in FIG. 18 includes a detection unit 111, a RAM 112, a ROM (Read Only Memory) 113, a processor 114, and a display control unit 115. The detection unit 111 detects the start of the unlocking operation by the user. The processor 114 controls the entire terminal device 100. The display control unit 115 displays various information and accepts various operations from the user.

  The ROM 113 stores in advance a terminal control program that exhibits the same function as in the above embodiment. Note that the terminal control program may be recorded on a recording medium that can be read by a drive (not shown) instead of the ROM 113. The recording medium may be, for example, a portable recording medium such as a CD-ROM, a DVD disk, or a USB memory, or a semiconductor memory such as a flash memory. As the terminal control program, as shown in FIG. 18, there are a calculation program 113A and a display control program 113B. Note that the programs 113A and 113B may be integrated or distributed as appropriate. The RAM 112 stores a reference locus, an operation locus, a release screen, a release locus, and the like.

  Then, the processor 114 reads these programs 113A and 113B from the ROM 113, and executes each of these read programs. Then, as shown in FIG. 18, the processor 114 functions as the calculation process 114A and the display control process 114B for the programs 113A and 113B.

  The processor 114 performs a previous release locus that is a release locus of the first lock pattern displayed as an input screen during the previous unlock operation of the terminal device 100 and a previous operation that is an operation locus during the previous normal operation of the terminal device 100. The number of intersections with the trajectory is calculated. When the calculated number of intersections is less than the predetermined value, the processor 114 generates an input screen having a second lock pattern different from the first lock pattern, and displays it when the terminal device 100 is unlocked. As a result, unlocking of the terminal device 100 by a third party can be prevented.

DESCRIPTION OF SYMBOLS 10 Terminal device 11 Detection part 12 Display operation part 13 Memory | storage part 14 Control part 15 Reference | standard locus | trajectory memory | storage part 16 Operation locus | trajectory memory | storage part 17 Release | release locus | trajectory memory | storage part 19 Registration | Generation unit 24 Release unit

Claims (7)

Number of intersections between the previous release locus that is the release locus of the first lock pattern displayed as the input screen during the previous unlock operation of the terminal device and the previous operation locus that is the operation locus during the previous normal operation of the terminal device A calculation unit for calculating
A display control unit that generates an input screen having a second lock pattern different from the first lock pattern when the calculated number of intersections is less than a predetermined value, and displays the input screen when the terminal device is unlocked;
The terminal device characterized by having.   The display control unit generates a first input screen having the first lock pattern when the calculated number of intersections is equal to or greater than a predetermined value, displays the first input screen when the terminal device is unlocked, and calculates the calculated intersection. When the score is less than a predetermined value, a second input screen having a second lock pattern different from the first lock pattern is generated and displayed at the time of unlocking operation of the terminal device. The terminal device described. The terminal device further includes:
A registration unit that displays a reference trajectory registration screen having a third lock pattern and registers in advance a trajectory of an operation for unlocking the terminal device as a reference trajectory;
An accumulation unit that accumulates an operation locus that is an operation locus during normal operation of the terminal device;
Based on the first input screen or the second input screen and the reference trajectory, a generating unit that generates a cancellation reference trajectory for the terminal device;
A release unit that unlocks the terminal device when it is determined that the locus input on the first input screen or the second input screen matches the release reference locus;
The terminal device according to claim 2, comprising: The first lock pattern, the second lock pattern, and the third lock pattern have a plurality of reference points,
The reference trajectory is registered together with the reference points through which the trajectory of the unlocking operation on the third lock pattern has passed,
The said generation part produces | generates the cancellation | release reference locus | trajectory which has each reference point corresponding to each said reference point registered together with the said reference locus | trajectory as said cancellation | release reference | standard locus | trajectory. Terminal equipment.   The cancellation unit is configured to determine whether the trajectory input on the first input screen or the second input screen passes through the reference points of the canceling reference trajectory based on the order of the first input screen or the second input trajectory. The terminal device according to claim 4, wherein the terminal device is unlocked when it is determined that the trajectory input on the input screen matches the cancellation reference trajectory. On the terminal device,
The intersection of the previous release locus that is the release locus of the first lock pattern displayed as the input screen during the previous unlock operation of the terminal device and the previous operation locus that is the operation locus during the previous normal operation of the terminal device. Calculate the score,
When the calculated number of intersections is less than a predetermined value, an input screen having a second lock pattern different from the first lock pattern is generated, and a process to be displayed at the time of unlocking operation of the terminal device is executed. Characteristic terminal control program. The terminal device
The intersection of the previous release locus that is the release locus of the first lock pattern displayed as the input screen during the previous unlock operation of the terminal device and the previous operation locus that is the operation locus during the previous normal operation of the terminal device. Calculate the score,
When the calculated number of intersections is less than a predetermined value, an input screen having a second lock pattern different from the first lock pattern is generated and displayed when the terminal device is unlocked. A terminal control method.

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