JP2012155501A - Portable terminal, password input program and password input method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a password input by a user hardly leak to a third person by making it difficult for a third person to specify a character string configuring an input password since the third person is not able to recognize a depth position associated with an input character.SOLUTION: A portable telephone set 10 executes authentication processing based on an authentication password and an input password. Soft keys (68) with different depth of a character input key are displayed on a 3D display 30, and an operation to the character input key is detected by a touch panel 38 and a touch control circuit 36 installed on the 3D display 30. For example, when the character input key of "E" is operated while displayed at the front position, the character of "E" and the front position are stored so as to be associated with each other. When a front position key is operated by a user, only the character of "E" with which the front position has been associated is determined as a character string configuring the input password.

Description

  The present invention relates to a mobile terminal, and more particularly, to a mobile terminal that can execute an authentication process using a preset authentication password.

2. Description of the Related Art Conventionally, portable terminals that can execute an authentication process using a preset authentication password are widely known, and an example of this type of device is disclosed in Patent Document 1. The mobile phone of this background art is provided with a screen display unit having a touch panel function. In addition, a touch panel numeric keypad used when inputting a personal identification number is displayed on the touch panel screen of the screen display unit. Then, the user virtually rearranges the numerical arrangement displayed on the touch panel numeric keypad to convert and input the personal identification number. Thereby, even if a surrounding third party directly steals the number input by the user, it becomes difficult to notice the password entered by the user.
JP 2009-119581 A [G06F 21/20, G06F 3/041, H04L 9/32]

  However, in the mobile phone of Patent Document 1, when a QWERTY keyboard such as an alphabet is adopted instead of the numeric keypad, the conversion rule becomes complicated because the number of keys increases, and the user forgets the conversion rule. It is assumed that In addition, if the key layout of the QWERTY keyboard is virtually rearranged, it may be difficult to find the target key.

  Therefore, a main object of the present invention is to provide a novel portable terminal, a password input program, and a password input method.

  Another object of the present invention is to provide a portable terminal, a password input program, and a password input method that can prevent an input password from leaking to a third party.

  The present invention employs the following configuration in order to solve the above problems. The reference numerals in parentheses, supplementary explanations, and the like indicate the corresponding relationship with the embodiments described in order to help understanding of the present invention, and do not limit the present invention.

  1st invention is a portable terminal which memorize | stores an authentication password and performs an authentication process based on an authentication password and an input password, Comprising: The depth position of some character keys is made ahead of several character keys. Detecting a touch corresponding to a character key display area on the touch panel provided on the character key display unit, a character key display unit that displays the character key in 3D after the depth position of some other character keys A detecting unit that detects whether a touch on the display area of the character key is detected by the detecting unit, a storage unit that stores whether the depth position of the character key is the front or the rear, and a character stored in the storage unit A portable terminal comprising a determination unit that determines only a character associated with only one of the front and rear depth positions as a character string constituting the input password A.

  In the first invention, the portable terminal (10: reference numeral exemplifying corresponding part in the embodiment, hereinafter the same) stores an authentication password preset by a user or the like, and the authentication password and the user. The authentication processing is executed based on the input password input by. The character key display unit (30) is called an autostereoscopic display and displays a plurality of character keys. In addition, the character key display unit performs 3D display with the depth positions of some character keys in front and the depth positions of other character keys in the back. In this 3D display, the range in which the difference in depth in the character keys between one part and another part can be recognized is about 2 to 3 cm. That is, it is difficult for a user to recognize the difference. Therefore, the depth of the character key operated by the user is hardly recognized by a surrounding third party.

  The touch panel (38) is provided on the character key display section, and the detection section (36) detects a touch on the character key display area on the touch panel. For example, when the depth position of the “E” character key is displayed in the front (front position) and the touch on the display area of the character key is detected, the storage unit (24, S7) displays “E”. Is stored in association with information (1) indicating that the depth position is the previous character. The determination unit (24, S15, S17) determines, for example, only the character (ER !?) whose depth position is associated with the previous character string as the character string constituting the input password.

  According to the first invention, since the third party cannot recognize the depth position associated with the input character, it is difficult to specify the character string constituting the input password. Therefore, the password input by the user is difficult to leak to a third party.

  A second invention is dependent on the first invention, and further includes a changing unit that changes the depth position of each character key.

  In the second invention, for example, when a plurality of character keys are displayed in four rows, some character keys are in the first row, and some other character keys are in the second to fourth rows. Then, the changing unit (24, S3) changes the steps used as a part of the character keys from the first step to the second step when a predetermined time elapses after the character keys are displayed. At this time, since the first character key is a part of other character keys, the depth position is displayed later.

  According to the second invention, since some of the character keys displayed in the depth direction are changed, the input password is guessed from the position where the characters are input without changing the key arrangement of the plurality of character keys. Can be prevented. In this case, the operability of the user when inputting the password can be improved as compared with the method of displaying the character keys randomly.

  A third invention is dependent on the first invention or the second invention and further comprises a designation key for designating a front or rear depth position, and the determination unit detects a touch on the display area of the designation key by the detection unit. Then, of the characters stored in the storage unit, only the character associated with only one of the front and rear depth positions is determined as a character string constituting the input password.

  In the third invention, the designation key for designating the front or rear depth position is provided, for example, in the display range of the character key display section. In addition, when a key that designates the depth position as previous is operated, the determination unit determines the character associated with the previous depth position as a character string that constitutes the input password.

  According to the third invention, the user can arbitrarily determine the character string constituting the input password.

  A fourth invention is dependent on any one of the first to third inventions, and further includes an input result display unit that 3D-displays characters stored by the storage unit based on the associated depth position.

  In the fourth invention, the input result display unit (24, S9) displays, for example, a character whose depth position is associated with the front so that the depth position is the front.

  According to the fourth aspect, since the difference in the depth position of the displayed character can only be recognized by the user, it is not necessary to mask the input character. Therefore, the user can easily determine whether or not the character entered as the password is correct or edit it.

  According to a fifth aspect of the present invention, there is provided a character key display unit for displaying a character key in 3D with a depth position of a part of the character keys being forwarded and a depth position of the other part of the character keys being forwarded. 30) having a touch panel (38) provided on the character key display unit and a detection unit (36) for detecting a touch corresponding to the display region of the character key, storing the authentication password, and using the authentication password and the input password When the processor (24) of the portable terminal (10) that executes the authentication processing based on the detection unit detects a touch on the display area of the character key, the character key is associated with whether the depth position of the character key is the front or the rear. Of the storage unit (S7) for storing the password and only the characters associated with only one of the front and rear depth positions among the characters stored in the storage unit constitute the input password Determination unit for determining as a string (S15, S17) to function as a password input program.

  In the fifth aspect, as in the case of the first aspect, since the third party cannot recognize the depth position associated with the input character, it is difficult to specify the character string constituting the input password. Therefore, the password input by the user is difficult to leak to a third party.

  A sixth invention provides a character key display section (30) for performing 3D display with a depth position of a part of the character keys among a plurality of character keys and a depth position of the other part of the character keys after. It has a touch panel (38) provided on the character key display unit and a detection unit (36) for detecting a touch corresponding to the character key display area, stores the authentication password, and authenticates based on the authentication password and the input password A password input method for a mobile terminal (10) that executes processing, and stores a character in association with whether the depth position of the character key is front or rear when the detection unit detects a touch on the display region of the character key. (S7) And, among the stored characters, only the characters associated with only one of the front and rear depth positions are determined as a character string constituting the input password. S15, S17), a password input method.

  In the sixth aspect, similarly to the first aspect, since the third party cannot recognize the depth position associated with the input character, it is difficult to specify the character string constituting the input password. Therefore, the password input by the user is difficult to leak to a third party.

  According to this invention, since the third party cannot recognize the depth associated with the input character, the character string constituting the input password is not easily specified by the third party. Therefore, the input password can be made difficult to leak to a third party.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

FIG. 1 is an illustrative view showing an electrical configuration of a mobile phone according to an embodiment of the present invention. FIG. 2 is an illustrative view showing one example of soft keys displayed on the 3D display shown in FIG. FIG. 3 is an illustrative view showing one example of a configuration of a depth position table stored in the RAM shown in FIG. FIG. 4 is an illustrative view showing another example of soft keys displayed on the 3D display shown in FIG. FIG. 5 is an illustrative view showing one example of data stored in an input character buffer provided in the RAM shown in FIG. FIG. 6 is an illustrative view showing one example of data stored in an input password buffer provided in the RAM shown in FIG. FIG. 7 is an illustrative view showing one example of a memory map of the RAM shown in FIG. FIG. 8 is a flowchart showing an example of password input processing of the processor shown in FIG. FIG. 9 is a flowchart showing an example of 3D display processing of the processor shown in FIG.

  Referring to FIG. 1, a mobile phone 10 of this embodiment is a kind of mobile terminal, and includes a processor 24 called a computer or a CPU. The processor 24 is connected to the wireless communication circuit 14, the A / D converter 16, the D / A converter 20, the key input device 26, the display driver 28, the flash memory 32, the RAM 34, and the touch panel control circuit 36. An antenna 12 is connected to the wireless communication circuit 14, a microphone 18 is connected to the A / D converter 16, and a speaker 22 is connected to the D / A converter 20. The display driver 28 is connected to a 3D display 30 that functions as a character key display unit. A touch panel 38 is connected to the touch panel control circuit 36.

  The processor 24 manages the overall control of the mobile phone 10. The RAM 34 is used as a work area (including a drawing area) or a buffer area of the processor 24. Content data such as characters, images, sounds, sounds and videos of the mobile phone 10 is recorded in the flash memory 32.

  The A / D converter 16 converts an analog audio signal for audio or sound input through the microphone 18 connected to the A / D converter 16 into a digital audio signal. The D / A converter 20 converts (decodes) the digital audio signal into an analog audio signal, and supplies the analog audio signal to the speaker 22 via an amplifier (not shown). Therefore, sound or sound corresponding to the analog sound signal is output from the speaker 22. The processor 24 can adjust the volume of the sound output from the speaker 22 by controlling the amplification factor of the amplifier.

  The key input device 26 is called an operation unit and includes a cursor key, a call key, a call end key, and the like. Then, information (key data) on the keys operated by the user is input to the processor 24. Further, when each key included in the key input device 26 is operated, a click sound is generated. Therefore, the user can obtain an operational feeling for the key operation by listening to the click sound. Note that the mobile phone 10 has a key lock function that invalidates operations on keys.

  The display driver 28 controls display on the 3D display 30 connected to the display driver 28 under the instruction of the processor 24. The display driver 28 also includes a video memory (not shown) that temporarily stores image data to be displayed.

  The 3D display 30 is also called an autostereoscopic display, and can display an image three-dimensionally even if the user is not wearing special glasses. The 3D display 30 employs a parallax barrier method, also called a parallax barrier method. And in the magnitude | size of the 3D display 30 employ | adopted as the mobile telephone 10, the range which is seen in three dimensions becomes a width of about 2-3 cm. For this reason, if the user's viewpoint is out of the range, even if the image is displayed in 3D, it becomes difficult for the user to see the image stereoscopically.

  The touch panel 38 is a capacitance method that detects a change in capacitance between electrodes caused by an object such as a finger approaching the surface. For example, it detects that one or more fingers touch the touch panel 38. To do. The touch panel 38 is a pointing device that is provided on the 3D display 30 and indicates an arbitrary position within the screen. For example, when the touch panel 38 is operated by pressing, stroking, or touching the surface with a finger, the touch panel 38 detects the operation. Then, when the touch panel 38 touches the touch panel 38, the touch panel control circuit 36 that functions as a detection unit specifies the position of the finger and outputs coordinate data indicating the operated position to the processor 24. That is, the user can input an operation direction, a figure, or the like to the mobile phone 10 by pressing, stroking, or touching the surface of the touch panel 38 with a finger.

  Here, an operation in which the user touches the surface of the touch panel 38 with a finger is referred to as “touch”. On the other hand, the operation of releasing the finger from the touch panel 38 is referred to as “release”. The coordinates indicated by the touch are referred to as “touch points”, and the coordinates indicated by the releases are referred to as “release points”. The operations performed on the touch panel 38 such as touch and release are collectively referred to as “touch operations”.

  Note that the touch operation is not limited to a finger, and may be performed with a touch pen with a conductor attached to the tip. Further, as a detection method of the touch panel 38, a surface-type capacitance method may be employed, or a resistance film method, an ultrasonic method, an infrared method, an electromagnetic induction method, or the like may be used.

  The wireless communication circuit 14 is a circuit for performing wireless communication by the CDMA method. For example, when the user instructs a telephone call (calling) using the key input device 26, the wireless communication circuit 14 executes a telephone call process under the instruction of the processor 24, and sends a telephone call signal via the antenna 12. Is output. The telephone call signal is transmitted to the other party's telephone through a base station and a communication network (not shown). Then, when an incoming call process is performed at the other party's telephone, a communicable state is established, and the processor 24 executes a call process.

  The normal call processing will be described in detail. The modulated audio signal transmitted from the other party's telephone is received by the antenna 12. The received modulated audio signal is demodulated and decoded by the wireless communication circuit 14. The received voice signal obtained by these processes is converted into an analog voice signal by the D / A converter 20 and then output from the speaker 22. On the other hand, the transmission voice signal captured through the microphone 18 is converted into a digital voice signal by the A / D converter 16 and then given to the processor 24. The transmission signal converted into the digital audio signal is subjected to encoding processing and modulation processing by the wireless communication circuit 14 under the instruction of the processor 24, and is output via the antenna 12. Therefore, the modulated voice signal is transmitted to the other party's telephone through the base station and the communication network.

  When a telephone call signal from the other party's telephone is received by the antenna 12, the radio communication circuit 14 notifies the processor 24 of an incoming call (incoming call). In response to this, the processor 24 controls the display driver 28 to display caller information (such as a telephone number) described in the incoming call notification on the display 30. At substantially the same time, the processor 24 outputs a ring tone (sometimes called a ringing melody or a ringing voice) from a speaker (not shown).

  When the user performs a response operation using the call key, the wireless communication circuit 14 executes a telephone call incoming process under the instruction of the processor 24. Further, the communicable state is established, and the processor 24 executes the normal call process described above.

  Further, when a call end operation is performed with the call end key after shifting to the call ready state, the processor 24 controls the wireless communication circuit 14 to transmit a call end signal to the other party. Then, after transmitting the call end signal, the processor 24 ends the call process. The processor 24 also ends the call process when a call end signal is received from the other party first. Furthermore, the processor 24 also ends the call process when a call end signal is received from the mobile communication network regardless of the call partner.

  In addition, an authentication password is set in advance in the mobile phone 10, and the user can release the key lock state of the key input device 26, for example, by inputting a password that matches the authentication password.

  With reference to FIGS. 2A to 2D, in this embodiment, soft keys 68 including a plurality of character keys are displayed on the 3D display 30. First, the display on the 3D display 30 includes a status display area 60 including icons representing date and time, remaining battery level, reception status, and the like, and a function display area 62 on which a password input screen is displayed. The password input screen includes an input character display area 64 and a soft key display area 66 for displaying the input character and a cursor CU indicating the input position. A soft key 68 is displayed in the soft key display area 66.

  The soft keys 68 are arranged in a QWERTY layout. Further, the “/” key is arranged in the second row of the soft key 68, the shift (↑) key and the delete (DEL) key are arranged in the third row, and the switching key (123) key is arranged in the fourth row. , “!” Key, “?” Key, completion (End) key, front position (Front) key, and rear position (Rear) key. The shift key is a key for switching between uppercase and lowercase letters of an input character, the delete key is a key for deleting the input character, and the switch key is a QWERTY-format soft key 68, which is a number or symbol. Is a key for switching to the soft key 68 for inputting the key, and the completion key is a key operated when the input of the password is completed, and the front position key and the rear position key are determined with the input character string as the input password. It is a key to do. The front position key and the rear position key may be collectively referred to as a position key or a designation key.

  In this specification, symbols such as “/”, “*”, and “?” Are also referred to as “characters” for convenience.

  Also, the 3D display 30 performs 3D display with the depth positions of some of the character keys of the soft keys 68 set to the front (front position) and the depths of some other character keys set to the back (back position). For example, in FIG. 2A, the depth position of the first character key is the front, and the depth position of the second to fourth character keys is the rear. In the drawing, the 3D-displayed key is shown thicker than other character keys.

  Further, as shown in FIG. 2B, when a predetermined time elapses after the soft key 68 is displayed, the character key displayed at the previous position changes from the first level to the second level. Further, as shown in FIGS. 2 (C) and 2 (D), each time a predetermined time elapses, the character keys are displayed at the previous position from the second stage to the third stage, from the third stage to the fourth stage. Changes. Then, as shown in FIG. 2D, when a predetermined time elapses after the fourth-stage key is displayed at the previous position, the first-stage character key is again moved forward as shown in FIG. It will be displayed in position.

  The processor 24 manages the 3D display of the soft key 68 using the depth position table. Referring to FIG. 3A, in the depth position table, there are “character key” lines indicating the character keys included in soft key 68 and “depth position” lines indicating the depth positions of these character keys. Associated. For example, the first and second lines of the depth position table correspond to the first stage of the soft key 68, and the third and fourth lines correspond to the second stage of the soft key 68. In the row of “depth position”, if “0” is recorded, the depth position is later, and if “1” is recorded, the depth position is front.

  Since the depth position table shown in FIG. 3A corresponds to the display shown in FIG. 2A, “1” is recorded in the second row of the depth position table corresponding to the first row of the soft key 68. “0” is recorded in the fourth row of the depth position table corresponding to the second row of the soft key 68. Although not shown, “0” is displayed in the sixth and eighth lines of the depth position table corresponding to the third and fourth character keys of the soft key 68 as in the fourth line. Is recorded.

  Furthermore, when the depth position of the character key changes from the state shown in FIG. 2A to the state shown in FIG. 2B, the depth position table also changes from FIG. 3A to FIG. That is, the row of “depth position” where “1” is recorded changes to the fourth row corresponding to the character key in the second row.

  In addition, since the 3D display 30 has a narrow 3D display position, the user can recognize the difference between the front and rear positions of the soft key 68, but the surrounding third parties can recognize the difference between the front and rear positions. It is difficult to recognize.

  In this embodiment, when a character is input by touching the character key, the depth position of the key is associated with the input character and temporarily stored. When either the front position key or the rear position key for specifying the depth position is operated by the user, only the characters associated with the depth position specified by the operated position key constitute the input password. Confirmed as a string.

  Referring to FIG. 4, a character string “EKAR! P? PB” is displayed in input character display area 64. In addition, the characters “KR !?” are displayed at the previous position because the character key at the time of input is the previous position. On the other hand, the characters “KAPPB” are displayed at the rear position because the character key at the time of input is the rear position. As described above, the difference between the front and rear positions in the character string “EKAR! P? PB” can be recognized only by the user.

  The character string displayed in the input character display area 64 is temporarily stored in the buffer of the RAM 34. Referring to FIG. 5, for example, “1 (front position)” is associated with “ER !?” displayed at the front position as the depth position, and “KAPPB” displayed at the rear position is “ “0 (rear position)” is associated.

  In this state, when the user operates the front position key, only “ER !?” associated with “1” in the character input buffer is determined as a character string constituting the input password. Then, as shown in FIG. 6A, only (ER !?) displayed at the previous position is stored in the input password buffer. On the other hand, when the user operates the rear position key, only “KAPPB” associated with “0” in the character input buffer is determined as the character string constituting the input password. Then, as shown in FIG. 6B, the character (KAPPB) displayed at the rear position is stored in the input password buffer.

  Thus, since the difference in the depth position of the characters displayed in the input character area 64 can only be recognized by the user, it is not necessary to mask the input characters. Therefore, the user can easily determine whether or not the character entered as the password is correct or edit it.

  In addition, since the change of the key displayed at the previous position can only be recognized by the user, even if the position where the character is input is seen by a third party, it is difficult to analyze whether it is a character constituting the input password. be able to. Furthermore, since the above effect can be obtained without randomly displaying the key layout of the soft keys 68, it is possible to improve the operability of the user when inputting a password compared to the random display method. it can.

  The user can arbitrarily determine a character string constituting the input password by using the front position key or the rear position key.

  After the input password is confirmed, it is determined whether it matches the authentication password. If they match, the key lock state is released, and if they do not match, the key lock state is not released.

  Further, on / off of 3D display may be arbitrarily switched on the password input screen. In this case, when the 3D display is turned off, the input character string is masked with “*” or the like.

  FIG. 7 is a diagram showing a memory map of the RAM 34. The memory map of the RAM 34 includes a program storage area 302 and a data storage area 304. A part of the program and data is read from the flash memory 32 all at once or partly and sequentially as necessary, stored in the RAM 34, and then processed by the processor 24.

  The program storage area 302 stores a program for operating the mobile phone 10. For example, a program for operating the mobile phone 10 includes a password input program 310, a 3D display program 312, a normal input program 314, an authentication program 316, and the like.

  The password input program 310 is a program for the user to input a password. The 3D display program 312 is a program for changing the depth position of the soft key 68 as shown in FIGS. 2 (A) to 2 (D). The normal input program 314 is a program for receiving input of characters constituting the input password when the 3D display is turned off. The authentication program 316 is a program for determining whether the input password and the authentication password match.

  Although illustration is omitted, the program for operating the mobile phone 10 includes a program for notifying a voice incoming state and a program for communicating with the outside.

  Subsequently, in the data storage area 304, an input character buffer 330, an input password buffer 332, a depth position buffer 334, and the like are provided. The data storage area 304 stores touch coordinate map data 336 and authentication password data 338, and a change counter 340 is also provided.

  As shown in FIG. 5, the input character buffer 330 temporarily stores the character input by the user and the depth position of the key when the character is input in association with each other. The input password buffer 332 temporarily stores a character string determined as the input password. The depth position buffer 334 temporarily stores a depth position table shown in FIG.

  The touch coordinate map data 336 is data for associating the touch coordinates in the touch operation with the display coordinates of the 3D display 30. That is, the processor 24 associates the result of the touch operation performed on the touch panel 38 with the display on the 3D display 30 based on the touch coordinate map data 336. The authentication password data 338 is data composed of a character string predetermined by a user or the like.

  The change counter 340 is a counter for measuring a predetermined time (for example, 5 seconds), and is counted according to the processing of the 3D display program 312. Note that the value of the change counter 340 is set to “0” in the initial state.

  Although not shown, the data storage area 304 stores image data displayed in a standby state, character string data, and the like, and is provided with counters and flags necessary for the operation of the mobile phone 10. It is done.

  The processor 24 includes a Linux (registered trademark) -based OS such as Android (registered trademark) and REX, and a plurality of processors including a password input process illustrated in FIG. 8 and a 3D display process illustrated in FIG. 9 under the control of the other OS. Process these tasks in parallel.

  FIG. 8 is a flowchart of password input processing. For example, when an operation for starting input of a password is performed, the processor 24 determines whether or not 3D display is performed in step S1. That is, it is determined whether or not the soft key 68 is set to display with a depth. If “YES” in the step S1, that is, if the soft key 68 is set to display with a depth, a 3D display process is executed in a step S3. Since the 3D display process will be described in detail with reference to the flowchart of FIG. 9, the description thereof is omitted here. Further, the processor 24 that executes the process of step S3 functions as a changing unit.

  Subsequently, in step S5, it is determined whether or not a key has been operated. That is, it is determined whether or not a touch is detected on the display area of any one of the character keys. If “NO” in the step S5, that is, if the key is not operated, the process returns to the step S3. On the other hand, if “YES” in the step S5, that is, if the key is operated, the character is stored in association with the depth position of the key operated in the step S7. For example, when the character key “E” is displayed at the previous position as shown in FIG. 2A and the character key “E” is touched, the depth position stored in the depth position buffer 334. Based on the table, the depth position (1) is read out. The character “E” and the read depth position are associated with each other and stored in the input character buffer 330. Note that the processor 24 that executes the process of step S7 functions as a storage unit.

  Subsequently, in step S9, the input character is displayed with a depth. That is, in the input character buffer 330, characters are displayed in the input character display area 64 based on the position stored in the “depth position” row. For example, if “1 (previous position)” is associated with the character “E”, “E” is displayed at the previous position in the input character display area 64. The processor 24 that executes the process of step S9 functions as an input result display unit.

  Subsequently, in step S11, it is determined whether or not the input is completed. That is, it is determined whether or not a touch is made on the display range of the completion key. If “NO” in the step S11, that is, if the password input is not completed, the process returns to the step S3. On the other hand, if “YES” in the step S11, for example, if the completion key is operated, it is determined whether or not the previous position is used in a step S13. That is, it is determined whether or not the front position key or the rear position key is operated. In step S13, “YES” is determined when the front position key is operated, and “NO” is determined when the rear position key is operated. If “YES” in the step S13, for example, when the previous position key is operated in order to determine the character string displayed at the previous position as the input password, the character string input at the previous position is used as the input password. The confirmation process is executed in step S15. For example, as shown in FIG. 5, when characters and depth positions are stored in the input character buffer 330, only “ER !?” associated with “1” as the depth position is stored in the input password buffer 332. The

  On the other hand, if “NO” in the step S13, for example, when the rear position key is operated in order to determine the character string displayed at the rear position as the input password, the character input at the rear position is used as the input password. The confirmation process is executed in step S17. For example, as shown in FIG. 5, when stored in the input character buffer 330, only “KAPPB” associated with “0” in the depth position is stored in the input password buffer 332.

  When the process of step S15 or step S17 ends, the input password process ends and the authentication process is executed. Further, the processor 24 that executes the process of step S15 or step S17 functions as a determination unit.

  If “NO” in the step S1, that is, if the soft key 68 is not set to be displayed in 3D, a normal input process is executed in a step S19.

  FIG. 9 is a flowchart of 3D display processing. When step S3 of the password input process shown in FIG. 8 is executed, the processor 24 increments the change counter 340 in step S31. That is, the value of the change counter 340 is incremented to measure the predetermined time.

  Subsequently, in step S33, it is determined whether or not the value of the change counter 340 is greater than or equal to a threshold value. That is, it is determined whether the value of the change counter 340 is equal to or greater than a value corresponding to a predetermined time. For example, since the processes of steps S31 to S45 and steps S5 to S11 of the 3D display process are repeated about every 0.1 second, the threshold value is “50” if the predetermined time is 5 seconds. In this case, in step S33, it is determined whether or not the value of the change counter is 50 or more.

  If “NO” in the step S33, that is, if the predetermined time has not elapsed, the process proceeds to a step S43. If “YES” in the step S33, that is, if a predetermined time has elapsed after the soft key 68 is displayed, the change counter is initialized in a step S35. That is, in order to measure the predetermined time again, the value of the change counter 340 is initialized. Subsequently, in step S37, the variable n is incremented. The variable n is a variable indicating the number of stages displayed in 3D. Therefore, “1” is set to the variable n in the initial state. Then, as shown in FIG. 2A, when step S37 is executed in a state where the first step of the soft key 68 is displayed at the previous position, “2” is set to the variable n.

  Subsequently, in step S39, it is determined whether or not the variable n is 4 or more. That is, it is determined whether or not a predetermined time has passed in a state where the fourth step of the soft key 68 is displayed at the previous position. If “NO” in the step S39, that is, if the predetermined time has not elapsed while the fourth step of the soft key 68 is displayed at the previous position, the process proceeds to a step S43. On the other hand, if “YES” in the step S39, that is, if a predetermined time has elapsed with the fourth step of the soft key 68 displayed at the previous position, the variable n is initialized in a step S41. That is, 1 is set to the variable n in order to display the first step of the soft key 68 at the previous position.

  Subsequently, in step S43, it is determined whether or not the setting has been completed. That is, it is determined whether or not the previous position (1) is set in the nth row of the depth position in the depth position table. If “YES” in the step S43, that is, if the setting is completed, the 3D display process is ended and the process returns to the password input process.

  On the other hand, if “NO” in the step S43, that is, if the front position is not set in the n-th stage of the soft key 68, the depth position of the n-th stage in the soft key 68 is set to the front position in the step S45. Set. For example, if the variable n is “2”, the processor 24 sets “1” indicating the previous position to the row of “depth position” corresponding to the second row of the soft key 68 in the depth position table. To do. When the process in step S45 is completed, the 3D display process is terminated and the process returns to the password input process.

  As can be seen from the above description, the mobile phone 10 performs an authentication process based on a preset authentication password and an input password in order to release the key lock or the like. In addition, the mobile phone 10 includes a 3D display 30 that displays soft keys 68 having different depths, a touch panel 38 provided on the 3D display 30, and a touch control circuit 36 that detects a touch on the soft keys 68. Moreover, since the range which can recognize the difference in the depth in the soft key 68 displayed on the 3D display 30 is about 2-3 cm, it is difficult for the user to recognize the difference. Therefore, the depth of the character key operated by the user is hardly recognized by a surrounding third party. Further, when the character key “E” is displayed at the previous position and the character key is operated, a numerical value “1” indicating that the character “E” is the previous position is associated and stored. Is done. When the user operates the previous position key, only the character such as “E” associated with the previous position is determined as a character string constituting the input password.

  Thus, since the third party cannot recognize the depth position associated with the input character, it is difficult to specify the character string that constitutes the input password. Therefore, the password input by the user is difficult to leak to a third party.

  In another embodiment, the number of steps of the soft key 68 may be five or more. In another embodiment, the depth position may be changed for each “row” instead of the “stage” of the soft key 68. In another embodiment, the depth position may be alternately changed between the odd-numbered steps and the even-numbered steps of the soft key 68.

  In other embodiments, the completion key may not be displayed. In this case, each position key also serves as a completion key. For example, if the user operates the previous position key after inputting a character string, the processor 24 determines that the input of the password has been completed, and uses the character associated with the previous position as the character string constituting the input password. Determine.

  In other embodiments, the key array of the soft keys 68 may be an AZERTY array, an alphabetical array, or the like. Further, the authentication password may include numbers, or may include a mixture of uppercase and lowercase letters. Furthermore, characters such as Russian and Korean may be used as a character string constituting the authentication password.

  Further, in this embodiment, the password input for releasing the key lock has been described. However, in other lock functions using a password, characters may be input and the input password may be confirmed as in this embodiment. .

  In this embodiment, the depth position is recorded in the depth table which is a two-dimensional array. However, in another embodiment, the depth position may be recorded using a three-dimensional array. In this case, the depth position can be recorded in association with each dot of the image data.

  The communication system of the mobile phone 10 is a CDMA system, but an LTE (Long Term Evolution) system, a W-CDMA system, a GSM system, a TDMA system, an FDMA system, a PHS system, and the like may be employed.

  Further, the plurality of programs used in this embodiment may be stored in the HDD of the data distribution server and distributed to the mobile phone 10 via the network. Further, the storage medium may be sold or distributed in a state where a plurality of programs are stored in a storage medium such as an optical disk such as a CD, DVD, or BD (Blu-ray Disc), a USB memory, or a memory card. When a plurality of programs downloaded through the above-described server or storage medium are installed in a mobile phone having the same configuration as that of this embodiment, the same effect as that of this embodiment can be obtained.

  Furthermore, the present embodiment is not limited to the mobile phone 10 but may be applied to smartphones and PDAs (Personal Digital Assistants).

  The specific numerical values such as the predetermined time, the number of stages, the number of rows, the processing time, and the threshold given in this specification are merely examples, and can be changed as appropriate according to the product specifications and the like. is there.

DESCRIPTION OF SYMBOLS 10 ... Mobile phone 12 ... Antenna 14 ... Wireless communication circuit 24 ... Processor 26 ... Key input device 34 ... RAM
36 ... Touch panel control circuit 38 ... Touch panel

Claims (6)

A portable terminal that stores an authentication password and executes an authentication process based on the authentication password and the input password,
A character key display unit that displays the character keys in 3D with the depth positions of some of the character keys out of the plurality of character keys and after the depth positions of some of the character keys;
A touch panel provided on the character key display,
A detection unit for detecting a touch corresponding to a display area of the character key on the touch panel;
When the detection unit detects a touch on the display area of the character key, the storage unit stores the character in association with whether the depth position of the character key is the front or the back, and among the characters stored in the storage unit, A portable terminal comprising a determination unit that determines only a character associated with only one of the front and rear depth positions as a character string constituting an input password.   The mobile terminal according to claim 1, further comprising a changing unit that changes a depth position of each character key. A designation key for designating the front or rear depth position;
When the detection unit detects a touch on the display area of the designation key by the detection unit, only the characters associated with only one of the front and rear depth positions among the characters stored in the storage unit, The mobile terminal according to claim 1, wherein the mobile terminal is confirmed as a character string constituting the input password.   The portable terminal according to any one of claims 1 to 3, further comprising an input result display unit that 3D-displays characters stored by the storage unit based on an associated depth position. A character key display unit for displaying the character keys in 3D with the depth positions of some of the character keys out of the plurality of character keys and the depth positions of some of the other character keys; A portable terminal processor having a detection unit that detects a touch corresponding to a display area of a touch panel and a character key provided on the computer, stores an authentication password, and executes an authentication process based on the authentication password and the input password The
When the detection unit detects a touch on the display area of the character key, the storage unit stores the character in association with whether the depth position of the character key is the front or the back, and among the characters stored in the storage unit, A password input program that causes only a character associated with only one of the front and rear depth positions to function as a determination unit that determines a character string constituting the input password. Among the plurality of character keys, a character key display unit for displaying in 3D with a depth position of a part of the character keys in front and a depth position of another part of the character keys is provided on the character key display unit. A password input method for a portable terminal that has a detection unit that detects a touch corresponding to a display area of a touch panel and a character key, stores an authentication password, and executes an authentication process based on the authentication password and the input password. And
When the detection unit detects a touch on the display area of the character key, the character key is stored in association with whether the depth position of the character key is the front or the back, and only one of the stored characters before and after A password input method in which only the character associated with the depth position is determined as a character string constituting the input password.

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