JP4615552B2 - Display card - Google Patents

Description

  The present invention relates to a display card as an IC card that includes a display unit that displays specific information and is used for, for example, an identification card.

Conventionally, as a display card used for an identification card or the like, for example, one disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2003-296678) is known.
As shown in FIG. 7, the display unit 100 that can be electrically displayed on at least one of the front surface and the back surface, the display unit 101 that displays visible image data on the display unit 100, and the image data are recorded. The non-volatile information recording unit 103 provided with the image recording unit 102, the authentication unit 104 for confirming whether or not the user is a valid user for the card, and the authentication unit 104 performing an unauthorized operation on the card The display changing means 105 for changing the contents of the image data when judged, the pattern generating means 106 for generating a pattern used for changing the contents of the image data, and the releasing means 107 for returning the image data to a visible state by a release instruction. And comprising. The display change means 105 is an image non-display means for hiding the image data displayed on the display unit 100, or a pattern generated by the pattern generation means 106 and the image data are combined and displayed on the display unit 100. Any of image synthesizing means.

  This display card Ka is an identification card with a facial photo that has a credit function and is always visible. For example, when the person is verified by visually checking the card and enters the building, information such as a face photograph displayed on the display unit 100 is visually confirmed to verify the identity. Further, when the user uses the credit function, the display card Ka is inserted into the terminal and the password is entered. The entered personal identification number is verified by the authentication means 104 to determine whether or not the user is a valid user. At this time, if it is determined that the user is not a valid user, the credit function is locked and the image data is not displayed by the display changing unit 105 or the combination of the pattern and the image data is combined. The image is displayed on the display unit 100 and becomes unusable. When the display card Ka that has become unavailable can be used again, a release command is issued from the terminal or the host system, and the image data is displayed on the display unit 100 by the release means 107. The release unit 107 receives the release command, reads the image data from the image recording unit 102 of the information recording unit 103, and displays the image data on the display unit 100 by the display unit 101.

  The display card Ka changes the image data of the display unit 100 to non-display or a composite image when an illegal operation is performed on the card. For example, the display card Ka can be identified by visually checking the card. It is possible to determine whether or not the confirmed person is a legitimate user by visual inspection.

JP 2003-296678 A

  However, in this conventional display card Ka, image data that is always visible is displayed on the display unit 100, and the display unit 100 is not changed unless an illegal operation is performed on the card. Because the data is displayed, for example, if you verify the identity by letting a person visually check the card and enter the building, the reason is that even a person who is not a legitimate user has a similar face There is a problem that there is a case that the entrance to the building can be entered, and the security when using it as an identification card is not sufficient. Further, since the image data is always displayed, there is a problem that when the card is lost, the information of the image data can be easily read by another person.

  The present invention has been made in view of such problems, and displays information only when necessary so that a person who is not a legitimate user cannot illegally use the display card and can protect the information. The purpose is to provide.

  In order to achieve such an object, the display card of the present invention includes an input means for inputting a password and specific information for storing the specific information in a display card having a display unit for displaying specific specific information. A storage means, a password storage means for storing the password, a password verification means for determining suitability and improperness by comparing with a password stored in the password storage means when a password is input from the input means, and a password Specific information display means for displaying the specific information stored in the specific information storage means on the display unit when the collating means determines appropriate, and a predetermined time when the specific information display means is displayed. And a specific information non-display for hiding the specific information displayed on the display unit when the time measuring means measures a predetermined time. Constitute and means.

  Thereby, when using the display card, since the specific information is not displayed on the display unit in normal times, the specific information is displayed by inputting the password. When the password is entered by the input means, the password collating means collates the password stored in advance in the password storage means to determine whether the password is appropriate or inappropriate. When the password verification unit determines that the input password is appropriate, the specific information stored in advance in the specific information storage unit is displayed on the display unit by the specific information display unit. For example, in the case where the identity is proved by allowing a person to visually check the card and entering the building, the specific information is displayed on the display unit. This display card normally does not display the specific information on the display section, and the specific information is not displayed unless the password is entered. Therefore, another person obtains the card in the normal state. If you verify your identity by entering the building with visual confirmation, you can immediately determine whether the person who confirmed the card is a legitimate user, thus preventing unauthorized use of the card. it can. In addition, this display card causes the specific information non-display means to hide the specific information when a predetermined time predetermined by the time measuring means is counted. As a result, the specific information can be displayed only when necessary, so even if the card is lost in the normal state, the specific information is not displayed on the display unit, so that the specific information can be read by others. Information can be protected.

  And if necessary, it comprises forcible non-display means for forcibly hiding the specific information displayed by the specific information display means based on a predetermined input from the input means. As a result, the specific information can be hidden at any time without waiting for the predetermined time, so when it is not necessary to display the specific information, the display unit can be immediately hidden. The risk of reading specific information by others is reduced, and the information can be protected.

  Further, if necessary, the specific information non-display means has a function of rewriting the specific information with irrelevant information unrelated to the specific information, and the specific information display means has a function of rewriting the irrelevant information with the specific information. It is prepared and configured. The specific information non-display means overwrites the irrelevant information on the specific information displayed on the display unit, and displays the irrelevant information on the display unit. The specific information display means overwrites the irrelevant information displayed on the display unit with the specific information and causes the display unit to display the specific information. By rewriting the specific information and the irrelevant information by overwriting each other, the specific information can be displayed and hidden. The display unit is effective for electronic paper.

Further, if necessary, a main power source and a sub power source provided in advance are provided, and after the display by the specific information display means, whether the main power source can be supplied during the predetermined time or not is determined. Main power detection means for detecting, and power supply switching means for enabling the sub power supply when the main power supply detection means detects an inability.
For example, the main power source includes a detachable type such as a button type, and a fixed type such as a solar cell. In the present invention, any of these main power sources can be used.
That is, for example, in the case of a detachable main power supply, when the main power supply is removed while the specific information is displayed, the main power supply detection means detects the inability to supply power by the main power supply, and the power supply switching means Switch to sub power supply. If the display unit is made up of electronic paper that can display information semi-permanently without power, a person who is not a valid user with the specific information displayed can get the card and turn on the main power supply. When the card is removed, the microcomputer built in the card does not operate, so that the specific information non-displaying means is not performed and the specific information remains displayed on the display unit. In this state, there is a possibility that the card is illegally used, but when the microcomputer operates normally by switching to the sub power source and measures a predetermined time by the timing means, the specific information non-display means Since the specific information is hidden, unauthorized use of the card can be prevented.
Further, for example, in the case of a fixed solar cell, when the sunlight is shut off in a state where the specific information is displayed and the power supply from the main power supply is not performed, the main power supply detection means causes the main power supply to supply power. The inability is detected, and the power source switching means switches to the sub power source. Therefore, as described above, it is extremely effective when the electronic paper or the like is capable of displaying information semi-permanently without power.

Furthermore, if necessary, a main power supply is provided, and after the display by the specific information display means, a main power supply detection means for detecting whether the main power supply can be supplied or not, and the main power supply detection means And display erasure means for erasing the specific information displayed by the specific information display means when the impossibility is detected.
For example, the main power source includes a detachable type such as a button type, and a fixed type such as a solar cell. In the present invention, any of these main power sources can be used.
That is, for example, in the case of a detachable main power supply, when the main power supply is removed while the specific information is displayed, the main power supply detection means detects the inability to supply power by the main power supply, and the display erasure means The specific information is erased from the display unit. If a person who is not a legitimate user obtains the card while the specific information is displayed, and the main power is on, when the predetermined time predetermined by the time measuring means is counted, the specific information non-display means When the specific information is hidden and the main power supply is removed, the specific information is immediately erased from the display unit by the display erasure means, so that unauthorized use of the card can be prevented.
Further, for example, in the case of a fixed solar cell, when the sunlight is shut off in a state where the specific information is displayed and the power supply from the main power supply is not performed, the main power supply detection means causes the main power supply to supply power. Inability is detected, and the specific information is erased from the display unit by the display erasure means.

  In addition, if necessary, when the password verification means determines that the input is incorrect, the incorrect input counting means that counts the number of the incorrect inputs on the assumption that there is an incorrect input, and the inappropriate input count means And a lock means for stopping the function of the specific information display means when a predetermined improper number of inputs is reached. When the password is entered by the input means, the password collating means collates the password stored in advance in the password storage means to determine whether the password is appropriate or inappropriate. If the password verification unit determines that the input password is inappropriate, the password is input again. At this time, the improper input count means counts the number of improper inputs, and when the predetermined improper input count is reached, the function of the specific information display means is stopped by the lock means. When the function of the specific information display means is stopped, the specific information is not displayed even if an appropriate password is input thereafter. If someone who is not a legitimate user tries to illegally use the card, entering the password randomly and repeating this many times may reveal the proper password. It is very difficult for a person who does not know the password to display the specific information because the password can be entered only for the specified inappropriate number of times, so it is possible to prevent unauthorized use of the card and the specific information. Can be protected.

In the display card of the present invention, the input means is constituted by a push button key, and the function of the specific information display means is permitted before the specific information display means functions when the password verification means determines proper. For this purpose, there is provided a push-button frequency uniforming means for making the push-button frequency of the push-button key uniform in response to another password input. If the password is entered many times, the key used in the password becomes more discolored and deteriorated than other keys, and the finger marks become conspicuous. For this reason, the password may be clarified by a person who is not a legitimate user, but by entering another password after the password is determined to be appropriate by the password verification means, a key other than the key used in the password Therefore, it is possible to prevent the password from being elucidated by the finger marks because the frequency of pressing the keys becomes uniform and the dirt becomes inconspicuous.

  Furthermore, the display unit is made of electronic paper as necessary. Electronic paper can electrically rewrite the display content and can maintain the display content semi-permanently even after the power is turned off. A small amount of power is consumed when rewriting display contents, but since a backlight is not used, the power consumption is lower than that of a display such as a liquid crystal panel, and the necessity of charging and replacing the power source is reduced. When electronic paper is used, for example, a power source with a small power source such as a button battery can be used, but a light and thin power source can be used. Therefore, the card itself can be manufactured with a light weight and a small thickness. It can be used as a portable item such as an ID card.

  According to the display card of the present invention, the specific information is not normally displayed on the display unit, and the specific information is not displayed unless the password is input, so that another person obtains the card in the normal state, for example, If you verify the identity by letting a person visually check the card and enter the building, you can immediately determine whether the person who confirmed the card is a legitimate user. Can be prevented. In addition, since the specific information can be displayed only when necessary, even if the card is lost in a normal state, the specific information is not displayed on the display unit, so that the specific information is not read by others. , Can protect information.

Hereinafter, display cards according to embodiments of the present invention will be described with reference to the accompanying drawings.
The basic configuration of the display card K according to the embodiment of the present invention shown in FIGS. 1 to 5 includes a display unit 1, an input unit 10, a control unit 20, a main power supply 40, and a sub power supply 50. It becomes.

  As shown in FIG. 1, the main power supply 40 is detachably provided on the outside of the card, and is composed of a button battery. The main power supply 40 supplies power to the control unit 20.

  As shown in FIG. 1, the sub power supply 50 is attached to the card and is composed of a capacitor. Although not normally operated, when the power supply switching means 33 is operated, power is supplied to the control unit 20 instead of the main power supply 40.

  As shown in FIGS. 1 and 2, the display unit 1 is made of electronic paper and is provided on the surface of the card. The display unit 1 displays specific specific information 60 or irrelevant information 70 unrelated to the specific information 60. The specific information 60 is data whose information content can be rewritten, and information can be added, deleted or changed by an external device. The irrelevant information 70 is, for example, a plain image such as white or black, an image such as a photograph or a picture, or a composite image thereof. In the embodiment, the information content cannot be rewritten. Fixed data.

  As shown in FIGS. 1 and 2, the input means 10 includes a push button key 11 and is provided on the surface of the card. The push button key 11 includes a 10 key 12, a direction key 13, and an erase key 14.

  As shown in FIG. 1, the control unit 20 includes a specific information storage unit 21, a password storage unit 22, a password verification unit 23, a specific information display unit 24, a timing unit 25, and a specific information non-display unit 26. The forced non-display means 27, the push button frequency uniform means 28, the improper input count means 29, the lock means 31, the main power supply detection means 32, and the power supply switching means 33 are provided. Each means is realized by functions of a microcomputer CPU, volatile memory, nonvolatile memory and the like built in the card.

  The specific information storage unit 21 stores the specific information 60 and is realized by a function of a nonvolatile memory. The specific information 60 is input from the writing device 80 which is an external device, and is written and stored in the nonvolatile memory via the interface 34. The specific information 60 includes at least a face photograph 61, a name 62, a company name 63, and an issue date 64. Also, QR code 65 or the like may be described. When the QR code 65 is read by a terminal, the QR code 65 is accessed to the information base center. The irrelevant information 70 is also stored in the nonvolatile memory.

  The password storage unit 22 stores a password and is realized by a function of a nonvolatile memory. The password is input from the writing device 80, which is an external device, and is written and stored in the nonvolatile memory via the interface 34. The password is created by combining a plurality of numbers.

  The password verification unit 23 verifies the password input by the input unit 10 and the password stored in the nonvolatile memory by the password storage unit 22, and determines whether the input password is appropriate or inappropriate.

  The specific information display unit 24 reads the specific information 60 stored in the non-volatile memory by the specific information storage unit 21 when the password input by the password verification unit 23 is determined to be appropriate, and uses the specific information 60 as the irrelevant information 70. And the specific information 60 is displayed on the display unit 1.

  The time measuring means 25 measures a predetermined time when the specific information display means 24 displays. The predetermined time to be measured is input from the writing device 80 which is an external device, and is written and stored in the nonvolatile memory via the interface 34. When the specific information 60 is displayed on the display unit 1 by the specific information display unit 24, the time starts to be measured, and when the predetermined time is measured, the specific information non-display unit 26 described later is operated.

  The specific information non-display means 26 is configured to hide the specific information 60 displayed on the display unit 1 when the time measuring means 25 measures a predetermined time, and the specific information 60 is not related to the specific information 60. It has a function to rewrite to. Specifically, the irrelevant information 70 stored in the nonvolatile memory is read and overwritten on the specific information 60, and the irrelevant information 70 is displayed on the display unit 1.

  When the delete key 14 of the input unit 10 is pressed, the forced non-display unit 27 operates the specific information non-display unit 26 to read out the irrelevant information 70 stored in the nonvolatile memory and overwrites the specific information 60. Then, the irrelevant information 70 is displayed on the display unit 1.

  When the password collating unit 23 determines that the password collating unit 23 is appropriate, the push button frequency uniforming unit 28 requests the input of another password for permitting the function of the specific information display unit 24 before the specific information display unit 24 functions. The frequency of pressing the key 11 is made uniform. Another password is written and stored in the non-volatile memory through the interface 34 input from the writing device 80 which is an external device. Another password preferably includes at least one number that is not used in the password. Another password may be a random number. When the password verification unit 23 determines that the input password is appropriate, a guidance for requesting another password is displayed on the display unit 1, and if another password input according to the guidance is determined to be appropriate, The information display means 24 is operated.

  The improper input counting unit 29 counts the number of improper inputs when there is an improper input when the password collating unit 23 determines that it is improper.

  The lock means 31 stops the function of the specific information display means 24 when the improper input count means 29 reaches a predetermined improper input count. The inappropriate number of inputs is input from the writing device 80 which is an external device, and is written and stored in the nonvolatile memory via the interface 34. When the password verification unit 23 determines that the input password is inappropriate, the improper input count unit 29 starts counting improper inputs, and when the input count reaches the improper input count, the lock unit 31 Is activated. The lock unit 31 locks the function of the specific information display unit 24 so that the specific information 60 cannot be overwritten on the irrelevant information 70.

  The main power supply detection means 32 detects whether or not the power supply of the main power supply 40 is possible, and it is detected that power supply by the main power supply 40 is disabled while the specific information 60 is displayed on the display unit 1. At this time, the power source switching means 33 is operated. In the embodiment, the main power supply 40 is detachably provided on the outside of the card and is constituted by a button battery. Therefore, the main power supply detection means 32 detects this when the main power supply 40 is removed. .

  The power supply switching means 33 enables the sub power supply 50 when the main power supply detection means 32 detects that the main power supply 40 is removed, that is, when power supply by the main power supply 40 is disabled. The power supply source 20 is switched from the main power supply 40 to the sub power supply 50.

  The display card K according to the present embodiment configured as described above operates as follows. Here, a case where the display card K is used as an identification card will be described. The display card K as an identification card is used when a guardian at the entrance of the building or the like visually confirms the card and confirms it to enter the building.

  First, the setting of the display card K will be described. As shown in FIG. 3, data is previously written in the display card K from the writing device 80 which is an external device. Specifically, the display card K and the writing device 80 are connected via the interface 34 (1-1), and the nonvolatile memory of the microcomputer built in the card is read (1-2). In the specific information storage means 21 composed of the nonvolatile memory, the face photograph 61, the name 62, the company name 63, the issue date 64, and the QR code 65 as the specific information 60 are inputted and stored (1-3-1). Similarly, a password composed of a plurality of numbers is input and stored in the password storage means 22 (1-3-2). Further, a predetermined time from the start of the time measurement used by the time measuring means 25 to the operation of the specific information non-display means 26 is set and stored in the nonvolatile memory (1-3-3). Furthermore, another password including at least one number that is not used for the password used in the push button frequency uniforming means 28 is input and stored in the nonvolatile memory (1-3-4). Furthermore, the number of improper inputs used by the improper input counting means 29 is set and stored in the nonvolatile memory (1-3-5). These information and settings can be rewritten by inputting from the writing device 80. Further, the irrelevant information 70 is inputted and stored in the nonvolatile memory (1-3-6). Since the irrelevant information 70 is stored as fixed data, the operation of storing it in the nonvolatile memory may be performed only at the initial stage. When each information and setting is stored in the non-volatile memory, the irrelevant information 70 is rewritten to the irrelevant information 70 and the irrelevant information 70 is displayed on the display unit 1 (1-4) to be usable (1-5).

  That is, during the normal time, as shown in FIG. 2A, the irrelevant information 70 is displayed on the display unit 1 of the display card K (2-1). In this state, when the user comes near the entrance of a building or the like, the password is input by the push button key 11, and the specific information 60 is displayed on the display unit 1 as shown in FIG. Specifically, as shown in FIG. 4, the password is input by operating the push button key 11 with the input means 10 (2-2). The input password is verified by the password verification unit 23 with the password stored in the password storage unit 22 to determine whether it is appropriate or inappropriate (2-3). When the password verification means 23 determines that the input password is appropriate (2-3 YES), the push button frequency uniform means 28 is activated. The push button frequency uniforming means 28 displays guidance for requesting another password on the display unit 1 and, when another password is input in accordance with the guidance (2-4), activates the specific information display means 24. The specific information display unit 24 reads the specific information 60 stored in the specific information storage unit 21, overwrites the irrelevant information 70, and causes the display unit 1 to display the specific information 60 (2-5).

  In this state, the guardian visually confirms the specific information 60, proves that he is an enterable person, and enters the building. In this case, since the QR code 65 is provided in the specific information 60, it is difficult to determine whether or not the user is a legitimate user by visual observation only because the face and the face photograph 61 are similar to each other. Can read the code with the terminal, access the information base center and verify the identity, and security is improved accordingly.

  When the specific information display unit 24 displays the specific information 60 on the display unit 1, the time measuring unit 25 operates (2-6). When the time is started by the time measuring means 25 and a predetermined time is measured in advance, the specific information non-display means 26 is activated. The specific information non-display means 26 reads the irrelevant information 70 that is fixed data, overwrites the specific information 60, and causes the display unit 1 to display the irrelevant information 70 (2-1).

Next, for example, a case will be described in which the display card K is lost by being dropped and used illegally. Normally, the specific information 60 is not displayed on the display unit 1 and the specific information 60 is not displayed unless a password is entered. Therefore, even if another person obtains the card in the normal state, the guardian presents the card. It is possible to immediately determine whether the person is a legitimate user or not, so that unauthorized use of the card can be prevented.
That is, since the irrelevant information 70 is displayed on the display unit 1 in the display card K of the present invention, even if the specific information 60 is lost in a non-display state, the card is illegally used, or the specific information 60 is received from the card. It is not read. Specifically, as shown in FIG. 5, when it is lost (3-1), the irrelevant information 70 is displayed on the display unit 1 (3-2NO), so in this state, it is at the entrance of a building or the like. Even if the card is presented to the guard, the identity cannot be proved and the person cannot enter the building (3-8). Further, since the irrelevant information 70 is information unrelated to the specific information 60, the specific information 60 is not read from the card. Therefore, when a non-authorized user tries to use the display card K, it is necessary to input the password to display the specific information 60. However, since the password 60 is composed of a plurality of numbers, it is difficult to solve the password with a single input.

  In addition, in order for a person who is not a legitimate user to illegally use the card, it is necessary to enter a proper password. However, it is very difficult for a person who does not know the password to enter the proper password. Even if an attempt is made to enter a password, as shown in FIG. 4, the entered password is collated with the password stored in the password storage means 22 by the password collating means 23 to determine whether the password is appropriate or inappropriate. (2-3). In this case, since the input password is usually incorrect, the input password is judged to be inappropriate by the password verification means 23 (2-3 NO), and the inappropriate input count means 29 is activated. (2-7). If the improper input count means 29 is within the improper input count preset in the nonvolatile memory (2-7 YES), the improper input count means 29 operates the input means 10 (2-2). Then, the password is input again, and the password verification unit 23 is activated. When this operation is repeated several times and the number of improper inputs is reached (2-7 NO), the lock means 31 is activated (2-8). Since the lock unit 31 locks the function of the specific information display unit 24, the irrelevant information 70 remains displayed on the display unit 1. Therefore, unauthorized use of the card can be prevented and the specific information 60 can be protected.

  When the display card K returns to an authorized user after the locking means 31 is activated and the display card K is used again, the display card K is connected to the writing device 80 and data is newly written from the writing device 80. The card can be used.

  Further, even if the display card K of the present invention is lost with the specific information 60 displayed on the display unit 1 (3-1, 3-2 YES), the card is illegally used or the specific information 60 is received from the card. There is little risk of being read. Specifically, as shown in FIG. 5, the specific information display means 24 displays the specific information 60 and activates the time measuring means 25, so that when the specific information 60 is lost while being displayed on the display unit 1, The time measuring means 25 is in a working state. When the time measuring means 25 measures a predetermined time set in advance in the nonvolatile memory (3-3 YES), it activates the specific information non-display means 26 (3-7). The specific information non-display means 26 reads the irrelevant information 70 that is fixed data, overwrites the specific information 60, and causes the display unit 1 to display the irrelevant information 70 (3-8). That is, even if the specific information 60 is lost in a state where the specific information 60 is displayed on the display unit 1, the specific information 60 is displayed for only a short time, thereby reducing the risk of unauthorized use of the card or reading information by others. .

  Furthermore, when the specific information 60 is displayed on the display unit 1 and lost, the main power supply 40 may be removed and the display may remain as it is. That is, when the main power supply 40 is removed, the function of the control unit 20 is stopped, the display unit 1 is composed of electronic paper, and the electronic paper is characterized by maintaining the display even when there is no power supply. Although the specific information 60 is still displayed on the unit 1, the display card K can hide the display unit 1 even if the main power supply 40 is removed.

  Specifically, as shown in FIG. 5, when the main power supply 40 is removed in a state where the specific information 60 is displayed on the display unit 1 (3-4 YES), the main power supply detection means 32 operates (3-5). ). The main power supply detection means 32 detects the inability to supply power from the main power supply 40 and activates the power supply switching means 33 (3-6). The power supply switching means 33 validates the sub power supply 50 attached to the card and activates the function of the control unit 20 by the sub power supply 50. Since the display unit 1 is in a state where the specific information 60 is displayed (3-2 YES), the time measuring means 25 is in operation (3-3). When the time measuring means 25 measures the predetermined time set in advance in the nonvolatile memory (3-3 YES), it activates the specific information non-display means 27 (3-7). The specific information non-display unit 27 reads the irrelevant information 70 that is fixed data, overwrites the specific information 60, and causes the display unit 1 to display the irrelevant information 70 (3-8). That is, even if the main power supply 40 is removed while the specific information 60 is displayed on the display unit 1, the function of the control unit 20 is not stopped and the display unit 1 can be hidden. Only a short time is displayed, and accordingly, the risk of unauthorized use of the card and reading of information by others is reduced.

  In the present embodiment, the forced non-display means 27 may be operated (2-9) in order to reliably prevent a loss accident in which the specific information 60 is being displayed. The forced non-display means 27 is activated by pressing the delete key 14 by the input means 10, and as soon as it is activated, the specific information non-display means 26 is activated to display the irrelevant information 70 on the display unit 1 (2- 1). In this case, since the specific information 60 can be hidden at any time without waiting for a predetermined time, the display unit 1 can be immediately hidden when it is not necessary to display the specific information 60. Therefore, the risk of reading the specific information 60 by another person is reduced, and the information can be protected.

  In addition, since the display unit 1 of the display card K uses electronic paper, power is consumed only when the specific information 60 and the irrelevant information 70 are rewritten. Therefore, an external power source is not required and the capacity of the power source is small. A lightweight and thin button battery can be used. Therefore, the card itself can be manufactured with a light weight and a thin thickness, which is convenient as a portable item such as an identification card.

  FIG. 6 shows an example of a display card K according to another embodiment of the present invention. This is a case where the control unit 20 includes the display erasing means 35.

  The display erasure unit 35 erases the specific information 60 displayed by the specific information display unit 24 when the main power supply detection unit 32 detects that the main power supply 40 cannot supply power. When the sub power source 50 is switched, the display erasing means 35 is activated. The display erasure unit 35 operates the specific information non-display unit 26.

In the display card K, when the main power supply 40 is removed in a state where the specific information 60 is displayed on the display unit 1 (4-1), the main power supply detection means 32 indicates that the main power supply 40 cannot supply power. Then, the power supply switching means 33 is activated and the sub power supply 50 is activated (4-3). When the sub power source 50 is switched, the display erasure unit 35 is activated (4-4), and the specific information non-display unit 26 is activated by the display erasure unit 35. The specific information non-display means 26 reads the irrelevant information 70 that is fixed data, overwrites the specific information 60, and causes the display unit 1 to display the irrelevant information 70 (4-5). That is, if the main power supply 40 is removed while the specific information 60 is displayed on the display unit 1, the display unit 1 is immediately hidden, so that unauthorized use of the card can be prevented and information can be sent to others. The risk of being read is reduced.
Other configurations, operations, and effects are the same as those in the above-described embodiment.

In the above-described embodiment, the specific information 60 has the above-described content, but the specific information 60 is not necessarily limited thereto, and any content that can prove the identity may be used, and may be changed as appropriate.
In the above embodiment, the QR code 65 is provided in the specific information 60. However, the QR code 65 is not necessarily limited thereto, and may be a bar code or the like as long as it can be read by a terminal, and may be changed as appropriate. .
Furthermore, in the above embodiment, the irrelevant information 70 is composed of fixed data. However, the irrelevant information 70 is not necessarily limited to this and may be rewritable data, and may be changed as appropriate. In addition, since multiple information can be stored on a single card, multiple people can share the card or use it properly depending on where it is used by using different passwords. It is.

Naoma was, in the above SL embodiment, is constituted of the push button keys 11 in 10 key, not necessarily limited thereto, may be a letter or the like, no problem appropriately changed.
Furthermore, in the above embodiment, the main power source 40 is configured with a detachable button battery, but is not necessarily limited to this, and may be a fixed solar cell or the like, and may be appropriately changed. In the case of this solar cell, when sunlight is shut off in a state where specific information is displayed and power supply from the main power supply is not performed, the main power supply detection means detects the inability to supply power from the main power supply, The sub power source is switched by the power source switching means. Therefore, similarly to the above, it is extremely effective in the case of electronic paper that can display information semipermanently even without power.

  Further, the display card K may be provided with a volatile memory. With this volatile memory, for example, mathematical calculations can be performed with a push button key, and it can be used as an electronic calculator. Furthermore, when it comprises using a magnetic card, it can be used as a time card. Furthermore, in the above-described embodiment, the present display card is used as an identification card. However, the present invention is not necessarily limited to this and can be used for various purposes. For example, since it can be used repeatedly, it can be applied to a free pass ticket for an amusement park, and is more reusable than a conventional IC card.

It is a block diagram which shows the function means of the display card which concerns on embodiment of this invention. The display card which concerns on embodiment of this invention is shown, (A) is a figure which shows the state in which irrelevant information is displayed, (B) is a figure which shows the state in which specific information is displayed. It is a flowchart when writing data from the writing device into the display card according to the embodiment of the present invention to make it usable. It is a flowchart in the case of using the display card which concerns on embodiment of this invention. It is a flowchart which shows the function when the display card based on embodiment of this invention is lost. It is a flowchart which shows a function when the main power supply of the display card which concerns on another embodiment of this invention is removed. It is a figure which shows an example of the conventional display card.

Explanation of symbols

K display card 1 display unit 10 input unit 11 push button key 12 10 key 13 direction key 14 erasing key 20 control unit 21 specific information storage unit 22 password storage unit 23 password verification unit 24 specific information display unit 25 timing unit 26 specific information non-display Means 27 Forced non-display means 28 Push button frequency uniform means 29 Improper input count means 31 Lock means 32 Main power supply detection means 33 Power supply switching means 34 Interface 35 Display erasure means 40 Main power supply 50 Sub power supply 60 Specific information 61 Facial photograph 62 Name 63 Company name 64 Issue date 65 QR code 70 Unrelated information 80 Writing device

Claims (7)

In a display card with a display for displaying specific specific information,
An input means for inputting a password, a specific information storage means for storing the specific information, a password storage means for storing the password, and a password input from the input means stored in the password storage means A password verification unit that determines suitability and inappropriateness by comparing with a password, a specific information display unit that displays on the display unit the specific information stored in the specific information storage unit when the password verification unit determines that the password is appropriate, and Time measuring means for measuring a predetermined time when there is a display by the specific information display means, and specific information non-display means for hiding the specific information displayed on the display unit when the time measuring means times the predetermined time door and Bei Ete up the,
When the input means is constituted by a push button key and the password verification means is judged to be appropriate, it is requested to input another password for permitting the function of the specific information display means before the specific information display means functions. A display card comprising a push-button frequency uniforming means for making the push-button frequency of the push-button key uniform .   2. The display card according to claim 1, further comprising forced non-display means for forcibly hiding the specific information displayed by the specific information display means based on a predetermined input from the input means.   The specific information non-display means has a function of rewriting specific information to irrelevant information unrelated to the specific information, and the specific information display means has a function of rewriting the irrelevant information to the specific information. The display card according to claim 1 or 2.   A main power supply detecting means comprising a main power supply and a sub power supply provided in advance, and detecting whether the main power supply can be supplied or not during the predetermined time after display by the specific information display means 4. The display card according to claim 1, further comprising: a power supply switching unit that enables the sub power source when the main power source detection unit detects an inability.   A main power source having a main power source and detecting whether the main power source can be supplied after the display by the specific information display unit; and the specific information when the main power source detecting unit detects the inability 4. A display card according to claim 1, further comprising display erasure means for erasing the specific information displayed by the display means.   When the password verification means determines that the input is inappropriate, the incorrect input count means counts the number of the incorrect inputs as if there was an incorrect input, and the number of inappropriate inputs determined in advance by the inappropriate input count means. The display card according to claim 1, further comprising: a lock unit that stops the function of the specific information display unit when the error occurs.   The display card according to claim 1, wherein the display unit is made of electronic paper.

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