JP4130642B2 - Information display device - Google Patents

Description

  The present invention relates to an information display device that can display information to be displayed when a predetermined condition is satisfied and is excellent in portability.

  Conventionally, a certificate printed on a paper medium is given to a holder of a qualification having an expiration date or a qualification having a right. A holder of qualifications can indicate that he / she is a qualification holder by posting his / her certificate at a place where he / she is allowed to perform work, business or recruitment.

The following non-patent document 1 is known as a document describing similar techniques.
“TOPPAN Home Page”, [online], [searched February 19, 2004], Internet <URL: http: //www.toppan.co.jp/aboutus/release/article253.html>

  In reality, however, the holder of qualifications may inadvertently post a certificate that has expired. If the expiration date is not printed on the certificate, the third party often does not notice that the expiration date has passed.

  In addition, since the certificate is printed on paper media, it cannot be rewritten. Therefore, if the expiration date has passed, the issuer will either collect the certificate or voluntarily discard the certificate holder. There must be.

  Under such circumstances, an electrically rewritable device that replaces a certificate is desired. However, since such a device places importance on portability, for example, power must be continuously supplied during display. LCD panels are avoided.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to display information to be displayed when a predetermined condition is satisfied and to display information with excellent portability. To provide an apparatus and an information display system.

In order to solve the above problems, the present invention of claim 1 is characterized in that information to be displayed is displayed by the power of the battery and the display means holds the display contents even when the power of the battery is insufficient. The threshold voltage, the proof content information indicating the content of the proof, the expiration date information indicating the expiration date of the proof content, and the proof content invalid Storage means for storing display information when invalid and displayed when the battery voltage is insufficient, storage means for storing information when the battery voltage is insufficient, and displaying the proof content information on the display means And in the state where the certification content information is displayed on the display means, it is determined whether or not the expiration date of the expiration date information has passed by the power of the battery, and it is determined that the expiration date has passed. display And expiration determination display changing means for changing the contents to the invalid when the display information from the certified contents information, in a state in which the certified contents information is displayed on the display unit, the voltage of the battery is above said threshold voltage Battery voltage determination display changing means for changing the display content from the proof content information to the display information at the time of insufficient voltage when it is determined that the display voltage is lower than the threshold voltage. A portable information display device characterized by the above is used as a solution means.

According to the first aspect of the present invention, the certificate content information, the invalid time display information, and the voltage shortage display information are collectively received and stored, and in the state where the certificate content information is displayed on the display means, When it is determined that the expiration date has passed, the expiration date display change means that changes the display content from the certification content information to the invalid time display information is provided, so that information that has expired after the expiration date is recognized as valid. In addition to this, it is determined that the voltage of the battery that supplies power to the expiration date determination display control means is lower than the threshold voltage in a state where the certification content information is displayed on the display means. The battery voltage determination display changing means for changing the display content from the proof content information to the display information at the time of insufficient voltage is provided. The resulting not become inconvenience can be eliminated.

The present invention according to claim 2 is a solving means comprising a computer program for operating a computer as each means constituting the information display apparatus according to claim 1.

According to the second aspect of the present invention, it is possible to improve the distribution by the computer program that operates the computer as each means constituting the information display device according to the first aspect.

According to a third aspect of the present invention, there is provided a recording medium storing the computer program according to the second aspect .

According to the third aspect of the present invention, the distribution can be enhanced by the recording medium storing the computer program according to the second aspect .

According to the present invention, the certification content information, the invalid time display information, and the voltage shortage display information are collectively received and stored, and it is determined that the expiration date has passed in a state where the certification content information is displayed on the display means. In this case, there is an expiry date judgment display change means to change the display content from the certification content information to the invalid display information, thereby eliminating the inconvenience that invalidated information is recognized as valid In addition, in the state where the proof content information is displayed on the display means, it is displayed when it is determined that the voltage of the battery supplying power to the expiration date determination display control means is lower than the threshold voltage. By providing the battery voltage determination display changing means for changing the contents from the proof content information to the display information when the voltage is insufficient, the effect cannot be obtained even though the expiration date determination display changing means is provided. The made inconvenience can be eliminated.

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

  FIG. 1 is a configuration diagram of an information display apparatus according to an embodiment of the present invention.

  The information display device 1 is a device that displays the contents of a certificate, which is information having an expiration date, and has a configuration of electronic paper that can hold the display contents even when power supply is lost.

  That is, the information display device 1 displays the battery 11, the display unit 12 that can display with the power of the battery 11 and retain the display contents even when the power is lost, and the display of the display unit 12 with the power of the battery 11. An IC chip type control unit 13 that performs control is provided.

  In the information display device 1, the antenna 14 connected to the control unit 13 is stretched around the display unit.

  The antenna 14 wirelessly receives current time information indicating the current time. Instead of receiving the current time information wirelessly by the antenna 14, the information display device 1 is provided with a clock 15, and the current time is determined from this clock. It is good also as a structure which acquires information.

  The control unit 13 is configured by a computer including an arithmetic device (not shown) and a storage device, and the arithmetic device sequentially executes the computer program of the storage device to process information stored in the storage device, thereby displaying the display unit. 12 is displayed.

  FIG. 2 is a configuration diagram of an information display system including the information display device 1.

  The information display device 1 is posted on a place where an act such as work permitted by the holder of qualifications, business, or recruitment is performed. In the vicinity of the information display device 1, a client computer 3 to which a wireless communication device 2 is connected is installed. The client computer 3 is connected to a network 4 such as the Internet, and an information distribution server 6 connected to a certification content database 5 for storing the content of certification, and a time distribution server 7 that distributes current time information. And are connected.

  FIG. 3 is a sequence diagram when the information display device 1 is delivered to the holder of the qualification. Here, the information display device 1 that does not store the contents of the proof is prepared on the information distribution server 6 side, and the threshold voltage for the voltage of the battery 11 is stored in the storage device of the information display device 1. Suppose that

  When the holder of the qualification, etc. applies for the delivery (issuance) of the information display device 1 that displays the certification contents of the qualification from the client computer 3 to the information distribution server 6 (S1), the information distribution server 6 is prepared. In the storage device of the information display device 1, proof content information indicating the content of the proof, a key / certificate (including DN (Distinguished Name) as identification information) unique to the content of the proof, Expiration date information indicating the expiration date of the content, invalidity display information displayed on the display unit 12 when the content of the certification becomes invalid, and display on the display unit 12 when the voltage of the battery 11 is insufficient. Display information when the voltage is insufficient is stored (S3).

  As a result, the threshold voltage and these pieces of information are stored in the storage device of the controller 13 as shown in FIG.

  The invalid-time display information is obtained by adding information such as “this content is invalid because it has expired” to the certification content information. In addition, the display information at the time of undervoltage is the information such as "This content is still displayed due to insufficient battery voltage, so please check whether it is valid or invalid by yourself." Is added.

  The information distribution server 6 stores these pieces of information in the information display device 1 and stores the DN of the key / certificate, the certification content information, the expiration date information, and the invalid time display information in the certification content database 5. And the voltage shortage display information are stored (S5).

  As a result, the proof content database 5 stores these pieces of information as shown in FIG.

  And the information display apparatus 1 which memorize | stored the content of proof in this way is delivered to holders, such as qualification.

  Next, a proof verification process for verifying the validity of the proof will be described.

  When verifying the validity of the proof made by the information display device 1, the holder of the qualification performs a general challenge and response as is done with an IC card. In the IC card, owner authentication is performed by inputting a PIN code or the like in order to enable use of a key / certificate. However, the information display device 1 may or may not perform owner authentication using a PIN code or the like. either will do. For example, when only the validity of the information display device 1 is verified, it is not necessary to perform owner authentication using a PIN code or the like, but the validity of the information display device 1 is verified and the owner is authenticated. In some cases, it is necessary to perform owner authentication using a PIN code or the like.

  Next, processing performed by the delivered information display device 1 will be described. Here, description will be made on the assumption that the arithmetic unit of the control unit 13 reads the proof content information from the storage device and displays it on the display unit 12.

  The arithmetic unit included in the control unit 13 of the information display device 1 executes an expiration date determination display change program stored in the storage device of the control unit 13 to execute an expiration date determination display change process (condition determination display change process). In parallel with this, the battery voltage determination display change program stored in the storage device is executed to perform the battery voltage determination display change process.

  First, the expiration date determination display change process will be described.

  FIG. 6 is a flowchart of the expiration date determination display change process.

  First, the arithmetic unit of the control unit 13 reads the expiration date information from the storage device (S11), and obtains the current time from the time distribution server 7 via the client computer 3, the wireless communication device 2 and the antenna 14, or from the clock 15. The current time information shown is acquired (S13).

  And the arithmetic unit of the control part 13 determines whether the expiration date shown by the said expiration date information has passed using the expiration date information and the current time information (S15).

  If it is determined that the expiration date has not passed, the system waits for a predetermined length of time (S17), and returns to step S11 when the time has elapsed.

  On the other hand, if it is determined that the expiration date has passed, the arithmetic unit of the control unit 13 reads the invalid-time display information from the storage device (S18), erases the proof content information that has been displayed so far, and is shown in FIG. Thus, the display information at the time of invalidity is displayed on the display unit 12 (S19).

  As a result, it is possible to eliminate the inconvenience that the contents of the certificate that has become invalid after the expiration date are recognized as valid.

  By the way, if the voltage of the battery 11 is insufficient before the expiration date expires, the control unit 13 that receives power from the battery 11 does not function, so the expiration date determination display change process cannot be performed. That is, the effect cannot be obtained even though the processing is performed. Therefore, the information display device 1 solves this by performing a battery voltage determination display change process.

  FIG. 7 is a flowchart of the battery voltage determination display change process.

  First, the arithmetic unit of the control unit 13 reads the threshold voltage from the storage device (S21) and detects the voltage of the battery 11 (S23).

  Next, the arithmetic unit of the control unit 13 determines whether or not the detected voltage is lower than the read threshold voltage (S25).

  If it is determined that the voltage of the battery 11 is lower than the threshold voltage, the battery 11 waits for a predetermined length of time (S27), and the control is returned to step S21 when the time has elapsed.

  On the other hand, when it is determined that the voltage of the battery 11 is lower than the threshold voltage, the arithmetic unit of the control unit 13 reads display information at the time of voltage drop from the storage device (S28), and the proof content that has been displayed so far The information is erased, and display information at the time of voltage drop is displayed on the display unit 12 as shown in FIG. 2 (S29).

  This eliminates the inconvenience that the effect cannot be obtained even though the expiration date determination display change process is performed.

  When the expiration date of the content of the proof displayed on the information display device 1 is updated, first, the client computer 3 is valid as shown in FIG. The information distribution server 6 is requested to update the expiration date (S31), and the information distribution server 6 updates the expiration date information (S33). The information distribution server 6 stores the updated expiration date information in the certification content database 5 (S35) and transmits it to the client computer 3 (S37). The client computer 3 transmits the transmitted expiration date information to the information display device 1 wirelessly via the wireless communication device 2 (S39). The information display device 1 receives the expiration date information transmitted wirelessly by the antenna 14 and stores it in the storage device of the control unit 13 (S41).

As described above, according to the information display device 1 according to the present embodiment, the proof content information, the invalid time display information, and the voltage shortage display information are collectively received and stored, and the proof content information is displayed on the display unit. In the state displayed on the screen, when it is determined that the expiration date has passed, the control unit 13 as an expiration date determination display changing means for changing the display content from the certification content information to the display information at the time of invalidity is provided. In addition, it is possible to eliminate the inconvenience that information that has become invalid after the expiration date is recognized as valid, and in addition to this, in the state where the proof content information is displayed on the display means, power is supplied to this expiration date determination display control means Control unit 1 as battery voltage determination display changing means for changing the display content from the proof content information to the display information when the voltage is insufficient when it is determined that the voltage of the supplied battery is lower than the threshold voltage. By having a, despite having an expiration date determining display change means it can solve the disadvantage that its effect can not be obtained.

  The expiration date determination display change program and the battery voltage determination display change program, which are computer programs that constitute the information display device 1 of the present embodiment, are read by a computer such as a memory, a magnetic disk, an optical disk, a magneto-optical disk, and a magnetic tape. It can be stored in a possible recording medium or transmitted via a communication network such as the Internet and widely distributed.

It is a block diagram of the information display apparatus which concerns on embodiment of this invention. 1 is a configuration diagram of an information display system including an information display device 1. FIG. It is a sequence figure at the time of the information display apparatus 1 being delivered to holders, such as qualification. 4 is a diagram showing information stored in an information display device 1. FIG. It is a figure which shows the information memorize | stored in the certification content database. It is a flowchart of an expiration date determination display change process. It is a flowchart of a battery voltage determination display change process. It is a sequence diagram when updating the expiration date of the content of certification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Information display apparatus 2 ... Wireless communication device 3 ... Client computer 4 ... Network 5 ... Certification content database 6 ... Information distribution server 7 ... Time distribution server 11 ... Battery 12 ... Display part 13 ... Control part 14 ... Antenna 15 ... Clock

Claims (3)

Display means for displaying information to be displayed by the power of the battery and holding the display contents even when the battery power is insufficient;
The threshold voltage of the battery, the certification content information indicating the content of the certification transmitted from the predetermined information distribution server and received at once, the expiration date information indicating the expiration date of the certification content, and the certification Storage means for storing invalid display information displayed when the contents are invalid, and voltage shortage display information displayed when the battery voltage is insufficient,
Means for causing the display means to display the proof content information;
In the state where the proof content information is displayed on the display means, it is determined whether or not the expiration date of the expiration date information has passed by the power of the displayed battery, and the display content when it is determined that the expiration date has passed. Expiry date determination display changing means for changing the certification content information to the invalid time display information,
Displayed when it is determined whether the voltage of the battery is lower than the threshold voltage in a state where the proof content information is displayed on the display means, and is determined to be lower than the threshold voltage. A portable information display device comprising: battery voltage determination display changing means for changing the content from the proof content information to the display information when the voltage is insufficient. A computer program for operating a computer as each means constituting the information display device according to claim 1. A recording medium storing the computer program according to claim 2 .

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