JP5082822B2 - Image display system, image information control device for electronic paper, and image information control program for electronic paper - Google Patents

Description

  The present invention relates to an image display system, an electronic paper image information control apparatus, and an electronic paper image information control program.

  In mobile information terminals such as mobile phones, various techniques are known that complement the display screen size limitation. For example, Patent Document 1 discloses that an image such as so-called content displayed on a mobile phone is transmitted and displayed on a digital television by infrared communication or the like. Patent Document 2 discloses the use of so-called electronic paper.

JP 2002-101457 A JP 2006-157725 A

  By the way, the above-mentioned patent document does not disclose a technique for restricting image content displayed by electronic paper or the like. For example, a display image is viewed by a third party, and depending on the content, information leakage such as confidential information is disclosed. May occur.

  It is an object of the present invention to provide an image display system, an electronic paper image information control device, and an electronic paper image information control program that suppress the occurrence of information leakage due to an image displayed on the electronic paper.

The invention according to claim 1 relates to an information terminal for adding first restriction information for restricting display of an image based on the image information on the electronic paper to the image information, and the first restriction information. And receiving the first restriction information and the second restriction information, and receiving an image based on the collation result between the first restriction information and the second restriction information. a first transmission means for transmitting the image information when the display of an image based on the information satisfies the conditions allowed, a storage means for storing history information about the history of a transmission time and transmit the location of the image information, the history information An electronic paper image information control device having a second transmission means for transmitting to an information terminal, and an electronic paper for displaying an image on the electronic paper based on image information received from the first transmission means of the electronic paper image information control device table Possess a control device, the electronic paper image information control apparatus is characterized by comprising limiting means for limiting a user of the electronic paper image information control apparatus holder of the image information control apparatus for electronic paper An image display system.

The invention according to claim 2 is the invention according to claim 1, wherein each of the first restriction information and the second restriction information is position information having a hierarchical structure, and the first transmission means includes: The image information is transmitted to the electronic paper display control device when all the conditions regarding the items of the position information match.

The invention of claim 3 is the invention according to claim 1 or 2, the first control information and second control information comprises between zone information when about the image viewable time zones, the electronic image information control apparatus for paper, further comprising a monitor which monitors the current time information on the current time, the first transmission means, the current time represented by the current time information grasped by grasping means, the received time slot information In the case of belonging to the time zone to be represented , the image information is transmitted to the electronic paper display control device .

According to a fourth aspect of the present invention, there is provided an image information control device for electronic paper, the first information for restricting display of an image based on the image information on the electronic paper added to the image information by the information terminal. When the condition for permitting the display of the image based on the image information based on the collation result between the restriction information and the second restriction information related to the first restriction information transmitted from the portable information terminal is satisfied First transmission means for transmitting image information to an electronic paper display control device for displaying an image based on the image information on electric paper, and holding means for holding history information regarding the history of transmission time and transmission location of the image information If a second transmission means for transmitting the history information to the information terminal, and limiting means for limiting a user of the electronic paper image information control apparatus holder of the image information control apparatus for electronic paper, a An image information control apparatus for electronic paper, which comprises.

According to a fifth aspect of the present invention, there is provided a computer configured in the electronic paper image information control device for restricting display of an image based on the image information added to the image information by the information terminal on the electronic paper. The conditions under which the display of the image based on the image information is permitted based on the collation result between the first restriction information and the second restriction information transmitted from the portable information terminal and related to the first restriction information. When satisfied, the first transmission means for transmitting the image information to the electronic paper display control device for displaying the image based on the image information on the electric paper, and the history information regarding the transmission time of the image information and the history of the transmission location are held. A holding means, a second sending means for sending history information to the information terminal, and a user who restricts a user of the electronic paper image information control device to a holder of the electronic paper image information control device An electronic paper image information control program for causing a function unit as.

  According to the first aspect of the present invention, it is possible to suppress the occurrence of information leakage due to the image displayed on the electronic paper.

  According to the second aspect of the present invention, the image displayed on the electronic paper can be further restricted by the position information as compared with the case where the present configuration is not provided.

  According to the third aspect of the present invention, it is possible to further restrict the image displayed on the electronic paper including the displayable time as compared with the case where the present configuration is not provided.

  According to the invention described in claim 4, it is possible to suppress the occurrence of information leakage due to the image displayed on the electronic paper.

  According to the invention described in claim 5, it is possible to suppress the occurrence of information leakage due to the image displayed on the electronic paper.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram of an image display system to which an electronic paper image information control apparatus (hereinafter simply referred to as an adapter) according to the first embodiment is applied.

  As shown in FIG. 1, the image display system includes a restriction information adding terminal 10, a mobile phone 20, an electronic paper display control device 30, an electronic paper 31, an adapter 40, and the like. The restriction information adding terminal 10, the mobile phone 20, and the electronic paper display control device 30 are connected to the adapter 40 by wire such as a cable or a cord as necessary. The connection form may be established by wireless communication such as Bluetooth (registered trademark), Wi-Fi (registered trademark), IrDA (Infrared Data Association). An RFID function may be used.

The restriction information adding terminal 10 is an example of the information terminal of the present invention, and is configured by an information terminal such as a so-called PC (Personal Computer). More specifically, it is composed of input means such as a keyboard and a mouse, display means such as a liquid crystal display and a CRT display, and control means such as a computer for controlling these.
The restriction information adding terminal 10 is operated by a user through an input unit, and adds restriction information as first restriction information of the present invention to image information that is a source of an image displayed on the electronic paper 31. This restriction information is information for restricting the image to be displayed on the electronic paper 31, and includes, for example, use place information regarding the use place of the image, displayable start time and displayable end time information, and the like. Note that the position information is not limited as long as the image displayed on the electronic paper 31 can be limited. The restriction information adding terminal 10 transmits the image information with the usage place information added to the adapter 40 via a cable or the like.

  The mobile phone 20 is an example of the mobile information terminal of the present invention, and is a mobile phone having a GPS (global positioning system) function. The mobile phone 20 is operated by a user and acquires position information as second restriction information of the mobile phone 20 by the GPS function. Moreover, you may make it acquire the present | current time information regarding the present | current time and include it in 2nd restriction | limiting information as needed. The second restriction information is not limited to position information or the like as long as it has relevance with the first restriction information described above. The mobile phone 20 transmits position information and the like to the adapter 40 via a cable and the like. Note that PDA (Personal Digital Assistants) or the like may be used instead of the mobile phone 20. The location information may be acquired from a base station of the mobile phone 20 or a so-called hot spot that provides a wireless LAN service.

  The electronic paper display control device 30 is an example of the electronic paper display control unit of the present invention, and a known display control device can be used according to the driving method of the electronic paper 31 to be used. For example, in the case of optical writing type electronic paper, an image to be displayed is converted into a one-dimensional or two-dimensional optical image, and recording is performed by irradiating the photoelectric conversion layer of the electronic paper to which a voltage is applied. In addition, when a matrix electrode is arranged on the electronic paper 31 to form a dot matrix image, the drive circuit of the matrix circuit and the matrix electrode of the electronic paper 31 are connected to control display of the image.

  The electronic paper 31 is composed of, for example, optical writable electronic paper that combines OPC (Organic Photoconductors) and a microencapsulated cholesteric liquid crystal display material. In the present embodiment, by using the electronic paper 30 that is lightweight and excellent in portability, for example, it can be seen immediately regardless of the feature of quick electronic reporting, time and place, and is easy to use. This is preferable because it can exhibit both the characteristics of the paper document. In addition, although what hold | maintains display content with a non-power supply is used preferably, what is equipped with power supplies, such as a solar cell, and hold | maintains display content with the electric power of the said power supply may be used.

  Note that the electronic paper 31 and the electronic paper display control device 30 may be integrated, or the display medium portion (electronic paper 31 portion) may be commutatively configured. In the latter case, even when the electronic paper 31 is replaced with another electronic paper 31, the electronic paper display control device 30 is shared, so that the system can be realized at low cost and the display medium is also reduced in weight. As a convenience. In addition, since the image is not rewritten when the display medium is not connected to the electronic paper display control device 30, it is rewritten and displayed as an image other than the image permitted to be displayed based on the first and second restriction information. Risk can be reduced.

  The adapter 40 is an example of an electronic paper image information control device and an electronic paper image information control unit according to the present invention, and is configured by a so-called computer. The adapter 40 has a charging function, receives image information with use location information from the restriction information adding terminal 10, position information from the mobile phone 20, etc., and electronic paper display control device 30 for image information according to these information. Switch whether to send to. For example, if the usage place information and the position information match, the image information is transmitted to the electronic paper display control device 30. From the viewpoint of portability, the size of the adapter 40 is preferably, for example, about the size of a passport, business card, or employee ID card, and is preferably made of a resin material such as plastic from the viewpoint of weight reduction. Thus, by separating the adapter 40 from the electronic paper display control device 30 and the electronic paper 31 and making them separate, unintended image display by the electronic paper display control device 30 or the like can be avoided, and there is a possibility of information leakage. descend. Further, by forming a lamp or the like indicating the charging capacity, the remaining approximate operating time may be made visible to the user.

Here, the adapter 40 described above will be described in more detail with reference to FIGS.
2 is a functional block diagram showing a hardware configuration of the adapter 40, and FIG. 3 is a functional block diagram showing a main configuration of the adapter 40. As shown in FIG.

  As described above, the adapter 40 is a computer, that is, as shown in FIG. 2, a processing device such as a CPU 40a, SRAM (Static Random Access Memory), DRAM (Dynamic RAM), SDRAM (Synchronous DRAM), NVRAM (Non Volatile RAM). ) And the like, a ROM (Read Only Memory) 40c such as a flash memory, and an I / F (interface) 40d for inputting / outputting to / from external devices such as the restriction information adding terminal 10 and the mobile phone 20 are connected by a bus 40e Realized by hardware configuration.

  Therefore, each function in the adapter 40 is realized by the CPU 40a reading a required program stored in the ROM 40c and performing calculations according to the program. Further, the restriction information adding terminal 10, the control unit of the mobile phone 20, and the electronic paper display control device 30 have the same configuration. In addition, as such a program, it can be set as the program according to the flowchart mentioned later.

  As shown in FIG. 3, the adapter 40 includes a first receiving unit 41, a second receiving unit 42, a restriction information determining unit 43, an image transmitting unit 44, and the like. The limiting information determination unit 43, the image transmission unit 44, and the like constitute transmission means of the present invention.

  When the first receiving unit 41 detects that the adapter 40 and the restriction information adding terminal 10 are connected by a cable or the like, the first receiving unit 41 receives image information with use location information transmitted from the restriction information adding terminal 10. As the first receiving unit 41, a USB (Universal Serial Bus) connection or the like may be used. When the first receiving unit 41 completes the receiving process, the first receiving unit 41 transmits the image information with usage location information to the restriction information determining unit 43.

  When the second receiving unit 42 detects that the adapter 40 and the mobile phone 20 are connected by a cable or the like, the second receiving unit 42 receives position information or the like transmitted from the mobile phone 20. A USB connection or the like may be used as the second receiving unit 42. When the second receiving unit 42 completes the receiving process, the second receiving unit 42 transmits position information and the like to the restriction information determining unit 43.

  The restriction information discriminating unit 43 collates the usage location information of the image information with usage location information transmitted from the first receiving unit 41 with the position information transmitted from the second receiving unit 42, and based on the collation result It is determined whether or not a condition for permitting image display based on image information is satisfied. Then, the result is added to the image information with use location information. For example, when the usage location information matches the location information, it is determined that the above condition is satisfied, and transmission permission that the image information including the usage location information is a transmission target to the electronic paper display control device 30 is permitted. Add information. When the restriction information determination unit 43 finishes the determination process for the image information with use location information, the restriction information determination unit 43 transmits the image information with use location information that is a transmission permission target to the image transmission unit 44. Note that whether or not the above condition is satisfied is not limited to the coincidence between the use location information and the position information, and may be, for example, a condition for limiting the display time or a condition for limiting the display date and time.

  When receiving the image information with use location information from the restriction information determination unit 43, the image transmission unit 44 removes the use location information portion and transmits the image information portion to the electronic paper display control device 30. The first receiving unit 41, the second receiving unit 42, and the image transmitting unit 44 may be combined to use one USB connection or the like.

Next, the operation of the adapter 40 will be described with reference to FIGS.
4 is a flowchart showing an example of the operation of the adapter 40, and FIG. 5 is an example of image information with usage location information.

  As shown in FIG. 4, the adapter 40 first continues in a standby state until the restriction information addition terminal 10 is connected via a cable or the like (step S1). When the restriction information addition terminal 10 is connected, Use location information-added image information is received from the restriction information addition terminal 10 (step S2).

  As shown in FIG. 5, the usage location information-added image information includes identification information, image information, usage location information, and the like. For example, the identification information “0001” indicates that the image information “image A (natural scenery)” can be used at the usage location “Hokkaido”. In the present embodiment, the use location information is a prefecture, but it may be a country or a city. Further, the identification information is not limited to numbers but may be alphabets or the like. Furthermore, various types of image information such as a BMP image, a TIFF image, and a JPEG image can be used.

  Next, the adapter 40 continues in a standby state until the mobile phone 20 is connected (step S3). When the mobile phone 20 is connected, the adapter 40 receives position information from the mobile phone 20 through the GPS function (step S4). . Note that the position information includes, for example, prefectures.

  Here, the adapter 40 determines whether or not the usage location information of the image information with usage location information described above matches the location information (step S5). This determination process is performed in ascending or descending order for each piece of identification information. If it is determined that the usage location information of the image information with usage location information matches the location information, transmission permission information as a transmission target is added to the image information with usage location information (step S6).

  For example, when the location information received from the mobile phone 20 is “Tokyo”, first, a determination process is performed with the usage location information “Hokkaido” of the identification information “0001”. In this case, since the position information and the usage location information do not match, the process proceeds to the next identification information “0002”. At this time, stop information (for example, a flag) indicating that transmission to the electronic paper display control device 30 is stopped may be added to the image information with use location information. Next, a determination process is performed for the usage location information “Tokyo” of the identification information “0002”. In this case, since the location information and the usage location information match, transmission permission information as a transmission target (for example, a flag different from the flag of the stop information) is added to the usage location information-added image information. The same applies to processing for subsequent identification information.

  The adapter 40 continues the transmission standby state while holding the use location information-added image information to which the transmission permission information is added until the electronic paper display control device 30 is connected (step S7), and the electronic paper display control device. When 30 is connected, the image information portion of the image information with use location information to which the transmission permission information is added is transmitted (step S8).

  As described above, the image to be displayed on the electronic paper 31 is displayed by being limited by the position of the mobile phone 20 and the use place added to the image information held by the adapter 40. Thereby, the occurrence of information leakage is suppressed by the image by the electronic paper 31.

  The adapter 40 and the electronic paper display control device 30 can be integrated into one device, but the convenience of the electronic paper 31 may be impaired due to the increase in size of these control devices. It is desirable to have a body device.

  By using the electronic paper display control device 30 as a common output device and restricting users for each of the plurality of adapters 40, security can be managed for each owner of the adapter 40, and the overall system is lightweight. The convenience will be improved.

  In the case of a separate device, authentication is performed between the adapter 40 and the electronic paper display control device 30 so that no image is output from an unspecified electronic paper display control device 30 existing in the vicinity. Is preferred. As for the authentication method, a known wireless verification method may be used.

  In addition, the first restriction information and the second restriction information may be the same information, and their match may be used as a condition for outputting image information in the adapter 40. In order to further increase security, for example, the first restriction information may be used. Whether or not an image can be displayed can be determined based on information obtained from a predetermined decryption method or calculation method using the information and the second restriction information as keys.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 6 is an example of image information with usage location information.

  The image information with use location information according to the present embodiment is different from the image information with use location information described in the first embodiment in that the use location information has a hierarchical structure. That is, according to the figure, the use location information includes not only the prefecture but also the municipalities included in the prefecture. Furthermore, you may make it include the town-cho included in the municipality.

  Therefore, in the present embodiment, the location information received by the mobile phone 20 using the GPS function may be the prefecture and the municipality, etc., in addition to the prefecture and the municipality that the usage location information has. Good. Then, when all the items (prefectures, municipalities, etc.) of the usage location information and the location information match, the adapter 40 transmits the image information portion of the matching usage location information to the electronic paper display control device 30. do it.

  As described above, by using the usage location information in a hierarchical structure, it is possible to further restrict the image to be displayed on the electronic paper display control device 30 as compared with the first embodiment. It becomes.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 7 is an example of image information with usage location information.

  The image information with use location information according to the present embodiment includes time information such as display start time information and display end time information with respect to the image information with use location information described in the first embodiment and the second embodiment. Is different. That is, these pieces of time information indicate the displayable start time and displayable end time of the image on the electronic paper 31.

  Therefore, in the present embodiment, the information received by the mobile phone 20 using the GPS function receives the current time information in addition to the position information. The adapter 40 is a case where all items of the usage place information and the position information match, and the current time information is included in the displayable time information formed by the display start time information and the display end time information. The image information portion of the image information with use location information that satisfies the condition may be transmitted to the electronic paper display control device 30.

  As described above, by adding time information to the usage location information, it is possible to further restrict the image to be displayed on the electronic paper 31 compared to the first and second embodiments. It becomes possible.

  For example, when the user carries the mobile phone 20, the electronic paper display control device 30, the electronic paper 31, and the adapter 40 to the destination, and the electronic paper display control device 30 displays the image held by the adapter 40 at the destination. The position information and the current time information of the target value are received by the mobile phone 20, whether the position information matches the usage location information in the adapter 40, and the current time information is displayable time information in the adapter 40. Whether the image is displayed on the electronic paper 31 at the target value is determined depending on whether the image is included in the image.

  That is, by restricting the use location or the like in advance on the image to be displayed on the electronic paper 31 and holding the image on the adapter 40, the display of the image on the electronic paper 30 is restricted depending on the position of the user or the like. It will be. Thereby, the display outside the displayable time of the image is avoided, and information leakage due to the image content is suppressed.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific embodiments according to the present invention, and various modifications are possible within the scope of the gist of the present invention described in the claims.・ Change is possible. For example, the program of the present invention can be provided not only by communication means but also stored in a recording medium such as a CD-ROM.

  For example, a storage device may be configured in the adapter 40 and image information with usage location information that does not match may be held. When displaying an image with another target value while carrying the adapter 40, it is not necessary to re-hold the image, which is highly convenient.

  Further, the restriction information adding terminal 10 encrypts the image information by various algorithms, calculates a hash value by a hash function based on the usage location information and the like, adds it to the image information, and holds it in the adapter 40. It may be. In this case, a decryption function for decrypting the encrypted image information may be formed in the adapter 40, and a hash value based on a hash function based on position information transmitted from the mobile phone 20 is calculated and used. Compared with the hash value based on the location information, the image information may be transmitted if they match. As an encryption algorithm, for example, DES, AES, RSA, MD5, SHA-1, HMAC-MD5, UMAC2 / 8, elliptic curve cryptosystem, or the like can be used.

  Furthermore, a history holding function may be formed in the adapter 40 so that history information relating to a history such as a transmission time and a transmission location is held each time image information is transmitted to the electronic paper display control device 30. History information may be transmitted to the restriction information adding terminal 10 for history management. Thereby, it is possible to visually recognize when and where the image is displayed.

  Furthermore, in this embodiment, the match / mismatch of the restriction information is determined by the character string. However, an identification number or the like corresponding to the character string is assigned in advance, and the determination process is performed by determining the identification numbers. Can be speeded up.

  According to the present invention, since information leakage due to image contents is suppressed in image display on electronic paper, industrial applicability as security technology is high.

It is a block diagram of an image display system. It is a functional block diagram which shows the hardware constitutions of an adapter. It is a functional block diagram which shows the principal part structure of an adapter. It is a flowchart which shows an example of operation | movement of an adapter. It is an example of image information with usage location information. It is an example of image information with usage location information. It is an example of image information with usage location information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Restriction information addition terminal 20 Mobile phone 30 Electronic paper display control apparatus 31 Electronic paper 40 Adapter 40a CPU
40b RAM
40c ROM
40d I / F
40e bus 41 first receiving unit 42 second receiving unit 43 restriction information determining unit 44 image transmitting unit

Claims (5)

An information terminal for adding, to the image information, first restriction information for restricting display of an image based on the image information on the electronic paper;
A portable information terminal that transmits and receives second restriction information related to the first restriction information;
Conditions under which the first restriction information and the second restriction information are received, and display of an image based on the image information is permitted based on a collation result between the first restriction information and the second restriction information. a first transmission means for transmitting the pre-Symbol image information when filled with a storage means for storing history information about the history of a transmission time and transmit the location of the image information, the transmitting the history information to the information terminal An image information control device for electronic paper having two transmission means ;
Have a, an electronic paper display control device for displaying the image on the electronic paper based on the image information received from the first transmitting means of the electronic paper image information control apparatus,
The electronic paper image information control device includes a restricting unit that restricts a user of the electronic paper image information control device to a holder of the electronic paper image information control device . Each of the first restriction information and the second restriction information is position information having a hierarchical structure,
2. The image display system according to claim 1, wherein the first transmission unit transmits the image information to the electronic paper display control device when all the conditions regarding the items of the position information match. . It said first control information and second control information comprises between zone information when about the image can be displayed time zone,
The electronic paper image information control device further comprises grasping means for grasping current time information regarding the current time,
When the current time indicated by the current time information grasped by the grasping means belongs to the time zone indicated by the received time zone information, the first transmission means transmits the image information to the electronic paper display control device. the image display system according to claim 1 or 2, characterized in that to send to. An image information control device for electronic paper,
Related to the first restriction information added to the image information by the information terminal for restricting the display of the image based on the image information on the electronic paper and the first restriction information transmitted from the portable information terminal An electronic device for causing the electric paper to display an image based on the image information when a condition for permitting display of the image based on the image information is satisfied based on a collation result with the second restriction information having the property First transmission means for transmitting image information to a paper display control device ;
Holding means for holding history information related to the history of the transmission time and transmission location of the image information;
Second transmission means for transmitting the history information to the information terminal;
Limiting means for limiting a user of the electronic paper image information control device to a holder of the electronic paper image information control device;
An image information control apparatus for electronic paper, comprising: A computer configured in an electronic paper image information control device ,
Related to the first restriction information added to the image information by the information terminal for restricting the display of the image based on the image information on the electronic paper and the first restriction information transmitted from the portable information terminal An electronic device for causing the electric paper to display an image based on the image information when a condition for permitting display of the image based on the image information is satisfied based on a collation result with the second restriction information having the property First transmission means for transmitting image information to a paper display control device ;
Holding means for holding history information relating to the history of the transmission time and the transmission location of the image information;
Second transmission means for transmitting the history information to the information terminal;
Limiting means for limiting a user of the electronic paper image information control device to a holder of the electronic paper image information control device;
An image information control program for electronic paper, characterized in that it functions as an electronic paper.

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