JP2007034685A - Electronic paper control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain security protection or the like of each content S1, S2, S3 to be displayed on electronic paper EP, and clearly indicate use restrictions to be imposed on each content to a user. <P>SOLUTION: In the electronic paper EP, a use restriction storage means 22 holds use restriction information for each content, and a display control means 24 writes the display content of the content to a display part 2 according to the use restriction information. A certain content in a document to be displayed in the display part 2 is allowed or not allowed to be displayed according to the use restriction information, whereby secrecy protection, maintaining of identity or the like of contents is attained by restricting the use of contents. In response to a confirmation request from the user, the use restriction information retained in the use restriction storage means 22 is written in the display part and presented to the user. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to electronic paper that displays and holds content on a display unit in a writable manner, and in particular, changes the display content of content that is displayed and held on the display unit of electronic paper by setting usage restrictions for each content. Related technology.

Using a computer, electronic data of various contents such as images and texts are handled, and a document is created, edited, viewed, and the like.
Such an electronic data document browsing method is generally performed by displaying an image of a document on a display screen of a computer or printing the image of a document on a sheet of paper as a printer.

In recent years, as a medium for browsing information images that can replace paper, electronic paper has been developed that is flexible and thin like paper and can display and hold document images in a non-powered state.
The electronic paper is a device having a display unit capable of writing an information image, and there is a type having a function of writing a document image on the display unit by itself based on electronic data.
Unlike electronic paper, such electronic paper can erase or overwrite the information image displayed and held on the display unit, and can be used repeatedly, thus promoting the use from the viewpoint of saving paper resources. It is desired.

Here, regarding the use of electronic paper and contents, the following inventions are known.
In order to provide convenience for the user, a terminal can be used to provide a passbook using a paper-like electronic display medium that can be displayed in the same way as a paper passbook, and can be rearranged and statistically processed as necessary. Information data based on information data stored in the non-contact / contact IC card LSI and the non-contact / contact IC card LSI having the identity authentication means. Display control LSI that displays a non-volatile information on the non-volatile information display unit, a non-volatile information display unit that maintains the previous display contents until the next rewrite command, and a power source unit for driving display are flexible base materials A bankbook using a paper-like electronic display medium that is embedded and integrated therein and has an input means on the surface of a flexible substrate (see Patent Document 1).

  In order to provide a passport that is difficult to falsify or counterfeit a data sheet or visa sheet in the passport and solve the difficulty of using a multi-page booklet, the data input means on the passport body and the data input from the data input means Based on an electronic passport having an image display means having flexibility for displaying an image based on it, an IC chip having a microcomputer and a memory built in the passport body, data input / output means for the IC chip, and data in the IC chip An electronic passport provided with image display means having flexibility to display an image (see Patent Document 2).

  In order to provide an IC card that can be identified as a card that can be used illegally by visual inspection without checking with a terminal that has a function of checking the state of the card, at least one of the front and back surfaces is electrically In an IC card having a display unit that can be displayed on the display unit, display means for displaying visible image data on the display unit, and when an illegal operation is performed on the card, An IC card provided with display suppression means for enabling recognition of the state of the card (see Patent Document 3).

  In order to provide a card that variably changes the surface of the card and a card system that performs the change, data is transmitted and received between an IC card equipped with electronic paper and a card I / F device capable of transmitting and receiving data. Authenticate the card by comparing the authentication data in the communication contents of the communication device and the card received from the communication device with the cardholder identification data stored in the customer / card individual identification information database. Card authenticating device that performs the processing, and a control data creation device that extracts basic partial data stored in the basic control database and individual partial data stored in the individual control database to create combined data System (see Patent Document 4).

  In order to protect the copyrights of texts, photos, music, videos, etc. and to protect the interests of the copyright holders, copying, copying, and accounting are easily performed, and the copyrighted works distributed to society are monitored. In order to limit unauthorized duplication, a copyright management site is provided on the communication network to protect copyrights and to manage licensing, billing, and distribution of copyrighted works, and a copyright server connected to this site is provided. By registering and managing the copyrighted work, the copyrighted works distributed in society are properly monitored to prevent unauthorized copying. Offline copying of paper and electronic paper is the standard on the copyrighted work. A mark is printed, the amount of distribution is measured from the amount of movement, the distribution route is specified, and an appropriate fee is charged (see Patent Document 5).

  Desired content ID to be distributed from the information providing apparatus to the multi-display card in order to provide an information distribution system and an information storage display medium capable of requesting desired information corresponding to the information distribution service while ensuring security , And the content ID is transmitted from the multi-display card to the service DB, so that information corresponding to the content ID is distributed from the service DB to the multi-display card (see Patent Document 6).

  In order to provide a non-volatile display device capable of protecting the security of display contents and protecting privacy, a display device that maintains display contents even when power supply from an external device stops, and a display Display control means for controlling the display of the device and power supply stop detection means for detecting the stop of power supply from the external device are provided, and when the power supply stop detection means detects the stop of power supply from the external device, the display control means The display content of the display device is erased (see Patent Document 7).

  In order to prevent leakage of confidential data, when electronic paper passes through the entrance / exit of the confidential document room, the wireless tag reader provided at the entrance / exit indicates whether the electronic paper is recording confidential document data If the wireless tag data is read and the confidential document data is recorded, an erasure command is transmitted from the confidential document server to the electronic paper via the wireless tag reader and recorded on the taken-out electronic paper. The confidential document data is erased (see Patent Document 8).

Electronic that frees paper from its inefficient information storage and recording function, preserves the excellent display quality of paper, and easily captures and processes information printed on paper into the system In order to provide an information system, a content sharing system includes a printing device, an RFID reader, a client terminal, and a data storage management device, and includes an RFID tag on which content information stored in the data storage management device on the network is printed The correspondence relationship in which the ID code of the RFID tag of the information display medium and the content information are made to correspond to 1: 1 is registered in the data storage management device, and the RFID tag of the information display medium accompanies a request to rewrite the content information of the information display medium. The ID code is read from the ID, the content information corresponding to the ID code is retrieved from the data storage management device, Print content information to another RFID tagged information displaying medium (see Patent Document 9.).
JP 2003-248804 A Japanese Patent Laid-Open No. 2003-285581 JP 2003-296678 A JP 2004-30406 A JP 2003-303247 A Japanese Patent Laid-Open No. 2003-330829 JP 2004-69965 A JP 2004-78808 A JP 2004-302614 A

  The advantage of electronic paper is that when a document image is written on the display unit, the document image can be continuously displayed even when there is no power supply. If a document requires confidentiality, some measures are required.

In addition, for example, a confidential content in a document is inadvertently received by an unspecified number of users by a method in which a certain content of a plurality of contents included in the document is not displayed on the display unit. Although it is conceivable to prevent browsing, if such a method is adopted, it is not clear which content can be viewed by the user who uses the electronic paper, and there is inconvenience in use. There is a problem that it will occur.
Moreover, from the content provider side, for example, even in a one-page document, public content, content for a specific user, content that can be written to electronic paper (for example, can be displayed even without a power supply), temporary browsing only There are cases where content for various purposes such as content that can be displayed (for example, can only be displayed during energization), content that cannot be displayed on electronic paper, etc. may be mixed. Need to tell the user.

The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to realize content confidentiality maintenance by restricting the use of each content displayed on electronic paper by a user.
It is another object of the present invention to explicitly notify a user who uses electronic paper what usage restrictions are imposed on each content.

In the electronic paper according to the present invention, the usage restriction storage unit holds the usage restriction information for each content, and the display control unit displays the content displayed on the display unit in which the content can be written and written according to the usage restriction information. It is set as the aspect.
Therefore, depending on the usage restriction information, for example, some content in the document displayed on the display unit is displayed or not displayed (that is, no display content is displayed), and writing to the content displayed on the display unit is possible. It is possible to maintain confidentiality of the content by adopting an aspect such as enabling or disabling access to Web information from the URL included in the content displayed on the display unit. Maintaining identity can be achieved by restricting the use of content.

Here, the usage restriction information for each content may be set according to the usage status of the electronic paper. For example, the usage status of which user is using the electronic paper based on the user identification information input by the user. The usage situation where the electronic paper detected by the position sensor is used, the usage situation where the electronic paper detected by the pressure sensor is used in the user's hand, and for each electronic paper in advance The usage status of which electronic paper is used according to the set device identification information, and the usage status of whether the electronic paper is divided and used when the electronic paper is a display type and a control type. Accordingly, the display content of the content may be changed.
As a result, it is possible to set fine usage restrictions according to the usage status of electronic paper for the content.

In the electronic paper according to the present invention, a user confirmation request is received from the input means, and the display control means writes and displays usage restriction information for each content on the display unit in response to the confirmation request.
Thereby, it is possible for the user who uses the electronic paper to explicitly recognize what kind of usage restrictions are imposed on each content.

  The electronic paper according to the present invention typically includes a display unit that displays and holds content in a writable manner, and usage restriction storage means that holds usage restriction information for each content. As a result, the display control means for writing the display content of the content on the electronic paper in a manner corresponding to the usage restriction information can be configured.

The present invention can be configured as an electronic paper control system including an electronic paper having a display unit that displays and holds content in a writable manner, and a server that provides content to the electronic paper. Information provision means for providing electronic paper with usage restriction information set in advance for each electronic paper; usage restriction storage means for holding usage restriction information for each content provided from the server; A display control means for writing to the display unit in a manner corresponding to the usage restriction information is provided.
In addition, it is preferable that the server includes an input unit that receives an operator input for setting use restriction information so that the operator (information provider side) can arbitrarily set the use restriction of the content.

  According to the present invention, since the use restriction is applied to each content displayed on the electronic paper, the confidentiality of the content can be maintained, and the use restriction information is presented to the user. It is possible to explicitly notify the user who uses the electronic paper what kind of usage restrictions are imposed on each content.

The present invention will be specifically described based on examples.
The present invention can be implemented by a system configuration as shown in FIG. 1, for example. First, an electronic paper EP that can be used in the embodiment will be described with reference to examples shown in FIGS.
The electronic paper EP shown in FIGS. 11 to 13 is a thin and flexible device like paper, and this electronic paper EP is a self-rewritable type having a function of writing a document image on a display unit by itself based on electronic data. is there.

FIG. 11A shows the self-rewritable electronic paper EP in front view, and FIG. 11B shows the self-rewritable electronic paper EP in side view. The illustrated electronic paper EP has a display unit 2 that displays and holds an information image and a processing unit 3 that controls processing of electronic data. FIG. 1A shows various functional units incorporated in the processing unit 3. Is also represented.
The self-rewritable electronic paper EP is a flexible thin display recording apparatus as large as, for example, A4 size paper, and the processing unit 3 is provided on one piece of the display unit 2 that occupies most of the area. In addition, the magnitude | size of the display part 2 shall be a magnitude | size according to a use.

As will be described later, the processing unit 3 includes a driver 4 for driving the display unit 2, a communication unit 5 (for example, a wireless communication unit) for receiving information image data from an information image writing device (not shown), and reading and writing electronic data. A memory 6 that is freely held, a control unit (CPU) 7 that controls a process of writing information images to the display unit, a battery 8 that supplies operating power to functional means such as the control unit 7, and an operation that receives an operation input from a user Part 9 is provided.
The display unit 2 and the processing unit 3 may be detachable. For example, the electronic paper EP may be configured by attaching and electrically connecting the processing unit 3 in a clip format to the display unit 2. For example, when the processing unit 3 including all of the drivers 4 to 9 is detachable from the display unit 2 and the processing unit 3 is attached to the display unit 2, the driver 4 and the display unit 2 are terminals with each other. What is necessary is just to make it operate | move integrally by electrically connecting.

Such a self-rewritable electronic paper EP receives electronic data of a document image including one or more contents by communicating with an external information image writing device (a server to be described later) by the communication unit 5, and the electronic data Can be stored in the memory 6.
The self-rewritable electronic paper EP can drive the driver 4 under the control of the control unit 7 and can rewrite and display the document image on the display unit 2 based on the electronic data held in the memory 6. Even if the drive power of 4 is removed, the display unit 2 has a function to keep the document image in the display state.

  The self-rewritable electronic paper EP has fine colored particles (white particles 11 and black particles 12 in the illustrated example) used as toner in a copying machine, as shown in FIG. Is sealed between a pair of front and back electrodes 13 whose surface side is transparent, and is sandwiched between a pair of front and back film substrates 14 whose surface side is transparent. An air layer is formed between the electrode layers 13 so that the colored particles 11 and 12 can freely move, and an insulating layer 15 for preventing contact with the colored particles 11 and 12 is provided on the matrix electrode layer 13. It has been. Note that a color display can be realized with a simple structure by using a color filter.

The self-rewritable electronic paper EP is in a state in which no voltage is applied to the electrode 13 as shown in FIG. 12 showing the operation principle of the display unit 2 (however, the electrode 13 is charged to the polarity at the previous driving). The negatively charged white particles 11 accumulate on the back side, while the positively charged black particles 12 accumulate on the front side. When the display unit 2 is viewed from the front side, the display unit 2 is observed. Becomes a black state. Then, when the electrode polarity of the required part of the matrix corresponding to the document image displayed by the operation of the driver 4 based on the electronic data is reversed, the positional relationship between the white particles 11 and the black particles 12 is switched, and the display unit 2 A document image based on the contrast between the white particles 11 and the black particles 12 is displayed. In addition, by operating the driver 4 based on different electronic data, the document image displayed on the display unit 2 can be switched depending on the contrast between the white particles 11 and the black particles 12, and can be reused many times. .
Therefore, the self-rewritable electronic paper EP has the property of holding the document image displayed on the display unit 2 without power supply in addition to the property of being thin and flexible like paper, so that it can be used as if it were paper. Furthermore, the recording medium can rewrite the document image to be displayed and held many times.

FIG. 1 shows a functional configuration of an electronic paper system according to an embodiment of the present invention.
The electronic paper EP of this example is the above-described self-rewritable type, and the electronic paper EP itself modifies the display contents of the content in the document image to be written on the display unit 2 according to the usage restriction information as described later.

  The electronic paper EP of this example includes a display unit 2 that can display and hold a document image in a rewritable and non-powered state, and a communication unit 5 that communicates document data and usage restriction information with the server S (in this example, wireless communication). Section), a document memory 21 that holds the received document data, a usage restriction memory 22 that holds the received usage restriction information, an input unit 23 that inputs user operations or uses and detects usage status, and usage restriction information (and A display control unit 24 that drives the driver 4 to write a document image including content on the display unit 2 using document data held in the document memory 21 in a manner corresponding to the usage state.

  Here, in this example, the document memory 21 and the use restriction memory 22 are configured by using the memory 6 provided in the electronic paper EP, and the input unit 23 is provided in the operating unit 9 and the electronic paper PE that receive user operation input. The display control unit 24 configured by a pressure-sensitive sensor or the like and performing the control processing according to the present invention is configured by executing the program according to the present invention by the computer hardware (memory 6, processor 7, etc.) of the electronic paper EP. Has been.

  The server S in this example holds a communication unit 41 (wireless communication unit in this example) that communicates document data, usage restriction information, and the like with the electronic paper EP, and document data to be transmitted to the electronic paper EP. Provision of information for reading out document data and usage restriction information from the document file 42 and the usage restriction table 43 for transmission to the electronic file EP, a usage restriction table 43 for holding usage restriction information for transmission to the electronic file EP, and the document file 42 Unit 44, a display unit 45 for presenting usage restriction information held in the usage restriction table 43 to the operator, and an input unit 46 for receiving usage restriction information for setting and holding the usage restriction table 43 from the operator. ing.

Here, the server S of this example includes an interface (display unit 45, input unit 46) for the operator, and the usage restriction information that the operator holds in the usage restriction table 43 can be arbitrarily set by the interface.
That is, the use restriction information provided from the server S and held in the use restriction memory 22 by the electronic paper EP can be arbitrarily set by the operator.

According to the electronic paper system, document data and usage restriction information related to the document data are provided from the server S to the electronic paper EP by wireless communication between the communication units 5 and 41. In the electronic paper EP, the document data is a document data. The usage restriction information is held in the memory 21 and the usage restriction information is held in the usage restriction memory 22.
In the electronic paper EP, in response to a user request operation from the input unit 23, the display control unit 24 reads the document data and the usage restriction information from the document memory 21 and the usage restriction memory 22, respectively, and the content in the document data The data is written and displayed on the display unit 22 as a display content according to the usage information.

Further, in the electronic paper EP, in response to a user confirmation request operation from the input unit 23, the display control unit 24 reads the usage restriction information from the usage restriction memory 22, and writes and displays the contents of the usage information on the display unit 22. In this way, the user is presented with what usage restrictions are set for each content in the document.
In this example, the system configuration includes the server S. However, the document data 21 and the usage restriction memory 22 may be input with document data and usage restriction information by other means and held therein. In such a case, the present invention can be implemented with the electronic paper EP alone without using the server S.

Next, document data as shown in FIG. 2 is held in the document memory 21, and an example in which the electronic paper EP displays the document image on the display unit 2 according to the usage restriction information is used. Such an embodiment will be specifically described.
The document D shown in FIG. 2 includes three contents S1, S2, and S3, and usage restriction information as shown in the following embodiment is set for each of the contents S1, S2, and S3.

FIG. 3 shows an example of usage restriction information held in the usage restriction memory 22 of the electronic paper EP. The same applies to the following example, but in this example, the use restriction information is provided from the server S together with the corresponding document data and is held in the use restriction memory 22.
The usage restriction information in this example is a usage permission level set in association with a document ID for identifying a document and a content ID for identifying content included in the document, and is included in the same document (D1). Usage permission levels (L3, L2, L1) are set for the three contents (S1, S2, S3), respectively.
Here, the use permission level L1 is unusable (that is, display on the electronic paper is prohibited), the use permission level L2 can be displayed when the power of the electronic paper is ON, and the use permission level L3 is the electronic paper. Can be displayed even when the power is off.

When the user operates the power button of the operation unit 9 to turn on the power of the electronic paper EP and display the document data held in the document memory 21, the display control unit 24 displays the data according to the usage restriction information. As shown in FIG. 4A, the document D is written on the display unit 2 in a manner including the contents S1 and S2 without displaying the contents S3.
As described above, the display unit 2 of the electronic paper EP displays and holds the document image written on the display unit even when the power is turned off, but the power button of the operation unit 9 is used to turn off the power of the electronic paper EP. When the user operates, the display control unit 24 displays the document D on the display unit 2 in a manner including the content S1 without further displaying the content S2, as shown in FIG. Rewrite and then turn off the power.

Further, when the confirmation request button of the operation unit 9 is operated by the user and a confirmation request for the usage restriction information is input to the electronic paper EP, the display control unit 24 writes the usage restriction information held in the usage restriction memory 22 in the display unit 2. Is displayed as shown in FIG.
In the illustrated example, three content frames included in the document are displayed, and the content IDs S1, S2, and S3 and the usage permission levels (L3, L2, and L1) set for them are displayed in the frame. . Note that the usage restriction information may be in other display modes. For example, the usage restriction level may be displayed in the document by the user, such as displaying the contents of the usage permission level (for example, displayable when the power is on). It suffices if it is possible to grasp whether or not the recorded content is included.

FIG. 5 shows another example of use restriction information held in the use restriction memory 22 of the electronic paper EP.
The usage restriction information in this example is obtained by adding a user ID for identifying a user as a usage status of electronic paper, setting a user ID and a usage permission level in association with a document ID and a content ID, and the same document. For each of the three contents (S1, S2, S3) included in (D1), the usage permission level (L3: can be displayed even when the power is off) and the user ID (ALL, UA, UB) are set. Is set.

  Here, the user ID of the usage status is ALL that can be displayed for all users, UA that can be displayed only for user A, and UB that can be displayed only for user B. However, for the sake of simplicity, the use permission level is set to L3, but the display content of the corresponding content is determined in a manner set by a combination of the user ID setting and the use permission level setting.

When the user A operates the operation unit 9 to input his / her user ID (UA) to the electronic paper EP and causes the document display process to be performed, the display control unit 24 performs FIG. As shown in a), the document includes the content S1 permitted for all users and the content S2 permitted for the user A without displaying the content S3 permitted only for the user B. D is written in the display unit 2.
Similarly, when the user B operates the operation unit 9 to input his / her user ID (UB) to the electronic paper EP to perform document display processing, the display control unit 24 responds to the usage restriction information. As shown in FIG. 5B, the content S1 permitted for all users and the content S3 permitted for the user B without displaying the content S2 permitted only for the user A, The document D is written in the display unit 2 in a manner including

Therefore, the display content of the content on the display unit 2 is changed in a manner according to the situation of who the user is using the electronic paper.
Also in this example, similarly to the above example, when the confirmation request button of the operation unit 9 is operated by the user and the confirmation request for the usage restriction information is input to the electronic paper EP, the display control unit 24 holds the usage restriction information in the usage restriction memory 22. The used restriction information is written on the display unit 2 and displayed.
In addition to the user ID or in place of the user ID, the device ID assigned to each electronic paper can be used as the usage status, and similarly to the above, which electronic paper is used to display the document The display content of the content included in the document may be changed in a manner corresponding to the above.

FIG. 7 shows still another example of the usage restriction information held in the usage restriction memory 22 of the electronic paper EP.
In this example, the processing unit 3 including all of the driver 4 to the operation unit 9 and the display unit 2 are detachable, and the driver 4 and the display unit 2 are mutually connected in a state where the processing unit 3 is attached to the display unit 2. An electronic paper EP that is electrically connected to a terminal so as to operate integrally is used, and the attachment / detachment between the display unit 2 and the processing unit 3 is used as a usage situation.

The usage restriction information in this example is set by setting the attachment / detachment state between the display unit 2 and the processing unit 3 that is the usage state of electronic paper in association with the document ID, the content ID, and the usage permission level. Usage permission levels (L3, L2, and L1) are set for the three contents (S1, S2, and S3) included in (D1), and the display unit 2 and the processing unit 3 further set for these settings. Levels for wearing and taking off are set.
That is, in this example, when the display unit 2 and the processing unit 3 are in the wearing state, the same setting as in the example of FIG. 5 is performed, but when the display unit 2 and the processing unit 3 are in the detached state, only the content at the usage permission level L3 is displayed. Part 2 is displayed. Accordingly, the display content of the corresponding content is determined in a manner set by a combination of the setting for the attachment / detachment state and the setting of the use permission level.

When the display unit 2 is connected to the display unit 2 and connected to the display unit 2, the display control unit 24 performs level L1 as shown in FIG. 8A according to the usage restriction information. Without displaying the content S3, the document D is written in the display unit 2 in a manner including the content S1 and S2.
Then, as shown in FIG. 4B, when the display unit 2 and the processing unit 3 are separated, an operation to be separated is detected, and the display control unit 24 determines the level according to the usage restriction information. The document D is rewritten on the display unit 2 in a manner that includes only the content S1 of L3.

Therefore, when the processing unit 3 is removed and only the display unit 2 is carried, it is possible to control so that a highly confidential document part is not touched by human eyes.
In addition, when the display unit 2 and the processing unit 3 are mounted, when the confirmation request button of the operation unit 9 is operated by the user and the confirmation request for the usage restriction information is input to the electronic paper EP, the display control unit 24 uses the usage restriction memory 22. The usage restriction information held in is stored in the display unit 2 and displayed as shown in FIG.

FIG. 9 and FIG. 10 show still another example.
In this example, as shown in FIG. 9, the pressure sensor 10 for detecting that the user grips the input unit 23 is provided in the electronic paper EP. As shown in FIG. It is possible to detect the usage status that is held by the user and the usage status that is not held by the hand.

The usage restriction information in this example is set by setting the usage status of whether or not the electronic paper is held in association with the document ID, the content ID, and the usage permission level. For example, FIG. As shown in FIG. 4, in the situation where the user is browsing with the hand, the content of the content in the document is displayed on the display unit 2, but from the user's hand, as shown in FIGS. In the released state, the content content in the document is not displayed on the display unit 2.
For example, in a situation where the user does not hold it (for example, a situation where the user is left on the desk), the content is controlled to be displayed so that the highly confidential document portion is not inadvertently touched by the human eye. Can be controlled.

It is a functional block diagram of the electronic paper system which concerns on one Example of this invention. It is a figure explaining the content structure of the document which concerns on an example of this invention. It is a figure explaining the use restriction information which concerns on an example of this invention. It is a figure explaining the display mode of the content concerning an example of the present invention. It is a figure explaining the use restriction information which concerns on an example of this invention. It is a figure explaining the display mode of the content concerning an example of the present invention. It is a figure explaining the use restriction information which concerns on an example of this invention. It is a figure explaining the display mode of the content concerning an example of the present invention. It is a figure explaining the structure of the electronic paper which concerns on an example of this invention. It is a figure explaining the use condition of the electronic paper which concerns on an example of this invention. It is a figure which shows an example of the electronic paper which concerns on this invention. It is a figure explaining the principle of operation of electronic paper concerning an example of the present invention. It is a figure explaining the structure of the electronic paper which concerns on an example of this invention.

Explanation of symbols

2: display unit, 3: processing unit,
21: Document memory, 22: Usage restriction memory,
24: Display control unit, EP: Electronic paper,
D: Document, S1, S2, S3: Content
L1, L2, L3: usage permission level,

Claims (9)

A method for displaying a content image on an electronic paper provided with a display unit that displays and holds content in a writable manner,
An electronic paper content image display method, wherein the electronic paper holds usage restriction information for each content, and the display content of the content on the display unit is set in a mode corresponding to the usage restriction information. The electronic paper content image display method according to claim 1,
The usage restriction information is set according to the usage state of electronic paper,
A method for displaying an electronic paper content image, wherein the electronic paper acquires its own usage status, and the display content of each content is changed to an aspect corresponding to the usage status. The content image display method for electronic paper according to claim 1 or 2,
An electronic paper content image display method, wherein the electronic paper receives a confirmation request from a user and displays usage restriction information for each content on a display unit in response to the confirmation request. An electronic paper having a display unit for displaying and holding content in a writable manner,
Usage restriction storage means for holding usage restriction information for each content;
Display control means for writing the display content of the content on the display unit in a manner corresponding to the usage restriction information;
Electronic paper characterized by comprising. The electronic paper according to claim 4.
The usage restriction information is set according to the usage state of electronic paper,
The electronic paper further includes an input means for acquiring the usage status of the electronic paper,
The electronic paper according to claim 1, wherein the display control means sets the display content for each content according to the usage status. The electronic paper according to claim 4 or 5,
The electronic paper further includes input means for receiving a confirmation request from the user,
The display control means writes and displays usage restriction information for each content on a display unit in response to the confirmation request. A program for controlling electronic paper, comprising: a display unit that displays and holds content in a writable manner; and usage restriction storage means that holds usage restriction information for each content,
An electronic paper control, wherein a computer that controls the electronic paper executes the program to control display control means for writing the display content of the content on the electronic paper on the display unit in a manner corresponding to the usage restriction information. program. An electronic paper control system comprising an electronic paper having a display unit that displays and holds content in a writable manner, and a server that provides content to the electronic paper,
The server has information providing means for providing electronic paper with content and usage restriction information set in advance for each content,
The electronic paper includes usage restriction storage means for holding usage restriction information for each content provided from the server, and display control means for writing the display contents of the content on the display unit in a manner corresponding to the usage restriction information. A featured electronic paper control system. The electronic paper control system according to claim 8.
The electronic paper control system, wherein the server further includes an input unit that receives an operator input for setting the use restriction information.

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