JP2010224358A - Information display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information display device capable of quickly and easily recognizing the feature of an updated page and easily retrieving a target page. <P>SOLUTION: A continuous page updating operation part is provided, a composite page for which the feature area of an updating page is superimposed on the front surface of the updating page is generated and display to a display part is updated when the continuous page updating operation part is operated, and the generation of the composite page and updating are repeatedly performed while the continuous page updating operation part is operated. Thus, the information display device capable of quickly and easily recognizing the feature of the updated page and easily retrieving the target page is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an information display device, and more particularly to an information display device using an electrochemical display element.

  In recent years, with the increase in the operating speed of personal computers, the spread of network infrastructure, the increase in capacity and price of data storage, etc., information such as documents and images that were conventionally provided in printed materials on paper has become easier. Opportunities to obtain and browse electronic information are increasing.

  As a means for browsing such electronic information, conventional liquid crystal displays and CRTs, and in recent years, light-emitting displays such as organic EL displays are mainly used. It is necessary to watch the light-emitting display as a browsing means for a long time.

  However, light-emitting displays generally suffer from shortcomings such as eye fatigue due to flicker, restrictions on reading posture due to inconvenience of carrying, and the need to focus on a static screen. To do is not necessarily a human-friendly way. Furthermore, the light-emitting display also has drawbacks such as increased power consumption when used for a long time.

  On the other hand, a memory-type reflective display that uses external light and does not consume power for image retention is known as a display means that compensates for the above-described drawbacks, but has sufficient performance for the following reasons. It's hard to say.

  That is, the method using a polarizing plate such as a reflective liquid crystal has a low reflectance of about 40% and is difficult to display white, and many of the production methods used for producing the constituent members are not easy. In addition, the polymer dispersed liquid crystal requires a high driving voltage and uses the difference in refractive index between organic substances, so that the contrast of the obtained image is not sufficient. In addition, the polymer network type liquid crystal has problems such as a high driving voltage and a complicated circuit required to improve the memory performance.

  In addition, a display element using an electrophoretic method also requires a high driving voltage of 10 V or more, and image quality deterioration is likely to occur due to electrophoretic particle aggregation. Aggregation can be reduced by using a partition structure in which electrophoretic particles are subdivided into a certain amount, but the cell configuration and process are complicated, and stable production is difficult.

  Therefore, as a display method for solving the disadvantages of the above-mentioned respective methods, an electrodeposition (hereinafter referred to as ED) type display element (electrochemical display element; hereinafter referred to as ED element) using dissolution precipitation of a metal or a metal salt. Is attracting attention. The ED system can be driven at a low voltage of 3 V or less, and has features such as a simple cell configuration and excellent display quality such as bright paper-like white and tightened black. In addition, since it has a memory property, it does not consume power for image retention.

  Here, the display principle of the ED element will be briefly described with reference to FIG. Here, it is assumed that the ED element 17 includes two pixels 11a and 11b.

  10A and 10B, the ED element 17 includes a pixel electrode 111a of the pixel 11a and a pixel electrode 111b of the pixel 11b provided on the driving substrate 101 and a pixel 11a provided under the common substrate 103. 11b and the common electrode 113 common to the electrolyte solution 123, for example, an electrolyte layer 121 in which silver ions 125 are dissolved is sandwiched.

  The common electrode 113 is usually a transparent electrode such as an ITO (indium tin oxide) electrode, and the pixel electrodes 111a and 111b are usually a chemically stable metal such as a silver electrode.

  In FIG. 10A, when the switch SW1 is closed, as the common voltage Vcom of the common electrode 113, a negative voltage −Vb equal to or higher than the threshold is applied to the pixel electrode 111a, and electrons are injected from the common electrode 113. A silver layer 127 in which silver ions 125 are reduced is deposited at a position where the common current Icom flows and faces the pixel electrode 111 a of the common electrode 113. When this is seen from the common electrode 113 side, the portion where the silver layer 127 is deposited appears black. At this time, since the switch SW2 is OFF, no voltage is applied between the common electrode 113 and the pixel electrode 111b, and no silver layer 127 is deposited.

  Similarly, in FIG. 10B, when a positive voltage Vw equal to or higher than the threshold is applied to the pixel electrode 111a as the common voltage Vcom of the common electrode 113, the common electrode 113 is positioned at a position facing the pixel electrode 111a. The deposited silver layer 127 is oxidized into silver ions 125 and dispersed in the electrolyte solution 123. At this time, since the switch SW2 is off, no voltage is applied between the common electrode 113 and the pixel electrode 111b.

  The state in which the silver layer 127 is changed to the silver ion 125 is transparent when viewed from the common electrode 113 side. Therefore, the electrolyte layer 123 is colored white or a white layer is formed by providing a diffusion layer on the pixel electrode. appear. In this way, it is possible to switch between white and black display. By arranging the pixels 11a and 11b of the ED element described above in a two-dimensional matrix form on the driving substrate 101, a two-dimensional display can be configured.

  In FIG. 10, it is assumed that the voltage is applied to the pixels 11a and 11b of the ED element 17 using the switches SW1 and SW2, but normally, the voltage is applied using two TFTs (thin film transistors) per pixel as switches. It is driven by a so-called active matrix system generally used in organic EL display devices and the like.

  Next, a method for performing gradation display by controlling the time during which the deposition voltage is applied to the pixel electrode with the ED element will be briefly described with reference to FIG.

  In FIG. 11, when a negative deposition voltage −Vb is applied as the common voltage Vcom of the common electrode 113, a common current Icom that first increases and gradually decreases from the pixel electrode 111 a toward the common electrode 113. A silver layer 127 is deposited at a position where the common electrode 113 faces the pixel electrode 111a. When the deposited silver layer 127 is viewed from the common electrode 113 side, the display density D of the pixel 11a is changed from the white display W to the gray display G and the black display B as the application time tp of the voltage −Vb becomes longer. It changes deeply.

  Therefore, by controlling the application time tp of the voltage −Vb to the time tg until the gray display G or the time tb until the black display B, the three-value display of white, gray, and black becomes possible. Further, by dividing the application time tp of the density D, that is, the voltage −Vb more finely, multi-value display of three or more values can be performed.

  For example, Patent Document 1 discloses a method of performing gradation display by controlling the time during which a pixel circuit applies a deposition voltage for depositing metal to the pixel electrode, and a method of changing the deposition voltage in multiple stages. ing.

Japanese Patent No. 3985667

  By the way, when browsing electronic information with the information display device using the ED element described above, there are more problems than when browsing with a paper document. One example is a page search that searches for a target page. In the case of a paper document, the user quickly turns the page and finds the target page while thinking about the characteristics of the target page such as a figure or graph on the target page.

  In order to realize a quick search similar to a paper document with an information display device, first, the information display device needs to have high-speed response. In order to realize an efficient search by the information display device, for example, a method of increasing the density of the characteristic portion of each page described above to make the display prominent can be considered.

  However, as described above, in the ED element, since the density control is performed with the voltage application time, in order to make the density high and to make the display conspicuous, it takes time to display and the high-speed response is difficult. It is difficult to achieve a quick search similar to a paper document.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an information display device capable of quickly and easily grasping the characteristics of a displayed page and easily searching for a target page.

  The object of the present invention can be achieved by the following constitution.

1. A display for displaying information;
A display control unit for controlling display of the display unit;
In an information display device comprising an operation unit that instructs to update the display of the display unit,
The operation unit includes a page update operation unit and a continuous page update operation unit,
The display control unit
When the page update operation unit is operated, the display on the display unit is updated by one page,
When the continuous page update operation unit is operated, a composite page is generated by superimposing a feature region having a feature serving as a clue for search on a part of the update page on the update page. An information display apparatus that updates a display to the composite page and repeatedly generates a composite page and updates the display on the display unit while the continuous page update operation unit is operated.

  2. 2. The information display device according to 1, wherein the feature area is at least one of a figure, a table, a graph, an image, an additional write area, and a page number on the update page.

  3. 2. The information display apparatus according to 1, wherein the feature area is a mark representing the content of the feature area in the update page prepared in advance.

  4). 2. The information display device according to 1, wherein the feature area is handwritten information in the update page and original information of a portion of the update page in which the handwritten information is written.

  5. 5. The information display apparatus according to any one of claims 1 to 4, wherein the feature area is enlarged or reduced to a predetermined magnification and is superimposed and combined at a predetermined position on the front surface of the update page.

  6). 6. The information display device according to 5, wherein the predetermined position is a center of a display area of the display unit.

  7). 6. The information display apparatus according to 5, wherein the predetermined position is in the vicinity of the feature area of the update page.

  8). Any one of 1 to 7 above, wherein when the operation of the continuous page update operation unit is finished, the display on the display unit is returned from the composite page to the update page that is the source of the composite page. The information display device according to item 1.

  According to the present invention, a continuous page update operation unit is provided, and when the continuous page update operation unit is operated, a composite page in which the feature region of the update page is superimposed on the front of the update page is generated and displayed on the display unit. By repeatedly generating and updating the composite page while the continuous page update operation unit is being operated, the characteristics of the updated page can be grasped quickly and easily, and the target page can be easily searched. An information display device can be provided.

It is an external appearance schematic diagram which shows an example of a structure of 1st Embodiment of the information display apparatus in this invention. It is a circuit block diagram which shows an example of a structure of 1st Embodiment of the information display apparatus in this invention. It is a schematic diagram which shows each element which comprises the information file for browsing. It is a schematic diagram which shows the structure of the information file for browsing. It is a flowchart which shows operation | movement of 1st Embodiment. It is a flowchart which shows the subroutine of FIG. It is a schematic diagram which shows the example of a display of a synthetic | combination page. It is an external appearance schematic diagram which shows an example of a structure of 2nd Embodiment of the information display apparatus in this invention. It is a flowchart which shows operation | movement of 2nd Embodiment. It is a schematic diagram which shows the display principle of ED element. It is a schematic diagram showing a method of performing gradation display by controlling the time during which the deposition voltage is applied to the pixel electrode with the ED element.

  Hereinafter, the present invention will be described based on the illustrated embodiment, but the present invention is not limited to the embodiment. In the drawings, the same or equivalent parts are denoted by the same reference numerals, and redundant description is omitted.

  First, an example of the configuration of the information display device according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic external view showing an example of the configuration of the information display device according to the first embodiment of the present invention. FIG. 2 is a circuit block diagram showing an example of the configuration of the information display apparatus according to the first embodiment of the present invention.

  In FIG. 1, the information display device 1 includes a display unit 10 made of an ED element on the surface thereof. Further, the information display device 1 is similarly configured with a feed operation unit 51, a return operation unit 52, a continuous feed operation unit 53, a continuous return operation unit 54, and the like for operating information displayed on the display unit 10 on the surface thereof. The operation unit 5 is provided.

  Here, the feed operation unit 51 and the return operation unit 52 function as a page update operation unit in the present invention, and the continuous feed operation unit 53 and the continuous return operation unit 54 function as a continuous page update operation unit in the present invention.

  In the first embodiment, when the feed operation unit 51 or the return operation unit 52 is operated, the display on the display unit 10 is updated one page ahead or forward, and the continuous feed operation unit 53 or the continuous return operation unit is updated. When 54 is operated, a composite page in which the feature area of the update page is superimposed on the front of the update page is generated, the display on the display unit is updated to the composite page, and the continuous feed operation unit 53 or the continuous return operation unit 54 is operated. While being performed, the generation of the composite page and the update of the display on the display unit are repeated. Detailed operation will be described with reference to FIGS.

  In FIG. 2, the information display device 1 includes a display control unit 2, an operation unit 5, a storage unit 6, a display unit 10, and the like. The display control unit 2 includes a CPU 3, a display controller 4, and the like. Each part is connected via the bus 9 or directly.

  The CPU 3 expands the program stored in the ROM of the storage unit 6 on the RAM of the storage unit 6, and displays operations on the display unit 10 via the display controller 4 and each operation of the information display device 1 according to the program. To control.

  The display controller 4 controls the display of the information file for browsing stored in the storage unit 6 on the display unit 10 under the control of the CPU 3. The display controller 4 is configured by hardware logic such as a CMOS-LSI or a gate array, a microcomputer chip, or the like.

  As described above, the operation unit 5 includes the feed operation unit 51, the return operation unit 52, the continuous feed operation unit 53, the continuous return operation unit 54, and the like. Each operation member described above is connected to the CPU 3 and operates each operation of the information display device 1 such as a display operation on the display unit 10.

  The storage unit 6 includes a ROM that stores the program, a RAM that expands the program, a memory unit that stores an information file for browsing, a frame memory that temporarily stores information for one page displayed on the display unit 10, and the like. It is comprised by a means and contributes to operation | movement of CPU3 or the display controller 4. FIG.

  The display unit 10 includes an ED element and peripheral circuits, and displays an information file for browsing stored in the storage unit 6 under the control of the display controller 4.

  Next, the configuration of the information file for browsing stored in the memory unit of the storage unit 6 will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic diagram showing each element constituting an information file for browsing. FIG. 4 is a schematic diagram showing the configuration of an information file for browsing.

  In FIG. 3, the information file for browsing is composed of a plurality of pages 20, and each page 20 is composed of a page number 21, a document 22, FIG. 23, a table 24, a handwriting area 25, and the like. In the handwritten region 25, not only the handwritten line 25a and the character 25b, but also the document 22 in which they are written and the ground portion 25c of FIG. Etc. are also included.

  Here, areas other than the document 22, such as the page number 21, FIG. 23, the table 24, the handwritten area 25, and the like, which have characteristics serving as clues for searching the page 20 are referred to as the characteristic areas 28 included in the page 20. In addition, the feature area 28 includes an image 26 and an additional recording area 27. However, in the case where the document 22 is an area indicating a feature that is a clue to search for the page 20 such as a sentence in a photo book, the document 22 may be used as the feature area 28.

  In FIG. 4, an information file D20 of page 20 includes page number data D21, document data D22, figure data D23, table data D24, handwritten area data D25, image data D26 and additional area data D27 (not shown), and characteristic area attribute data. D28 etc. The feature area attribute data D28 is data relating to the attributes of the feature area 28 existing on the page 20, for example, data indicating the type (figure, table, etc.) of the existing feature area 28, its size, position, and the like. In the example of FIG. 4, the information file D20 of the page 20 composed of the data of D21 to D25 and D28 described above is formed for each page from page 1 to page 12, and stored in the storage unit 6. .

  Next, the operation of the first embodiment will be described with reference to FIGS. FIG. 5 is a flowchart showing the operation of the first embodiment. 6 is a flowchart showing the subroutine of FIG. 5, FIG. 6 (a) is a subroutine of step S23 in FIG. 5, and FIG. 6 (b) is a subroutine of step S43 in FIG.

  In FIG. 5, it is confirmed in step S11 whether or not the feed operation unit 51 has been operated. If not operated (step S11; No), the process proceeds to step S21. When operated (step S11; Yes), the display on the display unit 10 is updated to the next page in step S13, and the process returns to step S11. Here, as the next page, the next page stored in the storage unit 6 is displayed as it is.

  In step S21, it is confirmed whether or not the continuous feed operation unit 53 has been operated. If not operated (step S21; No), the process proceeds to step S31. When operated (step S21; Yes), step S23 “continuous page feed subroutine” is executed, and the process returns to step S11. Step S23 “continuous page feed subroutine” will be described with reference to FIG.

  In step S31, it is confirmed whether or not the return operation unit 52 has been operated. When not operated (step S31; No), it progresses to step S41. When operated (step S31; Yes), the display of the display unit 10 is updated to the previous page in step S33, and the process returns to step S11. Here, as the previous page, the previous page stored in the storage unit 6 is displayed as it is.

  In step S41, it is confirmed whether or not the continuous return operation unit 54 has been operated. If not operated (step S41; No), the process proceeds to step S51. When operated (step S41; Yes), step S43 “continuous page return subroutine” is executed, and the process returns to step S11. Step S43 “continuous page returning subroutine” will be described with reference to FIG.

  In step S51, it is confirmed whether or not the information display device 1 is powered off. If it is turned off (step S51; Yes), a series of operations are terminated. When not turned off (step S51; No), it returns to step S11 and each step mentioned above is repeated.

  In step S23 “continuous page feed subroutine” of FIG. 6A, in step S231, the next page and the enlarged feature area 28 of the next page are combined to generate a combined page 29. In step S233, the composite page 29 generated in step S231 is displayed on the display unit 10. An example of the display of the composite page 29 will be described with reference to FIG.

  In step S235, it is confirmed whether or not the operation of the continuous feed operation unit 53 is finished. If the process has not been completed (step S235; No), the process returns to step S231, and a combined page is generated one after another. Thereafter, the above steps are repeated.

  If completed (step S235; Yes), in step S237, the composite page 29 displayed on the display unit 10 is displayed back to the normal page 20 before composition, and the process returns to step S23 in FIG.

  In step S43 “continuous page return subroutine” of FIG. 6B, in step S431, the previous page and the enlarged characteristic area 28 of the previous page are combined to generate a combined page 29. In step S433, the composite page 29 generated in step S431 is displayed on the display unit 10. An example of the display of the composite page 29 will be described with reference to FIG.

  In step S435, it is confirmed whether or not the operation of the continuous return operation unit 54 is finished. If not completed (step S435; No), the process returns to step S431 to generate a composite page of the previous page, and thereafter, the above steps are repeated.

  If completed (step S435; Yes), in step S437, the composite page 29 displayed on the display unit 10 is displayed back to the normal page 20 before composition, and the process returns to step S43 in FIG.

  Next, an example of composite page display during continuous page feed or continuous page return operation will be described with reference to FIG. FIG. 7 is a schematic diagram illustrating an example of a composite page display. FIG. 7A is an example of a normal page 20 stored in the storage unit 6, and FIG. 7B is an example of a composite page 29. .

  In FIG. 7A, here, the normal page 20 stored in the storage unit 6 is composed of a document 22 written in alphabet and an image 26 of a human face arranged at the lower left of the page 20. Suppose that

  In FIG. 7B, a composite page 29 displayed on the display unit 10 is an image obtained by enlarging or reducing the image 26 at a predetermined magnification (for example, 2 times) in the center of the front surface of the page 20 in FIG. 26a is synthesized. As a result, the image 26 that is the feature area 28 of the page 20 is displayed as a magnified image 26a in the center of the display unit 10, so that the features of the page 20 are easily understood and the target page 20 can be easily searched.

  The size of the image 26a on the composite page 29 may be displayed at the same magnification other than the enlargement or reduction at a predetermined magnification, or the width d26a of the image 26a is displayed on the display unit 10, for example. The region may be enlarged or reduced so as to be in the range of ½ or more of the short side width d10 to the short side width d10 of the region.

  Further, the display position of the image 26 a on the composite page 29 may be, for example, directly above or near the position of the feature region 28 on the normal page 20 other than the center of the display unit 10.

  Here, the composite page 29 is generated by enlarging the image 26 itself that is the feature region 28 of the page 20, but instead of the feature region 28 itself, a mark representing the content of the feature region 28, for example, a mark representing the image 26, The composite page 29 may be generated using a mark or the like representing FIG.

  As described above, according to the first embodiment, when the continuous feed operation unit or the continuous return operation unit is operated, the composite page in which the feature area of the page is superimposed on the front of the next page or the previous page is displayed. Generate and update the display of the display unit, and repeatedly generate and update the composite page while the continuous feed operation unit or continuous return operation unit is operated, so that the features of the updated page can be grasped quickly and easily An information display device that can easily search for a target page can be provided.

  Next, an example of the configuration of the information display apparatus according to the second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a schematic external view showing an example of the configuration of the information display device according to the second embodiment of the present invention.

  The second embodiment is different from the first embodiment of FIG. 1 in that the operation unit 5 has a feed operation unit 51 that also serves as a continuous feed operation unit 53 and a return operation unit 52 that also serves as a continuous return operation unit 54. It is the point comprised only by these. Since other points are the same as those of the first embodiment, description thereof is omitted.

  Specifically, when the feed operation unit 51 is pressed once, it is recognized as a feed operation, and when the feed operation unit 51 is continuously pressed for a predetermined time or more, it is recognized as a continuous feed operation. The same applies to the return operation and the continuous return operation. Here, the feed operation unit 51 and the return operation unit 52 function as a page update operation unit and a continuous page update operation unit in the present invention.

  Next, the operation of the second embodiment will be described with reference to FIG. FIG. 9 is a flowchart showing the operation of the second embodiment. In the figure, the same step numbers are assigned to steps that perform the same operations as the steps of FIGS.

  In FIG. 9, it is confirmed in step S11 whether or not the feed operation unit 51 has been pressed. If not pressed (step S11; No), the process proceeds to step S31. If it is pressed (step S11; Yes), it is confirmed in step S61 whether or not the feed operation unit 51 has been pressed for a predetermined time or more.

  If the button has not been pressed for a predetermined time (step S61; No), it is recognized as a feed operation, and the display on the display unit 10 is updated to the next page in step S13, and the process returns to step S11. Here, as the next page, the next page stored in the storage unit 6 is displayed as it is.

  If the button has been pressed for a predetermined time or longer (step S61; Yes), it is recognized as a continuous feed operation, step S23 “continuous page feed subroutine” is executed, and the process returns to step S11. Step S23 “continuous page feed subroutine” is the same as in FIG.

  In step S31, it is confirmed whether or not the return operation unit 52 has been pressed. If not pressed (step S31; No), the process proceeds to step S51. If it is pressed (step S31; Yes), it is confirmed in step S71 whether or not the return operation unit 52 has been pressed for a predetermined time or more.

  If the button has not been pressed for a predetermined time (step S71; No), it is recognized as a return operation, and the display on the display unit 10 is updated to the previous page in step S33, and the process returns to step S11. Here, as the previous page, the previous page stored in the storage unit 6 is displayed as it is.

  If the button has been pressed for a predetermined time or longer (step S71; Yes), it is recognized as a continuous return operation, and step S43 “continuous page return subroutine” is executed, and the process returns to step S11. Step S43 “continuous page return subroutine” is the same as FIG. 6B.

  In step S51, it is confirmed whether or not the information display apparatus 1 is powered off. If it is turned off (step S51; Yes), a series of operations are terminated. When not turned off (step S51; No), it returns to step S11 and each step mentioned above is repeated.

  As described above, according to the second embodiment, in addition to the effects of the first embodiment, the feed operation unit serves both as a feed operation and a continuous feed operation, and the return operation unit serves as a return operation and a continuous return operation. By combining the two, it is possible to reduce the number of parts, reduce the cost, and simplify the operation.

  As described above, according to the present invention, a continuous page update operation unit is provided, and when the continuous page update operation unit is operated, a composite page in which the feature area of the update page is superimposed in front of the update page is generated. By updating the display on the display unit and repeatedly generating and updating the composite page while the continuous page update operation unit is being operated, the characteristics of the updated page can be grasped quickly and easily. It is possible to provide an information display device that can easily search the pages.

  It should be noted that the detailed configuration and detailed operation of each component constituting the information display apparatus according to the present invention can be updated as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Information display apparatus 2 Display control part 3 CPU
4 Display Controller 41 Common Voltage Drive Circuit 5 Operation Unit 51 Feed Operation Unit 52 Return Operation Unit 53 Continuous Feed Operation Unit 54 Continuous Return Operation Unit 6 Storage Unit 9 Bus 10 Display Unit 20 Page 21 Page Number 22 Document 23 FIG. 24 Table 25 Handwriting Area 25a (handwritten) line 25b (handwritten) character 25c ground part 26 image 26a enlarged image 27 additional area 28 feature area 29 composite page D20 (page 20) information file D21 page number data D22 document data D23 figure Data D24 Table data D225 Handwritten area data D28 Feature area attribute data

Claims (8)

A display for displaying information;
A display control unit for controlling display of the display unit;
In an information display device comprising an operation unit that instructs to update the display of the display unit,
The operation unit includes a page update operation unit and a continuous page update operation unit,
The display control unit
When the page update operation unit is operated, the display on the display unit is updated by one page,
When the continuous page update operation unit is operated, a composite page is generated by superimposing a feature region having a feature serving as a clue for search on a part of the update page on the update page. An information display apparatus that updates a display to the composite page and repeatedly generates a composite page and updates the display on the display unit while the continuous page update operation unit is operated.   The information display device according to claim 1, wherein the feature area is at least one of a figure, a table, a graph, an image, a write-once area, and a page number on the update page.   The information display apparatus according to claim 1, wherein the feature region is a mark representing the content of the feature region in the update page prepared in advance.   The information display device according to claim 1, wherein the feature region is handwritten information in the update page and original information of a portion of the update page in which the handwritten information is written.   5. The information display device according to claim 1, wherein the feature region is enlarged or reduced to a predetermined magnification and is superimposed and combined at a predetermined position on the front surface of the update page. 6. .   The information display device according to claim 5, wherein the predetermined position is a center of a display area of the display unit.   The information display device according to claim 5, wherein the predetermined position is in the vicinity of the feature region of the update page.   8. The display device according to claim 1, wherein when the operation of the continuous page update operation unit is finished, the display on the display unit is returned from the composite page to the update page that is the source of the composite page. The information display device according to claim 1.

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