JPH0926562A - Picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display pictures corresponding to the double spread display of a book by providing a first display part and a second display part and making display parts to be a form near to the spread display of the book while making two display parts to be freely openable and closable at a coupling part. SOLUTION: Display areas of two sheets of liquid crystal displays (LCDs) 54-1, 54-2 are made to be the same sizes. Moreover, a control panel is provided at the upper right of a frame. Further, the panel may be provided at upper left and right parts of the frame. Furthermore, the frame is folded into two parts by providing a coupling part (a hinge) 56 at the center part of the frame. This device is carried in a state in which the frame is folded in such a manner. Then, the display data from a recording medium are made to be displayed on display screens in laterally long displayings and the data are displayed in longitudinally long displayings by rotating displayed data by 90 degrees. Thus, displays are performed in accordance with the double spread of the book and pictures are made to be displayed on the LCD screens in various systems such as laterally long displaying or longitudinally long displaying, independent one screen displaying or two screen integration displaying according to the kinds of books and display data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable image display device which replaces printed matter such as books, and which has the same spread display and portability as a book and displays electronic paper surface information. .

[0002]

2. Description of the Related Art At present, as a book type display, a type using a liquid crystal display (LCD) has already been commercialized, but none of them plays a role that can replace a book in terms of resolution. That is the current L
This is because the limits of CD technology are visible. However, in order to realize the image display device using the existing display method, it is considered that the use of the LCD is optimal.

First, as for the CRT, which is generally the most popular TV monitor, there is a high-definition display, high-definition display. However, in order to achieve high definition, a large CRT is a prerequisite, and it is difficult to downsize the device. Although the LCD is satisfactory in terms of downsizing, it is a VG that has been adopted as an existing standard display in terms of resolution.
A is less than the required value. In addition, the resolution of SVGA, which has recently emerged as a higher resolution display, has approached the standard, but it is still technologically advanced in terms of downsizing the display while clearing the high resolution.

Therefore, Japanese Patent Laid-Open No. 6-138839 discloses
JP-A-3-217959 and JP-A-4-35578.
A display system using several LCDs as described in Japanese Patent No. 6 has been considered. The image display device described in Japanese Unexamined Patent Publication No. 6-138839 has a size of a paperback book or a new book, and the liquid crystal display provided in this device has a size of A6 size or less, and a two-spread liquid crystal display. And only the character is displayed as the display data. The image display device described in Japanese Patent Application Laid-Open No. 3-217959 is an image display device in which a sheet-shaped liquid crystal display is provided in a main body of an A4 size notebook spread and a key operation is substituted by an input tablet. . Further, in Japanese Patent Laid-Open No. 4-355786, a display device in which a plurality of liquid crystal displays are overlapped and bound on one side like a page of a book, and all display is performed by using one liquid crystal display independently. .

[0005]

Generally, a print medium called a book has a resolution enough to recognize even very small characters, and in order to actually display book information such as comics as an image, an existing standard is used. 2 for each character of the printer
It requires a resolution equivalent to 4 dot angles. Also, if each dot is expressed by 24 dots, the size of each character is 3 mm.
As a corner, about 8 dots / mm = about 203 dpi (dots /
Inch) resolution, and you can satisfy the book information. However, when an LCD (Liquid Crystal Display) or the like is used as a display unit instead of a book as a display unit, it is not sufficient in viewability and resolution of a display surface as compared with a print medium such as a book, but the existing LCD is present. In terms of technology, it is difficult to deny the difficulty of manufacturing and mounting technology.

The present invention is intended to provide a book-type display of a spread display, in which the above-mentioned problems are compensated, the information obtained from a print medium called a book is not impaired, and the book has a portability which is a characteristic of the book.

[0006]

[Purpose] As the flow of mobile terminals, initially the purpose was to make stationary PCs / word processors smaller and lighter so that they could be used while away from home or on the move, but recently, personal information in a new genre different from existing terminals Terminals are appearing. These mainly deal with personal data processing such as address and schedule management, but there are some dedicated terminals targeted for electronic publishing.

In this embodiment, as a display terminal for displaying an electronic publication, which is a medium replacing "paper", it has a function and portability similar to "book" and is a personal information terminal replacing book in the future. The purpose is to provide a real book-type display.

[0008]

An image display device of the present invention has a first display section and a second display section, and the two display sections can be freely opened and closed by a coupling section, which is similar to a two-page spread display book. Image display device. In the image display device of the present invention, an LCD is provided on the display surface of each display unit, and the display surface of the first display unit and the display surface of the second display unit are arranged so as to be in close contact with the coupling unit. The LCD screen can be used as one screen, or each screen can be used as an independent single screen.

In the image display device of the present invention, two L
When the CD screen is used as an independent single screen, the contents of the display data can be displayed vertically or rotated 90 degrees to be horizontally displayed. Similarly, when two LCDs are combined and used as one continuous screen, it is possible to display in portrait orientation or landscape orientation. Further, it is also possible to use only one of the two LCD screens and turn off the rest of the LCD screens for use.

[0010]

According to the image display device of the present invention, by providing two LCDs having a wide display surface, it is possible to perform display corresponding to the spread display of a book, and depending on the type of book and display data, LC
Images can be displayed on the D screen in various modes such as a horizontally long display, a vertically long display, a single screen independent display, or a dual screen integrated display. As a result, the display can be made in accordance with the display data, so that the user can read in a display system that he / she likes, and can display a large amount of data such as magazines in addition to the resolution of the LCD.

Therefore, the display device can be used as a display device replacing a book without a feeling of strangeness, can display electronic media information of several books, and has a display function similar to that of a book.

[0012]

The book type display of the present invention will be described below.

(System Outline) First, an electronic page information distribution system as a background of the present invention will be described.

The electronic paper surface information distribution system is to replace conventional paper printed materials (paper surface information of newspapers, magazines, etc.), convert the paper surface information into electronic information, and distribute it to vending machines installed in stations and the like. Information to be sold and purchased by recording the electronic paper surface information on an electronic recording medium such as an IC card and a magneto-optical disk and displaying the information on a mobile terminal such as a mobile display. production·
It is a system that includes everything from distribution to consumption, and is a system that realizes a so-called paperless society.

With this electronic paper surface information distribution system, it is possible to provide information to consumers at the individual level as "electronic media" in place of paper. Further, it is expected that the use of the book-type display as a display terminal will not only increase the popularity of this system but also create a large-scale new market. If this system is used at each home or individual level and becomes a media alternative to paper,
There is a possibility that the diffusion will accelerate, the market will further develop, and that the number of mobile terminals will be "one for each". Further, with the spread of vending machines, it becomes possible to easily purchase electronic page information at station shops and streets, and it is possible to obtain necessary information anywhere. As the information contained individually, not only newspapers but also text information such as books and magazines can be obtained.

The outline of the system configuration will be described below with reference to FIG. This system is roughly divided into three subsystems of a production system 1, a distribution system 3, and a consumption system 5. The production system 1 is composed of a publisher 10 and an electronic page information producer 20, and the publisher 10 is composed of a newspaper publisher 11, a publisher 13, and a small-scale publisher 15.

In the small-scale publisher 15, the publisher 10 and the electronic page information producer 20 are not differentiated, and the small-scale publisher 15
Inside, there is an electronic paper surface conversion system 25 that performs the same function as the electronic paper surface information producer 20.

The distribution system 3 is composed of an electronic paper information distribution / seller 21 and an intermediary 30. The electronic page information distributor / distributor 30 is composed of a center 32 and a vending machine 40. The center 32 includes a reception system 33, a recording / editing system 34, a transmission system 35, and a management system 36.

The consumer system 3 is composed of general consumers 50 such as commuting to work and commuting to school, and a portable terminal 51 carried by them.

Newspaper page information 12 is provided from the newspaper company 11, and magazine page information 14 is provided from the publisher 13. From small publisher 15, electronic advertisement / town information 2
6 are provided.

Electronic paper manufacturers 21, 23 and center 32
Can be connected by an ISDN line 28, and the small-scale publishing company 15 and the center 32 can be connected by a public telephone line 29.

In this system, first, the electronic page information manufacturer 20 converts the electronic page information in the prescribed format of the system into an electronic newspaper page 22 and an electronic magazine page 24. Further, even the small-scale publishing company 15 is converted into electronic advertisement / town information 26 by the electronic page-forming system 25 provided therein. Then, these are distributed from the center 32 to the vending machine 40 and sold. Here, the target data capacity is considered.

(Analysis of display data) Information contained in newspapers / books as an example of the page data to be handled is roughly divided into two types, that is, "character" information such as headlines, text articles, advertisement articles, and photographs and charts. It is composed of "picture" information such as.
However, if the paper surface information is treated as graphic data, the whole can be expressed as an image. By doing this,
It can handle the same data as image scanners and facsimiles. Table 1 shows the data amount when the paper surface information is treated as an image.

[0024]

[Table 1]

In order to represent information such as comics contained in a book as an image, not only detailed image information but also character information such as a balloon must be represented. However, in order to represent the characters in the balloon, a resolution equivalent to 24 dot corners of a standard printer is required for each character. If each character is expressed by 24 dots square, the size of one character is 3 mm square, and about 8 dots / mm = about 203 dp
The resolution is i (dots / inch), which is a level at which image information can be satisfied. When the resolution of this level is satisfied, the amount of display data is very large, and one page of A4 size has data of horizontal 1,616 dots × vertical 2,368 dots (about 0.5 MB).

(Requirements for Display Device) The following two points can be considered as requirements for the display device.

(1) Resolution: In order to display the page information of newspapers, comics, etc., a resolution of at least 200 dpi of A4 size is required, as described in the previous section, but the book type display will be replaced with a book in the future. Since it is assumed to be a display device, displaying one page of paper on both sides as well as when the reader is reading a book will increase the displayed content and it will be comfortable to read a book. it can. Furthermore, a resolution of 300 dpi to 400 dpi at the maximum is required to recognize even kanji in kanji.

In addition, it is necessary to display marginal character information such as a margin column which is often found in magazines and the like. In order to see these detailed information, the human eye unknowingly repeatedly expands and contracts. It is necessary to add the function of simulating these human movements to the display device so as to transmit the paper surface information to the reader.

In order to transmit the page information to the reader by the display device, it is necessary to have the ability to display at the resolution corresponding to one page of the page described in the previous section, but even if the entire page cannot be displayed. However, at least the desired part of the screen is required to be enlarged or reduced to display the entire sheet so that the resolution can be artificially increased. Because when humans read newspapers, they sometimes read the entire page and read headline articles,
The action of reading one article in a very narrow range is repeated instantly and randomly. Therefore, it is necessary that at least the paper surface of the monochrome binary dot data can be read by enlarging / reducing, scrolling, and selecting a page. As an example showing the resolution of the LCD having the resolution of 640 × 480 dots, taking a case of displaying a comic as an example, the “picture” can be recognized, but it is difficult to read the “speech” in the speech bubble. In order to read the "speech" in the speech balloon, after editing the cartoon picture information, replace only the character information with characters that are easy to read even at low resolution (for example, standardized characters of about 12 dots per character) There is also a need to build a center system such as reworking. Although it is possible to recognize "characters" by this editing work, always performing and displaying this work increases the amount of work on the side of producing electronic page information.

(2) Portability: As the next requirement, it is necessary for the display device to have portability and simplicity such as newspapers and comics. In general books, "easy to read anywhere" is a matter of course, and it is necessary to solve this natural property by reducing the size and weight of the display device. It is necessary as a substitute for a book that it can be carried anywhere, can be used in a small space, and that it does not matter if the weight is actually used.

The data (electronic page information) can be obtained by a recording medium (IC) from a shop at a station, a street, or an electronic page information vending machine that sells this data.
It is necessary that one newspaper or magazine information can be obtained with a memory card or the like) and that it can be recorded on a magneto-optical disk, which is a non-volatile and large-capacity recording medium. The IC memory card also needs to be non-volatile for at least one day (assuming that data can be recorded on the magneto-optical disk, etc.) by attaching a battery. Further, the information recorded on the magneto-optical disk can be selected and retrieved for each book, and a selection and display function for this purpose is also required. This function is a cueing function in which, for example, the first page of a newspaper or magazine that has been recorded appears in sequence when a certain button is pressed. Information on several tens of newspapers and magazines can be recorded on one magneto-optical disk. However, when the capacity is full, it is not possible to record any more, so it is necessary to use the cue function to pull out a newspaper or magazine and press the delete button in that state to delete the book.
However, the delete button must be designed so that it cannot be pressed unexpectedly. A book-type display that meets the above requirements (1) and (2) is used in this embodiment.

(External Appearance, Basic Structure) FIG. 2 shows an external view of the book-type display 51. In addition, it consists of a charger, magneto-optical disk driver (including cable, magneto-optical disk), dry battery box, etc. as options. Since this device is intended for a display terminal that replaces a book, the appearance has specifications equivalent to those of a book, and there is a display surface on both sides when opened.
It is configured by using two LCDs (liquid crystal displays) 54. The image display device 51 has a different shape when used and when carried, and is a spread monitor having LCDs 54 on the left and right when used as in reading a "book".
When carrying, fold the two-page spread when used in the center and carry it in half the size when used. FIG. 3 is a schematic three-view drawing of a book-type display using an STN-type reflective LCD. As another embodiment, FIG. 4 is a schematic three-view drawing of the case where a TFT type LCD 54 that can be closely arranged is used.

The two LCDs 54 are the LCD 1 and the LCD 1, respectively.
LCD2. The left and right display areas should be the same size.
An operation panel is provided on the upper right of the frame 55. Further, the operation panel may be provided on the upper left and right sides of the frame 55. A connecting portion (hinge) 56 is provided in the central portion of the frame 55, as shown in FIG.
Fold it in half in the middle as shown in B. Carry in this bent state.

The basic structure of the book-type display 51 is shown in FIG. This display 51 has a resolution of 640 x 4
The device is provided with two 80-dot LCDs (liquid crystal displays) 54 and has a display area of 80% or more of the total display device 51. The size of the LCD 54 is A5 size, and two A4 sizes can be displayed together. The LCD 54 uses STN type reflective liquid crystal in this embodiment. LCD 54 as shown in FIG.
There is a magnifying lens 58 corresponding to each of the above, and is supported by a mounting portion (lens raising mechanism) 59 that supports this lens. The size of the magnifying lens 58 is LCD
The size is equal to or larger than the size of 54. The magnifying lens 58 is used for the LCD 5 when the display device 51 is opened.
4, a magnifying lens 58 is closely attached to each LCD 54 when the device is bent, and is mounted in the recess 581 so that the device surface becomes flat.

The purpose of this magnifying lens 58 is to provide two LCs.
Frame portion between D54 (portion not displaying image) 55
Is to be eliminated optically to fill the gap between the LCD screens to form one connected screen. For this reason, the edge of the display screen of the LCD is brought closer by enlarging the image display portion.

The magnifying lens 58 (in this embodiment, a Fresnel lens is used) floats up with a gap between each surface of the LCD 54 when the device is opened by the mounting portion 59, and magnifies left and right. The lens 58 has a mechanism in which the inner ends thereof are brought into contact with each other so as to be in a position where the gap between both lenses is eliminated.

With respect to this mechanism, as shown in FIGS. 5 and 6, the mounting portion 59 attached to the end portion of the magnifying lens 58 is moved in the circumferential direction. As a result, the magnifying lens 58 comes into close contact with the respective surfaces of the LCD 54 when the device is folded. Further, when the present apparatus is opened, the mounting portion 59 is moved in the circumferential direction toward the coupling side of the apparatus so that the magnifying lens 58 is lifted from each surface of the LCD 54 and both lenses are brought close to each other. This operation is manually performed by a person. With this, 2
It is also possible to view the screen independently of the LCD 54 without enlarging the screen while the one magnifying lens 58 remains in close contact with the respective surfaces of the two LCDs 54. Further, by providing a spring in the mounting portion 59, the mounting portion 59 can be automatically moved in the circumferential direction when the present apparatus is opened.
It is also possible to make the magnifying lens 58 float.

The function of the magnifying lens 58 will be further described with reference to FIG. As shown in FIG. 6a, the LCD 54
The magnifying lens 58 is arranged so that the optical axes 582 of the two lenses are located at the center of the end of each of the ends of the surface displaying the screen in the spread direction. FIG. 7a shows the relationship between the distance b between the two magnifying lenses 58 and the two LCDs 54 and the focal length f of the lens, and FIG. 7b shows an optical diagram of the above arrangement.

Assuming that the distance between the LCD 54 and the magnifying lens 58 is b, the distance between the magnifying lens 58 and the virtual image 541 of the LCD is a, and the focal length of the magnifying lens 58 is f, the relationship between them is as follows. It is expressed by the equation 1).

(1 / b)-(1 / a) = 1 / f (1)

Then, the length of the LCD 54 is set to L, and LC
If the length of the virtual image 541 of D54 is L ', the distances a and b
And the lengths L and L'are represented by the following equation (2).

L / L '= b / a (2)

Here, the left and right LCDs 54-1, 54-2
Of the virtual images 54-1 and 54-2 are in contact with each other, the focal length f of the magnifying lens 58 and the magnifying lens 58 and L
A combination of the distances a between the CDs 54 is selected. Under this condition, if the distance ΔL between the coupling portion and the LCD end portion (which is half the distance between the two LCDs) is used, L, L
The relation between 'and ΔL is expressed by the following equation (3).

ΔL = L'-L (3)

Here, the smaller the distance b, the thinner the apparatus may be, but the focal length f also becomes smaller. This requires a lens having a large aperture and a short focal length, which is limited due to the circumferential difference and the like.

Therefore, in the magnifying lens, it is necessary that ΔL, L, b, and f satisfy the relationship of the following expression (4).

L / (L + ΔL) = 1− (b / f) (4)

In this way, the enlargement of the screen is performed only in the direction of the connecting portion 5 of the device. The advantage of this method is that the magnification can be reduced and the distance between the LCD and the lens is also reduced.

Next, the structure of the apparatus and the arrangement of parts in the apparatus will be described with reference to FIG. The coupling portion 56 is a hinge, and the wiring to each LCD 54 is passed through. In the book type display, it is necessary to arrange all parts inside the device 51 from the viewpoint of portability. Therefore, the layout of the power supply and the board is also determined.
First, the power source is assumed to be equipped with 14 1.2V batteries 517 according to the calculation of the power consumption of the entire device. As a result, the number of batteries 517 is evenly distributed to the left and right devices. Further, when the apparatus is opened, the component arrangement of the entire apparatus is determined so that the weight distribution on the left and right sides is equalized. In this embodiment, the battery 517, the electronic circuit board 511, the driver 522 for the recording medium, and here the memory card socket are large in weight, and these are mainly considered and arranged in the case. Further, the device 51 includes a SCSI connector 5 as an interface with external equipment.
18 is mounted.

The electronic circuit board 511 includes an SH microcomputer 512, which will be described later, and DICEP 513, PLD 514, D.
A RAM 515 and a VRAM 516 are mounted. The size of the book type display device is determined by the size of the LCD 54, but it is necessary to reduce the size of other parts as much as possible so that the size of the monitor and the size of the entire device are increased only by the operation panel part.

(Image Display Method) Image data is used for display mainly for image display. First, compressed image data is obtained in the recording medium 52 from the electronic information vending machine 40 of the distribution system. Next, the recording medium 52 is inserted into the book-type display, and the data for the LCD display screen in the recording medium 52 is decompressed and transferred to the memory 515. Display screen data of, for example, horizontal 3,232 dots × vertical 4,736 dots corresponding to A4 size 400 dpi with high resolution is stored in the memory (DRAM) 515, and data is transferred according to the display on the LCD 54. For example, if the display screen of the LCD 54 is A5 size 640
With x480 dots, the resolution is 85 dpi and A5
If you compose an A4 size screen with two size LCDs,
The resolution is 60 dpi. Since the resolution of the LCD 54 is this value, the screen is enlarged or reduced and the image information is displayed up to the fineness of 400 dpi data. At this time (when enlarging), the entire image cannot be displayed.

Expansion or reduction is performed by the memory (DRAM) 51.
Data from 5 was extracted directly or by thinning out and
The data corresponding to D54 is stored in the memory (VRAM) 516 that stores only the data for display, and the data is displayed. The screen is made rough by directly displaying the finest display and by thinning out the screen in other cases, and displays the entire screen in the range of 640 × 480 dots, for example. When thinning and using data of horizontal 3,232 dots x vertical 4,736 dots corresponding to A4 size 400 dpi, both horizontal and vertical are thinned to 1/8 (only one is displayed in 8 dots) and horizontal 404 dots x vertical 592 It becomes a dot, and 640 x 480 dots fit in one screen. At this time, the enlargement ratio can be up to 8 times assuming that one page of A4 size is displayed on one LCD in the most reduced state. In addition, both horizontal and vertical are thinned to 1/4 (only one is displayed in 4 dots) and horizontal 808 dots × vertical 118
It becomes 4 dots, which is almost in the 640 × (480 × 2) dots of 2 screens. At this time, the enlargement ratio can be up to 4 times as the A4 / 1 page is almost displayed on the two LCDs in the most reduced state (the multiplied portion is moved by moving the screen vertically and horizontally).

As described above, the expansion ratio and the data memory (VRA) corresponding to the expansion ratio are
M) Determine the amount stored in 516. When expanding,
It is necessary to provide a point on the display screen, for example, a reference location for enlarging the display center. When the screen is reduced, it is sufficient to add the surrounding area around the displayed screen to the display, so that it is not necessary to provide a reference point.
Since enlargement and reduction can be performed both when two LCDs are used independently and when two LCDs are used as one screen, it is necessary to change the reference point setting for both. When using two LCDs independently, LCD54-1, LCD5
It is performed after selecting which one of 4-2 is to be enlarged. When using two LCDs as one screen, the enlargement is performed after selecting whether the reference point to be enlarged is left or right. In the present embodiment, the reference point for enlargement is the center of the image, but it may be four corners, and the reference point is provided at one point on the screen. When the data is always displayed in the center of the screen on the display screen and there is a blank part where the data is not displayed, the center of the image is always on the display screen, and the part where the data is not displayed appears on all four sides.

(Screen Color) In this example, a monochrome display was used for the two LCDs. Depending on the content of the display data, a color display may be more suitable, so a color display is used in another embodiment.
Also, one side of the two screens may be monochrome and the other side may be color. In any case, the display should be selected in consideration of the cost and the like.

(Image Data Format) The image data format in the recording medium used in this display device will be described below. First, the recording medium stores image data in a hierarchical form of title classification, content classification, and actual data on each page of the book.

The data on the paper is stored in a compressed form. In this embodiment, the compression method is the MMR method. Then, after decompressing the data contained in the recording medium, the data for one page of A4 size 400 dpi is transferred to the memory (DRAM) 515. In this embodiment, this A4
The standard of 400 dpi is decided by the paper surface data distribution system, but the format of the data should be decided according to the resolution and specifications of the future LCD resolution improvement or other small and low resolution display devices, and the system should be adapted to it. Is also possible. Further, in the present embodiment, the A4 format vertical data format is used as the standard, but conversely, a horizontal format may be used. The capacity of the memory (DRAM) 515 is 400 dpi for A4 size and 2 Mbytes for one page, but if a display device for expanding the capacity for two pages on the memory is used, the capacity can be increased to 4 Mbytes. Further, if the resolution of the data format is lowered to, for example, a fax size of A4 size 200 dpi, four pages of data can be held without increasing the capacity from 2 Mbytes. This means that the contents of four pages of the original paper are originally included in one page in the A4 size 400 dpi portrait data format of the present embodiment (for example, 4 pages of A4 size are arranged vertically and horizontally 2 × 2 and reduced to 1 page of A4 size). And set this to 4
It is the same as digitizing with a data format of 00 dpi).

As an intermediate point, it is possible to handle data of two pages of A5 size as described below.
Since the display device can also display the LCD 54-1 and the LCD 54-2 independently or together, the raw paper data (A5) is divided and displayed corresponding to each LCD. At this time, the A5 image of the base paper becomes horizontally long. Also, since the A4 size portrait base paper is reduced to A5 size, the image is in a horizontal direction here. Therefore, it is necessary to restore the original display by performing processing such as screen rotation.

As described above, A4 size 1 page, A5 size 2
Three types of formats are created: page and 4 pages of A6 size. In addition, the direction of the page, A5 size 2 pages, A6
Additional information such as page breaks is also attached to the four size pages, and these pieces of information are added as a header before the data on the paper.

(Recording medium and data compression method) In the embodiment, a memory card is used as a recording medium for image data. Memory cards are considered to be the smallest and lightest, including drivers, and are suitable for this specification. But,
If the image data of newspapers, comics, etc. is left as it is, for example, the morning edition (about 40 pages) has a huge data amount of about 80 MB, and it is necessary to compress the data. Among the many data compression methods, MMR (Mo
dified Modified Relative element address desi
gnate) 3) is adopted. The MMR method has a compression ratio of about 1 /
This is because it is used for electronic publishing by CD-ROM with a value of 10 or less and is technically reliable. The magneto-optical disk is used as a storage recording medium to store a large amount of data.

(Screen display control) A4 size 400 recording medium
Vertical format of dpi, A4 size 1 page,
Digitize images for 2 pages of A5 size and 4 pages of A6 size,
Screen control in the case of displaying all or a part of this on two LCDs is shown in the following items (1) to (3) with reference to FIG.

The basics of screen control are as follows. (a) Image (A4 size 400 dpi portrait data format): A4 size 1 page display, A5 size 2 page display, A6 size 4 page display.

(B) Display screen selection: Two LCDs display one page, two LCDs display two pages continuously, and two LCDs display independently.

(C) Display direction selection (direction: up, down, left and right): Two LCDs are independent, and two LCDs work together.

(1) A4 size 1 page A4 size 400 dpi vertically long data format on a recording medium, and the data for 1 page of A4 size is digitized as a vertically oriented image, the screen control will be described below. There are the following methods for displaying the data (all or part) transferred from the recording medium to the memory (DRAM) on the two LCDs. (See FIG. 10) Two LCDs are displayed as one screen. The display direction is upward, downward, rightward, or leftward with respect to the display device. One of the left and right LCDs is displayed as one screen. The display direction is upward, downward, rightward, or leftward with respect to the display device.

(2) Two pages of A5 size. The screen control will be described below in the case where the recording medium is digitized into an A4 size 400 dpi vertically long data format with an image in which two pages of A5 size data are arranged sideways. There are the following methods for displaying the data (all or part) transferred from the recording medium to the memory (DRAM) on the two LCDs.

With the two LCDs as one screen, A5
Select and display one of the left and right sides of the format screen. The display direction is upward, downward, rightward, with respect to the display device.
There is a leftward direction. (See Figures 11-12)

Each A5 size screen is displayed on the left and right LCDs,
indicate. When two A5 size pages are arranged side by side and digitized, the right A5 size screen is displayed on the right LCD and the left A5 size screen is displayed.
Display the format screen on the left LCD. The display direction is each LCD
Images are independently directed to the display device in the upward, downward, rightward, and leftward directions. (See Figures 13-14)

On the left and right LCDs, one A5 size screen,
indicate. When two A5 size pages are arranged side by side and digitized, the right A5 size screen is displayed on the left LCD and the left A5 size screen is displayed.
Display the format screen on the right LCD. The display direction is each LCD
Images are independently directed to the display device in the upward, downward, rightward, and leftward directions. (See Figures 13-14)

(3) 4 pages of A6 size A4 size 400 dpi vertically long data format on a recording medium, and data of 4 pages of A6 size vertically and horizontally 2 × 2
The screen control is shown below in the case where the images are digitized and arranged electronically. There are the following methods for displaying the data (all or part) transferred from the recording medium to the memory (DRAM) on the two LCDs.

With two LCDs as one screen, A6
Select and display one of the four screens. The display direction is upward, downward, rightward, or leftward with respect to the display device. (See Fig. 15)

Two A6 size screens are displayed on the left and right LCDs. Vertically and horizontally 2 x 2 data for 4 pages of A6 size
When it is digitized by arranging it on the screen, select two A6 size screens that are lined up horizontally on the upper side or the lower side, and change the screen on the right side to the LC on the right side.
The left A5 size screen is displayed on D on the left LCD. As for the display direction, the image of each LCD is independent, and there are upward, downward, rightward, and leftward directions with respect to the display device. (Fig. 16
reference)

Two A6 size screens are displayed on the left and right LCDs. Vertically and horizontally 2 x 2 data for 4 pages of A6 size
When arranged side by side and digitized, two A6 screens are arbitrarily selected and displayed on the left and right LCDs. Display direction is for each LC
The images of D are independently directed to the display device in the upward, downward, rightward, and leftward directions. (See Fig. 16)

As another embodiment, please refer to FIG. 17 as a display when the data format of one page of A4 size is stored in two memories. Further, when displaying the display contents in two data formats of 0.5 pages of A4 size, refer to FIG.

(Enlargement / Reduction) The following enlargement functions will be shown in (1) to (5) below with reference to FIG. The enlargement function works similarly for both vertical and horizontal display.

(1) One page display: When only one page is displayed with two LCDs as one screen, the entire display screen is enlarged or reduced. The part that cannot be displayed due to enlargement can be displayed by moving the screen (in the enlarged state).

(2) Consider the subsequent two pages as one image: When two pages of two LCDs and a continuous page are displayed, if the location of the first page is enlarged or reduced, two pages are displayed. The data is regarded as one and both pages are enlarged at the same time. For example, a portion that cannot be displayed due to enlargement, such as a left page (which is also enlarged) when the right page is enlarged, can be displayed by moving the screen (in the enlarged state).

(3) Two-page independent: When two pages are displayed, only the page displayed on one LCD is enlarged, and the page displayed on the other LCD is displayed as it is. Display. You can choose which screen to enlarge. A portion of the enlarged LCD screen that cannot be displayed due to enlargement can be displayed by moving the screen (in the enlarged state).

(4) Considering two LCDs as one, the pages are independent: when two pages are displayed, only one page displayed on one LCD is displayed on one screen by two LCDs using the other LCD. Enlarge and display. The page displayed on one LCD disappears. You can choose which screen to enlarge. On the enlarged LCD screen,
The part that cannot be displayed due to enlargement can be displayed by moving the screen (in the enlarged state).

(5) Whole on one side, enlarged on one side: LCD2
When two pages are displayed on the screen, when one LCD (for example, right) is enlarged, the other (left) erases the screen that has been displayed until then and before the right LCD is enlarged. Is displayed. Or display the entire page. ) Also, by displaying the center of the enlarged portion (or other specified point) here, it is possible to determine where the enlarged portion is. This function can also be used when one page is displayed as one screen on two LCDs, and at this time, the above-described two-screen state is changed from the one-screen state on the two LCDs so far. (See Figures 20-21)

(Enlargement Reference Point) Setting of the enlargement reference point will be described below with reference to FIG. LCD 54-1,
Nine reference points are provided on each screen for enlarging the LCD 54-2. It expands and contracts around the reference point. By setting nine locations, it is possible to enlarge the entire display screen. LCD5 as a reference point selection
4-1 or LCD 54-2, select either screen,
The positions 1 to 9 of the reference points provided on each screen are selected by scrolling and set. In addition, when the single screen is displayed on two LCD screens,
The reference points up to 18 are selected, or when both screens are displayed, the reference points are set so as to be provided at nine places on the entire two screens. When one of the two LCD screens is used exclusively for enlarged display and the other screen is used for data display before enlargement, nine reference points are provided on the display screen before enlargement.

As another embodiment, a transparent film for detecting the position of the screen when the screen is touched with a finger, a pen or the like (electric resistance from both ends of the screen to the touched point is measured, and the position is detected from the ratio. There is already one), and the position is detected, and the point is enlarged as the center. (See Figure 22)

(Layer of electronic paper data) It has a function that can use two memory media such as an IC memory card and a magneto-optical disk. Several documents are recorded on the magneto-optical disk,
The data of one document stored is transferred to the IC memory card, and the data in the IC memory card is used for the display in the document for one document.

The inside of one book is hierarchized into chapters, pages, and pages. The page has a vertically long data format of A4 size 400 dpi, for example, horizontal 3,232 dots × vertical 4,7.
It is data of 36 dots (about 2 Mbytes). A chapter is a unit in which a plurality of pages are collected, and a break is determined based on the content of the document. A page is a sheet of paper to be put inside the page, and in some cases, the page may be one A4 size page, two A5 size pages, or four A6 size pages.

(Startup) The LCD 5 is used to start the display screen.
4-1 and the power source of LCD 54-2 are provided independently. In this embodiment, the LCD 54-1 is turned on to turn on the LCD 54-
It is also possible to turn off the power supply of 2. In addition, the LCD 54-1,
Turn on the power of LCD 54-2 to display double-sided display 1
A screen display mode and a mode for performing a double-sided LCD display and an independent screen display are provided. Furthermore, LCD 54-1, L
It is also possible to display only one side of the CD 54-2 and turn off the power supply for one side. The display screen can be displayed vertically or horizontally in any mode. A flow chart of screen activation is shown in FIG. The same applies to the flow chart of screen activation immediately after power-on or when reset is input.

Data reading, recording, and erasing operations in units of one volume for a magneto-optical disk, and pages and chapters in one volume for an IC memory card (update)
I do. In the operation (update) for reading pages / chapter in one volume to the IC memory card, the displayed page is updated, and the chapter including the displayed page is changed to the previous / next chapter. There is a chapter update that updates and displays the first page.

When an IC memory card on which a document is recorded is newly installed and the page update or chapter update button is pressed immediately after that, the first page of the first chapter of the IC memory card is displayed in a reduced screen. It

(Page Update) A method of displaying the data transferred from the recording medium to the memory and updating the page will be described with reference to FIGS. For the following operations,
The operation buttons described in the next section are provided on this display device.

Page turning (including return): Two L's
When the two pages following the CD are displayed, the screens displayed on both sides are replaced with different data on both sides by the operation of turning the pages. For example, when 2 or 3 pages are displayed, 4 or 5 pages are displayed. The reverse is also done.

Page advance (including advance): When two pages following two LCDs are displayed, only the first page disappears from the display and the next page moves to where it was originally displayed. In addition, the next page is newly displayed. For example, when 2 or 3 pages are displayed, 3 or 4 pages are displayed. The reverse is also done.

1LCD 1 screen page advance (including advance): When two LCDs are independently displayed,
All the data displayed on only the selected LCD page is rewritten, and the next page is newly displayed. For example, when two or three pages are displayed and the LCD displaying two pages is selected, the second page is changed to three pages and the display of one of the three pages remains unchanged. The same applies to the page suspension.

2LCD 1 screen page advance (including advance): When two LCDs are displayed as one screen, all the data displaying one screen connected to both sides are rewritten and the same 1 is displayed. The screen display is also displayed on the next page.

(Edit 1) Using the record / playback buttons on the operation panel, the two IC memory card sockets are used as driver A and driver B, and only the desired data in the IC memory card of driver A (or B) is selected. Can be edited by recording in the IC memory card of the driver B (or A). At this time, driver A,
The LCD 54-1 and the LCD 54-2 are displayed corresponding to B.

For example, the IC memory card containing the original recording data is inserted into the driver A, and the IC memory card of the other party for data transfer is inserted into the driver B. By displaying certain data in the IC memory card attached to the driver A on the LCD corresponding to the driver A, which data is to be transferred to the driver B is selected.
The page or chapter (which is set) containing the displayed screen is the selected data. Further, some data in the transfer destination IC memory card contained in the driver B is displayed on the LCD corresponding to the driver B, and the transfer destination is selected. The data in the IC memory card of the driver B is overwritten from the page or chapter (which is set) including this displayed screen. Alternatively, it may be overwritten from the page including this displayed screen or from the next of the chapter. Since the amount of data in a chapter is not constant, the last overwriting may be in the middle of a certain chapter in the IC memory card of driver B. At this time, the data of the next chapter is erased by overwriting the first one. , Will be saved only from the middle.

In the above, LC corresponding to the drivers A and B is used.
D54-1, LCD 54-2 was displayed, but LCD
Data can be transferred by combining 54-1 and LCD 54-2 into one screen. First, the driver A is displayed and the data to be transferred to the driver B is selected. Next, the data in the driver B is displayed on one screen including the LCDs 1 and 2, and the transfer destination is selected. This allows newspapers, L
It is easy to edit the data on the paper with fine characters on a large screen that is difficult to display with CDs 1 and 2 alone. In this way, the drivers A and B are used both when using each LCD independently and when using two screens as one screen.
Is supported.

(Editing 2) An editing method when a magneto-optical disk is used as the recording medium of this embodiment will be described.
An IC memory card is mounted on the IC memory card driver of the display device main body, and the driver for the magneto-optical disk is connected to the interface of the display device. SCSI-2 is adopted as the driver interface of this device.

(1) Data transfer from the magneto-optical disk to the IC memory card: In the operation of reading data in units of one volume from the magneto-optical disk, the volume (one document) containing the displayed page is There is a book update that updates one book before and after the order arranged in the magneto-optical disk and displays the first page and the like. Since the displayed book is transferred to the IC memory card, the previous data on the IC memory card is overwritten and erased. When data is stored in the magneto-optical disk, the original magneto-optical disk is first attached to the magneto-optical disk driver, and the data is transferred from the magneto-optical disk to the IC memory card.
If you want to transfer the data on the magneto-optical disk to another magneto-optical disk, transfer the data from the magneto-optical disk containing the data to the IC memory card, and then remove the magneto-optical disk contained in the driver. Replace with the magneto-optical disk you want to put the data in. Then, the data stored in the IC memory card is transferred to the magneto-optical disk. At this time, only the capacity of the IC memory card can be transferred, so when it is desired to transfer more than the capacity, the transfer is divided into several times.

(2) Data transfer from IC memory card to magneto-optical disk: One book on the IC memory card being displayed can be recorded on the magneto-optical disk one by one at the end of the order of already arranged documents. . When the IC memory card has original data, a magneto-optical disk driver is connected to transfer the data from the IC memory card to the magneto-optical disk. However, when recording is not possible due to the magneto-optical disk side, for example, due to insufficient capacity, the red LED on the operation panel lights up to display. When recording is possible, the green LED lights up. Display unnecessary data (books) in the magneto-optical disk,
By pressing the delete button, you can delete each book.

Further, as another embodiment, the display device is
A case where only one C memory card driver is provided will be described. At this time, when it is desired to transfer the data of one IC memory card to another IC memory card, after transferring the data to the magneto-optical disk, the data mounted on the IC memory card drive provided in the display device main body is transferred. Replace the IC memory card of with the IC memory card where you want to put the data. After that, the data is transferred from the magneto-optical disk to the IC memory card.

(Operation Button) As shown in FIGS. 26 to 28, a power button, a screen drive button corresponding to each of the LCD 54-1 and LCD 54-2, a previous item button 70 as a page turning function, a next item button 69, and a vertical display. , A horizontal display selection button, an enlargement button 67, a reduction button 38, a menu button for displaying data contents, a bookmark button 62 for storing the last displayed page, and a scroll button 80 for selecting up, down, left or right.

Further, a record button 79 and a play button 6
0, an enlargement button 67, a reduction button 68, a button 80 indicating up, down, left, and right directions corresponding to scrolling, a page-turning previous button 70, and a next-section button 69 are main. Further, there is a button 62 as a bookmark function, which has a button for storing the last read page and displaying the same page when the power is turned on again. It has a power button, a reset button, and a volume for adjusting the contrast. The record / playback button is the main function of this display device, and like the radio-cassette, the two recording medium sockets are the drive A and drive B, and the LCD 54-1 and LCD 54-2 display corresponding to each drive. You can also

(Basic Structure) The structure of the book-type display will be described below. This device used two liquid crystal modules assuming a book type shape. Also, LCD
(Liquid crystal display) Each uses a LCD timing controller to display.

FIG. 29 shows a basic block diagram of the control device. The configuration of the device is divided into two parts, a display part of LCD 54-1 and LCD 54-2, and an electronic circuit part. The main components of the electronic circuit unit are image data, VRAM circuit unit 516 for outputting to the LCD, recording medium unit 522 for inputting paper surface data, and temporarily holding paper surface data input from the recording medium 52. A DRAM circuit section 515 of the memory, a compression / expansion section 513 for compressing / expanding the page space data, a microcomputer section 512 for processing the data, an LCD controller circuit section 515 for timing the data transfer to the LCD,
Display device operation (image enlargement / reduction, page turning, etc.)
It is composed of an operation unit 519 for controlling the.
LC that receives and displays data from these circuits
Two D54 are provided. To reduce the number of parts, use gates such as timing circuits as much as possible with PLD (Pro
gramable device) 514.

(LCD) In this embodiment, a monochrome STN reflection type LCD is used in consideration of cost. STN type (Super Twisted Nem)
atic) and TFT type (Thin Film Transistor), but there is a 2-3 times difference in cost at this stage. Considering the product of this development with the concept of "one for one person", the price problem is very important, so in this embodiment, the monochrome STN reflective type with a low unit price was adopted. In the future, other types such as color type and TFT type can be adopted.

The interface between the LCD and the electronic circuit section is L
These are the data to the CD and the timing signal.

(Electronic Circuit Section) The details of the electronic circuit section will be described below. A DRAM circuit unit 515 that holds image data on the paper surface, and a VRAM circuit unit 516 that outputs the image data to the LCD
Then, the LCD timing controller circuit unit 515 that outputs data to the LCD will be described in detail. A block diagram of the electronic circuit configuration is shown in FIG.

(DRAM circuit) One page (2 Mbytes) of paper data contained in the recording medium is compressed / expanded by the compression / expansion circuit 5.
The original data is restored in 13 and the DRAM (Dynamic
RAM) memory 515 holds. In another embodiment,
Holds 2 pages (4M bytes) of data in the memory and 2
Data corresponding to the screen independent display operation may be held in some cases. Since the LCD 54 of 640 × 480 dots is used for display, this data is thinned out and displayed. FIG. 31 shows a data array when temporarily storing binary data obtained by expanding image data in the DRAM.

The compression and decompression of the MMR is performed by hardware in this embodiment. It is possible to improve the operation speed by using hardware rather than software. In this embodiment, compression / expansion hardware 513 is used.
An MMR compression / expansion chip called DICEP-E1 is used as

(VRAM Circuit) The VRAM circuit 516 is
It has a function of temporarily recording the paper image data from the DRAM memory 515 after performing thinning and array conversion in accordance with the display mode, and then outputting it to the LCD timing controller 514. VRAM (Video which was adopted this time
RAM) 516 is a SAM of 256 k words x 8 bits
It is a 2 Mbit multi-port video RAM composed of a (Serial Access Memory) unit. VRAM 516 is each L
It is provided corresponding to the CD. The data capacity of one screen is the display capacity of the LCD 640 × 480 dots = 300 kbits, and data for several screens can be stored.

Since the RAM section and the SAM section can operate independently and asynchronously, the CPU of the microcomputer section can access the RAM regardless of the bidirectional data transfer between the RAM and the SAM. Paper surface image data is sent from the VRAM serial port to the LCD timing controller 514. From the above, the VRAM circuit 516 performs the RAS according to the peripheral circuit for reading / writing from the CPU and the memory access request arbiter.
And a circuit for measuring CAS timing, an address multiplex circuit, an address decoder circuit and the like.

(LCD timing controller circuit) L
CD timing controller 514 is VRAM on LCD
It has a function of outputting and displaying data from 516.
LCTC (LCD Timing Controller IC) is VRAM51
The paper image data output from 6 is received by a 16-bit serial input, and the data is transmitted at an 8-bit output in synchronization with a signal for driving the LCD. Therefore VR
An LCD timing control circuit is provided to match the data output timing from the AM with the data output timing from the LCD timing controller to the LCD. In addition, this circuit detects the timing at which the LCD timing controller starts fetching data. Two LCTCs are provided corresponding to the two LCDs.

(Data Arrangement) Next, a method for rearranging and displaying the data from the DRAM 515 by software will be described. DRAM, VRAM, L
The data arrangement on the CD can be performed by the method shown in FIGS. First, a DRAM is used in the data format of A4 size 1 page portrait / 400 dpi which is the standard in this embodiment.
When data is taken in, the earlier page of the imported data is displayed on the right side of the LCD, so that the previous page comes to the upper half of the A4 vertical portrait at the data holding of the first recording medium. To do. Basically, when inputting data to the DRAM, the data of the previous page is always put in the upper half when the A4 size is vertical, and the right half is input when the A4 size is horizontal.

According to this input method, even if the data is increased or the format is changed, the data can be taken into the DRAM as shown in FIG.
Use an input method close to the basic one, such as 1, so that it comes to the right half of the LCD. For example, when the A4 size vertical and two pages of data are taken into the DRAM, the earlier page data is thinned out to a capacity of 640 × 480 which is the upper half data of the DRAM and transferred to the LCD. Similarly, for the remaining pages, data is thinned out to 640 × 480 and transferred. Here, depending on the display mode on the LCD, the DRA
The data array from M to VRAM is determined.

When the DRAM 515 is loaded with data in the standard format and the LCD 54 is in the standard mode (display of continuous two-sided pages), the VRAM 516 is displayed on the LCD.
The VRAM 5 is divided into two corresponding to 54.
The earlier one of the 16 addresses corresponds to the right screen of the LCD 54, and the later one corresponds to the left screen. The VRAM memory is the LCD 54
-1, and divided into two corresponding to the LCD 54-2.

When there is one display page in the (A4 size portrait, 1 page) format, the VRAM 5
As an array of the data to be taken in earlier in the 16 addresses, the data is arrayed so that the data in the first column above the display data of the DRAM 515 is at the head of the column address. The array conversion to the VRAM is determined depending on where the display data array of the DRAM 515 is arranged on the left, right, top, bottom or the reference, and therefore, in the reference data format, the data is loaded into the DRAM as shown in FIG.

When the LCD 54 is to be displayed vertically on one screen, the page data to be displayed in the DRAM 515 is transferred to the top address of the VRAM 516 in the order of address. At this time, in order to display one page of data on two LCD screens, the DRAM display data is divided into two by the address and transferred.

When two display pages are included in the (A4 size portrait, 2 pages) format, the VRAM 51
As an array of data to be taken in at an earlier address of 6, the data is arranged so that the data of the upper first line of one page of display data of the DRAM 515 is at the head of the row address. The array conversion to the VRAM is determined depending on where the display data array of the DRAM 515 is arranged on the left, right, up, and down with reference to it. Therefore, in the reference data format, data is loaded into the DRAM 515 as shown in FIGS.

When the LCD display screen is displayed on two horizontally long pages, the data to be displayed from the DRAM 515 is divided into two addresses, and the leading address data is LC.
The data is transferred to the right screen of D and the head data of the divided address is transferred to the left screen of the LCD. LC when transferring
VRAM5 by thinning out 640 for one row of D display data
Transfer to 16 addresses.

When the LCD is displayed horizontally on one screen, D
The page data to be displayed in the RAM 515 is transferred to the start address of the VRAM 516 in the order of addresses.
To display one page of data on two LCD screens, D
The RAM display data is divided into two by address and transferred. To display a vertically long screen on the LCD, use DRAM
The data of one column 515 is transferred to one row of the VRAM 516. At this time, data is divided into half columns of the display data of the DRAM 515 and transferred to each of the VRAMs 516. According to the number of dots displayed on the LCD during transfer,
Thin out the data.

(A4 size portrait, 4 pages) When four display pages are included in the format, the VRAM 51
As an array of data to be taken into the address of 6, the first, 4 pages of display data of the DRAM 515 are divided into two by the address, and the head address is further divided into two by the column. The final column data of the first row is VRAM516
Arrange the data so that it is at the beginning of the row address of. Since the array conversion to the VRAM 516 is determined depending on whether the array of display data of the DRAM 515 is arranged on the left, right, top, bottom, or the reference, the reference data format shown in FIG.
Data is taken into the DRAM as shown in 5 to 16. In addition, the LCD display screen is displayed in two horizontally long pages, and the LCD is
When the screen is displayed horizontally, the data is transferred in the same manner as described above.

As a data thinning method, the logical sum of adjacent data is taken, and binary data (black) and (white) data (black) are preferentially fetched. This is performed for both rows and columns, and the logical sum of rows and columns is combined for each display mode. For example, in the whole display, the logical sum of the original data is calculated for both the row and the column, and the data is thinned and displayed based on the intersection of the heads of the row address and the column address. When the data exceeds the number of display dots on the LCD, the number of data closest to the number of display dots on the LCD is thinned out and the rest is discarded. On the contrary, if the number is small, (white) data is inserted and displayed.

(Software) This display device basically performs a specific operation in response to the push of the button shown in FIGS. The buttons shown in FIG. 26 are listed and described below. Buttons on the panel are shown in parentheses. The processing flow is shown in FIGS.

(Screen display mode) As a screen display mode, a two-screen independent display mode (A and B screens of the left and right LCDs are independently displayed. Drivers A51 and B are displayed on the A screen.
The data of the driver B52 is displayed on the 52nd screen. ),
There are two modes of two-screen integrated display (displaying A and B screens of the left and right LCDs as one screen).

(Movement immediately after turning on the power) Immediately after turning on the power, the first page of the driver A71 is displayed on both LCDs A and B. If the data format in the IC memory card is one page of A4 size, one page is displayed horizontally on the display device using two screens. If there are two pages of A5 size, one page is displayed on the left and right LCDs. If there are four pages of A6 size, the above two screens are displayed on the left and right LCDs one page at a time. There is no change even when the play button A is pressed.

(1) Screen A, Screen B (A, B): Screen A
Screen A (open right screen) is selected by pressing button 76, and screen B (left screen) is selected by pressing screen B button 77.

(2) Driver C (C): The driver C (for magneto-optical disk) is selected by pressing the driver C button 78.

(3) Reproduction (Re60A, Re60B): IC
Instruct to display the first page of the documents stored in the memory card. The reproduction button of the reproduction 60A (60B) is used to read from the IC memory card of the driver A71 (B52).

.. Screen button A76, screen button B77
When the play button 60A (60B) is pressed without pressing, the first page of the driver A71 (B72) is displayed on both LCDs A and B (two-screen integrated display).

.. When the play button 60A (60B) is pressed after pressing the screen button A76 (B), LCDA (B)
The first page of driver A71 (B72) is displayed in (2
Screen independent display). First, when the two screens are integrally displayed and the two screens are independently displayed, the original display screen is reduced and displayed on the LCDB (A).

'When the playback button 60A (60B) is pressed after pressing the screen button A76 (B), LCDA (B)
The first page of the driver B72 is displayed at (2 screens independent display). Initially, when the two-screen independent display is performed and the two-screen independent display is performed, LCDB (A) is originally LCDA.
The screen displayed in (B) is displayed. First, when the two screens are integrally displayed and the two screens are independently displayed, the original display screen is reduced and displayed on the LCDB (A).

Either of the methods may be used for ",", but which is selected is decided from the beginning.

When the play button 60B is pressed after the screen button C78 is pressed, the data of the first volume of the magneto-optical disk (driver C) is transferred to the IC memory card of the driver B72, and the data of the driver B72 is transferred. Display the first page of one book on LCDB. However, play button 6
When 0A is pressed, the pressing of the screen C button 78 is ignored, and the first page in the driver A71 is displayed on the LCDA.

(4) Recording (Recording): When both the recording button 79 and the reproduction button 60A are pressed at the same time, the page displayed on LCDA is overwritten next to the page displayed on LCDB of drive B72 and copied. To be done.

When the chapter button 63A or the book button 64 is pressed immediately before pressing both the record button 79 and the play button 60A at the same time, the chapter or book including the page displayed on the LCDA is displayed on the LCDB of the drive B72. The page is overwritten and copied.

When the record button 79 is pressed, the driver A7
The first page of No. 1 is simultaneously displayed on the LCDA, and the first page of the driver B72 is simultaneously displayed on the LCDB.

(5) Erase (erase): When both the erase button 61 and the reproduction button 60B are pressed at the same time, the page displayed on the LCDB is erased from the magneto-optical disk of the drive C.

Immediately before pressing both the erase button 61 and the playback button 60B at the same time, if the chapter button 63B or the book button 64 is pressed and the screen button C is pressed, the chapter or book including the page displayed on the LCDB is turned on. Erase from magnetic disk.

(6) Previous Page, Next Page (Previous, Next): Previous (Next) Page Buttons 70A, 70B, Next Page Button 6
Pressing 9A or 69B displays the previous (next) page. Use the previous and next buttons A (B) to drive A71 (B72)
This is done for the data on the IC memory card.

(7) Book (Book): Press the book button 64 to sequentially display the first page of the book. Press the book button 64 to press the previous (next) page button 70 (6
Press 9) to display the previous (next) page. The record button 79 and the erase button 61 are used to specify a book.

(8) Chapter (Chapter A, Chapter B): Press Chapter 63A (63B) to drive the driver A71 (B7).
The first page of the chapter is sequentially displayed for the data of the IC memory card in 2). When you press the chapter 63A (63B) and then the previous (next) A (B) page button (70A (69A)), the driver A71
Display the previous (next) page for the data in the IC memory card (B, 71). Specify the chapter with the record button and delete button.

(9) Rotation (times): Each time the rotation button 65 is pressed, the screen is rotated clockwise by 90 °.

(10) Double-sided (both A, both B): When two-screen integrated display is performed, when the double-sided button 66A (66B) is pressed, it is displayed on the LCDA (B). One displays nothing. Double-sided button 66A when displaying two images independently
Press (66B) to display the LCDA (B) screen
Display the CD as one screen.

(11) Enlargement (enlargement A, enlargement B): When the two-screen integrated display is performed, when the enlargement button 67A (67B) is pressed, nine enlargement reference points for LCDA and B (total 18) Is displayed. Cursor 80
When one of the enlargement reference points is selected with A (80B) and the enlargement button 67A (67B) is then pressed, the LCDs A and B are enlarged to double and displayed as one screen.

When the two-screen independent display is performed, when the enlargement button 67A (67B) is pressed, the LCDA
The nine enlarged reference points of (B) are displayed. The other L
CD is unchanged. Select one of the enlargement reference points with the cursor 80A (80B) and then the enlargement button 67A (67B)
When is pressed, the image on the LCD A (B) screen is enlarged by a factor of 2 and displayed. If the user wants to enlarge again, if the enlargement reference point is the same, the enlargement button 67A (67B) is pressed twice. (The selection of the enlarged reference point can be omitted.)

(12) Reduction (reduction A, reduction B): When two screens are displayed in one-piece display, pressing the reduction button 68A (68B) causes the portion currently displayed to be the center of the screen and LCDA , B as one screen,
It is displayed reduced by half. When it is desired to reduce the size again, if the same enlargement reference point is used, the reduce button 68A (68B) is pressed.
If the data displayed on the LCD is smaller than the number of dots on the LCD on the smallest screen, and there is an internal part of the data on the LCD, that part should be displayed uniformly in black or white (or information such as the document name). May be displayed). This part is provided evenly above and below the display device, but the left and right parts are not provided with the parts facing the hinges, but only vice versa. As a result, the screens displayed on the two LCDs are connected and displayed.

When the two screens independent display is performed, when the reduction 68A (68B) is pressed, a half reduction display is made in the screen of LCDA (B) with the part that has been displayed so far being the center of the screen. To be done. LCD with the smallest screen
If the data to be displayed is smaller than the number of dots and there is an internal part of the data on the LCD, that part should be displayed uniformly in black or white (or information such as the document name may be displayed). . This portion is evenly provided in the vertical and horizontal directions with respect to the display device. As a result, the screens displayed on the two LCDs are independently displayed.

(13) Bookmark: The power button 81 is turned off after pressing the bookmark button 62, and when it is turned on thereafter, the screen immediately before turning off is displayed.

(14) Cursor (cursor 80A, cursor 80B): When the two-screen integrated display is performed, the cursor 8
At 0A (80B), both screens are moved vertically and horizontally. When the two screens are displayed independently, the cursor 8
The LCDA (B) is moved vertically and horizontally at 0A (80B). Select the enlargement reference point.

(Communication function) As an additional function of the display device to the driver B72, functions such as a FAX modem, a telephone function, and a GPS receiver can be added in the form of a card by the PCMCIA standard or the like. It is also possible to combine the paper surface information and the additional information by inserting them into the driver B 72 and inserting the paper surface information such as map information in the driver B 71 into the driver A 71 if the driver B is a GPS receiver. In addition, a dedicated driver D for these communication functions
It is also possible to provide.

[0148]

According to the image display device of the present invention, since two LCDs having a wide display surface are provided, it is possible to display an image corresponding to the two-page spread display of the book. Depending on the data, the LCD screen can be displayed in various ways such as a landscape display, a portrait display, a single screen independent display, or a dual screen integrated display. As a result, the display can be made in accordance with the display data, so that the user can read in a display system that he / she likes, and can display a large amount of data such as magazines in addition to the resolution of the LCD.

Therefore, it can be used as an image display device replacing a book without a feeling of discomfort, and electronic media information of several books can be displayed by exchanging the recording medium, and a display function similar to that of a book can be displayed. It is possible to provide a combined image display device.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an electronic page information distribution system as a background of the present invention.

FIG. 2 is an external view of an image display device according to the present invention.

FIG. 3 is a diagram showing an embodiment of a schematic view of an image display device according to the present invention.

FIG. 4 is a diagram showing an embodiment of a schematic view of an image display device according to the present invention.

FIG. 5 is a diagram showing a basic structure of an image display device according to the present invention.

FIG. 6 is a diagram illustrating a mechanism of a magnifying lens of the image display device according to the present invention.

FIG. 7 is a diagram showing a relational expression in the arrangement of the magnifying lens of the image display device according to the present invention.

FIG. 8 is a diagram showing an electronic circuit configuration of an image display device according to the present invention.

FIG. 9 is a diagram showing a display system of image data of the image display device according to the present invention.

FIG. 10 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 11 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 12 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 13 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 14 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 15 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 16 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 17 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 18 is a diagram showing a screen control display of the image display device according to the present invention.

FIG. 19 is a diagram showing a scaling function of the image display device according to the present invention.

FIG. 20 is a diagram showing a display of an enlarged screen of the image display device according to the present invention.

FIG. 21 is a diagram showing a display of an enlarged screen of the image display device according to the present invention.

FIG. 22 is a diagram showing a display of an enlargement / reduction standard screen of the image display device according to the present invention.

FIG. 23 is a diagram showing a screen activation process flow of the image display device according to the present invention.

FIG. 24 is a diagram showing page updating of the image display device according to the present invention.

FIG. 25 shows page selection (6 of the image display device according to the present invention.
A figure showing (page selection).

FIG. 26 is a diagram showing an appearance and an operation panel of the image display device according to the present invention.

FIG. 27 is a diagram showing an appearance and an operation panel of the image display device according to the present invention.

FIG. 28 is a diagram showing an appearance and an operation panel of the image display device according to the present invention.

FIG. 29 is a diagram showing a basic configuration of an electronic circuit of the image display device according to the present invention.

FIG. 30 is a diagram showing a configuration of an electronic circuit system block of the image display device according to the present invention.

FIG. 31 is a diagram showing data arrangement in a DRAM of the image display device according to the present invention.

FIG. 32 is a flowchart showing processing of display data of the image display device according to the present invention.

FIG. 33 is a flowchart showing a reproduction process of display data of the image display device according to the present invention.

FIG. 34 is a flowchart showing data enlargement processing of the image display device according to the present invention.

FIG. 35 is a flowchart showing a recording process of display data of the image display device according to the present invention.

[Explanation of symbols]

 1 Production Systems 3 Distribution Systems 5 Consumer Systems 10 Publishers 11 Newspapers 12 Newspapers 13 Publishers 14 Magazines 15 Small Publishers 20 Electronic Information Manufacturers 30 Distribution / Distributors 31 Intermediaries 32 Centers 40 Vending Machines 50 Consumer 51 Mobile Terminal (Image Display) 52 Recording Medium 53 Case 54 LCD 55 Frame 56 Hinges 57 Operation Panel 58 Magnifying Lens 59 Magnifying Lens Starting Mechanism 60 Play Button 61 Erase Button 62 Branch Fold Button 63 Chapter Button 64 Volume Button 65 rotation button 66 double-sided display button 67 enlargement button 68 reduction button 69 next page button 70 previous page button 71,72 driver 76,77,78 driver button 80 cursor button 81 power button

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H04N 1/387 H04N 1/387

Claims (17)

[Claims] 1. An image display device comprising: a main body having a display section having a first display surface and a display section having a second display surface; and a coupling section for coupling the two display sections into one. An image display device characterized in that display data from a recording medium is displayed horizontally on each display surface, and the display data is rotated 90 degrees to display vertically. 2. When the respective display surfaces of the two display parts are independently used, the first display surface can be displayed in portrait orientation and the second display screen can be replaced with landscape display. On the contrary, the image display device according to claim 1, wherein the first display surface can be horizontally long and the second display surface can be vertically long. 3. When the first display surface and the second display surface are combined and used as one connected display surface, the landscape display can be rotated by 90 degrees to be changed to the portrait display. The image display device according to claim 1. 4. The image display device according to claim 1, wherein the first display surface and the second display surface are activated at the same time when the power is turned on. . 5. The image display device according to claim 1, wherein the first display surface and the second display surface have independent startup power sources. 6. It is possible to activate only the first display device and not activate the second display device, and vice versa, to activate the second display device and not activate the first display device. The image display device according to claim 1, wherein the image display device is capable of 7. A4 as a display data format
The image display device according to any one of claims 1 to 6, wherein the plate has a vertical length of 400 dpi as a standard form. 8. The image display device according to claim 1, wherein the display data format includes one display page. 9. The image display device according to claim 1, wherein the display data format includes two display pages. 10. The image display device according to claim 1, wherein the display data format includes four display pages. 11. The image display device according to claim 1, wherein the display page in the display data format is set to be vertically long. 12. An image display device comprising: a main body having a display section having a first display surface and a display section having a second display surface; and a coupling section for coupling the two display sections together. The image display device according to any one of claims 1 to 11, wherein the data displayed on the display surface of the first display unit is enlarged and displayed on the display surface of the second display unit. . 13. The image display device according to claim 1, wherein a reference point for enlarging each display screen is provided at a corner of the screen. 14. The image display device according to claim 1, wherein a reference point for enlarging each display screen is provided so as to cover the entire screen by dividing the screen into nine. 15. When the two display screens are combined into one display screen, a reference point for enlarging the display screens is provided so as to cover the entire screen by dividing the entire screen into nine. Item 15. The image display device according to any one of items 14. 16. When the two display screens are combined into one display screen, a reference point for enlarging the display screens is provided so as to cover the entire screen by dividing the entire screen into 18 parts. Item 16. The image display device according to any one of items 15. 17. The image display device according to claim 1, wherein either one of the displayed display screens can be selected to enlarge only one screen. .