JPH1039803A - Electronic information display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic information display device which can incorporate picture information sent from an external host device in the order of the prescribed display. SOLUTION: After FAX receiving is started in a step b2, picture data sent in a page unit is stored in an input buffer in a step b3-b5, it is discriminated whether a picture display condition is specified or not in a step b6, various setting information such as specifying page number information and the like are detected in a step b7, and it is preserved in a corresponding page position of a page memory in a RAM. On the other hand, if specified page number information is specified in a step b11, picture data stored in the input buffer in a step b13 is preserved in a corresponding page position of a page memory. And picture data is displayed on a magnetic display sheet conforming to the order of a specified page number by interruption processing by a timer circuit. Further, picture data of which a display period elapses is deleted from a page memory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic information display device for recording and displaying a still image on a display based on image information sent from an external host device.

[0002]

2. Description of the Related Art Conventionally, a magnetically responsive magnetic display sheet has been known as a display body which develops or erases color in response to the direction and strength of a magnetic field (for example, Japanese Patent Application Laid-Open No. 48-48).
56393, JP-A-2-146082).

[0003] Such a magnetic display sheet can draw simple characters and figures by contacting a magnet pen with a built-in magnet on the sheet surface, and can be reused many times by erasing. Has been put to practical use.

In recent years, an electronic information display device has been developed which records and displays a still image on a magnetic display sheet by a recording head forming a dot matrix magnetic field based on print information sent from an external host device. Is being done.
Since the electronic information display device can change the display content arbitrarily by remote control from an external host device, it can be installed at public facilities, stations, retail stores, etc. Can be widely announced and advertised. In addition, poster replacement work is not required, which contributes to resource saving of paper and the like, and is therefore expected to be a future bulletin board.

[0005]

To such an electronic information display device, image data is transmitted from an external host device such as a facsimile (FAX) device or a computer. For example, when a facsimile apparatus is used, image data is transmitted through a public line according to the G3 (group 3) standard or the G4 (group 4) standard.

When using a computer,
After reading the transmission original with a scanner device or creating the transmission original using original editing software,
It can be sent over a public line via an AX modem or RS232
It can be transmitted by serial communication such as C or parallel communication such as the Centronics standard.

[0007] The electronic information display device includes a storage device for storing a plurality of image data, and the image data transmitted from the external host device is temporarily stored in the storage device. Thereafter, the image data stored in the storage device is displayed on the magnetic display sheet according to predetermined display operation conditions.

In a conventional electronic information display device, of a plurality of image data stored in a storage device, which image is displayed, which image is not displayed, in what order, or which image is displayed. , And an image management method such as which image is unnecessary has not been established yet.

It is an object of the present invention to provide an electronic information display device capable of incorporating image information transmitted from an external host device in a predetermined display order.

[0010]

SUMMARY OF THE INVENTION The present invention provides a writable and erasable display body, image storage means for storing a plurality of image information in page units, and a page order for displaying the image information. A display order storage unit for storing, a recording unit for reading out corresponding image information from the image storage unit in accordance with the page order stored in the display order storage unit, and forming the same as a still image on a display, Image management means for storing image information transmitted from the host device and designated page number information associated therewith in the image storage means and the display order storage means, respectively, and display period information of the image information stored in the image storage means And display means for clocking the current date and time, wherein the image management means deletes image information having display period information that has passed the current date and time. The features. According to the present invention,
By storing the display period information of the image information stored in the image storage unit and deleting the image information having the display period information after the current date and time, the storage capacity of the image storage unit can be effectively used. . Deletion of image information means, for example, clearing all image data or allowing overwriting of other data.

[0011]

FIG. 1 is a side sectional view of an electronic information display device according to the present invention, and FIG. 2 is a partial perspective view thereof. A driven roller 50 is disposed on the inner upper portion of the housing 1, and a driving roller 60 is disposed on the inner lower portion. A flexible and endless magnetic member is provided between the two rollers 50 and 60. The display sheet 10 is suspended. Roller 5
Numeral 0 is urged upward by an elastic member (not shown) such as a spring, and applies a constant tension to the magnetic display sheet 10 to stabilize the running of the sheet and maintain the flatness of the sheet surface. The roller 60 is driven to rotate by a motor 63 via gears 61 and 62. By driving the roller 60, the magnetic display sheet 10 is moved from bottom to top on the front side of the housing 1 (left side in FIG. 1 and rear side in FIG. 2), and from the rear side of the housing 1 (right side in FIG. In FIG. 2 (front side), circulation is performed so as to transfer from top to bottom. A display window 2 made of a transparent material such as acrylic resin or glass is formed on the front surface of the housing 1.

The recording head 30 is installed below the rear surface transfer side of the magnetic display sheet 10 and, based on a print signal from an external host device (not shown), directs a dot matrix toward the surface of the magnetic display sheet 10. A recording magnetic field is generated. The recording head 30 has a plurality of electromagnetic coils arranged in a staggered manner, for example, and is mounted on a carriage 31 that reciprocates in the sheet width direction. The carriage 31 is 2
Endless belt 3 suspended between two pulleys 34, 35
3 and a motor 36 that drives the pulley 35 to rotate while being guided by the two guide shafts 32.
Driven by

The erasing head 20 is composed of a permanent magnet or the like having a length equal to or larger than the sheet width. The erasing head 20 is arranged above the front transfer side of the magnetic display sheet 10 and in close contact with the back side of the magnetic display sheet 10. I have.

FIG. 3 is a partial sectional view showing the structure of the magnetic display sheet 10. On the magnetic display sheet 10, microcapsules 15 that develop color in response to magnetism are applied and fixed over the entire surface. The microcapsule 15 is composed of a high-viscosity liquid and a spherical shell that holds the liquid tightly.
In this liquid, substantially black magnetic particles and substantially white non-magnetic particles are dispersed. For example, black iron oxide (FeO) particles having a particle size of 0.1 to 5 μm are used as magnetic particles, and white titanium oxide particles having a particle size of 0.1 to 5 μm are used as nonmagnetic particles. In addition, as the high-viscosity liquid, an aqueous liquid, an oil or fat, an organic solvent including a surfactant-based solvent or the like is used, and gelatin is mainly used as a material of the spherical shell. Distributed in a range.

The microcapsules 15 are kneaded with a binder 14 made of a highly transparent synthetic rubber-based adhesive or the like, applied to a substrate 11 made of a transparent material such as polyethylene terephthalate, and have a thickness of, for example, 400 to 1000.
A μm capsule coating layer 12 is formed.

A protective sheet 13 made of, for example, a polypropylene long-fiber nonwoven fabric is adhered to the back surface of the capsule coating layer 12 so as to have a thickness of, for example, 300 to 1000 μm.
Seat running is facilitated.

On the other hand, the recording head 30 has a box-shaped yoke 39 made of a high magnetic permeability material, a magnetic core 37 erected inside the yoke 39 and made of a high magnetic permeability material, and an electromagnetic core mounted on the magnetic core 37. And a plurality of magnetic cores 37 and electromagnetic coils 38 corresponding to the plurality of print dots. A number of voids are formed on the printing surface 39a of the yoke 39, and the leading end of the magnetic core 37 is positioned at the center of each void, and the leakage magnetic field is generated by the presence of the void between the magnetic core 37 and the void. Occurs.

When the electromagnetic coil 38 is selectively energized in response to a print signal, a magnetic field is generated along the axial direction of the magnetic core 37 and passes through a magnetic circuit consisting of the magnetic core 37, a gap and a yoke 39. , A recording magnetic field is generated toward the magnetic display sheet 10.

Next, the principle of magnetic recording / display and erasure will be described. When the recording head 30 is brought close to the surface of the magnetic display sheet 10 where the substrate 11 is located, and a recording magnetic field is generated based on a print signal, the magnetic particles dispersed in the microcapsules 15 are attracted to the substrate 11 and the pressure is reduced. Thereby, the non-magnetic particles move to the protective sheet 13 side.
Then, when viewed from the front side of the magnetic display sheet 10, the portion to which the recording magnetic field is applied is observed to have a substantially black color. By applying the magnetic field in a dot matrix using the recording head 30, characters and symbols can be displayed. Can be recorded.

Next, when the erasing head 20 is brought close to the back side of the magnetic display sheet 10, that is, the side where the protective sheet 13 is located, the magnetic particles dispersed in the microcapsules 15 are attracted to the protective sheet 13 side, and the pressure is increased. As a result, the non-magnetic particles move toward the base 11. Then, when viewed from the front side of the magnetic display sheet 10, the portion to which the erasing magnetic field is applied becomes substantially white, and the erasing magnetic field is uniformly erased by applying the erasing magnetic field to the entire sheet width.

As the above-mentioned high-viscosity liquid in the microcapsule 15, a liquid having a predetermined viscosity is selected in order to maintain a display state of the magnetic particles moved to the back side or the front side by applying a magnetic field. That is, if the viscosity of the liquid is low, the display state is prevented from being disturbed by the particles that have once moved to the front side or the back side settling or moving due to vibration or the like. Therefore, the above-described recording head 3
The magnetic attraction force in the zero and erasing heads 20 needs to be greater than the yield value due to the viscosity of the liquid, and thereby writing and erasing of a display are performed.

Next, the operation of the entire apparatus will be described. Referring to FIGS. 1 and 2, first, before printing is started, the magnetic display sheet 10 is circulated at a constant speed and the erase head 20 is rotated.
To erase the entire surface. Next, a print signal is received from an external host device, and each time the development of image data for one print line is completed, the recording head 30 is moved for several milliseconds to several hundred milliseconds while moving in the sheet width direction. The magnetic printing is performed by applying the pulse current described above and applying a dot matrix magnetic field to the surface of the magnetic display sheet 10.

When printing of one line is completed, the magnetic display sheet 10 is moved by a predetermined feed pitch and stopped, and then printing is performed based on the image data developed for the next printing line. Thus, the development of the image data, the recording head 30
The image of one sheet is formed while repeating the serial printing and the intermittent feeding of the magnetic display sheet 10.

Next, when a new image is printed, the magnetic display sheet 10 is circulated at a constant speed to erase the entire surface by the erasing head 20, and then the recording head 3 is printed.
Performs serial printing with 0.

FIG. 4 is a block diagram showing the electrical configuration of the electronic information display device according to the present invention. The electronic information display device includes a CPU (central processing unit) 71 for controlling the operation of the entire device according to a predetermined program, a clock circuit 72 for generating a clock for determining the operation timing, and a timer circuit 73 for measuring the elapsed time. A clock circuit 91 for measuring today's date, day of the week and current time; an operation panel 75 including various switches and display LEDs (light emitting diodes); and an input / output (I
/ O) circuit 74 and an EPROM (Electrically Programmable Read Only) for storing programs and data.
Memory) 76 and an EEPROM (Erasable Electrically Programmable R) for storing data in a rewritable manner.
ead Only Memory) 77, a system control circuit 78 for managing display-related management and control related to the entire apparatus such as an initial operation at power-on, and an interface circuit 80 for communicating with external devices. An interface (I / F) control circuit 79 for controlling the interface circuit 80; a motor control circuit 83 for controlling the number of rotations and the direction of rotation of the motors 36 and 63; and a head control for controlling the operation of the recording head 30. Circuit 84 and a RAM (Random) for temporarily storing various data such as print data.
Access Memory) 85, a memory control circuit 86 for controlling a use area of each of the memories 76, 77, 85, and a motor 3
6, 63 and a driver circuit 88 for driving the recording head 30, a driver control circuit 87 for controlling the driver circuit 88, and a bus 70 for interconnecting the circuits.

The interface circuit 80 is a facsimile modem (facsimile modem) for transmitting / receiving a signal to / from another facsimile apparatus via a transmission line such as a telephone line.
81 and a serial communication circuit 82 for transmitting and receiving signals to and from another computer in accordance with a communication standard such as RS232C.
And

The alarm circuit 90 includes a sound source such as a buzzer, a chime, and a speaker, and a light source such as a lamp and a light-emitting diode, and is connected to the input / output circuit 74.

FIGS. 5 to 10 are flowcharts showing the operation. First, in step a1 of FIG.
1 is an EPROM 76 as shown in FIGS.
Data is taken out of various setting information stored in advance in the EEPROM 77 and initialized in the RAM 85.
Here, the total number of pages P is the number of pages of the image stored in the RAM 85, and the initial value is “8”. The timer value T is the time when the timer circuit 73 measures the timer interrupt and generates a timer interrupt. The initial value is “0” which means that the timer interrupt is generated immediately after the power is turned on.

Next, in step a2, it is determined whether or not there is an incoming fax. If there is no incoming fax, the process proceeds to step a4, and it is determined whether or not there is a timer interrupt for determining the timing of switching the current display image to the next image. If there is no timer interrupt, the process returns to step a2, and waits in a loop until a facsimile incoming call of step a2 or a timer interrupt of step a4 occurs.

When a facsimile call arrives at step a2,
At step a3, a reception processing routine is executed. If a timer interrupt occurs in step a4, step a4
At 5, the interrupt processing routine is executed.

FIG. 6 is a flowchart showing the reception processing routine of step a3. First, in step b1, a storage designation area M for storing display image data and designation information accompanying the display image data is initialized to M = 0,
In step b2, the FAX modem 81 starts receiving FAX data. In step b3, it is determined whether reception of one page of image data has been completed. Until the image data reception is completed, the scanning line is scanned in step b4. Each time the data is received, the received data is stored in the input buffer set in the RAM 85 in step b5. When the reception of the image data for one page is completed, the process proceeds to step b6, and it is determined whether or not the received image data is a command transmission original designating image display conditions.

FIG. 13 is a diagram showing an example of a command transmission document. A plurality of columns B6 that can be selected as filled or blank are regularly arranged in the command transmission original, and a desired column B is selected.
6 is recorded in a mark sheet system which indicates the contents of the command by painting the area with a pencil or the like. In the command transmission document, a command document mark BB indicating that the transmission image is a command transmission document specifying display conditions is recorded, and by determining the presence or absence of this portion, the display condition specification in step b6 is determined. The presence or absence has been determined. Various operation conditions such as image display conditions are described for each item. For example, the designated page number is “2”, the display start time is 8:00,
The display end time is specified as 17:00, the day of the week is specified on Friday and Saturday, the display period is specified as starting January 01, 1999 and ending February 01, 1999, and the display time (timer) as 30 minutes. I have. Note that a mark index BA is printed on an extension of each column B6 in the arrangement direction.

Returning to FIG. 6, a search is made for a command document mark BB for determining whether or not the document transmitted in step b6 is a command transmission document. In step b7, the command data stored in the input buffer as image data is analyzed, and
Various designated information such as display time information, display time zone information, display period information, and day of the week designation information are detected and stored in a page memory set in the RAM 85. Here, the designated page number is a page number indicating the display order of images, the display time is a time for displaying the transmitted image, the display time period is a time period during which image display is allowed, and the display period is an image period. This is a period during which display is permitted, and the day designation is a day on which an image is displayed.

FIG. 11 is an explanatory view showing an example of the data format of the page memory. FIG. 11A shows a state in which the designation information and the image data after the current date and time are deleted.
FIG. 11B shows the data format of the page memory after deletion. The page memory set in the RAM 85 has a storage capacity for storing, for example, eight pages of designation information and display image data.

In FIG. 11A, for example, looking at the designated information of the first page, the designated page number is "1", the display time is "30" minutes, and the display time zone is "8:00 to 17:00".
Minutes ”and the display period is“ January 1, 1999 to January 15, 1999.
"Day" and "0111110", which means Monday, Tuesday, Wednesday, Thursday and Friday, are designated for the day designation. For example, looking at the designated information of the second page, the designated page number is “2”, the display time is “30”, the display time zone is “8:00 to 17:00”, and the display period is “99”. Various conditions are set, such as "January 1, 1999 to February 1, 1999", and the designation of the day of the week is "0000011", which means Friday and Saturday. Looking at the designated information on the third page, the designated page number is “3” and the display time is “1”.
0 ”minutes, and the display time zone is“ 8:00 to 17:00
Minutes ”, and the display period is“ January 1, 1999 to September 1, 1999.
Various conditions such as "day" and "0001111", which means Wednesday, Thursday, Friday and Saturday, are designated for the day of the week. A display image storage area for storing display image data is prepared so as to correspond one-to-one with such designation information.

Here, an example of storing image data of eight pages has been described. However, by increasing the storage capacity of the RAM 85 or by using a large-capacity storage device such as a hard disk or an optical disk together, the number of image storage pages and the initial number can be reduced. The total number of pages in the settings can be increased.

Returning to FIG. 6, in step b8, the designated page number information is set in the variable M. If there is transmission data of the next page in step b9, the flow returns to step b3 to receive the transmission original of the next page by fax. I do. If there is no transmission data for the next page, the facsimile reception is terminated in step b10, and the line is disconnected.

On the other hand, if the display condition is not specified in step b6, the process proceeds to step b11 to determine whether or not the storage specification area M is specified, that is, M = 0. When it is determined that there is no free area, a free area check routine for checking the free area of the display image storage area is executed in step b12.

FIG. 14 shows an example of an image transmission original. If the command document mark BB does not exist in the transmission document, there is no designation of the display condition, so that it is stored as display image data in the display image storage area of the designated page number of the storage designation area M.

For example, when two pages of transmission originals shown in FIGS. 13 and 14 are continuously received by facsimile, first, the designated page number "2" designated by FIG. 13 and the display time (timer) are 30 minutes. "30" indicating display, 8 during display time
"0" to specify the display time zone from 0:00 to 17:00
800 1700 ”, and the display period is designated as“ 99010 ”from January 1, 1999 to February 1, 1999.
1 990201 "and the designation of day of the week" 00000011 "for displaying on Friday and Saturday are stored as shown in FIG. Next, in the display image storage area, the image data shown in FIG. 14 transmitted following the command transmission document is stored in the display image storage area of the designated page number “2” in FIG.
It is stored as shown in “illustration of the sun and the mountains” in FIG.

On the other hand, if the storage designation area M is designated, that is, if M ≠ 0, the number of the storage designation area M is used as it is as the page number of the page memory without performing the free area check in step b13. You.

FIG. 7 is a flowchart showing a free area check routine in step b12. First, at step c1, a variable L = 1 is set, and at step c2, the number of pages L is set.
Then, it is determined whether or not the display image storage area corresponding to is empty, and if it is empty, the process jumps to step c6 and substitutes the variable L for the location indicating the empty area, that is, the storage designated area M, and ends.

When there is no command data,
Since there is no designated information corresponding to the image data, EEPRO
Control related to the display operation is performed based on the default setting values set in M77.

On the other hand, if the display image storage area of the number L of pages is not empty in step c2, the variable L is set to 1 in step c3.
In step c4, it is determined whether or not the variable L has exceeded the total page number P, and step c2 is repeated until the variable L exceeds the total page number P.

If there is no empty page in the display image storage area, reference is made to a page Lo designated when no empty area is preset in the EEPROM 77, and L is set to Lo in step c5. If there is no empty page in the display image storage area and it is desired to discard the image data in the input buffer, it is necessary to set the designated page when no empty area is set to Lo = 0, and that there is no empty area in step c6. M = 0 is set and the processing ends. If the user wants to write the image data of the input buffer to a specific page, the page number to be written to the designated page Lo when there is no empty area (for example, if there is no empty page area in the display image storage area, If it is desired to always write to the designated page number 1, a designated page (Lo = 1 when there is no free area) is set. As a result, the page number to be written is set in the variable M in step c6, and the process ends.

It should be noted that the value of the designated page Lo when there is no free area is determined by data input from the operation panel 75 or the interface circuit 8.
It can be set by remote data input via 0.

Returning to FIG. 6, the image data in the input buffer is stored in the display image storage area corresponding to the storage designation area M in step b13. The old image data stored in the display image storage area is replaced and deleted by overwriting. When M = 0, there is no free area, and the image data in the input buffer is discarded. Next, at step b14, the storage designation area M is incremented by one, and at step b15, it is determined whether or not the storage designation area M is larger than the total number of pages P. In step b16, the storage designated area M is set to 1 so that data can be stored, and the process proceeds to step b9.

When the reception processing routine of FIG. 6 ends, the process returns to step a4 of FIG. In this way, command data indicating various conditions is analyzed from the image data of the transmission original,
Image display conditions and the like are stored in the RAM 85.

FIG. 8 is a flowchart showing the interrupt processing routine of step a5. When the timer circuit 73 generates an interrupt, the page number (designated page number) N currently being displayed is read in step d1 and set to the display number L. The designated page number N in the non-display state is 0. Next, one is added to the display number L in step d2, and if the display number L exceeds the total number of pages P in step d3,
In step d4, if an interrupt occurs in the non-display state, the image search can be stopped in the next step d5, and if an interrupt occurs in the image display state, the first search is performed.
The display number L is set to 0 so that the presence or absence of a page image can be searched.

Next, at step d5, L = N is determined, and
When the search for the next image to be displayed has completed one round, the search is stopped and an image display stop process is performed when the image data to be displayed is not in the display image storage area. After resetting 73, it has been restarted.

If image data corresponding to the display number L exists at step d6, a display permission check routine is executed at step d7 to determine whether display of the image data is permitted. The return value of the display permission / inhibition check routine is a display flag DF. DF = 1 when display is permitted and DF = 0 when display is prohibited. Step d
In step 8, the display flag DF is determined, and if DF = 0, nothing is displayed and the process returns to step d2. If DF = 1, the display number L is set to the designated page number N in step d9, and display processing of the image data corresponding to the designated page number N is executed in step d10. At this time, the designated page number N is E
The data is also written in the EPROM 77 and is used as an initial setting value when the power is turned on next time.

By adding the variable L one by one, the display image data in the page memory is displayed according to the order of the corresponding designated page number.

FIG. 9 is a flowchart showing a display processing routine of step d10. First, in step e1,
After the alarm circuit 90 is operated to turn on the rewrite display lamp to call attention to the passerby, the image data corresponding to the designated page number N is read into the print buffer set in the RAM 85, and the magnetic data is read in step e2. While transporting the display sheet 10, the recording head 30 performs magnetic recording based on the image data in the print buffer. At step e3, it is determined whether or not the recording operation for one page has been completed. When the operation is completed, the magnetic display sheet 10 is transported to the display area corresponding to the display window 2 at step e4.

Next, after the rewriting display lamp is turned off in step e5, the display time of the image data corresponding to the designated page number N, that is, the timer designated time is read from the RAM 85, and this display time is read in the timer circuit 7 in step e6.
Set to 3 to set the time until the next timer interrupt, and the timer circuit 73 starts the timing operation at step e7. The current image display is continued until the next timer interrupt occurs, that is, until the display time set in the timer circuit 73 has elapsed.

FIG. 10 is a flowchart showing a display availability check routine of step d7. First, in step f1, a display flag DF = 0 is set as a default (default value).
Is set, and in step f2, it is determined whether or not today's date falls within the display period designation range corresponding to the display number L. Note that today's date, day of the week, and current time are obtained by referring to a clock circuit 91 as shown in FIG. If the display period designation is appropriate, it is determined in step f3 whether today's day of the week matches the day designation. If the day of the week designation is appropriate, it is determined in step f4 whether the current time is within the range of the display time zone. When the display period, the day of the week, and the display time zone are all satisfied in the image display conditions, step f
In step 5, the display flag DF = 1 is set, and the process returns to step d8. If even one of the image display conditions is not satisfied,
The process returns with the display flag DF = 0.

On the other hand, if it is out of the range of the display period in step f2, it is determined in step f6 whether or not the display period has passed at present, and if it has passed, the display image corresponding to the display number L is stored in step f7. Clear all image data and specified information in the area.

Here, the erasure of the image data and the designation information exceeding the display period will be specifically described.

First, when the current date is 1 as shown in FIG.
Assuming that the date is January 16, 999, as shown in FIG. 11A, for example, when data exists only in the first, second, and third pages, the third It is assumed that the page is displayed. Next, when a timer interrupt occurs after a predetermined display time, an interrupt process as shown in FIG. 8 is performed. At this time, since there is no data on the third and subsequent pages, the processing from step d2 to step d6 is repeated to return to the first page and search for a display image. Since a display image exists on the first page, a display permission / inhibition check as shown in FIG. 10 is performed in step d7. Looking at the designated information on the first page, the display period is “from January 1, 1999 to 99
Since the display expiration date has passed since January 15, the image data and the designation information in the display image storage area for the first page are cleared in step f7 as shown in FIG. 11B.

As described above, in the receiving process of FIG.
X When storing the received image data in the page memory,
Detect the designated page number sent with the image data,
The designated page is set in the storage designated area M, and the display image data is stored at the corresponding page position in the page memory.
Then, by the interruption processing by the timer circuit 73,
The image data is displayed on the magnetic display sheet 10 according to the order of the designated page numbers. Further, the image data that has passed the display period is deleted from the page memory, so that the RAM 85 can be effectively used.

[0060]

As described above, according to the present invention, the image information transmitted from the external host device is stored in the image storage means, and the designated page number information accompanying the image information is stored in the display order storage means. By storing, the display order of the new image information can be incorporated into the predetermined display order. In addition, since the operation of incorporating the display order can be realized remotely, the burden on the user can be reduced,
Diversification of advertising content is also facilitated.

Further, the display period information of the image information stored in the image storage unit is stored, and the image information having the display period information after the current date and time is deleted, so that the storage capacity of the image storage unit is reduced. Can be used effectively.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electronic information display device according to the present invention.

FIG. 2 is a partial perspective view showing an electronic information display device according to the present invention.

FIG. 3 is a partial sectional view showing a structure of a magnetic display sheet 10.

FIG. 4 is a block diagram showing an electrical configuration of the electronic information display device according to the present invention.

FIG. 5 is a flowchart showing an operation.

FIG. 6 is a flowchart showing a reception processing routine of step a3.

FIG. 7 is a flowchart showing a free area check routine in step b12.

FIG. 8 is a flowchart showing an interrupt processing routine of step a5.

FIG. 9 is a flowchart showing a display processing routine of step d10.

FIG. 10 is a flowchart showing a display permission / inhibition check routine in step d7.

11A and 11B show an example of a data format of a page memory. FIG. 11A shows a state before deletion of designation information and image data, and FIG. 11B shows a state after deletion.

12A shows data in an EPROM 76, and FIG. 12B shows data in an EEPROM 77. FIG.

FIG. 13 is a diagram illustrating an example of a command transmission document.

FIG. 14 illustrates an example of an image transmission document.

FIG. 15 is a diagram showing data in a clock circuit 91.

[Explanation of symbols]

 Reference Signs List 1 housing 2 display window 10 magnetic display sheet 20 erasing head 30 recording head 31 carriage 36, 63 motor 50, 60 roller 71 CPU 73 timer circuit 74 input / output circuit 80 interface circuit 85 RAM

Claims (1)

[Claims] 1. A writable and erasable display body, an image storage means for storing a plurality of image information in page units, and a display order storage means for storing a page order for displaying the image information. Recording means for reading out the corresponding image information from the image storage means in accordance with the page order stored in the display order storage means and forming it as a still image on a display; and image information transmitted from an external host device And image management means for storing designated page number information associated therewith in the image storage means and the display order storage means, respectively, and display period storage means for storing display period information of the image information stored in the image storage means. A clock means for measuring the current date and time, wherein the image management means deletes image information having display period information after the current date and time. Broadcast display device.