JP2004284129A - Displaying apparatus, writing apparatus and displaying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a displaying apparatus having information on the number of writings indicating the number of writing images, a writing apparatus for controlling writing of the images to the displaying apparatus based on the information on the number of writings, and a displaying system including the displaying apparatus and the writing apparatus. <P>SOLUTION: The type of a displaying medium 102 and the information on the number of writings recorded in a memory 104 are read (step 302). Based on the type of the displaying medium 102 and the information on the number of writings, a condition for writing an image into the displaying medium 102 is changed (step 304). Based on the condition changed, the image is written into the displaying medium 102 (step 306). The information on the number of writings recorded in the memory 104 is changed (step 308). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display device, a writing device, and a display system, and in particular, includes a display device that displays an image, a writing device that writes an image on the display device, and the display device and the writing device. Related to display systems.
[0002]
[Prior art]
In a conventional charging system for charging for printing on a paper medium, a server manages the status of printing on a paper medium and charging based on the printing status (for example, see Patent Document 1). However, according to such a billing system, it is not possible to manage the print situation and the billing based on the print situation when the server cannot be connected. In such a case, the client who prints on the paper medium can temporarily record the print status and the charge based on the print status.
[0003]
On the other hand, unlike a medium such as a paper medium which can be printed only once, a rewritable medium such as an electronic paper may be rented by limiting the number of times of writing. The number of times of writing is determined according to the rental fee or the number of times the rewritable medium can be written. Also in this case, the number of times of writing to the rewritable medium and charging based on the number of times of writing can be performed by a server or a writing device that writes to the rewritable medium.
[0004]
[Patent Document 1]
JP 2001-350936 A
[0005]
[Problems to be solved by the invention]
However, when connection to the server is not possible, or when writing is performed on the rewritable medium by a different writing device, the number of times of writing to the rewritable medium and charging based on the number of times of writing are performed on the server or the rewritable medium. It cannot be performed by a writing device or the like.
[0006]
The present invention has been made in view of the above facts, and has a display device having write number information indicating the number of image writes, and a writing device for controlling writing of an image to the display device based on the write number information. And a display system including the display device and the writing device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a display device according to claim 1, wherein a display medium for displaying an image, and a recording unit for recording write number information indicating the number of times of writing an image on the display medium are provided. And
[0008]
That is, since the display medium displays the image, and the recording unit records the number-of-writes information indicating the number of times of writing the image on the display medium, when the server cannot be connected, or when a different writing device is used. Even when an image is written to the display device, the display device itself can hold the number-of-writes information indicating the number of writes to the display device.
[0009]
As described in claim 2, the display medium in the display device according to claim 1 may be a memory display medium.
[0010]
As described in claim 3, the number-of-writes information in the display device according to claim 1 or 2 may be at least one of visible information and invisible information. Here, the visible information is information that can be visually identified by characters, numerals, and the like, and the invisible information is information that cannot be visually identified by electricity, magnetism, and the like. .
[0011]
As described in claim 4, the recording unit of the display device according to claims 1 to 3 may be a part of a display medium.
[0012]
As described in claim 5, the display medium of the display device according to claims 1 to 4 may be an optical writing type display medium.
[0013]
7. A writing device according to claim 6, wherein the access unit accesses the information on the number of times of writing recorded in the recording unit of the display device according to any one of claims 1 to 5, and the display medium. Writing means for writing an image to the display medium, and control means for controlling the access means so as to change the writing frequency information accessed by the access means when the writing means writes an image on the display medium. And
[0014]
That is, an access unit accesses the number-of-times-of-writing information recorded in the recording unit of the display device according to any one of claims 1 to 5, a writing unit writes an image on the display medium, When the control means controls the access means to change the information on the number of times of writing accessed by the access means when an image is written on the display medium by the writing means, When the connection cannot be established, or even when an image is written to the display device by a different writing device, the display device itself can hold the number-of-writes information indicating the number of writes to the display device. .
[0015]
According to a seventh aspect of the present invention, the control unit of the writing device according to the sixth aspect changes the condition for writing an image based on the information on the number of times of writing and writes the image. The writing means may be controlled.
[0016]
According to an eighth aspect of the present invention, the writing device according to the sixth or seventh aspect determines, based on the number-of-times-of-writing information, whether to permit writing of an image on the display medium. Means for controlling the writing means so as not to write the instructed image on the display medium when the determination means determines that writing of the image is not permitted. You may make it.
[0017]
According to a ninth aspect of the present invention, in the writing device according to the eighth aspect, the control unit writes the designated image when the determination unit determines that the image writing is not permitted. The writing means may be further controlled so as to write a predetermined image to the display medium for notifying that is not permitted.
[0018]
According to a tenth aspect of the present invention, in the writing device according to the eighth or ninth aspect, the control unit writes the image on the display medium when the determination unit determines that the image writing is not permitted. The writing means may be further controlled so as to reduce the display quality of the displayed image.
[0019]
According to an eleventh aspect, the writing device according to the sixth or seventh aspect determines, based on the number-of-times-of-writing information, whether to permit writing of an image on the display medium. The control means, when the determination means determines that the writing of the image is not permitted, reduces the display quality of the specified image and displays the specified image on the display medium. The writing means may be controlled to perform writing.
[0020]
As described in claim 12, in the writing device according to claims 6 to 11, the display device may be detachably connected.
[0021]
As described in claim 13, the writing device according to any one of claims 6 to 12 may further include an output unit that outputs the number-of-times-of-writing information to the outside.
[0022]
According to a fourteenth aspect, the writing device according to the sixth to thirteenth aspects further includes input means for externally inputting new write count information, and the control means includes a control unit of the display device. The access unit may be controlled so that the number of times of writing recorded in the recording unit is changed based on the new information of the number of times of writing.
[0023]
A display system according to a fifteenth aspect is a display device according to any one of the first to fifth aspects, a writing device according to the thirteenth or fourteenth aspect, and output from an output unit of the writing device. And a server for inputting the write count information.
[0024]
That is, since the server inputs the number-of-times-of-writing information output from the output unit of the writing device, when the server cannot be connected, an image is written on the display device by a different writing device. Even in this case, the display device itself can hold the number of times of writing indicating the number of times of writing to the display device, and the server can determine the number of times of writing to the display device based on the number of times of writing. Can also be managed.
[0025]
As described in claim 16, the server of the display system according to claim 15 may output the new writing count information to the writing device.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
[0027]
As shown in FIG. 1, the display system 30 according to the present embodiment includes a display device 10, a writing device 20, and a server 222. The display device 10 includes a display medium 102 for displaying an image, a memory 104 as a recording unit for recording information on the number of times of writing, an interface 108 for relaying connection with an external device, and a display medium 102, the memory 104, And a controller 106 for controlling the interface 108.
[0028]
Here, the number-of-times-of-writing information recorded in the memory 104 is information indicating the number of times of writing of an image displayed on the display medium 102 to the display medium 102. For example, the initial value may be set to 0 and incremented each time an image is written, or a predetermined value may be set as the initial value and decremented each time an image is written.
[0029]
On the other hand, the writing device 20 includes a switch group 212 for the user to input instruction information and the like, a display 214 for notifying the user of status information and the like, interfaces 208 and 218 for relaying connection with external devices, and Switch group 212, a display 214, and a controller 216 for controlling the interfaces 208 and 218. The controller 216 constitutes access means, writing means, control means, and judgment means, and the controller 216 and the interface 218 constitute output means and input means.
[0030]
The interface 108 of the display device 10 and the interface 208 of the writing device 20 are connected, and the interface 218 of the writing device 20 is connected to a personal computer 220 that inputs an image written on the display device 10. The personal computer 220 is connected via a network such as the Internet 224 to a server 222 that can manage the number of times of writing on the display device 10.
[0031]
The connection between the display device 10 and the writing device 20 and the connection between the writing device 20 and the personal computer 220 may be wired or wireless. In the case of a wired connection, the connection can be made detachable. Further, communication between the connections may be serial or parallel.
[0032]
Next, the operation of the present embodiment will be described with reference to FIG. It is assumed that the type of the display medium 102 and the information on the number of times of writing are recorded in advance in the memory 104 in the present embodiment. These may be recorded by the user or may be recorded by the manufacturer.
[0033]
When the controller 216 of the writing device 20 recognizes that the interface 108 of the display device 10 and the interface 208 of the writing device 20 have been connected, the processing in FIG. 2 is started.
[0034]
In step 302, the controller 216 accesses the memory 104 and reads the type of the display medium 102 and the information on the number of times of writing from the memory 104. In step 304, the controller 216 changes the conditions for writing an image on the display medium 102 according to the type of the display medium 102 and the information on the number of times of writing.
[0035]
For example, the process of step 304 can be performed by recording in advance the map of the type and the number of times of writing of the display medium 102 and the conditions for writing the image in the controller 216. That is, a condition for writing an image on the display medium 102 can be obtained from the map based on the type of the display medium 102 and the information on the number of times of writing. However, the present invention is not limited to this. For example, the memory 104 or the controller 106 of the display device 10 has a map of the number of times of writing and a condition for writing an image, and the controller 216 of the writing device 20 This may be used. Conditions for writing an image include, for example, an applied voltage value, a light amount, and a pulse width, but the present invention is not limited to these.
[0036]
In step 306, an image is written on the display medium 102 according to the changed condition. When the display medium 102 is a display medium other than the optical writing type, the image is recorded in the controller 216 in advance by an external device such as the personal computer 220 via the interface 208. The case of the optical writing type display medium will be described later.
[0037]
In step 308, the memory 104 is accessed to change the number-of-writes information, and the process ends. Here, the number-of-writes information is incremented. In the present invention, the initial value of the number of times of writing is set to, for example, 0, and is described as being incremented every time an image on the display medium 102 is written. However, the present invention is not limited to this. A value other than 0 may be set as the value, or the write count information may be decremented each time an image is written.
[0038]
As described above, the display medium 102 of the display device 10 according to the first embodiment displays an image, and the memory 104 records the number of times of writing indicating the number of times of writing the image on the display medium 102. That is, the display medium of the display device displays an image, and the recording unit records the information on the number of times of writing of the image. Even when writing is performed, the display device itself can hold the number-of-writes information indicating the number of writes to the display device.
[0039]
The controller 216 of the writing device 20 accesses the writing count information recorded in the memory 104 of the display device 10, writes an image on the display medium 102, and writes the image on the display medium 102. Control is performed to change the number-of-times information. That is, the access unit accesses the write count information recorded in the recording unit of the display device, the write unit writes the image on the display medium, and the control unit writes the image to the display medium by the write unit. When the image is written, the access unit is controlled so as to change the write count information accessed by the access unit. Therefore, when it is not possible to connect to the server, or to a display device using a different writing device. Even when the image is written, the display device itself can hold the number-of-writes information indicating the number of writes to the display device.
[0040]
The controller 216 of the writing device 20 controls the writing of the image by changing the conditions for writing the image based on the information on the number of times of writing. That is, the control unit of the writing device controls the writing unit to change the condition for writing the image and write the image based on the information on the number of times of writing.
[0041]
Since the characteristics of the display medium change according to the number of times of writing of the image, if the image is written under the same condition regardless of the number of times of writing, the written image may not have sufficient display quality. According to the present invention, the display device has the number-of-writes information, and the image is written with the conditions changed based on the number-of-writes information. Even when an image is written to the display device by the writing device, the writing device used for writing the image can obtain the information on the number of times of writing of the display device. Display quality can be provided.
[0042]
The display medium 102 may be a memory-type display medium, but the present invention is not limited to this.
[0043]
Next, the operation of the second embodiment of the present invention will be described with reference to FIG. Since the configuration of the second embodiment is the same as that of the first embodiment, the same reference numerals as those in FIG. 1 are used and the description is omitted. In the information on the number of times of writing in the memory 104 in the present embodiment, the number of times that the image on the display medium 102 can be written is recorded as an initial value. Here, the number of writable times may be a limited number of times of writing when the display medium 102 is rented with a limited number of times of writing, or may be an image determined by the characteristics of the display medium 102. The number of times of writing may be such that sufficient display image quality can be guaranteed.
[0044]
The processing of FIG. 3 is started when the controller 216 of the writing device 20 recognizes that the interface 108 of the display device 10 and the interface 208 of the writing device 20 are connected. In step 322, the controller 216 of the writing device 20 accesses the memory 104 of the display device 10 and reads the information on the number of times of writing from the memory 104. At step 324, it is determined whether or not the number-of-writes information is a predetermined value. Here, it is determined whether or not the number of writing times information is 0. That is, it is determined whether or not the writing of the writable number of images has already been performed. If the number-of-writes information is not 0, the image is written to the display medium 102 by the controller 216 in step 326, and the controller 216 accesses the memory 104 in step 328 to change the number-of-writes information in the memory 104 for processing. To end. Here, the number-of-writes information is decremented.
[0045]
If it is determined in step 324 that the number-of-writes information is 0, in step 330, the controller 216 writes a predetermined image for notifying the prohibition of image writing on the display medium 102, and ends the process. .
[0046]
In step 330, for example, as shown in FIG. 15, an image indicating that the number of times of writing has been exceeded may be imposed on the already written image, or as shown in FIG. Alternatively, the display quality of the already written image may be reduced and displayed, and an image indicating that the number of times of writing has been exceeded may be displayed. Further, a process of making settings that cannot be written to the display medium 102 may be performed.
[0047]
Further, in step 330, the image instructed to be written may be written by lowering the display quality of the image, and an image indicating that the number of times of writing has been exceeded may be displayed. Note that the notification of the write prohibition may be displayed on the display 214 of the writing device 10 or may be made by generating a predetermined sound using a speaker.
[0048]
In the present invention, the number of writable times is set as an initial value of the number-of-times-of-writing information, but the present invention is not limited to this. For example, 0 may be set as an initial value. In this case, in step 324, it is determined whether or not the number-of-writes information is the writable number, and in step 328, the number-of-writes information may be incremented.
[0049]
As described above, the controller 216 of the writing device 20 accesses the number-of-writes information recorded in the memory 104 of the display device 10 and writes an image on the display medium 102 based on the number-of-writes information. It is determined whether or not to permit, and if it is determined that the writing of the image is not permitted, the writing of the specified image to the display medium 102 is not performed.
[0050]
That is, it is determined whether or not the writing of the image on the display medium is permitted based on the information on the number of times of writing. If it is determined that the writing of the image is not permitted, the writing of the designated image on the display medium is performed. The writing means is controlled so as not to perform writing to the display device even when the connection to the server cannot be established or when an image is written to the display device by a different writing device. The display device itself can hold the number-of-writes information indicating the number of times. Thereby, the writing device can acquire the information on the number of times of writing of the display device, and when the number of times of writing exceeds a preset number of times of writing, the writing of the image can be prevented.
[0051]
According to this, even when a user uses a display device having a writable number of times, an image of the display device can be written by a different writing device, and the user himself manages the number-of-writes information. can do. Further, even for a manufacturer that rents a display device with a limited number of writing times, even if a user writes an image on the display device using a different writing device, the number of writing times information can be managed. Can be increased, and writing can be prevented from being performed more than the limited number of times.
[0052]
Next, the operation of the third embodiment of the present invention will be described with reference to FIG. Since the configuration of the third embodiment is the same as that of the first and second embodiments, the same reference numerals as those in FIG. 1 are used and the description is omitted. In the information on the number of times of writing of the memory 104 in the present embodiment, the current number of times of writing of the image on the display medium 102 is recorded.
[0053]
The interface 108 of the display device 10 is connected to the interface 208 of the writing device 20, the interface 218 of the writing device 20 is connected to the personal computer 220, and the personal computer 220 and the server 222 are connected to a network such as the Internet 224. 17 is started when the controller 216 of the writing device 20 recognizes that the connection has been made via the. In step 402, the controller 216 of the writing device 20 accesses the memory 104 of the display device 10 and reads the number of writing times information and the type of the display medium 102 from the memory 104.
[0054]
In step 404, the controller 216 outputs the number of writing times information and the type of the display medium 102 from the interface 218. The output information on the number of times of writing and the type of the display medium 102 are transmitted to the server 222 via the personal computer 220 and the Internet 224. At step 406, controller 216 outputs from interface 218 the number of writes for which the increment is desired, ie, the number of recharge writes. The number of writes for which the increment is desired can be input by the user from the switch group 212.
[0055]
The number of writes desired to be incremented is received by server 222 and a determination is made as to whether an increase in the number of writes is permitted. The determination as to whether or not the increase in the number of writings is permitted may be made, for example, based on the number of writable times based on the type of the display medium 102, or based on the amount paid in advance by the user or the credibility of the user. It may be made on the basis of.
[0056]
If the server 222 determines that the increase in the number of times of writing is permitted, the server 222 transmits information on the number of times of writing to allow the increase to the controller 216 via the Internet 224 and the personal computer 220. . Here, the information on the number of times of writing may indicate the number of times of writing whose increment is desired by the user, or may indicate the number of times of writing determined that the server 222 can permit the increment. Good. In step 408, the controller 216 waits until the information on the number of times of writing, that is, the recharge information, is received. When it is determined that the information has been received, the controller 216 stores the information in the memory 104 of the display device 10 in step 410. Access is made, the number of times of writing is changed based on the information of the number of times of writing, and the process is terminated. If the information of the number of times of writing is not received in step 408 for a predetermined time, the process may be terminated assuming that the increment of the number of times of writing is not permitted.
[0057]
As described above, the writing device 20 can output the information on the number of times of writing to the server 222, and inputs new information on the number of times of writing from the server 222. The controller 216 of the writing device 20 controls to change the number-of-times-of-writing information recorded in the memory 104 of the display device 10 based on the input new number-of-times-of-writing information. That is, the writing device inputs new information on the number of times of writing from the outside and controls the writing device to change the information on the number of times of writing recorded in the recording section of the display device based on the new information on the number of times of writing. Therefore, even if it is not possible to connect to the server or if an image is written to the display device by a different writing device, the display device displays the number of times of writing indicating the number of times of writing to the display device. The server can manage the number of times of writing to the display device based on the number of times of writing information.
[0058]
In the present embodiment, the controller 218 of the writing device 20 controls the processing. However, the present invention is not limited to this. For example, the personal computer 220 may control the processing. . The input of the number of writing times information for which the increment is desired can be made from the keyboard of the personal computer 220 or the like. Further, the writing device 20 and the personal computer 220 may be integrally configured.
[0059]
The controller 216 of the writing device 20 may hold the identification number of the display device 10 that has performed the writing, the number of times of writing, and the like, and may transmit the identification number to the server 222 periodically or every fixed amount. Good. Even if the writing to the display device 10 is performed by the plurality of writing devices 20, the server 222 processes the information transmitted from the plurality of writing devices by the server 222, so that the server 222 It is possible to acquire the latest information of the display device 10 and manage the writing status of the display device 10. Thus, the manufacturer can grasp the status of the rented display device 10 and reflect the status in marketing, sales promotion, and the like.
[0060]
The present invention is not limited to performing the first embodiment, the second embodiment, and the third embodiment individually, but the first embodiment, the second embodiment, And the third embodiment can be arbitrarily combined.
[0061]
Hereinafter, an example of the arrangement of the display medium 102 and the memory 104, that is, the recording unit in the display device 10 will be described. As shown in FIG. 4, in the first arrangement example of the display device 10 of the present invention, the display medium 102 and the memory 104 can be arranged on the same plane of the substrate 103. FIG. 4 shows an example in which the memory 104 is arranged at the lower left of the display medium 102, but the present invention is not limited to this.
[0062]
As shown in FIG. 5, in the second arrangement example of the display device 10 of the present invention, the memory 104 is arranged on a surface different from the surface of the substrate 103 on which the display medium 102 is arranged. In FIG. 5, the memory 104 is arranged on the back surface of the surface on which the display medium 102 is arranged, but the present invention is not limited to this.
[0063]
As shown in FIGS. 6 and 7, in the third arrangement example of the display device 10 of the present invention, a part of the display medium 102 can be used as the memory 104. That is, the recording unit may be a part of the display medium. FIG. 6 shows an example in which the lower left portion of the display medium 102 is used as the memory 104. In FIG. 7, the number of times of writing is indicated by visible information, that is, a number that can be visually recognized. However, the present invention is not limited to this.
[0064]
As shown in FIG. 8, in the fourth arrangement example of the display device 10 of the present invention, a memory 104 can be arranged between the display medium 102 and the substrate 103. FIG. 6 shows an example in which the memory 104 is arranged at the lower right of the display medium 102, but the present invention is not limited to this.
[0065]
Here, the memory 104, that is, the recording unit may be a contact type or non-contact type IC chip as shown in FIG. The non-contact type IC chip has a memory circuit, a rectifier circuit, a signal separation circuit, and an antenna coil for electrically recording the number of writing times information as invisible information, that is, information that cannot be visually recognized. The access means for accessing the information on the number of times of writing transmits an electromagnetic wave carrying a signal to the antenna coil. The power induced in the antenna coil is rectified and used as a power source for the memory circuit and the signal separation circuit. The signal separation circuit separates the signal, decodes the signal, and accesses the information on the number of times of writing of the memory circuit.
[0066]
The memory 104, that is, the recording unit, may be a magnetic printing recording medium. As shown in FIG. 10, when the write count information is represented as visible information by a combination of predetermined alphanumeric characters and symbols, the write count information can be read by the OCR. As shown in FIG. 11, when the number-of-writes information is represented by a barcode that is visible information, the number-of-writes information can be read by a barcode reader.
[0067]
Further, the memory 104, that is, the recording unit is a nonvolatile semiconductor memory such as an EEPROM, a ferroelectric memory, a magnetic memory for recording information by magnetic printing, a magneto-optical memory, a phase change optical memory, a battery-backed DRAM, or the like. May be. The information recorded therein is invisible information that cannot be visually recognized and is recorded by electric, magnetic, or change of the shape or the composition of the substance. A known method such as a magnetic head, an optical head, a terminal connection, and a wireless connection can be used as a means for accessing the information recorded therein.
[0068]
In the present invention, the recording unit is not limited to a single type of memory, but may be, for example, an IC chip and a magnetic printing recording medium. In this case, for example, the access unit reads the information on the number of times of writing recorded on the IC chip, and the user can visually read the information on the number of times of writing recorded on the magnetic printing recording medium by characters or symbols. . As a result, the processing is performed quickly and the convenience for the user is improved. As described above, the write count information may be at least one of visible information and invisible information.
[0069]
As shown in FIG. 12, the display medium 102 of the present invention may be a simple matrix panel having pixels at the intersection of two orthogonal strip-shaped electrode groups. In the simple matrix panel, the strip electrode groups in the vertical direction and the horizontal direction are connected to the row driving circuit 502 and the column driving circuit 504, respectively. The strip-shaped electrode group, the row driving circuit 502, and the column driving circuit 504 constitute a writing unit, and the row driving circuit 502 and the column driving circuit 504 are controlled by the controller 106.
[0070]
As shown in FIG. 13, the display medium 102 of the present invention may be a heat-sensitive recordable memory display medium. In this case, the writing device 20 includes a pair of rollers 512 and 514 for transporting the display device 10, a thermal head 206 as a writing unit, a head 202 for reading the writing frequency information, and a head 204 for writing the writing frequency information. And The heads 202 and 204 constitute an access unit. When the memory 104 is a magnetic printing recording medium, the heads 202 and 204 are magnetic heads.
[0071]
The display medium 102 of the present invention may be an optical writing type display medium as shown in FIG. The optical writing type display medium includes a display layer 526 which shows an optical change by a voltage or a current, a photoconductive layer 528 whose electric resistance changes by light irradiation, substrates 522u and 522d sandwiching these, and the substrate 522. And a pair of electrodes 524.
[0072]
In this case, the writing device 20 includes a light image irradiation circuit 534 for irradiating an image to be written on the display medium 102, a voltage generation circuit 536 for applying a voltage to the display medium 102, and information on the number of times of writing in the memory 104. And an access circuit 532 for accessing the. Here, the light image irradiation circuit 534 and the voltage generation circuit 536 constitute a writing unit, and the access circuit 532 constitutes an access unit.
[0073]
Image writing on the optical writing type display medium is performed by (1) projecting and irradiating an image to the photoconductive layer 528 by the optical image irradiating circuit 534, and (2) applying a voltage pulse from the voltage applying circuit 536 between the electrode pair 524. It is done by applying. The electric resistance of the photoconductive layer 528 changes in accordance with the intensity of the projected / irradiated light, and the partial pressure on the display layer 526 changes, so that an image is written on the optical writing type display medium.
[0074]
As the electrode pair 524, a metal thin film such as Au, ITO (Indium Tin Oxide), SnO ₂ And a light-transmitting conductor such as an oxide conductor such as ZnO or a conductive polymer such as polypyrrole. The display layer 526 includes (a) a memory liquid crystal: for example, a smectic liquid crystal to which a dichroic dye is added, a cholesteric liquid crystal having selective reflection at a visible wavelength, a ferroelectric liquid crystal, a bistable nematic liquid crystal, and a memory. (B) a liquid in which colored charged particles dispersed in an insulating liquid are dispersed, (c) a charged fine particle powder, (d) an electrochromic material such as a conductive polymer or an oxide, ) A metal salt solution which is deposited / dissolved by an electrochemical reaction can be used.
[0075]
As the photoconductive layer 528, (a) an inorganic semiconductor material; a compound semiconductor such as amorphous silicon or ZnSe or CdS; (b) an organic semiconductor material; anthracene, polyvinyl carbazole, etc .; Complex of a charge generating material and a charge transporting material that causes charge transfer by an electric field; examples of the charge generating material include perylene-based, phthalocyanine-based, bisazo-based, dithiopitokeropyrrole-based, squalilium-based, azurenium-based, and thiapyrylium- Examples of the charge transport material such as a polycarbonate-based compound include, for example, trinitrofluorene-based, polyvinylcarbazole-based, oxadiazole-based, pyrarizone-based, hydrazone-based, stilbene-based, triphenylamine-based, triphenylmethane-based, and diamine-based compounds. , LiCl ₄ (D) composite forms, such as ionic conductive materials such as polyvinyl alcohol and polyethylene oxide to which is added, laminates, mixtures, microcapsules, and the like.
[0076]
Further, as the display medium 102 of the present invention, a system in which leuco dye is colored by heating and cooling, a system in which low organic molecules such as behenic acid are crystallized / non-crystallized by heating / cooling, and a method in which the liquid is dispersed in a liquid. A method that uses the magnetophoresis of magnetic particles, a method that uses electrophoresis of charged particles dispersed in a liquid, a method that uses orientation change of liquid crystal by heat or an electric field, and a method that uses a redox reaction of a conductive polymer or oxide A known memory display method such as a method using coloring and erasing and a method using deposition / dissolution of a metal by an oxidation-reduction reaction can be used.
[0077]
The writing unit is, for example, a thermal head or a laser scanning head when the display medium 102 is a thermal writing type, a magnetic head when the display medium 102 is a magnetic writing type, or a magnetic head when the display medium 102 is an optical writing type. It may be a laser scanning head, an LED head, an EL head, a liquid crystal shutter head, an electrostatic head in the case of an electric writing type, an ion flow head, or the like.
[0078]
In the case of an electric writing type, writing can be performed by sandwiching a display material between a pair of electrodes and applying a voltage. For example, as described above, a simple matrix panel in which the intersection of two orthogonal strip-shaped electrode groups is used as a pixel, or the display surface is divided into independent small pixels, and a thin film transistor, a thin film diode, An active matrix panel to which active elements such as MIM (Metal-Insulator-Metal) elements are connected can also be used.
[0079]
【The invention's effect】
As described above, the display medium of the present invention displays an image, and the recording unit records the number of times of writing indicating the number of times of writing the image on the display medium. Further, even when an image is written to a display device by a different writing device, the display device itself can hold writing frequency information indicating the number of times of writing to the display device.
[Brief description of the drawings]
FIG. 1 shows a configuration diagram of a display system according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating an operation of the first exemplary embodiment of the present invention.
FIG. 3 is a flowchart showing the operation of the second embodiment of the present invention.
FIG. 4 is a diagram showing an arrangement of a display medium and a memory according to the present invention.
FIG. 5 is a diagram showing an arrangement of a display medium and a memory according to the present invention.
FIG. 6 is a diagram showing an arrangement of a display medium and a memory according to the present invention.
FIG. 7 is a diagram showing an arrangement of a display medium and a memory according to the present invention.
FIG. 8 is a diagram showing an arrangement of a display medium and a memory according to the present invention.
FIG. 9 is a diagram showing types of memories of the present invention.
FIG. 10 is a diagram showing types of memories of the present invention.
FIG. 11 is a diagram showing types of memories of the present invention.
FIG. 12 is a diagram illustrating types of display media of the present invention.
FIG. 13 is a diagram showing types of display media of the present invention.
FIG. 14 is a diagram showing types of display media of the present invention.
FIG. 15 is a diagram illustrating an image displayed on a display medium according to the second embodiment of the present invention.
FIG. 16 is a diagram illustrating an image displayed on a display medium according to the second embodiment of the present invention.
FIG. 17 is a flowchart showing the operation of the third embodiment of the present invention.
[Explanation of symbols]
10 Display device
102 Display medium
104 memory
20 Writing device
216 Controller
30 Display system

Claims (16)

A display medium for displaying an image,
A recording unit for recording information on the number of times of writing indicating the number of times of writing an image on the display medium,
A display device having: The display device according to claim 1, wherein the display medium is a memory display medium. The display device according to claim 1, wherein the writing count information is at least one of visible information and invisible information. The display device according to claim 1, wherein the recording unit is a part of the display medium. The display device according to claim 1, wherein the display medium is an optical writing type display medium. An access unit that accesses the number-of-writes information recorded in the recording unit of the display device according to claim 1,
Writing means for writing an image on the display medium;
Control means for controlling the access means so as to change the write count information accessed by the access means when an image is written on the display medium by the writing means;
A writing device. 7. The writing apparatus according to claim 6, wherein the control unit controls the writing unit to change the condition for writing an image based on the information on the number of times of writing so as to write the image. A determination unit configured to determine whether to permit writing of an image to the display medium based on the information on the number of times of writing,
The control means controls the writing means so as not to write the specified image on the display medium when the determination means determines that writing of the image is not permitted,
The writing device according to claim 6. When the determination unit determines that the writing of the image is not permitted, the control unit writes a predetermined image to the display medium to notify that the writing of the instructed image is not permitted. 9. The writing apparatus according to claim 8, wherein said writing means is further controlled. The control unit further controls the writing unit so as to reduce the display quality of the image written on the display medium when the determination unit determines that writing of the image is not permitted. 10. The writing device according to 8 or 9. A determination unit configured to determine whether to permit writing of an image to the display medium based on the information on the number of times of writing,
When the determining unit determines that the writing of the image is not permitted, the control unit reduces the display image quality of the instructed image, and performs the writing of the instructed image on the display medium. Controlling writing means,
The writing device according to claim 6. The writing device according to any one of claims 6 to 11, wherein the display device is detachably connected. The writing device according to claim 6, further comprising an output unit configured to output the write count information to the outside. Further comprising input means for externally inputting new write count information;
The control unit controls the access unit to change the number-of-writes information recorded in the recording unit of the display device based on the new number-of-times information,
The writing device according to any one of claims 6 to 13. A display device according to any one of claims 1 to 5,
A writing device according to claim 13 or 14,
A server for inputting the number-of-writes information output from an output unit of the writing device;
A display system having: The display system according to claim 15, wherein the server outputs the new writing count information to the writing device.

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