JP2006146002A - Display recording medium and writing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display recording medium capable of displaying information without a power supply and a writing device that make it possible to easily confirm whether information is properly rewritten to the display recording medium in such a case. <P>SOLUTION: The display recording medium 2A which holds a written image without any power supply has an image write area 2c and a print confirmation display area 2e provided adjacently thereto, and the image writing device writes information thereto at the same time. After the information is written, an image having been rewritten is displayed in an image display area 2d, information indicating that the image display area 3d is rewritten is displayed in the printing confirmation display area 2e, and the display disappears a certain time later, so it can easily be confirmed whether the image is successfully rewritten. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display recording medium and a writing apparatus having a memory property capable of displaying written information without a power supply, and particularly when information is rewritten on a display recording medium capable of displaying information without a power supply. The present invention also relates to a display recording medium and a writing apparatus that can easily confirm whether or not the rewriting has been appropriately performed.

  In recent years, a display recording medium called a display recording medium or a digital paper having both the advantages of an electronic display and paper has attracted attention as a display recording medium, in addition to a paper medium and an electronic display device.

  Since this display recording medium has a memory property with respect to display, it is only necessary to apply writing energy by the image writing apparatus only when information is rewritten, and energy application for maintaining display is unnecessary. Therefore, after the information is written, only the display recording medium is separated from the image writing apparatus, and the information can be easily carried like a paper medium, stacked, arranged, or read by hand.

  As a display recording medium having the above memory properties, an optical writable display recording medium in which an image is memorized in a visible and erasable manner by light irradiation and voltage application, and an image in which an image is written on the display recording medium A writing device is known (see, for example, Patent Document 1).

  In the display recording medium described in Patent Document 1, a liquid crystal layer and a photoconductive layer whose resistance value is changed by light irradiation are laminated between a pair of transparent electrodes. Further, the image writing apparatus for writing an image on the display recording medium irradiates a two-dimensional light pattern from the liquid crystal panel through the two-dimensional microlens array so as to form an image on the photoconductive layer of the display recording medium, A resistance distribution based on the light pattern is generated in the photoconductive layer, a voltage is applied between the pair of transparent electrodes via the power receiving unit, and a partial pressure distribution based on the resistance distribution of the photoconductive layer is applied to the liquid crystal layer. An image corresponding to the pressure distribution is recorded on the liquid crystal layer.

  According to this optical writing type display recording medium image writing apparatus, printing can be performed by exposing the image information to a plane while applying a voltage to the entire pair of electrodes. In comparison, large-capacity image information can be written at high speed.

  However, unlike the normal printer that prints on paper, the above image writing apparatus has a process of overwriting other information on information that has already been written, so rewriting by overwriting is performed. There is a problem that it is impossible to confirm whether the original information remains without being rewritten without being rewritten.

  On the other hand, a storage medium that displays storage contents on a floppy (registered trademark) disk (hereinafter referred to as “FD”) and an FD driver that reads / writes data from / to the FD have been proposed (for example, Patent Documents). 2).

This storage medium is obtained by pasting a label sheet made of a thermoreversible recording material on an FD, and when the storage device unit of the FD drive stores new data on the FD, the printing device unit of the FD drive allows the label sheet to be printed. After erasing the print contents, the contents stored in the FD are printed on the label sheet. By looking at the content printed on the label sticker, it is possible to confirm whether the stored content has been rewritten.
JP 2001-301233 A ([0031] to [0043], FIGS. 1 and 2) JP 2000-195224 A ([0030] to [0038])

  However, according to the conventional storage medium, since the FD driver is required to view the stored contents, the recorded contents cannot be displayed without a power supply like a paper medium.

  Accordingly, an object of the present invention is to make it possible to easily confirm whether or not rewriting has been properly performed when information is rewritten on a display recording medium capable of displaying information without a power source. It is to provide a display recording medium and a writing device.

  In order to achieve the above object, the present invention provides a display recording medium comprising first and second display areas having different display times in which written information can be continuously displayed without a power source. To do.

  When information is written in the first and second display areas, the information in the other display area disappears within a certain time because the information in the display area with the shorter display time disappears before the other display area. You can see that it was rewritten.

  “Display time” refers to the time from when information is written until it disappears, but also includes the time until the information has not completely disappeared. One of the first and second display areas has a long display time of one day, several days, one month, several months, one year, or several years, and the other display area has several seconds, It is desirable to have a short display time of one minute, several minutes, one hour, or several hours.

  The first and second display regions preferably have a configuration in which information is written with the same type of energy such as electricity (electric field), heat, and light. Thereby, a display area can be manufactured easily. In this case, the constituent elements of the first and second display areas may be different.

  The first and second display areas may have common components, and display times may be different due to differences in characteristics of at least some of the common components. Thereby, a display area can be manufactured easily.

  The first and second display regions may include a pair of electrodes to which a voltage is applied, and a liquid crystal layer and a photoconductive layer that are stacked between the pair of electrodes. When a voltage is applied to a pair of electrodes and pattern light corresponding to an image signal is applied to the photoconductive layer, the resistance value of the photoconductive layer decreases due to light irradiation, the partial pressure of the liquid crystal layer increases, and light reflection occurs. Since the rate increases, an image due to a change in light reflectance is displayed.

  In the case of the optical writing type display recording medium as described above, the display time may be different due to different characteristics of the liquid crystal layer. In the case where the liquid crystal layer has a configuration in which cholesteric liquid crystal is sealed in microcapsules, the display time is different by varying the alignment control force in the microcapsules.

  The first and second display regions include a pair of electrodes to which a voltage is applied and particles having predetermined charging characteristics that move between the pair of electrodes in accordance with an electric field formed between the pair of electrodes by the application of the voltage. It is good also as a structure provided with the group. By applying a voltage to the pair of electrodes, an electric field is generated between the pair of electrodes, the particles move according to the direction of the electric field, and information is displayed by particles attached to one of the pair of electrodes. The

  The first and second display areas may have different display times due to the different charging characteristics of the particle groups.

  In addition to the above, as a display recording medium having a memory property, in addition to the above, a thermal recording medium using a leuco dye, a liquid crystal having a memory property typified by a ferroelectric liquid crystal, and an electric for switching a display by moving charged particles. An electrophoresis method, a particle rotation method in which charged particles are rotated to switch display, a magnetophoresis method in which particles are moved by magnetism, and display is switched may be used.

  The recording formats in the first and second display areas may be different or the same.

  It is preferable that the first and second display areas have a display area wider in the display area with the longer display time than the display area with the shorter display time. Thereby, a large amount of information can be written in the display area having a higher memory property.

  The first and second display areas may be provided on the same surface or different surfaces. For example, it may be provided on the front and back surfaces of the display recording medium.

  In order to achieve the above object, the present invention provides a writing apparatus for writing information to first and second display areas having different display times in which written information can be continuously displayed without a power source. A writing unit for writing image information to the display area having the longer display time of the first and second display areas and writing predetermined information indicating that the image information has been written to the shorter display area; Provided is a writing device characterized by comprising the above.

  When the writing unit of the writing device writes information in the first and second display areas of the display recording medium, the information in the display area with the shorter display time disappears before the other display area. It can be seen that the information in the other display area has been rewritten within a certain time.

  The writing unit writes information in the display area using writing energy such as electricity (electric field), heat, and light according to the recording format in the display area. At this time, it is preferable that the writing unit has a configuration in which information is written in the first and second display regions with the same type of energy such as electricity (electric field), heat, and light. Thereby, the structure of the writing part with respect to both display areas can be made into the same structure, and a display medium and a writing part can be manufactured easily.

  The writing unit may be configured to write the image information and the predetermined information at the same time, or may be configured to write the image information and the predetermined information before the display recording medium is ejected from the housing. In the display recording medium ejected from the housing, the information in the display area with the shorter display time disappears earlier than the other display area, so that the information in the other display area is rewritten. .

  The predetermined information may be a character, figure, or symbol indicating the end of writing, or may be the time when the image information is written in the display area having a longer display time. Further, specific color information may be written in the entire display area with a shorter display time.

  According to the present invention, when information is rewritten on a display recording medium capable of displaying information with no power supply, it can be easily confirmed whether or not the rewriting is appropriately performed.

[First embodiment]
(Image writing system configuration)
FIG. 1 shows an image writing system according to a first embodiment of the present invention. The image writing system 100 includes an image writing device 1 and an optical writing type display recording medium 2A that is loaded into the image writing device 1 and is written.

  The image writing apparatus 1 conveys the box-shaped housing 10, the writing unit 11 that writes an image to the display recording medium 2 </ b> A, and the display recording medium 2 </ b> A that is carried in from the outside of the housing 10 to the writing unit 11. A pair of conveying rollers 12A and 12B, a pair of pressing rollers 13A and 13B that press the display recording medium 2A against the conveying rollers 12A and 12B, springs 14A and 14B that apply an urging force to the pressing rollers 13A and 13B, and writing A pair of write voltage application electrodes 15 in contact with the pair of power receiving units of the display recording medium 2A positioned at the write position on the unit 11, and a write voltage for applying a write voltage to the write voltage application electrode 15 The generator 16, the controller 11 that controls the writing unit 11, the write voltage generator 16, and the rollers 12 </ b> A and 12 </ b> B, and the storage unit 18 that stores image information to be written on the display recording medium 2 </ b> A are provided. .

  The casing 10 has a carry-in port 10a for carrying the display recording medium 2A on the side surface, and a discharge port 10b for discharging the written display recording medium 2A on the other side surface facing the side surface. Have

  The writing unit 11 includes a display panel such as a liquid crystal display (LCD), a plasma display (PDP), an electroluminescence display (ELD), a fluorescent display tube display (VFD), and a field emission display (FED). When a liquid crystal display (LCD) is used for the display panel, a backlight using a white LED (light emitting diode) or a cold cathode tube is further provided.

  Control of the rotation and stop of the transport rollers 12A and 12B is performed by the control unit 17. The pressing rollers 13A and 13B press the conveying rollers 12A and 12B by the urging forces of the springs 14A and 14B with the display recording medium 2A interposed therebetween, and are driven.

  The write voltage application electrode 15 is urged downward by a pressing mechanism (not shown) when the image is rewritten, and comes into contact with the power receiving unit of the display recording medium 2A carried into the writing position.

  The write voltage generation unit 16 generates a voltage for writing to be applied to the write voltage application electrode 15 at the time of writing (rewriting) under the control of the control unit 17.

  The control unit 17 includes a CPU, a ROM (Read Only Memory) in which a program is stored, a RAM (Random Access Memory) that temporarily stores data, an interface circuit, and the like. Although not shown, an operation unit for the user to perform operations such as input setting is also connected.

  The storage unit 18 is configured using a terminal device using a disk such as a DVD, CD-R, or CD-RW, a storage device using a magnetic storage medium such as a hard disk, a semiconductor memory, or the like.

(Configuration of display recording medium)
FIG. 2 shows the surface of the display recording medium 2A. As shown in FIG. 2A, the display recording medium 2A is provided with a rectangular image display area 2d for displaying an image written by the writing unit 11 at the center of the surface 2a. A print confirmation display area 2e for displaying information indicating that the image in the image display area 2d has been rewritten is provided adjacent to the image display area 2d on the leading end side in the direction C. A pair of power receiving units 207 </ b> A and 207 </ b> B that receive a voltage from the write voltage application electrode 15 is provided on the surface 2 a near the side along the transport direction C.

  Depending on the configuration of the image writing apparatus 1, as shown in FIG. 2B, the print confirmation display area 2e can be provided on the opposite side compared to FIG. Further, as shown in FIG. Alternatively, it may be a rectangle, an ellipse, a star, or the like.

(Layer structure of display recording medium)
FIG. 3 shows a layer structure of the display recording medium 2A, and is a cross-sectional view taken along line AA of FIG. As shown in FIG. 3, the display recording medium 2A has an image writing area 2c facing the image display area 2d, and a printing confirmation writing area 2f facing the printing confirmation display area 2e. . The display recording medium 2A includes a pair of transparent substrates 201A and 201B made of PET (polyethylene terephthalate) films arranged opposite to each other, and a pair of ITO (indium tin oxide) provided inside the pair of substrates 201A and 201B. A transparent electrode 202A, 202B, a liquid crystal layer 203 which is provided inside the transparent electrode 202A and has a cholesteric liquid crystal whose reflectance (transmittance) changes according to the voltage applied to the transparent electrodes 202A, 202B, and writing pattern light 30 is formed so that the resistance value is reduced by irradiating the image writing region 2c, and is provided between the photoconductive layer 204 disposed inside the transparent electrode 202B, the liquid crystal layer 203, and the photoconductive layer 204. Light absorbing layer 205, extending portion 206 extending from transparent electrode 202B toward surface 2a, transparent electrode Comprising 202A, formed a pair of power receiving portion 207A so as to be connected to 202B, and 207B, substrate 201A, and a resin filler 208 filled to fill the inter-201B. The cholesteric liquid crystal of the liquid crystal layer 203 is sealed in the microcapsule 203a.

  The image display area 2d and the print confirmation display area 2e are composed of the common components as described above, but the liquid crystal layer 203 in the print confirmation display area 2e is more memory-friendly than the liquid crystal layer 203 in the image display area 2d. Is weakening. For example, the memory property is weaker than that of the image writing area 2c by increasing the alignment control force in the microcapsule 203a in the liquid crystal layer 203 in the print confirmation display area 2e. Thus, after the electric field is applied and the planar state is obtained, the planar state cannot be maintained by the action of the orientation control force of the inner wall of the capsule 203a, and the state is changed to the random state and gray display is obtained.

(Operation of image writing system)
Next, the operation of the image writing system 100 will be described with reference to FIGS. FIG. 4 shows a display example of the print confirmation display area 2e, and FIG. 5 shows a timing chart. In FIG. 5, D indicates an example of density change in the image display area 2d, and d indicates an example of density change in the print confirmation display area 2e.

(1) Before reaching time t0 Before reaching time t0 shown in FIG. 5, it is assumed that an image before writing (person image) is displayed in the image display area 2d of the display recording medium 2A. At this time, for example, white is displayed in the print confirmation display area 2e.

  The display recording medium 2A carried in from the carrying direction C manually or automatically from the carry-in entrance 10a is carried to the right in FIG. 1 by the rotation of the carrying rollers 12A and 12A under the control of the control unit 17, and the writing unit 11 is reached.

(2) Time t0
Next, at time t0 shown in FIG. 5, the control unit 17 sends a write command signal to the write unit 11 and the write voltage generation unit 16 to operate them, and to operate a drive mechanism (not shown). The pair of write voltage application electrodes 15 are brought into contact with the power receiving units 207A and 207B of the display recording medium 2A.

  Next, a voltage is applied from the write voltage generation unit 16 to the power receiving units 207A and 207B via the write voltage application electrode 15, and image data is read from the storage unit 18 and a write signal is sent to the write unit 11. To do. The writing unit 11 generates a writing pattern light 30 based on the writing signal, and irradiates the writing pattern light 30 to the image writing area 2c and the print confirmation writing area 2f on the back surface 2b of the display recording medium 2A. .

  In the display recording medium 2A, the writing pattern light 30 applied to the image writing area 2c from the back surface 2b sequentially passes through the substrate 201B, the transparent electrode 202B, the photoconductive layer 204, and the light absorption layer 205, and the liquid crystal layer 203. To reach.

  In the photoconductive layer 204, the resistance value of the portion irradiated with light is reduced, whereby the partial pressure of the liquid crystal layer 203 determined by the impedance ratio with the photoconductive layer 204 is increased, and the light reflectance in the liquid crystal layer 203 is increased. growing. Therefore, after the rewriting is completed and the display recording medium 2A is ejected from the housing 10, the writing pattern light 30 of the liquid crystal layer 203 is emitted when the illumination light 32 is applied to the surface 2a of the display recording medium 2A. The illuminated area appears white because the illumination light 32 is reflected because the reflectance is increased, and the illumination light 32 is transmitted through the liquid crystal layer 203 in the area where the writing pattern light 30 is not illuminated. The display light 31 that appears black because it is absorbed at 205 can be viewed as an image from the direction of the line of sight E. This image is held for a long time even after voltage application to the power receiving units 207A and 207B disappears.

  Simultaneously with writing to the image writing area 2c, a part of the writing pattern light 30 is also irradiated to the print confirmation writing area 2f, and for example, “printed” characters as shown in FIG. 4 are written in black. . In the print confirmation writing area 2f, not only characters but also a specific color such as white, black and red may be written in the entire area 2f, or a symbol, mark, design, logo, or the like may be written.

(3) Time t0 to t1
When the rewriting operation to the display recording medium 2A by the writing unit 11 is completed, the control unit 17 rotates the transport rollers 12A and 12B, sends the display recording medium 2A to the discharge port 10b, and discharges it outside the housing 10. At this time, at time t1 shown in FIG. 5, a discharge detection sensor (not shown) detects discharge of the display recording medium 2A, and sends a detection signal to the control unit 17. When there is a display recording medium 2A to be written, the control unit 17 carries the writing control by conveying the display recording medium 2A to the writing unit 11 in the housing 10.

(4) Time t1 to t2
When the rewritten display recording medium 2A is normally rewritten, the contents written in the print confirmation writing area 2f are displayed in the print confirmation display area 2e. From the presence / absence of the display in the print confirmation display area 2e, it can be immediately known that the display recording medium 2A has been normally rewritten. The rewritten image (landscape image) is displayed in the image display area 2d of the display recording medium 2A during the time t1 to t2 shown in FIG. 5, and the print confirmation display area 2e is displayed as “ “Printed” is displayed.

(5) After time t2 This display content further decreases in density after time t2, and disappears completely at time t3.
The density ds of the print confirmation display area 2e at time t2 indicates the lowest density at which the characters “printed” can be recognized. That is, the time t1 to t2 is the print confirmation possible period.

(Effects of the first embodiment)
According to the first embodiment, it is easily confirmed whether or not the image display area 2d has been normally rewritten within a predetermined time from the change in the display state of the print confirmation display area 2e of the display recording medium 2A. can do. Further, the image display area 2d and the print confirmation display area 2e of the display recording medium 2A are composed of common components and can be rewritten by the same type of energy, so that the display recording medium 2A and the image writing device 1 are easily manufactured. be able to.

[Second Embodiment]
FIG. 6 is a diagram showing an example of a print confirmation display area according to the second embodiment of the present invention. In the second embodiment, in the first embodiment, the image writing apparatus 1 has a clock function, and the writing unit 11 is formed on the surface of the display recording medium 2A as in FIG. The time when the image is written in the image display area 2d is written in the print confirmation display area 2e provided in the above, and the other configuration is the same as in the first embodiment. According to this configuration, the rewriting time can be accurately recognized by displaying the writing time. The writing time is a broad concept including the writing date.

[Third embodiment]
(Configuration of display recording medium)
FIG. 7 shows a display recording medium according to the third embodiment of the present invention. This display recording medium 2B is the same as the display recording medium 2A of the first embodiment shown in FIG. 3, except that the light absorption layer 205 is disposed inside the transparent electrode 202B, and between the liquid crystal layer 203 and the photoconductive layer 204. In addition, an isolation layer 209 is added, and a print confirmation writing display area 2g serving as both a print confirmation display area 2e and a print confirmation writing area 2f is provided. The contents displayed in the print confirmation / writing display area 2g are the same as those in the first embodiment. The image writing apparatus 1 used for rewriting the display recording medium 2B is as shown in FIG.

  In this display recording medium 2B, the writing pattern light 30 is irradiated from the surface 2a side to the image writing display area 2h serving as the image writing area 2c and the image display area 2d, and a predetermined voltage is applied to the power receiving units 207A and 207B. Is applied from the writing unit 11 to write an image. The written image can be viewed from the direction of the line of sight E shown in FIG. 7 after being ejected from the image writing device 1.

(Write operation to display recording medium)
The display recording medium 2B carried in manually or automatically from the carry-in entrance 10a is conveyed onto the writing unit 11 and then read out from the storage unit 18 by the operations of the writing unit 11 and the write voltage generating unit 16. The image is rewritten based on the above. The writing unit 11 irradiates the writing pattern light 30 to the image writing display area 2h and the print confirmation writing display area 2g of the display recording medium 2B.

  The writing pattern light 30 irradiated to the image writing display area 2h sequentially passes through the substrate 201A, the transparent electrode 202A, the liquid crystal layer 203, and the isolation layer 209, and irradiates the photoconductive layer 204.

  In the photoconductive layer 204, the resistance value of the portion irradiated with light is reduced, whereby the partial pressure of the liquid crystal layer 203 determined by the impedance ratio with the photoconductive layer 204 is increased, and the light reflectance in the liquid crystal layer 203 is increased. growing. Therefore, when the image writing display area 2h of the display recording medium 2B is viewed from the surface 2a side, the area irradiated with light is reflected by the liquid crystal layer 203 and appears white, and the area not irradiated with light is displayed in the liquid crystal layer 203. And appears black because it is absorbed by the light absorption layer 205. As a result, an image that can be viewed as a visible image is recorded. This image is held for a long time even after voltage application to the power receiving units 207A and 207B disappears.

  At the same time, the writing pattern light 30 is also applied to the print confirmation writing display area 2g. For example, the characters “printed” shown in FIG. 4 are written in the print confirmation writing display area 2g.

  When the rewriting operation by the writing unit 11 is completed and the display recording medium 2B discharged from the discharge port 10b is normally rewritten, the characters “printed” written in the print confirmation writing display area 2g are displayed. It is displayed in the print confirmation writing display area 2g. From the presence / absence of display in the print confirmation / write display area 2g, it can be immediately known that the display recording medium 2B has been rewritten normally. The display in the print confirmation writing display area 2g disappears after a certain time (for example, several minutes) has passed.

(Effect of the third embodiment)
According to the third embodiment, the display state of the print confirmation writing display area 2g of the display recording medium 2B is also applied to the display recording medium 2B having the same line of sight E as the direction of the writing pattern light 30. From the change, it can be easily confirmed whether or not the image writing display area 2h has been normally rewritten within a predetermined time. Further, the image writing display area 2h and the print confirmation writing display area 2g of the display recording medium 2B are composed of common components and can be rewritten by the same type of energy, so that the display recording medium 2B and the image writing apparatus 1 can be rewritten. It can be manufactured easily.

[Fourth embodiment]
(Configuration of image writing system)
FIG. 8 shows an image writing system according to the fourth embodiment of the present invention. The image writing system 100 includes an image writing device 1 and a display recording medium 2C using a toner method.

  In addition to the control unit 17 and the storage unit 18 shown in the first embodiment, the image writing device 1 includes an initialization voltage generating unit 19a used when initializing the display recording medium 2C and a particle color used when writing. And a write voltage generator 19 having a display voltage generator 19b. The write voltage generator 19 applies a predetermined pulse voltage to the scan electrodes of the display recording medium 2C in order by a built-in pulse power circuit under the control of the controller 17. Here, the control unit 17, the storage unit 18, and the write voltage generation unit 19 form a write unit.

(Layer structure of display recording medium)
The display recording medium 2C scans a pair of transparent substrates 301A and 301B disposed at a predetermined interval, a plurality of scanning electrodes 302 disposed at a predetermined interval inside the substrate 301A, and the inside of the substrate 301B. A plurality of data electrodes 303 disposed orthogonal to the electrodes 302, a pair of dielectric layers 304A and 304B made of polycarbonate or the like disposed inside the scan electrodes 302 and the data electrodes 303, and a dielectric layer 304A 304B, a plurality of partition members 306 made of a thermosetting resin or the like for forming a plurality of cells 305 by being arranged at regular intervals, and white particles 307A and black particles 307B enclosed in the respective cells 305. With.

  Similarly to the display recording medium 2B, the display recording medium 2C has a print confirmation display area 2e in addition to the image display area 2d. In this print confirmation display area 2e, one scanning electrode 302a and one or a plurality of data electrodes 303 are interposed, and the formation location is the same as the print confirmation display area 2e of FIG.

  In the print confirmation display area 2e, the particles 307A and 307B enclosed in the cell 305 are selectively enclosed with a charge amount lower than that of the cell 305 in the image display area 2d, or the print confirmation writing is performed. The conductivity of the inner wall of the pixel in the display area 2g is made higher than that in the normal area (usually an insulator). Thereby, the characteristic that the adhesion force of the particles 307A and 307B to the inner wall is reduced is obtained, and the separation of the black and white particles 307A and 307B is broken, so that the display of the print confirmation display area 2e can be made, for example, gray. This display disappears after a certain period of time.

  The white particles 307A are, for example, spherical particles of titanium oxide-containing crosslinked polymethylmethacrylate having a volume average particle size of 20 μm (classified as Sekisui Chemicals Co., Ltd. Techpolymer MBX-20-White) in 100 parts by weight of isopropyltrimethoxysilane. It can be obtained by externally adding 0.4 parts by weight of the treated titania fine powder.

  As the black particles 307B, for example, spherical fine particles of carbon-containing crosslinked polymethyl methacrylate having a volume average particle diameter of 20 μm (classified by Sekisui Plastics Co., Ltd. Techpolymer MBX-20-Black) can be used.

(Operation of image writing system)
Next, the operation of the image writing system 100 will be described with reference to FIG. First, when the power is turned on, power is supplied to the write voltage generation unit 19, the control unit 17, and the storage unit 18.

  When image writing is performed, the display recording medium 2C is initialized by the controller 17 and the initialization voltage generator 19a of the write voltage generator 19. In this initialization, for example, an alternating voltage of ± 200 V from 100 Hz to 10 kHz is simultaneously applied to the scanning electrode 302 and the data electrode 303 to attach the white particles 307A to one substrate side and the black particles 307B to the other substrate side. Used to adhere to.

  Next, the control unit 17 reads image data from the storage unit 18 and controls the write voltage generation unit 19 to execute image display processing. First, the voltage corresponding to the image data for rewriting is applied from the particle color display voltage generator 19b to the first data electrode 303 and the first scan electrode 302. As for this voltage, for example, a voltage of 0 V is applied to the scanning electrode 11 during scanning and +70 V is applied during non-scanning. Further, for example, a voltage of 0 V is applied to the data electrode 303 when displaying white, and a voltage of +140 V is applied when displaying black.

  At this time, the white particles 307A and the black particles 307B are charged to different polarities due to frictional charging. For example, the white particles 307A are negatively charged and the black particles 307B are positively charged. In this state, when a voltage is applied to the scanning electrode 302 and the data electrode 303 based on the image data, the negatively charged white particles 307A move to the data electrode 303 side to which the positive voltage is applied and move to the dielectric layer 304B. The positively charged black particles 307B attached to the inner surface adhere to the inner surface of the dielectric layer 304A on the scanning electrode 302 side.

  When scanning of the first scan electrode 302 and the data electrode 303 is completed, a voltage corresponding to the image data is then applied from the particle color display voltage generator 19b to the second scan electrode 302 and the data electrode 303. . As a result, a black and white image is formed on the second scanning electrode 302 side.

  When all scanning of the scanning electrode 302 and the data electrode 303 is completed, a monochrome image for one sheet is displayed on the display recording medium 2C. In this monochrome image, when the illumination light 32 is irradiated, the display light 31 can be seen from the direction of the line of sight E through the substrate 301A.

  The scanning electrode 302a and one or more data electrodes 303 are interposed in the print confirmation display area 2e. Accordingly, predetermined writing is also performed in the print confirmation display area 2e in conjunction with the writing in the image display area 2d.

  After the rewriting operation to the display recording medium 2C is completed, if the display is displayed in the print confirmation display area 2e by looking at the display written in the print confirmation display area 2e, the display recording medium 2C is normally rewritten. You can immediately know what happened. This display disappears after a certain period of time.

(Effect of the fourth embodiment)
According to the fourth embodiment, in the toner-type display recording medium 2C, the image display area 2d is normally rewritten within a predetermined time from the change in the display state of the print confirmation display area 2e of the display recording medium 2C. It is possible to easily confirm whether or not Further, the image display area 2d and the print confirmation display area 2e of the display recording medium 2C are composed of common components and can be rewritten by the same type of energy, so that the display recording medium 2C and the image writing device 1 are easily manufactured. be able to.

[Other embodiments]
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the constituent elements of the respective embodiments can be arbitrarily combined within a range not changing the gist thereof.

  Further, the display of the print confirmation display area 2e is not limited to the display disappearing. For example, the color may change.

  Furthermore, it is desirable that the time until the display of the print confirmation display area 2e disappears can be adjusted depending on the application, but as a general application, it is sufficient if the display disappears in about several minutes.

1 is a configuration diagram showing an image writing system according to a first embodiment of the present invention. 1 shows the surface of the display recording medium of FIG. 1, (a) is a plan view of a configuration in which a print confirmation display area is provided on the same side as the power receiving unit, and (b) is a print confirmation display area provided on the opposite side of (a). FIG. 6C is a plan view showing another example of the shape of the print confirmation display area. It is sectional drawing of the AA line of the display recording medium of FIG. It is a top view which shows the example of a display of the print confirmation display area which concerns on the 1st Embodiment of this invention. 3 is a timing chart according to the first embodiment of the present invention. It is a top view which shows the example of a display of the print confirmation display area which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the display recording medium which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the image writing system which concerns on the 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image writing apparatus 2A, 2B, 2C Display recording medium 2a Front surface 2b Back surface 2c Image writing area 2d Image display area 2e Printing confirmation display area 2f Printing confirmation writing area 2g Printing confirmation writing display area 2h Image writing display area 2g Printing Confirmation Writing Display Area 10 Housing 10a Carry-in Port 10b Discharge Port 11 Writing Port 11 Scanning Electrodes 12A, 12B Transport Rollers 13A, 13B Pressing Rollers 14A, 14B Spring 15 Writing Voltage Applying Electrode 16 Writing Voltage Generating Portion 16a Initialization voltage generation unit 16b Particle color display voltage generation unit 17 Control unit 18 Storage unit 19 Write voltage generation unit 30 Write pattern light 31 Display light 32 Illumination light 100 Image writing system 201A, 201B Substrate 202A, 202B Transparent Electrode 203 Liquid crystal layer 203a Microcapsule 204 Photoconductive layer 205 Light absorption layer 206 Extension part 207 A, 207B Power receiving unit 208 Resin filling unit 209 Isolation layer 301A, 301B Substrate 302, 302a Scan electrode 303 Data electrode 304A, 304B Dielectric layer 305 Cell 306 Partition member 307A White particle 307B Black particle C Transport direction E Line of sight

Claims (18)

  A display recording medium comprising first and second display areas having different display times in which written information can be continuously displayed without a power source.   The display recording medium according to claim 1, wherein the information is written in the first and second display areas with the same type of energy.   The said 1st and 2nd display area | region has a common component, The said display time differs because the characteristic of at least one component is different among the said common components. The display recording medium according to 1.   The first and second display regions each include a pair of electrodes to which a voltage is applied, and a liquid crystal layer and a photoconductive layer that are stacked between the pair of electrodes. The display recording medium according to 1.   5. The display recording medium according to claim 4, wherein the first and second display areas have different display times due to different characteristics of the liquid crystal layer. 6. The liquid crystal layer has a configuration in which a cholestic liquid crystal is sealed in a microcapsule,
5. The display recording medium according to claim 4, wherein the first and second display areas have different display times due to different alignment control forces in the microcapsules of the liquid crystal layer.   The first and second display areas have a pair of electrodes to which a voltage is applied and a predetermined charging that moves between the pair of electrodes in accordance with an electric field formed between the pair of electrodes by the application of the voltage. The display recording medium according to claim 1, further comprising a particle group having characteristics.   8. The display recording medium according to claim 7, wherein the first and second display areas have different display times due to different charging strengths of the particle groups. 9.   2. The display recording medium according to claim 1, wherein the first and second display areas have a display area wider in the display area with the longer display time than the display area with the shorter display time.   The display recording medium according to claim 1, wherein the first and second display areas are provided on the same surface.   The display recording medium according to claim 1, wherein the first and second display areas are provided on different surfaces. A writing device for writing information to first and second display areas having different display times in which written information can be continuously displayed without a power source,
Writing that writes image information to the display area with the longer display time of the first and second display areas and writes predetermined information indicating that the image information has been written to the display area with the shorter display time A writing device comprising a section.   13. The writing apparatus according to claim 12, wherein the writing unit writes the information with the same energy in the first and second display areas.   The writing device according to claim 12, wherein the writing unit writes the image information and the predetermined information simultaneously.   13. The writing apparatus according to claim 12, wherein the writing unit writes the image information and the predetermined information before the display recording medium is ejected from the housing.   13. The writing apparatus according to claim 12, wherein the predetermined information is a character, a figure, or a symbol indicating completion of writing.   13. The writing apparatus according to claim 12, wherein the predetermined information is a time when the image information is written in a display area having a longer display time.   13. The writing apparatus according to claim 12, wherein the predetermined information is specific color information written in the entire display area with the shorter display time.