JP2005321739A - Book type display recording medium and image writing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a book type display recording medium which is improved in handling property and can prevent related display recording media from scattering, and to provide an image writing device which realizes fast writing in a book type display recording medium. <P>SOLUTION: The book type display recording medium 20 comprises electronic paper 10 as a display recording medium in a plurality of sheets having the identical structure, and a joint portion 12 which links the electronic paper 10 in a gutter to be spread like a book. The electronic paper 10 can display images on either surface and has memory property which can hold images without electric power. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a book-type display recording medium in which a plurality of display recording media having rewritable and memory characteristics are made into a book type, and an image writing apparatus for writing an image on the book-type display recording medium.

  In recent years, a display recording medium called an electronic paper or a digital paper having both 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 give energy for writing by a driving device or an external information writing device only when information is rewritten, and energy for maintaining display is sufficient. Application is not required. Therefore, after the information is written, only the display recording medium can be taken out from the image writing apparatus and can be easily carried like a paper medium, stacked, arranged, or read by hand.

  As the display recording medium having the above memory property, an optical writable display recording medium in which an image is memorized in a visible and erasable manner by applying voltage and irradiating light, and an image is written on the display recording medium. An image writing apparatus is known (for example, see 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 apparatus for writing an image on the display recording medium has the display recording medium conveyed from the storage unit in close contact with the surface of the liquid crystal light output device, and in this state, the liquid crystal light output illuminated from the back by the backlight. The image is displayed on the device and the image light is irradiated to the photoconductive layer of the display recording medium, a resistance distribution based on the photo pattern is generated in the photoconductive layer, a voltage is applied between the transparent electrodes, and the photoconductive layer A partial pressure distribution based on the resistance distribution is applied to the liquid crystal layer, and an image corresponding to the partial pressure distribution is recorded on the liquid crystal layer.
JP 2001-301233 A ([0044] to [0047] and FIG. 4)

  However, according to the conventional display recording medium, image writing is basically performed on a single sheet basis. For this reason, when the number of written sheets becomes plural, a great deal of time is taken.

  In the rewritable display recording medium as described above, it has been conventionally considered that image writing is performed in units of one sheet. However, a book type is formed by combining electronic paper so as to be spread like a book binding margin. In addition, it is conceivable to improve usability and to further prevent the related display recording medium from falling apart.

  When writing an image on such a book-type display recording medium, writing is performed in units of one sheet, or the two sides are collectively performed like a bank passbook. However, when electronic paper is used as a method of carrying a bankbook by sliding it like an automatic cash payment machine in a bank, the soft surface is easily rubbed during transportation and takes time to write. There is an inconvenience.

  Therefore, an object of the present invention is to make a plurality of display recording media having rewritable and memory properties into a book type, thereby improving the usability and preventing the related display recording media from being separated. It is to provide a recording medium.

  Another object of the present invention is to provide an image writing apparatus capable of speeding up writing to a book type display recording medium.

  In order to achieve the above object, according to a first aspect of the present invention, there are provided a plurality of display recording media capable of visually displaying images on both sides and capable of holding the images without a power source, and a side of the plurality of display recording media. Provided is a book-type display recording medium comprising a holding unit that is movably held.

  According to a second aspect of the present invention, in order to achieve the above object, in the image writing apparatus for a book type display recording medium in which one side of each of the plurality of display recording media is rotatably held, the plurality of display recording media are sequentially paged. There is provided an image writing apparatus comprising: a page feeding means for performing writing; and a writing means for writing an image on both surfaces of the display recording medium opened by the page feeding means.

  According to the book type display recording medium of the present invention, since one side of the plurality of display recording media is rotatably held, the usability can be improved and related display recording media are separated. Can be prevented.

  According to the image writing apparatus of the present invention, since a book type display recording medium can be automatically turned and written, writing can be performed simultaneously on both sides of one or two sheets, thereby speeding up writing. Can be achieved.

[First Embodiment]
FIG. 1 is a front view of a book-type display recording medium according to the first embodiment of the present invention, and FIG. 2 is a right side view thereof. 3A and 3B show details of the plane and the joint portion of the book-type display recording medium of FIG. 1, wherein FIG. 3A is a plan view, FIG. 3B is a sectional view taken along line AA in FIG. It is a BB line sectional view of). In FIGS. 3B and 3C, the electronic paper 10 is illustrated in three sheets, and the others are not illustrated.

(Configuration of book-type display recording medium)
The book-type display recording medium 20 is composed of a plurality of (for example, five) display papers having the same structure, and the electronic papers 10 are connected so that the binding margin portion can be spread like a book. The joint portion 12 is configured so that the display surfaces of the two electronic papers 10 are in the user's field of view in the spread state.

(Configuration of electronic paper)
The electronic paper 10 includes a display recording unit 11 shown in FIG. 3A in which information can be rewritten, and a cylindrical engagement formed on one side of the display recording unit 11 such as one of the short sides. 10 A of joining parts and the four slits 13 provided with predetermined spacing in 1 row along this engaging part 10A are provided. The four slits 13 may be two slits 13 in which two adjacent ones are connected, or may be one slit in which four are connected.

(Composition of joint part)
As shown in FIGS. 3B and 3C, the joint portion 12 includes a pair of fitting portions 12a having a substantially C-shaped cross-sectional shape in which an opening 12c is partially formed, and the pair of fitting portions. And a plate-like connecting portion 12b for connecting 12a. One of the pair of fitting portions 12 a is fitted into the engaging portion 10 </ b> A of the electronic paper 10, and the other is fitted into the engaging portion 10 </ b> A of another adjacent electronic paper 10. The book type display recording medium 20 is formed by connecting the required number of electronic papers 10.

(Layer structure of electronic paper display / recording section)
FIG. 4 shows a cross section taken along line CC in the display recording unit 11 of FIG. The display recording unit 11 has a thin rectangular shape, and a pair of substrates 101A and 101B made of PET (polyethylene terephthalate) films arranged in parallel at a predetermined interval, and ITO disposed inside each of the substrates 101A and 101B. A pair of transparent electrodes 102A and 102B made of (indium tin oxide) and a liquid crystal having a memory property that is provided inside the transparent electrodes 102A and 102B and whose reflectance (transmittance) changes according to an applied voltage, for example, The liquid crystal layers 103A and 103B made of cholesteric liquid crystal, the isolation layers 104A and 104B provided inside each of the liquid crystal layers 103A and 103B, and the write pattern light 70 provided inside each of the isolation layers 104A and 104B. The photoconductive layer 10 whose resistance value is reduced by irradiation of the write pattern light 71. Comprises 106, a common electrode 107 provided in the middle of the photoconductive layer 105, 106, the light absorbing layer 108A provided on both sides of the common electrode 107, and 108B.

  The photoconductive layer 105 includes two charge generation layers 105a and 105c and a charge transport layer 105b provided therebetween. Similarly, the photoconductive layer 106 includes two charge generation layers 106a, 106c and a charge transport layer 106b provided therebetween. The charge generation layers 105a and 105c are stacked on both sides of the charge transport layer 105b. Similarly, the charge generation layers 106a and 106c are stacked on both sides of the charge transport layer 106b, so that the liquid crystal layers 103A and 103B are formed. AC voltage can be applied, deterioration of the liquid crystal layers 103A and 103B can be suppressed, the drive voltage can be lowered, and the life of the display recording medium section 11 can be increased.

  The common electrode 107 is formed of a thin film such as a copper foil. The common electrode 107 is used as the other electrode for one or both of the transparent electrodes 102A and 102B.

  Although not shown in FIG. 4, the transparent electrodes 102 </ b> A and 102 </ b> B and the common electrode 107 have a power receiving unit for receiving voltage supply from the image writing device, either the front surface 11 a or the back surface 11 b of the electronic paper 10. It is provided on both the front surface 11a and the back surface 11b, or on the end surface.

(Write operation to display / recording section)
When writing to the display recording unit 11, a predetermined voltage is applied between the transparent electrode 102B and the transparent electrode 102A or the common electrode 107. By applying a voltage to one of the transparent electrode 102A and the common electrode 107, an image can be written on the upper side (front surface 11a) or the lower side (back surface 11b) with the common electrode 107 as a boundary.

  For example, when writing an image on the surface 11a, a voltage is applied between the transparent electrode 102A and the common electrode 107, and the write pattern light 70 is photoconductive through the substrate 101A, the transparent electrode 102A, the liquid crystal layer 103A, and the isolation layer 104A. Layer 105 is irradiated. The resistance value of the photoconductive layer 105 is reduced by the irradiation of the write pattern light 70, thereby increasing the partial pressure of the liquid crystal layer 103 </ b> A determined by the impedance ratio with the photoconductive layer 105, and a voltage exceeding a certain threshold value is applied. As a result, the liquid crystal layer 103A maintains a state of high light reflectance. Accordingly, when the display recording unit 11 is viewed from the line of sight E1, the region irradiated with the writing pattern light 70 is reflected by the liquid crystal layer 103A upon receiving the illumination light 72 and appears white as the display light 74.

  On the contrary, in a region where the write pattern light 70 is not irradiated, the resistance value of the photoconductive layer 105 is increased, and a voltage not exceeding the threshold is applied to the liquid crystal layer 103A, so that the liquid crystal layer 103A emits light. Holds the state of transmission. Since the light that has passed through the liquid crystal layer 103A is absorbed by the light absorption layer 108A, the region that is not irradiated with the write pattern light 70 appears black.

  When writing an image on the back surface 11b, a voltage is applied to the transparent electrode 102B and the common electrode 107, and the write pattern light 71 passes through the substrate 101B, the transparent electrode 102B, the liquid crystal layer 103B, and the isolation layer 104B. Is irradiated. The resistance value of the photoconductive layer 106 is reduced by the irradiation of the write pattern light 71, thereby increasing the partial pressure of the liquid crystal layer 103 </ b> B determined by the impedance ratio with the photoconductive layer 106, and a voltage exceeding a certain threshold value is applied. As a result, the liquid crystal layer 103B maintains a high light reflectivity. Therefore, when the display recording unit 11 is viewed from the line of sight E <b> 2, the region irradiated with the writing pattern light 71 receives the illumination light 73 and is reflected by the liquid crystal layer 103 </ b> B and appears white as the display light 75.

  On the contrary, in the region where the write pattern light 71 is not irradiated, the resistance value of the photoconductive layer 106 is increased, a voltage not exceeding the threshold is applied to the liquid crystal layer 103B, and the liquid crystal layer 103B is in a state of transmitting light. Hold. Since the light that has passed through the liquid crystal layer 103B is absorbed by the light absorption layer 108B, the region that is not irradiated with the write pattern light 71 appears black.

  In the above description, the display recording unit 11 is written on each side, but writing on both sides is also possible. In this case, a predetermined voltage is applied between the transparent electrodes 102 </ b> A and 102 </ b> B and the common electrode 107, and write pattern lights 70 and 71 are simultaneously irradiated on the front surface 11 a and the back surface 11 b of the display recording unit 11. As a result, the writing time can be reduced to about ½ compared to the case where writing is performed for each side.

  In addition to the layer configuration shown in FIG. 4, the display recording unit 11 may have a configuration in which an ITO layer and a light shielding layer (light absorption layer) are provided instead of the common electrode 107 and the light absorption layers 108A and 108B. . Even with this layer structure, the display recording unit 11 shown in FIG. 4 can have the same thickness and flexibility, and the image once written can be seen even without a power source. A book-type display recording medium 20 can be configured. The common electrode 107 may be divided into an electrode on the photoconductive layer 105 side and an electrode on the photoconductive layer 106 side.

(Assembly method of book type display recording medium)
Next, an assembling method of the book type display recording medium 20 will be described with reference to FIGS. As shown in FIGS. 1 and 2, the electronic papers 10 are arranged so as to overlap each other in the vertical direction via two joint portions 12 to form one book type display recording medium 20. The joint portions 12 are attached to every other slit 13 and are alternately attached two by two in the thickness direction.

  For example, when four electronic papers 10 are connected to form a book-type display recording medium 20, it is desired to add one electronic paper 10 '(shown by dotted lines) to this as shown in FIG. . In this case, as shown in FIG. 2, one fitting portion 12a of the two joint portions 12 is connected to the engaging portion 10A of the uppermost electronic paper 10 among the four electronic papers 10 that have already formed a book. When the engaging portion 10A of the uppermost electronic paper 10 is engaged with the other engaging portion 12a, the electronic paper 10 'is connected to the uppermost electronic paper 10 in a set of four sheets via the joint portion 12. Is done. Next, when the electronic paper 10 'is tilted in the arrow direction to a horizontal position, the five electronic papers 10 are in a closed book state, and a set of five book-type display recording media 20 is formed. The lower four plates are also connected by the joint portion 12 as described above. In FIGS. 1 and 2, the set of five sheets is used, but any number can be connected.

(Effects of the first embodiment)
According to the book type display recording medium of the first embodiment, the following effects can be obtained.
(A) Since the electronic paper 10 can be connected to any number of sheets by fitting the engaging portion 10A and the joint portion 12, the electronic paper 10 can form a book. As a result, usability can be improved and the related display recording medium can be prevented from being separated.
(B) When the fitting portion 12a of the joint portion 12 is fitted to the engaging portion 10A, the tip of the fitting portion 12a is rotated over an angle exceeding 300 ° because the escape path is formed by the slit 13 Can be made.

[Second Embodiment]
(Configuration of image writing device)
FIG. 5 is a front view showing an image writing apparatus according to the second embodiment of the present invention. The present embodiment is an image writing apparatus for writing to the book type display recording medium 20 of the first embodiment.

  The image writing device 30 raises the electronic paper 10 by a predetermined distance for each writing in a state where the book-type display recording medium 20 configured to bind the five electronic papers 10 and the electronic paper 10 before writing are placed. The first lifter 31 to be driven, the first air cylinder 32 serving as a drive source for the first lifter 31, and the electronic paper 10 for which writing has been completed are placed, and the first lifter 31 is moved upward. The second lifter 33 that is lowered by the same height, the second air cylinder 34 that is the driving source of the second lifter 33, and the writing that performs exposure on the two electronic papers 10 and 10 'in the spread state And a paging unit 36 for turning one sheet of the electronic paper 10 each time writing is sequentially performed on the book-type display recording medium 20. Here, the first and second lifters 31 and 33, the first and second air cylinders 32 and 34, and the paging portion 36 constitute page feeding means.

  FIG. 6 shows details of the paging unit 36. The paging portion 36 has a hexagonal column shape, and has a drive shaft 36A that is configured to rotate forward and backward while rotating at an angle of 180 °. The tip shape of the drive shaft 36A is not limited to a hexagon, and may be a quadrangular shape or the like, or a shape formed by a combination of a round bar and a protrusion.

  Corresponding to the drive shaft 36A, a hexagonal hole 10B is formed on the side surface of the engaging portion 10A of the electronic paper 10, and the drive shaft 36A can be fitted into the hole 10B.

(Operation of Second Embodiment)
The operation of the image writing apparatus will be described with reference to FIG. FIG. 7 shows a progress state of paging accompanying writing to the electronic paper 10 of the image writing apparatus of FIG. Here, it is assumed that the book-type display recording medium 20 includes five pieces of electronic paper 10 as shown in FIG. Writing is performed on each surface of the uppermost two electronic papers 10 for the first time, and thereafter, writing is performed in units of two surfaces every time one electronic paper 10 is turned.

  The book type display recording medium 20 is set in the first lifter 31 in a closed state. Next, the first lifter 31 is driven by a control unit (not shown) and ascends until the upper surface of the book type display recording medium 20 reaches the writing position. Next, the control unit drives the paging unit 36 to advance the drive shaft 36A (in the direction of arrow F) as shown in FIG. In this process, the drive shaft 36A is fitted into the hole 10B of the engaging portion 10A of the uppermost electronic paper 10. Next, the control unit rotates the drive shaft 36A of the paging unit 36 by 180 ° in the rotation direction D side of FIG. 6 and simultaneously drives the first and second air cylinders 32 and 34 to move the first lifter 31. At the same time as raising, the second lifter 33 is lowered.

  As a result of this cooperative operation, as shown in FIG. 5, the uppermost electronic paper 10 on the first lifter 31 is rotated by 180 ° to be placed on the second lifter 33 as the electronic paper 10 ′. At this time, since the first lifter 31 and the second lifter 33 are driven simultaneously, the uppermost electronic paper 10 on the first lifter 31 and the electronic paper 10 ′ on the second lifter 33 are the same. They are positioned on a plane and set together at the writing position.

  In the state of FIG. 5, the voltage from the control unit is applied to the transparent electrode 102A and the common electrode 107 (see FIG. 4) of the uppermost electronic paper 10 on the first lifter 31 and the electronic paper 10 ′ on the second lifter 33. Further, image light is projected from the projector 35 to each writing area. As a result, images are recorded in the writing areas of the uppermost electronic paper 10 on the first lifter 31 and the electronic paper 10 ′ on the second lifter 33.

  Next, the control unit drives the paging unit 36 so that the drive shaft 36A is pulled out in the direction of arrow R from the hole 10B of the engaging unit 10A of the electronic paper 10 ′, and further rises by the interval L of the electronic paper 10. The first lifter 31 is driven as described above, and at the same time, the second lifter 33 is driven so that the electronic paper 10 ′ is lowered by the interval L.

  Next, the control unit drives the paging unit 36 to advance the drive shaft 36 </ b> A (in the direction of arrow F) and insert it into the hole 10 </ b> B of the engaging unit 10 </ b> A of the uppermost electronic paper 10 on the first lifter 31. Next, the control unit rotates the drive shaft 36A and simultaneously drives the first and second air cylinders 32 and 34 to raise the first lifter 31 and simultaneously lower the second lifter 33.

  As a result of this cooperative operation, as shown in FIG. 7, the uppermost electronic paper 10 on the first lifter 31 is rotated by 180 ° to become electronic paper 10 ″ and placed on the electronic paper 10 ′. Since the first lifter 31 and the second lifter 33 are driven simultaneously, the uppermost electronic paper 10 on the first lifter 31 and the electronic paper 10 ″ on the second lifter 33 are on the same plane. Are both set to the write position.

  Thereafter, writing is performed as described above. When this writing is completed, the first and second lifters 31 and 33 are driven, and the next operation of paging the electronic paper 10 is performed by the first lifter 31. The process is sequentially executed until the last electronic paper 10 is reached.

(Effect of the second embodiment)
According to the image writing apparatus of the second embodiment, since the book type display recording medium 20 can be automatically turned and sequentially written, it is possible to simultaneously write on the two electronic papers 10 at the same time. Thus, the writing speed can be increased.

[Third Embodiment]
FIG. 8 shows an image writing apparatus according to the third embodiment of the present invention. In the present embodiment, in the second embodiment, a second projector 38 is used in addition to the projector 35 as the first projector, and the book-type display recording medium 20 and the first lifter 31 are set in the vertical position. It is placed on the support base 40, the frontmost electronic paper 10 is locked by the stopper 37, and the image writing to the frontmost electronic paper 10 is performed by the second projector 38. There are other configurations similar to those of the second embodiment. Note that image writing to the electronic paper 10 ′ on the second lifter 33 is performed by the projector 35. Further, the paging unit 36 is not necessary. Here, the first and second lifters 31 and 33, the first and second air cylinders 32 and 34, and the stopper 37 constitute a page feed means. The electronic paper 10 waiting in the vertical position on the support base 40 is not limited to the vertical direction, and may be in an oblique direction different from the horizontal direction.

(Operation of the third embodiment)
First, writing to the frontmost electronic paper 10 of the upright book type display recording medium 20 is performed by the second projector 38 under the control of the control unit. After this writing, the control unit instantaneously rotates and returns the stopper 37 clockwise in the figure, or momentarily moves up and down, so that the foremost electronic paper 10 falls forward, and the electronic paper 10 ′ is the first electronic paper 10 ′. 2 on the lifter 33. Next, the control unit drives the first air cylinder 32 to move the first lifter 31 forward by the length of the joint unit 12 and lower the second lifter 33 by a predetermined distance to move the electronic paper 10 ′. Set to the write position. Next, the control unit operates the projectors 35 and 38 to simultaneously write on the electronic paper 10 ′ on the second lifter 33 and the frontmost electronic paper 10 in the vertical position. Thereafter, in conjunction with the operation of the stopper 37, the second air cylinder 34 is lowered by the interval L of the electronic paper 10 and the first lifter 31 is advanced, and the above operation and processing are performed on the first lifter 31. This is performed until the last electronic paper 10 is reached.

(Effect of the third embodiment)
According to the third embodiment, similarly to the second embodiment, the book-type display recording medium 20 can be automatically turned and written, so that the two electronic papers 10 can be written simultaneously. Thus, the writing speed can be increased. Further, since the paging unit 36 required by the second embodiment is not required, the cost can be reduced and the size can be reduced.

[Fourth Embodiment]
FIG. 9 shows an image writing apparatus according to the fourth embodiment of the present invention. In the third embodiment, an exposure unit 39 as a writing unit is installed in the second lifter 33 in the third embodiment, and the second projector 38 is removed. It is the same as the form.

  The exposure unit 39 includes a liquid crystal display 39A that generates image light to be written on one surface of the electronic paper 10, a backlight that illuminates the liquid crystal display 39A from the back, and a main body 39C that houses these. Yes. In place of the liquid crystal display 39A, the writing area of the electronic paper 10, such as a CRT display, a PDP (plasma display), an EL (electroluminescence) display, a VFD (fluorescent display), or an FED (field emission display), is abbreviated. It is also possible to use a display having an equal magnification display area. In addition, a device such as a cold cathode tube, a white LED (light emitting diode), or an EL (electroluminescence) can be used for the backlight 39B.

(Operation of the fourth embodiment)
The image writing apparatus 30 according to the present embodiment operates the projector 35 and the exposure unit 39 at the same time, and simultaneously writes on both sides of one electronic paper 10. First, as in the third embodiment, the electronic paper 10 at the forefront of the book-type display recording medium 20 is moved by instantaneously rotating the stopper 37 clockwise and returning it or moving it up and down instantaneously. It falls forward and is placed on the second lifter 33 as electronic paper 10 ′.

  Next, the control unit drives the first air cylinder 32, advances the first lifter 31 by one length of the joint unit 12, and sets the electronic paper 10 'to the writing position. Next, the control unit operates the projector 35 and the exposure unit 39 simultaneously, and the exposure unit 39 writes on the lower surface of the electronic paper 10 ′ and the projector 35 writes on the upper surface of the electronic paper 10 ′. Thereafter, every time a page is turned, the second air cylinder 34 is lowered by an interval L and the first lifter 31 is advanced, and the above operation and processing are performed until the last electronic paper 10 in the vertical position state is reached. .

(Effect of the fourth embodiment)
According to the fourth embodiment, similarly to the second embodiment, the book-type display recording medium 20 can be automatically turned and written, so that writing can be performed on both sides of one sheet at the same time. As a result, the writing speed can be increased. Further, since the book-type display recording medium 20 is written in an L-shaped open state, the space occupied by the image writing device 30 can be reduced. Furthermore, since the paging unit 36 required by the second embodiment is not necessary, the cost can be reduced and the size can be reduced. Further, since writing can be performed simultaneously on both sides of one electronic paper 10, writing can be performed on both sides in units of one sheet.

[Fifth Embodiment]
FIG. 10 shows an image writing apparatus according to the fifth embodiment of the present invention. This embodiment is a configuration in which the two electronic papers 10 to be written on the book-type display recording medium 20 can be arranged in the vertical position in the third embodiment of FIG. This is the same as the embodiment. The second lifter 33 is formed in an L shape to receive the electronic paper 10 conveyed downward, and is configured to be movable in the horizontal direction.

(Operation of the fifth embodiment)
First, the book-type display recording medium 20 in a bound state is set on the support base 40 between the stopper 37 and the first lifter 31. Next, the control unit rotates the stopper 37 momentarily in the clockwise direction in the drawing and returns it, or momentarily moves it up and down to rotate the frontmost electronic paper 10 180 degrees so that it falls forward, It is assumed that the electronic paper 10 ′ is in a state where it hangs down in contact with the vertical surface of the lifter 33. Next, the control unit drives the first air cylinder 32 and conveys it to the projector 38 side by an interval L corresponding to the length of one joint unit 12. As a result, the electronic paper 10 and the electronic paper 10 ′ newly locked by the stopper 37 are flush with each other in the vertical direction. This same plane is the writing position.

  Next, writing is simultaneously performed by the projector 38 on the frontmost electronic paper 10 and the suspended electronic paper 10 ′ that are locked to the stopper 37. When the writing is completed, the control unit drives the stopper 37 as described above, tilts the frontmost electronic paper 10, and makes the hanging electronic paper 10 ′ two. Next, the first air cylinder 32 and the second air cylinder 34 are driven simultaneously, and the book-type display recording medium 20 is conveyed to the projector 38 side by the length of one joint portion 12 and at the same time the second air cylinder 34 is driven. The lifter 33 moves in the direction of the arrow by the interval L. As a result, the electronic paper 10 newly locked by the stopper 37 and the second electronic paper 10 'rotated downward are in the same plane in the vertical direction. Writing is performed by the projector 38 on the two electronic papers 10 positioned on the same plane. Thereafter, in the same procedure, the conveyance by the first air cylinder 32, the turning of the page by the stopper 37, and the writing by the projector 38 are sequentially performed until the last sheet of the book type display recording medium 20 is reached.

(Effect of 5th Embodiment)
According to the fifth embodiment, similarly to the third embodiment, the book type display recording medium 20 can be automatically turned and written, so that writing can be performed on both sides of one sheet at the same time. As a result, the writing speed can be increased. Further, since the electronic paper 10 ′ that is suspended and transported by the operation of the stopper 37 is transported to the suspended position by gravity without applying a driving force, power for rotationally driving can be eliminated.

[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 combination of the components between the embodiments can be arbitrarily performed.

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

  The display recording medium may be a medium that can record and display an image on only one side.

1 is a front view showing a book-type display recording medium according to a first embodiment of the present invention. It is a right view of the book type display recording medium of FIG. The top view and sectional drawing of the book type display recording medium of FIG. 1 are shown, (a) is a top view, (b) is the AA sectional view, (b) is the BB sectional drawing. It is sectional drawing which shows the cross section of the CC line | wire of the display recording part of FIG. It is a front view which shows the image writing apparatus which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the detail of the paging part of FIG. FIG. 6 is a front view showing a progress state of paging accompanying writing to electronic paper in the image writing apparatus of FIG. 5. It is a front view which shows the image writing apparatus which concerns on the 3rd Embodiment of this invention. It is a front view which shows the image writing apparatus which concerns on the 4th Embodiment of this invention. It is a front view which shows the image writing apparatus which concerns on the 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image writing device 10, 10 ', 10 "Electronic paper 10A Engagement part 10B Hole 11 Display recording part 11a Front surface 11b Back surface 12 Joint part 12a Fitting part 12b Connection part 12c Opening 13 Slit 20 Book type display recording medium 30 Image Writing device 31 First lifter 32 First air cylinder 33 Second lifter 34 Second air cylinder 35 Projector 36 Paging unit 36A Drive shaft 37 Stopper 38 Second projector 39 Exposure unit 39A Liquid crystal display 39B Backlight 39C Main body 40 Support base 70, 71 Write pattern light 72, 73 Illumination light 74, 75 Display light 101A, 101B Substrate 102A, 102B Transparent electrode 103A, 103B Liquid crystal layer 104A, 104B Isolation layer 105, 106 Photoconductive layer 105a, 105c, 106a 106c charge Namaso 105b, 106b charge transport layer 107 common electrode 108A, 108B light-absorbing layer

Claims (15)

A plurality of display recording media capable of visually displaying images on both sides and capable of holding the images without power;
A book-type display recording medium comprising: a holding unit that rotatably holds one side of the plurality of display recording media.   The display recording medium is provided with a first display recording unit in which a photoconductive layer and a liquid crystal layer are stacked between a pair of electrodes, and a stacked layer on the first display recording unit. 2. The book type display recording medium according to claim 1, further comprising a second display recording unit formed by laminating a conductive layer and a liquid crystal layer.   The display recording medium includes a first display recording unit formed by laminating a photoconductive layer and a liquid crystal layer between an electrode provided on one surface and a common electrode provided on an intermediate layer, and the other surface. 2. The book type display recording medium according to claim 1, further comprising a second display recording unit formed by laminating a photoconductive layer and a liquid crystal layer between the provided electrode and the common electrode.   The book-type display recording medium according to claim 1, wherein the holding unit is configured such that the plurality of display recording media are detachable.   The holding portion includes a joint portion in which one is rotatably fitted to the one side of the plurality of display recording media and the other is rotatably fitted to the one side of the other display recording media. The book type display recording medium according to claim 1. The display recording medium includes a columnar engaging portion provided on the one side, and a slit formed along the one side in the vicinity of the engaging portion,
The joint portion is provided at both ends, and is fitted to the engagement portion so as to be rotatable, and a pair of fitting portions having a C-shape that moves through the slit when the joint portion is rotated, The book-type display recording medium according to claim 5, further comprising a connecting portion that connects the pair of fitting portions. In an image writing apparatus for a book-type display recording medium in which one side of a plurality of display recording media is rotatably held,
Page feed means for sequentially page-turning the plurality of display recording media;
An image writing apparatus comprising: writing means for writing images on both sides of the display recording medium opened by the page feeding means.   The writing unit includes a single exposure unit that collectively writes images on the surfaces of the two adjacent display recording media facing each other in a state where the two display recording media are opened by the page feeding unit. 8. The image writing apparatus according to claim 7, wherein   The writing means includes first and second exposure units that respectively write images on the surfaces of the two adjacent display recording media facing each other in a state where the two display recording media are opened by the page feeding means. The image writing apparatus according to claim 7, further comprising:   8. The image writing apparatus according to claim 7, wherein the writing means includes first and second exposure units for writing images on both sides of the display recording medium, respectively.   The image writing apparatus according to claim 8, wherein the exposure unit is a projection apparatus such as a projector that projects image light from a place away from the display recording medium and writes the image. The first exposure unit is a display device such as a liquid crystal display that writes the image by irradiating image light in contact with or close to the display recording medium,
11. The image writing apparatus according to claim 9, wherein the second exposure unit is a projection apparatus such as a projector that writes the image by irradiating image light from a place away from the display recording medium. .   The page feed means is provided in parallel, and is used for raising and lowering the first and second raising / lowering means, and first and second raising / lowering means for raising and lowering each display recording medium opened horizontally. The image writing apparatus according to claim 7, further comprising a rotating unit that rotates the display recording medium in conjunction with the display recording medium to feed the page.   The page feed means includes a raising / lowering means for raising and lowering the display recording medium in the horizontal direction among the display recording media opened in a horizontal direction and a direction different from the horizontal direction, and a direction different from the horizontal direction. 8. The image writing apparatus according to claim 7, further comprising a rotating unit that sequentially rotates the plurality of display recording media positioned in the horizontal direction to feed the display recording media to a page. The page feed means includes a turning means for supporting the plurality of display recording media in a direction different from a horizontal direction and turning the plurality of display recording media one by one using gravity to feed the pages. 8. The image writing apparatus according to claim 7, wherein