KR100478596B1 - Displaying device of reel-type - Google Patents

Abstract

A winding-type display device is provided to configure a display with a display element which can repeatedly record visual information while erasing the recorded visual information, thereby easily changing displayed information without attaching labels. A display medium(113) is completely wound on an shaft center(114) of the first winding portion(111) or a shaft center(115) of the second winding portion(112) when a winding-type display device(110) is closed. A recording device and an erasing device are attached between the first winding portion(111) and the second winding portion(112). The recording device consists of either a heating unit for recording information by heating or an electric field applying unit for recording the information by applying an electric field, in order to record the information on the display medium(113) around an entrance of the display medium(113) of at least either the first winding portion(111) or the second winding portion(112).

Description

Display Device of Reel-type

The present invention relates to a display device having a display portion which makes it possible to easily change the display contents.

As is well known, recording media such as floppy disks, optical disks, magneto-optical disks, VTR cassettes, etc., have display portions for displaying the recording contents, and these display portions are often constituted by labels adhered to the outer case. .

In the above-described conventional recording medium, there is a problem that it takes a lot of effort because the label must be replaced when the recorded contents are rewritten.

Therefore, in the recording medium which frequently rewrites the recording contents, the recording contents are often not recorded on the display unit, but in this case, the recording contents are forgotten.

In addition, in the case of recording media where contents are frequently updated every time, the label has to be re-attached every time the contents of the recording are updated. .

In addition, the recording is usually recorded in text on the display, but after a long time, the impression on the content is blurred, so it may not be possible to immediately recall the content of the recording. If it had been uncomfortable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to easily change the display contents of the display unit.

In order to achieve the above object, according to the present invention, there is provided an apparatus having a display section for displaying recorded contents, the display section comprising a display element capable of repeatedly recording and erasing visible information.

(Example)

Next, specific embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view showing an embodiment in which the present invention is applied to a VTR cassette, and FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1.

As shown in Fig. 1, the VTR cassette (recording medium) 1 has a magnetic tape (not shown) housed in a substantially rectangular quadrangular outer case 2 made of synthetic resin.

A spherical concave portion 2a is formed in the center of the upper surface of the outer case 2, and a display portion 3 made of a reversible display element is provided in the concave portion 2a.

The reversible display device constituting the display unit 3 applies an electric field perpendicularly to a liquid crystal / polymer composite film (hereinafter referred to as a PDLC film) formed by dispersing liquid crystal in a polymer and a PDLC film. It has a means for.

As this means, both sides of the PDLC film may be sandwiched by an electrode. However, in order to apply an electric field to an arbitrary portion, only the back side electrode is used, and the surface side electrode may be an external electrode or the like.

Therefore, the reversible display element becomes at least an electrode (conductive layer) and a PDLC film, and appropriately forms a protective layer of the PDLC film.

In addition, when the surface of the recording medium provided with the reversible display element is conductive, the conductive layer can be omitted.

The principle of recording / erasing the visible information of the reversible display device by the PDLC film is the change of the order of liquid crystal molecular alignment due to heat and electric field (thermal-field mode) [homeotropic orientation, homogeneous orientation] ) And light transmission (large and small amount of light absorption of dichroic dyes) in the case of a gate-host effect using a dichroic dye.

Therefore, in the case of using the white light (light decay) in the recording state and the transparent (light transmission) in the erasing state as the display state, the factor is spot-heatable, for example, a thermal head or a laser head. It is performed by heating means such as a laser head, and the erasing is performed by applying an electric field above the threshold value of liquid crystal alignment to the PDLC film.

The PDLC film described above has an excellent excellent performance when applied to a recording medium as compared with the various reversible display devices in the conventional thermal-thermal mode.

That is, since the orientation state by electric field changes at a high speed of [kV], high-speed rewrite processing is possible and the number of rewritable times is also sufficient.

In addition, the visual recognition of the combination of the two-colored pigments is good, and since two types of external energy are used for rewriting, it cannot be easily modulated and the display is hard to be erased in a natural environment, and thus the display reliability is high.

As the PDLC membrane, for example, it is possible to use the one proposed in Japanese Patent Application Laid-Open No. 4-71899. Among them, the PDLC membrane manufactured by the microcapsule method has various liquid crystals such as no liquid exudation since the liquid crystal is completely surrounded by microcapsules. It is excellent in the point of view, and what was proposed by the applicant of Unexamined-Japanese-Patent No. 5-301489, Unexamined-Japanese-Patent No. 6-33283, Unexamined-Japanese-Patent No. 6-44735, and No. 6-119702 etc. can also be used.

Fig. 2 shows the layer structure of the reversible display element 4 employed in this embodiment, and the conductive layer 5, the PDLC film 6, and the protective layer (on the recessed portion 2a of the outer case 2) are shown. 7) is formed sequentially.

That is, the reversible display element 4 is formed on the concave portion 2a by a known method such as a coating method, a printing method, a transfer method, or a lamination method.

Examples of the polymer matrix for dispersing and maintaining the liquid crystal in the PDLC film 6 include vinyl chloride resins such as vinyl chloride resin and vinyl chloride-vinyl acetate copolymer, vinylidene chloride resin, polyacrylate, polymethacrylate, and acryl. Acrylic resin, polyvinyl alcohol resin, polycarbonate resin, polyester resin, epoxy resin, polyamide resin, polyurethane resin, polythiol resin, ultraviolet ray or electron beam Ionizing radiation-curable resins to be cured using.

Examples of the liquid crystal include smectic liquid crystals, nematic liquid crystals, cholesteric liquid crystals, dicholesteric liquid crystals, polymer liquid crystals, and mixed systems thereof.

In addition, an appropriate amount of dichroic dye may be mixed with the liquid crystal to increase the display contrast by the guest-host effect, thereby improving visual recognition.

In addition, in order to disperse the liquid crystal in the polymer matrix, various methods such as phase separation method, emulsion zone method, microcapsule method, solvent evaporation method and suspension polymerization method can be used. Among them, the emulsion zone method and microcapsule method which have the effect of preventing the liquid crystal bleeding In addition, the microcapsule method has the effect of improving the durability of the dispersed liquid crystal particles, and the microcapsule method by the in-situ polymerization method is excellent in that the particle diameter of 10 μm or less is obtained in a very suitable amount in terms of practical film thickness and display quality. .

The PDLC film 6 is usually used with a film thickness of about 3 to 23 mu m, but the lower limit is determined in terms of display contrast, and the upper limit is determined from the point of practical driving voltage in the alignment state of the liquid crystal.

As the conductive layer 5, if the conductive layer 5 has a conductivity (for example, 10 ¹² ? / Sq or less in area resistance) that can apply a vertical electric field to the PDLC film 6 as a horizontal disconnection in the horizontal direction, the semiconductor The material of the region may be used, but considering the loss of applied voltage or the like, good conductivity is preferable.

For example, the conductive layer 5 is made of a metal intermediate film such as aluminum, a metal foil, an ITO film, a transparent conductive film, a conductive coating film made of carbon black, or the like.

In addition, in this embodiment, as shown in FIG. 1, the terminal part 5a is formed in the back edge of the conductive layer 5 so that it may protrude from the recessed part 2a.

This terminal portion 5a is in contact with the ground electrode in the indexing device 10 when the VTR cassette 1 is mounted in the indexing device 10 described later.

In addition, the conductive layer 5 is made of a transparent material, and this terminal portion 5a is not visible.

In addition, the terminal portion 5a may be extended to the rear surface of the outer case 2 so that the terminal portion 5a contacts the chassis of the indexing device 10 so that the terminal portion 5a is grounded.

Alternatively, the liquid crystal may be oriented by arranging the charger on the side of the PDLC film 6 so as to be in a non-contact state without providing the terminal portion 5a, or by bringing the electrode into contact with the PDLC film.

The protective layer 7 is appropriately installed to protect the PDLC film 6 from pressure, external force, external environment, and the like, and to provide heat resistance, abrasion resistance, scratch resistance, etc. to the print head 18 of the indexing device 10 described later. do.

As the protective layer 7, a curable resin such as a thermosetting resin, an ionizing radiation curable resin to be cured by ultraviolet rays or an electron beam is preferable in terms of physical properties, and various additives such as lubricants such as waxes are appropriately mixed with a coating liquid or ink of these resins. Form the front or part.

The thickness of the protective layer 7 is about 0.5-10 micrometers.

The forming portion of the protective layer 7 may be formed on the PDLC film 6 or the side surface of the PDLC film 6, for example, the non-forming portion of the PDLC film 6, that is, the conductive layer 5 other than the display portion 3. It is the whole surface of the equipment sheet mentioned later on the visible permanent fixed information.

In the case of forming the protective layer 7 on the entire surface of the base material sheet, a resin film made of polyethylene terephthalate or the like is used as the protective layer 7.

As shown in FIG. 3, the intermediate layer 8 may be interposed between the PDLC film 6 and the protective layer 7, and the adhesive layer 9 may be interposed between the PDLC film 6 and the conductive layer 5.

The intermediate layer 8 prevents the PDLC film 6 from being damaged when the protective layer 7 is formed by coating or the like, and the adhesive layer 9 improves the adhesion between the conductive layer 5 and the PDLC 6. It is for.

In the case where the protective layer 7 is formed of a coating liquid, the intermediate layer 8 as an isolation layer is coated with a coating liquid that does not affect the liquid crystal so that the coating liquid solvent component penetrates into the PDLC film 6 and does not degrade the liquid crystal alignment performance. It is also possible to form the protective layer 7 after formation.

In the formation of such intermediate layer 8, a water-soluble coating solution of water-soluble resin such as polyvinyl alcohol, polyvinylpyrrolidone, carboxymethyl cellulose, starch or the like is used.

The thickness of the intermediate | middle layer 8 is about 0.5-10 micrometers.

The thicknesses of the protective layer 7 and the intermediate layer 8 are such that they do not require excessive voltage for electric field application.

By forming the intermediate layer 8, the degree of freedom of resin selection of the protective layer 7 is increased, and for example, when the ionizing radiation curable resin such as flexible ethane acrylate is used for the protective layer, excellent heat resistance, abrasion resistance, scratch resistance, printhead Proper head contact and shock absorbency are obtained.

In addition, the reversible display element 4 may be provided on a substrate sheet having an adhesive layer on the rear surface, and the substrate sheet may be adhered on the recording medium.

Examples of the equipment sheet include polyester resins such as polyethylene terephthalate, vinyl chloride resins such as polyvinyl chloride, olefin resins such as polypropylene, acrylic resins such as polymethyl methacrylate, and styrene coefficients such as polystyrene. Resin sheets, such as cellulose resins, such as a paper and cellulose triacetate, paper, such as a board and a coated paper, synthetic paper, metal foil, a ceramic sheet, or these composites, etc. can be used.

Although the thickness is suitably selected by a use, it is about 50-1000 micrometers.

These are usually insulating, but can be used as the conductive layer 5 and the conductive layer 5 can be omitted if appropriate conductivity (a thickness of 10 ⁸ Ω or less at the thickness of the equipment sheet to be used) is provided.

In addition, the surface of the recording medium or the material sheet may be subjected to a known easy adhesion treatment such as a corona treatment, a primer treatment with a silane binder, a urethane resin, or the like in order to improve adhesion to the conductive layer 5.

In this case, when the conductive layer 5 is made transparent, the surface of the recording medium 1 such as the VTR cassette and the color of the material sheet are visible, so that the outer case of the recording medium 1 is formed of colored material. If the sheet is made of a sheet of synthetic resin or paper such as white or a cover layer (not shown) by printing or coating of white lamp under the conductive layer 5, the surface of the reversible display element 4 can be formed. Image becomes easy to see.

In particular, it is possible to obtain a black character factor on a white background by using a black color type as a dichroic dye, which is very easy to see.

Next, an indexing device for recording and erasing information on the display unit 3 of the VTR cassette 1 will be described.

As shown in Fig. 4, the indexing apparatus 10 has a rectangular quadrangular appearance and has a spherical cassette insertion hole 11 that extends horizontally from the front side to the rear side.

The VTR cassette 1 is inserted into the cassette insertion hole 11 from the front end side with the concave portion 2a upward, and is positioned when the front end abuts against the inside of the cassette insertion hole 11.

The front face of the indexing device 10 is provided with a manipulation handle group 12, a display device 13 made of liquid crystal, and a power switch 14, and a leg 15 is attached to four corners of the bottom surface.

As shown in Fig. 5, the main scanning direction is parallel to the upper surface of the VTR cassette 1 in the upper part of the cart insertion hole 11 in the inside of the indexing apparatus 10 (the left and right directions of the indexing apparatus 10). A recording / erasing mechanism 16 is provided which travels in the direction and records and erases information indicating the recorded contents on the display unit 3.

The recording / erasing mechanism 16 has a rectangular-shaped movable body 17 made of synthetic resin or the like extending in the left-right direction of the indexing apparatus 10. The lower surface of the movable body 17 has a print head 18 and an erasing head ( 19) is installed.

As shown in Fig. 6, at one end of the movable body 17, a through hole 20 through which the support shaft 21 extending in the front-rear direction of the indexing device 10 slides freely is formed.

In addition, both ends of the support shaft 21 are supported by bearings provided in the chassis (not shown) of the indexing apparatus 10.

At the other end of the movable body 17, a screw hole 22 is formed which extends in the front-rear direction of the indexing device 10 and passes through the rotating shaft 23 in which the screw is stamped on the outer surface and is screwed.

In addition, both ends of the rotating shaft 23 are freely supported by a bearing provided in the chassis of the indexing device, and one end of the rotating shaft 23 is connected to an electric motor (not shown) attached to the chassis.

When the electric motor is driven, the movable body 17 is guided by the support shaft 21 to move in the front-rear direction of the indexing apparatus 10.

The lower surface of the movable body 17 is provided with a rail 17a having a spherical cross section extending in the longitudinal direction of the movable body 17 (see Fig. 5). The print head 18 slides freely on the rail 17a. Lost

The print head 18 is constituted by a laser beam head, a thermal head or the like in order to apply heat to the display unit 3 and record information.

The print head 18 has a screw hole 18a which extends in the longitudinal direction of the movable body 17 and penetrates and screwes the rotating shaft 24 in which the screw is stamped on the outer surface.

In addition, both ends of the rotating shaft 24 are freely supported by a bearing (not shown) provided on the movable body 17, and one end of the rotating shaft 24 is connected to an electric motor (not shown) attached to the movable body 17. It is.

The print head 18 which drives this electric motor is guided by the rail 17a, and moves to the longitudinal direction of the moving body 17. As shown in FIG.

The erase head 19 applies an electric field to the display unit 3 to erase information recorded on the display unit 3.

7 is a perspective view of the erasing head 19 from below, and as shown in the figure, the erasing head 19 is formed on a spherical substrate 25 extending in the longitudinal direction of the movable body 17 and on the substrate 25. Voltage supply 26 via an elongate voltage supply 26 arranged to extend in the longitudinal direction and a conductor pattern 25a formed on the substrate 25 and arranged in an array on the substrate 25 in the longitudinal direction. A plurality of electrodes 27 connected to are provided.

At a position close to the front side above the cassette insertion hole 11, a ground electrode (not shown) in contact with the terminal portion 5a provided on the upper surface of the outer case 2 of the VTR cassette 1 is provided.

FIG. 8 is a block diagram showing the configuration of an image processing circuit in the indexing apparatus 10. FIG. 9 is a system configuration for recording a part of the image recorded in the VTR cassette 1 on the display section 3 of the VTR cassette 1. FIG. It is a figure which shows.

8 and 9, a method of recording a part of the image recorded in the VTR cassette 1 on the display unit 3 will be described.

First, in FIG. 9, the VTR cassette 1 is placed in the VTR 201 to perform a regeneration operation. The reproduced image is displayed on the television receiver 202 as an image.

In addition, the video signal is transmitted from the television receiver 202 to the indexing apparatus 10 during the replay operation.

As shown in FIG. 8, the indexing apparatus 10 has an image memory 101 having a capacity of one frame, and continuously stores and rewrites a video signal of one frame (two fields) during a rework operation.

Here, if the indexing device 10 is set to the recording mode by operating a predetermined knob of the operation knob group 12, the rewriting operation of the image memory 101 is stopped.

Then, playback of the VTR 201 is stopped, the VTR cassette 1 is taken out, and this is mounted in the indexing device 10.

In this state, when the recording start state is set by the handle of the operation knob group 12, the video signal for one frame stored in the image memory 101 is read out, and the image code is processed by the video signal processing circuit 102. The driving circuit 103 is then provided.

The driving circuit 103 forms a pulse having a width corresponding to the level of the image signal for each pixel unit, and drives the print head 18 with the pulse.

In the case where the printhead 18 is composed of a laserhead, a time laser beam of the aforementioned pulse width is issued.

The print head 18 scans in the horizontal direction (main scanning direction or horizontal direction) of the indexing apparatus 10 and the front-back direction (sub scanning direction or vertical direction) of the indexing apparatus 10 by the above-mentioned moving mechanism, and the thermal head or The image for one frame described above is formed on the display unit 3 by the heat of the laser beam.

In addition, although the scanning signal is generated in the separate indexing apparatus 10, the generation can be performed by the same method as that employed by a printer or the like.

In addition, when forming an image as a thermal head, it is called a normal serial head which records information while moving sequentially in the left and right directions as mentioned above, and also called a line head in which one row of thermal heads are arranged side by side in the left and right directions. It is possible.

In this case, since only scanning in the front-back direction is sufficient, it becomes possible to form an image quickly.

Next, in order to erase the image displayed on the display unit 3, a voltage is applied from the voltage supply 26 to the electrode 27 in the range specified by the knob operation of the operation knob group 12. FIG.

On the other hand, the ground layer is separately provided to the conductive layer 5 of the display portion 3 via the terminal portion 5a.

Therefore, an electric field is generated between the electrode 27 to which the voltage is applied and the conductive layer 5, so that the information (image) of the PDLC film at the portion where the electric field is generated is erased.

The display unit 3 may be divided into four regions E 'to E' as shown in FIG. 10, and images may be recorded and displayed separately in each of the regions.

In this way, a plurality of scenes can be displayed on the display unit 3.

In this case, the image can be recorded in a predetermined area by controlling the scanning range of the printhead 18.

In the case of erasing, the predetermined area can be erased by selecting the electrode 27 which gives the moving range and voltage of the erasing head 19.

The number of dividing the display unit 3 is not limited to four, but can be divided into any number.

In the embodiment of Fig. 9, the image recording or erasing of the display unit 3 is performed by using an indexing device 10 separate from the VTR 201. However, the function and configuration of the indexing device 10 are not limited to the VTR 201. In the state where the VTR cassette 1 is attached to the VTR 201, recording and erasing to the display unit 3 may be performed.

In the embodiment of Fig. 11, the display portion 302 of the floppy disk 301 is formed using the same elements as the reversible display element 4 described above, and the personal computer 303 has the same function as the indexing device 10 described above. It shows the case to have.

In this case, a recording / erasing mechanism 16 as shown in Fig. 6 is provided in the floppy disk insertion hole 304, for example.

The personal computer 303 is driven while the floppy disk insertion hole 304 is inserted into the floppy disk insertion hole 304, and the contents displayed on the screen of the monitor 305 by the operation of the keyboard 306 are displayed. Can be recorded on the display unit 302.

For example, a file name, an index, etc. can be recorded, or another image can be recorded.

Also, erasing can be performed by operating the keyboard 306 in a state where the floppy disk 301 is inserted into the floppy disk insertion hole 304.

In addition, unlike the embodiment of FIG. 11, when the personal computer 301 does not have a recording / erasing function, the display unit 302 of the floppy disk 301 using the dedicated indexing apparatus 10 as shown in FIG. Write) and erase.

In this case, it is assumed that the indexing apparatus 10 receives the file name or image data from the personal computer 303 via a cable.

In this case, the image memory 101 of the indexing device 10 may be removed and the memory in the personal computer may be used.

In addition, the indexing device 10 may be provided with a function of driving a floppy disk to enable connection with a personal computer, and the indexing device 10 may also serve as an external storage device.

Also in this case, a memory for storing an image may be provided in the indexing device 10 or a memory in a personal computer may be used.

In the above embodiment, the case where the recording medium is a floppy disk or a VTR cassette has been described. However, the present invention is not limited to this and can be applied to any recording medium.

For example, what can be applied to magneto-optical disks, optical disks, IC memory cards, audio cassettes, and the like can be considered.

The optical disc is a compact disc (CD) compact disc read-only memory (CD-ROM) mini-disc (about 2.5 inches by 2.5 inches in size, mainly used for recording and playing music, also known as MD) Also, it is a digital versatile disc (DVD) such as a DVD-ROM or a DVD-RAM.

Further, in the above-described embodiment, information is recorded and erased from the surface of the outer case of the recording medium, but it is also possible to form a display portion directly on the recording medium itself.

For example, in the case of a recording medium that is not stored in an external case, in the case of a CD-ROM or a DVD-ROM, a display portion can be formed in the center of the surface thereof. A display portion can be formed on the flat surface of the surface to be excluded, and information including an image related to the contents recorded on the recording medium can be recorded or erased on such display portion.

In the above embodiment, the case where the image is recorded on the display portion of the recording medium has been described, but information other than the image may be recorded.

For example, in an audio cassette, since video signals are not recorded, information such as letters, symbols, and numbers may be recorded. In this case, an indexing device capable of recording such information is required.

In addition, in the present invention, a "reversible thermal recording layer" or the like, which is a material which slightly reduces the display accuracy but reversibly causes a visible change due to temperature change, can also be used.

In this "reversible thermal recording layer", the visible change is divided into a change in the state of the color and a change in the shape.

Changes in the state of color include changes in transmittance, reflectance, absorption wavelength, scattering degree, and the like, and the actual reversible thermal recording material is displayed by a combination of these changes.

More specifically, it may be anything as long as the transparency or color tone is reversibly changed by heat. For example, the second specific temperature becomes the state of the first color at the first specific temperature higher than the room temperature and is higher than the first specific temperature. The state of a 2nd color can be mentioned by heating with and cooling after that.

In particular, it is quite appropriately used that the state of color changes at the first specific temperature and the second specific temperature.

Examples of these include a transparent state at a first specific temperature and a cloudy state at a second specific temperature (Japanese Patent Application Laid-Open No. 55-154198). Coloring at a second specific temperature and discoloring at a first specific temperature. (Published in Japanese Patent Application Laid-Open No. Hei 4-224996, Japanese Patent Application Laid-Open No. 4-247985, Japanese Patent Application Laid-Open No. 4-267190, etc.), becoming cloudy at a first specific temperature and becoming transparent at a second specific temperature (Japan Japanese Patent Application Laid-Open No. 3-169590), which is colored in black, red, blue at the first specific temperature and discolored at the second specific temperature (JP-A-2-188293, JP-A-2-188294). ), Etc.

Among these, the following two materials can be mentioned as a representative.

① A material in which the transparent state and the cloudy state change reversibly

② Material whose color such as dye changes chemically

As a representative example, the heat-sensitive layer which disperse | distributed organic low molecular weight substances, such as higher alcohol and higher fatty acids, in resin base materials, such as polyester, was mentioned as a prior art as mentioned previously and repeated repeatedly.

As a representative example, ② is a case where the reversibility of the leuco-based thermal recording material is enhanced.

Although the display part 3 is provided in the VTR cassette 1 in the Example of FIG. 1 mentioned above, you may provide the said display part in the container (case) which accommodates the VTR cassette 1.

The example of FIG. 12 has shown the example which provided the display part in such a container.

The container 40 shown in FIG. 12 is a box shape made of synthetic resin or the like, and has an opening portion 41 through which a VTR cassette can be inserted in and out on one side thereof.

A spherical concave portion 42 is formed on the upper surface of the container 40, and a display portion 43 made of the above-mentioned reversible display element is provided in the concave portion 42.

Therefore, the structure of the display unit 43, the recording, erasing, and the like are applied to the display unit 3 described with reference to FIGS.

Next, an embodiment of the present invention in which the display device described above is provided in a wound display device will be described with reference to FIGS. 13 to 16.

13A and 13B are conceptual views of a wound display device of the present invention, where 13a shows a closed display device and 13b shows a open display device.

In FIGS. 13A and 13B, reference numeral 110 denotes a winding display device, 111 a first winding part, 112 a second winding part, and 113 a display medium.

The display medium 113 is entirely wound around the shaft center 114 of the first winding part 111 or the shaft center 115 of the second winding part when the wound display device 110 is closed.

A recording apparatus and an erasing apparatus are attached between the first and second windings.

The recording apparatus and the erasing apparatus may be integrally provided on the first winding side, or may be provided separately from the recording apparatus on the first winding side and the erasing apparatus on the second winding side.

When the wound display device 110 is transported, not in use, or when information is recorded on the display medium 113, the first and second winding parts 111 and 112 are in contact with each other as shown in FIG. 13A. If you put it, you can carry it compactly.

When the information displayed on the display medium is recognized (visually), the first winding part 111 and the second winding part 112 are removed by removing the first winding part 111 and the second winding part 112 so that the display medium 113 becomes the required size as shown in FIG. 13B. The necessary information can be seen and recognized.

14A to 14C are conceptual views showing the use situation of the wound display device 110 of the present invention, and partly showing a cross section of the device.

14A is a state before recording information on the display medium 113, FIG. 14B is a state where recording has been completed in which all the information is displayed on the display medium 113, and FIG. Rewinding state is shown, respectively.

In the state shown in Fig. 14B, a signal is input to the recording device 116, and a thermal head in the recording device is driven to write to the display medium.

The recorded display medium is wound up in the second winding portion in synchronism with the recording speed of the thermal head by the shaft center of the winding portion or the drive motor of the winding portion in which the display medium is connected to the plate feed roller (not shown).

In this embodiment, the recording device 116 and the erasing device 117 are provided near the entrance and exit of the first winding part 111.

The case where information is recorded on the display medium 113 will be described.

The display medium 113 wound around the first winding unit 111 is driven to drive the drive motor of the winding unit provided on the second winding unit 112 or the pressure plate roller to sequentially move the display medium 113.

The display medium 113 passes through the recording device 116 and the erasing device 117 provided in the vicinity of the first winding part 111 (see Fig. 14A).

At this time, recording is performed on the display medium 113 located in the recording device 116 by applying signal energy corresponding to the information to be recorded in the recording device 116.

By moving the display medium 113 sequentially and repeating the same procedure, information to be displayed in a desired area of the display medium 113 is recorded (see Fig. 14B).

If all of the reading is not necessary after the reading is finished, energy is applied to the erasing device 117 when the display medium 113 is rewound from the second winding 112 to the first winding 111. The information recorded in the portion located in the erasing apparatus is erased.

When the display medium is sequentially rewound while applying energy to the erasing device, all of the recorded information is erased (see Fig. 14C).

15 is a conceptual diagram showing the configuration of the wound display device of the present invention.

A conceptual diagram showing a state in which a winding type display device of the present invention is equipped with winding drive motors 118 and 119, a signal input unit 120, a recording device, and switches 121 and 122 for driving an erasing device. .

The signal input from the outside is accumulated in the storage memory, and then converted into a signal suitable for driving the thermal head, and information is recorded on the display medium by the thermal head in the recording apparatus via the driving circuit.

The information is erased by the erasing device when the necessary information is output and read and then becomes unnecessary.

As the signal input from the outside, a signal obtained by processing a television signal, a video signal, a facsimile signal, and other image signals through a signal processing circuit is used.

In addition to the above, data from a personal computer or the like may be used.

In addition, the above-described storage memory may store image information of one screen or a plurality of screens, and may be recorded on the display medium while reading sequentially.

In this embodiment, the erasing device 117 is provided on the side of the second winding part.

In addition, the whole apparatus is fixed and hold | maintained by the plate-shaped background object which has a fixed area.

In this case, it can be used for applications such as a so-called whiteboard.

The display medium used in this embodiment is the same as the display medium of the display device provided in the above-described VTR cassette.

Next, the configuration of the recording apparatus and the erasing apparatus used in the wound display device of the present invention will be described.

Fig. 16 is a diagram showing a schematic configuration of a recording apparatus and an erasing apparatus in the case where a liquid crystal / polymer composite film is used for a display medium.

In FIG. 16, the recording device 160 and the erasing device 170 are illustrated as being integral, but both mean that the recording device 160 and the erasing device 170 can be separated into a region surrounded by a dotted line, that is, the recording device 160 and the erasing device 170.

The recording head 160 is provided with a thermal head 183 facing the pressing plate roller 185.

The thermal head receives a predetermined signal and performs a write operation.

The erasing device 170 explicitly shows a power source 184 for supplying a predetermined voltage to the charger 181, and a pressure plate roller 185 is provided to securely contact the processing surface against the ground roller 182. Each is arranged.

The display medium 136 is erased by applying a voltage and recorded by heating.

The charger 181 is a corona charger having a tungsten wire connected to the power source 184 therein.

In addition, a potential difference occurs between the surface of the display medium 136 that is grounded and the power supply is grounded and charged by the charger 181, and the surface of the display medium 136 that contacts the ground roller 182. The electric field is applied in the vertical direction.

As the charger 181, a conventionally known coronon charger, a scoron charger and the like are used.

The ground roller 182 is a roll made of plastic, rubber or the like containing a conductive material such as metal or carbon black.

An elastic body such as rubber is preferable in that the contact is good.

The thermal head 183 may be a heating means by thermal energy of a laser.

As described above, the recording apparatus 160 of the display medium 136 of the present invention has at least an electric field applying means 181 and a thermal head 183 for changing the display state of the display medium 136.

The electric field applying means 181 and the thermal head 183 can be used in both the recording state and the erasing state of the display state. However, when the electric field applying means 181 is used for erasing, the display is not erased by heat in a natural environment. A display medium 136 having excellent display reliability can be obtained.

In addition, various methods may be used for the electric field applying means 181 of the erasing device 170 in addition to the above-described one embodiment.

For example, Japanese Patent Application Laid-Open Nos. 6-103249 and 6-302701 entitled "Non-contact Liquid Crystal Alignment Method and Liquid Crystal Alignment Apparatus for Liquid Crystal Display Media" by the Applicant in the Field Application Method to the PDLC Film 141 (Charge) System) and Japanese Patent Application Laid-Open No. 6-302702 ("Liquid crystal alignment method of liquid crystal display medium and liquid crystal alignment device" (electrode method), etc. can be used.

These application methods can be classified from various viewpoints, and there are a non-contact method, a contact method, a charging method and an electrode method, a method of providing a potential difference from one side and an opposing method from both sides of the front and back, and a combination thereof. According to the physical properties of the display medium to be used, appropriate selection may be made.

By the way, the example of FIG. 16 is a large-row system which combined the charging system (non-contact system) and the electrode system (contact system).

Moreover, the grounding number of a charger or an electrode also has various forms.

For example, in the arrangement of the three electric field applying means 182, 181, and 182 of the electrode-charger-electrode of FIG. 16, the potential charger 181 is provided (without grounding). If it is replaced with electrode, it becomes electrode method, contact method and alignment method.

In addition, when the ground roller electrodes 182 on both sides are used as the charger 181, the charging method, the non-contact method, and the row method are used.

The electrode 182 and the charger 181, the electrode 182 and the electrode 182, the charger 181 and the charger 181 can also be used as two electric field applying means.

In any of the above cases, it goes without saying that the adjacent electrodes 182 or the charger 181 are provided with different potentials (for example, ground potentials and positive or negative potentials, positive and negative potentials, and the like).

Alternatively, there may be a variety of system arrangements such as an opposing method that is inserted into the electrode 182 or the charger 181 from both front and rear surfaces of the display medium 136.

In the case where the display medium 136 may be entirely erased, an electric field may be applied to the entire display area. However, when the display medium 136 is used in a line shape such as by using a rewritable display device, the display medium 136 is perpendicular to the conveying direction of the display medium 136. In the case of a line in the direction, partial erasing is performed by applying an electric field only when the electrode 182 or the charger 181 is applied to the erase region.

As the recording device 160, recording of predetermined characters and images is performed using the thermal head 183 (head resolution: 6 dots / mm, heating amount 0.4 to 0.8 mJ / dot) used for the thermal printer.

As the erasing device 170, erasing is performed by applying the electric field applying means 181, 182 to the display surface of the display medium 136.

In the wound display device of the present invention, a configuration other than the erasing device constitutes a winding-type display device for recording only.

In this case, the display medium 113 may be removed from the wound display device of the present invention, and may be erased by means of an erasing device composed of only an erasing device.

In the wound display device of the present invention, the recording medium 113 can be provided by using a recording-only device prepared separately from the recording device.

In this case, for example, a usage form is provided in which a user only purchases a recording dedicated device provided at a newspaper store and records newspaper information on the display medium 113 there.

According to the recording medium of the embodiment, since the display unit is a display element capable of repeatedly recording and erasing visible information, it is not necessary to replace a label when changing the display content of the display unit, and to easily change the display content of the display portion. There is a number.

In addition, by displaying an image obtained by processing the video signal recorded on the recording medium on the display unit, it is possible to easily determine the recording contents of the recording medium.

Therefore, it is particularly convenient when handling a large amount of record carriers.

The wound display device of the present invention is portable and can be displayed on a large screen, and thus is suitable for the following uses, for example.

① It is possible to use newspaper information like reading a regular newspaper.

② It is suitable for displaying map information.

③ It is suitable for displaying the explanatory material of customers.

In these cases, the necessary information can be output from the storage device as needed, or new data can be input from the input unit to be output to the winding display device, thereby eliminating the inconvenience of carrying newspapers, maps, explanatory materials, or fixed information. It can be avoided.

According to the present invention, since the rewritable display medium can be wound in a roll shape, it can be miniaturized and portable.

In addition, since the display medium wound up to the winding part can be taken out and displayed for the required length, a large amount of information can be displayed at once, that is, an effect of displaying a large screen can be performed.

1 is a perspective view showing an embodiment in which the present invention is applied to a VTR cassette

Figure 2 is a perspective view along the line AA 'of Figure 1

FIG. 3 is a perspective view taken along the line AA ′ of FIG. 1 and showing another configuration example of the reversible display element; FIG.

4 is a perspective view of an indexing device;

5 is a perspective view taken along the line B-B 'of FIG.

Fig. 6 is a perspective view of the rewrite / erase mechanism of the indexing device.

7 is a perspective view of the erasing head from below;

8 is a block diagram showing the structure of an image processing circuit of the indexing apparatus;

Fig. 9 is a diagram showing the configuration of a system for recording an image recorded in a VTR cassette on a display unit;

10 is an explanatory diagram showing an example in which a display unit is divided into a plurality of areas so that display is performed for each area;

11 shows another embodiment of the present invention.

Fig. 12 is a perspective view showing an embodiment in which the present invention is applied to a storage container of a VTR cassette.

13A and 13B are conceptual views showing a wound display device according to the present invention, in which 13a shows a closed display device and 13b shows a wound display device being opened.

14A to 14C are conceptual views showing the use situation of the wound display device of the present invention. FIG. 14A shows a state before recording information on the display medium, and FIG. 14B shows a finished state in which all the information is displayed on the display medium. Fig. 14C is a diagram showing a state in which rewinding is completed after reading information.

15 is a conceptual diagram showing the configuration of a wound display device of the present invention;

Fig. 16 shows a schematic structure of a recording apparatus and an erasing apparatus in the case where a liquid crystal / polymer composite film is used for a display medium;

* Explanation of symbols for main parts of the drawings

1.VTR cassette

2a. Concave

3. Display

4. Reversible display device

5. Conductive Layer

10. Indexer

11. Cassette insertion hole

12. Operation handle

13. Display

14. Power switch

15. Leg

16. Record and erasure mechanism

17. Moving object

18. Printhead

19. Erase Head

20. Through Hole

21. Support shaft

22. Screw hole

23. Rotating shaft

24. Rotating shaft

25. Substrate

26. Voltage supply

Claims (6)

A rewritable display medium comprises a first winding part wound in a roll and a second winding part winding the display medium taken out from the first winding part; In order to record the information on the display medium at least near the display medium entrance and exit of one of the first and second windings, a heating means for heating and recording or an electric field applying means for applying recording and applying an electric field. The recording device being in either direction, and In order to erase the information recorded on the display medium, an electric field applying means is applied when an electric field is applied by the heating means for erasing, or a heating means is applied by heating when the recording is performed by an electric field applying means. A winding type display device, comprising a elimination device. The rewritable display medium is composed of a first winding part wound in roll form and a second winding part winding the display medium taken out from the first winding part, An electric field applying means for applying an electric field or erasing by heating to erase the information recorded on the display medium at least in the vicinity of the display medium entrance and exit of one of the first and second windings; A take-up display device comprising: an erasing device comprising one of the means. The rewritable display medium is composed of a first winding part wound in roll form and a second winding part winding the display medium taken out from the first winding part, A recording apparatus is provided near the entrance and exit of the display medium of the first winding part, wherein the recording device is configured to be heated to record information on the display medium, and to any one side of the heating means for performing recording or the electric field applying means for applying recording. In order to erase the information recorded on the display medium near the entrance and exit of the display medium of the second winding part, if the recording is made by the heating means, the electric field applying means which applies the electric field to perform the erasing or the recording is applied to the electric field applying means. And a erasing device provided with a heating means for heating and erasing. The method according to any one of claims 1 to 3, The display medium is recorded by the action of heat or an electric field, and when recording is performed by heat, the display medium is converted from the recording state to the erase state by the action of an electric field, or by the action of heat when recording is performed by an electric field. A wound display device which is a display medium which is converted from a state to an erase state. The wound display device according to any one of claims 1 to 4, wherein the display medium is a display medium which is a liquid crystal / polymer composite film. According to any one of claims 1 to 5, The first and second windings have a winding type display device which is characterized in that each of the driving motors for winding the display medium is provided.