JP2004188827A - Recorder for reversible multi-color recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recorder for a reversible multi-color thermal recording medium capable of recording/erasing information repeatedly. <P>SOLUTION: The recorder comprises laser light oscillating means 30, 33 and 36 for irradiating a reversible multi-color recording medium 10(70) with a plurality of laser lights having different wavelengths, a means for scanning the surface of the reversible multi-color recording medium 10(70) with laser light, a means for modulating the output of laser light selectively depending on the scanning position and recording information, and lens systems 51-53 for directing the plurality of laser lights having different wavelengths toward an optical deflector 24 from different directions wherein the reversible multi-color recording medium 10(70) is irradiated, at the same position thereof, with the plurality of laser lights deflected to different directions by the optical deflector 24. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a recording apparatus that is applied to a reversible multicolor recording medium capable of recording and erasing various data such as images, characters, and symbols in an arbitrary color tone.
[0002]
[Prior art]
In recent years, from the viewpoint of global environment, the necessity of rewritable recording technology for various recording media has been strongly recognized. For example, paperless use in offices and homes is advancing due to advances in computer network technology, communication technology, OA equipment, recording media, storage media, and the like.
[0003]
Recording media, which are one of the display media that can replace printed matter, and record and erase information reversibly by heat, so-called reversible thermosensitive recording media, are becoming popular with various prepaid cards, point cards, credit cards, IC cards, etc. It has been put to practical use in visualization and readability of balances and other recorded information, and is also being put to practical use in copying machines and printers.
[0004]
Regarding the reversible thermosensitive recording medium as described above and a recording method using the same, various proposals have been made in the past (for example, see Patent Documents 1 to 4).
In these, a so-called low-molecular dispersion type, that is, a recording medium in which an organic low-molecular substance is dispersed in a resin base material, is disclosed. To change it. Therefore, there is a disadvantage that the contrast between the image forming portion and the non-image forming portion is insufficient, and only a medium having improved contrast by providing a reflective layer under the recording layer has been put to practical use. .
[0005]
On the other hand, a leuco dye type, ie, a leuco dye, which is an electron-donating color-forming compound in a resin matrix, and a recording medium having a recording layer in which a developer and a color reducing agent are dispersed, and a recording method using the same. It is also disclosed (for example, see Patent Documents 5 to 9).
In these, an amphoteric compound having an acidic group for forming a leuco dye and a basic group for decolorizing the formed leuco dye, a phenol compound having a long-chain alkyl, or the like is used as a developing and reducing agent. Since this recording medium and recording method utilize the color development of the leuco dye itself, it has an advantage that the contrast and visibility are better than those of the low molecular dispersion type, and has recently been widely put into practical use.
[0006]
However, in the above-described prior art, only two types of colors, that is, the color of the material of the base material, that is, the color of the background, and the color discolored by heat can be expressed. In order to improve fashionability and fashionability, and to expand a practical use range, there is a great demand for displaying multicolor images and recording various data by color identification.
[0007]
In view of such problems, various recording methods that apply the above-described conventional method and display a multicolor image have been proposed.
For example, a recording medium that performs multicolor display by visualizing or concealing layers and particles coated in multiple colors with a low molecular dispersion type recording layer, and a recording method using the same have been disclosed ( For example, see Patent Documents 10 to 12.)
However, in a recording medium having such a configuration, the colored recording layer cannot completely hide the color of the surface of the lower layer, or the color of the base material is transparent, and a high contrast is obtained. It has the disadvantage that it cannot be obtained.
[0008]
Further, there is disclosed a reversible thermosensitive multicolor recording medium using a leuco dye (for example, see Patent Documents 13 and 14). However, since the recording media shown in these publications have a configuration in which repeating units having different hues are formed in one plane, the area ratio where each hue is actually recorded becomes smaller, and as a result, There is a problem that the recorded image becomes very dark or faint.
[0009]
In addition, there has been proposed a reversible thermosensitive multicolor recording medium having a configuration in which recording layers using leuco dyes having different coloring temperatures, decoloring temperatures, cooling rates, and the like are separated and formed independently. See Patent Documents 15 to 23.).
However, since these disclosed recording media perform recording or erasing by contacting a heat source such as a thermal head, it is difficult to precisely control the temperature with the heat source, and it is difficult to obtain a good contrast, There is a problem that fogging cannot be avoided.
Furthermore, when performing multi-color recording of three or more colors, control must be performed only by the difference in heating temperature and / or cooling rate after heating with a thermal head or the like, which complicates the operation and lowers the contrast. There are problems such as dripping and color fogging.
[0010]
Furthermore, in the recording method using a thermal head, since contact recording is performed on the recording medium, physical deterioration of the recording medium surface is inevitable, and recording is not possible if the recording medium surface has irregularities. There is a problem that there is a risk of becoming.
[0011]
On the other hand, as a device capable of non-contact recording, there is disclosed a recording device that performs monochromatic recording on a reversible recording medium by using a light-heat conversion effect by laser light irradiation (for example, Patent Document 24). , 25).
However, the recording apparatuses disclosed in these publications perform recording only in a single color using a laser beam of a predetermined wavelength. From a practical point of view, only a practically inferior one was obtained.
[0012]
[Patent Document 1]
JP-A-54-119377
[Patent Document 2]
JP-A-55-154198
[Patent Document 3]
JP-A-63-39377
[Patent Document 4]
JP-A-63-41186
[Patent Document 5]
JP-A-2-188293
[Patent Document 6]
JP-A-2-188294
[Patent Document 7]
JP-A-5-124360
[Patent Document 8]
JP-A-7-108761
[Patent Document 9]
JP-A-7-188294
[Patent Document 10]
JP-A-5-62189
[Patent Document 11]
JP-A-8-80682
[Patent Document 12]
JP-A-2000-198275
[Patent Document 13]
JP-A-8-58245
[Patent Document 14]
JP-A-2000-25338
[Patent Document 15]
JP-A-6-305247
[Patent Document 16]
JP-A-6-328844
[Patent Document 17]
JP-A-6-79970
[Patent Document 18]
JP-A-8-164669
[Patent Document 19]
JP-A-8-300825
[Patent Document 20]
JP-A-9-52445
[Patent Document 21]
JP-A-11-138997
[Patent Document 22]
JP 2001-162941 A
[Patent Document 23]
JP-A-2002-59654
[Patent Document 24]
JP 2001-88333 A
[Patent Document 25]
JP-A-2002-113889
[0013]
[Problems to be solved by the invention]
Accordingly, the present inventors have conducted intensive studies and, in view of the above-described problems of the related art, have set forth a deterioration of the medium on a multicolor recording medium capable of reversibly performing clear recording and erasing with clear colors. It was decided to propose a recording device capable of recording and erasing in any color tone without coming.
[0014]
[Means for Solving the Problems]
The recording apparatus for a reversible multicolor recording medium of the present invention comprises a plurality of reversible thermosensitive coloring compositions having different coloring tones in a plane direction of a supporting substrate, each of which is separately and independently provided, and a plurality of reversible thermosensitive coloring compositions are provided. The thermochromic composition contains a light-to-heat conversion material that absorbs infrared rays in different wavelength ranges and generates heat. Irradiating laser light oscillating means, scanning means for scanning the laser light on the surface of the reversible multicolor recording medium, modulating means for selectively modulating the output of the laser light according to the scanning position and recording information, And a lens system for causing a plurality of laser beams different from each other to be incident on an optical deflector constituting a scanning unit from different directions. Multicolor And that so as to irradiate the same position on the recording medium.
[0015]
The recording apparatus for a reversible multicolor recording medium of the present invention includes an information erasing means for erasing information already recorded by bringing the reversible multicolor recording medium into contact with a heat source.
[0016]
According to the present invention, information is recorded in an arbitrary color tone on a reversible multicolor recording medium capable of reversibly converting between a color-developed state and a decolored state with a simple configuration and erased. Is provided.
Further, according to the present invention, since it is possible to perform recording in a non-contact state with a reversible multicolor recording medium, even if the surface has irregularities, the recording surface is physically deteriorated. The information recording can be performed in an arbitrary color tone without generating the color tone.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a recording apparatus for a reversible multicolor recording medium according to the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.
First, an example of a reversible multicolor recording medium applied to the recording apparatus of the present invention will be described with reference to FIG. In the reversible multicolor recording medium 10, a first recording layer 11, a second recording layer 12, and a third recording layer 13 are laminated on a supporting substrate 1 via heat insulating layers 14 and 15, respectively. It has a configuration in which a protective layer 16 is formed on the uppermost layer.
[0018]
The first to third recording layers 11 to 13 are formed by applying, for example, a coating material in which a leuco dye and a developing / reducing agent are dispersed in a resin base material.
These first to third recording layers 11 to 13 are formed by using a predetermined leuco dye in accordance with a desired color to be developed. For example, in the first to third recording layers 11 to 13, If the three primary colors are developed, a full-color image can be formed on the entire reversible multicolor recording medium 10.
[0019]
It is assumed that the first to third recording layers 11 to 13 contain infrared absorbing dyes having absorptions in different wavelength ranges, respectively. In the reversible multicolor recording medium 10 of FIG. Layer 11 has wavelength λ ₁ Is transmitted to the second recording layer 12 at a wavelength λ. _Two Is transmitted to the third recording layer 13 at a wavelength λ. _Three Light-to-heat conversion material that absorbs infrared rays and generates heat.
[0020]
Next, the principle of performing multicolor recording using the reversible multicolor recording medium 10 shown in FIG. 1 will be described.
The entire surface of the reversible multicolor recording medium 10 shown in FIG. 1 is heated at a temperature at which each recording layer is erased, for example, at a temperature of about 120 ° C., and the first to third recording layers 11 to 13 are erased in advance. Leave in the color state. That is, in this state, it is assumed that the color of the support substrate 1 is exposed.
[0021]
Next, an arbitrary portion of the reversible multicolor recording medium 10 is irradiated with infrared light whose wavelength and output are arbitrarily selected by a semiconductor laser or the like.
For example, when the first recording layer 11 is colored, the wavelength λ ₁ The first recording layer 11 is irradiated with an energy of such an energy as to reach the color-developing temperature to cause the light-to-heat conversion material to generate heat and to form a color between the electron-donating color compound and the electron-donating developing / color-reducing agent. A reaction is caused, and the irradiated portion is colored.
Similarly, for the second recording layer 12 and the third recording layer 13, the wavelength λ _Two , Λ _Three Irradiation of energy to reach the color-developing temperature can be applied to each light-to-heat conversion material to generate heat, thereby causing the irradiated portion to develop color. In this manner, an arbitrary portion of the reversible multicolor recording medium 10 can be colored, and a full-color image can be formed and various information can be recorded.
[0022]
Further, the entirety of the reversible multicolor recording medium 10 partially colored as described above is uniformly heated at a temperature at which all the recording layers are decolorized, for example, at 120 ° C. Information and images can be erased, and recording can be repeated by repeating the above operation.
[0023]
Next, another example of the reversible multicolor recording medium applicable to the recording apparatus of the present invention will be described with reference to FIG.
In the reversible multicolor recording medium 70 shown in FIG. 2, a first chromogenic composition 18, a second chromogenic composition 82, and a third chromogenic composition 83 are respectively encapsulated on a support substrate 71. A recording layer 84 in which the formed microcapsules 72 are arranged in a plane is formed, and a protective layer 85 is formed on the recording layer 84.
[0024]
As the support substrate 71, the same substrate as the support substrate 1 of the reversible multicolor recording medium 10 shown in FIG. 1 can be applied.
[0025]
As the first to third color forming compositions 81 to 83, a material capable of performing stable repetitive recording and capable of controlling a decolored state and a colored state is used.
The first to third color-forming compositions 81 to 83 include the reversible feelings contained in the first to third recording layers 11 to 13 constituting the reversible multicolor recording medium 10 shown in FIG. It is assumed that the same thermochromic composition can be applied, and infrared rays having different wavelengths (λ ₁ , Λ _Two , Λ _Three ) Is included, and a light-to-heat conversion material that generates heat by absorbing) is included.
[0026]
These first to third color-forming compositions 81 to 83 can be, for example, those in which a leuco dye and a developer / reducer are dispersed in a resin base material as required.
The first to third color-forming compositions 81 to 83 each use a predetermined leuco dye according to a desired color to be colored. For example, in the first to third color-forming compositions 81 to 83, By forming the three primary colors, a full-color image can be formed on the entire reversible multicolor recording medium 70.
[0027]
As the leuco dye, as in the case of the reversible multicolor recording medium 10 shown in FIG. 1, existing dyes for thermal paper can be used. Organic acids having a chain alkyl group (described in JP-A-5-124360, JP-A-7-108761, JP-A-7-188294, JP-A-2001-105733, JP-A-2001-113829, etc. ) Etc. can be applied.
[0028]
It is assumed that the first to third color forming compositions 81 to 83 each contain an infrared absorbing dye having absorption in a different wavelength range, and the first color forming composition 81 has a wavelength λ. ₁ Of the second color-forming composition 82 at a wavelength λ _Two The third color-forming composition 83 emits the wavelength λ _Three Light-to-heat conversion material that absorbs infrared rays and generates heat.
As the light-heat conversion material, a phthalocyanine dye, a cyanine dye, a metal complex dye, a diimmonium dye, and the like, which are generally used as an infrared absorbing dye having little absorption in a visible wavelength region, can be applied. Furthermore, in order to generate heat only from an arbitrary light-to-heat conversion material, it is preferable to select a combination of materials having a narrow absorption band of the light-to-heat conversion material and not overlapping each other.
[0029]
Examples of the resin for forming the first to third color forming compositions 81 to 83 include polyvinyl chloride, polyvinyl acetate, a vinyl chloride-vinyl acetate copolymer, ethyl cellulose, polystyrene, a styrene-based copolymer, and a phenoxy resin. , Polyester, aromatic polyester, polyurethane, polycarbonate, polyacrylate, polymethacrylate, acrylic acid copolymer, maleic acid polymer, polyvinyl alcohol, modified polyvinyl alcohol, hydroxyethyl cellulose, carboxymethyl cellulose, starch, etc. Can be used. If necessary, various additives such as an ultraviolet absorber may be used in combination with these resins.
Alternatively, a leuco dye, a developer / reducer, and an infrared absorbing dye may be encapsulated in the microcapsules 72 without using the above resin.
[0030]
The partition member forming the recording layer 84 in FIG. 2 is not limited to a microcapsule, but may be a capillary or a cell capable of enclosing a dispersion medium, and may form a microvoid structure. Then it is not limited at all. Further, the resolution of the display device can be increased by making the void structure portion finer.
[0031]
The microvoid structure such as microcapsules may be dispersed in a predetermined binder, and in this case, a water-based binder, a solvent-based binder, an emulsion-based binder, or the like can be used as the binder.
In addition, the recording layer 84 can be formed by applying a paint prepared by dispersing the microvoid structure in the resin using a predetermined solvent on the support substrate 71.
The recording layer 84 is preferably formed to have a thickness of about 1 to 20 μm, and more preferably to be about 3 to 15 μm. If the film thickness of the recording layer 84 is too small, a sufficient coloring density cannot be obtained. Conversely, if the recording layer 84 is too thick, the heat capacity of the recording layer 84 becomes large, thereby deteriorating the coloring and decoloring properties.
[0032]
The protective layer 85 can be formed using a conventionally known ultraviolet-curable resin or thermosetting resin, holds the recording layer 84 formed on the support substrate 71, and externally forms a minute void structure (FIG. In order to see the color forming composition in the microcapsule inside, a material having a light transmitting property and a mechanical strength necessary for practical use is applied. The thickness of the protective layer 85 is desirably about 0.1 to 20 μm, and more preferably about 0.5 to 5 μm.
[0033]
Next, a method for manufacturing the reversible multicolor recording medium 70 shown in FIG. 2 will be described. In the following, a core material containing the above-described leuco dye, a developer / reducer, an infrared absorbing dye, etc. A configuration in which a microcapsule covered with a shell material and microencapsulated is arranged on a support substrate 71 will be described as an example.
[0034]
The method for producing such microcapsules includes a phase separation method in which a concentrated phase of a polymer is separated around a core material composed of a dispersion medium dispersed in a polymer solution, a curing test of a polymer around a core material in a polymer solution. In-liquid curing coating method in which the polymer is cured by chemicals, etc., in-situ weight covering the surface of the core material with polymer by supplying a monomer or polymerization catalyst from either the inner phase or the outer phase of the emulsion in which the core material is dispersed Suitable methods include, but are not limited to, microencapsulation techniques such as an interfacial polymerization method in which monomers are supplied from both an inner phase and an outer phase of an emulsion in which a core substance is dispersed.
In particular, by manufacturing using an in-situ polymerization method or a phase separation method, microcapsules having a uniform particle size and in which colored magnetic particles are uniformly dispersed can be manufactured. As the polymerizable monomer used here, acrylates, methacrylates, styrene, and derivatives thereof, isocyanates, various amines, compounds having an epoxy group, and the like are preferable.
The resins used for the microcapsules include commonly used resins such as acrylic resins, methacrylic resins, polystyrene, polyester resins, polyurethane resins, polyurea resins, polyamide resins, epoxy resins, and natural resins. May be used alone or in combination of two or more.
[0035]
The recording layer 84 and the protective layer 85 may be formed by a known printing method such as an offset printing method, a gravure printing method, a silk screen printing method, or a coating method such as a roll coating method or a knife edge method, or the above-described micro-printing method. A transfer method using a transfer sheet having a transfer layer containing capsules, an ink jet method in which ink containing the above-described microcapsules is sprayed onto a substrate, and a solution containing the above-described microcapsules mixed between a supporting substrate and a protective layer. It can be manufactured by a forming method such as a method of performing, and can be appropriately selected from the above-described methods according to the use and the number of the information recording medium to be manufactured.
[0036]
Next, the principle of performing multicolor recording using the reversible multicolor recording medium 70 shown in FIG. 2 will be described.
First, the first principle will be described.
The entire surface of the reversible multicolor recording medium 70 shown in FIG. 2 is heated at a temperature at which each color-forming composition is decolorized, for example, at a temperature of about 120 ° C., and the first to third color-forming compositions 81 to 83 is set in a decolored state in advance. That is, in this state, it is assumed that the color of the support substrate 71 is exposed. Next, an arbitrary portion of the reversible multicolor recording medium 70 is irradiated with infrared light whose wavelength and output are arbitrarily selected by a semiconductor laser or the like.
For example, when the first coloring composition 81 is colored, the wavelength λ ₁ Is irradiated with energy at which the first color-forming composition 81 reaches the color-forming temperature to cause the light-to-heat conversion material to generate heat, thereby causing the electron-donating color compound and the electron-donating developer / subtractor to emit light. A color development reaction is caused to cause the irradiated portion to develop color.
Similarly, the second color-forming composition 82 and the third color-forming composition 83 also have a wavelength λ, respectively. _Two , Λ _Three Is irradiated with energy to reach the coloring temperature to cause each light-to-heat conversion material to generate heat, thereby causing the irradiated portion to develop color.
In this manner, an arbitrary portion of the reversible multicolor recording medium 70 can be colored, and a full-color image can be formed and various information can be recorded as a whole.
[0037]
Further, the recording layer 84 colored as described above is further irradiated with an infrared ray having an arbitrary wavelength at an energy such that the first to third coloring compositions 81 to 83 reach the decoloring temperature, and -The color can be decolorized by causing the heat conversion material to generate heat to cause a decolorization reaction between the electron-donating color developing compound and the electron-donating color developing and reducing agent.
[0038]
Furthermore, by heating the entire reversible multicolor recording medium 70 partially colored as described above at a temperature at which all the color-forming compositions are decolorized, for example, at 120 ° C. The recording information and the image can be erased, and the recording can be repeatedly performed by performing the above-described arbitrary operation.
[0039]
Next, the second principle of multicolor recording will be described.
The reversible multicolor recording medium 70 shown in FIG. 2 is heated over the entire surface at a temperature at which each color-forming composition develops color, for example, at a high temperature of about 200 ° C., and then cooled to obtain the first to third color-forming compositions. All of the color filters 81 to 83 are set in a colored state in advance.
Next, an arbitrary part of the reversible multicolor recording medium 70 is irradiated with an infrared ray whose wavelength and output are arbitrarily selected by a semiconductor laser or the like.
For example, when the first color-forming composition layer 81 is decolorized, the wavelength λ ₁ Is irradiated with energy enough to cause the first color-forming composition 81 to lose color, causing the light-to-heat conversion material to generate heat and bring the color-forming composition 81 into a decoloring state.
Similarly, the second color-forming composition layer 82 and the third color-forming composition 83 also have a wavelength λ, respectively. _Two , Λ _Three Irradiation with the energy of about the decoloring temperature to cause each light-to-heat conversion material to generate heat, thereby decolorizing the irradiated portion.
[0040]
In this manner, an arbitrary portion of the reversible multicolor recording medium 70 can be erased, and a full-color image can be formed and various information can be recorded.
Further, the recording layer 84 colored as described above is further irradiated with infrared rays having an arbitrary wavelength at an energy such that the first to third coloring compositions 81 to 83 reach the coloring temperature. By causing the heat conversion material to generate heat to cause a color-forming reaction between the electron-donating color-forming compound and the electron-donating developing / reducing agent, the color can be formed.
[0041]
Further, the entirety of the reversible multicolor recording medium 70 partially decolorized as described above is uniformly heated at a temperature at which all the color forming compositions are colored, for example, 200 ° C., and then cooled. By doing so, recorded information and images can be erased, and repeated recording is possible.
[0042]
Next, the recording apparatus of the reversible multicolor recording medium of the present invention will be described with reference to examples.
FIG. 3 is a schematic configuration diagram of an example of a recording apparatus for a reversible multicolor recording medium according to the present invention. FIG. 4 is a plan view of a main part of the recording apparatus shown in FIG. 3 as viewed from above in FIG. FIG. 5 is a state diagram showing a main part of the recording apparatus shown in FIG. 3 as viewed from the side.
[0043]
The recording device 100 is controlled by a control unit 39 that issues a control signal for appropriately operating each component. The control unit 39 includes a display unit 38 and an operation unit 40. An arbitrary command is sent to the control unit 39 via the operation unit 40, and the display unit 38 displays a desired operation state or operation state. Information is displayed.
[0044]
Reference numerals 30, 33, and 36 denote laser light oscillating means having different oscillation wavelengths, and can be driven by a laser driver 37 according to a control signal from a control unit 39. The laser light oscillating means 30, 33, and 36 have the number of recording layers 11 to 13 included in the reversible multicolor recording medium 10 or the number of types of microcapsules included in the reversible multicolor recording medium 70. That is, they are provided corresponding to the number of types of light-to-heat conversion materials that absorb infrared light having an arbitrary wavelength.
In the present embodiment, a recording apparatus having a configuration in which laser light oscillating means is provided at three locations corresponding to the reversible multicolor recording medium 10 (70) will be described, but the present invention is not limited to this example. Instead, for example, it is also possible to provide a plurality of laser light oscillating means for oscillating the same wavelength in order to speed up information recording.
[0045]
The oscillation wavelengths of the laser light oscillating means 30, 33, and 36 determine the recording layers 11 to 13 constituting the reversible multicolor recording medium 10 of FIG. 1 and the recording layer 84 of the reversible multicolor recording medium 70 of FIG. It is assumed that the wavelength corresponds to the absorption band of the light-to-heat conversion material contained in each of the microcapsules. ₁ , Λ ₂ , Λ _Three It is.
It is preferable to use a semiconductor laser for the laser light oscillating means 30, 33, 36 in consideration of the selectivity of the oscillation wavelength, cost, ease of modulation, and the like.
[0046]
The laser light oscillated from the laser light oscillating means 30, 33, 36 is converted into a parallel light beam by collimating lenses 29, 32, 35, and by the cylindrical lenses 28, 31, 34, etc., depending on the used optical deflector. The shape is shaped.
[0047]
The first to third laser beams 41, 42, and 43 oscillated from the laser beam oscillating units 30, 33, and 36, respectively, form a lens system 51 including the collimating lenses 29, 32, and 35 and the cylindrical lenses 28, 31, and 34. , 52, and 53, and enters the optical deflector 24.
The light deflector 24 can be driven by a light deflection driving unit 25 according to a control signal from a control unit 39. As the optical deflector 24, a polygon mirror scanner or a galvanometer mirror scanner generally used for scanning a laser beam can be applied.
The laser beams 41, 42, and 43 are shaped and used according to the optical deflector to be applied.
[0048]
As an example, when a polygon mirror is applied to the optical deflector 24, the tilt of the polygon mirror is corrected, and the laser beams 41 incident on the optical deflector (polygon mirror) from different directions as shown in FIG. , 42, 43 irradiate the same position on the reversible multicolor recording medium 10 (70) so that the cylindrical lenses 28, 31 are condensed on the polygon mirror surface in the non-scanning direction of the laser light. , 34 are adjusted.
[0049]
Each laser beam is irradiated to the reversible multicolor recording medium 10 (70) via the irradiation position control means 23, for example, the focus position correction means and the surface tilt correction lens system.
The irradiation position control unit 23 composed of a focal position correction unit and a surface tilt correction lens system uses a plurality of lenses such as an f-θ lens, a cylindrical lens, a toroidal lens, or is a single lens having those functions. The laser irradiation position, spot shape, and scanning speed on the reversible multicolor recording medium are corrected here.
Further, a free-form surface mirror for adjusting the focal length may be used as a part of the irradiation position control unit 23 including the focal position correction unit and the surface tilt correction lens system.
By applying the above-described lens, as shown in FIG. 5, the laser beams 41, 42, and 43 incident on the optical deflector 24 from different directions are respectively transmitted to the reversible multicolor recording medium 10 (70). Irradiation can be made to the same place.
[0050]
The laser beams 41 to 43 are composed of lens systems 61, 62, 63 each of which is a combination of cylindrical lenses 28, 31, 34 and collimating lenses 29, 32, 35, an optical deflector 24, and a driving unit 21. The reversible multicolor recording medium 10 (70) is scanned by a scanning means. That is, scanning is performed in the direction of arrow A shown in FIG. The reversible multicolor recording medium 10 (70) is conveyed in the depth direction in FIG. 3, that is, in the left-right direction in FIG. 5, by the conveyance means 20 operable by the drive unit 21 controlled by the control unit 39. Therefore, a predetermined range on the reversible multicolor recording medium 10 (70) can be irradiated with laser light.
[0051]
Reference numeral 45 in FIG. 3 denotes a synchronizing signal generator. The laser beam is reversible based on the synchronizing signal generator 45, the rotation speed of the polygon mirror constituting the optical deflector 24, and the position of the conveying means 20. It is determined which position of the color recording medium 10 (70) is irradiated, and the laser output is modulated by the laser driver 37 in accordance with the position where the laser light is irradiated. It is possible to record arbitrary information at an arbitrary position on 10 (70).
[0052]
In the example of the reversible multicolor recording medium 10 shown in FIG. ₁ Is irradiated with energy at which the first recording layer 11 reaches the color development temperature, the light-to-heat conversion material generates heat, and the electron-donating color compound and the electron-donating developer / color reducing agent A coloring reaction occurs during the reaction, and the irradiated portion develops color.
Similarly, for the second recording layer 12 and the third recording layer 13, the wavelength λ _Two , Λ _Three Is irradiated with energy that reaches the coloring temperature, each light-to-heat conversion material generates heat, and the irradiated portion develops color.
The reversible multicolor recording medium 70 shown in FIG. ₁ , Λ _Two , Λ _Three By irradiating the infrared rays with a predetermined energy, an arbitrary microcapsule can be colored.
[0053]
Then, in accordance with a predetermined irradiation position of each of the laser beams 41 to 43 on the reversible multicolor recording medium, a control signal from the control section 39 causes each of the laser beams 41 to 43 to be transmitted via the laser driver 37. Is modulated according to arbitrary information, desired recording is performed on the reversible multicolor recording medium 10.
[0054]
Reference numeral 46 in FIG. 5 denotes recording / erasing means for erasing a signal recorded on a recording medium. The recording / erasing means 46 is assumed to be a heating source, and a metal, a ceramic bar, a heat-resistant rubber roller, or the like can be used.
Before recording information on the reversible multicolor recording medium 10 (70), the signal information can be erased by bringing the reversible multicolor recording medium 10 (70) into contact with the heat source 46. Can be recorded.
[0055]
【The invention's effect】
According to the present invention, information can be recorded in an arbitrary color tone by scanning within a predetermined range on the surface of a reversible multicolor recording medium while modulating laser light of a plurality of wavelengths in accordance with recording information. A recording device capable of performing the above is provided.
[0056]
According to the recording apparatus of the present invention, recording can be performed in a non-contact state with a reversible multicolor recording medium. Information could be recorded without causing physical deterioration on the surface of the multicolor recording medium.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of an example of a reversible multicolor recording medium applied to the apparatus of the present invention.
FIG. 2 is a schematic sectional view of another example of a reversible multicolor recording medium applied to the apparatus of the present invention.
FIG. 3 is a schematic configuration diagram of a recording apparatus for a reversible multicolor recording medium of the present invention.
FIG. 4 is a state diagram of a main part of a recording apparatus for a reversible multicolor recording medium according to the present invention as viewed from above.
FIG. 5 is a side view of a main part of a recording apparatus for a reversible multicolor recording medium of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Support substrate, 10 ... Reversible multicolor recording medium, 11 ... First recording layer, 12 ... Second recording layer, 13 ... Third recording layer, 14, 15 ... Heat insulation layer .., 16... Protective layer, 20... Transporting means, 21... Driving unit, 23... Irradiation position control means (laser focal position correcting means, surface tilt correction lens system), 25. .., 31, 34... Cylindrical lenses, 29, 32, 35. .., 40... Operating part, 41, 42, 43... Laser light, 45... Synchronization signal generator, 46... Recording / erasing means (heating source), 51, 52, 53. Multicolor recording medium, 71... Support substrate, 72. Cell, 81: first color-forming composition, 82: second color-forming composition, 83: third color-forming composition, 84: recording layer, 85: protective layer, 100 Recording device

Claims (4)

In the plane direction of the supporting substrate, a plurality of reversible thermosensitive coloring compositions having different coloring tones are provided separately and independently, and the plurality of reversible thermosensitive coloring compositions are respectively different in wavelength ranges. For a reversible multicolor recording medium that contains a light-heat conversion material that absorbs infrared rays and generates heat,
Laser light oscillation means for irradiating a plurality of laser lights having different wavelengths,
Scanning means for scanning the laser light on the surface of the reversible multicolor recording medium,
A modulating means for selectively modulating the output of the laser light in accordance with the scanning position and the record information,
A plurality of laser beams having different wavelengths from different directions, and a lens system for entering an optical deflector constituting the scanning unit,
A recording apparatus for a reversible multicolor recording medium, wherein laser beams deflected in different directions from the optical deflector are irradiated to the same position on the reversible multicolor recording medium. 2. The reversible multicolor recording medium according to claim 1, further comprising information erasing means for erasing the recorded information by bringing said reversible multicolor recording medium on which information is recorded in advance into contact with a heat source. A recording device for a recording medium. The recording apparatus for a reversible multicolor recording medium according to claim 1, further comprising a conveyance unit configured to convey the reversible multicolor recording medium. The recording apparatus for a reversible multicolor recording medium according to any one of claims 1 to 3, wherein a light source of the laser light is a semiconductor laser that oscillates in a red or near infrared region wavelength.

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