JP2003211733A - Information recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recorder which can carry out an information recording process highly accurately in a short time to a recording display medium to which information is recorded by application of light. <P>SOLUTION: An information processing apparatus carries out the information recording process to the recording display medium to which information is recorded through application of light. The apparatus is provided with a light source for radiating light of at least one kind of infrared rays, visible lights and ultraviolet rays, and a reflecting mirror device. The reflecting mirror device has a reflecting mirror group comprising a plurality of minute reflecting mirrors arranged in either an array form or a matrix form and is configured to form a light image pattern by making a reflection direction of light from the light source which is brought into each of minute reflecting mirrors in the reflecting mirror group controlled separately for each minute reflecting mirror. Light from the reflecting mirror device is applied to the recording display medium. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus that records information on a recording / display medium by irradiating light.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for recording information on a sheet-shaped recording / display medium, a thermal paper, which is colored from white to black when heated, is used as the recording / display medium. A thermal head to convert,
A thermal information recording device that includes a switching element that controls a heat sensitive point and that performs information recording processing that records information by heating a thermal paper that is a recording display medium by contacting it with a thermal head is widely used. .

However, recently, it has been required to increase the pixel density of information recorded on a recording / display medium, but in the thermal information recording apparatus, wiring is required to obtain electric energy, In order to increase the pixel density in the information to be recorded, it is necessary to increase the wiring density of the wiring, so that the device itself becomes large and expensive. Further, it has been studied to prevent the device itself from becoming large by making the wiring thin, but the wiring is likely to generate heat, which may reduce the safety of the device.

Therefore, as a device for recording information on a recording / display medium, for example, a recording / display medium made of an organic photochromic material whose hue reversibly changes when irradiated with light is used, and light emitted from a light source is used. An apparatus having a configuration for performing information recording processing by irradiating a recording and display medium has been studied.

However, in order to put such a device into practical use, there are the following problems (1) and (2), for example.

(1) The ultraviolet laser irradiation device used as a light source is expensive, and a control device such as a polygon mirror is required to pattern the light emitted from the ultraviolet laser irradiation device. Because,
The device itself becomes large-scale. Furthermore, since the information recording process is performed by scanning the laser light on the recording / display medium, the time required for the information recording process becomes long. (2) In order to pattern the light emitted from the light source,
When a transmissive image forming means made of liquid crystal is used, the liquid crystal is an organic substance and easily deteriorates, so that its transmission efficiency is reduced, and information cannot be recorded with high accuracy.

[0007]

The present invention has been made based on the above circumstances, and its purpose is to:
An object of the present invention is to provide an information recording apparatus capable of performing information recording processing with high accuracy and in a short time on a recording display medium on which information is recorded by being irradiated with light.

[0008]

The information recording apparatus of the present invention is an information recording apparatus for performing an information recording process on a recording display medium on which information is recorded by irradiation of light,
A light source that emits light of at least one of infrared rays, visible light, and ultraviolet rays, and a reflecting mirror group in which a plurality of minute reflecting mirrors are arranged in either an array shape or a matrix shape. A reflecting mirror device configured to form an optical image pattern by individually controlling the reflection direction of the light from the light source that is incident on each of the minute reflecting mirrors in the group. The recording display medium is provided with the light from the reflecting mirror device.

In the information recording apparatus of the present invention, when a sheet capable of recording information on both sides thereof is used as a recording / display medium, double-sided processing for performing information recording processing on both sides of the sheet which is the recording / display medium. It is preferable to have a mechanism.

In the information recording apparatus of the present invention, when a rewritable sheet capable of repeating recording of information and erasing of recorded information is used as a recording / display medium, the information in the rewritable sheet is recorded. It is preferable to have an erasing processing unit that performs a recording erasing process on one surface.

In the information recording apparatus of the present invention, the recording / display medium has a plurality of colors as latent colors, and these latent colors are arranged in a pattern corresponding to the information to be recorded. A color sheet on which information is recorded is realized by irradiating a pattern having a latent color with light having a pattern corresponding to information. This information recording apparatus is provided with light irradiation position control means for controlling the irradiation position of light on the color sheet for which information recording processing is to be performed thereafter, based on the coloring state of one color sheet on which information is recorded. Is preferred.

[0012]

According to the information recording apparatus of the present invention, the light emitted from the light source is applied to the recording / display medium through the reflecting mirror device, but the reflecting mirror device has a plurality of minute reflecting mirrors arranged in an array. Alternatively, it is composed of a group of reflecting mirrors arranged in a matrix, and since the reflection direction of the light emitted from the light source in each of these minute reflecting mirrors is controlled individually, it is based on the data of the information to be recorded. Since the light can be patterned with high accuracy and the optical image pattern can be irradiated onto the recording / display medium, it is possible to perform the information recording process on the recording / display medium with high accuracy and in a short time. You can

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below.

(First Embodiment) FIG. 1 is an explanatory diagram showing an example of the configuration of an information recording apparatus of the present invention. The information recording apparatus in FIG. 1 uses a sheet body having a characteristic of causing a hue change in the light-irradiated portion as a recording / display medium by irradiating light, and irradiates the sheet body with an optical image pattern. The information is recorded according to the following.

This information recording apparatus has a recording processing section 10 for recording information on a sheet body supplied to a processing stage 11 made of, for example, flat glass, and
With respect to the recording processing sheet body supply unit 16 that supplies the sheet body to the recording processing unit 10, the reflecting mirror device 20 that irradiates the recording processing unit 10 with the optical image pattern, and the reflecting mirror device 20. It has a light introducing portion 23 that forms an optical path for entering the light emitted from the light source.

The recording processing sheet body supply section 16 includes a cassette 18 for stacking sheet bodies, and the cassette 18.
Therefore, the processing stage 11 in the recording processing unit 10 has a pair of rollers 17 forming a sheet body supply port for supplying the sheet body P1. A pair of rollers 17
In the driven state, each of them rotates in a direction in which the abutting portion moves downward (downward in FIG. 1). In FIG. 1, the stacked sheets are shown inside the cassette 18.

In the light introducing section 23, an integrator lens 26 is arranged on the optical path of the light emitted from the light source constituted by the light emitting means including the lamp 24 provided with the condenser mirror 25. A flat reflecting mirror 27 is provided on the optical path of the light transmitted through the integrator lens 26, and a condenser lens 28 is provided on the optical path of the light reflected by the flat reflecting mirror 27.

Then, an optical image pattern is formed on the optical path of the light transmitted through the condenser lens 28 in the light supply section 23 by patterning the incident light based on the data of the information to be recorded on the sheet body. However, a reflecting mirror device 20 that emits the patterned light in a direction toward the processing stage 11 in the recording processing unit 10 is provided. In this information recording device, the patterned light emitted from the reflecting mirror device 20 is processed by the processing stage 1 in the recording processing unit 10 via the projection lens 22.
1 is configured to be irradiated as a light image pattern.

As the light source, a light emitting means for emitting at least one kind of infrared ray, visible light and ultraviolet ray is used. Specifically, examples of the light emitting means include lamps such as an infrared lamp, a visible light lamp, an ultraviolet lamp, a mercury lamp, and a xenon lamp, a laser irradiation device such as an infrared laser, a visible light laser, an ultraviolet laser, and LE.
D or the like can be used. In this example, a light emitting means including a lamp 24 and a condenser mirror 25 is used, an ellipsoidal mirror is used as the condenser mirror 25, and the first focal point of the lamp 24 is the lamp 24. The second focus is located in the discharge vessel of the integrator lens 2
Located within 6.

The integrator lens 26 is made of a rectangular columnar glass rod and is used as a beam homogenizer.

As shown in FIG. 2, the reflecting mirror device 20 comprises a reflecting mirror group in which a plurality of minute reflecting mirrors 21 are arranged two-dimensionally vertically and horizontally, that is, in a matrix, and the reflecting mirror group. The reflecting direction control means (not shown) for individually controlling the reflecting direction of the light of the light source incident on each of the minute reflecting mirrors 21 is provided.

Each of the minute reflecting mirrors 21 constituting the reflecting mirror group is provided with a rectangular minute mirror surface having a size of, for example, 16 μm in length and 16 μm in width, and the tilted state of the mirror surface is at a plurality of angles. It changes to.

In this reflecting mirror device 20, based on the data of information to be recorded on the sheet member P1, the reflection direction control means, for example, minute reflection corresponding to a position where light is not required to form an optical image. The mirror surface of the mirror 21 is tilted so that the reflected light is guided in a direction other than the direction toward the processing stage 11 in the recording processing unit 10, and each of the minute reflecting mirrors 21 constituting the reflecting mirror group is formed. By setting and fixing the tilt state of the mirror surface, its reflection direction is controlled. Thereby, the light emitted in the direction toward the processing stage 11 in the recording processing unit 10 can be patterned to form a desired optical image pattern. Specifically, as the reflecting mirror device 20, a reflective control element can be preferably used.

The reflective control element may be, for example, a digital micromirror device (DMD) or a MEMS (Mic).
ro Electro Mechanical Sys
tems) display, MEMS optical switch (all IEEE SPECTRUMNOVEMBER, O
plus E October 1994, J. Soc. Jpn
Vol43, No2, 2000, J. IEEE, Ja
pan, VOL120, NO11, etc.) and the like.

Such a reflective control element is, for example, C-
MOS (CERES Manufacturing Out)
-Sourcing System) On the surface of a semiconductor circuit chip, hundreds of thousands or more of minute reflecting mirrors are arranged vertically and horizontally as a reflection type optical modulator, and each of the reflection type optical modulators is For example, it is configured to be rotated by electrostatic attraction via an electric signal.

The information recording apparatus having such a configuration is brought into an operating state, for example, when a power switch is turned on. However, in the recording processing sheet supply section 16,
The pair of rollers 17 forming the sheet supply port are driven, and thereby the sheet P1 is supplied from the cassette 18 to the processing stage 11 in the recording processing unit 10.

In the light introducing section 23, for example, the lamp 24 is turned on in synchronization with the supply of the sheet P1 to the recording processing section 10, and the light is emitted from the lamp 24 and collected by the condenser mirror 25. The emitted light is guided to the incident end 26A of the integrator lens 26. And
The light in the state of being uniformized by the integrator lens 26 emits light 26B of the integrator lens 26.
The emitted light reaches the plane reflecting mirror 27, and the light reflected by the plane reflecting mirror 27 enters the reflecting mirror device 20 via the condenser lens 28.

In the reflecting mirror device 20, the incident light is patterned based on the data of the information to be recorded, and the optical image pattern formed by the light emitted in the direction toward the processing stage 11 in the recording processing section 10 is formed. It is irradiated to the processing stage 11 in the recording processing unit 10 via the projection lens 22. As described above, one surface of the sheet body P1 (see FIG.
Information is recorded by irradiating an optical image pattern formed by the patterned light to the lower surface in FIG.

According to the information recording apparatus as described above, the light emitted from the light source composed of the light emitting means constituted by the lamp 24 and the condenser mirror 25 is transferred to the recording processing unit 10 via the reflecting mirror unit 20. Although the sheet P1 supplied to the processing stage 11 is irradiated, the reflecting mirror device 20
Is composed of a group of a plurality of micro-reflecting mirrors 21 arranged vertically and horizontally (in a matrix), and the reflection direction of the light emitted from the light source in each of these micro-reflecting mirrors 21 corresponds to the information to be recorded. Since it is individually controlled by the reflection direction control means based on the data, the light can be patterned with high accuracy based on the data of the information to be recorded on the sheet body P1, and this optical image pattern can be formed on the sheet body. It is possible to irradiate P1. Therefore, information can be recorded on the sheet P1 with high accuracy and in a short time. In practice, this information recording apparatus does not need to scan light on the sheet body, so-called surface irradiation, as compared with an apparatus configured to record information by directly irradiating the sheet body with a laser. Therefore, it is possible to record information in a short time.

When a reflection type control element is used as the reflection mirror device 26, the micro-reflecting mirror which constitutes this reflection type control element can form an irradiation point of a few tenths of a micron, so that, for example, on a sheet body. Compared to an apparatus or the like configured to record information by directly irradiating a laser beam, the information recording process of the reflecting mirror device 26 can obtain information having an image with high accuracy. Further, since the light utilization rate of the micro-reflecting mirror is high and the shape of the micro-reflecting mirror is rectangular, the irradiation points adjacent to each other, which are required when the irradiation points are round, as in laser irradiation, are required. The overlapping exposure for filling the gaps is unnecessary, and the exposure time can be shortened.

(Second Embodiment) FIG. 3 is an explanatory diagram showing another example of the configuration of the information recording apparatus of the present invention. In the information recording apparatus in FIG. 3, when light is irradiated, the light-irradiated portion causes a hue change, and when the light-irradiated portion causes the hue change, the hue of the portion is changed. The rewritable sheet that can repeat recording of information and erasing of recorded information is used as a recording / display medium because it has a property of returning to the above.

The information recording apparatus can perform information recording processing on a rewritable sheet (hereinafter also referred to as "unrecorded sheet body") in a state where information is not recorded, and information is irradiated by light. The rewritable sheet in which is recorded (hereinafter, also referred to as “recorded sheet body”) can be subjected to the information erasing process, and except the points (1) to (4) below, It has the same configuration as the embodiment.

(1) An erasing processing section 30 for performing a recording erasing process on the recorded sheet P2 supplied on a processing stage 31 made of flat glass or the like is provided. In the erasing processing section 30, the processing stage 31
A heat roller 32 that is heated by the light emitted from the reflecting mirror device 20 is provided below (below in FIG. 3). The heat roller 32 is brought into contact with the processing stage 31 when the recording erasing process is performed in the erasing processing unit 30.

(2) An erasing processing sheet body supply section 36 for supplying the recorded sheet body P2 to the recording and erasing section 30 is provided. The erasing processing sheet body supply unit 36
A cassette 38 for stacking recorded sheets, and a recorded sheet in a state in which one surface on which information is recorded is downward (downward in FIG. 3) from the cassette 38 to the processing stage 31 in the recording / erasing unit 30. A sheet body supply port for supplying the body P2 is formed, and has a pair of rollers 37 that rotate in a direction in which abutting portions move downward (downward in FIG. 3) in a driven state. There is. In FIG. 3, a recorded sheet body in a stacked state is shown inside the cassette 38.

(3) In the recording processing unit 10, the pair of rollers 17 forming the sheet supply port are rotated in the direction in which the abutting portions move downward (downward in FIG. 3). The sheet body that has been subjected to the record erasing process in the erasing processing unit 30 by supplying the unrecorded sheet body P1 to the processing unit 10 and rotating the contacting portion in a direction moving upward (upward in FIG. 3). Is supplied to the cassette 18 in the recording processing sheet body supply unit 16 as an unrecorded sheet body.

(4) In the light introducing section 23, of the light emitted from the reflecting mirror device 20, the light other than the light forming the optical image pattern applied to the processing stage 11 in the recording processing section 10 is the erasing processing section. The heat roller 32 at 30 is configured to be illuminated.

In the information recording apparatus having such a configuration, in parallel with the information recording processing in the recording processing section 10,
The erasing processing section 30 can perform a recording erasing process. Specifically, in synchronization with the roller 17 of the recording processing sheet supply unit 16, the roller 37 constituting the sheet body supply port of the erasing processing sheet body supply unit 36 is driven, whereby the erasing processing unit 30 is driven. To the processing stage 31 in
The recorded sheet body P2 is supplied from the cassette 38 of the erasing processing sheet body supply unit 36. Then, the recorded sheet P2 supplied to the processing stage 31 is heated by being irradiated with the light emitted from the reflecting mirror device 20, and is heated by the heat roller 32 brought into contact with the processing stage 31. It Furthermore, the erasure processing unit 30
The sheet body on which the information erasing process is performed in the state where no information is recorded is supplied to the cassette 18 of the recording processing sheet body supplying unit 16 via the roller 17 of the recording processing sheet body supplying unit 16. .

In the information recording apparatus, for example, (1) the heating condition by the heat roller 32 is adjusted, and (2) the unrecorded sheet body P1 by the recording processing sheet body supply unit 16.
By controlling the supply speed of the recording sheet P2 and the supply speed of the recorded sheet body P2 by the erasing processing sheet body supplying section 36, and the information erasing processing in the erasing processing section 30. The time required can be controlled appropriately.

According to the information recording apparatus as described above, the first
It is possible to obtain the same effects as those of the information recording apparatus according to the embodiment. Further, in the erasing processing section 30, of the light emitted from the reflecting mirror device 20 for heating the heat roller 32, light that is not used in the information recording processing is used, so a heating source dedicated to the information erasing processing is used. No need to provide.

As a recording display medium which can be suitably used in such an information recording apparatus, a base material is impregnated with or coated with an ink that develops or erases color by light or heat, or a mixture of an ink and a binder is used as a sheet. It can be used. Specifically, a thermal rewrite type in which a low molecular weight compound such as a fatty acid dispersed in a polymer film is used as a base material and a combination of a dye and a color developer is dispersed in the base material. ,
Various sheets such as thermochromic type and photochromic type can be used.

As a thermal rewrite type sheet,
Those that use a reversible developer consisting of a phenol compound having a long-chain alkyl group or a sulfonylurea compound as a developer, become a color developing body by rapidly cooling after the reversible developer is heated, while gradually cooling. However, according to the information recording apparatus of the present invention, it is possible to perform rapid heating and rapid cooling at a predetermined location, so that stable color development can be obtained.

The thermochromic type sheet includes, for example, biantron, triaryl imidazolyl dimer, perylene tetracarboxylic acid bisimide derivative,
A compound such as thiophene is used as a thermochromic dye,
It is possible to use a mixture of the thermochromic dye and a binder coated as an ink, a mixture of the mixture itself formed into a sheet, and the like. Here, the thermochromic dye means a compound whose absorption spectrum changes by heating.

As the photochromic type sheet, for example, a compound such as azobenzene, spirobenzopyran, spironaphthoxazine, fulgide derivative, diarylethene derivative or phenoxynaphthacene derivative is used as a photochromic dye, and a mixture of the photochromic dye and a binder is used as an ink. It is possible to use a coated product, a sheet of the mixture itself, or the like. Here, the photochromic dye refers to a compound whose absorption spectrum changes by irradiation with light.

In the information recording apparatus of the present invention, it is preferable to selectively use an appropriate light emitting means as a light source depending on the recording / display medium used. Specifically, in the thermal rewrite type sheet and the thermochromic type sheet, a light emitting means that emits infrared rays is used as a light source, and in the photochromic type sheet, a light emitting means that emits ultraviolet rays is used as a light source. It is preferable to use.

Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above examples, and various modifications (1) to (4) below can be added, for example. .

(1) A sheet capable of recording information on both sides thereof may be used as a recording / display medium, and the recording processing section may have a double-sided processing mechanism for simultaneously performing information recording processing on both sides of the sheet body. Further, although information recording processing cannot be performed on both sides of the recording / display medium at the same time, in the state in which the sheet body on which information recording processing has been performed on only one side in the processing stage of the recording processing unit is reversed, the processing stage is again processed. May be provided to perform information recording processing on the other surface.

(2) A color sheet is used as a recording / display medium,
For example, a sensor or the like detects a deviation between the color-developed state of one color sheet on which information is recorded by the information recording process and the standard color-developed state, and based on the result, the light for the color sheet to be subsequently subjected to the information recording process is detected. It may have a light irradiation position control means for controlling the irradiation position. Here, the color sheet has a plurality of colors as latent colors, and these latent colors are arranged in a pattern corresponding to the information to be recorded, and light having a pattern corresponding to the information to be recorded is latent. Information is recorded by exposing latent colors by irradiating a color pattern.

According to the information recording apparatus having such a structure, when the base material of the color sheet is made of an organic material such as polymer or paper, the linear expansion coefficient of these materials is large and the material expands or contracts due to moisture. Therefore, the relationship between the position where the pattern of the latent color corresponding to the information to be recorded on the color sheet is formed and the irradiation position of the light having the pattern corresponding to the information to be recorded is likely to be displaced. Although it is difficult to record information in a desired state, the light irradiation position control means can appropriately adjust the position of light irradiation on the color sheet, so that the desired state of the color sheet can be obtained. You can record information with. In the color sheet, the latent color is generally 3 or 4 colors such as red, green, blue, and black, and the plurality of latent colors are linear or matrix-like, for example, the color of a liquid crystal display. They are arranged in the same pattern as filters.

(3) In the erasing processing section, information erasing processing can be performed on the recording display medium in which information is recorded by various means such as dielectric heating and light heating using an infrared lamp. it can. Specifically, when a light emitting unit that emits infrared rays is used as the light source and a sheet having a characteristic that shows different reactions depending on the irradiation time of the infrared rays is used as the recording / display medium, for example, a reflecting mirror device dedicated to information recording processing is used. In addition, by providing a reflecting mirror device dedicated to the information erasing process, the information recording process and the information erasing process can be performed in parallel.

(4) The reflecting mirror device is not limited to a structure using a single reflection type control element, but has a structure in which a plurality of reflection type control elements are arranged two-dimensionally, It may have a configuration in which the reflective control element is optically wired by an optical fiber, an optical waveguide or the like to form an array-shaped irradiation surface. Further, the reflecting mirror device may be configured by a reflecting mirror group in which a plurality of minute reflecting mirrors are arranged in an array. Even in the information recording device including such a reflecting mirror device, the optical image pattern can be irradiated onto the recording display medium by irradiating the array a plurality of times.

[0051]

According to the information recording apparatus of the present invention, the light emitted from the light source is applied to the recording / display medium through the reflecting mirror device, and the reflecting mirror device has a plurality of minute reflecting mirrors. It is composed of a group of reflecting mirrors arranged in an array or matrix, and the reflection direction of the light emitted from the light source in each of these minute reflecting mirrors is individually controlled, so Based on this, it is possible to pattern light with high precision based on this, and it is possible to irradiate this recording medium with this optical image pattern, so that information recording processing can be performed on the recording display medium with high precision and in a short time. It can be carried out

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of the configuration of an information recording apparatus of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a reflecting mirror device.

FIG. 3 is an explanatory diagram showing another example of the configuration of the information recording apparatus of the present invention.

[Explanation of symbols]

10 Recording processor 11 Processing stage 16 Recording Processing Sheet Supply Unit 17 roller 18 cassettes 20 Reflector device 21 Micro-reflector 22 Projection lens 23 Light introduction part 24 lamps 25 Focusing mirror 26 integrator lens 26A entrance end 26B exit end 27 Plane reflector 28 Condenser lens 30 Erase processing unit 31 Processing stage 32 heat roller 36 Erasing Sheet Supply Unit 37 roller 38 cassettes

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03B 27/46 B41J 3/21 V 5D789 G11B 7/135 G02B 7/18 Z F term (reference) 2C061 AQ03 AR01 AR03 AS02 AS15 GG03 GG17 GG26 2C162 AE12 AE23 AE28 AE46 AE77 FA09 FA49 2H043 CA01 CD04 CE01 2H106 AA12 AA71 AB01 AB45 5D119 AA23 AA24 BA05 BB12 DA01 EB13 FA07 JA57 5D789 AA23 AA24 BA05 BB12 JA01 EB13 FA01 EB13 FA01 EB13 FA01 EB13 FA13

Claims (5)

[Claims] 1. An information recording apparatus for performing an information recording process on a recording display medium on which information is recorded by being irradiated with light, wherein a light source that emits light of at least one of infrared rays, visible light, and ultraviolet rays, A reflecting mirror group in which a plurality of minute reflecting mirrors are arranged in either an array shape or a matrix shape, and a reflection direction of light from the light source incident on each minute reflecting mirror in the reflecting mirror group. And a reflecting mirror device configured to form an optical image pattern by individually controlling each of the minute reflecting mirrors, and the recording display medium is irradiated with light from the reflecting mirror device. An information recording device characterized by the following. 2. A sheet capable of recording information on both sides thereof is used as the recording / display medium, and a double-sided processing mechanism for performing information recording processing on both sides of the sheet which is the recording / display medium is provided. Item 1. The information recording device according to item 1. 3. A rewritable sheet capable of repeating recording of information and erasing of recorded information is used as a record display medium, and a record erasing process is performed on one surface of the rewritable sheet on which information is recorded. The information recording apparatus according to claim 1, further comprising an erasing processing unit. 4. A recording / display medium having a plurality of colors as latent colors, the latent colors being arranged in a pattern corresponding to information to be recorded, and having a pattern corresponding to the information to be recorded. The information recording apparatus according to claim 1, wherein a color sheet on which information is recorded is realized by irradiating a pattern of latent color with light. 5. A light irradiation position control means for controlling a light irradiation position on a color sheet on which information recording processing is to be performed based on a color development state of one color sheet on which information is recorded. The information recording device according to claim 4.