JPH08115539A - Packaging gap type information recording medium - Google Patents

Abstract

PURPOSE: To make it possible to obtain recording with a high sensitivity and high resolution by forming a packaging gap type information recording medium formed in such a manner that recording media are integrated in a disk shape and can be assembled into a camera, etc. CONSTITUTION: The first substrate 1 of a gap type information recording medium consists of glass or plastic, etc., and is formed into a disk shape which has a hole formed at its center. Three image regions of three primary colors R, G, B are included in image forming parts 2 which are radially formed in a plurality around the hole of the substrate 1. The image forming parts 2 are provided thereon with first electrodes 3 and terminals are conducted to the hole of the first substrate. Light reflection layers 4 are formed between liquid crystal recording layers and photoconductive layers in order to monitor the transmittance of the liquid crystal recording layers. A prescribed region is covered by the first electrode layers 3. Third electrode layers 5 are formed on the region for recording information, such as address information and photographing information, exclusive of images and the terminals are guided to the outer peripheral part of the first substrate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a void type information recording medium in which an optical sensor and a liquid crystal recording medium are laminated and an image is recorded by changing the orientation of the liquid crystal recording medium, and in particular, a void type information recording medium formed in a rectangular shape. The present invention relates to a packaging void type information recording medium in which an information recording medium is radially formed on a disk substrate and packaged.

[0002]

2. Description of the Related Art An optical sensor consisting of a photoconductive layer having an electrode provided on the front surface and an information recording medium consisting of a charge holding layer having an electrode provided on the rear surface of the photosensor are arranged on the optical axis. Then, exposure is performed while applying voltage between both conductive layers, electrostatic charge is recorded on the charge holding layer according to the incident optical image, and the electrostatic charge is reproduced by toner development or potential reading. For example, it is described in JP-A-1-290366 and JP-A-1-289975.
Further, the charge retention layer in the above method is a thermoplastic resin layer, electrostatic charges are recorded on the surface of the thermoplastic resin layer and then heated to form a frost image on the surface of the thermoplastic resin layer, thereby recording the electrostatic charge. A method for visualizing the image is described in, for example, Japanese Patent Laid-Open No. 3-192288.

Further, the present applicants have used the polymer-dispersed liquid crystal layer as the information recording layer in the above-mentioned information recording medium, and like the above, it is exposed when a voltage is applied, and the liquid crystal layer is aligned by an electric field formed by an optical sensor. The information recording / reproducing method is described in Japanese Patent Application No. 4-3
394, Japanese Patent Application No. 4-24722, Japanese Patent Application No. 5-266
Filed as No. 646. This information recording / reproducing method can visualize recorded information without using a polarizing plate.

[0004]

By the way, the layer thicknesses of the liquid crystal recording medium and the optical sensor are about 6 μm and 10 μm, respectively, and the layer thickness of the entire void type information recording medium is very thin, less than 20 μm. For example, there has not yet been proposed an apparatus in which such a recording medium is loaded in a camera or the like so that the user can easily take a picture. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a packaging void-type information recording medium in which the void-type information recording medium is formed in a matrix on a disk substrate and packaged.

[0005]

The above object can be achieved by the present invention described below. That is, according to the present invention, a liquid crystal recording medium in which a first electrode layer, a liquid crystal recording layer in which liquid crystal is dispersed and fixed in a resin are laminated is laminated on a first substrate, and a second liquid crystal recording medium is formed on a transparent second substrate.
The air gap type information recording medium is formed by stacking the electrode layer and the photosensor on which the photoconductive layer is formed with the air layer interposed so that the photoconductive layer and the liquid crystal recording layer face each other. A plurality of packaging void type information recording media are formed in a radial pattern on the disk substrate and are rotatably housed in a housing case having a window opened and closed by a shutter. The present invention is also a packaging void type information recording medium in which a light reflection layer for liquid crystal transmittance monitor is formed in a non-image area of the void type information recording medium formed in the rectangular shape. The present invention also provides a current monitoring electrode in the non-image part region of the void-shaped information recording medium formed in the rectangular shape on the opposite side of the second electrode layer of the photosensor via the photoconductive layer. A packaging void type information recording medium having a layer formed thereon. In the invention, one of the first substrate and the transparent second substrate has a larger size than the other,
A packaging air gap type information recording medium in which electrode terminals are formed in a protruding portion of the one of the other by lamination.
Is. Further, the present invention is a packaging void type information recording medium in which an address information recordable region is formed in a non-image part region of the void type information recording medium formed in the rectangular shape,
Is. Further, the present invention is a packaging void type information recording medium in which an address information recordable region is formed on the back side of a base material on which the rectangular void type information recording medium is formed. The present invention also provides a packaging void-type information recording medium in which a region capable of recording photographic information is formed in a non-image portion region of the void-type information recording medium formed in the rectangular shape.

[0006]

The packaging void type information recording medium of the present invention is
A liquid crystal recording medium in which a first electrode layer, a liquid crystal recording layer in which liquid crystal is dispersed and fixed in a resin are laminated on a first substrate, and a transparent second
A space-type information recording medium is formed in a rectangular shape by laminating a second electrode layer and a photosensor having a photoconductive layer on a substrate of (1) with an air layer interposed so that the liquid crystal recording layer and the photoconductive layer face each other. It is rotatably housed in a storage case that has a window part that is opened and closed by a shutter and is formed in a radial pattern on a disk substrate with a hole in the center. Image exposure and reading are performed on the disc substrate through a window opened and closed by a shutter, and a plurality of image exposures and readings are sequentially performed by rotating and stopping the disc substrate. Further, in the packaging void type information recording medium of the present invention, a light reflection layer for liquid crystal transmittance monitor is formed in the non-image area of the rectangular type void type information recording medium, and the light reflection layer is formed. The liquid crystal transmittance is monitored by.
In the packaging void type information recording medium of the present invention, the photoconductive layer is interposed between the second electrode layer of the photosensor and the non-image area of the rectangular void type information recording medium. The current monitoring electrode layer is formed on the opposite side, and the current is monitored by the current monitoring electrode layer. Further, in the packaging void type information recording medium of the present invention, one of the first substrate and the transparent second substrate has a larger size than the other, and the one from the other of the one is laminated by stacking. An electrode terminal is formed on the protruding portion, and the electrode terminal is electrically connected to the power supply. In the packaging void type information recording medium of the present invention, an address information recordable region is formed in a non-image part region of the rectangular void type information recording medium, and the address information recording region is formed in the region. Recording is done. In the packaging void type information recording medium of the present invention, an address information recordable region is formed on the back side of the base material on which the rectangular void type information recording medium is formed, and the region is formed. The address information is recorded at. Further, in the packaging void type information recording medium of the present invention, a non-image portion region of the rectangular void type information recording medium has a photographic information recordable region formed therein, and the photographic information recording region is formed in the region. Recording is done.

[0007]

FIG. 1 is a diagram showing the structure (part 1) of a void type information recording medium of the present invention. In FIG. 1 and FIG. 2 that follows, the arrangement configuration on a plane will be mainly described (see FIG. 3, FIG. 11 and the like described later for the layer configuration). In FIG. 1, 1 is a first substrate, and glass. It is made of a material such as plastic, and has a disk shape with a hole formed in the center. An image forming unit 2 includes three primary colors R, G, and
The three image areas B are included, and a plurality of areas are provided radially around the holes of the substrate 1. Reference numeral 3 denotes a first electrode layer, which is provided on the image forming portion 2 and has terminals led to the holes of the first substrate 1. A light reflection layer 4 is provided between the liquid crystal recording layer and the photoconductive layer in order to monitor the transmittance of the liquid crystal recording layer, and a predetermined area is covered with the first electrode layer 3. Reference numeral 5 denotes a third electrode layer, which is provided on a region for recording information such as address information and photographing information other than an image, and terminals are led to the outer peripheral portion of the first substrate 1.

FIG. 2 is a diagram showing the structure (part 2) of the void type information recording medium of the present invention. In FIG. 2, 6 is a second substrate, which is made of the same material as the first substrate 1 and has the same shape. Reference numeral 7 denotes a second electrode layer, which is provided below a predetermined region of the image forming portion 2 and the light reflection layer 4, and is provided on the second substrate 6
The terminals are led to the outer peripheral portion of. Reference numeral 8 is an electrode for current monitoring, which is mainly used for dark current monitoring of the photoconductive layer. Reference numeral 9 denotes a fourth electrode layer, which is provided below a region for recording information such as address information and photographing information other than an image, and terminals are led to the outer peripheral portion of the second substrate 6. The address information is position information on the substrate of the void-type information recording medium where an image is captured by the image forming unit 2 or where the image is captured. Address information can be written before shooting or each time shooting is performed, and the unrecorded area can be searched and the number of remaining imageable areas can be known from the information. The shooting information is information such as the shooting date and time, the place, the comment, the voice information, and the like, and includes various information associated with the image that identifies the shot image.

FIG. 3 is a view showing a cross section of the void type information recording medium of the present invention in a state in which the first substrate 1 and the second substrate 6 are combined. 3A shows a cross section taken along AA ′ in FIG. 1, FIG. 3B shows a cross section taken along BB ′ in FIG. 2, and FIG. 3C shows a cross section taken along CC ′ in FIG.
3D shows a cross section taken along the line DD ′ of FIG.
(E) shows a cross section at EE 'in FIG. FIG.
As shown in (A), the third electrode layer 5 is the third electrode terminal 1
With 0, it goes around the peripheral portion of the first substrate 1 and is electrically connected to the back side of the first substrate 1. The light reflection layer 4 is the liquid crystal recording layer 2
2 and the photoconductive layer 21. Further, 11 is a void forming layer, which is provided in the gap sandwiched between the first substrate 1 and the second substrate 6 at the outer peripheral portion and the inner peripheral portion of both substrates, and keeps the void 12 at a predetermined distance. Form. The void forming layer 11 not only functions as a spacer for forming the void 12, but also
The first substrate 1 and the second substrate 6 can be bonded and integrated to each other, and a foreign substance or the like can be prevented from entering the void 12.

As shown in FIG. 3B, the fourth electrode layer 9 wraps around the periphery of the substrate by the fourth electrode terminal 13 and is electrically connected to the back side of the substrate. As shown in FIG. 3C, the third electrode layer 5 is formed between the first substrate 1 and the liquid crystal recording layer 22, and the fourth electrode layer 9 is formed between the second substrate 6 and the photoconductive layer 21. Formed in between. As shown in FIG. 3D, the first electrode layer 3
Is circulated through the hole of the first substrate 1 by the first electrode terminal 14 and is electrically connected to the back side of the first substrate 1. Further, the second electrode layer 7 goes around the peripheral portion of the second substrate 6 by the second electrode terminal 15 and is electrically connected to the back side of the second substrate 6. FIG.
As shown in (E), the current monitor electrode layer 8 is the photoconductive layer 2
The current monitor electrode layer 8 formed on the first substrate 1 is wrapped around the periphery of the substrate 6 by the current monitor electrode terminal 16 to form the second monitor electrode layer 8.
Conductive to the back side of the substrate 6.

FIG. 4 shows a first example of the void type information recording medium of the present invention.
It is a figure which shows an example of the address bar provided in the board | substrate of this. FIG. 4A is an overall view, and in FIG.
Reference numeral 7 is an address bar having a positioning mark and address information when the disk-shaped void type information recording medium is rotated around a center hole and stopped. FIG. 4B is a diagram showing the configuration of the address bar 17. As shown in FIG. 4B, the address bar 17 has eight element parts (1
(Corresponding to the information of Byte).
In the example shown in (A), is the address information (4bi
(4) is assigned to the positioning mark. The predetermined information is expressed by "0" and "1", and is given as a pattern to the element parts ~. For example, “0” and “1” can be distinguished by the difference in light reflectance, color, interference and the like. In addition to the optical pattern, a magnetic recording layer may be provided to form a magnetic recording pattern. The number of the element parts of the address bar is not limited to the above eight, and a necessary number can be provided according to the number of sets of the image forming units.

FIG. 5 is a diagram showing a modified embodiment of the present invention. 5A is a plan view, and FIGS. 5B and 5C are cross-sectional views taken along line AA ′ in FIG. 5A. In this embodiment, as shown in FIG. 5A, one of a plurality of image forming portions is used as a current monitor region in which an upper electrode is not provided and the current monitor electrode layer 8 is used. As shown in FIG. 5 (B), the current monitor electrode layer 8 is extended and moved below the central hole to take out the current monitor electrode terminal 16. In this embodiment, the upper electrode is not provided in a part of the region, this part is used as the current monitor electrode layer 8, and the current monitor electrode terminal 16 is taken out above or below the central hole side, or By providing it on the surface of the second substrate 6 in the vicinity of the hole, it is possible to configure an electrode terminal while preventing the occurrence of conduction with the contact 10 of the lower electrode. On the other hand, in the example shown in FIG. 5 (C), the holes for the first substrate 1 are made larger and the outer shape is made smaller than that of the second substrate 6, so that the current monitor terminal 16 is formed in the hole of the second substrate 6. The second electrode terminal 15 is provided on the surface in the vicinity thereof and on the surface in the vicinity of the outer periphery of the second substrate 6.

FIG. 6 is a diagram showing an embodiment in which the disk-shaped void type information recording medium is packaged in a rectangular housing case. In FIG. 6, the void type information recording medium is rotatably accommodated. The storage case 18 is provided with a shutter 19 movable in the left-right direction in the drawing, and the front surface opening 2 provided in a part of the storage case 18 is provided.
0, the back opening 23 can be opened and closed. In this example, the recording medium is stored in the storage case 18 with the front side shown in FIG. 6A as the optical sensor side and the back side shown in FIG. 6B as the liquid crystal layer side. Storage case 18
When the camera is loaded in the camera, the shutter 19 moves in the direction of the arrow in the figure, and the image forming unit, the address information recording unit, the photographing information recording unit, and the like are opened at both the front opening 20 and the rear opening 23. Thus, it is possible to record and reproduce information from the outside. In particular, the back opening is largely opened, and the electrode terminals of the image recording section, the electrode terminals of the address information recording section, the electrode terminals of the photographing information recording section, the electrode terminals for the current monitor, and the electrical connection between the external device and It is configured so that contacts can be obtained. The rear surface of the shutter 19 is also configured to open and close the drive hole 24 for rotationally driving and stopping the disk-shaped void type information recording medium.
For reproducing information, the image forming portion is exposed by moving the shutter 19 and can be read by an image sensor such as a CCD line sensor from the back surface which is the liquid crystal layer side.

FIG. 7 is a view showing the internal structure of a disk-shaped void type information recording medium or the like which is packaged and built in a storage case. 7A shows the front surface side, and FIG. 7B shows the cross section. In FIG. 7A, there are a plurality of image forming portions 24, which are radially formed on a disk-shaped substrate. A transmittance change monitor unit 25 is provided for each of the image forming units 24, and is configured to enable control of photographing conditions by measuring transmittance. In addition, FIG. 7 (B)
As shown in FIG. 3, clean papers 26 and 27 are provided on the inner surface side of the storage case 18 so as to face the recording medium and both sides thereof are provided to prevent the recording medium from being contaminated by dust or the like. Furthermore, since the information recording layer is sensitive to dust and moisture, it is preferable to use another dustproof and moistureproof treatment together. In the information recording / reproducing apparatus for such a packaged recording medium, in both the transmissive liquid crystal recording medium and the reflective liquid crystal recording medium, image writing light is performed from the surface which is the optical sensor side,
The incident reading light is reflected from the front or back surface in the case of the transmissive type and from the liquid crystal side in the case of the reflective type when the reflective layer is provided in the intermediate layer, and the upper electrode (electrode on the liquid crystal layer) is reflected. In the case of a layer, both the writing light and the reading light are incident from the surface (optical sensor) side.

Next, a method of manufacturing the disk medium will be described. FIG. 8 is a diagram showing a flow chart and a schematic diagram of a process in which a disk-shaped optical sensor portion is processed and shaped in the manufacturing process. In FIG. 8 (A), an ITO (indium oxide / tin) coating is formed on a circular substrate (second substrate) such as glass or plastic, which is patterned to form a lower electrode layer (second electrode layer). Form. This patterning is performed by etching using a resist, a dry mask or the like. At this time, the lower electrode layers can be made of the same material, but other metals such as Au and Al can be partially used (S1). In this way, the lower electrode is uniformly patterned and formed into a circular disk shape, and then the photoconductive layer is formed by a coating process such as a spinner, a blade, or a dip spray. The formation of this photoconductive layer is not limited to the patterning of the lower electrode but is uniformly performed on the disk (S
2).

Then, as shown in FIG. 8B, a trimming process is performed to remove the photoconductive layer on the peripheral portion of the disk (S3). Next, as shown in FIG. 8C, a current monitor electrode for monitoring the dark current of the photoconductive layer so as to extend to the edge of the disc disk so as to partially overlap with the lower electrode on which the photoconductive layer is formed. Form the layers. As a stacking method, a dry mask method or the like is used (S4). Furthermore,
Electrode terminals are formed on the second electrode layer and the current monitoring electrode layer. As a method of forming the lower electrode terminal, there are ion plating, sputtering, vapor deposition, CVD, etc. as a method of forming a thin film of a conductive material, and silver paste printing, indium as a method of forming a thick film of a conductive material. It can be performed by soldering, spot welding, etc. (S
5). Finally, as shown in FIG. 8 (D), a center hole is formed on the disk to complete the optical sensor portion (S6).

FIG. 9 is a flow chart and a schematic view showing a process in which a disk-shaped information recording medium portion is processed and shaped by the manufacturing process. In FIG. 9A, IT is formed on a circular substrate (first substrate) such as glass or plastic.
An O (indium oxide / tin) film is formed and patterned to form an upper electrode layer (first electrode layer) and other electrode layers (address information recording electrode layer, photographing information recording electrode layer). . This patterning is performed by etching using a resist, a dry mask or the like. On this occasion,
Although it is possible to use the same material for all the upper electrode layers,
Other metals such as Au and Al can be partially used (S1
1). After the lower electrode is uniformly patterned and formed into a circular disk shape in this manner, a liquid crystal recording layer is formed by a coating process such as a spinner, a blade, or a dip spray. The formation of the liquid crystal recording layer is not limited to the patterning of the upper electrode but is uniformly performed on the disk (S12).

Then, as shown in FIG. 9B, a trimming process for removing the liquid crystal recording layer at the peripheral portion on the disk is performed (S13). Next, as shown in FIG. 8C, a light-reflecting layer for monitoring the transmittance for monitoring the transmittance of the liquid crystal recording layer is formed so as to partially overlap with the upper electrode on which the photoconductive layer is formed. The light reflecting layer is formed of Au, Al ... By vapor deposition sputter ion plating or the like (S1).
4). Further, electrode terminals are formed on the first electrode layer and other electrode layers (address information recording electrode layer, photographing information recording electrode layer). As a method of forming the lower electrode terminal, there are ion plating, sputtering, vapor deposition, CVD, etc. as a method of forming a thin film of a conductive material, and silver paste printing, indium as a method of forming a thick film of a conductive material. It can be performed by soldering, spot welding or the like (S15). Finally, as shown in FIG. 9D, a center hole is formed on the disc to complete the information recording medium portion (S16).

FIG. 10 is a flow chart and a schematic view showing a process of assembling the optical sensor part and the information recording medium part manufactured in the manufacturing process to obtain a disk medium by the manufacturing process. First, as shown in FIG. 10A, a void forming layer is formed on one or both of the optical sensor portion and the information recording medium portion. The void forming layer is provided with a spacer material formed by molding a film made of a plastic material such as polyethylene terephthalate or polyimide having good thickness accuracy and electrical insulation between the optical sensor portion and the information recording medium portion, or
Alternatively, it can be formed by curing and molding a UV curable resin, an aqueous resin, a fluororesin or the like between the optical sensor portion and the information recording medium portion (S21).

Next, as shown in FIG. 10B, the optical sensor portion and the information recording medium portion are bonded and sealed with an adhesive to obtain a disk medium (S22). Alternatively, FIG. 10 (C)
As shown in, the optical sensor portion and the information recording medium portion are mechanically coupled to each other by using the clamping means to obtain a disc medium (S23). In this way, a circular disk is stored in the storage case as shown in FIG. 6 to form a recording medium incorporated in a camera or the like. That is, in a photographing device such as a camera, the recording medium is rotatably supported by the rotation support body,
Depending on the contact terminals, the upper electrode terminal, the lower electrode terminal, the current monitor electrode terminal, the photographing information recording electrode terminal, and the address information recording electrode terminal are the surface portion near the hole of the first substrate and the peripheral portion of the second substrate. You can take out more.

[Optical Sensor and Information Recording Medium] Next, the optical sensor and the information recording medium in the present invention will be described.
The optical sensor 28 and the information recording medium 29 are laminated in parallel with each other with a gap provided, and a voltage is applied in a direction substantially perpendicular to their surfaces. FIG. 11 is a diagram showing a case where the planar optical sensor 28 and the information recording medium 29 are laminated in parallel with each other in a space in the package type information recording medium of the present invention.

The photoconductive layer of the photosensor of the present invention may be composed of a single layer or a laminated body composed of a plurality of layers. Here, a laminated photosensor will be described. In FIG. 11, 1 is a substrate, 6 is a second electrode layer, and 21 is a photoconductive layer. The photoconductive layer 21 is composed of 30 charge generation layers and 31 charge transport layers.
That is, the optical sensor 28 is composed of the substrate 1, the second electrode layer 6, the charge generation layer 30, and the charge transport layer 31. Also,
Reference numeral 3 is a first electrode layer, and 22 is a liquid crystal recording layer, which constitutes an information recording medium.

The operation of the configuration shown in FIG. 11 will be described. When the shutter is opened by the control circuit, the light passing through the lens from the subject reaches the three-color separation optical system, and the three colors (Red,
Green, Blue) (not shown). The image of the subject is formed on the surface of the photoconductive layer 21 through the transparent substrate 1 and the second electrode layer 6. The photoconductive layer 21 has photoconductivity, and the conductivity is exhibited according to the light amount of each part of the formed image. That is, the light image is converted into a conductive image.
A voltage is applied between the first electrode layer 3 and the second electrode layer 6 by the voltage applying means. Power supply 32
, One of the electrode terminals is grounded, and this ground terminal is grounded through the first electrode layer 3 of the information recording medium 29.
It is connected to the. The other electrode terminal is connected to the second electrode layer 6 of the optical sensor 28 via the switch 33 whose opening and closing is controlled by the control circuit. A resistor 36 is connected between the first electrode layer 3 and the second electrode layer 6, and when the switch 33 is open, the accumulated charge between the electrodes passes through the resistor 36 and is discharged. Therefore, there is no potential difference between both electrodes.

When the switch 33 is closed and a predetermined voltage is applied in the state where the light image is converted into the conductive image, a current flows according to the conductivity of the photoconductive layer 21. This is called a photoinduced current, and one of the features is that the photoconductive layer in the present invention has a remarkable effect of amplifying the photoinduced current. The photoinduced current causes the liquid crystal recording layer to be oriented and changes from a light scatterer to a light transmitter. When the control circuit stops applying the voltage after applying the predetermined voltage for a predetermined time, the alignment function is maintained by the memory function of the liquid crystal recording layer 22. That is, the formed image is recorded as a difference in the light scattering state of the liquid crystal recording layer 22.

[Structure and Material of Optical Sensor] Next, the structure and material of the optical sensor of the present invention will be described. The charge generation layer 30 of the optical sensor includes a charge generation material and a binder. As the charge-generating substance, a pyrylium dye,
Azurenium dye, squarylium salt dye, phthalocyanine pigment, perylene pigment, polycyclic quinone pigment,
Indigo pigments, pyrrole pigments, azo pigments, and other dyes and pigments can be used alone or in combination. As the binder, for example, polycarbonate resin, vinyl formal resin, vinyl acetal resin, vinyl butyral resin, polyester resin,
Acrylic resins, methacrylic resins, vinyl chloride resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins and the like can be mentioned, and binder resins can be used alone or in combination of two or more.

The mixing ratio of the charge generating agent and the binder is such that the binder is 0.1 to 1 part by weight of the charge generating agent.
It is desirable to use 10 parts by weight, preferably 0.2 to 1 part by weight. The charge generation layer has a thickness after drying of 0.01 to 1 μm, preferably 0.1 to 0.5 μm.
m is preferable, and such a film thickness shows good sensitivity and image quality. In addition, the above-described charge-generating substance that can be vapor-deposited can be formed into a film alone without using a binder.

The charge transport layer 31 is composed of a charge transport material and a binder. The charge-transporting substance is a substance having a good property of transporting charges generated in the charge-generating layer, and examples thereof include oxazole-based, thiazole-based, triphenylmethane-based, styryl-based, stilbene-based, hydrazone-based, carbazole-based, enamine-based, There are aromatic amine-based, triphenylamine-based, butadiene-based, polycyclic aromatic compound-based, biphenyl-based, etc., and it is necessary to use a substance having good hole transport properties.

As the binder, the same binders as those used in the charge generation layer described above, and styrene resin, styrene-butadiene copolymer resin, polyarylate resin and phenoxy resin can be used, and preferably styrene resin and styrene-butadiene copolymer. Polymer resins and polycarbonate resins. The binder is 0.1 to 10 parts by weight, preferably 0.
It is desirable to use it in a ratio of 1 to 1 part by weight. The thickness of the charge transport layer after drying is from 1 to 50 μm, preferably from 3 to 26 μm. With such a thickness, good sensitivity and image quality can be obtained.

The first electrode layer 3 needs to be transparent if the information recording medium is opaque, but may be transparent or opaque if the information recording medium is transparent.
A material that stably gives a specific resistance of 10 ⁶ Ω · cm or less, for example, a metal thin film conductive film of gold, platinum, zinc, titanium, copper, iron, tin, tin oxide, indium oxide, zinc oxide, titanium oxide, oxide A metal oxide conductive film such as tungsten or vanadium oxide, an organic conductive film such as a quaternary ammonium salt, or the like can be used alone or as a composite material of two or more kinds. Of these, oxide conductors are preferable, and indium tin oxide (ITO) is particularly preferable.

The first electrode layer 3 is formed by vapor deposition, sputtering,
It is formed by a method such as CVD, coating, plating, dipping, and electric field polymerization. The film thickness needs to be changed depending on the electrical characteristics of the material forming the electrodes and the applied voltage at the time of recording information.
0 to 300 nm, the entire surface between the information recording layer,
Alternatively, it is formed according to an arbitrary pattern. Also,
It is also possible to stack two or more kinds of materials and use them.

The substrate 1 is required to have transparency if the information recording medium described later is opaque. If the information recording medium is transparent, it may be transparent or opaque, and may be a card, a film, It has a shape of a tape, a sheet, a disk, etc. and strongly supports the optical sensor. For example, a flexible plastic film, a plastic sheet such as glass, polyethylene, polypropylene, polyethylene terephthalate, polymethyl methacrylate, polymethyl acrylate, polyester, polycarbonate, or a rigid body such as a card is used. In addition, on the other surface of the substrate where the electrodes are provided,
If the electrode is transparent, if necessary, a layer having an antireflection effect is laminated, or a transparent substrate is adjusted to a film thickness capable of exhibiting an antireflection effect, or by combining both, antireflection property is imparted. Good to do.

The photoconductive layer contains an electron-accepting substance, a sensitizing dye,
Antioxidants, ultraviolet absorbers, light stabilizers and the like may be added. The electron-accepting substance and the sensitizing dye have the functions of adjusting the base current, stabilizing the base current, and sensitizing. Each is added in an amount of 0.001 to 10 parts by weight, preferably 0.01 to 1 part by weight, relative to 1 part by weight of the photoconductive substance. If less than 0.001 parts by weight, no action is shown, and 1
If the amount is more than 0 parts by weight, the image quality is adversely affected. This is the end of the description of the configuration and materials of the optical sensor of the present invention.

[Fabrication of Stacked Photosensor] Next, a method of fabricating a stacked photosensor will be described. An ITO film having a sheet resistance of 80 Ω / □ and a film thickness of 100 nm was formed by sputtering on a sufficiently washed glass substrate having a thickness of 1.1 mm to obtain an electrode. Scriber cleaning machine for electrodes (trade name: plate cleaner model 602 Ultratech)
At this point, the cleaning treatment was performed twice: pure water spraying 2 seconds, scriber cleaning 20 seconds, pure water rinsing 15 seconds, water removal by high speed rotation 25 seconds, and infrared drying 55 seconds. 3 parts by weight of a bisazo pigment having a structure shown in Table 1 below as a charge generating substance on the electrode, a vinyl chloride-vinyl acetate mixed resin (Denka vinyl # 1000D manufactured by Denki Kagaku Kogyo and 18,325.89J vinyl acetate resin manufactured by Aldrich). With 7
1 part by weight of a mixture of 5:25), 98 parts by weight of 1,4-dioxane and 98 parts by weight of cyclohexanone, and sufficiently kneaded by a mixer to prepare a coating solution, which is spinner at 1400 rpm for 0.4 seconds. Coated with.

[0034]

Embedded image After that, a film is formed on the surface of the coating film, and leveling drying is performed by leaving it in a dust-free state until the surface does not adhere, and then dried at 100 ° C. for 1 hour to form a charge generation layer having a film thickness of 300 nm. Were laminated.

On this charge generating layer, a butadiene derivative having a structure shown in Table 2 below (T manufactured by Annan) was used as a charge transporting substance.
─405) 50 parts by weight and 10 parts by weight of styrene-butadiene copolymer resin (Clearene 730L manufactured by Denki Kagaku Kogyo Co., Ltd.) are uniformly dissolved in 68 parts by weight of chlorobenzene and 136 parts by weight of 1,1,2-trichloroethane to obtain a coating solution. And

[0036]

Embedded image Using the coating solution, a spinner was used at 350 rpm,
After coating for 4 seconds, the film is formed on the surface of the coating film and left to stand without wind for leveling and drying until the surface of the coating film does not adhere. A photosensor of the present invention having a 20 μm-thick photoconductive layer including a charge generation layer and a charge transport layer was manufactured by laminating a transport layer, and was aged for 3 days in a dark place at room temperature and a relative humidity of 60% or less. .

[Structure and Material of Information Recording Medium] Next, the structure and material of the information recording medium 2 will be described. First, as the information recording medium in the present invention, the information recording layer may be a liquid crystal recording layer. The liquid crystal recording layer has a structure in which resin particles are dispersed in the liquid crystal phase, and as the liquid crystal material, smectic liquid crystal, nematic liquid crystal, cholesteric liquid crystal, or a mixture thereof can be used. As the liquid crystal, it is preferable to use a smectic liquid crystal from the viewpoint of so-called memory property that retains its orientation and permanently retains information.

As the smectic liquid crystal, a liquid crystal substance exhibiting a smectic A phase, such as a cyanobiphenyl type, a cyanoterphenyl type, a phenyl ester type, in which the terminal carbon group of the substance exhibiting liquid crystallinity is a fluorine type, or a ferroelectric substance, is used. Examples thereof include a liquid crystal substance exhibiting a smectic C phase used as a liquid crystal, a liquid crystal substance exhibiting smectic H, G, E, F and the like.

The material for forming the resin particles is, for example, an ultraviolet curable resin which is compatible with the liquid crystal material in the monomer or oligomer state, or a solvent which is common to the liquid crystal material in the monomer or oligomer state. Those having compatibility with can be preferably used. Examples of such an ultraviolet curable resin include acrylic acid ester and methacrylic acid ester. In addition, a solvent-soluble thermosetting resin having compatibility with a liquid crystal material and a common solvent, such as an acrylic resin, a methacrylic resin, a polyester resin, a polystyrene resin, and a copolymer containing these as a main component, an epoxy resin, You may use silicone resin etc.

The liquid crystal material and the resin may be used in such a manner that the liquid crystal content is 10 to 90% by weight, preferably 40 to 80% by weight,
If it is less than 10 parts by weight, the light transmittance is low even if the liquid crystal phase is aligned by information recording, and if it exceeds 90 parts by weight, phenomena such as seeping out of the liquid crystal occur and image unevenness is not preferable. Since the film thickness of the information recording layer affects the resolution,
Film thickness after drying 0.1 μm to 10 μm, preferably 3 μm
The thickness may be 8 μm, and the operating voltage can be lowered while maintaining high resolution. If the film thickness is too thin, the contrast of the information recording portion will be low, and if it is too thick, the operating voltage will be high, which is not preferable. This is the end of the description of the configuration and materials of the information recording medium of the present invention.

[Production of Information Recording Medium] Next, a method for producing the information recording medium will be described. An ITO film having a film thickness of 100 nm was formed as a conductive layer on a glass substrate having a thickness of 1.1 mm by sputtering to obtain an electrode, and then the surface was washed. A polyfunctional monomer (dipentaerythritol hexaacrylate, manufactured by Toagosei Kagaku, M
-400) 40 parts by weight, a photo-curing initiator (2-hydroxy-2-methyl-1-phenylpropan-1-one, manufactured by Ciba-Geigy, Darocure 1173) 2 parts by weight, liquid crystal 50 parts by weight (of which smectic liquid crystal ( Made by Merck,
90% S-6, nematic liquid crystal (M3, E3
1 LV) 10%), a surfactant (Sumitomo 3M, Florard FC-430) 3 parts by weight A coating solution obtained by uniformly dissolving in 96 parts by weight of xylene was applied with a blade coater having a gap of 50 μm. After coating, the coating film was dried at 47 ° C. for 3 minutes, and then dried under reduced pressure at 47 ° C. for 2 minutes, and the coating film was immediately cured by irradiation with 0.3 J / cm ² no infrared rays to form an information recording layer having a thickness of 6 μm. An information recording medium having the above was obtained. After extracting the liquid crystal from the information recording layer surface with hot methanol and drying it, the internal structure was observed with a scanning electron microscope (S-800 manufactured by Hitachi, Ltd.) at 1000 times. In the liquid crystal phase which is covered with a hardening resin and forms a continuous layer inside the layer,
It had a structure filled with a resin particle phase having a particle diameter of 0.1 μm.

[Temperature Characteristics of Information Recording Medium] Next, the temperature characteristics of the information recording medium used in the present invention will be described.
FIG. 12 is a diagram showing an example of temperature characteristics of the information recording medium used in the present invention. In FIG. 12, the horizontal axis represents the voltage (Volt) applied to the liquid crystal recording layer 22, and the vertical axis represents the modulation rate (%). The modulation rate is a scale in which the output of the detector in the maximum light transmission state is 100% and the output of the detector in the maximum light scattering state is 0% when optically reading the recorded information from the information recording medium. Is given to the output of the detector. As shown in the figure, the reason why the modulation rate changes sharply with respect to the change in voltage is
It shows that the sensitivity is extremely high. On the other hand, the change in the characteristic of the modulation rate with respect to temperature indicates that the temperature and voltage are controlled when used in an environment where the temperature changes. It also shows that it is possible to erase the recorded information by utilizing such characteristics. In the present invention, in consideration of such characteristics of the information recording medium, specific settings such as a temperature condition and a voltage condition during use are set.

[Photo-induced Current Amplifying Action of Photo Sensor] Next, the photo-induced current amplifying action of the photo sensor 28, which is one of the features of the present invention, will be described. When the light pattern is applied to the light sensor, the light sensor exhibits conductivity, and the voltage applied to the information recording medium or the amount of charge applied is amplified over time. Further, if the voltage is continuously applied even after the light irradiation is finished, the photosensor maintains the expressed conductivity in a relaxation-attenuating manner, and the voltage applied to the information recording medium or the applied charge amount continues to elapse. Is amplified. Then, these voltages and charge amounts form a voltage pattern and charge amount pattern having the same shape as the light pattern applied to the optical sensor, and are further medium-converted into a visible pattern or the like as necessary and recorded on the information recording medium. It

The time-dependent amplifying action of the applied charge amount in the photosensor, that is, the "photoinduced current amplifying action" will be described in more detail. An optical sensor and a measuring device are configured as follows, and the photo-induced current amplification action of the optical sensor is measured. An ITO electrode is provided on transparent glass, a photoconductive layer is formed on the electrode, and 0.16 cm is further formed on the photoconductive layer.
Form ² gold electrodes. Then, between the two electrodes, ITO
While applying a constant DC voltage with the electrode as a positive electrode,
0.5 seconds after the start of voltage application, light is irradiated from the substrate side for 0.033 seconds, and the behavior of the current value in the photosensor during the measurement time is measured from the start of light irradiation (t = 0). The irradiation light is a xenon lamp (L2274 manufactured by Hamamatsu Photonics).
To the light source by a green filter (manufactured by Nippon Vacuum Optical Co., Ltd.) having the characteristics shown in FIG. To do.

Considering the power spectrum of the light source, the light transmittance of the transparent substrate, the ITO film, and the spectral characteristics of the filter when light is irradiated at this light intensity, the photoconductive layer has 4.2 × 10 4.
¹¹ photons / cm ² seconds are incident. Then, if all the incident photons are converted into photocarriers, theoretically, the photocurrent is 1.35 × 10 ⁻⁶ A / unit area.
A current of cm ² is generated.

Here, in the case of the photo-induced current actually generated by the optical sensor with respect to the theoretical photo-current when measured by the above-mentioned measuring device (photo-induced current value actually generated by the photo-sensor / theoretical The photocurrent value) is defined as the quantum efficiency of the photosensor. The photo-induced current is the current value of the light irradiation part minus the base current value which is the current that flows in the part when light is not irradiated. It refers to a current that flows due to it and is different from so-called photocurrent. The photoinduced current amplification action in the photosensor of the present invention is defined as such behavior of photoinduced current.

An optical sensor having a photo-induced current amplifying action and an optical sensor having no photo-induced current amplifying action (hereinafter referred to as a comparative sensor) according to the present invention will be described with reference to the measurement results of the measuring device. First, the measurement result of the comparative sensor is shown in FIG. In FIG. 14, line (m) is a reference line indicating the theoretical value (1.35 × 10 ⁶ A / cm ² ), and light irradiation is performed for 0.033 seconds, and voltage application is continued after light irradiation. Indicates. The line (n) is the actual measurement line of the photosensor that does not have the photoinduced current amplification effect, and the change in quantum efficiency during light irradiation is shown in FIG.

On the other hand, in the photosensor of the present invention, as an example, as shown in FIG. 16, the photoinduced current increases at the time of light irradiation, and as shown in FIG. It can be seen that the quantum efficiency exceeds 1 in 0.01 seconds and continues to increase thereafter. Further, in the comparative sensor, the photocurrent abruptly attenuates at the same time as the light irradiation is completed, so that even if the voltage is continuously applied after the light irradiation, the effective current as the light information cannot be obtained. On the other hand, in the photosensor of the present invention, the photoinduced current continuously flows by continuing the voltage application even after the light irradiation, and the photoinduced current can be continuously taken out, and the optical information can be continuously obtained. it can. This completes the description of the organic current amplification function of the photosensor of the present invention.

[Semiconductivity of Optical Sensor] In the optical sensor of the present invention, the photoconductive layer is a semiconductive material in the dark.
From the flowing current density, the specific resistance in the dark is 10 ⁹ to 10 ¹³ Ω.
It is preferably cm. Particularly, the specific resistance is 10 ¹⁰ to 1
With 0 ¹¹ Ω · cm, the amplification effect is remarkable. In the case of an optical sensor having a specific resistance larger than 10 ¹³ Ω · cm, 10 ⁵ to 1
In the electric field strength range of 0 ⁶ V / cm, it does not exhibit the amplifying action as the optical sensor of the present invention. Also, the specific resistance is 10 ⁹ Ω · c.
If the photosensor is less than m, a large amount of current flows, and noise is likely to occur due to the current, which is not preferable.

On the other hand, for an organic photoconductor used for general electrophotography, a material having a dark specific resistance of 10 ¹⁴ to 10 ¹⁶ Ω · cm is used as an insulating material in the dark. Has been. Therefore, when the photosensor of the present invention is used in electrophotography, the purpose of electrophotography cannot be achieved.
Further, the organic photoreceptor used in general electrophotography cannot attain the object of the present invention when used in the photosensor of the present invention.

When the information recording layer in the information recording medium is a liquid crystal recording layer, it is necessary to set the sensitivity of the optical sensor in the operating voltage range of the liquid crystal. That is, the contrast voltage, which is the voltage between the voltage (bright potential) applied to the information recording medium in the maximum exposure portion and the voltage (dark potential) applied to the information recording medium in the minimum exposure portion,
It is necessary that the liquid crystal recording layer in the information recording medium be included in the operating voltage region and have a size capable of obtaining a predetermined operating amplitude. Therefore, for example, the dark potential applied to the liquid crystal layer of the minimum exposure portion of the photosensor needs to be set to about the operation start potential of the liquid crystal. Therefore, the resistivity of the information recording medium is 10 ¹⁰ to 10 ¹³ Ω · cm at room temperature, which is 1
With an electric field of 0 ⁵ to 10 ⁶ V / cm applied, 10
The conductivity is required to the extent that a base current of ⁻⁴ to 10 ⁻⁷ A / cm ² is generated, and the range of 10 ⁻⁵ to 10 ⁻⁶ A / cm ² is preferable.

In the photosensor having a base current of less than 10 ^-7 A / cm ² , the liquid crystal recording layer layer is not aligned even in the maximum exposure state, and in the photosensor having a base current of 10 ^-4 A / cm ² or more, the liquid crystal layer is not aligned. Even in the minimum unexposed state, a large current flows at the same time as the voltage is applied, and the liquid crystal recording layer is oriented. Therefore, even if exposed, a difference in transmittance depending on the exposure amount cannot be obtained. Further, since the operating voltage and range may vary depending on the type of liquid crystal, it is necessary to consider the voltage distribution in the information recording medium when setting the applied voltage and the voltage application time. This is the end of the description of the semiconductivity of the optical sensor of the present invention.

[0053]

As described above, according to the present invention,
It is possible to provide a packaging air gap type information recording medium in which recording media are integrated in a disk shape so that they can be incorporated in a camera or the like, and high sensitivity is achieved by using an optical sensor having a photo-induced current amplification effect, High resolution recording can be performed by combining the optical sensor and an information recording medium having a liquid crystal recording layer as a constituent element. The packaging void type information recording medium of the present invention comprises a liquid crystal recording medium in which a first electrode layer, a liquid crystal recording layer in which liquid crystal is dispersed and fixed in a resin are laminated on a first substrate, and a transparent second substrate. A void-type information recording medium in which a second electrode layer and a photosensor having a photoconductive layer formed thereon are laminated with an air layer interposed so that the liquid crystal recording layer and the photoconductive layer face each other is formed in a rectangular shape at the center. It is rotatably housed in a storage case that has a plurality of holes radially formed on a disk substrate with holes and that is opened and closed by a shutter. Image exposure and reading can be performed on the disc substrate through the window, and a plurality of image exposures and readings can be performed one after another by rotating and stopping the disc substrate. Further, in the packaging void type information recording medium of the present invention, a light reflection layer for liquid crystal transmittance monitor is formed in the non-image area of the rectangular type void type information recording medium, and the light reflection layer is formed. Can monitor the liquid crystal transmittance. In the packaging void type information recording medium of the present invention, the photoconductive layer is interposed between the second electrode layer of the photosensor and the non-image area of the rectangular void type information recording medium. The current monitoring electrode layer is formed on the opposite side, and the current can be monitored by the current monitoring electrode layer. Further, in the packaging void type information recording medium of the present invention, one of the first substrate and the transparent second substrate has a larger size than the other, and the one from the other of the one is laminated by stacking. An electrode terminal is formed on the protruding portion, and the electrode terminal can be electrically connected to the power supply. In the packaging void type information recording medium of the present invention, an address information recordable region is formed in a non-image part region of the rectangular void type information recording medium, and the address information recording region is formed in the region. Records can be made. In the packaging void type information recording medium of the present invention, an address information recordable region is formed on the back side of the base material on which the rectangular void type information recording medium is formed, and the region is formed. Address information can be recorded in the. Further, in the packaging void type information recording medium of the present invention, a non-image portion region of the rectangular void type information recording medium has a photographic information recordable region formed therein, and the photographic information recording region is formed in the region. Records can be made.

[Brief description of drawings]

FIG. 1 is a diagram showing a portion (1) of the structure of a void type information recording medium of the present invention.

FIG. 2 is a diagram showing a part (2) of the constitution of the void type information recording medium of the present invention.

FIG. 3 is a diagram showing a cross section of a void type information recording medium of the present invention.

FIG. 4 is a diagram showing a side surface of a substrate and an address bar of a void type information recording medium of the present invention.

FIG. 5 is a diagram showing another embodiment of the void type information recording medium of the present invention.

FIG. 6 is a diagram showing an embodiment in which a disk-shaped void type information recording medium is packaged in a rectangular storage case.

FIG. 7 is a diagram showing an internal configuration of a disc-shaped void type information recording medium or the like which is packaged and built in a storage case.

FIG. 8 is a diagram showing a flow chart and a schematic view of a process in which a disk-shaped optical sensor portion is processed and shaped by a manufacturing process.

FIG. 9 is a diagram showing a flow chart and a schematic view of a process in which a disc-shaped information recording medium portion is processed and shaped by a manufacturing process.

FIG. 10 is a flow chart and a schematic view showing a process of assembling the optical sensor part and the information recording medium part manufactured in the manufacturing process to obtain a disk medium by the manufacturing process.

FIG. 11 is a diagram showing a configuration in which an optical sensor and an information recording medium are laminated in parallel with each other with a gap provided in the packaging void type information recording medium of the present invention.

FIG. 12 is a diagram showing an example of temperature characteristics of an information recording medium used in the present invention.

FIG. 13 is a diagram showing characteristics of a green filter used in the present invention.

FIG. 14 is a diagram showing a measurement result of a conventional sensor that does not have a photo-induced current amplification effect, unlike the photo sensor of the present invention.

FIG. 15 is a diagram showing a change in quantum efficiency during light irradiation of an optical sensor having no photoinduced current amplification effect.

FIG. 16 is a diagram showing an increase in photoinduced current during light irradiation in the photosensor having a photoinduced current amplification effect according to the present invention.

FIG. 17 is a diagram showing the quantum efficiency of photoinduced current during light irradiation in the photosensor having the photoinduced current amplification effect according to the present invention.

[Explanation of symbols]

 1 1st board | substrate 2 image formation part 3 1st electrode layer 4 light reflection layer 5 3rd electrode layer 6 2nd board | substrate 7 2nd electrode layer 8 current monitor electrode layer 9 4th electrode layer 10th 3 electrode terminal 11 void forming layer 12 void 13 fourth electrode terminal 14 first electrode terminal 15 second electrode terminal 16 current monitoring electrode terminal 17 address bar 18 storage case 19 shutter 20 surface opening 21 photoconductivity Layer 22 Liquid crystal recording layer 23 Back opening 24 Drive hole 25 Transmittance change monitor 26, 27 Clean paper 28 Optical sensor 29 Information recording medium 30 Charge generation layer 31 Charge transport layer 32 Power supply 33 Switch 34 Resistance

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoyuki Idehara 1-1-1 Ichigayaka-cho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd.

Claims (7)

[Claims] 1. A liquid crystal recording medium in which a first electrode layer is laminated on a first substrate, a liquid crystal recording layer in which liquid crystal is dispersed and fixed in a resin is laminated, and a second electrode layer is formed on a transparent second substrate. A disk substrate in which a liquid crystal recording layer and an optical sensor formed with a photoconductive layer are laminated with an air layer interposed so that the liquid crystal recording layer and the photoconductive layer face each other, and the void-shaped information recording medium is formed into a rectangular shape and a hole is formed in the center thereof. A packaging void type information recording medium, which is formed in a plurality of radial shapes on the top and is rotatably housed in a housing case having a window portion opened and closed by a shutter. 2. The packaging void type information according to claim 1, wherein a light reflection layer for liquid crystal transmittance monitor is formed in a non-image area of the void type information recording medium formed in a rectangular shape. recoding media. 3. A current monitoring electrode on the opposite side of the second electrode layer of the photosensor via the photoconductive layer in the non-image area of the void type information recording medium formed in the rectangular shape. The packaging void type information recording medium according to claim 1, wherein a layer is formed. 4. One of the first substrate and the transparent second substrate has a larger size than the other, and an electrode terminal is formed in a protruding portion from the other of the one by laminating. The packaging void type information recording medium according to claim 1, wherein 5. A packaging void type information recording medium according to claim 1, wherein an address information recordable region is formed in a non-image portion region of the rectangular void type information recording medium. . 6. The packaging according to claim 1, wherein an area where address information can be recorded is formed on the back side of the base material on which the void type information recording medium formed in the rectangular shape is formed. Void type information recording medium. 7. The packaging void type information recording medium according to claim 1, wherein a region capable of recording photographic information is formed in a non-image portion region of the void type information recording medium formed in a rectangular shape. .