JPH031342A - Charge image recording medium and recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the deterioration in S/N in recording contents by the dark current over a long period of time by adopting the constitution to allow the separate correspondence of an electrode to the recording traces recorded and formed apart guard bands of a prescribed width on a charge image recording medium. CONSTITUTION:The moving electrode Em is moved to the sequential recording traces in such a manner as to correspond to the recording traces under recording by the electromagnetic radiation flux (laser beam flux) Pl which is made incident on a recording head WH and includes the information to be recorded. Discharge is, therefore, executed only in the recording traces where the recording by the electromagnetic radiation flux (laser beam flux) is executed by the electric field formed by a power source Vw connected to the transparent electrode Etw and electrode Ed of the recording head WH. The overall increase of potential by the generation of the charge image based on the dark current for the long period of time until the state where the region of the charge image recording medium D do not face the recording head WH at the time of the recording is, therefore, obviated. The deterioration in the S/N of the contents is prevented in this way.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a charge image recording medium and a recording/reproducing device.

(Prior Art) As the demand for recording various information signals at high recording density has increased, in recent years, information signals have been recorded using recording media created based on various structural and operating principles. It is well known that high-density recording and reproducing has been carried out. Conventionally, the bit-forming type, the bubble or unevenness-forming type, the magneto-optical type, and the phase-change type (where the transmittance of light is changed by thermal energy).

Various formats have been proposed, which can be roughly divided into types such as thermal transformation type (which causes changes in reflectance, absorption rate, etc.), as well as recording,
Many proposals have been made regarding recording media in which the reproducing operation is performed using energy other than light, and various proposals have also been made regarding recording and reproducing apparatuses using these recording media.

However, in the conventional recording and reproducing apparatuses using the various types of recording media described above, the configuration of the apparatus for performing high-density recording is complicated and large-scale, and erasable recording media are also For example, in the case of a magnetic recording medium, erasing is easy, but on the other hand, there is a problem in terms of high-density recording, and in the case of an optical disk, for example, high-density recording However, there is a problem in that it cannot be erased by simple means.

In order to solve the above-mentioned problems, the applicant company has developed a transparent electrode into which the laser beam is incident, a photoconductive layer member into which the laser beam which has passed through the transparent electrode is incident, and a transparent electrode which is connected to the transparent electrode. A charge image recording medium comprising an electrode for forming an electric field between the photoconductive layer member and the electrode, and a charge retaining layer that retains the electric charge generated in response to the electric field between the photoconductive layer member and the electrode; changing the electric field between the layer member and the electrode according to the information signal to be recorded;
A means for generating a charge pattern corresponding to an information signal to be recorded on a charge retention layer member in a charge image recording medium; A recording and reproducing device using a charge image is provided, which includes a reading means based on a potential difference between a surface on which a charge pattern is formed and the electrode.

FIG. 6 is a block diagram showing the configuration of m pieces of the above-mentioned charge image recording and reproducing apparatus, and in this FIG. 6, D is a charge image recording medium disk (hereinafter simply referred to as charge image recording medium). The charge image recording medium shown in FIG. 6 has a laminated structure of a charge retention layer member IL and an electrode E.

The charge retention layer member IL described above is made using a material (for example, silicone resin) having an extremely high insulation resistance value that can retain the charges attached thereon for a long time. The charge retention layer component structure may be configured in other configurations.

This charge image recording medium is rotated at a predetermined rotational speed by a rotation drive mechanism (not shown). In Figure 6, WA is the electromagnetic radiation flux whose intensity is modulated by the information signal being recorded (in the following description, the electromagnetic radiation flux will be described as a laser beam, and the generation of electromagnetic radiation). This is a recording system configured to emit a light source (the source is described as a laser light source) from a lens 7, and the recording system WA in the illustrated example includes a laser light source 1, a lens 2, a polarizer 3, and an optical modulator 4. ．． Information signal source targeted for recording5. It is composed of an analyzer 6 and a lens 7, and RA in FIG. 6 reads out an information signal recorded in the form of a charge image on a charge image recording medium with a laser beam,
This is a reproduction system that outputs as an electrical signal, and the 6th
In the illustrated example, the laser light source 2, lenses 9, 12,
15° polarizer 10, beam splitter 11. Wave plate 13
゜Analyzer 14, photoelectric converter 16. Amplifier 17. It is composed of an output terminal 18 and the like.

The laser beam emitted from the lens 7 of the recording system WA is transmitted through the transparent electrode Etw of the recording head WH, which is composed of a laminated structure of a transparent electrode Etw and a photoconductor layer PCE, and is applied to the photoconductor layer PCH. .

Since a voltage is applied from Vw between the transparent electrode Etw of the recording head WH and the electrode E of the charge image recording medium, the intensity is modulated by the information signal from the recording system WA. When the laser beam enters the photoconductor layer PCE of the recording head WH, the electrical resistance value of the portion of the photoconductor layer PCE to which the laser beam is applied decreases, and the charge retention layer member of the charge image recording medium decreases in that portion. A discharge occurs between the IL and the charge retention layer member I of the charge image recording medium.
Charges corresponding to the information signal are attached to the surface of L.

The charge image corresponding to the above-mentioned information signal is reproduced by the reproduction system as follows. The light modulating material layer PML in the detection head is composed of a dielectric mirror DML, a light modulating material layer PML made of a material such as lithium niobate single crystal, and a transparent electrode Etr. The electric field generated by the charge image attached to the surface of the charge retention layer member IL changes the polarization plane of the light passing therethrough, so that the laser beam emitted from the lens 12 of the reproduction system RA is directed to the light modulating material layer. After passing through the PML, the light is reflected by the dielectric mirror DML and enters the lens 12 again.
The plane of polarization changes in correspondence with the charge image on the surface of L.

The light incident on the lens 12 as described above, that is, the light whose polarization plane has changed corresponding to the charge image attached to the surface of the charge retention layer member IL of the charge image recording medium, is transmitted to the beam splitter 11. and the wave plate 13 to the analyzer 14.

The analyzer 14 emits light whose intensity changes in accordance with the change in the plane of polarization of the light incident thereon, which is focused by the lens 15 and given to the photoelectric converter 16. is photoelectrically converted.

The output signal of the photoelectric converter 16 is amplified by the amplifier 17, so that the original information signal is output from the output terminal 18 in the reproduction system.

By the way, in the above-mentioned charge image recording and reproducing device, by using a laser beam with a sufficiently small diameter, it is possible to easily record and reproduce information from a charge image recording medium recorded at a high recording density with a simple device. However, in order to successfully reproduce recorded contents recorded at high recording density, it is necessary to drive and displace the reproduction element under tracking control, and for this purpose, the applicant company We previously proposed a playback device as shown in FIG.

FIG. 7 is a block diagram of a previously proposed charge image reproducing device in which a tracking control method is applied to the reproducing element of the charge image recording reproducing device.

FIG. 8 is a block diagram of the tracking control system.

In FIG. 7, the charge image recording medium has a laminated structure of a charge retention layer member IL and an electrode E, similar to the charge image recording medium already described with reference to FIG.

This charge image recording medium is rotated at a predetermined rotational speed by a rotation drive mechanism (not shown). Further, WA in FIG. 7 is a laser beam [1, lens 2° polarizer 3. optical modulator 4,
Information signal source targeted for recording5. Analyzer6. This is a recording system constituted by a lens 7, and the manner of recording by this recording system WA shown in FIG. 7 is the same as that of the recording system already described with reference to FIG.

RA in FIG. 7 is a reproducing system that uses a laser beam to read out information signals recorded in the form of charge images on a charge image recording medium and outputs them as electrical signals, including a laser light source 2, a lens 9, 12, 15, polarizer 10. Beam splitter 11. The components of the wave plate 13 and analyzer 14 are the same as those of the reproduction system described above with reference to FIG. 6, except that the photoelectric converter 16, amplifier 17, . The output terminal 18 part is a photoelectric conversion cable P D a = P D
The configuration has been changed to include parts such as the split photodetector PD having the d, the tracking control circuit 1'SC, and the actuator ACT.

The laser beam emitted from the lens 7 of the recording system WA is transmitted through the transparent electrode Etw of the recording head WH, which is composed of a laminated structure of a transparent electrode EtW and a photoconductor layer PCE, and is applied to the photoconductor layer PCE. .

Since a voltage is applied from the power supply Vw between the transparent electrode Etw of the recording head WF (described above) and the f1! pole E of the charge image recording medium, the intensity can be changed by the information signal from the recording system WA as described above. When the modulated laser beam enters the photoconductor layer PCE of the recording head WH, the photoconductor layer P
The electrical resistance value of the portion of the CE to which the laser beam is applied decreases, and a discharge occurs between the portion and the charge retention layer member IL of the charge image recording medium, thereby reducing the charge retention of the charge image recording medium. Charges corresponding to the information signal are attached to the surface of the layer member IL, and the information signal to be recorded is recorded as a charge image.

The charge image corresponding to the information signal recorded as described above is reproduced by the reproduction system in the following manner. The light modulating material layer PML in the detection head, which is composed of a dielectric mirror DML, a light modulating material 5PML made of a material such as a lithium niobate single crystal, and a transparent electrode Etr, is a charge image recording medium. The electric field generated by the charge image attached to the surface of the charge retention layer member IL changes the polarization plane of the light passing through it, so that the laser beam emitted from the lens 12 of the reproduction system RA is
After passing through the light modulating material Jli9PML, vI? ! The light that is reflected by the body mirror DMT and enters the lens 12 again is reflected by the charge retention layer member I of the charge image recording medium described above.
The plane of polarization changes in correspondence with the charge image attached to the surface of L.

The light incident on the lens 12 as described above, that is, 11
The light whose polarization plane changes corresponding to the charge image adhering to the surface of the charge retention layer member rr of the charge image recording medium (1) is passed through the beam splitter 11 and the wavelength plate 13 to the analyzer 14, the analyzer 14 emits light whose scene changes in accordance with the change in the polarization plane of the light incident thereon, which is focused by the lens 15 and sent to the photoelectric conversion element P. A split photodetector PD is fed with D a = P D d.

As shown in FIG. 8, the four photoelectric conversion elements P D
= Output signal S a from P D d The output signal Sa from the photoelectric conversion cable PDa in S d and the output signal Sc from the photoelectric conversion cable PDc are generated by the adder 19 in the tracking control signal generation circuit TSC. The output signal sb from the photoelectric conversion element PDb in the output signal Sa-%-8d from the four photoelectric conversion elements PD a '' PD d constituting the above-mentioned split photodetector PD is added. , and the output signal Sd from the photoelectric conversion element PDd are added by the adder 20 in the tracking control signal generation circuit TSC.

The output signal (Sa+Sc) from the adder 19 described above and the output signal (Sb+Sd) from the adder 20 are added by the adder 21, and the reproduced signal (Sa+Sb+Sc+Sd) is output from the adder 21 to the output terminal 18. Sent out.

Further, the output signal (Sa+Sc
) and the output signal from the adder 20 (sb+Sd)
In the subtracter 22, ((Sa+5c)−(Sb+
5d)) is performed, and the output signal from the subtraction circuit 22 is phase-compensated in the phase compensation circuit PC and made into a tracking M control signal, which is supplied from the output terminal '23 to the actuator ACT. The reproducing element is driven and displaced in a direction perpendicular to the extending direction of the recorded trace for tracking control.

In the previously proposed charge image reproducing device shown in FIG. A tracking control signal is generated and supplied to the actuator, and the above-mentioned actuator drives and displaces the reproducing element in a direction perpendicular to the extending direction of the recorded trace for tracking control. It has also been proposed that information for tracking control can be generated by changing the geometrical shape of the medium so that the tracking control operation can be performed better.

(Problems to be Solved by the Invention) FIG. 9 shows that in a charge image recording medium having a laminated structure of a charge retention layer member IL and an electrode E, the charge retention layer member IL and the electrode E are connected to a substrate in a so-called brigroove optical disk. The recording head WH is formed on the surface of the charge retention layer member IL in the charge image recording medium, which is configured to exhibit an uneven shape that can perform the same effect as the tracking control grooves provided on the surface. FIG. 10 shows an enlarged view of the charge image recording medium at the circle Z in FIG. 9; In this case, the charge retention layer member IL and the electrode E in the charge image recording medium act in the same manner as the tracking control grooves formed on the surface of the substrate in a so-called bri-groove optical disk, and exhibit a ridge-like uneven shape. The state in which it is configured as a thing is shown. TP in FIG. 10 is the recording trace interval (track pitch).

With reference to FIGS. 9 and 10, the recording trace interval 'rp of the charge image recording medium shown in FIG. The width W of the recording head WH in the width direction is, for example, such that the recording trace interval Tp is 1.6 microns and the width W of the recording head WH is 6 millimeters, and generally W>=f''
There is a relationship of p.

Assume that the charge image recording medium is rotating at 1800 revolutions per minute, and that the recording position moves one recording trace to the adjacent recording trace with each revolution of the charge image recording medium. The recording trace interval Tp of the charge image recording medium described above is, for example, 1.6 microns, and the width W of the recording head WH (width of the recording head WH in the width direction of the recording traces on the charge image recording medium) is, for example, 6 millimeters. Assuming that the recording head WH moves by 1.6 microns in the radial direction of the charge image recording medium for each rotation of the charge image recording medium, the above-mentioned recording head W LI at the start of recording. It takes about 2 minutes for the area of the charge image recording medium that corresponds to the leading edge in the moving direction to be in a state where it does not face the recording head WH.

By the way, the transparent type tf of the recording head WH, which is disposed facing the recording portion of the charge image recording medium during the recording operation,
iEtw and t' of the charge image recording medium! Since a voltage is applied from the electric current i1JXVw to the pole E, when the laser beam whose intensity is modulated by the information signal as described above enters the photoconductor layer PCE of the recording head WH, the photoconductor In IPcE, the electrical resistance value of the portion to which the laser beam is applied decreases, and a discharge occurs between the portion and the charge retention layer member IL of the charge image recording medium, thereby reducing the charge retention of the charge image recording medium. Charges corresponding to the information signal are attached to the surface of the layer member IL, and the recording head WH
Since the electric field from the power supply Vw described above is always applied between the entire surface of the transparent electrode Etw and the charge image recording medium, the aforementioned laser beam in the photoconductor layer PCE of the head WH is Regarding the charge image recording medium (l) which faces the portion other than the portion where the image is displayed, the entire charge image is generated due to the generation of a charge image based on the dark current over a long period of time in the photoconductor layer PCE of the recording head WH. A problem arises in that the potential increases and the S/N of recorded content deteriorates.

(Means for Solving the Problems) The present invention provides a charge image recording medium in which at least a charge retention layer member and an electrode are laminated, and as the electrode, a recording is formed on the charge image recording medium with a guard band of a predetermined width separated therefrom. A charge image recording medium using a structure that individually corresponds to the sequential recording traces to be recorded, and a charge image recording medium using a structure in which at least a charge retention layer member and an electrode are laminated. As the fttt4i, recording on a charge image recording medium using a structure that individually corresponds to the sequential recording traces to be recorded on the charge image recording medium at intervals of a predetermined guard band. The f! ! In order to form an electric field between the pole and the electrode provided in contact with the photoconductive layer member to which the electromagnetic radiation flux containing the information to be recorded is applied, recording in the charge image recording medium described above is performed. A recording/reproducing device comprising a moving electrode electrically connected to an electrode corresponding to a recording trace where a recording is being performed, and a charge image recording medium comprising at least a charge retention layer member and an electrode laminated. The above l! As a pole, sequential recording in a charge image recording medium using a structure that individually corresponds to the sequential recording traces to be recorded on the charge image recording medium with guard bands of a predetermined width apart. Pd is the pitch of the electrode corresponding to the recording trace.
In addition, let N be the number of moving recording traces per second, and furthermore, let T be the time value corresponding to the exposure amount at the point where the curve rises in the characteristic curve showing the relationship between the n light amount and the surface potential of the charge image recording medium. Furthermore, when the length in the moving direction of the moving electrode to be electrically connected to the electrode corresponding to the recording trace where recording is being performed on the charge image recording medium is L, the above-mentioned movement A recording/reproducing device is provided that uses a moving electrode having a size such that the length L of the electrode in the moving direction satisfies the following formula: L<Pd-N-T (A) (A).

(Function) By making the electrodes in the charge image recording medium correspond to each recording trace, the electrodes of the recording head having a wide area can be used.

To apply an electric field only between a recording trace to be recorded and a recording head.

Therefore, during recording, a moving electrode is brought into contact with the recording trace on the charge image recording medium on which information is being recorded, and the recording trace on the charge image recording medium on which information is being recorded is connected to the recording head electrode. An electric field should be formed only between the

Furthermore, let Pd be the pitch of the electrodes corresponding to the sequential recording traces on the tl charge image recording medium, let N be the number of moving recording traces per second, and let the exposure amount and the surface potential of the charge image recording medium be Let T be the time value corresponding to the exposure amount at the point where the curve rises and falls in the characteristic curve showing the relationship between When the length of the moving electrode to be electrically connected in the moving direction is L, the length I of the moving electrode in the moving direction is L<Pd-N-T (A) ( A) By using a moving electrode having a size that satisfies the formula, it is not necessary to bring the moving electrode into precise contact with the recording trace on the charge image recording medium where information is being recorded.

(Example) Hereinafter, specific contents of the charge image recording medium and recording/reproducing apparatus of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side sectional view showing a schematic configuration of the main parts of a recording/reproducing apparatus using the charge image recording medium of the present invention, FIG. 2 is a plan view of a part of the charge image recording medium of the present invention, and FIG. FIG. 1 is a plan view showing a schematic configuration of a main part of a recording/reproducing apparatus using the electrostatic image recording medium of the present invention.

FIGS. 4 and 5 are side sectional views showing the schematic structure of the main parts of a recording/reproducing apparatus using the charge image recording medium of the present invention.

In FIGS. 1 to 5, D is a charge image recording medium of the present invention, and the charge image recording medium shown in FIGS. This is an example of the case where the charge image recording medium of the present invention is used as a card-like charge image recording medium, and the charge image recording medium shown in FIGS. This is an example of a case in which it is implemented.

The charge image recording medium shown in FIGS. 1 and 2 is
As the electrodes in a disk-shaped charge image recording medium having a structure in which a charge retention layer member IL and an electrode are laminated, the electrodes are formed on sequential recording traces to be recorded on the charge image recording medium with a guard band of a predetermined width apart. This is a charge image recording medium constructed using electrodes Ed, Ed, Ed, etc., each having a configuration that individually corresponds to each other, and Pd shown in FIG. This is Ed's pitch.

By the way, when the charge image recording medium is implemented as a disc-shaped one, the records to be sequentially recorded on the charge image recording medium are, for example, concentric or spiral. , the electrodes Ed are provided at a pitch of Pd and separated by a predetermined guard band so as to correspond to the sequential recording traces of the disk-shaped charge image recording medium.

Ed... is also made into a concentric or spiral shape that corresponds to the shape of the concentric or spiral record trace.

The ffi poles Ed, Ed, etc. are provided at a pitch of Pd and separated by a predetermined guard band so as to correspond to the sequential recording traces of the disk-shaped charge image recording medium. They are constructed on the insulating substrate BP in the charge image recording medium as being electrically isolated from each other.

Note that the charge retention layer member IL in the charge image recording medium of the present invention has a structure in which the charge retention layer member IL and the electrode are laminated.
The charge retention layer member 1 is made of a material (for example, silicone resin) that has an extremely high insulation resistance value that can retain charges for a long time. In addition to L, for example, (1) a charge retention layer member IL having a laminated structure of a conductive layer member and a dielectric layer member, and (2) a charge transfer inhibiting layer member (for example, a thin layer of silicon dioxide or a thin layer of alumina is used). A charge retention layer member IL having a laminated structure of a dielectric layer member and a photoconductive layer member; A charge retention layer member IL having a laminated structure of a constituent layer made of photoconductor fine particles and a photoconductive layer member;
A charge retention layer member IL having a laminated structure of a dielectric layer member, a light modulating material layer member, and a photoconductive layer member, and a charge retention layer member IL having another gutter structure can be used.

In FIG. 1, a disk-shaped charge image recording medium is rotated by a rotation drive device (not shown), and in the charge image recording medium, electrodes Ed, which are formed on an insulating substrate BP, A moving electric current tMEm, which is moved in the direction of arrow X in Fig. 1 (the radial direction of the disc-shaped charge image recording medium), is brought into contact with the end of Ed. , a power source Vw is connected between this moving ttt pole Em and a transparent electrode EtW in the recording head WH.

The above-mentioned movable type F@Em, which contacts the ends of the electrodes Ed, Ed... formed on the insulating substrate BP in the charge image recording medium, is incident on the recording head WH during recording operation. is moved in such a way that it is electrically connected to the electrode Ed corresponding to the recording trace being recorded by the ms radiation flux (laser beam) Pn containing the information targeted for recording. It is.

Therefore, each time the charge image recording medium rotates once in the recording and reproducing apparatus shown in the first diagram, the moving electrode Em is incident on the recording head WH and the electromagnetic wave containing the information to be recorded is incident on the recording head WH. By moving the radiation flux (laser luminous flux) PQ to successive recording traces so as to correspond to the recording trace that is being recorded, the electromagnetic radiation flux (laser luminous flux) PR containing the information being recorded is Due to the electric field formed by the power source Vw connected between the transparent electrode Etw in the recording head WH where the light is incident and the electrode Ed in contact with the moving electrode Em in the electrode Ed of the charge image recording medium, The electromagnetic radiation flux (laser luminous flux) PQ containing the information targeted for recording is limited to the recording trace that is being recorded by the electromagnetic radiation flux (laser luminous flux) Pn containing the information targeted for recording. Therefore, the problems described above in the conventional device do not occur in the present invention.

By the way, in the case where the recording marks are sequentially formed on the charge image recording medium and are provided with a record trace interval Tp of 1.6 microns, for example, a guard band of a predetermined width is provided on the charge image recording medium. The pitch Pd of tt[Ed is also 1.6 microns, which is configured to individually correspond to successive recording traces that are to be recorded separately. If the electrode length J of the pole IE d is 0.5 microns, the width of the moving ffi pole Em must be 1.6 microns or less.

However, it is not easy to always make the electrode Ed and the moving electrode Em, which have minute dimensions as described above, exactly coincide with each other for each successive recording trace.

This problem is solved by assuming that the pitch of the 'fri poles corresponding to the sequential recording traces on the charge image recording medium is Pd, and the number of moving recording traces per second is N.

In the characteristic curve showing the relationship between the exposure amount and the surface potential of the charge image recording medium, the time value corresponding to the exposure amount at the point where the curve rises is set to 1, and recording is also being performed on the charge image recording medium. When the length of the moving electrode in the moving direction to be electrically connected to the electrode corresponding to the recording trace is L, the length of the moving electrode in the moving direction is as follows.

L<Pd-N-T (A) This problem can be solved by using a moving electrode Em having a size that satisfies the equation (A).

Next, referring to Figures 3 to 5, create a card shape (rectangular shape).
An example in which the present invention is applied to a charge image recording medium will be described.

3 to 5, BP is an insulating substrate in the charge image recording medium, and on the surface of this insulating substrate BP are electrodes Ed, Ed...・
are provided in parallel at a predetermined pitch Pd.

In FIG. 3, a large number of electrodes Ed are formed on the surface of an insulating substrate BP in a charge image recording medium.

In order to clearly show the arrangement pattern of Ed..., the illustration of the charge retention layer member IL provided on the upper surface of the insulating substrate BP and the many electrodes Ed, Ed... is omitted, and The illustration of the recording head WH shown in FIGS. 4 and 5 is also omitted. e in Figure 3
, a... are bent portions at the ends of the electrodes Ed, Ed..., and the movable electrode Em comes into contact with this bent portion e so that it can move.

FIG. 4 is a diagram showing a longitudinal section taken along the line A-A in FIG. Illustrated below.

It goes without saying that even in the card-shaped charge image recording media illustrated in FIGS. 3 to 5, any configuration of the charge retention layer member IL can be used as described above.

The information recording and reproducing operations for the card-shaped charge image recording medium shown in FIGS. 3 to 5 are as follows: The electromagnetic radiation flux (laser luminous flux) PQ is After the recording or reproducing operation is performed from one end of one recording trace to the other by moving the recording trace in the direction, the electromagnetic radiation flux (laser luminous flux) PQ is transferred to the arrow X shown in FIG. The electromagnetic radiation flux (laser beam) PQ described above is shown in FIG. The moving electrode E is moved in the direction of the arrow X shown by one recording trace interval.
m is also moved M, and the electrodes Ed, which are formed on the insulating substrate BP in the charge image recording medium,
The above-mentioned moving electrode Em, which is brought into contact with the end of Ed..., is exposed to the electromagnetic radiation flux (laser beam) PQ containing the information to be recorded, which is incident on the recording head WH during the recording operation. It is moved in such a way that it is electrically connected to the electrode Ed corresponding to the recording trace that is being recorded.

Therefore, in the recording and reproducing apparatuses illustrated in FIGS. 3 to 5, as well as in the recording and reproducing apparatus already described with reference to FIG. 1, the moving electrode Em is incident on the recording head WH. By moving the electromagnetic radiation flux (laser beam) Pa that contains the information targeted for recording to successive recording traces so as to correspond to the recording trace that is being recorded, the electromagnetic radiation flux containing the information that is being recorded is Radiation flux (
It is formed by a power source Vw connected between a transparent electrode Etw in the recording head WH on which the laser beam (laser beam) Pn is incident and an electrode Ed in contact with a moving electrode Em among the electrodes Ed of the charge image recording medium. Due to the electric field? Therefore, it is a recording trace that is being recorded by the electromagnetic radiation flux (laser beam) Pa containing the information targeted for recording. Since the discharge corresponding to the laser beam ()Pa is generated, the problems described above in the conventional apparatus do not occur in the present invention.

Another problem is that it is not easy to make the electrode Ed and the movable electrode Em, which have minute dimensions, always match accurately for each successive recording trace. Let Pd be the pitch of the corresponding electrodes, let N be the number of movement records per second, and further,
Let T be the time value corresponding to the exposure amount at the point where the curve rises in the characteristic curve showing the relationship between the exposure amount and the surface potential of the charge image recording medium. When the length in the moving direction of the moving electrode to be electrically connected to the electrode corresponding to the trace is L, the length L in the moving direction of the moving electrode described above is L<Pd-N- T...(A) This problem can be solved well by applying the solution already described with reference to FIG. I can do it.

When applying automatic tracking control and automatic focus control to the recording/reproducing apparatus of the present invention, the conventional technique with reference to FIGS. 7 and 8 may be used.

(Effects of the Invention) As is clear from the above detailed explanation, the present invention provides a charge image recording medium having a charge retaining layer member and an electrode laminated together. A charge image recording medium using a configuration that individually corresponds to the sequential recording traces to be recorded across a width guard band, and at least a charge retention layer member and an electrode are laminated. The electrodes in the charge image recording medium may be configured to correspond individually to the sequential recording marks to be formed on the charge image recording medium at predetermined intervals of 111 guard bands. an electrode corresponding to a recording trace where recording is being performed in the charge image recording medium used; and a photoconductive layer member provided in contact with an electromagnetic radiation flux containing information to be recorded. Recording comprising a moving electrode electrically connected to the electrode corresponding to the recording trace on the charge image recording medium described above, in order to form an electric field between the electrode and the electrode. As the electrode in a reproducing device and a charge image recording medium in which at least a charge retention layer member and an electrode are laminated, the recording traces to be recorded in sequence on the charge image recording medium separated by a guard band of a predetermined width are used. Pd is the pitch of the electrodes corresponding to the sequential recording traces in the charge image recording medium using a configuration that corresponds to each other individually.

Let N be the number of moving recording traces per second, furthermore, let T be the time value corresponding to the exposure amount at the point where the curve rises in the characteristic curve showing the relationship between the exposure amount and the surface potential of the charge image recording medium, and furthermore, , when L is the length in the moving direction of the moving electrode to be electrically connected to the ffi pole corresponding to the recording trace on the charge image recording medium,
The length of the moving electrode described above in the moving direction is L<Pd-N-T... (A) A movement of such a magnitude that it satisfies the formula (A)! I! 1Ittt
Since this is a recording/reproducing apparatus using poles, in the present invention, the moving electrode Em is incident on the recording head WH and records with the electromagnetic radiation flux (laser beam) pQ containing the information to be recorded. By moving the electromagnetic radiation flux (
A power supply Vw is connected between the transparent electrode Etw in the recording head WH on which the laser beam (laser beam) pQ is incident and the electrode Ed in contact with the movable 7-pole Em among the electrodes Ed of the charge image recording medium. Due to the electric field formed by
The electromagnetic radiation flux (laser luminous flux) PQ containing the information targeted for recording is limited to the recording trace that is being recorded by the electromagnetic radiation flux (laser luminous flux) PQ containing the information targeted for recording. Therefore, the recording trace interval Tp of the tri image recording medium and the width w of the recording head WH (the recording head WH in the width direction of the recording trace on the ffi image recording medium) The width W) is in the relationship W>T'p, and ? ! [! If it takes a long time for the area of the charge image recording medium that corresponds to the leading edge in the moving direction of the recording head WH at the start of recording to become no longer facing the recording head WH, the conventional apparatus The above-mentioned problem that has arisen is that the transparent electrodes E and W of the recording head WH and the electrodes E of the charge image recording medium, which are arranged opposite to the recording portion of the charge image recording medium during the recording operation, A voltage is applied from the power source VW between the two, and an electric field from the power source Vw is constantly applied between the entire surface of the transparent electrode Etw in the recording head WH and the charge image recording medium. Regarding the charge image recording medium facing the part other than the part to which the recording laser beam is applied in the photoconductor 1fJPcE of the recording head WH, the long-term dark current in the photoconductor layer PCE of the recording head WH In the present invention, the problem that the overall potential increases due to the generation of a charge image and the S/N of the recorded content deteriorates does not occur in the present invention. There is also the problem that it is not easy to always match each successive recording trace accurately. Let the number of movement records per hit be N, and furthermore,
In the characteristic curve showing the relationship between the exposure amount and the surface potential of the charge image recording medium, the time value corresponding to the exposure amount at the point where the curve rises is defined as T, and furthermore, recording is being performed on the FFI charge image recording medium. When the length of the moving electrode in the direction of movement of the moving electrode to be electrically connected to the electrode corresponding to the recording trace is L, the length L of the moving electrode in the moving direction as described above is.

L<Pd-N-T (A) This can be solved well by using a moving electrode Em of a size that satisfies the equation (A).

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a schematic configuration of the main parts of a recording/reproducing apparatus using the charge image recording medium of the present invention, FIG. 2 is a plan view of a part of the charge image recording medium of the present invention, and FIG. 4 and 5 are plan views showing a schematic configuration of the main parts of a recording and reproducing apparatus using the charge image recording medium of the present invention, and FIGS. 4 and 5 show the main parts of a recording and reproducing apparatus using the charge image recording medium of the present invention. A side sectional view showing a schematic configuration,
6 to 8 are block diagrams of a conventional recording 111 production device, and FIGS. 9 and 10 are side sectional views for explaining problems with the conventional device. l... Laser light source, 2, 9, 12.15... Lens. 3... Polarizer, 4... Light modulator, 5... Information signal source targeted for recording, 6... Analyzer, 7...
lens. RA... Reproduction system, 10... Polarizer, 11... Beam splinter, 13... Wave plate, 14... Analyzer,
16... Photoelectric converter, 17... Amplifier, 18...
Output terminal. 19.20...Adder, 22...Subtractor (subtraction circuit). pc...phase compensation circuit, 23...output terminal, D...
・Charge image recording medium, IL...Charge retention layer member, E...
・Electrode, WA...recording system, Etw...transparent electrode, P
CE...photoconductor layer, E...electrode, DML...dielectric mirror PML...light modulating material layer, PD...divided photodetector having photoelectric conversion elements PDa to PDd, TSC
...Tracking control circuit, ACT...actuator. 1゛p... Recording trace interval (track pitch), WII.
...recording head, Vw...power supply, Pd...electrode pitch. N: Number of moving recording traces per second, T: Time value corresponding to the exposure amount at the point where the curve rises on the characteristic curve showing the relationship between the exposure amount and the surface potential of the charge image recording medium, L.・
・Length in the moving direction of the moving electrode that should be electrically connected to the electrode corresponding to the recording trace on the charge image recording medium, Ed... Electrode, Patent applicant: Victor Japan Co., Ltd. Procedural amendment (voluntary) 1. Display of the case 1989 Patent Application No. 85248 2, name of the invention 3゜Relationship with the case Patent Applicant Location 3-12 Moriya-cho, Kanayō-ku, Yokohama-shi, Kanagawa Prefecture Name (432) Japan Victor Co., Ltd. 4, Agent 7, Contents of the Amendment The attached drawings Figures 7 and 8 are amended as shown in the attached sheet.

Claims (1)

[Scope of Claims] 1. As the electrodes in a charge image recording medium in which at least a charge retention layer member and an electrode are laminated, the electrodes are sequentially formed on the charge image recording medium with a guard band of a predetermined width apart. As the electrode in a charge image recording medium 2 using a structure that individually corresponds to the recording traces of the charge image recording medium 2, a charge image recording medium having a stack of at least a charge retention layer member and an electrode, Recording is being performed on a charge image recording medium using a structure that individually corresponds to the sequential recording traces to be recorded on the charge image recording medium with guard bands of a predetermined width apart. In order to form an electric field between an electrode corresponding to a recording trace and an electrode provided in contact with the photoconductive layer member to which a flux of electromagnetic radiation containing the information to be recorded is applied, A recording/reproducing device 3 is provided with a moving electrode electrically connected to an electrode corresponding to a recording trace where recording is being performed on the charge image recording medium described above, and includes at least a charge retention layer member and an electrode. The electrodes in the stacked charge image recording medium may have a configuration in which they correspond individually to the sequential recording marks to be recorded on the charge image recording medium with a guard band of a predetermined width apart. Let Pd be the pitch of the electrodes corresponding to the sequential recording traces in the charge image recording medium using Pd, and
Let N be the number of moving recording traces per second, furthermore, let T be the time value corresponding to the exposure amount at the point where the curve rises in the characteristic curve showing the relationship between the exposure amount and the surface potential of the charge image recording medium, and furthermore, , where L is the length in the moving direction of the moving electrode that is to be electrically connected to the electrode corresponding to the recording trace where recording is being performed on the charge image recording medium. A recording/reproducing device using a moving electrode having a size such that the length L satisfies the formula: L<Pd・N・T...(A) (A)