JPH05273819A - Image forming device - Google Patents

Abstract

PURPOSE:To realize an electrophotographic process without requiring precharge which accompanies the generation of ozone by providing a plurality of photoelectric conversion bodies arranged two-dimensionally on an electrostatic latent image forming body, and applying prescribed potentials to all the island-like electrodes of the electrostatic latent image forming body without using corona charge. CONSTITUTION:Reflected light from an original, led by an original scanning part, is photoelectrically converted into an electric signal by a photoelectric conversion part, and this electric signal is inputted to an LED head part 2 provided in the electrostatic latent image forming body l which forms an electrostatic latent image. An electrostatic latent image is formed by exposing the electrostatic latent image forming body 1 by means of the LED head 2 according to the input electric signals, thereby causing the two-dimensionally arranged island-electrodes to produce a potential contrast. This electrostatic latent image is developed and transferred to an image forming body medium and fixed thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electronic copying machine or a page printer which uses an electrophotographic process.

[0002]

2. Description of the Related Art Conventionally, in an electrophotographic process used in an image forming apparatus such as an electronic copying machine or a page printer, a photoconductor is used as a photoelectric conversion body for converting an optical image into an electrostatic latent image. Such a photoreceptor is imagewise exposed after being precharged (charged) by a corona charger or the like. Due to the photoconductive effect of the photoconductor, the charge in the exposed area is neutralized and disappears. The electric charge is maintained in the non-exposed area.
In this way, the light image is converted into a charge image. The charge image is visualized by development with toner, and the toner image is transferred and fixed on the recording medium.

Such an electrophotographic process has the characteristics of high speed and high image quality, and in response to the demands for high image quality, high speed, and low running cost of the hard copy device, the main recording system of the hard copy device will continue in the future. It seems to be used as.

However, in recent years, as copiers and page printers are widely and widely used in offices, the influence of these devices on the office environment has become a problem. In particular, in consideration of the effects of ozone generated from corona chargers on the human body, generation and leakage of ozone from these devices are strictly regulated and legislated. Environmental problems will continue to be important issues, and regulations on ozone are becoming more and more strict, and further reduction of ozone is desired. Therefore,
An image forming apparatus using an electrophotographic process as a recording process that does not generate ozone is strongly desired.

[0005]

SUMMARY OF THE INVENTION As described above, an object of the present invention is to provide an image forming apparatus that can use an electrophotographic process as a recording process that does not generate ozone.

[0006]

An image forming apparatus according to the present invention includes a transparent insulating substrate, a first transparent electrode provided on one surface of the transparent insulating substrate, and the first transparent electrode. A first light-shielding electrode provided between the light-transmitting electrode and the light-transmitting electrode, and a light-shielding insulating layer provided so as to project from the first light-shielding electrode into the opening; The first light-transmissive electrode, the first light-shielding electrode, and the photoconductor laminated over the insulating layer, the first light-transmitting electrode, and the first light-shielding electrode are opposed to each other. An island-shaped electrode having a first functional electrode section and a second functional electrode section provided as a first function electrode section, and a first function between the first functional electrode section and the first light-shielding electrode. And a plurality of photoelectric conversion bodies each having a second functional portion formed between the second functional electrode portion and the first light-transmissive electrode. And a means for generating a predetermined potential with respect to all of the island-shaped electrodes, and an electrostatic latent image forming body for forming an electrostatic latent image corresponding to the incident exposure image. According to image information, light is incident on the photoelectric conversion body from the other surface of the translucent insulating substrate,
An exposure unit that selectively changes the potential of the island-shaped electrode according to this exposure to form an electrostatic latent image, and a developer image by developing the electrostatic latent image formed by this exposure unit with a developer. Developing means for forming the image forming means, transfer means for transferring the developer image formed by the developing means onto the image forming medium, and fixing means for fixing the developer image transferred by the transferring means on the image forming medium. It consists of and.

The photoelectric conversion body of the present invention includes a transparent insulating substrate, a first transparent electrode provided on one surface of the transparent insulating substrate, and the first transparent electrode. A first light-shielding electrode provided with an opening between them, a light-shielding insulating layer provided so as to project from the first light-shielding electrode into the opening, and the first light-transmitting property A photoconductor laminated over the electrode, the first light-shielding electrode and the insulating layer, and a second light-shielding electrode formed on the photoconductor so as to face the first light-transmitting electrode. A light-transmitting member having the first light-shielding electrode, a first functional electrode portion provided to face the insulating layer, and a second functional electrode portion formed on the second light-shielding electrode. Island-shaped electrode, a first functional portion is formed between the first functional electrode portion and the first light-shielding electrode, and the second functional electrode portion and the first transparent electrode are formed. A second functional portion is formed between the first functional portion and the second functional portion depending on whether the light receiving surface of the incident light is the transparent insulating substrate side or the transparent island electrode side. One of the two functional portions serves as a photoconductive functional portion and the other serves as a capacitor functional portion, and a predetermined potential is generated in an island-shaped electrode connecting the photoconductive functional portion and the capacitor functional portion, and the photoconductive functional portion is connected to the photoconductive functional portion. The potential of the translucent island-shaped electrode connected to the capacitor function section is variable depending on the incident light.

The electrostatic latent image forming body of the present invention comprises a transparent insulating substrate, a first transparent electrode provided on one surface of the transparent insulating substrate, and the first transparent substrate. First light-shielding electrode provided with an opening left between the first light-shielding electrode and the light-shielding electrode, a light-shielding insulating layer provided so as to project from the first light-shielding electrode into the opening, and the first light-shielding electrode. A photoconductor laminated over the translucent electrode, the first light-shielding electrode, and the insulating layer, and a second light shield formed on the photoconductor so as to face the first translucent electrode. Conductive electrode, the first light-shielding electrode, and a first functional electrode portion provided facing the insulating layer and a second functional electrode portion formed on the second light-shielding electrode. And a first functional portion formed between the first functional electrode portion and the first light-shielding electrode, and the second functional electrode portion and the first functional electrode portion. A second functional portion is formed between the transparent electrode and the first functional portion depending on whether the light receiving surface of the incident light is the transparent insulating substrate side or the transparent island electrode side. And a plurality of photoelectric conversion bodies, one of which is a photoconductive function portion and the other of which is a capacitor function portion, are two-dimensionally arranged corresponding to pixels, and the first translucent electrode and the first light transmissive electrode are provided. The light-shielding electrodes of the first common electrode and the second common electrode
And a predetermined voltage is applied between the first and second common electrodes to generate a predetermined potential on the translucent island-shaped electrode group, and the light-receiving surface for incident light is A photoconductive function group and a capacitor function group are formed depending on whether the light-transmissive insulating substrate side or the light-transmissive island electrode side is formed, and the light-transmitted light connected to the capacitor function group according to the amount of light incident on the photoconductive function group. It is configured to generate a potential contrast in the island-shaped electrode group.

[0009]

The image forming apparatus of the present invention is provided with a plurality of photoelectric conversion bodies arranged two-dimensionally on the electrostatic latent image forming body, without using a corona charger, and the electrostatic latent image forming body is shaped like an island. A predetermined potential is applied to all of the electrodes, and exposure is performed by an exposure means to generate a potential contrast on the two-dimensionally arranged island-shaped electrodes to form an electrostatic latent image, and the electrostatic latent image is developed. The image is transferred and fixed on the image forming medium.

In the photoelectric conversion body of the present invention having the above-described structure, the photoelectric conversion body has the first functional portion depending on whether the light-receiving surface for incident light is the transparent insulating substrate side or the transparent island electrode side. One of the second functional parts is a photoconductive functional part and the other is a capacitor functional part, and the potential of the translucent island electrode connected to the capacitor functional part is variable by the light incident on the photoconductive functional part. is there.

In the electrostatic latent image forming body of the present invention, in the above structure, the light receiving surface of the incident light is light-transmitted depending on whether the light-transmitting insulating substrate side or the light-transmitting island-shaped electrode side. A conductive function group and a capacitor function group are formed, and the potential of the translucent island-shaped electrode group connected to the capacitor function group is given a predetermined potential depending on the presence or absence of light incident on the photoconductive function group from the exposure means. By creating a contrast and electrostatic latent image according to the incident light on the translucent island electrode group without using a corona charger, the translucent island electrode is provided corresponding to the pixel. A pixel having a uniform electric potential in the size of the pixel and having a fixed positional relationship between the pixels is formed, and pixels having no pitch unevenness are formed over the entire transparent island-shaped electrodes that are two-dimensionally arranged.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the internal construction of a copying machine as an example of the image forming apparatus of the present invention. This copying machine is composed of an original scanning unit (not shown) and an image forming unit that combines an electrophotographic system capable of forming an image on an image forming medium.

The reflected light from the document guided by the document scanning unit is photoelectrically converted into an electric signal by a photoelectric conversion unit (not shown),
This electric signal is input to the LED head unit 2 provided inside the electrostatic latent image forming body 1 that forms an electrostatic latent image. By exposing the electrostatic latent image forming body 1 with the LED head 2 in response to the inputted electric signal, an electrostatic latent image corresponding to the reflected light from the original is formed on the electrostatic latent image forming body 1. It Around the electrostatic latent image forming body 1, a developing unit 3 for developing the electrostatic latent image on the electrostatic latent image forming body 1 into a toner image as a visible image by using toner, the electrostatic latent image forming body. 1. A transfer roller 4 that transfers the toner image on the sheet 1 onto a sheet, a cleaner 5 that cleans the surface of the electrostatic latent image forming body 1, and a light source 7 that removes electricity by applying light from both sides of the electrostatic latent image forming body 1. Are arranged. Further, in this embodiment, the developing device 3 is installed at a position facing the LED head portion 2 (via the electrostatic latent image forming body 1). However, they do not necessarily have to face each other.

In the LED head portion 2, a large number of light emitting diodes (LEDs) are linearly arranged. In this case, the number of light emitting diodes (LEDs) arranged linearly is determined by the exposure width for exposing the electrostatic latent image forming body 1. The LED head unit 2 exposes the inner surface (back surface) of the rotating electrostatic latent image forming body 1 with an electric signal from a photoelectric conversion unit (not shown), and an electrostatic latent image is formed on the surface of the electrostatic latent image forming body 1. To be done.

In the developing device 3, a toner containing a dye and formed of resin and a carrier are mixed. The toner is triboelectrically charged by being stirred in the developing device 3, and has a charge having a polarity different from that of a potential appearing on an island-shaped electrode (not shown) of the electrostatic latent image forming body 1 described later. The electrostatic latent image is formed by exposing from the back surface of the electrostatic latent image forming body 1 by the LED head portion 2, and at the same time, the electrostatic latent image is formed under a developing bias provided between the latent image portion potential and the non-latent image portion potential. The toner electrostatically adheres only to the electrostatic latent image portion, and the electrostatic latent image is developed by the toner (reversal development).

Electrostatic latent image forming body 1 on which a toner image is formed
Is continuously rotated, and is transferred by the transfer roller 4 onto the sheet as the image forming medium supplied at a timing of the sheet feeding system at the transfer position.

The transfer roller 4 is composed of an elastic resistance roller, and applies an electric field to pull the toner image on the electrostatic latent image forming body 1. This transfer roller 4 has a power source 1
2, a predetermined voltage is applied.

The paper feeding system comprises a pickup roller 6a, a feed roller 6b and a registration roller 6c. The paper picked up from the paper feed cassette 8 by the pickup roller 6a is conveyed to the registration roller 6c by the feed roller 6b, and the registration roller 6c corrects the posture of the paper and then sends it to the transfer position.

The toner image in contact with the paper at the transfer position is separated from the electrostatic latent image forming body 1 by the transfer roller 4 and transferred onto the paper. As a result, a toner image based on the image data is formed on the paper.

Since the sheet on which the toner image is transferred adheres to the surface of the electrostatic latent image forming body 1 due to static electricity, it is peeled off from the surface of the electrostatic latent image forming body 1 by a peeling means (not shown), and a fixing device is provided. It is sent to 9. The fixing device 9 is composed of a heat roller having a heater incorporated therein, and heats a toner image only on the sheet by an electric charge to melt the toner and permanently fix the toner on the sheet. The paper on which the fixing is completed is carried out to the paper discharge tray 11 by the sending roller 10.

On the other hand, the electrostatic latent image forming body 1 which has passed through the transfer position is rotationally driven as it is, the residual toner and paper dust are cleaned by the cleaner 5, and the light source 7 is used as necessary.
The surface is discharged by exposing from both sides. Then, if necessary, a series of processes from scanning exposure by the document scanning unit is started again.

Next, the electrostatic latent image forming body 1 will be described with reference to FIGS. 2 and 3. 2 schematically shows a part of the electrostatic latent image forming body 1, and FIG. 3 shows the photoelectric conversion body 21.
FIG. That is, the electrostatic latent image forming body 1 is provided with the photoelectric conversion bodies 21, ... Corresponding to predetermined pixels one-to-one in a two-dimensional manner.

In each of the photoelectric conversion bodies 21, a transparent electrode 31 is provided on a transparent insulating substrate 30, and a light-shielding electrode 32 is provided while leaving an opening between the transparent electrode 31 and the transparent electrode 31. A light-shielding or light-transmitting insulating layer 33 is provided so as to project from the light-shielding electrode 32 to the opening, and a photoconductive layer 34 is laminated so as to extend over the light-transmitting electrode 31, the light-shielding electrode 32, and the insulating layer 33.
A conductive light shield 36 is formed on the photoconductive layer 34 so as to face the transparent electrode 31, and the conductive light shield 36 and the photoconductive layer 3 are formed.
4 and a transparent pixel electrode 35 provided in the shape of an island in a one-to-one correspondence with a predetermined pixel.

The power supply 37 is connected to the transparent electrode 31, and the light-shielding electrode 32 is grounded. The light-transmitting electrode 31, the photoconductive layer 34, the conductive light shield 36, and the light-transmitting pixel electrode 35 form a first functional portion 38, and the light-shielding electrode 32, the photoconductive layer 34, and the light-transmitting pixel electrode 35. Thus, the second functional portion 39 is formed.

In the photoelectric conversion body 21 of this embodiment, two functional portions 38 and 39 having the structure of an electrode, a photoconductive layer and an electrode perform both a capacitor element function and a photoconductive element function depending on the incident direction of light. be able to. That is, when the light receiving surface of the incident light is the translucent insulating substrate 30, the first functional unit 38 has a photoconductive element function and the second functional unit 39 has a capacitor element function. When the light receiving surface of the incident light is the translucent pixel electrode 35, the first functional unit 38 has a capacitor element function and the second functional unit 39 has a photoconductive element function.

Since the photoelectric conversion body 21 provided in the electrostatic latent image forming body 1 of this embodiment is exposed through the transparent insulating substrate 30, the first functional portion including the transparent electrode 31 is formed. 38
Has a photoconductive element function and includes a light-shielding electrode 32.
The functional unit 39 of FIG. The insulating layer 33 is a photoconductive layer 34 which is made conductive by light incident through the opening between the transparent electrode 31 and the light shielding electrode 32.
And the light-shielding electrode 32 are electrically isolated. The photoelectric conversion body 21 is manufactured as follows.

That is, an ITO (indium tin oxide) film having a thickness of 2 μm is provided on a cleaned glass substrate (Corning 705), and photoetching (PEP) is performed by a conventional method.
Thus, the translucent electrode 31 is formed with an electrode width of 30 μm and an electrode pitch of 125 μm (in the paper surface direction of the cross section shown in FIG. 3). One ends of the transparent electrodes 31 are commonly connected,
An external terminal connection portion (not shown) for connecting to the power supply 37 is formed.

Further, a 2 μm chromium thin film is provided by vapor deposition, and the light-shielding electrodes 32 are formed by a conventional PEP with an electrode width of 30 μm and an electrode pitch of 125 μm (in the direction of the paper surface of the cross section shown in FIG. 3). One ends of the light-shielding electrodes 32 are commonly connected, and an external terminal connecting portion (not shown) for grounding is formed.

Next, an SiO ₂ (silicon oxide) film having a thickness of 1 μm is provided between the light-transmitting electrode 31 and the light-shielding electrode 32 so as to cover one end of the light-shielding electrode 32, and an insulating layer 33 is formed. The opening between the transparent electrode 31 and the insulating layer 33 is formed to have a thickness of 40 μm.

An amorphous silicon film having a thickness of 20 μm is provided on the transparent electrode 31, the light-shielding electrode 32, and the insulating layer 33 by plasma CVD (chemical vapor deposition), and the transparent electrode 31 and the light-shielding electrode are formed by photoetching. The photoconductive layer 34 is formed by patterning in a band shape intersecting 32. Next, a chromium thin film having a thickness of 1 μm is provided by vapor deposition, and a conductive light shield 36 is formed so as to overlap with the translucent electrode 31 via the photoconductive layer 34.

2 on the conductive light shield 36 and the photoconductive layer 34.
An ITO film having a thickness of μm is provided, and the photoconductive layer 34 and the transparent electrode 3 are provided.
The transparent pixel electrode 35 is two-dimensionally formed by patterning an independent rectangle of 100 μm square at a pitch of 125 μm so as to include the intersecting portion 1 and the conductive light shield 36. The transparent electrode 31 is connected to the power supply 37 via an external connection terminal, and the light-shielding electrode 32 is grounded via an external connection terminal.

Next, the operation of the photoelectric conversion body 21 when the first functional portion 38 is used as a photoconductive element functional portion and the second functional portion 39 is used as a capacitor element functional portion will be described. FIG. 4 shows an equivalent circuit of the photoelectric conversion body 21 shown in FIG. The photoconductive element (first functional section) 38 and the capacitor element (second functional section) 39 are connected in series, and when a voltage V ₀ is applied from both ends to the photoconductive element 3
The potential V _OUT between 8 and the capacitor element 39 appears on the translucent pixel electrode 35. This potential changes according to the exposure image,
Form an electrostatic latent image.

In the initial state, the capacitor element 39 is not charged and V _OUT is 0V. In the dark, the voltage V ₀ is first supplied from the power supply 37 to the photoconductive element 38 and the capacitor element 39. Since it is in the dark, the photoconductive element 38
Also acts as a capacitor, and the applied voltage is the photoconductive element 38.
The capacitor element 39 and the photoconductive layer 34 sandwiched between the transparent electrode 31 and the light shielding electrode 32 are distributed in accordance with the respective capacitance ratios.

However, in this embodiment, the transparent electrode 31
Since the length of the opening between the insulating layer 33 and the insulating layer 33 is larger than the thickness of the photoconductive layer 34, most of the applied voltage is distributed to the photoconductive element 38 and the capacitor element 39. The larger the ratio between the length of the opening and the thickness of the photoconductive layer, the greater the proportion of the applied voltage distributed to the photoconductive element 39 and the capacitor element 38. It is more preferable that this ratio is 1 or more and 2 or more.

When light is incident from the back surface of the translucent insulating substrate 30, the light is not incident on the photoconductive layer 34 of the capacitor element 39 due to the function of the light shielding electrode 32.
Light is incident on the photoconductive layer 34 of No. 8 through the transparent electrode 31. Then, the photoconductive layer 34 of the photoconductive element 38 is rendered conductive, and the voltage output to V _OUT as shown in FIG. 5 is a value V ₂ close to the voltage V ₀ applied from the power source 37 from the voltage V ₁ before light incidence. Rise to. The rising time constant at this time mainly depends on the time constants of the photoconductive layer 34 and the capacitor element 39. When no light is incident, the voltage (V _OUT ) appearing on the translucent pixel electrode 35 is V ₁ .

Therefore, the contrast potential Vc = V ₂ −V ₁ can be obtained depending on the presence or absence of light incident. Since V ₀ is applied after the light incidence is completed, the potential of V _OUT returns to V ₁ . Further, after the voltage application from the power source 37 is stopped, the potential of the translucent pixel electrode 35 can be set to approximately 0 V (static elimination) by exposing from both sides of the translucent insulating substrate 30. In this way, the photoelectric converter 21 can convert an optical image into an electrostatic latent image.

Further, since the voltage V ₀ is also applied after the light incident has ended, the discharge of charge stored in the capacitor element 39 of the exposed portion becomes slower, slowly from V ₂ as shown in FIG. 5 To descend. Therefore, the potential contrast between the exposed portion and the non-exposed portion is maintained even after the exposure is completed.

It is also possible to control the contrast potential by controlling the energy of the light incident on the photoconductive element 38. It is well known that the degree of conduction of the photoconductive element 38 varies depending on the energy of incident light. In the above description, the case where the photoconductive element 38 is almost completely turned on and the voltage applied from the power source 37 is applied to the capacitor element 39 without substantially decreasing has been described.

When the energy of the incident light on the photoconductive element 38 is controlled and the voltage drop in this element is limited, the voltage applied to the capacitor element 39 is the power supply voltage V ₀ and the photoconductive element 3.
8 and a voltage V ₃ (FIG. 5) lower than that in the previous case appears at V _OUT . Thus, in this photoelectric conversion body 21, the electrostatic latent image potential can be changed according to the energy amount of the incident light.

Therefore, in the electrostatic latent image forming body 1 in which the photoelectric conversion body 21 is two-dimensionally arranged, the voltage V ₂ is applied to the translucent pixel electrode 35 corresponding to the pixel depending on whether light enters the photoelectric conversion body 21. The voltage V ₁ appears, and an electrostatic latent image with a voltage contrast Vc (= V ₂ −V ₁ ) is formed on the electrostatic latent image forming body 1 by exposure according to image information.

Further, in this electrostatic latent image forming body 1, even if the spot size of the light for inputting the optical image changes, the entire transparent pixel electrode 35 of the photoelectric conversion body 21 provided corresponding to the pixel is formed. Since a uniform electric potential is generated, a uniform electric potential is generated in the size of the pixel, and the positional relationship between the pixels is fixed, so that it is possible to form pixels with no pitch irregularity in both main scanning and sub scanning.

In the image forming apparatus using this electrostatic latent image forming body 1, development is performed while the photoelectric conversion body 21 of the electrostatic latent image forming body 1 is being image-exposed. It is also possible to apply an electrostatic latent image voltage to the photoelectric conversion body group that supports the image exposure and simultaneous development processes, and to apply the transfer voltage simultaneously to the photoelectric conversion body group that supports the transfer process. Is.

As described above, by using the electrostatic latent image forming body which converts a light image into an electrostatic latent image without supplying electric charges from the outside by a corona charger or the like, chargeless electrons without ozone generation are used. It is designed to realize the photographic process.

As a result, an optical image-electrostatic latent image conversion can be performed without precharge accompanied by ozone generation, a chargeless electrophotographic process can be realized, and a chargeless electrophotographic process capable of gradation recording can be realized. it can.

[0046]

As described in detail above, according to the present invention,
It is possible to provide an image forming apparatus that can use an electrophotographic process as a recording process that does not use a corona charger that generates ozone.

[Brief description of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a copying machine according to an embodiment of the present invention.

FIG. 2 is a perspective view schematically showing the electrostatic latent image forming body of FIG.

FIG. 3 is a sectional view schematically showing the photoelectric conversion body of FIG.

FIG. 4 is a diagram showing an equivalent circuit of the photoelectric conversion body of FIG.

FIG. 5 is a diagram for explaining an operating state of the photoelectric conversion body in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrostatic latent image forming body, 2 ... LED head part, 3 ... Developing device, 4 ... Transfer roller, 5 ... Cleaner, 8 ... Paper feed cassette, 9 ... Fixing device, 21 ... Photoelectric conversion body, 30 ... Translucent Insulating substrate, 31 ... Translucent electrode, 32 ... Shading electrode, 33 ... Insulating layer, 34 ... Photoconductive layer, 35 ... Translucent pixel electrode, 36 ...
Conductive light shield, 37 ... Power supply, 38 ... First functional unit, 39
… Second functional part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Fujiwara 70 Yanagimachi, Saiwai-ku, Kawasaki-shi, Kanagawa Toshiba Yanagimachi factory

Claims (4)

[Claims] 1. A transparent insulating substrate, a first transparent electrode provided on one surface of the transparent insulating substrate, and a first transparent electrode.
A first light-shielding electrode provided between the light-transmitting electrode and the light-transmitting electrode, and a light-shielding insulating layer provided so as to project from the first light-shielding electrode into the opening; The first light-transmissive electrode, the first light-shielding electrode, and the photoconductor laminated over the insulating layer, the first light-transmitting electrode, and the first light-shielding electrode are opposed to each other. An island-shaped electrode having a first functional electrode section and a second functional electrode section provided as a first function electrode section, and a first function between the first functional electrode section and the first light-shielding electrode. And a plurality of photoelectric conversion bodies each having a second functional portion formed between the second functional electrode portion and the first translucent electrode are arranged in a two-dimensional manner corresponding to a pixel. And an electrostatic latent image forming body for forming an electrostatic latent image corresponding to the incident exposure image, and a predetermined potential is generated for all of the island electrodes. Means for making light incident on the photoelectric conversion body from the other surface of the translucent insulating substrate according to image information, and selectively changing the potential of the island-shaped electrode according to this exposure. An exposing unit for forming an electrostatic latent image; a developing unit for developing the electrostatic latent image formed by the exposing unit with a developer to form a developer image; and a developing unit image formed by the developing unit. An image forming apparatus comprising: a transfer unit that transfers the image to a medium to be imaged; and a fixing unit that fixes the developer image transferred by the transfer unit to the medium to be imaged. 2. A transparent insulating substrate, a first transparent electrode provided on one surface of the transparent insulating substrate, and the first transparent electrode.
A first light-shielding electrode provided between the light-transmitting electrode and the light-transmitting electrode, and a light-shielding insulating layer provided so as to project from the first light-shielding electrode into the opening; A first phototransmissive electrode, a first light-shielding electrode, and a photoconductor laminated over the insulating layer; and a photoconductor formed on the photoconductor facing the first light-transmissive electrode. Second light-shielding electrode, the first light-shielding electrode, and a first functioning electrode portion provided to face the insulating layer, and a second functioning electrode formed on the second light-shielding electrode. A light-transmitting island-shaped electrode having a portion, a first functional portion is formed between the first functional electrode portion and the first light-shielding electrode, and the second functional electrode portion is provided. A second functional portion is formed between the first translucent electrode and the incident light receiving surface is on the translucent insulating substrate side or the translucent island electrode side. One of the first functional portion and the second functional portion serves as a photoconductive functional portion and the other serves as a capacitor functional portion, and a predetermined potential is generated in an island electrode connecting the photoconductive functional portion and the capacitor functional portion, A photoelectric conversion body, wherein a potential of a translucent island electrode connected to the capacitor function section is made variable by light incident on the photoconductive function section. 3. The photoelectric conversion body according to claim 2, wherein an opening between the first transparent electrode and the insulating layer is larger than a thickness of the photoconductor. 4. A transparent insulating substrate, a first transparent electrode provided on one surface of the transparent insulating substrate, and the first transparent electrode.
A first light-shielding electrode provided between the light-transmitting electrode and the light-transmitting electrode, and a light-shielding insulating layer provided so as to project from the first light-shielding electrode into the opening; A first phototransmissive electrode, a first light-shielding electrode, and a photoconductor laminated over the insulating layer; and a photoconductor formed on the photoconductor facing the first light-transmissive electrode. Second light-shielding electrode, the first light-shielding electrode, and a first functioning electrode portion provided to face the insulating layer, and a second functioning electrode formed on the second light-shielding electrode. A light-transmitting island-shaped electrode having a portion, a first functional portion is formed between the first functional electrode portion and the first light-shielding electrode, and the second functional electrode portion is provided. A second functional portion is formed between the first translucent electrode and the incident light receiving surface is on the translucent insulating substrate side or the translucent island electrode side. A plurality of photoelectric converters, one of which is a photoconductive function portion and the other of which is a capacitor function portion, are two-dimensionally arranged corresponding to pixels, and the first transparent electrode is provided. And the first light-shielding electrode are commonly connected to the first common electrode and the second common electrode, respectively, and a predetermined voltage is applied between the first and second common electrodes to transmit the light-transmitting island. A predetermined potential is generated in the electrode group, and a photoconductive function group and a capacitor function group are formed depending on whether the light receiving surface of the incident light is the transparent insulating substrate side or the transparent island electrode side. An electrostatic latent image forming body, wherein potential contrast is generated in a translucent island-shaped electrode group connected to a capacitor function group according to the amount of light incident on the photoconductive function group.