JPH08156261A - Image forming device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an image forming apparatus capable of realizing a low apparatus cost. [Structure] Pyroelectric dielectric 2 arranged at the ink outlet
1 is given a thermal stimulus to change the spontaneous polarization to change the potential of the ink, and by superimposing it on the electric field formed by the counter electrode 29 arranged on the back surface of the recording paper 10, the ink is ejected by electrostatic attraction. Then, recording is performed on the recording paper 10. [Effect] By controlling the spontaneous polarization of the pyroelectric dielectric by thermal stimulation, the withdrawal of toner and ink onto the recording paper is controlled, so it is possible to record with a low printing control voltage, and an inexpensive driver is used. The image forming apparatus can be realized.

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 applicable to a printer, a copying machine, a facsimile or the like which utilizes an electrostatic latent image and an electrostatic phenomenon such as electrostatic attraction.

[0002]

2. Description of the Related Art Conventionally, electrophotography, which combines the phenomenon of static electricity and the phenomenon of photoconductivity, has made up a large portion of the current hard copy industry including copiers and optical printers.

FIG. 10 is a conceptual diagram of a conventional electrophotographic system. In FIG. 10, (1) 1 cm from the surface of the photoconductor 1
Corona discharge generated by applying a high voltage of 6 to 7 kV to the corona charger 2 arranged at a distance from each other gives an electrostatic charge to the surface of the photoreceptor 1. (2) Using the optical system 9, a light beam emitted from a light source typified by a laser or the like,
Image exposure of the surface of the photoconductor 1 is performed, and the electric charge in the exposed portion disappears due to a photoconductive phenomenon, and an electrostatic latent image is generated. (3) By applying the charged toner onto the photoconductor 1 by the toner supply device 3, the toner image is generated by being attracted by the electric field of the electrostatic latent image. (4) The toner image obtained by the development is subjected to corona discharge by the corona transfer device 4 arranged on the back surface of the recording paper 10 superposed on the toner image, and electrostatic charge having a polarity opposite to that of the toner is applied to the back surface of the recording paper 10. The toner is transferred onto the recording paper 10 by the electrostatic attraction force. (5) The untransferred toner and the remaining electrostatic latent image on the photoconductor 1 are removed by the cleaner 5 and the static eliminator 6 to prepare for the next image recording. (6) The toner image on the recording paper 10 is run through the fixing device 7, melted by momentary heat and pressure, and the image is recorded by adhering to the fibers of the recording paper 10 to fix the image.

An ion flow system is a system that does not use the photoreceptor 1 to form an electrostatic latent image. Next, the principle of the conventional ion flow system will be described. FIG. 11 is a conceptual diagram of a conventional ion flow system. (1) The ions generated in the corona charger 11 have an electrostatic attraction force due to the electric field formed by the counter electrode 13 arranged to face the corona charger 11 on the back surface of the dielectric 12 forming the electrostatic latent image. It acts and passes through the ion control hole arranged between the corona charger 11 and the dielectric 12. (2) The passing amount is controlled by an electric field formed by the upper control electrode 14 arranged above the ion control hole and the lower control electrode 15 arranged below.
An electrostatic latent image is directly formed on the dielectric 12. (3) By applying the charged toner on the dielectric 12 by the toner supply device 3, the toner image is generated by being attracted by the electric field of the electrostatic latent image. (4) The toner image obtained by development is subjected to corona discharge by the corona transfer device 4 arranged on the back surface of the recording paper 10 superposed on the toner image, and electrostatic charge having a polarity opposite to that of the toner is applied to the back surface of the recording paper 10. The toner is transferred onto the recording paper 10 by the electrostatic attraction force. (5) The untransferred toner and the remaining electrostatic latent image on the dielectric 12 are removed by the cleaner 5 and the static eliminator 6 to prepare for the next image recording. (6) The toner image on the recording paper 10 is run by the fixing device 7, melted by momentary heat and pressure, and is adhered to the fibers of the recording paper 10 to fix the image, thereby performing image recording. It is configured.

On the other hand, as a method of not forming an electrostatic latent image,
There is a direct toner spraying method in which toner is directly transferred to the recording paper 10 by electrostatic attraction. Next, the principle of the conventional toner direct spraying method will be described. FIG. 12 is a conceptual diagram of a conventional toner direct spraying method. (1) The toner negatively charged by the toner supply device 3 is attracted and carried by the developer sleeve 16 having a cylindrical metal shape by electrostatic attraction. (2) Developer sleeve 16 carrying toner
Is rotated to transfer the toner to a position facing the recording paper 10. (3) At this time, a high voltage of about 1.5 kV is applied to the counter electrode 13 arranged on the back surface of the recording paper 10. Therefore, the electrostatic attraction force acts on the toner that has approached the counter electrode 13. (4) Further, the ring electrode 17 having a toner passage hole disposed between the toner and the recording paper 10 has about 3
By superposing the electric field formed by applying a voltage of 00V on the electric field by the counter electrode 13, the electrostatic attraction force larger than the carrying force on the developer sleeve 16 causes the toner to pass through the toner passage hole. Image recording is performed by spraying the recording paper 10.

As a method other than the above-mentioned direct toner spraying method, which does not form an electrostatic latent image, there is an electrostatic suction type ink jet method. FIG. 13 is a conceptual diagram of a conventional electrostatic suction type inkjet system. (1) Ink ejection nozzles 19 are arranged so as to face a metal drum 18 serving as a counter electrode on which the recording paper 10 is mounted. (2) An image is recorded by ejecting ink by superimposing a signal voltage of several thousand V on the bias voltage between the metal drum 18 and the nozzle 19.

[0007]

However, the above-mentioned prior art has the following problems.
(1) In the electrophotographic method, a large number of parts such as a light source for writing, an optical part, and a photosensitive drum are used to form an electrostatic latent image, and the structure is complicated. There is a problem that running costs are high because consumables such as drums are also replaced at the same time. (2) The ion flow method was devised as a method that does not use an expensive optical system, but since a high voltage of up to about 300 V is switched to control electrostatic latent image recording, the driver cost for controlling it is high. There is a problem that the cost becomes high and the device cost cannot be reduced as a result.
(3) In order to further simplify the structure, a toner direct spraying method was devised in which the toner is directly sprayed onto the recording paper without forming an electrostatic latent image. The problem remains that a high voltage is needed to control the toner withdrawal. (4)
Further, the electrostatic suction type inkjet system also has the same problem as (3).

As described above, in the conventional image forming apparatus utilizing the electrostatic phenomenon of the electrostatic latent image and the electrostatic attraction force, a high voltage is used for printing control even if the structure is simplified and the apparatus cost is reduced. Since the switching is performed, the driver cost for controlling the switching becomes high, and as a result, the device cost cannot be reduced.

Therefore, an object of the present invention is to provide an image forming apparatus capable of reducing the apparatus cost.

[0010]

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art.
As the first means, a dielectric having pyroelectricity is used, and the dielectric is provided with a heating means. By changing the spontaneous polarization of the pyroelectric dielectric by the heating means, the heating means It is possible to control a high potential by controlling the low voltage. As the second means, instead of the heating means of the first means, a pyroelectric dielectric is used by an optical signal represented by a solid-state light emitting element array such as a laser beam scanning or LED array / fluorescent tube element array / plasma array. It is designed to give thermal stimulation to the body.

[0011]

According to the present invention, since a high print control voltage is not required to control the drawing of the toner and the ink to the recording paper, an inexpensive driver can be used and the device cost can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an electrostatic inkjet printer according to a first embodiment of the present invention. In the figure, 21 is, for example, PVDF (polyvinylidene fluoride) or P (VDF
It is a pyroelectric dielectric such as TrFE) (a copolymer of vinylidene fluoride and ethylene trifluoride). Reference numeral 22 denotes a heating resistor arranged in contact with the pyroelectric dielectric 21 to apply a thermal stimulus. Reference numeral 23 is a lead for supplying a current to the heating resistor 22. 24 is an insulator 25 on the back surface of the pyroelectric dielectric 21.
It is a nozzle side electrode which is disposed via the electrode and is grounded. 26
Is an ink nozzle hole formed by penetrating the pyroelectric dielectric 21, the heat generating resistor 22, the insulator 25, and the nozzle side electrode 24, which are laminated in the vicinity of the heat generating resistor 22.
Reference numeral 27 is an ink tank, 28 is an ink meniscus, 29 is a counter electrode which is arranged so as to face the ink nozzle hole 26, and a high voltage of about 1.5 kV is applied. 10 is a recording paper which moves on the surface of the counter electrode 29. is there.

Next, the printing operation will be described. (1) The ink contained in the ink tank 27 is supplied to the tip of the ink nozzle hole 26 due to the back pressure of the ink and the capillary phenomenon. (2) The ink is recorded on the recording paper 1 by the uniform electric field formed by the nozzle side electrode 24 and the counter electrode 29.
The ink meniscus 28 is formed by being drawn to the 0 side.
(3) When printing, the heating resistor 22 is connected to the lead 23.
Heat is generated by supplying a current to the ink nozzle hole 26.
The pyroelectric dielectric material 21 close to is heated to about 80 ° C.
(4) Due to the heating, the spontaneous polarization of the pyroelectric dielectric 21 adjacent to the ink nozzle hole 26 changes, and the surface potential is generated. (5) The ink is the opposite electrode 29 to the nozzle side electrode 24.
The uniform electric field formed by the electric field and the electric field generated by superimposing the surface potential generated on the pyroelectric dielectric 21 close to the ink nozzle hole 26 fly to the recording paper 10 side and adhere to the recording paper 10 to be dried, so that an image can be recorded. Becomes

Next, a second embodiment of the present invention will be described. FIG. 2 is a configuration diagram of an electrostatic inkjet printer according to a second embodiment of the present invention. The second embodiment is characterized in that the pyroelectric dielectric 21, the heating resistor 22 and the leads 23 of the first embodiment are arranged on the surface of the counter electrode 29, and the same effect as the first embodiment can be obtained. It is a thing. In each embodiment described below, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Next, the printing operation will be described. (1) The ink contained in the ink tank 27 is supplied to the tip of the ink nozzle hole 26 due to the back pressure of the ink and the capillary phenomenon. (2) The ink is recorded on the recording paper 1 by the uniform electric field formed by the nozzle side electrode 24 and the counter electrode 29.
The ink meniscus 28 is formed by being drawn to the 0 side.
(3) When printing, the heating resistor 22 is connected to the lead 23.
Is heated to heat the pyroelectric dielectric 21 to about 80 ° C. (4) By heating, the spontaneous polarization of the pyroelectric dielectric 21 facing the ink nozzle hole 26 changes, and a surface potential is generated. (5) Ink is on the nozzle side electrode 2
4 and the counter electrode 29 and a uniform electric field formed by the electric field superposed on the surface of the pyroelectric dielectric 21 facing the ink nozzle hole 26, the electric field flies toward the recording paper 10 and is attached to the recording paper 10 to be dried. Image recording becomes possible.

Next, a third embodiment of the present invention will be described. FIG. 3 is a configuration diagram of an electrostatic inkjet printer according to a third embodiment of the present invention. In FIG. 3, reference numeral 32 denotes a back electrode which is arranged on the back surface of the pyroelectric dielectric 21 and to which a high voltage of about 1.5 kV is applied.

Next, the printing operation will be described. (1) The ink contained in the ink tank 27 is supplied to the tip of the ink nozzle hole 26 due to the back pressure of the ink and the capillary phenomenon. (2) Ink is recorded on the recording paper 1 by the uniform electric field formed by the nozzle side electrode 24 and the back electrode 32.
The ink meniscus 28 is formed by being drawn to the 0 side.
(3) When printing, the heating resistor 22 is connected to the lead 23.
Is heated to heat the pyroelectric dielectric 21 to about 80 ° C. (4) Due to the heating, the spontaneous polarization of the pyroelectric dielectric 21 close to the ink nozzle hole 26 changes, and a surface potential is generated. (5) Ink is on the nozzle side electrode 2
4 and the back electrode 32 and a uniform electric field formed by the surface electric potential generated in the pyroelectric dielectric 21 close to the ink nozzle hole 26 fly to the recording paper 10 side and adhere to the recording paper 10 to be dried. Image recording becomes possible.

Next, a fourth embodiment of the present invention will be described. FIG. 4 is a configuration diagram of an electrostatic ink jet printer according to a fourth embodiment of the present invention. The fourth embodiment is characterized in that the back electrode 32 shown in the third embodiment is arranged behind the pyroelectric dielectric material 21 with ink interposed therebetween, and the same effect as that of the third embodiment can be obtained. Is. That is, 32 is disposed behind the pyroelectric dielectric material 21 via ink, and is approximately 1.5 kV.
Is a back electrode to which a high voltage of is applied.

Next, the printing operation will be described. (1) The ink contained in the ink tank 27 is supplied to the tip of the ink nozzle hole 26 due to the back pressure of the ink and the capillary phenomenon. (2) Ink is recorded on the recording paper 1 by the uniform electric field formed by the nozzle side electrode 24 and the back electrode 32.
The ink meniscus 28 is formed by being drawn to the 0 side.
(3) When printing, the heating resistor 22 is connected to the lead 23.
Is heated to heat the pyroelectric dielectric 21 to about 80 ° C. (4) Due to the heating, the spontaneous polarization of the pyroelectric dielectric 21 close to the ink nozzle hole 26 changes, and a surface potential is generated. (5) Ink is on the nozzle side electrode 2
4 and the back electrode 32 and a uniform electric field formed by the surface electric potential generated in the pyroelectric dielectric 21 close to the ink nozzle hole 26 fly to the recording paper 10 side and adhere to the recording paper 10 to be dried. Image recording becomes possible.

Next, an embodiment of the toner direct spraying method of the present invention will be described. FIG. 5 is a block diagram of the toner direct spraying method of the fifth embodiment of the present invention. In the figure,
42 is a toner box, 41 is a developer sleeve carrying toner, to which a high voltage of about 1.5 kV is applied. A toner 43 is formed at a position where the developer sleeve 41 is closest to the recording paper 10, and is formed near the heat generating resistor 22 and penetrates the pyroelectric dielectric 21 and the heat generating resistor 22 having a laminated structure. It is a passage hole. 7 is a fixing device.

Next, the printing operation will be described. (1) Toner that is negatively charged in the toner box 42 is attracted to and carried by the developer sleeve 41 having a cylindrical metal shape by electrostatic attraction. (2) Developer carrying toner
The sleeve 41 is rotated to transfer the toner to the position where the toner is closest to the recording paper 10. (3) At this time, the counter electrode 29 and the developer sleeve 4 arranged on the back surface of the recording paper 10
An electrostatic attraction force acts on the toner on the recording paper 10 side by the uniform electric field formed by 1. (4) When printing, heat is generated by supplying an electric current to the heat generating resistor 22 arranged in the vicinity of the toner passage hole 43 arranged between the developer sleeve 41 and the recording paper 10 to pass the toner. The pyroelectric dielectric 21 adjacent to the hole 43 is heated to about 80 ° C. (5) The heating changes the spontaneous polarization of the pyroelectric dielectric 21 to generate a surface potential. (6) Toner is the counter electrode 2
9 and the developer sleeve 41, and a uniform electric field formed by the developer sleeve 41 and a surface electric field generated on the pyroelectric dielectric 41 close to the toner passage hole 43 are superimposed on each other to fly to the recording paper 10 side and adhere to the recording paper 10. . (7) An image can be recorded by running the fixing device 7 on the recording paper 10 to melt the toner image by instantaneous heat and pressure, and adhering it to the fibers of the recording paper 10 to fix the image. .

Next, a sixth embodiment of the present invention will be described. FIG. 6 is a configuration diagram of a toner direct spraying system according to a sixth embodiment of the present invention. This embodiment is characterized in that the pyroelectric dielectric 21, the heating resistor 22 and the lead 23 shown in the fifth embodiment are arranged on the surface of the counter electrode 29, and the same effect as the fifth embodiment can be obtained. Is.

Next, the printing operation will be described. (1) Toner that is negatively charged in the toner box 42 is attracted to and carried by the developer sleeve 41 having a cylindrical metal shape by electrostatic attraction. (2) Developer carrying toner
The sleeve 41 is rotated to transfer the toner to the position where the toner is closest to the recording paper 10. (3) At this time, the counter electrode 29 and the developer sleeve 4 arranged on the back surface of the recording paper 10
An electrostatic attraction force acts on the toner on the recording paper 10 side by the uniform electric field formed by 1. (4) When printing, the heating resistor 22 is laminated on the surface of the counter electrode 29.
Is heated by supplying an electric current to the pyroelectric dielectric 2 at the position where the developer sleeve 41 comes closest to the recording paper 10.
Heat 1 to about 80 ° C. (5) The heating changes the spontaneous polarization of the pyroelectric dielectric 21 to generate a surface potential.
(6) The toner is the counter electrode 29 and the developer sleeve 4.
The uniform electric field formed by 1 and the electric field generated by superposing the surface potential generated on the pyroelectric dielectric material 21 fly to the recording paper 10 side and adhere to the recording paper 10. (7) An image can be recorded by running the toner image on the recording paper 10 through the fixing device 7, melting momentary heat by pressure, and adhering to the fibers of the recording paper to fix the image.

Next, an embodiment of the ion flow system of the present invention will be described. FIG. 7 is a configuration diagram of an electrostatic latent image forming head of a seventh embodiment of the present invention. In the figure, reference numeral 45 is a corona charger, and 46 is a grid-shaped ion outlet electrode arranged at the ion outlet of the corona charger 45 and applied with a high voltage of about 1.5 kV. Reference numeral 29 is a counter electrode that is arranged to face the corona charger 45 and is grounded.
Reference numeral 48 is a dielectric that moves on the surface of the counter electrode 29 and forms an electrostatic latent image. The pyroelectric dielectric 21 is arranged between the ion outlet electrode 46 and the dielectric 48. Reference numeral 47 denotes an ion passage hole formed in the vicinity of the heat generating resistor 22 and penetrating the pyroelectric dielectric 21 and the heat generating resistor 22 having a laminated structure.

Next, the electrostatic latent image forming operation will be described.
(1) The ions generated by the corona charger 45 have an electrostatic attraction force on the dielectric 48 side due to the uniform electric field formed by the ion outlet electrode 46 and the counter electrode 29.
(2) When an electrostatic latent image is formed, heat is generated by supplying a current to the heating resistor 22 arranged near the ion passage hole 47, and the pyroelectric dielectric 21 is heated to about 80 ° C. To do.
(5) The heating changes the spontaneous polarization of the pyroelectric dielectric 21 to generate a surface potential. (6) The ions pass through the ion passage hole 47 by an electric field in which a uniform electric field formed by the ion outlet electrode 46 and the counter electrode 29 and a surface potential generated on the pyroelectric dielectric 21 adjacent to the ion passage hole 47 are superposed. It flies to the dielectric 48 through and electrostatic latent image formation is performed. After that, image recording becomes possible in accordance with the conventional procedure of the ion flow method.

Next, an embodiment of the ion flow system will be described. FIG. 8 is a configuration diagram of an ion flow type electrostatic latent image forming head of an eighth embodiment of the present invention. In this embodiment,
Pyroelectric dielectric 21 and heating resistor 2 shown in the seventh embodiment
2. The lead 23 is arranged on the surface of the counter electrode 29, and the same effect as that of the seventh embodiment can be obtained.

Next, the electrostatic latent image forming operation will be described.
(1) The ions generated by the corona charger 45 have an electrostatic attraction force on the dielectric 48 side due to the uniform electric field formed by the ion outlet electrode 46 and the counter electrode 29.
(2) When an electrostatic latent image is formed, the heating resistor 22 laminated on the surface of the counter electrode is heated to generate heat, and the pyroelectric dielectric 21 is heated to about 80 ° C. (5) The heating changes the spontaneous polarization of the pyroelectric dielectric 21 to generate a surface potential. (6) Ion is the ion outlet electrode 4
An electrostatic latent image is formed by flying to the dielectric 48 by an electric field that superimposes the surface potential generated on the pyroelectric dielectric 21 laminated on the surface of the uniform electrode formed by 6 and the counter electrode 29. After that, image recording becomes possible in accordance with the conventional procedure of the ion flow method.

Next, an embodiment will be described in which a solid-state light emitting element array such as a laser beam scanning or LED array / fluorescent tube element array / plasma array is used instead of the above heating means. FIG. 9 is a block diagram of an electrostatic ink jet printer according to a ninth embodiment of the present invention. 49 is pyroelectric dielectric 2
1 is an LED array placed in contact opposite the ink nozzle holes 26 for applying thermal stimulation to the light source 1.
The other configuration is the same as that of the embodiment shown in FIG.

Next, the printing operation will be described. (1) The ink contained in the ink tank 27 is supplied to the tip of the ink nozzle hole 26 due to the back pressure of the ink and the capillary phenomenon. (2) The ink is recorded on the recording paper 1 by the uniform electric field formed by the nozzle side electrode 24 and the counter electrode 29.
The ink meniscus 28 is formed by being drawn to the 0 side.
(3) At the time of printing, the pyroelectric dielectric 21 is irradiated with light rays by the LED array 49 arranged on the back surface of the pyroelectric dielectric 21, thereby giving thermal stimulation to the pyroelectric dielectric 21. The body 21 is heated to about 80 ° C. (4) By heating, the spontaneous polarization of the pyroelectric dielectric 21 facing the ink nozzle hole 26 changes, and a surface potential is generated. (5) The ink flies to the recording paper 10 side by the electric field in which the uniform electric field formed by the nozzle side electrode 24 and the counter electrode 29 and the surface potential generated in the pyroelectric dielectric 21 facing the ink nozzle hole 26 are superposed. Then, the image is recorded on the recording paper 10 by being dried.

The pyroelectric dielectric material used in the above description can be prepared by several methods. One is the organic material PVDF and P (VDF / TrFE), as already explained.
And the like. Other manufacturing methods include a method of forming a film of a dielectric with a vacuum device, a method of coating fine particles of the dielectric dispersed in a solvent on a substrate material, and the like. In this embodiment, ink and toner are shown as colorants,
The same effect can be obtained with pigment-dispersed ink such as liquid toner.

[0031]

As described above, according to the present invention, the spontaneous polarization is changed by applying thermal stimulus to the pyroelectric material with the heater and the optical signal to control the printing,
Since a high print control voltage is not required to control the drawing of the toner and the ink to the recording paper, an image forming apparatus that can be configured with an inexpensive driver can be realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electrostatic inkjet printer according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an electrostatic inkjet printer according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of an electrostatic inkjet printer according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of an electrostatic inkjet printer according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a toner direct spraying method according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a toner direct spraying method according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of an electrostatic latent image forming head according to a seventh embodiment of the present invention.

FIG. 8 is a configuration diagram of an ion flow type electrostatic latent image forming head of an eighth embodiment of the present invention.

FIG. 9 is a configuration diagram of an electrostatic inkjet printer according to a ninth embodiment of the present invention.

FIG. 10 is a conceptual diagram of a conventional electrophotographic method.

FIG. 11 is a conceptual diagram of a conventional ion flow system.

FIG. 12 is a conceptual diagram of a conventional toner direct spraying method.

FIG. 13 is a conceptual diagram of a conventional electrostatic suction type inkjet system.

[Explanation of symbols]

 10 Recording Paper 21 Pyroelectric Dielectric 22 Heating Resistor 23 Lead 24 Nozzle Side Electrode 25 Insulator 26 Ink Nozzle Hole 27 Ink Tank 28 Ink Meniscus 29 Counter Electrode 41 Developer Sleeve 42 Toner Box 45 Corona Charger 46 Ion Blowout Port Electrode 47 Ion passage hole 48 Dielectric 49 LED array

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location G03G 15/00 B41J 3/18 101 G03G 15/00 (72) Inventor Hiroshi Tomiyasu Kadoma City, Osaka Prefecture 1006 Kadoma Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A voltage conversion means for controlling the surface potential of a dielectric material by changing the spontaneous polarization of the dielectric material by applying thermal stimulus to the dielectric material having pyroelectricity by a heating means. An image forming apparatus characterized by the above. 2. A potential generated by the voltage converting means is superimposed on a uniform electric field formed by a counter electrode arranged on the surface of the recording paper so as to face the ink discharge port electrode formed on the ink discharge port. 2. The image forming apparatus according to claim 1, wherein the electrostatic attraction force causes the ink to fly and the drawing onto the recording paper is controlled. 3. A potential generated by the voltage converting means is superposed on a uniform electric field formed by an ink discharge port electrode formed at the ink discharge port and a back electrode arranged behind the ink discharge port electrode. 2. The image forming apparatus according to claim 1, wherein the electrostatic attraction force causes the ink to fly and the drawing onto the recording paper is controlled. 4. The toner is electrostatically attracted by superposing a potential generated by the voltage converting means on a uniform electric field formed by a counter electrode arranged on the back surface of the recording paper so as to face the toner carrier. The image forming apparatus according to claim 1, wherein the image forming apparatus controls the drawing of the recording paper to fly. 5. A uniform electric field formed by a counter electrode disposed on the back surface of the recording paper so as to oppose an electric potential generated by the voltage converting means to an ion outlet electrode arranged at an ion outlet of a corona charger. 2. The image forming apparatus according to claim 1, wherein ions are caused to fly by an electrostatic attraction force to control extraction of the ions to the electrostatic latent image recording material. 6. A light emission control means for light energy is arranged in place of the heating means.
The image forming apparatus according to any one of 3, 4, and 5.