WO2007052340A1 - Tete d'impression de type a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression - Google Patents

Tete d'impression de type a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression Download PDF

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Publication number
WO2007052340A1
WO2007052340A1 PCT/JP2005/020138 JP2005020138W WO2007052340A1 WO 2007052340 A1 WO2007052340 A1 WO 2007052340A1 JP 2005020138 W JP2005020138 W JP 2005020138W WO 2007052340 A1 WO2007052340 A1 WO 2007052340A1
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WO
WIPO (PCT)
Prior art keywords
discharge
heat
heating
print head
type print
Prior art date
Application number
PCT/JP2005/020138
Other languages
English (en)
Japanese (ja)
Inventor
Hisanobu Matsuzoe
Original Assignee
Fukuoka Technoken Kogyo, Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fukuoka Technoken Kogyo, Co., Ltd. filed Critical Fukuoka Technoken Kogyo, Co., Ltd.
Priority to PCT/JP2005/020138 priority Critical patent/WO2007052340A1/fr
Priority to JP2007524119A priority patent/JPWO2007052620A1/ja
Priority to PCT/JP2006/321687 priority patent/WO2007052620A1/fr
Publication of WO2007052340A1 publication Critical patent/WO2007052340A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133348—Charged particles addressed liquid crystal cells, e.g. controlled by an electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
    • B41J2/41—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing
    • B41J2/415—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material for electrostatic printing by passing charged particles through a hole or a slit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/054—Apparatus for electrographic processes using a charge pattern using X-rays, e.g. electroradiography
    • G03G15/0545—Ionography, i.e. X-rays induced liquid or gas discharge

Definitions

  • the present invention relates to a heat discharge type print head that forms an image on a recording medium such as a digital paper by irradiating and emitting ions by discharge, and an image forming apparatus including the same.
  • Patent Document 1 an ion irradiation method, which is an electrostatic latent image forming method different from the electrophotographic method, has been developed.
  • the electrophotographic method uses two processes, uniform charging and exposure, to release the exposed portion of the charge on the uniformly charged photoconductor, thereby forming an electrostatic latent image on the photoconductor as the electrostatic latent image carrier.
  • the ion irradiation method in an atmosphere where ions can be generated (such as in the air), only selective charging (electrostatic latent image formation charging) is performed by irradiation of ions generated by discharge from the discharge electrode. Since the formation of an electrostatic latent image can be completed on an electrostatic latent image carrier (it is not necessarily a photoconductor as long as it is an insulator), a more simplified electrostatic latent image formation method It is.
  • the application of such an electrostatic latent image forming method is a static development method for a recording medium of an electrostatic development method in which a visible image appears inside due to the action of the electrostatic latent image formed on the surface.
  • An electrostatic latent image can be directly formed by ion irradiation to change the latent image into a visible image.
  • the heating / discharging method as shown in (Patent Document 1) and (Patent Document 2), which discharges by selective heating of the discharge electrode, is a driver IC that supports low withstand voltage such as 5V drive for heating control. From the viewpoint of controlling discharge, this is the most excellent control method. For this reason, it is an optimal print head that is currently conceivable for writing in a non-contact manner on an electrostatic development type recording medium generally called digital paper.
  • a minute ball is color-coded into two colors (for example, black and white), and the ball is rotated by the difference in electrical characteristics of each color to display an arbitrary color
  • a minute ball Electrophoresis in which fine powder of two colors (for example, black and white) is mixed in the ball and only one color is floated and displayed due to the difference in electrical characteristics of the fine powder of each color
  • a liquid crystal system that displays the background color of the part where the shutter is opened by opening and closing the liquid crystal shutter of the liquid crystal plate or micro liquid crystal block.
  • Patent Document 1 Japanese Patent Laid-Open No. 2003-326756
  • Patent Document 2 Japanese Patent Application No. 2004-069350
  • the electrode pattern for energizing the heating element and the heating control are complicated, so that the mounting density and the recording speed are improved. It was a restriction.
  • a heating discharge type print head capable of improving the resolution, quality, and recording speed of an image by reliably performing heating control of the discharge electrode without being restricted by the manufacturing technology, There has been a strong demand for an image forming apparatus equipped with the same.
  • the present invention meets the above-mentioned demands.
  • the discharge from the discharge electrode can be controlled easily and reliably without unevenness, and the structure is simplified. It has excellent mass productivity and reliability, has excellent design flexibility that does not impose manufacturing restrictions on the shape and arrangement of the discharge electrode, and can easily mount images at high density to improve image resolution and recording speed.
  • High-quality and highly practical heat-discharge type stamp that can be improved
  • An image with a heat-discharge-type printhead that provides excellent image quality and reliability, as well as versatility that enables electrostatic latent images to be formed on various types of electrostatic development image recording media and various electrostatic latent image carriers.
  • An object is to provide a forming apparatus.
  • a heat-discharge type print head of the present invention and an image forming apparatus including the same have the following configurations.
  • the heating discharge type print head according to claim 1 of the present invention is a heating discharge type print head that controls the generation of discharge from the discharge electrode by controlling the temperature of the discharge electrode to which a discharge control voltage is applied. And a heating unit that heats the discharge electrode that is disposed apart from the discharge unit and that heats the discharge electrode.
  • This configuration has the following effects.
  • a discharge can be generated by selectively heating the discharge electrode by a heating means that does not need to control the discharge control voltage to be a voltage, and a visible image can be formed on the recording medium.
  • the heating means for heating the discharge electrode is disposed away from the discharge portion having the discharge electrode, the discharge electrode without providing an insulating film or the like for insulating the discharge electrode and the heating means It is possible to reliably insulate from the heating means, reduce the number of manufacturing steps, and improve the mass productivity and the reliability of the heating control.
  • the heating means can be moved.
  • a plurality of discharge electrodes or arbitrary positions of the discharge electrodes can be selectively heated, the fine adjustment of the heating position can be facilitated, the image quality can be improved, and the heating means can be reduced in size, saving space. Excellent in properties.
  • the discharge part and the heating means are arranged apart from each other, the discharge part and the heat source do not come into contact with each other! Therefore, the cooling time of the discharge electrode in the heating stopped state is greatly shortened. Therefore, it is possible to improve the responsiveness to the heating stop, switch the presence or absence of discharge in a short time, and improve the image quality and the recording speed.
  • the discharge control voltage applied to the discharge electrode is V ⁇ , which does not cause a discharge when only applied, but a voltage range where a discharge occurs by heating the discharge electrode to which the voltage is applied. Since the generation of discharge can be controlled by applying a discharge control voltage to the electrode and heating with the heating means, any discharge electrode or any position of the discharge electrode can be easily selected by selecting the heating location by the heating means ( Discharge can be selectively generated from the discharge generating portion), and the flexibility of the shape of the discharge electrode is excellent. Of the discharge part, the vicinity of the heating position by the heating means is the discharge generation part.
  • the discharge part is formed by depositing a metal such as gold, silver, copper, or aluminum on the substrate by vapor deposition, sputtering, printing, plating, etc., and then etching as necessary to form a pattern of the discharge electrode or common electrode. It is preferable to use at least a part of a metal such as stainless steel, copper, aluminum, etc. after thinning by etching, cutting, etc., and then patterning the discharge electrode by etching, laser processing, etc., if necessary. .
  • the discharge electrode may be formed using a conductive material such as carbon.
  • the material of the substrate may be any material that can form the discharge part on the surface and has heat resistance to withstand the heating by the heating means.
  • those having heat transfer properties that can transfer heat generated by the heating means to the discharge electrode are preferably used.
  • synthetic resins such as glass, polyimide, aramid, and polyetherimide are preferably used.
  • the discharge portion includes, for example, connecting one end portions of the plurality of discharge electrodes with a common electrode. It can be formed in a comb shape, or can be formed in a ladder shape by connecting both ends of a plurality of discharge electrodes with a common electrode.
  • a common electrode in the vicinity of the discharge electrode, the cooling effect of the discharge electrode and responsiveness to heating stop can be achieved by increasing the heat radiation area of the discharge part and increasing the heat capacity.
  • the discharge stability and the like can be further improved.
  • the discharge portion (discharge electrode) formed in a flat plate shape is a common electrode except for the discharge generation portion.
  • the common electrode is wider than the discharge electrode, it will temporarily be 100-30.
  • the discharge can be stopped quickly in response to heating off, and the discharge time interval can be shortened in a short time.
  • the presence or absence of discharge can be switched, and the recording speed can be increased.
  • the resistance value of the common electrode can be reduced, and the potential difference generated between the discharge electrodes connected by the common electrode can be suppressed as much as possible. Excellent stability.
  • each discharge electrode can be formed in a substantially rectangular shape, trapezoidal shape, semicircular shape, bullet shape, or a combination thereof.
  • the peripheral length around the edge of the discharge electrode can be increased by further dividing a part of the discharge electrode with a slit or by forming an uneven portion on the peripheral edge. Since the discharge electrode has a large discharge amount of peripheral edge force, increasing the discharge amount from the discharge electrode can increase the amount of ions and the emitted light intensity by increasing the circumference around the edge.
  • the discharge control voltage and heating temperature can be set low, and energy saving and discharge generation efficiency are excellent. In addition, since the voltage applied to the discharge electrode can be set low, the discharge electrode is also excellent in long life.
  • a discharge hole portion may be formed in the vicinity of the discharge generating portion (heating position).
  • the peripheral force at the edge of the discharge hole can also generate a discharge, and the same effect as dividing the end of the discharge electrode can be obtained.
  • the shape of the discharge hole portion can be formed in various shapes such as a substantially circular shape, a substantially elliptical shape, a polygon such as a quadrangle and a hexagon, and a star shape. Further, the number and size of the discharge hole portions per location of the discharge generation portion (near the heating position) can be appropriately selected and combined. It should be noted that the uneven portions of the discharge electrode and the discharge holes can be formed by the above-described etching or laser heating.
  • a conductive material layer may be formed on at least the surface of the common electrode in the discharge part.
  • the resistance value of the common electrode can be further reduced, the potential difference generated between the respective discharge electrodes can be reliably reduced, and the discharge stability is excellent.
  • the conductive material layer has conductivity superior to that of the discharge part, it can be easily formed by screen printing of silver paste or silver plating. By increasing the thickness of the conductive material layer, the resistance value of the common electrode can be reduced, and the discharge stability can be improved.
  • the thickness of the discharge electrode is preferably 0.1 ⁇ m to 100 m when it is formed with a force plate depending on the material.
  • the discharge electrode tends to be affected by wear as the thickness of the discharge electrode becomes thinner than 0. m, and the life of the discharge electrode tends to be shortened. As the thickness exceeds 100 m, the heat capacity increases, and the response to heating on and off is increased. There is a tendency to be easily lowered, and deviation is not preferable. By reducing the thickness of the discharge electrode to 100 m or less, it is possible to quickly recover from the heated state and to increase the printing speed.
  • a method of irradiating laser light a method of irradiating infrared rays, or the like is preferably used.
  • a method of irradiating laser light a laser scanner unit similar to the conventional electrophotographic method can be used, and the laser irradiation unit is combined with a polygon mirror or a galvano mirror to scan only the laser light with respect to the discharge electrode.
  • a device that serially scans the laser irradiation portion itself with respect to the discharge electrode is preferably used.
  • laser light or infrared light may be condensed by an optical fiber or a condensing lens and irradiated to the discharge electrode.
  • the discharge part can be formed by depositing chromium and gold plating directly on the exit tip of the optical fiber or on the surface of the condenser lens. In this case, an image can be formed by scanning the discharge portion together with the heating means with respect to the recording medium.
  • the discharge electrode is easily generated from the peripheral edge of the discharge electrode by making the width of the discharge electrode narrower than the spot diameter of laser light or infrared rays. Excellent in properties.
  • the range of the discharge generation part is defined by the spot diameter of laser light or infrared rays, variation in the discharge amount due to the displacement of the heating position can be reduced, and the image quality is excellent in uniformity.
  • the distance for separating the heating means and the discharge electrode is defined by the output of the heating means and the size and arrangement of the polygon mirror, galvanometer mirror, condenser lens, and the like. Moreover, you may cover between a heating means and a discharge electrode with a heat insulating material as needed. The heat generated by the heating means can be efficiently transferred to the discharge electrode without escaping to the outside, and malfunction due to external heat can be surely prevented, resulting in excellent reliability.
  • a heat discharge type print head according to claim 2 of the present invention is the heat discharge type print head according to claim 1, wherein the heating means includes a laser irradiation section. Yes. With this configuration, in addition to the operation of claim 1, the following operation is provided.
  • any discharge electrode to which a discharge control voltage is applied or any position of the discharge electrode can be selectively heated with laser light to generate a discharge.
  • the minute range can be heated, so that the recording medium is irradiated with electrons, ions, ultraviolet rays, etc. in one place. Therefore, it is possible to improve the image quality and improve the image quality.
  • the discharge generation part By irradiating the laser beam from the laser irradiation part, the discharge generation part can be heated with a substantially constant amount of heat, so that it is possible to reduce heating spots and suppress the occurrence of variations in the discharge amount. Image quality can be improved.
  • the laser irradiating part can be heated by irradiating the discharge generating part of the discharge electrode with laser light.
  • the layout of the entire apparatus and the shape of the discharge electrode It can be selected as appropriate according to the arrangement, the irradiation direction of electrons, ions, ultraviolet rays, and the like.
  • the discharge electrode is heated by irradiating laser light from the back side of the substrate. Electrode surface forces can also generate a discharge.
  • the surface of the board An image can be formed on the recording medium by arranging the surface and the medium substrate surface (recording surface) of the recording medium to face each other and irradiating ions, etc. due to discharge in a direction substantially orthogonal to the discharge electrode.
  • the discharge electrode surface is heated by irradiating laser light from the front surface or the back surface side of the substrate. Force discharge can be generated.
  • an image can be formed on the recording medium by arranging the end face of the substrate and the medium substrate surface (recording surface) of the recording medium to face each other and irradiating ions or the like due to discharge in a direction substantially perpendicular to the discharge electrode.
  • the discharge electrode is heated by irradiating laser light from the front surface or the back surface side of the substrate.
  • the force near the electrode end face can also generate a discharge.
  • an image can be formed on the recording medium by arranging the end face of the substrate and the medium substrate surface (recording surface) of the recording medium to face each other and irradiating ions or the like due to discharge in a substantially square direction with respect to the discharge electrode.
  • the discharge electrode of the heat discharge type print head is provided on the surface opposite to the medium substrate surface (back side of the recording medium) of the recording medium on which recording is performed by irradiating ions accompanying discharge from the heat discharge type print head.
  • ions can be reliably irradiated from the discharge electrode of the heat discharge type print head toward the recording medium. Since the irradiation position accuracy can be improved, the unit dots in the recording medium can be miniaturized to form a high-definition image.
  • the invention described in claim 3 is the heat discharge type print head according to claim 1 or 2, wherein the discharge electrode is formed, arranged, or coated on the surface of the discharge electrode heated by the heating means. It has a structure with a heat absorption layer provided!
  • the heat absorption layer can be formed by, for example, black paint, chrome plating, etc.
  • the heat absorption layer is heated on the substrate. What is necessary is just to form a discharge part after forming an absorption layer.
  • a heat absorption layer may be formed by chrome plating or the like directly on at least the surface of the discharge electrode heated by the heating means.
  • a heat absorption layer formed of a black colored film or chrome-plated glass may be laminated with the discharge part.
  • the invention according to claim 4 is the heat-discharge type print head according to claim 3, wherein the heat absorption layer includes a print pattern formed according to image information. is doing.
  • the discharge electrode can be selectively heated reliably based on the image information, and the reliability of image formation can be improved. Excellent.
  • the heat absorption layer can be formed of a film, glass or the like and laminated on the discharge part. Since it can be easily replaced by making the heat absorption layer detachable with respect to the discharge part, it is sufficient to prepare a print pattern corresponding to the image information to be printed frequently. If a black solid heat absorption layer is used, it can be selectively heated by a heating means as usual, and an arbitrary image can be formed.
  • the invention according to claim 5 is the heating discharge type print head according to any one of claims 1 to 4, wherein the discharge portion is excluded from the discharge generation portion of the discharge portion. It has a structure provided with an overlying covering film.
  • a step can be formed between the surface of the discharge generation part and the surface of the coating film, so that it faces the discharge electrode.
  • the gap between the recording medium and the recording medium to be arranged can be kept constant, the contact with the discharge generation part can be prevented, and the discharge with the strength of the discharge generation part can be stabilized.
  • the coating film is covered with the common electrode and over the discharge electrode excluding the discharge generation part. More specifically, the coating film has an opening formed in a substantially circular shape, a substantially elliptical shape, a substantially bullet-like shape, a substantially rectangular shape, or the like in the discharge generation portion (near the heating position by the heating means) of the discharge portion. .
  • the opening may be formed independently for each of the plurality of discharge generation portions, or may be formed in a long hole shape so as to extend over the plurality of discharge generation portions.
  • the coating film is made of an insulator and is made of glass, synthetic resin such as aramid polyimide, SiO
  • Ceramics such as 2 and my strength are preferably used.
  • the coating film can be formed by screen printing, vapor deposition, sputtering, or the like.
  • the invention according to claim 6 is the heat-discharge type print head according to claim 5, wherein the print head has an uneven portion formed on the surface of the coating film.
  • the concavo-convex portions of the coating film can be easily formed by screen printing or the like, the presence or absence of the concavo-convex portions does not complicate the coating film forming process and is excellent in mass productivity. Also, using inorganic materials such as SiON and SiO and other insulating materials (regardless of organic and inorganic),
  • An uneven portion may be formed on the surface of the coating film.
  • An image forming apparatus has a configuration including the heat-discharge type print head according to any one of claims 1 to 6. This configuration has the following effects.
  • An image can be formed by ion irradiation or light emission by discharge from a heat-discharge type print head, and the image forming process can be simplified.
  • the image forming apparatus can form an image on a recording medium that has been initialized in advance and whose printing content has been erased.
  • a charging roller, charging brush, etc. as a restoring device, the surface of the recording medium can be uniformly charged inside the image forming apparatus to initialize the recording medium, and rewriting to the recording medium is repeated. Can do.
  • an electronic paper such as a twisting ball method, an electrophoretic method, or a liquid crystal method is preferably used. It is also possible to form an image on an electronic paper or the like using an organic-inorganic nanocomposite that is reduced by acid reduction with a metal ion such as bismuth ion. Furthermore, an electronic paper using a photochromic compound that reacts to light emission by discharge can also be used.
  • the invention according to claim 8 is the image forming apparatus according to claim 7, wherein the visible image appears inside due to the action of electric charges due to the discharge of the heating and discharging type print head. On the other hand, it has a configuration for recording.
  • a ground electrode part for applying an electric field between the discharge electrode of the heat discharge type print head and the recording medium or a positive voltage applying part for applying a positive voltage is disposed on the back side of the recording medium.
  • a positive voltage By applying a positive voltage, negative ions generated by discharge are attracted to the surface of the recording medium. Therefore, it is possible to reliably irradiate the recording medium with ions and to improve the image quality.
  • the invention according to claim 9 is the image forming apparatus according to claim 7, wherein the image forming apparatus includes an electrostatic latent image carrier that faces the heat discharge type print head. .
  • an electrostatic latent image can be formed on the surface of the electrostatic latent image carrier by ion irradiation from the heat discharge type print head. Since the electrostatic latent image can be used to electrostatically develop the recording medium to form a visible image, the heating / discharge type print head does not directly face the recording medium, and the heating / discharge type print head becomes dirty. Can be prevented.
  • the electrostatic latent image carrier various shapes such as a drum type and a belt type can be used.
  • the material of the electrostatic latent image carrier any material can be used as long as its surface is charged by ion irradiation. Therefore, an insulator such as alumite that does not need to be a photoconductor can be used. If the electrostatic latent image carrier is a photoconductor, it can be neutralized by irradiating it with light, and if it is an insulator, it can be neutralized with an AC voltage. In addition, when the electrostatic latent image carrier is an insulator, it is less likely to deteriorate than the photoreceptor and has a long life.
  • the invention according to claim 10 is the image forming apparatus according to claim 9, wherein the electrostatic latent image carrier and an electrostatic latent image formed on a surface of the electrostatic latent image carrier.
  • an electrostatic latent image can be formed on the surface of the electrostatic latent image carrier by irradiating ions from the heat-discharge type print head, an exposure optical system such as a polygon mirror is not required, and the number of parts is reduced. Less structure can be simplified.
  • a visible image can be formed on the surface of the electrostatic latent image carrier, and the visible image is transferred to the printing medium by the transfer means.
  • various media such as OHP sheets and glossy paper can be used as printing media, and the versatility is excellent.
  • the electrostatic latent image carrier the same ones as described above can be used.
  • the developing means a developing device that performs toner development is preferably used, but development may be performed by ink or other methods.
  • a transfer means for transferring a visible image to a printing medium a transfer fixing roller in which the surface of a metal roller such as aluminum is covered with a synthetic rubber such as silicone rubber is preferably used. If a pressure fixing type toner is used during toner development, a visible image can be transferred to a printing medium and fixed by pressing with a transfer means.
  • the image forming apparatus includes a cleaner that physically removes and cleans the toner remaining on the surface of the electrostatic latent image carrier after transfer, and before writing (ion irradiation) with a heat-discharge type print head. It is preferable to provide a static eliminator for neutralizing the surface of the electrostatic latent image carrier. As a result, an electrostatic latent image can be formed on the surface of the electrostatic latent image carrier in a stable state at all times, and the reliability is excellent. In addition, when an insulator such as anodized is used as the electrostatic latent image carrier, it is particularly excellent in long-life property because scratching damage by the cleaner hardly occurs.
  • the discharge part and heating means manufactured separately can be used in a simple combination. It is possible to provide a heat discharge type print head excellent in maintainability and resource saving that can easily repair and replace the discharge part or the heating means in which a combination occurs.
  • the heating means arranged apart from the discharge part can be moved to selectively heat a plurality of discharge electrodes or any position of the discharge electrodes, fine adjustment of the heating position is easy. It is easy to improve the image quality, and it is possible to provide a high quality heat discharge type print head that can downsize the heating means and is excellent in space saving.
  • the heating means has a laser irradiation section, any discharge electrode to which a discharge control voltage is applied or any position of the discharge electrode can be selectively heated with laser light to generate a discharge. It is possible to provide a heat-discharge type print head that is easy to control, has excellent design flexibility and is practical.
  • a heat absorption layer is formed or disposed on the surface of the discharge electrode heated by the heating means.
  • a heat discharge type print head excellent in heating efficiency that can absorb heat generated by the heating means in the heat absorption layer and reliably transfer the heat to the discharge electrode. it can.
  • the discharge electrode can be selectively heated reliably based on the image information.
  • a discharge type print head can be provided.
  • a highly reliable heat discharge type print head capable of maintaining a constant gap with the medium, preventing contact between the discharge generation part and the recording medium, and stabilizing the discharge from the discharge generation part. Can be provided.
  • the unevenness formed on the surface of the coating film extends the surface distance, increases the surface resistance, and prevents the discharge generating force of the delaminated discharge electrode from leaking to the surroundings. It is possible to provide a heat-discharge type print head excellent in discharge stability and efficiency without causing a decrease in applied voltage (discharge control voltage) applied to the electrode.
  • An image forming apparatus capable of forming an image by irradiating and emitting ions by discharge from a heat discharge type print head is simple and has excellent productivity.
  • the discharge from the heat discharge type print head can form a visible image in a non-contact manner inside the recording medium, and the damage to the recording medium with a small number of parts can be minimized. It is possible to provide an image forming apparatus with excellent mass productivity, practicality and reliability.
  • a recording medium can be electrostatically developed with an electrostatic latent image formed on the surface of an electrostatic latent image carrier by irradiation of ions from a heat-discharge type print head, a visible image can be formed. It is possible to provide an image forming apparatus excellent in practicality and reliability in which the discharge type print head and the recording medium do not directly face each other, and the heat discharge type print head can be prevented from being stained.
  • the visible image formed on the surface of the electrostatic latent image carrier by the visible image means can be transferred to the printing medium by the transfer means, such as OHP sheet, glossy paper, etc. in addition to plain paper
  • An image forming apparatus excellent in versatility and practicality capable of printing on various printing media can be provided.
  • the electrostatic latent image carrier that can form an electrostatic latent image only by selective charging (electrostatic latent image formation charging) by ion irradiation need not be a photoconductor, the range of material selection However, it is possible to provide an image forming apparatus that is widely versatile, has excellent mass productivity, and has a long life.
  • FIG. 1 (a) Schematic cross-sectional view of the main part showing the use state of the heat-discharge type print head in Embodiment 1 (b) Main part showing the head substrate of the heat-discharge type print head in Embodiment 1 Schematic plan view
  • FIG. 2 (a) Schematic plan view of the main part showing a first modification of the head substrate of the heat-discharge type print head in Embodiment 1 of the present invention. (B) A—A line arrow in FIG. 2 (a) Visual end view
  • FIG. 3 is a schematic end view of a main part showing a second modification of the head substrate of the heat-discharge type print head according to the first embodiment of the present invention.
  • FIG. 4 (a) Main part schematic view showing the head substrate of the heat discharge type print head in Embodiment 2. (b) Main part schematic plane showing the head substrate of the heat discharge type print head in Embodiment 2.
  • FIG. 5 is a plan view showing a modification of the head substrate of the heat-discharge type print head in the third embodiment.
  • FIG. 6 is a schematic diagram of a main part showing a configuration of an image forming apparatus in Embodiment 4.
  • FIG. 7 is a main part schematic diagram showing the configuration of the image forming apparatus in the fifth embodiment.
  • FIG. 8 is a schematic diagram of a main part showing the configuration of an image forming apparatus in Embodiment 6.
  • FIG. 9 is a schematic diagram of a main part showing the configuration of an image forming apparatus in a seventh embodiment.
  • FIG. 1 (a) is a schematic cross-sectional view showing a main part of the heat discharge type print head used in the first embodiment
  • FIG. 1 (b) is a head substrate of the heat discharge type print head in the first embodiment. It is a principal part schematic top view which shows these.
  • 1 is a heat discharge type print head according to Embodiment 1 of the present invention
  • 2 is a head substrate of the heat discharge type print head 1
  • 3 is formed of a synthetic resin such as glass, polyimide, aramid, or polyetherimide.
  • the substrate of the head substrate 2, 4 is the heat absorption layer of the head substrate 2 formed by applying black paint containing carbon etc.
  • 5 is gold, silver
  • etching is performed to form a ladder-type board 2
  • 5a is a plurality of discharge electrodes of discharge section 5
  • 5b is a plurality of discharge electrodes
  • the common electrode of the discharge part 5 connected to both ends of the discharge electrode 5a, 6 is disposed apart from the discharge part 5, and is a laser irradiation part that selectively heats the discharge electrode 5a from the back side of the head substrate 2.
  • Heating discharge type print head with 1 heating means, 7 is A discharge generating portion of the discharge electrode 5 that generates a discharge when heated by the heating means 6, 20 is a digital page on which a visible image is formed by the action of electric charges from the discharge electrode 5 of the heat discharge type print head 1.
  • 21 is a medium substrate surface of the recording medium 20, 22 is a surface of the medium substrate of the recording medium 20, and 22 is a voltage application unit of the recording medium 20 that is disposed on the back side of the recording medium 20 and to which a positive voltage is applied. It is.
  • a black paint is applied on one surface of the substrate 3 made of synthetic resin such as glass, polyimide, aramid, or polyetherimide, or chromium is vapor-deposited to heat the heat absorption layer.
  • the material of the substrate 3 is not limited to the present embodiment, the heat absorption layer 4 and the discharge part 5 can be formed on the surface, and the heat resistance that can withstand the heating by the heating means 6 If the heating means 6 is capable of transferring heat generated by the heating means 6 to the discharge electrode 5,
  • a plurality of discharge electrodes 5a and a common electrode 5b connecting them are formed on the surface of the substrate 3 on which the heat absorption layer 4 is formed.
  • the discharge electrode 5a and the common electrode 5b are formed by depositing a metal such as gold, silver, copper, or aluminum by vapor deposition, sputtering, printing, plating, etc., and then forming a pattern by etching, laser coating, or the like. Is preferably used.
  • a conductive material such as carbon may be used.
  • the discharge part 5 is formed in a ladder shape and divided into a plurality of discharge electrodes 5a, thereby increasing the discharge amount of the peripheral force of the discharge electrode 5a and improving the discharge efficiency. Also discharge By providing the common electrode 5b in the vicinity of the electrode 5a, the cooling effect of the discharge electrode 5a and the response to heating stop are improved by increasing the heat radiation area of the discharge part 5 and increasing the heat capacity. Furthermore, since a stable voltage can always be applied by reducing the resistance value, the discharge stability is also excellent.
  • the shape of the discharge part 5 is not limited to the present embodiment, and the number and arrangement of the discharge electrodes 5a can be selected as appropriate, and can also be arranged in a staggered pattern, a grid pattern, or the like. .
  • the entire discharge part 5 may be formed in a single flat plate shape such as a rectangular shape or a square shape. ⁇ .
  • only one end portion of the plurality of discharge electrodes 5a may be connected to the common electrode 5b to form a comb shape, or a part of the discharge electrode 5a may be further divided by a slit or the like, or an uneven portion may be formed on the peripheral portion. It may be formed.
  • a discharge hole portion may be formed in the discharge generation portion 7 (near the heating position) of the discharge electrode 5a.
  • the edge peripheral force of the discharge hole can also generate a discharge, and the same effect as dividing the end of the discharge electrode 5a can be obtained.
  • the shape of the discharge hole can be formed in various shapes such as a substantially circular shape, a substantially elliptical shape, a polygon such as a quadrangle and a hexagon, and a star shape. Note that the number, shape, and size of the discharge hole portions per location in the discharge generating portion 7 (near the heating position) can be appropriately selected and combined.
  • the AC voltage and DC voltage applied to the discharge electrode 5a can be used in various combinations.
  • the discharge electrode 5a is superimposed with a voltage of 700V by DC bias on AC550Vpp (triangular wave 1kHz) as an example. Applied as a discharge control voltage.
  • AC550Vpp triangular wave 1kHz
  • a discharge control voltage When only an AC voltage is applied to the discharge electrode 5a, a force that generates positive and negative ions is superimposed.
  • a negative DC voltage only negative ions can be selected, and the discharge can be stabilized.
  • a positive DC voltage may be superimposed on an AC voltage.
  • Discharging does not occur just by applying a discharge control voltage to the discharge electrode 5a, and the heating means 6 is separately controlled to selectively heat the discharge electrode 5a to the substrate 3 side force (100 to 300 ° C). As a result, a discharge is generated from the selectively heated discharge electrode 5a.
  • an electrostatic latent image can be formed or an image can be formed by an oxidation-reduction reaction.
  • an image can be formed on a recording medium that reacts to light emission such as ultraviolet light and visible light.
  • the heating discharge type print head 1 in the present embodiment controls the generation of discharge by controlling the temperature of each discharge electrode 5a to which a discharge control voltage is applied.
  • the applied voltage is constant and does not need to be controlled, and by controlling the presence or absence of heating by the heating means 6, it is possible to control the generation of ions and to generate a large amount of ions efficiently.
  • a ground electrode section is formed on the back surface of the recording medium 20. May be provided and grounded, or a voltage may be applied between the discharge electrode 5a and the voltage application unit 22.
  • the heating means 6 provided with the laser irradiation unit may be a combination of a polygon mirror and a galvanometer mirror.
  • the arbitrary discharge electrode 5a can be heated by serially scanning the heating means 6 itself, and an image can be formed on the recording medium 20.
  • laser light may be condensed with an optical fiber and irradiated.
  • the heating means 6 it is sufficient if the discharge electrode 5 a can be selectively heated away from the discharge part 5.
  • infrared rays are transmitted with an optical fiber or a condensing lens. What is condensed and irradiated is preferably used. In order to obtain a high-quality image, it is necessary to scan the laser beam and infrared rays with a small force.
  • the heating means 6 must be combined with a polygon mirror, a galvano mirror, a condensing lens, etc., and the heating means 6 Must be separated from the discharge electrode 5a.
  • the distance for separating the heating means 6 and the discharge electrode 5a is defined by the output of the heating means 6 and the size and arrangement of the polygon mirror, galvanometer mirror, condenser lens, and the like.
  • the space between the heating means 6 and the discharge electrode 5a may be covered with a heat insulating material. As a result, the heat generated by the heating means 6 can be efficiently transmitted to the discharge electrode 5a without escaping to the surroundings, and malfunction due to external heat can be surely prevented, resulting in excellent reliability.
  • discharge generation from the discharge electrode 5a is controlled by controlling the temperature of the discharge electrode 5a to which the discharge control voltage is applied, preparation for discharge is performed with the discharge control voltage applied to the discharge electrode 5a.
  • the discharge electrode 5a can be selectively heated by the heating means 6 that does not need to control a high discharge control voltage, and a discharge can be generated to form a visible image on the recording medium 20.
  • the heating means 6 for heating the discharge electrode 5a is disposed apart from the discharge portion 5 having the discharge electrode 5a, an insulating film for insulating the discharge electrode 5a and the heating means 6 is used. Without being provided, the discharge electrode 5a and the heating means 6 can be reliably insulated, the number of manufacturing steps can be reduced, and the mass productivity and the reliability of the heating control can be improved.
  • the heating unit 7 is moved to selectively select a plurality of discharge electrodes 5a or arbitrary positions of the discharge electrodes 5a. Heating can be performed, the fine adjustment of the heating position is easy, the image quality can be improved, and the heating means 6 can be miniaturized, resulting in excellent space saving.
  • any discharge electrode 5a to which a discharge control voltage is applied or an arbitrary position of the discharge electrode 5a is selectively heated by laser light to generate discharge. Can be made.
  • the recording medium 20 can be irradiated with electrons, ions, ultraviolet rays, and the like in a centralized location, which is excellent in image formation efficiency and image quality. Image quality can be improved.
  • FIG. 2 (a) is a schematic plan view showing the main part of the head substrate of the heat-discharge type print head according to the second embodiment
  • FIG. 2 (b) is an end view taken along line AA in FIG. 2 (a). It is.
  • the head substrate of the heat discharge type print head in the second embodiment is different from that in the first embodiment in that the head substrate 2a has a coating film 8 covered on the surface of the discharge part 5, The point is that the coating film 8 has a substantially circular opening 8a at a position where the coating film 8 hits the discharge generating portion 7 of each discharge electrode 5a.
  • the manufacturing method of the head substrate of the heat discharge type print head in the second embodiment is different from the first embodiment in that a coating film forming step for forming the coating film 8 on the surface of the discharge part 5 is added. Yes, and the rest are the same as in Embodiment 1 and will not be described.
  • Covering film 8 is made of glass, synthetic resin such as aramidya polyimide, ceramic such as SiO, My strength, etc.
  • This insulator was formed by screen printing, vapor deposition, sputtering, or the like.
  • the shape of the opening 8a can be formed into a substantially elliptical shape, a substantially bullet-like shape, a substantially rectangular shape, or the like other than a substantially circular shape. Further, instead of forming the plurality of independent openings 8a, a long hole-like opening extending over the plurality of discharge electrodes 5a may be formed.
  • a heat discharge type print head By combining the heating means 7 similar to that of the first embodiment with the head substrate 2a formed as described above, a heat discharge type print head can be obtained.
  • the driving method as the heat discharge type print head is the same as that of the first embodiment, and thus the description thereof is omitted.
  • FIG. 3 is a cross-sectional view showing a modification of the head substrate of the heat discharge type print head in the second embodiment.
  • the modification of the head substrate differs from that of the second embodiment in that the surface of the coating film 8 of the head substrate 2b A plurality of concave and convex portions 8b are formed.
  • the uneven portion 8b of the coating film 8 can be easily formed by screen printing or the like, the presence or absence of the uneven portion 8b does not complicate the coating film forming process and is excellent in mass productivity.
  • inorganic materials such as SiO N and SiO, and other insulating materials (regardless of organic and inorganic) are used.
  • the uneven portion 8b may be formed on the surface of the coating film 8.
  • a step can be formed between the surface of the discharge generation part 7 and the surface of the coating film 8.
  • the gap between the discharge electrode 5a and the recording medium 20 arranged opposite to the discharge electrode 5a can be kept constant, the contact with the discharge generation part 7 can be prevented, and the discharge from the discharge generation part 7 can be stabilized. .
  • FIG. 4 (a) is a schematic cross-sectional view showing the main part of the head substrate of the heat discharge type print head according to Embodiment 3
  • FIG. 4 (b) is the head substrate of the heat discharge type print head according to Embodiment 3. It is a principal part schematic top view which shows these.
  • the head substrate 2d of the heat discharge type print head in the third embodiment is different from the first embodiment in the substantially flat substrate 3 made of a metal such as stainless steel, copper, or aluminum.
  • the discharge electrode 5a is formed by thinning by etching or cutting except for the outer periphery that becomes the common electrode 5b, and a plurality of matrix electrodes are formed by etching or laser caching.
  • the discharge hole portion 9 is provided, and the discharge portion 5 is formed.
  • the discharge electrode 5a is improved in discharge generation efficiency by applying gold plating to the surface.
  • the size of the discharge hole part 9 is formed smaller than the spot diameter of the laser beam and arranged in a matrix form By doing so, it is possible to reliably generate a discharge from the peripheral edge of the discharge hole portion 9, and to reduce variation in the amount of discharge due to the displacement of the heating position, and excellent image quality uniformity.
  • the shape of the discharge hole 9 can be formed in various shapes such as a substantially circular shape, a substantially elliptical shape, a polygonal shape such as a hexagonal shape and an octagonal shape, and a star shape. Further, the number, shape, size, pitch, and the like of the discharge hole portions 9 per one place in the discharge generation portion 7 (near the heating position) can be appropriately selected and combined.
  • the manufacturing method of the head substrate 2d of the heat discharge type print head in the third embodiment is different from that in the first embodiment in that the substrate is obtained by etching, cutting I ", laser processing, etc. in the discharge portion forming step. 3 is directly processed to form the discharge part 5 integrated with the substrate 3.
  • the head substrate 2d can be formed from a single substrate 3, and the number of components can be reduced, and the manufacturing process can be simplified because there is no need for bonding between the substrate 3 and the discharge part 5, etc. It is easy to handle as 2d and has excellent durability and reliability.
  • a heat discharge type print head By combining the heating means 6 similar to that of the first embodiment with the head substrate 2d formed as described above, a heat discharge type print head can be obtained.
  • another member in which the film is colored black or glass is chrome-plated can be used as a heat absorption layer laminated with the head substrate 2d.
  • the heat absorption layer By making the heat absorption layer detachable with respect to the discharge part 5, it can be easily replaced, and the maintenance is excellent.
  • use a solid heat absorption layer of black perform selective heating with heating means 6 to print any image, use a heat absorption layer on which a print pattern is formed in advance, A specific image can be printed repeatedly.
  • the driving method as the heat discharge type print head is the same as that of the first embodiment, and thus the description thereof is omitted.
  • FIG. 5 is a plan view showing a modification of the head substrate of the heat-discharge type print head according to the third embodiment.
  • the modification of the head substrate is different from the third embodiment in that a slit-like discharge hole 9a is formed in the discharge portion 5 of the head substrate 2e.
  • the method of manufacturing the head substrate 2e of the heat-discharge type print head in the modification is different from that of the third embodiment only in the pattern of the discharge hole 9a, and the process is the same, and the description thereof is omitted.
  • the common electrode 5b thicker than the discharge electrode 5a, the heat radiation area of the discharge part 5 can be increased and the heat capacity can be increased. Responsiveness is improved, and a stable voltage can always be applied by reducing the resistance value, so that the stability of discharge can be further improved.
  • the discharge electrode 5a can be selectively heated reliably based on the image information, and the image forming reliability is excellent.
  • FIG. 6 is a schematic diagram of a main part showing the configuration of the image forming apparatus in the fourth embodiment.
  • 10 is an image forming apparatus according to Embodiment 4 provided with a heat discharge type print head 1
  • 11 is an image forming apparatus 10 for uniformly charging a medium substrate surface 21 a of a medium substrate 21 of a recording medium 20.
  • a restorer 22 a is a ground electrode portion that is disposed on the back side of the medium substrate 21 of the recording medium 20 and applies an electric field between the discharge electrode 5 a of the heating and discharging type print head 1 and the recording medium 20.
  • a charging roller, a charging brush, or the like is preferably used as the restoring device 11.
  • a ground electrode roller may be provided instead of the flat ground electrode portion 22a, or a voltage applying unit 22 may be provided to apply a voltage as in the first embodiment.
  • the restorer 11 When irradiating negative ions from the heat discharge type print head 1, the restorer 11 charges the medium substrate surface 21 a of the recording medium 20 to a positive polarity opposite in polarity to the ions irradiated from the heat discharge type print head 1.
  • the combination of the head substrate 2 and the heating means 6 has been described as the heat discharge type print head 1, but the heads R2a, 2b, 2c of the second and third embodiments are described. , 2d, 2e!
  • the image forming apparatus of the fourth embodiment Since the image forming apparatus of the fourth embodiment is configured as described above, it has the following operations.
  • An image can be formed by ion irradiation or light emission by discharge from the heat-discharge type print head 1, and the image forming process can be simplified.
  • An image can be formed on a paper or the like.
  • the recording medium 20 in which a visible image appears inside can be initialized by the action of electric charges due to discharge, and is unnecessary. It is possible to repeatedly rewrite to the recording medium 20 by deleting a new recording.
  • FIG. 7 is a main part schematic diagram showing the configuration of the image forming apparatus in the fifth embodiment.
  • the image forming apparatus 10a according to the fifth embodiment of the present invention is different from the fourth embodiment in that the back side of the head substrate 2d of the heat-discharge type print head la is subjected to black colored film chrome plating.
  • the heat absorbing layer 4a formed of glass or the like is detachably disposed, and an infrared lamp is used as the heating means 6a.
  • the heating means 6a using an infrared lamp simply irradiates the entire surface of the heat absorption layer 4a with infrared rays.
  • the discharge electrode 5a can be heated, and a large amount of images can be formed in a short time.
  • the combination of the head substrate 2d and the heating means 6a using an infrared lamp has been described as the heat discharge type print head la.
  • the head substrate 2 according to the first to third embodiments. 2a, 2b, 2c, 2e may be used, or heating means 6 equipped with a laser irradiation unit may be used.
  • the image forming apparatus of the fifth embodiment Since the image forming apparatus of the fifth embodiment is configured as described above, it has the following operation in addition to the fourth embodiment. (1) Since the heat absorption layer 4a has a print pattern formed in accordance with the image information, the discharge electrode 5a can be selectively heated reliably based on the image information, thereby improving the reliability of image formation. Excellent.
  • FIG. 8 is a schematic diagram of a main part showing the configuration of the image forming apparatus according to the sixth embodiment.
  • the image forming apparatus 10b according to the sixth embodiment of the present invention is different from the fourth embodiment in that the head substrate 2 of the heat discharge type print head lb has a plurality of calorie heat means 6 provided with a laser irradiation unit. And an electrostatic latent image in which an electrostatic latent image is formed on the surface by irradiation of ions from the heat discharge type print head lb.
  • the image bearing member 12 and the static eliminator 13 for neutralizing the surface of the electrostatic latent image bearing member 12 before writing (ion irradiation) by the heat discharge type print head lb are provided.
  • An image can be formed by scanning the head substrate 2 together with the heating unit 6 with respect to the recording medium 20.
  • an optical fiber array 6b in which a large number of optical fibers are arranged with high density and high accuracy, a plurality of discharge electrodes 5a (discharge generating part 7) are simultaneously irradiated with laser light selectively. Therefore, high-speed recording is possible and the utility is excellent.
  • the discharge electrode 5a can also be formed by directly depositing chromium on the outlet end of the optical fiber and plating it with gold.
  • the electrostatic latent image carrier 12 various shapes such as a drum type and a belt type can be used. Further, as the material of the electrostatic latent image carrier 12, any material can be used as long as the surface is charged by irradiation of ions, and therefore an insulator such as alumite that does not need to be a photoconductor can be used. Further, by providing the static eliminator 11, an electrostatic latent image can be formed on the surface of the electrostatic latent image carrier 12 in a stable state, and the reliability is excellent. When the electrostatic latent image carrier 12 is a photosensitive body, it can be neutralized by irradiating light, and when it is an insulator, it can be neutralized with an AC voltage.
  • the operation of the image forming apparatus according to the sixth embodiment of the present invention configured as described above is different from that of the fourth embodiment in that the medium substrate of the recording medium 20 is directly from the heat-discharge type print head lb. Instead of irradiating the surface 21a with ions, an electrostatic latent image is once formed on the electrostatic latent image carrier 12, and the recording medium 20 is electrostatically developed with the electrostatic latent image to form a visible image. It is.
  • a voltage applying unit 22 may be provided on the back surface of the recording medium 20 instead of the ground electrode unit 22a to apply a voltage.
  • the combination of the head substrate 2, the heating unit 6, and the optical fiber 6b has been described as the heat discharge type print head lb.
  • the head substrate 2a according to the first and second embodiments is described. , 2b, or 2c may be used.
  • Heat-discharge type print head An electrostatic latent image is formed on the surface of the electrostatic latent image carrier 12 by irradiation of ions from lb, and the recording medium 20 is electrostatically developed with the electrostatic latent image to be visible. An image can be formed, and the heat discharge type print head lb and the recording medium 20 do not directly face each other, and the heat discharge type print head lb can be prevented from being stained.
  • an electrostatic latent image can be formed in only one step of ion irradiation, and the image forming process can be simplified.
  • FIG. 9 is a schematic diagram of a main part showing the configuration of the image forming apparatus according to the seventh embodiment.
  • 10c is an image forming apparatus according to Embodiment 7 provided with a heat discharge type print head 1
  • 15 is an electrostatic latent image formed on the surface by irradiation of ions from the heat discharge type print head 1.
  • the electrostatic latent image carrier 16 is a developing unit as a visualization means for forming a visible image on the surface of the electrostatic latent image carrier 15 based on the electrostatic latent image
  • 17 is a visible image printed.
  • the developing device 16 that performs toner development is used as the developing means, but the development may be performed by ink or other methods.
  • the transfer fixing roller 17 a roller made of a metal such as aluminum and coated with a synthetic rubber such as silicone rubber was used. Toner When a pressure fixing type toner is used during development, the toner is pressed by the transfer fixing roller 17 to transfer and fix the visible image on the surface 25 of the print medium 25.
  • an electrostatic latent image can be formed on the surface of the electrostatic latent image carrier 15 in a stable state, and the reliability is excellent.
  • the electrostatic latent image carrier 15 may be the same as the electrostatic latent image carrier 12 in the sixth embodiment.
  • the surface of the electrostatic latent image carrier 15 is neutralized by the static eliminator 19.
  • the neutralization is performed by corona discharge, for example.
  • the surface of the electrostatic latent image carrier 15 is exposed by irradiating the electrostatic latent image carrier 15 that has been electrically cleaned and the afterimage of the electrostatic latent image has disappeared with negative ions from the heat-discharge type print head 1.
  • a negative electrostatic latent image is formed at The electrostatic latent image is developed by the developing device 16 and becomes a visible image. The visible image is pressed by the transfer fixing roller 17 and transferred and fixed on the surface 25 of the print medium 25.
  • the heat discharge type print heads la and lb described in the fifth and sixth embodiments are used. Combinations may be used.
  • the image forming apparatus of the seventh embodiment Since the image forming apparatus of the seventh embodiment is configured as described above, it has the following operations.
  • Electrostatic latent image is formed on the surface by the irradiation of ions from the heat-discharge type print head 1
  • an exposure optical system such as a polygon mirror is not required, so the number of parts is small and the structure can be simplified.
  • the developing device 16 that is a visualization means can form a visible image on the surface of the electrostatic latent image carrier 15 based on the electrostatic latent image, and the visible image can be printed on the printing medium by the transfer means. Since it can be transferred to the 25 surface 25a, various media such as plain paper, OHP sheets, glossy paper, etc. can be used as the print medium 41, which is excellent in versatility.
  • the present invention can easily and reliably control the discharge of the discharge electrode force, simplify the structure, and have excellent mass productivity and reliability. No restrictions on manufacturing with respect to the shape and arrangement of the discharge electrode Excellent design flexibility, easy high-density mounting to improve image resolution and recording speed High quality and practicality
  • a heat-discharge type print head an image can be formed on a recording medium such as a digital paper by irradiating and emitting ions by discharge.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Facsimile Heads (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)

Abstract

La présente invention concerne une tête d'impression de type à décharge de chaleur de grande qualité et à excellente possibilité de mise en oeuvre dans laquelle: la décharge des électrodes de décharge peut être commandée de manière simple et infaillible par chauffage sélectif d'électrodes de décharge à l'aide d'une unité chauffante prévue à part des électrodes de décharge; une configuration simplifiée permet d'obtenir une excellente productivité de masse et une excellente fiabilité; la conception est hautement flexible sans restrictions de fabrication quant à la forme et l'agencement des électrodes de décharge; et la résolution de l'image et la vitesse d'enregistrement peuvent être améliorées avec la facilité de montage haute densité. La tête d'impression de type à décharge de chaleur qui commande la décharge des électrodes de décharge en commandant la température des électrodes de décharge sur lesquelles une tension de commande de décharge est appliquée comprend une unité de décharge comportant les électrodes de décharge et une unité chauffante qui est prévue à part de l'unité de décharge et qui chauffe les électrodes de décharge.
PCT/JP2005/020138 2005-11-01 2005-11-01 Tete d'impression de type a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression WO2007052340A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2005/020138 WO2007052340A1 (fr) 2005-11-01 2005-11-01 Tete d'impression de type a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression
JP2007524119A JPWO2007052620A1 (ja) 2005-11-01 2006-10-31 加熱放電型印字ヘッド及びそれを備えた画像形成装置
PCT/JP2006/321687 WO2007052620A1 (fr) 2005-11-01 2006-10-31 Tete d'impression a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression

Applications Claiming Priority (1)

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PCT/JP2005/020138 WO2007052340A1 (fr) 2005-11-01 2005-11-01 Tete d'impression de type a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression

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PCT/JP2006/321687 WO2007052620A1 (fr) 2005-11-01 2006-10-31 Tete d'impression a decharge de chaleur et dispositif de formation d'images comprenant cette tete d'impression

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JP2008307788A (ja) * 2007-06-14 2008-12-25 Fukuoka Technoken Kogyo:Kk イオン発生制御方法と加熱放電型印字ヘッド及びそれを備えた画像形成装置
CN110459136A (zh) * 2019-08-29 2019-11-15 上海天马微电子有限公司 一种显示面板及显示装置

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JPH07225510A (ja) * 1994-02-15 1995-08-22 Ricoh Co Ltd 表面電位形成方法及びそれを用いた記録方法
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JPS63305188A (ja) * 1987-06-06 1988-12-13 Sony Corp 表示材料
JPS6424764A (en) * 1987-07-21 1989-01-26 Nippon Telegraph & Telephone Superconductive multineedle electrode
JPH07225510A (ja) * 1994-02-15 1995-08-22 Ricoh Co Ltd 表面電位形成方法及びそれを用いた記録方法
JPH0872292A (ja) * 1994-09-09 1996-03-19 Alps Electric Co Ltd イオン書込みヘッド
JP2003326756A (ja) * 2002-05-13 2003-11-19 Fukuoka Technoken Kogyo:Kk イオン発生装置

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Publication number Priority date Publication date Assignee Title
JP2008307788A (ja) * 2007-06-14 2008-12-25 Fukuoka Technoken Kogyo:Kk イオン発生制御方法と加熱放電型印字ヘッド及びそれを備えた画像形成装置
CN110459136A (zh) * 2019-08-29 2019-11-15 上海天马微电子有限公司 一种显示面板及显示装置

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