EP0629508A2 - Tête d'enregistrement à LED régulée en température - Google Patents

Tête d'enregistrement à LED régulée en température Download PDF

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Publication number
EP0629508A2
EP0629508A2 EP19940304265 EP94304265A EP0629508A2 EP 0629508 A2 EP0629508 A2 EP 0629508A2 EP 19940304265 EP19940304265 EP 19940304265 EP 94304265 A EP94304265 A EP 94304265A EP 0629508 A2 EP0629508 A2 EP 0629508A2
Authority
EP
European Patent Office
Prior art keywords
carrier bar
cooling
recording head
thermally conductive
leds
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19940304265
Other languages
German (de)
English (en)
Other versions
EP0629508B1 (fr
EP0629508A3 (en
Inventor
Etienne Marie De Cock
Lucien Amedé De Schamphelaere
Alfons Jakob Grobben
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xeikon NV
Original Assignee
Xeikon NV
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 Xeikon NV filed Critical Xeikon NV
Priority to EP19940304265 priority Critical patent/EP0629508B1/fr
Publication of EP0629508A2 publication Critical patent/EP0629508A2/fr
Publication of EP0629508A3 publication Critical patent/EP0629508A3/xx
Application granted granted Critical
Publication of EP0629508B1 publication Critical patent/EP0629508B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/377—Cooling or ventilating arrangements
    • 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
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
    • B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
    • 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
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
    • B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
    • B41J2/451—Special optical means therefor, e.g. lenses, mirrors, focusing means

Definitions

  • the present invention is concerned with a temperature-conditioned LED recording head comprising light emitting diodes (LEDs) and an electrophotographic printer containing one or more of such recording heads for image-wise exposure of photoconductive member(s) of the printer.
  • LEDs light emitting diodes
  • Reversal development is a “positive-negative” or vice versa development process and is of particular interest when the exposure derives from an image in digital electrical form, wherein the electrical signals modulate a laser beam or the light output of light-emitting diodes (LEDs). It is advantageous with respect to a reduced load of the electrical signal modulated light source (laser or LEDs) to record graphic information (e.g. printed text) in such a way that the light information corresponds with the graphic characters so that by "reversal" development in the exposed area of a photoconductive recording layer, toner can be deposited to produce a positive reproduction of the electronically stored original. In high speed electrophotographic printing the exposure derives practically always from electronically stored, e.g. computer stored, information.
  • electronically stored e.g. computer stored, information.
  • multi-colour printers that produce a plurality of colour toner images on a photoconductive drum or endless belt wherefrom the toner images are transferred directly onto printing stock material such as a paper sheet or paper web material.
  • the toner images formed on a photoconductive recording member are transferred subsequently to an intermediate insulating belt from distinct image forming stations and are then transferred simultaneously to a receiving sheet or web that eventually is cut into sheets containing a desired printing frame dimension.
  • LED arrays at the exposure station of electrophotographic printers the light from the LEDs being focused by an optical system, e.g. by a rod-like lens array, onto the photoconductive drum or belt, taking advantage of the fact that LED exposure stations have no moving parts and that no complicated optics are required, such as is the case in laser printers.
  • LED arrays has a particular advantage over the application of image-wise modulated scanning laser beams in that positional accuracy, especially important in multi-station printers where two or more images have to be imposed in exact registration, is easier to achieve.
  • LED arrays are available at a sufficiently high packing density, say 600 and even more LEDs per inch, so that the necessary conditions for high resolution printing are fulfilled.
  • LED image bars Details about the construction of LED image bars are given in the book "Imaging Processes and Materials” Neblette's Eight Edition - Edited by John Sturge et al., Van Nostrand Reinhold - New York (1989), 388-390 and in United States patent US 5177500 (Eastman Kodak Company).
  • Light emitting diodes emit electromagnetic radiation at particular wavelengths as a direct conversion of electrical energy. This radiation depends on the chemical composition of the host crystal and the dopant(s).
  • LED image bars containing linear arrays of light emitting diodes arranged in single or staggered rows in multi-colour high speed multiple-station electrophotographic printers incorporating yellow, magenta, cyan and black printing stations require very accurate registration of the monochrome images in order to form according to the principles of subtractive colour mixing a high quality full colour image.
  • This high accuracy depends largely on a correct positioning of the individual LEDs in each imaging bar but also on the positioning of the image bars with respect to each other and with respect to their optical system. Since the LEDs of an individual imaging bar are mounted on a common carrier bar made of metal any varying thermal deformation, e.g. linear expansion or contraction, of the spatially adjusted LED image bars has to be avoided since otherwise mis-registration of the different monochrome images will take place.
  • each LED print bar By passing the cooling medium through each LED print bar from one end thereof to the other, the temperature difference between a given LED and the adjacent cooling medium will depend upon the position of the LED along the print bar. Therefore a variable cooling effect is achieved with the result that the temperature may not be the same along the print bar. A variable temperature may result in a variation in LED light output, and consequently a lack of uniformity of image density.
  • a recording head comprising a linear array of light-emitting diodes (LEDs) on a common thermally conductive LED carrier bar which carries a series of modules, each module containing N LEDs with their associated drivers, said carrier bar being associated with cooling means in thermally conductive contact therewith, said cooling means comprising a U-shaped duct inside a thermally conductive body in thermally conductive contact with said carrier bar, said duct extending between a fluid inlet and a fluid outlet for allowing the flow of a cooling fluid therethrough.
  • LEDs light-emitting diodes
  • an electrophotographic printer comprising in an image-producing station a recording head comprising a linear array of light-emitting diodes (LEDs) on a common thermally conductive LED carrier bar which carries a series of modules, each module containing N LEDs with their associated drivers, said carrier bar being associated with cooling means in thermally conductive contact therewith, said cooling means comprising a U-shaped duct inside a thermally conductive body in thermally conductive contact with said carrier bar, said duct extending between a fluid inlet and a fluid outlet for allowing the flow of a cooling fluid therethrough.
  • LEDs light-emitting diodes
  • the material of which said carrier bar and/or the cooling body is comprised is a metal, most preferably selected from copper, brass, aluminium and mixtures thereof.
  • the light emitting faces of the LEDs are in light-focusing association with a rod lens array.
  • Either said LED carrier bar and said cooling body are separate parts which can be secured together in such a manner as to be capable of being dismounted from each other, or the cooling body and the carrier bar are formed in one piece.
  • the cooling fluid will generally be a liquid such as water for reasons of cost and convenience, but other cooling liquids may be used if desired.
  • the recording head according to the invention is of particularly advantageous use in a multiple-station electrophotographic printer comprising a plurality of image-producing stations, each including a recording head.
  • a closed cooling circuit for the temperature control of the recording heads comprising a cooling fluid reservoir, a heat exchanger for removing excess heat from the cooling fluid, a pump and associated pipe-work to feed the cooling fluid to the ducts of the recording heads, either in series or in parallel.
  • each printing station comprises a cylindrical drum 24 having a photoconductive outer surface 26.
  • a main corotron or scorotron charging device 28 capable of uniformly charging the drum surface 26, for example to a potential of -600 V
  • an LED image bar 30 provided with a cooling block 50 having an inlet and outlet (shown by arrows) for a cooling liquid.
  • the LEDs being arranged in a linear array are electrically energized to image-wise line-after-line expose the photoconductive drum surface 26 causing the charge thereon to be selectively reduced.
  • the potential in the exposed areas is reduced to about -250 V, leaving an image-wise distribution of electric charge to remain on the drum surface 26.
  • This so-called "latent image” is rendered visible on passing a development station 32 which by means known in the art brings an electrostatographic developer in contact with the drum surface 26.
  • the development station 32 includes a developer drum 33 forming a so-called magnetic brush.
  • the developer contains (i) toner particles containing a mixture of resin, a dye or pigment of the appropriate colour and normally also a charge-controlling agent defining the triboelectric charge polarity, and (ii) carrier particles charging the toner particles by frictional contact therewith.
  • the carrier particles may be made of magnetizable material, such as iron or iron oxide.
  • the developer drum 33 contains magnets carried within a rotating sleeve causing the mixture of toner and magnetizable material to rotate therewith, to contact the surface 26 of the drum 24 in a brush-like manner.
  • the toner image adhering to the drum surface 26 is transferred to the moving web 12 by a transfer corona device 34.
  • the moving web is in face-to-face contact with the drum surface 26 over a wrapping angle ⁇ of about 15° determined by the position of the guiding rollers 36.
  • the charge sprayed by the transfer corona device being opposite of the side of the web to the drum, and having a polarity opposite in sign to that of the charge of the toner particles, attracts the toner particles away from the drum surface 26 and onto the surface of the web 12.
  • the adherent force created by the charge sprayed by the transfer corona device and the tensioning of the web 12 in contact with the drum surface 26 using a drive roller and brake (shown in Figure 4) and the guiding rollers 36 defining the wrapping angle make that the drum surface moves in synchronism with the movement of the web and is actually driven thereby.
  • the web should not tend to wrap around the drum beyond the point dictated by the positioning of a guide roller 36 and there is provided circumferentially beyond the transfer corona device 34 a web discharge corona device 38 driven by alternating current and serving to discharge the web 12 and thereby allow the web to become released from the drum surface 26.
  • the web discharge corona device 38 also serves to eliminate sparking as the web leaves the surface 26 of the drum.
  • the drum surface 26 is pre-charged to a level of, for example -580 V, by a pre-charging corotron or scorotron device 48.
  • the pre-charging makes the final charging by the corona 28 much easier.
  • any residual toner which might still cling to the drum surface may be more easily removed by a cleaning unit 42 known in the art.
  • the cleaning unit 42 includes an adjustably mounted cleaning brush 43, the position of which can be adjusted towards or away from the drum surface 26 to ensure optimum cleaning.
  • the cleaning brush 43 is earthed or subject to such a potential with respect to the drum as to attract the residual toner particles away from the drum surface. After cleaning, the drum surface is ready for another recording cycle.
  • element 50 is a cooling body (block), preferably made of a thermally conductive metal e.g. copper, brass or aluminium.
  • the cooling block 50 contains an U-shaped duct or channel 57, having an upper arm 40 and a lower arm 41.
  • the channel 57 may be formed by casting the block 50 lengthwise in two parts and joining them with a thermoconductive glue to form the duct 57 having an inlet and outlet to allow the entry and exit of liquid into and from the duct 57.
  • the block 50 is assembled with a common LED carrier bar 30 carrying a linear array of a series of modules (not shown in the drawing) each module containing N LEDs, where N is a whole number, with their associated drivers carried by a module carrier.
  • Typical modules contain 64, 128 or 256 LEDs.
  • the LED carrier bar is preferably also made of a thermally conductive metal e.g. copper, brass or aluminium.
  • the light emitting faces of the LEDs are in light-focusing relationship associated with a rod lens array 59 (see. e.g. United States patent 4905021) which rod lenses are sold under the tradename "SELFOC" of the Nippon Sheet Glass Co.
  • the rod lenses have a graded refractive index profile, (see “Fibre Optics Handbook” by Christian Hentschel, Hewlett-Packard GmbH, Boeblingen Instruments Division, Germany March 1989, p. 197-198).
  • Figure 3 shows a cross-sectional view of an LED print head containing a cooling block 50.
  • element 61 represents one of the LEDs of the array.
  • Elements 62 and 63 are drivers associated with the LEDs and symmetrically mounted on module carriers as defined above carried by the common carrier bar 30.
  • Interconnection Printed Circuit Boards (PCBs) 65 and 66 respectively are mounted on the same carrier bar 30.
  • a "SELFOC" (trade-name) array of auto-focusing fibres 67 Co-extending with the linear LED array formed by a series of LEDs 61 there is provided a "SELFOC" (trade-name) array of auto-focusing fibres 67.
  • the focusing of the light emitted by the LEDs 61 onto the photoconductive drum surface 26 is represented by dashed lines in the drawing.
  • a cap 68 for fixedly mounting the array of auto-focusing fibres 67 to the LED carrier bar 30 is provided and the cap 68 is fixed by means of screws 69.
  • the cooling body 50 fixed by screws or thermally conductive glue to the carrier bar 30 has arms 40 and 41 respectively of the U-shaped duct for the passage of a cooling liquid.
  • the cooling body remains fixedly arranged in the printer and serves as a kind of positioning-template for the LED image bar which is mounted thereon in registration position.
  • cooling body 50 and the LED carrier bar 30 may be formed in one piece.
  • cooling liquids may serve the purpose, water is used preferably.
  • FIG 4 represents schematically an electrophotographic single pass multiple-station printer 10 according to the present invention comprising in each printing station (A, B, C and D) a liquid-cooled LED image bar. As shown the cooling liquid is flowing in a closed circuit 56 comprising the cooling blocks 50 of successive LED image bars connected in series.
  • element 53 is a pump
  • element 54 a liquid reservoir
  • element 55 is a heat-exchanger including a temperature-controllable refrigerator device.
  • image-producing stations A, B, C and D are arranged in a substantially vertical configuration, although it is of course possible to arrange the stations in a horizontal or other fashion.
  • a web 12 of paper unwound from a supply roller 14 is conveyed in upwards direction past the printing stations in turn.
  • the moving web 12 is in face-to-face contact with the drum surface 26 over a wrapping angle ⁇ of about 15° (see Figure 1) determined by the position of the guiding rollers 36.
  • the web of paper 12 passes through a toner image-fixing station 16, and an optional cooling zone 18 and thence to a cutting station 20 to cut the web into sheets.
  • the web 12 is conveyed through the printer by a motor-driven roller 22 and tension in the web is generated by the application of a brake 11 acting upon the supply roller 14.
  • a flow rate of 3 l per minute of water is sufficient.
  • the temperature of the water entering the cooling block(s) is preferably about 30°C and that temperature is preferably kept constant within a margin not larger than 2 C°.
  • the cooling provided by the cooling liquid within one LED carrier bar is suitably such that the temperature gradient within said bar is preferably at most 1 C°.
  • the difference in temperature of the LEDs of one carrier bar with respect to another LED carrier bar of a multiple-station printer is suitably kept within a temperature range not larger than 2 C°. Where four carrier bars are connected in series, we have found for example that a cooling medium flow rate of 3 litres per minute is sufficient to enable the temperature difference between the bars to be kept within 2 C°.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
EP19940304265 1993-06-18 1994-06-13 Tête d'enregistrement à LED régulée en température Expired - Lifetime EP0629508B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19940304265 EP0629508B1 (fr) 1993-06-18 1994-06-13 Tête d'enregistrement à LED régulée en température

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP93304770 1993-06-18
EP93304770 1993-06-18
EP19940304265 EP0629508B1 (fr) 1993-06-18 1994-06-13 Tête d'enregistrement à LED régulée en température

Publications (3)

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EP0629508A2 true EP0629508A2 (fr) 1994-12-21
EP0629508A3 EP0629508A3 (en) 1995-01-11
EP0629508B1 EP0629508B1 (fr) 1996-10-09

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736390A2 (fr) * 1995-04-03 1996-10-09 Canon Kabushiki Kaisha Réglage de température pour un dispositif d'impression
WO1996037862A1 (fr) * 1995-05-22 1996-11-28 OCé PRINTING SYSTEMS GMBH Generateur de caracteres optique pour appareil d'impression ou de copie electrographique
DE19612642C1 (de) * 1996-03-29 1997-07-17 Oce Printing Systems Gmbh Elektrografischer Drucker mit mehreren Zeichengeneratoren
WO1997036212A1 (fr) * 1996-03-27 1997-10-02 Oce Printing Systems Gmbh Generateur de caracteres electro-optique
DE19612640C1 (de) * 1996-03-29 1997-10-23 Oce Printing Systems Gmbh Elektrooptischer Zeichengenerator
EP0819545A2 (fr) * 1996-07-15 1998-01-21 Canon Kabushiki Kaisha Appareil d'impression par jet d'encre
US6113212A (en) * 1998-04-16 2000-09-05 Eastman Kodak Company Method and apparatus for thermal control of LED printheads
US7180252B2 (en) 1997-12-17 2007-02-20 Color Kinetics Incorporated Geometric panel lighting apparatus and methods
US7358929B2 (en) 2001-09-17 2008-04-15 Philips Solid-State Lighting Solutions, Inc. Tile lighting methods and systems
US8368735B2 (en) 2007-09-14 2013-02-05 Xeikon Manufacturing N.V. Light emitting array for printing or copying
WO2013114131A1 (fr) * 2012-02-01 2013-08-08 Lumejet Holdings Limited Dispositif de rayonnement et dispositif d'exposition de supports de données
CN103383873A (zh) * 2013-06-27 2013-11-06 中国科学院等离子体物理研究所 大功率整流电源水冷交变电流传输器
CN106604827A (zh) * 2014-08-21 2017-04-26 气动系统股份有限公司 用于直接led照射紫外线的装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10319526A1 (de) * 2003-04-30 2004-07-29 OCé PRINTING SYSTEMS GMBH Kühleinrichtung für ein elektronische und/oder optische Bauelemente aufweisendes Bauteil

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US4721996A (en) * 1986-10-14 1988-01-26 Unisys Corporation Spring loaded module for cooling integrated circuit packages directly with a liquid
US4821051A (en) * 1988-09-01 1989-04-11 Eastman Kodak Company Optical printhead having thermal expansion stress relief
DE3822890A1 (de) * 1988-03-15 1989-09-28 Siemens Ag Kuehlanordnung fuer einen optischen zeichengenerator
EP0464948A1 (fr) * 1990-07-03 1992-01-08 Agfa-Gevaert N.V. Tête d'exposition à diode luminescente à circuits électriques chevauchants.
WO1992017745A1 (fr) * 1991-04-02 1992-10-15 Microunity Systems Engineering, Inc. Echangeur de chaleur pour dispositifs electroniques a semi-conducteurs
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DE3822890A1 (de) * 1988-03-15 1989-09-28 Siemens Ag Kuehlanordnung fuer einen optischen zeichengenerator
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EP0464948A1 (fr) * 1990-07-03 1992-01-08 Agfa-Gevaert N.V. Tête d'exposition à diode luminescente à circuits électriques chevauchants.
WO1992017745A1 (fr) * 1991-04-02 1992-10-15 Microunity Systems Engineering, Inc. Echangeur de chaleur pour dispositifs electroniques a semi-conducteurs
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6074035A (en) * 1995-04-03 2000-06-13 Canon Kabushiki Kaisha Printing apparatus
EP0736390A2 (fr) * 1995-04-03 1996-10-09 Canon Kabushiki Kaisha Réglage de température pour un dispositif d'impression
EP0736390A3 (fr) * 1995-04-03 1998-01-07 Canon Kabushiki Kaisha Réglage de température pour un dispositif d'impression
US6097419A (en) * 1995-05-22 2000-08-01 Oce Printing Systems Gmbh Optical character generator for an electrographic printer or copier device
WO1996037862A1 (fr) * 1995-05-22 1996-11-28 OCé PRINTING SYSTEMS GMBH Generateur de caracteres optique pour appareil d'impression ou de copie electrographique
DE19612174A1 (de) * 1996-03-27 1997-10-02 Oce Printing Systems Gmbh Elektrooptischer Zeichengenerator
WO1997036212A1 (fr) * 1996-03-27 1997-10-02 Oce Printing Systems Gmbh Generateur de caracteres electro-optique
US6121995A (en) * 1996-03-27 2000-09-19 Oce Printing Systems Gmbh Cooling arrangement for electro-optical character generator
DE19612174C2 (de) * 1996-03-27 1998-04-09 Oce Printing Systems Gmbh Elektrooptischer Zeichengenerator
DE19612640C1 (de) * 1996-03-29 1997-10-23 Oce Printing Systems Gmbh Elektrooptischer Zeichengenerator
BE1011442A4 (fr) * 1996-03-29 1999-09-07 Oce Printing Systems Gmbh Generateur de caracteres electro-optiques.
BE1011441A4 (fr) * 1996-03-29 1999-09-07 Oce Printing Systems Gmbh Imprimante electrographique equipee de plusieurs generateurs de caracteres.
DE19612642C1 (de) * 1996-03-29 1997-07-17 Oce Printing Systems Gmbh Elektrografischer Drucker mit mehreren Zeichengeneratoren
EP0819545A3 (fr) * 1996-07-15 1999-05-06 Canon Kabushiki Kaisha Appareil d'impression par jet d'encre
EP0819545A2 (fr) * 1996-07-15 1998-01-21 Canon Kabushiki Kaisha Appareil d'impression par jet d'encre
US6174055B1 (en) 1996-07-15 2001-01-16 Canon Kabushiki Kaisha Ink jet printing apparatus
US7180252B2 (en) 1997-12-17 2007-02-20 Color Kinetics Incorporated Geometric panel lighting apparatus and methods
US6113212A (en) * 1998-04-16 2000-09-05 Eastman Kodak Company Method and apparatus for thermal control of LED printheads
US7358929B2 (en) 2001-09-17 2008-04-15 Philips Solid-State Lighting Solutions, Inc. Tile lighting methods and systems
US8368735B2 (en) 2007-09-14 2013-02-05 Xeikon Manufacturing N.V. Light emitting array for printing or copying
WO2013114131A1 (fr) * 2012-02-01 2013-08-08 Lumejet Holdings Limited Dispositif de rayonnement et dispositif d'exposition de supports de données
US9823569B2 (en) 2012-02-01 2017-11-21 Lumejet Holdings Limited Radiating device and media exposure device
CN103383873A (zh) * 2013-06-27 2013-11-06 中国科学院等离子体物理研究所 大功率整流电源水冷交变电流传输器
CN103383873B (zh) * 2013-06-27 2016-02-17 中国科学院等离子体物理研究所 大功率整流电源水冷交变电流传输器
CN106604827A (zh) * 2014-08-21 2017-04-26 气动系统股份有限公司 用于直接led照射紫外线的装置

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Publication number Publication date
EP0629508B1 (fr) 1996-10-09
EP0629508A3 (en) 1995-01-11

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