EP2844474B1 - Leuchte mit reflektor - Google Patents

Leuchte mit reflektor Download PDF

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Publication number
EP2844474B1
EP2844474B1 EP13714847.4A EP13714847A EP2844474B1 EP 2844474 B1 EP2844474 B1 EP 2844474B1 EP 13714847 A EP13714847 A EP 13714847A EP 2844474 B1 EP2844474 B1 EP 2844474B1
Authority
EP
European Patent Office
Prior art keywords
lamp according
leds
lamp
module
light
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.)
Not-in-force
Application number
EP13714847.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2844474A1 (de
Inventor
Susanne Schadt
Michael Peil
Harald Maiweg
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.)
Heraeus Noblelight GmbH
Original Assignee
Heraeus Noblelight GmbH
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 Heraeus Noblelight GmbH filed Critical Heraeus Noblelight GmbH
Priority to SI201330342A priority Critical patent/SI2844474T1/sl
Publication of EP2844474A1 publication Critical patent/EP2844474A1/de
Application granted granted Critical
Publication of EP2844474B1 publication Critical patent/EP2844474B1/de
Priority to HRP20161336TT priority patent/HRP20161336T1/hr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/56—Cooling arrangements using liquid coolants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Definitions

  • the invention relates to a luminaire, comprising a first module and at least one second module, each having a plurality of distributed over a module surface LEDs, the modules are arranged to dissipate heat loss on at least one heat sink, and a reflector, wherein radiated from one of the modules Light is deflected by the reflector in an outlet opening of the lamp.
  • EP 2 375 133 A2 describes a lamp with an air-cooled heat sink, in which two LED modules are arranged opposite one another. The light from the two LED modules is filtered through collimators mounted individually on the LEDS and deflected by two deflecting mirrors through 90 ° into a common exit direction. The light leaving the light is completely divergent.
  • EP 2 284 006 A2 describes a light source for UV drying with bundled leaving light.
  • a large opening angle of the individual LEDs can be bundled into the structure of the target surface.
  • a high degree of flexibility in terms of shape and size of the luminaire is achieved by the deflection of the light by means of the reflector.
  • an installation position and size of the heat sink or the heat sink can be selected so that a height of the lamp is reduced in the exit direction of the light.
  • the exit direction is understood to be the geometric main direction of the light after the deflection and when leaving the exit opening.
  • the light from a plurality of differently arranged and / or radiating in different main directions modules in the same exit direction from the light can be deflected, for example, each 90 °
  • each object located in the beam path to understand by means of which a defined change in the propagation direction of the geometric light beams is achieved.
  • these are for the beam path permeable lenses, including cylindrical lenses and Fresnel lenses.
  • it can also be defined curved reflectors.
  • the optics comprises a primary optics for focusing the radiated light, which is arranged directly on the LEDs.
  • a primary optic makes it possible to transport a particularly large solid angle of the light which is usually emitted by the LEDs over a large angle.
  • these may be a plurality of collecting lenses each arranged above an LED.
  • the primary optics is formed as a transparent polymer layer applied to the modules, which integrally engages over at least a plurality of LEDs.
  • a polymer layer may be, for example, by the type of in WO 2012/031703 A1 be formed optics described.
  • an LED module is coated by means of an open mold with a UV-resistant silicone.
  • the optics comprises a secondary optic, which is arranged spatially separated from a module in a beam path of the light.
  • secondary optics in contrast to the concept of primary optics, secondary optics in the present case are generally understood to mean optics that are not seated directly on the LEDs. Embodiments are therefore possible which include secondary optics but no primary optics.
  • both a primary optic and a secondary optics are arranged in the beam path of the luminaire, resulting in a particularly small design with high illuminance.
  • the secondary optics is formed as a transparent polymer layer on a transparent substrate.
  • the secondary optics can be classified according to the type of WO 2012/031703 A1 described optics, wherein instead of an LED module, a transparent substrate, for example glass, is coated by means of an open mold with a UV-resistant silicone.
  • the optic comprises at least one cylindrical lens, by means of which the light of a plurality of LEDs arranged in a row is bundled.
  • a cylindrical lens may be formed, in particular, in a secondary optic arranged at a distance from the LEDs.
  • the defined structure is formed as a straight line.
  • the luminaire is parallel to the line in a longitudinal direction and has in this direction a length which is at least twice, preferably at least three times, a height of the luminaire in a vertical direction perpendicular to the longitudinal direction.
  • the reflector relative to the LED module arranged at an angle between 30 ° and 60 °.
  • the angle may be about 45 °, so that a total of a deflection of the light rays by about 90 °. which favors a low height of the lamp.
  • the angled arrangement of the reflector refers in the context of the invention to a deflection of a main beam of the light beam by twice the angle. In this sense, not only flat, but also curved reflectors are arranged at a certain angle.
  • the luminaire is preferably designed so that an irradiance on the structure is at least 2 W / cm 2 . This allows in particular the use for drying applications such as paint drying with UV light as part of a printing process.
  • At least 50% of the light emitted by the LEDs is present in a wavelength range of less than 470 nm.
  • the IR radiator can be flexibly installed in a technical device, for example a printing press.
  • the lacquers or inks of printing presses are dried by UV light, in which case crosslinking of the substance to be dried usually takes place, or else by heat, with IR emitters preferably being used.
  • an amount of heat emitted to the cooling body is absorbed via a liquid coolant, so that overall a particularly large amount of waste heat can be dissipated even in the case of unfavorable installation conditions of the luminaire.
  • Liquid coolants have a higher heat capacity than gaseous ones and allow high cooling capacities. The removal can be done by shifting the coolant in the liquid phase, for example by means of a circulating cooling circuit. It may alternatively or additionally also be the use of heat pipes, in which heat absorption first leads to a phase change of the liquid coolant.
  • the object of the invention is also achieved by a device for drying a coating, comprising a luminaire according to the invention.
  • the luminaire according to the invention is particularly well suited for this purpose, since it combines high irradiation intensities with a flexible and, in particular, compact design.
  • a planar substrate with the coating to be dried and the luminaire are movable relative to one another in a conveying direction, wherein the luminaire extends in a transverse direction at least partially over a width of the substrate and is arranged at a defined distance above the substrate.
  • the substrate may be a printed product that is coated in a printing press with printed paint or other substance.
  • the object of the invention is also achieved by the use of a luminaire according to the invention for drying a coating, preferably in a printing process.
  • a luminaire according to the invention Fig. 1 comprises two LED modules 1, wherein each of the modules 1 is applied to a heat sink 2 in a flat, thermally conductive connection.
  • the modules 1 each comprise a plurality of LEDs 3, which are distributed in a grid over a plane perpendicular to the plane of the module surface.
  • the LEDs 3 are applied together with other electronic components (not shown) on a planar support 4, whereby a total of one chip on-board module (COB) is formed in each case.
  • COB chip on-board module
  • the modules 1 extend in a direction perpendicular to the plane of the drawing longitudinal direction and in a vertical direction, in the drawing Fig. 1 from top to bottom and corresponds to an exit direction of the lamp.
  • a main emission direction of the LEDs thus corresponds to a transverse direction, which in the drawing Fig. 1 from left to right.
  • the equipped with LEDs sides of the modules 1 are opposite, with a reflector 5 is disposed between the modules.
  • the reflector 5 comprises two reflector surfaces 5a, 5b, wherein each of the reflector surfaces is planar and is inclined at an angle of 45 ° to the plane of the respective opposite module.
  • a light beam emanating from an LED below 90 ° to the respective module plane (main emission direction) is deflected by the respective reflector surface 5a, 5b at an angle of 90 ° and leaves the luminaire through an exit opening 6 in an exit direction parallel to the vertical direction.
  • the design of the reflector can be arbitrary, for example, as a prism, as a glass mirror or mirror plate. In order to minimize losses, in each case a corresponding surface compensation can be present.
  • a primary optics 8 is arranged, which in the present case is designed as a full-area coating of the modules 1.
  • the primary optics has directly on the individual LEDs 3 in each case lenses 9, by means of which a large opening angle of the emitted light bundled and the deflection by the reflector 5 on a target surface 10 (see illustration and analogous beam paths in Fig. 2 ).
  • a predominant concentration of the rays into a structure takes place in the form of a straight, longitudinally extending line in the target surface 10.
  • the irradiation intensity through the luminaire is significantly more than 2 W / cm 2 .
  • the outlet opening 6 is covered by a transparent protective screen 7, which in the present case has no distracting effect on the beam path.
  • the protective screen may be formed as part of the optics.
  • the heat sink 2 each have connections 2a for the inlet and outlet of a liquid coolant, which flows through the heat sink for the removal of heat.
  • the coolant can be in a closed circuit and release the heat elsewhere through a heat exchanger. In the present luminaire dissipated heat outputs in the range of much more than 1 kW.
  • the second embodiment according to Fig. 2 differs from the first example in that in addition to the primary optics 8.
  • a secondary optics 11 is provided in front of the modules, whereby the bundling of the largest possible exit angle from the LEDs in the structure on the target surface is further improved.
  • the primary optics 8 according to the combined effect with the secondary optics may have a different interpretation, for example, in terms of size and focal lengths of the lenses 9 than in the first example, but otherwise constructed on the same principle.
  • the secondary optics 11 are each spaced in front of one of the modules 1, but arranged between the module 1 and the respective reflector plane 5a, 5b to act as early as possible bundling on the beam path.
  • the secondary optics each include a plurality of parallel cylindrical lenses 12 extended in the longitudinal direction.
  • the light of at least one row of LEDs is detected by one of the cylindrical lenses 12 and bundled into the line or structure of the target surface 10 (printed product).
  • Exemplary are in Fig. 2 Three different light beams are drawn by three LEDs, each with a different beam angle, all of which are focused into the structure in the target area.
  • the primary optics are according to one in the WO 2012/031703 A1 prepared in principle by the COB modules are coated by silicone in an open mold.
  • the present secondary optics are produced by an analogous method in which, instead of the COB modules, a transparent, flat substrate 13 is coated with UV-resistant silicone in order to produce the optically active structures 12 (cylindrical lenses).
  • a lamp according to the embodiments described above is used for purposes of UV drying of paint or ink in a printing press, in this case offset sheet-fed press.
  • An extension of the luminaire in the longitudinal direction is typically more than 1 meter, in the present example 1.6 meters, which corresponds to the sheet width of the printed product.
  • several modules 1 and optics 8 are typically arranged one behind the other in the longitudinal direction.
  • the components of the luminaire described above are accommodated in a housing 14 which is optimized with respect to the construction space.
  • An irradiance on the target plane with respect to the longitudinal direction is presently about 10 watts per cm.
  • the majority of the light is in the range of a wavelength of less than 470 nm.
  • LED luminaires with very high optical output powers 0.1-200 mm 2 , typically 1-2 mm 2 LEDs are built in the chip-on-board (COB) method. In doing so, who several LEDs, typically 4-200 chips, are assembled into a module on a common substrate having an area on the order of 5 to 50 cm 2 . By stringing modules equipped with LEDs, the desired lamp size is generated.
  • COB chip-on-board
  • the heat generated during operation due to the non-100% efficiency of the LEDs (optical output power in relation to fed-in electrical power, ⁇ 100%, typ.5-60% for UV-A and blue LED chips), must by the Heatsink be discharged as a cooling system.
  • the cooling bodies 8, which are cooled with liquid, are three-dimensional bodies having a flat side to which the substrates are applied. Inside, the heat sink 8 may be completely hollow, or may have a channel or micro channel system. The finer the structure within the heat sink 8, the greater the surface area between the heat sink and the cooling liquid, via which heat can be released from the system to the cooling liquid.
  • the luminaire according to the invention fulfills the specifications for the realization of an LED dryer (LED luminaire) with high specific optical power (radiated total power of> 10 W per cm length), which has the need for efficient cooling and efficient optics to achieve high peak irradiance (> 2 W / cm 2 , at> 40 mm distance, with target values of 4-10 W / cm 2 at intervals of 40-100 mm between luminaire and target plane) combined, while the smallest possible height in the exit direction of ⁇ 80 mm.
  • LED luminaire LED luminaire
  • high specific optical power radiated total power of> 10 W per cm length

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Led Device Packages (AREA)
  • Drying Of Solid Materials (AREA)
  • Vehicle Body Suspensions (AREA)
EP13714847.4A 2012-05-02 2013-03-14 Leuchte mit reflektor Not-in-force EP2844474B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201330342A SI2844474T1 (sl) 2012-05-02 2013-03-14 Svetilka z reflektorjem
HRP20161336TT HRP20161336T1 (hr) 2012-05-02 2016-10-13 Rasvjetno tijelo s reflektorom

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012008641A DE102012008641A1 (de) 2012-05-02 2012-05-02 Leuchte mit Reflektor
PCT/EP2013/000783 WO2013164051A1 (de) 2012-05-02 2013-03-14 Leuchte mit reflektor

Publications (2)

Publication Number Publication Date
EP2844474A1 EP2844474A1 (de) 2015-03-11
EP2844474B1 true EP2844474B1 (de) 2016-07-27

Family

ID=48050649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13714847.4A Not-in-force EP2844474B1 (de) 2012-05-02 2013-03-14 Leuchte mit reflektor

Country Status (17)

Country Link
US (1) US9266360B2 (ko)
EP (1) EP2844474B1 (ko)
JP (1) JP5921763B2 (ko)
KR (1) KR101748016B1 (ko)
CN (2) CN104428136A (ko)
BR (1) BR112014027222A2 (ko)
CA (1) CA2872074C (ko)
DE (1) DE102012008641A1 (ko)
DK (1) DK2844474T3 (ko)
ES (1) ES2599278T3 (ko)
HR (1) HRP20161336T1 (ko)
HU (1) HUE030637T2 (ko)
LT (1) LT2844474T (ko)
PL (1) PL2844474T3 (ko)
PT (1) PT2844474T (ko)
SI (1) SI2844474T1 (ko)
WO (1) WO2013164051A1 (ko)

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JP6699437B2 (ja) * 2016-08-09 2020-05-27 セイコーエプソン株式会社 記録装置
US11370231B2 (en) * 2017-04-07 2022-06-28 Phoseon Technology, Inc. Pivoted elliptical reflector for large distance reflection of ultraviolet rays
JP7246373B2 (ja) * 2018-03-22 2023-03-27 株式会社トクヤマ 被覆層を有するプラスチックレンズの製造方法
CN114474984B (zh) * 2022-02-09 2022-11-29 江苏欧普特条码标签有限公司 一种条码标签印刷机的双反射紫外线固化组件

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Also Published As

Publication number Publication date
PT2844474T (pt) 2016-10-18
BR112014027222A2 (pt) 2017-06-27
JP2015524158A (ja) 2015-08-20
US20150130880A1 (en) 2015-05-14
CN104428136A (zh) 2015-03-18
DE102012008641A1 (de) 2013-11-07
ES2599278T3 (es) 2017-01-31
HRP20161336T1 (hr) 2016-11-18
KR20140146164A (ko) 2014-12-24
CN109973958A (zh) 2019-07-05
JP5921763B2 (ja) 2016-05-24
LT2844474T (lt) 2016-11-10
DK2844474T3 (en) 2016-10-24
CA2872074A1 (en) 2013-11-07
US9266360B2 (en) 2016-02-23
SI2844474T1 (sl) 2016-11-30
KR101748016B1 (ko) 2017-06-15
PL2844474T3 (pl) 2017-01-31
CA2872074C (en) 2017-01-17
WO2013164051A1 (de) 2013-11-07
HUE030637T2 (hu) 2017-06-28
EP2844474A1 (de) 2015-03-11

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