EP2876353A1 - Dispositif d'éclairage, luminaire et procédé de fabrication - Google Patents

Dispositif d'éclairage, luminaire et procédé de fabrication Download PDF

Info

Publication number
EP2876353A1
EP2876353A1 EP13194172.6A EP13194172A EP2876353A1 EP 2876353 A1 EP2876353 A1 EP 2876353A1 EP 13194172 A EP13194172 A EP 13194172A EP 2876353 A1 EP2876353 A1 EP 2876353A1
Authority
EP
European Patent Office
Prior art keywords
lighting device
tubular body
optical film
solid state
film
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.)
Withdrawn
Application number
EP13194172.6A
Other languages
German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips 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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP13194172.6A priority Critical patent/EP2876353A1/fr
Publication of EP2876353A1 publication Critical patent/EP2876353A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F21V7/10—Construction
    • F21V7/18—Construction with provision for folding or collapsing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/90—Methods of manufacture
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • 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
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • 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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V7/04—Optical design
    • F21V7/043—Optical design with cylindrical surface
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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]

Definitions

  • the present invention is related to a lighting device having a tubular body and a plurality of solid state lighting elements mounted inside said tubular body.
  • the present invention is further related to a luminaire including such a lighting device.
  • the present invention is yet further related to a method of manufacturing such a lighting device.
  • SSD solid state lighting
  • An example of such a SSL element is a light emitting diode.
  • SSL element-based lighting devices A drawback of SSL element-based lighting devices is that the compatibility with incandescent light-based device fittings, e.g. luminaires, is not perfect, which hampers the market penetration of the SSL element-based lighting devices. Cost is another concern; SSL element-based lighting devices are significantly more expensive than their traditional counterparts, such that there is an existing need to reduce the cost of such devices. This is a far from trivial task as SSL-based lighting devices typically require several additional optical components to shape the luminous output of the SSL elements such that it mimics or improves the appearance and/or luminous distribution of its traditional counterparts.
  • the lighting devices include housings made of shattering materials, e.g. glass or hard polymers
  • a risk of injury upon breakage of the housing exists, which may furthermore expose live SSL elements.
  • At least the injury risk has been recognized in US 6,452,325 B2 , which discloses a fluorescent lamp having a glass envelope and a polymeric coating over the lamp envelope so that it intimately embraces substantially all of the external contours of the lamp, including its glass envelope and end-ferrules, thereby increasing the hoop strength of the glass envelope.
  • this adds another component to the lighting device design, which further increases cost and hampers market penetration, in particular for SSL element-based lighting devices.
  • the present invention seeks to provide a more cost-effective lighting device having a tubular body and a plurality of solid state lighting elements mounted inside said tubular body.
  • the present invention further seeks to provide a luminaire comprising such a more cost-effective lighting device.
  • the present invention yet further seeks to provide a method of manufacturing such a more cost-effective lighting device.
  • a lighting device having a tubular body and a plurality of solid state lighting elements mounted inside said tubular body, wherein the lighting device further comprises an optical film enveloping said tubular body, wherein at least a portion of said optical film is adapted to redirect the luminous output of said solid state lighting elements.
  • the present invention is based on the insight that at least some of the beam shaping optical elements required to shape the luminous output of the SSL elements in order for the luminous output of the lighting device to become more aesthetically pleasing, e.g. more similar to the luminous output of traditional tubular lighting devices such as fluorescent tubes, or to improve such luminous output, may be integrated in the film surrounding the tubular body.
  • This has the added advantage that the shatter proofing of the tubular lighting device may be achieved without increasing the number of components of the lighting device, thus providing a cost-effective SSL-element based tubular lighting device.
  • the tubular body is made of glass, as in such an embodiment the shatter proofing of the lighting device is particularly desirable.
  • said portion is adapted to diffuse at least part of the luminous output of said solid state lighting elements.
  • said portion is adapted to reflect at least part of the luminous output of said solid state lighting elements.
  • the optical film comprises a laminated section extending along the length of the tubular body, said laminated section comprising a further film portion adapted to manipulate the luminous output of said solid state lighting elements.
  • the optical film may implement a plurality of different optical functions, which further reduces the number of components of the lighting device.
  • the further film portion may be adapted to redirect the luminous output of said solid state lighting elements.
  • the further film portion may be a reflective film portion arranged such that at least a part of the luminous output of said solid state lighting elements is reflected by the reflective film portion.
  • the optical film may comprise an overlapping section on said tubular body, said overlapping section comprising an adhesive on the respective surfaces of the overlapping section that face each other. This allows for a simply assembly of the optical film on the tubular body.
  • the adhesive may for instance be an adhesive tape.
  • the at least one solid state lighting element may be a light emitting diode (LED) such as an organic or inorganic LED.
  • LED light emitting diode
  • a luminaire comprising the lighting device according to embodiments of the present invention.
  • a luminaire may for instance be a holder of the lighting device or an apparatus into which the lighting device is integrated.
  • a method of manufacturing a tubular lighting device comprising providing a tubular body; mounting a plurality of solid state lighting elements inside said tubular body; and enveloping said tubular body with an optical film adapted to redirect the luminous output of said solid state lighting elements.
  • the optical film has a first end portion comprising a first surface carrying a first adhesive and a second end portion opposite the first end portion, said second end portion comprising a second surface carrying a second adhesive, and wherein the step of enveloping the tubular body with the optical film comprises forming an overlapping section in the optical film, wherein in said overlapping section the first adhesive contacts the second adhesive.
  • the method further comprises laminating a further film portion adapted to manipulate the luminous output of said solid state lighting elements onto the optical film prior to enveloping said tubular body with the optical film.
  • the further film portion may be a reflective film portion, wherein the step of enveloping said tubular body with the optical film comprises aligning the further film portion with said solid state elements such that at least a part of the luminous output of said solid state lighting elements is reflected by the reflective film portion.
  • a reflective film portion may for instance be used as a redirection element for redirecting the luminous output of the SSL elements towards a target area to be illuminated, e.g. a work surface or the like, thereby creating a more focussed luminous output compared to traditional fluorescent tubular lighting devices that typically produce a 360° luminous output distribution.
  • the term 'redirect' is used in relation to optical films to describe optical effects that prevent light from simply travelling through such optical films. It therefore is intended to exclude optical films that modify the optical path of light through the film by virtue of the refractive index of the film only. Instead, such redirection of light is intended to cover optical films that assist in reducing the angle of luminous distribution of the lighting device and/or prevent an observer from directly observing the luminous surfaces of the SSL elements inside the tubular body of the lighting device.
  • FIG. 1 schematically depicts a cross-section of a lighting device according to an embodiment of the present invention.
  • the lighting device comprises a tubular body 10, which may be made of any suitable material, e.g. glass or a suitable polymer such as polycarbonate or PMMA and may be transparent or translucent, e.g. clouded, to allow light to exit the lighting device.
  • the tubular body 10 has an inner volume in which a carrier 12 is fitted.
  • the carrier 10 carries a plurality of SSL elements 14, which for instance may be mounted on a circuit board (not shown). Alternatively, each SSL element 14 may be mounted individually on the carrier 12.
  • the SSL elements in the lighting device may be LEDs, e.g. organic or inorganic LEDs.
  • the carrier 12 preferably acts as a heat sink for the SSL elements 14.
  • the carrier 12 is made of a material having good heat conductive properties, e.g. a metal. Aluminium is particularly preferred. In embodiments where such a heat sink functionality is not required, the carrier 12 may also be chosen from materials lacking such heat conductive properties. Generally speaking, the carrier 12 may be selected from any suitable material.
  • the carrier 12 may be secured in the tubular body 10 in any suitable manner, e.g. using an adhesive or adhesive tape 16.
  • the lighting device further comprises an optical film 20 enveloping the tubular body 10.
  • an optical film 20 is typically a polymer film, e.g. a PET film.
  • the optical film 20 at least comprises a portion that redirects the luminous output of the SSL elements 14.
  • the entire optical film 20 acts as a diffuser such that the luminous surfaces of the SSL elements 14 cannot be directly observed by an observer when the lighting device is in use.
  • the optical film 20 further provides shatter protection such that upon breaking the tubular body 10 the fragments of the broken tubular body 10 are contained by the optical film 20, thereby preventing persons from becoming exposed to these fragments or indeed from direct exposure to live parts of the lighting device, such as live SSL elements 14 and/or their driver circuits.
  • the optical film 20 comprises a laminated section including a further film portion 22 extending over the full length of the tubular body 10.
  • the optical film 20 is a transparent film with the further film portion 22 acting as a diffuser for at least a part of the luminous output of the SSL elements 14.
  • FIG. 3 schematically depicts a cross-section of a lighting device according to yet another embodiment of the present invention, wherein the tubular body 10 is enveloped by an optical film 20 comprising a laminated section in which the diffusing further film portion 22 in FIG. 2 is replaced by a reflective film portion 24.
  • the optical film 20 may be a transparent film defining a light exit window of the lighting device outside the laminated section.
  • the reflective film portion 24 may be used to reduce the angle of distribution of the luminous output of the lighting device, i.e. to produce a more focussed luminous output such that a higher luminous flux per unit area of the light exit window of the lighting device is achieved. This may for instance be used to increase the luminous intensity directed to a target area such as a work surface or the like above which the lighting device is mounted.
  • FIG. 3 the reflective film portion 24 is positioned on the tubular body 10 such that the luminous surfaces of the SSL elements 14 face the reflective film portion 24 by way of non-limiting example. It is for instance equally feasible to mount the carrier 12 including the SSL elements 14 such that the carrier 12 is placed over the reflective film portion 24.
  • FIG. 4 schematically depicts a cross-section of a lighting device according to yet another embodiment of the present invention. The embodiment shown in FIG. 5 is the same as the embodiment shown in FIG. 3 apart from the fact that the optical film 20 is a diffusing film rather than a transparent film. This has the advantage that the optical film combines two optical functions, i.e.
  • optical functionality of the optical film 20 has been limited to reflection and diffusion, alternative or additional functions, e.g. colour adjustment, partial absorption and so on, may also be contemplated without departing from the teachings of the present invention.
  • the further film portion is shown external to the optical film 20 by way of non-limiting example only. It is of course equally feasible to mount the optical film 20 onto the tubular body 10 such that the further film portion 22 or 24 is located in between the tubular body 10 and the optical film 20. Other suitable mounting arrangements may be contemplated.
  • the optical film 20 may comprise a plurality of laminated sections, i.e. comprises a plurality of further film portions in different regions of the optical film 20, which may be individually arranged relative to the glass tube 10 in any suitable manner, e.g. in between the optical film 20 and the glass tube 10 or external to the optical film 20 such that the optical film 20 is located in between the glass tube 10 and the further film portion as is shown in FIG. 1-5 .
  • Different further film portions may provide different optical functionality, e.g. the optical film 20 may carry reflective as well as diffusive further film portions.
  • the diffusive and reflective optical film portions may be made from any suitable polymer material, e.g. PET, which can be made diffusive or reflective by secondary processing steps, as is well-known per se.
  • an optical film 20 is provided, which in certain embodiments may comprise a laminated section including a further film portion 24, e.g. a reflective film portion on a diffusing or transparent optical film 20.
  • the film portion 24 may be laminated onto the optical film 20 in any suitable manner, e.g. using an adhesive or using electrostatic interactions between the film portion 24 and the optical film 20 to keep the film portion 24 in its intended location.
  • the optical film 20 may for instance be manufactured by roll to roll lamination.
  • the further film portion 24 may be omitted such that the optical film 20 alone implements the desired optical function, e.g. diffusion.
  • the optical film 20 further comprises a first end portion comprising a first surface carrying a first adhesive 26 and a second end portion opposite the first end portion, wherein the second end portion comprises a second surface carrying a second adhesive 26'.
  • the second adhesive 26' may be omitted.
  • adhesive tape may also be used.
  • step (b) in which the tubular body 10 is enveloped with the optical film 20, for instance by forming an overlapping section in the optical film 20 wherein the opposite ends of the optical film 20 are adhered to each other by the first adhesive 26 and optionally by the second adhesive 26' as previously explained.
  • the further film portion 24 may be located in between the optical film 20 and the tubular body 10 or may alternatively be located at the external surface of the optical film 20, as shown in step (b).
  • the aforementioned embodiment of the manufacturing method of the lighting device is shown by way of non-limiting example only, and several alternative embodiments may be contemplated.
  • the tubular body 10 may be at least partially covered by an adhesive for securing the optical film 20 on the tubular body 20.
  • Other alternatives will be immediately apparent to the skilled person.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)
EP13194172.6A 2013-11-23 2013-11-23 Dispositif d'éclairage, luminaire et procédé de fabrication Withdrawn EP2876353A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13194172.6A EP2876353A1 (fr) 2013-11-23 2013-11-23 Dispositif d'éclairage, luminaire et procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13194172.6A EP2876353A1 (fr) 2013-11-23 2013-11-23 Dispositif d'éclairage, luminaire et procédé de fabrication

Publications (1)

Publication Number Publication Date
EP2876353A1 true EP2876353A1 (fr) 2015-05-27

Family

ID=49709471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13194172.6A Withdrawn EP2876353A1 (fr) 2013-11-23 2013-11-23 Dispositif d'éclairage, luminaire et procédé de fabrication

Country Status (1)

Country Link
EP (1) EP2876353A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016118091B3 (de) * 2016-09-26 2017-12-28 Insta Gmbh Linearleuchte
WO2020002868A1 (fr) * 2018-06-27 2020-01-02 Plumen Limited Procédé d'assemblage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4991070A (en) * 1989-07-12 1991-02-05 Herman Miller, Inc. Sleeve for a light element
US6452325B1 (en) 2000-07-24 2002-09-17 Thermoplastic Processes, Inc. Shatterproofing of fluorescent lamps
JP2004152696A (ja) * 2002-10-31 2004-05-27 Nakagawa Kaseihin Kk 蛍光灯用反射材
US20090140271A1 (en) * 2007-11-30 2009-06-04 Wen-Jyh Sah Light emitting unit
JP2009146842A (ja) * 2007-12-18 2009-07-02 Seiki Uchiyama 電磁波照射管
US20090206755A1 (en) * 2008-02-14 2009-08-20 Hong-Bing Tsai Lamp tube structure with reflective surface
KR20120073930A (ko) * 2010-12-27 2012-07-05 엘지이노텍 주식회사 조명 장치
US20130033888A1 (en) * 2010-04-23 2013-02-07 Koninklijke Philips Electronics, N.V. Lighting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4991070A (en) * 1989-07-12 1991-02-05 Herman Miller, Inc. Sleeve for a light element
US6452325B1 (en) 2000-07-24 2002-09-17 Thermoplastic Processes, Inc. Shatterproofing of fluorescent lamps
JP2004152696A (ja) * 2002-10-31 2004-05-27 Nakagawa Kaseihin Kk 蛍光灯用反射材
US20090140271A1 (en) * 2007-11-30 2009-06-04 Wen-Jyh Sah Light emitting unit
JP2009146842A (ja) * 2007-12-18 2009-07-02 Seiki Uchiyama 電磁波照射管
US20090206755A1 (en) * 2008-02-14 2009-08-20 Hong-Bing Tsai Lamp tube structure with reflective surface
US20130033888A1 (en) * 2010-04-23 2013-02-07 Koninklijke Philips Electronics, N.V. Lighting device
KR20120073930A (ko) * 2010-12-27 2012-07-05 엘지이노텍 주식회사 조명 장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016118091B3 (de) * 2016-09-26 2017-12-28 Insta Gmbh Linearleuchte
WO2020002868A1 (fr) * 2018-06-27 2020-01-02 Plumen Limited Procédé d'assemblage

Similar Documents

Publication Publication Date Title
US20210173138A1 (en) Illumination Device for Direct-Indirect Illumination
US9341321B2 (en) Lens having light transmissive portion and optic shield portion
US10473847B2 (en) Illumination device having a light guide with leaky side surfaces
EP3369985B1 (fr) Luminaire ayant un guide de lumière
US20140192558A1 (en) Illumination Systems Providing Direct and Indirect Illumination
EP2979023B1 (fr) Dispositif d'éclairage et luminaire
US8946978B2 (en) Lighting device with omnidirectional light distribution
US10520663B2 (en) Illumination system based on active and passive illumination devices
EP3497365B1 (fr) Luminaire indirecte
EP2876353A1 (fr) Dispositif d'éclairage, luminaire et procédé de fabrication
US20110199765A1 (en) Linear LED Lamp
RU2657242C2 (ru) Осветительное устройство и способ для уменьшения дискомфортного отблеска
EP3132179B1 (fr) Dispositif d'éclairage et luminaire
US10663138B2 (en) Light reflector systems and methods
KR101514403B1 (ko) 엘이디가로등 헤드용 고효율 배광판
WO2021204581A1 (fr) Dispositif électroluminescent
TW201131117A (en) Illumination lamp

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20131123

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

18R Application refused

Effective date: 20150718

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20160902