EP3537037A1 - Beleuchtungssystem auf der basis von sichtsperre und mehrfachreflexion für punkt- und richtungslichtquellen - Google Patents

Beleuchtungssystem auf der basis von sichtsperre und mehrfachreflexion für punkt- und richtungslichtquellen Download PDF

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Publication number
EP3537037A1
EP3537037A1 EP18161042.9A EP18161042A EP3537037A1 EP 3537037 A1 EP3537037 A1 EP 3537037A1 EP 18161042 A EP18161042 A EP 18161042A EP 3537037 A1 EP3537037 A1 EP 3537037A1
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EP
European Patent Office
Prior art keywords
lighting
point
light
cross
cell
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Withdrawn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
EP18161042.9A
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English (en)
French (fr)
Inventor
Refik KAHRAMAN
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.)
Teknoluks Endustriyel Metal Ve Plastik San Tic Ltd Sti
Original Assignee
Teknoluks Endustriyel Metal Ve Plastik San Tic Ltd Sti
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 Teknoluks Endustriyel Metal Ve Plastik San Tic Ltd Sti filed Critical Teknoluks Endustriyel Metal Ve Plastik San Tic Ltd Sti
Priority to EP18161042.9A priority Critical patent/EP3537037A1/de
Priority to PCT/TR2019/050023 priority patent/WO2019203760A2/en
Priority to TR2020/04240U priority patent/TR202004240U5/tr
Publication of EP3537037A1 publication Critical patent/EP3537037A1/de
Withdrawn legal-status Critical Current

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    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional 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

  • This invention is related to a high level of energy efficient modular lighting system based on multiple reflection and sight blocking, developed particularly for point/directional light emitting LEDs and other light sources of the same characteristics, generating convenient light properties (e.g. with respect to glare , color rendering , homogeneity) and providing light distribution control in line with the standards required by all applicable industrial lighting fields (indoor / office-school-hospital-supermarket etc. lighting, road and tunnel lighting, park and garden lighting, architectural lighting etc.) where point/directional light sources / LEDs are used.
  • the invention has particularly been developed for point (emitting intensive light from a small surface) and directional (emitting light in one direction) light sources.
  • the industrially applicable forms of the mentioned point/directional light sources currently used in artificial lighting are the LED light sources.
  • Point/directional light sources and consequently LED light sources are used in the subject system of our invention.
  • LEDs Light emitting diodes
  • LEDs which emit point (not surface), directional (not all or omni-directional ) and highly intensive light, have made most of the conventional luminaire optical components (opal diffusers - prismatic diffusers - parabolic aluminum reflectors - metalized plastic louvers...) functionless due to their unsuitability and incapacity for controlling light sources of these forms.
  • the louvers of at least one of the first or second sets are angularly oriented to nadir and spaced apart to confine light passing downwardly therethrough to an asymmetrical candlepower distribution curve.
  • One quadrant of the curve termed a "wall washing quadrant” is on one side of the curve and a "low direct glare quadrant” is oriented to an opposite side of the curve.
  • the light and light grid are said to be placed adjacent the wall such that the wall washing quadrant is oriented toward the wall to illuminate the wall and the low direct glare distribution quadrant is said to be oriented toward the interior of the room.
  • the wall washing quadrant was supposed to eliminate the "cave effect" at the juncture of the adjacent wall and the ceiling while the low direct glare quadrant was supposed to provide desired illumination directed into the adjacent room. It is also claimed in the said patent document that variations of the grid arrangement allowed for uniform lighting of corners as well as end and side walls within a room. The industrial embodiments of this specific product described in the said patent and alternative similar products subsequently introduced have verified the claims to a certain extent.
  • the light source of the system was a metal halide lamp installed horizontally in the luminaire body and positioned parallel to the underlaid louver grid.
  • the drawings in the patent text also depicts a metal halide (or similar) lamp as the light source of the system.
  • a metal halide lamp installed horizontally in the luminaire body and positioned parallel to the underlaid louver grid.
  • the invention intends to present solutions for following problems:
  • the light losses are very high (opal diffusers: 25-35% / transparent micro-prismatic diffusers: 12-18%) due to plastic diffusers inevitably needed as integral part of the system to decrease intensity and reduce glare.
  • plastic diffusers are not needed in the invented system in order to solve the above mentioned (1 st ) problem of glare, the operational light losses are considerably low.
  • the PCB surface is coated with white reflective film having +98% total reflection, in order to minimize the possible losses due to substantial back reflections mainly from sight blocking cross jointed 1 st . reflection lamella and partly from the other lamellas forming the louver cell walls. According to the definitive lighting laboratory test results, the luminous efficacies achieved with the first prototypes are:
  • PROBLEM 3 Distribution control of the point light (LED) radiation:
  • the 3 rd . group of industrially accepted, LED based lighting systems depicted above, are able to achieve light distribution control in a wide range of beams (8° - 65°) while maintaining the efficiency at considerably high levels.
  • this performance can be realized only in certain lighting applications and at high unit costs. Due to their high lumen output emitted from a rather small luminous area in this family of luminaires, their application areas are technically restricted with high ceiling areas and/or certain specific applications.
  • the 4 th .group of industrially accepted, LED based lighting systems depicted above, provide angular light distribution control at acceptably good levels and maintain relatively high efficiency levels.
  • this performance can be realized only in certain lighting applications and at high unit costs.
  • the subject system of the invention offers:
  • This invention relates to a high level of energy efficient modular lighting system based on multiple reflection and sight blocking, developed particularly for point - directional light emitting LEDs (2) and other light sources of the same characteristics , generating convenient light properties (e.g. with respect to glare , color rendering , homogeneity) and providing light distribution control in line with the standards required by all applicable lighting fields (indoor / office-school-hospital-supermarket etc. lighting, road and tunnel lighting, park and garden lighting, architectural lighting etc.) where point/directional light sources / LEDs are used.
  • the invented lighting system includes:
  • top and bottom open grids/cells are constituted by the articulation of the cross-blanked lamellas (4) with the perpendicular-blanked lamellas (5,6) (see figure 7.1 ) or by the articulation of identical perpendicular-blanked lamellas (5) with each other (see figure 7.2 ) and the tops of these cells are completely closed with reflective film (3) laminated PCBs (1) on which proper point/directional light sources (2) are assembled in the position fitting for the purpose of the target lighting objectives , so that only the bottom surfaces of the cells facing the target lighting area remain open (see figures 11.1 , 11.2 , 12.1, 12.2 ).
  • the required number and power of LEDs are mounted into the luminaires generally in equal intervals so as to provide sufficiently homogeneous target lumen output.
  • the light properties of each point/directional light source (2) confined in a separate cell can be controlled as an independent lighting fixture.
  • the lighting system composed of independently functioning cells / modules may consist of a single cell which may function as a low power but competent luminaire, or it may consist of hundreds and even thousands of cells / modules in accordance with the target lighting power, purpose and function simply by extending the lengths of lamellas (4,5,6) accordingly. (see figures 7.1, 7.2, 8.1, 8.2 )
  • the mentioned lamellas (4, 5, 6) are utilized to control light distribution at high angles and to prevent the direct, uncontrolled and highly intensive emission of important part (+75%) of light generated by the point/directional light sources (2) towards the target lighting area in cross jointed louver type (see figures 7.1, 8.1 ).
  • the intersecting identical lamellas (5) forming the cell walls are used for restricting the light distribution at high angles and/or to canalize it towards the direction in accordance with the target lighting purposes (see figures 7.2 , 8.2 ).
  • the invention provides light distribution control and light intensity / glare control by means of sight-blocking and multi-reflection, it generates a much higher number of reflections than all other existing LED lighting applications.
  • each reflection also means loss of light, it is critically important that all reflection surfaces (the cross and vertical lamellas (4, 5, 6) and PCB (1) surfaces) in the system should have a very low ( ⁇ 2%) light loss / absorption in each reflection.
  • this feature could be achieved with PVD pure aluminum and PVD silver coated surfaces or high reflection polymer films which have already been used extensively in some LED lighting systems (e.g. spot lights - parabolic reflectors - TIR lenses) as well as prior lighting systems using fluorescent or other discharge lamps.
  • the chart (efficiency curve as per number of reflections) in figure 9 clearly shows that the efficiency may decrease dramatically unless such a high reflection is provided.
  • the subject lighting system of the invention may use specular, semi-specular, luminal matte and patterned PVD reflective materials as the lamella (4, 5, 6) surfaces, wherein:
  • the lamellas (4, 5, 6) can be defined:
  • the light distribution and beam angles can directly be controlled and the light intensity can indirectly be controlled by shifting the positions of the point/directional light resources (2) assembled on the reflective film (3) laminated PCB (1) covering the cell top completely, from the center position, in the direction towards either of the perpendicular blanked cross lamellas (5, 6) in the system (see figure 13.1 ).
  • This function utilizable, which does not exist / is not foreseen and used in any of the existing general LED lighting applications, a new parameter / factor has been put in use, in the direct control of light distribution and beam angles and indirect control of light intensity and glare.
  • point/directional light sources (2) in a lighting system with cross-jointed lamellas, causes a critical optical / light distribution problem which does not occur with the usage of the surface / extended / spherical / omni-directional light sources:
  • the light of point and directional nature leaves the closed cross-jointed cell system formed by the lamellas (4, 5, 6) and distributed into the lighting area in 0 -180° main axis (and partially in the adjacent 30-210° and 60-240° axes as well), it splits into 3 independent and disconnected beams having optically problematic relationships with each other with respect to the lighting technique (see figure 13.2 ) and this situation causes the lighting problems described below:
  • the solution to above described serious optical problem is created by shortening the width of the first perpendicularly blanked cross lamella (5) in a manner and at the extent to prevent the formation of beam 1 (see figure 14.1 )
  • the extent /size of the shortening is directly interrelated with the position of the point/directional light source (2) in the cell: the more , the point/directional light source is brought closer to the second vertically blanked cross lamella (6), the less shortening will be needed (see: figure 13.1 ) and 2 important results will arise from this formation:
  • the function / benefit obtained by shortening the width of the first perpendicularly blanked cross lamella (5) can also be achieved by shortening the width of the first perpendicularly blanked lamella (5) less than required (to achieve the function mentioned above properly), and compensating this deficiency by extending the width of the opposed second perpendicularly blanked cross lamella (6) (see figure 15.1 ).
  • this new form of the grid cell structure not only the cut-off for the undesired beam at 64-76 degrees could be obtained, but as new parameter / function to control the distribution of point/directional light sources (2), this modification also expands the light distribution beam angles of the system.
  • an asymmetric light distribution could be obtained in various distribution forms and angles by converging the point/directional light source (2) towards one of the perpendicular cell walls and:

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP18161042.9A 2018-03-09 2018-03-09 Beleuchtungssystem auf der basis von sichtsperre und mehrfachreflexion für punkt- und richtungslichtquellen Withdrawn EP3537037A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18161042.9A EP3537037A1 (de) 2018-03-09 2018-03-09 Beleuchtungssystem auf der basis von sichtsperre und mehrfachreflexion für punkt- und richtungslichtquellen
PCT/TR2019/050023 WO2019203760A2 (en) 2018-03-09 2019-01-10 Lighting system based on sight blocking and multiple reflection for point and directional light sources
TR2020/04240U TR202004240U5 (tr) 2018-03-09 2019-01-10 Noktasal ve tek doğrultuda yayılım gösteren ışık kaynakları için görüntü bloklama ve çoklu yansımaya dayalı aydınlatma sistemi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18161042.9A EP3537037A1 (de) 2018-03-09 2018-03-09 Beleuchtungssystem auf der basis von sichtsperre und mehrfachreflexion für punkt- und richtungslichtquellen

Publications (1)

Publication Number Publication Date
EP3537037A1 true EP3537037A1 (de) 2019-09-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18161042.9A Withdrawn EP3537037A1 (de) 2018-03-09 2018-03-09 Beleuchtungssystem auf der basis von sichtsperre und mehrfachreflexion für punkt- und richtungslichtquellen

Country Status (3)

Country Link
EP (1) EP3537037A1 (de)
TR (1) TR202004240U5 (de)
WO (1) WO2019203760A2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200002255A1 (it) * 2022-02-08 2023-08-08 Palazzoli Spa Apparecchio di illuminazione

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111741557A (zh) * 2020-05-12 2020-10-02 上海光瑞灯具制造有限公司 一种灯具电路控制系统

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008791A (en) 1990-07-19 1991-04-16 Caferro Ronald N Low direct glare and wall wash parabolic lighting grid
US20040174706A1 (en) * 2003-03-05 2004-09-09 Tir Systems Ltd. System and method for manipulating illumination created by an array of light emitting devices
EP2056016A1 (de) * 2006-08-25 2009-05-06 The Furukawa Electric Co., Ltd. Beleuchtungsvorrichtung
US20100108998A1 (en) * 2007-04-04 2010-05-06 Koninklijke Philips Electronics N.V. Light emitting device
US20110075398A1 (en) * 2008-06-13 2011-03-31 Wheatley John A Collimating light engine
DE102011080313A1 (de) * 2011-08-03 2013-02-07 Osram Ag Rasterleuchte mit mehreren halbleiterstrahlern
CN103148454B (zh) 2011-12-06 2016-06-01 海洋王照明科技股份有限公司 灯具
WO2017123170A1 (en) * 2016-01-11 2017-07-20 Teknoluks Endustriyel Metal Ve Plastik San. Tic. Ltd. Sti. Egg-crate louver system blocking image from 3 directions

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008791A (en) 1990-07-19 1991-04-16 Caferro Ronald N Low direct glare and wall wash parabolic lighting grid
US20040174706A1 (en) * 2003-03-05 2004-09-09 Tir Systems Ltd. System and method for manipulating illumination created by an array of light emitting devices
EP2056016A1 (de) * 2006-08-25 2009-05-06 The Furukawa Electric Co., Ltd. Beleuchtungsvorrichtung
US20100108998A1 (en) * 2007-04-04 2010-05-06 Koninklijke Philips Electronics N.V. Light emitting device
US20110075398A1 (en) * 2008-06-13 2011-03-31 Wheatley John A Collimating light engine
DE102011080313A1 (de) * 2011-08-03 2013-02-07 Osram Ag Rasterleuchte mit mehreren halbleiterstrahlern
CN103148454B (zh) 2011-12-06 2016-06-01 海洋王照明科技股份有限公司 灯具
WO2017123170A1 (en) * 2016-01-11 2017-07-20 Teknoluks Endustriyel Metal Ve Plastik San. Tic. Ltd. Sti. Egg-crate louver system blocking image from 3 directions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200002255A1 (it) * 2022-02-08 2023-08-08 Palazzoli Spa Apparecchio di illuminazione

Also Published As

Publication number Publication date
WO2019203760A2 (en) 2019-10-24
TR202004240U5 (tr) 2021-01-21
WO2019203760A3 (en) 2019-12-12

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