[go: up one dir, main page]

EP1110027A1 - Eclairage et feux de signalisation - Google Patents

Eclairage et feux de signalisation

Info

Publication number
EP1110027A1
EP1110027A1 EP00943929A EP00943929A EP1110027A1 EP 1110027 A1 EP1110027 A1 EP 1110027A1 EP 00943929 A EP00943929 A EP 00943929A EP 00943929 A EP00943929 A EP 00943929A EP 1110027 A1 EP1110027 A1 EP 1110027A1
Authority
EP
European Patent Office
Prior art keywords
opto
luminaire
elements
collimating
electronic
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Withdrawn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
EP00943929A
Other languages
German (de)
English (en)
Inventor
Matthijs H. Keuper
Albertus J. H. M. Kock
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.)
Lumileds Netherlands BV
Original Assignee
Lumileds Netherlands BV
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 Lumileds Netherlands BV filed Critical Lumileds Netherlands BV
Priority to EP00943929A priority Critical patent/EP1110027A1/fr
Publication of EP1110027A1 publication Critical patent/EP1110027A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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 invention relates to a luminaire comprising a housing having a light emission window, wherein the housing accommodates a plurality of opto-electronic elements and a plurality of collimating elements, wherein, in operation, the opto-electronic elements emit visible light, and wherein each of the collimating elements has an optical axis and is associated with an opto-electronic element.
  • the invention also relates to a signaling lamp provided with a luminaire.
  • Luminaires of this type comprise a relatively large number of opto-electronic elements, also referred to as electro-optical elements, for example electroluminescent elements, such as light-emitting diodes (LEDs). These light sources are generally distributed in accordance with a certain regular pattern over an inner surface of the housing.
  • the collimating elements for example positive lenses, such as Fresnel lenses, provide for a proper light-intensity distribution and, if necessary, a homogeneous brightness distribution. It is noted that "light intensity distribution” is to be taken to mean the angle-dependent light intensity distribution.
  • “Brightness distribution” is to be taken to mean the angle-independent light distribution on the surface of the light emission window of the luminaire.
  • US-A 5 816 681 describes how the collimating elements can be structured in such a way that an opto-electronic element is associated with each one of the collimating elements. By virtue of the presence of collimating elements, the brightness distribution of the light emission window of the luminaire is at least substantially homogeneous in operation.
  • Luminaires and signaling lamps of the type described hereinabove have an important drawback. If it is not desired to illuminate the entire light emission window, for example because a mask covers a part of the light emission window, the part of the light which is incident on the covered part of the light emission window is lost, leading to a reduction of the light output of the luminaire, which is undesirable. It is an object of the invention to obviate the above-mentioned drawback.
  • the invention more particularly aims at providing a luminaire of the type mentioned in the opening paragraph, wherein a relatively high light output is obtained also if inhomogeneous lighting at the location of the light emission window is desired.
  • the luminaire is characterized in accordance with the invention in that the opto-electronic element is arranged essentially eccentrically with respect to the optical axis of the collimating element with which the opto-electronic element is associated.
  • the opto-electronic element By arranging the opto-electronic element so as to be essentially off the optical axis of the associated collimating element, the ray path of the opto-electronic element's light beam issuing from the collimating element is changed.
  • a signaling lamp for example a traffic light, may be used for different lighting purposes.
  • a part of the light emission window is provided with a mask or other means which obstruct the passage of light, the luminaire showing, in operation, for example an illuminated arrow or an illuminated image of a pedestrian in a desired color.
  • Examples hereof include signaling lamps comprising one or more illuminated, colored arrows for traffic turning right or left, or signaling lamps comprising a stationary pedestrian showing red, or a (seemingly) walking pedestrian showing green.
  • the blinded part of the light emission window does not emit light.
  • the opto-electronic element is eccentrically arranged with respect to the optical axis of the collimating element in order to make sure that only the desired part of the light emission window is illuminated.
  • the blinded part of the light emission window may comprise more than 80% of the surface of the light emission window.
  • the opto-electronic element is situated on the optical axis of the optoelectronic element, so that an integral and homogeneous illumination of the light emission window is obtained.
  • the passage of, for example, only 15% of the light through the light emission window leads to a considerable loss of light output. If, in accordance with the invention, only the desired parts of the light emission window are irradiated, the cost of the opto-electronic elements and the cost of energy consumption are reduced considerably.
  • a light-emitting diode is associated with a Fresnel lens (collimating element), said LED being positioned on the optical axis of the Fresnel lens. If the LED is arranged in the focus of the Fresnel lens, said Fresnel lens emits a substantially parallel light beam which extends along the optical axis of the Fresnel lens.
  • the opto-electronic element is essentially positioned off the optical axis of the collimating element with which the opto- electronic element is associated. If the opto-electronic element is a LED and the collimating element is a (positive) Fresnel lens, said Fresnel lens emits a substantially parallel light beam with a specific aperture angle if the LED is arranged at a distance from the Fresnel lens which is equal to the focal distance of the Fresnel lens. If the LED is arranged at a distance greater or smaller than the focal distance of the Fresnel lens, then said Fresnel lens emits a converging or diverging light beam with a specific solid angle. Such light beams are alternatively referred to as pre-directed light beams.
  • An embodiment of the luminaire is characterized in accordance with the invention in that with at least one collimating element at least one further opto-electronic element is associated.
  • each of the collimating elements is associated with a single light source which is situated on the optical axis of the associated collimating element.
  • the use of one optoelectronic element per collimating element enables the light beam emitted by the collimating element to be directed, while the use of two or more opto-electronic elements per collimating element enables the light beam emitted by the collimating element to be directed as well as shaped into a specific form.
  • a luminaire in accordance with the invention wherein a plurality of optoelectronic elements is associated with each collimating element has the advantage that such a luminaire uses the available light much more efficiently.
  • An additional advantage of the luminaire in accordance with the invention is that a higher light output of the opto-electronic elements, for example because more efficient optoelectronic elements become available in the future, the number of opto-electronic elements per collimating element can be reduced without an adaptation of the internal optical structure of the luminaire being necessary. In the known luminaire, a reduction of the number of optoelectronic elements necessitates redesigning the optical structure.
  • a further advantage of the luminaire in accordance with the invention resides in that such a luminaire is less sensitive to aligning errors. In the known luminaire, opto-electronic elements which are misaligned are immediately visible.
  • a preferred embodiment of the luminaire in accordance with the invention is characterized in that the further opto-electronic element is essentially eccentrically arranged with respect to the optical axis.
  • the position of one of the opto-electronic elements may coincide with the optical axis of the associated collimating element.
  • the further opto-electronic element is essentially arranged on the optical axis.
  • the optical axes of the collimating elements are arranged so as to be substantially parallel to each other.
  • the manufacture of a luminaire is simplified considerably by integrating the collimating elements in a so-called optical surface. Since the collimating elements are arranged in a side-by-side relationship in one optical plane, these collimating elements do not all illuminate the same part of the light emission window.
  • the opto-electronic elements in the desired (eccentric) positions the direction of the light beams passing through the plurality of collimating elements is adapted to the desired illumination of the light emission window.
  • Fig. 1 A is an example of a front view of a signaling lamp provided with a luminaire in accordance with the invention
  • Fig. IB shows an alternative example of a front view of a signaling lamp provided with a luminaire in accordance with the invention
  • Fig. 2 is a sectional view of a luminaire in accordance with the invention in the y-z plane;
  • Fig. 3 is a sectional view of the luminaire shown in Fig. 2 in the x-z plane
  • Fig. 4 is a sectional view of the luminaire shown in Fig. 2 in the x-y plane
  • Figs. 5A-D show light contour lines in the x-z plane caused by one or more opto-electronic elements in different positions with respect to the optical axis of the collimating element with which the opto-electronic element or opto-electronic elements is (are) associated.
  • Fig. 1A and IB very diagrammatically show examples of front views of two different signaling lamps 1; 1', which are both provided with at least a luminaire in accordance with the invention.
  • an x-y-z coordinate system is shown.
  • the other Figures all show cross-sectional views of the luminaire in accordance with the indicated planes.
  • the signaling lamp 1 shown in Fig. 1 A is a traffic light, wherein the light emission window 3 is partly covered by a mask 12, so that an arrow 11 lights up when the light source is switched on.
  • the signaling lamp 1' shown in Fig. IB the light emission window 3 is partly covered by another mask 12', the picture representing a stationary or (seemingly) moving pedestrian, said picture lighting up when the light source is switched on.
  • Fig. 2 is a diagrammatic sectional view of a luminaire in accordance with the invention in the y-z plane.
  • the radiation beams shown are diagrammatic.
  • the luminaire comprises a housing 2 which is provided with a light emission window 3.
  • Said housing 2 accommodates a plurality of opto-electronic elements 5, 5', ...; 6, 6', ...; 7, 7', ... and a plurality of collimating elements 15; 16; 17.
  • the opto-electronic elements 5, 5', ...; 6, 6', ...; 7, 7, ... are light-emitting diodes (LEDs) and the collimating elements 15; 16; 17 are so-called positive Fresnel lenses.
  • LEDs light-emitting diodes
  • the optoelectronic elements 5, 5', ...; 6, 6', ...; 7, 7', ... emit visible light.
  • Each one of the collimating elements 15; 16; 17 has an optical axis 25; 26; 27, and each one of the collimating elements 15; 16; 17 is associated with at least one opto-electronic element 5; 6; 7.
  • the opto-electronic element 5; 6; 7 is arranged essentially off the optical axis 25; 26; 27 of the collimating elements 15; 16; 17 with which the opto-electronic element 5; 6; 7 is associated.
  • each one of the collimating elements 15; 16; 17 is associated with at least one further opto-electronic element 5'; 6'; 7, which is also essentially eccentrically arranged with respect to the optical axis 25; 26; 27.
  • the position of the further opto-electronic element coincides with the optical axis of the collimating element (not shown in Fig. 2).
  • Fig. 3 is a very diagrammatic, sectional view of the luminaire shown in Fig. 2 in the x-z plane.
  • the optical axes of the collimating elements 15; 16; 17; 18; 19 extend at right angles to the x-z plane at the location of the imaginary intersections of the dashed lines provided in each collimating element 15; 16; 17; 18; 19.
  • the collimating elements 15; 16; 17; 18; 19 have a hexagonal structure in the x-z plane (i.e.
  • each one of the collimating elements 15; 16; 17; 18; 19 is associated with eight opto-electronic elements 5, 5', ...; 6, 6', ...; 7, 7, ...; 8, 8', ...; 9, 9', ..., which are all arranged essentially off the optical axis of the associated collimating element 15; 16; 17; 18; 19.
  • the position of one of the further opto-electronic elements 5'; 6'; 7'; 8'; 9' coincides with the optical axis of the collimating element (not shown in Fig. 3).
  • Fig. 4 is a diagrammatic, sectional view of the luminaire shown in Fig. 2 in x-y plane. To simplify the drawing, the plurality of collimating elements 17; 18; 19 is shown as one optical structure 20. The radiation beams shown are diagrammatic.
  • the optical structure 20 comprises, for example, 7, 19 or 38 hexagonal Fresnel lenses (positive lenses).
  • a particularly attractive embodiment of the luminaire in accordance with the invention comprises 19 Fresnel lenses arranged in a hexagonal structure (see Fig. 3), 8-10 LEDs being used for each Fresnel lens, which LEDs are provided on a customary PCB (printed circuit board) structure.
  • Fig. 5A-D various light contour lines in the x-z plane are shown, which are caused by one or more opto-electronic elements in different positions with respect to the optical axis of the collimating element with which the opto-electronic element or optoelectronic elements is (are) associated. Lines of at least substantially equal illuminance correspond to the light contour lines.
  • the optical axis of the collimating element extends perpendicularly to the x-z plane at the location of the intersection of the x-axis and the z-axis.
  • Fig. 5 A one light-emitting diode (LED) 105, as used in the known luminaire, is shown, said LED being positioned on the optical axis of the Fresnel lens with which the LED is associated.
  • the light contours comprise concentric circles with the optical axis of the Fresnel lens as the imaginary center. If the LED is arranged in the focus of the Fresnel lens, the Fresnel lens emits a substantially parallel light beam. If the LED is arranged at a distance which is substantially larger or smaller than the focal distance of the Fresnel lens, said Fresnel lens emits a converging or diverging light beam.
  • Fig. 5B shows one LED 106 in accordance with the invention which is eccentrically positioned with respect to the optical axis of the Fresnel lens with which the LED is associated.
  • the light contours comprise concentric circles with the LED as the imaginary center. If the LED is arranged at a distance from the Fresnel lens equal to the focal distance of the Fresnel lens, said Fresnel lens emits a substantially parallel light beam at a certain angle. If the LED is arranged at a distance which is substantially larger or smaller than the focal distance of the Fresnel lens, said Fresnel lens emits a converging or diverging light beam at a specific angle. Such light beams are alternatively referred to as pre-directed light beams. The off-axis position of the LED determines the direction of the light beam.
  • Fig. 5C shows the light contour lines as caused by two LEDs 107, 107', which, in accordance with the invention, are eccentrically positioned with respect to the optical axis of the Fresnel lens with which the LEDs are associated.
  • the light contours comprise symmetric contour lines. The arrangement of the LEDs with respect to each other and the distance between the LEDs determine the shape of the beam.
  • Fig. 5D shows the light contour lines as caused by three LEDs 108, 108', 108" which, in accordance with the invention, are eccentrically positioned with respect to the optical axis of the Fresnel lens with which the LEDs are associated.
  • one of the LEDs is placed on the optical axis of the Fresnel lens.
  • the light contours comprise symmetric contour lines. The arrangement of the LEDs with respect to each other and the distance between the LEDs determine the shape of the beam.
  • optical axes of the collimating elements do not necessarily have to extend parallel to each other.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Led Device Packages (AREA)

Abstract

La présente invention concerne un éclairage comportant un logement (2) pourvu d'une fenêtre d'émission de lumière (3). Ce logement (2) comporte un groupe de plusieurs éléments optoélectroniques (5, 5', ...; 6, 6', ...; 7, 7', ...) et un groupe de plusieurs éléments collimateurs (15; 16; 17). Lorsque cet éclairage est en marche, les éléments optoélectroniques (5, 5', ...; 6, 6', ...; 7, 7', ...) émettent une lumière visible. Chacun des éléments collimateurs (15; 16; 17) présente un axe optique (25; 26; 27) et est associé à un élément optoélectronique (5, 5', ...; 6, 6', ...; 7, 7', ...). Selon cette invention, l'élément optoélectronique (5; 6; 7) est placé sensiblement excentré par rapport à l'axe optique (25; 26; 27) de l'élément collimateur (15; 16; 17) avec lequel il est associé. De préférence, au moins un autre élément optoélectronique (5'; 6'; 7') est associé à au moins un élément collimateur (15; 16; 17). Ledit élément optoélectronique (5'; 6'; 7') est soit placé sensiblement excentré soit coïncide avec l'axe optique (25; 26; 27) de l'élément collimateur (15; 16; 17) avec lequel il est associé. De préférence, les axes optiques (25; 26; 27) des éléments collimateurs (15; 16; 17) sont dirigés de manière à être sensiblement parallèles les uns par rapport aux autres. De préférence, les éléments collimateurs (15; 16; 17) sont des lentilles Fresnel et les éléments optoélectroniques (5, 5', ...; 6, 6', ...; 7, 7', ...) sont des diodes électroluminescentes.
EP00943929A 1999-07-02 2000-06-28 Eclairage et feux de signalisation Withdrawn EP1110027A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00943929A EP1110027A1 (fr) 1999-07-02 2000-06-28 Eclairage et feux de signalisation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP99202164 1999-07-02
EP99202164 1999-07-02
PCT/EP2000/006038 WO2001002771A1 (fr) 1999-07-02 2000-06-28 Eclairage et feux de signalisation
EP00943929A EP1110027A1 (fr) 1999-07-02 2000-06-28 Eclairage et feux de signalisation

Publications (1)

Publication Number Publication Date
EP1110027A1 true EP1110027A1 (fr) 2001-06-27

Family

ID=8240406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00943929A Withdrawn EP1110027A1 (fr) 1999-07-02 2000-06-28 Eclairage et feux de signalisation

Country Status (4)

Country Link
EP (1) EP1110027A1 (fr)
JP (1) JP2003503827A (fr)
TW (1) TW567449B (fr)
WO (1) WO2001002771A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410711B (de) * 1999-10-08 2003-07-25 Swarco Futurit Verkehrssignals Signalgeberoptik mit led-reihen
DE10142582B4 (de) * 2001-08-31 2006-10-26 Signalbau Huber Gmbh Leuchtmittel-Signalelement, Lichtsignalvorrichtung und Lichtsignalsystem
ITRM20020331A1 (it) * 2002-06-12 2003-12-12 Tecnologie Meccaniche S R L Dispositivo di segnalazione ottica a led, in particolare per uso ferroviario.
JP4873683B2 (ja) * 2005-04-19 2012-02-08 チェイル インダストリーズ インコーポレイテッド 面光源装置
JP5324259B2 (ja) * 2009-03-02 2013-10-23 株式会社光電器製作所 照明器具
DE102009047882A1 (de) * 2009-09-30 2011-03-31 Osram Opto Semiconductors Gmbh LED-Verkehrssignal
JP5786779B2 (ja) * 2012-03-26 2015-09-30 株式会社デンソーウェーブ 光学的情報読取装置
US9217551B2 (en) 2013-12-05 2015-12-22 Martin Professional Aps Light collector with a plurality of merged lenslets having different optical power
CN104696882B (zh) * 2013-12-05 2019-11-26 哈曼专业丹麦公司 在光源与小透镜之间具有不同距离的照明装置
US9752748B2 (en) * 2013-12-05 2017-09-05 Martin Professional Aps Projecting light fixture with a plurality of lenslets packed in an optimized dense circular pattern
KR102722897B1 (ko) * 2022-02-15 2024-10-25 호원대학교산학협력단 횡단보도용 신호등

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA174989A (de) * 1989-07-20 1999-06-15 Zelisko Josef Elektro Masch Signalanordnung mit einem strahler
FR2740535B1 (fr) * 1995-10-25 1997-12-26 Socop Sa Surface eclairante pour feux de signalisation
ATE236821T1 (de) * 1997-09-04 2003-04-15 Howells Railway Products Ltd Verkehrslichtsignal mit mehreren leuchtdioden

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0102771A1 *

Also Published As

Publication number Publication date
JP2003503827A (ja) 2003-01-28
WO2001002771A1 (fr) 2001-01-11
TW567449B (en) 2003-12-21

Similar Documents

Publication Publication Date Title
KR101260910B1 (ko) 고체 상태 광원 및 이를 이용한 차량 램프 시스템
US7431486B2 (en) LED assembly for rear lamps in an automobile
US7134775B2 (en) Vehicular headlamp and light-emitting module therefor
US8556480B2 (en) Vehicle headlight
US6805476B2 (en) Led-type vehicular lamp having uniform brightness
US8256943B2 (en) Vehicle light
US20040114366A1 (en) Large area shallow-depth full-fill LED light assembly
EP2019257A1 (fr) Ensemble d'éclairage de véhicule et lentille de guidage lumineux à utiliser dans un ensemble d'éclairage de véhicule
US20020044454A1 (en) Light-emitting diode combination marker/clearance lamp for trucks and trailers
CN107110460A (zh) 发光器
EP1598593B1 (fr) Phare de véhicule
EP4174368B1 (fr) Dispositif d'éclairage de véhicule
US20160369969A1 (en) Vehicle combination lamp
US7341366B2 (en) Projector type vehicle headlamp unit
JP7757355B2 (ja) 多光源照明モジュール及びその自動車用灯火器
GB2412724A (en) LED headlamp with different light intensity modules
WO2001002771A1 (fr) Eclairage et feux de signalisation
JP7458238B2 (ja) 車両用灯具
US10458618B2 (en) Lighting appliance for engine vehicles
CN209926250U (zh) 用于车辆的前照灯
EP3181995A1 (fr) Dispositif électroluminescent et appareil d'éclairage pour véhicules comprenant celui-ci
US20030072165A1 (en) Light for an aircraft
KR200325478Y1 (ko) 간접 조명을 이용한 차량용 ｌｅｄ램프의 구조
KR102872318B1 (ko) 차량용 램프
JP4158140B2 (ja) 車両用灯具

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20010711

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: 20040202

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB