EP1798467A1 - Projection lighting device - Google Patents

Projection lighting device Download PDF

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Publication number
EP1798467A1
EP1798467A1 EP05027317A EP05027317A EP1798467A1 EP 1798467 A1 EP1798467 A1 EP 1798467A1 EP 05027317 A EP05027317 A EP 05027317A EP 05027317 A EP05027317 A EP 05027317A EP 1798467 A1 EP1798467 A1 EP 1798467A1
Authority
EP
European Patent Office
Prior art keywords
lens
light
reflection member
light source
source unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05027317A
Other languages
German (de)
French (fr)
Other versions
EP1798467B1 (en
Inventor
Hsiang-Chen TYC Brother Industrial Co. Ltd. Wu
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.)
TYC Brother Industrial Co Ltd
Original Assignee
TYC Brother Industrial Co Ltd
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 TYC Brother Industrial Co Ltd filed Critical TYC Brother Industrial Co Ltd
Priority to AT05027317T priority Critical patent/ATE386234T1/en
Priority to DE602005004802T priority patent/DE602005004802T2/en
Priority to EP05027317A priority patent/EP1798467B1/en
Publication of EP1798467A1 publication Critical patent/EP1798467A1/en
Application granted granted Critical
Publication of EP1798467B1 publication Critical patent/EP1798467B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • 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 relates to a projection lighting device, and more particularly, to a compact vehicle lighting device using light emitting diodes.
  • a conventional projection lighting device 1 for vehicles is shown in Figs. 1 and 2, and generally includes a light source unit 11 having a bulb 111 and a reflection member 112 wherein the bulb 111 is located at a first focus 2 of the reflection member 112 and the light beams from the bulb 111 are reflected by the reflection member 112 and focused at a second focus 3 and then go through the lens 12.
  • the present invention intends to provide a compact sized lighting device using light emitting diodes.
  • the present invention relates to a projection lighting device that comprises a light source unit having a board having at least two light emitting diodes connected thereto.
  • a reflection member is put on designed position with respect to the board and includes at least two curve inner peripheries and the light emitting diodes are located within the at least two curve inner peripheries correspondingly.
  • Two first flat surfaces are defined in two ends of the reflection member.
  • a lens is connected to the light source unit and has at least two continuous curve surfaces. The lens has at least two continuous curve top edges and at least two continuous curve bottom edges.
  • Two second flat surfaces are defined in two ends of the lens.
  • the projection head light device of the present invention comprises a light source unit 51 and a lens 52, wherein the light source unit 51 includes a board 511 and two light emitting diodes 512 connected thereto.
  • a reflection member 513 is put on designed position with respect to the board 511 and includes two curve inner peripheries, the light emitting diodes 512 are located within the two curve inner peripheries correspondingly so that the light beams from the light emitting diodes 512 are reflected by the curve inner peripheries which will be defined specifically later.
  • Two first flat surfaces 5132 are defined in two ends of the reflection member 5113.
  • the lens 52 is connected to the light source unit 51 and has two continuous curve surfaces 521.
  • the lens 52 has continuous curve top edges 522 and at least two continuous curve bottom edges 523.
  • Two second flat surfaces 524 are defined in two ends of the lens 52.
  • the lens 52 can be an aspherical lens or a Fresnel lens.
  • Fig. 7 shows the vertical cross section of the reflection member 513, the light beams from the light emitting diodes 512 are reflected by the polyellipsoid reflection surface and focused at the focus 6 of the lens 52. The light beams then go through the lens 52 or even through the top edges 522 and the bottom edges 523 of the lens 52.
  • Figs. 9 and 10 show another embodiment of the present invention wherein there is a plate 7 located between the light source unit 51 and the lens 52, wherein the plate 7 can block a part of the light beams so as to form the high beam and short beam when using for a vehicle head light device.
  • the lens 52 and the reflection member 513 each have two flat surfaces 5132, 524 so that the area that the lighting device occupies is reduced and more lenses 52 can be arranged in a limited area and which means more light emitting diodes 512 are installed in the head light device. Because the illumination at wider angles are weak so that the narrower lenses 52 and reflection members 513 do not affect the illumination of the lighting device.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

A projection lighting device (5) includes a light source unit (51) having at least two frames each with a light emitting diode (512) and a reflection member (513) is connected to the light source unit. The reflection member includes at least two polyellipsoid surfaces (5131) so as to reflect the light beams from the light emitting diodes. The reflection member has two first flat surfaces (5132) in two ends thereof. A lens (52) is connected to the light source unit and has two second flat surfaces (524) in two ends thereof. The light source units can be arranged to be close to each other, the reflection member and the lens each have two flat surfaces such that the lighting device is compact in size.

Description

  • The present invention relates to a projection lighting device, and more particularly, to a compact vehicle lighting device using light emitting diodes.
  • A conventional projection lighting device 1 for vehicles is shown in Figs. 1 and 2, and generally includes a light source unit 11 having a bulb 111 and a reflection member 112 wherein the bulb 111 is located at a first focus 2 of the reflection member 112 and the light beams from the bulb 111 are reflected by the reflection member 112 and focused at a second focus 3 and then go through the lens 12.
  • Thanks to the modem industry of semi-conductive chips, light emitting diodes are developed to a new level and able to provide high illumination with less energy consuming. The light emitting diodes are small and light in weight, have short response time and bear vibration. The light emitting diodes are used to be lighting device recently. As shown in Fig. 3, the projection lighting device 4 includes a light source unit 41 and a lens 42, wherein the light source unit 41 includes a board 411 and the light emitting diode 412 is connected to board 411, and a reflection member 41 is put on the designed position with respect to the board 411. However, multiple sets of the light source units 41 have to be used to provide a required quality light output for the vehicle lighting device. The multiple sets of the light source units 41 occupy too much space.
  • The present invention intends to provide a compact sized lighting device using light emitting diodes.
  • The present invention relates to a projection lighting device that comprises a light source unit having a board having at least two light emitting diodes connected thereto. A reflection member is put on designed position with respect to the board and includes at least two curve inner peripheries and the light emitting diodes are located within the at least two curve inner peripheries correspondingly. Two first flat surfaces are defined in two ends of the reflection member. A lens is connected to the light source unit and has at least two continuous curve surfaces. The lens has at least two continuous curve top edges and at least two continuous curve bottom edges. Two second flat surfaces are defined in two ends of the lens.
  • The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
    • Fig. 1 is an exploded view to show a lens and a conventional head light device;
    • Fig. 2 shows the light beams are reflected by the reflection member of the conventional lighting device;
    • Fig. 3 shows a conventional head light device including multiple sets of light emitting diodes;
    • Fig. 4 is an exploded view to show the head light device of the present invention;
    • Fig. 5 is another exploded view to show the head light device of the present invention;
    • Fig. 6 shows the relationship between the illumination of a light emitting diode and angles that the light beams orientate;
    • Fig. 7 shows a vertical cross sectional view of the reflection member and the paths that the light beams are reflected;
    • Fig. 8 shows a horizontal cross sectional view of the reflection member and the paths that the light beams are reflected;
    • Fig. 9 shows a plate is located between the light source unit and the lens, and
    • Fig. 10 shows that a part of the light beam is blocked by the plate.
  • Referring to Figs. 3 to 5, the projection head light device of the present invention comprises a light source unit 51 and a lens 52, wherein the light source unit 51 includes a board 511 and two light emitting diodes 512 connected thereto. A reflection member 513 is put on designed position with respect to the board 511 and includes two curve inner peripheries, the light emitting diodes 512 are located within the two curve inner peripheries correspondingly so that the light beams from the light emitting diodes 512 are reflected by the curve inner peripheries which will be defined specifically later. Two first flat surfaces 5132 are defined in two ends of the reflection member 5113.
  • The lens 52 is connected to the light source unit 51 and has two continuous curve surfaces 521. The lens 52 has continuous curve top edges 522 and at least two continuous curve bottom edges 523. Two second flat surfaces 524 are defined in two ends of the lens 52. The lens 52 can be an aspherical lens or a Fresnel lens.
  • As shown in Fig. 6 which shows the relationship between the illumination of the light emitting diode 512 and angles that the light beams orientate. It is clear that the illumination of the light beams are high at the center of light output direction, for example, range from -40 degrees to +40 degrees, and the wider the angle is, the less illumination the beams is. In other words, the illumination on wider angles can be omitted when using the light emitting diodes 512 to a vehicle lighting device. In order to obtain a beam that meets regulations for vehicle lighting devices, the reflection member 513 includes different horizontal cross section and vertical cross section. The reflection surface 5131 comprises multiple focuses and this multiple-focus surface 5131 is polyellipsoid reflection surface.
  • Fig. 7 shows the vertical cross section of the reflection member 513, the light beams from the light emitting diodes 512 are reflected by the polyellipsoid reflection surface and focused at the focus 6 of the lens 52. The light beams then go through the lens 52 or even through the top edges 522 and the bottom edges 523 of the lens 52.
  • Fig. 8 shows the horizontal cross section of the reflection member 513, the light beams from the light emitting diodes 512 are reflected by the polyellipsoid reflection surface and focused at a remote distance via the lens 52. The light beams reflected by the vertical cross section and the horizontal cross section are combined to form a wide and flat range of light beam which is perfect for the head light device of vehicles.
  • Figs. 9 and 10 show another embodiment of the present invention wherein there is a plate 7 located between the light source unit 51 and the lens 52, wherein the plate 7 can block a part of the light beams so as to form the high beam and short beam when using for a vehicle head light device.
  • The lens 52 and the reflection member 513 each have two flat surfaces 5132, 524 so that the area that the lighting device occupies is reduced and more lenses 52 can be arranged in a limited area and which means more light emitting diodes 512 are installed in the head light device. Because the illumination at wider angles are weak so that the narrower lenses 52 and reflection members 513 do not affect the illumination of the lighting device.
  • While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims (4)

  1. A projection lighting device comprising:
    a light source unit having a board and at least two light emitting diodes connected thereto, a reflection member put on designed position with respect to the board and including at least two curve inner peripheries, the light emitting diodes located within the at least two curve inner peripheries correspondingly, two first flat surfaces defined in two ends of the reflection member, and
    a lens connected to the light source unit and having at least two continuous curve surfaces, the lens having at least two continuous curve top edges and at least two continuous curve bottom edges, two second flat surfaces defined in two ends of the lens.
  2. The device as claimed in claim 1, wherein the lens is an aspherical lens.
  3. The device as claimed in claim 2, wherein the lens is a Fresnel lens.
  4. The device as claimed in claim 1 further comprising a plate located between the light source unit and the lens.
EP05027317A 2005-12-14 2005-12-14 Projection lighting device Not-in-force EP1798467B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT05027317T ATE386234T1 (en) 2005-12-14 2005-12-14 PROJECTION LIGHTING DEVICE
DE602005004802T DE602005004802T2 (en) 2005-12-14 2005-12-14 Projection lighting device
EP05027317A EP1798467B1 (en) 2005-12-14 2005-12-14 Projection lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05027317A EP1798467B1 (en) 2005-12-14 2005-12-14 Projection lighting device

Publications (2)

Publication Number Publication Date
EP1798467A1 true EP1798467A1 (en) 2007-06-20
EP1798467B1 EP1798467B1 (en) 2008-02-13

Family

ID=35658931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05027317A Not-in-force EP1798467B1 (en) 2005-12-14 2005-12-14 Projection lighting device

Country Status (3)

Country Link
EP (1) EP1798467B1 (en)
AT (1) ATE386234T1 (en)
DE (1) DE602005004802T2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20100336A1 (en) * 2010-03-02 2011-09-03 Ecie Electric Components And Instruments Europ MULTIFUNCTION LED PROJECTOR FOR TWO-WHEEL VEHICLES
FR3006744A1 (en) * 2013-06-06 2014-12-12 Valeo Vision OPTICAL DEVICE, IN PARTICULAR FOR A DEVICE FOR LIGHTING AND / OR SIGNALING A MOTOR VEHICLE, AND LIGHTING AND / OR SIGNALING DEVICE COMPRISING SUCH A DEVICE
JP2016024973A (en) * 2014-07-22 2016-02-08 市光工業株式会社 Vehicular lighting tool
DE102007040760B4 (en) * 2007-08-29 2016-03-24 Automotive Lighting Reutlingen Gmbh Projection module of a vehicle headlight
CN110462482A (en) * 2017-03-17 2019-11-15 亮锐控股有限公司 Multifocal collimation lens and headlamp assembly for automobile short-distance
WO2020025171A1 (en) * 2018-07-31 2020-02-06 Valeo Vision Luminous module that images the illuminated surface of a collector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008049168A1 (en) * 2008-09-26 2010-04-01 Hella Kgaa Hueck & Co. Projection body for headlight of motor vehicle, has primary part formed as three-axis ellipsoid body, where projection body is geometrically designed so that light exhibits collimation in collimation plane and scattering in scattering plane
FR3028007A1 (en) * 2014-10-29 2016-05-06 Peugeot Citroen Automobiles Sa VEHICLE PROJECTOR
DE102018105720B4 (en) * 2018-03-13 2019-10-24 Automotive Lighting Reutlingen Gmbh Light module for motor vehicle headlights

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030072167A1 (en) * 2001-09-27 2003-04-17 Pierre Albou Elliptical headlamp including a secondary optical system
WO2004031649A1 (en) * 2002-10-01 2004-04-15 Truck-Lite Co., Inc. Light emitting diode headlamp and headlamp assembly
WO2005036054A1 (en) * 2003-10-10 2005-04-21 Federal Signal Corporation Light assembly
EP1598593A2 (en) * 2004-05-18 2005-11-23 Ichikoh Industries, Ltd. Headlamp unit for vehicle and headlamp unit assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030072167A1 (en) * 2001-09-27 2003-04-17 Pierre Albou Elliptical headlamp including a secondary optical system
WO2004031649A1 (en) * 2002-10-01 2004-04-15 Truck-Lite Co., Inc. Light emitting diode headlamp and headlamp assembly
WO2005036054A1 (en) * 2003-10-10 2005-04-21 Federal Signal Corporation Light assembly
EP1598593A2 (en) * 2004-05-18 2005-11-23 Ichikoh Industries, Ltd. Headlamp unit for vehicle and headlamp unit assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 18 5 June 2001 (2001-06-05) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007040760B4 (en) * 2007-08-29 2016-03-24 Automotive Lighting Reutlingen Gmbh Projection module of a vehicle headlight
ITMI20100336A1 (en) * 2010-03-02 2011-09-03 Ecie Electric Components And Instruments Europ MULTIFUNCTION LED PROJECTOR FOR TWO-WHEEL VEHICLES
EP2366612A1 (en) * 2010-03-02 2011-09-21 Ecie Electric Components, and Instruments Europe S.R.L. Headlamp for two-wheel vehicles
FR3006744A1 (en) * 2013-06-06 2014-12-12 Valeo Vision OPTICAL DEVICE, IN PARTICULAR FOR A DEVICE FOR LIGHTING AND / OR SIGNALING A MOTOR VEHICLE, AND LIGHTING AND / OR SIGNALING DEVICE COMPRISING SUCH A DEVICE
JP2016024973A (en) * 2014-07-22 2016-02-08 市光工業株式会社 Vehicular lighting tool
CN110462482A (en) * 2017-03-17 2019-11-15 亮锐控股有限公司 Multifocal collimation lens and headlamp assembly for automobile short-distance
US11067725B2 (en) 2017-03-17 2021-07-20 Lumileds Llc Multi-focal collimating lens and headlight assembly for an automotive low beam
WO2020025171A1 (en) * 2018-07-31 2020-02-06 Valeo Vision Luminous module that images the illuminated surface of a collector
US11280464B2 (en) 2018-07-31 2022-03-22 Valeo Vision Luminous module that images the illuminated surface of a collector
US11719406B2 (en) 2018-07-31 2023-08-08 Valeo Vision Luminous module that images the illuminated surface of a collector

Also Published As

Publication number Publication date
ATE386234T1 (en) 2008-03-15
EP1798467B1 (en) 2008-02-13
DE602005004802T2 (en) 2009-03-05
DE602005004802D1 (en) 2008-03-27

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