CN105757469A - LED traffic signal and optical element therefor - Google Patents
LED traffic signal and optical element therefor Download PDFInfo
- Publication number
- CN105757469A CN105757469A CN201610136271.9A CN201610136271A CN105757469A CN 105757469 A CN105757469 A CN 105757469A CN 201610136271 A CN201610136271 A CN 201610136271A CN 105757469 A CN105757469 A CN 105757469A
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- China
- Prior art keywords
- optical element
- light
- light source
- lens
- axis
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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
- F21V5/00—Refractors for light sources
- F21V5/008—Combination of two or more successive refractors along an optical axis
-
- 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
- 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
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to an LED traffic signal and an optical element therefor. A lighting device includes a housing having an open end and a geometrical axis and at least one light source disposed along an optical axis. The lighting device further includes an outer optical element having a focal point and closing the open end of the housing, the optical element comprising a converging outer surface and a diverging inner surface that cooperates with the light coming from the inner optical element. Additionally, the lighting device includes an inner optical element between the light source and the outer optical element, the inner optical element redirecting light from a light source that is offset from the focal point toward the outer optical element.
Description
U. S. application corresponding to this application is the part continuation application of the PCT application PCT/US2009/056029 that in JIUYUE, 2009 of the rights and interests requiring the U.S. Provisional Application number 61/094,253 submitted to for 4th JIUYUE in 2008 are submitted on the 4th.
Technical field
It relates to illuminator.More specifically, it relates to for controlling to be derived from the efficient signal lamp of the light of relatively small light source.
Background technology
Signal sends the present construction of lamp and allows by adopting multiple lens to control light, and these multiple lens include the first collecting lens and the second diverging lens (referring to Fig. 1).Such as, U.S. Patent number 5,947,587 (it is incorporated herein by reference) discloses the signal lights including box-shaped enclosure 1, and this box-shaped enclosure 1 has the opening 2 closed by extended window 3.LED4 is gathered in around the central axis 6 of shell 1 and plus lens 7 (it is described as Fresnel lens) inserts between this extended window and LED.
LED4 is arranged in the array of the surface area of 25% with the surface area being Fresnel lens 7.Fresnel lens 7 play convergent beam pattern effect and then extended window 3 spread light.Two optical elements (that is, Fresnel lens and extended window) are used to cause the light loss by the two optics.Furthermore, it is necessary to manufacture two independent opticses and assemble them into signal lights, which increase manufacturing cost and the efficiency of LED signal device.
Therefore, development before converging light spread light in case control light spread show up on use simultaneously less plastic components efficient signal send lamp, this is desirable.
Summary of the invention
Illuminator is provided in one embodiment.This illuminator includes having the shell of opening, closes this opening of this shell and include assembling the refraction optical element of outer surface and diffusive inner surface, and the light source coordinated with this refraction optical element.This light source is arranged near the focus of this refraction optical element.This optical element can include inner surface, and it has the reference plane orthogonal with the track injecting light.Alternatively, this optical element can include collimating lens, and this internal surface configurations is plane and orthogonal with the light sent from light source, and this outer surface is configured to redirect the beam pattern that light generally collimates with offer.
In another embodiment, it is provided that illuminator.This illuminator includes the shell with opening and geometrical axis and at least one light source arranged along optical axis.This illuminator farther includes outer optical element, and it has focus and closes the opening of this shell, and this optical element includes the diffusive inner surface assembled outer surface and coordinate with the light being derived from interior optical element.It addition, this illuminator includes the interior optical element between light source and outer optical element, this interior optical element is in the future since focal shift light source light optical element outwardly redirects.Outer and inner optical element can be rotationally symmetrical about geometrical axis.The inner surface of interior optical element can be many facets type, and the outer surface of outer optical element can be smooth.Light source can include the first and second light sources, and this first light source is arranged closer to interior optical element than this secondary light source.Outer optical element can be configured to coordinate with secondary light source provide the beam pattern generally collimated.
In still another embodiment of the invention, it is provided that illuminator.This illuminator includes shell and at least two collecting lens with opening.Position a collecting lens collect the light from light source major part and position another collecting lens come enclosed signal lamp opening and for given specification spread light.Alternatively, at least one light source has geometrical axis along optical axis setting and shell.
In still another embodiment of the invention, it is provided that illuminator.This illuminator includes having the shell of opening, light source and collecting lens.This collecting lens includes the incidence surface of bending, total internal reflection surface and exiting surface, and wherein the incidence surface of this bending is configured to from the light of light source towards the centre convergence of this total internal reflection surface.
Accompanying drawing explanation
Fig. 1 is the schematic section of the signal lights of prior art.
Fig. 2 is the schematic section of the signal lights with the plus lens with distally convergence surface.
Fig. 3 is the schematic section of the second embodiment of the signal lights with the plus lens with the many facets type inner surface that can mold.
Fig. 4 A coordinates the schematic diagram for two optical elements used in the 3rd embodiment of novel signal lights with light source.
Fig. 4 B coordinates the alternate schematic for two optical elements used in the embodiment of novel signal lights with light source.
Fig. 5 is the side view of the lens coordinated with light source that figure 3 illustrates.
Fig. 6 is the optical analog ray tracing screenshot capture of the optical element that figure 5 illustrates.
Fig. 7 is the schematic vertical cross-section figure of the distribution curve with reference to internal reference plane.
Fig. 8 is the partial side elevation view of the exemplary lens of the aspect according to the disclosure.
Fig. 9 is the cross-section ray plot of the TIR element of the incidence surface embodiment illustrating bending.
Figure 10 is the cross-section ray plot of the TIR element with mould processing fillet.
Figure 11 is the schematic section of the signal lights of the aspect according to the disclosure.
Detailed description of the invention
Being now described with reference to the drawings one or more realizations of the disclosure, wherein similar label is for referring to all similar elements.
Fig. 2 discloses signal lights 8, and this signal lights 8 includes refraction optical element 10 (it is shown as collimating lens), and this refraction optical element 10 coordinates with the point source 12 of the focal point being positioned at this optical element.This collimating lens 10 includes inner surface 14 and outer surface 16.This inner surface 14 is shaped to so that it is orthogonal with the light 18 sent from point source 12 so that these are injected light and minimum refraction occur at this inner surface 14 place or does not reflect.Outer surface 16 is configured to redirect light provides the beam pattern generally collimating (parallel or less parallel).Such as, the major part of light situation in about 20 ° of beam angles is considered as suitable for being formed the beam pattern of approximate collimation (less parallel).
Fig. 2 also schematically depict the supporting 22 for multiple LED24.Virtual point source 12 (As mentioned above) is arranged on the focal point of lens 10.Supporting 22 (they are printed circuit board (PCB)s in the embodiment described) is from the focus inward deflection of collimating lens 10 and is in and is perpendicular to central axis 26.LED24 is gathered in around the central axis 26 of collimating lens 10, and this central axis 26 can also be the central axis of signal lights shell 28 (it includes LED24 and collimating lens 10).The shell 28 of signal lights has the opening closed by collimating lens 10.Support the sufficiently close together central axis of LED24 26 on 22 and inwardly arrange to produce the beam pattern similar to the beam pattern produced by virtual point source 12 from the focus of lens 10.
Fig. 3 depicts the alternative of signal lights 48.Fig. 3 depicts refraction optical element 50, and it coordinates with the virtual point source 52 of the focal point being arranged on this optical element.Lens 50 can be rotationally symmetrical about central axis 66.If it is desire to form asymmetric beam pattern, then the inner surface 54 of lens 50 can adopt the pattern of such as round or linear (square or rhombus) pattern to arrange.Optical element 50 includes inner surface 54 and outer surface 56.Compared with embodiment shown in figure 2, inner surface 54 and Fresnel lens (wherein inner surface is many facets type) similarly configure.But, inner surface 54 adopt can inject in week molding the such mode of refraction optical element 50 form many facets type.Do so, the part of the generally level of each facet (the every orientation that figure 3 illustrates) is at least substantially parallel to the central axis 66 of optical element 50 and signal indicator shell 68 or makes optical element 50 can eject from mould at an angle.Such as, each faceted horizontal component 58 tilts from innermost edge 62 parallel deviate of horizontal component in the line (consistent with the direction ejected from mould) of central axis 66 on the direction towards the outermost edge 60 of horizontal component.
Each facet also includes generallyperpendicular part 64 and is reflected towards the outer surface 56 of optical element 50 by light.Outer surface 56 is configured to make beam pattern narrow.If surface 54 is orthogonal with the light being derived from point source, outer surface 56 (similar with above-described outer surface 16) is configured to redirect light and produces generally to collimate the beam pattern of (parallel or less parallel).Such as, the major part of light situation in about 20 ° of beam angles is considered as suitable for being formed the beam pattern of approximate collimation (less parallel).Develop asymmetric light beam to describe below with regard to Fig. 7.
Fig. 3 depicts the supporting 72 being arranged in shell 68 and the multiple LED74 arranging in this supporting.Similar to embodiment shown in figure 2, LED74 and supporting 72 are spaced inward from the virtual point source 52 of lens 50.Supporting 72 can be printed circuit board (PCB) and be in and be generally perpendicular to central axis 66.LED74 is gathered in central axis 66 around.Similar with U.S. Patent number 5,974,587, the surface area of the area of coverage of LED74 can be about the 25% of the surface area of refraction optical element 50.
Fig. 3 discloses light 76, and it sends from the virtual point source of the focus 52 being arranged on refraction optical element 50.By by spaced inward from focus 52 towards refraction optical element 50 to LED74 and supporting 72, following and the path being substantially the same for the light 76 shown in virtual point source 52 from the LED light sent.
Fig. 5 discloses the side view of the lens 90 coordinated with single optical element 92 and the light 94 that sends from this single optical element that figure 3 illustrates.Similar to above-described virtual point source, this single optical element 92 is in the focal point of lens 90.Adopting the mode similar to above-disclosed signal lights, multiple LED can be gathered in the central axis of lens 90, and the plurality of LED produces to approach the beam pattern of the beam pattern shown in Fig. 5 from virtual focus point inward deflection.Fig. 5 depicts the beam pattern generally collimated more accurately, this is because light is not all of the beam pattern producing generally or generally to collimate all accurately parallel to each other but generally parallel to each other.Fig. 6 is the close-up view by Fig. 5 cross section taked.
Fig. 4 A depicts two refraction optical elements 100 and 102 and the schematic section of two virtual point source 104 and 106.Each point source 104 and 106 is arranged along axis 108, and this axis 108 is placed in the middle betwixt about both optical elements 100 and 102.Optical element 102 can be rotationally symmetrical about central axis 108.However, if it is desired to asymmetric beam pattern, optical element 100 can be not rotationally symmetrical about central axis 108.
Outer refraction optical element 100 includes interior many facets type surface 112 and outer smooth surface 114.This interior many facets type surface 112 is similar to reference to Fig. 3 many facets type surface described, this is because it is similar to Fresnel style but can be injected into molding.Outer optical element 100 is configured to the beam pattern generally collimated coordinating the embodiment provided and illustrate in figs 2 and 3 similar with farthest virtual point source 104.Similar to above-described optical element 10 and 50, the opening of outer optical element 100 enclosed signal lamp housing (not shown).
Interior optical element 102 is for forming the virtual over focus of optical element 100.Optical element 102 is additionally operable to improve the efficiency of signal lights by collecting the light of all or almost all of LED point light source.Optical element 102 reduces the thickness of signal lights.The optical element that figure 3 illustrates is shown as plus lens；But, optical element can be designed to refracting element, diffraction element, internal refraction element and/or reflecting element.
Interior optical element 102 is configured to coordinate with the virtual point source 106 closer to both interior optical element 102 and outer optical element 100.Interior optical element 102 is configured to redirect so that injection light 124 generally follows the path identical with the light 126 sent from farthest virtual point source 104 light 122 of injecting from point source 106.By providing other interior optical element 102, the degree of depth of shell can reduce due to the redirecting of light that provided by interior optical element 102.It is therefore possible to use provide LED to reference to Fig. 2 and 3 those similar modes described from virtual point source 106 inside (namely towards optical element 102 and 100).Similar to above-described shell 28 and 68, optical element 100 and 102 can be arranged on inside shell (not shown).
Fig. 4 B and Fig. 4 A is similar and illustrates that outer refraction optical element 100 and interior optical element 102 can jointly play the effect of a pair collecting lens.More specifically, interior optical element 102 is collected the major part of the light from point source 104 and simulates the focus for outer refraction optical element 100.Outer refraction optical element 100 generally includes the pin optics (pinoptics) of complexity, and the light from point source is spread to given specification by it, and each of which pin has the shape of uniqueness.Fig. 4 B includes many other lines 128, and it illustrates that light is collimation when it penetrates outer refraction optical element 100.Therefore, even if when " housing " (that is, outer refraction optical element 100) spreads light for given specification, beam pattern becomes narrower after each lens.
Fig. 7 demonstrates control light to produce asymmetric beam pattern.Outer surface 134 represents the outer surface of optical element, and it is similar to reference to Fig. 4 outer surface 114 described.Reference surface 131 to reference to Fig. 4 describe inner surface 112 and to reference to Fig. 3 describe inner surface 64 similar.Inject light 132 similar to reference to Fig. 4 light 124 described.In order to form asymmetric beam pattern, the distributed surface 130 of inner surface 131 replaces.This dissemination surface 130 is with the angular orientation identical with reference inner surface, and this causes that outer surface 134 transmits identical beam pattern facing to central axis 108.The interior dissemination surface 130 of lens (it is the optical element including outer surface 134 and interior dissemination surface 130) can adopt the pattern of such as round or linear (square or rhombus) pattern to arrange.In some instances, along trunnion axis, beam axis being moved down 5 ° of desired intensity providing signal lights, it be desirable for this to have been found that.In still another embodiment of the invention, the total internal reflection element 200 of LED signal device figure 8 illustrates.Total internal reflection (TIR) is wherein at given medium (such as, acrylic acid or makrolon material) in incide the phenomenon that the electromagnetic radiation (light) with the border relatively dredging medium (such as, air) is fully reflective from this border with the angle equal to or more than critical angle.Conventional ground in optical fiber technology and binocular prism, reflecting mirror/reflective coated surface that the optics of the correct design of use total internal reflection need not be expensive redirects light.Save to realize material in TIR element, may utilize a series of less continuous T IR faces rather than single big reflecting surface.When interface between continuous T IR face forms less desirable anaclasis, the interface between these faces little as far as possible (or sharp-pointed), this is desirable.
As figure 8 illustrates, the incidence surface 202 of multiple bendings aligns with corresponding multiple TIR faces 204 and exiting surface 206, and these multiple TIR faces 204 and exiting surface 206 make the light that the bottom from signal indicator sends redirect on generally downwardly direction.The incidence surface 202 of bending has the optical effect at the center, TIR face 204 that incident illumination focuses on correspondence, consequently allows for light and clashes into TIR face 204 from angle widely and be redirected to will pass through desired exiting surface 206 and project downwards.TIR element 200 can be configured with on exiting surface 206 staged configuration minimize space required for element 200 and material and other in.
Each direction surface thereof at next gradin of the incidence surface 202 of bending, this reduces, by reducing the optical region of the fillet between the gradin being exclusively used in incidence surface 202, the district causing light loss.Signal indicator can configure and be used for being attached to existing incandescent signal indicator shell.
Fig. 9 is the close-up view of a part for the TIR element 200 of Fig. 8.Incide the light 210 on incidence surface 202 preferably with lens axis parallel alignment, thus generally incide the TIR face 204 that all of light on incidence surface 202 is assembled and collided correspondence.The light 212 of injection exiting surface 206 is thus directed in a downward manner.
Figure 10 illustrates alternative TIR element 210, it also has the incidence surface 212 of multiple bending, the incidence surface 212 of these bendings aligns with corresponding multiple TIR faces 214 and exiting surface 216, and these multiple TIR faces 214 and exiting surface 216 make the light that the bottom from signal indicator sends redirect on generally downwardly direction.The incidence surface 212 of bending has the optical effect at the center, TIR face 214 that incident illumination focuses on correspondence, consequently allows for light and clashes into TIR face 214 from angle widely and be redirected to will pass through desired exiting surface 216 and project downwards.TIR element 210 can be configured with staged configuration on exiting surface 216.Each direction surface thereof at next gradin of the incidence surface 212 of bending, this reduces, by reducing the optical region of the fillet between the gradin being exclusively used in incidence surface 212, the district causing light loss.In this embodiment, the transition point place between the ladder of TIR face 214 and exiting surface 216 increases fillet 218.It is appreciated that generally there is fillet due to the geometry of the machining tool of mould or abrasion on the edge of staged optical element.Mould is processed the most sharp-pointed edge and can reduce the uncontrolled light produced by fillet, but it also can produce performance change in time due to die wear.Sharp-pointed edge also increases the fragility of the part being in shock and vibration place.
As figure 10 illustrates, incide the light 220 on incidence surface 212 preferably with lens axis parallel alignment, thus generally incide the TIR face 214 that all of light on incidence surface 212 is assembled and collided correspondence.The light 222 of injection exiting surface 216 is thus directed in a downward manner.
Referring now to Figure 11, in the alternative of signal lights, optical axis 302 is that the center of LED array 304 is to the phantom between the center of outer lens (or housing) 306.Note existing angle 308 between optical axis 302 and geometrical axis 310.This angle 308 between geometrical axis 310 and optical axis 302 depends on such as the center of the luminous flux determined by specification.Such as, when ITE (traffic engineering association) specification, the center of flux is under horizon about 5 degree.Therefore optical axis 302 will be lower approximate 5 degree than pointing to horizontal geometrical axis 310.Geometrical axis 310 is perpendicular to installs the phantom that the center of wheel rim (or shell) 312 is crossed.Figure 11 also illustrates that (it may also be asymmetric) about optical axis 302 symmetry optional interior lens 314.Recognize that the feature that figure 11 illustrates is applicable to the embodiment of previously described signal lights.
One exemplary embodiment describes with reference to preferred embodiment.It is apparent that when reading and understand detailed description above, amendment and change will be remembered by other people.Regulation one exemplary embodiment is construed to include all such amendments and change, as long as they are in the scope of the claim enclosed or its equivalent.
Claims (3)
1. an illuminator, including:
There is the shell (28 of opening and geometrical axis；68)；
At least one light source (304), it is arranged along optical axis, and described optical axis (302) is angled about described geometrical axis (310)；And
At least two collecting lens (306；314), wherein one, location collecting lens is collected the major part of the light from light source and positions another collecting lens to close the described opening of described signal lights and to spread described light for given specification.
2. an illuminator, including:
There is the shell of opening；
Light source；And
Collecting lens (200), it includes the incidence surface (202) of bending, total internal reflection surface (204) and exiting surface (206), and the incidence surface of wherein said bending is configured to from the light of described light source towards the centre convergence of described total internal reflection surface (204).
3. the illuminator as described in claim 1 or claim 2, it farther includes the supporting for multiple LED.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/040,874 US8668351B2 (en) | 2008-09-04 | 2011-03-04 | LED traffic signal and optical element therefor |
| US13/040874 | 2011-03-04 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100662239A Division CN102679207A (en) | 2011-03-04 | 2012-03-05 | LED traffic signal and optical element therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105757469A true CN105757469A (en) | 2016-07-13 |
Family
ID=45774097
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100662239A Pending CN102679207A (en) | 2011-03-04 | 2012-03-05 | LED traffic signal and optical element therefor |
| CN201610136271.9A Pending CN105757469A (en) | 2011-03-04 | 2012-03-05 | LED traffic signal and optical element therefor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100662239A Pending CN102679207A (en) | 2011-03-04 | 2012-03-05 | LED traffic signal and optical element therefor |
Country Status (2)
| Country | Link |
|---|---|
| EP (2) | EP2495489A3 (en) |
| CN (2) | CN102679207A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011054233B4 (en) * | 2011-10-06 | 2019-06-19 | HELLA GmbH & Co. KGaA | Transformation optics assembly |
| CN103343910A (en) * | 2013-07-25 | 2013-10-09 | 江西量一光电科技有限公司 | LED bulb lamp |
| CN105371231A (en) * | 2014-09-01 | 2016-03-02 | 鸿富锦精密工业（深圳）有限公司 | Lighting device |
| CN106523980B (en) * | 2015-09-11 | 2020-09-25 | 上海三思电子工程有限公司 | LED signal lamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040004836A1 (en) * | 2002-05-30 | 2004-01-08 | Eden Dubuc | Side projecting LED signal |
| CN201103852Y (en) * | 2007-09-12 | 2008-08-20 | 张红现 | Railway signal lamp head |
| WO2010028239A2 (en) * | 2008-09-04 | 2010-03-11 | Lumination Llc | Led traffic signal and optical element therefor |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB157070A (en) * | 1920-01-09 | 1921-12-22 | Mckenzie Holland And Westingho | Improvements in light projecting apparatus |
| JP2707391B2 (en) * | 1992-09-01 | 1998-01-28 | 株式会社小糸製作所 | Projector type headlight |
| JP4040688B2 (en) | 1996-10-16 | 2008-01-30 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Signal light with LED |
| WO1999011498A1 (en) * | 1997-09-04 | 1999-03-11 | Howells Railway Products Limited | Plural-led lights |
| AT409805B (en) * | 1999-12-09 | 2002-11-25 | Swarco Futurit Verkehrssignals | LEDS-SIGNAL OPTICS |
| JP3839235B2 (en) * | 2000-09-18 | 2006-11-01 | 株式会社小糸製作所 | Vehicle lighting |
| US6547423B2 (en) * | 2000-12-22 | 2003-04-15 | Koninklijke Phillips Electronics N.V. | LED collimation optics with improved performance and reduced size |
| JP2003123519A (en) * | 2001-10-15 | 2003-04-25 | Honda Motor Co Ltd | Projector type head lamp |
| US20050286145A1 (en) * | 2004-06-25 | 2005-12-29 | Swarco Futurit Verkehrssignalsysteme Ges.M.B.H. | Invention concerning a condensor lens |
| CN100507610C (en) * | 2006-05-29 | 2009-07-01 | 财团法人工业技术研究院 | Leaded light lens and luminous diode packaging structure having same |
| CN101556004A (en) * | 2008-04-07 | 2009-10-14 | 深圳市海洋王照明科技股份有限公司 | Projection lamp and lampshade thereof |
| DE102008020171B4 (en) * | 2008-04-22 | 2010-08-05 | Trw Automotive Electronics & Components Gmbh | Optical sensor device |
-
2012
- 2012-03-02 EP EP12157934.6A patent/EP2495489A3/en not_active Withdrawn
- 2012-03-02 EP EP14196410.6A patent/EP2881654A3/en not_active Withdrawn
- 2012-03-05 CN CN2012100662239A patent/CN102679207A/en active Pending
- 2012-03-05 CN CN201610136271.9A patent/CN105757469A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040004836A1 (en) * | 2002-05-30 | 2004-01-08 | Eden Dubuc | Side projecting LED signal |
| CN201103852Y (en) * | 2007-09-12 | 2008-08-20 | 张红现 | Railway signal lamp head |
| WO2010028239A2 (en) * | 2008-09-04 | 2010-03-11 | Lumination Llc | Led traffic signal and optical element therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2881654A2 (en) | 2015-06-10 |
| EP2881654A3 (en) | 2015-07-15 |
| CN102679207A (en) | 2012-09-19 |
| EP2495489A3 (en) | 2014-06-04 |
| EP2495489A2 (en) | 2012-09-05 |
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