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WO2015007597A1 - Lentille destinée à un dispositif d'éclairage, et dispositif d'éclairage comprenant cette lentille - Google Patents

Lentille destinée à un dispositif d'éclairage, et dispositif d'éclairage comprenant cette lentille Download PDF

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Publication number
WO2015007597A1
WO2015007597A1 PCT/EP2014/064751 EP2014064751W WO2015007597A1 WO 2015007597 A1 WO2015007597 A1 WO 2015007597A1 EP 2014064751 W EP2014064751 W EP 2014064751W WO 2015007597 A1 WO2015007597 A1 WO 2015007597A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
light
designed
incident
illuminating device
Prior art date
Application number
PCT/EP2014/064751
Other languages
English (en)
Inventor
Xueqin LIN
Original Assignee
Osram Gmbh
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 Osram Gmbh filed Critical Osram Gmbh
Publication of WO2015007597A1 publication Critical patent/WO2015007597A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0071—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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
    • F21Y2101/00—Point-like light sources
    • 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 lens for a illuminating device and an illuminating device comprising the same.
  • Solid-state lighting (SSL) devices use light emitting diodes (LEDs) and tend to evolve quickly and gradually replace tra ⁇ ditional lighting such as incandescent and fluorescent lamps.
  • LEDs have advantages such as low energy consumption and high efficiency, long lifetime and compact design, which enable the LED devices to be an alternative to the traditional illu ⁇ minating devices in many situations.
  • the prior art provides many improvements to achieve an omnidirectional illumination effect based on the LED technology.
  • Patent Document EP 2180234 Al discloses an invention which provides an omnidirectional light bulb com ⁇ prising a transparent body member and a contact member at one end of the body member.
  • the light bulb further comprises a disc and a supporting pole disposed therein and is provided with a plurality of LEDs in a circumferential direction of the disc, thus an appropriate illumination effect can be pro ⁇ vided in all directions.
  • Patent Document WO2009/091562A2 dis ⁇ closes an invention which provides a light bulb provided therein with an LED support and provided with a plurality of LEDs at each surface of the LED support so as to achieve mul- tidirectional or omnidirectional illumination.
  • both the inventions need to use a plurality of LED chips as a ba ⁇ sis for achieving multidirectional or omnidirectional illumi- nation, which not only increases production cost but also limits the application environment of the products.
  • the present inven- tion provides a novel lens for an illuminating device.
  • An il ⁇ luminating device based on the lens can achieve multidirec ⁇ tional or omnidirectional illumination and achieve a uniform light distribution in all directions by using a single LED chip instead of a plurality of LED chips in addition to the lens providing light exiting in a forward direction and light reflected by the lens and exiting in a backward direction, thus the production process is simplified, and also the pro ⁇ duction cost is reduced.
  • leakage of light for for ⁇ ward illumination can be prevented by using a design of a re- flective surface in the lens.
  • a first object of the present invention is achieved by a lens for a light source, comprising a bottom surface defining a recessed region at its center and a top surface rising from the bottom surface, wherein a surface of the recessed region comprises an incident surface disposed at its center and a reflective surface disposed around the incident surface, a first incident light from the light source reaches and exits the top surface in a first direction after being refracted by the incident surface to form first emergent light for forward illumination, and a second incident light from the light source is reflected, when emitted to the reflective surface, and then exits in a second direction to form second emergent light for backward illumination.
  • light from the light source after passing through the lens, light from the light source can achieve an illumination effect simultaneously in multiple directions such as two opposite directions to achieve the possibility of illumination in all directions.
  • the first emergent light and the second emergent light jointly achieve omnidirectional illumination.
  • the possibility of illumination in multiple or all directions can be achieved by emergent light in both di- rections.
  • the incident surface is designed to be transpar ⁇ ent or semitransparent so that the first light is transmitted directly through the incident surface and then refracted and exits through the top surface.
  • the first light from the light source can exit from the exit surface directly after transmitted through the incident surface and can form emer ⁇ gent light directly in the forward direction along the opti ⁇ cal axis .
  • a surface of the reflective surface that faces the light source is provided with a reflective coating by which the second light is reflected.
  • the possibility is achieved that the second light from the light source is re ⁇ flected and exits in a direction opposed to the incident di ⁇ rection after being subjected to the action of the reflective coating.
  • the reflective coating is a mirror reflective coating.
  • Such reflective coating appropriately allows the se ⁇ cond light from the light source to be reflected with high efficiency .
  • the incident surface is designed to have any shape selected from a semi ⁇ circle, a rectangle and a trapezoid. Light incident through the incident surface can form light distributions in differ ⁇ ent forms after being incident according to different con- tours.
  • the reflective surface comprises a first portion and a second portion, the second light exits after being re ⁇ flected by at least the second portion.
  • the first portion connects the second portion of the reflective surface to the incident surface when viewed in section of the lens, so that all the light from the light source is subjected to the ac ⁇ tion of the incident surface or the reflective surface and the second light is reflected by the second portion of the reflective surface.
  • the first por ⁇ tion is designed to have a line shape
  • the second portion is designed to form any of a line and a spline curve.
  • the first por ⁇ tion is gradually away from an optical axis of the lens from the bottom surface to the top surface.
  • An effective boundary is formed between the reflective surface and incident sur ⁇ face, the second light is incident on the reflective surface only .
  • the first por- tion and the second portion jointly form a continuous spline curve, when.
  • the second light from the light source can be subjected to the action of both the first portion and the second portion and reflected to exit toward the bottom sur ⁇ face .
  • the first por- tion and the second portion are jointly formed to be gradual ⁇ ly close to an optical axis of the lens from the bottom sur ⁇ face to the top surface.
  • the so formed reflective surface is capable of controlling the emergent angle of the second light after being reflected.
  • the top surface comprises an exit surface and a demoulding surface disposed around the exit surface, the first light exiting through the exit surface after passing through the incident surface.
  • a demoulding surface disposed around the exit surface, the first light exiting through the exit surface after passing through the incident surface.
  • the exit surface is designed to form a spline curve when viewed from section of the lens.
  • uniform circumferential illumination in the forward direction can be formed by the light refracted by the exit surface.
  • the demoulding surface is designed to form any of a spline curve and a line when viewed in section of the lens.
  • Such demoulding surface facilitates the possibility of sim ⁇ plified machining or manufacture of the lens.
  • the lens is designed to be rotationally symmet ⁇ rical around an optical axis.
  • Such lens can form a rotation- ally symmetrical light distribution of the emergent light.
  • the lens is made of any of optical plastic and glass. Such materials allow the lens to have a suitable eco ⁇ nomic property while having an excellent optical performance.
  • Another object of the present invention is achieved by an il- luminating device comprising a light source and a lens de ⁇ scribed above.
  • Such illuminating device can achieve an illu ⁇ mination effect in all directions by the aid of the lens.
  • the illuminating device is designed as an LED retrofit lamp.
  • retrofit lamp can be advantageously com ⁇ patible with platforms of other illuminating devices and pro ⁇ vide a good economical applicability to widen the application environment .
  • the LED retrofit lamp is an A-type retrofit lamp. Therefore, it can be compatible with a shape of a traditional light bulb in appearance and performance and has an excellent omnidrectional illumination performance similar to that of the traditional light bulb.
  • the illuminating device further comprises a heat sink designed as a plurality of heat sink fins disposed in a circumferential direction at a peripheral of the illuminating device, and viewed from section of the illuminating device, the heat sink fin comprises a first edge which is designed to be inclined away from an optical axis of the lens in a direc- tion from the top surface to the bottom surface of the lens, when. According to such design, light passing through the lens is prevented from being blocked or obstructed by the structural design of the heat sink to decrease the illumina ⁇ tion effect.
  • a heat sink designed as a plurality of heat sink fins disposed in a circumferential direction at a peripheral of the illuminating device, and viewed from section of the illuminating device, the heat sink fin comprises a first edge which is designed to be inclined away from an optical axis of the lens in a direc- tion from the top surface to the bottom surface of the lens, when. According to such design, light passing through the lens is prevented
  • Fig. 1 is a sectional schematic view of a lens according to an embodiment of the present invention.
  • Fig. 2 is a optical path diagram of the lens according to an embodiment of the present invention.
  • Fig. 3 is a sectional schematic view of an illuminating de ⁇ vice according to an embodiment of the present invention.
  • Fig. 1 is a sectional schematic view of a lens 100 according to an embodiment of the present invention.
  • the lens 100 can be designed to be rotationally symmet ⁇ rical with respect to an optical axis X and may be made of optical plastic or glass, thus the production cost is re ⁇ pokerd, and also an excellent optical performance of the lens 100 can be ensured.
  • the lens 100 has a top surface 2 and a bottom surface 1 disposed opposite to the top surface 2, an incident surface 41 and a reflective surface 42 of the lens and a recessed region 3 for accommodating a light source 5 are defined between the bottom surface 1 and the top surface 2, the recessed region 3 is designed to be hollow, and as can be seen from the figure, the incident surface includes two parts, i.e., the incident surface 41 and the reflective sur ⁇ face 42.
  • FIG. 2 is a optical path diagram of the lens 100 according to an embodiment of the present invention.
  • An LED light source 5 having advantages such as low energy consumption, high efficiency and long lifetime can be disposed at the center of the bottom surface 1, thus light from the LED light source 5 is incident into the lens 100 and reaches the incident surface after entering the bottom surface 1.
  • First light LI from the light source 5 is incident directly on the incident surface 41, and at this time, the first light LI is refracted on the incident surface 41 to the top surface 2, and further refracted by the top surface 2 and then emit ⁇ ted to the outside of the lens 100.
  • a contour of the incident surface 41 may have different designs, and for example, may be designed into any shape selected from a semicircle, a rec ⁇ tangle and a trapezoid when viewed from section, the contour of the incident surface 41 is, of course, not limited to the above shapes, any similar shape capable of achieving the same or similar function can be used to be designed as the contour of the incident surface 41, and therefore the first light LI incident from the incident surface 41 can have different light distributions, thereby forming light distributions of emergent light LI' with different effects after finally exit ⁇ ing through the top surface 2.
  • the top surface 2 includes two parts which are respectively an exit surface 21 and a demoulding surface 22, after being re- fracted by the incident surface 41, the first light LI from the light source 5 is refracted only by the exit surface 21 and then exits (the details will be described hereinafter) , thus no light from the light source 5 is emitted through the demoulding surface 22, the demoulding surface 22 is connected to the exit surface 21 of the top surface 2 and the bottom surface 1 so that the whole lens 100 has a continuous periph ⁇ eral contour, and such design provides a contour design which is easy to machine or manufacture during the manufacture of the lens 100, and facilitates, for example, the process of demoulding.
  • the reflective surface 42 as the other incident surface is disposed around the incident surface 41 and is rotationally symmetrical with respect to the optical axis X of the lens 100 around the incident surface 41.
  • the reflective surface 42 may be disposed to have two portions, i.e., a first por ⁇ tion 421 and a second portion 421, wherein the first portion 421 can be disposed in a line shape when viewed from section, and the second portion 422 can be also disposed in a line shape, thus the first and second portions 421, 422 form a zigzag sectional contour as a whole.
  • the first portion 421 can achieve the function of defining a boundary between the first light LI and second light L2 from the same light source 5, and the first light LI incident through the incident surface 41 is not incident onto the reflective sur ⁇ face 42, thus the first light LI passes only through the in ⁇ cident surface 41 to form final forward emergent light LI' .
  • the second light L2 from the light source 5 is incident onto the reflective surface 41, since the re ⁇ flective surface 42 is treated with, for example, a mirror reflective coating, the second light L2 is totally reflected directly by the reflective surface 42, then emitted towards a direction of the bottom surface 1, and finally exits through the bottom surface 1 to form emergent light L2' .
  • one part LI of light from the light source 5 forms, through the incident surface 41, a light distribution in a first direction which is the forward direction, and the other part L2 of the light from the light source 5 forms, af ⁇ ter being reflected by the reflective surface 42, a backward light distribution, i.e., another light distribution after exiting in a second direction opposite to the first direc ⁇ tion, and an omnidirectional illumination effect is finally provided based on the light distributions in different re ⁇ gions .
  • a light flux ratio of the first emergent light LI' exiting in the first direction to the se- cond emergent light L2' exiting in the second direction can be changed by changing a ratio between volumes of the inci ⁇ dent surface 41 and the reflective surface 42 or between siz ⁇ es of surface contours of the incident surface 41 and the re- flective surface 42 depending on the volumes or the sizes of the surface contours of the incident surface 41 and the re ⁇ flective surface 42 when viewed from section of the lens 100.
  • the two portions 421, 422 of the reflective surface 42 of the lens 100 can be designed into a line shape and a spline curve, respectively, thus different reflection effects or re ⁇ flection effects with different exit angles can be finally provided for the second light L2, and thereby the adjustment of, for example, the light distribution and exit angle of the emergent light L2' from the light source 5 can be achieved so that an illumination range of the omnidirectional illumina ⁇ tion processed by the lens 100 can be finally adjusted.
  • the two portions 421, 422 of the reflective surface 42 of the lens 100 can be designed in- tegrally, that is, the two portions 421, 422 are designed to form, for example, a spline curve when viewed from section of the lens 100, thus the manufacture process of the lens 100 can be simplified to a certain extent, and an excellent omni ⁇ directional illumination effect can be achieved.
  • an illuminating device 200 is provided based on the lens 100 described above, referring to Fig. 3 which il ⁇ lustrates a sectional schematic view of the illuminating de ⁇ vice 200 according to an embodiment of the present invention.
  • the lens 100 can be disposed at a top of the illuminating device 200 to receive light from an LED light source to provide illumination in a forward direc- tion which is a direction from the bottom surface to the top surface of the lens 100 while providing illumination in a backward direction which is a direction from the top surface to the bottom surface of the lens 100, thereby forming a light distribution of omnidirectional illumination of the il ⁇ luminating device 200.
  • the heat sink 6 in the illuminating device 200 is de- signed with heat sink fins 61, and the heat sink fin 61 is designed to have a first edge 611 which is inclined gradually close to the optical axis X in a direction from the bottom to the top of the illuminating device 200, thus it is avoided that downward light from the lens 100 is blocked or obstruct- ed by the heat sink fin 61 and as a result the whole omnidi ⁇ rectional illumination effect is lowered or deteriorated if the first edge 611 is designed to be horizontal.

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

Abstract

La présente invention se rapporte à une lentille qui est destinée à une source de lumière et qui comporte une surface inférieure ayant une région évidée en son centre, ainsi qu'une surface supérieure plus élevée partant de la surface inférieure. Une surface de la région évidée inclut une surface incidente qui se situe au centre, et une surface réfléchissante qui se trouve autour de la surface incidente. Une première lumière incidente en provenance de la source de lumière atteint la surface supérieure et en sort dans une première direction après avoir été réfractée par la surface incidente afin de former une première lumière émergente pour un éclairage avant. Une seconde lumière incidente en provenance de la source de lumière est réfléchie, lorsqu'elle est émise vers la surface réfléchissante, puis elle sort dans une seconde direction afin de former une seconde lumière émergente pour un éclairage arrière. La présente invention a trait en outre à un dispositif d'éclairage utilisant ladite lentille.
PCT/EP2014/064751 2013-07-17 2014-07-09 Lentille destinée à un dispositif d'éclairage, et dispositif d'éclairage comprenant cette lentille WO2015007597A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310302950.5 2013-07-17
CN201310302950.5A CN104296068A (zh) 2013-07-17 2013-07-17 用于照明装置的透镜和具有该透镜的照明装置

Publications (1)

Publication Number Publication Date
WO2015007597A1 true WO2015007597A1 (fr) 2015-01-22

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PCT/EP2014/064751 WO2015007597A1 (fr) 2013-07-17 2014-07-09 Lentille destinée à un dispositif d'éclairage, et dispositif d'éclairage comprenant cette lentille

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Country Link
CN (1) CN104296068A (fr)
WO (1) WO2015007597A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110553227A (zh) * 2019-09-29 2019-12-10 苏州欧普照明有限公司 灯具及其光源模组
US11251347B2 (en) 2017-06-01 2022-02-15 Osram Oled Gmbh Semiconductor light source

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Publication number Priority date Publication date Assignee Title
FR3045781B1 (fr) * 2015-12-18 2020-03-06 Valeo Vision Belgique Module lumineux, notamment pour feu stop sureleve avec aspect lisse
CN107559617A (zh) * 2017-10-20 2018-01-09 中节能晶和照明有限公司 一种上下出光led面板灯
CN116772159A (zh) * 2023-08-22 2023-09-19 深圳市帝狼光电有限公司 一种双面台灯

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US6218785B1 (en) * 1999-03-19 2001-04-17 Incerti & Simonini Di Incerti Edda & C. S.N.C. Low-tension lighting device
US20070268722A1 (en) * 2005-12-19 2007-11-22 Enplas Corporation Emission device
US20110007513A1 (en) * 2009-07-10 2011-01-13 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led module
US20110140149A1 (en) * 2010-07-15 2011-06-16 Pinecone Energies, Inc. Optical device for semiconductor based lamp
US20110140148A1 (en) * 2010-07-15 2011-06-16 Pinecone Energies, Inc. Optical device for semiconductor based lamp

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Publication number Priority date Publication date Assignee Title
US6218785B1 (en) * 1999-03-19 2001-04-17 Incerti & Simonini Di Incerti Edda & C. S.N.C. Low-tension lighting device
US20070268722A1 (en) * 2005-12-19 2007-11-22 Enplas Corporation Emission device
US20110007513A1 (en) * 2009-07-10 2011-01-13 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led module
US20110140149A1 (en) * 2010-07-15 2011-06-16 Pinecone Energies, Inc. Optical device for semiconductor based lamp
US20110140148A1 (en) * 2010-07-15 2011-06-16 Pinecone Energies, Inc. Optical device for semiconductor based lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11251347B2 (en) 2017-06-01 2022-02-15 Osram Oled Gmbh Semiconductor light source
CN110553227A (zh) * 2019-09-29 2019-12-10 苏州欧普照明有限公司 灯具及其光源模组
CN110553227B (zh) * 2019-09-29 2024-04-30 苏州欧普照明有限公司 灯具及其光源模组

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