EP4215807A1 - Système de source lumineuse de lampe d'éclairage, et lampe d'éclairage - Google Patents

Système de source lumineuse de lampe d'éclairage, et lampe d'éclairage Download PDF

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Publication number
EP4215807A1
EP4215807A1 EP21868698.8A EP21868698A EP4215807A1 EP 4215807 A1 EP4215807 A1 EP 4215807A1 EP 21868698 A EP21868698 A EP 21868698A EP 4215807 A1 EP4215807 A1 EP 4215807A1
Authority
EP
European Patent Office
Prior art keywords
reflector
luminous body
source system
light source
light
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.)
Pending
Application number
EP21868698.8A
Other languages
German (de)
English (en)
Other versions
EP4215807A4 (fr
Inventor
Junhui Huang
Chaobo LIU
Chenxi BU
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.)
Opple Lighting Co Ltd
Suzhou Op Lighting Co Ltd
Original Assignee
Opple Lighting Co Ltd
Suzhou Op Lighting 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
Priority claimed from CN202010998489.1A external-priority patent/CN111998239A/zh
Priority claimed from CN202022082904.7U external-priority patent/CN212408322U/zh
Application filed by Opple Lighting Co Ltd, Suzhou Op Lighting Co Ltd filed Critical Opple Lighting Co Ltd
Publication of EP4215807A1 publication Critical patent/EP4215807A1/fr
Publication of EP4215807A4 publication Critical patent/EP4215807A4/fr
Pending legal-status Critical Current

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F21V7/0041—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following for avoiding direct view of the light source or to prevent dazzling
    • 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
    • F21V7/0025—Combination of two or more reflectors for a single light 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • 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 application relates to the field of lighting technology, in particular to a light source system of a lighting lamp and the lighting lamp.
  • Lighting lamps are widely used in home lighting, commercial lighting, industrial lighting, road lighting, landscape lighting, special lighting and other fields. After a long period of development, users have higher and higher requirements for the performance of the lighting lamps, which brings greater challenges to the structural design of the lighting lamps.
  • the lighting lamp with traditional optical solution may have glare problem if the light emitted by a luminous body directly enters users' eyes, which leads to users' uncomfortable experience. Therefore, the existing lighting lamps have the problem of poor user experience.
  • the present application provides a light source system of a lighting lamp and the lighting lamp, which can solve the problem of poor user experience of the lighting lamp.
  • the present application adopts the following technical solution.
  • the light source system of the lighting lamp comprises a first reflector and a second reflector, the first reflector is nested in the second reflector, a first end of the first reflector is provided with a first light outlet, the first light outlet is located in the second reflector, a third end of the second reflector is provided with a second light outlet.
  • the light source system further comprises a first luminous body, the first luminous body is provided in the first reflector, the first reflector comprises a first reflection surface facing toward the first luminous body, and in an optical axis direction of the first luminous body, an orthographic projection of the first reflection surface covers an orthographic projection of the first luminous body; and/or, the light source system further comprises a second luminous body, the second luminous body is provided in the second reflector, the second reflector comprises a second reflection surface facing toward the second luminous body, and in an optical axis direction of the second luminous body, an orthographic projection of the second reflection surface covers an orthographic projection of the second luminous body.
  • Light emitted by the first luminous body and the second luminous body is reflected by at least one of the first reflector and the second reflector and then exits from the second light outlet.
  • the lighting lamp comprises the above light source system.
  • the light source system of the lighting lamp includes the first reflector and the second reflector.
  • the first luminous body shielded by the first reflection surface
  • the second luminous body is shielded by the second reflection surface.
  • the light source system of the lighting lamp hides the first luminous body and the second luminous body under the condition that the light normally exits, so that it is difficult for users to see the first luminous body and the second luminous body, and thus the purpose of well preventing the glare is achieved so as to improve user experience when the user uses the lighting lamp.
  • Embodiments of the present application provide a light source system of a lighting lamp, the light source system includes a first reflector 200 and a second reflector 300.
  • the first reflector 200 and the second reflector 300 are both reflection devices of the light source system, and each of the first reflector 200 and the second reflector 300 reflects light.
  • the first reflector 200 is nested in the second reflector 300.
  • the first reflector 200 includes a first end 230 and a second end 240.
  • the first end 230 is provided with a first light outlet 231, and the first light outlet 231 is located in the second reflector 300.
  • the second reflector 300 includes a third end 340 and a fourth end 350, and the third end 340 is provided with a second light outlet 341.
  • the light source system further includes a first luminous body 110, the first luminous body 110 is provided in the first reflector 200, and the first reflector 200 has a first reflection surface 210 facing toward the first luminous body 110.
  • an orthographic projection of the first reflection surface 210 covers an orthographic projection of the first luminous body 110, so that the first reflection surface 210 covers the first luminous body 110, and thus the user cannot see the first luminous body 110 in the case that the user is just opposite to the first light outlet 231.
  • light emitted by the first luminous body 110 is reflected by at least one of the first reflector 200 and the second reflector 300 and then exits from the second light outlet 341, thereby achieving the purpose of illumination.
  • the light source system further includes a second luminous body 120, the second luminous body 120 is provided in the second reflector 300, and the second reflector 300 has a second reflection surface 310 facing toward the second luminous body 120.
  • an orthographic projection of the second reflection surface 310 covers an orthographic projection of the second luminous body 120, so that the second reflection surface 310 covers the second luminous body 120, and thus the user cannot see the second luminous body 120 in the case that the user is just opposite to the second light outlet 341.
  • light emitted by the second luminous body 120 is reflected by at least one of the first reflector 200 and the second reflector 300 and then exits from the second light outlet 341, thereby achieving the purpose of illumination.
  • the light source system for example includes at least one of the first luminous body 110 and the second luminous body 120.
  • the lighting lamp undoubtedly has stronger illumination brightness and better illumination effect.
  • the first reflector 200 and the second reflector 300 no part of the light emitted by the first luminous body 110 and the second luminous body 120 directly exits without being reflected by the first reflector 200 or the second reflector 300.
  • the first luminous body 110 and the second luminous body 120 are light emitting devices of the light source system, and the first luminous body 110 and the second luminous body 120 for example are LED luminous bodies, which have the advantages of high brightness, low heat generation amount, low energy consumption and long service life.
  • the light source system of the lighting lamp includes the first reflector 200 and the second reflector 300.
  • the first luminous body 110 is provided in the first reflector 200, and in the optical axis direction of the first luminous body 110, the orthographic projection of the first reflection surface 210 covers the orthographic projection of the first luminous body 110, so that the first luminous body 110 is shielded by the first reflection surface 210.
  • the light source system includes the second luminous body 120
  • the second luminous body 120 is provided in the second reflector 300, and in the optical axis direction of the second luminous body 120, the orthographic projection of the second reflection surface 310 covers the orthographic projection of the second luminous body 120, so that the second luminous body 120 is shielded by the second reflection surface 310.
  • the light source system of the lighting lamp according to the embodiments of the present application hides the first luminous body 110 and the second luminous body 120 under the condition that the light normally exits, so that it is difficult for users to see the first luminous body 110 and the second luminous body 120, and the purpose of well preventing the glare is achieved.
  • the first reflector 200 has various structures.
  • an area of a cross section of the first reflector 200 gradually decreases in a first direction.
  • the first direction refers to a direction extending from the first light outlet 231 to the second light outlet 341, and the cross section of the first reflector 200 is perpendicular to the first direction.
  • an outline size of the first reflector 200 gradually decreases, so that the first luminous body 110 is well shielded by the first reflector 200 on the basis of ensuring the reflection effect of the first reflector 200, and thus the purpose of hiding the first luminous body 110 is achieved.
  • the first reflector 200 may has other structures, as long as it is ensured that the light projected onto the first reflector 200 is reflected to the second light outlet 341 and then exits from the second light outlet 341 or is reflected to the second reflector 300 and then reflected to the second light outlet 341 by the second reflector 300.
  • the specific shape of the first reflector 200 is not limited in the embodiments of the present application.
  • the second reflector 300 has various structures.
  • the second reflector 300 includes a first reflection portion 320 and a second reflection portion 330 connected with the first reflection portion 320.
  • the first reflection portion 320 and the second reflection portion 330 are sequentially provided along the first direction, an area of a cross section of the first reflection portion 320 gradually decreases in the first direction, and an area of a cross section of the second reflection portion 330 gradually increases in the first direction.
  • the second light outlet 341 is provided at an end of the second reflection portion 330 facing away from the first reflection portion 320.
  • This structure easily provides a shielding structure at a connection position of the first reflection portion 320 and the second reflection portion 330, so as to shield the first luminous body 110.
  • the second reflector 300 includes the first reflection portion 320 and the second reflection portion 330 connected with the first reflection portion 320.
  • the first reflection portion 320 is at least partially nested in the second reflection portion 330, the area of the cross section of the first reflection portion 320 gradually decreases in the first direction, and the area of the cross section of the second reflection portion 330 gradually increases in the first direction. Because the area of the cross section of the first reflection portion 320 gradually decreases, a shielding structure is easily provided so as to shield the second luminous body 120. Meanwhile, at least part of the first reflection portion 320 is nested in the second reflection portion 330, so that a length of the second reflector 300 in the first direction becomes smaller, which is beneficial to the miniaturization of the light source system.
  • the first luminous body 110 is provided in the second end 240 of the first reflector 200, which facilitates an arrangement of the first luminous body 110. Meanwhile, a distance between the second end 240 of the first reflector 200 and the first light outlet 231 is greater, then it is more convenient to hide the first luminous body 110.
  • the first luminous body 110 is provided to be adjacent to an edge of the first reflector 200, in this case, an end of the first reflection portion 320 connected with the second reflection portion 330 is closer to the optical axis of the first luminous body 110 than the first luminous body 110, so that more parts of the first reflection portion 320 are adopted to shield the first luminous body 110, which is more beneficial to shield the first luminous body 110 by the first reflection surface 210.
  • the second luminous body 120 is provided in an end of the first reflection portion 320 facing away from the second reflection portion 330, that is to say, the second luminous body 120 is provided in the end of the first reflection portion 320 facing away from the second light outlet 341.
  • This structure allows the second luminous body 120 to be closer to the fourth end 350 of the second reflector 300, which facilitates an arrangement of the second luminous body 120. Meanwhile, a distance between the fourth end of the second reflector 300 and the second light outlet 341 is greater, then it is more convenient to shield the second luminous body 120.
  • the second luminous body 120 is provided to be adjacent to an edge of the first reflection portion 320, so that the end of the first reflection portion 320 connected with the second reflection portion 330 is closer to the optical axis of the second luminous body 120 than the second luminous body 120, in this case, more parts of the first reflection portion 320 are adopted to shield the second luminous body 120, which is more beneficial to shield the second luminous body 120 by the second reflection surface 310.
  • the first reflection portion 320 and the second reflection portion 330 are of an integral structure or are fixedly connected with each other by assembling, and the embodiments of the present application do not limit the specific connecting method of the first reflection portion 320 and the second reflection portion 330.
  • the first reflector 200 is nested in the second reflector 300.
  • the first reflector 200 is provided in the first reflection portion 320. This structure ensures that the first reflector 200 is nested in the second reflector 300, and meanwhile, it prevents the first reflector 200 from extending into the second reflection portion 330 so as to avoid adverse effects on the light reflected by the second reflection portion 330.
  • the second end 240 of the first reflector 200 is flush with the end of the first reflection portion 320 facing away from the second light outlet 341.
  • This structure allows that it is easier to install the first reflector 200 and the second reflector 300 on a same installing base (for example, a circuit board 500 described later), and thus the assembly operation of the light source system is simplified.
  • an area of a cross section of an end, adjacent to the second light outlet 341, of the first reflection portion 320 is a first area
  • an area of a cross section of the other end of the first reflection portion 320 is a second area
  • a ratio between the first area and the second area is in a range of 0.6-0.9.
  • an included angle ⁇ between the first direction and a connection line between the first light outlet 231 and the second light outlet 341 is less than or equal to 45 degrees in the above-described cross section parallel to the first direction.
  • an outer circumferential surface of the first reflector 200 is provided with a third reflection surface 220, the third reflection surface 220 is a curved surface, and the third reflection surface 220 is bent toward a side where the second end 240 of the first reflector 200 is located.
  • the third reflection surface 220 reflects the light emitted by the second luminous body 120, so that more light emitted by the second luminous body 120 exits from the light source system, thereby increasing the light output of the light source system.
  • the third reflection surface 220 is the curved surface
  • an area of the third reflection surface 220 is increased, and more light reaches the third reflection surface 220, and then is reflected by the third reflection surface 220.
  • the third reflection surface 220 reflects more light to the second reflector 300, so that the light uniformity effect of the whole light source system is better.
  • a total number of each of the first luminous body 110 and the second luminous body 120 is one or at least two.
  • the total number of the first luminous bodies 110 is at least two, respective first luminous bodies 110 are provided along a circumferential direction of the first reflector 200, and thus an annular luminous structure is formed, so that a uniform luminous effect is achieved in multiple directions.
  • the total number of the second luminous bodies 120 is at least two, and respective two second luminous bodies 120 are provided along a circumferential direction of the second reflector 300, and thus an annular light emitting structure is formed, so that a uniform luminous effect is achieved in multiple directions.
  • the light source system further includes at least one light distribution piece 400, the light distribution piece 400 covers the first luminous body 110 or the second luminous body 120, and the light distribution piece 400 distributes the light emitted by the first luminous body 110 or the second luminous body 120.
  • the light distribution piece 400 is a light-uniformizing device or a light-converging device, and the embodiments of the present application do not limit the specific type of the light distribution piece 400.
  • a total number of the light distribution piece 400 is one, or the total number of the light distribution pieces 400 is at least two.
  • the light distribution piece 400 for example covers only a part of the first luminous bodies 110 or a part of the second luminous bodies 120; however, in order to avoid mutual interference, the total number of the light distribution pieces 400 is equal to the total numbers of the first luminous body 110 and the second luminous body 120, and each of the first luminous body 110 and the second luminous body 120 is covered by one light distribution piece 400. That is to say, each first luminous body 110 is individually provided with one light distribution piece 400 for light distribution, and each second luminous body 120 is individually provided with one light distribution piece 400 for light distribution.
  • the light distribution piece 400 covers the first luminous body 110 or the second luminous body 120, so that the optical interference between the first luminous bodies 110 or between the second luminous bodies 120 is alleviated or avoided, and the light distribution effect of each first luminous body 110 or each second luminous body 120 is improved, so that the light efficiency of the whole light source system is more excellent.
  • a plurality of light distribution pieces 400 are of an integral structure. In an assembling process, the plurality of light distribution pieces 400 are installed as a whole without individual installation, thereby facilitating assembling and improving assembling efficiency.
  • the light distribution piece 400 is an annular piece, and one light distribution piece 400 covers a plurality of first luminous bodies 110 provided along a same circumferential direction, or one light distribution piece 400 covers a plurality of second luminous bodies 120 provided along a same circumferential direction. This embodiment reduces the total number of the light distribution pieces 400, thereby facilitating the rapid assembling of the light source system.
  • the light distribution piece 400 is a lens, more specifically, a convex lens, a concave lens or a lens group, and the lens has a good light distribution effect and a relatively simple structure.
  • the light distribution piece 400 is a plano-convex lens or a cover lens with an accommodating space, and specifically, the first luminous body 110 or the second luminous body 120 is located in the accommodating space.
  • the light distribution piece 400 not only plays a role of light distribution, but also plays a role of protecting the first luminous body 110 or the second luminous body 120.
  • the fourth end 350 of the second reflector 300 is an open end. Specifically, in the light source system according to the embodiments of the present application, an opening of the fourth end 350 of the second reflector 300 is blocked off by a circuit board 500, the first luminous body 110 and the second luminous body 120 are fixed on the circuit board 500, and the circuit board 500 provides a installing base for the first luminous body 110 and the second luminous body 120. Specifically, the first luminous body 110 and the second luminous body 120 are electrically connected with the circuit board 500, and the circuit board 500 supplies a power to the first luminous body 110 and the second luminous body 120.
  • the circuit board 500 is fixedly connected with the second reflector 300, and in the assembling process of the lighting lamp, the second reflector 300 is installed by using the circuit board 500 as the installing base. Meanwhile, the circuit board 500 further blocks off the opening of the fourth end 350 of the second reflector 300, thereby preventing the light emitted by the first luminous body 110 and the second luminous body 120 from leaking out of the opening of the fourth end 350 of the second reflector 300.
  • a side of the circuit board 500 facing away from the first luminous body 110 or the second luminous body 120 is provided with a heat dissipation seat, and the heat dissipation seat plays a role of heat dissipation.
  • the heat dissipation seat for example is made of a material that is capable of efficiently dissipating heat, such as a stainless steel heat dissipation seat or an aluminum heat dissipation seat.
  • the heat dissipation seat is designed to have a structure that is easy to dissipate heat.
  • the heat dissipation seat includes a plurality of heat dissipation pins or heat dissipation fins distributed in an array.
  • the heat dissipation seat for example is directly bonded and fixed with the circuit board 500 through a heat-conducting adhesive layer.
  • the heat generated by the circuit board 500 and the first luminous body 110 or the second luminous body 120 provided on the circuit board 500 in the operation process is quickly transmitted to the heat dissipation seat through the heat-conducting adhesive layer, and then transmitted to the whole lighting lamp through the heat dissipation seat, so as to achieve the purpose of rapid heat dissipation.
  • the embodiments of the present application further provide a lighting lamp, and the lighting lamp includes the light source system described in the above embodiments.
  • the lighting lamp according to the embodiments of the present application for example is a downlight, a spotlight and the like, and the embodiments of the present application do not limit the specific type of the lighting lamp.
  • the lighting lamp according to the embodiments of the present application further includes a circuit board 500 and a housing 600, the first luminous body 110 and the second luminous body 120 are provided on the circuit board 500, and the circuit board 500 is provided on a bottom wall 630 of the housing 600, thereby improving the installation stability of the circuit board 500.
  • the first reflector 200 is located between a sidewall 640 of the housing 600 and the first luminous body 110. Or, the first reflector 200 is located between the second reflector 300 and the first luminous body 110.
  • the second reflector 300 is more convenient to be installed, that is to say, the second reflector 300 is fixedly connected with the circuit board 500.
  • the second luminous body 120 is located between the sidewall 640 of the housing 600 and the first reflector 200. Or, the second luminous body 120 is located between the second reflector 300 and the first reflector 200.
  • the second reflector 300 surrounds the second luminous body 120, so that the second reflector 300 reflects the light better.
  • the lighting lamp further includes a mask 700.
  • the housing 600 has a chamber 610 and an opening 620.
  • the mask 700 is installed at the opening 620, and the mask 700 and the housing 600 enclose an optical chamber.
  • the light source system is provided in the light source chamber, that is to say, both the first reflector 200 and the second reflector 300 are provided in the optical chamber, and an orientation of the first light outlet 231 is consistent with an orientation of the opening 620.
  • the light emitted by the first luminous body 110 and the second luminous body 120 is reflected by the first reflector 200 and the second reflector 300, and then exits from the mask 700, and the mask 700 further improves the light uniformity effect of the lighting lamp.
  • the second reflector 300 is fixed between the mask 700 and the bottom wall 630 of the housing 600; or, the second reflector 300 is fixed between the mask 700 and the circuit board 500. Both of these designs well ensure that the light after being reflected passes through the mask 700 and then exits, so that the illumination effect of the lighting lamp is improved.
  • the lighting lamp further includes a driver 800 in addition to the circuit board 500, and the driver 800 is provided on the circuit board 500.
  • the driver 800 is provided on a side of the circuit board 500 facing the first light outlet 231 or is provided on a side of the circuit board 500 facing away from the first light outlet 231, which is not limited by the embodiments of the present application.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP21868698.8A 2020-09-21 2021-09-17 Système de source lumineuse de lampe d'éclairage, et lampe d'éclairage Pending EP4215807A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202010998489.1A CN111998239A (zh) 2020-09-21 2020-09-21 照明灯具的光源系统及照明灯具
CN202022082904.7U CN212408322U (zh) 2020-09-21 2020-09-21 照明灯具的光源系统及照明灯具
PCT/CN2021/118961 WO2022057876A1 (fr) 2020-09-21 2021-09-17 Système de source lumineuse de lampe d'éclairage, et lampe d'éclairage

Publications (2)

Publication Number Publication Date
EP4215807A1 true EP4215807A1 (fr) 2023-07-26
EP4215807A4 EP4215807A4 (fr) 2024-05-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21868698.8A Pending EP4215807A4 (fr) 2020-09-21 2021-09-17 Système de source lumineuse de lampe d'éclairage, et lampe d'éclairage

Country Status (2)

Country Link
EP (1) EP4215807A4 (fr)
WO (1) WO2022057876A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100891305B1 (ko) * 2007-04-04 2009-04-06 엘지전자 주식회사 조명장치
CN101608768A (zh) * 2008-06-18 2009-12-23 富准精密工业(深圳)有限公司 发光二极管灯具
EP2726780B1 (fr) * 2011-07-01 2016-06-01 Koninklijke Philips N.V. Guide de lumière
US9279564B1 (en) * 2011-08-11 2016-03-08 Universal Lighting Technologies, Inc. Indirect area lighting apparatus and methods
CN103557495A (zh) * 2013-11-20 2014-02-05 郝乐(上海)电子有限公司 一种提高光效的防眩光灯具的制作工艺
CN111998239A (zh) * 2020-09-21 2020-11-27 苏州欧普照明有限公司 照明灯具的光源系统及照明灯具

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EP4215807A4 (fr) 2024-05-01
WO2022057876A1 (fr) 2022-03-24

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