CN111237711A - Light source system and lighting device - Google Patents
Light source system and lighting device Download PDFInfo
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- CN111237711A CN111237711A CN201910585130.9A CN201910585130A CN111237711A CN 111237711 A CN111237711 A CN 111237711A CN 201910585130 A CN201910585130 A CN 201910585130A CN 111237711 A CN111237711 A CN 111237711A
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- light
- unit
- source system
- light emitting
- emitting unit
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- 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]
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- 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
- F21S41/16—Laser light sources
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- 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
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
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- 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
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a light source system and a lighting device, wherein the light source system comprises: a light emitting unit; the light circulating unit comprises a light reflecting surface and a light emergent surface, the emitted light is reflected and conducted in the light circulating unit through the light reflecting surface and emitted from the light emergent surface, and the light reflecting surface also reflects the light from the light emergent surface back to the light emergent surface; a light distribution control unit including at least two transmission regions having different light transmittances, the light reflected and transmitted by the light reflection surface being emitted with an uneven light distribution through the light distribution control unit; and an imaging unit that images the non-uniform light to form illumination light. Through the mode, different illumination distributions of the single light source are realized.
Description
Technical Field
The present invention relates to the field of lighting technologies, and in particular, to a light source system and a lighting device.
Background
In lighting applications, such as automotive lamp applications, there are often specific requirements for the illuminance distribution, such as high center brightness, low edge brightness, etc. Although some degree of light distribution adjustment can be achieved by using defocusing, defocusing and the like, the adjustment range is limited. With the development of the car light technology, the imaging technology can provide an information interaction function while the car light realizes an illumination function, and becomes an important development direction of future car lights and other lighting applications, so that a higher requirement is provided for the ability of the car light to realize lighting distribution.
In the application of car lights, in order to realize the area brightening or dimming of the illumination brightness, a high-brightness laser light source is generally adopted in the center, and a low-brightness light source is adopted at the edge; or, a plurality of optical systems are adopted to respectively realize different illumination distributions, and are superposed or integrated to meet the final brightness distribution requirement. The above methods are all realized by adopting a plurality of light sources and matched optical systems, and different power supply management needs to be provided according to different light source powers, so that the cost is high and the structure is complex.
Disclosure of Invention
The invention mainly solves the technical problem of providing a light source system and a lighting device with simple structure and low cost so as to realize different illumination distributions of a single light source.
In order to solve the technical problems, the invention adopts a technical scheme that:
there is provided a light source system comprising: a light emitting unit emitting light; the light emitted by the light emitting unit is reflected and conducted in the light circulating unit through the light reflecting surface and emitted from the light emitting surface, and at least part of light from the light emitting surface is reflected back to the light emitting surface by the light reflecting surface; the light distribution control unit is positioned on the light emitting surface of the light circulation unit, comprises at least two transmission areas with different light transmittances, and emits the light reflected and conducted by the light reflecting surface in uneven light distribution after passing through the light distribution control unit; and an imaging unit that images the uneven light to form illumination light.
There is provided a lighting device comprising the above light source system.
The invention has the beneficial effects that: different from the prior art, the light distribution control unit in the light source system of the present invention includes at least two transmission regions with different light transmittances, the light emitted by the light emitting unit is transmitted and conducted in the light circulating unit via the light reflection surface and emitted from the light emitting surface, the light reflection surface reflects at least part of the light from the light emitting surface back to the light emitting surface, the light is emitted in an uneven light distribution after passing through the at least two transmission regions with different transmittances on the light distribution control unit, and the uneven light is imaged by the imaging unit to form illumination light, so that a simple optical structure design is used to replace a complicated light source and power supply system design, and different illumination distributions of a single light source are realized.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a light source system according to the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a light source system according to the present invention;
FIG. 3 is a schematic structural diagram of a light source system according to a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a light source system according to a fourth embodiment of the present invention;
FIG. 5 is a schematic view of the construction of the lighting device of the present invention;
FIG. 6a is a schematic diagram of the structure of the light emitting surface of the light recycling unit of the present invention;
FIG. 6b is a schematic diagram showing the distribution of regions with different light transmittances on the light emitting surface of the light recycling unit of the present invention;
FIG. 7 is a schematic view showing the simulation of luminous flux on the light emitting surface of the light source system according to the present invention;
FIG. 8 is a schematic diagram of an illumination simulation on the light exit surface of the light source system according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of a light source system according to a first embodiment of the invention. The light source system 100 includes: a light emitting unit 10, a light circulating unit 20, a light distribution control unit 30, and an imaging unit 40. The light emitting unit 10 is for emitting light; the light recycling unit 20 comprises a light reflecting surface 23 and a light exit surface 22, light emitted by the light emitting unit 10 is reflected and conducted in the light recycling unit 20 through the light reflecting surface 23 and emitted from the light exit surface 22, and the light reflecting surface 23 reflects at least part of the light from the light exit surface 22 back to the light exit surface 22. Wherein the light reflection surface 23 is arranged around the light exit surface 22. The light distribution control unit 30 is disposed on the light emitting surface 22 of the light recycling unit 20, includes at least two transmission regions with different light transmittances, and emits the light reflected and transmitted by the light reflecting surface 23 through the light distribution control unit 30 with an uneven light distribution. The imaging unit 40 images the uneven light to form illumination light.
In the present embodiment, the light distribution control unit 30 includes two transmission regions having different light transmittances, a center region 31 and an edge region 32 surrounding the center region 31, and the light transmittance of the center region 31 is greater than that of the edge region 32. In other embodiments, the light distribution control unit 30 may include a plurality of transmission regions with different light transmittances, and the light transmittance of each transmission region may be set according to requirements.
The light reflecting surface 23 is provided with a high-reflectivity coating to increase reflection and reduce light loss. The light reflecting surface 23 may also be made of a high reflectivity material. The light reflection surface 23 reflects at least part of the light from the light exit surface 22 back to the light exit surface 22 while allowing the light entering the light circulation unit 20 to be reflected and conducted by the light reflection surface 23, thereby improving the light utilization efficiency. The high-reflectivity coating film is specifically a coating film with a reflectivity of more than 90%, and can be a metal coating film, such as a silver reflecting film and an aluminum reflecting film, or a dielectric layer coating film, such as a composite coating film of a plurality of film layers with different refractive indexes.
The light recycling unit 20 is a solid optical waveguide or a hollow optical device. The light recycling unit 20 is a solid conical rod in this embodiment.
In this embodiment, the light distribution control unit 30 is a selective light transmission film, is located on the light emitting surface 22 of the light recycling unit 20, and is integrated with the light recycling unit 20. In other embodiments, the light distribution control unit 30 may also be disposed on the light emitting surface 22 of the light recycling unit 20 in other independent forms, and is not limited herein.
In this embodiment, the light emitting unit 10 is a laser light emitting unit that emits laser light. The light emitting unit 10 is located outside the light circulating unit 20, and a wavelength selective transmission region 24 is arranged at a position of the light circulating unit 20 close to the light emitting unit 10 and corresponds to the position of the light emitting unit 10; and a wavelength conversion means 25 is provided on the light reflection surface 23 in the light circulation means 20, and the wavelength conversion means 25 converts the laser light into fluorescence and emits the fluorescence.
As shown in fig. 1, the light emitting unit 10 includes two lasers (a first laser 11 and a second laser 12), i.e., a laser light emitting unit. The first laser 11 emits the first laser light 111, the second laser 12 emits the second laser light 121, and the wavelength-selective transmission region 24 includes a first region 241 and a second region 242. The first laser beam 111 enters the light circulation unit 20 through the first region 241 (the first region 241 transmits the first laser beam 111 and reflects other light), and the second laser beam 121 enters the light circulation unit 20 through the second region 242 (the second region 242 transmits the second laser beam 121 and reflects other light). The first laser light 111 and the second laser light 121 are reflected and conducted by the light reflection surface 23 and then reflected to the wavelength conversion unit 25, the wavelength conversion unit 25 converts the first laser light 111 into first fluorescent light 112, and the edge region 32 (low transmittance region) of the light distribution control unit 30 where the first fluorescent light 112 is incident on the light exit surface 22 forms less first fluorescent transmitted light beams 1121 and more first fluorescent reflected light beams 1122; the wavelength converting unit 25 converts the second laser light 121 into the second fluorescent light 122, which forms more second fluorescent transmitted light 1221 and less second fluorescent reflected light 1222 through the middle region 31 (high light transmittance region) of the light distribution control unit 30 on the light exit surface 22. The first fluorescence reflection light beam 1122 and the second fluorescence reflection light beam 1222 are reflected and circulated again by the light reflection surface 23 in the light circulation unit 20, and are incident through the middle region 31 and the edge region 32, after multiple reflection cycles, the light reflection surface 23 emits the light entering the light circulation unit 20 as much as possible, so as to improve the light emitting efficiency. Finally, all the translucent light beams emitted from the middle region 31 (high light transmittance region) of the light emission surface 22 are high-luminance light B, and all the translucent light beams emitted from the edge region 32 (low light transmittance region) of the light emission surface 22 are low-luminance light a. The high-brightness light B and the low-brightness light a are imaged and emitted by the imaging unit 40 to form illumination light with uneven brightness distribution, which has the same light emitting state on the light emitting surface 22, and has high middle brightness and low edge brightness, so that the illumination device applied to the light source system 100 realizes uneven illumination distribution.
The first laser 11 and the second laser 12 may emit monochromatic laser light of the same color, or monochromatic laser light of different colors.
In other embodiments, the light emitting unit 10 may further include a plurality of laser light emitting units.
Fig. 2 is a schematic structural diagram of a light source system according to a second embodiment of the present invention. The difference from fig. 1 is that the light recycling unit 20 further includes a light incident surface 21, and the light emitted from the light emitting unit 10 enters the light recycling unit 20 through the light incident surface 21, is reflected and conducted by the light reflecting surface 23, and then is emitted through the light emitting surface 22.
In the present embodiment, the light emitting unit 10 emits light of the same color as the illumination light. Here, the light emitting unit 10 that emits the same color as the illumination light will be referred to as an illumination light emitting unit 10'. As used herein, "same color" means that the spectra are substantially the same and the peak wavelengths fall within the same color range. The light emitting unit 10 is located outside the light circulation unit 20, corresponding to the light incident surface 21 of the light circulation unit 20; and the light incidence surface 21 of the light circulation unit 20 is plated with an antireflection film 26, and a gap 15 is formed between the illumination light emitting unit 10' and the light circulation unit 20. The gap 15 and the light incident surface 21 coated with the antireflection film 26 have a refractive index difference, so that the antireflection film 26 reduces the reflection loss of incident illumination light and improves the light incident efficiency.
As shown in fig. 2, the illumination light emitting unit 10 ' emits illumination light rays (including a first light ray 11 ' and a second light ray 12 '). The first light 11 'and the second light 12' enter the light recycling unit 20 through the light incident surface 21 of the light recycling unit 20, and the light incident surface 21 is coated with the antireflection film 26, so that the first light 11 'and the second light 12' reduce reflection loss when entering the light recycling unit 20, thereby improving light incident efficiency. The first light 11 ' is reflected and conducted on the light reflection surface 23 of the light circulation unit 20 provided with the high-reflectivity coating, and the middle area 31 (high-light-transmittance area) of the light distribution control unit 30 incident on the light exit surface 22 forms more first light transmission beams 111 ' and less first light reflection beams 112 '; the second light 12 ' is reflected and transmitted on the light reflection surface 23 of the light circulation unit 20 provided with the high-reflectivity coating, and the edge region 32 (low light transmittance region) of the light distribution control unit 30 incident on the light exit surface 22 forms a less second light transmission beam 121 ' and a more second light reflection beam 122 '. The first light reflection beam 112 'and the second light reflection beam 122' are reflected and circulated again by the light reflection surface 23 in the light circulation unit 20, and enter through the middle region 31 and the edge region 32, and after multiple reflection cycles, the light reflection surface 23 emits the light entering the light circulation unit 20 as much as possible, so as to improve the light emitting efficiency. Finally, all the translucent light beams emitted from the middle region 31 (high light transmittance region) of the light emission surface 22 are high-luminance light b, and all the translucent light beams emitted from the edge region 32 (low light transmittance region) of the light emission surface 22 are low-luminance light a. The high-brightness light b and the low-brightness light a are emitted and imaged by the imaging unit 40 to form illumination light with uneven brightness distribution, which has the same light emitting state on the light emitting surface 22, and has high middle brightness and low edge brightness, so that the illumination device applied by the light source system 100 has uneven illumination distribution.
The illumination light emitted by the illumination light emitting unit 10' may be a single color LED light or a composite light source (e.g., a composite light of multiple color light sources).
Fig. 3 is a schematic structural diagram of a light source system according to a third embodiment of the invention. The difference from fig. 2 is that the light emitting unit 10 is located inside the light recycling unit 20 and on the opposite side of the light exit surface 22. In the present embodiment, the light emitting unit 10 is located on the light incident surface 21.
The light emitted from the light emitting unit 10 can be directly incident on the light reflecting surface 23 of the light recycling unit 20, and the reflection loss of the light entering the light recycling unit 20 is reduced.
The process of forming the light with non-uniform brightness distribution to realize non-uniform illumination distribution of the illumination device using the light source system 100 is the same as that in the second embodiment, and is not repeated herein.
Fig. 4 is a schematic structural diagram of a light source system according to a fourth embodiment of the invention. The difference from fig. 3 is that the light emitting unit 10 is located inside the light recycling unit 20 and on the adjacent surface of the light exit surface 22. In this embodiment, the light emitting unit 10 is located on the light reflecting surface 23.
The light emitted from the light emitting unit 10 can be directly incident on the light reflecting surface 23 of the light recycling unit 20, so that the light can be sufficiently homogenized before reaching the light emitting surface 22, which is beneficial to forming the expected outgoing light distribution and avoiding the outgoing light distribution deviation caused by the fact that the light beam directly reaches the light emitting surface 22 without being homogenized.
The process of forming the light with non-uniform brightness distribution to realize non-uniform illumination distribution of the illumination device using the light source system 100 is the same as that in the second embodiment, and is not repeated herein.
Referring to fig. 5, which is a schematic structural diagram of an illumination device of the present invention, an illumination device 200 includes the light source system 100.
The light source system 100 forms light with non-uniform brightness distribution, so that the lighting device 200 using the light source system 100 can realize non-uniform illumination distribution by a single light source. The lighting device can be applied to the fields of car lamp patterned lighting, stage lighting, architectural lighting and the like.
Fig. 6a is a schematic diagram of the distribution of different transmissive areas on light exit surface 22 according to the present invention. Here, a coordinate system is established with the midpoint O of the light exit surface 22 provided with the light distribution control unit 30 as the origin, and the light exit surface 22 has a length x and a width y. Fig. 6b is a schematic diagram showing the positional distribution of the transmission regions of the light distribution control unit 30 provided on the light exit surface 22 in the form of a coating film (selective light transmission film), and the light transmittances of the regions a1 to a5 are 100%, 80%, 50%, 20%, and 5% in this order. Referring to fig. 7 and 8, where a 1-a 5 corresponds to B1-B5 and C1-C5, it is known that the luminous flux distribution increases with the increase of the light transmittance, and the illuminance also increases at the same time, that is, the light source system 100 of the present invention is implemented to control the light forming the uneven luminance distribution by providing the light exit surface 22 with the transmission regions having different light transmittances, so that the illumination apparatus 200 using the light source system 100 implements the uneven illuminance distribution.
According to the invention, two coating films with transmission areas with different light transmittances are arranged on the light emergent surface of the light circulation unit, so that light entering the light circulation unit is emitted through different transmission areas on the light emergent surface to form light with uneven brightness distribution, and the light with uneven brightness distribution is imaged through the imaging unit to form illumination light. Meanwhile, the light entering the light recycling unit is reflected out as much as possible through the high-reflectivity coating film on the light reflecting surface of the light recycling unit, and at least part of the light from the light emergent surface is reflected back to the light emergent surface by the light reflecting surface, so that the light emergent efficiency is improved. The peripheral light emitting unit corresponds to the light incident surface and emits illumination light, and the light incident surface is provided with an antireflection film to reduce incident light reflection and improve incident light efficiency; the peripheral light emitting unit corresponds to the wavelength selective transmission area on the light reflection surface, performs laser emission, is incident on the wavelength conversion unit to convert laser into fluorescence, and is emitted through the transmission area with different light transmission rates to form fluorescence light with uneven brightness distribution. The light source system is applied to the lighting device, so that the lighting device realizes different illumination distributions by using a single light source, and has the advantages of simple structure and low cost.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A light source system, comprising:
a light emitting unit emitting light;
the light emitted by the light emitting unit is reflected and conducted in the light circulating unit through the light reflecting surface and emitted from the light emitting surface, and at least part of light from the light emitting surface is reflected back to the light emitting surface by the light reflecting surface;
the light distribution control unit is positioned on the light emitting surface of the light circulation unit, comprises at least two transmission areas with different light transmittances, and emits the light reflected and conducted by the light reflecting surface in uneven light distribution after passing through the light distribution control unit; and
and an imaging unit that images the non-uniform light to form illumination light.
2. The light source system according to claim 1, wherein the transmission region includes a central region and an edge region surrounding the central region, and the light transmittance of the central region is greater than that of the edge region.
3. The light source system of claim 1, wherein the light reflecting surface is provided with a high reflectivity coating.
4. The light source system according to claim 3, wherein the light distribution control unit is a selectively light-transmitting film and is disposed on the light exit surface of the light recycling unit.
5. The light source system according to claim 3, wherein the light emitting unit emits light of the same color as the illumination light;
the light circulation unit further comprises a light incidence surface, the light emitting unit is positioned outside the light circulation unit, and light emitted by the light emitting unit enters the light circulation unit through the light incidence surface; and
the light incidence surface of the light circulation unit is provided with an antireflection film, and a gap is formed between the illumination light emitting unit and the light circulation unit.
6. The light source system according to claim 1, wherein the light emitting unit is a laser light emitting unit that emits laser light;
the light-emitting unit is positioned outside the light circulation unit, and a wavelength selective transmission area is arranged at the position, close to the light-emitting unit, of the light circulation unit and corresponds to the light-emitting unit; and
and a light reflection surface in the light circulation unit is provided with a wavelength conversion unit, the laser enters the light circulation unit, and the wavelength conversion unit converts the laser into fluorescence to be emitted.
7. A light source system according to claim 3, wherein the light emitting unit is located inside the light recycling unit and opposite to the light exit surface.
8. A light source system according to claim 3, wherein the light emitting unit is located inside the light recycling unit and at an adjacent surface of the light exit surface.
9. The light source system according to claim 1, wherein the light emitted by the light emitting unit is a monochromatic laser light or a monochromatic LED light or a composite light; the light circulation unit is a solid optical waveguide or a hollow optical device.
10. A lighting device comprising the light source system according to any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018114463100 | 2018-11-29 | ||
| CN201811446310 | 2018-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111237711A true CN111237711A (en) | 2020-06-05 |
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ID=70852604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910585130.9A Pending CN111237711A (en) | 2018-11-29 | 2019-07-01 | Light source system and lighting device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111237711A (en) |
| WO (1) | WO2020108277A1 (en) |
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| EP0274325A1 (en) * | 1986-12-23 | 1988-07-13 | Valeo Vision | Coloured light-emitting signal lamp with a colourless lens, especially for motor vehicles |
| CN101495913A (en) * | 2006-07-24 | 2009-07-29 | 松下电器产业株式会社 | Planar illumination device and liquid crystal display device using same |
| CN102788318A (en) * | 2012-08-30 | 2012-11-21 | 霍永峰 | Lens for light distribution of LED (light emitting diode) lamp and lamp thereof |
| CN202868362U (en) * | 2012-08-28 | 2013-04-10 | 飞利浦(中国)投资有限公司 | Illumination device |
| US20160327231A1 (en) * | 2013-12-06 | 2016-11-10 | Konica Minolta, Inc. | Surface-Emitting Unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1451066A (en) * | 1973-02-14 | 1976-09-29 | Ass Eng Ltd | Lighting units |
| JPS61259401A (en) * | 1985-05-13 | 1986-11-17 | 市光工業株式会社 | Head lamp |
| FR2605086B1 (en) * | 1986-10-10 | 1991-03-15 | Cibie Projecteurs | LIGHTING DEVICES WITH ELECTROCHROMIC SCREEN, PARTICULARLY FOR MOTOR VEHICLES |
| FR2965889B1 (en) * | 2010-10-12 | 2016-01-08 | Valeo Vision | LIGHTING AND / OR SIGNALING DEVICE ICE WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT |
| DE102012201790A1 (en) * | 2012-02-07 | 2013-08-08 | Osram Gmbh | LIGHTING DEVICE WITH A PUMP PLASMA MATRIX AND METHOD FOR OPERATING THIS LIGHTING DEVICE |
| JP5935067B2 (en) * | 2013-10-10 | 2016-06-15 | パナソニックＩｐマネジメント株式会社 | Wavelength conversion plate and lighting device using the same |
| CN107304998B (en) * | 2016-04-20 | 2021-02-09 | 深圳市绎立锐光科技开发有限公司 | Lighting device and vehicle headlamp device |
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2019
- 2019-07-01 CN CN201910585130.9A patent/CN111237711A/en active Pending
- 2019-11-11 WO PCT/CN2019/116984 patent/WO2020108277A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0274325A1 (en) * | 1986-12-23 | 1988-07-13 | Valeo Vision | Coloured light-emitting signal lamp with a colourless lens, especially for motor vehicles |
| CN101495913A (en) * | 2006-07-24 | 2009-07-29 | 松下电器产业株式会社 | Planar illumination device and liquid crystal display device using same |
| CN202868362U (en) * | 2012-08-28 | 2013-04-10 | 飞利浦(中国)投资有限公司 | Illumination device |
| CN102788318A (en) * | 2012-08-30 | 2012-11-21 | 霍永峰 | Lens for light distribution of LED (light emitting diode) lamp and lamp thereof |
| US20160327231A1 (en) * | 2013-12-06 | 2016-11-10 | Konica Minolta, Inc. | Surface-Emitting Unit |
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| Publication number | Publication date |
|---|---|
| WO2020108277A1 (en) | 2020-06-04 |
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