CN105570792A - Low-cost and light LED near light module set of automobile lighting lamps - Google Patents
Low-cost and light LED near light module set of automobile lighting lamps Download PDFInfo
- Publication number
- CN105570792A CN105570792A CN201610086745.3A CN201610086745A CN105570792A CN 105570792 A CN105570792 A CN 105570792A CN 201610086745 A CN201610086745 A CN 201610086745A CN 105570792 A CN105570792 A CN 105570792A
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- Prior art keywords
- light
- dipped beam
- radiator
- led
- module
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Classifications
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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]
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
-
- 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
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
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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
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention relates to a low-cost and light LED near light module set of automobile lighting lamps. The LED near light module set comprises a radiator, a reflecting mirror, a light shielding plate, a reflecting plate, a lens, and a driving module circuit plate assembly, wherein an LED light source is fixedly arranged on the upper part of the driving module circuit plate assembly, and a driving module is fixedly arranged on the lower part of the driving module circuit plate assembly; the light shielding plate is fixedly arranged under the driving module circuit plate assembly, the radiator, the light shielding plate and the driving module circuit plate assembly surround the driving module in a relatively closed space, and the interference which is caused by extraneous electric signals to the driving module is shielded; the light shielding plate is clung to the driving module, and dissipates the heat of the driving module; the radiator is a metal stamping plate material, the metal stamping plate material is surrounded in a covering shell shape, a cavity body space is arranged inside the radiator, and the driving module circuit plate assembly, the light shielding plate and the reflecting plate are arranged in the cavity body space; the reflecting plate is fixedly clung to the upper part of the light shielding plate, the reflecting plate reflects the light which is emitted by the reflecting mirror to the reflecting mirror again, and then the light is emitted by the lens, so that the using ratio of the inner light of the LED near light module set can be improved.
Description
Technical field
The present invention relates to a kind of LED dipped beam module of automobile lighting lamp, specifically, be a kind of low cost light-weighted LED dipped beam module of automobile lighting lamp, belong to automobile lighting lamp technical field.
Background technology
Automobile is provided with headlamp, and headlamp comprises upper beam combination dipped beam group, and wherein, dipped beam group is mainly used in closely throwing light on.
At present most dipped headlights group uses halogen light source on the market, but the dipped headlights group of halogen light source takes up room comparatively large, advantages such as it is little that LED light source has volume, and energy consumption is low, and the life-span is long and to be more and morely applied in automotive lighting.Because LED headlamp cost is higher, Chinese market only belongs to the configuration of high-end flagship car.
How to reduce the cost of LED dipped beam module, enable to be widely used in low and middle-end family car market, simultaneously for adapting to compact-type automobile, reducing the volume of LED dipped beam module further, reducing its weight, become the technical barrier that this area needs solution badly.
Summary of the invention
The object of this invention is to provide a kind of lower-cost LED headlamp, reduce the volume of LED dipped beam module simultaneously further, reduce its weight, cater to huge low and middle-end home vehicle market.
The present invention takes following technical scheme:
A low cost light-weighted LED dipped beam module for automobile lighting lamp, comprises radiator 6, speculum 7, shadow shield 4, reflecting plate 5, lens 1, driver module wiring board assembly 8; Described driver module wiring board assembly 8 top is fixed with LED light source 8-1, and bottom is fixedly installed driver module 8-2; Described shadow shield 4 is fixedly located at below described driver module wiring board assembly 8, described driver module 8-2 is enclosed within a relatively airtight space by radiator 6, shadow shield 4, driver module wiring board assembly 8, the interference that the extraneous signal of telecommunication sent of shielding produces driver module 8-2; Described shadow shield 4 fits, for driver module 8-2 dispels the heat with driver module 8-2; Described radiator 6 is metal pressing, and described metal pressing surrounds case shape, and its inside has cavity space, arranges driver module wiring board assembly 8, shadow shield 4 and reflecting plate 5 in described cavity space; Described reflecting plate 5 is close to fixing with the top of described shadow shield 4, and speculum 7 is penetrated the light come and again reflexed on speculum 7 by described reflecting plate 4, and then penetrates from lens 1, in order to promote the utilization rate of light in LED dipped beam module.Described LED dipped beam module, adopt projection-type ellipsoid optical system, the light that LED light source for ellipsoid first focus is sent by reflective surface to ellipsoid second focus, shadow shield again by being positioned at ellipsoid second focus blocks, produce directional light via after lens reflection, and the dipped beam light type meeting lighting regulations can be formed.
Further, also comprise mounting bracket 3, described LED dipped beam module is fixed in headlamp by described mounting bracket 3, and described speculum 7 is concave structure, and the opening of this concave structure is towards the direction away from automobile.
Further, radiator 6 material is aluminum alloy plate materials, adopts Sheet Metal Forming Technology to make.
Further, described shadow shield 4 adopts the mode of welding to install with radiator 6 phase.
Further, multiple fin is provided with bottom shadow shield 4.
Further, described fin surface can scribble thermal dispersant coatings; Reflecting plate 5 is stainless sheet steel; Described shadow shield 4, reflecting plate 5 are installed mutually by riveting method.
Further, be fixed on mounting bracket 3 behind speculum 7, shadow shield 4, reflecting plate 5, driver module wiring board assembly 8 and radiator 6 pin-and-hole location.
Further, described LED low-beam light group also comprises lens carrier 2, and described lens carrier 2 is fixedly connected with described mounting bracket 3, and by fixed thereon for lens 1.
Further, described lens carrier 2 adopts PC material, is fixedly installed on the opening part of concave ball surfaces, blocks the opening of concave structure, and described lens carrier 2 is provided with groove, and lens 1 are stuck in lens carrier by groove.
Further, described lens 1 are hyperbolicity convex lens, and one side is aspheric surface, and another side is sphere.
Further, described driver module wiring board assembly 8 is the wiring board of aluminium nitride ceramics composite epoxy resin material.
Further, there is inclination angle with the mounting plane of mounting bracket 3 with horizontal plane in described radiator 6, improves light efficiency, reduction dispersion.
Beneficial effect of the present invention is:
1) driver module of wiring board is incorporated on one piece of driver module wiring board assembly, and without the need to being connected the driver module of external by wire harness, structure is more compact, reduces overall volume, reduces cost.
2) within the relative confined space that dipped beam module is surrounded by shadow shield 4, radiator 6, driver module wiring board assembly 8 cleverly, thus prevent external signal from producing interference to it, eliminate driver module radome, reduce costs, reduce volume;
3) shadow shield and driver module are close to setting, implement heat radiation to driver module, effectively alleviate the heat radiation burden of radiator 6; And then radiator can adopt pressing sheet material material, and surround an inner space, by vibrational power flow such as driver module wiring board assemblies within this inner space, while well can completing heat sinking function, also eliminate the volumetric spaces taken needed for radiator itself.
4) radiator 6 material is aluminum alloy plate materials, employing Sheet Metal Forming Technology is made, and comparing other aluminium alloy compression casting radiators has better radiating effect, and during work, heat distribution is even, and weight comparatively other aluminium alloy compression casting radiators have and comparatively significantly reduce, cost also can have obvious reduction.
5) LED light source and driver module wiring board thereof are the wiring boards employing aluminium nitride ceramics composite epoxy resin material first in automotive lighting module.Heat conductivility is good, and cost is lower.
6) there is inclination angle in the mounting plane of radiator and mounting bracket and horizontal plane, improves light efficiency, reduces dispersion.
7) light source of originally waste can be reflected back speculum by reflecting plate arrange again, can the utilization rate of light in elevator system, improves module light efficiency.
Accompanying drawing explanation
Fig. 1 is the detonation configuration schematic diagram of dipped beam module of the present invention;
Fig. 2 is the profile of dipped beam module of the present invention;
Fig. 3 is that dipped beam module internal light of the present invention moves towards schematic diagram;
Fig. 4 is three-dimensional appearance view of the present invention.
In figure, 1 is lens, and 2 is lens carrier, and 3 is mounting bracket, and 4 is shadow shield, and 5 is reflecting plate, and 6 is radiator, and 7 is speculum, and 8 is driver module wiring board assembly.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in Figure 1, embodiments provide a kind of dipped beam module, described module is arranged in headlamp, and described module comprises: radiator 6, speculum 7, shadow shield 4, reflecting plate 5, hyperbolicity convex lens 1, lens carrier 2, mounting bracket 3, LED light source 8-1 and driver module wiring board 8 thereof.
Wherein, see Fig. 2, all elements of this module are fixed in headlamp by mounting bracket 3, and described speculum 7 is concave structure, and the opening of this concave structure is towards the direction away from automobile, and this speculum 7 is a part for spheroid.
See Fig. 2, wiring board assembly 8 is the circuit board integrating LED light source and driver module, and the advantage of this design is not need inner wire harness to connect driver module and LED light source, provides cost savings and space while meeting LED function.
See Fig. 1-Fig. 2, described radiator 6 material is aluminum alloy plate materials, employing Sheet Metal Forming Technology is made, compare other aluminium alloy compression casting radiators and have better radiating effect, during work, heat distribution is even, and weight comparatively other aluminium alloy compression casting radiators have and comparatively significantly reduce, adopt aluminum alloy plate materials as radiator material, heatsink weight and cost declined to a great extent.
See Fig. 2-Fig. 3, described shadow shield 4 is aluminum alloy material, is positioned at ellipsoid inside, is made by extrusion process, adopts the mode of welding to install with radiator 6 phase, and fits with driver module, for driver module dispels the heat;
See Fig. 1-Fig. 3, this shadow shield is made up of two parts, shadow shield 4 and reflecting plate 5, wherein, is provided with multiple fin bottom shadow shield 4, the direction arrangement that the plurality of fin flows according to air, thus realizes quick heat radiating; Further, described fin surface can scribble thermal dispersant coatings, improves the radiating effect of shadow shield; Reflecting plate 5 is stainless sheet steel; Described shadow shield 4, reflecting plate 5 are installed mutually by riveting method.
See Fig. 1-Fig. 2, speculum 7, shadow shield 4, reflecting plate 5, LED circuit board 8 and radiator 6 pin-and-hole are fixed on mounting bracket 3 by tapping screw behind location; Described shadow shield 4 forms a relative airtight space jointly with radiator 6, in driver module is placed on, and the interference that the signal of telecommunication that the maskable external world sends produces driver module.
In sum, module, by using new radiator structure, makes module have better heat-sinking capability, simultaneously lighter in weight, and cost is lower.Because described module have employed new radiator structure and monoblock type wiring board, its cost obtains great reduction.
Described dipped headlights group also comprises: lens 1 and lens carrier 2.
Described lens 1 adopt glass as lens material dispersion comparatively plastic lens improve obviously, decrease and adopt plastic material and the situation that causes dead line to turn blue occurs;
Described lens carrier 2 adopts PC material, is fixedly installed on the opening part of concave ball surfaces, blocks the opening of concave structure, and described lens carrier 2 is provided with groove, and lens 1 are stuck in lens carrier by groove;
See Fig. 3, the light that part reflecting face reflects by the surface energy of described shadow shield 4, reflecting plate 5, reflexes on the inner surface of speculum 7, improves light efficiency;
These lens 1 are hyperbolicity convex lens, and one side is aspheric surface, and another side is sphere.Aspheric surface has the optical characteristics strengthening light luminance and definition, make light more clear when passing through these lens, bright, hyperbolicity convex lens are conducive to the focal length reducing module ellipsoid optical system, the opening size that lens simultaneously can be made to keep less, makes module maintain less volume.
As shown in Fig. 3 dotted arrow, the light that LED light source 8-1 sends on speculum 7 reflect, most light is reflected the inner plane of rear arrival lens 1 by speculum 7, then scioptics 1 reflect after to outside lens 1.Meanwhile, fraction light is by speculum 7 reflective plate 5, and the light reflection being continued reflective mirror 7 to reflect by reflecting plate is on the inner plane of lens 1, and is refracted into outside lens 1.
In prior art, the dipped beam module of halogen light source due to halogen light source light source energy consumption higher, life-span is shorter, usually needs to change light source, conventional LED dipped beam module often cost compared with high and volume is large, Heavy Weight, generally only be applied in high-end vehicle, the invention solves LED modular volume large, the shortcoming of Heavy Weight, also solve the higher difficult problem of LED module cost simultaneously, make module achieve the light-weighted design of low cost.Therefore, patent of the present invention has great market value and development space.
This module uses metal plate punching part as radiator first and is incorporated on same circuit board by LED light source and driver module thereof, solve is at present that the automobile lighting system of light source extensively needs additional cooling system to carry out the problem of active heat removal with LED, achieve the passive natural heat dissipation of module, make module achieve the light-weighted design of low cost.
The foregoing is only embodiments of the invention; the present invention is not limited to above-mentioned embodiment; every equivalent structure utilizing description of the present invention to do, as long as or reach technique effect of the present invention with identical means, all belong to protection scope of the present invention.
Claims (12)
1. the low cost of an automobile lighting lamp light-weighted LED dipped beam module, is characterized in that:
Comprise radiator (6), speculum (7), shadow shield (4), reflecting plate (5), lens (1), driver module wiring board assembly (8); Described driver module wiring board assembly (8) top is fixed with LED light source (8-1), and bottom is fixedly installed driver module (8-2);
Described shadow shield (4) is fixedly located at described driver module wiring board assembly (8) below, described driver module (8-2) is enclosed within a relatively airtight space by radiator (6), shadow shield (4), driver module wiring board assembly (8), the interference that the extraneous signal of telecommunication sent of shielding produces driver module (8-2);
Described shadow shield (4) and driver module (8-2) fit, and are driver module (8-2) heat radiation;
Described radiator (6) is metal pressing, described metal pressing surrounds case shape, its inside has cavity space, arranges driver module wiring board assembly (8), shadow shield (4) and reflecting plate (5) in described cavity space;
Described reflecting plate (5) is close to fixing with the top of described shadow shield (4), speculum (7) is penetrated the light come and is again reflexed on speculum (7) by described reflecting plate (4), and then from lens (1) injection, in order to promote the utilization rate of light in LED dipped beam module.
2. LED dipped beam module as claimed in claim 1, it is characterized in that: also comprise mounting bracket (3), described LED dipped beam module is fixed in headlamp by described mounting bracket (3), described speculum (7) is concave structure, and the opening of this concave structure is towards the direction away from automobile.
3. LED dipped beam module as claimed in claim 1, is characterized in that: radiator (6) material is aluminum alloy plate materials, adopts Sheet Metal Forming Technology to make.
4. LED dipped beam module as claimed in claim 1, is characterized in that: described shadow shield (4) adopts the mode of welding to install mutually with radiator (6).
5. LED dipped beam module as claimed in claim 1, is characterized in that: shadow shield (4) bottom is provided with multiple fin.
6. LED dipped beam module as claimed in claim 5, is characterized in that: described fin surface can scribble thermal dispersant coatings; Reflecting plate (5) is stainless sheet steel; Described shadow shield (4), reflecting plate (5) are installed mutually by riveting method.
7. LED dipped beam module as claimed in claim 2, is characterized in that: speculum (7), shadow shield (4), reflecting plate (5), driver module wiring board assembly (8) and radiator (6) pin-and-hole are fixed on mounting bracket (3) behind location.
8. LED dipped beam module as claimed in claim 2, it is characterized in that: described LED low-beam light group also comprises lens carrier (2), described lens carrier (2) is fixedly connected with described mounting bracket (3), and by fixed thereon for lens (1).
9. LED dipped beam module as claimed in claim 8, it is characterized in that: described lens carrier (2) adopts PC material, be fixedly installed on the opening part of concave ball surfaces, block the opening of concave structure, described lens carrier (2) is provided with groove, and lens (1) are stuck in lens carrier by groove.
10. LED dipped beam module as claimed in claim 8, is characterized in that: described lens (1) are hyperbolicity convex lens, and one side is aspheric surface, and another side is sphere.
11. LED dipped beam modules as claimed in claim 1, is characterized in that: the wiring board that described driver module wiring board assembly (8) is aluminium nitride ceramics composite epoxy resin material.
12. LED dipped beam modules as claimed in claim 2, is characterized in that: mounting plane and the horizontal plane of described radiator (6) and mounting bracket (3) exist inclination angle, improve light efficiency, reduce dispersion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086745.3A CN105570792B (en) | 2016-02-16 | 2016-02-16 | A kind of LED dipped beam modules of automobile lighting lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086745.3A CN105570792B (en) | 2016-02-16 | 2016-02-16 | A kind of LED dipped beam modules of automobile lighting lamp |
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| CN105570792A true CN105570792A (en) | 2016-05-11 |
| CN105570792B CN105570792B (en) | 2018-03-23 |
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| CN201610086745.3A Active CN105570792B (en) | 2016-02-16 | 2016-02-16 | A kind of LED dipped beam modules of automobile lighting lamp |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990277A (en) * | 2017-12-25 | 2018-05-04 | 上海小糸车灯有限公司 | Car light reflecting LED module system and vehicle lamp assembly |
| CN108302448A (en) * | 2016-08-26 | 2018-07-20 | 天津工大海宇照明部品有限公司 | A kind of structure of automobile headlamp LED lamplight module |
| CN108413362A (en) * | 2018-05-09 | 2018-08-17 | 嘉兴朗远光学技术有限公司 | Radiator and its processing method and automobile-used LED lens module comprising the radiator |
| CN108692256A (en) * | 2017-08-09 | 2018-10-23 | 常州星宇车灯股份有限公司 | A kind of LED distance light lens module |
| CN109915786A (en) * | 2019-04-26 | 2019-06-21 | 苏州弘瀚光电有限公司 | Super large irradiating angle automobile-used LED lens group |
| WO2019128353A1 (en) * | 2017-12-25 | 2019-07-04 | 华域视觉科技(上海)有限公司 | Vehicle light reflective-type led module system and vehicle light assembly |
| CN109973914A (en) * | 2017-12-07 | 2019-07-05 | 法雷奥照明公司 | Lamp module for motor vehicles |
| CN110056836A (en) * | 2019-04-16 | 2019-07-26 | 上海文歆汽车科技有限公司 | Automobile ADB LCD lamp |
| CN110173669A (en) * | 2019-06-25 | 2019-08-27 | 华域视觉科技(上海)有限公司 | Car light optical element assembly, car light and automobile |
| CN110762478A (en) * | 2019-11-29 | 2020-02-07 | 芜湖安瑞光电有限公司 | LED headlamp capable of realizing internal atmosphere lighting effect |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108302448A (en) * | 2016-08-26 | 2018-07-20 | 天津工大海宇照明部品有限公司 | A kind of structure of automobile headlamp LED lamplight module |
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| WO2019128353A1 (en) * | 2017-12-25 | 2019-07-04 | 华域视觉科技(上海)有限公司 | Vehicle light reflective-type led module system and vehicle light assembly |
| CN108413362A (en) * | 2018-05-09 | 2018-08-17 | 嘉兴朗远光学技术有限公司 | Radiator and its processing method and automobile-used LED lens module comprising the radiator |
| CN110056836A (en) * | 2019-04-16 | 2019-07-26 | 上海文歆汽车科技有限公司 | Automobile ADB LCD lamp |
| CN109915786A (en) * | 2019-04-26 | 2019-06-21 | 苏州弘瀚光电有限公司 | Super large irradiating angle automobile-used LED lens group |
| CN110173669A (en) * | 2019-06-25 | 2019-08-27 | 华域视觉科技(上海)有限公司 | Car light optical element assembly, car light and automobile |
| CN110762478A (en) * | 2019-11-29 | 2020-02-07 | 芜湖安瑞光电有限公司 | LED headlamp capable of realizing internal atmosphere lighting effect |
| CN110762478B (en) * | 2019-11-29 | 2023-11-14 | 芜湖安瑞光电有限公司 | LED head lamp for realizing internal atmosphere light effect |
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| Publication number | Publication date |
|---|---|
| CN105570792B (en) | 2018-03-23 |
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Address after: 201821 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee after: Hua Yu vision technology (Shanghai) Co., Ltd. Address before: 201821 Yecheng Road, Jiading District, Jiading District, Shanghai Patentee before: Xiaoxi Car Lights Co., Ltd., Shanghai |