CN106427764B - A kind of car headlamp automatic regulating system - Google Patents
A kind of car headlamp automatic regulating system Download PDFInfo
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- CN106427764B CN106427764B CN201610803518.8A CN201610803518A CN106427764B CN 106427764 B CN106427764 B CN 106427764B CN 201610803518 A CN201610803518 A CN 201610803518A CN 106427764 B CN106427764 B CN 106427764B
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- light source
- led light
- spherical
- surface led
- outside surface
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
- B60Q1/076—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle by electrical means including means to transmit the movements, e.g. shafts or joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/20—Multi-color single source or LED matrix, e.g. yellow blinker and red brake lamp generated by single lamp
Abstract
A kind of car headlamp automatic regulating system, the plurality of LED light source being arranged with spherical surface, the method combined using reflected light with direct light is controlled with the combination that PLC carries out position and quantity to LED light source piece, realizes the automatic adjustment of automobile headlight illumination intensity and lighting position.Specific device is by reflector, spherical outside surface LED light source bracket, spherical outside surface LED light source, spherical outside surface LED light source bracket connecting tube, Internal Spherical Surface LED light source bracket connecting tube, Internal Spherical Surface LED light source bracket, Internal Spherical Surface LED light source, front lamp cover, PLC control device composition；PLC control device receives the switching signal of light manipulation switch and the input signal of sensor, it is automatically adjusted according to lighting position and intensity of the brightness of ambient enviroment to headlamp, it realizes the lighting requirement of distance light, dipped beam, Qiang Guang, dim light, left-hand light, dextrad light and combinations thereof, optimizes illuminating effect.
Description
Technical field
Car headlamp is the necessary device of automobile normally travel under the conditions of night and insufficient light, be automotive lighting with
The important component of signal system is widely applied in all kinds of automobiles.Its illuminating effect, reliability, convenience are always each
Automotive engineering research department and automobile manufacturing enterprise are endeavoured to improve and improved target in Automobile Design.The present invention relates to one kind
Car headlamp automatic regulating system.
Background technique
The headlight for vehicles light source actually used at present is based on xenon lamp.Also part begins to use LED light source.Make at present
Although car headlamp can change distance-light, the illumination intensity and lighting position of headlamp can not be automatically adjusted,
Vision blind spot and security risk are caused to driving.Before due to the light source control and heat dissipation of halogen lamp and xenon lamp the problems such as,
Develop the automatic adjustment technology of car headlamp to be restricted.With the maturation and application of LED light source, certainly for car headlamp
Dynamic adjusting provides condition.Continuous improvement with running car to lighting demand needs a kind of car headlamp to automatically adjust
System meets higher requirement.
Summary of the invention
The object of the present invention is to provide a kind of car headlamp automatic regulating systems.This system uses reflected light and direct light
The method combined, with spherical surface plurality of LED light source, LED light source consisting chip arrays carry out PLC control certainly with multiple sets of light sources point
The dynamic control mode with both, realizes the adjusting of headlamp lighting intensity and lighting position.PLC is to LED light source piece
It is combined and is decoded by PLC program realization with the control of quantity in position.The specific device of this system is by reflector, spherical outside surface LED light
Source bracket, spherical outside surface LED light source, spherical outside surface LED light source bracket connecting tube, Internal Spherical Surface LED light source bracket connecting tube, Internal Spherical Surface
LED light source bracket, Internal Spherical Surface LED light source, front lamp cover, PLC control device composition.Control device receives opening for light manipulation switch
OFF signal realizes the lighting requirement of distance light, dipped beam, Qiang Guang, dim light, cantankerous light, right strong light and combinations thereof, meanwhile, by front side
The luminosity sensor of installation, according to the intensity of illumination of the brightness of ambient enviroment and opposite car light to the lighting position of headlamp and by force
Degree automatically adjusts, and powers on a certain number of LED light sources of spherical outside surface LED light source different location, light is through reflector
Reflection through front lamp cover illuminate vehicle front road.After Internal Spherical Surface LED light source is powered, light directly illuminates vehicle front road.
Optimization and optimal illumination effect are realized in the variation of adaptating lighting environment.
According to the present invention, reflector is a part of elliposoidal surface of shell, is a thin walled shell part.Inner surface plating is anti-
Light film, when LED light source electrified light emitting, source light is projected after reflector reflects to vehicle front.
According to the present invention, spherical outside surface LED light source bracket is a hemisphere face thin walled shell part, installs on its outer surface
It is arranged by three loops, circumferentially equally distributed encapsulated LED light source.The wiring of every sheet laser passes through spherical outside surface LED light
Source bracket is pooled in spherical outside surface LED light source bracket connecting tube, after reflector in outer spherical LED light source bracket concave surface
It draws in portion.
According to the present invention, spherical outside surface LED light source is encapsulated white light LEDs piece.In outer spherical LED light source bracket evagination
By three circle circumferences on surface.Outer ring shares 10 LED light source pieces, is uniformly distributed along big circumference.Centre circle has 8 LED light sources
Piece is distributed along middle even circumferential.Inner ring has 6 LED light source pieces, is uniformly distributed along small circumference.
According to the present invention, spherical outside surface LED light source bracket connecting tube, is a tubular member, to support spherical outside surface LED light
Source bracket, and spherical outside surface LED light source bracket is connected with reflector.The wiring of spherical outside surface LED light source passes through spherical outside surface LED
Light source bracket connecting tube is drawn out of lamp body.
According to the present invention, Internal Spherical Surface LED light source bracket connecting tube, is a tubular member, to support Internal Spherical Surface LED light
Source bracket, and Internal Spherical Surface LED light source bracket is connected with reflector.The wiring of Internal Spherical Surface LED light source passes through Internal Spherical Surface LED
Light source bracket connecting tube is drawn out of lamp body.
According to the present invention, Internal Spherical Surface LED light source bracket is a hemisphere face thin walled shell part, installs on its inner surface
Circumferentially equally distributed encapsulated LED light source is arranged by two loops.The wiring of every sheet laser passes through Internal Spherical Surface LED light source
Bracket is pooled in spherical outside surface LED light source bracket connecting tube, from reflector rear portion in interior spherical LED light source bracket convex surface
It draws.
According to the present invention, Internal Spherical Surface LED light source is encapsulated white light LEDs piece.In interior spherical LED light source bracket indent
By two circle circumferences on surface.Outer ring shares 8 LED light source pieces, is uniformly distributed along big circumference.Inner ring has 4 LED light sources
Piece is distributed along middle even circumferential.There is a piece of LED light source piece at interior spherical LED light source bracket center.
According to the present invention, the core cell of control device is 45 point PLC, carries out power control to 37 LED light source pieces.
The input terminal of PLC has two class input values, and the first kind is the switching value of manual signal light control executor input, and the second class is vehicle-mounted
The analog input of intensity of light and luminance sensor input.The voltage and current input terminal of analog quantity connects through operational amplifier
Analog-digital converter, then PLC is accessed through input photocoupler.On-off signal signal and analog input signal are through PLC program
After processing, through output resistance and output display LED, is exported by output photoelectric coupling pipe and give output power triode, made outer, interior
The LED light source of different location and different number is powered on spherical LED light source bracket.Realize the full-automatic excellent of automobile headlight illumination
Change and adjusts.
According to the present invention, PLC control device is made of following elements: output display LED array is shown for automobile instrument panel
Headlamp lighting state.Output photoelectric couples pipe array, isolation PLC output end and every LED light source piece strong and weak electricity, avoids doing
It disturbs.Output power transistors array is the electronic switch of every LED light source piece.Vehicle lamp light source LED array, headlamp fuse,
Vehicle lamp light source LED piece, output power transistors, pressure limiting resistance, output photoelectric coupling pipe, output display LED, current-limiting resistance, mould
Quasi- input amplifier, analog input negative terminal, analog quantity current input terminal, input resistance, analog quantity voltage input terminal,
Input analog-to-digital converter inputs photocoupler, On-off signal switch.
Detailed description of the invention
Attached drawing combination embodiment illustrates concrete principle and structure of the invention:
For attached drawing for the main section view of present example device and to cross-sectional view, figure label indicates part or position.
Wherein:
Fig. 1 is a kind of main sectional view of car headlamp automatic regulating system.In figure: 1 is reflector, and 2 be spherical outside surface LED
Light source bracket, 3 be spherical outside surface LED light source, and 4 be spherical outside surface LED light source bracket connecting tube, and 5 be the connection of Internal Spherical Surface LED light source bracket
Pipe, 6 be Internal Spherical Surface LED light source bracket, and 7 be Internal Spherical Surface LED light source, and 8 be front lamp cover.
Fig. 2 is a kind of A direction view of car headlamp automatic regulating system.In figure: 1 is reflector, and 2 be spherical outside surface LED
Light source bracket, 3 be spherical outside surface LED light source, and 6 be Internal Spherical Surface LED light source bracket, and 7 be Internal Spherical Surface LED light source.
Fig. 3 is a kind of light path schematic diagram of car headlamp automatic regulating system.
Fig. 4 is a kind of PLC control device schematic diagram of car headlamp automatic regulating system.In figure: 9 be PLC, and 10 be defeated
LED array is shown out, and 11 be output photoelectric coupling pipe array, and 12 be output power transistors array, and 13 be LED gusts of vehicle lamp light source
Column, 14 be automobile storage battery, and 15 be headlight fuse, and 16 be vehicle lamp light source LED, and 17 be output power transistors, and 18 be pressure limiting
Resistance, 19 be output photoelectric coupling pipe, and 20 be output display LED, and 21 be current-limiting resistance, and 22 be simulation input amplifier, and 23 are
Analog input negative terminal, 24 be analog quantity current input terminal, and 25 be input resistance, and 26 be analog quantity voltage input terminal,
27 be input analog-to-digital converter, and 28 be input photocoupler, and 29 be On-off signal switch.
Specific embodiment
This embodiment is a kind of specific structure of car headlamp automatic regulating system, illustrates dress of the present invention by example
The composition and working principle set.The object of the present invention is to provide a kind of car headlamp automatic regulating systems.This system is using anti-
The method that light is combined with direct light is penetrated, with spherical surface multiple spot LED light source, the mode combined with multiple groups luminous point realizes headlamp
The adjusting of lighting intensity and lighting position.PLC is combined LED light source piece position with the control of quantity by PLC program realization
And decoding.The specific device of this system is by reflector 1, spherical outside surface LED light source bracket 2, spherical outside surface LED light source 3, spherical outside surface LED
Light source bracket connecting tube 4, Internal Spherical Surface LED light source bracket connecting tube 5, Internal Spherical Surface LED light source bracket 6, Internal Spherical Surface LED light source 7 are preceding
Lampshade 8 forms.After the LED light source of the different location of spherical outside surface LED light source 3 is powered, light is after the reflection of reflector 1 through front lamp cover
Illuminate vehicle front road.After Internal Spherical Surface LED light source 7 is powered, light directly illuminates vehicle front road.
According to this embodiment, reflector 1 is a part of elliposoidal surface of shell, is a thin walled shell part.Interior table
Reflective membrane is plated in face, and when LED light source electrified light emitting, source light is projected after reflector reflects to vehicle front.
According to this embodiment, spherical outside surface LED light source bracket 2 is a hemisphere face thin walled shell part, on its outer surface
Installation is pressed three loops and is arranged, circumferentially equally distributed encapsulated LED light source.The wiring of every sheet laser passes through spherical outside surface
LED light source bracket 2 is pooled in spherical outside surface LED light source bracket connecting tube 4 in the concave surface of outer spherical LED light source bracket 2
Portion is drawn from 1 rear portion of reflector.
According to this embodiment, spherical outside surface LED light source 3 is encapsulated white light LEDs piece.In outer spherical LED light source bracket
By three circle circumferences in 2 convex surface.Outer ring shares 10 LED light source pieces, is uniformly distributed along big circumference.Centre circle has 8
LED light source piece is distributed along middle even circumferential.Inner ring has 6 LED light source pieces, is uniformly distributed along small circumference.
According to the present embodiment, spherical outside surface LED light source bracket connecting tube 4, is a tubular member, to support spherical outside surface
LED light source bracket 2, and spherical outside surface LED light source bracket 2 is connected with reflector 1.The wiring of spherical outside surface LED light source 3 passes through
Spherical outside surface LED light source bracket connecting tube 4 is drawn out of lamp body.
According to this embodiment, Internal Spherical Surface LED light source bracket connecting tube 5 is a tubular member, to support Internal Spherical Surface
LED light source bracket 6, and Internal Spherical Surface LED light source bracket 6 is connected with reflector 1.The wiring of Internal Spherical Surface LED light source 7 passes through
Internal Spherical Surface LED light source bracket connecting tube 5 is drawn out of lamp body.
According to the present embodiment, Internal Spherical Surface LED light source bracket 6 is a hemisphere face thin walled shell part, pacifies on its inner surface
Dress arranges circumferentially equally distributed encapsulated LED light source by two loops.The wiring of every sheet laser passes through Internal Spherical Surface LED light
Source bracket 6 is pooled to 4 in spherical outside surface LED light source bracket connecting tube in the convex surface of interior spherical LED light source bracket 6, from reflective
Rear portion is covered to draw.
According to this embodiment, Internal Spherical Surface LED light source 7 is encapsulated white light LEDs piece.In interior spherical LED light source bracket
By two circle circumferences on 6 concave surface.Outer ring shares 8 LED light source pieces, is uniformly distributed along big circumference.Inner ring has 4
LED light source piece is distributed along middle even circumferential.There is a piece of LED light source piece at the center of interior spherical LED light source bracket 6.
According to this embodiment, the core cell of PLC control device is 45 point PLC, is powered to 37 LED light source pieces
Control.The input terminal of PLC has two class input values, and the first kind is the switching value of manual signal light control executor input, the second class
It is the analog input of Vehicle lighting intensity and luminance sensor input.The voltage and current input terminal of analog quantity is put through operation
Big device connects analog-digital converter, then accesses PLC through input photocoupler.On-off signal signal and analog input signal warp
After PLC program processing, through output resistance and output display LED, is exported by output photoelectric coupling pipe and gives output power triode,
The LED light source of different location and different number on outer, Internal Spherical Surface LED light source bracket is set to be powered.Realize automobile headlight illumination
Full-automatic optimizing regulation.
According to this embodiment, PLC control device is made of following elements: 9 be 45 terminals P LC, and 10 be output display LED
Array shows headlamp lighting state for automobile instrument panel.11 be output photoelectric coupling pipe array, for PLC output end is isolated
With every LED light source piece strong and weak electricity, avoid interfering.12 be output power transistors array, is the electronic cutting of every LED light source piece
It closes.13 be vehicle lamp light source LED array, and 14 be automobile storage battery, and 15 be headlight fuse, and 16 be vehicle lamp light source LED, and 17 be output
Power transistor, 18 be pressure limiting resistance, and 19 be output photoelectric coupling pipe, and 20 be output display LED, and 21 be current-limiting resistance, and 22 are
Simulation input amplifier, 23 be analog input negative terminal, and 24 be analog quantity current input terminal, and 25 be input resistance, and 26 are
Analog quantity voltage input terminal, 27 be input analog-to-digital converter, and 28 be input photocoupler, and 29 be On-off signal switch.
Present example apparatus structure is simple, stable and reliable in work.
Claims (9)
1. a kind of car headlamp automatic regulating system, which is characterized in that it is used in the plurality of LED light source piece being arranged on spherical surface,
LED light source consisting chip arrays, the method combined using reflected light with direct light carry out position and number to LED light source piece with PLC
The combination of amount controls, and realizes the automatic adjustment of automobile headlamp light illumination intensity and lighting position；PLC control device receives lamp
The switching signal of light manipulation switch and the input signal of sensor, in conjunction with ambient enviroment brightness to the lighting position of headlamp and
Intensity automatically adjusts, and realizes the lighting requirement of distance light, dipped beam, Qiang Guang, dim light, left-hand light, dextrad light and combinations thereof；PLC
LED light source piece position is combined and decoded by PLC program realization with the control of quantity；The specific device of this system by reflector,
Spherical outside surface LED light source bracket, spherical outside surface LED light source, spherical outside surface LED light source bracket connecting tube, the connection of Internal Spherical Surface LED light source bracket
Pipe, Internal Spherical Surface LED light source bracket, Internal Spherical Surface LED light source, front lamp cover, PLC control device composition；PLC control device receives light
The switching signal of switch is manipulated, realizes the lighting requirement of distance light, dipped beam, Qiang Guang, dim light, cantankerous light, right strong light and combinations thereof, together
When, the luminosity sensor installed by front side, according to the intensity of illumination of the brightness of ambient enviroment and opposite car light to headlamp
Lighting position and intensity automatically adjust, and power on a certain number of LED light sources of spherical outside surface LED light source different location,
Reflection of the light through reflector illuminates vehicle front road through front lamp cover；After Internal Spherical Surface LED light source is powered, light directly illuminates vapour
Optimization illuminating effect is realized in front side road, the variation of adaptating lighting environment.
2. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that reflector is elliposoidal shell
The a part in body surface face is a thin walled shell part, and inner surface plates reflective membrane, when LED light source electrified light emitting, source light warp
After reflector reflection, projected to vehicle front.
3. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that spherical outside surface LED light source branch
Frame is a hemisphere face thin walled shell part, and installation is arranged by three loops on its outer surface, circumferentially equally distributed through sealing
The wiring of the LED light source piece of dress, every sheet laser passes through spherical outside surface LED light source bracket, in outer spherical LED light source bracket concave surface
It is pooled in spherical outside surface LED light source bracket connecting tube, is drawn from reflector rear portion.
4. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that spherical outside surface LED light source is
Encapsulated white light LEDs piece, by three circle circumferences in outer spherical LED light source bracket convex surface, outer ring shares 10 LED
Light source piece, is uniformly distributed along big circumference, and centre circle has 8 LED light source pieces, is distributed along middle even circumferential, and inner ring has 6 LED light sources
Piece is uniformly distributed along small circumference.
5. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that spherical outside surface LED light source branch
Frame connecting tube is a tubular member, to support spherical outside surface LED light source bracket, and by spherical outside surface LED light source bracket with it is reflective
Cover connects, and the wiring of spherical outside surface LED light source is drawn out of lamp body by spherical outside surface LED light source bracket connecting tube.
6. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that Internal Spherical Surface LED light source branch
Frame connecting tube is a tubular member, to support Internal Spherical Surface LED light source bracket, and by Internal Spherical Surface LED light source bracket with it is reflective
Cover connects, and the wiring of Internal Spherical Surface LED light source is drawn out of lamp body by Internal Spherical Surface LED light source bracket connecting tube.
7. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that Internal Spherical Surface LED light source branch
Frame is a hemisphere face thin walled shell part, and installation is arranged circumferentially equally distributed through sealing by two loops on its inner surface
The wiring of the LED light source of dress, every sheet laser passes through Internal Spherical Surface LED light source bracket, converges in interior spherical LED light source bracket convex surface
Collect in spherical outside surface LED light source bracket connecting tube, is drawn from reflector rear portion.
8. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that Internal Spherical Surface LED light source is
Encapsulated white light LEDs piece, by two circle circumferences on interior spherical LED light source bracket concave surface, outer ring shares 8 LED
Light source piece, is uniformly distributed along big circumference, and inner ring has 4 LED light source pieces, is distributed along middle even circumferential, in interior spherical LED light source branch
There is a piece of LED light source piece at frame center.
9. a kind of car headlamp automatic regulating system as described in claim 1, which is characterized in that the core of PLC control device
Heart unit is 45 point PLC, carries out power control to 37 LED light source pieces；PLC control device is made of following elements: 45 terminals
PLC, output display LED array, shows headlamp lighting state for automobile instrument panel；Output photoelectric couple pipe array, be used to every
From PLC output end and every LED light source piece strong and weak electricity, avoid interfering；Output power transistors array is every LED light source piece
Electronic switch；Vehicle lamp light source LED array, automobile storage battery, headlamp fuse, pressure limiting resistance, current-limiting resistance, simulation input
Amplifier, analog input negative terminal, analog quantity current input terminal, input resistance, analog quantity voltage input terminal input mould
Number converter inputs photocoupler, On-off signal switch；The input terminal of PLC has two class input values, and the first kind is manual
The switching value of signal light control executor input, the second class are the analog inputs of Vehicle lighting intensity and luminance sensor input；
The voltage and current input terminal of analog quantity connects analog-digital converter through operational amplifier, then accesses PLC through input photocoupler；
On-off signal signal and analog input signal are after PLC program is handled, through output resistance and output display LED, by defeated
Photocoupler, which exports, out gives output power triode, makes outer, different location and different number on Internal Spherical Surface LED light source bracket
LED light source is powered, and realizes the full-automatic optimizing regulation of automobile headlight illumination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610803518.8A CN106427764B (en) | 2016-08-29 | 2016-08-29 | A kind of car headlamp automatic regulating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610803518.8A CN106427764B (en) | 2016-08-29 | 2016-08-29 | A kind of car headlamp automatic regulating system |
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| CN106427764B true CN106427764B (en) | 2018-12-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102043063B1 (en) * | 2017-12-05 | 2019-11-11 | 엘지전자 주식회사 | Lamp for vehicle and vehicle |
| CN109818406A (en) * | 2019-03-14 | 2019-05-28 | 宁波英泰克照明有限公司 | A kind of new type solar energy lighting system |
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| US20100148672A1 (en) * | 2008-12-11 | 2010-06-17 | Michael Blair Hopper | Energy Efficient Lighting System and Method |
| CN202402982U (en) * | 2011-12-04 | 2012-08-29 | 西安金诺光电科技有限公司 | LED (Light-Emitting Diode) lamp for deflected lighting |
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Effective date of registration: 20181108 Address after: 201799 floor 5, C building, 333 National Convention and Exhibition Center, song Ze Avenue, Qingpu District, Shanghai. Applicant after: Weimar Automobile Technology Group Co.,Ltd. Address before: 510640 2401, unit 371-1, Zhong Gong education building, five mountain road, Tianhe District, Guangzhou, Guangdong. Applicant before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20181108 Address after: 510640 2401, unit 371-1, Zhong Gong education building, five mountain road, Tianhe District, Guangzhou, Guangdong. Applicant after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 510665 293 Zhongshan Avenue, Tianhe District, Guangzhou, Guangdong. Applicant before: GUANGDONG POLYTECHNIC NORMAL University |
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