CN106871039A - LED vehicle head lamps - Google Patents
LED vehicle head lamps Download PDFInfo
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- CN106871039A CN106871039A CN201710056228.6A CN201710056228A CN106871039A CN 106871039 A CN106871039 A CN 106871039A CN 201710056228 A CN201710056228 A CN 201710056228A CN 106871039 A CN106871039 A CN 106871039A
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- Prior art keywords
- light source
- led light
- substrate
- radiator
- led
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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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
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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
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
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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)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a kind of LED vehicle head lamps, including：First substrate and second substrate, the first substrate have an A faces, and the second substrate has B faces and symmetrical with the A faces of first substrate and dorsad set；LED light source, it includes word order in first LED light source and the second LED light source in first substrate A faces, word order is in the 3rd LED light source and the 4th LED light source in second substrate B faces, first LED light source is oppositely arranged with the 3rd LED light source, and second LED light source is oppositely arranged with the 4th LED light source；A pair of filament shields, the B faces in its relative respectively A face and second substrate for being arranged at first substrate, and bowl structure is monolithically fabricated, first LED light source is located on A faces at the bowl plane of filament shield, and the 3rd LED light source is located on B faces at the bowl plane of filament shield.The present invention has and solves the problems, such as that long-and-short distant light "cut-off"line is unintelligible, dazzle.
Description
Technical field
The present invention relates to car light field.It is more particularly related to a kind of LED vehicle head lamps.
Background technology
Headlamp light source is the key components and parts on vehicle, and is unified standard parts and components.GB15766 GBs, IEC-
60809th, R37 European standards have standard to require the specifications and models of product.Existing headlamp uses filament bulb,
Filament bulb has the following disadvantages：1st, filament bulb is because tungsten filament is very carefully, it is necessary to tungsten filament is welded on the support in lamp body, weldering
Connect and easily cause filament damage, when being influenceed by external force, filament is easily deformed, and headlamp belongs to spot light, to luminous point
Physical dimension requirement it is very high, filament deformation after, the light shape that lamp sends just generates change, changes optical property；2nd, due to car
The fluctuation of output voltage, tungsten filament is again very thin, is easily broken off, and causes failure；3rd, filament bulb is glass shell, easily broken
It is broken.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of LED vehicle head lamps, LED light source and cavity between is rationally set
Relative position, "cut-off"line is unintelligible, dazzle problem to overcome long-and-short distant light.
It is a still further object of the present invention to provide a kind of LED vehicle head lamps, the radiator of ad hoc structure, and lamp are set
After seat is fixed, integral structure is realized, facilitate the replacing of car light.
In order to realize these purposes of the invention and further advantage, there is provided a kind of LED vehicle head lamps, including：
First substrate and second substrate, the first substrate have an A faces, the second substrate have B faces and with the first base
The A faces of plate are symmetrical and dorsad set；
LED light source, it includes word order in first LED light source and the second LED light source in first substrate A faces, word row
It is listed in the 3rd LED light source and the 4th LED light source in second substrate B faces, first LED light source and the 3rd LED light source phase
To setting, second LED light source is oppositely arranged with the 4th LED light source；
A pair of filament shields, the B faces in its relative respectively A face and second substrate for being arranged at first substrate, and be monolithically fabricated
Bowl structure, first LED light source is located on A faces at the bowl plane of filament shield, and the 3rd LED light source is located on B faces matches somebody with somebody
At the bowl plane of optical screen.
Preferably, first LED light source, the second LED light source, the 3rd LED light source and the 4th LED light source light-emitting area are equal
It is 2~8.5mm long, the rectangle of 1~4mm wide；
The A faces of the first substrate have a rectangle like region, a length of 16mm in the rectangle like region, a width of 8mm,
First LED light source and second LED light source are arranged at intervals at the class along the length direction in the rectangle like region
In rectangular region, first LED light source and second LED light source spacing along its length are 0.5~2.8mm；
The B faces of the second substrate have a rectangle like region, a length of 16mm in the rectangle like region, a width of 8mm,
3rd LED light source and the 4th LED light source are arranged at intervals at the class along the length direction in the rectangle like region
In rectangular region, the 3rd LED light source and the 4th LED light source spacing along its length are 0.5~2.8mm.
Preferably, the LED light source is cob light sources.
Preferably, also including radiator and driving power supply；
Two faces that the middle part of the radiator is relative offer the first cell body and the second cell body respectively；The radiator
Side is caved inward to form accommodating cavity, and the accommodating cavity is connected with first cell body and the second cell body；The first substrate
It is fixed in first cell body, and LED light source on the first substrate protrudes from first cell body；The second substrate
It is fixed in second cell body, and LED light source on the second substrate protrudes from second cell body；
LED drive power, it is arranged in the accommodating cavity, and the LED drive power is by connection terminal and described the
LED light source connection corresponding to one substrate and second substrate, powers with to LED light source.
Preferably, the radiator include positioned at opposite side Part I, its be column structure, the radiator
Middle part is class rectangular structure, the external diameter of the interior thickness less than the radiator Part I of the radiator, the radiating
The middle part of device is connected with the Part I of the radiator by concave profile.
Preferably, also including lamp socket, its side for being socketed on the radiator.
Preferably, the middle part length of the radiator and the length ratio of the Part I of the radiator are 2~4:1,
The interior thickness of the radiator is 1 with the external diameter ratio of the Part I of the radiator:3~5.
Preferably, the radiator includes the component of following parts by weight：
50-60 parts of AL, 20-30 part of AlB12, 8-10 parts of tin oxide, 5-8 parts of carbon steel, 0.5~0.8 part of palladium, 3-5 parts of point it is brilliant
Stone and 3-5 parts of Ni；
The preparation method of the radiator material is：Said components are placed in high temperature melting furnace, raising furnace body temperature is
500-520 DEG C, melting 2~2.5 hours, melting carries out annealing cooling again after terminating, and obtains final product radiator material.
Preferably, the surface in the middle part of the radiator is provided with insulating barrier, and thickness is 2-3mm；
The insulating barrier is made up of following raw material, counts by weight：100 parts of carborundum, 20~25 parts of binding agent, clay
20-25 parts and 8~12 parts of aluminum oxide.
Preferably, it is set to alveolate texture in the middle part of the radiator.
The present invention at least includes following beneficial effect：
1st, the LED vehicle head lamps of the application use integral structure, and radiator and base are metal shells, will not be gone out
The phenomenon of filament bulb glass breaking is now similar to, also in the absence of being influenceed luminous point change occur by external force, causes luminous intensity distribution performance
Change, it is also possible to bear the fluctuation of vehicle output voltage, be not in filament breaking and cause the phenomenon of lamp failure.
2nd, the upper beam efficiency of filament bulb is usually 20lm/w or so, and the LED vehicle head lamp light efficiencies of the application
100lm/w or so is usually, illumination is the basic load of vehicle electricity consumption, and the LED vehicle head lamps of the application are filament bulb
5 times of upper beam efficiency, significantly reduce vehicle electric loading, improve the performance of vehicle.
3rd, the LED vehicle head lamp long lifespans of the application, after testing, the LED vehicle head lamp life-spans of the application reach
More than 10000 hours, and the upper beam average life span of filament bulb is 500 hours.
4th, it is very high to environment temperature requirement because LED light source is cold light source, it is glimmering when LED light source operating temperature is higher than 60 DEG C
Light powder is easily aging, light decay occurs, causes impaired performance.Therefore, the application radiator is made of special heat sink material, tool
There is excellent thermal conductivity, on the premise of long-and-short distant light illumination is not influenceed, with reference to first substrate, second substrate and LED light source
Position Design goes out the radiator of ad hoc structure, can quickly spread the heat produced when LED light source works, it is ensured that LED light source
Operating ambient temperature.
5th, LED light source use cob light sources, using cob packaging technologies, will state the first LED light source to the 4th LED light source by
According to scope of the present application encapsulation, the illumination patterns requirement that GB is met for that can obtain provides FLAMING DATUM.
6th, lamp socket uses standard universal type, and lamp holder model is respectively P43T, PX43T, BA20D, is led to due to having used
Type lamp socket, LED vehicle head lamps is used to enter without the structure and lamp part to vehicle when vehicle lamp is assembled and replacement is safeguarded
Row is changed.
7th, the position dimension requirement of the distance light of LED vehicle head lamps and dipped beam reference filament bulb, with datum level (GB pair
Datum level has mark) fixation is adjusted to the position dimension of luminous point, its centre of luminescence is 27 --- 34mm scopes it is a certain
Point, can obtain and meet GB5948-1998 headlamp luminous intensity distribution performance requirements.
Further advantage of the invention, target and feature embody part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the overall structure diagram in LED vehicle head lamps first substrate face of the invention；
Fig. 2 is the overall structure diagram in LED vehicle head lamps second substrate face of the invention；
Fig. 3 is the overall structure diagram at the LED vehicle head lamps filament shield back side of the invention；
Fig. 4 is the first LED light source and the second LED light source position point on LED vehicle head lamps first substrate of the invention
Cloth schematic diagram；
Fig. 5 is one of structural representation of filament shield of the present invention；
Fig. 6 is the two of the structural representation of filament shield of the present invention；
Fig. 7 is the overall structure diagram of present invention figure LED vehicle head lamp filament shield opening surfaces；
Fig. 8 is the circuit theory diagrams of driving power supply；
Fig. 9 is the one side of driving power supply pcb board；
Figure 10 is the another side of driving power supply pcb board；
Figure 11 is the pin position schematic diagram of IC chip.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
In the description of the invention, term " transverse direction ", " longitudinal direction ", " on ", it is D score, "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom ", " interior ", " outward " are based on orientation shown in the drawings or position
Relation is put, the description present invention is for only for ease of and is simplified description, be not to indicate or imply that the device or element of meaning are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
As shown in Fig. 1~7, the present invention provides a kind of LED vehicle head lamps, including：
First substrate 11 and second substrate 12, the first substrate 11 have A faces, the second substrate 12 have B faces and
It is symmetrical with the A faces of first substrate 11 and dorsad set；
LED light source, it includes word order in first LED light source 21 in the A faces of first substrate 11 and the second LED light source
22, word order is in the 3rd LED light source 23 and the 4th LED light source 24 in the B faces of second substrate 12, first LED light source 21
It is oppositely arranged with the 3rd LED light source 23, second LED light source 22 is oppositely arranged with the 4th LED light source 24；
A pair of filament shields, the B faces in its relative respectively A face and second substrate 12 for being arranged at first substrate 11, and it is overall
Bowl structure (as shown in fig. 7, a pair of entirety of filament shield are in bowl structure) is constituted, first LED light source 21 is located on A faces
At the bowl plane of filament shield 31, the 3rd LED light source 23 is located on B faces at the bowl plane of filament shield 32, and preferably first
In bowl plane, 2/3rds outside bowl plane for 1/3rd of LED light source 21.It should be noted that the setting of filament shield according to
Filament shield is set according to the standard requirement of filament bulb and structural principle, the optical property standard of headlamp can be met.
In the above-mentioned technical solutions, the first LED light source 21 and the 3rd LED light source 23 combine filament shield as dipped headlight,
Second LED light source 22 and the 4th LED light source 24 are used as high beam.
In another technical scheme, first LED light source 21, the second LED light source 22, the 3rd LED light source 23 and
The light-emitting area of four LED light source 24 is 2~8.5mm long, the rectangle of 1~4mm wide；
The A faces of the first substrate 11 have a rectangle like region, a length of 16mm in the rectangle like region, a width of
8mm, first LED light source 21 and second LED light source 22 along the rectangle like region length direction interval setting
In in the rectangle like region, first LED light source 21 and second LED light source 22 spacing along its length are
0.5~2.8mm；
The B faces of the second substrate 12 have a rectangle like region, a length of 16mm in the rectangle like region, a width of
8mm, the 3rd LED light source 23 and the 4th LED light source 24 along the rectangle like region length direction interval setting
In in the rectangle like region, the 3rd LED light source 23 and the 4th LED light source 24 spacing along its length are
0.5~2.8mm.
In the above-mentioned technical solutions, by taking the A faces of first substrate 11 as an example, the first LED light source 21 and the second LED light source 22 can
It is arranged at any position in rectangle like region, it is only necessary to meet above-mentioned the first LED light source 21 and the second LED light source 22 along length
The spacing for spending direction is maintained at 0.5~2.8mm.Above-mentioned zone position relationship is set mainly solving the technical problems that distance light
Light disperses, the "cut-off"line of dipped beam requirement is unintelligible, dazzle problem.Before according to this region, the LED of LED light source is set
The one of which embodiment of illuminator has done distance-light performance test, and free from glare problem, distance light light is gathered, and other the results are shown in Table 1.
After one group of data of any of which exceed above-mentioned zone, the performance test results not meeting property preliminary judgement, and dipped beam dead line
Also it is unintelligible, it may appear that glare problem.
In another technical scheme, the LED light source is cob light sources, and LED light source uses cob light sources, using cob
Packaging technology, will state the LED light source 24 of the first LED light source 21 to the 4th and is encapsulated according to scope of the present application, be that can obtain to meet state
The requirement of target illumination patterns provides FLAMING DATUM.
In another technical scheme, also including radiator 4 and driving power supply；
Two faces that the middle part 42 of the radiator 4 is relative offer the first cell body and the second cell body respectively；The radiating
The side 41 of device 4 is caved inward to form accommodating cavity, and the accommodating cavity is connected with first cell body and the second cell body, convenient to drive
Dynamic power supply and the LED light source being arranged on the first cell body and the second cell body are connected with driving power supply.The first substrate 11 is fixed
First cell body is protruded from the LED light source in first cell body, and on the first substrate 11；The second substrate 12
It is fixed in second cell body, and LED light source on the second substrate 12 protrudes from second cell body；
LED drive power, it is arranged in the accommodating cavity, and the LED drive power is by connection terminal and described the
LED light source connection corresponding to one substrate 11 and second substrate 12, powers with to LED light source.Specially：LED drive power and
First substrate 11 and the corresponding distance light of second substrate 12, the negative pole of dipped headlight, the public positive pole of distance light, dipped beam pass through connection end
Son conducting.The LED drive power for being used, and the connection of LED drive power and LED light source is prior art, herein
Repeat no more.
In the above-mentioned technical solutions, by the transformation to the structure of radiator 4, LED vehicle head lamps are made to realize integral type
Structure, is convenient for changing, and is fitted by with radiator 4 in first substrate 11 and the relative face of second substrate 12, greatly improves
Radiating effect, and first substrate 11 and second substrate 12 are embedded at the first cell body and the second cell body, are influenceed in the absence of by external force
Existing luminous point change, causes the change of luminous intensity distribution performance.
In another technical scheme, as shown in figure 5, the radiator 4 include positioned at opposite side Part I 43, its
It is column structure, the middle part of the radiator 4 is class rectangular structure, and the interior thickness of the radiator 4 is less than the radiating
The external diameter of the Part I of device 4, the middle part of the radiator 4 is connected with the Part I of the radiator 4 by concave profile.
In the above-mentioned technical solutions, when being higher than 60 DEG C due to LED operation temperature, easily aging there is light decay, property in fluorescent material
Can weaken, when the Part I of radiator 4 and the middle part of radiator 4 are connected the face that can increase radiator 4 using concave profile
Product, improves radiating effect.
In another technical scheme, also including lamp socket 5, its side for being socketed on the radiator 4.
In the above-mentioned technical solutions, the selection standard of lamp socket 5 is universal, and lamp holder model is respectively P43T, PX43T, BA20D
Deng, lamp socket 5 in the assembling process of LED vehicle head lamps, with reference to the performance requirement of filament bulb, to the position dimension of luminous point
Physical dimension adjustment assembly with lamp is fixed, and during follow-up test, the LED vehicle head lamps of the application meet headlamp
Luminous intensity distribution performance standard.
In another technical scheme, as shown in fig. 6, the middle part length of the radiator 4 and the first of the radiator 4
Partial length ratio is 2~4:1, the interior thickness of the radiator 4 is 1 with the external diameter ratio of the Part I of the radiator 4:
3~5.In the above-mentioned technical solutions, the length and thickness of Part I within the range when, both ensure that the entirety of radiator 4
Size is being adapted in scope, it is to avoid the quality of radiator 4 is too heavy, and the position that the influence later stage installs back light easily offsets, while
Improve radiating effect.
In another technical scheme, the radiator includes the component of following parts by weight：
50-60 parts of AL, 20-30 part of AlB12, 8-10 parts of tin oxide, 5-8 parts of carbon steel, 0.5~0.8 part of palladium, 3-5 parts of point it is brilliant
Stone and 3-5 parts of Ni；
The preparation method of the radiator material is：Said components are placed in high temperature melting furnace, raising furnace body temperature is
500-520 DEG C, melting 2~2.5 hours, melting carries out annealing cooling again after terminating, and obtains final product radiator material.
In another technical scheme, the surface in the middle part of the radiator is provided with insulating barrier, and thickness is 2-3mm；
The insulating barrier is made up of following raw material, counts by weight：100 parts of carborundum, 20~25 parts of binding agent, clay
20-25 parts and 8~12 parts of aluminum oxide.
In the above-mentioned technical solutions, after insulating barrier is set, first substrate and second substrate are fixed on insulating barrier, before LED
The heat of illuminator passes to radiator by insulating barrier.
In another technical scheme, alveolate texture is set in the middle part of the radiator, it is internal structure, in table
After face sets insulating barrier, do not influence to use, middle part is set into alveolate texture has more preferable radiating effect.
Embodiment 1
Radiator is made according to the material of the application, the radiator is made up of the component of following parts by weight：
50 parts of AL, 20 parts of AlB12, 8 parts of tin oxide, 5 parts of carbon steels, 0.5 part of palladium, 3 parts of spinelles and 3 parts of Ni.
The preparation method of the radiator material is：Said components are placed in high temperature melting furnace, raising furnace body temperature is
500 DEG C, melting 2 hours, melting carries out annealing cooling again after terminating, and obtains final product radiator material.
Surface in the middle part of the radiator is provided with insulating barrier, and thickness is 2mm.
The insulating barrier is made up of following raw material, counts by weight：100 parts of carborundum, 20 parts of binding agent, 20 parts of clay
With 8 parts of aluminum oxide.
Embodiment 2
It makes radiator according to the standard of embodiment 1, and cellular knot is set in the middle part of the radiator that do not exist together uniquely
Structure.
Control group 3
Its heat sink size for making and shape are same as Example 1, and the material of selection is aluminium that thermal conductivity factor is 3.0
It is made.
Experiment：The radiator that embodiment 1~2, control group 3 are made is both heated to 90 DEG C, afterwards three radiators is put
In size identical thermostat, the temperature of thermostat is 25 DEG C, and through measurement, the radiator of embodiment 1 is cooled to by 90 DEG C
25 DEG C need 184 seconds, the radiator of embodiment 2 by 90 DEG C be cooled to 25 DEG C need 168 seconds, the radiator of control group 3 is by 90 DEG C
Being cooled to 25 DEG C needs 236 seconds, it follows that the radiator material and structure of the application can significantly improve radiating effect.
Table 1LED headlamps match somebody with somebody optical tests
Dipped beam "cut-off"line state：Dipped beam dead line is clear
Illumination (unit of the far/dipped beam on photometric screen：Lx)
Note：Accordance preliminary judgement：√ is represented and met；× expression does not meet.
Test basis：GB 5948-1998
In addition, the application is LED vehicle head lamps is adapted to different types of vehicle, such as battery truck, truck, small sedan-chair
Car etc., is improved its driving power supply, is made using electric capacity, resistance, diode, constant-current source, inductance, IC chip etc. integrated
Controller, the driving power supply realizes LED vehicle head lamps can be in the voltage range normal work of 9-80V, and to distance light and near
Light overcurrent is separately controlled, reach distance light it is bright when dipped beam do not work, distance light does not work when dipped beam is bright, and electric current stabilization.It is illustrated in figure 8
The schematic diagram of driving power supply, LED vehicle head lamps far light and near light separates bright operation principle：
When HV is powered, HV-N-MOS pipes are opened, while power supply is powered by D1 to constant current IC.(LV is isolated by diode D2,
LV no-voltages herein, what LV-N-MOS pipes were closed)；
When LV is powered, LV-N-MOS pipes are opened, while power supply is powered by D2 to constant current IC.(HV is isolated by diode D1,
HV no-voltages herein, what HV-N-MOS pipes were closed)；
Step-down constant current principle：(material of selection is supported to 80V)；
Switching Power Supply principle (detection circuit controlled output switching frequency (200KHZ) come control internal N-MOS pipes open and
Close, outer to connect cut-off current controlled output size of current along with inductance charge-discharge principle reaches a constant current state)；
Power supply is powered (IC is internally integrated voltage-stabiliser tube) by R1 to IC, it is necessary to is connect a capacitor filtering, is done interference；
When built-in metal-oxide-semiconductor is opened, power supply is by LED+ ..., and LED- ... inductance L (induction charging) ... returns to IC5 pin
(built-in N-MOS D poles, internal feedback detection) passes through R3Resistance current limliting is over the ground.
When built-in metal-oxide-semiconductor is closed, inductive discharge depends on D3 continuous current discharge electricities (L ... D3... LED+ ... LED- return to L).
PCB design of the invention as shown in figs. 9-10, all uses surface mount elements.
As shown in figure 11, high efficiency, voltage-dropping type, the constant-current LED of internal high-voltage MOSFET drive electricity to IC chip of the invention
Road.Using the peak current detection pattern of fixed turn-off time, maximum output voltage is up to 100V.Chip includes that a PWM is adjusted
Light pin, can realize dimming function by the pwm signal of additional 0-100% dutycycles or 0-1.2V DC potentials.Chip is also
Including a temperature-compensating pin, a sample resistance and thermistor are connect respectively by with the indirect of benchmark pin VREF and GND
To realize temperature compensation function, can be set in reduces more than output current after certain temperature with the rising of temperature.LN2544
The ability of output current is adjusted by setting outer samples resistance.Highest output current is up to 1A.Sealed using MSOP-8/PP
Dress.Ensure chip volume while small with certain heat-sinking capability.(fin is built-in to meet DRAIN).
Table 2
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and implementation method
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (10)
1. a kind of LED vehicle head lamps, it is characterised in that including：
First substrate and second substrate, the first substrate have an A faces, the second substrate have B faces and with first substrate
A faces are symmetrical and dorsad set；
LED light source, it includes word order in first LED light source and the second LED light source in first substrate A faces, word order in
3rd LED light source and the 4th LED light source in second substrate B faces, first LED light source is relative with the 3rd LED light source to be set
Put, second LED light source is oppositely arranged with the 4th LED light source；
A pair of filament shields, the B faces in its relative respectively A face and second substrate for being arranged at first substrate, and be monolithically fabricated bowl-shape
Structure, first LED light source is located on A faces at the bowl plane of filament shield, and the 3rd LED light source is located at filament shield on B faces
Bowl plane at.
2. LED vehicle head lamps as claimed in claim 1, it is characterised in that first LED light source, the second LED light source,
3rd LED light source and the 4th LED light source light-emitting area are 2~8.5mm long, the rectangle of 1~4mm wide；
The A faces of the first substrate have rectangle like region, and a length of 16mm in the rectangle like region, a width of 8mm are described
It is rectangular that first LED light source and second LED light source are arranged at intervals at the class along the length direction in the rectangle like region
In shape region, first LED light source and second LED light source spacing along its length are 0.5~2.8mm；
The B faces of the second substrate have rectangle like region, and a length of 16mm in the rectangle like region, a width of 8mm are described
It is rectangular that 3rd LED light source and the 4th LED light source are arranged at intervals at the class along the length direction in the rectangle like region
In shape region, the 3rd LED light source and the 4th LED light source spacing along its length are 0.5~2.8mm.
3. LED vehicle head lamps as claimed in claim 2, it is characterised in that the LED light source is cob light sources.
4. LED vehicle head lamps as claimed in claim 2, it is characterised in that also including radiator and driving power supply；
Two faces that the middle part of the radiator is relative offer the first cell body and the second cell body respectively；The side of the radiator
Cave inward to form accommodating cavity, the accommodating cavity is connected with first cell body and the second cell body；The first substrate is fixed
First cell body is protruded from the LED light source in first cell body, and on the first substrate；The second substrate is fixed
Second cell body is protruded from the LED light source in second cell body, and on the second substrate；
LED drive power, it is arranged in the accommodating cavity, and the LED drive power passes through connection terminal and first base
LED light source connection corresponding to plate and second substrate, powers with to LED light source.
5. LED vehicle head lamps as claimed in claim 4, it is characterised in that the radiator includes the positioned at opposite side
A part, its be column structure, the middle part of the radiator is class rectangular structure, and the interior thickness of the radiator is less than institute
The external diameter of radiator Part I is stated, the middle part of the radiator is held in the mouth with the Part I of the radiator by concave profile
Connect.
6. LED vehicle head lamps as claimed in claim 4, it is characterised in that also including lamp socket, it is socketed on the radiator
Side.
7. LED vehicle head lamps as claimed in claim 5, it is characterised in that the middle part length of the radiator dissipates with described
The length ratio of the Part I of hot device is 2~4:1, the interior thickness of the radiator is outer with the Part I of the radiator
Footpath ratio is 1:3~5.
8. LED vehicle head lamps as claimed in claim 5, it is characterised in that the radiator includes following parts by weight
Component：
50-60 parts of AL, 20-30 part of AlB12, 8-10 parts of tin oxide, 5-8 parts of carbon steel, 0.5~0.8 part of palladium, 3-5 parts of spinelle, with
And 3-5 parts of Ni；
The preparation method of the radiator material is：Said components are placed in high temperature melting furnace, rising furnace body temperature is 500-
520 DEG C, melting 2~2.5 hours, melting carries out annealing cooling again after terminating, and obtains final product radiator material.
9. LED vehicle head lamps as claimed in claim 8, it is characterised in that the surface in the middle part of the radiator is provided with absolutely
Edge layer, thickness is 2-3mm；
The insulating barrier is made up of following raw material, counts by weight：100 parts of carborundum, 20~25 parts of binding agent, clay 20-
25 parts and 8~12 parts of aluminum oxide.
10. LED vehicle head lamps as claimed in claim 9, it is characterised in that be set in the middle part of the radiator cellular
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056228.6A CN106871039B (en) | 2017-01-26 | 2017-01-26 | LED vehicle headlamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710056228.6A CN106871039B (en) | 2017-01-26 | 2017-01-26 | LED vehicle headlamp |
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| Publication Number | Publication Date |
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| CN106871039A true CN106871039A (en) | 2017-06-20 |
| CN106871039B CN106871039B (en) | 2020-06-19 |
Family
ID=59159048
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710056228.6A Active CN106871039B (en) | 2017-01-26 | 2017-01-26 | LED vehicle headlamp |
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| Country | Link |
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| CN (1) | CN106871039B (en) |
Cited By (1)
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|---|---|---|---|---|
| CN108758544A (en) * | 2018-07-13 | 2018-11-06 | 常州拓晶照明科技有限公司 | Automobile-used 360 ° of light emitting LED lamps |
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| Publication number | Publication date |
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| CN106871039B (en) | 2020-06-19 |
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