CN106871039B - LED vehicle headlamp - Google Patents
LED vehicle headlamp Download PDFInfo
- Publication number
- CN106871039B CN106871039B CN201710056228.6A CN201710056228A CN106871039B CN 106871039 B CN106871039 B CN 106871039B CN 201710056228 A CN201710056228 A CN 201710056228A CN 106871039 B CN106871039 B CN 106871039B
- Authority
- CN
- China
- Prior art keywords
- light source
- led light
- substrate
- led
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- 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
-
- 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
-
- 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 an LED vehicle headlamp, comprising: the substrate comprises a first substrate and a second substrate, wherein the first substrate is provided with an A surface, and the second substrate is provided with a B surface, is symmetrical to the A surface of the first substrate and is arranged in a back direction; the LED light source comprises a first LED light source and a second LED light source which are arranged in a straight line on the surface A of a first substrate, a third LED light source and a fourth LED light source which are arranged in a straight line on the surface B of a second substrate, wherein the first LED light source and the third LED light source are arranged oppositely, and the second LED light source and the fourth LED light source are arranged oppositely; the pair of light distribution screens are respectively and oppositely arranged on the surface A of the first substrate and the surface B of the second substrate and integrally form a bowl-shaped structure, the first LED light source is positioned on the bowl plane of the light distribution screen on the surface A, and the third LED light source is positioned on the bowl plane of the light distribution screen on the surface B. The invention solves the problems of unclear cut-off line of the far and near light and glare.
Description
Technical Field
The present invention relates to the field of vehicle lamps. More particularly, the present invention relates to an LED vehicle headlamp.
Background
The headlamp light source is a key part on the vehicle and is a unified standard part. GB15766 national standard, IEC-60809 and R37 European standard all have standard requirements on the specification and model of products. The existing head lamps all adopt filament bulbs, and the filament bulbs have the following defects: 1. the filament bulb has the advantages that the tungsten filament is thin, the tungsten filament needs to be welded on the support in the lamp body, the welding easily causes damage to the filament, the filament is easy to deform when being influenced by external force, the headlamp belongs to a point light source, the requirement on the geometric dimension of a light emitting point is high, after the filament deforms, the light shape emitted by the lamp changes, and the light performance is changed; 2. due to the fluctuation of the output voltage of the vehicle, the tungsten wire is thin and easy to break, so that the failure is caused; 3. the filament bulb is provided with a glass shell which is easy to break.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
Still another object of the present invention is to provide an LED vehicle headlamp, which can reasonably set the relative position between the LED light source and the base, so that the high beam and the low beam can overcome the problems of unclear cut-off line and glare.
The invention also aims to provide the LED vehicle headlamp, which is provided with the radiator with a specific structure, and the radiator is fixed with the lamp holder to realize an integrated structure, so that the vehicle lamp is convenient to replace.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an LED vehicle headlamp including:
the substrate comprises a first substrate and a second substrate, wherein the first substrate is provided with an A surface, and the second substrate is provided with a B surface, is symmetrical to the A surface of the first substrate and is arranged in a back direction;
the LED light source comprises a first LED light source and a second LED light source which are arranged in a straight line on the surface A of a first substrate, a third LED light source and a fourth LED light source which are arranged in a straight line on the surface B of a second substrate, wherein the first LED light source and the third LED light source are arranged oppositely, and the second LED light source and the fourth LED light source are arranged oppositely;
the pair of light distribution screens are respectively and oppositely arranged on the surface A of the first substrate and the surface B of the second substrate and integrally form a bowl-shaped structure, the first LED light source is positioned on the bowl plane of the light distribution screen on the surface A, and the third LED light source is positioned on the bowl plane of the light distribution screen on the surface B.
Preferably, the light emitting surfaces of the first LED light source, the second LED light source, the third LED light source and the fourth LED light source are all rectangular with the length of 2-8.5 mm and the width of 1-4 mm;
the surface A of the first substrate is provided with a similar rectangular area, the length of the similar rectangular area is 16mm, the width of the similar rectangular area is 8mm, the first LED light source and the second LED light source are arranged in the similar rectangular area at intervals along the length direction of the similar rectangular area, and the distance between the first LED light source and the second LED light source along the length direction is 0.5-2.8 mm;
the B side of second base plate has the class rectangle region, the regional length of class rectangle is 16mm, wide 8mm, the third LED light source with the fourth LED light source is followed the regional length direction interval of class rectangle set up in the class rectangle region, the third LED light source with the fourth LED light source is 0.5 ~ 2.8mm along length direction's interval.
Preferably, the LED light source is a cob light source.
Preferably, the device also comprises a radiator and a driving power supply;
two opposite surfaces in the middle of the radiator are respectively provided with a first groove body and a second groove body; one side of the radiator is inwards sunken to form an accommodating cavity, and the accommodating cavity is communicated with the first groove body and the second groove body; the first substrate is fixed in the first groove body, and the LED light source on the first substrate protrudes out of the first groove body; the second substrate is fixed in the second groove body, and the LED light source on the second substrate protrudes out of the second groove body;
and the LED driving power supply is arranged in the accommodating cavity and is connected with the LED light sources corresponding to the first substrate and the second substrate through the connecting terminals so as to supply power to the LED light sources.
Preferably, the radiator is including the first portion that is located the opposite side, it is the columnar structure, the middle part of radiator is class cuboid structure, the middle part thickness of radiator is less than the external diameter of the first portion of radiator, the middle part of radiator with the first portion of radiator links up through interior arcwall face.
Preferably, the lamp further comprises a lamp holder sleeved on one side of the heat sink.
Preferably, the ratio of the length of the middle part of the radiator to the length of the first part of the radiator is 2-4: 1, and the ratio of the thickness of the middle part of the radiator to the outer diameter of the first part of the radiator is 1: 3-5.
Preferably, the radiator comprises the following components in parts by weight:
50-60 parts of AL and 20-30 parts of AlB128-10 parts of tin oxide, 5-8 parts of carbon steel, 0.5-0.8 part of palladium, 3-5 parts of spinel and 3-5 parts of Ni;
the preparation method of the radiator material comprises the following steps: and (3) placing the components in a high-temperature smelting furnace, raising the temperature of the furnace body to 520 ℃, smelting for 2-2.5 hours, and then annealing and cooling after smelting to obtain the radiator material.
Preferably, the surface of the middle part of the radiator is provided with an insulating layer, and the thickness of the insulating layer is 2-3 mm;
the insulating layer is prepared from the following raw materials in parts by weight: 100 parts of silicon carbide, 20-25 parts of binder, 20-25 parts of clay and 8-12 parts of alumina.
Preferably, the middle portion of the heat sink is provided with a honeycomb structure.
The invention at least comprises the following beneficial effects:
1. the LED vehicle headlamp of the application adopts an integrated structure, the radiator and the base are metal outer bodies, the phenomenon that similar filament bulb glass is broken can not occur, the change of light-emitting points caused by the influence of external force can not occur, the change of light distribution performance can be caused, the fluctuation of vehicle output voltage can be borne, and the phenomenon that a lamp fails due to the fact that a filament is broken can not occur.
2. The head-light luminous efficiency of filament bulb is about 20lm/w usually, and the LED vehicle headlamps light efficiency of this application has usually been about 100lm/w, and the illumination is the main load of vehicle electricity, and the LED vehicle headlamps of this application is 5 times of filament bulb head-light luminous efficiency, has alleviateed vehicle electricity load greatly, has improved the performance of vehicle.
3. The LED vehicle headlamp of this application is longe-lived, through detecting, the LED vehicle headlamp life-span of this application all reaches more than 10000 hours, and the head-light life-average of filament bulb is 500 hours.
4. Because the LED light source is a cold light source, the requirement on the environment temperature is high, and when the working temperature of the LED light source is higher than 60 ℃, the fluorescent powder is easy to age, and the performance is weakened due to the light attenuation. Therefore, the radiator is made of special radiating materials, has excellent thermal conductivity, and can quickly diffuse heat generated by the LED light source during working and ensure the working environment temperature of the LED light source by combining the first substrate, the second substrate and the LED light source to design the radiator with a specific structure on the premise of not influencing the illumination of the high beam and the low beam.
5. The LED light sources are all cob light sources, and the first LED light source to the fourth LED light source are packaged according to the range of the application by using a cob packaging process, so that a light-emitting base point is provided for obtaining the illumination distribution requirement meeting the national standard.
6. The lamp holder is of a standard universal type, the lamp caps are respectively P43T, PX43T and BA20D, and due to the adoption of the universal type lamp holder, the structure of a vehicle and lamp parts of the LED vehicle headlamp are not required to be changed when the vehicle lamp is assembled and replaced for maintenance.
7. The position and size of a high beam and a low beam of the LED vehicle headlamp are required by referring to the position and size of a filament bulb, the position and size of a light emitting point are adjusted and fixed by a reference surface (the reference surface is marked by national standards), the light emitting center of the LED vehicle headlamp is a certain point in the range of 27-34 mm, and the requirement of the light distribution performance of the GB5948-1998 headlamp can be met.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic overall structure diagram of a first substrate of an LED vehicle headlamp of the present invention;
FIG. 2 is a schematic overall structure diagram of a second substrate of the LED vehicle headlamp of the present invention;
FIG. 3 is a schematic view of the overall structure of the rear face of the light distribution screen of the LED vehicle headlamp of the present invention;
FIG. 4 is a schematic diagram of the distribution of the positions of the first and second LED light sources on the first substrate of the LED vehicle headlamp of the present invention;
FIG. 5 is a schematic structural diagram of a light distribution panel according to the present invention;
FIG. 6 is a second schematic view of the light distribution screen of the present invention;
FIG. 7 is a schematic view of the overall configuration of the open face of the light distribution screen of the LED vehicle headlamp of the present invention;
FIG. 8 is a circuit schematic of the drive power supply;
FIG. 9 is a side of a PCB board for a driving power supply;
FIG. 10 is another side of the PCB board with the power supply;
FIG. 11 is a schematic diagram of the pin layout of an IC chip.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 7, the present invention provides an LED vehicle headlamp including:
the display panel comprises a first substrate 11 and a second substrate 12, wherein the first substrate 11 is provided with an A surface, and the second substrate 12 is provided with a B surface, is symmetrical to the A surface of the first substrate 11 and is arranged in a back-to-back mode;
the LED light source comprises a first LED light source 21 and a second LED light source 22 which are arranged in a line on the surface A of the first substrate 11, a third LED light source 23 and a fourth LED light source 24 which are arranged in a line on the surface B of the second substrate 12, wherein the first LED light source 21 is arranged opposite to the third LED light source 23, and the second LED light source 22 is arranged opposite to the fourth LED light source 24;
a pair of light distribution screens, which are respectively oppositely disposed on the a side of the first substrate 11 and the B side of the second substrate 12, and integrally form a bowl-shaped structure (as shown in fig. 7, the entirety of the pair of light distribution screens is in a bowl-shaped structure), the first LED light source 21 is located at the bowl plane of the light distribution screen 31 on the a side, the third LED light source 23 is located at the bowl plane of the light distribution screen 32 on the B side, and preferably, one third of the first LED light source 21 is located in the bowl plane, and two thirds of the first LED light source 21 is located outside the bowl plane. It should be noted that the light distribution screen is arranged according to the standard requirements of the filament bulb and the structural principle, and can meet the optical performance standard of the headlamp.
In the above technical solution, the first LED light source 21 and the third LED light source 23 are combined with the light distribution screen as low beam lights, and the second LED light source 22 and the fourth LED light source 24 are combined as high beam lights.
In another technical scheme, the light emitting surfaces of the first LED light source 21, the second LED light source 22, the third LED light source 23 and the fourth LED light source 24 are all rectangles with the length of 2-8.5 mm and the width of 1-4 mm;
the surface A of the first substrate 11 is provided with a similar rectangular area, the length of the similar rectangular area is 16mm, the width of the similar rectangular area is 8mm, the first LED light sources 21 and the second LED light sources 22 are arranged in the similar rectangular area at intervals along the length direction of the similar rectangular area, and the distance between the first LED light sources 21 and the second LED light sources 22 along the length direction is 0.5-2.8 mm;
the B side of second base plate 12 has the similar rectangle region, the length in similar rectangle region is 16mm, wide 8mm, third LED light source 23 with fourth LED light source 24 is followed the regional length direction interval of similar rectangle set up in the similar rectangle region, third LED light source 23 with fourth LED light source 24 is 0.5 ~ 2.8mm along length direction's interval.
In the above technical solution, taking the surface a of the first substrate 11 as an example, the first LED light source 21 and the second LED light source 22 may be disposed at any position within the rectangular-like region, and the distance between the first LED light source 21 and the second LED light source 22 along the length direction is only required to be kept at 0.5-2.8 mm. The technical problems mainly solved by setting the regional position relationship are that the high beam light is dispersed, the cut-off line required by the low beam is not clear, and the glare is caused. The distance and near light performance test is carried out according to one group of embodiments of the LED headlamp with the LED light source arranged in the area, the problem of glare is avoided, the distance light rays are gathered, and other results are shown in table 1. When any one group of data exceeds the area, the performance test result is not consistent with the initial judgment, and the short-distance light cut-off line is not clear, so that the glare problem can be caused.
In another technical scheme, the LED light sources are cob light sources, and the first to fourth LED light sources 21 to 24 are packaged according to the scope of the present application by using a cob packaging process, so as to provide a light emitting base point for obtaining an illumination distribution requirement meeting the national standard.
In another technical scheme, the device also comprises a radiator 4 and a driving power supply;
two opposite surfaces of the middle part 42 of the radiator 4 are respectively provided with a first groove body and a second groove body; one side 41 of the radiator 4 is inwards sunken to form an accommodating cavity, and the accommodating cavity is communicated with the first groove body and the second groove body, so that a driving power supply and an LED light source arranged on the first groove body and the second groove body are connected with the driving power supply conveniently. The first substrate 11 is fixed in the first groove body, and the LED light source on the first substrate 11 protrudes out of the first groove body; the second substrate 12 is fixed in the second groove body, and the LED light source on the second substrate 12 protrudes out of the second groove body;
and the LED driving power supply is arranged in the accommodating cavity and is connected with the LED light sources corresponding to the first substrate 11 and the second substrate 12 through connecting terminals so as to supply power to the LED light sources. The method specifically comprises the following steps: the LED driving power supply is connected to the cathodes of the high beam and low beam lamps corresponding to the first substrate 11 and the second substrate 12, and the common anode of the high beam and the low beam is connected through a connection terminal. The used LED driving power supply and the connection between the LED driving power supply and the LED light source are all the prior art, and are not described herein again.
In the above technical scheme, through the transformation to 4 structures of radiator, make LED vehicle headlamps realize the integral type structure, convenient the change, through laminating with 4 radiators at the face that first base plate 11 and second base plate 12 are relative, very big improvement the radiating effect, and first base plate 11 and second base plate 12 inlay and locate first cell body and second cell body, do not have the luminous point change that appears that receives external force influence, lead to the change of grading performance.
In another technical solution, as shown in fig. 5, the heat sink 4 includes a first portion 43 located on the other side and having a columnar structure, the middle portion of the heat sink 4 has a cuboid-like structure, the thickness of the middle portion of the heat sink 4 is smaller than the outer diameter of the first portion of the heat sink 4, and the middle portion of the heat sink 4 is connected with the first portion of the heat sink 4 through an inner arc-shaped surface.
In the above technical scheme, because LED operating temperature is higher than 60 ℃, the luminous decay appears in the phosphor powder is ageing easily, and the performance weakens, adopts interior arcwall face to link up to increase the area of radiator 4 when the first portion of radiator 4 and the middle part of radiator 4, improves the radiating effect.
In another technical scheme, the lamp further comprises a lamp holder 5 which is sleeved on one side of the heat sink 4.
In the technical scheme, the lamp holder 5 is selected from a standard universal type, the lamp head models are respectively P43T, PX43T, BA20D and the like, the lamp holder 5 adjusts, assembles and fixes the position size of a light emitting point and the geometric size of a lamp according to the performance requirement of a filament bulb in the assembling process of the LED vehicle headlamp, and the LED vehicle headlamp meets the light distribution performance standard of the headlamp in the subsequent testing process.
In another technical solution, as shown in fig. 6, a ratio of a middle length of the heat sink 4 to a length of the first portion of the heat sink 4 is 2-4: 1, and a ratio of a middle thickness of the heat sink 4 to an outer diameter of the first portion of the heat sink 4 is 1: 3-5. In above-mentioned technical scheme, length and thickness of first portion when this within range, both guaranteed the holistic size of radiator 4 in fit for the within range, avoid radiator 4's quality too heavy, influence the easy skew in position of lamp after the later stage installation, also improved the radiating effect simultaneously.
In another technical scheme, the radiator comprises the following components in parts by weight:
50-60 parts of AL and 20-30 parts of AlB128-10 parts of oxidizing agentTin, 5-8 parts of carbon steel, 0.5-0.8 part of palladium, 3-5 parts of spinel and 3-5 parts of Ni;
the preparation method of the radiator material comprises the following steps: and (3) placing the components in a high-temperature smelting furnace, raising the temperature of the furnace body to 520 ℃, smelting for 2-2.5 hours, and then annealing and cooling after smelting to obtain the radiator material.
In another technical scheme, an insulating layer is arranged on the surface of the middle part of the radiator, and the thickness of the insulating layer is 2-3 mm;
the insulating layer is prepared from the following raw materials in parts by weight: 100 parts of silicon carbide, 20-25 parts of binder, 20-25 parts of clay and 8-12 parts of alumina.
In the technical scheme, after the insulating layer is arranged, the first substrate and the second substrate are fixed on the insulating layer, and heat of the LED headlamp is transferred to the radiator through the insulating layer.
In another technical scheme, the middle of the radiator is arranged to be of a honeycomb structure, the radiator is of an internal structure, after the insulating layer is arranged on the surface of the radiator, the radiator is not influenced in use, and the middle of the radiator is arranged to be of the honeycomb structure so that the radiator has a better radiating effect.
Example 1
The material according to the application is used for manufacturing the radiator, and the radiator is prepared from the following components in parts by weight:
50 parts of AL and 20 parts of AlB 128 parts of tin oxide, 5 parts of carbon steel, 0.5 part of palladium, 3 parts of spinel and 3 parts of Ni.
The preparation method of the radiator material comprises the following steps: placing the components in a high-temperature smelting furnace, raising the temperature of the furnace body to 500 ℃, smelting for 2 hours, and then annealing and cooling after the smelting is finished to obtain the radiator material.
The surface in radiator middle part is provided with the insulating layer, and thickness is 2 mm.
The insulating layer is prepared from the following raw materials in parts by weight: 100 parts of silicon carbide, 20 parts of binder, 20 parts of clay and 8 parts of alumina.
Example 2
The heat sink was fabricated according to the standard of example 1, with the only difference that the middle portion of the heat sink was arranged in a honeycomb structure.
The size and shape of the manufactured radiator are the same as those of the radiator manufactured in the embodiment 1, and the selected material is aluminum with the heat conductivity coefficient of 3.0.
Experiment: the radiators made in the embodiments 1-2 and the comparison group 3 are all heated to 90 ℃, then the three radiators are placed in the constant temperature tanks with the same size, the temperature of each constant temperature tank is 25 ℃, through measurement, the radiator in the embodiment 1 needs 184 seconds when being cooled to 25 ℃ from 90 ℃, the radiator in the embodiment 2 needs 168 seconds when being cooled to 25 ℃ from 90 ℃, and the radiator in the comparison group 3 needs 236 seconds when being cooled to 25 ℃ from 90 ℃, so that the radiator material and the radiator structure can obviously improve the radiating effect.
TABLE 1LED headlamp light distribution test
Low beam cutoff state: clear cut-off line of low beam
Illuminance (unit: Lx) of far/near light on light distribution screen
Note: preliminary judgment of the conformity: v represents a coincidence; and x represents non-compliance.
The inspection basis is as follows: GB5948-
In addition, in order to enable the LED vehicle headlamp to be suitable for different types of vehicles, such as a battery car, a truck, a car and the like, a driving power supply of the LED vehicle headlamp is improved, an integrated controller is manufactured by applying a capacitor, a resistor, a diode, a constant current source, an inductor, an IC chip and the like, the driving power supply realizes that the LED vehicle headlamp can normally work in a voltage range of 9-80V, and controls the overcurrent of a high beam and a low beam separately, so that the low beam is not bright when the high beam reaches high beam brightness, the high beam is not bright when the low beam reaches high beam brightness, and the current is stable. As shown in fig. 8, a schematic diagram of a driving power supply is shown, and the principle of the separated lighting of the high beam and the low beam of the LED vehicle headlamp is as follows:
when the HV is electrified, the HV-N-MOS tube is opened, and meanwhile, the power supply supplies power to the constant-current IC through the D1. (LV isolated by diode D2, LV here no voltage, LV-N-MOS tube closed);
when the LV is electrified, the LV-N-MOS tube is opened, and meanwhile, the power supply supplies power to the constant-current IC through the D2. (HV isolated by diode D1, HV here no voltage, HV-N-MOS tube off);
the principle of constant current and pressure reduction: (the selected material is supported to 80V);
a switching power supply principle (a detection circuit controls the output switching frequency (200KHZ) to control the opening and closing of an internal N-MOS tube, and an inductance charging and discharging principle is added to achieve a constant current state, and the output current is controlled by an external current limiting current);
the power supply supplies power to the IC through R1 (a voltage regulator tube is integrated in the IC), and the power supply must be connected with a capacitor for filtering and interference resistance;
when the built-in MOS tube is turned on, the power supply returns to an IC5 pin (built-in N-MOS D electrode and internal feedback detection) through an LED + … … LED- … … inductor L (inductive charging) … … and passes through R3The resistor limits current to ground.
When the built-in MOS tube is closed, the inductor discharges by follow current discharging of D3 (L … … D)3… … LED + … … LED-back to L).
The PCB design of the present invention is shown in fig. 9-10, all using patch elements.
The IC chip of the present invention is a high-efficiency, step-down, high-voltage MOSFET built-in constant current LED driving circuit, as shown in fig. 11. And the peak current detection mode with fixed turn-off time is adopted, and the highest output voltage can reach 100V. The chip comprises a PWM dimming pin, and the dimming function can be realized by externally adding a PWM signal with 0-100% duty ratio or a 0-1.2V direct current potential. The chip also comprises a temperature compensation pin, a sampling resistor and a thermistor are respectively connected between the temperature compensation pin and the reference pins VREF and GND to realize the temperature compensation function, and the output current can be set to be reduced along with the rise of the temperature after a certain temperature is exceeded. LN2544 the ability to regulate the output current by setting an external sampling resistor. The highest output current can reach 1A. And (4) packaging by adopting MSOP-8/PP. The chip has a certain heat dissipation capacity while ensuring small volume. (built-in DRAIN of the heat sink).
TABLE 2
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (5)
1. An LED vehicle headlamp, comprising:
the substrate comprises a first substrate and a second substrate, wherein the first substrate is provided with an A surface, and the second substrate is provided with a B surface, is symmetrical to the A surface of the first substrate and is arranged in a back direction;
the LED light source comprises a first LED light source and a second LED light source which are arranged in a straight line on the surface A of a first substrate, a third LED light source and a fourth LED light source which are arranged in a straight line on the surface B of a second substrate, wherein the first LED light source and the third LED light source are arranged oppositely, and the second LED light source and the fourth LED light source are arranged oppositely;
the pair of light distribution screens are respectively and oppositely arranged on the surface A of the first substrate and the surface B of the second substrate and integrally form a bowl-shaped structure, the first LED light source is positioned on the bowl plane of the light distribution screen on the surface A, and the third LED light source is positioned on the bowl plane of the light distribution screen on the surface B; one third of the first LED light source and one third of the third LED light source are both in the plane of the bowl, and two thirds of the first LED light source and the third LED light source are outside the plane of the bowl;
the light emitting surfaces of the first LED light source, the second LED light source, the third LED light source and the fourth LED light source are all rectangles with the length of 2-8.5 mm and the width of 1-4 mm;
the surface A of the first substrate is provided with a similar rectangular area, the length of the similar rectangular area is 16mm, the width of the similar rectangular area is 8mm, the first LED light source and the second LED light source are arranged in the similar rectangular area at intervals along the length direction of the similar rectangular area, and the distance between the first LED light source and the second LED light source along the length direction is 0.5-2.8 mm;
the surface B of the second substrate is provided with a similar rectangular area, the length of the similar rectangular area is 16mm, the width of the similar rectangular area is 8mm, the third LED light source and the fourth LED light source are arranged in the similar rectangular area at intervals along the length direction of the similar rectangular area, and the distance between the third LED light source and the fourth LED light source along the length direction is 0.5-2.8 mm;
the device also comprises a radiator and a driving power supply;
two opposite surfaces in the middle of the radiator are respectively provided with a first groove body and a second groove body; one side of the radiator is inwards sunken to form an accommodating cavity, and the accommodating cavity is communicated with the first groove body and the second groove body; the first substrate is fixed in the first groove body, and the LED light source on the first substrate protrudes out of the first groove body; the second substrate is fixed in the second groove body, and the LED light source on the second substrate protrudes out of the second groove body;
the LED driving power supply is arranged in the accommodating cavity and is connected with the LED light sources corresponding to the first substrate and the second substrate through connecting terminals so as to supply power to the LED light sources;
the radiator comprises the following components in parts by weight:
50-60 parts of AL and 20-30 parts of AlB128-10 parts of tin oxide, 5-8 parts of carbon steel, 0.5-0.8 part of palladium, 3-5 parts of spinel and 3-5 parts of Ni;
the preparation method of the radiator material comprises the following steps: placing the components in a high-temperature smelting furnace, raising the temperature of the furnace body to 520 ℃, smelting for 2-2.5 hours, and then annealing and cooling after smelting to obtain a radiator material;
the surface of the middle part of the radiator is provided with an insulating layer with the thickness of 2-3 mm;
the insulating layer is prepared from the following raw materials in parts by weight: 100 parts of silicon carbide, 20-25 parts of binder, 20-25 parts of clay and 8-12 parts of alumina;
the middle part of the radiator is arranged to be of a honeycomb structure.
2. The LED vehicle headlamp of claim 1 wherein the LED light source is a cob light source.
3. The LED vehicle headlamp of claim 1, wherein the heat sink includes a first portion at the other side, which is a columnar structure, a middle portion of the heat sink is a cuboid-like structure, a thickness of the middle portion of the heat sink is smaller than an outer diameter of the first portion of the heat sink, and the middle portion of the heat sink is engaged with the first portion of the heat sink through an inner arc-shaped surface.
4. The LED vehicle headlamp of claim 1 further comprising a socket that is received on one side of the heat sink.
5. The LED vehicle headlamp of claim 3, wherein a ratio of a length of the middle portion of the heat sink to a length of the first portion of the heat sink is 2 to 4:1, and a ratio of a thickness of the middle portion of the heat sink to an outer diameter of the first portion of the heat sink is 1:3 to 5.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106871039A CN106871039A (en) | 2017-06-20 |
| CN106871039B true CN106871039B (en) | 2020-06-19 |
Family
ID=59159048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710056228.6A Active CN106871039B (en) | 2017-01-26 | 2017-01-26 | LED vehicle headlamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106871039B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204026435U (en) * | 2014-05-04 | 2014-12-17 | 浙江保镖电子科技有限公司 | The LED headlight of a kind of motorcycle and electric motor car |
| CN205480665U (en) * | 2016-03-21 | 2016-08-17 | 广州市雷腾照明科技有限公司 | Car lights source grading structure |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203273609U (en) * | 2013-03-06 | 2013-11-06 | 徐宝洲 | Near-far light integrated LED (light emitting diode) vehicle headlamp |
| JP6247090B2 (en) * | 2013-12-26 | 2017-12-13 | 昭和電工株式会社 | Liquid cooling type cooling device and manufacturing method of radiator for liquid cooling type cooling device |
| CN203880555U (en) * | 2014-04-18 | 2014-10-15 | 竺桂荣 | High beam and low beam integrated automobile headlamp based on LED |
| CN204611596U (en) * | 2015-05-19 | 2015-09-02 | 重庆煜庆耀电子科技有限责任公司 | A kind of LED headlight for vehicle |
| CN204786200U (en) * | 2015-07-14 | 2015-11-18 | 佛山市塔孚汽车照明有限公司 | Two light LED light source chip arrays of mariages for motor vehicle |
| CN205606386U (en) * | 2016-04-05 | 2016-09-28 | 东莞市霍晶光电科技有限公司 | Light -emitting diode (LED) car lamp |
| CN205716859U (en) * | 2016-04-14 | 2016-11-23 | 海盐丽光电子科技有限公司 | A kind of LED automobile lens of distance-light one |
| CN106221242A (en) * | 2016-05-23 | 2016-12-14 | 魏国营 | LED down lamp with air convection heat dissipation function |
| CN106187243B (en) * | 2016-07-22 | 2019-01-04 | 武汉科技大学 | A kind of cement kiln spinel refractory and preparation method thereof |
| CN106195862A (en) * | 2016-08-31 | 2016-12-07 | 南宁燎旺车灯股份有限公司 | A kind of brand-new LED distance-light one headlamp projection lamp core |
| CN206469176U (en) * | 2017-01-26 | 2017-09-05 | 松滋市飞欧电器照明有限公司 | LED vehicle head lamps |
-
2017
- 2017-01-26 CN CN201710056228.6A patent/CN106871039B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204026435U (en) * | 2014-05-04 | 2014-12-17 | 浙江保镖电子科技有限公司 | The LED headlight of a kind of motorcycle and electric motor car |
| CN205480665U (en) * | 2016-03-21 | 2016-08-17 | 广州市雷腾照明科技有限公司 | Car lights source grading structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106871039A (en) | 2017-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201330950Y (en) | LED lamp tube | |
| US11215326B2 (en) | Filament lamp lighting module and manufacturing method thereof | |
| CN106871039B (en) | LED vehicle headlamp | |
| CN204005371U (en) | LED spot light | |
| CN201555069U (en) | Efficient heat-dissipation type LED lamp | |
| CN209511634U (en) | A kind of LED light of adjustable color | |
| CN202392511U (en) | LED (light-emitting diode) lamp capable of freely adjusting colour temperature | |
| CN203071067U (en) | Anti-dazzling color temperature adjustable high-voltage LED lamp bead and lamp formed by same | |
| CN206409920U (en) | One kind is without stroboscopic Dimmable LED bulb | |
| CN213542120U (en) | Novel LED dimmable lamp tube | |
| CN207831028U (en) | A kind of LED light of tunable optical | |
| CN204534381U (en) | A kind of headlight for vehicles | |
| CN204611455U (en) | All-round smooth Dimmable LED light fixture | |
| CN203674165U (en) | Energy-saving tungsten lamp | |
| CN203349170U (en) | Energy-saving LED (Light Emitting Diode) lamp | |
| CN207213939U (en) | A kind of LED Rear Fog Lamps of automobile | |
| CN206469176U (en) | LED vehicle head lamps | |
| CN203893027U (en) | LED lamp bulb for headlamp of motorcycle or electric car | |
| CN207939800U (en) | A kind of LED linear constant-current control circuit based on discrete component | |
| CN211930911U (en) | Dimming module and LED lamp dimming device | |
| CN219678720U (en) | Colour temperature regulating circuit for down lamp | |
| CN204268280U (en) | A kind of LED light lamp with so lder ball bonding | |
| CN205050866U (en) | Take LED circuit board of strengthening rib | |
| CN107883340A (en) | A kind of LED Rear Fog Lamps of automobile | |
| CN204268427U (en) | A kind of LED light lamp with radiator structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |