CN107023795B

CN107023795B - LED automobile headlamp module with high-low beam function

Info

Publication number: CN107023795B
Application number: CN201710303822.0A
Authority: CN
Inventors: 郎欢标
Original assignee: Dong Guan Longideal Industrial Co ltd
Current assignee: Dong Guan Longideal Industrial Co ltd
Priority date: 2017-05-02
Filing date: 2017-05-02
Publication date: 2023-12-19
Anticipated expiration: 2037-05-02
Also published as: CN107023795A

Abstract

The invention relates to an LED automobile headlamp module with a high beam and low beam function, which comprises a radiator, a low beam LED light source, a high beam LED light source, a light blocking piece and a compound lens, wherein the low beam LED light source, the high beam LED light source, the light blocking piece and the compound lens are respectively and fixedly connected with the radiator; the light spot of the dipped beam is wider, can reach 80-90 degrees, the uniformity of the light spot is better, and the cut-off line is clear; the high beam is converged through a plurality of condensing lenses respectively to form a combined beam with a narrow angle, so that the condensing capability is strong and the far-illumination capability is good; the high-low beam is only controlled by controlling the brightness of the upper and lower groups of different LED light sources, the electromagnetic valve is not required to move the light blocking piece up and down to control, and the time for switching the high beam and the low beam is only a fraction of milliseconds.

Description

LED automobile headlamp module with high-low beam function

Technical Field

The invention relates to the technical field of illumination appliances, in particular to an LED automobile headlamp module with a high beam and low beam function.

Background

The existing projection type automobile front lighting system integrating high beam and low beam generally adopts the same light source (a xenon lamp bulb or an integrated module type COB light source arranged upwards), and an ellipsoidal reflector cup is used for converging the light rays emitted by the light source onto a light blocking sheet. The light blocking sheet is arranged into a certain shape according to the requirements of traffic regulations, the ellipsoidal reflector is converged to the light spots on the light blocking sheet to intercept light, unnecessary parts are blocked, and the intercepted light spots pass through the projection objective lens and then project low-beam light spots with clear cut-off lines. The light blocking sheet can be controlled by the electromagnetic valve to move up and down so as to realize the conversion of the far-near light type. When the light blocking sheet is positioned at the upper position, the light blocking sheet cuts off light spots above the horizontal line, and a light pattern of low beam is projected through the projection objective; when the light barrier moves downwards, the light spots converged to the position of the light barrier are not blocked, and the projection objective projects the light spots positioned above the horizontal line to form a high beam light type.

The conventional front projection system of a car with integrated high beam and low beam generally adopts the structure shown in fig. 1 and 2. Fig. 1 shows a projection HID lamp automotive headlight (patent No. US 6,186,651 B1) proposed by Inc in united states Visteon Global Technologies, which adopts an ellipsoidal reflector 10 to converge the light emitted from an HID (high pressure gas discharge lamp) bulb to the position of a light blocking sheet 22, the position of the light emitting point of the HID is located at the inner focal position of the ellipsoidal reflector 10, and the other focal point 2 after the light convergence is located at the position of the light blocking sheet 22. The light blocking sheet 22 intercepts the converged light, and then projects a light spot with clear cut-off line according with traffic regulations through the front projection objective 24. The up-and-down movement of the light blocking sheet 22 is controlled by the electromagnetic valve 40 to form the desired switching of the high beam and the low beam.

Visteon Global Technologies, inc. also proposes a projection type automotive headlamp based on LED light sources (patent number: U.S. Pat. No. 7,410,282 B2), as shown in FIG. 2. Which consists of an upwardly placed LED light source 12, an ellipsoidal reflector 14, a light blocking mechanism 20 and a projection objective 26. It also adopts an ellipsoidal reflector 14 to converge the light emitted by the LED light source 12 to the position of the light blocking mechanism 20, the position of the light emitting point of the LED light source 12 is located at the inner focal point of the ellipsoidal reflector 14, and the other focal point after the light is converged is located at the position of the light blocking mechanism 20. The light blocking mechanism 20 intercepts the converged light, and then projects a light spot with clear cut-off line according with traffic regulations through the front projection objective 26. The light blocking mechanism 20 is provided with an electromagnetic valve to move up and down, so as to switch the required high beam and low beam.

Currently, the main stream lamp factories in the market such as the projection type HID automobile headlamps from the factory of the usa, viston, germany sea-sky (hela), japan small-system (Koito), or LED automobile headlamps are all based on the above projection type structure. The structure has the advantages that the cut-off line of the dipped beam light spot is quite clear, the glare is quite well controlled, the lamp cap is compact, the lamp cap is quite easy to manufacture into a self-adaptive lamp capable of swinging along with road conditions, the far and near beams can be switched in the same lamp through one electromagnetic valve, and two lamps do not need to be arranged independently.

However, this projection type vehicle lamp has obvious disadvantages: firstly, the response speed of the electromagnetic valve is relatively slow, generally tens of milliseconds, the electromagnetic valve is easy to damage, and the far and near light cannot be freely switched after the electromagnetic valve is damaged. Because of the light type of the low beam and the high beam, the light condensing capability of the high beam is not strong enough, and the far-light capability is relatively poor. Moreover, the light distribution of the reflector must be compatible with the central bright spot of the high beam with a narrow angle and the low beam spot with a uniform wide angle, the middle of the spot is stronger, the edge is darker, the low beam spot is not uniform enough, the beam angle of the low beam is also narrower, generally more than 60 degrees, and the improvement is necessary.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an LED automobile headlamp module with a high beam and a low beam, wherein the low beam is a uniform light spot with a wider irradiation range and a clear cut-off line, and the high beam is a flat elliptic or circular light spot with a narrower convergence angle; the LED light source used for passing the dipped beam passes through a light mixing distance, then passes through a light blocking sheet, and then passes through a projection objective lens to project the dipped beam with a distinct cut-off line, and the LED light source has the advantages that the dipped beam light spot is wider, can reach 80-90 degrees, has good uniformity, and has a distinct cut-off line; the high beam is converged through a plurality of condensing lenses with smaller sizes to form a combined beam with a narrow angle, and the small lenses can be used for distributing light into elliptical narrow-angle light spots or circular narrow-angle light spots according to requirements; the high-low beam is realized by controlling the brightness of the upper group of LED light sources and the lower group of LED light sources, the control of moving the light blocking piece up and down through the electromagnetic valve is not needed, the time for switching the high beam and the low beam is only a few tenths of milliseconds, the working state is stable and not easy to damage, when the upper group of LED light sources are lightened, the lower group of LED light sources are extinguished, the upper group of LED light sources are dipped, and when the upper group of LEDs and the lower group of LED light sources are lightened simultaneously, the upper group of LED light sources and the lower group of LED light sources are dipped.

The aim of the invention is achieved by the following technical scheme.

The utility model provides a LED automobile headlamp module with far and near light function, includes radiator, low beam LED light source, far beam LED light source, light blocking piece and compound lens, the low beam LED light source the far beam LED light source the light blocking piece with compound lens respectively with radiator fixed connection, the low beam LED light source is located the upper rear portion of radiator, the far beam LED light source is located the lower front portion of radiator, the light blocking piece is located the place ahead of low beam LED light source, the upper portion of compound lens is located the place ahead of light blocking piece, the lower part of compound lens is located the place ahead of far beam LED light source.

The radiator is fixedly connected with a fixing seat, and the composite lens is fixedly connected with the fixing seat.

The fixing seat is in threaded connection with the lens barrel, and the compound lens is fixedly connected with the lens barrel.

The bottom of the radiator is fixedly connected with a cooling fan.

The light blocking sheet comprises a first straight sheet, a first arc sheet, a second arc sheet and a second straight sheet which are sequentially integrated into one piece from left to right.

The height of the first straight piece is equal to that of the first arc piece, the height of the second straight piece is equal to that of the second arc piece, and the height of the first arc piece is larger than that of the second arc piece.

And a slope is arranged at the connection position of the top of the first arc-shaped piece and the top of the second arc-shaped piece.

Wherein the inclination angle of the slope is 45 degrees.

Wherein the light blocking sheet protrudes toward the low beam LED light source.

The first straight piece and the second straight piece are respectively fixedly connected with a fixing plate, and fixing holes are formed in the fixing plates.

The irradiation direction of the low beam LED light source and the irradiation direction of the high beam LED light source are both arranged forward.

The light beam is focused to a certain extent, the focused light spot is ensured to be at the position of the strongest light intensity at the light interception position of the light barrier, the focused and deflected light beam is intercepted by the light barrier, and a dipped beam light spot with a clear cut-off is formed after being projected by the composite lens.

The secondary optical lens is an off-axis free-form surface cylindrical mirror and a light guide column.

The low-beam LED light source comprises a plurality of high-power patch LEDs, and the high-power patch LEDs are uniformly distributed in rows.

The number of the high-power patch LEDs is 12, the arrangement mode of the high-power patch LEDs is that 3 groups of the high-power patch LEDs are connected in series, and 4 groups of the high-power patch LEDs are connected in parallel and are arranged into a linear light source.

The low-beam LED light source is a strip COB integrated light source module type LED.

The high beam LED light source comprises a plurality of bulb LEDs or flat head LEDs, and the bulb LEDs or the flat head LEDs are equidistantly arranged at intervals.

The low-beam LED light source is characterized in that a light mixing distance is arranged between the low-beam LED light source and the light blocking sheet, and the light mixing distance is 5-15 mm.

The upper half part of the compound lens is a projection objective lens for low beam, and the lower half part of the compound lens is a condensing lens for high beam.

Wherein the projection objective is a large convex lens.

Wherein the condensing lens includes a plurality of lenslets.

Wherein the number of the small lenses is 3.

The small lenses are free-form surface convex lenses with different light distribution angles in the horizontal direction and the vertical direction, the high beam LED light source is collimated and distributed in the vertical direction, the high beam LED light source is expanded by a certain angle in the horizontal direction, the light distribution angle in the horizontal direction is theta 1, and the theta 1 is 20-30 degrees.

Wherein θ1 is 24 degrees.

The small lenses are free-form surface total reflection condensing lenses with different light distribution angles in the horizontal direction and the vertical direction, the high beam LED light sources are collimated and distributed in the vertical direction, and the high beam LED light sources are expanded by a certain angle in the horizontal direction.

The refraction part in the middle of the free-form surface total reflection condensing lens and the total reflection part on the side face collimate all incident light, the horizontal section of the free-form surface total reflection condensing lens expands light distribution of a certain angle for a high beam LED light source, the light distribution angle is theta 2, the refraction part in the middle of the free-form surface total reflection condensing lens directly diffuses light beams, the diffusion angle is theta 3, the total reflection part on the side face of the free-form surface total reflection condensing lens crossly converges incident light beams inwards, and after convergence, the incident light beams diffuse again, and the diffusion angle is theta 4 and theta 4 is 20-30 degrees.

Wherein θ4 is 24 degrees.

The small lenses are round aspheric convex lenses with the same horizontal and vertical light distribution angles, the vertical section and the horizontal section of the round aspheric convex lenses are all collimated light distribution for the high beam LED light source, the round aspheric convex lenses collimate all incident light rays, and after the light distribution of the round aspheric convex lenses, the high beam forms a round narrow-angle converging light spot.

The small lenses are circular total reflection collimating lenses with symmetrical light distribution, the vertical section and the horizontal section of the small lenses are all collimated light distribution of the high beam LED light source, the circular total reflection collimating lenses collimate all incident light rays, and after the light distribution of the circular total reflection collimating lenses, the high beam forms a circular narrow-angle converging light spot.

The outer reflecting surface of the circular total reflection collimating lens is a scale surface.

The center of the surface of the scale is provided with a counter bore, a plano-convex lens is arranged in the counter bore, the bottom of the plano-convex lens is subjected to micro-lens array treatment, the plano-convex lens is used for mixing light in a small angle range after intermediate light rays are collimated, meanwhile, square light spots projected by a high beam LED light source are mixed into round light spots, and after the round total reflection collimating lens is used for distributing light and mixing light, the high beam forms a round converging light spot with a narrow angle and uniform color temperature.

The small lenses are Fresnel collimating lenses, the vertical section and the horizontal section of the Fresnel collimating lenses are all collimated light distribution, the Fresnel collimating lenses collimate all incident light rays, and after the light distribution of the Fresnel collimating lenses, the high beam forms a circular narrow-angle converging light spot.

The condensing lens further comprises a cylindrical lens array, and the 3 circular total reflection collimating lenses are arranged opposite to the cylindrical lens array.

The circular total reflection collimating lens collimates light rays incident by the high beam LED light source, the cylindrical lens array expands the light beams collimated by the circular total reflection collimating lens along the horizontal direction by an angle theta 5, the theta 5 is 20-30 degrees, and the expanded high beam forms an oblate narrow-angle converging light spot.

The projection objective is a binary optical diffraction curved surface, and the binary optical diffraction curved surface is used for generating chromatic aberration opposite to the projection objective, so that the blue chromatic aberration problem of the position near the cut-off line of the projected dipped beam light spot is corrected.

The convex surface or the plane of the projection objective is carved with a ring-shaped step-shaped grating microstructure which is used for correcting chromatic aberration of projection light spots.

The invention has the beneficial effects that: the LED automobile headlamp module with the high beam and the low beam has the advantages that the low beam is a uniform light spot with a wider irradiation range and clear cut-off line, and the high beam is a flat elliptic or circular light spot with a narrower convergence angle; the LED light source used for passing the dipped beam passes through a light mixing distance, then passes through a light blocking sheet, and then passes through a projection objective lens to project the dipped beam with a distinct cut-off line, and the LED light source has the advantages that the dipped beam light spot is wider, can reach 80-90 degrees, has good uniformity, and has a distinct cut-off line; the high beam is converged through a plurality of condensing lenses with smaller sizes to form a combined beam with a narrow angle, and the small lenses can be used for distributing light into elliptical narrow-angle light spots or circular narrow-angle light spots according to requirements; the high-low beam is realized by controlling the brightness of the upper group of LED light sources and the lower group of LED light sources, the control of moving the light blocking piece up and down through the electromagnetic valve is not needed, the time for switching the high beam and the low beam is only a few tenths of milliseconds, the working state is stable and not easy to damage, when the upper group of LED light sources are lightened, the lower group of LED light sources are extinguished, the upper group of LED light sources are dipped, and when the upper group of LEDs and the lower group of LED light sources are lightened simultaneously, the upper group of LED light sources and the lower group of LED light sources are dipped.

Drawings

The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.

Fig. 1 is a schematic diagram of a prior art projection HID lamp automotive headlamp.

Fig. 2 is a schematic structural diagram of a projection type automotive headlamp based on an LED light source in the prior art.

Fig. 3 is an exploded structure schematic view of embodiment 1.

Fig. 4 is a schematic structural view of the low beam LED light source of the present invention.

Fig. 5 is a front view of the compound lens of embodiment 1.

Fig. 6 is a left side view of the compound lens of embodiment 1.

Fig. 7 is a schematic structural view of the light blocking sheet of the present invention.

Fig. 8 is a schematic view of another view angle of the light blocking sheet of the present invention.

Fig. 9 is a low beam schematic diagram of example 1.

Fig. 10 is a high beam schematic diagram of example 1.

Fig. 11 is a schematic diagram of the high beam at another view angle of example 1.

Fig. 12 is a graph showing the light distribution effect of the low beam of example 1 at a distance of 25 meters.

Fig. 13 is a test point verification chart of the low beam design result of example 1.

Fig. 14 is a graph showing the light distribution effect of the high beam of example 1 at 25 meters.

Fig. 15 is a test point verification chart of the high beam design result of example 1.

Fig. 16 is an exploded structural schematic diagram of embodiment 2.

Fig. 17 is a front view of the compound lens of embodiment 2.

Fig. 18 is a rear view of the compound lens of embodiment 2.

Fig. 19 is a left side view of the compound lens of embodiment 2.

Fig. 20 is a high beam schematic diagram of example 2.

Fig. 21 is a schematic diagram of the high beam at another view angle of example 2.

Fig. 22 is a front view of the compound lens of embodiment 3.

Fig. 23 is a left side view of the compound lens of embodiment 3.

Fig. 24 is a high beam schematic of example 3.

Fig. 25 is a schematic diagram of the high beam at another view angle of example 3.

Fig. 26 is a front view of the compound lens of embodiment 4.

Fig. 27 is a rear view of the compound lens of embodiment 4.

Fig. 28 is a left side view of the compound lens of embodiment 4.

Fig. 29 is a high beam schematic of example 4.

Fig. 30 is a schematic diagram of the high beam at another view angle of example 4.

Fig. 31 is a front view of the compound lens of embodiment 5.

Fig. 32 is a rear view of the compound lens of embodiment 5.

Fig. 33 is a left side view of the compound lens of example 5.

Fig. 34 is a high beam schematic of example 5.

Fig. 35 is a schematic view of the high beam at another view angle of example 5.

Fig. 36 is a front view of the compound lens of embodiment 6.

Fig. 37 is a left side view of the compound lens of example 6.

Fig. 38 is a high beam schematic of example 6.

Fig. 39 is a schematic diagram of the high beam at another view angle of example 6.

Fig. 40 is a front view of the compound lens of embodiment 7.

Fig. 41 is a rear view of the compound lens of embodiment 7.

Fig. 42 is a left side view of the compound lens of example 7.

Fig. 43 is a high beam schematic of example 7.

Fig. 44 is a schematic diagram of the high beam at another view angle of example 7.

Fig. 45 is an exploded structural schematic view of embodiment 8.

FIG. 46 is a schematic diagram of example 8.

Detailed Description

The invention will be further described with reference to the following examples and figures.

Example 1

As shown in fig. 3 to 15, the LED automotive headlamp module with high-low beam function of the present embodiment includes a radiator 180, a low beam LED light source 110, a high beam LED light source 160, a light blocking sheet 120 and a compound lens 150, where the low beam LED light source 110, the high beam LED light source 160, the light blocking sheet 120 and the compound lens 150 are respectively fixedly connected with the radiator 180, the low beam LED light source 110 is disposed at the upper rear portion of the radiator 180, the high beam LED light source 160 is disposed at the lower front portion of the radiator 180, the light blocking sheet 120 is disposed at the right front portion of the low beam LED light source 110, the upper portion of the compound lens 150 is disposed at the right front portion of the light blocking sheet 120, and the lower portion of the compound lens 150 is disposed at the right front portion of the high beam LED light source 160.

The radiator 180 of the present embodiment is fixedly connected with a fixing base 130, the compound lens 150 is fixedly connected with the fixing base 130, the fixing base 130 is screwed with the lens barrel 140, and the compound lens 150 is fixedly connected with the lens barrel 140. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 150.

The bottom of the radiator 180 of the present embodiment is fixedly connected with a cooling fan 170. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 120 of the present embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The connection position between the top of the first arc-shaped piece and the top of the second arc-shaped piece is provided with a slope.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 120 of the present embodiment protrudes toward the low beam LED light source 110.

The first straight piece and the second straight piece of the embodiment are respectively and fixedly connected with a fixing plate, and the fixing plate is provided with a fixing hole.

The irradiation direction of the low beam LED light source 110 and the irradiation direction of the high beam LED light source 160 of the present embodiment are both set forward.

The low beam LED light source 110 of the present embodiment includes a plurality of high power patch LEDs, which are uniformly distributed in a row.

The high beam LED light source 160 of this embodiment includes a plurality of bulb LEDs or flat head LEDs, and the plurality of bulb LEDs or flat head LEDs are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 110 and the light blocking sheet 120, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 150 in this embodiment is a projection objective 151 for low beam, the focal point of the projection objective 151 is located in the middle of the light blocking sheet 120, and the lower half of the compound lens 150 is a condenser lens for high beam.

The projection objective 151 of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 152.

The number of lenslets 152 in this embodiment is 3.

The lenslets 152 of this embodiment are free-form convex lenses with different horizontal and vertical light distribution angles.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 120 is located at the front focal position of the projection objective 151, the light blocking sheet 120 intercepts a single row of low beam LED light sources 110, blocks a part of light emitted by the low beam LED light sources 110, forms a cut-off line with clear brightness at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 151.

The light distribution principle of the high beam function of this embodiment is: the 3 free-form surface convex lenses perform collimation and light distribution on the high-beam LED light source 160 in the vertical direction, the high-beam LED light source 160 is expanded by a certain angle in the horizontal direction, the light distribution angle in the horizontal direction is theta 1, and the theta 1 is 20-30 degrees; preferably, θ1 is 24 degrees; after the light is distributed by the free-form convex lens, the high beam forms a narrow-angle oblate convergent light spot.

Example 2

As shown in fig. 16 to 21, the LED automotive headlamp module with high-low beam function of the present embodiment includes a radiator 280, a low beam LED light source 210, a high beam LED light source 260, a light blocking sheet 220 and a compound lens 250, wherein the low beam LED light source 210, the high beam LED light source 260, the light blocking sheet 220 and the compound lens 250 are respectively and fixedly connected with the radiator 280, the low beam LED light source 210 is disposed at the upper rear portion of the radiator 280, the high beam LED light source 260 is disposed at the lower front portion of the radiator 280, the light blocking sheet 220 is disposed at the right front portion of the low beam LED light source 210, the upper portion of the compound lens 250 is disposed at the right front portion of the light blocking sheet 220, and the lower portion of the compound lens 250 is disposed at the right front portion of the high beam LED light source 260.

The heat sink 280 of the present embodiment is fixedly connected with a fixing base 230, the compound lens 250 is fixedly connected with the fixing base 230, the fixing base 230 is screwed with the lens barrel 240, and the compound lens 250 is fixedly connected with the lens barrel 240. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 250.

The bottom of the radiator 280 of the present embodiment is fixedly connected with a cooling fan 270. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 220 of this embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 220 of the present embodiment protrudes toward the low-beam LED light source 210.

The irradiation direction of the low beam LED light source 210 and the irradiation direction of the high beam LED light source 260 of the present embodiment are both set forward.

The low beam LED light source 210 of the present embodiment includes a plurality of high power patch LEDs, and the plurality of high power patch LEDs are uniformly distributed in a row.

The low beam LED light source 210 of the present embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 260 of this embodiment includes a plurality of bulb LEDs or flat head LEDs, and the plurality of bulb LEDs or flat head LEDs are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 210 and the light blocking sheet 220, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 250 of the present embodiment is a projection objective 251 for low beam, and the lower half of the compound lens 250 is a condenser lens for high beam.

The projection objective 251 of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 252.

The number of lenslets 252 in this embodiment is 3.

The lenslet 252 in this embodiment is a free-form surface total reflection condensing lens with different horizontal and vertical light distribution angles, and performs collimation light distribution on the high beam LED light source 260 in the vertical direction, and expands light distribution of a certain angle on the high beam LED light source 260 in the horizontal direction.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 220 is located at the front focal position of the projection objective 251, the light blocking sheet 220 intercepts a single row of low beam LED light sources 210, blocks a part of light emitted by the low beam LED light sources 210, forms a cut-off line with bright and dark at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 251.

The distance light principle of this embodiment: the refraction part in the middle of the free-form surface total reflection condensing lens and the total reflection part on the side surface collimate all the incident light, the horizontal section of the free-form surface total reflection condensing lens expands the light distribution of a certain angle for the high beam LED light source 260, the light distribution angle is theta 2, the refraction part in the middle of the free-form surface total reflection condensing lens directly diffuses the light beam, the diffusion angle is theta 3, the total reflection part on the side surface of the free-form surface total reflection condensing lens crossly converges the incident light beam inwards, and diffuses again after converging, the diffusion angle is theta 4, and the diffusion angle is theta 4-30 degrees; preferably, θ4 is 24 degrees; after the light distribution of the free-form surface total reflection condensing lens, the high beam forms a narrow-angle oblate converging light spot.

Example 3

As shown in fig. 22 to 25, an LED automotive headlamp module with high-low beam function in this embodiment includes a radiator 380, a low beam LED light source 310, a high beam LED light source 360, a light blocking sheet 320 and a compound lens 350, wherein the low beam LED light source 310, the high beam LED light source 360, the light blocking sheet 320 and the compound lens 350 are respectively fixedly connected with the radiator 380, the low beam LED light source 310 is disposed at the upper rear portion of the radiator 380, the high beam LED light source 360 is disposed at the lower front portion of the radiator 380, the light blocking sheet 320 is disposed at the right front portion of the low beam LED light source 310, the upper portion of the compound lens 350 is disposed at the right front portion of the light blocking sheet 320, and the lower portion of the compound lens 350 is disposed at the right front portion of the high beam LED light source 360.

The radiator 380 of the present embodiment is fixedly connected with a fixing seat 330, the composite lens 350 is fixedly connected with the fixing seat 330, the fixing seat 330 is screwed with a lens barrel, and the composite lens 350 is fixedly connected with the lens barrel. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 350.

The bottom of the radiator 380 of the present embodiment is fixedly connected with a cooling fan 370. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 320 of this embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 320 of the present embodiment protrudes toward the low beam LED light source 310.

The irradiation direction of the low beam LED light source 310 and the irradiation direction of the high beam LED light source 360 of the present embodiment are both set forward.

The low beam LED light source 310 of the present embodiment includes a plurality of high power patch LEDs, which are uniformly distributed in a row.

The low beam LED light source 310 of this embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 360 of this embodiment includes a plurality of bulb LEDs or flat head LEDs, which are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 310 and the light blocking sheet 320, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 350 of the present embodiment is a projection objective 351 for low beam, and the lower half of the compound lens 350 is a condenser lens for high beam.

The projection objective 351 of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 352.

The number of lenslets 352 in this embodiment is 3.

The lenslet 352 of this embodiment is a circular aspherical convex lens having the same horizontal and vertical light distribution angles.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 320 is located at the front focal position of the projection objective 351, the light blocking sheet 320 intercepts a single row of low beam LED light sources 310, blocks a part of light emitted by the low beam LED light sources 310, forms a cut-off line with a clear shade at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 351.

The light distribution principle of the high beam function of this embodiment is: the vertical section and the horizontal section of the circular aspheric convex lens are all collimated light distribution for the high beam LED light source 360, the circular aspheric convex lens collimates all incident light rays, and after the light distribution of the circular aspheric convex lens, the high beam forms a circular narrow-angle converging light spot.

Example 4

As shown in fig. 26 to 30, an LED automotive headlamp module with high-low beam function in this embodiment includes a radiator 480, a low beam LED light source 410, a high beam LED light source 460, a light blocking sheet 420 and a compound lens 450, wherein the low beam LED light source 410, the high beam LED light source 460, the light blocking sheet 420 and the compound lens 450 are respectively fixedly connected with the radiator 480, the low beam LED light source 410 is disposed at the upper rear portion of the radiator 480, the high beam LED light source 460 is disposed at the lower front portion of the radiator 480, the light blocking sheet 420 is disposed at the right front portion of the low beam LED light source 410, the upper portion of the compound lens 450 is disposed at the right front portion of the light blocking sheet 420, and the lower portion of the compound lens 450 is disposed at the right front portion of the high beam LED light source 460.

The heat sink 480 of the present embodiment is fixedly connected with a fixing base 430, the compound lens 450 is fixedly connected with the fixing base 430, the fixing base 430 is screwed with a lens barrel, and the compound lens 450 is fixedly connected with the lens barrel. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 450.

A cooling fan 470 is fixedly connected to the bottom of the heat sink 480 of the present embodiment. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 420 of the present embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 420 of the present embodiment protrudes toward the low-beam LED light source 410.

The irradiation direction of the low beam LED light source 410 and the irradiation direction of the high beam LED light source 460 of the present embodiment are both disposed forward.

The low beam LED light source 410 of the present embodiment includes a plurality of high power patch LEDs, which are uniformly distributed in a row.

The low beam LED light source 410 of the present embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 460 of the present embodiment includes a plurality of bulb LEDs or flat head LEDs, and the plurality of bulb LEDs or flat head LEDs are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 410 and the light blocking sheet 420, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 450 of the present embodiment is a projection objective 451 for low beam, and the lower half of the compound lens 450 is a condenser lens for high beam.

The projection objective 451 of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 452.

The number of lenslets 452 in this embodiment is 3.

The lenslet 452 of this embodiment is a circular total reflection collimating lens for symmetric light distribution.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 420 is located at the front focal position of the projection objective 451, the light blocking sheet 420 intercepts a single row of low beam LED light sources 410, blocks a part of light emitted by the low beam LED light sources 410, forms a cut-off line with a clear shade at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 451.

The light distribution principle of the high beam function of this embodiment is: the vertical section and the horizontal section of the circular total reflection collimating lens are all collimated light distribution of the high beam LED light source 460, the circular total reflection collimating lens collimates all incident light rays, and after the light distribution of the circular total reflection collimating lens, the high beam forms a circular narrow-angle converging light spot.

Example 5

As shown in fig. 31 to 35, an LED automotive headlamp module with high-low beam function of the present embodiment includes a radiator 580, a low beam LED light source 510, a high beam LED light source 560, a light blocking sheet 520 and a compound lens 550, wherein the low beam LED light source 510, the high beam LED light source 560, the light blocking sheet 520 and the compound lens 550 are respectively fixedly connected with the radiator 580, the low beam LED light source 510 is disposed at the upper rear portion of the radiator 580, the high beam LED light source 560 is disposed at the lower front portion of the radiator 580, the light blocking sheet 520 is disposed at the right front portion of the low beam LED light source 510, the upper portion of the compound lens 550 is disposed at the right front portion of the light blocking sheet 520, and the lower portion of the compound lens 550 is disposed at the right front portion of the high beam LED light source 560.

The radiator 580 of the present embodiment is fixedly connected with a fixing base 530, the compound lens 550 is fixedly connected with the fixing base 530, the fixing base 530 is screwed with a lens barrel, and the compound lens 550 is fixedly connected with the lens barrel. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 550.

A heat radiation fan 570 is fixedly connected to the bottom of the heat sink 580 of the present embodiment. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 520 of this embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 520 of the present embodiment protrudes toward the low-beam LED light source 510.

The irradiation direction of the low beam LED light source 510 and the irradiation direction of the high beam LED light source 560 of the present embodiment are both set forward.

The low beam LED light source 510 of this embodiment includes a plurality of high power patch LEDs, which are uniformly distributed in a row.

The low beam LED light source 510 of this embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 560 of this embodiment includes a plurality of bulb LEDs or flat head LEDs, which are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 510 and the light blocking sheet 520, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 550 of the present embodiment is a projection objective 551 for low beam, and the lower half of the compound lens 550 is a condenser lens for high beam.

The projection objective 551 of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 552.

The number of lenslets 552 of this embodiment is 3.

The lenslets 552 of this embodiment are circular total reflection collimating lenses of symmetrical light distribution.

Preferably, the outer reflecting surface of the circular total reflection collimating lens is a scale surface.

Preferably, a counter bore is formed in the center of the surface of the scale, a plano-convex lens 5521 is arranged in the counter bore, the bottom of the plano-convex lens 5521 is subjected to micro-lens array treatment, the plano-convex lens 5521 is used for mixing light in a small angle range after the middle light rays are collimated, and meanwhile, square light spots projected by a high beam LED light source 560 are mixed into round light spots, and after the round total reflection collimating lens is used for distributing light and mixing light, the high beam forms a round converging light spot with a narrow angle and uniform color temperature.

For LEDs with thinner fluorescent powder coating, after the LED is collimated by a circular total reflection collimating lens with a smooth reflecting surface, the center and the edge of a converging light spot are easy to generate the phenomenon of uneven color temperature, namely the phenomenon that the center of the light spot is bluish white and the edge of the light spot is yellowish, and the visual effect of high beam is influenced. To solve this problem, the embodiment scales the outer reflecting surface of the circular total reflection collimating lens for high beam to form a narrow-angle light spot with uniform color temperature. In addition, a counter bore is further disposed in the middle of the circular total reflection collimating lens in this embodiment, a plano-convex lens 5521 is disposed in the middle of the counter bore, and a micro-lens array is also disposed at the bottom of the plano-convex lens 5521, which is used for mixing light within a small angle range after the middle light is collimated, and meanwhile, square light spots projected by the high beam LED light source 560 are mixed into circular light spots.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 520 is located at the front focal position of the projection objective 551, the light blocking sheet 520 intercepts a single row of low beam LED light sources 510, blocks a part of light emitted by the low beam LED light sources 510, forms a cut-off line with clear brightness at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 551.

The light distribution principle of the high beam function of this embodiment is: the vertical section and the horizontal section of the circular total reflection collimating lens are all collimated light distribution to the high beam LED light source 560, the circular total reflection collimating lens collimates all incident light rays, and after the light distribution of the circular total reflection collimating lens, the high beam forms a circular narrow-angle converging light spot.

Example 6

As shown in fig. 36 to 39, an LED automotive headlamp module with high-low beam function of the present embodiment includes a radiator 680, a low beam LED light source 610, a high beam LED light source 660, a light blocking sheet 620 and a compound lens 650, wherein the low beam LED light source 610, the high beam LED light source 660, the light blocking sheet 620 and the compound lens 650 are respectively fixedly connected with the radiator 680, the low beam LED light source 610 is disposed at the upper rear portion of the radiator 680, the high beam LED light source 660 is disposed at the lower front portion of the radiator 680, the light blocking sheet 620 is disposed at the right front portion of the low beam LED light source 610, the upper portion of the compound lens 650 is disposed at the right front portion of the light blocking sheet 620, and the lower portion of the compound lens 650 is disposed at the right front portion of the high beam LED light source 660.

The heat sink 680 of the present embodiment is fixedly connected with a fixing base 630, the compound lens 650 is fixedly connected with the fixing base 630, the fixing base 630 is screwed with a lens barrel, and the compound lens 650 is fixedly connected with the lens barrel. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 650.

A heat radiation fan 670 is fixedly connected to the bottom of the heat sink 680 of the present embodiment. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 620 of this embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 620 of the present embodiment protrudes toward the low beam LED light source 610.

The irradiation direction of the low beam LED light source 610 and the irradiation direction of the high beam LED light source 660 of this embodiment are both set forward.

The low beam LED light source 610 of this embodiment includes a plurality of high power patch LEDs that are uniformly distributed in a row.

The low beam LED light source 610 of this embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 660 of this embodiment includes a plurality of bulb LEDs or flat head LEDs, which are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 610 and the light blocking sheet 620, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 650 of the present embodiment is a projection objective 651 for low beam, and the lower half of the compound lens 650 is a condenser lens for high beam.

The projection objective 651 of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 652.

The number of lenslets 652 of this embodiment is 3.

The lenslets 652 of this embodiment are fresnel collimating lenses.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 620 is located at the front focal position of the projection objective 651, the light blocking sheet 620 intercepts a single row of low beam LED light sources 610, blocks a part of light emitted by the low beam LED light sources 610, forms a cut-off line with clear brightness at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 651.

The light distribution principle of the high beam function of this embodiment is: the vertical section and the horizontal section of the fresnel collimating lens are all collimated light for the light distribution of the high beam LED light source 660, the fresnel collimating lens collimates all incident light, and after the light distribution of the fresnel collimating lens, the high beam forms a circular narrow-angle converging spot.

Example 7

As shown in fig. 40 to 44, an LED automotive headlamp module with high-low beam function of the present embodiment includes a radiator 780, a low beam LED light source 710, a high beam LED light source 760, a light blocking sheet 720 and a compound lens 750, wherein the low beam LED light source 710, the high beam LED light source 760, the light blocking sheet 720 and the compound lens 750 are respectively fixedly connected with the radiator 780, the low beam LED light source 710 is disposed at the upper rear portion of the radiator 780, the high beam LED light source 760 is disposed at the lower front portion of the radiator 780, the light blocking sheet 720 is disposed at the right front portion of the low beam LED light source 710, the upper portion of the compound lens 750 is disposed at the right front portion of the light blocking sheet 720, and the lower portion of the compound lens 750 is disposed at the right front portion of the high beam LED light source 760.

The radiator 780 of the present embodiment is fixedly connected with a fixing base 730, the compound lens 750 is fixedly connected with the fixing base 730, the fixing base 730 is screwed with a lens barrel, and the compound lens 750 is fixedly connected with the lens barrel. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 750.

A heat radiation fan 770 is fixedly connected to the bottom of the heat sink 780 of the present embodiment. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 720 of this embodiment includes a first straight sheet, a first arc sheet, a second arc sheet, and a second straight sheet integrally formed in sequence from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 720 of the present embodiment protrudes toward the low-beam LED light source 710.

The irradiation direction of the low beam LED light source 710 and the irradiation direction of the high beam LED light source 760 of the present embodiment are both set forward.

The low beam LED light source 710 of this embodiment includes a plurality of high power patch LEDs, which are uniformly distributed in a row.

The low beam LED light source 710 of this embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 760 of this embodiment includes a plurality of bulb LEDs or flat head LEDs, which are equidistantly arranged. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 710 and the light blocking sheet 720, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 750 of the present embodiment is a projection objective 751 for low beam, and the lower half of the compound lens 750 is a condenser lens for high beam.

The projection objective 751 of this embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 752.

The number of lenslets 752 of this embodiment is 3.

The lenslet 752 of this embodiment is a circular total reflection collimating lens with symmetrical light distribution, the vertical section and the horizontal section of which are all collimated light distribution for the high beam LED light source 760, the circular total reflection collimating lens collimates all incident light, and after the light distribution by the circular total reflection collimating lens, the high beam forms a circular narrow-angle converging light spot.

The condensing lens of the embodiment further includes a cylindrical lens array 753,3 circular total reflection collimating lenses disposed opposite to the cylindrical lens array.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 720 is located at the front focal position of the projection objective 751, the light blocking sheet 720 intercepts a single row of low beam LED light sources 710, blocks a part of light emitted by the low beam LED light sources 710, forms a cut-off line with a clear shade at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 751.

The light distribution principle of the high beam function of this embodiment is: the circular total reflection collimating lens collimates the light rays incident by the high beam LED light source 760, the cylindrical lens array 753 expands the light rays collimated by the circular total reflection collimating lens along the horizontal direction by an angle of θ5, and the angle of θ5 is 20-30 degrees, so that the expanded high beam forms an oblate narrow-angle converging light spot. The arc surface of the cylindrical lens array 753 arranged in front of the circular total reflection collimating lens crossly converges the light beams collimated by the circular total reflection collimating lens along the horizontal direction to form an expansion of an angle theta 5, and the expanded high beam forms an oblate narrow-angle converging light spot; preferably, θ5 is 24 degrees.

Example 8

As shown in fig. 45 and 46, an LED automotive headlamp module with high-low beam function of the present embodiment includes a radiator 880, a low beam LED light source 810, a high beam LED light source 860, a light blocking sheet 820 and a compound lens 850, wherein the low beam LED light source 810, the high beam LED light source 860, the light blocking sheet 820 and the compound lens 850 are fixedly connected to the radiator 880, the low beam LED light source 810 is disposed at the upper rear portion of the radiator 880, the high beam LED light source 860 is disposed at the lower front portion of the radiator 880, the light blocking sheet 820 is disposed at the right front of the low beam LED light source 810, the upper portion of the compound lens 850 is disposed at the right front of the light blocking sheet 820, and the lower portion of the compound lens 850 is disposed at the right front of the high beam LED light source 860.

The radiator 880 of the present embodiment is fixedly connected with a fixed base 830, the compound lens 850 is fixedly connected with the fixed base 830, the fixed base 830 is screwed with a lens barrel 840, and the compound lens 850 is fixedly connected with the lens barrel 840. The arrangement is simple in structure, easy to mold, good in structural stability, and convenient to assemble and fix the compound lens 850.

A heat radiation fan 870 is fixedly connected to the bottom of the heat radiator 880 of the present embodiment. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet 820 of the present embodiment includes a first straight sheet, a first arc-shaped sheet, a second arc-shaped sheet, and a second straight sheet integrally formed in this order from left to right. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet 820 of the present embodiment protrudes toward the low beam LED light source 810.

The irradiation direction of the low beam LED light source 810 and the irradiation direction of the high beam LED light source 860 are both set forward.

Since the projection objective only images the light spot of the upper half of the light-blocking sheet 820, a secondary optical lens 811 is disposed between the low beam LED light source 810 and the light-blocking sheet 820, the secondary optical lens 811 deflects the light emitted from the low beam LED light source 810 toward the direction above the light-blocking sheet 820, and at the same time, condenses the light beam to a certain extent, and ensures that the condensed light spot is at the position where the light-blocking sheet 820 intercepts the light, and the condensed and deflected light beam intercepts the light through the light-blocking sheet 820, and then forms a low beam light spot with a clear cut-off after being projected by the compound lens 850.

The secondary optical lens 811 of this embodiment is an off-axis free-form cylindrical lens or a light guide column.

The low beam LED light source 810 of this embodiment includes a plurality of high power patch LEDs, which are uniformly distributed in a row.

The low beam LED light source 810 of this embodiment is a COB integrated light source module type LED in a long strip shape.

The high beam LED light source 860 of the present embodiment includes a plurality of bulb LEDs or flat head LEDs, and the plurality of bulb LEDs or flat head LEDs are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low beam LED light source 810 and the light blocking sheet 820, and the light mixing distance is 5-15 mm.

The upper half of the compound lens 850 of the present embodiment is a projection objective 851 for low beam, and the lower half of the compound lens 850 is a condenser lens for high beam.

The projection objective 851 of this embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets 852.

The number of lenslets 852 in this embodiment is 3.

The lenslet 852 of this embodiment is a free-form convex lens with different horizontal and vertical light distribution angles, the vertical direction collimates the high beam LED light source 860, the horizontal direction expands the high beam LED light source 860 by a certain angle, the horizontal light distribution angle is θ1, and θ1 is 20-30 degrees.

Preferably, θ1 is 24 degrees.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet 820 is located at the front focal position of the projection objective 851, the light blocking sheet 820 intercepts a single row of low beam LED light sources 810, blocks a part of light emitted by the low beam LED light sources 810, forms a cut-off line with clear brightness at a horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective 851.

The light distribution principle of the high beam function of this embodiment is: the 3 free-form surface convex lenses perform collimation and light distribution on the high-beam LED light source 860 in the vertical direction, the high-beam LED light source 860 is expanded by a certain angle in the horizontal direction, and the light distribution angle in the horizontal direction is theta 1, and the theta 1 is 20-30 degrees; preferably, θ1 is 24 degrees; after the light is distributed by the free-form convex lens, the high beam forms a narrow-angle oblate convergent light spot.

Example 9

The LED automobile headlamp module with the high beam and low beam functions comprises a radiator, a low beam LED light source, a high beam LED light source, a light blocking piece and a compound lens, wherein the low beam LED light source, the high beam LED light source, the light blocking piece and the compound lens are respectively and fixedly connected with the radiator, the low beam LED light source is arranged at the upper rear part of the radiator, the high beam LED light source is arranged at the lower front part of the radiator, the light blocking piece is arranged right in front of the low beam LED light source, the upper part of the compound lens is arranged right in front of the light blocking piece, and the lower part of the compound lens is arranged right in front of the high beam LED light source.

The radiator of this embodiment is fixedly connected with fixing base, compound lens with fixing base fixed connection, fixing base spiro union has the lens cone, compound lens with lens cone fixed connection. The structure is simple, the molding is easy, the structural stability is good, and the assembly and the fixing of the compound lens are convenient.

The bottom of the radiator of the embodiment is fixedly connected with a cooling fan. This setting simple structure, easily shaping can improve the radiating efficiency of LED automobile headlamp module, and the practicality is good.

The light blocking sheet of this embodiment includes from left to right integrated into one piece's first straight piece, first arc piece, second arc piece and second straight piece in proper order. The first arc-shaped sheet and the second arc-shaped sheet are used for correcting the problem that the cut-off line in the projection light spot is bent due to the distortion of the projection objective.

The slope of the ramp of this embodiment is 45 degrees.

The light blocking sheet of the present embodiment protrudes toward the low beam LED light source.

The irradiation direction of the low beam LED light source and the irradiation direction of the high beam LED light source in this embodiment are both set forward.

Because the projection objective only images the light spot of the upper half part of the light interception by the light blocking sheet, a secondary optical lens is arranged between the low beam LED light source and the light blocking sheet, the secondary optical lens deflects the light emitted by the low beam LED light source to the direction above the light blocking sheet, and simultaneously converges the light beam to a certain extent, and ensures that the converged light spot is at the position of the light interception by the light blocking sheet, which is the position with the strongest light intensity, the converged and deflected light beam intercepts the light through the light blocking sheet, and the converged and deflected light beam forms the low beam light spot with clear cut-off after being projected by the compound lens.

The secondary optical lens of the embodiment is an off-axis free-form surface cylindrical mirror and a light guide column.

The low-beam LED light source of the embodiment comprises a plurality of high-power patch LEDs which are uniformly distributed in rows.

The low beam LED light source of this embodiment is a long strip COB integrated light source module type LED.

The high beam LED light source of the embodiment comprises a plurality of bulb LEDs or flat head LEDs, and the bulb LEDs or the flat head LEDs are equidistantly arranged at intervals. Preferably, the number of bulb LEDs or flat head LEDs is 3, and the distance between the bulb LEDs or flat head LEDs is 20 mm.

A light mixing distance is arranged between the low-beam LED light source and the light blocking sheet, and the light mixing distance is 5-15 mm.

The upper half of the compound lens of the embodiment is a projection objective for low beam, and the lower half of the compound lens is a condenser lens for high beam.

The projection objective of the present embodiment is a large convex lens.

The condensing lens of the present embodiment includes a plurality of lenslets.

The number of lenslets in this embodiment is 3.

The lenslets in the embodiment are free-form convex lenses with different horizontal and vertical light distribution angles, the high beam LED light source is collimated and distributed in the vertical direction, the high beam LED light source is expanded by a certain angle in the horizontal direction, the light distribution angle in the horizontal direction is theta 1, and the theta 1 is 20-30 degrees.

Preferably, θ1 is 24 degrees.

The color difference of the projection light spot is formed because: when the color rendering index of the low beam LED light source is poor and the color temperature is uneven, the projection objective lens is relatively convex, aberration correction is not in place, and blue phenomenon can occur at the position near the cut-off line of the projected low beam light spot. In this case, the projection objective of the present embodiment is a binary optical diffraction curved surface, which is used to generate a chromatic aberration opposite to the projection objective, so as to correct the blue chromatic aberration problem at the position near the cutoff of the projected low beam spot.

Preferably, the convex surface or the plane of the projection objective is engraved with a ring-shaped stepped grating microstructure, and the ring-shaped stepped grating microstructure can effectively correct chromatic aberration of a projection light spot.

The light distribution principle of the low beam function of this embodiment is: the light blocking sheet is positioned at the front focus position of the projection objective, the light blocking sheet intercepts a single row of low beam LED light sources, blocks a part of light rays emitted by the low beam LED light sources, forms a cut-off line with clear brightness at the horizontal line position, and forms a low beam light spot meeting traffic regulations at a distance after being projected by the projection objective.

The light distribution principle of the high beam function of this embodiment is: the 3 free-form surface convex lenses perform collimation and light distribution on the high-beam LED light source in the vertical direction, the high-beam LED light source is expanded by a certain angle in the horizontal direction, and the light distribution angle in the horizontal direction is theta 1, and the theta 1 is 20-30 degrees; preferably, θ1 is 24 degrees; after the light is distributed by the free-form convex lens, the high beam forms a narrow-angle oblate convergent light spot.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An LED automobile headlamp module with far and near light function, which is characterized in that: including radiator, low beam LED light source, far beam LED light source, light blocking piece and compound lens, the low beam LED light source far beam LED light source the light blocking piece with compound lens respectively with radiator fixed connection, the low beam LED light source is located the last rear portion of radiator, the far beam LED light source is located the lower front portion of radiator, the light blocking piece is located the place ahead of low beam LED light source, the upper portion of compound lens is located the place ahead of light blocking piece, the lower part of compound lens is located the place ahead of far beam LED light source, radiator fixedly connected with fixing base, compound lens with fixing base fixed connection, fixing base spiro union has the lens, compound lens with lens barrel fixed connection, the bottom fixedly connected with radiator fan of radiator, the light blocking piece is including from left to right integrated into one piece's first straight piece, first arc piece, second arc piece and second straight piece, the first straight piece highly equal with the height of light blocking piece, the second straight piece highly equal with the arc-shaped light source is equipped with the slope, the high angle of light blocking piece is equipped with the arc-shaped light source is connected with the slope, the light blocking piece is highly equal to 45 the arc-shaped light source.

2. The LED automotive headlamp module with high and low beam functions according to claim 1, wherein: the light beam is focused to a certain extent by the secondary optical lens, and the focused light spot is ensured to be at the position with the strongest light intensity at the position of the light blocking sheet interception, and the focused and deflected light beam intercepts through the light blocking sheet and forms a low beam light spot with clear cut-off after being projected by the composite lens.

3. The LED automotive headlamp module with high and low beam functions according to claim 2, wherein: the secondary optical lens is an off-axis free-form surface cylindrical mirror and a light guide column.

4. A LED automotive headlamp module with high and low beam functions according to claim 1 or 3, characterized in that: the low-beam LED light source comprises a plurality of high-power patch LEDs which are uniformly distributed in rows.

5. The LED automotive headlamp module with high and low beam functions according to claim 4, wherein: the number of the high-power patch LEDs is 12, the arrangement mode of the high-power patch LEDs is that 3 groups of the high-power patch LEDs are connected in series, and 4 groups of the high-power patch LEDs are connected in parallel and are arranged into a linear light source.

6. A LED automotive headlamp module with high and low beam functions according to claim 3, wherein: the low-beam LED light source is a strip-shaped COB integrated light source module type LED.

7. The LED automotive headlamp module with high and low beam functions according to claim 5 or 6, wherein: the high beam LED light source comprises a plurality of bulb LEDs or flat head LEDs, and the bulb LEDs or the flat head LEDs are equidistantly arranged at intervals.

8. The LED automotive headlamp module with high and low beam functions of claim 7, wherein: a light mixing distance is arranged between the low beam LED light source and the light blocking sheet, and the light mixing distance is 5-15 mm.

9. The LED automotive headlamp module with high and low beam functions of claim 8, wherein: the upper half part of the compound lens is a projection objective lens for low beam, and the lower half part of the compound lens is a condensing lens for high beam.

10. The LED automotive headlamp module with high and low beam functions of claim 9, wherein: the projection objective is a large convex lens.

11. The LED automotive headlamp module with high and low beam functions of claim 10, wherein: the condensing lens includes a plurality of lenslets.

12. The LED automotive headlamp module with high and low beam functions of claim 11, wherein: the number of the lenslets is 3.

13. The LED automotive headlamp module with high and low beam functions of claim 12, wherein: the small lens is a free-form surface convex lens with different light distribution angles in the horizontal direction and the vertical direction, the high beam LED light source is collimated and distributed in the vertical direction, the high beam LED light source is expanded by a certain angle in the horizontal direction, and the light distribution angle in the horizontal direction is theta 1, and the theta 1 is 20-30 degrees.

14. The LED automotive headlamp module with high and low beam functions of claim 13, wherein: θ1 is 24 degrees.

15. The LED automotive headlamp module with high and low beam functions of claim 12, wherein: the small lens is a free-form surface total reflection condensing lens with different light distribution angles in the horizontal direction and the vertical direction, the high beam LED light source is collimated and distributed in the vertical direction, and the high beam LED light source is expanded by a certain angle in the horizontal direction.

16. The LED automotive headlamp module with high and low beam functions of claim 15, wherein: the refraction part in the middle of the free-form surface total reflection condensing lens and the total reflection part on the side face collimate all incident light, the horizontal section of the free-form surface total reflection condensing lens expands the light distribution of a certain angle for the high beam LED light source, the light distribution angle is theta 2, the refraction part in the middle of the free-form surface total reflection condensing lens directly diffuses the light beam, the diffusion angle is theta 3, the total reflection part on the side face of the free-form surface total reflection condensing lens crossly converges the incident light beam inwards, and diffuses again after converging, the diffusion angle is theta 4, and the diffusion angle is theta 4-30 degrees.

17. The LED automotive headlamp module with high and low beam functions of claim 16, wherein: θ4 is 24 degrees.

18. The LED automotive headlamp module with high and low beam functions of claim 12, wherein: the small lenses are round aspheric convex lenses with the same horizontal and vertical light distribution angles, the vertical section and the horizontal section of the round aspheric convex lenses are all collimated light distribution, the round aspheric convex lenses collimate all incident light rays, and after the light distribution of the round aspheric convex lenses, the high beam forms a round narrow-angle converging light spot.

19. The LED automotive headlamp module with high and low beam functions of claim 12, wherein: the small lenses are circular total reflection collimating lenses with symmetrical light distribution, the vertical section and the horizontal section of the small lenses are all collimated light distribution for the high beam LED light source, the circular total reflection collimating lenses collimate all incident light rays, and after the light distribution of the circular total reflection collimating lenses, the high beam forms a circular narrow-angle converging light spot.

20. The LED automotive headlamp module with high and low beam functions of claim 19, wherein: the outer reflecting surface of the circular total reflection collimating lens is a scale surface.

21. The LED automotive headlamp module with high and low beam functions of claim 20, wherein: the center of the surface of the scale is provided with a counter bore, a plano-convex lens is arranged in the counter bore, the bottom of the plano-convex lens is subjected to micro-lens array treatment, the plano-convex lens is used for mixing light in a small angle range after intermediate light is collimated, meanwhile, square light spots projected by a high beam LED light source are mixed into round light spots, and after the round total reflection collimating lens is used for distributing light and mixing light, the high beam forms a round converging light spot with a narrow angle and uniform color temperature.

22. The LED automotive headlamp module with high and low beam functions of claim 12, wherein: the small lenses are Fresnel collimating lenses, the vertical section and the horizontal section of the Fresnel collimating lenses are all collimated light distribution, the Fresnel collimating lenses collimate all incident light rays, and after the Fresnel collimating lenses distribute the light, the high beam forms a circular narrow-angle converging light spot.

23. The LED automotive headlamp module with high and low beam functions of claim 19, wherein: the condensing lens further comprises a cylindrical lens array, and the 3 circular total reflection collimating lenses are arranged opposite to the cylindrical lens array.

24. The LED automotive headlamp module with high and low beam functions of claim 23, wherein: the circular total reflection collimating lens collimates the light rays incident by the high beam LED light source, the cylindrical lens array expands the light rays collimated by the circular total reflection collimating lens along the horizontal direction by an angle theta 5, the theta 5 is 20-30 degrees, and the expanded high beam forms an oblate narrow-angle converging light spot.

25. The LED automotive headlamp module with high and low beam functions according to any one of claims 14, 17, 18, 19, 20, 22 or 24, wherein: the projection objective is a binary optical diffraction curved surface, and the binary optical diffraction curved surface is used for generating chromatic aberration opposite to the projection objective, so that the blue chromatic aberration problem of the position near the cut-off line of the projected dipped beam light spot is corrected.

26. The LED automotive headlamp module with high and low beam functions of claim 25, wherein: the convex surface or the plane of the projection objective is carved with a ring-shaped step-shaped grating microstructure which is used for correcting chromatic aberration of projection light spots.