CN114659067A

CN114659067A - Projection type dipped beam module for vehicle

Info

Publication number: CN114659067A
Application number: CN202210317416.0A
Authority: CN
Inventors: 赵志强
Original assignee: Zhenjiang Jinghui Precision Machinery Co ltd
Current assignee: Zhenjiang Jinghui Precision Machinery Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-06-24

Abstract

The invention provides a projection type dipped beam module for a vehicle, which comprises an optical lens, a reflector and an LED light source assembly, wherein the LED light source assembly comprises a plurality of LED light sources which are arranged in a straight line shape; the reflecting surface is arranged above the LED light source, the LED light source is positioned at the focus of the reflecting surface, the optical unit is arranged in front of the reflecting surface, and the root edge of the reflecting surface is positioned on or near the focus of the optical unit; light rays provided by the LED light sources are reflected to form light beams with cut-off lines through the reflecting surface, and the light beams form low-beam light types through the optical unit. According to the invention, a light and shade cut-off line forming part is not required to be installed, so that the occupied space of the low beam module can be greatly reduced, and the problems of the existing low beam module can be effectively solved.

Description

Projection type dipped beam module for vehicle

Technical Field

The invention relates to the technical field of automobile lamps, in particular to a projection type dipped beam module for an automobile.

Background

The existing automobile lamp mostly adopts a halogen bulb or a xenon lamp as a luminous light source, and has the defects of high energy consumption, high heat productivity and higher requirements on materials of peripheral parts; the xenon lamp element has large volume, is not beneficial to arrangement and does not meet the national energy-saving and environment-friendly requirements; moreover, the lighting speed of the bulb is low, the service life is short, and particularly, the light is dim after the halogen lamp bulb is lighted, so that visual fatigue is easily caused when the automobile is driven at night. With the rapid development of LED light source technology, the conventional halogen lamp and xenon lamp in the market will be gradually replaced.

The LED modules on the market at present comprise a single-function module and a dual-function module, wherein the single-function module comprises a near light module and a high beam module, the near light module can only provide a near light function, and the high beam module can only provide a high beam function; when a low-beam module with the existing structure provides a low-beam function, light emitted by an LED light source is lightened to be matched with a cut-off line forming piece to form a light beam with a cut-off line, and then the light beam is emitted through a lens to form a low-beam light beam; at present, because the lamp design space given to a lamp designer by a car factory is smaller and smaller, the lamp designer needs to reduce the space occupation of each part in the lamp, and the low beam module structure which needs to be provided with a cut-off line forming part in the low beam module can not be adapted.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a projection type dipped beam module for a vehicle, which can effectively solve the problems in the prior art.

The invention is realized by the following technical scheme:

a projection type dipped beam module for a vehicle comprises optical lenses, reflectors and LED light source assemblies, wherein the LED light source assemblies comprise a plurality of LED light sources which are arranged in a straight line, each reflector comprises a corresponding reflecting surface, the root edges of the reflecting surfaces are arranged into a light and dark cut-off line shape, and each optical lens comprises a corresponding optical unit; the reflecting surface is arranged above the LED light sources, the LED light sources are located at the focal points of the reflecting surface, the optical unit is arranged in front of the reflecting surface, the root edges of the reflecting surface are located on or near the focal points of the optical unit, a plurality of light beams provided by the LED light sources are reflected by the reflecting surface to form light beams with cut-off lines, and the light beams pass through the optical unit to form low beam light types.

Further, according to the vehicular projection type dipped beam module, the optical unit comprises a light outgoing surface and a light incoming surface, both the longitudinal section line and the transverse section line of the light incoming surface are convex curves, the longitudinal section line of the light outgoing surface is a convex curve, and the transverse section line is a straight line; or the longitudinal section line and the transverse section line of the light exit surface are both convex curves, the longitudinal section line of the light entrance surface is a convex curve, and the transverse section line of the light entrance surface is a straight line; or the longitudinal section lines and the transverse section lines of the light incident surface and the light emergent surface are both convex curves.

Further, according to the vehicular projection type low beam module, the longitudinal section line of the light emitting surface comprises an upper end point, an inflection point and a lower end point, the transverse distance between the upper end point and the inflection point is larger than the transverse distance between the lower end point and the inflection point, and the longitudinal distance between the upper end point and the inflection point is larger than the longitudinal distance between the lower end point and the inflection point.

Further, according to the vehicular projection type low beam module, the light emitting central axis of the LED light source and the optical axis of the low beam form an included angle a, and the included angle a is set to be 70-80 °.

Further, according to the vehicular projective low beam module of the present invention, the root edge of the reflection surface includes a first edge, a second edge, and a third edge, the first edge, the second edge being parallel to the horizontal reference axis, the first edge being higher than the second edge such that the third edge connected between the first edge and the second edge is inclined at a set angle for forming a 15 ° or 45 ° rising area in the low beam type distribution; the first edge comprises a fourth edge, a fifth edge and a sixth edge, the first edge is connected with the third edge through the fourth edge, the fifth edge is lower than the fourth edge, the sixth edge connected between the fourth edge and the fifth edge is inclined at a set angle, so that the irradiation range of the low beam type distribution right in front of a driver is expanded upwards by 0.1-0.2 degrees to obtain an expanded area, a U-shaped structure area is formed between the expanded area and the rising area, and the opening of the U-shaped structure area is positioned in the range from 4 degrees left to 0 degrees right of a horizontal reference axis.

Further, according to the vehicular projection type dipped beam module, the light isolating sheet is arranged between every two adjacent optical units and used for blocking the light rays emitted by the LED light sources which are not corresponding to the optical units.

Further, according to the vehicular projection type dipped beam module, the reflector is provided with an extension surface at the rear end of the reflection surface, the rear end of the extension surface is provided with a III-region light supplementing surface extending downwards, and the III-region light supplementing surface is used for reflecting a small part of light emitted by the LED light source to a III region in dipped beam type distribution for supplementing the light.

Further, according to the vehicular projection type low beam module, the plurality of LED light sources arranged in a line shape include at least one first LED light source, at least one second LED light source and at least one third LED light source, and the first LED light sources, the corresponding reflecting surfaces and the corresponding optical units are matched to provide light types with low beam light types distributed in the range from 20 degrees left to 20 degrees right of the horizontal reference axis; the second LED light source with correspond plane of reflection, the cooperation of optical unit provide the light type that the low beam light type distributes in horizontal reference axis left 10 to the right 40 within ranges, the third LED light source with correspond plane of reflection, the cooperation of optical unit provide the light type that the low beam light type distributes in horizontal reference axis left 40 to the right 10 within ranges.

Further, according to the projection type dipped beam module for a vehicle of the invention, the second LED light source is located at the left side of the third LED light source, and the light incident surface of the optical unit corresponding to the second LED light source and the light incident surface of the optical unit corresponding to the third LED light source are symmetrical in structure and connected to each other in a W-like shape.

Furthermore, according to the projection type low beam module for the vehicle, the plurality of LED light sources arranged in the shape of a straight line further include at least one fourth LED light source, and the fourth LED light source is matched with the corresponding reflection surface and the optical unit to provide light types with low beam light types distributed in the range from 40 degrees to 40 degrees on the left of the horizontal reference axis.

The invention has simple structure and convenient installation, can avoid installing a light and shade cut-off line forming part, thus greatly reducing the occupied space of the dipped beam module and effectively solving the problems of the prior dipped beam module.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cut-away view A-A of FIG. 1;

FIG. 3 is a schematic view of the structure of the reflecting surface of the present invention;

FIG. 4 is a diagram of a first LED light source in cooperation with a corresponding reflective surface and optical unit to provide low beam patterns in the range of 20 ° left to 20 ° right of the H-H line;

FIG. 5 is a diagram of a second LED light source in cooperation with a corresponding reflective surface and optical unit to provide low beam distribution in the range of 10 ° left to 40 ° right of the H-H line in accordance with the present invention;

FIG. 6 is a diagram of a third LED light source of the present invention cooperating with a corresponding reflective surface and optical unit to provide a low beam pattern in the range of about 40 to about 10 of the H-H line;

FIG. 7 is a diagram of a fourth LED light source of the present invention cooperating with a corresponding reflective surface and optical unit to provide low beam patterns in the range of 40 ° left to 40 ° right of the H-H line;

FIG. 8 is a low beam profile provided by the present invention;

FIG. 9 is a schematic perspective view of an embodiment of the present invention;

FIG. 10 is an exploded view of FIG. 9;

FIG. 11 is a schematic view of the embodiment provided in FIG. 9 without the heat sink base;

FIG. 12 is a cut-away view of B-B in FIG. 11;

FIG. 13 is a schematic diagram of an arrangement of eight LED light sources and corresponding reflective surfaces and optical units in the embodiment of FIG. 9;

FIG. 14 is a low beam profile provided by the embodiment provided in FIG. 9;

fig. 15 is a schematic view of the structure of fig. 11 with a light barrier.

In the figure:

1 is an optical lens, 11 is an optical unit, 111 is a light-out surface, and 112 is a light-in surface;

2 is a mirror, 21 is a reflection surface, 211 is a root edge, 2111 is a first edge, 21111 is a fourth edge, 21112 is a fifth edge, 21113 is a sixth edge, 2112 is a second edge, 2113 is a third edge, 22 is a holding surface, 23 is an extension surface, 24 is a iii-zone light-compensating surface, 25 is a mounting foot, 251 is a mounting hole, and 26 is a light-isolating sheet;

3 is an LED light source assembly, 31 is an LED light source, 311 is a first LED light source, 312 is a second LED light source, 313 is a third LED light source, 314 is a fourth LED light source, 32 is a circuit board, and 33 is a connector;

4 is luminous center pin, 5 is the optical axis, 6 is the heat dissipation base, 61 is the heat dissipation tooth, 62 is first installation face, 63 is the second installation face, 7 is first limit structure, 71 is participating in, 72 is the slot, 8 is the second limit structure, 81 is spacing post, 82 is spacing hole, 9 is the third limit structure.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a vehicular projection-type low-beam module includes an optical lens 1, a reflector 2 and an LED light source assembly 3, where the LED light source assembly 3 includes a plurality of LED light sources 31 arranged in a straight line, the reflector 2 includes a corresponding reflective surface 21, a root edge 211 of the reflective surface 21 is set to be in a cut-off line shape, and the optical lens 1 includes a corresponding optical unit 11; the reflecting surface 21 is disposed above the LED light source 31, and the LED light source 31 is located at a focal point of the reflecting surface 21, the optical unit 11 is disposed in front of the reflecting surface 21, and the root edge 211 of the reflecting surface 21 is located at or near the focal point of the optical unit 11, preferably at the focal point, light provided by the plurality of LED light source assemblies 3 is reflected by the reflector 2 to form a light beam with a cut-off line, and the light beam passes through the optical lens 1 to form a low beam type.

Further, the optical unit 11 includes a light exit surface 111 and a light entrance surface 112, both a longitudinal section line and a transverse section line of the light entrance surface 112 are convex curves, the longitudinal section line of the light exit surface 111 is a convex curve, and the transverse section line thereof is a straight line; specifically, the light incident surface 112 is a convex curved surface, which may be a spherical surface, a convex aspheric surface, or a convex free curved surface, preferably an aspheric surface, and the size of the diffusion angle of the entering light is adjusted by changing the curvature of the light incident surface 112, wherein the larger the curvature is, the larger the diffusion angle is, and conversely, the smaller the curvature is, the smaller the diffusion angle is; the light-emitting surface 111 is a free-form surface formed by stretching a convex curve along a straight line; of course, the longitudinal section line of the light incident surface 112 may be a convex curve, the transverse section line thereof is a straight line, and both the longitudinal section line and the transverse section line of the light emergent surface 111 are convex curves; or the longitudinal section lines and the transverse section lines of the light incident surface 112 and the light emergent surface 111 are both convex curves; in this embodiment, the light incident surface 112 is an aspheric surface, and the light emitting surface 111 is a free-form surface; the longitudinal section line of the light exit surface 111 comprises an upper end point, an inflection point and a lower end point, the transverse distance between the upper end point and the inflection point is larger than the transverse distance between the lower end point and the inflection point, and the longitudinal distance between the upper end point and the inflection point is larger than the longitudinal distance between the lower end point and the inflection point, so that the light exiting from the light exit surface 111 is prevented from being excessively condensed, and the dipped beam shape is more uniform.

In addition, in order to prevent the iii region in the low beam light type distribution from being too dark, the reflector 2 is provided with an extension surface 23 at the rear end of the reflecting surface 21, the extension surface 23 is a surface which horizontally extends backwards from the root edge 211 of the reflecting surface 21, the rear end of the extension surface 23 is also provided with a iii region light supplementing surface 24 which extends downwards, the extension surface 23 blocks light, the light emitted by the LED light source 31 is prevented from leaking outwards in a large amount, a small part of light is reflected to the iii region through the iii region light supplementing surface 24, and light supplementation is performed on the iii region; specifically, the included angle b formed by the light supplementing surface 24 in the region iii and the optical axis 5 is greater than 90 degrees, preferably 95 degrees, and excessive reflection light is avoided by enlarging the angle diffusion reflection light, and certainly, the reflection effect can also be reduced by weakening the reflectivity of the light supplementing surface 24 in the region iii.

Further, the light emitting central axis 4 of the LED light source 31 forms an included angle a with the optical axis 5 of the low beam type, the range value of the included angle a is set to 70-80 °, and 70 ° is preferable, so that the LED light source 31 can provide sufficient effective light to the reflection surface 21, and simultaneously can provide a small part of light to the iii-region light compensation surface 24 behind the reflection surface 21.

As shown in fig. 3, the reflecting surface 21 is a rotating surface having an elliptical or parabolic profile about an axis parallel to the optical axis; of course, it may be a free-form surface or a swept surface or an asymmetric surface; the root edge 211 of the reflection surface 21 includes a first edge 2111, a second edge 2112, and a third edge 2113, the first edge 2111, the second edge 2112 being parallel to a horizontal reference axis (H-H line), the first edge 2111 being higher than the second edge 2112, so that the third edge 2113 connected between the first edge 2111 and the second edge 2112 is inclined at a set angle for forming a 15 ° or 45 ° rising area in the low beam type distribution.

In addition, the first edge 2111 includes a fourth edge 21111, a fifth edge 21112 and a sixth edge 21113, the first edge 2111 is connected with the third edge 2113 through the fourth edge 21111, the fifth edge 21112 is lower than the fourth edge 21111, so that the sixth edge 21113 connected between the fourth edge 21111 and the fifth edge 21112 is inclined at a set angle, and the transition angle of the angle is an obtuse angle, which is convenient for production and processing; under the prerequisite that satisfies the grading standard, can upwards expand 0.1-0.2, preferred 0.2 with the irradiation range that the low beam light type distributes in driver dead ahead to obtain the expanded area, the low beam light type forms the U-shaped structure region between expanded area and ascending region, the opening in U-shaped structure region is located horizontal reference axis (H-H line) left 4 to the right 0 within range, through the large low beam light type irradiation range of expanded area extension, further improve the security of driving.

Further, the plurality of LED light sources 31 arranged in a line include at least one first LED light source 311, at least one second LED light source 312, and at least one third LED light source 313, the first LED light source 311, the second LED light source 312, and the third LED light source 313 are arranged in a line, the first LED light source 311 is used for providing a light pattern with low beam light type distributed in a range from 20 ° left to 20 ° right of the horizontal reference axis (H-H line) in cooperation with the corresponding reflection surface 21 and the optical unit 11, the first edge 2111 on the root edge 211 of the reflection surface 21 corresponding to the first LED light source 311 includes a fourth edge 21111, a fifth edge 21112, and a sixth edge 21113, so as to obtain an extended area, thereby forming a U-shaped structure area on the light pattern, as shown in fig. 4; the second LED light source 312 is used to cooperate with the corresponding reflection surface 21 and the optical unit 11 to provide a light pattern with low beam light pattern distributed in the range from 10 ° left to 40 ° right of the horizontal reference axis (H-H line), and the first edge 2111 on the root edge 211 of the reflection surface 21 corresponding to the second LED light source 312 may be flat, or may include a fourth edge 21111, a fifth edge 21112 and a sixth edge 21113, and is preferably flat, and does not need to form an extended area, as shown in fig. 5; the third LED light source 313 is used to cooperate with the corresponding reflection surface 21 and the optical unit 11 to provide a light pattern with low beam light pattern distributed in the range from 40 ° left to 10 ° right of the horizontal reference axis (H-H line), and the first edge 2111 on the root edge 211 of the reflection surface 21 corresponding to the third LED light source 313 includes a fourth edge 21111, a fifth edge 21112 and a sixth edge 21113 to obtain an extended area, so that a U-shaped structure area is formed on the light pattern, as shown in fig. 6; so that the LED light source assembly 3, the reflector 2 and the optical lens 1 cooperate to form a low beam pattern, that is, a pattern provided when the three LED light sources 31 operate simultaneously, as shown in fig. 7; specifically, the light incident surface 112 of the optical unit 11 corresponding to the second LED light source 312 and the light incident surface 112 of the optical unit 11 corresponding to the third LED light source 313 are symmetrical in structure, the light incident surface 112 on the optical unit 11 corresponding to the second LED light source 312 faces to the left, the light incident surface 112 on the optical unit 11 corresponding to the third LED light source 313 faces to the right, and the transverse section lines of the two optical units 11 corresponding to the second LED light source 312 and the third LED light source 313 on the optical lens 1 are in a W-like shape; the second LED light source 312 is positioned at the left side of the third LED light source 313, and the first LED light source 311 may be positioned at the left side of the second LED light source 312 or positioned at the right side of the third LED light source 313.

In order to improve the illumination intensity and uniformity of the low beam type, the plurality of LED light sources 31 arranged in a line further include a fourth LED light source 314, and the fourth LED light source 314 is disposed outside the third LED light source 313 or the first LED light source 311; the fourth LED light source 314 is used for cooperating with the corresponding reflection surface 21 and the optical unit 11 to provide a light pattern with low beam light pattern distribution in the range from 40 ° left to 40 ° right of the horizontal reference axis (H-H line); specifically, the first edge 2111 of the reflecting surface 21 corresponding to the fourth LED light source 314 on the root edge 211 is preferably flat, and does not need to form an expanded area, and only needs to increase the width illumination brightness, as shown in fig. 8; by adding the fourth LED light source 314, the overall illumination intensity of the low beam type is enhanced, and the uniformity is better.

As shown in fig. 9-13, in order to prolong the service life of the LED light source assembly 3, the LED light source assembly 3 is disposed on the heat dissipation base 6, the heat dissipation base 6 is made of aluminum, and a plurality of heat dissipation teeth 61 are disposed on the heat dissipation base, so that the heat dissipation area is increased by the heat dissipation teeth 61, and the heat dissipation efficiency is further increased; in this embodiment, the top of the heat dissipation base 6 is sequentially provided with a first mounting surface 62 and a second mounting surface 63 from front to back, the LED light source assembly 3 is arranged on the second mounting surface 63, the reflector 2 is arranged on the second mounting surface 63 and located above the LED light source assembly 3, and the optical lens 1 is fixed on the first mounting surface 62 through the reflector 2; a first limiting structure 7 is arranged between the first mounting surface 62 and the optical lens 1, the first limiting structure 7 comprises a pin 71 and a slot 72, the pin 71 can be arranged at two ends of the optical lens 1, the slot 72 can be arranged on the first mounting surface 62, the pin 71 is inserted into the slot 72 to limit the optical lens 1 on the first mounting surface 62, the reflector 2 is provided with a clamping surface 22 at the front end of the reflecting surface 21, and is provided with an extending surface 23 at the rear end of the reflecting surface 21, the extending surface 23 horizontally extends 3-6mm backwards from the root edge 211 of the reflecting surface 21, when the reflector 2 is arranged on the second mounting surface 63, the clamping surface 22 presses the optical lens 1, so that the optical lens 1 is fixed on the first mounting surface 62, and light is prevented from leaking outwards through the extending surface 23; a second limiting structure 8 is arranged between the LED light source assembly 3 and the second mounting surface 63, the LED light source assembly 3 is limited on the second mounting surface 63 through the second limiting structure 8, the second limiting structure 8 comprises a limiting column 81 and a limiting hole 82, the limiting hole 82 is arranged on the circuit board 32 on the LED light source assembly 3, the limiting column 81 is arranged on the second mounting surface 63, and the limiting column 81 is inserted into the limiting hole 82 to limit the LED light source assembly 3 on the second mounting surface 63; a third limiting structure 9 is arranged between the reflector 2 and the second mounting surface 63, and the reflector 2 is limited on the second mounting surface 63 through the third limiting structure 9, so that the relative positions of the LED light sources 31 and the corresponding reflecting surfaces 21 and the optical units 11 are ensured to be accurate and have no deviation, and the quality of the low beam light type is further improved; the LED light source assembly 3 comprises eight LED light sources 31, a circuit board 32 and a connector 33, wherein the eight LED light sources 31 are arranged on the circuit board 32 and are arranged in a straight line shape, and the connector 33 is arranged on the circuit board 32 and is used for being connected with an external power supply; the eight LED light sources 31 include three first LED light sources 311, two second LED light sources 312 and two third LED light sources 313, and one fourth LED light source 314, the arrangement structure includes eight first LED light sources 311, eight second LED light sources 314, eight second LED light sources 312, eight third LED light sources 313 and eight first LED light sources 311 from left to right, the three first LED light sources 311 are matched with the corresponding reflection surfaces 21 and the optical units 11 to improve the intensity of the light pattern with the low beam distribution in the range from 20 degrees left to 20 degrees right of the horizontal reference axis (H-H line), the two second LED light sources 312 are matched with the corresponding reflection surfaces 21 and the optical units 11 to improve the intensity of the light pattern with the low beam distribution in the range from 10 degrees left to 40 degrees right of the horizontal reference axis (H-H line), and the two third LED light sources 313 are matched with the corresponding reflection surfaces 21 and the optical units 11, The optical unit 11 is matched with the horizontal reference axis (H-H line) to provide light type illumination intensity improvement of low beam light type distribution in the range from 40 degrees left to 10 degrees right, and the light type in the range from 40 degrees left to 40 degrees right of the horizontal reference axis (H-H line) is matched with the optical unit 11 through the fourth LED light source 314 and the corresponding reflecting surface 21, so that the overall illumination intensity of the low beam light type is better and more uniform; the optical lens 1 is provided with eight corresponding optical units 11 which are arranged in a straight line, the front end face of the optical lens 1 is formed by connecting light exit surfaces 111 on the eight optical units 11, and the longitudinal section lines of the light exit surfaces 111 can be completely overlapped, so that the front end face of the optical lens 1 is a long free-form surface obtained by extending any longitudinal section line along the extension line of a straight line, and the optical lens 1 is long; the rear end face of the optical lens 1 is formed by connecting the light incident surfaces 112 on the eight optical units 11, each light incident surface 112 is an aspheric surface, and a process R angle can be arranged at the joint of every two light incident surfaces 112, so that the processing is convenient through the process R angle, and the yield is improved; in addition, the reflector 2 is provided with two mounting feet 25 extending downwards at the rear end of the extension surface 23, the end of each mounting foot 25 is provided with a mounting platform turning outwards, the mounting platform is provided with mounting holes 251, certainly, in order to enable the clamping surface 22 to better clamp the optical lens 1, the front end of the reflector 2 is also provided with two mounting holes 251, and the mounting holes 251 are used for being matched with screws to fix the reflector 2 on the heat dissipation base 6 and simultaneously fix the optical lens 1 on the heat dissipation base 6; the surface of the mounting foot 25 facing the LED light source 31 is the iii area light supplement surface 24, and the reflector 2 is an aluminum plated part, so that the reflection surface 21 and the iii area light supplement surface 24 have a reflection function through the aluminum plated layer; referring to fig. 14, the low beam pattern obtained by the present embodiment is shown in fig. 14 compared with fig. 8, and we can see that the low beam pattern has a little more faint light in the iii region above the cutoff line, which is provided by the reflection of the iii region light compensating surface 24.

As shown in fig. 15, in order to prevent the light beams emitted by two adjacent LED light sources 31 from entering each other optical unit 11 when the two adjacent LED light sources 31 are in operation, which may cause the low beam type to be uneven, an optical isolation sheet 26 may be disposed between each two adjacent optical units 11, and the optical isolation sheet 26 blocks the light beams emitted by the non-corresponding LED light sources 31 to avoid the light beams from entering each other; the light-shielding sheets 26 can be made of stainless steel, the light-shielding sheets 26 are connected with each other to form a whole, and can be stamping parts, or can be light-shielding sheets made of other high-temperature-resistant materials, and the thickness of the light-shielding sheets is preferably 0.3-0.5mm, so that the light-shielding sheets do not occupy too much space, and the utilization rate of light is ensured.

Claims

1. A projection type dipped beam module for a vehicle comprises an optical lens, a reflector and an LED light source assembly, and is characterized in that the LED light source assembly comprises a plurality of LED light sources which are arranged in a straight line shape, the reflector comprises corresponding reflecting surfaces, the root edges of the reflecting surfaces are arranged in a light and shade cut-off line shape, and the optical lens comprises corresponding optical units; the reflecting surface is arranged above the LED light sources, the LED light sources are located at the focal points of the reflecting surface, the optical unit is arranged in front of the reflecting surface, the root edges of the reflecting surface are located on or near the focal points of the optical unit, a plurality of light beams provided by the LED light sources are reflected by the reflecting surface to form light beams with cut-off lines, and the light beams pass through the optical unit to form low beam light types.

2. The vehicular projection type low beam module according to claim 1, wherein the optical unit comprises a light exit surface and a light entrance surface, the longitudinal section line and the transverse section line of the light entrance surface are both convex curves, the longitudinal section line of the light exit surface is a convex curve, and the transverse section line thereof is a straight line; or the longitudinal section line and the transverse section line of the light emergent surface are both convex curves, the longitudinal section line of the light incident surface is a convex curve, and the transverse section line is a straight line; or the longitudinal section lines and the transverse section lines of the light incident surface and the light emergent surface are both convex curves.

3. The vehicular projection type dipped beam module set according to claim 2, characterized in that the longitudinal section line of the light emergent surface comprises an upper endpoint, an inflection point and a lower endpoint, the transverse distance between the upper endpoint and the inflection point is larger than that between the lower endpoint and the inflection point, and the longitudinal distance between the upper endpoint and the inflection point is larger than that between the lower endpoint and the inflection point.

4. The vehicular projection type low beam module according to claim 1, wherein the central light emitting axis of the LED light source forms an included angle a with the optical axis of the low beam, and the included angle a is set in an angle range of 70-80 °.

5. A proj ecting low beam module for a vehicle as claimed in claim 1, wherein the root edge of the reflective surface comprises a first edge, a second edge and a third edge, the first and second edges being parallel to the horizontal reference axis, the first edge being higher than the second edge such that the third edge connecting between the first and second edges is inclined at a set angle for forming a 15 ° or 45 ° rise region in the low beam profile; the first edge comprises a fourth edge, a fifth edge and a sixth edge, the first edge is connected with the third edge through the fourth edge, the fifth edge is lower than the fourth edge, the sixth edge connected between the fourth edge and the fifth edge is inclined at a set angle, so that the irradiation range of the low beam type distribution right in front of a driver is expanded upwards by 0.1-0.2 degrees to obtain an expanded area, a U-shaped structure area is formed between the expanded area and the rising area, and the opening of the U-shaped structure area is positioned in the range from 4 degrees left to 0 degrees right of a horizontal reference axis.

6. The vehicular projective low beam module of claim 1, wherein a light-blocking sheet is disposed between every two adjacent optical units, and the light-blocking sheet is used for blocking light emitted from the LED light sources not corresponding to the optical units.

7. A vehicular projection type low beam module according to any one of claims 1 to 6, wherein the reflector is provided with an extension surface at a rear end of the reflection surface, the rear end of the extension surface is provided with a iii-region light supplement surface extending downward, and the iii-region light supplement surface is used for reflecting a small part of light emitted by the LED light source to a iii region in the low beam type distribution for supplementing the light.

8. The vehicular projection type low beam module according to claim 7, wherein the plurality of LED light sources arranged in a line include at least one first LED light source, at least one second LED light source and at least one third LED light source, and the first LED light sources, the corresponding reflecting surfaces and the corresponding optical units cooperate to provide light patterns with low beam light patterns distributed in a range from 20 ° left to 20 ° right of the horizontal reference axis; second LED light source with correspond plane of reflection, optical unit cooperation provide the light type that the low beam type distributes in horizontal reference axis left side 10 to the right 40 within ranges, third LED light source with correspond plane of reflection, optical unit cooperation provide the light type that the low beam type distributes in horizontal reference axis left side 40 to the right 10 within ranges.

9. The vehicular projection type low beam module according to claim 8, wherein the second LED light source is located on the left side of the third LED light source, and the light incident surface of the optical unit corresponding to the second LED light source is symmetrical to the light incident surface of the optical unit corresponding to the third LED light source, and the two are connected to form a W-like shape.

10. The vehicular projection type low beam module according to claim 8, wherein the plurality of LED light sources arranged in a line further include at least one fourth LED light source, and the fourth LED light source is matched with the corresponding reflection surface and the optical unit to provide a light pattern with a low beam light pattern distributed in a range from 40 ° to 40 ° on the left of the horizontal reference axis.