Optical unit capable of eliminating black line at joint of high beam and low beam and optical module thereof

Abstract

An optical module comprises an optical unit, the optical unit comprises a lens, an LED circuit board, a condenser and a light and shade cut-off line forming part, light emitted by a low-beam light source is emitted out through a low-beam condensation part to form a first light beam, and the first light beam is shielded by the light and shade cut-off forming part to form a light beam with a light and shade cut-off line. The light beam with the light and shade cut-off line forms a passing light pattern after passing through the lens; light emitted by the high-beam light source is emitted out through the high-beam condensation part to form a second light beam, the second light beam passes through the lens to form an upper light type, and the upper light type and the low-beam light type are combined to form a high-beam light type; the lens comprises a light-emitting surface and a light-incident surface, the light-emitting surface is an aspheric surface, a transverse section line and a longitudinal section line of the aspheric surface are curves with the middles protruding outwards, the aspheric surface clockwise rotates by a set angle a with the intersection point of the transverse section line and the longitudinal section line as the original point and the X axis as the rotating axis to obtain the light-emitting surface 111, and the angle a ranges from 3 degrees to 7 degrees; according to the invention, the problems in the prior art can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile lamps, and in particular to an optical unit and an optical module thereof capable of eliminating a black line at the junction of high and low beams. Background Art

[0002] For driving safety, national regulations clearly stipulate that low beam lights must have a clear light and dark cut-off line, that is, the light projection of the headlights should appear on the road with low light on the left and high light on the right, so as to avoid affecting the vision of oncoming drivers.

[0003] The high and low beam integrated module provides low beam and high beam functions. Since the cut-off line in the low beam pattern is formed by the light emitted by the light source after being blocked by a specific optical structure, when the high beam function is provided, the specific optical structure will cause an obvious black line to appear between the upper beam pattern and the low beam pattern. Figure 12 、 Figure 13 As shown, turning on the black line of the high beam function when driving on the road will cause danger to the driver's visual blind spot to a certain extent, and may cause misjudgment and danger to vehicles with pure visual autonomous driving solutions when driving at night.

[0004] In addition, due to the use of the lens, a light shield needs to be installed on the lens bracket to prevent the convex lens from focusing sunlight and burning the lens bracket, which increases production costs and is not conducive to lightweight development. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide an optical unit and an optical module thereof that can eliminate the black line at the junction of the high and low beams, which can effectively solve the problems existing in the prior art.

[0006] The present invention is achieved through the following technical solutions:

[0007] An optical unit capable of eliminating black lines at the junction of high and low beams comprises a lens, an LED circuit board, a concentrator, and a cut-off line forming part, wherein the concentrator is arranged in front of the LED circuit board, the lens is arranged in front of the concentrator, the cut-off line forming part is arranged between the lens and the concentrator, and the focus of the lens is located on the cut-off line forming part; the concentrator comprises a low beam concentrating portion and a high beam concentrating portion, the LED circuit board comprises a low beam light source and a high beam light source, the light emitted by the low beam light source is emitted through the low beam concentrating portion to form a first light beam, and the first light beam is shielded by the cut-off line forming part to form a light beam with a cut-off line. beam, a light beam with a bright and dark cut-off line forms a low beam type after passing through the lens; the light emitted by the high beam light source is emitted through the high beam focusing portion to form a second light beam, and the second light beam forms an upper light type after passing through the lens, and the upper light type is combined with the low beam type to form a high beam type; the lens includes a light emitting surface and a light incident surface, the light emitting surface is an aspherical surface, and the transverse section and the longitudinal section of the aspherical surface are both curves convex outward in the middle, the aspherical surface takes the intersection of the transverse section and the longitudinal section as the origin, and is rotated clockwise with the X-axis as the rotation axis to set an angle a to obtain the light emitting surface, and the angle a range is 3-7 degrees; micro lenses arranged in a grid are provided on the light emitting surface.

[0008] Furthermore, according to the optical unit of the present invention, the light incident surface is an outwardly convex spherical surface, and the radius of the spherical surface cannot be less than the diameter of the lens.

[0009] Furthermore, according to the optical unit of the present invention, a zone III fill light structure is provided on the low beam focusing portion, and the zone III fill light structure is used to provide light supplement for zone III of the low beam light type; a downwardly extending folding edge is provided on the light cutoff molding, and a light release groove is provided on the folding edge, and the light release groove is used to cooperate with the zone III fill light structure so that the light reaching zone III of the low beam light type meets the requirements.

[0010] Furthermore, according to the optical unit of the present invention, the low-beam focusing portion includes three or more low-beam focusing bodies, the front ends of the low-beam focusing bodies are provided with low-beam light-emitting surfaces, and the rear ends are provided with low-beam collimators; the low-beam light source includes three or more low-beam LEDs, one low-beam LED corresponds to one low-beam collimator, and light emitted by the low-beam LED is collimated by the low-beam collimator and then emitted from the low-beam light-emitting surface; the middle low-beam focusing body cooperates with the middle low-beam LED to provide a basic beam of the first light beam, and ensures that the brightness of the basic beam meets the requirements; The low beam concentrator on the left cooperates with the low beam LED on the left to provide a widened beam of the first light beam, thereby expanding the left width of the basic light beam; the low beam concentrator on the right cooperates with the low beam LED on the right to provide a widened beam of the first light beam, thereby expanding the right width of the basic light beam; the zone III fill light structure is arranged at the bottom of the low beam light-emitting surface in the middle, and the zone III fill light structure includes a boss, and the front end surface of the boss is composed of a plurality of convex stripes connected, and the convex stripes are used to diffuse the light and improve the range of the supplementary light.

[0011] Furthermore, according to the optical unit of the present invention, the thickness of the middle low-beam concentrator is greater than that of the low-beam concentrators on both sides, so that the middle low-beam light-emitting surface protrudes between the low-beam light-emitting surfaces on both sides.

[0012] Further, according to the optical unit of the present invention, the transverse cross-section of the low beam light-emitting surface on both sides is a convex arc with an angle b, which is high inside and low outside, and the longitudinal cross-section is a convex arc with an angle d, which is low at the top and high at the bottom. The low beam light-emitting surfaces on both sides are used to adjust the angle and diffuse the incoming light, expand the range of the widened light beam to the left or right and upward through angle adjustment, and improve the uniformity of the widened light beam through diffusion; the transverse cross-section of the low beam light-emitting surface in the middle is a convex arc, and the longitudinal cross-section is a convex arc with an angle d, which is low at the top and high at the bottom. The low beam light-emitting surface in the middle is used to adjust the angle and diffuse the incoming light, expand the upward range of the basic light beam through angle adjustment, and improve the uniformity of the basic light beam through diffusion.

[0013] Furthermore, according to the optical unit of the present invention, the low beam collimators on both sides are inclined at an angle c, and the size of the angle b is adjusted by setting the angle c.

[0014] Furthermore, according to the optical unit of the present invention, the low beam light emitting surface is composed of a plurality of concave stripes connected together, and the concave stripes are used to improve the uniformity of the first light beam; the microlens has a diamond structure with a side length of 0.2-3 mm, and the front end surface of the microlens is an outwardly convex spherical surface with a spherical radius of 6-10 mm.

[0015] Further, according to the optical unit of the present invention, the light / dark cutoff line forming member includes a beam splitter substrate and a beam splitter, the beam splitter is made of 0.1 mm stainless steel, a light / dark cutoff line forming structure is provided on the beam splitter, the focus of the lens is located on the light / dark cutoff line forming structure, the beam splitter is fixed to the upper surface of the beam splitter substrate, and the beam splitter substrate is used to support the beam splitter; the beam splitter substrate is provided with the avoidance opening at a position corresponding to the light / dark cutoff line forming structure, and the avoidance opening is used to avoid the light / dark cutoff line forming structure; the folded edge is provided at one end of the beam splitter substrate away from the light / dark cutoff line forming structure.

[0016] An optical module includes the optical unit described above.

[0017] The present invention adjusts the angle of the light of the upper light type through the light output surface of the lens, so that the light of the upper light type is directed downward, and the downward light of the middle and lower part of the upper light type is directly concentrated on the light-dark cut-off line of the low beam type, thereby eliminating the black line (dark area) between the upper light type and the low beam type when the high beam function is turned on, further improving driving safety; and scatters the sunlight incident from the outside through the light input surface of the lens to prevent the sunlight from focusing, thereby avoiding the installation of a sunshade on the lens bracket, further reducing production costs, and reducing the weight of the optical module, which is conducive to lightweight development; the light is homogenized by a microlens with a diamond structure and a side length of 0.2-3mm, avoiding the vertical stripes on the ground when the low beam type and high beam type are used due to the concentrator with concave stripes, further improving the quality of the low beam type and high beam type, improving driving safety, and effectively solving the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the optical unit of the present invention;

[0019] Figure 2 is a front view of the optical unit of the present invention;

[0020] Figure 3 yes Figure 2 Schematic diagram of the cross-section structure of AA;

[0021] Figure 4 yes Figure 2 An enlarged view of the structure of the center line frame part;

[0022] Figure 5 It is a three-dimensional diagram of the cut-off line forming part of the present invention;

[0023] Figure 6 It is a three-dimensional diagram of the cut-off line forming part of the present invention;

[0024] Figure 7is a front view of the concentrator of the present invention;

[0025] Figure 8 yes Figure 7 Schematic diagram of the cross-section structure of the middle BB;

[0026] Figure 9 yes Figure 7 Schematic diagram of the cross-section structure of CC;

[0027] Figure 10 is a three-dimensional diagram of the optical module of the present invention;

[0028] Figure 11 yes Figure 10 Exploded diagram of the structure;

[0029] Figure 12 It is the high beam pattern provided by the high and low beam integrated module in the prior art;

[0030] Figure 13 yes Figure 12 A top view of

[0031] Figure 14 is the high beam light pattern provided by the optical unit of the present invention;

[0032] Figure 15 yes Figure 14 Top view of .

[0033] In the picture:

[0034] Optical unit 1, lens 11, light emitting surface 111, microlens 1111, light incident surface 112, LED circuit board 12, low beam light source 121, low beam LED 1211, high beam light source 122, high beam LED 1221, concentrator 13, low beam focusing portion 131, high beam focusing portion 132, mounting portion 133, fixing hole 1331, cut-off line molding 14, beam splitter substrate 141, folded edge 1411, light release groove 1412, Avoidance 1413, beam splitter 142, light and dark cut-off line forming structure 1421, radiator 2, lens bracket 3, limiting groove 31, mounting bracket 4, limiting plug 41, limiting mechanism 5, limiting column 51, limiting hole 52, low beam concentrator 6, low beam light emitting surface 61, low beam collimator 62, high beam concentrator 7, high beam light emitting surface 71, high beam collimator 72, concave stripes 8, zone III fill light structure 9, boss 91, convex stripes 10, tooth angle 20. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] like Figure 1-11 As shown, an optical module includes an optical unit 1 and a heat sink 2. The optical unit 1 is arranged on the heat sink 2. The optical unit 1 here is the optical unit that can eliminate the black line at the junction of the high and low beams referred to in the present invention. Specifically, the optical unit 1 includes a lens 11, an LED circuit board 12, a concentrator 13 and a light-and-dark cutoff line molding 14. The concentrator 13 is arranged in front of the LED circuit board 12, and the lens 11 is arranged in front of the concentrator 13. The light-and-dark cutoff molding 14 is arranged between the lens 11 and the concentrator 13, and the focus of the lens 11 is located on the light-and-dark cutoff molding 14; the concentrator 13 includes a low beam concentrating portion 131 and a high beam concentrating portion 132, and the LED circuit board 12 includes a low beam concentrating portion 131 and a high beam concentrating portion 132. The low beam light source 121 and the high beam light source 122, the light emitted by the low beam light source 121 is emitted through the low beam focusing portion 131 to form a first light beam, the first light beam is blocked by the light-and-dark cutoff molding 14 to form a light beam with a light-and-dark cutoff line, the light beam with the light-and-dark cutoff line passes through the lens 11 to form a low beam light type; the light emitted by the high beam light source 122 is emitted through the high beam focusing portion 132 to form a second light beam, the second light beam passes through the lens 11 to form an upper light type, the upper light type and the low beam light type are combined to form a high beam light type, such as Figure 14 、 Figure 15As shown; the lens 11 includes a light emitting surface 111 and a light incident surface 112, the light emitting surface 111 is an aspheric surface, and the transverse section and the longitudinal section of the aspheric surface are both curves convex outward in the middle, the aspheric surface takes the intersection of the transverse section and the longitudinal section as the origin, and is rotated clockwise with the X-axis as the rotation axis to set an angle a to obtain the light emitting surface 111, and the angle a range is 3-7 degrees; the light emitting surface 111 obtained by rotating the aspheric surface 3-7 degrees can make the axis of the light emitting surface 111 deviate from the conventional center position, so that the light angle of the upper light type can be adjusted, so that the light of the upper light type is downward, and the downward light of the middle and lower part of the upper light type is directly concentrated on the light-dark cut-off line of the low beam type, thereby eliminating the black line (dark area) between the junction of the upper light type and the low beam type when the high beam function is turned on, further improving driving safety. Specifically, the LED circuit board 12 is arranged on the radiator 2, and the concentrator 13 is arranged on the radiator 2 and is located in front of the LED circuit board 12. A lens bracket 3 is provided on the radiator 2, and the lens bracket 3 is used to support the lens 11 so that the lens 11 is located in front of the concentrator 13. The light-dark cut-off line molding 14 is fixed in the lens bracket 3 through the mounting bracket 4, and the light-dark cut-off line molding 14 is located between the lens 11 and the concentrator 13. In this embodiment, the aspheric surface is rotated 4.5 degrees to obtain the light-emitting surface 111. By rotating 4.5 degrees, the axis of the light-emitting surface 111 deviates from the conventional center position. At this time, the upper light type is downward by 1 degree, and the light in the middle and lower part of the upper light type is directly concentrated on the light-dark cut-off line of the low beam type, so that the upper light type and the low beam type are seamlessly combined, thereby eliminating the black line (dark area) between the joints; at the same time, excessive rotation of the angle a can be avoided, which not only affects the maximum illumination value (Emax value) of the high beam type and the energy distribution and shape of the light type, but also affects the energy distribution and shape of the low beam type.

[0037] In the prior art, due to the use of lens 11, a light shield needs to be installed on lens holder 3 to prevent sunlight from focusing and burning lens holder 3, which increases production costs and is not conducive to lightweight development. The light incident surface 112 is a spherical surface that bulges outward, and the radius of the spherical surface cannot be less than the diameter of lens 11. In this embodiment, the diameter of lens 11 is 70mm, and the spherical radius of light incident surface 112 is preferably 120mm. The spherical shape of light incident surface 112 disperses external sunlight to prevent it from focusing, thereby avoiding the need for a light shield on lens holder 3, further reducing production costs, and at the same time reducing the weight of the optical module, which is conducive to lightweight development.

[0038] The light-emitting surface 111 is provided with microlenses 1111 arranged in a grid pattern. The front end surface of the microlens 1111 is a spherical surface that bulges outward, and the spherical radius is 6-10 mm, and the preferred spherical radius is 8 mm. The setting of the microlens 1111 can reduce the corresponding gradient value, making the light and dark cut-off line in the low beam light pattern less sharp.

[0039] Furthermore, the low beam focusing portion 131 includes more than three low beam concentrators 6, the front end of the low beam concentrator 6 is provided with a low beam light emitting surface 61, and the rear end is provided with a low beam collimator 62; the low beam light source 121 includes more than three low beam LEDs 1211, one low beam LED 1211 corresponds to one low beam collimator 62, and the light emitted by the low beam LED 1211 is collimated by the low beam collimator 62 and then emitted by the low beam light emitting surface 61; the middle low beam concentrator 6 cooperates with the middle low beam LED 1211 to provide a basic beam of the first light beam and ensure that the brightness of the basic beam meets the requirements; the low beam concentrator 6 on the left cooperates with the low beam LED 1211 on the left to provide a widened beam of the first light beam, thereby expanding the left width of the basic light beam; the low beam concentrator 6 on the right cooperates with the low beam LED 1211 on the right to provide a widened beam of the first light beam, thereby expanding the right width of the basic light beam. Specifically, the thickness of the central low-beam concentrator 6 is greater than that of the low-beam concentrators 6 on either side, causing the low-beam light-emitting surface 61 of the central low-beam concentrator 6 to protrude between the low-beam light-emitting surfaces 61 on the two low-beam concentrators 6. By increasing the thickness, the brightness of the basic light beam is increased, further improving the quality of the low-beam light pattern to meet the diverse needs of customers. The low-beam light-emitting surfaces 61 on the two low-beam concentrators 6 have a convex arc shape with an angle b in the horizontal section, and a convex arc shape with an angle d in the longitudinal section, with a convex arc shape with an angle d in the vertical section. The low-beam light-emitting surfaces 61 on the two low-beam concentrators 6 are used to adjust the angle of the incoming light and diffuse it. This angle adjustment expands the range of the widened light beam to the left, right, and upward, and diffusion improves the uniformity of the widened light beam, further improving the quality of the low-beam light pattern. The low-beam light-emitting surface 61 on the middle low-beam concentrator 6 has a convex arc in its transverse cross-section and a convex arc in its longitudinal cross-section at an angle d, with a lower top and a higher bottom. The low-beam light-emitting surface 61 on the middle low-beam concentrator 6 is used to adjust the angle and diffuse the incoming light. This angle adjustment expands the upward range of the basic light beam and improves the uniformity of the basic light beam through diffusion, further improving the quality of the low-beam pattern. Those skilled in the art will appreciate that the low-beam concentrator 131 can also be composed of five, seven, nine, or more low-beam concentrators 6 connected together. Increasing the number of low-beam concentrators 6 can gradually increase the width of the low-beam pattern, providing a better transition and thus improving the quality of the low-beam pattern.In this embodiment, the low beam focusing portion 131 is composed of seven low beam concentrators 6 arranged in a straight line, and the farther the low beam light emitting surface 61 of the six low beam concentrators 6 on both sides is from the middle low beam concentrator 6, the larger the lateral inclination angle b is; the low beam light source 121 is composed of seven low beam LEDs 1211 arranged in a straight line; the middle low beam concentrator 6 cooperates with the corresponding low beam LED 1211 to provide a basic beam of the first light beam, and the six low beam concentrators 6 on both sides cooperate with the corresponding low beam LED 1211 to provide a wide beam of the first light beam. By increasing the number of low beam concentrators 6 on both sides, the width of the low beam light pattern is gradually increased, and the transition between each light beam is made softer, thereby further improving the uniformity of the low beam light pattern. The obtained low beam light pattern can not only meet the standard requirements, but also meet customer requirements, and the production cost is lower than that of more than nine low beam concentrators 6.

[0040] Furthermore, the high beam focusing portion 132 includes more than three high beam concentrators 7, the front end of the high beam concentrator 7 is provided with a high beam light emitting surface 71, and the rear end is provided with a high beam collimator 72; the high beam light source 122 includes more than three high beam LEDs 1221, one high beam LED 1221 corresponds to one high beam collimator 72, and the light emitted by the high beam LED 1221 is collimated by the high beam collimator 72 and then emitted from the high beam light emitting surface 71; the middle high beam concentrator 7 cooperates with the middle high beam LED 1221 to provide a basic beam of the second light beam and ensure that the brightness of the basic beam meets the requirements; the high beam concentrator 7 on the left cooperates with the high beam LED 1221 on the left to provide a widened beam of the second light beam, thereby expanding the left width of the basic light beam; the high beam concentrator 7 on the right cooperates with the high beam LED 1221 on the right to provide a widened beam of the second light beam, thereby expanding the right width of the basic light beam. Specifically, the transverse cross-section of the high-beam light-emitting surface 71 on the high-beam concentrators 7 on both sides is a convex arc with an angle b, which is higher inside and lower outside, and the longitudinal cross-section is a convex arc with an angle d, which is higher at the top and lower at the bottom. The high-beam light-emitting surface 71 on the high-beam concentrators 7 on both sides is used to adjust the angle of the incoming light and diffuse it. By adjusting the angle, the range of the widened light beam to the left, right, and downward is expanded. By diffusion, the uniformity of the widened light beam is improved, further improving the quality of the high-beam light pattern. The transverse cross-section of the high-beam light-emitting surface 71 on the middle high-beam concentrator 7 is a convex arc. The longitudinal cross-section is a convex arc with an angle d, which is higher at the top and lower at the bottom. The high-beam light-emitting surface 71 on the middle high-beam concentrator 7 is used to adjust the angle of the incoming light and diffuse it. By adjusting the angle, the range of the basic light beam to the left, right, and downward is expanded. By diffusion, the uniformity of the basic light beam is improved, further improving the quality of the high-beam light pattern. Those skilled in the art understand that the high beam focusing portion 132 can also be composed of five, seven, nine, etc. high beam focusing bodies 7 connected together. By increasing the number, the width of the high beam pattern can be gradually increased, and the quality of the high beam pattern can be further improved. In this embodiment, the high beam focusing portion 132 is composed of five high beam concentrators 7 arranged in a straight line, and the farther the four high beam concentrators 7 on both sides are from the middle high beam concentrator 7, the larger the lateral inclination angle b of the high beam light emitting surface 71 is; the high beam light source 122 is composed of five high beam LEDs 1221 arranged in a straight line; the middle high beam concentrator 7 cooperates with the corresponding high beam LED 1221 to provide a basic beam of the second light beam, and the four high beam concentrators 7 on both sides cooperate with the corresponding high beam LED 1221 to provide a wide beam of the second light beam. By increasing the number of high beam concentrators 7 on both sides, the width of the high beam light pattern is gradually increased, and the transition between each light beam is made softer, thereby further improving the uniformity of the high beam light pattern. The obtained high beam light pattern can not only meet the standard requirements, but also meet customer requirements, and the production cost is lower than that of more than seven high beam concentrators 7.

[0041] In order to avoid the problem that the angle b is too large, which causes the tooth angle 20 at one end of the low beam light-emitting surface 61 or the high beam light-emitting surface 71 on both sides to be too small (sharp), and the smaller the tooth angle 20 is, the more difficult the injection mold processing and injection molding production will be; the low beam collimators 62 or the high beam collimators 72 on both sides are inclined at an angle c, and the size of the angle b is adjusted by setting the angle c, so as to avoid the tooth angle 20 being too small, thereby reducing the difficulty of injection mold processing and improving the injection molding qualification rate of the concentrator 13.

[0042] In order to improve the assembly efficiency of the optical module, the concentrator 13 is an integrated part, and the high beam concentrating portion 132 is integrally arranged below the low beam concentrating portion 131. The concentrator 13 also includes a mounting portion 133, and a fixing hole 1331 is provided on the mounting portion 133. The fixing hole 1331 is used to fix the concentrator 13 on the radiator 2.

[0043] To improve the quality of the light beam, the low-beam light-emitting surface 61 or the high-beam light-emitting surface 71 is composed of a plurality of concave stripes 8 connected together. The concave stripes 8 are used to improve the uniformity of the light beam. At the same time, the low-beam light-emitting surface 61 or the high-beam light-emitting surface 71 composed of a plurality of concave stripes 8 can effectively avoid the problem of inconsistent precision when the low-beam light-emitting surface 61 or the high-beam light-emitting surface 71 is a single surface and the mold is processed for a large area. In addition, the low-beam light-emitting surface 61 or the high-beam light-emitting surface 71 composed of a plurality of concave stripes 8 can also prevent the occurrence of shrinkage at a certain position when the low-beam light-emitting surface 61 or the high-beam light-emitting surface 71 is a single surface, which affects the light output quality of the entire low-beam light-emitting surface 61 or the high-beam light-emitting surface 71. It should be noted here that the high-beam light-emitting surface 71 on the high-beam concentrator 7 located in the middle of the high-beam concentrating portion 132 does not need to be provided with concave stripes 8, so as to prevent the brightness of the second light beam from being weakened. Of course, the low-beam light-emitting surface 61 of the low-beam concentrator 6 located in the middle of the low-beam concentrator 131 can also be provided with no concave stripes 8, thereby preventing the brightness of the first light beam from being weakened. In this embodiment, all of the high-beam light-emitting surfaces 71 on the high-beam concentrator 132 are provided with concave stripes 8, except for the middle one. All of the low-beam light-emitting surfaces 61 on the low-beam concentrator 131 are provided with concave stripes 8. The low-beam light-emitting surface 61 located in the middle is also provided with concave stripes 8, mainly because the low-beam concentrator 6 in the middle has already increased its thickness to increase the brightness of the first light beam. While ensuring the brightness, the concave stripes 8 can be added to its low-beam light-emitting surface 61 to improve the uniformity of the first light beam and further improve the quality of the low-beam light pattern. Those skilled in the art understand that the high-beam concentrator 7 in the middle can also increase its thickness to increase the brightness of the second light beam, so concave stripes 8 can also be provided on the high-beam light-emitting surface 71 of the high-beam concentrator 7 in the middle.

[0044] Specifically, the microlens 1111 has a diamond structure with a side length of 0.2-3 mm, preferably 0.4 mm. The microlens 1111 with a diamond structure and a side length of 0.4 mm can better homogenize the light, avoiding the vertical stripes on the ground caused by the concentrator 13 with concave stripes 8 when the low beam and high beam are used, further improving the quality of the low beam and high beam, and enhancing driving safety.

[0045] Furthermore, a zone III fill light structure 9 is provided on the low beam focusing portion 131, and the zone III fill light structure 9 is used to provide supplementary light for zone III in the low beam light pattern; a downwardly extending folding edge 1411 is provided on the light cutoff molding 14, and a light release groove 1412 is provided on the folding edge 1411, and the light release groove 1412 is used to cooperate with the zone III fill light structure 9, so that the light reaching zone III of the low beam light pattern meets the requirements, thereby further improving the optical quality of the low beam light pattern. Specifically, the cut-off line molding member 14 includes a beam splitter substrate 141 and a beam splitter 142. The beam splitter 142 is provided with a cut-off line molding structure 1421. The focus of the lens 11 is located on the cut-off line molding structure 1421. The beam splitter 142 is fixed to the upper surface of the beam splitter substrate 141. The beam splitter substrate 141 is used to support the beam splitter 142. The cut-off line molding member 14 is fixed to the mounting bracket 4 through the beam splitter substrate 141. In order to prevent the beam splitter substrate 141 from increasing the thickness of the cut-off line molding member 14, the black line between the upper beam type and the low beam type is wider. In order to solve the problem that the axis deviation of the light-emitting surface 111 becomes larger due to the wider black line , which affects the maximum illumination value (Emax value) of the high beam light pattern and the energy distribution and shape of the light pattern, thereby reducing the quality of the high beam light pattern. At the same time, it affects the energy distribution and shape of the low beam light pattern, thereby reducing the quality of the low beam light pattern. The beam splitter 142 is made of 0.1 mm stainless steel. The beam splitter substrate 141 is provided with an avoidance opening 1413 at the position corresponding to the light-and-dark cut-off line forming structure 1421. The avoidance opening 1413 is used to avoid the light-and-dark cut-off line forming structure 1421, thereby ensuring that the thickness at the light-and-dark cut-off line forming structure 1421 remains unchanged. The folded edge 1411 is provided at one end of the beam splitter substrate 141 away from the light-and-dark cut-off line forming structure 1421. In this embodiment, the zone III fill light structure 9 is arranged at the bottom of the low beam light emitting surface 61 on the middle low beam concentrator 6, and the position of the light release groove 1412 corresponds to the zone III fill light structure 9. The light release groove 1412 can be adjusted in size as needed to control the illumination intensity of the fill light and the size of the light spot, so that zone III in the low beam light pattern can obtain better quality fill light.

[0046] Furthermore, the zone III fill light structure 9 includes a boss 91 , the front end surface of the boss 91 is connected by a plurality of convex stripes 10 , and the convex stripes 10 are used to diffuse the light, increase the range of the fill light, and further improve the quality of the low beam light pattern.

[0047] In addition, during assembly, the cutoff molding 14 is fixed in the lens holder 3 on which the lens 11 is installed through the mounting bracket 4, while the concentrator 13 and the LED circuit board 12 are respectively fixed on the radiator 2, and the lens holder 3 is then installed on the radiator 2. Such an installation is prone to position deviation, thereby resulting in a decrease in the quality of the low beam and high beam types. A limiting mechanism 5 is provided between the light / dark cutoff molding 14 and the mounting bracket 4, through which the light / dark cutoff molding 14 is limited on the mounting bracket 4 and then fixed to the mounting bracket 4 by screws; a limiting mechanism 5 is provided between the mounting bracket 4 and the lens bracket 3, through which the mounting bracket 4 is limited on the lens bracket 3 and then fixed to the lens bracket 3 by screws; limiting mechanisms 5 are respectively provided between the concentrator 13, the LED circuit board 12 and the radiator 2, through which the LED circuit board 12 and the concentrator 13 are respectively limited on the radiator 2 and then fixed to the radiator 2 by screws; a limiting mechanism 5 is provided between the concentrator 13 and the mounting bracket 4, through which the lens bracket 3 is limitedly connected to the radiator 2 and then fixed to the radiator 2 by screws. Specifically, the limiting mechanism 5 includes a limiting column 51 and a limiting hole 52. The limiting column 51 is inserted into the limiting hole 52 to complete the limiting. Through the limiting mechanism 5, the position of each part in the optical unit 1 after installation is more precise, further improving the quality of the low beam and high beam types and enhancing driving safety.

[0048] The cut-off molding 14 is installed at the front end of the mounting bracket 4, and the rear end of the mounting bracket 4 is fixed to the lens bracket 3 by screws. The front end of the mounting bracket 4 extends into the lens bracket 3. Since the front end of the mounting bracket 4 has no support, it is easy to produce slight vibration when driving on a bumpy road, resulting in blurred cut-off lines in the low beam pattern, affecting oncoming vehicles; a limiting groove 31 is also provided in the lens bracket 3, and a silicone layer can also be provided in the limiting groove 31. A limiting plug 41 is provided at the top of the mounting bracket 4, and the limiting plug 41 is inserted into the limiting groove 31 to provide limited support for the front end of the mounting bracket 4 and cushion it through the silicone layer to avoid friction and abnormal noise.

Claims

1. An optical unit capable of eliminating the black line at the junction of high and low beams, characterized in that: The invention comprises a lens, an LED circuit board, a concentrator and a cut-off line forming part, wherein the concentrator is arranged in front of the LED circuit board, the lens is arranged in front of the concentrator, the cut-off line forming part is arranged between the lens and the concentrator, and the focus of the lens is located on the cut-off line forming part; the concentrator comprises a low-beam concentrating part and a high-beam concentrating part, the LED circuit board comprises a low-beam light source and a high-beam light source, the light emitted by the low-beam light source is emitted through the low-beam concentrating part to form a first light beam, the first light beam is shielded by the cut-off line forming part to form a light beam with a cut-off line, and the light beam with a cut-off line is formed. After the light beam passes through the lens, it forms a low beam type; the light emitted by the high beam light source is emitted through the high beam focusing part to form a second light beam, and the second light beam forms an upper light type after passing through the lens, and the upper light type is combined with the low beam type to form a high beam type; the lens includes a light emitting surface and a light incident surface, and the light emitting surface is an aspherical surface, and the transverse section and the longitudinal section of the aspherical surface are both curves convex outward in the middle. The aspherical surface takes the intersection of the transverse section and the longitudinal section as the origin, and is rotated clockwise with the X-axis as the rotation axis to set an angle a to obtain the light emitting surface, and the angle a range is 3-7 degrees; micro lenses arranged in a grid are provided on the light emitting surface.

2. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 1, characterized in that: The light incident surface is a spherical surface convex outward, and the radius of the spherical surface cannot be less than the diameter of the lens.

3. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 1, characterized in that: The low beam focusing portion is provided with a zone III fill light structure, and the zone III fill light structure is used to provide light supplement for zone III of the low beam light type; the light and dark cutoff molding is provided with a downwardly extending folding edge, and the folding edge is provided with a light release groove, and the light release groove is used to cooperate with the zone III fill light structure, so that the light reaching zone III of the low beam light type meets the requirements.

4. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 4, characterized in that: The low beam focusing portion includes more than three low beam focusing bodies, the front end of the low beam focusing body is provided with a low beam light emitting surface, and the rear end is provided with a low beam collimator; the low beam light source includes more than three low beam LEDs, one low beam LED corresponds to one low beam collimator, and the light emitted by the low beam LED is collimated by the low beam collimator and then emitted by the low beam light emitting surface; the low beam focusing body in the middle cooperates with the low beam LED in the middle to provide the basic light beam of the first light beam and ensure that the brightness of the basic light beam meets the requirements; the low beam on the left The concentrator cooperates with the low-beam LED on the left to provide a widened beam of the first light beam, thereby expanding the left width of the basic light beam; the low-beam concentrator on the right cooperates with the low-beam LED on the right to provide a widened beam of the first light beam, thereby expanding the right width of the basic light beam; the zone III fill light structure is arranged at the bottom of the low-beam light-emitting surface in the middle, and the zone III fill light structure includes a boss, and the front end surface of the boss is composed of a plurality of convex stripes connected, and the convex stripes are used to diffuse the light and improve the range of the supplementary light.

5. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 4, characterized in that: The thickness of the low-beam concentrator in the middle is greater than that of the low-beam concentrators on both sides, so that the low-beam light-emitting surface in the middle is raised between the low-beam light-emitting surfaces on both sides.

6. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 4, characterized in that: The transverse cross-section of the low beam light-emitting surface on both sides is a convex arc with an angle b, which is high inside and low outside, and the longitudinal cross-section is a convex arc with an angle d, which is low at the top and high at the bottom. The low beam light-emitting surfaces on both sides are used to adjust the angle and diffuse the incoming light, expand the range of the widened light beam to the left or right and upward through angle adjustment, and improve the uniformity of the widened light beam through diffusion; the transverse cross-section of the low beam light-emitting surface in the middle is a convex arc, and the longitudinal cross-section is a convex arc with an angle d, which is low at the top and high at the bottom. The low beam light-emitting surface in the middle is used to adjust the angle and diffuse the incoming light, expand the upward range of the basic light beam through angle adjustment, and improve the uniformity of the basic light beam through diffusion.

7. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 6, characterized in that: The low beam collimators on both sides are inclined at an angle c, and the size of the angle b is adjusted by setting the angle c.

8. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 4, characterized in that: The low beam light emitting surface is composed of a plurality of concave stripes connected together, and the concave stripes are used to improve the uniformity of the first light beam; the microlens has a diamond structure with a side length of 0.2-3mm, and the front end surface of the microlens is a spherical surface convex outward, and the spherical radius is 6-10mm.

9. The optical unit capable of eliminating the black line at the junction of high and low beams according to claim 3, characterized in that: The cutoff line forming member includes a beam splitter substrate and a beam splitter. The beam splitter is made of 0.1 mm stainless steel. A cutoff line forming structure is provided on the beam splitter. The focus of the lens is located on the cutoff line forming structure. The beam splitter is fixed to the upper surface of the beam splitter substrate, and the beam splitter substrate is used to support the beam splitter. The beam splitter substrate is provided with the avoidance opening at a position corresponding to the cutoff line forming structure, and the avoidance opening is used to avoid the cutoff line forming structure. The folded edge is provided at one end of the beam splitter substrate away from the cutoff line forming structure.

10. An optical module, characterized in that: The optical unit comprises the optical unit described in any one of claims 1 to 9.

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