KR102297013B1 - Adaptive drive beam moudule - Google Patents

Abstract

The adaptive driving beam module according to an embodiment of the present invention is an adaptive driving beam module provided in a headlamp of a vehicle to irradiate up and down beams and block at least a portion of the up and down beams in an area where a vehicle appearing in front of the vehicle is located. It is a driving beam module, at least one light source, a first incident surface to which the light emitted from the light source is incident, and refracts the light incident through the first incident surface to emit light of a beam pattern having a first aspect ratio A first lens including a first exit surface and a second lens refracting a beam pattern having the first aspect ratio emitted from the first lens to form a beam pattern of the vertical beam, wherein the second lens includes: , an aspherical lens unit including a second incident surface on which some of the light emitted from the first lens is incident, and a second prism surface extending from an image side of the second incident surface to be inclined toward the first lens. and an upper prism lens unit.

Description

Adaptive drive beam module

The present invention relates to an adaptive driving beam module, and more particularly, to an adaptive driving beam module provided in a headlamp of a vehicle to provide illumination to the front of the vehicle.

In general, a vehicle is equipped with various 'vehicle' lamps having a lighting function to easily check an object located around the vehicle during night driving and a signal function to notify other vehicles or road users of the driving state of the vehicle.

Among the lamps mounted on a vehicle, a head lamp is a lamp including a function to secure a driver's front view when driving at night, and generally includes a low beam (down beam) that is irradiated with light in a short distance in front of the vehicle and a head lamp in front of the vehicle. It is equipped with a function that can irradiate the high beam (upward beam) that is irradiated to a long distance simultaneously or separately.

From the driver's point of view, irradiating the low beam and high beam at the same time is the safest way to drive the vehicle because it can secure the driver's field of vision for both near and far in front of the vehicle at the same time. There is a risk that it causes glare of pedestrians, making it impossible to secure the field of vision during the time required for light adaptation and dark adaptation.

However, if the driver continuously checks the opposing vehicle or pedestrian and repeats the ON/OFF operation of the high beam, the safety of vehicle operation is also impaired, and the driver feels considerable inconvenience.

Complementary to this, the high beam is automatically turned ON/OFF depending on the presence of an oncoming vehicle and/or a preceding vehicle, or the low beam/high beam irradiation angle and/or brightness is controlled according to road conditions (city area, highway, intersection, etc.) Driver assistance systems have been developed and commercialized.

Recently, an adaptive type that detects an opposing vehicle, a preceding vehicle, a pedestrian, etc. from an image image in front of the vehicle, and changes the lamp irradiation angle or turns off the light source so that the high beam is not irradiated where the detected vehicle or pedestrian is located Driving beam (Adaptive drive beam, ADB) technology is developing.

The problem to be solved by the present invention is an adaptive driving beam module for irradiating a vertical beam of an adaptive driving beam (ADB), an adaptive driving beam module capable of irradiating a vertical beam with improved chromatic aberration and improved front visibility is to provide

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

An adaptive driving beam module according to an embodiment of the present invention for solving the above problems is provided in a headlamp of a vehicle to irradiate up and down beams, and for an area where a vehicle appearing in front of the vehicle is located, It is an adaptive driving beam module that blocks at least a part, at least one light source, a first incident surface on which the light emitted from the light source is incident, and a beam having a first aspect ratio by refracting the light incident through the first incident surface A first lens including a first emitting surface for emitting light of a pattern, and a second lens for refracting a beam pattern having the first aspect ratio emitted from the first lens to form a beam pattern of the up and down beams, and , the second lens is formed so as to be inclined toward the first lens from an aspherical lens unit including a second incident surface on which some of the light emitted from the first lens is incident, and an image side of the second incident surface and an upper prism lens unit including a second prism surface.

The upper prism lens unit may upwardly refract some of the light incident on the second prism surface to form an upper pattern among the beam patterns of the vertical and downward beams.

The upper prism lens unit may be configured such that the beam pattern of the up and down beam is shifted upward than the beam pattern having the first aspect ratio, or a second aspect ratio of the beam pattern of the up and down beam having a higher vertical ratio than the first aspect ratio. can have it

The second lens may further include a lower prism lens unit including a third prism surface extending from a lower side of the second incident surface to be inclined toward the first lens.

The lower prism lens unit may upwardly refract some of the light incident on the third prism surface to improve luminosity of a central pattern among the beam patterns of the vertical and downward beams.

The upper prism lens unit and the lower prism lens unit may be formed asymmetrically with respect to an optical axis of the second lens.

In order to reduce chromatic aberration of the beam pattern of the vertical beam, at least one of the upper prism lens unit and the lower prism lens unit may be formed of a material different from that of the aspherical lens unit.

The aspherical lens unit may be formed of a material containing polymethyl methacrylate (PMMA), and at least one of the upper prism lens unit and the lower prism lens unit may be formed of a material containing PC (polycarbonate).

The second incident surface may be formed as a concave curved surface.

The first exit surface is formed to be spaced apart from the first incidence surface and is inclined toward the first incidence surface to refract a light path of some of the light passing through the first lens to the periphery of the second lens. 1 may include a prism face.

The first prism surface may form an upper portion of the first emission surface to form an upper pattern among the beam patterns of the vertical beam.

The first prism surface may form a lower portion of the first emitting surface to improve luminosity of a downward beam pattern among the beam patterns of the vertical beam.

An adaptive driving beam module according to another embodiment of the present invention for solving the above problems is provided in a headlamp of a vehicle to irradiate up and down beams, and the up and down beams are provided in the area where the vehicle appearing in front of the vehicle is located. It is an adaptive driving beam module that blocks at least part of and a second lens refracting the beam pattern having the first aspect ratio to form a beam pattern of the up and down beams, wherein the first lens includes a first incident surface on which the light emitted from the light source is incident and the first A vertical asymmetric shape including a first prism surface that is formed spaced apart from the incident surface and inclined toward the first incident surface to refract a light path of some of the light passing through the first lens to the periphery of the second lens It includes a first exit surface having a.

The first prism surface may form an upper portion of the first emission surface to form an upper pattern among the beam patterns of the vertical beam.

The first prism surface may form a lower portion of the first emitting surface to improve luminosity of a downward beam pattern among the beam patterns of the vertical beam.

Other specific details of the invention are included in the detailed description and drawings.

According to the embodiments of the present invention, there are at least the following effects.

By improving the chromatic aberration of the emitted light, it is possible to provide more improved front visibility.

In addition, the upper (far) beam pattern can be strengthened to provide a wider forward field of view.

In addition, the near field of view can be secured by maintaining or improving the luminosity of the lower (near) beam pattern.

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a diagram schematically illustrating an adaptive driving beam module according to a first embodiment of the present invention.
2 is a diagram schematically illustrating an adaptive driving beam module according to a second embodiment of the present invention.
3 is a view illustrating a beam pattern in which a conventional vertical beam is irradiated onto a screen.
4 is a view illustrating a beam pattern in which the up and down beams of the adaptive driving beam module according to the second embodiment of the present invention are irradiated onto a screen.
5 is an image of irradiating up and down beams onto a screen when the aspherical lens unit and the upper/lower prism lens unit are made of the same material.
6 is an image of irradiating up and down beams onto a screen when the aspherical lens unit and the upper/lower prism lens unit are made of different materials.
7 is a diagram schematically illustrating an adaptive driving beam module according to a third embodiment of the present invention.
8 is a diagram schematically illustrating an adaptive driving beam module according to a fourth embodiment of the present invention.
9 is a diagram illustrating a beam pattern in which the up and down beams of the adaptive driving beam module according to the fourth embodiment of the present invention are irradiated onto a screen.
10 is a diagram schematically illustrating an adaptive driving beam module according to a fifth embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In addition, the embodiments described herein will be described with reference to cross-sectional and/or schematic diagrams that are ideal illustrative views of the present invention. Accordingly, the form of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. In addition, in each of the drawings shown in the present invention, each component may be enlarged or reduced to some extent in consideration of convenience of description. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining the adaptive driving beam module according to embodiments of the present invention.

First, an adaptive driving beam module according to a first embodiment of the present invention will be described.

1 is a diagram schematically illustrating an adaptive driving beam module according to a first embodiment of the present invention.

As shown in FIG. 1 , the adaptive driving beam module 1 according to the first embodiment of the present invention includes a light source 10 , a first lens 20 , and a second lens 30 .

The light emitted from the light source 10 passes through the first lens 20 and the second lens 30 to form a beam pattern irradiated to the front of the vehicle. The beam pattern irradiated to the front of the vehicle is formed as a beam pattern of a vertical beam extending vertically around a cut-off line of the downward beam.

In FIG. 1 , one light source 10 is illustrated in order to more specifically express the path of light emitted from the light source 10 , but a plurality of light sources may be used.

As the light source 10 , a semiconductor light emitting device such as a light emitting diode (LED) or a laser diode (LD) may be used. Alternatively, a bulb-type lamp may be used as the light source 10 . As the bulb-type lamp, a halogen lamp, a High Intendity Dischage (HID) lamp, or the like may be used.

1 , the light source 10 may be disposed on the optical axis X of the first lens 20 and the second lens 30 . Alternatively, when a plurality of light sources 10 are used, the plurality of light sources 10 may be symmetrical about the optical axis X.

1 , the first lens 20 is disposed between the light source 10 and the second lens 30 . The first lens 20 includes a first incident surface 21 on which light emitted from the light source 10 is incident, and a first exit surface 22 on which a predetermined beam pattern is emitted toward the second lens 30 . do.

The first exit surface 22 includes a first prism surface 23 .

The first prism surface 23 forms an upper portion of the first emission surface 22, and is inclined toward the first incident surface 21 compared to other first emission surface regions (the lower portion of the first emission surface 22). is formed As a result, as shown in FIG. 1 , the second lens 30 has a vertical asymmetric shape with respect to the optical axis (X). When the dotted line portion shown in FIG. 1 is compared with the first prism surface 23 , the vertical asymmetric shape of the second lens 30 can be seen more clearly. The dotted line portion indicated in FIG. 1 indicates the lower portion of the first emission surface in line symmetry with respect to the optical axis (X).

As shown in FIG. 1 , the first prism surface 23 may be formed to be spaced apart from the optical axis X by a predetermined distance. That is, the lower end 23a of the first prism surface 23 may be formed at a point spaced apart _{from the optical axis X by d 1 .} And the upper end of the first prism surface 23 may extend to coincide with the upper end of the first lens 20 . The first prism surface 23 may be formed of a plane forming an inclination, or may include a partially or entirely curved surface.

The first lens 20 forms the light emitted from the light source 10 in a beam pattern having a first aspect ratio and is emitted toward the second lens 30 .

The first prism surface 23 of the first lens 20 is formed to be inclined toward the first incident surface 21 , and the light L ₁ emitted through the first prism surface 23 is refracted upward to obtain the first prism surface 23 . 2 It is made to be incident on the upper side of the second incident surface 32 of the lens 30 .

In FIG. 1 , in order to show the difference in the light propagation path depending on whether or not the first prism surface 23 is formed on the first exit surface 22 , the light travel path in the absence of the first prism surface 23 is shown. It is indicated by a dotted line.

As shown in FIG. 1 , the light L ₁ emitted through the first prism surface 23 is refracted upward and is incident on the upper side of the second incident surface 32 of the second lens 30 , while the second If the first prism surface 23 is not formed (the exit surface shown in dotted lines), the light (L ₃₎ passing through the first lens 20 into the optical path to be substantially overlapped with the L ₁ light is below the L ₁ light It is incident on the central portion of the incident surface 32 of the second lens 30 .

Accordingly, the first lens 20 according to the first embodiment of the present invention has a longitudinal ratio compared to a beam pattern emitted by a lens in which the first prism surface 23 is not formed by the first prism surface 23 . A beam pattern having a large first aspect ratio is emitted.

Meanwhile, the second lens 30 is disposed on the side of the first exit surface 22 of the first lens 20 .

1 , the second lens 30 includes a second exit surface 31 and a second incidence surface 32 .

The second exit surface 31 forms an aspherical surface convex forward, and the second incidence surface 32 forms an aspherical surface concavely recessed toward the second exit surface 31 .

The aspherical exit surface 31 shown in FIG. 1 is an example of an exit surface of a typical aspherical lens, but may be formed in the shape of an exit surface of a Fresnel lens.

A flange 33 extending from the second exit surface 31 and/or the second incidence surface 32 is formed on the outer edge of the second lens 30 . The flange 33 is a structure for fixing the second lens 30 to the housing (not shown) of the adaptive driving beam module 1 according to the present embodiment.

As shown in FIG. 1 , the second incident surface 32 may form a concave incident surface and may form protruding ends 34 and 35 protruding to the rear of the flange 33 at upper and lower portions.

The first protruding end 34 forming an upper portion of the second incident surface 32 expands the light emitted from the first lens 20 upward and forming a second lower portion of the second incident surface 32 . The protruding end 35 extends the light emitted from the first lens 20 downward.

As a result, the beam pattern having the first aspect ratio formed by the first lens 20 passes through the second lens 30 and forms a beam pattern having a second aspect ratio greater than the first aspect ratio in the longitudinal direction. .

_{In particular, the light L 1} emitted through the first prism surface 23 of the first lens 20 is mainly incident on the first protruding end 34 and is emitted through the second lens 30 of the vertical beam. An upper pattern of the beam pattern is formed.

_{And, some of the light (L 2} ) emitted from the lower end of the first exit surface 22 of the first lens 20 is incident on the second protruding end 35 and is emitted through the second lens 30 . A lower pattern of the beam pattern of the up and down beams is formed.

And, among the light emitted from the first exit surface 22 of the first lens 20 , the light incident on the second incidence surface 32 between the first protruding end 34 and the second protruding end 35 is Or distributed as a whole in the beam pattern of the up and down beams emitted through the second lens 30, L ₁ , It _{partially overlaps with the L 2} light and may form the remaining beam pattern.

The adaptive driving beam module 1 according to the present embodiment may use the first prism surface 23 formed on the first emission surface 22 to emit a vertical beam having an improved luminosity of the upper pattern.

In addition, the extended vertical beam of the upper pattern is emitted using the first prism surface 23 formed on the first emission surface 22 to expand the irradiation range for a long distance and improve remote visibility at the same time.

In addition, by using the first protruding end 34 and the second protruding end 35 of the second lens 30, the up and down beams extended up and down are emitted to expand the irradiation range for long and near distances and at the same time to the front of the vehicle. improve overall visibility.

Hereinafter, an adaptive driving beam module according to a second embodiment of the present invention will be described. For convenience of description, parts similar to those of the first embodiment use the same reference numerals, and descriptions of parts common to the first embodiment are omitted.

2 is a diagram schematically illustrating an adaptive driving beam module according to a second embodiment of the present invention.

The adaptive driving beam module 2 according to the second embodiment of the present invention includes an upper prism lens unit 234 and a lower prism lens unit 235 in the adaptive driving beam module 1 according to the first embodiment described above. includes an added second lens 230 .

The upper prism lens unit 234 overlaps a portion of the second incident surface 32 and is mounted on the first protruding end 34 .

As shown in FIG. 2 , the upper prism lens unit 234 includes a second prism surface 234a extending to be inclined toward the first lens 20 from the image side of the second incident surface 32 . The second prism surface 234a may be formed as an inclined surface facing the optical axis X from the upper side of the second incident surface 32 . The inclination angle of the second prism surface 234a and the design of the upper prism lens unit 234 _{are designed to refract the light L 4} incident on the second prism surface 234a upward compared to the incident angle.

The lower prism lens unit 235 may be formed to be substantially symmetrical with the upper prism lens unit 234 with respect to the optical axis (X).

That is, the lower prism lens unit 235 overlaps a portion of the second incident surface 32 and is mounted on the second protruding end 34 .

As shown in FIG. 2 , the lower prism lens unit 235 includes a third prism surface 235a extending from the lower side of the second incident surface 32 to be inclined toward the first lens 20 . The third prism surface 235a may be formed as an inclined surface facing the optical axis X from the lower side of the second incident surface 32 . The inclination angle of the third prism surface 235a and the design of the lower prism lens unit 235 _{are designed to refract the light L 5} incident to the third prism surface 235a upward compared to the incident angle.

_{As shown in FIG. 2 , some of the light L 4} refracted upward through the first prism surface 23 of the first lens 20 is the second prism surface 234a of the upper prism lens unit 234 . is entered into _{The upper prism lens unit 234 upwardly refracts the light L 4} incident on the second prism surface 234a once again to irradiate it to the outside through the second exit surface 31 .

_{Accordingly, the light L 4} passing through the first prism surface 23 and the second prism surface 234a forms an upper pattern of the beam pattern of the up and down beams emitted through the second lens 230 and at the same time the beam Expand the upper area of the pattern upwards.

As a result, the beam pattern having the first aspect ratio formed by the first lens 20 passes through the second lens 230 and is shifted upward, or a beam having a second aspect ratio greater than the first aspect ratio in the longitudinal direction. will form a pattern.

On the other hand, light emitted from a surface other than the first prism surface 23 among the first exit surfaces 22 of the first lens 20 mainly includes the second incident surface 32 of the second lens 230 and the lower prism. It is incident on the lens unit 235 .

The light incident on the second incident surface 32 is entirely distributed in the beam pattern of the up-and-down beam emitted through the second lens 230 , or is formed on the first prism surface 23 and the second prism surface 234a. It partially overlaps with the upper pattern of the beam pattern of the beam, and the remaining beam pattern may be formed.

_{Some of the light L 5} emitted from the lower end of the first exit surface 22 is incident on the lower prism lens unit 235 .

As shown in FIG. 2 , the lower prism lens unit 235 refracts the light L ₅ incident on the third prism surface 235a upward relative to the incident angle to be emitted through the second exit surface 31 . do.

_{The light L 5} refracted upward by the lower prism lens unit 235 reinforces the central pattern of the beam pattern of the up and down beam emitted through the second lens 230, and increases the luminosity of the central pattern of the beam pattern of the up and down beam. improve

The luminous intensity of the central pattern may be reduced as the upper pattern of the vertical beam is expanded upward by the first prism surface 23 and the upper prism lens unit 234 . However, since the lower prism lens unit 235 _{refracts some light L 5} upward to reinforce the central pattern, the luminous intensity of the central pattern may be improved.

Hereinafter, a beam pattern emitted by the adaptive driving beam module according to the second embodiment of the present invention will be described by comparing it with a conventional vertical beam.

3 is a view showing a conventional beam pattern by irradiating a vertical beam to a screen, and FIG. 4 is a view showing a beam pattern in which a vertical beam of the adaptive driving beam module according to the second embodiment of the present invention is irradiated onto the screen. .

The closed loop lines shown in FIGS. 3 and 4 are lines connecting points having approximately the same luminous intensity in the beam pattern irradiated on the screen, and have progressively higher luminance as they come in from the outside.

As shown in FIG. 3 , the beam pattern A ₁ emitted by the conventional adaptive driving beam forms a pattern that is approximately vertically symmetrical with respect to the cut-off line (a thick line in the horizontal direction of the central portion). In addition, the portion having the highest luminosity has a beam pattern formed in the central region C near the cut-off line. In order to compare and explain the beam pattern (A ₂ ) of FIG. 4 , the height at which the upper end of the _{beam pattern (A 1 ) is located is B H1} It is indicated by a line, and the height at which the lower end of the _{beam pattern (A 1} ) is located is indicated _{by the B H2 line.}

_{Meanwhile, as shown in FIG. 4 , the beam pattern A 2} emitted from the adaptive driving beam module 2 according to the second embodiment of the present invention has an upper pattern compared to _{the beam pattern A 1} of FIG. 3 . This B _{H1 B H2} from line It can be seen that the line extends upward.

_{This is, as described above, the light (L 4} ) passing through the first prism surface 23 and the second prism surface (234a) is refracted upwards B _H1 Line and B _H2 This is because it forms the upper pattern between the lines.

_{In addition, the beam pattern A 2} emitted from the adaptive driving beam module 2 according to the second embodiment of the present invention has a lower pattern B _{L1 compared to the beam pattern A 1} of FIG. 3 . It can be seen that the line moves upward from the line to the B _{L2 line.}

As described above, as the lower prism lens unit 235 _{refracts the light L 5} incident on the third prism surface 235a upward to reinforce the central pattern, B if there is no lower prism lens unit 235 _L1 Line and B _{L2 It is a result of the light (L 5} ) arriving between the lines moving to the central pattern.

Therefore, when comparing the beam patterns of _{A 1} and A _{2 , the A 2} beam pattern forms an upwardly shifted vertical beam pattern compared to the A _{1 beam pattern.}

Also, the lower pattern is B _{L1 B L2} from the line Compared to the length moved to the line, the upper pattern is B _{H1 B H2} from line There are long, go to the line to check that a longer, through which it can be confirmed that the aspect ratio of A ₂ a beam pattern that is more vertical orientation ratios larger than the aspect ratio of the A ₁ beam pattern.

In addition, _{despite the fact that the A 2} beam pattern has a larger aspect ratio in the vertical direction while the overall beam pattern is shifted upward compared _{to the A 1 beam pattern, the hot zone with the highest luminosity (H 2} ) is located near the cut-off line. It can be seen that it is formed in the central region (C) of

This is possible because, as described above, the lower prism lens unit 235 _{refracts the light L 5} incident on the third prism surface 235a upward to reinforce the central pattern.

As described above, the adaptive driving beam module 2 according to the second embodiment of the present invention extends the beam pattern of the up and down beam upwards compared to the prior art, and at the same time, the hot zone H _{2 in the beam pattern A 2} is It emits the beam pattern of the up and down beams maintained in the central area (C) near the cut-off line.

The upper pattern of the beam patterns A _{1 and} A ₂ irradiates a long distance in front of the vehicle, and the upper pattern of the beam pattern A ₂ emitted from the adaptive driving beam module 2 according to the second embodiment is B _H2 As it extends upwards to the line, the light reaches a greater distance, and as a result, the driver's forward visibility is improved.

And, as the beam pattern (A _1, A ₂ ) comes from the upper pattern to the lower pattern, the near-field in front of the vehicle is irradiated. Since the hot zone H ₂ is formed in the central region C, it is possible to realize a beam pattern irradiated to a greater distance and at the same time to form a sufficient luminous intensity even in a short distance.

Meanwhile, the upper prism lens unit 234 and the lower prism lens unit 235 may be integrally formed of the same material as the aspherical lens units 31 , 32 , 34 and 35 of the second lens 230 , but the second lens In order to improve the chromatic aberration of the up and down beams emitted through (30), it may be formed of different materials.

Chromatic aberration is an aberration caused by different refractive indices depending on the wavelength of light. As the chromatic aberration is severe, multiple colors are distributed at the boundary of light, and the boundary appears vague.

In order to improve the chromatic aberration of the beam pattern of the up and down beams, the aspherical lens units 31 , 32 , 33 and 34 of the second lens 230 are formed of polymethyl methacrylate (PMMA) or a material containing PMMA, and the upper prism The lens unit 234 and the lower prism lens unit 235 are formed of PC (polycarbonate) or a material containing PC.

FIG. 5 is an image of a vertical beam irradiated onto a screen when the aspherical lens unit and the upper/lower prism lens unit are made of the same material, and FIG. This is the image projected on the screen.

As confirmed by the images of FIGS. 5 and 6, the image when the upper prism lens unit 234 and the lower prism lens unit 235 are made of different materials has improved chromatic aberration compared to the image when it is made of the same material. It can be seen that the outer boundary of the up and down beams is more clearly expressed.

Hereinafter, an adaptive driving beam module according to a third embodiment of the present invention will be described. For convenience of description, parts similar to those of the second embodiment use the same reference numerals, and descriptions of parts common to the second embodiment are omitted.

7 is a diagram schematically illustrating an adaptive driving beam module according to a third embodiment of the present invention.

In the adaptive driving beam module 2 according to the above-described second embodiment, the upper prism lens unit 234 and the lower prism lens unit 235 are formed to be symmetrical about each other about the optical axis X, whereas the In the adaptive driving beam module 3 according to the third embodiment, the upper prism lens unit 334 and the lower prism lens unit 335 are formed to have a mutually asymmetric shape with respect to the optical axis X.

The functions of the upper prism lens unit 334 and the lower prism lens unit 335 are similar to those of the second embodiment described above, but in this embodiment, the upper prism lens unit 334 and the lower prism lens unit 335 are asymmetrically arranged. By forming it, the beam pattern of the up and down beams can be designed more freely.

That is, by setting the angle of the second prism surface 334a of the upper prism lens unit 334 more variously _{, B H2 of the beam pattern A 2} of the up and down beams (refer to FIG. 4 ) You can adjust the line height.

In addition, by setting the angle of the third prism surface 335a of the lower prism lens unit 335 more variously, a portion in which the luminous intensity is reinforced among _{the beam patterns A 2 of the up and down beams may be changed.}

For example, L _{7 When the third prism surface 335a is designed so that the light is irradiated downward than the L 5} light of the second embodiment, the beam pattern of the adaptive driving beam module 3 according to the present embodiment is the hot zone H ₂ , 4) may be formed below the case of FIG. 4 .

The adaptive driving beam module 3 according to the third embodiment of the present invention asymmetrically forms the second prism surface 334a and the third prism surface 335a to increase the height of the upper pattern of the beam pattern of the up and down beams. It is possible to change the position of the beam pattern of the up and down beams at the same time.

Hereinafter, an adaptive driving beam module according to a fourth embodiment of the present invention will be described. For convenience of description, parts similar to those of the first embodiment use the same reference numerals, and descriptions of parts common to the first embodiment are omitted.

8 is a diagram schematically illustrating an adaptive driving beam module according to a fourth embodiment of the present invention.

As shown in FIG. 8 , in the adaptive driving beam module 4 according to the fourth embodiment of the present invention, the remaining components except for the first lens 420 are the adaptive driving beam module according to the first embodiment described above. Adopt a configuration similar to (1).

In the adaptive driving beam module 1 according to the first embodiment described above, the first prism surface 23 forms an upper portion of the first emission surface 22, whereas the adaptive driving beam module according to the fourth embodiment The first prism surface 423 of (4) forms a lower portion of the first exit surface 22 . That is, the first prism surface 423 is formed to be inclined toward the first incident surface 21 compared to other regions forming the upper portion of the first exit surface 22 .

Similar to the case of the first embodiment described above, the first prism surface 423 may be formed to be spaced apart from the optical axis X by a predetermined distance. However, since the first prism surface 423 according to the present embodiment forms a lower portion of the first emission surface 22, the upper end 423a of the first prism surface 423 is d downward from the optical axis X. It may be formed at points spaced apart by _two. In addition, the lower end of the first prism surface 423 may extend to coincide with the lower end of the first lens 20 . The first prism surface 423 may be formed of a plane forming an inclination, or may include a partially or entirely curved surface.

The first lens 420 according to the present embodiment also forms the light emitted from the light source 10 in a beam pattern having a first aspect ratio and emits it toward the second lens 30 (in the fourth embodiment of the present invention). The first aspect ratio in the description of the adaptive driving beam module 4 according to the first embodiment may have an aspect ratio different from the first aspect ratio in the adaptive driving beam module 1).

The first prism surface 423 of the first lens 420 _{downwardly refracts the light L 1} emitted through the first prism surface 423 to form the second incident surface 32 of the second lens 30 . is entered from the bottom.

Accordingly, the first lens 420 according to the present exemplary embodiment emits a beam pattern having a first aspect ratio having a larger longitudinal ratio compared to a beam pattern emitted by a lens without the first prism surface 423 being formed.

_{As shown in FIG. 8 , a portion of light L 9} refracted downward through the first prism surface 423 of the first lens 420 has a second protruding end (L 9 ) formed below the second incident surface 32 . 35) is entered.

The second protruding end 35 forming the lower portion of the second incident surface 32 extends downwardly refracted light L ₉ through the first prism surface 423 .

_{Then, the light L 9} refracted downward through the first prism surface 423 and emitted to the second exit surface 31 through the second protruding end 35 forms a lower pattern of the beam pattern of the vertical beam. .

The light L ₉ may improve the luminosity of a down-beam pattern among the beam patterns of the up-and-down beam, or may extend a lower region of the beam pattern of the up-down beam to the lower side.

As a result, the beam pattern having the first aspect ratio formed by the first lens 420 passes through the second lens 30 to form a beam pattern having a second aspect ratio greater than the first aspect ratio in the longitudinal direction. (The second aspect ratio in the description of the adaptive driving beam module 4 according to the fourth embodiment of the present invention may have an aspect ratio different from the second aspect ratio in the adaptive driving beam module 1 in the first embodiment. can).

_{And, some of the light (L 8} ) emitted from the upper end of the first exit surface 22 is incident on the first protruding end 34 and is emitted through the second lens 30 , the upper part of the beam pattern of the upper and lower beams. form a pattern

And, among the light emitted from the first exit surface 22 of the first lens 420 , the light incident on the second incidence surface 32 between the first protruding end 34 and the second protruding end 35 is Or distributed as a whole in the beam pattern of the up and down beams emitted through the second lens 30, L ₈ , It _{partially overlaps with the L 9} light and may form the remaining beam pattern.

The adaptive driving beam module 4 according to this embodiment uses the first prism surface 423 formed under the first emission surface 22 to measure the luminosity of the beam pattern below the cut-off line among the beam patterns of the up and down beams. Alternatively, the lower region of the beam pattern of the up and down beams may be extended to the lower side.

9 is a diagram illustrating a beam pattern in which the up and down beams of the adaptive driving beam module according to the fourth embodiment of the present invention are irradiated onto a screen.

_{As shown in FIG. 9 , the beam pattern A 3} emitted from the adaptive driving beam module 4 according to the fourth embodiment of the present invention has a lower pattern B compared to _{the beam pattern A 2} of FIG. 4 . B _{L3 from L2 line} It can be seen that it extends downward to the line.

9, in the adaptive driving beam module 4 according to the fourth embodiment of the present invention, the first prism surface 423 is not formed using the first lens 420 in which the first prism surface 423 is formed. A primary beam pattern having a first aspect ratio having a larger longitudinal ratio than that of a non-removable lens is formed, and the vertical direction ratio is larger than the first aspect ratio using the first protruding end 34 and the second protruding end 35. It can be confirmed that a beam pattern can be formed.

In addition, when comparing the beam pattern of _{A 3} and A _{2 , the hot zone (H 3} ) with the highest luminosity is formed in the central area (C) near the cut-off line, but compared to the beam pattern of _{A 2 , the hot zone (H 3 ) 3} ) is located below.

In the adaptive driving beam module 4 according to the fourth embodiment of the present invention, the lower pattern _{of the beam pattern A 3 is B L2 B L3} from the line Since it extends downward to the line and at the same time the hot zone H ₃ is formed somewhat below, the adaptive driving beam module 2, 3, 4 according to the first, second, and third embodiments for a short distance in front of the vehicle than It can provide an excellent field of view.

The adaptive driving beam module 4 according to the fourth embodiment of the present invention also has the upper prism lens parts 234 and 334 and the lower prism lens part 235, similar to those described in the second and third embodiments described above. 335), and the upper prism lens units 234 and 334 and the lower prism lens units 235 and 335 are formed of different materials from the aspherical lens units 31 and 32 to improve the chromatic aberration of the beam pattern. have.

Hereinafter, an adaptive driving beam module according to a fifth embodiment of the present invention will be described. For convenience of explanation, parts similar to those of the second embodiment use the same reference numerals, and descriptions of parts common to the second embodiment are omitted.

10 is a diagram schematically illustrating an adaptive driving beam module according to a fifth embodiment of the present invention.

Although the first lens 20 on which the first prism surface 23 is formed is used in the adaptive driving beam module 2 according to the second embodiment described above, the adaptive driving beam module according to the fifth embodiment of the present invention (5) uses the first lens 20' in which the first prism surface 23 is not formed.

Since the first prism surface 23 is not formed on the first lens 20', the aspect ratio of the beam pattern emitted through the first lens 20' is that it is emitted through the first lens 20 of the second embodiment. A vertical ratio may be small compared to an aspect ratio of the beam pattern.

However, since the upper prism lens unit 234 formed in the second lens 230 _{upward refracts the light L 10} , the upper region of the beam pattern of the vertical beam may be expanded upward.

Accordingly, the beam pattern having the first aspect ratio formed by the first lens 20 ′ passes through the second lens 230 and is shifted upward, or a beam having a second aspect ratio greater than the first aspect ratio in the longitudinal direction. will form a pattern.

In addition, the lower prism lens unit 235 formed in the second lens 230 refracts the light L ₅ upward relative to the incident angle, thereby reinforcing the central pattern of the beam pattern of the vertical beam and the center of the beam pattern of the vertical beam. Improve the luminosity of the pattern.

Therefore, the beam pattern emitted by the adaptive driving beam module 5 according to the fifth embodiment of the present invention forms a beam pattern having a smaller longitudinal ratio than _{the beam pattern A 2 shown in FIG. 4 ,} A beam pattern extending upwardly may be formed approximately similarly, and a beam pattern shifted upward as a whole rather than _{the conventional beam pattern A 1 shown in FIG. 3 may be formed.}

In the adaptive driving beam module 5 according to the fifth embodiment of the present invention, as described in the above-described third embodiment, the upper prism lens unit 234 and the lower prism lens unit 235 are formed asymmetrically. can

In addition, similar to that described in the second embodiment, the upper prism lens unit 234 and the lower prism lens unit 235 are formed of different materials from the aspherical lens units 31 and 32 to improve the chromatic aberration of the beam pattern. can do.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

1, 2, 3, 4: Adaptive Driving Beam Module 10: Light Source
20: first lens 21: first incident surface
22: first exit surface 23: first prism surface
30: second lens 31: second exit surface
32: second incident surface 33: flange
34: first protruding end 35: second protruding end
234, 334, 434: upper prism lens unit
234a, 334a, 435a: second prism surface
235, 335, 435: lower prism lens unit
235a, 335a, 434a: the third prism face
X: optical axis

Claims (15)

An adaptive driving beam module provided in a headlamp of a vehicle to irradiate a vertical beam and block at least a portion of the vertical beam in an area where a vehicle appearing in front of the vehicle is located, the adaptive driving beam module comprising:
at least one light source;
a first lens including a first incident surface to which the light emitted from the light source is incident and a first exit surface to refract the light incident through the first incident surface to emit light of a beam pattern having a first aspect ratio; and
and a second lens that refracts the beam pattern having the first aspect ratio emitted from the first lens to form a beam pattern of the up and down beams,
The second lens,
an aspherical lens unit including a second incident surface on which some of the light emitted from the first lens is incident; and
Comprising an upper prism lens unit including a second prism surface extending to be inclined toward the first lens from the upper side of the second incident surface,
The adaptive driving beam module, wherein the upper prism lens unit is formed of a material different from that of the aspherical lens unit. According to claim 1,
The adaptive driving beam module, wherein the upper prism lens unit upwardly refracts some of the light incident on the second prism surface to form an upper pattern among the beam patterns of the vertical beam. 3. The method of claim 2,
The upper prism lens unit,
so that the beam pattern of the up and down beam is shifted upward than the beam pattern having the first aspect ratio;
The adaptive driving beam module of claim 1, wherein the beam pattern of the up and down beams has a second aspect ratio having a larger longitudinal ratio than the first aspect ratio. According to claim 1,
The second lens,
The adaptive driving beam module further comprising a lower prism lens unit including a third prism surface extending from a lower side of the second incident surface to be inclined toward the first lens. 5. The method of claim 4,
The adaptive driving beam module, wherein the lower prism lens unit upward refracts some of the light incident on the third prism surface to improve the luminous intensity of a central pattern among the beam patterns of the vertical beam. 5. The method of claim 4,
The adaptive driving beam module, wherein the upper prism lens unit and the lower prism lens unit are formed asymmetrically with respect to an optical axis of the second lens. 5. The method of claim 4,
The adaptive driving beam module, wherein the lower prism lens unit is formed of a material different from that of the aspherical lens unit to reduce chromatic aberration of the beam pattern of the vertical beam. 8. The method of claim 7,
The aspherical lens part is formed of a material containing PMMA (Polymethyl Methacrylate),
At least one of the upper prism lens unit and the lower prism lens unit is formed of a material containing PC (polycarbonate), the adaptive driving beam module. 5. The method of claim 1 or 4,
and the second incident surface is formed as a concave curved surface. According to claim 1,
The first exit surface is formed to be spaced apart from the first incidence surface and is inclined toward the first incidence surface to refract a light path of some of the light passing through the first lens to the periphery of the second lens. 1 An adaptive driving beam module comprising a prism face. 11. The method of claim 10,
The adaptive driving beam module, wherein the first prism surface forms an upper portion of the first exit surface to form an upper pattern among the beam patterns of the vertical beam. 11. The method of claim 10,
The adaptive driving beam module, wherein the first prism surface forms a lower portion of the first exit surface to improve the luminosity of a down-beam pattern among the beam patterns of the up-down beam. delete delete delete

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