KR20230069819A - Illumination device for a motor vehicle headlamp - Google Patents

Abstract

광선들을 방출하도록 구성된 적어도 하나의 광원(50);

광학 본체(100)로서,
- 상기 적어도 하나의 광원(50)으로부터의 광선들을 상기 광학 본체(100) 내로 결합시키기 위한 공통의 광 입력 섹션(110)으로서, 각각의 광원(50)에 할당되어 할당된 광원(50)으로부터의 광선들을 상기 광학 본체(100) 내로 결합시키도록 구성된 적어도 하나의 집광 요소(120)를 갖는 공통의 광 입력 섹션(110),
- 상기 공통의 광 입력 섹션(110)을 통해 상기 광학 본체(100) 내로 결합된 광선들을 상기 조명 장치(10)의 주 방향(X)으로 상기 광학 본체(100) 외부로 분리시키기 위한 광 출력 섹션(130)을 포함하는 바의 광학 본체(100);

광선들을 상기 조명 장치(10)의 전방으로 광선을 투사하도록 구성되는 투사 렌즈 시스템(200);을 포함하고,
상기 적어도 하나의 집광 요소(120)는 상기 광학 본체(100)와 조합하여 적어도 3 세트의 광선 경로(LR1, LR2, LR3)를 제공하고,
상기 제1 및 제2 광선 경로(LR1, LR2)를 따르는 광선들에 의해 기여되는 상기 로우 빔 배광의 제1 부분(LB1)과 상기 제3 광선 경로(LR3)를 따르는 광선들에 의해 기여되는 상기 로우 빔 배광의 제2 부분(LB2)이 로우 빔 배광을 형성하고, 상기 로우 빔 배광(LB)의 수직방향 확장이 V-V 라인을 따라 V-V 라인 쪽으로 적어도 0°로부터 아래로 적어도 -10°까지 확장되는 조명 장치(10).A lighting device (10) for an automobile headlamp for generating a low beam light distribution (LB), wherein the vertical extension of the low beam light distribution (LB) is along the VV line from at least 0° towards the VV line down to at least -10°. Expanded, the lighting device 10:

at least one light source (50) configured to emit light rays;

As the optical body 100,
- a common light input section 110 for coupling the light rays from said at least one light source 50 into said optical body 100, assigned to each light source 50 and from the assigned light sources 50; a common light input section (110) having at least one concentrating element (120) configured to couple light rays into said optical body (100);
- a light output section for splitting the light rays coupled into the optical body 100 via the common light input section 110 out of the optical body 100 in the main direction X of the lighting device 10 a bar optical body 100 comprising 130;

A projection lens system 200 configured to project light rays forward of the lighting device 10;
wherein said at least one light collecting element (120) provides at least three sets of light path paths (LR1, LR2, LR3) in combination with said optical body (100);
a first portion of the low beam distribution LB1 contributed by light rays along the first and second light paths LR1 and LR2 and the light rays contributed by light rays along the third light path LR3; a second part (LB2) of the low beam light distribution forms a low beam light distribution, wherein the vertical extension of the low beam light distribution (LB) extends along the VV line from at least 0° towards the VV line down to at least -10° Lighting device (10).

Description

Lighting device for automobile headlamp {ILLUMINATION DEVICE FOR A MOTOR VEHICLE HEADLAMP}

The present invention is a lighting device for an automobile headlamp for generating low-beam light distribution, wherein vertical expansion of the low-beam light distribution extends along a V-V line from at least 0° toward the V-V line down to at least -10°, the lighting device comprising: Is:

광선들을 방출하도록 구성된 적어도 하나의 광원;

at least one light source configured to emit light rays;

광학 본체로서,

As an optical body,

- a common light input section for coupling light rays from the at least one light source into the optical body, at least one light collecting element assigned to each light source and configured to couple light rays from the assigned light source into the optical body. A common optical input section having

- a light output section for splitting the light rays coupled into the optical body through the common light input section out of the optical body in a main direction of the lighting device;

- an optical body comprising a shell surface defining the optical body, the shell surface being configured to deflect light rays coupled into the optical body, and extending between the common light input section and the light output section. ;

상기 광학 본체의 광 출력 섹션으로부터 방출된 광선들을 수신하기 위해 상기 주 방향을 따라 상기 광학 본체의 하류에 배치된 적어도 하나의 렌즈를 포함한 투사 렌즈 시스템으로서, 광선들을 상기 조명 장치의 전방으로 광선을 투사하도록 구성되는 투사 렌즈 시스템;을 포함하고,

A projection lens system including at least one lens disposed downstream of the optical body along the main direction for receiving light beams emitted from the light output section of the optical body, projecting the beams toward the front of the lighting device. Including; a projection lens system configured to

The projection lens system relates to an illumination device configured to generate a low beam light distribution emitted by the at least one light source and the optical body and the projection lens system.

The invention also relates to a motor vehicle headlamp comprising at least one lighting device according to the invention.

In some cases, particularly when vehicle headlamps require high-intensity high-beam and/or high-intensity low-beam light distribution, the configuration of the corresponding lighting unit requires specific requirements resulting in not meeting the legal requirements for low-beam light distribution. (see, for example, the Official Journal of EU L 250/92 - 22 August 2014).

Improved lighting devices are needed to also meet the requirements for low-beam light distribution in terms of illuminance values and required space illumination on the road.

It is an object of the present invention to provide an improved lighting device.

To achieve this object, the at least one light collecting element provides at least three sets of light ray paths in combination with the optical body;

The optical body has a first set of optical actuations for guiding at least some of the light rays coupled into the optical body through the common light input section from the common light input section to the light output section along a first ray path. including surfaces,

the first set of optical actuation surfaces comprises a first deflection surface and a light exit surface, the first deflection surface being part of the shell surface and the light exiting surface being part of the light output section;

light rays along the first ray path are incident on the first deflection surface and deflected to the light exit surface for coupling out of the optical body;

light rays along the second light ray path are directly incident on the light exit surface from the common light input section;

light rays along the first and second light ray paths serve to create a first portion of a low beam light distribution;

The optical body has a second set of optical actuations for guiding at least some of the light rays coupled into the optical body through the common light input section from the common light input section to the light output section along a third ray path. including surfaces,

The second set of optical actuation surfaces includes a second deflection surface and the light exit surface, the second deflection surface being part of the shell surface and spaced apart from the first deflection surface, the second deflection surface comprising: When the lighting device is properly installed in the vehicle, the upper surface of the optical body is formed as a concave surface,

light rays along the third ray path are incident on the second deflection surface and deflected to the light exit surface for coupling out of the optical body;

rays along the third ray path serve to create a second portion of a low beam light distribution;

a first portion of the low-beam distribution contributed by rays along the first and second ray paths and a second portion of the low-beam distribution contributed by rays along the third ray path , wherein the vertical extension of the low beam distribution extends from at least 0° toward the V-V line down to at least -10° along the V-V line.

Advantageously, the lighting device comprises at least two light sources, and the common light input section comprises at least two light collecting elements each assigned to one light source.

Advantageously, the light sources are arranged in at least one row along a horizontal straight line, and the corresponding light collecting elements are arranged in rows along a horizontal straight line, the horizontal straight line being substantially perpendicular to the main direction.

Advantageously, said at least one light source is formed from an LED.

Advantageously, said at least one light collecting element is formed as a TIR lens.

Advantageously, the light exit surface and the shell surface intersect at a common surface section line, which common surface section line forms an asymmetric cut-off boundary for low beam light distribution.

Advantageously, said projection lens system comprises an optical axis, and said light exit surface has a surface vector, said surface vector being inclined with respect to said optical axis of said projection lens system.

Advantageously, the projection lens system comprises a curved focal surface, preferably a Petzval-surface, wherein the light exit surface is inclined with respect to the curved focal surface, such that the common surface section line only to be placed on the curved focal surface.

Advantageously, the surface vector of the light exit surface slopes upward when viewed with the lighting device correctly installed in the vehicle.

Advantageously, said at least one light collecting element has a curved light input surface for coupling light rays from an assigned light source into an optical body, said curved light input surface comprising a central section having a convex shape.

Advantageously, the curved light input surface of said at least one light collecting element comprises a first deflection section corresponding to a second deflection surface, said first deflection section directing light rays incident on said first deflection section to said first deflection section. It is configured to deflect with 2 deflection surfaces.

Advantageously, the first deflection section has a curvature opposite to that of the central section of the curved light input surface, preferably a concave curvature.

Advantageously, said at least one light collecting element comprises a second deflection section corresponding to said first deflection surface, said second deflection section deflecting light rays incident on said second deflection section to said first deflection surface. wherein light rays follow a fourth ray path when incident on the second deflecting section, the fourth ray path contributing to low beam light distribution.

Advantageously, said at least one light source emits light rays in a luminous direction, and said at least one light source is arranged in such a way that said luminous direction is not parallel to the main direction of the lighting device.

The term "light emitting direction" should be understood as the direction in which at least one light source emits the most or strongest light due to its directionality, ie the direction in which the highest luminous flux exists.

The object of the invention is also solved by a motor vehicle headlamp comprising at least one lighting device according to the invention.

The object can also be achieved by a motor vehicle headlamp comprising at least one lighting device according to the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further explain the present invention, illustrative and non-limiting embodiments are discussed below, as shown in the drawings briefly described herein.
1 is an isometric view of an example of a lighting device comprising light sources, an optical body into which light rays of the light sources may be coupled, and a projection lens configured to project the separated rays of light of the optical body onto a front surface of the lighting device.
Fig. 2 is a sectional view of the optical body of the lighting device of Fig. 1, wherein the optical body includes a light input section and a light output section;
FIG. 3A is a detailed view of an example of a light input section of the lighting device of FIG. 1 .
FIG. 3b is a detailed view of another example of a light input section of the lighting device of FIG. 1 .
FIG. 4 is a diagram illustrating an example of low beam light distribution generated by the lighting device of FIG. 1 .
5 is a front view of a light output section of an optical body of the lighting device of FIG. 1;
FIG. 6 is a rear view of a light input section of the lighting device of FIG. 1 .

1 shows an example of a lighting device 10 for a motor vehicle headlamp for generating a low beam light distribution LB, wherein the vertical extension of the low beam light distribution is at least along the V-V line towards the V-V line. It extends from 0° down to at least -10°, which can be seen in more detail in FIG. 4 .

The lighting device 10 comprises an optical body comprising light sources 50 configured to emit light rays, a common light input section 110 for coupling the light rays from the light sources 50 into the optical body 100. 100, and the light source is formed of an LED.

The common light input section 110 has condensing elements 120, each of which is assigned to a respective light source 50 to direct light rays from the assigned light sources 50 to the optical body 100. It is designed to be incorporated into

In addition, the optical body 100 decoupling the light rays coupled into the optical body 100 through the common light input section 110 out of the optical body 100 in the main direction X of the lighting device 10. ) and a light output section 130 for

The light sources 50 are arranged only in one line along a horizontal straight line, and the corresponding condensing elements 120 are arranged only in one line along a horizontal straight line, and the horizontal straight lines are substantially perpendicular to the main direction X, which is, for example, an optical body ( 100) can be seen in FIG. 6 showing a rear view.

The optical body 100 also includes a shell surface 140 extending between the common light input section 110 and the light output section 130, thereby defining the optical body 100, the shell surface 140 ) is preferably configured to deflect light rays that are coupled into the optical body 100 by total internal reflection.

The lighting device 10 also includes at least one lens (shown as a projection lens system 200 including exactly one lens in the illustrated example), the projection lens system 200 is configured to project light rays forward of the lighting device 10, the projection lens system 200 is a light source 50 and the optical body 100 are configured to generate a low beam light distribution LB that is irradiated by the projection lens system 200 .

As can be seen in FIG. 2, light collecting element 120 is combined with optical body 100 to provide four sets of light paths LR1, LR2, LR3, LR4, optical body 100 having a common light A first for guiding at least some of the light rays coupled into the optical body 100 through the input section 110 from the common light input section 110 to the light output section 130 along the first light ray path LR1. It includes a set of optical working surfaces.

The first set of optical actuation surfaces includes a first deflection surface 310 and a light exit surface 300, wherein the first deflection surface 310 is part of the shell surface 140 and the light exit surface 300 is part of the light output section 130 .

Light rays along the first ray path LR1 are incident on the first deflection surface 310 and deflected to the light exit surface 300 for coupling out of the optical body 100 and follow the second ray path LR2. Light rays are incident on the light exit surface 300 directly from the common light input section 110, wherein the light rays along the first, second and fourth light ray paths LR1, LR2, and LR4 form a first beam of low beam light distribution. The first part LB1 of this low beam distribution can be seen in FIG. 4 .

The optical body 100 directs at least some of the light rays coupled into the optical body 100 through the common light input section 110 from the common light input section 110 to the light output section along the third ray path LR3. and a second set of optical actuation surfaces for guiding to (130).

The second set of optical actuation surfaces includes a second deflection surface 320 and a light exit surface 300, wherein the second deflection surface 320 is part of the shell surface 140 and the first deflection surface 310 , the second deflection surface 320 is the upper surface of the optical body 100 and is formed as a concave surface, with the lighting device 10 correctly installed in the vehicle.

Light rays along the third ray path LR3 are incident on the second deflection surface 320 and deflected to the light exit surface 300 for coupling out of the optical body 100, where the third ray path LR3 The rays that follow serve to create a second part LB2 of the low beam distribution, which can also be seen in FIG. 4 .

a first portion of the low-beam distribution contributed by light rays along the first and second ray paths LR1 and LR2 and a second portion of the low-beam distribution contributed by light rays along the third ray path LR3 Forming this low beam distribution, wherein the vertical extension of the low beam distribution extends along the V-V line from at least 0° towards the V-V line down to at least -10°, as can be seen in FIG. 4 .

The light collecting elements 120 also have curved light input surfaces for coupling light rays from the assigned light sources 50 into the optical body 100, where the curved light input surfaces can be seen in FIG. 3B as well as FIG. 3A. and a central section 122 having a convex shape, wherein both views of FIGS. 3a and 3b show different embodiments of the lighting device 10 or optical body 100 .

The curved light input surface of the light collecting element 120 shown in FIG. 3B includes a first deflection section 121 corresponding to the second deflection surface 320 of the optical body 100, and the first deflection section 121 ) is configured to deflect light rays incident on the first deflection section 121 to the second deflection surface 320, where the rays travel along the third ray path LR3 when incident on the first deflection section 121. and the third light ray path LR3 contributes to low beam light distribution.

The first deflection section 121 has a curvature opposite to that of the central section 122 of the curved light input surface, preferably a concave curvature.

The light collecting element 120 of the embodiment shown in FIGS. 3B and 2 includes a second deflection section 123 corresponding to the first deflection surface 310 of the optical body 100, and the second deflection section 123 is configured to deflect light rays incident on the second deflection section 123 to the first deflection surface 310, where the rays follow a fourth ray path LR4 when incident on the second deflection section 123 , the fourth light ray path LR4 contributes to the first part LB1 of the low beam light distribution.

In addition, the light sources 50 emit light rays in a light emitting direction X1, wherein at least one light source 50 shown in the embodiment of FIGS. 2 and 3B has a light emitting direction X1 in the lighting device 10 ) in a non-parallel manner with the main direction X. In contrast, in the embodiment shown in FIG. 3A, the light emitting direction X1 is parallel to the main direction X, the condensing elements 120 shown in FIG. 3A are formed of TIR lenses, and the condensing elements 120 shown in FIG. 3B are formed of TIR lenses. Element 120 can be viewed as a modified TIR-lens.

Referring back to Fig. 2, the light exit surface 300 of the optical body 100 and the shell surface 140 intersect at a common surface section line 150, and the common surface section line 150 is the low beam light distribution Forms an asymmetric cut-off boundary for A common surface section line 150 can be seen in FIG. 5 showing the optical body 100 in a front view. As can be clearly seen, the common surface section line 150 is configured to create an asymmetric cutoff boundary in low beam distribution.

In addition, the projection lens system 200 includes an optical axis A, and the light exit surface 300 has an imaginary surface vector V, which surface vector V is the optical axis of the projection lens system 200 ( A), the surface vector V of the light exit surface 300 is inclined upward, as seen in the correct installation of the lighting device 10 in the vehicle and shown in FIG. Surface 300 faces upwards.

The projection lens system 200 also includes a curved focal surface F, preferably a Petzval-surface, wherein the light exit surface 300 is inclined relative to the curved focal surface F. , so that only the common surface section line 150 is disposed on the curved focal surface F.

lighting device... 10
light source... 50
optical body... 100
Common optical input section… 110
light-gathering element... 120
First deflection section... 121
Center section... 122
Second deflection section... 123
Light output section… 130
shell surface... 140
Common surface section lines… 150
Projection lens system… 200
Light exit surface... 300
first deflection surface... 310
second deflection surface... 320
optical axis... A
The curved focal surface... F
light distribution... LB
1st part of light distribution... LB1
Second part of light distribution... LB2
A set of ray paths... LR1, LR2, LR3, LR4
surface vector… V
main direction… X
Emission direction... X1

Claims (15)

A lighting device (10) for an automobile headlamp for generating a low beam light distribution (LB), wherein the vertical extension of the low beam light distribution (LB) is along the VV line from at least 0° towards the VV line down to at least -10°. Expanded, the lighting device 10:

at least one light source (50) configured to emit light rays;

As the optical body 100,
- a common light input section 110 for coupling the light rays from said at least one light source 50 into said optical body 100, assigned to each light source 50 and from the assigned light sources 50; a common light input section (110) having at least one concentrating element (120) configured to couple light rays into said optical body (100);
- a light output section for splitting the light rays coupled into the optical body 100 via the common light input section 110 out of the optical body 100 in the main direction X of the lighting device 10 (130),
- a shell surface (140) extending between the common light input section (110) and the light output section (130) and thereby defining the optical body (100), the rays of which are coupled into the optical body (100) an optical body (100) of a bar comprising a shell surface (140) configured to deflect beams;

A projection lens system including at least one lens disposed downstream of the optical body 100 along the main direction X for receiving light rays emitted from the light output section 130 of the optical body 100 ( 200), comprising: a projection lens system 200 configured to project light rays toward the front of the lighting device 10;
The projection lens system (200) is configured to generate a low beam light distribution (LB) illuminated by the at least one light source (50) and the optical body (100) and the projection lens system (200). In (10),
wherein said at least one light collecting element (120) provides at least three sets of light path paths (LR1, LR2, LR3) in combination with said optical body (100);
The optical body 100 directs at least some of the light rays coupled into the optical body 100 through the common light input section 110 to the common light input section 110 along a first light ray path LR1. a first set of optical actuation surfaces for guiding from to the light output section (130);
The first set of optical working surfaces includes a first deflection surface 310 and a light exit surface 300, the first deflection surface 310 being part of the shell surface 140, the light exit surface 300 is part of the light output section 130;
Light rays along the first ray path (LR1) are incident on the first deflection surface (310) and deflected to the light exit surface (300) for coupling out of the optical body (100);
Light rays along the second light path LR2 are directly incident on the light exit surface 300 from the common light input section 110,
light rays along the first and second light beam paths (LR1, LR2) contribute to generating a first part (LB1) of a low beam light distribution;
The optical body 100 directs at least some of the light rays coupled into the optical body 100 through the common light input section 110 to the common light input section 110 along a third light ray path LR3. a second set of optical actuation surfaces for guiding from to the light output section (130);
The second set of optical actuation surfaces includes a second deflection surface 320 and the light exit surface 300, the second deflection surface 320 being part of the shell surface 140 and the first deflection surface 320. away from the surface 310, the second deflection surface 320 is the upper surface of the optical body 100 and is formed as a concave surface, with the lighting device 10 correctly installed in the vehicle;
light rays along the third ray path (LR3) are incident on the second deflection surface (320) and deflected to the light exit surface (300) for coupling out of the optical body (100);
light rays along the third light ray path (LR3) serve to create a second part (LB2) of the low beam light distribution;
a first part of the low beam distribution LB1 contributed by light rays along the first and second light paths LR1 and LR2 and the light rays contributed by light rays along the third light path LR3; a second part (LB2) of the low beam light distribution forms a low beam light distribution, the vertical expansion of the low beam light distribution (LB) extending along the VV line from at least 0° towards the VV line down to at least -10° Lighting device (10), characterized in that. 2. The method according to claim 1, wherein the lighting device (10) comprises at least two light sources (50) and the common light input section (110) comprises at least two light collecting elements (each assigned to one light source (50)). A lighting device (10) characterized in that it comprises 120). 3. The method of claim 2, wherein the light sources (50) are arranged only in a line along a horizontal straight line, and the corresponding condensing elements (120) are arranged only in a line along a horizontal straight line, the horizontal straight line being in the main direction (X). A lighting device (10) characterized in that it is substantially vertical. 4. The lighting device (10) according to any one of claims 1 to 3, characterized in that the at least one light source (50) is formed of an LED. 5. The lighting device (10) according to any one of claims 1 to 4, characterized in that the at least one condensing element (120) is formed as a TIR lens. 6. The method of claim 1 , wherein the light exit surface ( 300 ) and the shell surface ( 140 ) intersect at a common surface section line ( 150 ), the common surface section line ( 150 ) A lighting device (10) characterized in that forms an asymmetrical cutoff boundary for low beam light distribution (LB). 7. The method according to any one of claims 1 to 6, wherein the projection lens system (200) comprises an optical axis (A), the light exit surface (300) has a surface vector (V), and the surface vector ( V) is inclined with respect to the optical axis (A) of the projection lens system (200). 8. The method according to claim 6 or 7, wherein the projection lens system (200) comprises a curved focal surface (F), preferably a Petzval surface, and the light exit surface (300) comprises the curved focal surface ( F), so that only the common surface section line (150) is disposed on the curved focal surface (F). 9. Lighting device (10) according to claim 8, characterized in that the surface vector (V) of the light exit surface (300) slopes upward when viewed with the lighting device (10) correctly installed in the vehicle. . 10. The method of claim 1, wherein the at least one light collecting element (120) has a curved light input surface for coupling light rays from an assigned light source (50) into the optical body (100). , wherein the curved light input surface comprises a central section 122 having a convex shape. 11. The method of claim 10, wherein the curved light input surface of the at least one light collecting element (120) comprises a first deflection section (121) corresponding to a second deflection surface (320), wherein the first deflection section (121) ) is configured to deflect light rays incident on the first deflection section (121) to the second deflection surface (320). 12. Lighting device (10) according to claim 11, characterized in that the first deflection section (121) has a curvature opposite to that of the central section (122) of the curved light input surface, preferably a concave curvature. . 13. The method of claim 11 or 12, wherein the at least one light collecting element (120) comprises a second deflection section (123) corresponding to the first deflection surface (310), wherein the second deflection section (123) is configured to deflect light rays incident on the second deflection section 123 to the first deflection surface 310, and when the light rays are incident on the second deflection section 123, a fourth ray path LR4 , wherein the fourth ray path (LR4) contributes to the low beam light distribution (LB). 14. The method of claim 1, wherein the at least one light source (50) emits light rays in a light emitting direction (X1), and the at least one light source (50) emits light rays in the light emitting direction (X1). A lighting device (10), characterized in that it is arranged in a non-parallel way with the main direction (X) of the lighting device (10). 15. A motor vehicle headlamp comprising at least one lighting device (10) according to any one of claims 1 to 14.

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