CN106764810B - Transparent optical conductor with shading effect and application thereof - Google Patents
Transparent optical conductor with shading effect and application thereof Download PDFInfo
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- CN106764810B CN106764810B CN201710022825.7A CN201710022825A CN106764810B CN 106764810 B CN106764810 B CN 106764810B CN 201710022825 A CN201710022825 A CN 201710022825A CN 106764810 B CN106764810 B CN 106764810B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The utility model provides a transparent optical conductor and car light lighting system of utensil shading effect, transparent optical conductor (5) are equipped with diaphragm structure (5 a), including incident surface (5 b), emergent surface (5 c) and upper and lower plane of reflection (5 d,5 e), some incident ray shines reflecting surface (2 a) of speculum (2) and is directly reflected to lens (4), form partly of illumination light shape, another part incident ray shines incident surface (5 b) and refracts inside the optical conductor of transparent optical conductor (5), pass through lens (4) through emergent surface (5 c) refraction again through incident surface (5 b), form partly of illumination light shape, another part incident ray refracts last plane (5 d) through incident surface (5 b), behind reflection emergent surface (5 c), also project to the road surface behind the lens, form partly of illumination light shape. The other part of the incident light irradiates the reflecting surface (2 a) of the reflector (2), is reflected to the upper reflecting surface (5 d), is reflected to the lens (4) and forms the other part of the illumination light shape. According to the present invention, the light-dark cutoff line is formed by the transparent light conductor having the function of changing the light path instead of the light-shielding plate of the prior art, and the overall light efficiency of the projection type illumination system is improved.
Description
Technical Field
The invention relates to a projection type lighting system for a car lamp, in particular to a transparent light conductor with a shading effect and a projection type lighting system for the car lamp, wherein the transparent light conductor and the projection type lighting system for the car lamp use the transparent light conductor with the effect of changing a light path to replace a shading plate in the prior art to form a light and shade cut-off line, and meanwhile, light rays which are originally shaded or reflected by the shading plate to become stray light are reused to participate in lighting through 3 ways, so that the overall lighting effect of the projection type lighting system is improved.
Background
A projection lighting system commonly used in an automobile lamp generally includes a light source 1, a reflector 2, a light shielding plate 3 and a lens 4 as shown in fig. 1, wherein the light shielding plate 3 is provided with a diaphragm structure 3a. The reflecting mirror is in an ellipsoidal shape, the light emitting center of the light source is arranged at the near focus of the ellipsoidal reflecting mirror, light emitted by the light source is converged near the far focus of the ellipsoidal reflecting mirror after being reflected by the ellipsoidal reflecting mirror, the light shielding plate is arranged at the far focus of the ellipsoidal reflecting mirror, and finally a parallel light illumination light shape with a light and dark cut-off line is formed through the lens.
As shown in fig. 2 and 3, the light-dark cut-off lines necessary for the light shapes of the low beam of the headlight, the fog light, etc. are formed by the blocking of the diaphragm structures 3a, the shapes of the diaphragm structures 3a correspond to the light-dark cut-off linear shapes required for the respective different lighting functions, as shown in fig. 10, the light-dark cut-off line a of the low beam light shape is shown, and the light-dark cut-off line of the fog light is shown as the horizontal line, as shown in B of fig. 11.
The conventional projection lighting system has several disadvantages in that the stop structure 3a provided on the light shielding plate 3 is used to form the cutoff line:
1. a part of the light rays blocked by the diaphragm structure 3a cannot be reused, and only a part of the light rays F1 is used for road illumination, resulting in loss of light energy.
2. The light rays blocked by the diaphragm structure 3a are partially absorbed by the light blocking plate 3 and partially reflected, and the reflected light rays F2 are uncontrolled, so that the light rays are reflected by other parts in the lamp and then irradiate the road surface to form the risk of stray light.
3. The light reflected by the diaphragm structure 3a also illuminates other functional areas, such as turn light or position light functional areas, causing inter-functional light leakage defects.
4. Since the angle of illumination of the light source is generally not less than 180 degrees, a portion of the light cannot reach the reflector, resulting in loss of light energy.
Disclosure of Invention
In order to solve the above problems, the present invention provides a projection type illumination system for a vehicle lamp, and more particularly, to a transparent light conductor having a light shielding function, a light path system formed by the transparent light conductor, a projection type illumination system for a vehicle lamp, and a vehicle headlamp thereof.
The transparent light conductor with shading function of the invention has the following technical proposal:
a transparent light conductor having a light-shielding effect, which is provided between a light source 1 and a lens 4,
the transparent light conductor 5 is provided at its exit side near the lens 4 with a diaphragm structure 5a for forming a cutoff line,
the transparent photoconductor 5 is a rectangular block with a stepped upper part and a stepped lower part in cross section,
the transparent photoconductor 5 is formed with an incident surface 5b, an exit surface 5c, and upper and lower reflection surfaces 5d,5e,
a part of the incident light beam is irradiated to the reflecting surface 2a of the reflector 2 and is directly reflected to the lens 4, forming a part G1 of the illumination light pattern G.
A transparent light guide body having a light shielding effect according to the present invention is characterized in that,
the transparent light conductor forms a light path system as follows:
another part of the incident light irradiates the incident surface 5b of the transparent optical conductor 5 and is refracted into the optical conductor 5, and is then refracted to the exit surface 5c through the upper reflection surface 5d or reflected to the exit surface 5c through the exit surface 5c, and is refracted to the lens 4 through the exit surface 5c, and is projected to the road surface through the lens 4, another part G2 (fig. 7) of the illumination light shape is formed, and the light which is not refracted to the lens (4) through the exit surface (5 c) becomes a part H1 of stray light.
A further part of the incident light beam strikes the reflecting surface 2a of the reflector 2, is reflected by the upper reflecting surface 5d, is refracted to the lower reflecting surface 5e, is refracted again by the lower reflecting surface 5e to the lens 4, and then forms a further part G3 of the illumination light pattern (fig. 8).
Another part of the incident light beam is irradiated to the reflecting surface (2 a) of the reflector (2), reflected to the upper reflecting surface (5 d), reflected to the lens (4), and then forms another part G4 of the illumination light pattern (fig. 9).
And the other part of the incident light irradiates the reflecting surface (2 a) of the reflector (2), is reflected to the upper reflecting surface (5 d) and then is refracted into the transparent light conductor (5) to form a light path change, and the light after the light path change is totally reflected by the emergent surface 5c or is refracted downwards by the lower reflecting surface 5e to form a part H2 of the stray light so as to form a light and shade cut-off line.
The stray light is partially refracted by the lower reflecting surface 5e to form a part of H2, and does not participate in road illumination.
A transparent light guide body having a light-shielding effect according to the present invention is characterized in that,
the upper reflecting surface 5d and the lower reflecting surface 5e of the transparent light conductor 5 are respectively planes.
A transparent light guide body having a light shielding effect according to the present invention is characterized in that,
the upper reflecting surface (5 d) of the transparent light conductor (5) is in a step type high part and a step type low part, and the high part and the low part are in transition in an inclined shape.
A transparent light guide body having a light-shielding effect according to the present invention is characterized in that,
the height difference of the two stepped parts of the transparent photoconductor 5 is 1-3 mm.
Preferably, the height difference of the stepped high and low portions of the transparent photoconductor 5 is 1.2 to 1.5mm.
A transparent light guide body having a light-shielding effect according to the present invention is characterized in that,
the incident surface 5a and the exit surface 5c of the transparent photoconductor 5 are convex arcs.
A transparent light guide body having a light-shielding effect according to the present invention is characterized in that,
the incidence surface of the step-shaped high part of the transparent photoconductor 5 is higher than that of the low part is inclined.
A transparent light guide body having a light-shielding effect according to the present invention is characterized in that,
the light incident into the transparent light guide body 5 through the reflecting surface 5d forms a cutoff line of light and shade due to a change in the light path, and a part of the light refracted to the exit surface 5c is totally reflected and finally irradiated below the transparent light guide body.
A transparent light guide body having a light shielding effect according to the present invention is characterized in that,
the diaphragm structure 5a is arranged on the exit light side of the transparent photoconductor.
A transparent light guide body having a light-shielding effect according to the present invention is characterized in that,
the light source 1 is a semiconductor light emitting chip.
A transparent light guide body having a light shielding effect according to the present invention is characterized in that,
the transparent light conductor 5 is made of glass materials and is formed by firing, rolling or transparent plastics are adopted for injection molding.
The invention also provides a projection type lighting system for a vehicle lamp,
the transparent photoconductor having a light-shielding effect is used.
The present invention also provides a headlamp using the projection type lighting system for a vehicle lamp.
The invention has the following beneficial effects: the transparent light conductor with the function of changing the light path of the vehicle replaces a light screen in the prior art to form a light and shade cut-off line, and meanwhile, light rays which are originally shielded or reflected by the light screen to become stray light are reused through 3 ways to participate in illumination, so that the overall light efficiency of the projection type illumination system is improved. Route 1: a part of the light which does not reach the reflecting surface reaches the incident surface of the transparent light guide body 5, is refracted to the lens 4 through the exit surface 5c after propagating in the transparent light guide body, and participates in road illumination. Route 2: a part is reflected by the reflecting surface 2a of the reflector 2 to the upper reflecting surface 5d of the transparent light conductor 5, and is reflected by the reflecting surface 5d to the lens 4, and participates in road illumination. Route 3: a part is reflected by the reflection surface 2a of the mirror 2 to the upper reflection surface 5d of the transparent light conductor 5, refracted by the reflection surface 5d to the inside of the transparent light conductor 5, and refracted to the lens 4 via the lower reflection surface 5e, and participates in road illumination. By the above approach, another beneficial effect of increased light efficiency is reduced uncontrolled stray light.
Drawings
Fig. 1 is a schematic view of a projection type lighting system commonly used in a vehicle lamp.
Fig. 2 and 3 are schematic diagrams of cut-off lines of light and dark necessary for forming light shapes such as a low beam of a headlamp and a fog lamp by shielding of the diaphragm structure 3a.
Fig. 4 is an assembly view of a projection lighting system for a vehicle lamp according to the present invention.
FIG. 5 is a schematic view of the light refraction and projection of the light guide body and the illumination system of the present invention.
FIG. 6 is a schematic view of the light refraction and projection of the light guide body and the illumination system of the present invention.
FIG. 7 is a schematic view of the light refraction and projection of the light guide body and illumination system of the present invention.
FIG. 8 is a schematic view of the light refraction and projection of the light guide body and illumination system of the present invention.
FIG. 9 is a schematic view of the light refraction and projection of the light guide body and illumination system of the present invention.
FIG. 10 is a schematic diagram of a cut-off line A of a low beam shape.
Fig. 11 is a schematic diagram in which a cut-off line between light and dark of the fog lamp is a horizontal line.
In the figure, 1 is a light source, 2 is a reflector, 2a is a reflecting surface 2a and 3 of the reflector 2 are light shading plates, 3a is a diaphragm structure, 4 is a lens, 5 is a transparent optical conductor, 5a is the diaphragm structure, 5b is an incident surface, 5c is an emergent surface, and 5d and 5e are upper and lower reflecting surfaces of the transparent optical conductor respectively. A is the cut-off line of the dipped beam shape and B is the cut-off line of the fog lamp. F1 is the illumination light of the conventional projection illumination system, and F2 is stray light. G is the illumination light of the illumination system of the present invention, which is divided into G1, G2, G3, and G4 according to its source, and H is the stray light of the illumination system of the present invention, which is divided into H1 and H2 according to its source.
Detailed Description
Examples
As shown in fig. 4,5, the illumination system of the present invention includes a light source 1, a reflector 2, a transparent light conductor 5, and a lens 4. The transparent light conductor 5 is provided with a diaphragm structure 5a for forming a bright-dark cut-off line. The transparent photoconductor 5 is further provided with an incident surface 5b, an exit surface 5c, and upper and lower reflecting surfaces 5d, 5e. The light source 1 is preferably a semiconductor light emitting chip, and a part of light emitted from the light source 1 is irradiated to the reflecting surface 2a of the reflector 2 and reflected, and a part thereof is reflected to the lens 4 and a part thereof is reflected to the upper reflecting surface 5d, as shown in fig. 5. A part of the light is irradiated to incident surface 5b of transparent light guide body 5 and refracted inside light guide body 5.
A part of the light refracted into light guide body 5 is refracted through incident surface 5b or reflected through upper reflecting surface 5d to exit surface 5c, refracted through exit surface 5c to lens 4, passed through lens 4, and projected to the road surface, forming a part of the illumination light pattern (fig. 7).
Still another part of the incident light beam is irradiated to the reflection surface 2a of the reflector 2, reflected to the upper reflection surface 5d, refracted to the lower reflection surface 5e, refracted to the lens 4 again by the lower reflection surface 5e, and then formed into a still another part of the illumination light shape (fig. 8).
The other part of the incident light beam irradiates the reflecting surface (2 a) of the reflector (2), is reflected to the upper reflecting surface (5 d), is reflected to the lens (4), and forms the other part G4 (figure 9) of the illumination light shape.
The light passing through the reflecting surface 5d into the transparent light guide body 5 is an important principle of forming a light and dark cut-off line due to the change of the light path, wherein a part of the light refracted to the emergent surface 5c is totally reflected due to the incident angle being larger than the total reflection angle, and finally irradiates the lower part of the transparent light guide body to form stray light H2 which cannot reach the lens 4, thereby not participating in road illumination and being uncontrollable light.
Part of the light rays refracted to the lower reflecting surface 5e are refracted to the lens 4 through the lower reflecting surface 5e to form part of the illumination light shape, but after being refracted twice through the upper reflecting surface 5d and the lower reflecting surface 5e, the light path is changed, and the important principle of forming a light and shade cut-off line is also formed.
According to the invention, the projection type lighting system for the transparent optical conductor and the vehicle lamp thereof replaces a light shading plate in the prior art with the transparent optical conductor with the light shading effect to form a light and shade cutoff line, and meanwhile, the light rays which are originally shaded or reflected by the light shading plate to become stray light are reused to participate in lighting through 3 ways, so that the overall lighting effect of the projection type lighting system is improved.
Claims (8)
1. A transparent light conductor with a light-shielding effect, which is arranged between a light source (1) and a lens (4),
the transparent light conductor (5) is provided with a diaphragm structure (5 a) for forming a light and dark cut-off line on the emergent light side close to the lens (4),
the transparent optical conductor (5) is a rectangular block with a stepped high part and a stepped low part in cross section,
the transparent light guide body (5) is formed with an incident surface (5 b) on the light incident side, an exit surface (5 c) on the light exit side, and upper and lower reflecting surfaces (5 d), (5 e),
a part of the incident light is irradiated to a reflecting surface (2 a) of a reflector (2) and is directly reflected to a lens (4) to form a part (G1) of the illumination light shape,
the transparent light guide forms a light path as follows: one of the rest parts of the incident light irradiates the incident surface (5 b) of the transparent optical conductor (5) and is refracted into the optical conductor (5), and then is refracted or is reflected to the emergent surface (5 c) through the upper reflecting surface (5 d), is refracted to the lens (4) through the emergent surface (5 c), is projected to the road surface through the lens (4), forms the other part (G2) of the illumination light shape, and the light which is not refracted to the lens (4) through the emergent surface (5 c) becomes a part (H1) of the stray light,
the rest two of the incident light beam irradiate the reflecting surface (2 a) of the reflector (2), are reflected to the upper reflecting surface (5 d), are refracted to the lower reflecting surface (5 e), are refracted to the lens (4) through the lower reflecting surface (5 e) to form another part (G3) of the illumination light shape,
the rest three parts of the incident light beam irradiate the reflecting surface (2 a) of the reflector (2), are reflected to the upper reflecting surface (5 d) and then are reflected to the lens (4) to form another part (G4) of the illumination light shape,
the rest four of the incident light rays irradiate the reflecting surface (2 a) of the reflector (2), are reflected to the upper reflecting surface (5 d) and then are refracted into the transparent light conductor (5) to form a light path change, the light rays with the changed light path are totally reflected by the emergent surface 5c or are refracted downwards firstly by the lower reflecting surface (5 e) to form another part (H2) of stray light, and a light and shade cut-off line is formed,
the incidence surface part of the step-shaped high part of the transparent light conductor (5) is higher than that of the low part is inclined.
2. A transparent optical conductor having a light-shielding effect as claimed in claim 1,
the upper reflecting surface (5 d) and the lower reflecting surface (5 e) of the transparent light conductor (5) are planes respectively.
3. A transparent optical conductor having a light-shielding effect as claimed in claim 1 or 2,
the upper reflecting surface (5 d) of the transparent light conductor (5) is in a step type high part and a step type low part, and the high part and the low part are in transition in an inclined shape.
4. A transparent optical conductor having a light-shielding effect according to claim 3,
the height difference of the two stepped parts of the transparent light conductor (5) is 1-3 mm.
5. A transparent optical conductor having a light-shielding effect as claimed in claim 1,
the incident surface 5a and the emergent surface 5c of the transparent optical conductor 5 are convex arcs.
6. A transparent optical conductor having a light-shielding effect as claimed in claim 1,
the light rays entering the inside of the transparent light conductor (5) through the reflecting surface (5 d) form a light and dark cut-off line due to the change of the light path, and a part of the light rays are refracted to the emergent surface (5 c) to generate total reflection and finally irradiate the lower part of the transparent light conductor.
7. A projection type illumination system for a vehicle lamp, comprising a light source (1), a reflector (2) provided beside the light source (1), and a lens (4) provided on the outgoing light side, characterized in that a transparent light conductor having a light-shielding effect as claimed in any one of claims 1 to 6 is used.
8. A headlamp characterized by using the projection type lighting system for a vehicle lamp according to claim 7.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022825.7A CN106764810B (en) | 2017-01-12 | 2017-01-12 | Transparent optical conductor with shading effect and application thereof |
| PCT/CN2017/083411 WO2018129841A1 (en) | 2017-01-12 | 2017-05-08 | Transparent photoconductor having light shielding function, and application thereof |
| US16/476,315 US11408577B2 (en) | 2017-01-12 | 2017-05-08 | Transparent photoconductor having light shielding function, and application thereof |
| DE112017006796.0T DE112017006796B4 (en) | 2017-01-12 | 2017-05-08 | TRANSPARENT PHOTOCONDUCTOR WITH LIGHT SHIELDING FUNCTION AND APPLICATION THEREOF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022825.7A CN106764810B (en) | 2017-01-12 | 2017-01-12 | Transparent optical conductor with shading effect and application thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN106764810A CN106764810A (en) | 2017-05-31 |
| CN106764810B true CN106764810B (en) | 2022-11-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018107213A1 (en) * | 2018-03-27 | 2019-10-02 | HELLA GmbH & Co. KGaA | Lighting device for vehicles |
| EP3643962A1 (en) * | 2018-10-25 | 2020-04-29 | ZKW Group GmbH | Light unit for a motor vehicle headlamp |
| CN109611781A (en) * | 2019-01-31 | 2019-04-12 | 成都恒坤光电科技有限公司 | A kind of car light lower beam illumination Optical devices and vehicle front lighting lamp assembly |
| CN109990247B (en) * | 2019-05-08 | 2024-03-12 | 成都恒坤光电科技有限公司 | Far-near light integrated automobile headlamp assembly |
| CN109973931B (en) * | 2019-05-08 | 2024-04-16 | 成都恒坤光电科技有限公司 | Car light low beam lighting spectral reflector, optical device and car head-light assembly |
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| CN106764810A (en) | 2017-05-31 |
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Address after: 201821 No. 767, Yecheng Road, Shanghai, Jiading District Applicant after: HUAYU VISION TECHNOLOGY (SHANGHAI) Co.,Ltd. Address before: 201821 No. 767, Yecheng Road, Shanghai, Jiading District Applicant before: SHANGHAI KOITO AUTOMOTIVE LAMP Co.,Ltd. |
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