WO2018129841A1 - 一种具有遮光作用的透明光导体及其应用 - Google Patents

一种具有遮光作用的透明光导体及其应用 Download PDF

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Publication number
WO2018129841A1
WO2018129841A1 PCT/CN2017/083411 CN2017083411W WO2018129841A1 WO 2018129841 A1 WO2018129841 A1 WO 2018129841A1 CN 2017083411 W CN2017083411 W CN 2017083411W WO 2018129841 A1 WO2018129841 A1 WO 2018129841A1
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Prior art keywords
light
transparent
incident
refracted
lens
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PCT/CN2017/083411
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English (en)
French (fr)
Inventor
张洁
Original Assignee
上海小糸车灯有限公司
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Publication date
Priority claimed from CN201710022825.7A external-priority patent/CN106764810B/zh
Priority claimed from CN201720035887.7U external-priority patent/CN206514204U/zh
Application filed by 上海小糸车灯有限公司 filed Critical 上海小糸车灯有限公司
Priority to DE112017006796.0T priority Critical patent/DE112017006796B4/de
Priority to US16/476,315 priority patent/US11408577B2/en
Publication of WO2018129841A1 publication Critical patent/WO2018129841A1/zh

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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
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • 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
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • 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
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions

Definitions

  • the present invention relates to a projection illumination system for a vehicle lamp, and in particular to a transparent light conductor having a light shielding function and a projection illumination system for the same, the transparent light conductor and a projection illumination system for the same
  • the light-dark cut-off line is formed by replacing the light-shielding plate of the prior art with a transparent light-conductor having a function of changing the light path, and the light which is originally blocked or reflected by the light-shielding plate into stray light is reused in three ways to participate in the illumination. Improve the overall light efficiency of the projection lighting system.
  • the projection illumination system commonly used in automobile lamps generally comprises a light source 1, a mirror 2, a visor 3 and a lens 4 as shown in FIG. 1, and the visor 3 is provided with a diaphragm structure 3a.
  • the mirror is an ellipsoidal shape, and the illuminating center of the light source is disposed at a near focus of the ellipsoidal mirror, and the light emitted by the light source is reflected by the ellipsoidal mirror and condensed near the far focus of the ellipsoidal mirror, the shading
  • the plate is placed at the far focus of the ellipsoidal mirror, and finally a parallel-like illumination pattern with a cut-off line is formed by the lens.
  • a light-dark cut line necessary for the light shape of the headlight low beam, the fog light, and the like is formed, and the shape of the aperture structure 3a and the corresponding different illumination are formed.
  • the brightness and darkness required for the function corresponds to a linear shape.
  • the low-beam light-dark line A is cut off, and the light-dark line of the fog lamp is a horizontal line, as shown in B of Fig. 11.
  • the conventional projection lighting system adopts the aperture structure 3a provided on the visor 3 to form a light-dark line, which has the following disadvantages:
  • a part of the light blocked by the aperture structure 3a cannot be reused, and only part of the light F1 is used for road illumination, resulting in loss of light energy.
  • the light blocked by the aperture structure 3a is partially absorbed by the light shielding plate 3, and a part of the light is reflected.
  • the partially reflected light F2 is uncontrolled, and is reflected by other parts inside the lamp and is irradiated to the road surface to form stray light. risk.
  • the light reflected by the aperture structure 3a is also irradiated to other functional areas, such as the turn signal or the position light function area, causing defects in light leakage between functions.
  • the present invention provides a projection illumination system for a vehicle lamp, and more particularly to a transparent light conductor having a light shielding effect, an optical path system formed by the transparent light conductor, and a projection illumination system for the same. And its car headlights.
  • the transparent light conductor can form a clear cut-off line while more fully utilizing incident light, that is, improving the utilization of incident light.
  • a transparent light conductor having a light shielding effect disposed between the light source 1 and the lens 4, wherein
  • the transparent light conductor 5 is provided with an aperture structure 5a for forming a cut-off line on the side of the outgoing light of the lens 4,
  • the transparent light conductor 5 is a rectangular block having a stepped upper and lower cross section.
  • the transparent photoconductor 5 is formed with an incident surface 5b, an exit surface 5c, and upper and lower reflecting surfaces 5d, 5e.
  • Part of the incident light is incident on the reflecting surface 2a of the mirror 2 and is directly reflected to the lens 4 to form the first portion G1 of the illumination pattern G.
  • the transparent light conductor 5 is a rectangular block having a stepped upper and lower cross section
  • the transparent light conductor of the present invention can form a clear cut-off line and more fully utilize incident light. That is, the incident light utilization rate is improved.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the transparent light conductor forms an optical path system as follows:
  • the other part of the incident light is incident on the incident surface 5b of the transparent light conductor 5 and refracted into the interior of the light conductor 5, and is refracted or reflected by the upper reflecting surface 5d to the exit surface 5c, refracted to the lens 4 through the exit surface 5c, and passed through the lens 4 Projected onto the road surface to form a second portion G2 of the illumination pattern (Fig. 7), which is not refracted to the lens after passing through the exit surface (5c)
  • the light of (4) becomes the first portion H1 of stray light.
  • the incident light is partially irradiated to the reflecting surface 2a of the mirror 2 and reflected to the upper reflecting surface 5d and then refracted to the lower reflecting surface 5e. After being refracted to the lens 4 via the lower reflecting surface 5e, the third portion G3 of the illumination shape is also formed. ( Figure 8).
  • the incident light is partially irradiated to the reflecting surface (2a) of the mirror (2) and reflected to the upper reflecting surface (5d) and then reflected to the lens (4) to form a fourth portion G4 of the illumination pattern (Fig. 9).
  • the incident light is partially irradiated to the reflecting surface (2a) of the mirror (2) and reflected to the upper reflecting surface (5d) and refracted into the transparent light conductor (5) to form a light path change, and the light path is changed after the light path is changed.
  • 5c is totally reflected, or is refracted by the lower reflecting surface 5e to form a second portion H2 of stray light to form a light-dark line.
  • a part of the stray light H2 is formed by the lower reflection surface 5e to be refracted first, and does not participate in road illumination.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the reflecting surface 5d and the lower reflecting surface 5e of the transparent photoconductor 5 are planes, respectively.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the reflective surface (5d) on the transparent light conductor (5) has a stepped height and a low portion, and the high and low portions transition in a slanting manner.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the transparent photoconductor 5 has a stepped height and a height difference of 1 to 3 mm.
  • the transparent photoconductor 5 has a stepped height and a height difference of 1.2 to 1.5 mm.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the incident surface 5a and the exit surface 5c of the transparent photoconductor 5 are convexly curved.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the incident surface portion of the transparent light conductor 5 whose stepped height portion is higher than the lower portion is divided into an inclined shape.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the light incident on the inside of the transparent light conductor 5 through the reflecting surface 5d is changed by the optical path to form a light-dark line, and a part of the light refracted to the exit surface 5c is totally reflected, and finally irradiated under the transparent light conductor.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the pupil structure 5a is disposed on the side of the light emitted from the transparent light conductor.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the light source 1 is a semiconductor light emitting chip.
  • a transparent light conductor having a light blocking effect according to the present invention characterized in that
  • the transparent photoconductor 5 is sintered by glass or by injection molding of transparent plastic.
  • the invention further provides a projection illumination system for a vehicle lamp, characterized in that
  • a transparent light conductor having a light blocking effect is used.
  • the present invention further provides a headlamp, characterized in that the projection illumination system for a vehicle lamp is used.
  • the invention achieves the beneficial effects of forming a light-dark cut-off line by replacing a light-shielding plate of the prior art with a transparent light-conductor having a function of changing an optical path, and obstructing or reflecting the light-shielding plate into stray light through three ways.
  • the light is reused and involved in lighting, improving the overall efficacy of the projected lighting system.
  • Path 1 A part of the light that is not irradiated to the reflecting surface is irradiated onto the incident surface of the transparent photoconductor 5, propagates in the transparent photoconductor, is refracted to the lens 4 through the exit surface 5c, and participates in road illumination.
  • Path 2 A part is reflected by the reflecting surface 2a of the mirror 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.
  • Path 3 a part is reflected by the reflecting surface 2a of the mirror 2 to the upper reflecting surface 5d of the transparent light conductor 5, and is refracted by the reflecting surface 5d to the inside of the transparent light conductor 5, and is refracted to the lens 4 through the lower reflecting surface 5e, and participates Road lighting.
  • Another benefit of increased light efficiency through the above approach is the reduction of uncontrolled stray light. That is, according to the present invention, the transparent light conductor can form a clear cut-off line while improving the utilization of incident light.
  • FIG. 1 is a schematic diagram of a projection illumination system commonly used in automobile lamps.
  • FIGS. 2 and 3 are schematic diagrams of the light and dark cut-off lines necessary for forming a light pattern of a headlight low beam, a fog lamp, etc. by the occlusion of the aperture structure 3a.
  • FIG. 4 is a schematic view showing the assembly of a projection type illumination system for a vehicle lamp according to the present invention.
  • FIG. 5 is a schematic diagram of light refraction and projection of the photoconductor and the illumination system of the present invention.
  • FIG. 6 is a schematic view showing light refraction and projection of a photoconductor and an illumination system of the present invention.
  • Fig. 7 is a schematic view showing light refraction and projection of the photoconductor and the illumination system of the present invention.
  • Fig. 8 is a schematic view showing light refraction and projection of the photoconductor and the illumination system of the present invention.
  • Fig. 9 is a schematic view showing light refraction and projection of the photoconductor and the illumination system of the present invention.
  • Figure 10 is a schematic view of the close-to-light line A of the low beam shape.
  • Fig. 11 is a schematic view showing the light-dark line of the fog lamp being a horizontal line.
  • 1 is a light source
  • 2 is a mirror
  • 2a is a reflecting surface 2a of the mirror
  • 3 is a light blocking plate
  • 3a is a diaphragm structure
  • 4 is a lens
  • 5 is a transparent light conductor
  • 5a is a diaphragm structure
  • 5b For the incident surface
  • 5c is the exit surface
  • 5d and 5e are the upper and lower reflective surfaces of the transparent photoconductor, respectively.
  • A is the light-dark line of the low-beam light
  • B is the light-dark line of the fog light.
  • F1 is the illumination light of the existing projection illumination system
  • F2 is the stray light.
  • G is the illumination light of the illumination system of the present invention, and is divided into G1, G2, G3, and G4 according to the source thereof, and G1 is the first portion of the illumination light shape G formed by the incident light ray passing through the reflection surface 2a and directly reflected to the lens 4.
  • G2 is another part of the incident light refracted to the inside of the photoconductor 5 via the incident surface 5b, and is refracted or reflected by the upper reflecting surface 5d to the exit surface 5c, and then forms a second part of the illumination light shape through the lens 4, and G3 is a part of the incident light.
  • the reflecting surface 2a and the upper reflecting surface 5d are refracted to the lower reflecting surface 5e, and then refracted to the third portion of the illumination light shape formed by the lens 4, and G4 is incident light passing through the reflecting surface (2a) and the upper reflecting surface (5d). Reflecting to the lens (4) forms a fourth portion of the illumination pattern.
  • H is the stray light of the illumination system of the present invention, and is divided into a first portion H1 and a second portion H2 according to its source.
  • the illumination system of the present invention includes a light source 1, a mirror 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 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 and 5e.
  • the light source 1 is preferably a semiconductor light emitting chip, and a part of the light emitted from the light source 1 is irradiated onto the reflecting surface 2a of the mirror 2 and reflected, a part thereof is reflected to the lens 4, and a part is reflected to the upper reflecting surface 5d as shown in FIG. A part is irradiated to the incident surface 5b of the transparent photoconductor 5 and refracted to the inside of the photoconductor 5.
  • a part of the light refracted inside the photoconductor 5 is refracted through the incident surface 5b or reflected by the upper reflecting surface 5d to the exit surface 5c, and is refracted to the lens 4 through the exit surface 5c, and then projected through the lens 4 to the road surface to form a part of the illumination light shape.
  • G2 Figure 7
  • the incident light beam is further irradiated to the reflecting surface 2a of the mirror 2 and is reflected to the upper reflecting surface 5d and then refracted to the lower reflecting surface 5e. After being refracted to the lens 4 via the lower reflecting surface 5e, a part of the illumination light is also formed.
  • Figure 8 is projected through the lens 4 onto the road surface to form a portion of the illumination pattern.
  • the light passing through the reflecting surface 5d to the inside of the transparent light conductor 5 is an important principle for forming a light-dark line due to the change of the optical path, and a part of the light refracted to the exit surface 5c is totally reflected because the incident angle is larger than the total reflection angle, as shown in FIG. As shown, the light is finally irradiated under the transparent light guide to form stray light H2, which cannot reach the lens 4, and thus does not participate in road illumination, and is uncontrollable light.
  • a part of the light refracted to the lower reflecting surface 5e is refracted to the lens 4 through the lower reflecting surface 5e to form a part of the illuminating light shape, but after being twice refracted by the upper and lower reflecting surfaces 5d, 5e, the light and dark are also formed due to the change of the optical path.
  • the important principle of the line is the important principle of the line.
  • the transparent light conductor and the projection illumination system for the same are formed by a transparent light conductor having a light-shielding effect instead of the prior art light-shielding plate to form a light-dark line, and at the same time, through three ways, the original Light that is blocked or reflected by the visor into stray light is reused and involved in illumination, improving the overall efficacy of the projected illumination system.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

一种具有遮光作用的透明光导体（5）及车灯照明系统，透明光导体（5）设有光阑结构（5a），包括入射面（5b）、出射面（5c）以及上、下反射面（5d、5e），入射光线一部分照射到反射镜（2）的反射面（2a）并被直接反射到透镜（4），形成照明光形（G）的第一部分（G1），入射光线另一部分照射到透明光导体（5）的入射面（5b）并折射到光导体（5）内部，经过上反射面（5d）再经过出射面（5c）折射到透镜（4），形成照明光形（G）的第二部分（G2），入射光线另一部分经过入射面（5b）折射到上反射面（5d），反射出射面（5c）后，也通过透镜（4）后投射到路面，形成照明光形（G）的第二部分（G2）。入射光线又一部分照射到反射镜（2）的反射面（2a）并被反射到上反射面（5d）后折射到下反射面（5e），经下反射面（5e）再折射到透镜（4）后也形成照明光形（G）的第三部分（G3）。入射光线又一部分照射到反射镜（2）的反射面（2a）并被反射到上反射面（5d）后反射到透镜（4）后也形成照明光形（G）的第四部分（G4）。通过具有改变光路作用的透明光导体代替现有技术的遮光板来形成明暗截至线，提高投射式照明系统的总体光效。

Description

一种具有遮光作用的透明光导体及其应用 技术领域
本发明涉及一种车灯用投射式照明系统，具体的，涉及一种具有遮光作用的透明光导体及其车灯用投射式照明系统，所述透明光导体及其车灯用投射式照明系统通过一种具有改变光路作用的透明光导体代替现有技术的遮光板来形成明暗截至线,同时通过3种途径，将本来被遮光板遮挡或反射成为杂散光的光线重新利用起来，参与照明，提高了投射式照明系统的总体光效。
背景技术
汽车车灯中常用的投射式照明系统，一般都包括如图1所示光源1、反射镜2、遮光板3以及透镜4组成，所述遮光板3设有光阑结构3a。所述反射镜为椭球形，所述光源的发光中心设置在椭球形反射镜的近焦点处，光源发出的光线经过椭球形反射镜反射后汇聚于椭球形反射镜的远焦点附近，所述遮光板设置于椭球形反射镜的远焦点处，最后通过透镜形成带有明暗截至线的类平行光照明光形。
如图2、3所示，通过所述光阑结构3a的遮挡，来形成前照灯近光、雾灯等光形所必需的明暗截至线，所述光阑结构3a的形状与相应不同照明功能所需的明暗截至线性状相对应，如图10示意的是近光光形的明暗截至线A，雾灯的明暗截至线为水平线，如图11的B所示。
传统投射式照明系统所采用的通过遮光板3上设有的光阑结构3a来形成明暗截至线的做法存在如下几个缺点：
1、一部分被光阑结构3a遮挡的光线无法再利用，仅部分光线F1被用来进行道路照明，造成光能的损失。
2、被光阑结构3a遮挡的光线，一部分被遮光板3吸收，一部分被反射，这部分被反射的光线F2由于不受控制，存在被灯具内部其他零件反射后照射到路面，形成杂散光的风险。
3、被光阑结构3a反射的光线还有照射到其他功能区域，如转向灯或位置灯功能区域，造成功能间漏光的缺陷。
4、由于光源照射的角度一般不小于180度，一部分光线由于照射不到反射镜而造成光能损失。
发明内容
为解决上述问题，本发明提供一种车灯用投射式照明系统，具体的，涉及一种具有遮光作用的透明光导体、所述透明光导体形成的光路系统、其车灯用投射式照明系统及其汽车前照灯。根据本发明，透明光导体可形成清晰的明暗截止线的同时，更加充分地利用入射光线，即，提高入射光线利用率。
本发明具有遮光作用的透明光导体技术方案如下：
一种具有遮光作用的透明光导体，设置于光源1和透镜4之间，其特征在于，
所述透明光导体5在其靠近透镜4的出射光侧设有用来形成明暗截至线的光阑结构5a，
所述透明光导体5为截面呈阶梯型上下二部的矩形块状，
所述透明光导体5形成有入射面5b、出射面5c以及上、下反射面5d、5e，
入射光线一部分照射到反射镜2的反射面2a并被直接反射到透镜4，形成照明光形G的第一部分G1。
根据本发明，由于所述透明光导体5为截面呈阶梯型上下二部的矩形块状，因此，使得本发明的透明光导体可形成清晰的明暗截止线的同时，更加充分地利用入射光线，即，提高入射光线利用率。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述透明光导体形成如下的光路系统：
入射光线另一部分照射到透明光导体5的入射面5b并折射到光导体5内部，再折射到或经过上反射面5d反射到出射面5c，经过出射面5c折射到透镜4，通过透镜4后投射到路面，形成照明光形的第二部分G2(图7)，经过出射面(5c)后未折射到透镜 (4)的光线成为杂散光的第一部分H1。
入射光线又一部分照射到反射镜2的反射面2a并被反射到上反射面5d后折射到下反射面5e，经下反射面5e再折射到透镜4后也形成照明光形的第三部分G3(图8)。
入射光线又一部分照射到反射镜(2)的反射面(2a)并被反射到上反射面(5d)后反射到透镜(4)后也形成照明光形的第四部分G4(图9)。
入射光线又一部分照射到反射镜(2)的反射面(2a)并被反射到上反射面(5d)后折射到透明光导体(5)内部，形成光路改变，光路改变后的光线经出射面5c全反射，或经下反射面5e先下折射后形成杂散光的第二部分H2，形成明暗截至线。
经下反射面5e先下折射后形成杂散光的一部分H2，不参与道路照明。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述透明光导体5上反射面5d及下反射面5e分别为平面。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述透明光导体(5)上反射面(5d)呈阶梯型高、低二部，高低二部以倾斜状过渡。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述透明光导体5呈阶梯型高低二部的高度差为1至3mm。
优选的是，所述透明光导体5呈阶梯型高低二部的高度差为1.2至1.5mm。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述透明光导体5入射面5a及出射面5c为外凸弧形。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述透明光导体5的阶梯型高部高出低部的入射面部分为倾斜状。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
通过反射面5d入射透明光导体5内部的光线由于光路改变，形成明暗截至线，其中一部分折射到出射面5c的光线，产生全反射，最终照射到透明光导体下方。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述光阑结构5a设置于透明光导体出射光侧。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
所述光源1为半导体发光芯片。
根据本发明所述一种具有遮光作用的透明光导体，其特征在于，
透明光导体5为玻璃材质烧制碾压成型或采用透明塑料注塑成型。
本发明又提供一种车灯用投射式照明系统，其特征在于，
使用所述一种具有遮光作用的透明光导体。
本发明又提供一种前照灯，其特征在于，使用所述的车灯用投射式照明系统。
本发明达到的有益效果：通过一种车具有改变光路作用的透明光导体代替现有技术的遮光板来形成明暗截至线,同时通过3种途径，将本来被遮光板遮挡或反射成为杂散光的光线重新利用起来，参与照明，提高了投射式照明系统的总体光效。途径1：一部分照射不到反射面的光线照射到透明光导体5的入射面，在透明光导体内传播后通过出射面5c折射到透镜4，并参与道路照明。途径2：一部分由反射镜2的反射面2a反射到透明光导体5的上反射面5d，并由反射面5d反射到透镜4，并参与道路照明。途径3：一部分由反射镜2的反射面2a反射到透明光导体5的上反射面5d，并由反射面5d折射到透明光导体5内部，并且经过下反射面5e折射到透镜4，并参与道路照明。通过上述途径，增加了光效的另一有益效果在于减少了不受控制的杂散光。即，根据本发明，透明光导体可形成清晰的明暗截止线的同时，提高入射光线利用率。
附图说明
图1为汽车车灯中常用的投射式照明系统示意图。
图2、3分别为通过所述光阑结构3a的遮挡形成前照灯近光、雾灯等光形所必需的明暗截至线示意图。
图4为本发明的一种车灯用投射式照明系统的组装示意图。
图5为本发明的光导体及照明系统的光线折射、投射示意图。
图6为本发明的光导体及照明系统的光线折射、投射示意图。
图7为本发明的光导体及照明系统的光线折射、投射示意图。
图8为本发明的光导体及照明系统的光线折射、投射示意图。
图9为本发明的光导体及照明系统的光线折射、投射示意图。
图10为近光光形的明暗截至线A示意图。
图11为雾灯的明暗截至线为水平线的示意图。
图中，1为光源，2为反射镜，2a为反射镜2的反射面2a，3为遮光板，3a为光阑结构，4为透镜，5为透明光导体，5a为光阑结构，5b为入射面，5c为出射面，5d，5e分别为透明光导体的上、下反射面。A为近光光形的明暗截至线，B为雾灯的明暗截至线。F1为现有投射式照明系统的照明光线，F2为杂散光。G为本发明的照明系统的照明光线，根据其来源分为G1、G2、G3、G4，G1为入射光线一部分经反射面2a并被直接反射到透镜4形成的照明光形G的第一部分，G2为入射光线另一部分经入射面5b折射到光导体5内部，再折射或经上反射面5d反射到出射面5c后通过透镜4形成照明光形的第二部分，G3为入射光线又一部分经反射面2a、上反射面5d后折射到下反射面5e，再折射到透镜4后形成的照明光形的第三部分，G4为入射光线经反射面(2a)、上反射面(5d)，反射到透镜(4)后形成照明光形的第四部分。H为本发明的照明系统的杂散光，根据其来源分为第一部分H1、第二部分H2。
具体实施方式
实施例
如图4，5所示，本发明的照明系统包括光源1、反射镜2、透明光导体5以及透镜4。所述透明光导体5设有用来形成明暗截至线的光阑结构5a。所述透明光导体5还设有入射面5b、出射面5c以及上、下反射面5d、5e。所述光源1优选半导体发光芯片，光源1发出的光线一部分照射到反射镜2的反射面2a并被反射，其一部分反射到透镜4，一部分反射到上反射面5d，如图5所示。一部分照射到透明光导体5的入射面5b并折射到光导体5内部。
折射到光导体5内部的一部分光线经过入射面5b折射或经过上反射面5d反射到出射面5c，并经过出射面5c折射到透镜4，通过透镜4后投射到路面，形成照明光形的一部分G2(图7)。
入射光线又一部分照射到反射镜2的反射面2a并被反射到上反射面5d后折射到下反射面5e，经下反射面5e再折射到透镜4后也形成照明光形的又一部分G3(图8)，如图8所示，通过透镜4后投射到路面，形成照明光形的一部分。
入射光线又一部分照射到反射镜(2)的反射面(2a)并被反射到上反射面(5d) 后反射到透镜(4)后也形成照明光形的又一部分G4(图9)。
通过反射面5d到透明光导体5内部的光线由于光路改变，是形成明暗截至线的重要原理，其中一部分折射到出射面5c的光线，由于入射角大于全反射角，产生全反射，如图8所示，最终照射到透明光导体下方，形成杂散光H2，无法到达透镜4，从而不参与道路照明，为不可控光线。
一部分折射到下反射面5e的光线经过下反射面5e折射到透镜4后也形成照明光形的一部分，但经过上、下反射面5d、5e两次折射后，由于光路改变，同样是形成明暗截至线的重要原理。
根据本发明，所述透明光导体及其车灯用投射式照明系统通过一种车具有遮光作用的透明光导体代替现有技术的遮光板来形成明暗截至线,同时通过3种途径，将本来被遮光板遮挡或反射成为杂散光的光线重新利用起来，参与照明，提高了投射式照明系统的总体光效。

Claims (10)

  1. 一种具有遮光作用的透明光导体，设置于光源(1)和透镜(4)之间，其特征在于，
    所述透明光导体(5)在其靠近透镜(4)的出射光侧设有用来形成明暗截至线的光阑结构(5a)，
    所述透明光导体(5)为截面呈阶梯型高、低二部的矩形块状，
    所述透明光导体(5)形成有入射面(5b)、出射面(5c)以及上、下反射面(5d)、(5e)，
    入射光线一部分照射到反射镜(2)的反射面(2a)并被直接反射到透镜(4)，形成照明光形的第一部分(G1)。
  2. 如权利要求1所述一种具有遮光作用的透明光导体，其特征在于，
    所述透明光导体形成如下的光路：
    入射光线另一部分照射到透明光导体(5)的入射面(5b)并折射到光导体(5)内部，再折射或经过上反射面5d反射到出射面(5c)，经过出射面(5c)折射到透镜(4)，通过透镜(4)后投射到路面，形成照明光形的第二部分(G2)，经过出射面(5c)后未折射到透镜(4)的光线成为杂散光的第一部分(H1)，
    入射光线又一部分照射到反射镜(2)的反射面(2a)并被反射到上反射面(5d)后折射到下反射面(5e)，经下反射面(5e)再折射到透镜(4)后也形成照明光形的第三部分(G3)，
    入射光线又一部分照射到反射镜(2)的反射面(2a)并被反射到上反射面(5d)后反射到透镜(4)后也形成照明光形的第四部分(G4)，
    入射光线又一部分照射到反射镜(2)的反射面(2a)并被反射到上反射面(5d)后折射到透明光导体(5)内部，形成光路改变，光路改变后的光线经出射面5c全反射，或经下反射面(5e)先下折射后形成杂散光的第二部分(H2)，形成明暗截至线。
  3. 如权利要求1所述一种具有遮光作用的透明光导体，其特征在于，
    所述透明光导体(5)上反射面(5d)及下反射面(5e)分别为平面。
  4. 如权利要求1或3所述一种具有遮光作用的透明光导体，其特征在于，
    所述透明光导体(5)上反射面(5d)呈阶梯型高、低二部，高低二部以倾斜状过渡。
  5. 如权利要求4所述一种具有遮光作用的透明光导体，其特征在于，
    所述透明光导体(5)呈阶梯型高低二部的高度差为1至3mm。
  6. 如权利要求1所述一种具有遮光作用的透明光导体，其特征在于，
    所述透明光导体(5)入射面5a及出射面(5c)为外凸弧形。
  7. 如权利要求1所述一种具有遮光作用的透明光导体，其特征在于，
    所述透明光导体(5)的阶梯型高部高出低部的入射面部分为倾斜状。
  8. 如权利要求1所述一种具有遮光作用的透明光导体，其特征在于，
    通过反射面(5d)入射透明光导体(5)内部的光线由于光路改变，形成明暗截至线，其中一部分折射到出射面(5c)的光线，产生全反射，最终照射到透明光导体下方。
  9. 一种车灯用投射式照明系统，包括光源(1)、设置于光源(1)旁侧的反射镜(2)以及设置于出射光侧的透镜(4)，其特征在于，使用权利要求1-8任一项所述一种具有遮光作用的透明光导体。
  10. 一种前照灯，其特征在于，使用权利要求8所述的车灯用投射式照明系统。
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CN105465709A (zh) * 2014-09-10 2016-04-06 鸿富锦精密工业（深圳）有限公司 Led车灯
CN104501060A (zh) * 2014-12-24 2015-04-08 芜湖市汽车产业技术研究院有限公司 一种由汽车前雾灯衍生的信号灯

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