(19)
(11)EP 3 447 370 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
27.07.2022 Bulletin 2022/30

(21)Application number: 18186102.2

(22)Date of filing:  27.07.2018
(51)International Patent Classification (IPC): 
F21S 41/16(2018.01)
F21S 41/153(2018.01)
F21S 41/663(2018.01)
F21S 41/14(2018.01)
F21S 41/148(2018.01)
F21S 41/675(2018.01)
(52)Cooperative Patent Classification (CPC):
F21S 41/18; F21S 41/663; F21S 41/16; F21S 41/153; F21S 41/148; F21S 41/675

(54)

HEADLAMP WITH ROAD-WRITING SYSTEM

SCHEINWERFER MIT STRASSENSCHREIBSYSTEM

PHARE AVEC SYSTÈME D'ÉCRITURE SUR ROUTE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 23.08.2017 US 201715684513

(43)Date of publication of application:
27.02.2019 Bulletin 2019/09

(73)Proprietor: Valeo North America, Inc.
Troy, MI 48083 (US)

(72)Inventor:
  • POTTER, Brant
    Seymour, MI 47274 (US)

(74)Representative: Valeo Visibility 
Service Propriété Industrielle c/o Valeo Vision 34, rue Saint André
93012 Bobigny
93012 Bobigny (FR)


(56)References cited: : 
EP-A1- 3 305 592
DE-A1-102005 041 234
FR-A1- 3 043 168
US-A1- 2016 146 419
EP-A2- 2 772 682
FR-A1- 3 040 935
JP-A- 2014 189 198
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    BACKGROUND



    [0001] A Digital Micro-mirror Device (DMD) allows an image to be projected onto a road surface, which is also known as road writing. Road writing requires a combination of an image projection pattern and a complementary pattern. The complementary low beam lamp pattern needs to be adapted to create a dark region in the foreground to allow the addition of the image projection pattern. The dark region needs to provide a sufficient contrast for the projected image to create a clear image on the road surface.

    [0002] One road-writing system includes a low beam lamp pattern with a flat beam and a specialized kink beam near cutoff, plus a road-writing projection. The flat portion of the beam needs to be asymmetrical to create a proper tunnel in the near foreground for the projected image.

    [0003] There have been attempts made to address the objectives as stated above. Such as in, French patent FR 3040935 A1 pertaining to lighting system for a motor vehicle. The patent discloses a lighting system comprising a projection device for a passing beam in a projection zone such that a zone of less illumination is created inside the projection zone for allowing the projection.

    [0004] Fig. 1A illustrates a low beam luminous distribution for a left headlamp with a DMD road-marking distribution portion 10, a kink flat distribution portion 20, a flat beam distribution portion 30, a DMD Adaptive Driving Beam (ADB) distribution portion 40, and a complementary high beam distribution portion 50. Fig. 1B is a symmetrical low beam luminous distribution for a right headlamp with the DMD road-marking distribution portion 10, the kink flat distribution portion 20, the flat beam distribution portion 30, the DMD Adaptive Driving Beam (ADB) distribution portion 40, and the complementary high beam distribution portion 50. As illustrated in Figs. 1A and 1B, the beam distribution patterns spread right and left beyond the vertical axis. Therefore, in order to create an opening in front of the vehicle for a DMD image projection, the left headlamp distribution needs to spread to the left with no spread to the right, and the right headlamp distribution needs to spread to the right with no spread to the left.

    [0005] Unfortunately, certain vehicle headlamp requirements fail this particular luminous distribution pattern because there is no light at approximately the 15º or 20º distribution point. In addition, this distribution pattern can have poor homogeneity for a low beam luminous distribution. Also, the DMD road marking portion 10 is activated at all times to fill the newly-created opening in the luminous distribution pattern.

    [0006] The "background" description provided herein is for the purpose of generally presenting the context of the disclosure.

    SUMMARY



    [0007] Embodiments described herein include the following aspects.
    1. (1) A low beam headlamp assembly according to claim 1.
    2. (2) The low beam headlamp assembly of (1), wherein the circuitry is further configured to keep the second light source activated when the near-field road-writing segment and the far-field road-writing segment are activated.
    3. (3) The low beam headlamp assembly of (1), wherein a first power level of a first group of flat luminous segments differs from a second power level of a second group of flat luminous segments.
    4. (4) The low beam headlamp assembly of (1), wherein the plurality of flat luminous segments includes a range of seven to thirty two individual flat luminous segments.
    5. (5) The low beam headlamp assembly of (1), wherein the plurality of flat luminous segments includes a first row and a second row of individual flat luminous segments.
    6. (6) The low beam headlamp assembly of (5), wherein a first power level of the first row of individual flat luminous segments differs from a second power level of the second row of individual flat luminous segments.
    7. (7) The low beam headlamp assembly of (1), wherein the first light source includes a laser diode light source.


    [0008] A headlamp assembly according to claim 8.

    [0009] The foregoing paragraphs have been provided by way of general introduction, and are not intended to limit the scope of the following claims. The described embodiments, together with further advantages, will be best understood by reference to the following detailed description taken in conjunction with the accompanying drawings.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0010] A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

    Fig. 1A illustrates a low beam luminous distribution for a left headlamp with a road-marking capability according to one embodiment;

    Fig. 1B illustrates a low beam luminous distribution for a right headlamp with a road-marking capability according to one embodiment;

    Fig. 2A illustrates a front-end of an exemplary motor vehicle according to one embodiment

    Fig. 2B is a schematic diagram of an exemplary roadway, a motor vehicle, and a light distribution pattern according to one embodiment;

    Fig. 3A illustrates an exemplary hybrid headlamp according to one embodiment;

    Fig. 3B illustrates a laser diode module and an LED module according to one embodiment;

    Fig. 3C illustrates a laser diode module and two LED modules according to one embodiment;

    Fig. 4A illustrates an exemplary luminous intensity distribution for a laser diode source according to one embodiment;

    Fig. 4B illustrates an exemplary luminous intensity distribution for a laser diode source according to one embodiment;

    Fig. 4C illustrates an exemplary combined luminous intensity distribution for two laser diode sources according to one embodiment;

    Fig. 5 illustrates a layout of an exemplary hybrid low beam array assembly according to one embodiment;

    Fig. 6 illustrates a beam pattern simulation of each flat reflector for a LED flat module according to one embodiment;

    Fig. 7 illustrates an exemplary luminous intensity distribution for a flat beam pattern of a LED component according to one embodiment;

    Fig. 8 illustrates an exemplary combined luminous intensity distribution for a hybrid LED module and laser diode module according to one embodiment;

    Fig. 9 illustrates a luminous intensity distribution pattern according to one embodiment;

    Fig. 10 illustrates a luminous intensity distribution pattern with the near-field DMD segment and the far-field DMD segment activated according to one embodiment;

    Fig. 11 is a block diagram illustrating activation of various segments of a headlamp low beam illumination according to one embodiment;

    Fig. 12 is a block diagram illustrating four flat segments located to the left that are activated, a middle flat segment is not activated, and three flat segments located to the right are activated at a reduced power level according to one embodiment;

    Fig. 13 is a block diagram illustrating a larger number of flat segments according to one embodiment;

    Fig. 14 is a block diagram illustrating two rows of flat segments according to one embodiment;

    Fig. 15 is a block diagram illustrating a headlamp low beam illumination with road-writing features according to one embodiment;

    Fig. 16 illustrates a functional block diagram of an exemplary low beam headlamp assembly according to one embodiment; and

    Fig. 17 illustrates a functional block diagram of an exemplary laser diode module according to one embodiment.


    DETAILED DESCRIPTION



    [0011] The following descriptions are meant to further clarify the present disclosure by giving specific examples and embodiments of the disclosure. These embodiments are meant to be illustrative rather than exhaustive. The invention is defined by the claims.

    [0012] In the interest of clarity, not all of the features of the implementations described herein are shown and described in detail. It will be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions will be made in order to achieve the developer's specific goals, such as compliance with application- and business-related constraints, and that these specific goals will vary from one implementation to another and from one developer to another.

    [0013] Embodiments described herein provide systems for a low beam road-writing headlamp distribution. Inactivation of central low beam flat segments and a kink segment provides a mechanism to project a clear contrasting image onto a road surface in front of a vehicle.

    [0014] Fig. 2A illustrates a front-end of an exemplary motor vehicle 100. Motor vehicle 100 includes two headlamp assemblies 105a and 105b. Headlamp assemblies 105a and 105b include low beam headlamps 110a and 110b (also referred to as a lower or dipped beam) and high beam headlamps 115a and 115b (also referred to as a main or driving beam). Typically, the low beam headlamps 110a and 110b are used whenever another vehicle is on the road directly ahead of motor vehicle 100 and/or whenever another vehicle is approaching motor vehicle 100 from an opposite direction.

    [0015] Fig. 2B is a schematic diagram of an exemplary roadway 200, motor vehicle 205, and a light distribution pattern 210 for low beam headlamps of motor vehicle 205. Light distribution pattern 210 for the low beam headlamps of motor vehicle 205 can be optically designed to minimize the amount of light that crosses the centerline 220 of roadway 200 to reduce dazzle (a blinding effect from the headlights) to a driver of an oncoming motor vehicle 215. Additionally, a range of the low beam headlamps of motor vehicle 205 can be limited to reduce dazzle in the rear-view mirror for a driver of motor vehicle 225 directly ahead of motor vehicle 205 driving in the same direction.

    [0016] Fig. 3A illustrates an exemplary hybrid headlamp 300 according to embodiments described herein. Fig. 3A illustrates a kink module 310 and a LED flat module 320. In the kink module 310, kink1 represents a first kink light source and kink2 represents a second kink light source. In one embodiment, kink1 and/or kink2 represent a first and/or second laser diode light source, respectively. In a second embodiment, kink1 and kink2 represent a first and second standard LED light source, respectively.

    [0017] The present inventors recognized that separation of the kink module 310 from the LED module 320 facilitates separate aiming and alignment of the two modules with associated tolerances. Fig 3A, as well as Figs. 3B and 3C, illustrates the independent vertical adjustment of the kink module 310 from the LED flat module 320. When the kink module 310 includes a first and second laser diode light source, the kink module 310 of laser diode light sources typically needs laser safety sensors and has additional thermal requirements. Therefore, the separate kink module 310 and LED flat module 320 accommodate a laser diode environment.

    [0018] Fig. 3B illustrates the kink module 310 and an LED flat module 320 having multiple LED components. Fig. 3B illustrates six LED components, LED1 through LED6. However, less than six LED components or more than six LED components are contemplated by embodiments described herein.

    [0019] Fig. 3C illustrates the kink module 310 and a first LED flat module 321 having three LED components LED1 through LED3, and a second LED flat module 322 having three LED components LED4 through LED6. However, more than two LED flat modules are contemplated by embodiments described herein. In addition, less than three or more than three LED components within each LED flat module are contemplated by embodiments described herein.

    [0020] Fig. 4A illustrates an exemplary luminous intensity distribution for a first kink source K1. Fig. 4A illustrates different levels of intensity, wherein illustrated features include a total flux in lumens (lm), a maximum and minimum intensity value in candela (CD), a maximum and minimum center point given in x-y degree coordinates (DEGA), and a horizontal-vertical (H-V) intensity value given in candelas. K1 provides a maximum intensity hot spot to provide adequate light at a distance down the road. The hot spot has a small aperture height.

    [0021] Fig. 4B illustrates an exemplary luminous intensity distribution for a second kink source K2. The luminous intensity distribution of K2 has more spread than K1 to blend with a LED flat module.

    [0022] Any number of kink sources having different intensity distributions may be used to provide a desired blending transition from the hot spot of K1 to the intensity distribution of a particular LED flat module. In one embodiment, both K1 and K2 can be laser diode sources. In a second embodiment, one of the kink sources can be replaced with a high luminance LED component due to the distribution pattern and small hot spot area, while the other kink source is a laser diode source. This would provide a lower cost and better adaptation of color to the LED flat module than would a laser diode module, but intensity transitions may become more noticeable. Combinations of laser diode and LED flat sources may be used to achieve a desired effect. Laser sources have the benefit of source luminance, which provides a higher intensity hot spot or a hot spot located at a higher location in the pattern. LED sources tend to be lower in cost and have fewer safety issues. However, high luminance LEDs are approaching the luminance of conventional LED sources.

    [0023] Fig. 4C illustrates an exemplary combined luminous intensity distribution for the first kink K1 and the second kink K2. The combined kink sources provide improved tolerances and are sufficient to meet most headlamp standards and test points. In an embodiment, the optical configuration of K1 and K2 are the same.

    [0024] Fig. 5 illustrates an expanded view of an exemplary hybrid low beam array assembly. Fig. 5 illustrates seven solid state light source modules, numbered one through seven. However, more than seven or fewer than seven solid state light source modules are contemplated by embodiments described herein. Module eight represents the laser solid state light source module. Fig. 5 also illustrates a single continuous lens and folder. However, separate reflector segments are also contemplated by embodiments described herein.

    [0025] In an embodiment given for illustrative purposes only, the dimensions for each segment (individual module plus an associated portion of the reflector 510 and 520, folder 530, and imaging lens 540) is approximately 15 mm in height, 18 mm in width, and 25 mm in depth. When each solid state light source module produces approximately 300 lumens, the array of lumens produces 7 x 300 = approximately 2100 lumens. The elliptical reflector 610 and 620 can be made of thermoplastic or metallic material and can have a focal length range of 1.5 - 4 mm and a reflectivity (R) range of 0.90 - 0.95. The folder 530 material has a reflectivity of approximately 0.8 - 0.95. The imaging lens 540 can be made of PMMA, PC, silicone, glass, or thermoplastic material. However, other materials and dimensions of segments are contemplated by embodiments described herein.

    [0026] Fig. 6 illustrates a beam pattern simulation of each flat reflector for a LED flat module, such as the eight reflectors illustrated in the laser low beam flat module of Fig. 5. The numbering next to flat reflectors 1-8 designates a position of each flat reflector within the module, wherein N-0 is the center flat reflector position within the module.

    [0027] Fig. 7 illustrates an exemplary luminous intensity distribution of the combined composite flat beam pattern of flat reflectors 1-8. All of the flat reflectors 1-8 are activated in Fig. 7.

    [0028] Fig. 8 illustrates an exemplary combined luminous intensity distribution for a hybrid flat module and a kink module. In one embodiment, a laser diode module includes a first laser diode source LD1 and/or a second laser diode source LD2. The combination of a LED flat module with a laser diode module produces a high performance uniform light beam. The hybrid low beam headlamp provides a thin aspect headlamp assembly for optimal down-the-road lamp performance at a cost lower than an entire laser diode assembly.

    [0029] Embodiments described herein include systems in which a hybrid module is modified to create a dark region for display of a road-writing image that meets vehicle headlamp standards. The hybrid module includes a flat module having a plurality of flat reflectors, such as the reflectors illustrated in Fig. 6. In addition, the hybrid module includes a near-field DMD segment and a far-field DMD segment.

    [0030] Table 1 illustrates a system in which certain low beam segments are activated, either partially or completely, and other low beam segments are not activated for the left headlamp (LH) and the right headlamp (RH).



    [0031] In Table 1, the first and second segments for the LH and the RH are operating at 5% power. The third, fourth, and fifth segments are inactivated for the LH and the RH. The sixth, seventh, and eighth segments are operating at 50% power for the LH and the RH. The near-field DMD segment and the far-field DMD segment are activated for the LH and the RH. Kink1 of the kink module is inactivated in Table 1.

    [0032] In Table 1, segments 1 and 2 are primarily for inboard lighting, and hence are at a low 5% maximum power. Segments 6-8 are primarily for outboard lighting, and hence are at 50% maximum power. The near-field DMD segment projects light downward towards the ground, while the far-field DMD segment projects light along the horizon.

    [0033] The system described above with reference to Table 1 provides a mechanism of creating an opening in the luminous distribution pattern for projection of a road-writing image, via segments 3, 4, and 5 being deactivated, while leaving the remaining segments at least partially activated. In addition, a mechanism is provided in which to activate or deactivate the road-writing kink, i.e. the near-field DMD segment and the far-field DMD segment. Therefore, an opening in the luminous distribution pattern can be created for projection of a road-writing image without sacrificing or altering the remaining luminous distribution pattern. Other segment variations of activation are contemplated by embodiments described herein, which depend upon specific vehicle and optical systems.

    [0034] Fig. 9 illustrates a luminous intensity distribution pattern according to the specifications of Table 1, except there is no DMD segment activation in Fig. 9. The hybrid module includes kink1 and kink2 and the LED flat module includes eight flat reflectors. In one embodiment, only kink2 is activated at a blend of approximately 75% power.

    [0035] Fig. 9 illustrates activation of the flat module and the kink modules only (with no DMD segments activated). There is an intense amount of light on the left region of the distribution pattern because the small flat segments (segments 6-8) are activated and the middle segments (segments 3-5) are not activated. At approximately 20º to the right, there is a small amount of light intensity illustrated from the 5% powered segments 1-2.

    [0036] Fig. 10 illustrates a luminous intensity distribution pattern according to the specifications of Table 1 with the near-field DMD segment and the far-field DMD segment activated. In one embodiment, only kink2 is activated; the far-field DMD segment could be used to create a kink step, if necessary.

    [0037] In Fig. 10, the two DMD segments provide a higher intensity luminous distribution about the center of the vertical axis. There is also more light intensity added near the hot spot, illustrated by the number 22,000. In one embodiment, the two segments are separate modules. However, the two segments could be combined into a single module.

    [0038] The luminous intensity distribution pattern of Fig. 10 illustrates a central region about the vertical axis in which a road-writing image can be projected into the central region of the road surface in front of the vehicle. In addition, all low beam test points can achieve a pass rating for standard vehicle headlamp requirements using embodiments described herein.

    [0039] Fig. 11 is a block diagram illustrating activation of various segments of a headlamp low beam distribution. Fig. 11 illustrates a standard distribution with no DMD activation, i.e. no road-writing activation or capabilities. Fig. 11 illustrates eight flat segments 1110, and a first kink 1120 located primarily below the horizontal axis and primarily to the right of the vertical axis. A second kink 1130 is located just below the horizontal axis and equally about the vertical axis. The second kink 1130 is wider than the first kink 1120.

    [0040] Fig. 12 is a block diagram of the headlamp low beam distribution during activation of road-writing features. Four of the flat segments 1110 located to the left of the vertical axis are activated, one or more middle flat segments 1110 (out of view) are inactivated during activation of road-writing features, and three of the flat segments 1110 located to the right of the vertical axis are activated at a reduced power level. Other power level settings for the activated flat segments 1110 are contemplated by embodiments described herein and are dependent upon the final headlamp implementation.

    [0041] A near-field DMD segment 1140 has road-writing features for image projection near the front of the vehicle. When the near-field DMD segment 1140 is activated, the one or more middle flat segments 1110 located in the vicinity of the near-field DMD segment 1140 are inactivated. In Table 1, three middle flat segments 1110 are inactivated during activation of the near-field DMD segment 1140. In addition, a far-field DMD segment 1150 has complementary road-writing features to provide contrast lighting for the projected image upon the horizon. When the far-field DMD segment 1150 is activated, the first kink 1120 is inactivated. If the first kink 1120 is still activated during image projection, it creates too much parasitic light and as a result, it reduces the contrast between the projected image from the near-field DMD segment 1140 and the background. In addition, a safety issue can be created if the first kink 1120 is a laser diode. Therefore, an improved result is obtained by inactivating the first kink 1120 when using the DMD segments. The second kink 1130 is still activated.

    [0042] When the DMD segments are not activated to project an image, the headlamp low beam distribution resorts to the configuration of Fig. 11. When road-writing features are not activated, the one or more middle flat segments 1110 and the first kink 1120 are activated.

    [0043] Fig. 13 is a block diagram illustrating the headlamp low beam distribution of Fig. 11, except there are a larger number of flat segments 1110, labeled as F1-F16. Additional flat segments 1110 provide a mechanism for better control of the final headlamp. Fig. 13 illustrates sixteen flat segments 1110. However, more or less than sixteen flat segments 1110 are contemplated by embodiments described herein and depend upon the final desired headlamp implementation.

    [0044] Fig. 14 is a block diagram illustrating the headlamp low beam distribution of Fig. 13 with two rows of flat segments 1110 for a total of thirty two flat segments 1110, labeled as F1-F32. In one embodiment, the smaller-sized upper row of flat segments 1110 has an increased power level. However, other variations can be implemented having two separate rows of flat segments 1110. In addition, the total number of flat segments 1110 can vary and depend upon a final desired headlamp implementation.

    [0045] Fig. 15 is a block diagram illustrating a headlamp low beam distribution with road-writing features, similar to Fig. 12. Fig. 15 also includes two rows of flat segments 1110 as illustrated in Fig. 14. In Fig. 15, the flat segments 1110 in the top row are activated at full power. The flat segments 1110 on the left side of the bottom row are activated at full power, while the flat segments 1110 in the middle and on the right side of the bottom row are not activated.

    [0046] The smaller-sized flat segments 1110 in the upper row of Fig. 15 can provide a higher power level capability. In one embodiment, an optical system can be projected via the increased power level of the flat segments 1110 in the upper row. In a second embodiment, the flat segments 1110 on the right side of the bottom row can be activated at a lower power level.

    [0047] Fig. 12 and Fig. 15 illustrate the advantages of embodiments described herein. The headlamp low beam distribution illustrates a configuration of flat segments 1110, a second kink 1130, a near-field DMD segment 1140, and a far-field DMD segment 1150 for road-writing capabilities. A clear image with a contrasting background is projected onto the road surface, which also maintains satisfactory vehicle headlamp standards.

    [0048] Fig. 16 illustrates a functional block diagram of a low beam headlamp assembly 1600. Low beam headlamp assembly 1600 includes a low beam control circuit 1605, a laser diode module 1610, and an LED module 1615. One or more optional modules 1620 include additional LED modules, aside from LED module 1615. An input signal 1625 is connected to the low beam control circuit 1605. The input signal 1625 can be a switch to initiate or close power to one or more of the laser diode module 1610, the LED module 1615, and the optional LED module(s) 1620. Other types of input signals 1625 are contemplated by embodiments described herein, such as a light/dark input signal.

    [0049] It should be noted that while Fig. 16 illustrates low beam control circuit 1605 is included within low beam headlamp assembly 1600, low beam control circuit 1605 could also be located apart from low beam headlamp assembly 1600. Moreover, a single low beam control circuit 1605 can be employed for both a right and left low beam headlamp assembly such that the laser diode module 1610, the LED module 1615, and the optional LED module(s) 1620 are driven in a synchronized manner.

    [0050] The low beam control circuit 1605 includes circuitry configured to implement embodiments described herein for the low beam headlamp assembly 1600. The circuitry is configured at least in part, to inactivate one or more of the flat luminous segments 1110 located within the near-field road-writing segment 1140 of the low-beam distribution and inactivate the first light source, such as the first kink 1120 when the near-field road-writing segment 1140 and the far-field road-writing segment 1150 are activated.

    [0051] Fig. 17 illustrates a functional block diagram of an exemplary laser diode module 1700, which includes a laser emitter 1705, a phosphor plate 1710, a mirror 1715, and a lens 1720. Laser emitter 1705 may, in some implementations, include a laser diode with emission in the blue visible spectrum (for example, with a wavelength in the range of 360 and 480 nm). Laser emitter 1705 can, in some embodiments, be mounted on a heatsink 1707.

    [0052] The light from laser emitter 1705 is directed through phosphor plate 1710. Phosphor plate 1710 can include phosphors such as, but not limited to, YAG, LuAG, nitride, oxynitride, and the like. Phosphor plate 1710 converts the light from laser emitter 1705 to a white light. In place of phosphor plate 1710, laser emitter 1705 can be coated with a phosphor layer of similar materials.

    [0053] The light from laser emitter 1705 is reflected by mirror 1715. Mirror 1715 can, in some embodiments, include actuators and/or vibrators configured to broaden or tailor the shape of the light beam from laser emitter 1705. The light reflected from mirror 1715 passes through lens 1720. Other components can be employed in laser module 1700 to detect failure of phosphor plate 1710 or mirror 1715 to ensure the safety of laser module 1700.


    Claims

    1. A low beam headlamp assembly (110a, 110b), comprising:

    - a LED flat module (320) including a plurality of flat reflectors forming a plurality of flat luminous segments (1110) configured to produce a composite flat beam pattern of a low-beam distribution when activated;

    - a kink module (310) having a first light source (kink1) and a second light source (kink2), the first light source (kink1) providing a first kink (1120) having a maximum intensity hotspot (K1) and the second light source (kink2) providing a second kink (1130) having luminous intensity distribution (K2) wider than the first kink ;

    - a digital micro-mirror device (DMD) allowing a near-field road-writing segment (1140) to be projected, said DMD near-field road -writing segment being located about a central vertical position of the low-beam distribution;

    - a digital micro-mirror device (DMD) allowing a far-field road-writing segment (1150) to be projected, said DMD far-field road-writing segment being located above the DMD near-field road-writing segment (1140) of the low-beam distribution; and

    - circuitry configured to inactivate one or more of the flat luminous segments (1110) located within the DMD near-field road-writing segment (1140) of the low-beam distribution and inactivate the first light source (kink1) when the DMD near-field road-writing segment (1140) and the DMD far-field road-writing segment (1150) are activated.


     
    2. The low beam headlamp assembly of claim 1, wherein the circuitry is further configured to keep the second light source (kink2) activated when the near-field road-writing segment (1140) and the far-field road-writing segment (1150) are activated.
     
    3. The low beam headlamp assembly of claim 1, wherein a first power level of a first group of flat luminous segments (1110) differs from a second power level of a second group of flat luminous segments (1110).
     
    4. The low beam headlamp assembly of claim 1, wherein the plurality of flat luminous segments (1110) includes a range of seven to thirty two individual flat luminous segments(F01- F32).
     
    5. The low beam headlamp assembly of claim 1, wherein the plurality of flat luminous segments (1110) includes a first row and a second row of individual flat luminous segments.
     
    6. The low beam headlamp assembly of claim 5, wherein a first power level of the first row of individual flat luminous segments (1110) differs from a second power level of the second row of individual flat luminous segments (1110).
     
    7. The low beam headlamp assembly of claim 1, wherein the first light source (kink1) includes a laser diode light source.
     
    8. A headlamp assembly, comprising:

    - a low beam headlamp assembly (110a, 110b) according to any of the claims 1-7 configured to generate a low-beam distribution; and

    - a high beam headlamp assembly (115a, 115b) configured to generate a high-beam distribution.


     


    Ansprüche

    1. Abblendlicht-Scheinwerferbaugruppe (110a, 110b), umfassend:

    - ein LED-Flachmodul (320) mit mehreren Flachreflektoren, die mehrere flache Leuchtsegmente (1110) bilden, ausgelegt zum Erzeugen eines zusammengesetzten flachen Strahlmusters einer Abblendlichtverteilung, wenn aktiviert;

    - ein Knickmodul (310) mit einer ersten Lichtquelle (kink1) und einer zweiten Lichtquelle (kink2), wobei die erste Lichtquelle (kink1) einen ersten Knick (1120) mit einem Hotspot (K1)von maximaler Intensität liefert und die zweite Lichtquelle (kink2) einen zweiten Knick (1130) mit einer Leuchtintensitätsverteilung (K2), die breiter ist als der erste Knick, liefert;

    - eine Digitalmikrospiegeleinrichtung (DMD), die das Projizieren eines Nahfeld-Straßenschreibsegments (1140) gestattet, wobei sich das DMD-Nahfeld-Straßenschreibsegment um eine zentrale vertikale Position der Abblendlichtverteilung befindet;

    - eine Digitalmikrospiegeleinrichtung (DMD), die das Projizieren eines Fernfeld-Straßenschreibsegments (1150) gestattet, wobei sich das DMD-Fernfeld-Straßenschreibsegment über dem DMD-Nahfeld-Straßenschreibsegment (1140) der Abblendlichtverteilung befindet; und

    - eine Schaltungsanordnung, die ausgelegt ist zum Deaktivieren eines oder mehrerer der flachen Leuchtsegmente (1110), befindlich innerhalb des DMD-Nahfeld-Straßenschreibsegments (1140) der Abblendlichtverteilung, und Deaktivieren der ersten Lichtquelle (kink1), wenn das DMD-Nahfeld-Straßenschreibsegment (1140) und das DMD-Fernfeld-Straßenschreibsegment (1150) aktiviert sind.


     
    2. Abblendlicht-Scheinwerferbaugruppe nach Anspruch 1, wobei die Schaltungsanordnung weiter ausgelegt ist zum Aktivierthalten der zweiten Lichtquelle (kink2), wenn das Nahfeld-Straßenschreibsegment (1140) und das Fernfeld-Straßenschreibsegment (1150) aktiviert sind.
     
    3. Abblendlicht-Scheinwerferbaugruppe nach Anspruch 1, wobei ein erster Leistungspegel einer ersten Gruppe von flachen Leuchtsegmenten (1110) von einem zweiten Leistungspegel einer zweiten Gruppe von flachen Leuchtsegmenten (1110) differiert.
     
    4. Abblendlicht-Scheinwerferbaugruppe nach Anspruch 1, wobei die mehreren flachen Leuchtsegmente (1110) einen Bereich von sieben bis zweiunddreißig individuellen flachen Leuchtsegmenten (F01-F32) enthalten.
     
    5. Abblendlicht-Scheinwerferbaugruppe nach Anspruch 1, wobei die mehreren flachen Leuchtsegmente (1110) eine erste Reihe und eine zweite Reihe von individuellen flachen Leuchtsegmenten enthalten.
     
    6. Abblendlicht-Scheinwerferbaugruppe nach Anspruch 5, wobei ein erster Leistungspegel der ersten Reihe von individuellen flachen Leuchtsegmenten (1110) von einem zweiten Leistungspegel der zweiten Reihe von individuellen flachen Leuchtsegmenten (1110) differiert.
     
    7. Abblendlicht-Scheinwerferbaugruppe nach Anspruch 1, wobei die erste Lichtquelle (kink1) eine Laserdiodenlichtquelle enthält.
     
    8. Scheinwerferbaugruppe, umfassend:

    - eine Abblendlicht-Scheinwerferbaugruppe (110a, 110b) nach einem der Ansprüche 1-7, ausgelegt zum Erzeugen einer Abblendlichtverteilung; und

    - eine Fernlicht-Scheinwerferbaugruppe (115a, 115b), ausgelegt zum Erzeugen einer Fernlichtverteilung.


     


    Revendications

    1. Ensemble de feu de croisement (110a, 110b) comprenant :

    - un module plat à LED (320) comprenant une pluralité de réflecteurs plats formant une pluralité de segments lumineux plats (1110) configurés pour produire un motif de faisceau plat composite ayant une distribution de faisceau de croisement lorsqu'il est activé ;

    - un module de coude (310) ayant une première source de lumière (kink1) et une seconde source de lumière (kink2), la première source de lumière (kink1) fournissant un premier coude (1120) ayant un point chaud d'intensité maximale (K1) et la seconde source de lumière (kink2) fournissant un second coude (1130) ayant une distribution d'intensité lumineuse (K2) plus large que le premier coude ;

    - un dispositif numérique à micromiroir (DMD) permettant de projeter un segment d'écriture routière en champ proche (1140), ledit segment d'écriture routière en champ proche DMD étant situé autour d'une position verticale centrale de la distribution de faisceau de croisement ;

    - un dispositif numérique à micromiroir (DMD) permettant de projeter un segment d'écriture routière en champ lointain (1150), ledit segment d'écriture routière en champ lointain du DMD étant situé au-dessus du segment d'écriture routière en champ proche du DMD (1140) de la distribution de faisceau de croisement ; et

    - des circuits configurés pour désactiver un ou plusieurs des segments lumineux plats (1110) situés à l'intérieur du segment d'écriture routière en champ proche DMD (1140) de la distribution de faisceau de croisement et pour désactiver la première source de lumière (kink1) lorsque le segment d'écriture de route en champ proche DMD (1140) et le segment d'écriture de route en champ lointain DMD (1150) sont activés.


     
    2. Ensemble de feu de croisement selon la revendication 1, dans lequel les circuits sont en outre configurés pour maintenir la seconde source de lumière (kink2) activée lorsque le segment d'écriture routière en champ proche (1140) et le segment d'écriture routière en champ lointain (1150) sont activés.
     
    3. Ensemble de feu de croisement selon la revendication 1, dans lequel un premier niveau de puissance d'un premier groupe de segments lumineux plats (1110) diffère d'un second niveau de puissance d'un second groupe de segments lumineux plats (1110).
     
    4. Ensemble de feu de croisement selon la revendication 1, dans lequel la pluralité de segments lumineux plats (1110) comprend une gamme de sept à trente-deux segments lumineux plats individuels (F01 - F32) .
     
    5. Ensemble de feu de croisement selon la revendication 1, dans lequel la pluralité de segments lumineux plats (1110) comprend une première rangée et une seconde rangée de segments lumineux plats individuels.
     
    6. Ensemble de feu de croisement selon la revendication 5, dans lequel un premier niveau de puissance de la première rangée de segments lumineux plats individuels (1110) diffère d'un second niveau de puissance de la seconde rangée de segments lumineux plats individuels (1110) .
     
    7. Ensemble de feu de croisement selon la revendication 1, dans lequel la première source de lumière (kink1) comprend une source de lumière à diode laser.
     
    8. Ensemble de phare, comprenant :

    - un ensemble de feu de croisement (110a, 110b) selon l'une quelconque des revendications 1 à 7, configuré pour générer une distribution de faisceau de croisement ; et

    - un ensemble de feu de route (115a, 115b) configuré pour générer une distribution de feu de route.


     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description