WO2019218644A1 - 光源装置及汽车前照灯 - Google Patents

光源装置及汽车前照灯 Download PDF

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Publication number
WO2019218644A1
WO2019218644A1 PCT/CN2018/118828 CN2018118828W WO2019218644A1 WO 2019218644 A1 WO2019218644 A1 WO 2019218644A1 CN 2018118828 W CN2018118828 W CN 2018118828W WO 2019218644 A1 WO2019218644 A1 WO 2019218644A1
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Prior art keywords
light
laser
light source
fiber
source device
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PCT/CN2018/118828
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English (en)
French (fr)
Inventor
徐梦梦
李明亮
胡飞
Original Assignee
深圳市绎立锐光科技开发有限公司
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Publication of WO2019218644A1 publication Critical patent/WO2019218644A1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • 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
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of optoelectronic technology, and in particular, to a light source device and a car headlight.
  • White light illumination using laser diodes is suitable for special lighting such as laser lights.
  • the commonly used laser headlamp scheme is a laser fluorescence scheme: a blue laser is used as a light source to excite a yellow fluorescent material, and the converted yellow light and the unconverted blue light are mixed to obtain white light.
  • the excitation light power density is too high, which tends to cause a decrease in the conversion efficiency of the wavelength conversion element.
  • adaptive laser headlamps are attracting more and more attention.
  • the current technical solutions for implementing adaptive laser headlamps are adaptive.
  • the structure contains moving parts, and the structure and control are more complicated.
  • the present invention provides a light source device and an automobile headlight, which can avoid the problem that the conversion efficiency of the wavelength conversion element is lowered due to excessive excitation power density when the laser is used as the excitation light source, and at the same time realize the front illumination.
  • Photo light distribution adjustment function
  • a first aspect of the present invention provides a light source device, which is applied to a headlight of a transportation tool, comprising:
  • At least one laser for emitting a laser, each of the at least one laser having at least one light output;
  • the side-emitting optical fiber array board includes at least two side-emitting optical fibers, and an optical input end of each of the side-emitting optical fibers is connected to a light output end of the corresponding at least one laser, wherein:
  • a wavelength conversion element is disposed on a light exit surface side of the side light emitting fiber array board, and a light emitting direction of the side light emitting fiber array board is consistent with a light emitting direction of the light source device;
  • a control element for adjusting the opening and/or closing of the respective laser in the preset illumination mode.
  • a second aspect of the invention provides an automobile headlight comprising the light source device as described above.
  • the light source device and the automobile headlight provided by the invention can convert the high-power and high-density point light source emitted by the laser into a surface light source with low power density by using the side-emitting optical fiber array plate, and then the laser excitation wavelength conversion component can be obtained.
  • the white light source light source can avoid the problem that the conversion efficiency of the wavelength conversion element is lowered when the excitation light source is too high when the laser light is used as the excitation light source.
  • the laser light emitted by the first laser enters the first side light-emitting fiber through its light output end, and the laser light is uniformly leaked out by the characteristics of the first side light-emitting fiber to form a line light source.
  • the laser light emitted by the second laser enters the second side light-emitting fiber through the light output end thereof, and the laser light is uniformly leaked out by the characteristics of the second side light-emitting fiber to form a line light source.
  • the light is converted by the wavelength converting element to convert the light into a visible light that meets the expected visible light, and the first side illuminating arranged in a preset manner
  • the line source corresponding to the fiber and/or the second side illuminating fiber can form a surface light source.
  • the control element may adjust the opening and/or closing of the corresponding laser according to the preset illumination mode, thereby achieving the corresponding illumination mode.
  • the switch of the light output end can realize the switching between the low beam illumination mode and the high beam illumination mode, and can adaptively adjust the illumination intensity of the surface light source within a certain range of light intensity, thereby improving the light utilization rate of the light source device.
  • FIG. 1 is a schematic view showing a component connection structure of a light source device according to an embodiment of the present invention
  • FIG. 2 is a schematic view showing the structure of components of a light source device according to an embodiment of the present invention
  • FIG. 3 is a schematic view showing a specific structure of the side-emitting optical fiber array board of FIG. 2;
  • FIG. 4 is a schematic view showing another specific structure of the side-emitting optical fiber array board of FIG. 2;
  • Figure 5 is a schematic view showing a specific structure of the wavelength conversion element of Figure 2;
  • FIG. 6 is a schematic diagram showing the effect and corresponding structure of the headlight provided by the present invention in a non-steering illumination mode
  • FIG. 7 is a schematic view showing the effect and corresponding structure of the headlight provided by the present invention under the illumination of the steering mode;
  • FIG. 8 is a schematic structural view of a component position of a light source device according to another embodiment of the present invention.
  • FIG. 9 is a schematic structural view of a component position of a light source device according to still another embodiment of the present invention.
  • FIG. 10 is a schematic structural view of an automobile headlamp provided by the present invention.
  • Second sub-wavelength conversion element 232 Second sub-wavelength conversion element 232
  • the laser has a high excitation light power density, and thus there is a problem that the conversion efficiency of the wavelength conversion element to the laser light is lowered.
  • the current technical solutions for implementing adaptive laser headlamps include two.
  • the first scheme is to use a mirror or a micro-mirror to divert the laser beam to the wavelength conversion component and scan the wavelength conversion component.
  • the method generates a light pattern, and the wavelength conversion element converts the light pattern of the laser into a white light pattern and projects onto the traffic lane through the projection optical element to realize an adaptive function;
  • the second scheme is that the wavelength conversion component first converts the laser into white light, and then passes through the DOE.
  • Optical elements such as and/or FOE are modulated to obtain an adaptive light distribution.
  • both technical solutions include moving parts, and the structure and control are complicated.
  • the present invention provides a light source device and a car headlight to solve the above problems.
  • the light source device of the present invention can be applied to a headlight of a transportation vehicle, and the headlamp can have a low beam illumination and a high beam illumination function.
  • the transportation means can be a car, a train, a riding tool, and the like.
  • a light source device 1 includes a laser for emitting laser light, and a side-emitting optical fiber array for uniformly leaking laser light to form a plurality of line light sources.
  • a plate 12 for controlling the intensity of the laser and/or the intensity of the laser, and a wavelength conversion for converting the plurality of laser beams emitted from the side-emitting fiber array plate 12 into visible light (illumination light) of a specific wavelength Element 14.
  • the laser may include a first laser 111 and a second laser 112, wherein a light output end of the first laser 111 is coupled to an input end of the first side illumination fiber 121, and a light output end and a second side illumination of the second laser 112 The input ends of the optical fibers 122 are connected.
  • the white light illumination of the laser diode has the advantages of high electro-optical conversion efficiency, high brightness, inefficient sag, and small volume.
  • the first side illuminating fiber 121 is arranged in a first manner on a first area of the side illuminating fiber array board 12, and the second side illuminating fiber 122 is also arranged in a preset manner on the side illuminating fiber array board 12. Two areas.
  • the first area corresponds to a low beam distribution area of the headlight
  • the first area and the second area together form an area corresponding to a high beam distribution area of the headlight
  • the near area The light distribution region supports the realization of the low beam illumination function of the headlights, which is used to support the realization of the high beam illumination function of the headlights.
  • the arrangement in a preset manner may determine a corresponding planar arrangement shape according to the length of the side illumination fiber. If the side illumination fiber is long, the side illumination fiber may be repeatedly folded back.
  • the corresponding areas of the side-emitting optical fiber array board are arranged in a planar form; if the side-emitting optical fibers are short, the arrangement may be arranged in a planar manner in a corresponding area of the side-emitting optical fiber array board in a linear manner.
  • the side illuminating fiber is long, it is easy to form a surface light source by deploying in a plane form by repeated folding back. Therefore, when the side illuminating fiber is disposed, a small number of side illuminating lights can be disposed. If the side illuminating fiber is short, it is difficult to form a surface light source by linearly deploying the planar light source. Therefore, when the side illuminating fiber is disposed, a larger number of side illuminating fibers can be disposed.
  • the wavelength conversion element 14 is disposed on a side of the side light emitting fiber array board 12 adjacent to the light exit surface of the headlight, that is, the light emitted by the side light emitting fiber array board 12 passes through the wavelength conversion element 14. After the conversion action, the visible light obtained by the conversion action can be directly emitted as the illumination light of the headlight.
  • the control element 13 can be used to adjust the opening and/or closing of the respective laser in a preset illumination mode.
  • the adjusting the opening and/or closing of the corresponding laser in the preset illumination mode may include:
  • the corresponding first laser 111 connected to the optical input end of the first side illumination fiber 121 is adjusted to an on state
  • the second side The corresponding second laser 112 connected to the optical input end of the illuminating fiber 122 is adjusted to a closed state
  • the optical input end of the first side illuminating fiber 121 is The connected first laser 111 is adjusted to an on state
  • the corresponding second laser 112 connected to the optical input end of the second side illumination fiber 122 is adjusted to an on state.
  • the laser light emitted from the first laser 111 enters the first side light-emitting fiber 121 through the light output end thereof, and the laser light is uniformly leaked by the characteristics of the first side light-emitting fiber 121 to form a line light source.
  • the laser light emitted by the second laser 112 enters the second side light-emitting fiber 122 through the light output end thereof, and the laser light is uniformly leaked by the characteristics of the second side light-emitting fiber 122 to form a line light source.
  • the light is converted by the wavelength conversion element 14 to convert the light into a visible light that is expected to be arranged in a predetermined manner.
  • the line source corresponding to the side illuminating fiber and/or the second side illuminating fiber can form a surface light source.
  • the control element 13 can adjust the opening and/or closing of the corresponding laser according to the preset illumination mode, thereby realizing the corresponding illumination mode.
  • the illumination function and the corresponding effect are realized.
  • the light distribution intensity of the laser and the arrangement of the side-emitting optical fibers in the side-emitting optical fiber array board 12 can be controlled by the control element 13 to realize the light distribution adjustment function conforming to the national standard of the automobile headlight, by controlling the laser or the laser.
  • the switch of the light output end can realize the switching between the low beam illumination mode and the high beam illumination mode, and can adjust the illumination intensity of the surface light source within a certain light intensity range, thereby improving the light utilization rate of the light source device.
  • first laser 111 and the second laser 112 herein can be replaced by one laser having a plurality of light output ends, and a plurality of firsts can be disposed in the first region of the side light-emitting fiber array panel 12.
  • a plurality of second side illuminating fibers 122 may be disposed in the second region, and a plurality of light output ends may be respectively connected to the input ends of the corresponding first side illuminating fiber 121 and the second side illuminating fiber 122, and The light output of the individual light outputs of the laser can be controlled by the control element 13.
  • one or more numbers of lasers may be utilized and controlled by, for example, control elements to achieve the adaptive function of the present embodiment.
  • a lens may also be provided on the light exit side of the wavelength conversion element 14 for further light processing of the light, which may include convergence and/or divergence.
  • the side-emitting optical fiber array board of the light source device 1 can convert a high-power and high-density point light source emitted by the laser into a surface light source with a low power density, and then the laser-excited wavelength conversion element can obtain a white-light surface light source. It is possible to avoid the problem that the conversion efficiency of the wavelength conversion layer is lowered when the excitation light source is excessively high when the laser light is used as the excitation light source.
  • the high-power and high-density laser emitted by the laser enters the side-emitting optical fiber, and the optical fiber uniformly leaks light to obtain a line light source, and the specific surface light source can be obtained according to the arrangement shape of the side-emitting optical fiber (the side-emitting optical fiber array board 12)
  • the surface light source is a new laser light source, and the emitted laser light is converted by the wavelength conversion element 14 to obtain an outgoing light corresponding to the light distribution of the excitation light source.
  • the illumination intensity of the laser and/or the arrangement of the side-emitting fibers in the side-emitting fiber array panel 12 can be controlled to achieve the light distribution requirements of the national standard of the headlamp, and at the same time, the corresponding laser can be controlled. Turning on or off and the intensity of the laser light can achieve the function of adjusting the illumination distribution of the light.
  • the national standard of the headlights is that the low beam illumination has a clear and distinct cut-off line, and the upper part of the cut-off line is a dark area to avoid dazzling of the incoming vehicle, and the lower part of the cut-off line is a bright area, Provide adequate illumination on the pavement and on both sides.
  • the side-emitting optical fiber array board includes a first area corresponding to the low-beam light distribution area of the headlight, and an area corresponding to the high-beam light distribution area formed by the first area and the second area, and the near-light distribution is realized.
  • Light source integrated structure includes a first area corresponding to the low-beam light distribution area of the headlight, and an area corresponding to the high-beam light distribution area formed by the first area and the second area, and the near-light distribution is realized.
  • the low beam light distribution region is a light distribution region capable of emitting a visible light that meets the expected visible light for short-distance illumination in the aforementioned low beam illumination mode.
  • the high beam light distribution area is a light distribution area capable of emitting a visible light in accordance with the expected high beam illumination mode in the above-described high beam illumination mode.
  • the light source device 2 is a schematic diagram showing the structure of components of a light source device according to an embodiment of the present invention.
  • the light source device 2 includes a laser array 21, a side-emitting optical fiber array panel 22, a wavelength conversion element 23, and a lens 24, wherein the laser array 21 A plurality of light output ends for supporting the plurality of lasers or a plurality of light output ends of the laser output laser light to the light input ends of the side light emitting fibers in the side light emitting fiber array panel 22.
  • the laser light emitted from the laser array 21 is applied by the side illuminating fiber
  • the laser light emitted from the side illuminating fiber array plate 22 is emitted to the wavelength conversion element 23, and after being converted by the wavelength conversion element 23, the conversion is formed.
  • the visible light exits the light source device 2 after the light treatment of the lens 24.
  • FIG. 3 is a schematic diagram of a specific structure of the side-emitting optical fiber array board of FIG. 2, the side-emitting optical fiber array board has a square shape, including an A area (first area) and a B area (second area), The boundary line between the A region and the B region includes two straight segments that are parallel to each other and a sloped segment between the two straight segments, such that the A region is complementary to the B region to form a square shape.
  • the side-emitting optical fiber array board is a schematic diagram of a specific structure of the side-emitting optical fiber array board of FIG. 2, the side-emitting optical fiber array board has a square shape, including an A area (first area) and a B area (second area), The boundary line between the A region and the B region includes two straight segments that are parallel to each other and a sloped segment between the two straight segments, such that the A region is complementary to the B region to form a square shape.
  • the side-emitting optical fiber array board is a schematic diagram of a specific
  • a first side light-emitting fiber 221 is disposed in the A region, and the first side light-emitting fiber 221 is connected to the first laser 211.
  • a second side illuminating fiber 222 is disposed in the B region, and the second side illuminating fiber 222 is coupled to the second laser 212.
  • the first side light-emitting fibers 221 are arranged in the A region in an S-shaped plane, and the second-side light-emitting fibers 222 are arranged in the B region in an S-shaped plane.
  • the S-shape in the present embodiment is a planar arrangement pattern formed by a repeated foldback method.
  • the surface light irradiation area formed by the arrangement of the first side light-emitting fibers 221 can correspond to the low-beam light distribution area of the test light distribution at the twenty-five meter required by the automobile headlight standard.
  • the surface light illumination area formed by the arrangement of the first side light-emitting fiber 221 and the second side light-emitting fiber 222 may correspond to the high beam light distribution area of the automobile headlight.
  • the positions of the first laser 211 and the second laser 212 are oppositely disposed, and the unfolded sections of the side-emitting optical fibers connected to the respective lasers are oppositely extended.
  • first laser 221 and the second laser 212 can also be disposed in parallel with each other, and the unfolded sections of the side-emitting optical fibers of the respective lasers are extended in parallel with each other.
  • the degree of density of repeated folding of the side-emitting optical fiber can be set according to specific lighting requirements.
  • the areas of the A area and the B area can be equal.
  • the adaptive headlamp function can be realized by controlling the luminous intensity of each laser.
  • the side-emitting optical fiber array panel of FIG. 3 can be regarded as a structure in the right headlamp.
  • the second laser 212 in the B region is turned off; and the first corresponding to the first side illumination fiber 221 is adjusted.
  • the luminous intensity of a laser 211 is to the first brightness.
  • the second laser 212 in the B region is turned off; and the first corresponding to the first side illuminating fiber 221 is adjusted.
  • the illumination intensity of a laser 211 is to a second brightness, and the second brightness is greater than the first brightness.
  • the illuminating intensity at the end of the first side illuminating fiber 221 is increased, and the effect includes illuminating the rightmost side.
  • the front area thereby achieving the adaptive function of the headlights.
  • the side illuminating fiber array board and the wavelength conversion component may also be disposed on a movable mechanism, and the movable mechanism may adjust the illuminating fiber array board and the wavelength conversion when the vehicle is turned
  • the adaptive headlight function is realized by the direction of the visible light formed by the element.
  • the side-emitting optical fiber array board has a square shape, including an A area (first area) and a B area (second area).
  • the boundary line between the A region and the B region includes two straight segments that are parallel to each other and a sloped segment between the two straight segments, such that the A region is complementary to the B region to form a square shape.
  • the side-emitting fiber array board has a square shape, including an A area (first area) and a B area (second area).
  • the boundary line between the A region and the B region includes two straight segments that are parallel to each other and a sloped segment between the two straight segments, such that the A region is complementary to the B region to form a square shape.
  • a plurality of first side light-emitting fibers 221 are disposed in the A region, and each of the first side light-emitting fibers 221 is connected to the corresponding first laser 211.
  • a plurality of second side illuminating fibers 222 are also disposed in the B region, and each of the second side illuminating fibers 222 is coupled to the corresponding second laser 212.
  • the number of the first side illuminating fibers 221 and the number of the second side illuminating fibers 222 may be the same, and the positions of the first side illuminating fibers 221 and the second side illuminating fibers 222. Correspond to each other.
  • the ends of the first side illuminating fibers 221 may be disposed adjacent to the ends of the corresponding second side illuminating fibers 222, and the optical input ends of the first side illuminating fibers 221 and the first The light input ends of the two side illuminating fibers 222 are disposed away from each other.
  • first side illuminating fiber 221 and the second side illuminating fiber 222 are arranged in a planar manner in a corresponding area in a linear manner.
  • Each of the first side light-emitting fibers 221 is disposed in parallel with each other, and each of the second side light-emitting fibers 222 is also disposed in parallel with each other.
  • the aforementioned preset illumination mode may further include a steering illumination mode.
  • the at least one laser and/or the corresponding root corresponding to the first side illuminating fiber 221 of the corresponding root and the corresponding number may be adjusted according to a preset control strategy. And opening or closing the at least one laser corresponding to the corresponding number of the second side illuminating fibers 222.
  • the preset control strategy may be: the second laser 212 corresponding to each of the second side illumination fibers 222 in the B region is turned off.
  • the first laser 211 corresponding to the four first side illuminating fibers 221 in the A region from the leftmost to the right in the figure is closed, and the first first illuminating fiber 221 in the A region corresponds to the first one.
  • the lasers 211 are both turned on.
  • the illumination effect may be the ground within twenty-five meters of the front side of the headlight (the viewing angle of the view may be regarded as the angle of view viewed from the back).
  • the preset control strategy may be: the second lasers 212 corresponding to the second side illuminating fibers 222 in the B region are all turned off, The first lasers 211 corresponding to the first side illuminating fibers 221 in the A region are all turned on. At this time, the first lasers 211 corresponding to the leftmost four first side illuminating fibers 221 in the A region are both Open, so that the illumination effect can be to illuminate the ground within 25 meters in front of the headlight and the ground on the left side of the front side, thereby realizing the adaptive headlight function.
  • the second lasers 212 corresponding to the second side illumination fibers 222 in the B region can be simultaneously opened, and the roots in the A region are The first laser 211 corresponding to one side of the light-emitting fiber 221 is turned on.
  • the light intensity of each of the first lasers close to left to right may be sequentially decreased; In the diverted illumination mode (turning to the right), the luminous intensity of each of the first lasers located on the right side can be increased, so that the adaptive headlamp function can be realized as well.
  • the wavelength conversion element 23 includes a first sub-wavelength conversion element 231 and a second sub-wavelength conversion element 232, in which the first sub-wavelength conversion element A barrier layer 233 is disposed between the 231 and the second sub-wavelength conversion element 232.
  • barrier layer 233 provided may be advantageous for providing the illumination pattern with a clear near-light cutoff.
  • the first sub-wavelength conversion element 231 includes an A' region, which may correspond to the A region of the side-emitting optical fiber array panel; the second sub-wavelength conversion element 232 includes a B' region, which can be combined with the side-emitting optical fiber
  • the B area of the array board corresponds.
  • the barrier layer 233 can correspond to the boundary between the two regions of the side-emitting fiber array board.
  • the A' region may also correspond to the low beam distribution region of the headlamp, which together constitute a region corresponding to the high beam distribution region of the headlamp.
  • the barrier layer 233 may include a light diffusing reflective layer or a light absorbing layer, wherein when the barrier layer 233 is a light diffusing reflective layer, it may be a high reflective aluminum and a scattering particle containing titanium dioxide.
  • FIG. 6 it is a schematic diagram of the effect and corresponding structure of the headlight provided by the present invention in the non-steering illumination mode.
  • the figure includes the structure of the side-emitting optical fiber array board in FIG. 4, as shown in the figure, in the non-steering illumination mode, the left and right headlights are substantially directed forward, wherein the dotted frame in the right structure ( The central portion indicates the number and position of the first side light-emitting fibers 221 that emit light at this time, and the wavelength conversion element 23 located on the front side of the side-emitting fiber array plate converts the light received therefrom.
  • FIG. 7 it is a schematic diagram of the effect and corresponding structure of the headlight provided by the present invention under the illumination of the steering mode.
  • This figure includes the structure of the side-emitting optical fiber array board in FIG. 4, as shown in the figure, the car is in the steering illumination mode (steering to the left), and the left and right headlights are generally illuminated to the left-facing front, the right side structure
  • the dotted line frame (on the left side) indicates the number and position of the first side light-emitting fibers 221 that are illuminated at this time, and the wavelength conversion element 23 located on the front side of the side-emitting fiber array board converts the light received therefrom.
  • the first side illuminating fiber 221 of the illuminating light is shifted to the left, so that it can illuminate more areas on one side of the direction of the car, which helps to improve the driver's vision when turning. Safety.
  • Fig. 8 there is shown a schematic structural view of a component of a light source device according to another embodiment of the present invention.
  • the difference from the light source device of the foregoing embodiment is that the light source device 3 of the present embodiment further includes the light diffusing element 33.
  • the specific solutions applicable to the foregoing embodiments may be correspondingly applied to the present embodiment. To save space and avoid repetition, no Let me repeat.
  • the light diffusing element 33 is disposed between the side emitting fiber array plate 32 and the wavelength converting element 34.
  • the laser array is used to support the light output end of the laser to output laser light to the light input end of the side illuminating fiber in the side illuminating fiber array panel 32.
  • the laser light emitted from the laser array 31 is applied to the side light-emitting fiber
  • the laser light emitted from the side light-emitting fiber array plate 32 is emitted to the light diffusing element 33, and is emitted to the wavelength by the light diffusing element 33.
  • the laser of the conversion element 34 is more uniform.
  • the wavelength conversion element 34 converts the received laser light, and the converted visible light is emitted by the lens to exit the light source device 3.
  • FIG. 9 is a schematic diagram showing a component positional structure of a light source device according to still another embodiment of the present invention, which is different from the light source device of the foregoing embodiment in that the light source device 4 of the present embodiment includes a substrate 42, specifically, the present embodiment.
  • the laser array 41 of the light source device 4 is for supporting the light output end of the laser to output laser light to the light input end of the side light emitting fiber in the side light emitting fiber array plate 43.
  • the side illuminating fiber array plate 43 is disposed on a side of the substrate 42 having a reflective layer, so that the outgoing light emitted from the side illuminating fiber array plate 43 toward the substrate 42 can be reflected by the reflective layer.
  • the laser light is emitted onto the wavelength conversion element 44.
  • the material of the substrate 42 may be a high thermal conductivity material such as aluminum, copper, and/or silver.
  • a plurality of pits may be disposed on the substrate 42, and the reflective layer may be disposed in the plurality of pits to reflect the laser light received by the pit.
  • a plurality of dimples may be disposed on the substrate 42 in an S-shaped arrangement.
  • the reflective layer in the pit can be prepared by evaporation, and the refractive index of the inner wall of the pit is preferably controlled to be 70% or more, thereby improving the light-emitting efficiency in the forward direction, thereby causing the wavelength conversion element 44. More lasers can be received and more lasers can be converted.
  • the laser light emitted from the laser array 41 is illuminated by the side-emitting optical fiber in the side-emitting optical fiber array panel 43, and a part of the laser light is directly received by the wavelength conversion element 44; at the same time, the reflective layer of the substrate 42 is received.
  • the laser light reflects, and the reflected laser light propagates toward the wavelength conversion element 44, and the reflected laser light is received by the wavelength conversion element 44.
  • the wavelength conversion element 44 wavelength-converts the received laser light to obtain a desired visible light, which is emitted by the lens 45 and exits the light source device 4.
  • FIG. 10 is a schematic structural view of an automobile headlamp provided by the present invention.
  • the automobile headlight 5 may include the foregoing light source device 51. With the light source device 51, the automobile headlight 5 can realize the far and near light corresponding to
  • the light source structure has a simple structure integrated, and the control element included in the light source device can adjust the luminous intensity, thereby improving the utilization rate of the light source. At the same time, the control element controls the switch of the light output end of the corresponding laser or laser, and the corresponding low beam light can be realized.
  • the switching between the illumination mode and the high beam illumination mode can meet the light distribution of the national standard for automotive headlamps.
  • the light source device provided by the present invention does not involve moving parts, the structure involved in implementing the adaptive function of headlight illumination is relatively simple and easy to control.
  • the side-emitting optical fiber array board of the light source device 51 can convert a high-power and high-density point light source emitted by the laser into a surface light source with a low power density, and then the laser-excited wavelength conversion element can obtain a white-light surface light source. It is possible to avoid the problem that the conversion efficiency of the wavelength conversion layer is lowered when the excitation light source is excessively high when the laser light is used as the excitation light source.
  • a plurality of units, modules or devices as set forth in the claims of the system, the device or the terminal device can also be implemented by the same unit, module or device by software or hardware.
  • the first, second, etc. words are used to denote names and do not denote any particular order.

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Abstract

一种光源装置（1）及汽车前照灯（5），涉及光电技术领域。其中，光源装置（1）包括激光器、侧发光光纤阵列板（12）、波长转换元件（14）及控制元件（13），控制元件（13）用于调整相应的激光器的开启和/或关闭。光源装置（1）可避免在将激光作为激发光源时，激发光功率密度过高易引起的波长转换元件（14）的转换效率降低的问题，同时实现前照灯（5）光照的光分布调整功能。

Description

光源装置及汽车前照灯 技术领域
本发明涉及光电技术领域，尤其涉及一种光源装置及汽车前照灯。
背景技术
本部分旨在为权利要求书及具体实施方式中陈述的本发明的实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。
利用激光二极管进行白光照明适用于特殊照明如激光车灯等领域。目前常用的激光汽车前照灯方案为激光荧光方案：蓝色激光作为光源，激发黄色荧光材料，转换得到的黄光和未被转换的蓝光混合得到白光。然而，将激光作为激发光源存在激发光功率密度过高易引起波长转换元件的转换效率降低的问题。与此同时，为避免炫目问题和实现弯道照明，自适应的激光汽车前照灯引起越来越多的关注，然而，目前常用的实现自适应激光前照灯的技术方案实现自适应功能的结构均包含活动部件，结构及控制较为复杂。
发明内容
鉴于上述，本发明提供一种光源装置及汽车前照灯，可避免在将激光作为激发光源时，激发光功率密度过高易引起的波长转换元件的转换效率降低的问题，同时实现前照灯光照的光分布调整功能。
本发明第一方面提供一种光源装置，应用于运输工具的前照灯，包括：
用于发出激光的至少一激光器，每一所述至少一激光器均具有至 少一光输出端；
侧发光光纤阵列板，包括至少两根侧发光光纤，每一根侧发光光纤的光输入端与相应的所述至少一激光器的一光输出端连接，其中：
至少一根第一侧发光光纤按预设方式排布于所述侧发光光纤阵列板的第一区域；及
至少一根第二侧发光光纤按预设方式排布于所述侧发光光纤阵列板的第二区域，所述第一区域与所述前照灯的近光光分布区域相对应，所述第一区域、所述第二区域与所述前照灯的远光光分布区域相对应；
波长转换元件，设于所述侧发光光纤阵列板的光出射面一侧，所述侧发光光纤阵列板的光出射方向与所述光源装置的光出射方向一致；
控制元件，用于在预设照射模式下调整相应的激光器的开启和/或关闭。
本发明第二方面提供一种汽车前照灯，包括如上所述的光源装置。
本发明提供的光源装置及汽车前照灯，利用侧发光光纤阵列板可将激光器发出的高功率及高密度的点光源转换为功率密度较低的面光源，之后激光激发波长转换元件，可得到白光面光源，可避免在将激光作为激发光源时，激发光功率密度过高引起的波长转换元件的转换效率降低的问题。第一激光器发出的激光经其的光输出端进入第一侧发光光纤中，利用第一侧发光光纤的特性将激光均匀漏泄出来以形成线光源。同理，第二激光器发出的激光经其的光输出端进入第二侧发光光纤中，利用第二侧发光光纤的特性将激光均匀漏泄出来以形成线光源。在形成的线光源的光线从所述侧发光光纤阵列板中出射后，由波长转换元件对光进行转换，以将光转换成符合预期的可见光，而按预设方式排布的第一侧发光光纤和/或第二侧发光光纤所对应的线 光源则可形成面光源。在所述激光器发出激光和/或面光源处于任一照射模式期间，所述控制元件可根据预设照射模式调整相应的激光器的开启和/或关闭，从而实现所述预设照射模式所对应的照射功能及相应效果的实现。与此同时，还可通过控制元件控制激光器的发光强度及设置侧发光光纤阵列板中的侧发光光纤的排布实现符合汽车前照灯国家标准的光分布调整功能，通过控制相应激光器或激光器的光输出端的开关即可实现近光灯照射模式与远光灯照射模式的切换，且可在一定的光强范围内自适应性地调整面光源的发光强度，可提高光源装置的光利用率。
附图说明
为了更清楚地说明本发明实施方式的技术方案，下面将对实施方式描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明一实施方式的光源装置的元件连接结构示意图；
图2是本发明一具体实施方式的光源装置的元件位置结构示意图；
图3是图2中的侧发光光纤阵列板的一种具体结构的示意图；
图4是图2中的侧发光光纤阵列板的另一种具体结构的示意图；
图5是图2中的波长转换元件的一种具体结构的示意图；
图6是本发明提供的前照灯处于非转向照射模式下的效果及对应结构示意图；
图7是本发明提供的前照灯处于转向模式照射下的效果及对应结构示意图；
图8是本发明另一实施方式的光源装置的元件位置结构示意图；
图9是本发明又一实施方式的光源装置的元件位置结构示意图；
图10是本发明提供的一种汽车前照灯的结构示意图。
主要元件符号说明
光源装置                 1、2、3、4、51
第一激光器               111、211
第二激光器               112、212
激光器阵列               21、31、41
侧发光光纤阵列板         12、22、32、43
第一侧发光光纤           121、221
第二侧发光光纤           122、222
控制元件                 13
波长转换元件             14、23、34、44
第一子波长转换元件       231
第二子波长转换元件       232
阻隔层                   233
光扩散元件               33
基底                     42
透镜                     24、35、45
汽车前照灯               5
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式及实施方式中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，所描述的实施方式仅仅是本发明一部分实施方式，而不是全部的实施方 式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本发明。
一般而言，激光的激发光功率密度较高，因而存在易导致波长转换元件对激光的转换效率降低的问题。与此同时，目前常用的实现自适应激光前照灯的技术方案包括两种，第一种方案为采用震镜或微反射镜等将激光光束转向至波长转换元件，在波长转换元件上以扫描的方式产生光图案，波长转换元件将激光的光图案转换为白光图案经投影光学元件投射至行车道上，实现自适应功能；第二种方案为波长转换元件先将激光转换为白光，之后经DOE和/或FOE等光学元件调制得到自适应光分布。然而，在实现自适应功能时，两种技术方案均包括活动部件，结构及控制复杂。
基于上述，本发明提供一种光源装置及汽车前照灯，以解决上述问题。
本发明的光源装置可应用于运输工具的前照灯，所述前照灯可具有近光照射和远光照射功能。
可以理解的是，所述运输工具可以是汽车、火车及骑行工具等。
参见图1，是本发明一实施方式的光源装置的元件连接结构示意图，图中，光源装置1包括用于发出激光的激光器、用于将激光均匀漏泄以形成多个线光源的侧发光光纤阵列板12、用于控制激光器的开关和/或激光器的发光强度的控制元件13及用于将所述侧发光光纤阵列板12发出的多束激光转换成特定波长的可见光(照明光)的波长转换元件14。
所述激光器可包括第一激光器111和第二激光器112，其中，第一激光器111的光输出端与第一侧发光光纤121的输入端连接，第二 激光器112的光输出端与第二侧发光光纤122的输入端连接。
可以理解的是，与白光发光二极管(Light Emitting Diode，LED)相比，激光二极管进行白光照明具有电光转换效率高、亮度高、无效率骤降现象及体积小等优势。
所述第一侧发光光纤121按预设方式排布于侧发光光纤阵列板12的第一区域，所述第二侧发光光纤122同样按预设方式排布于侧发光光纤阵列板12的第二区域。
所述第一区域与前照灯的近光分布区域相对应，所述第一区域和所述第二区域共同构成与前照灯的远光分布区域相对应的区域，而其中的所述近光分布区域支持前照灯的近光照射功能的实现，所述远光分布区域用于支持前照灯的远光照射功能的实现。
本实施方式中，所述按预设方式排布可根据侧发光光纤的长短确定相应的平面排布形状，如若所述侧发光光纤较长，则所述侧发光光纤可以以反复回折的方式在侧发光光纤阵列板的相应区域中以平面形式展开排布；若所述侧发光光纤较短，则可以以直线型方式在侧发光光纤阵列板的相应区域中以平面形式展开排布。
可以理解的是，若所述侧发光光纤较长，则其通过反复回折的方式以平面形式展开排布较易形成面光源，因而在布设侧发光光纤时，可以布设较少根数的侧发光光纤；若所述侧发光光纤较短，则其通过直线型方式以平面形式展开排布较难形成面光源，因而在布设侧发光光纤时，可布设较多根数的侧发光光纤。
本实施方式中，所述波长转换元件14设于所述侧发光光纤阵列板12靠近前照灯的光出射面的一侧，也即侧发光光纤阵列板12发出的光经过波长转换元件14的转换作用后，即可直接出射出经转换作用所得到的可见光作为所述前照灯的照射光。
所述控制元件13可用于在预设照射模式下调整相应的激光器的开启和/或关闭。
本实施方式中，所述在预设照射模式下调整相应的激光器的开启 和/或关闭具体可包括：
在所述前照灯处于近光灯照射模式下，将与所述第一侧发光光纤121的光输入端连接的相应的所述第一激光器111调整为开启状态，将与所述第二侧发光光纤122的光输入端连接的相应的所述第二激光器112调整为关闭状态；在所述前照灯处于远光灯照射模式下，将与所述第一侧发光光纤121的光输入端连接的相应的第一激光器111调整为开启状态，将与所述第二侧发光光纤122的光输入端连接的相应的所述第二激光器112调整为开启状态。
第一激光器111发出的激光经其的光输出端进入第一侧发光光纤121中，利用第一侧发光光纤121的特性将激光均匀漏泄以形成线光源。同理，第二激光器112发出的激光经其的光输出端进入第二侧发光光纤122中，利用第二侧发光光纤122的特性将激光均匀漏泄以形成线光源。在形成的线光源的光线从所述侧发光光纤阵列板12中出射后，由波长转换元件14对光进行转换，以将光转换成符合预期的可见光，而按预设方式排布的第一侧发光光纤和/或第二侧发光光纤所对应的线光源则可形成面光源。在所述激光器发出激光和/或面光源处于任一照射模式期间，所述控制元件13可根据预设照射模式调整相应的激光器的开启和/或关闭，从而实现所述预设照射模式所对应的照射功能及相应效果的实现。与此同时，还可通过控制元件13控制激光器的发光强度及设置侧发光光纤阵列板12中的侧发光光纤的排布实现符合汽车前照灯国家标准的光分布调整功能，通过控制激光器或激光器的光输出端的开关即可实现近光灯照射模式与远光灯照射模式的切换，且可在一定的光强范围内调整面光源的发光强度，可提高光源装置的光利用率。
可以理解的是，此处的第一激光器111和第二激光器112可替换为具有多个光输出端的一个激光器，而在所述侧发光光纤阵列板12的第一区域中可设置多根第一侧发光光纤121、在第二区域中可设置多根第二侧发光光纤122，多个光输出端可分别于相应的第一侧发光 光纤121、第二侧发光光纤122的输入端连接，且激光器的各个光输出端的出光与否可由所述控制元件13控制。
可以理解的是，可利用一个及以上数量的激光器并利用如控制元件对其进行控制以实现本实施方式中的自适应功能。
可以理解的是，在所述波长转换元件14的光出射一侧还可设有透镜，以对光进行进一步的光处理，所述光处理可包括汇聚和/或发散。
本实施方式中，光源装置1的侧发光光纤阵列板可将激光器发出的高功率及高密度的点光源转换为功率密度较低的面光源，之后激光激发波长转换元件，可得到白光面光源，可避免在将激光作为激发光源时，激发光功率密度过高引起的波长转换层的转换效率降低的问题。
本实施方式中，激光器发出的高功率及高密度的激光进入侧发光光纤中，光纤均匀漏光得到线光源，而根据侧发光光纤的排布形状可得到特定的面光源(侧发光光纤阵列板12)，面光源作为新的激光光源，其出射的激光经波长转换元件14的转换作用，得到与激发光光源的光分布对应的出射光。在此期间，可控制激光器的发光强度和/或侧发光光纤阵列板12中的侧发光光纤的排布，即可实现符合前照灯国家标准的光分布要求，同时，可控制相应的激光器的开启或关闭及激光器的发光强度可实现调整光的照射分布的功能。
可以理解的是，所述前照灯国家标准为：近光灯照射具有一条清晰明显的明暗截止线，截止线上方为暗区，避免对来车的眩目，截止线下方为亮区，对路面和两侧提供足够的照明。
侧发光光纤阵列板包括与前照灯的近光光分布区域相对应的第一区域、由第一区域和第二区域共同构成的与远光光分布区域相对应的区域，实现远近光分布的光源一体化结构。
可以理解的是，所述近光光分布区域为在前述的近光灯照射模式下，能够出射符合预期的可见光以进行近距离照射的光分布区域。所述远光光分布区域为在前述的远光灯照射模式下，能够出射符合预期 的可见光以进行远距离照射的光分布区域。
参见图2，是本发明一具体实施方式的光源装置的元件位置结构示意图，光源装置2包括激光器阵列21、侧发光光纤阵列板22、波长转换元件23及透镜24，其中，所述激光器阵列21用于支持多个激光器的光输出端或激光器的多个光输出端向侧发光光纤阵列板22中的侧发光光纤的光输入端输出激光。
本实施方式中，激光器阵列21发出的激光经侧发光光纤作用后，从所述侧发光光纤阵列板22发出的激光出射向波长转换元件23，经波长转换元件23的波长转换作用以后，转换形成的可见光在透镜24的光处理作用后出射出光源装置2。
参见图3，是图2中的侧发光光纤阵列板的一种具体结构的示意图，侧发光光纤阵列板呈方形状，包括A区域(第一区域)及B区域(第二区域)，所述A区域与所述B区域的区域交界线包括两段互为平行的横直段及位于两段横直段之间的倾斜段，从而使得所述A区域与所述B区域互补以形成呈方形状的所述侧发光光纤阵列板。
在A区域中设有一根第一侧发光光纤221，且第一侧发光光纤221与第一激光器211连接。在B区域中设有一根第二侧发光光纤222，且第二侧发光光纤222与第二激光器212连接。
本实施方式中，所述第一侧发光光纤221按S字型平面排布设于A区域中，所述第二侧发光光纤222按S字型平面排布设于B区域中。
可以理解的是，本实施方式中的S字型为呈反复回折方式所形成的平面排布图案。
可以理解的是，以所述第一侧发光光纤221的排布所形成的面光照射区域可与汽车前照灯标准要求的二十五米处测试光分布的近光光分布区域相对应。而以所述第一侧发光光纤221和第二侧发光光纤222的排布所共同形成的面光照射区域可与汽车前照灯的远光光分布区域相对应。
本实施方式中，第一激光器211和第二激光器212的位置相对设 置，而各个激光器连接的侧发光光纤的未回折段均相向延伸设置。
可以理解的是，所述第一激光器221和第二激光器212还可相互平行设置，而各个激光器连接的侧发光光纤的未回折段相互平行延伸设置。
本实施方式中，侧发光光纤反复回折的疏密程度可视具体的发光需求设置。
可以理解的是，A区域和B区域的面积可以相等。
本实施方式中，可通过控制各个激光器的发光强度实现自适应前照灯功能。具体地，可将图3中的侧发光光纤阵列板视为右前照灯中的结构。在前照灯处于非转向照射模式下，且处于近光灯照射模式下，可有预设控制策略：B区域中的第二激光器212关闭；调整所述第一侧发光光纤221所对应的第一激光器211的发光强度至第一亮度。而在前照灯处于转向照射模式下，且处于近光灯照射模式下，可有预设控制策略：B区域中的第二激光器212关闭；调整所述第一侧发光光纤221所对应的第一激光器211的发光强度至第二亮度，所述第二亮度大于所述第一亮度。
可以理解的是，第一激光器211的发光强度增强后，位于第一侧发光光纤221的末端(位于图中右侧)的发光强度随之增加，带来的效果包括可以照亮最右侧的前方区域，由此实现前照灯的自适应功能。
本实施方式中，还可将所述侧发光光纤阵列板及波长转换元件设置在一活动机构上，所述活动机构可在运输工具转向时，调整所述测发光光纤阵列板及所述波长转换元件所形成的可见光的照射方向，实现自适应前照灯功能。
参见图4，是图2中的侧发光光纤阵列板的另一种具体结构的示意图，侧发光光纤阵列板呈方形状，包括A区域(第一区域)和B区域(第二区域)，所述A区域与所述B区域的区域交界线包括两段互为平行的横直段及位于两段横直段之间的倾斜段，从而使得所述A区域与所述B区域互补以形成呈方形状的所述侧发光光纤阵列板。
在A区域中设有多根第一侧发光光纤221，各根第一侧发光光纤221与相应的第一激光器211连接。在B区域中同样设有多根第二侧发光光纤222，各根第二侧发光光纤222与相应的第二激光器212连接。
本实施方式中，所述第一侧发光光纤221的根数与所述第二侧发光光纤222的根数可以相同，各根第一侧发光光纤221和各根第二侧发光光纤222的位置相互对应设置。
本实施方式中，各根所述第一侧发光光纤221的末端可与相应的第二侧发光光纤222的末端相互靠近设置，而所述第一侧发光光纤221的光输入端与所述第二侧发光光纤222的光输入端则相互远离设置。
本实施方式中，所述第一侧发光光纤221和所述第二侧发光光纤222均按直线型方式在相应的区域中以平面展开形式排布设置。各根第一侧发光光纤221相互平行设置，而各根第二侧发光光纤222同样相互平行设置。
可以理解的是，前述的预设照射模式还可包括转向照射模式。
本实施方式中，在前照灯处于转向照射模式下，可根据预设控制策略调整相应根及相应根数的所述第一侧发光光纤221所对应的所述至少一激光器和/或相应根及相应根数的所述第二侧发光光纤222所对应的所述至少一激光器的开启或关闭。
可以理解的是，在一具体应用例中，在所述侧发光光纤阵列板应用于左前照灯时：
在非转向照射模式下(正向前行)，且处于近光灯照射模式下，预设控制策略可为：B区域中的各根第二侧发光光纤222所对应的第二激光器212均关闭，从图中由最左向右数的A区域四根第一侧发光光纤221所对应的第一激光器211均关闭，而A区域中的剩下的第一侧发光光纤221所对应的第一激光器211则均打开。此时，照射效果可为照亮前照灯的正前方(可将观图的视角视为由后往前看的视角)二十五米内的地面。
在转向照射模式下(向左转)，且处于近光灯照射模式下，预设控制策略可为：B区域中的各根第二侧发光光纤222所对应的第二激光器212均关闭，图A区域中的各根第一侧发光光纤221所对应的第一激光器211均打开，此时，由于A区域中的最左侧的四根第一侧发光光纤221所对应的第一激光器211均打开，使得照射效果可为照亮前照灯的正前方二十五米内的地面及前方左侧部分地面，从而实现自适应前照灯功能。
可以理解的是，由于不涉及活动部件，因此可降低实现自适应前照灯功能的机械结构的复杂程度，易于控制且结构稳定。
可以理解的是，在前照灯处于远光灯照射模式下时，可同时打开B区域中的各根第二侧发光光纤222所对应的第二激光器212均打开，A区域中的各根第一侧发光光纤221所对应的第一激光器211均打开。应当理解的是，对应前述的对激光器的发光强度的进行调节，此处在非转向照射模式下，于A区域中，其可使靠近左至右的各根第一激光器的发光强度依次递减；而在转向照射模式(向右转)，可使位于右侧的各根第一激光器的发光强度增大，从而可同样实现自适应前照灯功能。
参见图5，是图2中的波长转换元件的一种具体结构的示意图，波长转换元件23包括第一子波长转换元件231和第二子波长转换元件232，在所述第一子波长转换元件231和所述第二子波长转换元件232之间设有阻隔层233。
可以理解的是，设置的阻隔层233可有利于使照射图案具有清晰的近光截止线。
所述第一子波长转换元件231包括A`区域，该区域可与侧发光光纤阵列板的A区域相对应；所述第二子波长转换元件232包括B`区域，该区域可与侧发光光纤阵列板的B区域相对应。而所述阻隔层233则可与侧发光光纤阵列板的两区域的交界线相对应。
可以理解的是，所述A`区域还可与前照灯的近光分布区域相对应，所述A`区域和B`共同构成与前照灯的远光分布区域相对应的区 域。
本实施方式中，所述阻隔层233可包括光漫反射层或光吸收层，其中，在所述阻隔层233为光漫反射层时，其可为包括高反光铝及含有二氧化钛等散射粒子的材料层；在所述阻隔层233为光吸收层时，其可为包括炭黑等可吸收光的粒子的材料层。
参见图6，是本发明提供的前照灯处于非转向照射模式下的效果及对应结构示意图。本图包括图4中的侧发光光纤阵列板的结构，如图所示，汽车在非转向照射模式下，左、右前照灯均大致照向正前方，其中，右侧结构中的虚线框(位于中部)表示此时发光的第一侧发光光纤221的根数及位置，而位于侧发光光纤阵列板前侧的波长转换元件23则对其接收到的光进行转换。
参见图7，是本发明提供的前照灯处于转向模式照射下的效果及对应结构示意图。本图包括图4中的侧发光光纤阵列板的结构，如图所示，汽车在转向照射模式下(向左转向)，左、右前照灯均大致照射偏左向的前方，右侧结构的中的虚线框(位于左侧)表示此时发光的第一侧发光光纤221的根数及位置，而位于侧发光光纤阵列板前侧的波长转换元件23则对其接收到的光进行转换。较图6中的虚线框而言，发光的第一侧发光光纤221的左移，从而可以照射到汽车所转方向一侧的更多区域，有助于提升驾驶员在进行转弯驾驶时的视野安全。
参见图8，是本发明另一实施方式的光源装置的元件位置结构示意图。与前述实施方式的光源装置的不同之处在于，本实施方式的光源装置3还包括光扩散元件33。需要说明的是，在本发明的精神或基本特征的范围内，适用于前述实施方式中的各具体方案也可以相应的适用于本实施方式中，为节省篇幅及避免重复起见，在此就不再赘述。
所述光扩散元件33设于侧发光光纤阵列板32与波长转换元件34之间。激光器阵列用于支持激光器的光输出端向侧发光光纤阵列板32中的侧发光光纤的光输入端输出激光。
本实施方式中，激光器阵列31发出的激光经侧发光光纤作用后，从所述侧发光光纤阵列板32发出的激光出射向光扩散元件33，在光扩散元件33的作用下，使得出射至波长转换元件34的激光更加均匀。波长转换元件34对接收到的激光进行转换，转换后的可见光经透镜作用出射出光源装置3。
参见图9，是本发明又一实施方式的光源装置的元件位置结构示意图，与前述实施方式的光源装置的不同之处在于，本实施方式的光源装置4包括基底42，具体地，本实施方式的光源装置4的激光器阵列41用于支持激光器的光输出端向侧发光光纤阵列板43中的侧发光光纤的光输入端输出激光。
本实施方式中，侧发光光纤阵列板43设于所述基底42具有反射层的一侧上，从而侧发光光纤阵列板43出射的向基底42方向的出射光可经反射层的反射作用，将激光发射至波长转换元件44上。
本实施方式中，所述基底42的材料可为高热导率材料，如铝、铜和/或银等。
本实施方式中，在所述基底42上还可设有多个凹坑，且在多个凹坑中均设有所述反射层，以对凹坑接收到的激光进行反射。
可以理解的是，多个凹坑可呈S字型排布设置于所述基底42上。
可以理解的是，所述凹坑中的反射层可通过蒸镀的方式制备，而凹坑内壁的折射率优选控制在70％以上，以此提高正向上的出光效率，从而使得波长转换元件44可接收到更多的激光，进而可转换更多的激光。
本实施方式中，激光器阵列41发出的激光经侧发光光纤阵列板43中的侧发光光纤的发光作用，一部分激光被波长转换元件44直接接收；与此同时，基底42的反射层对接收到的激光进行反射，经反射后的激光向波长转换元件44传播，反射的激光被波长转换元件44接收。波长转换元件44对接收到的激光进行波长转换得到符合预期的可见光，该可见光经透镜45作用后出射出光源装置4。
参见图10，是本发明提供的一种汽车前照灯的结构示意图，汽 车前照灯5可包括前述的光源装置51，利用所述光源装置51，汽车前照灯5可实现远近光所对应的光源结构一体化的简单结构，且利用光源装置包括的控制元件可调整发光强度，可提高光源利用率，同时，控制元件控制相应激光器或激光器的光输出端的开关，可实现相应的近光灯照射模式和远光灯照射模式的切换，可满足汽车前照灯国家标准的光分布。与此同时，由于本发明提供的光源装置不涉及活动部件，因而实现前照灯光照的自适应功能所涉及的结构相对简单且易于控制。
本实施方式中，光源装置51的侧发光光纤阵列板可将激光器发出的高功率及高密度的点光源转换为功率密度较低的面光源，之后激光激发波长转换元件，可得到白光面光源，可避免在将激光作为激发光源时，激发光功率密度过高引起的波长转换层的转换效率降低的问题。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化涵括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。此外，显然“包括”一词不排除其他单元或步骤，单数不排除复数。系统、装置或终端装置权利要求中陈述的多个单元、模块或装置也可以由同一个单元、模块或装置通过软件或者硬件来实现。第一，第二等词语用来表示名称，而并不表示任何特定的顺序。
以上实施方式仅用以说明本发明的技术方案而非限制，尽管参照以上较佳实施方式对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或等同替换都不应脱离本发明技术方案的精神和范围。

Claims (15)

  1. 一种光源装置，应用于运输工具的前照灯上，其特征在于，包括：
    用于发出激光的至少一激光器，每一所述至少一激光器均具有至少一光输出端；
    侧发光光纤阵列板，包括至少两根侧发光光纤，每一根侧发光光纤的光输入端与相应的所述至少一激光器的一光输出端连接，其中：
    至少一根第一侧发光光纤按预设方式排布于所述侧发光光纤阵列板的第一区域；及
    至少一根第二侧发光光纤按预设方式排布于所述侧发光光纤阵列板的第二区域，所述第一区域与所述前照灯的近光光分布区域相对应，所述第一区域、所述第二区域与所述前照灯的远光光分布区域相对应；
    设于所述侧发光光纤阵列板靠近所述前照灯的光出射面的一侧的波长转换元件；
    控制元件，用于在预设照射模式下调整相应的激光器的开启和/或关闭。
  2. 如权利要求1所述的光源装置，其特征在于，所述在预设照射模式下调整相应的激光器的开启和/或关闭包括：
    在所述前照灯处于近光灯照射模式下，将与所述至少一根第一侧发光光纤的光输入端连接的相应的所述至少一激光器调整为开启状态，将与所述至少一根第二侧发光光纤的光输入端连接的相应的所述至少一激光器调整为关闭状态；
    在所述前照灯处于远光灯照射模式下，将与所述至少一根第一侧发光光纤的光输入端连接的相应的所述至少一激光器调整为开启状态，将与所述至少一根第二侧发光光纤的光输入端连接的相应的所述 至少一激光器调整为开启状态。
  3. 如权利要求1所述的光源装置，其特征在于，所述至少一根第一侧发光光纤包括一根第一侧发光光纤；所述至少一根第二侧发光光纤包括一根第二侧发光光纤，所述第一侧发光光纤按S字型平面排布设于所述第一区域、所述第二侧发光光纤按S字型平面排布设于所述第二区域。
  4. 如权利要求3所述的光源装置，其特征在于，所述在预设照射模式下调整相应的激光器的开启和/或关闭还包括：
    在所述前照灯处于转向照射模式下，根据预设控制策略调整所述第一侧发光光纤所对应的激光器的发光强度由第一亮度增强至第二亮度。
  5. 如权利要求1所述的光源装置，其特征在于，所述至少一根第一侧发光光纤包括多根第一侧发光光纤，所述至少一根第二侧发光光纤包括多根第二侧发光光纤，所述第一侧发光光纤的末端与所述第二侧发光光纤的末端相互靠近设置，所述第一侧发光光纤的光输入端与所述第二侧发光光纤的光输入端相互远离设置。
  6. 如权利要求5所述的光源装置，其特征在于，多根所述第一侧发光光纤及多根所述第二侧发光光纤均按直线型平面排布设置。
  7. 如权利要求5所述的光源装置，其特征在于，所述在预设照射模式下调整相应的激光器的开启和/或关闭还包括：
    在所述前照灯处于转向照射模式下，根据预设控制策略调整相应根及相应根数的所述第一侧发光光纤所对应的所述至少一激光器和/或相应根及相应根数的所述第二侧发光光纤所对应的所述至少一激光器的开启或关闭。
  8. 如权利要求1所述的光源装置，其特征在于，所述波长转换元件包括：
    与所述第一区域对应的第一子波长转换元件；
    与所述第二区域对应的第二子波长转换元件；及
    设于所述第一子波长转换元件和所述第二子波长转换元件之间的阻隔层。
  9. 如权利要求8所述的光源装置，其特征在于，所述阻隔层包括光漫反射层或光吸收层。
  10. 如权利要求1至9任一项所述的光源装置，其特征在于，还包括光扩散元件，所述光扩散元件设于所述侧发光光纤阵列板与所述波长转换元件之间。
  11. 如权利要求10所述的光源装置，其特征在于，还包括具备光反射层的基底，所述侧发光光纤阵列板设于所述基底具有反射层的一侧上。
  12. 如权利要求11所述的光源装置，其特征在于，所述基底上还设有多个凹坑，在所述多个凹坑中均设有所述反射层。
  13. 如权利要求11所述的光源装置，其特征在于，所述基底的材料为以下中的至少一种：铝、铜和银。
  14. 如权利要求10所述的光源装置，其特征在于，所述第一区域和所述第二区域的面积相等。
  15. 一种汽车前照灯，其特征在于，包括如权利要求1至14任一项所述的光源装置。
PCT/CN2018/118828 2018-05-16 2018-12-03 光源装置及汽车前照灯 WO2019218644A1 (zh)

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