Laser vehicle lamp

Abstract

The invention discloses a laser car lamp which comprises a low beam module, a high beam module, a fluorescent light emitting part, a polarization reflector and a projection lens part, the low beam module comprises a low beam laser device group and a scanning micro-mirror group, the low beam laser device group comprises a plurality of low beam laser devices used for emitting low beam laser beams, and the scanning micro-mirror group is used for scanning and deflecting the low beam laser beams; the high-beam module comprises a high-beam laser used for emitting a high-beam laser beam, the fluorescent light emitting part and the polarization reflector are arranged on the emitting path of the low-beam laser beam and the emitting path of the high-beam laser beam, and the fluorescent light emitting part is used for converting the low-beam laser beam and the high-beam laser beam into low-beam non-polarized light and high-beam non-polarized light; the polarizing reflector is used for reflecting the low-beam laser beam and the high-beam laser beam and transmitting the low-beam non-polarized light and the high-beam non-polarized light; and the projection lens part is arranged on a fluorescent light emitting path and is used for shaping the low-beam laser beam and the high-beam laser beam and shaping and projecting low-beam non-polarized light and high-beam non-polarized light, the laser car lamp is small in size, and the illumination brightness of the low beam and the high beam is sufficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting, in particular to a laser vehicle lamp. BACKGROUND

[0002] Motor vehicle headlamps are an important guarantee for night driving safety. Currently, there are four main types of light sources for motor vehicle headlamps on the market: xenon lamps, LED lamps, and laser lamps. Laser lamps have the advantages of small size, long service life, high contrast, and low energy consumption compared to other light sources. With the increasing maturity of laser-related technologies, the cost of laser lamps is also decreasing, and more and more manufacturers are beginning to use laser lamps for motor vehicle headlamps.

[0003] Motor vehicle headlamps include low-beam and high-beam lamps. One existing solution is to use LED light sources for low-beam lamps and laser light sources for high-beam lamps. However, under the same brightness requirement, LED light sources need to be arranged in an array using multiple LEDs, and the low-beam and high-beam lamps each use independent light paths, resulting in a large vehicle lamp size and increasing the difficulty of vehicle layout design. As an alternative, laser projection vehicle lamps are beginning to emerge in the trend of intelligentization. However, current projection vehicle lamps typically use only one set of laser light sources to achieve low-beam and high-beam switching by controlling the deflection position of the scanning mirror. This approach has the disadvantage of insufficient illumination brightness in high-beam mode, which is not conducive to driving safety. SUMMARY

[0004] To overcome the above-mentioned shortcomings, the purpose of the present application is to provide a laser vehicle lamp that not only has a small size and occupies less space, but also has good illumination performance for both low-beam and high-beam, sufficient illumination brightness, and reduced safety hazards.

[0005] To achieve the above-mentioned purposes, the present application adopts the following technical solutions:

[0006] A laser vehicle lamp, comprising:

[0007] A low-beam module, including a low-beam laser group and a scanning micromirror group, the low-beam laser group including a plurality of low-beam lasers for emitting low-beam laser beams, and the scanning micromirror group being disposed on the outgoing path of the low-beam laser beams for scanning and deflecting the low-beam laser beams;

[0008] A high-beam module, including at least one high-beam laser for emitting high-beam laser beams, the low-beam laser beams and the high-beam laser beams both being linearly polarized;

[0009] A fluorescent exit portion disposed on the outgoing path of the low-beam laser beams and the high-beam laser beams for converting the low-beam laser beams and the high-beam laser beams into low-beam unpolarized light and high-beam unpolarized light, respectively;

[0010] a polarizing reflector, disposed on the emission paths of the low-beam laser beam and the high-beam laser beam, for reflecting the low-beam laser beam and the high-beam laser beam and transmitting the low-beam non-polarized light and the high-beam non-polarized light;

[0011] The projection lens portion is arranged on the fluorescence emission path, and is used for shaping the low-beam laser beam and the high-beam laser beam, and shaping and projecting the low-beam non-polarized light and the high-beam non-polarized light.

[0012] In this embodiment, the low-beam laser beams emitted by the plurality of low-beam lasers are irradiated onto the scanning micromirror assembly at different angles.

[0013] In this embodiment, the low beam unpolarized light includes low beam fluorescent light, and the high beam unpolarized light includes high beam fluorescent light.

[0014] In this embodiment, the low beam unpolarized light further includes a low beam unpolarized laser beam, and the high beam unpolarized light further includes a high beam unpolarized laser beam.

[0015] In this embodiment, the low beam module further includes:

[0016] A low-beam collimating lens group is arranged between the low-beam laser group and the scanning micromirror group;

[0017] The low beam collimating lens group includes a plurality of low beam collimating lenses, the number of the plurality of low beam collimating lenses is the same as the number of the low beam lasers and corresponds one to one, each of the low beam collimating lenses includes a low beam fast axis collimating lens and a low beam slow axis collimating lens, and the low beam collimating lens is used to shrink the fast axis and slow axis divergence angles of the low beam laser beam.

[0018] In this embodiment, the low beam module further includes:

[0019] The field mirror lens group is arranged between the scanning micromirror group and the polarizing reflector, and is used to converge the angles of the multiple laser beams after deflection scanning to the polarizing reflector.

[0020] In this embodiment, the low beam module further includes:

[0021] A first reflector is provided on the emission path of one of the low-beam laser beams and is used to reflect one of the low-beam laser beams to the scanning micromirror assembly;

[0022] The second reflecting mirror is arranged between the scanning micromirror group and the field lens group, and is used to reflect the multiple low-beam laser beams after deflection scanning to the field lens group.

[0023] In this embodiment, the high-beam collimating lens is arranged on the emission path of the high-beam laser beam;

[0024] The high-beam collimating lens comprises a high-beam fast-axis collimating lens and a high-beam slow-axis collimating lens, and the high-beam collimating lens is used to shrink the fast-axis and slow-axis divergence angles of the high-beam laser beam.

[0025] In this embodiment, the high beam module also includes

[0026] The third reflector is arranged on the emission path of the high-beam laser beam and is used to reflect the high-beam laser beam to the polarization reflector.

[0027] In this embodiment, the projection lens unit includes:

[0028] The first lens group is used to shape the low beam laser beam and the high beam laser beam to the fluorescent light emitting portion, and to shape the low beam non-polarized light and the high beam non-polarized light to the polarizing reflector.

[0029] The second lens group is used for shaping and projecting the low beam non-polarized light and the high beam non-polarized light to form an illumination area.

[0030] Beneficial effects

[0031] The laser headlights in this application are not only small in size and take up little space, but also have excellent lighting performance in both low and high beams, with sufficient lighting brightness, reducing safety hazards;

[0032] Laser headlights have independent light source modules in low beam lighting mode and high beam mode respectively. The high beam laser beam emitted by the high beam module is directly projected onto the polarizing reflector and enters the subsequent lighting light path without being reflected by the scanning micromirror group. As a result, the high beam laser can always be in a normally-on state. There is no state where the high beam laser is turned off when the scanning micromirror group is retracing, which can significantly increase the brightness of the high beam lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are intended to facilitate understanding of the technical solutions of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure and do not constitute a limitation of the technical solutions of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual scale and are intended only to illustrate the contents of this application.

[0034] Figure 1 A schematic diagram of the structure of a laser headlight provided in an embodiment of the present application;

[0035] Figure 2 This is a front view of the laser headlight provided in an embodiment of the present application;

[0036] Figure 3 A side view of the laser headlight provided in an embodiment of the present application;

[0037] Figure 4The shape of the low beam laser beam and the high beam laser beam on the fluorescent ceramic sheet when the scanning micromirror group is not working in the implementation of the present application;

[0038] Figure 5 The simulation effect diagram of the low beam laser beam and the high beam laser beam on the fluorescent ceramic sheet when the scanning micromirror group is not working in the implementation of the present application;

[0039] Figure 6 The lighted area formed by the low beam laser beam and the high beam laser beam on the fluorescent ceramic sheet when the scanning micromirror group is working in the implementation of the present application. DETAILED DESCRIPTION

[0040] The above solutions are further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate but not to limit the scope of the present application. The implementation conditions used in the examples can be further adjusted as the specific manufacturer's conditions, and the implementation conditions not mentioned are usually the conditions in the conventional experiments.

[0041] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure shall have the ordinary meaning understood by a person of ordinary skill in the art to which the present application pertains. The terms "first", "second", and similar terms used in the embodiments of the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different constituent parts. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this document, "electrically connected" includes the case where the constituent elements are connected together through an element having a certain electrical effect. The element having a certain electrical effect is not particularly limited as long as it can perform the transmission of electrical signals between the constituent elements to be connected. The element having a certain electrical effect may, for example, be an electrode or a wiring, or a switching element such as a transistor, or another functional element such as a resistor, an inductor, or a capacitor, etc. "Up", "down", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0042] In the present application, the terms "up", "down", "inner", "middle", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements, or constituent parts to have a particular orientation, or to be constructed and operated in a particular orientation.

[0043] The present application discloses a laser headlight, which includes a low-beam module, a high-beam module, a fluorescent emission part, a polarizing reflector and a projection lens part. The low-beam module includes a low-beam laser group and a scanning micromirror group. The low-beam laser group includes multiple lasers. The multiple low-beam lasers are used to emit low-beam laser beams. The scanning micromirror group is arranged on the emission path of the low-beam laser beam and is used to scan and deflect the low-beam laser beam; the high-beam module includes at least one high-beam laser. The high-beam laser is used to emit a high-beam laser beam. Both the low-beam laser beam and the high-beam laser beam are in a linear polarization state; the fluorescent emission part is arranged on the emission paths of the low-beam laser beam and the high-beam laser beam, and is used to convert the low-beam laser beam and the high-beam laser beam into low-beam non-polarized light and high-beam non-polarized light respectively; the polarizing reflector is arranged on the emission paths of the low-beam laser beam and the high-beam laser beam, and the polarizing reflector is used to The laser headlights are used to reflect low-beam laser beams and high-beam laser beams, and transmit low-beam non-polarized light and high-beam non-polarized light; the projection lens portion is arranged on the fluorescent emission path, and the projection lens portion is used to shape the low-beam laser beam and the high-beam laser beam, and shape and project low-beam non-polarized light and high-beam non-polarized light. The laser headlights in this application are not only small in size and take up little space, but also have excellent lighting performance for both low and high beams, with sufficient lighting brightness, reducing safety hazards; the laser headlights have independent light source modules in low-beam lighting mode and high-beam mode respectively, and the high-beam laser beam emitted by the high-beam module is directly projected onto the polarizing reflector and enters the subsequent lighting light path without being reflected by the scanning micromirror group, so that the high-beam laser can be in a normally-on state all the time, and there is no state where the high-beam laser is turned off when the scanning micromirror group is retraced, which can significantly increase the high-beam lighting brightness.

[0044] Next join Figures 1-6 To describe a laser headlight provided in an embodiment of the present application, the laser headlight is not only small in size but also has sufficient brightness for both low and high beams;

[0045] The laser headlight includes a low beam module 10, a high beam module 20, a polarizing reflector 30, a projection lens portion 40, and a fluorescent light emitting portion 50;

[0046] The low-beam module 10 includes a low-beam laser group 11 and a scanning micromirror group 12. The low-beam laser group 11 includes multiple low-beam lasers for emitting low-beam laser beams. The scanning micromirror group 12 is arranged on the emission path of the low-beam laser beam and is used to scan and deflect the low-beam laser beam.

[0047] The high beam module 20 includes at least one high beam laser 21, which is used to emit a high beam laser beam, and both the low beam laser beam and the high beam laser beam are in a linear polarization state;

[0048] The fluorescent light emitting portion 50 is provided on the emission paths of the low-beam laser beam and the high-beam laser beam, and is used to convert the low-beam laser beam and the high-beam laser beam into low-beam unpolarized light and high-beam unpolarized light respectively;

[0049] The polarizing reflector 30 is arranged on the emission path of the low-beam laser beam and the high-beam laser beam. The polarizing reflector 30 is used to reflect the low-beam laser beam and the high-beam laser beam and transmit the low-beam non-polarized light and the high-beam non-polarized light.

[0050] The projection lens portion 40 is disposed on the fluorescence emission path and is used to shape the low-beam laser beam and the high-beam laser beam, and to shape and project the low-beam unpolarized light and the high-beam unpolarized light.

[0051] It should be noted that the low-beam laser and the high-beam laser 21 in the present application have the same structure, and the emitted low-beam laser beam and high-beam laser beam are both linearly polarized, blue in color, and have a wavelength range of 400nm-460nm.

[0052] In a specific embodiment, the fluorescent emitting portion 50 is preferably a fluorescent ceramic piece, which converts the low-beam laser beam and the high-beam laser beam into low-beam unpolarized light and high-beam unpolarized light, respectively.

[0053] In this embodiment, the scanning micromirror assembly 12 includes a MEMS galvanometer mirror and a control device, and the control device is used to control the MEMS galvanometer mirror to reciprocate along the fast axis and / or slow axis of the MEMS galvanometer mirror.

[0054] refer to Figure 2 and Figure 3 In this embodiment, the low-beam module 10 further includes a low-beam collimating lens group 13 and a field lens group 14. The low-beam collimating lens group 13 is disposed between the low-beam laser group 11 and the scanning micromirror group 12. The low-beam collimating lens group 13 includes multiple low-beam collimating lenses. The number of low-beam collimating lenses is the same as the number of low-beam lasers and corresponds one-to-one. Each low-beam collimating lens includes a low-beam fast-axis collimating lens and a low-beam slow-axis collimating lens. The low-beam collimating lens is used to reduce the fast-axis and slow-axis divergence angles of the low-beam laser beam. Each low-beam laser emits a low-beam laser beam toward the corresponding low-beam fast-axis collimating lens and low-beam slow-axis collimating lens, thereby reducing the cross-sectional aspect ratio of the low-beam laser beam emitted from the low-beam fast-axis collimating lens and the low-beam slow-axis collimating lens. The field lens group 14 is disposed between the scanning micromirror group 12 and the polarizing reflector 30, and is used to converge the angles of the multiple low-beam laser beams after deflection scanning toward the polarizing reflector 30.

[0055] Specifically, the low-beam laser group 11 in the present application includes two low-beam lasers, namely a first low-beam laser 111 and a second low-beam laser 112, and correspondingly, the low-beam collimating lens group 13 includes two low-beam collimating lenses, namely a first low-beam fast-axis collimating lens 131 and a first low-beam slow-axis collimating lens 133 corresponding to the first low-beam laser 111, and a second low-beam fast-axis collimating lens 132 and a second low-beam slow-axis collimating lens 134 corresponding to the second low-beam laser 112.

[0056] Reference Figure 2 and Figure 3 In the embodiment, the low beam module further comprises a first reflector 151 and a second reflector 152, the first reflector 151 is arranged on the exit path of one of the low beam laser beams, and is used for reflecting one of the low beam laser beams to the scanning micromirror group 12; specifically, the first reflector 151 is arranged between one of the low beam collimating lenses and the scanning micromirror group 12, and the second reflector 152 is arranged between the scanning micromirror group 12 and the field lens group 14, and is used for reflecting the multiple low beam laser beams after deflection scanning to the field lens group 14. In the embodiment, the optical path deflection of the low beam laser beams is realized by arranging the first reflector 151 and the second reflector 152, so as to reduce the optical path structure of the low beam module.

[0057] Specifically, the first low beam laser beam emitted by the first laser 111 is collimated by the first low beam fast-axis collimating lens 131 and the first low beam slow-axis collimating lens 133, and then exits to the first reflector 151. The first reflector 151 reflects the collimated first low beam laser beam to the scanning micromirror group 12. The second low beam laser beam emitted by the second laser 112 is collimated by the second low beam fast-axis collimating lens 132 and the second low beam slow-axis collimating lens 134, and then exits to the scanning micromirror group 12. The scanning micromirror group 12 deflects the received first low beam laser beam and second low beam laser beam to the second reflector 152. The second reflector 152 reflects the deflected first low beam laser beam and second low beam laser beam to the field lens group 14. The field lens group 14 converges the reflected first low beam laser beam and second low beam laser beam, and then emits them to the polarization reflector 30. The polarization reflector 30 reflects the first low beam laser beam and the second low beam laser beam to the projection lens part 40.

[0058] Reference Figure 2 and Figure 3 In the embodiment, the high beam module further comprises a high beam collimating lens 22, which is arranged on the exit path of the high beam laser beam, and is used for reducing the fast-axis and slow-axis divergence angles of the high beam laser beam; the high beam collimating lens 22 comprises a high beam fast-axis collimating lens 221 and a high beam slow-axis collimating lens 222. The high beam laser 21 emits the high beam laser beam to the high beam fast-axis collimating lens 221 and the high beam slow-axis collimating lens 222, so that the aspect ratio of the cross section of the high beam laser beam emitted from the high beam fast-axis collimating lens 221 and the high beam slow-axis collimating lens 222 is reduced.

[0059] Reference Figure 2 and Figure 3In this embodiment, the high beam module also includes a third reflector 23, which is arranged on the exit path of the high beam laser beam and is used to reflect the high beam laser beam to the polarizing reflector 30. Specifically, the third reflector 23 is arranged between the high beam collimating lens 22 and the polarizing reflector 30. The high beam laser beam emitted by the high beam laser 21 is collimated by the high beam collimating lens 22 and then emitted to the third reflector 23. The third reflector 23 then deflects and reflects the collimated high beam laser beam to the polarizing reflector 30. In this embodiment, the deflection of the optical path of the high beam laser beam is achieved by setting the third reflector 23, which can reduce the optical path structure of the high beam module 20 and meet the requirements of the optical path structure layout of the high beam module 20.

[0060] refer to Figure 2 In this embodiment, the projection lens portion 40 includes a first lens group 41 and a second lens group 42 in sequence along the emission path of the low beam non-polarized light and the high beam non-polarized light, wherein the first lens group 41 is used to shape the low beam laser beam and the high beam laser beam to the fluorescent emission portion, and shape the low beam non-polarized light and the high beam non-polarized light to the polarizing reflector 30, and the second lens group 42 is used to shape the projected low beam non-polarized light and the high beam non-polarized light to form an illumination area.

[0061] In this embodiment, the low beam non-polarized light includes low beam fluorescence, and the fluorescent ceramic piece converts most of the low beam laser beam into low beam fluorescence. Since the low beam fluorescence is in a non-polarized state, the low beam fluorescence can enter the second lens group 42 through the polarizing reflector 30 after being shaped by the first lens group 41. Furthermore, the low beam non-polarized light also includes a low beam non-polarized laser beam. After the low beam laser beam is incident on the fluorescent ceramic piece, a part of the low beam laser beam is not converted into low beam fluorescence, but is converted into a low beam non-polarized laser beam and emitted to the first lens group 41. Since the low beam non-polarized laser beam is in a non-polarized state, the low beam non-polarized laser beam shaped and emitted by the first lens group 41 can also enter the second lens group 42 through the polarizing reflector 30. The second lens group 42 will mix and shape the low beam fluorescence and the low beam non-polarized laser beam and then project them to form a low beam lighting area. This design is conducive to enhancing the lighting brightness of the low beam lighting area.

[0062] The high beam non-polarized light includes the high beam fluorescence. The fluorescent ceramic piece converts most of the high beam laser beam into the high beam fluorescence. Since the high beam fluorescence is in a non-polarized state, the high beam fluorescence can pass through the polarizing reflector 30 to enter the second lens group 42 after being shaped by the first lens group 41. Furthermore, the high beam non-polarized light also includes the high beam non-polarized laser beam. After the high beam laser beam is incident on the fluorescent ceramic piece, a part of the high beam laser beam is not converted into the high beam fluorescence, but is converted into a high beam non-polarized laser beam and emitted to the first lens group 41. Since the high beam non-polarized laser beam is in a non-polarized state, the high beam non-polarized laser beam shaped and emitted by the first lens group 41 can also pass through the polarizing reflector 30 to enter the second lens group 42. The second lens group 42 will mix and shape the high beam fluorescence and the high beam non-polarized laser beam and then project them to form a high beam lighting area. This design is conducive to enhancing the lighting brightness of the high beam lighting area.

[0063] Specifically, the colors of the low beam fluorescent light and the high beam fluorescent light are both white, and the colors of the low beam non-polarized laser beam and the high beam non-polarized laser beam are both blue. In the low beam lighting mode, the white low beam fluorescent light and the blue low beam non-polarized laser beam can pass through the polarizing reflector 30 at the same time, and the second lens group mixes, shapes and projects the white low beam fluorescent light and the blue low beam non-polarized laser beam, which can enhance the brightness of the low beam lighting. In the high beam lighting mode, the white high beam fluorescent light and the blue high beam non-polarized laser beam can pass through the polarizing reflector 30 at the same time, and the second lens group mixes, shapes and projects the white high beam fluorescent light and the blue high beam non-polarized laser beam, which can enhance the brightness of the high beam lighting.

[0064] refer to Figure 4 and Figure 5 In this embodiment, the low-beam laser beams emitted by the plurality of low-beam lasers are irradiated to the scanning micromirror group 12 at different angles, that is, the first laser 111 and the second laser 112 are irradiated to the scanning micromirror group 12 at different angles. When the scanning micromirror group 12 is not working, that is, when the control device does not control the deflection of the MEMS galvanometer, the first low-beam laser beam and the second low-beam laser beam are respectively scanned by the scanning micromirror group to the fluorescent ceramic piece. The initial light spots of the first low-beam laser beam and the second low-beam laser beam are respectively distributed on both sides of the middle of the fluorescent ceramic piece (such as Figure 4 shown).

[0065] Continue to refer Figure 4 and Figure 5 In this embodiment, the high-beam laser beam emitted by the high-beam laser 21 is collimated by the high-beam fast-axis collimating lens 221 and the high-beam slow-axis collimating lens 222, and then directly emitted to the polarizing reflector 30. The polarizing reflector 30 reflects the high-beam laser beam to the first lens group. The first lens group shapes the cross-section of the high-beam laser beam into an elliptical shape and projects it onto the fluorescent ceramic piece. The initial spot of the high-beam laser beam on the fluorescent ceramic piece is located at a position slightly above the middle (such as Figure 4As shown in the figure, when the scanning micromirror group 12 is working, it is divided into a scanning phase and a retrace phase. In the scanning phase, the laser beam is scanned and deflected. In the retrace phase, the mirror needs to be closed and there should be no laser beam irradiating the scanning micromirror group 12. The high beam laser beam in the embodiment is directly projected to the polarizing mirror 30 after being collimated and will not be reflected by the scanning micromirror group 12. Therefore, the high beam laser 21 can be set to an always-on state in the high beam illumination mode, and there is no state in which the high beam laser 21 is closed when the scanning micromirror group 12 is retraceing, which can significantly increase the brightness of the high beam ground illumination.

[0066] Reference Figure 6 When the scanning micromirror group is working, that is, when the control device controls the MEMS galvanometer to reciprocally deflect along the fast axis and / or the slow axis of the MEMS galvanometer, the first low beam laser beam and the second low beam laser beam are respectively scanned and deflected by the scanning micromirror group to the fluorescent ceramic sheet. The first low beam laser beam and the second low beam laser beam form a lighted area on the fluorescent ceramic sheet after being scanned and reflected by the MEMS galvanometer, wherein the lighted area includes a first area (LD1 area) corresponding to the first low beam laser beam and a second area (LD2 area) corresponding to the second low beam laser beam. Preferably, in the illumination distance direction (vertical direction in the figure), the first area (LD1 area) is slightly shorter than the second area (LD2 area), which can avoid the left low beam of the vehicle irradiating the driver's seat of the oncoming vehicle when the vehicle is approaching the oncoming vehicle. Further, the first area and the second area have an overlapping area (S area) in the middle of the fluorescent ceramic sheet. The overlapping area is located in the lower middle of the fluorescent ceramic sheet. The high beam laser beam reflected by the polarizing mirror forms an elliptical third area (LD3 area) on the fluorescent ceramic sheet, wherein the third area partially overlaps with the overlapping area and is located above the overlapping area. The low beam non-polarized light generated by the overlapping area (S area) has the maximum brightness in the low beam illumination area formed after passing through the first lens group, the polarizing mirror and the second lens group. The high beam non-polarized light generated by the elliptical third area (LD3 area) forms a high beam illumination area after passing through the first lens group, the polarizing mirror and the second lens group.

[0067] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification made in the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A laser headlight, characterized in that: include: A low-beam module, comprising a low-beam laser group and a scanning micromirror group, wherein the low-beam laser group comprises a plurality of low-beam lasers for emitting a low-beam laser beam, and the scanning micromirror group is arranged on an exit path of the low-beam laser beam and is used to scan and deflect the low-beam laser beam; A high-beam module, comprising at least one high-beam laser, wherein the high-beam laser is configured to emit a high-beam laser beam, wherein both the low-beam laser beam and the high-beam laser beam are in a linearly polarized state; a fluorescent light emitting portion, provided on the emission paths of the low-beam laser beam and the high-beam laser beam, for converting the low-beam laser beam and the high-beam laser beam into low-beam unpolarized light and high-beam unpolarized light, respectively; a polarizing reflector, disposed on the emission paths of the low-beam laser beam and the high-beam laser beam, for reflecting the low-beam laser beam and the high-beam laser beam and transmitting the low-beam non-polarized light and the high-beam non-polarized light; The projection lens portion is arranged on the fluorescence emission path, and is used for shaping the low-beam laser beam and the high-beam laser beam, and shaping and projecting the low-beam non-polarized light and the high-beam non-polarized light.

2. The laser headlight according to claim 1, characterized in that The low-beam laser beams emitted by the plurality of low-beam lasers are respectively irradiated to the scanning micromirror assembly at different angles.

3. The laser headlight according to claim 1, characterized in that: The low beam unpolarized light includes a low beam fluorescent light, and the high beam unpolarized light includes a high beam fluorescent light.

4. The laser headlight according to claim 3, characterized in that: The low beam non-polarized light further includes a low beam non-polarized laser beam, and the high beam non-polarized light further includes a high beam non-polarized laser beam.

5. The laser headlight according to claim 1, characterized in that: The low beam module also includes: A low-beam collimating lens group is arranged between the low-beam laser group and the scanning micromirror group; The low beam collimating lens group includes a plurality of low beam collimating lenses, the number of the plurality of low beam collimating lenses is the same as the number of the low beam lasers and corresponds one to one, each of the low beam collimating lenses includes a low beam fast axis collimating lens and a low beam slow axis collimating lens, and the low beam collimating lens is used to shrink the fast axis and slow axis divergence angles of the low beam laser beam.

6. The laser headlight according to claim 1, characterized in that: The low beam module also includes: The field mirror lens group is arranged between the scanning micromirror group and the polarizing reflector, and is used to converge the angles of the multiple laser beams after deflection scanning to the polarizing reflector.

7. The laser headlight according to claim 5, characterized in that: The low beam module also includes: A first reflector is provided on the emission path of one of the low-beam laser beams and is used to reflect one of the low-beam laser beams to the scanning micromirror assembly; The second reflecting mirror is arranged between the scanning micromirror group and the field lens group, and is used to reflect the multiple low-beam laser beams after deflection scanning to the field lens group.

8. The laser headlight according to claim 1, characterized in that: a high-beam collimating lens, arranged on an exit path of the high-beam laser beam; The high-beam collimating lens comprises a high-beam fast-axis collimating lens and a high-beam slow-axis collimating lens, and the high-beam collimating lens is used to shrink the fast-axis and slow-axis divergence angles of the high-beam laser beam.

9. The laser headlight according to claim 1, characterized in that: The high beam module also includes The third reflector is arranged on the emission path of the high-beam laser beam and is used to reflect the high-beam laser beam to the polarization reflector.

10. The laser headlight according to claim 1, characterized in that: The projection lens unit includes: The first lens group is used to shape the low beam laser beam and the high beam laser beam to the fluorescent light emitting portion, and to shape the low beam non-polarized light and the high beam non-polarized light to the polarizing reflector. The second lens group is used for shaping and projecting the low beam non-polarized light and the high beam non-polarized light to form an illumination area.

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