CN109854967B - Laser lighting module and vehicle - Google Patents
Laser lighting module and vehicle Download PDFInfo
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- CN109854967B CN109854967B CN201711244418.7A CN201711244418A CN109854967B CN 109854967 B CN109854967 B CN 109854967B CN 201711244418 A CN201711244418 A CN 201711244418A CN 109854967 B CN109854967 B CN 109854967B
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Abstract
The present disclosure provides a laser lighting module and a vehicle, the laser lighting module including: a laser light source for emitting laser light; the laser device comprises a shell, a laser source and a light source, wherein the shell is used for limiting a light propagation channel, laser light propagates from front to back along the light propagation channel, the laser source is fixed on the shell and is positioned at the front end of the light propagation channel, and the shell is provided with a window at the rear end of the light propagation channel; the light color converter is arranged in the light propagation channel and covers the window and is used for converting the laser into white light; the focusing lens is arranged in the light propagation channel so that all laser beams in the light propagation channel can be irradiated onto the light color converter; the temperature detection device is used for detecting the temperature change of the light color converter and sending out a safety signal; and the control device is electrically connected with the laser light source and the temperature detection device, receives the safety signal and powers off the laser light source according to the safety signal. The laser lighting module can improve the accuracy of laser leakage judgment.
Description
Technical Field
The present disclosure relates to the field of laser lighting technologies, and in particular, to a laser lighting module and a vehicle.
Background
With the development of light source technology, laser gradually enters the automobile market as a brand-new light source and is increasingly popular based on the high brightness of laser and the good collimation performance of the laser light source. At present, lamps which use laser as a light source to manufacture high beam and auxiliary high beam appear in the market. However, laser is used as a special light source, and the improper use of the laser can cause damage to pedestrians and drivers driving opposite.
In order to prevent laser leakage, a laser detection device is generally provided in the prior art. When laser leaks, part of blue laser passes through the crack and directly reaches the outer side (of the lighting module), so that the laser detection device arranged on the outer side can detect the laser, the existence of laser leakage is judged, and the laser light source is turned off. Therefore, the conventional laser detection device works on the principle of detecting whether laser exists in the external environment of the lighting module, and performing safety judgment according to the laser.
Therefore, the conventional laser detection device has a disadvantage that erroneous judgment or misjudgment is caused by failure of electronic devices or existence of laser in a use environment.
Disclosure of Invention
In view of the above, the present disclosure is directed to a laser illumination module to improve the accuracy of laser leakage determination.
In order to achieve the purpose, the technical scheme of the disclosure is realized as follows:
a laser lighting module, wherein the laser lighting module comprises:
a laser light source for emitting laser light; the laser device comprises a shell, a laser source and a light transmission channel, wherein the shell is used for limiting the light transmission channel, the laser light is transmitted from front to back along the light transmission channel, the laser source is fixed on the shell and is positioned at the front end of the light transmission channel, and the shell is provided with a window at the rear end of the light transmission channel; the light color converter is arranged in the light propagation channel and covers the window and is used for converting the laser into white light; the focusing lens is arranged in the light propagation channel so that all laser beams in the light propagation channel can be irradiated onto the light color converter; the temperature detection device is used for detecting the temperature change of the light color converter and sending out a safety signal; and the control device is electrically connected with the laser light source and the temperature detection device, receives the safety signal and powers off the laser light source according to the safety signal.
Further, the temperature detection device is configured as a plurality of thermistors, the plurality of thermistors are arranged in a circular array around the central point of the window, and each thermistor is fixed on the outer side of the shell at the window through a respective connecting piece; the connecting piece is made of a phase-change heat-conducting insulating material.
Further, the light color converter is made of yellow or yellow-green glass or ceramic materials, the laser lighting module further comprises an annular conductive wire, the conductive wire is fixed to the shell at the window through a support, the conductive wire is electrically connected with the control device through a conducting wire, and when the conductive wire is cut off due to the fact that the light color converter is broken, the control device controls the laser light source to be powered off.
Further, the photochromic converter is made of yellow or yellow-green glass or ceramic material, the laser lighting module further comprises a light barrier, the bottom end of the light barrier is hinged to the housing through a pivot shaft, the light barrier is provided with a light-shielding position, the upper end of the light barrier is supported on the outer surface of the photochromic converter through a support rod at the light-shielding position, and the light barrier is set as: when the light color converter is broken, the support rod enters the light ray transmission channel, so that the light barrier can rotate around the pivot shaft from the light shading position to the light blocking position to cover the window; the end face of the bottom end abuts against the rear end face of the shell, the light barrier is arranged to abut against the end face of the bottom end and the rear end face, and the light barrier is limited to rotate from the light shielding position towards the direction far away from the light shielding position.
Further, the light barrier is provided in plurality, and the plurality of light barriers are arranged around the central circular array of the window.
Furthermore, the control device comprises a printed circuit board, the laser light source is a laser diode, and the laser diode is provided with a pin for inserting into the printed circuit board to realize the electrical connection with the control device.
Further, the casing includes front end portion, rear end portion and mid portion, the front end portion is connected the front end of mid portion, the rear end portion is connected the rear end of mid portion, the mid portion has well cavity, well cavity is injectd the light propagation passageway, the front end portion structure is the mount pad of laser light source, the rear end portion structure is for sealing the end cover of light propagation passageway, the window is seted up on the end cover, photochromic converter is in the inboard of end cover is fixed in the end cover.
Further, the rear end of the shell is provided with a light hole, an inner hole opening of the light hole is used as the window, and the hole wall of the light hole is in a horn shape expanding from inside to outside.
Further, the laser lighting module is used for a lighting lamp or a car lamp.
Compared with the prior art, the laser lighting module disclosed by the disclosure has the following advantages:
the laser light emitted by the laser light source is transmitted from back to front along the light transmission channel in the shell, the light color conversion is carried out when the laser light reaches the light color converter, the blue light is converted into white light to be emitted, and heat is generated during the light color conversion, so that the temperature of the light color converter is increased. Under the condition that laser does not leak, laser light rays emitted by the laser light source are all irradiated onto the light color converter through the focusing lens, in this case, the temperature value raised by the light color converter is a constant value, and when the difference value between the actual temperature value and the constant value of the light color converter is detected by the detection device and analyzed by the control device to be within a preset range, no laser leakage can be judged; and under the condition that the laser leaks, the laser irradiated on the light color converter is reduced, so that the temperature value raised by the light color converter is smaller than a constant value, and the difference value between the actual temperature value of the light color converter and the constant paper piece is larger than the preset range, thereby judging that the laser leaks, and further powering off the laser light source through the control device, so that the damage caused by the laser leakage is avoided, and the purpose of safe use is achieved. Through the technical scheme, the laser lighting module provided by the disclosure judges whether laser leakage exists or not by detecting whether laser light emitted by the laser light source completely passes through the light color converter, and compared with a mode of judging whether laser leakage exists or not by detecting whether laser exists in an external environment, the laser lighting module is more accurate and more beneficial to improving safety.
Another object of the present disclosure is to provide a vehicle to improve the safety of the lighting of the lamp.
In order to achieve the purpose, the technical scheme of the disclosure is realized as follows:
a vehicle comprising a vehicle lamp, wherein the vehicle lamp comprises a laser lighting module provided by the present disclosure.
The vehicle and the laser lighting module have the same advantages compared with the prior art, and the detailed description is omitted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure. In the drawings:
fig. 1 is a perspective view of a laser lighting module according to an embodiment of the present disclosure;
fig. 2 is a cross-sectional view of a laser lighting module according to an embodiment of the present disclosure.
Description of reference numerals:
1-laser light source, 11 pins, 20-light propagation channel, 21-front end part, 22-rear end part, 23-middle part, 24-window, 240-hole wall, 3-light color converter, 4-thermistor, 41-first lead, 5-control device, 6-connecting piece, 7-conductive wire, 70-bracket, 71-second lead, 8-light barrier, 81-pivot shaft, 82-support rod and 9-focusing lens.
Detailed Description
It should be noted that, in the present disclosure, the embodiments and features of the embodiments may be combined with each other without conflict.
In addition, the terms inside and outside of the directional terms mentioned in the embodiments of the present disclosure mean inside and outside with respect to the outline of the component itself. It is to be understood by persons skilled in the art that the foregoing directional terms are used only for the purposes of explanation and illustration of the present disclosure, and are not limiting.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
According to a specific embodiment of the present disclosure, there is provided a laser lighting module including: a laser light source 1 for emitting laser light; the laser light source 1 is fixed on the shell and positioned at the front end of the light propagation channel 20, and the shell is provided with a window 24 at the rear end of the light propagation channel 20; a light color converter 3 disposed in the light propagation channel 20 and covering the window 24 for converting the laser light into white light; a focusing lens 9 (e.g., a biconvex lens) disposed in the light propagation channel 20 to allow the laser beam in the light propagation channel 20 to be fully irradiated onto the photochromic converter 3; the temperature detection device is used for detecting the temperature change of the light color converter 3 and sending out a safety signal; and the control device 5, the laser light source 1 and the temperature detection device are both electrically connected with the control device 5, and the control device 5 receives the safety signal and powers off the laser light source 1 according to the safety signal.
The laser light emitted by the laser light source 1 propagates along the light propagation channel 20 in the housing from the back to the front, and when reaching the light color converter 3, the light color conversion occurs, and the blue light is converted into white light to be emitted, and heat is generated during the light color conversion, so that the temperature of the light color converter is increased. Under the condition that laser does not leak, laser light emitted by the laser light source 1 is completely irradiated onto the light color converter 3 through the focusing lens 9, in this case, the temperature value raised by the light color converter 3 is a constant value, and when the difference value between the actual temperature value and the constant value of the light color converter 3 is detected by the temperature detection device and analyzed by the control device to be within a preset range, no laser leakage can be judged; and under the condition that the laser leaks, because the laser irradiated on the light color converter 3 is reduced, the temperature value raised by the light color converter 3 is smaller than a constant value, and therefore the difference value between the actual temperature value of the light color converter 3 and the constant paper piece is larger than the preset range, the laser leakage is judged to exist, and the laser light source is powered off through the control device 5, so that the damage caused by the laser leakage is avoided, and the purpose of safe use is achieved. Through the technical scheme, the laser lighting module provided by the disclosure judges whether laser leakage exists or not by detecting whether all laser light rays emitted by the laser light source 1 pass through the light color converter 3, and compared with a mode of judging whether laser leakage exists or not by detecting whether laser exists in an external environment, the laser lighting module is more accurate and more beneficial to improving safety.
In the specific embodiments provided by the present disclosure, the temperature detection device may be configured in any suitable manner. Alternatively, referring to fig. 1, the temperature detecting means is configured as a thermistor 4, the thermistor 4 is electrically connected to the control means 5 through a first wire 41, and since the resistance value of the thermistor 4 varies with the temperature, the control means 5 can analyze whether there is laser leakage according to the resistance value of the thermistor 4. To avoid contingency, the thermistor 4 may be provided in a plurality (for example four as shown in fig. 1), a plurality of the thermistors 4 being arranged in a circular array around the centre point of the window 24, each thermistor 4 being fixed to the outside of the housing at the window 24 by a respective connecting piece 6. The rear end of the housing (i.e., the rear end portion 22) may be made of a material with good thermal conductivity, so that the heat generated by the photochromic converter 3 can be rapidly transferred to the thermistor 4.
The connecting piece 6 can be made of a phase-change heat-conducting insulating material, so that a contact surface which is more attached to the thermistor 4 and the shell is formed, the thermal resistance is reduced to a greater extent, and more thorough heat transfer between the thermistor and the shell is realized.
In the specific embodiment provided by the present disclosure, the light color converter 3 is made of a glass or ceramic material of yellow or yellow-green color.
In order to avoid the risk of laser leakage caused by the breakage of the photochromic converter 3 even when the laser leakage cannot be detected by sensing the temperature of the photochromic converter 3 due to the influence of the working environment or the failure of the temperature detecting device, the laser lighting module may further include an annular conductive filament 7, as shown in fig. 1 and 2, the conductive filament 7 is fixed to the housing at the window 24 through a bracket 70, the conductive filament 7 is electrically connected to the control device 5 through a second wire 71 (for reducing the number of components, the second wire 71 may be connected to the first wire 41), and when the conductive filament 7 is broken due to the breakage of the photochromic converter 3, the control device 5 controls the laser light source 1 to be powered off, thereby further avoiding the risk of laser leakage.
In addition, in order to avoid the risk that the light color converter 3 is broken before the laser lighting module is powered on and laser light leaks out once the laser lighting module is powered on, the laser lighting module may further include a light barrier 8, as shown in fig. 1, a bottom end of the light barrier 8 is hinged to the housing through a pivot shaft 81, the light barrier 8 has a light shielding position, in the light shielding position, an upper end of the light barrier 8 is supported on an outer surface of the light color converter 3 through a support rod 82, and the light barrier 8 is configured to: when the photochromic converter 3 is broken, the supporting rod 82 enters the light transmission channel 20, so that the light blocking plate 8 can rotate around the pivot shaft 81 from the light shielding position to the light blocking position to cover the window 24, thereby preventing the laser from directly leaking under the condition that the photochromic converter 3 is broken first and the laser light source 1 is powered on later.
Referring to fig. 2, the end surface of the bottom end abuts against the rear end surface of the housing, and the light barrier 8 is configured to limit the light barrier 8 to rotate from the light shielding position toward the direction away from the light shielding position by abutting against the end surface of the bottom end and the rear end surface.
In addition, in order to prevent the light-blocking panel 8 from being unable to rotate from the light-blocking position toward the light-blocking position under its own weight due to the problem of the installation angle, the light-blocking panel 8 may be provided in plural numbers (e.g., four as shown in fig. 1), a plurality of the light-blocking panels 8 being arranged around the central circular array of the window 24.
In the specific embodiment provided by the present disclosure, the control device 5 may include a printed circuit board, and the laser light source 1 may be a laser diode, and the laser diode is provided with a pin 11 for being inserted into the printed circuit board to realize an electrical connection with the control device 5.
In the specific embodiment provided in the present disclosure, in order to facilitate the installation of the laser light source 1 and the fixation of the photochromic converter 3, the housing may include a front portion 21, a rear portion 22 and a middle portion 23, the front portion 21 is connected to the front end of the middle portion 23, the rear portion 22 is connected to the rear end of the middle portion 23, the middle portion 23 has a hollow cavity, the hollow cavity defines the light propagation channel 20, the front portion 21 is configured as a mounting seat of the laser light source 1, the rear portion 22 is configured as an end cap for closing the light propagation channel 20, the window 24 is opened on the end cap, and the photochromic converter 3 is fixed to the end cap at the inner side of the end cap.
In addition, in order to avoid that the external surface of the light color converter 3 at the window 24 is directly exposed to contact with foreign matters to reduce light transmittance, the rear end of the housing (specifically, the rear end portion 22) may be opened with a light hole, an inner aperture of the light hole serves as the window 24, and a hole wall 240 of the light hole is configured in a horn shape expanding from inside to outside, as shown in fig. 2. Wherein, since the thickness of the case at the hole wall 240 is relatively small and the thermal resistance is small, the thermistor 4 can be fixed on the hole wall 240, as shown in fig. 1.
In addition, the laser lighting module provided by the present disclosure may be used for a lighting lamp or a car lamp.
On the basis of the technical scheme, the present disclosure further provides a vehicle, which includes a vehicle lamp, wherein the vehicle lamp includes the laser lighting module provided by the present disclosure. The vehicular lamp may be used as a high beam or a low beam, for example.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (10)
1. A laser lighting module, characterized in that the laser lighting module comprises:
a laser light source (1) that emits laser light;
the laser device comprises a shell, a laser light source and a light transmission channel (20), wherein the shell defines the light transmission channel (20), the laser light is transmitted from front to back along the light transmission channel (20), the laser light source (1) is fixed on the shell and is positioned at the front end of the light transmission channel (20), and the shell is provided with a window (24) at the rear end of the light transmission channel (20);
a light color converter (3) disposed in the light propagation channel (20) and covering the window (24) for converting the laser light into white light;
the focusing lens (9) is arranged in the light propagation channel (20) so that the laser beams in the light propagation channel (20) can be completely irradiated onto the light color converter (3);
the temperature detection device is used for detecting the temperature change of the light color converter (3) and sending out a safety signal; and the number of the first and second groups,
the control device (5), the laser light source (1) and the temperature detection device are both electrically connected with the control device (5), and the control device (5) receives the safety signal and cuts off the power of the laser light source (1) according to the safety signal.
2. The laser lighting module according to claim 1, characterized in that the temperature detection means is configured as a thermistor (4), the thermistor (4) being provided in a plurality, the plurality of thermistors (4) being arranged in a circular array around a central point of the window (24), each thermistor (4) being fixed to the outside of the housing at the window (24) by a respective connecting piece (6);
the connecting piece (6) is made of a phase-change heat-conducting insulating material.
3. The laser lighting module according to claim 1, wherein the photochromic converter (3) is made of a yellow or yellowish green glass or ceramic material, the laser lighting module further comprising a ring-shaped conductive filament (7), the conductive filament (7) being fixed to the housing at the window (24) by a bracket (70), the conductive filament (7) being electrically connected to the control device (5) by a wire, the control device (5) controlling the laser light source (1) to be powered off when the conductive filament (7) is interrupted by the photochromic converter (3) being broken.
4. The laser lighting module of claim 1, wherein the photochromic converter (3) is made of yellow or yellow-green glass or ceramic material, the laser lighting module further comprising a light barrier (8), a bottom end of the light barrier (8) is hinged to the housing by a pivot shaft (81), the light barrier (8) has a light-shielding position in which an upper end of the light barrier (8) is supported on an outer surface of the photochromic converter (3) by a support rod (82), the light barrier (8) is configured to: when the light color converter (3) is broken, the support rod (82) enters the light transmission channel (20), so that the light barrier (8) can rotate around the pivot shaft (81) from the light shielding position to cover the window (24);
the end face of the bottom end abuts against the rear end face of the shell, the light barrier (8) is arranged to abut against the end face of the bottom end and the rear end face, and the light barrier (8) is limited to rotate from the light shielding position towards the direction far away from the light shielding position.
5. The laser lighting module according to claim 4, characterized in that the light barrier (8) is provided in plurality, a plurality of the light barriers (8) being arranged around a central circular array of the windows (24).
6. Laser lighting module according to claim 1, characterized in that the control device (5) comprises a printed circuit board, the laser light source (1) being a laser diode provided with pins for insertion into the printed circuit board for electrical connection with the control device (5).
7. The laser lighting module according to claim 1, wherein the housing comprises a front portion (21), a rear portion (22) and a middle portion (23), the front portion (21) being connected to a front end of the middle portion (23), the rear portion (22) being connected to a rear end of the middle portion (23), the middle portion (23) having a hollow cavity defining the light propagation channel (20), the front portion (21) being configured as a mounting seat for the laser light source (1), the rear portion (22) being configured as an end cap closing the light propagation channel (20), the window (24) opening onto the end cap, the light color converter (3) being fixed to the end cap inside the end cap.
8. The laser lighting module according to claim 1, wherein the rear end of the housing is provided with an optical hole, an inner aperture of the optical hole is used as the window (24), and a hole wall (240) of the optical hole is configured to be flared from inside to outside.
9. The laser lighting module of any one of claims 1-8, wherein the laser lighting module is used for a light or a vehicle light.
10. A vehicle comprising a vehicle lamp, characterized in that the vehicle lamp comprises a laser lighting module according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244418.7A CN109854967B (en) | 2017-11-30 | 2017-11-30 | Laser lighting module and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244418.7A CN109854967B (en) | 2017-11-30 | 2017-11-30 | Laser lighting module and vehicle |
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| Publication Number | Publication Date |
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| CN109854967A CN109854967A (en) | 2019-06-07 |
| CN109854967B true CN109854967B (en) | 2020-08-14 |
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| CN201711244418.7A Active CN109854967B (en) | 2017-11-30 | 2017-11-30 | Laser lighting module and vehicle |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012220476B3 (en) * | 2012-11-09 | 2013-12-05 | Automotive Lighting Reutlingen Gmbh | Illumination device for motor vehicle, has temperature-measurement device performing contactless temperature measurement of photo luminescence element such that reference temperature of illumination device is measurable |
| CN104061466A (en) * | 2013-03-18 | 2014-09-24 | 晶元光电股份有限公司 | Light-emitting diode bulb |
| CN104221232A (en) * | 2012-04-19 | 2014-12-17 | 优志旺电机株式会社 | Laser light source apparatus, and method for controlling temperature of wavelength conversion element in laser light source apparatus |
-
2017
- 2017-11-30 CN CN201711244418.7A patent/CN109854967B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104221232A (en) * | 2012-04-19 | 2014-12-17 | 优志旺电机株式会社 | Laser light source apparatus, and method for controlling temperature of wavelength conversion element in laser light source apparatus |
| DE102012220476B3 (en) * | 2012-11-09 | 2013-12-05 | Automotive Lighting Reutlingen Gmbh | Illumination device for motor vehicle, has temperature-measurement device performing contactless temperature measurement of photo luminescence element such that reference temperature of illumination device is measurable |
| CN104061466A (en) * | 2013-03-18 | 2014-09-24 | 晶元光电股份有限公司 | Light-emitting diode bulb |
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| CN109854967A (en) | 2019-06-07 |
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