CN219513510U - White light laser device - Google Patents

Abstract

The utility model discloses a white light laser device, and belongs to the technical field of lighting devices. The laser device comprises a shell, a laser element, a wavelength conversion element and a detector, wherein the laser element and the detector are arranged in the shell; the shell comprises a base plate, a surrounding dam and a cover plate, wherein the base plate and the cover plate are respectively connected to the two opposite ends of the surrounding dam, the base plate, the surrounding dam and the cover plate are enclosed to form a containing space for containing the laser element, and the laser element is arranged on the base plate; the laser emitted by the laser element irradiates the wavelength conversion element and excites fluorescence to form white light emission, at least part of the fluorescence is reflected to the detector, and the detector monitors the effectiveness of the conversion element through the reflected fluorescence. According to the laser device provided by the utility model, the detector is arranged in the shell, at least part of fluorescence is reflected to the detector, the detector can monitor the effectiveness of the wavelength conversion element through the reflected fluorescence, and the safety of the laser device is improved.

Description

White light laser device

Technical Field

The utility model relates to the technical field of lighting devices, in particular to a white light laser device.

Background

Compared with an LED light source, the white laser light source has the advantages of long irradiation distance, high brightness, high electro-optical conversion efficiency, long service life and the like, and is widely applied to illumination. The white light laser device generally uses blue light laser to excite fluorescent materials to realize wavelength conversion to generate white light, and the fluorescent materials are easy to generate thermal quenching failure under the condition of high laser power density or higher temperature, so that the blue light laser is directly emitted, a certain potential safety hazard exists, and the safety of the white light laser device is reduced. Therefore, how to improve the safety of the white laser device is a technical problem to be solved.

Disclosure of Invention

The utility model provides a white laser device, which can solve the problem of low safety of the white laser device.

In order to solve the technical problems, the utility model provides a laser device, which comprises a shell, a laser element, a wavelength conversion element and a detector, wherein the laser element and the detector are arranged in the shell; the shell comprises a base plate, a surrounding dam and a cover plate, wherein the base plate and the cover plate are respectively connected to the two opposite ends of the surrounding dam, the base plate, the surrounding dam and the cover plate are enclosed to form a containing space for containing the laser element, and the laser element is arranged on the base plate; the laser emitted by the laser element irradiates the wavelength conversion element and excites fluorescence to form white light emission, at least part of the fluorescence is reflected to the detector, and the detector monitors the effectiveness of the conversion element through the reflected fluorescence.

According to the laser device provided by the utility model, the detector is arranged in the shell, at least part of fluorescence is reflected to the detector, and the detector can monitor the effectiveness of the wavelength conversion element through the reflected fluorescence, so that the damage to a human body caused by direct laser emission after the wavelength conversion element fails is avoided, and the safety of the laser device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a laser device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an embodiment of the present utility model in which a sonde is mounted on a dam;

FIG. 3 is a schematic view of another embodiment of the probe provided by the present utility model disposed on a dam;

FIG. 4 is a schematic view of another embodiment of the probe provided by the present utility model disposed on a dam;

FIG. 5 is a schematic diagram of an embodiment of a detector filter and a detector heat sink according to the present utility model;

FIG. 6 is a schematic diagram of an embodiment of a laser device provided with a transmissive wavelength conversion element according to the present utility model;

FIG. 7 is a schematic view of an embodiment of a laser device provided by the present utility model with a mirror;

FIG. 8 is a schematic diagram of a laser device provided with a hemispherical lens according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of an embodiment of a laser device with multiple laser chips according to the present utility model;

fig. 10 is a schematic structural diagram of another embodiment of the laser device provided by the utility model, in which a plurality of laser chips are disposed.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present utility model, but do not limit the scope of the present utility model. Likewise, the following examples are only some, but not all, of the examples of the present utility model, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The terms "first," "second," "third," and the like in embodiments of the present utility model are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. The terms "comprising" and "having" and any variations thereof in embodiments of the present utility model are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The utility model provides a white laser device. Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser device according to an embodiment of the utility model. The white light laser device 100 may include a housing 10, a laser element 20, a wavelength conversion element 30, and a detector 40. Wherein the laser element 20 and the detector 40 are mounted within the housing 10. The housing 10 may include a base plate 11, a dam 12, and a cover plate 13, where the base plate 11 and the cover plate 13 are respectively connected to opposite ends of the dam 12, and the base plate 11, the dam 12, and the cover plate 13 enclose a receiving space 14 for receiving the laser element 20, and the laser element 20 is mounted on the base plate 11.

The laser light emitted from the laser element 20 may be irradiated to the wavelength conversion element 30 and excited to emit fluorescence, so as to form white light emission. Specifically, the laser light emitted from the laser element 20 may be blue light, and the blue light may be irradiated onto the wavelength conversion element 30 to excite yellow fluorescence, which may be mixed with part of the blue light directly passing through the wavelength conversion element 30 to form white light. Compared with the method for synthesizing white light by exciting red, green and blue three primary color fluorescent powder by adopting short wavelength laser, the stokes loss generated during light-light conversion is relatively less, and the laser device has better luminous efficiency.

If the wavelength conversion element 30 fails, the laser light is directly emitted, and the laser light may cause a certain damage to the human body, the external environment of the article, etc., resulting in a reduction in the safety of the laser device.

In order to overcome the above-mentioned drawbacks, the laser device 100 provided by the present utility model can reflect at least part of the fluorescence emitted by the laser element 20 exciting the wavelength conversion element 30 to the detector 40, and the detector 40 monitors the effectiveness of the wavelength conversion element 30 by the reflected fluorescence, so as to ensure the safe operation of the laser device 100. The detector 40 may be a photosensor that receives the fluorescence light, converts the light signal into an electrical signal, and determines whether the wavelength converting element 30 is active by monitoring the electrical signal. When the wavelength conversion element 30 fails or the conversion efficiency is too low, no fluorescence is reflected to the detector 40, or the fluorescence reflected to the detector 40 is less than the trigger value of the detector 40, the wavelength conversion element 30 can be determined to fail, and the detector 40 sends a prompt for replacing the wavelength conversion element 30 at this time, so as to ensure the safety of the laser device 100.

The detector 40 may be mounted on the substrate 11 as shown in fig. 1. The detector 40 may be attached to the substrate 11, for example, by a surface mount process, so that a considerable contact area is provided between the detector 40 and the substrate 11, and the heat generated on the detector 40 can be quickly conducted by using the substrate 11.

In some embodiments, the detector 40 is mounted on the dam 12, as shown in fig. 2-4, so as to reduce the space occupied by the substrate 11, facilitate the arrangement of other elements on the substrate 11, and facilitate the reduction of the volume of the laser device 100, thereby realizing the miniaturization of the laser device 100.

Specifically, in some embodiments, a step 121 is provided on the dam 12, and as shown in fig. 2 and 3, the probe 40 is mounted on the step 121. Step 121 may be a sidewall protruding from the dam 12, as shown in FIG. 2; the step 121 may be embedded in the side wall of the dam 12, as shown in fig. 3, and the probe 40 may be partially embedded or fully embedded in the side wall of the dam 12 after being installed, so as to reduce the occupation of the accommodating space 14.

The mounting manner of the detector 40 on the dam 12 may also have other forms, as shown in fig. 4, a groove 122 is provided on the dam 12, the detector 40 is mounted in the groove 122, and the detector 40 may be partially embedded or completely embedded in the groove 122, so as to reduce the occupation of the accommodating space 14 by the detector 40, and further reduce the volume of the laser device 100.

In order to avoid that the laser beam emitted from the laser element 20 affects the monitoring of the fluorescence by the detector 40, in an embodiment, as shown in fig. 5, a filter 41 is installed at one end of the detector 40 receiving the fluorescence, and the filter 41 can reflect the laser and transmit the fluorescence, so as to improve the accuracy of the monitoring result.

In order to avoid the monitoring result being affected by the excessive temperature of the detector 40, in one embodiment, as shown in fig. 5, the detector 40 is provided with a detector heat sink 42, the detector 40 is connected to the detector heat sink 42, and the detector heat sink 42 is used for heat dissipation of the detector 40.

With continued reference to fig. 1, the laser device 20 may include a laser chip 21 and a laser heat sink 22, the laser heat sink 22 is mounted on the substrate 11, the laser chip 21 is connected to the laser heat sink 22, and the laser heat sink 22 is used for dissipating heat of the laser device 20. The laser chip 21 generates a large amount of heat during operation, and the laser heat sink 22 is arranged to facilitate rapid heat dissipation of the laser element 20, thereby reducing the temperature of the laser element 20.

The wavelength conversion element 30 may include a fluorescent layer 31 and a fluorescent layer substrate 32 stacked on each other, and as shown in fig. 1, the laser light emitted from the laser element 20 irradiates the fluorescent layer 31 to excite fluorescence. When the fluorescent layer 31 fails or partially fails, the excited fluorescent light will decrease, and accordingly, the fluorescent light reflected to the detector 40 decreases, so that the effectiveness of the fluorescent layer 31 can be judged by the reflected fluorescent light received by the detector 40.

In one embodiment, the wavelength conversion element 30 is a reflective optical element, and as shown in fig. 1, the wavelength conversion element 30 is mounted on the substrate 11. The laser light emitted from the laser element 20 irradiates the wavelength conversion element 30 to form white light, and is reflected and emitted from the cover 13. Specifically, the height of the laser heat sink 22 may be set higher than the wavelength conversion element 30, the top surface of the laser heat sink 22 may be set to be a slope, and the laser chip 21 may be attached to the slope, so that the light emitted from the laser element 20 is obliquely incident on the wavelength conversion element 30. At this time, the detector 40 can receive the fluorescence emitted from the wavelength conversion element 30 and the fluorescence reflected by the cover 13, so as to monitor the effectiveness of the wavelength conversion element 30.

The wavelength conversion element 30 may also be a transmissive optical element, as shown in fig. 6, the wavelength conversion element 30 being mounted on the cover plate 13. The laser light emitted from the laser element 20 irradiates the wavelength conversion element 30 to form white light, and is transmitted and emitted from the cover 13. Specifically, the laser chip 21 may be disposed on a side of the laser heat sink 22 so that the outgoing light of the laser element 20 is incident upward to the wavelength conversion element 30. At this time, the detector 40 receives the fluorescence reflected by the cover 13, and monitoring of the effectiveness of the wavelength conversion element 30 is achieved. Since the detector 40 is mounted on the dam 12 and the wavelength conversion element 30 is mounted on the cover 13, the number of elements on the substrate 11 is further reduced, the space occupied by the substrate 11 can be reduced, and the size of the laser device 100 can be reduced.

The detector 40 provided by the utility model can be adapted to various white light laser devices, is suitable for various application scenes, for example, can be applied to a laser device provided with a light guide element or a plurality of laser elements, and can also be applied to a laser device provided with a plurality of laser elements and a light guide element, in the embodiments, the detector 40 is arranged on the base plate 11 or the surrounding dam 12, the detector 40 monitors the effectiveness of the wavelength conversion element 30, and the safety of the laser device is improved.

Specifically, in one embodiment, the laser device 100 is provided with a light guiding element 50, and as shown in fig. 7 and 8, the light guiding element 50 is used to change the propagation path of the light beam emitted from the laser element 20 so that the light beam irradiates the wavelength conversion element 30. By providing the light guiding element 50, the light beam can be emitted or incident to the wavelength converting element 30 in different forms, thereby meeting various use requirements. The light guiding element 50 may be a mirror, as shown in fig. 7, and the laser light emitted from the laser element 20 irradiates the wavelength conversion element 30 through the mirror to form white light, and is emitted from the cover 13. The light guiding element 50 may be a hemispherical lens, as shown in fig. 8, and the laser light emitted from the laser element 20 is converged by the hemispherical lens, and then irradiates the wavelength conversion element 30 after changing the optical path, so as to form white light, and is emitted from the cover plate 13.

The detector 40 provided by the present utility model is also applicable to a laser device including a plurality of laser chips 21. As shown in fig. 9 and 10, a plurality of laser chips 21 are mounted on different positions of the substrate 11, and the detector 40 is provided on the substrate 11 or the dam 12, so that the effectiveness of the wavelength conversion element 30 can be monitored. In fig. 9, the wavelength conversion element 30 is reflective and is provided on the substrate 11; in fig. 10, the wavelength conversion element 30 is transmissive, is disposed on the cover plate 13, and is provided with a light guiding element 50.

The laser device provided by the utility model has at least the following beneficial effects:

1. the laser device 100 provided by the utility model is provided with the detector 40, at least part of fluorescence emitted by the laser element 20 exciting the wavelength conversion element 30 can be reflected to the detector 40, the detector 40 monitors the effectiveness of the wavelength conversion element 30 through the reflected fluorescence, and the safety of the laser device 100 is improved.

2. The detector 40 is mounted on the dam 12, which can reduce the occupation of the space of the substrate 11, facilitate the arrangement of other elements on the substrate 11, and facilitate the reduction of the volume of the laser device 100, thereby realizing the miniaturization of the laser device 100.

3. The front end of the detector 40 is provided with the filter 41 and the detector heat sink 42, the filter 41 can reflect laser and transmit fluorescence, the detector heat sink 42 is beneficial to heat dissipation of the detector 40, and the influence of laser and high temperature on the monitoring result of the detector 40 can be reduced.

4. The wavelength conversion element 30 is a transmissive optical element, and the wavelength conversion element 30 is mounted on the cover plate 13, so that the number of elements on the substrate 11 is further reduced, which is beneficial to reducing the volume of the laser device 100.

5. The laser device 100 is provided with the light guiding element 50, so that light beams can be emitted in different forms, thereby meeting various use requirements.

The foregoing description is only a partial embodiment of the present utility model, and is not intended to limit the scope of the present utility model, and all equivalent devices or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (15)

1. A white light laser device, comprising:

a housing, a laser element, a wavelength conversion element, and a detector, the laser element and the detector being mounted within the housing;

the shell comprises a base plate, a surrounding dam and a cover plate, wherein the base plate and the cover plate are respectively connected to the two opposite ends of the surrounding dam, the base plate, the surrounding dam and the cover plate enclose to form a containing space for containing the laser element, and the laser element is arranged on the base plate;

the laser emitted by the laser element irradiates the wavelength conversion element and excites fluorescence to form white light emission, at least part of the fluorescence is reflected to the detector, and the detector monitors the effectiveness of the conversion element through the reflected fluorescence.

2. The white light laser device of claim 1, wherein the detector is mounted on the substrate.

3. The white light laser device of claim 1, wherein the detector is mounted on the dam.

4. A white light laser device as claimed in claim 3 wherein the dam is provided with a step on which the detector is mounted.

5. A white light laser device as claimed in claim 3 wherein the dam is provided with a recess in which the detector is mounted.

6. The white light laser device according to claim 1, wherein a filter is mounted at an end of the detector receiving the fluorescence, the filter reflecting the laser light and transmitting the fluorescence.

7. The white light laser device of claim 1, wherein the detector is provided with a detector heat sink, the detector being connected to the detector heat sink.

8. The white light laser device of claim 1, wherein the wavelength conversion element is a reflective optical element, the wavelength conversion element being mounted on the substrate.

9. The white light laser device according to claim 8, wherein the laser element includes a laser chip and a laser heat sink, the laser heat sink is mounted on the substrate, the laser heat sink is higher than the wavelength conversion element, a top surface thereof is provided as a slope, and the laser chip is attached to the slope so that light emitted from the laser element is obliquely incident on the wavelength conversion element.

10. The white light laser device of claim 1, wherein the wavelength conversion element is a transmissive optical element, and wherein the wavelength conversion element is mounted on the cover plate.

11. The white light laser device according to claim 10, wherein the laser element includes a laser chip and a laser heat sink, the laser heat sink being mounted on the substrate, the laser chip being disposed on a side of the laser heat sink so that the outgoing light of the laser element is incident upward on the wavelength conversion element.

12. The white light laser device according to claim 1, wherein the wavelength conversion element includes a phosphor layer and a phosphor layer substrate which are stacked, and wherein laser light emitted from the laser element irradiates the phosphor layer to excite fluorescence.

13. The white light laser apparatus according to claim 1, wherein the white light laser apparatus includes a light guiding element for changing a propagation path of a light beam emitted from the laser element so that the light beam is irradiated onto the wavelength conversion element.

14. The white light laser device of claim 13, wherein the light guiding element is a mirror or a hemispherical lens.

15. The white light laser device of claim 1, wherein the laser component comprises a plurality of laser chips, the plurality of laser chips being mounted at different locations on the substrate.