WO2021121111A1 - Light source device - Google Patents

Abstract

A light source device (100), comprising a light source (10), a wavelength conversion device (20), a light collection element (30), a support (50), and a scattering element (40). The light source (10) emits exciting light; the wavelength conversion device (20) receives the exciting light and converts at least part of the exciting light into excited light; the light collection element (30) is disposed between the light source and the wavelength conversion device (20), the light collection element (30) is provided with a light transmitting portion (33), the exciting light enters the wavelength conversion device (20) through the light transmitting portion (33), and the light collection element (30) is used for collecting the light exiting from the wavelength conversion device (20) and guiding to light to exit; the scattering element (40) is fixed to the light collection element (30) by means of the support (50) and corresponds to the light transmitting portion (33), and/or the scattering element (40) is installed, by means of the support (50), on the optical path of the light exiting from the light collection element (30) to scatter the exciting light entering the wavelength conversion device (20) and/or scatter the light exiting from the light collection element (30). Thus, the uniformity of an illumination beam emitted by the light source device (100) is improved.

Description

Light source device Technical field

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

Background technique

In the field of lighting, light source devices are used to emit light beams to provide lighting effects required by users. In order to obtain higher brightness and longer projection distance, lasers are usually used as the light source. The laser excitation wavelength conversion device emits the received laser, and the received laser combines with the remaining laser to synthesize white light, which is collected and homogenized by a square rod, and then projected to the outside. Form the required beam. However, the uniformity of the projected light beam emitted by the existing light source device is poor, which affects the lighting effect.

Utility model content

The utility model proposes a light source device to solve the above problems.

The utility model provides a light source device. The light source device includes a light source, a wavelength conversion device, a light collecting element, a scattering element and a bracket. The light source is used for emitting excitation light, and the wavelength conversion device is used for receiving the excitation light and converting at least part of the excitation light. In order to receive laser light, the light collection element is arranged between the light source and the wavelength conversion device. The light collection element is provided with a light-passing part. The excitation light emitted by the light source passes through the light-passing part and enters the wavelength conversion device. The light collection element is used to collect the wavelength conversion. The device emits light and guides it to exit, the scattering element is fixed to the light collection element through the bracket and corresponds to the light-passing part, and/or the scattering element is installed on the optical path of the light emitted by the light collection element through the bracket, so as to oppose the wavelength The excitation light of the conversion device is scattered and/or the light emitted from the light collection element is scattered.

In some embodiments, the bracket is connected to the side of the light collection element facing the wavelength conversion device, and the scattering element and the wavelength conversion device are located on the same side of the light collection element.

In some embodiments, the bracket is provided with a light channel, the light channel penetrates the bracket and extends along the light path of the excitation light, the bracket penetrates the light-passing part, and both ends of the bracket are respectively connected to the light collecting element and the scattering element.

In some embodiments, the bracket includes a first seat body, a connecting body, and a second seat body that are connected in sequence, the connecting body encloses a light channel, the connecting body passes through the light-passing part, the first seat body is connected to the scattering element, and the first seat body is connected to the scattering element. The two seat bodies are arranged on the light collecting element.

In some embodiments, the first seat body includes a side wall, the side wall encloses an accommodating groove, the accommodating groove communicates with the light channel, and the scattering element is disposed in the accommodating groove.

In some embodiments, the light collection element includes a first surface and a second surface. The first surface faces the light source and the second surface faces the wavelength conversion device. The surface is connected with the first surface.

In some embodiments, the bonding surface is provided with a glue storage groove, which is concave with respect to the second seat body and is arranged around the connecting body. The glue storage groove is used to contain the adhesive to bond the second seat body and the first seat body. surface.

In some embodiments, the scattering element is installed on the light path of the light emitted from the light collecting element through a bracket, and the light source device further includes a light homogenizing element arranged between the light collecting element and the scattering element, and the light homogenizing element is used to align the light collecting element. The emitted light is homogenized.

In some embodiments, the light source device further includes a housing, and the bracket includes a connected third seat body and a support seat, the third seat body is connected to the scattering element, and the support seat is connected to the housing on the light output side of the homogenizing element.

In some embodiments, the light homogenizing element is provided with scattering particles, and the scattering particles are used to scatter the light beam passing through the light homogenizing element.

In some embodiments, the light collecting element is a curved reflector, and the central axis of the light-passing portion is different from the central axis of the light collecting element.

The utility model provides a light source device, which includes a light source, a wavelength conversion device, a light collection element, a support and a scattering element. The light source emits excitation light, and the wavelength conversion device receives the excitation light and converts at least part of the excitation light into laser light. The light collection element Set between the light source and the wavelength conversion device, the light collection element is provided with a light-passing part, and the excitation light passes through the light-passing part and enters the wavelength conversion device. The light collection element is used to collect the light emitted by the wavelength conversion device and guide it to emit and scatter. The element is fixed to the light collecting element through a bracket and corresponds to the light-transmitting part, and/or the scattering element is installed on the optical path of the light emitted by the light collecting element through the bracket to scatter and/or the excitation light directed to the wavelength conversion device The light emitted from the light collecting element is scattered, thereby improving the uniformity of the illumination beam emitted by the light source device and improving the lighting effect of the light source device. In addition, the light source device of the present invention also fixes the scattering element through the bracket, so that the positions of the scattering element and the excitation light emitted by the light source and/or the light emitted by the homogenizing element are relatively unchanged, and the scattering element is not easy to deviate due to collision and vibration. It is beneficial for the scattering element to stably scatter the excitation light emitted by the light source and/or the light emitted by the homogenizing element, which can further improve the lighting effect of the light source device.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, for those skilled in the art, without creative work, other drawings can be obtained from these drawings.

Fig. 1 is a schematic structural diagram of a light source device provided by an embodiment of the present invention.

Fig. 2 is a schematic diagram showing the structure of the light source device bracket connected with the light collecting element and the scattering element respectively according to the embodiment of the present invention.

FIG. 3 is a schematic view of another view of the structure of the light source device bracket provided by the embodiment of the present invention connected with the light collecting element and the scattering element, respectively.

Fig. 4 is a schematic diagram of the structure of the bracket of the light source device provided by the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a light source device provided by another embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a light source device provided by another embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a light source device provided by an embodiment of the present invention without a scattering element on the light output side of the light homogenizing element.

8 to 11 are schematic diagrams of simulations of light spots obtained by the light source device of FIG. 7.

FIG. 12 is a schematic structural diagram of a light source device provided by an embodiment of the present invention with a scattering element provided on the light output side of the light homogenizing element.

13 to 15 are schematic diagrams of simulations of light spots obtained by the light source device of FIG. 12.

16 shows the relationship between the diffusion angle of the scattering element on the light exit side of the light homogenizing element of the light source device according to the embodiment of the present invention and the angular distribution lattice spacing of the light exit surface of the light homogenizing element.

FIG. 17 is a schematic diagram of the structure of a light homogenizing element of a light source device provided by an embodiment of the present invention.

18 is a schematic diagram of the structure of a light homogenizing element of a light source device provided by another embodiment of the present invention.

19 is a schematic diagram of the structure of a light homogenizing element of a light source device provided by another embodiment of the present invention.

Fig. 20 is a schematic structural diagram of a light source device provided by another embodiment of the present invention.

Fig. 21 is a schematic diagram of a scene of a light source device provided by an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present utility model.

1, an embodiment of the present invention provides a light source device 100. The light source device 100 includes a light source 10, a wavelength conversion device 20, a light collecting element 30, a scattering element 40, and a bracket 50. The light source 10 is used to emit excitation light. The wavelength conversion device 20 is used to receive the excitation light and convert at least part of the excitation light into a received laser light. The light collection element 30 is disposed between the light source 10 and the wavelength conversion device 20. The light collecting element 30 is provided with a light-passing portion 33, the excitation light emitted from the light source 10 passes through the light-passing portion and enters the wavelength conversion device 20. The light collecting element 30 collects the light emitted by the wavelength conversion device 20 and guides it to exit. The scattering element 40 can be fixed to the light collecting element 30 by the bracket 50 and corresponding to the light transmitting portion 33, and scatter the excitation light directed to the wavelength conversion device 20, so that the excitation light is scattered by the scattering element 40 and then incident to the wavelength conversion device. 20; the scattering element 40 can also be installed on the optical path of the light emitted by the light collecting element 30 through the bracket 50 to scatter the light emitted from the light collecting element 30.

Specifically, the light source 10 may be a laser diode (Laser Diode) or a light emitting diode (Light Emitting Diode). The excitation light emitted by the light source 10 may be blue light, violet light, ultraviolet light or other types of light. In this embodiment, the light source 10 includes a blue semiconductor laser diode, and the light source 10 emits blue laser light as excitation light.

The wavelength conversion device 20 is provided with a wavelength conversion material layer (not shown) to convert the excitation light into the received laser light, wherein the excitation light, the wavelength conversion material layer and the received laser light are relative concepts. Excitation light means light that can excite the wavelength conversion material layer so that the wavelength conversion material generates light of different wavelengths. The laser light refers to the light generated by the excitation light of the wavelength conversion material layer. For example, blue light excites the yellow light conversion material layer to generate yellow light. At this time, the blue light is the excitation light, and the yellow light is the received laser light. The wavelength conversion device 20 at least partially converts the received excitation light into the received laser light, which means that the wavelength conversion device 20 can convert all the received excitation light into the received laser light, or it can convert part of the received excitation light into the received laser light. By laser. For example, the wavelength conversion device 20 converts a part of the received excitation light into a received laser light, and the unconverted excitation light and the received laser light are mixed and then emitted from the wavelength conversion device 20.

The light collecting element 30 includes a first surface 31 and a second surface 32, and the first surface 31 faces the light source 10. The second surface 32 is opposite to the first surface 31, the second surface 32 faces the wavelength conversion device 20, and the light transmitting portion 33 penetrates the first surface 31 and the second surface 32. The light collecting element 30 has a reflecting surface, and the light collecting element 30 receives the light emitted by the wavelength conversion device 20 through the reflecting surface, and guides it out. The light collection element 30 may also be provided with a film layer, such as a reflective film, to increase the reflectivity of the light emitted by the wavelength conversion device 20 and reduce the light loss of the light source device 100.

The scattering element 40 may be a transmissive scattering element 40, the surface of the scattering element 40 may be uneven, or scattering particles are distributed inside the scattering element 40, or the refractive index distribution of the scattering element 40 is not uniform, so that the light is scattered. Scattering occurs when element 40 occurs.

In one embodiment, the scattering element 40 is fixed to the light collecting element 30 by the bracket 50 and corresponds to the light-passing portion 33 so that the excitation light is scattered by the scattering element 40 and then incident to the wavelength conversion device 20.

In the light source device 100 provided by the embodiment of the present invention, the scattering element 40 is arranged in the light path of the excitation light emitted by the light source 10, and before the excitation light reaches the wavelength conversion device 20, the excitation light is scattered, so as to make the light power of the excitation light The excitation light with uniform density distribution and uniform optical power density distribution is irradiated on the wavelength conversion device 20. A part of the excitation light is converted into the received laser by the wavelength conversion device 20. The received laser emitted by the wavelength conversion device 20 is Lambertian distributed, and the other part is not. The converted excitation light is reflected and scattered by the wavelength conversion device 20, and the unconverted excitation light emitted from the wavelength conversion device 20 is uniformly distributed in the center area and the edge area of the light spot, and the unconverted excitation light emitted from the wavelength conversion device 20 The divergence angle of the excitation light is equivalent to the divergence angle of the received laser light emitted by the wavelength conversion device 20, so that the received laser light and the unconverted excitation light are uniformly mixed, thereby improving the uniformity of the illumination beam emitted by the light source device and improving the lighting effect of the light source device . On the other hand, the excitation light with a uniform optical power density distribution is irradiated on the wavelength conversion device 20, which can reduce the optical power density of the central area of the excitation light spot irradiated on the wavelength conversion device 20, so that the excitation light is concentrated on the wavelength conversion device 20. The energy density is uniformly distributed, thereby reducing the heat generated by the wavelength conversion device 20 and improving the light conversion efficiency and light utilization rate, thereby helping to improve the lighting effect of the light source device 100. In addition, in this embodiment, the scattering element 40 and the light collecting element 30 are connected through the bracket 50, and the scattering element 40 is opposed to the light transmitting portion 33. Since the positions of the scattering element 40 and the light collecting element 30 are relatively unchanged, the scattering element 40 is not easy to The deviation from the light-transmitting portion 33 due to the impact and vibration facilitates the scattering element 40 to stably scatter the excitation light emitted by the light source 10, and can further improve the lighting effect of the light source device 100.

In some embodiments, the wavelength conversion device 20 is further provided with a heat dissipation device (not shown), such as a heat dissipation fin, for heat dissipation. The heat dissipation device can be arranged on the side of the wavelength conversion device 20 that faces away from the light source 10. In this way, the wavelength conversion device 20 uses the heat dissipation device to export excess heat to the surrounding environment, so that the temperature of the wavelength conversion material layer is not excessively increased and affected The light conversion efficiency of the wavelength conversion device 20.

The bracket 50 can be connected to the side of the light collecting element 30 facing the light source 10. At this time, the scattering element 40 and the light source 10 are located on the same side of the light collecting element 30. The bracket 50 can also be connected to a side of the light collecting element 30 facing the wavelength conversion device 20. On the other hand, at this time, the scattering element 40 and the wavelength conversion device 20 are located on the same side of the light collecting element 30, and the specific setting position of the scattering element 40 can be selected according to the structure of the light collecting element 30 and the structure of the bracket 50. For example, referring to Figures 2 and 3, the light collecting element 30 is a curved reflector. Specifically, the light collecting element 30 is in the shape of a hemispherical shell or a semi-elliptical spherical shell, the first surface 31 is convex, the second surface 32 is concave, and the scattering element 40 is built into the second surface 32 side. The scattering element 40 is arranged on the side of the first surface 31, which can prevent the scattering element 40 from occupying too much space of the light source device 100, which is beneficial to promote the miniaturization of the light source device 100. Since the scattering element 40 is connected to the light collecting element 30 through the bracket 50, if the scattering element 40 is built into the side of the second surface 32, the bracket 50 will inevitably extend into the side of the second surface 32 and block a part of the output of the wavelength conversion device 20. For light, when the structural volume of the support 50 is relatively large, the scattering element 40 can be arranged on the side of the first surface 31 so that the support 50 is also located on the side of the first surface 31 without blocking the light emitted by the wavelength conversion device 20.

The central axis 34 of the light collecting element 30 is different from the central axis 330 of the light transmitting portion 33. Specifically, the central axis 34 of the light collecting element 30 passes through the spherical center of the light collecting element 30, while the central axis 330 of the light-passing portion 33 does not pass through the spherical center of the light collecting element 30. This is beneficial to shorten the light source 10 and the light collecting element 30. The distance along the direction of the central axis 34 of the light collecting element 30 is thereby beneficial to promote the miniaturization of the light source device 100.

4, in this embodiment, the support 50 is provided with a light channel 51, the light channel 51 penetrates the support 50 and extends along the light path of the excitation light, the support 50 penetrates the light-transmitting portion 33, and both ends of the support 50 are connected to The light collecting element 30 and the scattering element 40 are connected.

Specifically, the bracket 50, the light collecting element 30, and the scattering element 40 are relatively fixed among the three. The bracket 50 is disposed at the light-transmitting part 33 so that the scattering element 40 can be kept in the optical path of the light source 10 emitting excitation light. The bracket 50 is capable of allowing the excitation light emitted by the light source 10 to pass through by opening a light channel 51. The two ends of the bracket 50 are respectively connected to the scattering element 40 and the light collecting element 30, so that the scattering element 40 is not easily separated from the light collecting element 30 or deviated from the light path of the excitation light from the light source 10 due to impact and vibration, which is beneficial for the scattering element 40 to more stably respond to the excitation light. Perform scattering.

In this embodiment, the bracket 50 is approximately a truncated cone. In this way, on the one hand, the volume of the bracket 50 can be reduced and the manufacturing cost of the bracket 50 can be reduced. On the other hand, the bracket 50 can reduce the excessive space occupied in the light collecting element 30. , Reduce the area where the bracket 50 shields the received laser light emitted by the wavelength conversion device 20, so that the light collection element 30 reflects the received laser light emitted by the wavelength conversion device 20 as much as possible, thereby reducing the loss of the received laser light.

The bracket 50 includes a first seat body 52, a connecting body 53, and a second seat body 54. The connecting body 53 connects the first seat body 52 and the second seat body 54. The connecting body 53 penetrates the light-transmitting part 33 and encloses a light channel. 51. The first seat body 52 is connected to the scattering element 40, and the second seat body 54 is disposed on the first surface 31.

Specifically, the radial dimension of the first seat 52 is smaller than the diameter of the light-transmitting portion 33, and the radial dimension of the second seat 54 is greater than the diameter of the light-transmitting portion 33. The user can first install the scattering element 40 on the first seat. Body 52, the first seat body 52 of the bracket 50 is penetrated from the first surface 31 side of the light collecting element 30 through the light transmitting portion 33, so that the first seat body 52 and the scattering element 40 are both located on the second surface 32 side , The second seat 54 is located on the side of the first surface 31 and is fixed to the first surface 31.

The first seat body 52 has a semicircular ring shape. The first seat body 52 includes a side wall 520, the side wall 520 encloses an accommodating groove 523, the accommodating groove 523 communicates with the light channel 51, the scattering element 40 may be in the shape of a disc, and the diameter of the scattering element 40 may be slightly larger than that of the side wall 520 The diameter of the enclosed accommodating groove 523 is such that when the scattering element 40 is disposed in the accommodating groove 523 and against the side wall 520, the scattering element 40 can be clamped in the accommodating groove 523.

The side wall 520 is provided with a notch 521, the notch 521 communicates with the accommodating groove 523, and the notch 521 is used for accommodating an adhesive so that the first seat body 52 and the scattering element 40 are bonded. Specifically, after the scattering element 40 is set in the accommodating groove 523, the user can fill the adhesive (not shown) in the notch 521, so that the scattering element 40 and the bracket 50 are bonded and fixed to each other and are not easily separated from the accommodation. Slot 523.

The second seat 54 includes a fitting surface 540, the fitting surface 540 faces the first surface 31, and the fitting surface 540 is provided with a glue storage groove 541. The glue storage groove 541 is recessed relative to the second seat 54 and surrounds the connecting body 53 It is provided that the glue storage tank 541 is used to contain the adhesive to bond the second seat 54 and the first surface 31.

Specifically, the user can fill the adhesive (not shown) in the glue storage tank 541, so that the bracket 50 and the light collection element 30 are bonded and fixed to each other, so that the bracket 50 and the light can be prevented from being impacted by the light source device 100. The collection elements 30 are separated from each other, thereby ensuring that the scattering element 40 provided on the bracket 50 is always located in the light path of the light source 10 emitting excitation light and scatters the excitation light, thereby improving the stability of the light source device 100. The glue storage tank 541 is arranged around the connecting body 53, which can increase the area occupied by the glue storage tank 541 of the second seat body 54, which is beneficial for the glue storage tank 541 to contain more adhesive, so that the first seat body 52 and the light collecting element 30 The connection is more stable. In addition, the second seat 54 is disposed on the first surface 31, which can reduce the area occupied by the second surface 32, so that the second surface 32 has a larger area to reflect the laser light emitted by the wavelength conversion device 20.

The radial dimension of the connecting body 53 is gradually reduced from the second seat body 54 along the direction of the first seat body 52, and can guide the excitation light emitted from the light source 10 to the scattering element 40 provided on the first seat body 52. The bonding surface 540 has a semi-elliptical ring shape, and the first surface 31 forms a plane corresponding to the bonding surface 540. The plane is perpendicular to the light path of the excitation light emitted by the light source 10. The central axis 330 of the light transmitting portion 33 deviates from the light collecting element 30 The central axis 34 makes the area of the plane larger, thereby increasing the contact area of the bonding surface 540 and the first surface 31.

In another embodiment of the present invention, when the scattering element 70 is mounted on the optical path of the light emitted by the light collecting element 30 through the bracket 80, the light source device 100 provided by the embodiment of the present invention is provided by installing the scattering element 70 On the optical path of the light emitted by the light collecting element 30, the light source device 100 emits the light scattered by the scattering element 70, which helps to distribute the light more uniformly, thereby helping to improve the light emitting effect of the light source device 100. In other embodiments, the light source device includes two scattering elements, namely, the scattering element 40 and the scattering element 70, wherein the scattering element 40 is fixed to the light collecting element 30 through the bracket 50 and corresponds to the light-transmitting part 33, and converts the wavelength to the radiation direction. The excitation light of the device 20 is scattered, so that the excitation light is scattered by the scattering element 40 and then incident to the wavelength conversion device 20. The scattering element 70 is installed on the optical path of the light emitted by the light collecting element 30 through the bracket 80 to collect the self-light. The light emitted by the element 30 is scattered. By providing the scattering element 40 and the scattering element 70, both the excitation light directed to the wavelength conversion device 20 and the light emitted from the light collection element 30 are scattered, so that the light emitted from the light source device 100 is distributed more uniformly, which is helpful To improve the light emitting effect of the light source device 100.

In this embodiment, the light source device 100 further includes a light homogenizing element 60 disposed between the light collecting element 30 and the scattering element 70. The light homogenizing element 60 is located in the exit light path of the light collecting element 30, and the scattering element 70 is installed through a bracket 80. On the light emitting side of the light homogenizing element 60, the light homogenizing element 60 is used to receive the light reflected by the light collecting element 30, and emit the light after homogenizing the light.

Specifically, the light homogenizing element 60 may be a light homogenizing element such as a square rod, an integrator rod, and a fly-eye lens. The light source device 100 is capable of homogenizing the received laser light by providing the homogenizing element 60, so that the brightness distribution of the laser spot emitted from the homogenizing element 60 is more uniform. When the wavelength conversion device 20 reflects a part of the unconverted excitation light and is reflected to the homogenizing element 60 through the light collecting element 30, the homogenizing element 60 can combine the part of the excitation light and the received laser light into a uniform beam, so that The color distribution of the light beam emitted from the light homogenizing element 60 is more uniform.

When the light homogenization element 60 and the wavelength conversion device 20 are located on the second surface 32 side of the light collection element 30, the positions between the light homogenization element 60 and the wavelength conversion device 20 can be arranged according to the shape of the light collection element 30. When the light collecting element 30 is in the shape of a semi-ellipsoidal shell, the light emitting surface of the wavelength conversion device 20 and the light incident surface of the light homogenizing element 60 are respectively arranged at different focal points of the light collecting element 30. When the light collecting element 30 is in the shape of a hemispherical shell, the light emitting surface of the wavelength conversion device 20 and the light incident surface of the light homogenizing element 60 are respectively arranged at two symmetrical points close to the center of the light collecting element 30, so that the light homogenizing element 60 It is symmetrical with the wavelength conversion device 20 about the central axis 34 of the light collecting element 30.

5, the scattering element 70 is installed on the light exit side of the light homogenizing element 60 through a bracket 80. At this time, the light source device 100 further includes a housing 93, a light source 10, a wavelength conversion device 20, a light collecting element 30, a scattering element 70, and a bracket. 80 and the light homogenizing element 60 are accommodated in the internal cavity of the housing 93. The bracket 80 includes a connected third seat 81 and a supporting seat 82. The third seat 81 is connected to the scattering element 70, and the supporting seat 82 is connected to the homogenizing element. The housing 93 on the light emitting side of the light element 60 helps keep the positions of the scattering element 70 and the light homogenizing element 60 unchanged, and is beneficial for the scattering element 70 to stably scatter the light emitted by the light homogenizing element 60. The structure of the support 50 connected to the housing 93 and the structure of the support 50 connected to the light collection element 30 may be the same or different. In this embodiment, the structure of the support 50 connected to the housing 93 is the same as that of the support 50 connected to the light collection element. The structure of the bracket 50 of 30 is different.

Referring to FIG. 1, the light source device 100 further includes a collecting lens group 90. The collecting lens group 90 may be composed of multiple lenses. For example, the collecting lens group 90 may be composed of three or four lenses. The collection lens group 90 collects, converges, and collimates the excitation light emitted from the light source 10 and guides it into the light-passing portion 33, thereby reducing the loss of excitation light.

Referring to FIG. 6, the scattering element 70 is disposed on the light output side of the light homogenizing element 60, and the scattering element 70 is used to receive the light emitted by the light homogenizing element 60, and scatter the light before emitting it. The light source device 100 is provided with the scattering element 70 to make the brightness distribution of the light spot of the emitted light more uniform. In addition, the applicant found that the brightness of the light spot uniformly emitted by the light homogenizing element 60 exhibits different uniformity at different positions. For example, the light source device shown in FIG. 7 is used to measure the brightness of the light spot. For ease of description, the light source 10, the wavelength conversion device 20, and the light collection element 30 are shown in the figure as the light source module 101, and the light source module 101 is used for For emitting light, the homogenizing element 60 is used to receive the light emitted from the light source module 101 and emit it after homogenization, and the collimating lens group 110 is used to receive the light emitted from the homogenizing element 60 and project it to the outside after being collimated.

In the light emitted from the light-emitting surface after homogenization element 60, the surface distribution of the energy of the light spot is uniform, as shown in Fig. 8; the angular distribution of the energy of the light spot is a discontinuous lattice array, as shown in Fig. 9 .

When the light projected by the collimating lens group 110 is at the position A, and the position A is located at the focal plane of the collimating lens group 110, the corresponding simulation diagram of the brightness of the light spot is shown in FIG. 10, and the brightness distribution of the light spot is uniform at this time.

When the light projected by the collimating lens group 110 is at the position B, the position B is located at the non-focal plane of the collimating lens group 110 and is closer to the collimating lens group 110 relative to the position A. The simulation diagram of the brightness of the corresponding spot is shown in Fig. 11 It is shown that the angular distribution of the energy of the spot is a discontinuous lattice arrangement, and the brightness distribution of the spot is uneven. In this case, when the light source device 100 is applied to a spotlight, it will cause more light beams emitted by the spotlight. The small broken beam visible to the human eye causes the spotlight to have a poor light output effect.

Based on this, as shown in FIG. 12, a scattering element 70 is provided between the homogenizing element 60 and the collimating lens group 110, so that the light emitted by the homogenizing element 60 is diffused through the scattering element 70. Please refer to FIG. 13, at this time, after the scattering element 70 is diffused, the dot matrix of the angular distribution of the energy of the light spot is more diffused than before the scattering element 70 is set, and the angles of adjacent dots are merged together to make the angle of the light energy The distribution becomes continuous.

When the light diffused by the collimating lens group 110 projected by the scattering element 70 is at the position A, the corresponding simulation diagram of the brightness of the light spot is shown in FIG. 14, and the brightness distribution of the light spot is uniform at this time. When the light projected by the collimating lens group 110 and diffused by the scattering element 70 is at the position B, the corresponding simulation diagram of the brightness of the light spot is shown in FIG. 15, and the brightness distribution of the light spot is uniform at this time. In this way, the light emitted from the light source module 101 is homogenized by the light homogenizing element 60, and then diffused by the scattering element 70, so that uniform light can be formed, so that the light has a higher brightness.

In some embodiments, after testing by the applicant, it is found that when the ratio of the diffusion angle of the scattering element 70 to the lattice spacing of the angular distribution of the light emitted by the homogenizing element 60 is greater than or equal to 1 and less than or equal to 2, the energy of the light is The effect of continuous angular distribution is better, and it is more conducive to the formation of uniform light, so that the light has higher brightness. As shown in Figure 16, the lattice spacing of the light emitted by the homogenizing element 60 is 5 degrees, and the diffusion angle of the scattering element 70 is 5 degrees. At this time, the angular distribution of the energy of the light is relatively continuous and the optical expansion of the emitted light is less than is too big. Wherein, the unit of the abscissa and the unit of the ordinate in FIG. 17 are both angles.

In some embodiments, the light homogenizing element 60 has both the functions of homogenizing light and scattering light. For example, as shown in Fig. 17, the light homogenizing element 60 is a solid element, and the light-emitting surface 61 of the light homogenizing element 60 is processed to form a shape of scattered light; or, as shown in Figs. 18 and 19, the light homogenizing element 60 is a solid element, The light homogenizing element 60 is provided with scattering particles 62, and the scattering particles 62 are used to scatter the light beam. The scattering particles 62 can fill the entire light homogenizing element 60 (Figure 18), or it can be filled with scattering particles 62 near the light exit surface 61 (Figure 19). , Wherein the refractive index of the scattering particles 62 is different from the refractive index of the homogenizing element 60. In this way, the light homogenizing element 60 has both light homogenization and scattering functions, which can reduce the number of scattering elements 70 and reduce production costs. At the same time, it also reduces the space occupied by the light source device 100 by the scattering elements 70, which is beneficial to promote the miniaturization of the light source device 100.

In some embodiments, referring to FIG. 20, the light source device 100 further includes a pattern sheet 91, and the pattern sheet 91 is located on a side of the scattering element 70 away from the light homogenizing element 60.

The scattering element 70 is used to receive the light beam emitted by the light homogenizing element 60 and guide the light beam to the pattern sheet 91. The light beam emitted by the light source 10 is homogenized by the homogenizing element 60 and then enters the scattering element 70. The light beam diffused by the scattering element 70 has higher uniformity, so that the beam irradiates the pattern sheet 91 and is projected out by the collimating lens group 110 The projection forms a better shape and color. For example, as shown in FIG. 21, the light source device 100 can project a pattern in a pattern sheet.

The light source device 100 further includes a collecting lens 92 disposed between the homogenizing element 60 and the diffusing element 70. The collecting lens 92 is used to receive the light emitted through the homogenizing element 60 and guide the light to the diffusing element 70. The collection lens 92 can collect and converge the light beam, so that the light beam is diffused by the scattering element 70 as much as possible and then emitted, which improves the collection rate of the light beam by the scattering element 70.

The above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should include Within the protection scope of the utility model.

Claims (11)

A light source device, which is characterized by comprising a light source, a wavelength conversion device, a light collection element, a support and a scattering element; The light source is used to emit excitation light; The wavelength conversion device is used to receive the excitation light and convert at least part of the excitation light into a received laser light; The light collecting element is arranged between the light source and the wavelength conversion device, the light collecting element is provided with a light-passing part, and the excitation light emitted by the light source passes through the light-passing part and enters the wavelength conversion A device, the light collecting element is used to collect the light emitted by the wavelength conversion device and guide it to emit; The scattering element is fixed to the light collecting element through the bracket and corresponding to the light-passing portion, and/or the scattering element is installed on the optical path of the light emitted by the light collecting element through the bracket, To scatter the excitation light directed to the wavelength conversion device and/or scatter the light emitted from the light collecting element. The light source device according to claim 1, wherein the scattering element is fixed to the light collection element through the bracket, and the bracket is connected to a side of the light collection element facing the wavelength conversion device, The scattering element and the wavelength conversion device are located on the same side of the light collection element. The light source device according to claim 2, wherein the bracket is provided with a light channel, the light channel penetrates the bracket and extends along the light path of the excitation light, and both ends of the bracket are connected to the The light collecting element and the scattering element are connected. The light source device according to claim 3, wherein the bracket comprises a first seat body, a connecting body and a second seat body connected in sequence, the connecting body encloses the light channel, and the connecting body passes through The first seat is connected to the scattering element, and the second seat is provided on the light collecting element. The light source device according to claim 4, wherein the first seat body comprises a side wall, the side wall encloses the accommodating groove, the accommodating groove communicates with the light channel, and The scattering element is arranged in the containing groove. The light source device according to claim 4, wherein the light collecting element comprises a first surface and a second surface, the first surface faces the light source, and the second surface faces the wavelength conversion device, The second seat body includes a fitting surface, the fitting surface surrounds the connecting body, and the fitting surface is connected to the first surface. The light source device according to claim 6, wherein the bonding surface is provided with a glue storage groove, the glue storage groove is recessed relative to the second seat and arranged around the connecting body, and the storage The glue groove is used for accommodating adhesive to bond the second seat body and the first surface. The light source device according to claim 1, wherein the scattering element is installed on the light path of the light emitted from the light collecting element through the bracket, and the light source device further comprises a light source device arranged on the light collecting element and The light homogenizing element between the scattering elements, the light homogenizing element is used to homogenize the light emitted by the light collecting element. 8. The light source device according to claim 8, wherein the light source device further comprises a housing, the bracket comprises a connected third base body and a supporting base, and the third base body is connected to the scattering element, The supporting seat is connected to the housing on the light emitting side of the light homogenizing element. 8. The light source device according to claim 8, wherein the light homogenizing element is provided with scattering particles, and the scattering particles are used to scatter the light beam passing through the light homogenizing element. 4. The light source device according to claim 1, wherein the light collecting element is a curved reflector, and the central axis of the light transmitting portion is different from the central axis of the light collecting element.

Images