WO2020024610A1 - Light source system and light-emitting apparatus - Google Patents

Abstract

Disclosed are a light source system (100) and a light-emitting apparatus. The light source system (100) comprises: a first light source (110), a light conversion element (140), a heat dissipation device (150) and a light homogenizing device (160), wherein the first light source (110) is used for emitting first light; the light conversion element (140) is used for receiving the first light and converting some of the first light into fluorescence, and the light conversion element (140) is fixed to a first surface of the heat dissipation device (150); and the light homogenizing device (160) comprises a polygonal tapered rod. The polygonal tapered rod comprises: a polygonal light entry face (161) parallel to a light exiting face of the light conversion element (140); a light exiting face (162) having dimensions different from that of the light entry surface (161); and a connecting face (163) perpendicularly connected between the light entry face (161) and the light exiting face (162), the connecting face (163) being fixed to a second surface of the heat dissipation device (150). The connecting face (163) is perpendicularly connected between the light entry face (161) and the light exiting face (162) of the light homogenizing device (160), thereby facilitating the improvement in assembly convenience and precision, processing easiness and production efficiency of the light homogenizing device (160).

Description

Light source system and light emitting device Technical field

The present invention relates to the field of light source technology, and in particular, to a light source system and a light emitting device.

Background technique

This section is intended to provide a background or context to the specific embodiments of the invention that are set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.

In the field of lighting and display technology, the tapered optical integrator is widely used because it can reduce the small angle of light and improve the efficiency of light receiving and shaping.

However, in the field of miniature light source technology, such as small optical systems, with the shrinking of the entire light source device, the manufacturing of tapered optical integrator rods becomes more difficult. Self-gravity, and the optical surface processing after molding is also easy to break because the device becomes smaller.

Moreover, the assembly accuracy in the field of miniature light source technology is high. Because the general tapered optical integrator has a symmetrical structure along the optical axis, and its light incident surface and light exit surface have different sizes, that is, the side between the light incident surface and the light exit surface is opposite. The optical axis is tilted, which increases the difficulty of assembly and leads to low assembly accuracy.

Summary of the invention

In order to solve the technical problems of difficult assembly and low assembly accuracy of the cone optical integrator in the prior art, the present invention provides a light source system. The light source system includes a uniform light device with a polygon cone rod, which can effectively reduce The assembly is difficult and the assembly accuracy is improved. The invention also provides a light emitting device.

A light source system includes a first light source, a light conversion element, and a heat dissipation device, wherein the first light source is used to emit a first light; the light conversion element is fixed to a first surface of the heat dissipation device, Configured to receive the first light, and convert at least a portion of the first light into fluorescence having a wavelength different from the first light or change an angular distribution of the first light;

The light source system further includes a light homogenizing device for homogenizing the light emitted from the light conversion element. The light homogenizing device includes a polygonal vertebra rod, and the polygonal cone rod includes:

A polygonal light incident surface is parallel to the light emitting surface of the light conversion element;

A light emitting surface having a size different from the light incident surface; and

It is vertically connected to a connection surface between the light incident surface and the light exit surface, and the connection surface is fixed to a second surface of the heat sink.

Further, a reflection cup is further provided between the first light source and the light conversion element, and the first light emitted by the first light source passes through the reflection cup to irradiate the light conversion element, and the light conversion The light emitted from the element passes through the light incident surface and enters the light homogenizing device after being reflected by the reflection cup.

Further, the optical axis of the reflection cup is located between the light conversion element and the optical axis of the light homogenizing device.

Further, since a mounting groove for mounting the light homogenizing device is provided inside the heat dissipation device, a resist and an elastic member are respectively installed on two opposite side walls of the mounting groove, and the light homogenizing device includes A side surface disposed opposite to the connection surface, and the connection surface and the side surface are fixed in contact with the two side walls through the abutment member and the elastic member, respectively.

Further, the light conversion element is a fluorescent sheet, and a size of a light incident surface of the fluorescent sheet is smaller than a size of a light incident surface of the light homogenizing device.

Further, the light source system further includes a shaping lens, and the shaping lens is disposed corresponding to the light exit surface of the light homogenizing device, so as to shape and emit light emitted by the light homogenizing device. Between the optical axis of the light incident surface and the optical axis of the light exit surface of the light homogenizing device.

Further, the optical axis of the shaping lens is parallel to the connecting surface.

Further, a size of a light incident surface of the light uniformity device is smaller than a size of a light emitting surface thereof.

further,

The light incident surface of the light homogenizing device has a size of 0.3-1 mm, and / or the light exit surface 162 of the light homogenizing device has a size of 0.5-1.2 mm, and / or the length of the connecting surface is 5-40 mm.

Further, a reflection cup is further provided between the first light source and the light conversion element, and the first light emitted by the first light source passes through the reflection cup to irradiate the light conversion element, and the light conversion The light emitted by the element passes through the reflection cup and enters the light homogenizing device after being reflected by the reflection cup. The outer diameter of the reflection cup is 20-30 mm, and / or the size of the light exit surface of the light conversion element. It is 0.2-0.7mm.

Further, the shape of the light exit surface and the light entrance surface of the light homogenizing device is the same.

Further, the light homogenizing device includes a light emitting portion, the light emitting surface of the polygonal cone rod and the light incident surface of the light emitting portion are connected to each other and have the same outer contour, and the light emitting surface of the light emitting portion is circular. The light incident on the light incident surface of the polygonal cone rod is emitted from the light exit surface of the light exit portion.

Further, the light exit surface of the light exit portion and the light exit surface of the polygon cone rod are the same; or the light exit surface of the light exit portion is tangent to the light exit surface of the polygon cone rod.

A light emitting device includes the light source system according to any one of the above.

In the light homogenizing device of the light source system provided by the present invention, the connection surface is vertically connected between the light incident surface and the light emitting surface, which can ensure the positioning accuracy of the light incident surface and the light emitting surface of the light homogenizing device. To further improve the positioning accuracy of the connection surface, thereby helping to improve the assembly convenience, assembly accuracy, processing convenience, and production efficiency of the light uniformity device.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions of the embodiments / modes of the present invention more clearly, the drawings used in the description of the embodiments / modes are briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For a person of ordinary skill in the art, without drawing creative labor, other drawings may be obtained according to these drawings.

FIG. 1 is a schematic structural diagram of a light source system according to an embodiment of the present invention.

FIG. 2 is three views of a light homogenizing device provided by the first embodiment.

FIG. 3 is a schematic diagram of a horizontal casting mold of the light uniformizing device array shown in FIG. 2.

FIG. 4 is a side view of a horizontal mold of the light homogenizing device array shown in FIG. 3.

FIG. 5 is a schematic diagram of a far-field angle of the light source system using the uniformity device shown in FIG. 2.

FIG. 6 is a schematic diagram of the far field illumination distribution of the light source system using the uniformity device shown in FIG. 2.

FIG. 7 is a schematic diagram of the color coordinate distribution of the far-field CIE color gamut space of the light source system using the uniformity device shown in FIG. 2.

FIG. 8 is three views of a light homogenizing device according to a second embodiment.

FIG. 9 is a schematic diagram of the far field illumination distribution of the light source system using the uniformity device shown in FIG. 8.

FIG. 10 is a schematic diagram of the color coordinate distribution in the far-field CIE color gamut space of the light source system using the uniformity device shown in FIG. 8.

Explanation of main component symbols

Light source system	100
First light source	110
Reflection cup	130
Light conversion element	140
Heat sink	150
Resist	153
Elastic piece	154
Uniform light device	160, 260
Polygon cone	260a
Light department	260b
Incident surface	161
Light surface	162, 262b
Connecting surface	163, 263
side	164
Plastic lens	170
Upper mold	710
Lower mold	720
supporting item	730

The following specific embodiments will further explain the present invention in conjunction with the above drawings.

detailed description

In order to understand the above-mentioned objects, features, and advantages of the present invention more clearly, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. The described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

Please refer to FIG. 1, which is a schematic structural diagram of a light source system according to an embodiment of the present invention. The light source system 100 provided by the present invention can be applied to a lighting device, such as a portable light source, a general home lighting source, and other lighting equipment.

The light source system 100 includes a first light source 110, a light conversion element 140, a heat dissipation device 150, and a light homogenizing device 160. The first light source 110 is configured to emit first light. The light conversion element 140 is fixed to the first surface of the heat dissipation device 150, and is configured to receive the first light and convert at least part of the first light into fluorescence (or called a laser receiving light) having a wavelength different from the first light. ) Or change the angular distribution of the first light. The light homogenizing device 160 for homogenizing the light emitted from the light conversion element 140 is fixed on the second surface of the heat sink 150.

Specifically, the first light source 110 may be a blue light source, which emits blue first light. It can be understood that the first light source 110 is not limited to a blue light source, and the first light source 110 may also be a purple light source, a red light source, or a green light source. In this embodiment, the light emitter in the first light source 110 is a blue laser, and is configured to emit a blue laser light as the first light. It can be understood that the first light source 110 is provided with one or two blue lasers or a blue laser array, and the number of the lasers can be selected according to actual needs.

In one embodiment, the first light source 110 further includes a light homogenizing device, and the light homogenizing device is configured to uniformly irradiate the first light to the light conversion element 140. The light homogenizing device may be a fly-eye lens or an optical integrator. It can be understood that this feature is not necessary, especially in a miniaturized light source device, because the propagation distance is short, the light emitted from the first light source is directly incident on the light conversion element 140 after being collimated.

In this embodiment, the light conversion element 140 is a fluorescent sheet or a fluorescent layer provided on the surface of the heat sink 150. In this embodiment, the light conversion element 140 is a reflective fluorescent sheet / layer, and a reflective structure is provided on the side facing away from the incident surface. In the present invention, the reflection structure may be a metal reflection layer / film, or other reflection layers such as a diffuse reflection layer. The fluorescent sheet / layer absorbs at least part of the first light and emits fluorescence having a wavelength distribution different from that of the first light. The fluorescent sheet / layer may be either fluorescent silica gel, fluorescent glass, or fluorescent ceramic.

In the present invention, the fluorescent silica gel is an organic phosphor layer formed by bonding phosphors with an organic adhesive such as silica gel / resin, and is not limited to using silica gel as an adhesive. Fluorescent glass is an inorganic fluorescent powder layer formed by bonding a fluorescent powder after the glass powder is softened. Among them, silica gel, resin, and glass powder act as adhesives. The fluorescent ceramic is, for example, a pure-phase fluorescent ceramic or a multi-phase fluorescent ceramic. Pure-phase fluorescent ceramics can be various oxide ceramics, nitride ceramics, or oxynitride ceramics, and a light-emitting center is formed by adding a trace amount of an activator element (such as a lanthanide element) during the ceramic preparation process. Because the doping amount of the activator element is generally small (generally less than 1%), such fluorescent ceramics are usually transparent or translucent luminescent ceramics. Generally, the pure phase fluorescent ceramic has a polycrystalline structure, and the fluorescent sheet can also be a fluorescent single crystal. The fluorescent single crystal has better light transmission properties, and is generally colored and transparent, and has high thermal conductivity. Multi-phase fluorescent ceramics use transparent / translucent ceramics as a matrix, and fluorescent ceramic particles (such as phosphor particles) are distributed in the ceramic matrix. The transparent / translucent ceramic matrix can be various oxide ceramics (such as alumina ceramics, Y ₃ Al ₅ O ₁₂ ceramics), nitride ceramics (such as aluminum nitride ceramics), or oxynitride ceramics. The role of the ceramic matrix is to Light and heat are conducted so that the excitation light can be incident on the fluorescent ceramic particles and the received laser light can be emitted from the multi-phase fluorescent ceramics; the fluorescent ceramic particles assume the main luminous function of the fluorescent ceramics and are used to absorb the excitation light and convert it To be affected by laser. The crystal grain size of the fluorescent ceramic particles is large, and the doping amount of the activator element is large (such as 1 to 5%), which makes the luminous efficiency high; and the fluorescent ceramic particles are dispersed in the ceramic matrix to avoid being located in the fluorescent ceramic. The situation that the fluorescent ceramic particles at a deeper position cannot be irradiated by the excitation light, and also avoids the poisoning of the activator element concentration caused by the large doping amount of the pure phase fluorescent ceramic, thereby improving the luminous efficiency of the fluorescent ceramic. Scattering particles can be further added to each of the above fluorescent sheets / layers, so that the scattering particles are distributed in the fluorescent sheet / layer. The role of the scattering particles is to enhance the scattering of the excitation light in the luminescent ceramic layer, thereby increasing the optical path of the excitation light in the wavelength conversion layer, so that the light utilization rate of the excitation light is greatly improved, and the light conversion efficiency is improved. The scattering particles can be scattering particles, such as alumina, yttrium oxide, zirconia, lanthanum oxide, titanium oxide, zinc oxide, barium sulfate, etc., can be either a single material scattering particle, or a combination of two or more It is characterized by its apparent white color, which can scatter visible light, and its material is stable and can withstand high temperatures. The particle size and the wavelength of the excitation light are between the next order of magnitude. Scattering particles can also be replaced with pores of the same size, and the light is scattered by using the refractive index difference between the pores and the matrix or the adhesive to achieve total reflection. The fluorescent ceramic may also be another composite ceramic layer, and the composite ceramic layer is different from the above-mentioned multi-phase fluorescent ceramic only in that the ceramic matrix is different. The ceramic matrix is a pure phase fluorescent ceramic, that is, the ceramic matrix itself has an activator, which can emit laser light under the irradiation of excitation light. This technical solution combines the advantages of the above-mentioned luminescent ceramic particles of the multi-phase fluorescent ceramic with high luminous efficiency and the advantages of the luminescent properties of the above-mentioned pure-phase fluorescent ceramic. At the same time, the fluorescent ceramic particles and the fluorescent ceramic matrix are used to emit light, which further improves the luminous efficiency. In addition, although the ceramic matrix has a certain amount of activator doping, the doping amount is low, which can ensure that the ceramic matrix has sufficient light transmission. In the wavelength conversion layer, scattering particles or pores can also be added to enhance internal scattering. The light-emitting material (such as phosphor) of the fluorescent sheet / layer is not limited to a single material, and may also be a combination of multiple materials, or may be a superimposed combination of multiple material layers. The volume distribution of the light emitting center in the wavelength conversion layer is not limited to a uniform distribution, and may be a non-uniform distribution such as a gradient distribution.

In another embodiment, the light conversion element 140 may be replaced with a scattering element. The scattering element is used to change the light distribution of the first light, thereby eliminating the coherence of the first light. Preferably, the scattering element may be a diffusion sheet, such as an aluminum oxide diffuse reflection sheet, to convert the first light incident on the light conversion element 140. Light distributed for Lambert. When the first light source is an RGB three-color laser light source, the laser light can be de-coherent through the function of the light conversion element of the scattering element to obtain a uniform, non-speckle white illumination light beam. When the first light source is a monochromatic pure laser light source, the laser light can be de-coherent through the action of the light conversion element of the scattering element to obtain a uniform, non-speckle, monochromatic illumination beam.

The heat dissipation device 150 includes a heat source heat conducting portion and a heat dissipation fin which are thermally connected to each other. The heat dissipation fin is disposed on a side of the heat source heat conducting portion away from the light conversion element. The heat-conducting part of the heat source is thermally connected to the heat source, and the heat generated by the heat source is sequentially transferred to the air through the heat-conducting part of the heat source and the radiating fins. In this embodiment, the heat-conducting part of the heat source is a heat sink, and the heat source is the light conversion element 140. The first light is continuously irradiated to a predetermined area on the light conversion element 140 to generate illumination light, which causes the light conversion element 140 to generate heat and generate more light. Heat. Preferably, the heat source heat conducting portion is a metal heat sink having excellent heat dissipation performance, and the metal heat sink is also used to prevent light on the light conversion element 140 side from being transmitted through the heat dissipation device 150 to the shaping lens 170. In this embodiment, the heat dissipation device 150 includes a first surface for mounting the light conversion element 140 and a second surface for mounting the light uniformity device 160. Specifically, the heat sink 150 is provided with a mounting groove therein, the light homogenizing device 160 is provided inside the mounting groove, the second surface is a side wall of the mounting groove, and the first surface is adjacent to the second surface. In one embodiment, the heat dissipation device 150 is not provided with a mounting groove, and both sides of the light uniformity device 160 are respectively provided with a heat dissipation device 150 and a light blocking element. In one embodiment, the first surface is spaced from the second surface.

Further, a reflection cup 130 is disposed between the first light source 110 and the light conversion element 140. The first light emitted by the first light source 110 passes through the reflection cup 130 to illuminate the light conversion element 140, and the fluorescence emitted by the light conversion element 140 is reflected. The reflection from the cup 130 enters the light homogenizing device 160.

As shown in FIG. 1, the opening of the reflection cup 130 faces the light conversion element 140, the bottom of the reflection cup 130 faces the first light source 110, a reflective material is provided on the inner wall of the reflection cup 130, and a light entrance hole is provided at a position away from the optical axis of the bottom. A light is irradiated to the light conversion element 140 through the light incident hole. Most of the fluorescence is reflected by the reflection cup 130 and then incident on the light homogenizing device 160. In one embodiment, a part of the fluorescence leaks through the light entrance hole from the bottom of the reflection cup 130 toward the side of the first light source 110, and the size of the light entrance hole is equivalent to the size of the first light beam, thereby reducing fluorescence emitted from the light entrance hole. Chances to improve light efficiency. In one embodiment, an optical film, such as a spectral filter, is disposed in the light incident hole of the reflection cup 130 to transmit the first light to reflect the fluorescence. In a preferred embodiment, the outer diameter of the reflection cup 130 is 20-30 mm. It can be understood that, in the modified embodiment, other guiding devices known in the art (such as a mirror, a spectroscopic filter, a condensing lens, a relay lens, etc.) may also be used in place of the reflection cup 130 to convert the light. The light emitted from the element 140 is guided to the light homogenizing device 160.

Please refer to FIG. 2 with reference to FIG. 1. FIG. 2 is a three-view diagram of the light homogenizing device 160 provided by the first embodiment. The light homogenizing device 160 may be a solid structure or a hollow structure. In the embodiment of the present invention, the light homogenizing device 160 is a polygonal cone rod. Specifically, the light homogenizing device 160 includes a light incident surface 161, a light emitting surface 162, and a plurality of side surfaces connected between the light incident surface 161 and the light emitting surface 162. Further, the light incident surface 161 is polygonal, and the light exit surface 162 is opposite to the light incident surface 161. In the embodiment of the present invention, the light incident surface 161 and the light emitting surface of the light conversion device 140 are parallel to each other, so as to prevent the light emitted by the light homogenizing device 160 from deviating from the main optical axis of the light source system 100, which is helpful to simplify the arrangement of the internal components of the light source system 10.

The size of the light exit surface 162 of the light homogenizing device 160 is larger than that of the light entrance surface 161, which is beneficial to reduce the light exit angle and improve the light collection and shaping efficiency. In this embodiment, the shape of the light emitting surface 162 and the light incident surface 161 are the same, and both are square. For a micro-sized uniform light device 160, the aspect ratio of the uniform light device 160 is greater than 10 to obtain an ideal uniform light effect. The aspect ratio is the ratio of the longest diameter passing through the inside of the light homogenizing device 160 and the longest diameter perpendicular to it. Preferably, the size of the light entrance surface 161 is 0.3-1 mm, the size of the light exit surface 162 is 0.5-1.2 mm, and the length of the connection surface 163 is 5-40 mm. Wherein, the above "sizes" are all side lengths. It can be understood that the light incident surface 161 and the light exit surface 162 can also be in any shape of a circle, a triangle, a strip, or other regular or irregular polygons, and are not limited thereto. In the embodiment in which the light exit surface 162 and the light exit surface 162 are of arbitrary shapes, the “size” refers to the diameter of the largest inscribed circle or the smallest circumscribed circle of the light incident surface 161 and the light exit surface 162.

Please refer to FIGS. 3-4, FIG. 3 is a schematic view of a horizontal casting mold of the light homogenizing device 160 array shown in FIG. 2, and FIG. 4 is a side view of the horizontal casting mold of the light homogenizing device 160 array shown in FIG. 3. In the case that the processing mode of the casting mold can ensure the demolding accuracy and the surface finish of the mold, a large number of minute uniformity devices 160 can be obtained through the array method at one time, and the ideal smooth surface characteristics can be obtained. In the process of grouting, curing, demolding, and polishing of the mold, a support or grouting port is also needed to improve the molding efficiency. After the mold is completed, the support is subtracted by mechanical thinning and polishing to obtain the desired optical performance.

However, there are many technical challenges for a conical optical integrator rod with a small size (less than 1mm) of the light entrance surface and light exit surface, and an aspect ratio of 10 or more. Generally, three methods can be used for casting:

First, an upright mold can be adopted, that is, the light exit surface of the conical optical integrator and the support plane are kept horizontally. This casting method has the problem of demolding; when the mold is small in size, the shrinkage of the material or other stress problems during the grouting process can also easily cause the tapered optical integrator to collapse; when the support is thinned, it is also prone to mechanical stress. The non-uniformity causes the tapered optical integrator to break.

Common conical optical integrators have coaxial characteristics, that is, the geometric central axis of the light-entry surface and the light-exit surface are consistent. The coaxial conical optical integrator can solve the technical problems of the vertical mold by the horizontal array mold. Transverse casting means that one side of the coaxial conical optical integrator and the supporting plane are kept horizontal during the casting. However, the lateral mold will cause the problem of demodulation interference at the light entrance end of the coaxial conical optical integrator.

If a horizontal casting method is adopted, that is, the optical axis of the coaxial conical optical integrator rod is kept horizontal, the problem of the horizontal casting method is that the bottom surface thinning process formed near the supporting plane cannot be performed in an array, or can only be thinned in a single row.

As shown in FIG. 2 and FIG. 4, the plurality of side surfaces connected between the light incident surface 161 and the light exit surface 162 include a connection surface 163 and a side surface 164 disposed opposite to the connection surface 163, and the connection surface 163 is vertically connected to the light incident light. Between the surface 161 and the light emitting surface 162. The light homogenizing device 160 has a right-angled trapezoidal cross section along its optical axis and perpendicular to the connection surface 163.

The light homogenizing device 160 provided by the embodiment of the present invention can solve the above-mentioned manufacturing problems. As shown in FIG. 3-4, the upper mold 710, the lower mold 720, and the supporting member 730 are used in the casting process, wherein the supporting member 730 is embedded in the lower portion. Between the mold 720 and the upper mold 710, the light homogenizing device 160 is formed between the support member 730 and the upper mold 710, and the connection surface 163 of the light homogenizing device 160 is parallel to the surface of the support member 730. By adopting the form of upper and lower mold opening, a more ideal optical element surface can be obtained, and the support 730 and the grouting port can be maintained during demolding. After demoulding, the corresponding position of the upper mold 710 can be changed to a wax seal to maintain the overall flatness and fixation. Then, the uniformity device 160 is thinned from the bottom to the top until the support 730 is removed, and finally polished to obtain a plurality of uniform light.装置 160。 Device 160.

The connection surface 163 of the light homogenizing device 160 is formed on the surface of the support 730. Because the cross section of the light homogenizing device 160 along its optical axis and perpendicular to the connection surface 163 is a right-angle trapezoid, compared to the coaxial conical optical integrator rod, uniformity is avoided. The demolding interference of the light device 160 can also perform array thinning on the array of the light uniformity device 160, which is beneficial to improving the processing convenience and production efficiency of the light uniformity device 160.

Further, please refer to FIG. 1 in conjunction with FIG. 2. In this embodiment, the heat sink 150 is provided with a mounting groove, and the light homogenizing device 160 is fixed in the mounting groove in the heat sink 150. The two opposite side walls of the mounting groove are respectively A resisting member 153 and an elastic member 154 are installed, and the connecting surface 163 and the side surface 164 are fixed in contact with the two side walls through the resisting member 153 and the elastic member 154, respectively. In an embodiment in which a heat sink 150 and a light blocking element are respectively provided on both sides of the light uniformizing device 160, the connecting surface 163 may be fixed to the second surface by two fixing members.

The connecting surface 163 is vertically connected between the light incident surface 161 and the light emitting surface 162, which can ensure the positioning accuracy of the light incident surface 161 and the light emitting surface 162 of the light homogenizing device 160, and further improve the positioning accuracy of the connecting surface 163, which is conducive to improving uniformity. The assembly convenience, assembly accuracy, processing convenience, and production efficiency of the optical device 160.

Please refer to FIG. 5 to FIG. 7. FIG. 5 is a schematic diagram of the far field angle of the light source system 100 applying the uniformity device 160 shown in FIG. 2, and FIG. 6 is a far field diagram of the light source system 100 applying the uniformity device 160 shown in FIG. 2. FIG. 7 is a schematic diagram of illuminance distribution, and FIG. 7 is a schematic diagram of a far-field CIE color gamut spatial color coordinate distribution of the light source system 100 using the uniformity device 160 shown in FIG. 2. As shown in FIG. 5, the light homogenizing device 160 adjusts the exit angle of the incident fluorescence (Lambertian distribution). Most of the exit angles of the fluorescence are compressed between ± 1.5 degrees, which facilitates the subsequent stage of light collection and shaping, which is beneficial to Improve system light efficiency. In addition, as shown in FIG. 6-7, the uniformity effect of the light uniformity device 160 on the color and illuminance of the light is better. Specifically, the light emitted from the square light exit surface of the light homogenizing device 160 forms a corresponding square light spot in the far field, and the illuminance of the light spot is concentrated at 25-35 Lux; the color coordinates of the square light spot are concentrated near (0.4, 0.4). The illumination of the mixed primary colors is close to white.

Please further refer to FIG. 1, the light source system 100 further includes a shaping lens 170, which is disposed corresponding to the light exit surface 162 (FIG. 2) of the light homogenizing device 160 to shape and emit the light emitted by the light homogenizing device 160. It can be understood that the light source system 100 may further include other optical elements commonly used in the art, and details are not described herein.

The size of the light incident surface of the light conversion element 140 is smaller than the size of the light incident surface 161 (FIG. 2) of the light uniformity device 160, so that a larger proportion of the fluorescence emitted by the light conversion element 140 is reflected back to the light uniformity device 160 to reduce light energy. loss. In one embodiment, the light incident surface size of the light conversion element 140 ranges from 0.2 to 0.7 mm.

In the light source system 100, the optical axis of the reflection cup 130 is located between the light conversion element 140 and the optical axis of the light homogenizing device 160, and the optical axis of the shaping lens 170 is located at the geometric center of the light incident surface 161 and the light emitting surface 162a of the light homogenizing device 160 Therefore, the position and shape of the light spot of the light source system 100 are corrected, so that the maximum brightness position of the light emitted by the light source system is located on the main optical axis of the light.

Please refer to FIG. 8, which are three views of the light homogenizing device 260 according to the second embodiment. The light homogenizing device 260 differs from the light homogenizing device 160 mainly in that the light homogenizing device 260 includes a polygonal cone rod 260a and a light emitting portion 260b connected to each other. In one embodiment, the light homogenizing device 260 is a one-piece structure. It can be understood that, in other embodiments, the polygonal tapered rod 260a and the light emitting portion 260b are respectively fixedly connected and integrated after being formed. The light exit surface of the polygon cone bar 260a and the light entrance surface of the light exit portion 260b are connected to each other and have the same outer contour. The light exit surface 262b of the light exit portion 260b is the light exit surface of the light homogenizing device 260 and has a circular shape. The surface is a light incident surface of the light homogenizing device 260. The size of the light emitting surface 262b indicates the maximum inscribed circle diameter of the light surface 262b.

In this embodiment, the light emitting surface 262b of the light emitting unit 260b has a circular shape, so that the light spot of the light emitted from the light source system 100 is a circular spot, which meets the lighting requirements of general lighting sources. The polygonal tapered rod 260a in this embodiment has the same structure and function as the light homogenizing device 160 in the first embodiment. Within the scope of the spirit or basic features of the present invention, the specific solutions applicable to the uniform light device 160 in the first embodiment can also be correspondingly applied to the polygonal cone rod 260a in the second embodiment, in order to save space and avoid repetition. For the sake of brevity, I will not repeat them here.

In this embodiment, the light exit surface 262b of the light exit portion 260b has the same light exit aperture as the light exit surface of the polygon cone bar 260a, that is, the diameter of the light exit surface 262b of the light exit portion 260b is equal to the side length of the light exit surface of the polygon cone bar 260a. In one embodiment, the light-emitting surface 262b of the light-emitting portion 260b is tangent to the connecting surface 263, so that the connecting surface 263 is vertically connected between the light-emitting surface 262b and the light-incident surface of the polygonal tapered rod 260a, thereby ensuring the light entering device 260 The positioning accuracy of the light surface and the light emitting surface, and the positioning accuracy of the connection surface 263 are improved, which is beneficial to improving the assembly convenience, assembly accuracy, processing convenience, and production efficiency of the light uniformity device 160.

Please refer to FIG. 9 to FIG. 10. FIG. 9 is a schematic diagram of the far field illumination distribution of the light source system 100 using the uniformity device 260 shown in FIG. 8. FIG. CIE color gamut space color coordinate distribution diagram. The uniformity device 260 has a better uniformity effect on the color and illuminance of light. Specifically, the circular light emitting surface of the uniform light device 260 forms a corresponding circular light spot in the far field, and the illuminance of the light spot is concentrated at 25-35 Lux; the color coordinates in the circular light spot are concentrated near (0.4, 0.4), The illumination of the three primary colors is close to white.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments are to be regarded as exemplary and non-limiting in every respect, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore is intended to fall within the claims. All changes that come within the meaning and scope of equivalents are encompassed by the invention. Any reference signs in the claims should not be construed as limiting the claims involved. In addition, it is clear that the word "comprising" does not exclude other units or steps, and that the singular does not exclude the plural. Multiple devices stated in a device claim may also be implemented by the same device or system through software or hardware. Words such as first and second are used to indicate names, but not in any particular order.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be Modifications or equivalent substitutions can be made without departing from the spirit and scope of the technical solution of the present invention.

Claims (14)

1. A light source system includes a first light source, a light conversion element, and a heat dissipation device, wherein the first light source is used to emit a first light; the light conversion element is fixed to a first surface of the heat dissipation device, Configured to receive the first light, and convert at least a portion of the first light into fluorescence having a wavelength different from the first light or change an angular distribution of the first light;

   It is characterized in that the light source system further comprises a light homogenizing device for homogenizing light emitted from the light conversion element, the light homogenizing device includes a polygonal vertebra rod, and the polygonal cone rod includes:

   A polygonal light incident surface is parallel to the light emitting surface of the light conversion element;

   A light emitting surface having a size different from the light incident surface; and

   It is vertically connected to a connection surface between the light incident surface and the light exit surface, and the connection surface is fixed to a second surface of the heat sink.
2. The light source system according to claim 1, wherein a reflection cup is further provided between the first light source and the light conversion element, and the first light emitted by the first light source is irradiated through the reflection cup To the light conversion element, the light emitted by the light conversion element passes through the light incident surface and enters the light uniformity device after being reflected by the reflection cup.
3. The light source system according to claim 2, wherein an optical axis of the reflection cup is located between the light conversion element and an optical axis of the light homogenizing device.
4. The light source system according to claim 1, wherein a mounting groove for mounting the light homogenizing device is provided inside the heat dissipation device, and two opposite side walls of the mounting groove are respectively provided with a resisting force. And an elastic member, the light homogenizing device includes a side surface opposite to the connection surface, and the connection surface and the side surface are in contact with the two side walls through the resisting member and the elastic member, respectively. fixed.
5. The light source system according to claim 1, wherein the light conversion element is a fluorescent sheet, and a size of a light incident surface of the fluorescent sheet is smaller than a size of a light incident surface of the light homogenizing device.
6. The light source system according to claim 1, wherein the light source system further comprises a shaping lens, and the shaping lens is disposed corresponding to a light exit surface of the light uniformizing device to shape the light emitted by the light uniformizing device. After exiting, the optical axis of the shaping lens is located between the optical axis of the light incident surface and the optical axis of the light emitting surface of the light homogenizing device.
7. The light source system according to claim 6, wherein an optical axis of the shaping lens is parallel to the connecting surface.
8. The light source system according to claim 1, wherein a size of a light incident surface of the light uniformity device is smaller than a size of a light emitting surface thereof.
9. The light source system according to claim 8, wherein the size of the light incident surface of the light uniformity device is 0.3-1 mm, and / or the size of the light exit surface 162 of the light uniformity device is 0.5-1.2 mm, and / Or the length of the connecting surface is 5-40mm.
10. The light source system according to claim 9, wherein a reflection cup is further provided between the first light source and the light conversion element, and the first light emitted by the first light source is irradiated through the reflection cup To the light conversion element, the light emitted by the light conversion element is reflected by the reflection cup, passes through the light incident surface, and enters the light uniformity device, and the outer diameter of the reflection cup is 20-30 mm, and The size of the light emitting surface of the light conversion element is 0.2-0.7 mm.
11. The light source system according to any one of claims 1 to 10, wherein the shape of the light exit surface and the light entrance surface of the light homogenizing device is the same.
12. The light source system according to any one of claims 1 to 10, wherein the light homogenizing device comprises a light emitting portion, and the light emitting surface of the polygonal cone rod and the light incident surface of the light emitting portion are mutually connected and have an outer contour Similarly, the light emitting surface of the light emitting portion is circular, and light incident from the light incident surface of the polygonal cone rod is emitted from the light emitting surface of the light emitting portion.
13. The light source system according to claim 12, wherein the light exit surface of the light exit portion and the light exit surface of the polygon cone rod have the same clear aperture; or the light exit surface of the light exit portion and the polygon cone The light exit side of the stick is tangent.
14. A light-emitting device, comprising the light source system according to any one of claims 1-13.

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