阅读说明：本技术 发光装置 (Light emitting device ) 是由 陈雨叁 刘莹莹 简帅 许颜正 于 2018-09-10 设计创作，主要内容包括：本发明提供一种发光装置,包括：透明导光元件,包括第一端、与第一端相对的第二端、连通第一、第二端的收容槽,第一端的尺寸小于第二端的尺寸；基板,包括与第二端相连的第一部分和设置于第一部分的光源；波长转换元件,设置于收容槽内；第一反射层,设置于波长转换元件和基板的第一部分之间；透明导光元件背离收容槽的外表面设有全反射膜,波长转换元件和透明导光元件之间设有滤光膜。本发明通过使光源中的每个激光器所发出的激发光照射在波长转换元件的不同位置,有效避免了波长转换元件效率下降的问题,确保出射高亮度的光。(The present invention provides a light emitting device including: the transparent light guide element comprises a first end, a second end opposite to the first end and an accommodating groove communicated with the first end and the second end, wherein the size of the first end is smaller than that of the second end; a substrate including a first portion connected to the second end and a light source disposed at the first portion; a wavelength conversion element arranged in the accommodating groove; a first reflective layer disposed between the wavelength converting element and the first portion of the substrate; the outer surface of the transparent light guide element, which deviates from the containing groove, is provided with a total reflection film, and a filter film is arranged between the wavelength conversion element and the transparent light guide element. The invention effectively avoids the problem of efficiency reduction of the wavelength conversion element by irradiating the exciting light emitted by each laser in the light source at different positions of the wavelength conversion element, and ensures the emission of high-brightness light.)

1. A light-emitting device, comprising: the transparent light guide element comprises a first end, a second end opposite to the first end and a containing groove communicated with the first end and the second end, wherein the size of the first end is smaller than that of the second end;

the substrate comprises a first part connected with the second end and a light source arranged on the first part, and the light source is used for emitting exciting light to the transparent light guide element;

a wavelength conversion element, disposed in the housing groove, for generating a stimulated light under excitation of the excitation light;

a first reflective layer disposed between the wavelength converting element and the first portion of the substrate;

the outer surface of the transparent light guide element, which is far away from the containing groove, is provided with a total reflection film, and a filter film is arranged between the wavelength conversion element and the transparent light guide element.

2. The light-emitting device according to claim 1, wherein the light source is located between the accommodating groove and the outer surface of the transparent light guide element, and excitation light emitted by the light source is reflected by the total reflection film and then enters the wavelength conversion element.

3. The light-emitting device according to claim 2, wherein an angle between an outer surface of the transparent light guide element facing away from the receiving groove and the substrate is 45 °, and the excitation light emitted from the light source is reflected by the total reflection film and perpendicularly incident on the wavelength conversion element.

4. The light-emitting device according to claim 3, wherein the transparent light guide element has a truncated cone shape, the housing groove has a cylindrical shape, the wavelength conversion element has a cylindrical shape and is fitted in the housing groove, and a central axis of the wavelength conversion element and a central axis of the housing groove are the same as a central axis of the transparent light guide element.

5. The light-emitting device according to claim 3, wherein the transparent light-guiding element is shaped as a half-truncated cone, the transparent light-guiding element further comprises a first surface connecting the first end and the second end and perpendicular to the first portion of the substrate, the receiving groove is opened on the first surface, and the wavelength conversion element is semi-cylindrical and embedded in the receiving groove;

the substrate further comprises a second portion perpendicular to the first portion, the second portion is connected with the first surface of the transparent light guide element, and a second reflecting layer is arranged between the wavelength conversion element and the second portion.

6. The light-emitting apparatus according to claim 2, wherein the light source comprises a plurality of lasers, the plurality of lasers are distributed on a plurality of concentric circles having different diameters and centered at a center of the second end, and a density of the plurality of lasers is gradually decreased from a position near the wavelength conversion element to a position far from the wavelength conversion element.

7. The light-emitting device according to claim 2, wherein the wavelength conversion element is formed by splicing multiple segments of fluorescent ceramics, and the wavelength conversion element sequentially comprises an orange ceramic segment, a yellow ceramic segment (103b) and a green ceramic segment from one end close to the substrate to the other end far away from the substrate.

8. The light-emitting apparatus according to claim 7, wherein the light source comprises a plurality of lasers distributed on three concentric circles with different diameters and centered on the center of the second end, and the lasers on the different concentric circles respectively illuminate the green ceramic layer segment, the yellow ceramic layer segment or the orange ceramic layer segment.

9. The light-emitting device according to claim 2, wherein the wavelength conversion element is a YAG-Ce fluorescent ceramic and includes a plurality of layer segments in which the concentration of cerium ions gradually decreases from the end close to the substrate to the end away from the substrate.

10. The light-emitting apparatus according to claim 9, wherein the light source is composed of a plurality of lasers distributed on a plurality of concentric circles having different diameters and centered on a center of the second end, and the lasers on the different concentric circles respectively irradiate different layer sections of the wavelength conversion element.

11. The light-emitting apparatus according to claim 1, further comprising a scattering layer disposed on the wavelength converting element near the first end.

Technical Field

The invention relates to the technical field of optics and illumination, in particular to a light-emitting device.

Background

In recent years, laser light sources are more and more widely used, and light-emitting devices using laser as excitation light to excite fluorescent materials have the advantages of high conversion efficiency, inefficient dip, high brightness, small volume, good controllability and the like. At present, the commonly used laser lighting technology is to converge laser into a high-brightness laser spot to irradiate a fluorescent material, so that the excited laser emitted by the fluorescent material is mixed with the excitation light, thereby obtaining white light. However, when high-luminance emission light is required, if the laser power is increased, the efficiency of the fluorescent material is lowered due to local overheating because the optical power density of the laser spot is too high, and thus the luminance of the emission light cannot be increased.

Disclosure of Invention

The present invention is directed to a light emitting device capable of emitting light with high brightness and a method for manufacturing the same.

The technical problem to be solved by the invention is realized by the following technical scheme:

a light emitting device comprising: the transparent light guide element comprises a first end, a second end opposite to the first end and an accommodating groove communicated with the first end and the second end, wherein the size of the first end is smaller than that of the second end;

the substrate comprises a first part connected with the second end and a light source arranged on the first part, and the light source is used for emitting exciting light to the transparent light guide element;

the wavelength conversion element is arranged in the containing groove and used for generating stimulated light under the excitation of exciting light;

a first reflective layer disposed between the wavelength converting element and the first portion of the substrate;

wherein, the surface of the transparent light guide element departing from the containing groove is provided with a total reflection film, and a filter film is arranged between the wavelength conversion element and the transparent light guide element.

In an embodiment of the invention, the light source is located between the accommodating groove and the outer surface of the transparent light guide element, and excitation light emitted by the light source is reflected by the total reflection film and then enters the wavelength conversion element.

In an embodiment of the invention, an included angle between a surface of the transparent light guide element, which is away from the containing groove, and the substrate is 45 degrees, and excitation light emitted by the light source is reflected by the total reflection film and vertically enters the wavelength conversion element.

In an embodiment of the invention, the transparent light guide element is in a truncated cone shape, the receiving groove is in a cylindrical shape, the wavelength conversion element is in a cylindrical shape and is embedded in the receiving groove, and a central axis of the wavelength conversion element and a central axis of the receiving groove are the same as a central axis of the transparent light guide element.

In an embodiment of the invention, the transparent light guide element is in a shape of a half-round table, the transparent light guide element further includes a first surface connecting the first end and the second end and perpendicular to the first portion of the substrate, the receiving groove is opened on the first surface, the wavelength conversion element is in a half-cylinder shape and is embedded in the receiving groove;

in an embodiment of the invention, the substrate further comprises a second portion perpendicular to the first portion, the second portion being connected to the first surface of the transparent light guiding element, and a second reflective layer is arranged between the wavelength converting element and the second portion.

In one embodiment of the present invention, the light source is composed of a plurality of lasers, the plurality of lasers are distributed on a plurality of concentric circles with different diameters and the centers of the circles are the centers of the circles of the second ends, and the density of the plurality of lasers is gradually reduced from the direction close to the wavelength conversion element to the direction far away from the wavelength conversion element.

In an embodiment of the invention, the wavelength conversion element is formed by splicing multiple sections of fluorescent ceramics, and the wavelength conversion element sequentially comprises an orange ceramic layer section, a yellow ceramic layer section and a green ceramic layer section from one end close to the substrate to one end far away from the substrate.

In an embodiment of the invention, the light source is composed of a plurality of lasers, the plurality of lasers are distributed on three concentric circles with different diameters and taking the circle center of the second end as the circle center, and the lasers on the different concentric circles respectively irradiate on the green ceramic layer section, the yellow ceramic layer section or the orange ceramic layer section.

In one embodiment of the invention, the wavelength conversion element is a YAG: Ce fluorescent ceramic, and includes a plurality of layer segments in which the concentration of cerium ions gradually decreases from one end close to the substrate to the other end far from the substrate.

In an embodiment of the invention, the light source is composed of a plurality of lasers, the plurality of lasers are distributed on a plurality of concentric circles with different diameters and taking the center of the circle of the second end as the center, and the lasers on the different concentric circles respectively irradiate on different layer sections of the wavelength conversion element.

In one embodiment of the invention, the light emitting device further comprises a scattering layer arranged at the wavelength converting element near the first end.

In summary, the present invention provides a light emitting device, which can effectively avoid the problem of efficiency reduction of the wavelength conversion element and ensure high brightness light emission by irradiating the excitation light emitted by each laser in the light source to different positions of the wavelength conversion element.

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a light emitting device according to an embodiment of the present invention;

FIG. 2 is a schematic top view of a substrate according to an embodiment of the present invention;

FIG. 3 is a schematic view of an overall structure of a transparent light guide element according to an embodiment of the present invention;

FIG. 4 is a schematic view of an overall structure of a second light-emitting device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a three-wavelength conversion device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a four-wavelength conversion device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a five-wavelength conversion device according to an embodiment of the present invention;

fig. 8 is a flowchart of a method for manufacturing a light-emitting device according to a sixth embodiment of the present invention;

fig. 9 is a flowchart of a method for manufacturing a light-emitting device according to a seventh embodiment of the present invention.

Description of reference numerals:

101. 201-a light source;

102. 202-a transparent light guiding element;

1021. 2021-first end;

1022. 2022-second end;

102a, 202 a-an outer surface;

1023. 2023-a holding tank;

103. 203, 103' -wavelength converting element;

103 a-green ceramic layer segment;

103 b-yellow ceramic layer segment;

103 c-orange ceramic layer segment;

103 a' -upper layer;

103 b' -middle layer;

103 c' -lower layer;

108. 208-a scattering layer;

104. 204 — a first reflective layer;

207-a second reflective layer;

1024. 2024-total reflection film;

1025. 2025-light filtering film;

1051. 2051-first part;

2052-second part;

202 b-a first surface;

105. 205-a substrate;

106. 206-a heat sink;

1011. 1012, 1013-laser;

A. b, C-concentric circles;

l1-excitation light;

l2-stimulated light.

Detailed Description