CN113048442A

CN113048442A - Lamp set

Info

Publication number: CN113048442A
Application number: CN201911420763.0A
Authority: CN
Inventors: 何刚; 张志超; 邢美正
Original assignee: Shenzhen Jufei Optoelectronics Co Ltd
Current assignee: Shenzhen Jufei Optoelectronics Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-06-29
Also published as: WO2021135865A1

Abstract

The invention provides a lamp, which comprises a laser source, an exciting piece and a reflecting cup, wherein the exciting piece is covered in the reflecting cup; the exciting piece comprises a fluorescent piece and a shading piece surrounding the fluorescent piece and arranged around the fluorescent piece; in a working state, light emitted by the laser source faces the excitation piece, scattered light with uniform color tone is formed after the light is excited by the fluorescent sheet, and light at the edge is absorbed by the shading sheet; the scattered light is reflected by the reflecting cup and then is emitted to the appointed direction. Therefore, the light shielding sheets are arranged around the fluorescent sheet, so that the redundant light emitted by the laser source is absorbed, the problems of uneven light spots and different light colors when the fluorescent sheet is excited are avoided, and the lighting effect is improved.

Description

Lamp set

Technical Field

The invention relates to the technical field of lighting, in particular to a lamp.

Background

In the lighting technology, a high-brightness uniform lighting environment is mostly sought, for example, a lamp of a motor vehicle, a headlamp of which can improve the field of view, and which is a necessary facility at night and in foggy weather. However, in the related art, the lighting effect of the automotive headlamp is not ideal, and mainly reflects the problems of uneven light spots and uneven light color of emergent light, so that the actual lighting effect is not ideal.

Disclosure of Invention

The technical problem to be solved by the invention is that the lighting lamp has uneven light spots and uneven light color, and aiming at the technical problem, the invention provides a lamp which comprises a laser source, an exciting piece and a reflecting cup, wherein the exciting piece is covered in the reflecting cup; the exciting piece comprises a fluorescent sheet and a shading sheet surrounding the fluorescent sheet and arranged around the fluorescent sheet; in a working state, light emitted by the laser source faces the excitation piece, scattered light with uniform color tone is formed after the light is excited by the fluorescent sheet, and light at the edge is absorbed by the shading sheet; the scattered light is reflected by the reflection cup and then is emitted towards the appointed direction.

Optionally, the laser source is disposed above the excitation member, and the excitation member excites light emitted from the laser source in a reflection manner.

Optionally, the reflective cup is covered above the excitation member, and the light-emitting angle of the reflective cup is lateral light-emitting.

Optionally, the laser source is disposed on the reflective cup, and an included angle between a laser beam emitted from the laser source and a final outgoing beam reflected by the reflective cup is fixed. Optionally, the laser source is disposed below the excitation member, and the excitation member excites the laser source in a refraction manner.

Optionally, at least one condenser lens is further disposed between the laser source and the excitation member.

Optionally, the reflector cup covers the periphery of the excitation member.

Optionally, the laser source is a blue laser diode.

Optionally, the shade is made of dark color material.

Optionally, the thermal conductivity of the light shielding sheet is greater than or equal to a preset thermal conductivity threshold.

Advantageous effects

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a diagram illustrating a structure of a lamp according to a first embodiment;

FIG. 2 is a schematic diagram of the optical path structure of the vehicle-mounted laser lamp in the first embodiment;

fig. 3 is a diagram illustrating a structure of a lamp in a second embodiment.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

First embodiment

Referring to fig. 1, the present embodiment provides a lamp, which includes a laser source 1, an excitation member 2, and a reflective cup 3, wherein the reflective cup 3 covers the excitation member 2 therein; the exciting member 2 comprises a fluorescent sheet 21 and a light shielding sheet 22 surrounding the fluorescent sheet 21 and arranged around the fluorescent sheet 21; in the working state, the light emitted by the laser source 1 faces the excitation part 2, and forms uniform-tone scattered light after being excited by the fluorescent sheet 21, and the light at the edge is absorbed by the light shielding sheet 22; the scattered light is reflected by the reflector 3 and then emitted in a specified direction.

In the lamp in the embodiment, the laser source 1 is used as a light source, and then the light source is excited by the exciting piece 2 to obtain corresponding color light to be emitted. In the case of a luminaire, it has at least a light source and components for processing the light path, namely the exciter element 2 and the reflector cup 3 in the present exemplary embodiment. The excitation part 2 is used for exciting the laser emitted by the laser source 1, on one hand, the light color can be changed through excitation to obtain the desired color light, and on the other hand, the light path can be changed, so that the arrangement of the laser source 1 is more flexible. Because the laser has the characteristic of high concentration and high intensity, the illumination range of the laser source 1 is very small, and the optical path of the laser source 1 is adjusted through the exciting piece 2 and the reflecting cup 3 to obtain the required optical path. In the present embodiment, the laser light source 1 may be a blue laser diode.

Specifically, in the present embodiment, the excitation member 2 includes a fluorescent sheet 21 and a light shielding sheet 22, wherein the fluorescent sheet 21 is used for excitation of the laser light, and the light shielding sheet 22 is used for absorbing the excessive light. The light-shielding sheet 22 may be provided around the phosphor sheet 21, and may be integrally formed with the phosphor sheet 21, or may be provided separately, and then the light-shielding sheet 22 is wrapped around the phosphor sheet 21. In order to better absorb light from the shade 22, the shade 22 is made of a dark material in some embodiments. For example, the light shielding sheet 22 may be black or dark brown, so as to absorb light better. Of course, the light shielding sheet 22 only absorbs light at the edge, and the central portion of the laser light emitted from the laser light source 1 is received by the fluorescent sheet 21 and forms scattered light by excitation and scattering.

The size of the fluorescent sheet 21 is smaller than or equal to the beam size of the light emitted by the laser source 1, so that the light irradiated on the fluorescent sheet 21 by the laser source 1 is uniform, and the light excited by the fluorescent sheet 21 is also uniform; the light beam emitted from the laser light source 1 is absorbed by the light shielding sheet 22 when the beam is larger than the fluorescent sheet 21.

The laser source 1 is characterized by high energy, which causes a significant heating effect to the object irradiated by the source, i.e. the exciting member 2 is significantly heated, and if the temperature is too high, the effect of the exciting member 2 may be affected. Therefore, in some embodiments, the thermal conductivity of the light-shielding sheet 22 may be set to be equal to or greater than the preset thermal conductivity threshold, that is, the light-shielding sheet 22 is set to be a material with high thermal conductivity, so that the light-shielding sheet 22 realizes heat conduction, and the heat of the fluorescent sheet 21 can be rapidly dissipated through the light-shielding sheet 22; alternatively, the light-shielding sheet 22 may be a highly thermally conductive material such as metal.

The excitation member 2 in this embodiment may be divided into reflective excitation and refractive excitation according to the principle of the excitation light path, that is, the laser emitted from the laser source 1 is reflected excitation if the scattered light emitted to the fluorescent sheet 21 on the excitation member 2 is scattered in the form of reflected light; if the scattered light after being emitted to the fluorescent sheet 21 on the laser element is scattered in the form of refracted light, it is excited refractively. Wherein the reflex excitation is as follows:

in the reflective excitation, the laser source 1 is disposed above the excitation member 2, and the excitation member 2 excites light emitted from the laser source 1 by reflection. Reflective excitation, where the laser source 1 and the light that is finally emitted should be located on the same side of the excitation piece 2; referring to fig. 1, fig. 1 is a schematic structural diagram of a reflective excitation, in which light emitted from a laser source 1 is emitted to a fluorescent plate 21 on an excitation member 2 from above, and then the fluorescent plate 21 reflects scattered light, and the scattered light passes through a reflective cup 3 and is emitted in a predetermined direction.

Wherein, the reflecting cup 3 covers above the exciting piece 2, and the light-emitting angle of the reflecting cup 3 is side light-emitting. With continued reference to fig. 1, the reflector cup 3 of fig. 1 is covered above to reflect the scattered light reflected from the exciter 2.

In some embodiments, the laser source 1 is disposed on the reflective cup 3, and an included angle between a laser beam emitted from the laser source 1 and a final light beam reflected by the reflective cup 3 is fixed. The light emitted from the laser source 1 can be regarded as approximately parallel light, and in this embodiment, the light finally emitted through the reflective cup 3 is also parallel light, so that the included angle between the laser beam emitted from the laser source 1 and the final light-emitting beam reflected by the reflective cup 3 is fixed, and please refer to fig. 2. In the lamp of the present embodiment, the angle of the outgoing light beam finally emitted from the reflective cup 3 is preferably parallel to the ground.

In some embodiments, the laser source 1 is disposed on the reflector cup 3, and the exit angle of the laser source 1 and the exit angle of the reflector cup 3 have the same directional angular component. Referring to fig. 2, the laser source 1 and the initial emergent light are located on the same side of the excitation member 2, and the emergent angle of the laser source 1 and the emergent angle of the reflective cup 3 have the same directional angle components, which indicates that the emergent light of the laser source 1 is biased to the final emergent light. In fig. 2, the light emitted from the laser source 1 is a, and the light emitted from the reflector cup is B, where a and B have a component of the horizontal right angle in the figure. The angle component may be divided from the horizontal direction and the vertical direction, and preferably, the exit angle of the exit light of the laser light source 1 may be 45 ° from the normal direction.

The embodiment provides a lamp, which comprises a laser source 1, an exciting piece 2 and a reflecting cup 3, wherein the exciting piece 2 is covered in the reflecting cup 3; the exciting member 2 comprises a fluorescent sheet 21 and a light shielding sheet 22 surrounding the fluorescent sheet 21 and arranged around the fluorescent sheet 21; in the working state, the light emitted by the laser source 1 faces the excitation part 2, and forms uniform-tone scattered light after being excited by the fluorescent sheet 21, and the light at the edge is absorbed by the light shielding sheet 22; the scattered light is reflected by the reflector 3 and then emitted in a specified direction. Therefore, the light shielding sheets 22 are arranged around the fluorescent sheet 21 to absorb redundant light emitted by the laser source 1, so that the problems of uneven light spots and uneven light colors when the fluorescent sheet 21 is excited are avoided, and the lighting effect is improved.

Second embodiment

Referring to fig. 3, the present embodiment provides a lamp, which includes a laser source 1, an excitation member 2, and a reflective cup 3, wherein the reflective cup 3 covers the excitation member 2 therein; the exciting member 2 comprises a fluorescent sheet 21 and a light shielding sheet 22 surrounding the fluorescent sheet 21 and arranged around the fluorescent sheet 21; in the working state, the light emitted by the laser source 1 faces the excitation part 2, and forms uniform-tone scattered light after being excited by the fluorescent sheet 21, and the light at the edge is absorbed by the light shielding sheet 22; the scattered light is reflected by the reflector 3 and then emitted in a specified direction.

The excitation element 2 in this embodiment can be divided into reflection excitation and refraction excitation according to the principle of the excitation light path. Wherein the refractive excitation is as follows:

the laser source 1 is arranged below the exciting piece 2, and the exciting piece 2 excites the laser source 1 in a refraction mode. Referring to fig. 3, a structure diagram of refractive excitation is shown, which results in that the laser source 1 and the finally emitted light should be located on opposite sides of the excitation member 2, i.e. separated from the two sides of the excitation member 2. In this case, the phosphor plate 21 in the excitation member 2 is light-transmissive.

In some embodiments, at least one condenser lens may be further disposed between the laser source 1 and the excitation member 2. The arrangement of the condensing lens can further improve the condensing effect of the laser source 1, and improve the directivity and the intensity of the light emitted from the laser source 1 to the exciting member 2. In general, the condenser lens is a convex lens.

In some embodiments, the reflector cup 3 is housed around the exciter 2. The reflector cup 3 is arranged around the exciter 2 so that the final light is emitted in a direction directly outward along the exciter 2.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A lamp comprising a laser source, an excitation member and a reflector cup, said reflector cup housing said excitation member therein; the exciting piece comprises a fluorescent sheet and a shading sheet surrounding the fluorescent sheet and arranged around the fluorescent sheet; in a working state, light emitted by the laser source faces the excitation piece, scattered light with uniform color tone is formed after the light is excited by the fluorescent sheet, and light at the edge is absorbed by the shading sheet; the scattered light is reflected by the reflection cup and then is emitted towards the appointed direction.

2. The lamp of claim 1 wherein the laser source is disposed above the excitation member, and the excitation member excites light emitted from the laser source by reflection.

3. The lamp of claim 2, wherein the reflector cup is covered above the exciter, and the light exit angle of the reflector cup is a side light exit.

4. The lamp of claim 2, wherein the laser source is disposed on the reflector cup, and an angle between a laser beam emitted from the laser source and a final outgoing beam reflected by the reflector cup is fixed.

5. The lamp of claim 1 wherein said laser source is disposed below said excitation member, said excitation member exciting said laser source by refraction.

6. A lamp as claimed in claim 5, characterized in that between the laser source and the excitation member there is further provided at least one condenser lens.

7. A lamp as recited in claim 5, wherein said reflector cup is positioned around said driver element.

8. A luminaire as claimed in any one of claims 1 to 7, characterized in that the laser source is a blue laser diode.

9. A light fixture as recited in any one of claims 1-7, wherein the gobos are made of a dark color material.

10. The lamp of claim 9, wherein the thermal conductivity of the light shielding sheet is greater than or equal to a preset thermal conductivity threshold.