WO2019214218A1

WO2019214218A1 - Light source and illumination device

Info

Publication number: WO2019214218A1
Application number: PCT/CN2018/118831
Authority: WO
Inventors: 张贤鹏; 胡飞; 陈彬; 徐梦梦
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2018-05-08
Filing date: 2018-12-03
Publication date: 2019-11-14
Also published as: CN110454688A; CN110454688B

Abstract

A light source (10) and an illumination device (40), the light source (10) comprising a laser light source (11), a strip-shaped optical waveguide (13), and a planar optical waveguide (12); the laser light source (11) is used to emit a laser; the strip-shaped optical waveguide (13) is disposed on a light emergent path of the laser light source (11) and is used to receive the laser to form a linear light source so as to emit linear light; and the planar optical waveguide (12) is provided with an open slot (121), wherein the strip-shaped optical waveguide (13) is at least partially disposed in the open slot (121); and when the linear light is emitted, the planar optical waveguide (12) receives the linear light so as to form a planar light source. The present invention is capable of gradually scattering a laser such that an illumination region of the laser is wide, and heat dissipation is facilitated.

Description

Light source and lighting device

Technical field

The present application relates to the field of illumination, and in particular to a light source and a lighting device.

Background technique

Compared with the light-emitting diode device, the semiconductor laser device has the advantages of high power density and small divergence angle, and is easy to realize efficient optical waveguide coupling. However, as a field of indoor lighting, high optical power density will cause safety problems such as glare, too small a light-emitting area, excessive brightness, and human eye damage.

As an alternative, if a micro power device (such as Micro-LED or Micro-LD) is used, the array arrangement reduces the luminous power per unit area to constitute a light source, and the light source is prone to system stability deterioration due to an increase in the number of cores. problem.

Summary of the invention

The present application provides a light source and an illumination device capable of expanding the area of the light source and reducing the heat dissipation requirement by gradually dispersing the laser light.

A technical solution adopted by the present application is to provide a light source, including a laser light source, for emitting laser light; a strip optical waveguide disposed on the light path of the laser light source for receiving the laser to form a line light source to emit a linear light; a planar optical waveguide provided with an open slot, the strip optical waveguide being at least partially disposed in the open slot, and the planar optical waveguide receiving the linear light to form a surface when the linear light is emitted light source;

The planar optical waveguide includes a first light emitting surface and a first bottom surface opposite to the first light emitting surface, and further includes a circumferential side surface connecting the first light emitting surface and the first bottom surface,

The opening groove is disposed on the circumferential side surface, and includes two groove walls respectively facing the first light-emitting surface and the first bottom surface and a groove bottom connecting the two groove walls.

Wherein the strip-shaped optical waveguide includes a light-emitting section, the light-emitting section is attached to the groove bottom and the two groove walls, and the planar optical waveguide is passed through the groove bottom and the two groove walls The linear light is emitted.

The light exiting section includes a second light emitting surface, and the second light emitting surface is attached to the bottom of the groove, and the linear light is emitted to the planar optical waveguide through the groove bottom.

Wherein, the cross-sectional area of the light-emitting section in the direction toward the groove bottom is increased.

The strip-shaped optical waveguide further includes a reflective segment, and the reflective segment is connected to the light-emitting segment on a side of the light-emitting segment away from the groove bottom.

The connection area between the reflective segment and the light exiting segment is less than or equal to the minimum cross-sectional area of the light exiting segment.

The open slot includes a first slot segment and a second slot segment that are sequentially connected in a direction toward the slot bottom, the light exit segment is disposed in the second slot segment, and the reflective segment is at least partially disposed. In the first slot segment.

Wherein, the first light-emitting surface is provided with a fluorescence conversion layer, and the fluorescence conversion layer is used for spectrally converting the planar light when the planar light waveguide forms a surface light source to emit planar light.

In order to solve the above technical problem, another technical solution adopted by the present application is to provide a lighting device including the above-mentioned light source.

The beneficial effects of the present application are: providing a light source and an illumination device, wherein the laser light emitted by the laser light source forms linear light through a strip optical waveguide, and the linear light is further formed by a planar optical waveguide fixed through the open slot with the strip optical waveguide. The surface light, that is, the contact between the line light guide and the surface light guide, reduces the total reflection of the side of the line light guide, so that the light is more efficiently coupled into the surface light guide, thereby improving the light filling rate of the surface light exiting the surface. This expands the area of the light source, reduces the need for heat dissipation and avoids direct laser light.

DRAWINGS

1 is an exploded perspective view of a first embodiment of a light source provided by the present application;

2 is an exploded perspective view of the planar optical waveguide and the strip optical waveguide of FIG. 1;

Figure 3 is a schematic view showing the assembly of the planar optical waveguide and the strip optical waveguide of Figure 2;

4 is an exploded perspective view of a second embodiment of a light source provided by the present application;

Figure 5 is an exploded perspective view of an embodiment of the planar optical waveguide and the strip optical waveguide of Figure 4;

Figure 6 is an exploded perspective view showing another embodiment of the planar optical waveguide and the strip optical waveguide of Figure 4;

Figure 7 is a schematic view showing the assembly of the planar optical waveguide and the strip optical waveguide of Figure 5;

Figure 8 is a schematic view showing the assembly of the planar optical waveguide and the strip optical waveguide of Figure 6;

9 is an exploded perspective view of a third embodiment of a light source provided by the present application;

Figure 10 is an exploded perspective view showing an embodiment of the planar optical waveguide and the strip optical waveguide of Figure 9;

Figure 11 is an exploded perspective view showing another embodiment of the planar optical waveguide and the strip optical waveguide of Figure 9;

Figure 12 is a schematic view showing the assembly of the planar optical waveguide and the strip optical waveguide of Figure 10;

Figure 13 is a schematic view showing the assembly of the planar optical waveguide and the strip optical waveguide of Figure 11;

FIG. 14 is a schematic structural view of an embodiment of a lighting device of the present application.

Implementation

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Please refer to FIG. 1. FIG. 1 is an exploded perspective view of a first embodiment of a light source 10 provided by the present application. The light source 10 provided in the present embodiment includes a laser light source 11, a planar optical waveguide 12, and a strip optical waveguide 13.

The laser source 11 is used to emit a laser. Alternatively, the laser source 11 may be a blue laser source or other laser sources. The number of the laser source 11 may be one or more, which is not limited herein.

Referring collectively to FIGS. 1 and 2, the planar optical waveguide 12 is provided with an open slot 121.

Specifically, the planar optical waveguide 12 includes a circumferential side surface 12a and a first light-emitting surface 12b and a first bottom surface 12c connected to the circumferential side surface 12a. The opening groove 121 is disposed on the circumferential side surface 12a, and the number may be one or more.

Alternatively, the planar optical waveguide 12 may be an optical waveguide including, but not limited to, a rectangular body or a cylindrical body. In the illustration of the embodiment, the planar optical waveguide 12 is a rectangular body optical waveguide, and the circumferential side of the rectangular body optical waveguide The 12a includes four sides, and the number of the opening grooves 121 is one, and is provided on one side of the circumferential side surface 12a.

The opening groove 121 includes two groove walls 1211 respectively facing the first light-emitting surface 12b and the first bottom surface 12c, and a groove bottom 1212 connecting the two groove walls 1211.

Further, a fluorescent conversion layer 122 is further disposed on the first light-emitting surface 12b.

The strip-shaped optical waveguide 13 is disposed on the light-emitting path of the laser light source 11 for receiving the laser light emitted from the laser light source 11 to form a line light source to emit linear light.

Alternatively, the strip-shaped optical waveguide 13 may be a strip-shaped optical waveguide of any shape, such as a linear optical waveguide having a rectangular cross section in the illustrated embodiment, and may be a straight line having other shapes in other embodiments. Type optical waveguide or curved optical waveguide.

The strip-shaped optical waveguide 13 includes a second light-emitting surface 131, and the strip-shaped optical waveguide 13 emits the linear light through the second light-emitting surface 131 when linear light is emitted.

Further, the strip-shaped optical waveguide 13 further includes a reflecting surface 132 for emitting light to the reflecting surface 132 when the strip-shaped optical waveguide 13 forms a line light source, as shown by a straight arrow in FIG. The reflected surface 132 is reflected by the reflective surface 132 to the second light-emitting surface 131 to increase the amount of light emitted by the second light-emitting surface 131 and the light source utilization rate of the line source.

Optionally, the reflective surface 132 is a diffuse reflective surface or a specular reflective surface.

Optionally, the number of the strip optical waveguides 13 may be one or more, which is not limited herein.

Referring collectively to FIGS. 2 and 3, the strip-shaped optical waveguide 13 is at least partially disposed in the open slot 121, and when linear light is emitted, the planar optical waveguide 12 receives the linear light to form a surface light source.

Specifically, the strip-shaped optical waveguide 13 is at least partially disposed in the open slot 121 and the second light-emitting surface 131 of the strip-shaped optical waveguide 13 is attached to the slot bottom 1212 of the open slot 121, so that the second light-emitting of the strip-shaped optical waveguide 13 The face 131 emits linear light to the planar optical waveguide 12 through the groove bottom 1212 as indicated by the straight arrow in Fig. 3, so that the planar optical waveguide 12 receives the linear light to form a surface light source.

Optionally, in order to increase the receiving amount of the linear light received by the planar optical waveguide 12, an anti-reflective coating may be applied to the bottom 1212 of the groove to increase the amount of light transmitted by the groove bottom 1212.

Further, after receiving the linear light to form the surface light source, the planar optical waveguide 12 emits planar light through the first light-emitting surface 12b.

Optionally, in order to increase the amount of light emitted by the first light-emitting surface 12b and the light source utilization rate of the light source, the other side surfaces of the first bottom surface 12c and the circumferential side surface 12a where the opening groove 121 is not provided are reflective surfaces to receive linearity in the planar optical waveguide 12. In the case of light, light emitted to the first bottom surface 12c and the other side surface of the circumferential side surface 12a where the opening groove 121 is not provided is reflected to the first light-emitting surface 12b.

Further, when the planar optical waveguide 12 emits planar light through the first light-emitting surface 12b, the emitted planar light may be spectrally converted by the fluorescent conversion layer 122 to form light of a desired color, for example, in this embodiment, The laser light source 11 is blue light, and when the planar light guide 12 emits blue plane light, the blue plane light can be spectrally converted by the fluorescence conversion layer 122 to form white light.

In the above embodiment, the laser light is dispersed into a linear laser by a planar optical waveguide, and then the linear laser is further dispersed into a surface laser by a planar optical waveguide optical waveguide, and the illumination light is emitted through the fluorescent conversion layer of the light-emitting surface to form an illumination light. A surface light source reduces the need for heat dissipation and enhances light uniformity, making the lighting softer.

In particular, in the above embodiment, by uniformly dispersing the laser light and passing through the fluorescence conversion layer, it is possible to reduce the irradiation of the high-density laser light to the fluorescence conversion layer, prevent deterioration of the fluorescence conversion layer, and make the conversion more thorough and reduce the light loss.

Referring to FIG. 4, FIG. 4 is an exploded perspective view of a second embodiment of a light source 20 provided by the present application. The light source 20 of the present embodiment includes a laser light source 21, a planar optical waveguide 22, and a strip optical waveguide 23.

The laser source 21 is used to emit a laser. Optionally, the laser source 21 is a blue laser source or other laser source. The number of the laser source 21 may be one or more.

Referring collectively to FIGS. 4, 5, and 6, the planar optical waveguide 22 is provided with an open slot 221.

Specifically, the planar optical waveguide 22 includes a circumferential side surface 22a and a first light-emitting surface 22b and a first bottom surface 22c connected to the circumferential side surface 22a. The opening groove 221 is disposed on the circumferential side surface 22a, and the number may be one or more.

Alternatively, the planar optical waveguide 22 may be an optical waveguide including, but not limited to, a rectangular body or a cylindrical body. In the illustration of the embodiment, the planar optical waveguide 22 is a rectangular body optical waveguide, and the circumferential side of the rectangular body optical waveguide The 22a includes four sides, and the number of the opening grooves 221 is one, and is provided on one side of the circumferential side surface 22a.

The opening groove 221 includes two groove walls 2211 respectively facing the first light-emitting surface 22b and the first bottom surface 22c, and a groove bottom 2212 connecting the two groove walls 2211.

Alternatively, the cross-sectional area of the opening groove 221 in the direction facing the groove bottom 2212 may gradually increase as shown in FIG. 5 or remain unchanged as shown in FIG. 6.

Further, a fluorescent conversion layer 222 is further disposed on the first light-emitting surface 22b.

The strip-shaped optical waveguide 23 is disposed on the light-emitting path of the laser light source 21 for receiving the laser light emitted from the laser light source 21 to form a line light source to emit linear light.

Optionally, the strip optical waveguide 23 may be a linear optical waveguide or a curved optical waveguide including, but not limited to, a linear optical waveguide as an example.

5 and 7, the strip optical waveguide 23 is at least partially disposed in the open slot 221 of the planar optical waveguide 22, and when linear light is emitted, the planar optical waveguide 22 receives the linear light to form a surface light source.

Specifically, the strip-shaped optical waveguide 23 includes a light-emitting section 231. When the strip-shaped optical waveguide 23 receives the laser light emitted from the laser light source 21 to form a line light source, linear light is emitted through the light-emitting section 231, and the light-emitting section 231 is affixed in the open slot 221 The two groove walls 2211 and the groove bottom 2212 of the opening groove 221 are such that the light exiting section 231 emits linear light to the planar optical waveguide 22 through the two groove walls 2211 and the groove bottom 2212 as indicated by a straight arrow in FIG. Thereby the planar optical waveguide 22 receives the linear light to form a surface light source.

It can be understood that, since the light-emitting section 231 includes a plurality of light-emitting surfaces, when the strip-shaped optical waveguide 23 emits linear light through the light-emitting section 231, the light-emitting rate and the light-emitting of the strip-shaped optical waveguide 231 can be improved, and the light-emitting section 231 passes. The two groove walls 2211 disposed facing the first light-emitting surface 22b and the first bottom surface 22c are lighted, so that the first light-emitting surface 22b and the first bottom surface 22c of the planar optical waveguide 22 are located at the bottom of the groove 2212 as shown in FIG. The side portion can also receive linear light, thereby reducing or even eliminating the occurrence of shadows when the portion does not receive linear light, reducing or even eliminating the shadow region of the planar optical waveguide 22, and increasing the illumination of the planar optical waveguide 22. region.

Optionally, the cross-sectional area of the light exiting section 231 in the direction toward the groove bottom 2212 is gradually increased.

Referring to FIG. 6 and FIG. 8 together, when the cross-sectional area of the opening groove 221 in the direction facing the groove bottom 2212 remains unchanged, correspondingly, the cross-sectional area of the light-emitting section 231 in the direction toward the groove bottom 2212 remains unchanged. The light exiting section 231 is attached to the two groove walls 2211 and the groove bottom 2212 of the opening groove 221 in the opening groove 221, so that the light exiting section 231 passes through the two groove walls 2211 and the groove bottom as shown by the straight arrow in FIG. 2212 emits linear light to the planar optical waveguide 22, so that the planar optical waveguide 22 receives the linear light to form a surface light source. In this case, the first light-emitting surface 22b and the first bottom surface 22c of the planar optical waveguide 22 are also located in the groove. The portion on the left side of the bottom 2212 can also receive linear light, thereby reducing or even eliminating the occurrence of shadows when the portion does not receive linear light, reducing or even eliminating the shadow region of the planar optical waveguide 22, and increasing the planar optical waveguide. The illuminating area of 22.

Optionally, in order to increase the receiving amount of the linear light received by the planar optical waveguide 22, an anti-reflective coating may be applied to the bottom 2212 to increase the amount of light transmitted by the groove bottom 2212.

Referring to FIG. 5 and FIG. 6 , the strip optical waveguide 23 further includes a reflective segment 232 connected to the light exit segment 231 on a side of the light exit segment 231 away from the groove bottom 2212 for forming a line light source in the strip optical waveguide 23 . When the light emitted from the line source to the reflection section 232 is reflected by the reflection section 232 as shown by the linear arrow in FIG. 5 or FIG. 6 to the light exit section 231, the amount of light emitted from the light exit section 231 and the light source utilization of the line source are increased. rate.

Optionally, the connection area of the reflection section 232 and the light exit section 231 is equal to the minimum cross-sectional area of the light exit section as shown in FIG. 5 or smaller than the minimum cross-sectional area of the light exit section 231 as shown in FIG. 6 . It should be noted that in the present application, the minimum cross-sectional area of the light exiting section 231 is specifically perpendicular to the cross-sectional area facing the groove bottom direction.

Referring to FIG. 7 and FIG. 8 , when the light exiting section 231 of the strip optical waveguide 23 is disposed in the opening slot 221 and emits linear light to the planar optical waveguide 22 , the reflective section 232 is located outside the open slot 221 .

Further, after the planar optical waveguide 22 receives the linear light to form the surface light source, the planar light is emitted through the first light-emitting surface 22b.

Optionally, in order to increase the amount of light emitted by the first light-emitting surface 22b and the light source utilization rate of the light source, the other side surfaces of the first bottom surface 22c and the circumferential side surface 22a where the opening groove 221 is not provided are reflective surfaces to receive linearity in the planar optical waveguide 22. In the case of light, light emitted to the first bottom surface 22c and the other side surface of the circumferential side surface 22a where the opening groove 221 is not provided is reflected to the first light-emitting surface 22b.

Further, when the planar optical waveguide 22 emits planar light through the first light-emitting surface 22b, the emitted planar light may be spectrally converted by the fluorescent conversion layer 222 to form light of a desired color, for example, in this embodiment, The laser light source 21 is blue light, and when the planar light guide 22 emits blue plane light, the blue plane light can be spectrally converted by the fluorescence conversion layer 222 to form white light.

The above embodiment enhances the area of the planar optical waveguide by increasing the light exiting section, thereby reducing the shadow area of the planar optical waveguide and enhancing the fixation.

Referring to FIG. 9, FIG. 9 is an exploded perspective view of a third embodiment 30 of the panel provided by the present application. The light source 30 of the present embodiment includes a laser light source 31, a planar optical waveguide 32, and a strip optical waveguide 33.

The laser source 31 is used to emit a laser. Alternatively, the laser source 31 may be a blue laser source or other laser source. The number of the laser source 31 may be one or more, which is not limited herein.

Referring collectively to FIGS. 9 , 10 , and 11 , the planar optical waveguide 32 is provided with an open slot 321 .

Specifically, the planar optical waveguide 32 includes a circumferential side surface 32a and a first light-emitting surface 32b and a first bottom surface 32c connected to the circumferential side surface 32a. The opening groove 321 is disposed on the circumferential side surface 32a, and the number may be one or more.

Alternatively, the planar optical waveguide 32 may be an optical waveguide including, but not limited to, a rectangular body or a cylindrical body. In the illustration of the embodiment, the planar optical waveguide 32 is a rectangular body optical waveguide, and the circumferential side of the rectangular body optical waveguide The 32a includes four sides, and the number of the opening grooves 321 is one, and is provided on one side of the circumferential side surface 32a.

The opening groove 321 includes two groove walls 3211 respectively facing the first light-emitting surface 32b and the first bottom surface 32c, and a groove bottom 3212 connecting the two groove walls 3211.

Further, the opening groove 321 includes a first groove segment 321a and a second groove segment 321b which are sequentially connected in a direction toward the groove bottom 3212.

Optionally, the cross-sectional area of the second slot section 321b in the direction toward the slot bottom 3212 remains unchanged as shown in FIG. 10, or gradually increases as shown in FIG. 11, the first slot section 321a and the second slot. The connection area of the segment 321b is smaller than the minimum cross-sectional area of the second groove segment 321b as shown in FIG. 10 or equal to the minimum cross-sectional area of the second groove segment 321b as shown in FIG.

Further, a fluorescent conversion layer 322 is further disposed on the first light-emitting surface 32b.

The strip-shaped optical waveguide 33 is disposed on the light-emitting path of the laser light source 31 for receiving the laser light emitted from the laser light source 31 to form a line light source to emit linear light.

Alternatively, the strip optical waveguide 33 may be a linear optical waveguide or a curved optical waveguide including, but not limited to, a linear optical waveguide as an example.

Referring collectively to Figures 10 and 12, the strip optical waveguide 33 is at least partially disposed within the open slot 321 of the planar optical waveguide 32, and when linear light is emitted, the planar optical waveguide 32 receives the linear light to form a surface light source.

Specifically, the strip-shaped optical waveguide 33 includes a light-emitting section 331. The light-emitting section 331 is disposed in the second slot section 321b. When the strip-shaped optical waveguide 33 receives the laser light emitted by the laser light source 31 to form a line light source, linear light is emitted through the light-emitting section 331. The light exiting section 331 is attached to the groove bottom 3212 of the opening groove 321 and the portion of the two groove walls 3211 located in the second groove section 321b in the second groove section 321b, so that the light exiting section 331 is linear as shown in FIG. As indicated by the arrow, linear light is emitted to the planar optical waveguide 32 through the groove bottom 3212 and a portion of the two groove walls 3211 located in the second groove segment 321b, so that the planar optical waveguide 32 receives the linear light to form a surface light source.

It can be understood that, since the light-emitting section 331 includes a plurality of light-emitting surfaces, when the strip-shaped optical waveguide 33 emits linear light through the light-emitting section 331, the light-emitting rate and the light-emitting of the strip-shaped optical waveguide 331 can be improved, and the light-emitting section 331 passes. The two groove walls 3211 disposed facing the first light-emitting surface 32b and the first bottom surface 32c are lighted, so that the first light-emitting surface 32b and the first bottom surface 32c of the planar optical waveguide 32 are located at the bottom of the groove 3212 as shown in FIG. The side portion can also receive linear light, thereby reducing or even eliminating the occurrence of shadows when the portion does not receive linear light, reducing or even eliminating the shadow region of the planar optical waveguide 32, and increasing the illumination of the planar optical waveguide 32. region.

Optionally, the cross-sectional area of the light exiting section 331 in the direction toward the groove bottom 3212 remains unchanged.

Referring to FIG. 11 and FIG. 13 together, when the cross-sectional area of the second groove section 321b of the opening groove 321 in the direction facing the groove bottom 3212 is gradually increased, correspondingly, the section of the light-emitting section 331 in the direction toward the groove bottom 3212 The light-emitting portion 331 is gradually attached to the groove bottom 3212 of the opening groove 321 and the portion of the two groove walls 3211 located in the second groove segment 321b in the second groove segment 321b, so that the light-emitting portion 331 is as shown in the figure. The portion of the groove bottom 3212 and the two groove walls 3211 located in the second groove segment 321b emits linear light to the planar optical waveguide 32, so that the planar optical waveguide 32 receives the linear light forming surface, as indicated by the straight arrow in FIG. The light source, in this case, also allows the first light-emitting surface 32b of the planar optical waveguide 32 and the portion of the first bottom surface 32c located on the left side of the groove bottom 3212 to receive linear light, thereby reducing or even eliminating the portion being received. In the case where the shadow does not occur in the linear light, the shadow area of the planar optical waveguide 32 is reduced or even eliminated, and the light-emitting area of the planar optical waveguide 32 is increased.

Optionally, in order to increase the receiving amount of the linear light received by the planar optical waveguide 32, an anti-reflective coating may be applied on the bottom 3212 to increase the amount of light transmitted by the groove bottom 3212.

Referring to FIG. 10 and FIG. 11 , the strip optical waveguide 33 further includes a reflective segment 332 connected to the light exit segment 331 on a side of the light exit segment 331 away from the groove bottom 3212 for forming a line light source in the strip optical waveguide 33. The light emitted from the line source to the reflection segment 332 is reflected by the reflection segment 332 as shown by the linear arrow in FIG. 10 or FIG. 11 to the light exit portion 331 to increase the light output amount of the light exit portion 331 and the light source utilization of the line light source. rate.

Optionally, the connection area of the reflective segment 332 and the light exiting segment 331 is smaller than the minimum cross-sectional area of the light exiting segment as shown in FIG. 10 or equal to the minimum cross-sectional area of the light exiting segment 331 as shown in FIG.

Referring to FIG. 12 and FIG. 13 , the reflective segment 332 is at least partially disposed in the first slot segment 321 a of the open slot 321 , that is, when the light exit segment 331 of the strip optical waveguide 33 is disposed in the second slot segment 321 b of the open slot 321 . When the planar optical waveguide 32 emits linear light, the reflective segment 332 is at least partially disposed in the first slot segment 321a.

Further, after the planar optical waveguide 32 receives the linear light to form the optical surface source, the planar light is emitted through the first light-emitting surface 32b.

Optionally, in order to increase the amount of light emitted by the first light-emitting surface 32b and the light source utilization rate of the light source, the other side surfaces of the first bottom surface 32c and the circumferential side surface 32a where the opening groove 321 is not provided are reflective surfaces to receive linearity in the planar optical waveguide 32. In the case of light, light emitted to the first bottom surface 32c and the other side surface of the circumferential side surface 32a where the opening groove 321 is not provided is reflected to the first light-emitting surface 32b.

Further, when the planar optical waveguide 32 emits planar light through the first light-emitting surface 32b, the emitted planar light may be spectrally converted by the fluorescent conversion layer 322 to form light of a desired color, for example, in this embodiment, The laser light source 31 is blue light, and when the planar light guide 32 emits blue plane light, the blue plane light can be spectrally converted by the fluorescence conversion layer 322 to form white light.

Please refer to FIG. 14. FIG. 14 is a schematic structural diagram of an embodiment of a lighting device according to the present application. A illuminating device 40, the illuminating device comprising the light source 50 prepared in the above embodiment, the light source 50 may be the light source 10, the light source 20 and the light source 30 in the above embodiment, or other light source which can be prepared by the above embodiment There is no limitation here, wherein the light source 50 includes a laser light source, a reflection component, and a flat optical waveguide, which are not described herein. They may be street lamps, searchlights, and other laser illumination lamps, which are not limited herein.

In summary, those skilled in the art will readily understand that the present application provides a light source and an illumination device through a strip-shaped optical waveguide and a fixed planar optical waveguide through an open slot and a strip-shaped optical waveguide, so that the laser is stepped gradually. Disperse into a linear, dispersed laser light, and emit light through the fluorescent layer disposed on the light-emitting surface, thereby increasing the heat dissipation area, reducing the heat dissipation requirement, and enabling the laser to conduct back and forth in the optical waveguide, enhancing The thermal stability inside the optical waveguide increases the luminous efficiency, avoids concentrated laser direct radiation, greatly enhances the luminous efficiency and reduces the optical loss, and improves the practicality. In particular, the present application uniformly disperses the laser light and finally forms the illumination light through the fluorescence conversion layer. Compared with the prior art, the fluorescence conversion is first performed, and the dispersion has the following advantages, and the fluorescence conversion layer is not exposed to high density. The intense laser irradiation causes the fluorescence conversion layer to degrade, wherein the laser light does not change the light distribution to a Lambertian distribution before reaching the exit surface of the surface light guide, so that more light is scattered after multiple times to reach the light exit surface, thereby Causes light loss. Thereby, the life of the fluorescent conversion layer is greatly improved, the superiority of the light source is improved, and the loss is reduced.

The above is only the embodiment of the present application, and thus does not limit the scope of patents of the present application, and the equivalent structure or equivalent process transformation made by using the specification and the contents of the drawings, or directly or indirectly applied to other related technical fields, The same is included in the scope of patent protection of this application.

Claims

A light source, characterized in that the light source comprises:

a laser source for emitting laser light;

a strip-shaped optical waveguide disposed on the light-emitting path of the laser light source for receiving the laser to form a line light source to emit linear light;

The planar optical waveguide is provided with an open slot, the strip optical waveguide being at least partially disposed in the open slot, and the planar optical waveguide receives the linear light to form a surface light source when the linear light is emitted.
The light source according to claim 1, wherein the planar optical waveguide comprises a circumferential side surface and a first light emitting surface and a first bottom surface connected to the circumferential side surface, and the opening groove is disposed on the circumferential side surface, And comprising two groove walls respectively facing the first light-emitting surface and the first bottom surface and a groove bottom connecting the two groove walls.
The light source according to claim 2, wherein the strip-shaped optical waveguide comprises a second light-emitting surface, the second light-emitting surface is attached to the groove bottom to face the planar light through the groove bottom The waveguide emits the linear light.
The light source according to claim 2, wherein the strip-shaped optical waveguide comprises a light-emitting section, the light-emitting section is attached to the groove bottom and the two groove walls, and passes through the groove bottom and the The two trench walls emit the linear light to the planar optical waveguide.
The light source according to claim 4, characterized in that the cross-sectional area of the light exiting section in the direction toward the groove bottom is gradually increased or remains unchanged.
The light source according to claim 5, wherein the strip-shaped optical waveguide further comprises a reflective segment, the reflective segment being coupled to the light-emitting section on a side of the light-emitting section away from the groove bottom.
The light source according to claim 6, wherein a connection area of the reflection segment and the light exiting section is less than or equal to a minimum cross-sectional area of the light exiting section.
The light source according to claim 6, wherein the opening groove comprises a first groove segment and a second groove segment which are sequentially connected in a direction toward the groove bottom, and the light exiting segment is disposed in the second The reflective segment is at least partially disposed within the first slot segment.
The light source according to claim 2, wherein the first light-emitting surface is provided with a fluorescent conversion layer, and the fluorescent conversion layer is used for forming a surface light source to emit planar light when the planar optical waveguide The planar light is spectrally converted.
A lighting device comprising the light source according to any one of claims 1 to 9.