CN111981431A

CN111981431A - Lighting lamp

Info

Publication number: CN111981431A
Application number: CN202010964503.6A
Authority: CN
Inventors: 龙涛; 邹诚; 陈玉
Original assignee: Chaoshijie Laser Technology Suzhou Co ltd
Current assignee: Chaoshijie Laser Technology Suzhou Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-11-24

Abstract

The invention discloses a lighting lamp, which can realize the maximum utilization rate of a lens unit by reasonably arranging a first light source group, a second light source group and a third light source group and partitioning the lens unit, so that light rays emitted by different light source groups are projected to different areas of the lens unit. Light that the second LED light source sent carries out the turn through the light path turn spare including first plane of reflection and second plane of reflection in proper order, can carry out the equivalent transfer with the light emitting area of second LED light source to dwindle the distance between the light emitting area of first LED light source and the light emitting area of second LED light source, can realize the maximize utilization ratio to the lens unit, not only solved the inhomogeneous problem of light, and carry out the light filling through third light source group to first light source group and/or second light source group, the luminance of illumination facula has been improved greatly. In addition, in the invention, the light sources of the first light source group and the second light source group are respectively radiated by different radiating substrates, so that the radiating speed is high and the efficiency is high.

Description

Lighting lamp

Technical Field

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

Background

The existing LED high-low beam integrated automobile headlamp structure is shown in fig. 1 and comprises a low-beam LED light source module 1, a high-beam LED light source module 2 and a lens 4. The dipped beam LED light source module 1 and the high beam LED light source module 2 are arranged on the upper side and the lower side of the same heat dissipation substrate, and the dipped beam LED light source module 1 and the high beam LED light source module 2 are basically overlapped or very close to each other at the positions on the two sides of the heat dissipation substrate, so that the heat dissipation surfaces of the two LED light sources are parallel to each other and are attached to the same heat dissipation substrate, and the heat dissipation substrates of the two LEDs are overlapped to seriously influence the heat dissipation effect of the system. In addition, in order to improve the light collection efficiency, the distance between the far and near light LED light source modules in the vertical direction cannot be too large, so that the thickness of a heat dissipation substrate between the far and near light LED light source modules is limited, the heat dissipation effect of the headlamp is also influenced, the temperature of the automobile lamp is increased finally, and the service life of the automobile lamp is shortened. In addition, because the LED light source has a certain thickness (usually 1-2mm) and a space is left between the LED light source and the heat dissipation substrate, a large distance (usually 5-7mm) must exist between the light emitting surfaces of the two light source modules, resulting in a large system size. In addition, because the distance between the light emitting surfaces of the two light source modules is large, no light rays or less light rays exist in the middle area of the lens 4, the brightness of the formed illumination light spots is uneven, and the light energy utilization rate and the illumination effect are reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the lighting lamp which can effectively improve the light energy utilization rate and the lighting effect.

In order to solve the technical problems, the technical scheme of the invention is as follows: a lighting fixture, comprising:

the first light source group comprises a first LED light source and a first reflecting cup corresponding to the first LED light source, and light rays emitted by the first LED light source are emitted after being reflected by the first reflecting cup;

the second light source group comprises a second LED light source and a light path turning piece corresponding to the second LED light source, and the light path turning piece at least comprises a first reflecting surface and a second reflecting surface;

a third light source group including at least one third light source;

a lens unit including at least a first region and a second region, the first region and the second region having different focal points;

the light rays emitted by the first light source group and the second light source group are projected to a first area of the lens unit, and the light rays emitted by the third light source group are projected to a second area of the lens unit and then emitted;

and light rays emitted by the second LED light source are reflected by the first reflecting surface and the second reflecting surface in sequence, converged to the focus of the first area, and then projected to the first area to be collimated and emitted.

Further, the light path turning piece is a light reflecting bowl, which comprises two reflecting surfaces, wherein the first reflecting surface is a curved reflecting surface, and the second reflecting surface is a plane reflecting surface.

Furthermore, the light path turning piece comprises a curved surface reflector and a plane reflector, the plane reflector corresponds to the light outlet of the curved surface reflector, and light rays emitted by the second LED light source sequentially pass through the curved surface reflector and the plane reflector and then are converged to the focus of the second area of the lens unit.

Furthermore, the light path turning piece comprises a curved surface light reflecting bowl and a right-angle prism, one of right-angle sides of the right-angle prism corresponds to a light outlet of the curved surface light reflecting bowl, and an inclined plane of the right-angle prism is a total internal reflection surface.

Further, the second light source group comprises at least two second LED light sources, and each second LED light source corresponds to one of the light path turning members.

Furthermore, the first region of the lens unit comprises a first lens, the second region comprises at least one second lens, the second lenses are in one-to-one correspondence with the third light sources, and light emitted by the third light sources is emitted after being collected and collimated by the second lenses.

Furthermore, the third light source group further comprises an optical focusing component, and light emitted by the third light source is converged to the focal point of the second region after passing through the optical focusing component.

Furthermore, the second area of the lens unit is a plane window, the third light source group further includes an optical collimating element located behind the third light source, and light emitted by the third light source is collected and collimated by the optical collimating element and then emitted from the plane window.

Further, the light emitted by the third light source and the light emitted by the second LED light source are different in color.

Furthermore, the second LED light source group further includes a laser source, and light emitted by the laser source is projected onto one of the second LED light sources.

Further, the third light source may be one or more, and may employ a laser source or an LED light source, or a combination of a laser source and an LED light source.

Further, the LED lamp also comprises a heat dissipation substrate corresponding to the first LED light source, the second LED light source and the third light source respectively.

According to the lighting lamp provided by the invention, the first light source group, the second light source group and the third light source group are reasonably arranged, and the lens unit is partitioned, so that light rays emitted by different light source groups are projected to different areas of the lens unit, and the maximum utilization rate of the lens unit can be realized. In addition, light emitted by the second LED light source is turned by the light path turning piece comprising the first reflecting surface and the second reflecting surface in sequence, the light emitting surface of the second LED light source can be equivalently transferred to one side infinitely close to the first LED light source, so that the distance between the light emitting surface of the first LED light source and the light emitting surface of the second LED light source is reduced, the problem of non-uniform light is solved, light is supplemented to the first light source group and/or the second light source group through the third light source group, and the brightness of an illumination light spot is greatly improved. In addition, in the invention, the light sources of the first light source group and the second light source group are respectively radiated by different radiating substrates, so that the radiating speed is high and the efficiency is high.

Drawings

FIG. 1 is a schematic structural diagram of an LED high-low beam integrated automobile headlamp in the prior art;

fig. 2 is a schematic structural diagram of a lighting fixture in embodiment 1 of the present invention;

FIGS. 3a to 3c are schematic views showing three specific structures of a lens unit in example 1 of the present invention;

fig. 4 is a schematic structural diagram of an optical path turning piece in embodiment 2 of the present invention;

fig. 5 is a schematic structural diagram of an optical path turning piece according to embodiment 3 of the present invention;

fig. 6 is a schematic structural diagram of an optical path turning piece according to embodiment 4 of the present invention;

fig. 7 is a schematic structural diagram of a lighting fixture in embodiment 5 of the present invention;

fig. 8 is a schematic structural diagram of a lighting fixture in embodiment 6 of the present invention;

FIGS. 9 to 10 are two specific structural views of a lighting device in example 7 of the present invention;

FIGS. 11a to 11b are schematic views showing two specific structures of a lens unit in example 8 of the present invention;

fig. 12 to 13 are schematic views of two specific structures of a lighting fixture in embodiment 9 of the present invention.

Shown in FIG. 1: 1. a dipped beam LED light source module; 2. a high beam LED light source module; 4. a lens;

shown in fig. 2-13: 10. a first light source group; 110. a first LED light source; 120. a first reflective cup; 20. a second light source group; 210. a second LED light source; 220. a light path turning member; 221. a first reflective surface; 222. a second reflective surface; 223. a curved surface reflector; 224. a plane mirror; 225. a right-angle prism; 230. a laser source; 310. a third light source; 320. a spherical light reflecting bowl; 321. a light through hole; 330. an optical focusing member; 340. an optical collimating element; 40. a lens unit; 410. a first lens; 420. a second lens; 430. a planar window; 50. a light shield.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 2, the present invention provides a lighting fixture, which includes a first light source group 10, a second light source group 20, a third light source group and a lens unit 40.

The first light source group 10 includes a first LED light source 110 and a first reflective cup 120 corresponding to the first LED light source 110, and light emitted from the first LED light source 110 is reflected by the first reflective cup 120 and then emitted in a specific direction. The first LED light sources 110 may be provided in a plurality of positions corresponding to the focal point of the first reflective cup 120, and the light emitted from the first LED light sources 110 is reflected by the first reflective cup 120 and then emitted.

The second light source group 20 includes second LED light source 210 and with the light path turning piece 220 that second LED light source 210 corresponds, light path turning piece 220 includes first plane of reflection 221 and second plane of reflection 222 at least, in this embodiment, certain contained angle is personally submitted with first LED light source 110's the play plain noodles of second LED light source 210, and the play plain noodles of both are not collinear nor parallel promptly, the contained angle between the light emitting surface of second LED light source 210 and the light emitting surface of first LED light source 110 is 45-90 degrees, and the contained angle between the two shown in fig. 2 is 90 degrees, and light emitting surface mutually perpendicular promptly both, and dispel the heat through solitary heat dissipation channel respectively, and the radiating rate is fast, and is efficient.

The third light source group includes a third light source 310. The third light source 310 may be a laser source or an LED light source, or a combination of a laser source and an LED light source. The laser source may employ a laser diode or a semiconductor laser. In this embodiment, taking the LED light source as an example, the third light source group is used to supplement light to the first light source group 10 and/or the second light source group 20, so as to increase the brightness of the illumination light spot. Of course, the color of the light emitted from the third light source group may be different from the colors of the first light source group 10 and the second light source group 20, for example, the light emitted from the third light source group may be yellow, so that the light-emitting device can improve the penetrating power of the illumination spots and improve the illumination effect in rainy and foggy days.

In this embodiment, the first light source group 10 and the second light source group 20 are vertically arranged, the third light source group is horizontally arranged with the first light source group 10 and the second light source group 20, and the third light source group does not block the light emitted from the first light source group 10 and the second light source group 20. In this embodiment, the third light source group is located in front of the light outlet of the first light source group 10, and does not block the light emitted from the first light source group 10.

The lens unit 40 at least includes a first region and a second region, and the first region and the second region have different focuses, which are respectively a first focus and a second focus, in this embodiment, the second region and the first region are respectively located at the upper side and the lower side of the lens unit 40, and respectively include a lens, which is respectively a first lens 410 and a second lens 420, the focus of the first lens 410 is the first focus, the focus of the second lens 420 is the second focus, the light emitted from the first light source group 10 and the second light source group 20 is projected to the first region of the lens unit 40, and the light emitted from the third light source group is projected to the second region of the lens unit 40 and then is collimated to be emitted. Fig. 3a to 3c respectively show several structural schematic diagrams of the lens unit 40, in fig. 3a to 3c, the first lens 410 and the second lens 420 have different sizes, the size of the second lens 420 corresponds to the light beam emitted by the third light source group, the second lens 420 may be a complete lens, that is, the outer peripheral profile of the second lens 420 is circular or elliptical, or may be an incomplete lens, the first lens 410 is an incomplete lens, one end of the first lens 410 corresponding to the second lens 420 in fig. 3a to 3b is a plane, in fig. 3c, one end of the first lens 410 corresponding to the second lens 420 is a concave surface, and two sides of the top end of the first lens 410 extend to one side of the second lens 420.

As shown in fig. 2, the light emitted from the first LED light source 110 is reflected by the first reflective cup 120, emitted downward, and projected to the lower half of the first lens 410 to be collimated and emitted.

The light emitted from the second LED light source 210 is reflected by the first reflecting surface 221 and the second reflecting surface 222, then converged to the focus of the first area, and then projected to the first area to be collimated and emitted. In this embodiment, the light shielding plate 50 is further included between the first light source group 10 and the second light source group 20 and the lens unit 40, a focal point of the first region corresponds to a certain position on the top of the light shielding plate 50, and the light emitted from the second LED light source 210 converges to the certain position on the top of the light shielding plate 50, and then is projected to the first region of the lens unit 40, that is, the upper half portion of the first lens 410 in fig. 2 and then is collimated and emitted.

The light emitted from the third light source group is projected to the second lens 420 and then collimated and emitted. Through the reasonable arrangement of the first light source group 10, the second light source group 20 and the third light source group, the whole space of the lens unit 40 can be utilized to the maximum extent, and the illumination effect is greatly improved.

As shown in fig. 2, the light path turning member 220 may be a light reflecting bowl, which includes two reflecting surfaces, a first reflecting surface 221 is a curved reflecting surface, a second reflecting surface 222 is a planar reflecting surface, the curved surface is an approximate ellipsoid, the light emitted from the second LED light source 210 is reflected twice by the curved surface reflection surface and the plane reflection surface in sequence, the plane reflection surface can be regarded as an equivalent light source surface of the second LED light source 210, the top of the first LED light source is as close as possible to the horizontal line corresponding to the light emitting surface of the first LED light source 110, thereby reducing the distance between the light emitting surface of the first LED light source 110 and the light emitting surface of the second LED light source 210, and on the other hand, since the spacing between the light emitting faces of first LED light source 110 and second LED light source 210 is small or even 0 pitch, therefore, the condition that no light rays exist in the middle area of the lens unit 40 or the light rays are few is improved, and the light efficiency and the light energy utilization rate of the whole system are effectively improved. Of course, the optical path turning member 220 may be other optical elements as long as the above-mentioned effects can be achieved.

The lighting fixture further comprises heat dissipation substrates (not shown in the figure) corresponding to the first LED light source 110, the second LED light source 210 and the third light source 310 respectively, and the heat dissipation substrates dissipate heat respectively for the first LED light source 110, the second LED light source 210 and the third light source 310, and each heat dissipation substrate dissipates heat independently without interfering with each other, so that the problem that the heat dissipation efficiency is reduced due to over concentration of heat can be avoided.

Example 2

Different from embodiment 1, in this embodiment, the second light source group 20 includes at least two second LED light sources 210, and each of the second LED light sources 210 corresponds to one of the light path turning members 220, as shown in fig. 4. Each light path turning member 220 at least includes a first reflecting surface and a second reflecting surface, each second LED light source 210 is respectively reflected by the corresponding light path turning member 220 and then converges to the focus of the first region of the lens unit 40, therefore, it can be seen that a certain included angle is formed between the light path turning members 220, and a plurality of light path turning members 220 can be formed integrally or mounted independently, and a plurality of second LED light sources 210 can be disposed on the same substrate or on different substrates, in this embodiment, taking two second LED light sources 210 as an example, for convenience of mounting, two second LED light sources 210 are mounted on the same substrate, the light path turning member 220 is a reflective bowl having a curved surface structure and a planar surface structure, and the position between two light path turning members 220 can be adjusted according to the light path requirement, in this embodiment, a certain included angle exists between two curved surface structures, there is no included angle between the two plane structures, and the two plane structures are integrally formed.

Example 3

As shown in fig. 5, different from embodiment 1, in this embodiment, the optical path turning member 220 includes a curved light reflecting bowl 223 and a planar reflector 224, the planar reflector 224 corresponds to the light outlet of the curved light reflecting bowl 223, and the light emitted by the second LED light source 210 sequentially passes through the curved light reflecting bowl 223 and the planar reflector 224 to be reflected and then converged to the focus of the second region of the lens unit 40. The curved surface light reflecting bowl 223 is similar to an elliptical surface, and has two focuses, wherein one focus is corresponding to the second LED light source 210, and the other focus is coincident with the focus of the second area of the lens unit 40, and the plane mirror 224 is inclined relative to the curved surface light reflecting bowl 223 to form a total reflection surface, so that the light projected by the curved surface light reflecting bowl 223 is totally reflected and converged to the focus of the second area of the lens unit 40.

Example 4

As shown in fig. 6, different from embodiment 1, in this embodiment, the optical path turning member 220 includes a curved surface light reflecting bowl 223 and a right-angle prism 225, one of right-angle sides of the right-angle prism 225 corresponds to a light outlet of the curved surface light reflecting bowl 223, and an inclined surface of the right-angle prism 225 is a total internal reflection surface. The light emitted by the curved surface light reflecting bowl 223 is incident on the inclined plane from the right-angle edge of the right-angle prism 225 corresponding to the curved surface light reflecting bowl, and is converged at the focus of the second area of the lens unit 40 after the light is totally internally reflected by the inclined plane, and the total internal reflection surface can realize zero loss of the light, thereby avoiding the problem of light waste.

Example 5

As shown in fig. 7, different from embodiment 1, in this embodiment, the second light source group 20 further includes at least one laser source 230, the light emitted by the laser source 230 is projected onto one of the second LED light sources 210, the LED light source includes an LED chip and a fluorescent powder piece, the light path turning member 220 is taken as an example of a light reflecting bowl, a light through hole is formed on the light reflecting bowl corresponding to the second LED light source 210, the light beam emitted by the laser source 230 is projected onto the fluorescent powder piece in the second LED light source 210 through the light through hole, of course, the light through hole may not be formed on the light reflecting bowl, the laser beam emitted by the laser source 230 is directly projected onto the second LED light source 210 from other angles, and the fluorescent powder piece is subjected to double-sided excitation by the laser source 230 and the LED chip, so as to further improve the light brightness.

Example 6

As shown in fig. 8, different from embodiment 1, in this embodiment, the third light source group further includes a spherical light reflecting bowl 320, the third light source 310 is located at a center of the spherical light reflecting bowl 320, the spherical light reflecting bowl 320 is provided with a light passing hole 321, the light passing hole 321 may be located in the middle of the top of the spherical light reflecting bowl 320, or may be located at a certain position on the side surface, a part of light emitted from the third light source 310 directly exits from the light passing hole 321 and is projected to the second region of the lens unit 40 to be collimated and emitted, another part of light is reflected by the spherical light reflecting bowl 320 and then enters the light emitting surface of the third light source 310 again to be excited, and the above process is repeated, so that the brightness of the emitted light is greatly improved through multiple excitations.

Example 7

Different from embodiment 1, the third light source group further includes an optical focusing component 330, and light emitted from the third light source 310 is converged at a focal point of the second region after passing through the optical focusing component 330. The optical focusing element 330 may be a light-reflecting bowl, as shown in fig. 9, in which the third light source 310 is located above the light-reflecting bowl (i.e. on the side away from the central axis of the system) to facilitate heat dissipation, but the optical focusing element 330 may also be a prism with total internal reflection surfaces, as shown in fig. 10, one side of the prism corresponding to the third light source 310 is provided with a concave lens, the third light source 310 is located at the focal point of the concave lens, and the concave lens includes two total internal reflection surfaces, in fig. 10, the light emitted from the third light source 310 is divided into left, middle, right, left, and right light rays, which are refracted and emitted in sequence, the middle light ray is emitted in parallel after passing through the concave lens, and finally the three light rays are focused at the focal point of the second region, and the light rays with a larger angle (greater than 120 °) from the third light source 310 can be collected by the light-reflecting bowl or the prism and focused at the focal point of the second region of the lens unit, the utilization rate of light is improved.

Example 8

Unlike embodiment 1, in this embodiment, the third light source group includes a plurality of third light sources 310, the second region of the lens unit 40 includes a plurality of second lenses 420, and each third light source 310 corresponds to one second lens 420, that is, each third light source 310 is located at the focal point of the corresponding second lens 420, and the emitted light is projected onto the corresponding second lens 420 and collimated. In this embodiment, taking the two third light sources 310 as an example, the lens unit 40 is configured as shown in fig. 11a-11b, the first lens 410 and the second lens 420 have different sizes, the size of the second lens 420 corresponds to the light beam emitted by the third light source group, the outer peripheral profiles of the two second lenses 420 are circular or non-circular and are arranged above the first lens 410 side by side (or alternatively arranged), and the first lens 410 is a non-complete lens, and one end of the first lens, which is adjacent to the second lens 420, is a plane or a curved surface with a groove.

Example 9

As shown in fig. 12 to 13, unlike embodiment 1, in this embodiment, the second region of the lens unit 40 is a plane window 430, and the focal point of the second region can be regarded as being at infinity, the third light source group further comprises an optical collimating element 340 positioned behind the third light source 310, the light emitted from the third light source 310 is collected and collimated by the optical collimating component 340 to form approximately parallel light, and then exits from the planar window 430, the optical collimating element 340 may be a reflector, as shown in fig. 12, and the third light source 310 is located above the reflector (i.e., on the side away from the central axis of the system), so as to dissipate heat, of course, the optical collimating element 340 may also be a collimating lens, as shown in fig. 13, a light reflecting bowl and a collimating lens are adopted to collect the light rays with a larger angle from the third light source 310 and then emit the light rays in parallel, so as to improve the utilization rate of the light rays.

Although the embodiments of the present invention have been described in the specification, these embodiments are merely provided as a hint, and should not limit the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention and are intended to be within the scope of the invention.

Claims

1. A lighting fixture, comprising:

a third light source group including at least one third light source;

2. The lighting fixture of claim 1, wherein the light path turning member is a reflector comprising two reflecting surfaces, a first reflecting surface being a curved reflecting surface and a second reflecting surface being a flat reflecting surface.

3. The lighting fixture of claim 1, wherein the light path turning member comprises a curved reflector and a planar reflector, the planar reflector corresponds to the light outlet of the curved reflector, and the light emitted from the second LED light source is reflected by the curved reflector and the planar reflector in sequence and then converged to the focus of the second region of the lens unit.

4. The lighting fixture of claim 1, wherein the optical path turning member comprises a curved reflector and a right-angle prism, one of the right-angle sides of the right-angle prism corresponds to the light outlet of the curved reflector, and the inclined surface of the right-angle prism is a total internal reflection surface.

5. The lighting fixture of claim 1, wherein the second light source group comprises at least two second LED light sources, and each of the second LED light sources corresponds to one of the light path-turning members.

6. The lighting fixture of claim 1, wherein the first region of the lens unit comprises a first lens, the second region comprises at least one second lens, the second lens corresponds to a third light source one-to-one, and light emitted from the third light source is collected and collimated by the second lens and then emitted.

7. The lighting fixture of claim 1, wherein the third light source group further comprises an optical focusing component, and light emitted from the third light source passes through the optical focusing component and then converges at a focal point of the second region.

8. The light fixture of claim 1 wherein the second region of the lens unit is a planar window, the third light source group further comprising an optical collimating element located behind the third light source, wherein light from the third light source is collected and collimated by the optical collimating element and exits the planar window.

9. The light fixture of claim 1 wherein the light emitted by the third light source is a different color than the light emitted by the second LED light source.

10. The light fixture of claim 1, wherein the second set of LED light sources further comprises a laser source, wherein light from the laser source is projected onto one of the second LED light sources.

11. The lighting fixture of claim 1, wherein the third light source is one or more of a laser light source, an LED light source, or a combination thereof.

12. The lighting fixture of claim 1, further comprising heat-dissipating substrates corresponding to the first, second, and third LED light sources, respectively.