WO2021127838A1

WO2021127838A1 - Anti-dazzle lens unit and led light source system

Info

Publication number: WO2021127838A1
Application number: PCT/CN2019/127389
Authority: WO
Inventors: 赵海天; 张兵
Original assignee: 深圳大学
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2021-07-01
Also published as: CN114746921A

Abstract

An anti-dazzle lens unit (30) and an LED light source system (100) comprising the anti-dazzle lens unit (30). The anti-dazzle lens unit (30) comprises: a condensing lens (40), used for condensing and emitting light; and a light split lens assembly (50), which is formed on the light emitting side of the condensing lens (40), is provided with light emitting surfaces in at least two light emitting directions, and is used for changing the direction of the light emitted by the condensing lens (40) to enable the light to emit along at least two predetermined light emitting directions.

Description

Anti-glare lens unit and LED light source system

Technical field

This application relates to the field of semiconductor lighting, and in particular to an anti-glare lens unit and an LED light source system including the anti-glare lens unit.

Background technique

In the existing LED light source system, in addition to the light directly projected from the light-emitting surface, some of the light is transmitted from the peripheral side of the light-emitting surface, which is prone to dazzling glare, which may interfere with vision and even cause discomfort. And easily cause visual fatigue.

Summary of the invention

The anti-glare lens unit and the LED light source system including the anti-glare lens unit disclosed in the embodiments of the present application change the direction of the emitted light and emit it along the light emitting surface in at least two predetermined directions, thereby preventing glare interference.

An anti-glare lens unit comprising: a condenser lens for condensing and emitting light; and a dichroic lens assembly, the dichroic lens assembly is formed on the light exit side of the condenser lens, and the dichroic lens assembly is at least two A light-emitting surface is provided in each light-emitting direction, and the light splitting lens assembly is used to change the direction of the light emitted from the condenser lens and then emit it along at least two predetermined light-emitting directions.

In an embodiment, the beam splitter lens assembly includes a first light emitting surface and a second light emitting surface, a first reflecting surface and a second reflecting surface; part of the light emitted from the condenser lens passes through the first reflecting surface. After being reflected, it exits from the first light exit surface, and another part of the light exiting from the condenser lens exits from the second light exit surface after being reflected by the second reflective surface.

In an embodiment, the first light-emitting surface and the second light-emitting surface are arranged parallel and opposite to each other, and the extension direction of the first light-emitting surface and the second light-emitting surface is the same as the light-emitting direction of the condenser lens the same.

In an embodiment, the spectroscopic lens assembly includes a first spectroscopic lens and a second spectroscopic lens that are opposed to each other; the first spectroscopic lens is in the shape of a triangular prism, and the first reflective surface and the first light-emitting surface form On the first dichroic lens; the second dichroic lens also has a triangular prism shape, and the second reflecting surface and the second light-emitting surface are formed on the second dichroic lens.

In an embodiment, the spectroscopic lens assembly is an integral structure, including a light-emitting surface and a reflective surface; wherein, the reflective surface is a conical surface, and the conical tip of the reflective surface is disposed toward the condenser lens; The light exit surface surrounds the reflective surface; the light emitted from the condenser lens is reflected by the reflective surface and then exits in a ring shape from the light exit surface.

In an embodiment, it further includes a serrated lens formed on the light exit surface; the serrated lens is used to adjust the direction of the light emitted from the light exit surface.

In an embodiment, the condensing lens includes: a lens body having opposite upper and lower surfaces and an outer peripheral surface, the outer peripheral surface of the lens body is a total reflection surface; a first concave structure, The first concave structure is formed by concave inwardly in the middle of the lower surface of the lens body, the first concave structure includes a first arc-shaped bottom surface; and a second concave structure, the second concave The structure is formed by concave inwardly in the middle of the upper surface of the lens body, and the second concave structure includes a second arc-shaped bottom surface; wherein, between the first arc-shaped bottom surface and the second arc-shaped bottom surface The lens body forms a double-convex lens; wherein the light incident from the first arc-shaped bottom surface is collimated by the double-convex lens and exits from the second arc-shaped bottom surface; from the side surface of the first concave structure The light incident to the lens body exits the upper surface of the lens body after being reflected by the total reflection surface.

In one embodiment, the outer peripheral surface of the lens body is a conical-like surface formed by a plurality of planes connected and enclosed; the side surfaces of the first concave structure and the second concave structure are cylindrical or drawn out. Cone surface.

An LED light source system includes a substrate, an LED chip formed on the substrate, and the aforementioned anti-glare lens unit arranged above the light-emitting surface of the LED chip; wherein the light emitted by the LED chip passes through the The condensing lens is condensed and emitted to the beam splitting lens assembly, and the beam splitting lens assembly changes the direction and then emits along at least two predetermined light emitting directions.

The anti-glare lens unit and the LED light source system including the anti-glare lens unit of the present application change the direction of the emitted light and emit it along at least two predetermined light emission directions, thereby preventing glare interference.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. A person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic cross-sectional view of an LED light source system provided by the first embodiment of the application.

2 is a schematic diagram of a light splitting optical path of a light splitting lens assembly of an anti-glare lens unit of an LED light source system according to the first embodiment of the application.

FIG. 3 is a three-dimensional schematic diagram of the anti-glare lens unit provided by the first embodiment of the application.

FIG. 4 is a three-dimensional schematic diagram of the anti-glare lens unit provided by the first embodiment of the application from another viewing angle.

FIG. 5 is a schematic side view of the anti-glare lens unit provided by the first embodiment of the application.

FIG. 6 is a schematic bottom view of the anti-glare lens unit provided by the first embodiment of the application.

FIG. 7 is a schematic top view of the anti-glare lens unit provided by the first embodiment of the application.

FIG. 8 is a schematic cross-sectional view of the LED light source system provided by the second embodiment of the application.

FIG. 9 is a schematic top view of the LED light source system provided by the second embodiment of the application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

Please refer to FIG. 1 to FIG. 8, which are schematic diagrams of an LED light source system provided by the first embodiment of this application. The LED light source system 100 includes a substrate 10, an LED chip 20 formed on the substrate 10, and an anti-glare lens unit 30 disposed above the light-emitting surface of the LED chip 20.

The anti-glare lens unit 30 includes a condenser lens 40 and a dichroic lens assembly 50; the condenser lens 40 is used to converge the light emitted by the LED chip 20 and then exit; the dichroic lens assembly 50 is formed on the condenser lens 40. On the light exit side of the light lens 40, the light splitting lens assembly 50 is provided with light exit surfaces in at least two light exit directions, and the light splitting lens assembly 50 is used to change the direction of the light emitted from the condensing lens 40 and follow at least two light exiting surfaces. A predetermined light emission direction is emitted.

In this embodiment, as shown in FIG. 1, the condenser lens 40 includes a lens body 41, a first concave structure 42 and a second concave structure 43.

The lens body 41 includes an upper surface 411 and a lower surface 412 opposite to each other, and an outer peripheral surface 413 surrounding the lens body 41. The outer peripheral surface 413 of the lens body 41 is a total reflection surface. The lens body 41 as a whole may be in the shape of a truncated cone, truncated truncated cone, cone, cone-like shape, etc., that is, the outer peripheral surface 413 may be a truncated cone surface, a truncated cone surface, a conical surface, a cone-like surface, and the like. For example, the outer peripheral surface 413 of the lens body 41 is a conical-like surface formed by a plurality of planes connected and enclosed. In this embodiment, the entire outer peripheral surface 413 of the lens body 41 is a conical-like surface formed by a plurality of triangular planes connected and enclosed.

In this embodiment, as shown in FIGS. 3, 5, and 6, the large-size end of the outer peripheral surface 413 further includes two cross-sections 4131, and the two cross-sections 4131 extend from the upper surface 411 to the lower surface. The surface 412 extends in the direction, and the two cross sections 4131 are opposed to each other and are parallel to the axial direction of the outer peripheral surface 413; the two cross sections 4131 are used to adjust the light output of the condenser lens 40 to a preset range. Of course, in other embodiments, the cross section 4131 may not be formed.

The first concave structure 42 is formed by concave inwardly from the middle of the lower surface 412 of the lens body 41. The first concave structure 42 includes a first bottom surface 421 and a first side surface 422. The first bottom surface 421 may be a flat surface or an arc surface; the first side surface 422 may be a draft cone surface, a cylindrical surface, or the like. In this embodiment, the first bottom surface 421 is an arc-shaped bottom surface, and the first bottom surface 421 protrudes toward the LED chip 20; the first side surface 422 is a cylindrical surface.

The second recessed structure 43 is formed by recessing the middle portion of the upper surface 411 of the lens body 41 toward the inside. The second recessed structure 43 includes a second bottom surface 431 and a second side surface 432. The second bottom surface 431 may be a flat surface or an arc surface; the second side surface 432 may be a draft cone surface, a cylindrical surface, or the like. In this embodiment, the second bottom surface 431 is an arc-shaped bottom surface, and the second bottom surface 431 protrudes away from the LED chip 20; the second side surface 432 is a cylindrical surface. The lens body 41 between the first bottom surface 421 and the second bottom surface 431 forms a biconvex lens 44.

The light incident from the first bottom surface 421 is collimated by the lenticular lens 44 and then exits the second bottom surface 431; from the first side surface 432 of the first concave structure 43, it enters the lens body The light beam 41 exits from the upper surface 411 of the lens body 41 after being reflected by the outer peripheral surface 413.

It can be understood that the exit surface of the condenser lens 40 may include the upper surface 411 and the second bottom surface 431.

In this embodiment, the dichroic lens assembly 50 includes a first dichroic lens 51 and a second dichroic lens 52. The first dichroic lens 51 and the second dichroic lens 52 both have a triangular prism shape. The first dichroic lens 51 includes a first reflective surface 512 arranged obliquely with respect to the upper surface 411 and a first light-emitting surface 513 obliquely connected to the first reflective surface 512 and perpendicular to the upper surface 411. The second dichroic lens 52 includes a second reflection surface 522 obliquely arranged with respect to the upper surface 411 and a second light-emitting surface 523 obliquely connected to the second reflection surface 522 and perpendicular to the upper surface 411. The first light-emitting surface 513 and the second light-emitting surface 523 are disposed opposite to each other, and the first reflective surface 512 and the second reflective surface 522 are also disposed opposite to each other. As shown in FIG. 2, part of the light emitted from the exit surface of the condenser lens 40 exits from the first light exit surface 513 after being reflected by the first reflective surface 512, and another part of the light exits from the condenser lens 40. The light emitted from the emitting surface of the lens 40 is reflected by the second reflecting surface 522 and then emitted from the second light emitting surface 523.

Wherein, in this embodiment, the first reflecting surface 512 and the second reflecting surface 522 are connected at a position flush with the upper surface 411, and the size of the first dichroic lens 51 and the second dichroic lens 52 are The same and are arranged symmetrically with respect to the optical axis of the condenser lens 40, so that the light output of the first dichroic lens 51 and the second dichroic lens 52 are substantially the same. Of course, in other embodiments, the positions of the first dichroic lens 51 and the second dichroic lens 52 can also be adjusted so that the proportions of the light output of the first dichroic lens 51 and the second dichroic lens 52 can also be different.

In this embodiment, the spectroscopic lens assembly 50 has two light-emitting surfaces, namely the first light-emitting surface 513 and the second light-emitting surface 523, and the light-emitting directions of the first light-emitting surface 513 and the second light-emitting surface 523 in contrast.

In this embodiment, the first light-emitting surface 513 and the second light-emitting surface 523 are parallel, and the first light-emitting surface 513 and the second light-emitting surface 523 are parallel to the optical axis of the condenser lens 40 The first reflective surface 512 and the first light-emitting surface 513 are at an angle of 45 degrees; the second reflective surface 522 and the second light-emitting surface 523 are at an angle of 45 degrees.

In this embodiment, the first light-emitting surface 513 and the cross-section 4131 on the same side are located on the same plane, and the second light-emitting surface 523 is located on the same plane as the cross-section 4131 on the same side; of course, in other implementations In the example, it is not limited to the above settings.

In other embodiments, the first light-emitting surface 513 and the second light-emitting surface 523 may also be arranged at an oblique angle; the extension direction of the first light-emitting surface 513 and the second light-emitting surface 523 is the same as that of the The light-emitting direction of the condenser lens 40 may also be different; the angle between the first reflective surface 512 and the first light-emitting surface 513 may also be other angles, such as 30 degrees, 60 degrees, etc., the second The included angle between the reflective surface 522 and the second light-emitting surface 523 can also be other angles, such as 30 degrees, 60 degrees, etc., wherein the setting of the included angle can be set according to the required light-emitting angle. I won't repeat it here.

The anti-glare lens unit 30 may further include a diffusing element 60 formed on the light exit surface of the spectroscopic lens assembly 50, and the diffusing element 60 is used to adjust the direction of light emitted from the light exit surface of the spectroscopic lens assembly 50, For example, the light emitted from the light-emitting surface of the spectroscopic lens assembly 50 can be diffused to form a large-area illuminating light. The diffusion element 60 may be, for example, a plurality of microstructures, or may be a serrated lens, etc., for example.

In this embodiment, as shown in FIGS. 3 to 7, the diffusion element 60 includes a first serrated lens 61 and a second serrated lens 62. The first serrated lens 61 is formed on the first light exit surface 513, and the first serrated lens 61 is used to adjust the direction of the light emitted from the first light exit surface 513. The second serrated lens 62 is formed on the second light exit surface 523, and the second serrated lens 62 is used to adjust the direction of the light emitted from the second light exit surface 523.

The first serrated lens 61 includes a plurality of first serrations 611, and each of the first serrations 611 includes a first surface 612 and a second surface 613. The first surface 612 is formed from the first light-emitting surface 513. A plane extending vertically, the second surface 613 obliquely connects the first light-emitting surface 513 and the end of the first surface 612 away from the first light-emitting surface 513; the second serrated lens 62 includes a plurality of Two saw teeth 621, each of the second saw teeth 621 includes a third surface 622 and a fourth surface 623, the third surface 622 is a plane extending perpendicularly from the second light-emitting surface 523, and the fourth surface 623 The end portions of the second light-emitting surface 523 and the third surface 622 away from the second light-emitting surface 523 are connected obliquely.

Wherein, the second surface 613 and the fourth surface 623 may both be flat or curved; in this embodiment, the second surface 613 and the fourth surface 623 are both flat.

The anti-glare lens unit 30 in the LED light source system 100 of this embodiment changes the direction of the light emitted by the condenser lens 40 and then emits it in two predetermined directions, thereby avoiding glare interference; and, the LED light source system 100 of this embodiment The anti-glare lens unit 30 in can obtain the emitted light at a required angle.

Please refer to FIGS. 8-9, which are schematic cross-sectional views of an LED light source system 100a according to a second embodiment of this application; the LED light source system 100a of this embodiment is substantially the same as the LED light source system 100 of the first embodiment. The difference is: in this embodiment, the spectroscopic lens assembly 50 is an integrated structure, which includes a light-emitting surface 501 and a reflective surface 502; wherein, the reflective surface 502 is a conical surface, and the conical tip of the reflective surface 502 faces The condenser lens 40 is provided; the light exit surface 501 is provided around the reflective surface 502; the light emitted from the condenser lens 40 is reflected by the reflective surface 502 and then exits in a ring shape from the light exit surface 501 .

In this embodiment, the light-emitting surface 501 is a cylindrical surface, and the axis of the cylinder where the light-emitting surface 501 is located is the same as the light-emitting direction of the condensing lens 40, that is, the light-emitting surface 501 and the condensing lens 40 The upper surface 411 of the lens 40 is vertical.

In other embodiments, the light-emitting surface 501 may also be a surface of other shapes, such as a draft cone surface, etc., and the light-emitting surface 501 and the upper surface 411 of the condenser lens 40 may form an oblique angle.

The cone angle of the reflecting surface 502 can be set as required, for example, it can be 30 degrees, 45 degrees, 60 degrees, and so on.

Wherein, in this embodiment, the LED light source system 100a may also include a diffusing element (not shown in the figure), which may be, for example, a serrated lens surrounding the light emitting surface 501.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

The embodiments of the application are described in detail above, and specific examples are used in this article to illustrate the principles and embodiments of the application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the application; at the same time, for Those of ordinary skill in the art, based on the ideas of the present application, will have changes in the specific embodiments and the scope of application. In summary, the content of this specification should not be construed as limiting the present application.

Claims

An anti-glare lens unit, characterized in that it comprises:

Condenser lens, used to converge and emit light; and

Spectroscopic lens assembly, the spectroscopic lens assembly is formed on the light-emitting side of the condenser lens, the spectroscopic lens assembly is provided with light-emitting surfaces in at least two light-emitting directions, and the spectroscopic lens assembly is used to collect light from the condensing lens. The light emitted by the lens changes direction and then exits along at least two predetermined light-emitting directions.
The anti-glare lens unit according to claim 1, wherein the beam splitting lens assembly includes a first light emitting surface and a second light emitting surface, a first reflecting surface and a second reflecting surface; part of the light emitting surface is emitted from the condensing lens After being reflected by the first reflective surface, the light from the light exits the first light exit surface, and another part of the light from the condenser lens exits from the second light exit surface after being reflected by the second reflective surface.
2. The anti-glare lens unit of claim 2, wherein the first light-emitting surface and the second light-emitting surface are parallel and opposite to each other, and the first light-emitting surface and the second light-emitting surface extend The direction is the same as the light-emitting direction of the condenser lens.
8. The anti-glare lens unit of claim 3, wherein the beam splitting lens assembly comprises a first beam splitting lens and a second beam splitting lens arranged opposite; the first beam splitting lens is in the shape of a triangular prism, and the first beam splitting lens is in the shape of a triangular prism. The reflecting surface and the first light-emitting surface are formed on the first dichroic lens; the second dichroic lens is also in the shape of a triangular prism, and the second reflecting surface and the second light-emitting surface are formed on the second dichroic lens. On the spectroscopic lens.
The anti-glare lens unit of claim 1, wherein the beam splitter lens assembly is an integral structure, including a light-emitting surface and a reflective surface; wherein the reflective surface is a conical surface, and the conical tip of the reflective surface It is arranged toward the condenser lens; the light exit surface surrounds the reflective surface; the light emitted from the condenser lens is reflected by the reflective surface and then exits in a ring shape from the light exit surface.
The anti-glare lens unit according to claim 5, wherein the light-emitting surface is a cylindrical surface or a draft cone surface.
5. The anti-glare lens unit according to claim 1, further comprising a serrated lens formed on the light exit surface; the serrated lens is used to adjust the direction of the light emitted from the light exit surface.
The anti-glare lens unit of claim 1, wherein the condenser lens comprises:

A lens body, the lens body having opposite upper and lower surfaces and an outer peripheral surface, and the outer peripheral surface of the lens body is a total reflection surface;

A first concave structure, the first concave structure is formed by concave inwardly from the middle of the lower surface of the lens body, the first concave structure includes a first arc-shaped bottom surface; and

A second concave structure, the second concave structure is formed by concave inwardly from the middle of the upper surface of the lens body, and the second concave structure includes a second arc-shaped bottom surface;

Wherein, the lens body between the first arc-shaped bottom surface and the second arc-shaped bottom surface forms a biconvex lens;

Wherein, the light incident from the first arc-shaped bottom surface is collimated by the lenticular lens and exits from the second arc-shaped bottom surface; the light entering the lens body from the side surface of the first concave structure, After being reflected by the total reflection surface, it exits from the upper surface of the lens body.
The anti-glare lens unit according to claim 7, wherein the outer peripheral surface of the lens body is a conical surface formed by a plurality of planes connected and enclosed; the first concave structure and the second concave structure The side surface of the concave structure is a cylindrical surface or a draft cone surface.
An LED light source system, characterized by comprising a substrate, an LED chip formed on the substrate, and the anti-glare lens unit according to any one of claims 1 to 9 arranged above the light-emitting surface of the LED chip; Wherein, the light emitted by the LED chip is condensed by the condensing lens and then emitted to the dichroic lens assembly, and the dichroic lens assembly is changed in direction and then emitted along at least two predetermined light emission directions.