WO2022121983A1

WO2022121983A1 - Downlight

Info

Publication number: WO2022121983A1
Application number: PCT/CN2021/136783
Authority: WO
Inventors: 卜晨曦
Original assignee: 苏州欧普照明有限公司; 欧普照明股份有限公司
Priority date: 2020-12-11
Filing date: 2021-12-09
Publication date: 2022-06-16
Also published as: CN214038087U

Abstract

A downlight. The downlight comprises: a light source assembly (100) and an optical mask (200), wherein the optical mask (200) is arranged on one side of the light source assembly (100), the optical mask (200) is made of a transparent material and is provided with a light incident face (210) and a light emergent face (220), which are located at two axial ends of the optical mask (200) and arranged opposite one another, light emitted from the light source assembly (100) enters the optical mask (200) from the light incident face (210) and penetrates out of the optical mask (200) from the light emergent face (220), and a portion of the emergent face (220) of the optical mask (200) close to an edge of the optical mask (200) is inclined towards the light incident face (210) in a process of extending towards the edge of the optical mask (200), such that a beam angle of the light emitted from the light source assembly (100) is reduced after the light penetrates the edge of the optical mask (200).

Description

downlight

technical field

The present application relates to the field of lamps, in particular to a downlight.

Background technique

In the design of downlights, in order to solve the problem of light mixing of multiple lamp beads, the traditional way is to use a diffuser plate to mix light. The advantage of this method is that the light mixing is relatively uniform, but due to the low transmittance of the diffuser, some light is reflected back to the optical cavity, and then reflected through the optical cavity and then exits through the diffusing mask, and the light will be lost during the back and forth reflection process. More energy, resulting in the optical efficiency of the downlight is only about 75%, it is difficult to meet the new energy efficiency standards.

SUMMARY OF THE INVENTION

The invention provides a downlight, comprising: a light source assembly and an optical mask;

Wherein, the optical mask is arranged on one side of the light source assembly, the optical mask is made of transparent material, and has a light entrance surface and a light exit surface located at opposite axial ends of the optical mask, and the light source assembly The emitted light enters the optical mask from the light incident surface, and passes through the optical mask from the light exit surface;

The light-emitting surface of the optical mask is inclined toward the light-incident surface during the process of extending toward the edge of the optical mask near the edge of the optical mask, so that the light emitted by the light source assembly passes through the edge of the optical mask. The beam angle is reduced.

Further, after the light emitted by the light source assembly passes through the optical mask, the beam angle is 70°-90°.

Further, the light incident surface and the light exit surface are curved surfaces.

Further, the middle area of the light-emitting surface is concave toward the light-incident surface to form an inner concave surface.

Further, the downlight also includes a secondary reflector, the secondary reflector has a light inlet and a light outlet arranged oppositely, the light inlet is connected to the light outlet surface of the optical mask, and the two The inner wall of the stage reflector has a mirror surface.

Further, the secondary reflector has a cylindrical structure, and the inner diameter of the secondary reflector gradually increases in a direction extending from the light inlet to the light outlet.

Further, the light source assembly includes a mounting portion and a light-emitting portion, the light-emitting portion is provided in the mounting portion, the mounting portion has an opening, and the optical mask is provided at the opening, so that the light-emitting portion is The emitted light can pass through the optical mask.

Further, the light-emitting part includes a plurality of lamp beads, the plurality of the lamp beads are arranged in the installation part in a distributed manner, and the lamp beads are SMD-LED lamp beads.

Further, the surface of the optical mask has light mixing lines.

Further, the light mixing pattern is a plurality of annular patterns arranged around the center of the optical mask or a plurality of compound eye structure patterns discretely distributed on the surface of the optical mask, and the plurality of annular patterns are along the path of the optical mask. To extend settings.

Compared with the prior art, the beneficial effects of the present invention are as follows:

The optical mask in this application has the function of constraining the beam angle of the light passing through the optical mask. Since the light-emitting surface of the optical mask near the edge of the optical mask is inclined to the light-incident surface, the light passing through the edge of the optical mask can be directed toward the middle of the optical mask. The area is bent to effectively prevent glare from light passing through the optical mask. Since the optical mask is made of transparent materials, the loss of light in the process of passing through the optical mask is small, which can effectively improve the optical efficiency of the optical mask.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

Fig. 1 is a schematic diagram according to an embodiment of the present application;

2 is a schematic top view of the light source assembly of the present application;

Fig. 3 is the schematic diagram that the mixed light pattern of the present application is annular pattern;

FIG. 4 is a schematic diagram of the light-mixing pattern of the present application in the form of a dot-like pattern.

Description of reference numbers:

100-light source assembly, 110-installation part, 111-opening, 120-light-emitting part, 121-lamp beads;

200-optical mask, 210-light entrance surface, 220-light exit surface, 230-inner concave surface, 240-light mixing texture;

300 - secondary reflector, 310 - light outlet.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Figure 1 schematically shows a downlight according to one embodiment of the present application. The whole body includes a light source assembly 100 and an optical mask 200 , the light source assembly 100 can emit light, the optical mask 200 is disposed on one side of the light source assembly 100 , and the light emitted by the light source assembly 100 can pass through the optical mask 200 . The optical mask 200 is made of transparent material. Correspondingly, the loss of the light emitted by the light source assembly 100 after passing through the optical mask 200 is relatively small, thereby effectively improving the illumination intensity of the downlight in this embodiment.

The two axial ends of the optical mask 200 have oppositely arranged light incident surfaces 210 and light exit surfaces 220 . The light-emitting surface 220 of the optical mask 200 near the edge of the optical mask 200 is inclined toward the light-incident surface 210 during the process of extending toward the edge of the optical mask 200 , that is, the light-emitting surface 220 of the optical mask 200 near its edge is inclined toward the light-incident surface 210 It is set so that the beam angle of the light emitted by the light source assembly 100 decreases after passing through the edge of the optical mask 200 . The optical mask 200 has the function of constraining the beam angle of the light passing through the optical mask 200. Since the light exit surface 220 near the edge of the optical mask 200 is inclined toward the light entrance surface 210, the structure can direct the light passing through the edge of the optical mask 200 to the light entrance surface 210. The middle area of the optical mask 200 is bent, so as to effectively prevent the light from passing through the optical mask 200 to generate glare.

In one embodiment, after the light emitted by the light source assembly 100 passes through the optical mask 200, the beam angle is 70°-90°, and within this angle range, the light can effectively avoid the generation of glare.

In one embodiment, both the light incident surface 210 and the light exit surface 220 can be set as curved surfaces, and the transition of the curved surfaces is smoother. Correspondingly, when the light exit surface 220 is close to the edge of the optical mask 200 , the curved surface transitions to the edge of the optical mask 200 . It is worth noting that the light emitting surface 220 can also be set as an inclined surface or a multi-segment inclined surface, and the light emitting surface 220 extends toward the edge of the optical mask 200 as an inclined plane or a multi-segment inclined plane. This arrangement can also make the light exit surface 220 face the light incident surface 210. The purpose of the tilt setting.

The light incident surface 210 may be set as a curved surface concave toward the light exit surface 220 , which can reduce the overall thickness of the optical mask 200 .

In one embodiment, the middle region of the light-emitting surface 220 is concave toward the light-incident surface 210 to form the inner concave surface 230 , so the central region of the optical mask 200 extends toward the region close to the edge of the optical mask 200 , and the light-emitting surface 220 is facing away from the light-incident surface 220 . The direction of the light surface 210 is inclined, so that the light passing through the area can be deflected toward the edge of the optical mask 200, thereby reducing the illumination intensity of the central area of the downlight and improving the illumination uniformity of the downlight.

In one embodiment, the downlight further includes a secondary reflector 300, the secondary reflector 300 has a light inlet and a light outlet 310 arranged oppositely, the light inlet is connected to the light outlet surface 220 of the optical mask 200, and the secondary reflector The inner wall of the reflector 300 has a reflective mirror surface, and the secondary reflector 300 can reflect part of the light extending thereon again, reducing the loss of the light emitted by the light source assembly 100 and improving the illumination intensity of the downlight. The above-mentioned secondary reflector 300 has a cylindrical structure, and the inner diameter of the secondary reflector 300 gradually increases in the direction extending from the light inlet to the light outlet 310 .

In one embodiment, the light source assembly 100 includes a mounting portion 110 and a light-emitting portion 120 , the light-emitting portion 120 is disposed in the mounting portion 110 , the mounting portion 110 has an opening 111 , and the optical mask 200 is disposed at the opening 111 , so that the light-emitting portion 120 The emitted light can pass through the optical mask 200 . The purpose of disposing the mounting portion 110 is to support and install the light-emitting portion 120, and at the same time, the light emitted by the light-emitting portion 120 is restrained in the mounting portion 110 before passing through the optical mask 200, so as to reduce the loss of light.

In one embodiment, the light-emitting portion 120 includes a plurality of lamp beads 121 , and the plurality of lamp beads 121 are disposed in the mounting portion 110 in a distributed manner, and the lamp beads 121 are SMD-LED lamp beads. The arrangement of the plurality of lamp beads 121 can enhance the intensity of the light emitted by the light-emitting part 120, and at the same time, the SMD-LED lamp beads have high energy efficiency ratio and long service life.

In one embodiment, the surface of the optical mask 200 has light-mixing lines 240, and the light-mixing lines 240 may be a plurality of annular lines arranged around the center of the optical mask 200 or a plurality of compound-eye structure lines discretely distributed on the surface of the optical mask 200. Each ring-shaped pattern extends along the radial direction of the optical mask 200 . The purpose of setting the above-mentioned light mixing lines 240 is to block the lamp beads 121 and at the same time avoid problems such as ghosting and uneven superposition of light spots caused by multiple lamp beads 121 . The smooth surface 210 is not limited in this application.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

A downlight, comprising a light source assembly (100) and an optical mask (200);

Wherein, the optical mask (200) is arranged on one side of the light source assembly (100), the optical mask (200) is made of transparent material, and has two axial ends of the optical mask (200) and oppositely arranged The light incident surface (210) and the light exit surface (220) of the light source assembly (100) enter the optical mask (200) through the light incident surface (210), and are emitted from the light exit surface by the light source assembly (100). (220) passing through the optical mask (200);

The light exit surface (220) of the optical mask (200) is inclined toward the light incident surface (210) during the process of extending toward the edge of the optical mask (200) near the edge of the optical mask (200), so that all After the light emitted by the light source assembly (100) passes through the edge of the optical mask (200), the beam angle decreases.
The downlight according to claim 1, wherein the beam angle of the light emitted by the light source assembly (100) after passing through the optical mask (200) is 70°-90°.
The downlight according to claim 1, wherein the light incident surface (210) and the light exit surface (220) are curved surfaces.
The downlight according to claim 3, wherein a central region of the light-emitting surface (220) is concave toward the light-incident surface (210) to form an inner concave surface (230).
The downlight according to claim 1, wherein the downlight further comprises a secondary reflector (300), and the secondary reflector (300) has a light inlet and a light outlet (310) arranged oppositely, so The light inlet is connected to the light exit surface (220) of the optical mask (200), and the inner wall of the secondary reflector (300) has a reflective mirror surface.
The downlight according to claim 5, wherein the secondary reflector (300) is a cylindrical structure, and the secondary reflector (300) extends from the light inlet to the light outlet (310) in a direction The inner diameter gradually increases.
The downlight according to claim 1, wherein the light source assembly (100) comprises a mounting portion (110) and a light-emitting portion (120), and the light-emitting portion (120) is arranged in the mounting portion (110), The mounting part (110) has an opening (111), and the optical mask (200) is disposed at the opening (111), so that the light emitted by the light-emitting part (120) can pass through the optical mask (200).
The downlight according to claim 7, wherein the light-emitting part (120) comprises a plurality of lamp beads (121), and the plurality of the lamp beads (121) are distributed and arranged in the installation part (110), so The lamp beads (121) are SMD-LED lamp beads.
The downlight according to claim 1, wherein the surface of the optical mask (200) has a light-mixing texture (240).
The downlight according to claim 9, wherein the light mixing texture (240) is a plurality of annular textures arranged around the center of the optical mask (200) or a plurality of discretely distributed on the surface of the optical mask (200) The compound eye structure lines, a plurality of the annular lines are extended along the radial direction of the optical mask (200).