WO2015196671A1

WO2015196671A1 - Lighting and optical module thereof

Info

Publication number: WO2015196671A1
Application number: PCT/CN2014/089408
Authority: WO
Inventors: 祝文雪; 邓诗涛
Original assignee: 欧普照明股份有限公司
Priority date: 2014-06-26
Filing date: 2014-10-24
Publication date: 2015-12-30
Also published as: CN105222097A

Abstract

An optical module comprising an LED light source (1) and a lens (2). A light of the LED light source (1) exits via the lens (2). The optical module also comprises a shading component (3), which partly shades the light shone by the LED light source (1) to the edges of a light incidence surface of the lens (2). The edges of light spots of the optical module are sharp. Also provided is a lighting comprising the optical module.

Description

Light fixture and optical module thereof

Technical field

The invention relates to the field of illumination, and in particular to a lamp.

Background technique

At present, some LED lamps on the market require the edge of the spot where the light is emitted to be cut off, that is, the edge of the spot is required to be clear. Compared with the TIR lens, the use of a plano-convex lens or a lenticular lens to distribute light to the LED light source can improve the edge definition of the spot, but still has a large room for improvement. In addition, when the power of the LED lamp is large, the light-emitting surface of the LED light source also increases, especially the use of the COB light source, which will reduce the edge definition of the emitted light.

Summary of the invention

The technical problem to be solved by the present invention is to provide an optical module.

In order to solve the above technical problem, the optical module of the present invention includes an LED light source and a lens, the light of the LED light source is emitted through the lens, and the optical module further includes a light shielding member that at least partially blocks the LED The light source is directed at the light at the edge of the entrance face of the lens.

Preferably, the light shielding member is provided with a light shielding surface surrounding the LED light source, and the light shielding surface at least partially blocks the light of the LED light source from entering the edge of the light incident surface of the lens.

Preferably, the angle between the light shielding surface and the optical axis of the LED light source is E, 30° ≤ E ≤ 60°.

Preferably, the light shielding member is made of a plastic that is opaque to light.

Preferably, the light shielding member is provided with a support portion for supporting the lens.

Preferably, the support portion extends from an edge of the light shielding member in a direction away from the LED light source.

Preferably, the lens is a lenticular lens.

Preferably, the LED light source is a COB light source.

The invention also provides a light fixture comprising the optical module of any of the preceding claims.

By providing the light shielding member, the sharpness of the edge of the exit spot of the luminaire can be significantly improved.

DRAWINGS

1 is a perspective view of an optical module of the present invention;

Figure 2 is a cross-sectional view of the optical module of Figure 1;

Figure 3 is an enlarged view of a portion X of Figure 2;

Figure 4 is a schematic view of a light shielding member;

Figure 5 is a schematic illustration of a lens.

detailed description

An embodiment of the optical module of the present invention will be described in detail below with reference to FIGS. 1 through 5. The optical module of this embodiment includes an LED light source 1 and a lens 2, and the light of the LED light source 1 is emitted through the lens 2. The optical module further includes a light shielding member 3 that at least partially blocks light from the LED light source 1 toward the edge of the light incident surface 21 of the lens 2. The light shielding member 3 is provided with a light shielding surface 31 surrounding the LED light source 1 , and the light shielding surface 31 at least partially blocks the light emitted by the LED light source 1 toward the edge of the light incident surface 21 of the lens 2 . In the present embodiment, the light shielding member 3 includes a tapered wall 37 which is an inner surface of the tapered wall 37. Since the edge of the light incident surface 21 of the lens 2 can only receive the light emitted by the partial light emitting surface of the LED light source 1, the light spot formed by the light passing through the edge of the light incident surface 21 becomes small, thereby The edge definition of the entire spot of the optical module is improved. In the embodiment, the light shielding member 3 includes a flat portion and a downwardly recessed portion formed in a central portion of the flat portion. The outer wall surface of the downwardly recessed portion is the light shielding surface 31. As shown in FIG. 2, in the present embodiment, the straight line a is a straight line passing through the edge point F of the light incident surface of the lens 2 and the upper edge of the light shielding surface 31; the straight line b is the entrance through the lens 2 A line point D of the smooth surface and a straight line of the upper edge of the light shielding surface 31. The intersection of the straight line a and the straight line b with the light-emitting surface of the LED light source 1 is A and B, respectively. The light of the circular area c with the diameter AB of the light-emitting surface of the LED light source 1 cannot be irradiated to the edge of the light-incident surface of the lens 2, that is, the light-shielding surface 31 blocks the light in the circular area c, so that the light in the circular area c is blocked. This portion of the light cannot be incident on the edge of the light incident surface 21 of the lens 2. Since the edge of the light incident surface 21 of the lens 2 can only receive the light emitted by the partial light emitting surface of the LED light source 1, the light spot formed by the light passing through the edge of the light incident surface 21 becomes small, thereby The edge definition of the entire spot of the optical module is improved. The angle between the light shielding surface 31 and the optical axis of the LED light source 1 is E. As shown in FIG. 3, the straight line d is a straight line parallel to the optical axis of the LED light source 1, and between the straight line d and the light shielding surface 31. The angle E is the angle between the light shielding surface 31 and the LED light source 1. When the angle of the angle E increases, the sharpness of the spot increases, but the light effect of the optical module is lowered. When the angle E<30°, the optical module has a higher light efficiency, but the spot is bright. The edge is not clear enough; when E>60°, the edge definition of the spot is higher, but the optical efficiency of the optical module is lower, which can not meet the requirements well. When 30°≤E≤60°, the edge of the spot of the optical module is clearer, and the optical module has higher light efficiency, that is, a better balance between the edge definition of the spot and the light effect. In this embodiment, E = 45°. It should be particularly noted that in FIG. 2, the vertical center line of the light emitting surface of the LED light source 1 is the optical axis of the LED light source 1. The light-shielding member 3 is made of an insulating opaque material, for example, made of an opaque plastic. The light shielding member 3 is provided with a support portion 32 for supporting the lens 2. In this embodiment, the support portion 32 extends from the edge of the light shielding member 3 away from the LED light source 1 and is an annular vertical wall. By providing the support portion 32, it is possible to conveniently control the distance between the LED light source 1 and the lens 2. The light shielding member 3 further includes a connecting portion 39 having a flat shape, and the connecting portion 39 connects the tapered wall 37 and the support portion 32. The lens 2 is a lenticular lens, that is, the light entering the lens 2 Both the face 21 and the light exit face 22 are convex. The LED light source 1 is a COB light source. An annular bracket 29 having an L-shaped cross section is further provided at one end of the light incident surface 21 of the lens 2. The annular bracket 29 can be made of plastic, and the annular bracket 29 can be bonded and the lens 2 connection. The lens 2 is mounted on the support portion 32 by an annular bracket 29 which can be coupled to the support portion 32 by snapping or screwing.

As a simple modification of the above embodiment, the lens 2 may also be a plano-convex lens, that is, the light incident surface 21 of the lens 2 is a flat surface, and the light exit surface 22 is a convex surface.

As a simple variant of the above embodiment, the included angle E may also be 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42. °, 43°, 44°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59° or 60°.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the equivalents and modifications of the present invention are covered by the scope of the claims of the present invention. Let's take another example.

Claims

An optical module, comprising: an LED light source and a lens, wherein the light of the LED light source is emitted through the lens, the optical module further comprises a light shielding component, the light shielding component is at least partially blocked The LED light source is directed toward the light incident on the edge of the entrance face of the lens.
The optical module according to claim 1, wherein the light shielding member is provided with a light shielding surface surrounding the LED light source, and the light shielding surface at least partially blocks the LED light source from entering the light incident surface of the lens The light at the edges.
The optical module according to claim 2, wherein an angle between the light shielding surface and an optical axis of the LED light source is E, 30° ≤ E ≤ 60°.
The optical module according to claim 2, wherein the light shielding member is made of a plastic that is opaque to light.
The optical module according to claim 1, wherein the light shielding member is provided with a support portion for supporting the lens.
The optical module according to claim 5, wherein the support portion extends from an edge of the light shielding member in a direction away from the LED light source.
The optical module of claim 1 wherein said lens is a lenticular lens.
The optical module according to claim 1, wherein said lens is flat and convex mirror.
The optical module of claim 1 wherein said LED source is a COB source.
A luminaire, characterized in that the luminaire comprises the optical module according to any one of claims 1-9.