CN106500057A - Lens and the light-emitting device with the lens - Google Patents

Abstract

The invention provides a lens, which includes a bottom surface and a light-emitting surface opposite to the bottom surface, and the bottom surface is provided with an accommodating cavity for accommodating a light source. The lens also includes a light incident surface opposite to the receiving cavity, and the light incident surface is opposite to the light output surface. The light incident surface is formed by successively connecting multiple annular curved surfaces. The invention also provides a light emitting device with the lens.

Description

Lens and light-emitting device with the same

technical field

The invention relates to a lens and a light-emitting device with the lens.

Background technique

Due to the ever-changing design of optical components and the various forms of LED light-emitting components, diversified products have been derived. Among them, the lens is used to change the circular light spot emitted by the LED light-emitting element into a long-shaped light spot, focusing and diffusing effects to meet the needs of various products. In the prior art, in order to achieve the effect of light diffusion or convergence, the surface of the lens is designed to be concave or convex.

However, the surface of the existing lens is often a single curved surface. When used for near-field light effects, the lens cannot adjust the light effect path only by its own structure, resulting in uneven brightness and darkness of some spots and poor overall light effect. .

Contents of the invention

In view of this, it is necessary to provide a lens capable of better adjusting the light path and a light emitting device with the lens.

A lens, which includes a bottom surface and a light-emitting surface opposite to the bottom surface, and the bottom surface is provided with an accommodating cavity for accommodating a light source. The lens includes a light-incident surface opposite to the accommodating cavity, and the light-incident surface is set opposite to the light-exit surface. The light incident surface is formed by successively connecting multiple annular curved surfaces.

In the lens and the light-emitting device provided by the present invention, the light-incident surface is formed by connecting multiple annular curved surfaces in sequence, and the light emitted by the light source is refracted and reflected by the multiple annular curved surfaces and then exits the light-emitting surface. Emitted, the light path is adjusted to make the light diverge or converge better.

Description of drawings

Fig. 1 is a cross-sectional view of a lens provided by the first embodiment of the present invention.

Fig. 2 is a cross-sectional view of a lighting device having the lens of Fig. 1 .

Fig. 3 is a cross-sectional view of a lens provided in a second embodiment of the present invention.

Fig. 4 is a cross-sectional view of a lighting device having the lens of Fig. 3 .

Description of main component symbols

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

Please refer to FIG. 1 , the lens 100 provided by the first embodiment of the present invention is basically cylindrical. The lens 100 includes a bottom surface 31 and a light emitting surface 34 opposite to the bottom surface 31 . In this embodiment, the light-emitting surface 34 is flat, which is convenient for cleaning dust and other pollutants falling on the light-emitting surface 34 . The bottom surface 31 defines a receiving cavity 32 for receiving the light source 10 . The lens 100 further includes a light incident surface 33 opposite to the receiving cavity 32 , and the light incident surface 33 is disposed opposite to the light source 10 . The light incident surface 33 is formed by sequentially connecting multiple annular curved surfaces 331 , and the curved surfaces 331 are concave surfaces. In this embodiment, the light incident surface 33 is arranged symmetrically with respect to the central axis of the lens 100 . The inner diameters of the plurality of annular curved surfaces 331 gradually decrease from the bottom surface 31 to the light-emitting surface 34 along the central axis of the lens 100 . The top of the light incident surface 33 is formed with a protrusion 332 protruding toward the bottom surface 31, the protrusion 332 is basically conical, and the protrusion 332 can cause the passing light to form multiple refractions, so the lens 100 can It has a better uniform light effect. The tapered side of the protrusion 332 is concave.

Please refer to FIG. 2 , the light emitting device 200 having the lens 100 according to the first embodiment of the present invention includes the light source 10 , the package board 20 and the lens 100 . The light source 10 is disposed on the packaging board 20 and accommodated in the receiving cavity 32 . The package plate 20 seals the receiving cavity 32 so that the light source 10 is packaged in the receiving cavity 32 . In this embodiment, the light source 10 is an LED light source; the geometric center of the light source 10 is located on the central axis of the lens 100 .

When the light emitting device 200 is working, the light emitted by the light source 10 reaches the light incident surface 33, and the light is refracted and reflected by the light incident surface 33 for many times and then emitted from the light exit surface 34, and the light passes through the light incident surface 33 to realize The effect of light diffusion.

Please refer to FIG. 3 , the lens 300 provided by the second embodiment of the present invention is basically similar to the lens 100 provided by the first embodiment. The lens 300 is substantially cylindrical and includes a bottom surface 51 and a light emitting surface 54 opposite to the bottom surface 51 . In this embodiment, the light-emitting surface 54 is flat, which is convenient for cleaning dust and other pollutants falling on the light-emitting surface 54 . The bottom surface 51 defines a receiving cavity 52 for receiving the light source 10 . The lens 300 also includes a light incident surface 53 opposite to the receiving cavity 52 , and the light incident surface 53 is disposed opposite to the light source 10 . The light incident surface 53 is formed by sequentially connecting multiple annular curved surfaces 531 , and the curved surfaces 531 are convex. In this embodiment, the light incident surface 53 is arranged symmetrically with respect to the central axis of the lens 300 . The inner diameters of the plurality of annular curved surfaces 531 gradually decrease from the bottom surface 51 to the light-emitting surface 54 along the central axis of the lens 300 . A groove 532 recessed toward the light-emitting surface 54 is formed on the top of the light-incident surface 53 . A cross-section of the groove 532 parallel to the central axis of the lens 300 is substantially an isosceles triangle, and a bottom of the cross-section is substantially parallel to the bottom surface 51 .

Referring to FIG. 4 , the present invention provides a light emitting device 400 provided with a lens 300 according to the second embodiment of the present invention. The light emitting device 400 is basically similar to the light emitting device 200 provided in the second embodiment. The light emitting device 400 includes a light source 10 , a packaging board 20 and a lens 300 . The light source 10 is disposed on the packaging board 20 and accommodated in the receiving cavity 52 . The package plate 20 seals the receiving cavity 52 so that the light source 10 is packaged in the receiving cavity 52 . In this embodiment, the light source 10 is an LED light source; the geometric center of the light source 10 is located on the central axis of the lens 300 .

When the light emitting device 400 is working, the light emitted by the light source 10 reaches the light incident surface 53, the light is refracted and reflected by the light incident surface 53 for many times, and then emitted from the light exit surface 54, and the light passes through the light incident surface 53 to realize The effect of light convergence aggregation.

In the lens and the light-emitting device provided by the present invention, the light-incident surface is formed by successively connecting multiple annular curved surfaces, and the light emitted by the light source is refracted and reflected by the multiple annular curved surfaces and then exits the light-emitting surface. Emitted, the light path is adjusted to make the light diverge or converge better.

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (10)

1. a kind of lens, which includes bottom surface and the exiting surface opposite with the bottom surface, and the bottom surface is offered for housing the host cavity of light source, and the lens also include the incidence surface relative with the host cavity；The incidence surface is disposed opposite to each other with the exiting surface, it is characterised in that：The incidence surface is interconnected to form successively by multiple annular surfaces.

2. lens as claimed in claim 1, it is characterised in that：The annular surface is convex surface or concave surface.

3. lens as claimed in claim 1, it is characterised in that：The projection that protrudes towards the bottom surface is formed with the top of the incidence surface, the projection is generally conical shape, the raised taper side is concave surface.

4. lens as claimed in claim 1, it is characterised in that：The internal diameter of the plurality of annular surface successively decreases to the exiting surface from the bottom surface along the central shaft of the lens.

5. lens as claimed in claim 1, it is characterised in that：The lens are in column type substantially, substantially symmetrical about its central axis setting of the incidence surface with regard to the lens.

6. a kind of light-emitting device, it include that light source and the lens described in any one of claim 1-5, the light source are contained in the collecting intracavity.

7. light-emitting device as claimed in claim 6, it is characterised in that：The light-emitting device also includes package board, and the package board is used for the light-source encapsulation in the collecting intracavity, and the light source is arranged in the package board.

8. light-emitting device as claimed in claim 6, it is characterised in that：The light source is oppositely arranged with the incidence surface.

9. light-emitting device as claimed in claim 6, it is characterised in that：The light source is LED light source.

10. light-emitting device as claimed in claim 9, it is characterised in that：The geometric center of the light source is located on the central shaft of the lens.