CN101718414B

CN101718414B - Lens for LED light source

Info

Publication number: CN101718414B
Application number: CN2009102608025A
Authority: CN
Inventors: 霍志民; 梁键珀
Original assignee: TESHU PHOTOELECTRIC TECHNOLOGY (ZHONGSHAN) Co Ltd
Current assignee: TESHU PHOTOELECTRIC TECHNOLOGY (ZHONGSHAN) Co Ltd
Priority date: 2009-12-09
Filing date: 2009-12-09
Publication date: 2011-03-30
Anticipated expiration: 2029-12-09
Also published as: CN101718414A

Abstract

The invention discloses a lens for an LED light source, which comprises a first lens body and a second lens body, wherein the first lens body and the second lens body are integrally formed; center shafts of the first lens body and the second lens body are overlapped; the first lens body is in a cylinder shape and is provided with an incident bottom surface and a reflective side surface, wherein the incident bottom surface is used for leading light rays to enter the first lens body, and the reflective side surface is used for reflecting the light rays in the first lens body; the second lens body is provided with an interior space, wherein the interior space is symmetrical around the center shaft of the second lens body and is provided with an interior reflective surface; the light rays entering from the incident bottom surface of the first lens are reflected by the reflective side surface of the first lens body, and then emitted out of the second lens body by the interior reflective surface. The invention can perform secondary light distribution on the dispersion light rays by an LED to improve the light emitting efficiency of the LED and change the light ray distribution of the LED, and also enable the light source to extend from the base plate, and then the second lens body is a secondary light source with large irradiation area, thus the application field of the LED is widened.

Description

A kind of lens that are used for led light source

Technical field

The present invention relates to a kind of lens, particularly a kind of lens that are used for led light source.

Background technology

LED (light-emitting diode) is widely used as lighting source.Because the special principle of luminosity of LED, make its at the energy that reaches required consumption under the equal brightness situation well below ordinary incandescent lamp, further breakthrough along with key technology, the light efficiency of LED might further improve, surmount the light efficiency of all lighting sources now greatly, tempting prospect is arranged aspect illumination.But because the single power of LED is little, and the light that LED sends is inhomogeneous, need its disperse light of sending be carried out secondary light-distribution with several LED combinations and by optical lens, with the light extraction efficiency that promotes LED, the distribution of light that changes LED; Because the overall dimension of LED is less, need be installed on the substrate simultaneously, be very restricted by the irradiation area of the influence tradition LED of substrate, thereby limit the application of LED.Therefore be necessary to develop a kind of lens that are used for led light source, its disperse light that LED can be sent is carried out secondary light-distribution, can extend out by led light source again, increases the irradiation area of LED.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of lens that are used for led light source, its disperse light that LED can be sent is carried out secondary light-distribution, can extend out by led light source again, increases the irradiation area of LED.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of lens that are used for led light source, it is characterized in that it comprises integrated first lenticular body and second lenticular body, the central shaft of this first lenticular body and second lenticular body overlaps, wherein first lenticular body is cylinder shape, and it has a confession light and enters the incident bottom surface of first lenticular body and supply the mirrored sides of light in the first lenticular body internal reflection; Second lenticular body has an inner space, this inner space is around the central shaft symmetry of this second lenticular body, the inner space has penetrates the internal reflection surface of second lenticular body with this reflection ray after making the light that enters from the first lenticular body incident bottom surface by the reflection of the mirrored sides of first lenticular body, and the summit of this inner space is positioned at the end face of first lenticular body.

As the preferred embodiment of the invention, the incident bottom surface of described first lenticular body is the plane.

As the preferred embodiment of the present invention, described first lenticular body is the cylinder bodily form, and the inner space of described second lenticular body is cone shape, and the bottom surface diameter of this cone shape inner space is more than or equal to the diameter of first lenticular body.

As the improvement of the above-mentioned execution mode of the present invention, the summit of this cone shape inner space is positioned at the end face of first lenticular body.

Second lenticular body of the present invention can adopt the circular arc bodily form.

The invention has the beneficial effects as follows: the present invention organically combines first lenticular body and second lenticular body, and the disperse light that LED sends is carried out secondary light-distribution, with the light extraction efficiency that promotes LED, the distribution of light that changes LED; By first lenticular body light source is extended out from substrate position simultaneously, and light is reflected second lenticular body by the internal reflection surface of second lenticular body, second lenticular body is become have the secondary light source of irradiation area greatly, thus the application of expansion LED.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a schematic perspective view one of the present invention;

Fig. 2 is a schematic perspective view two of the present invention;

Fig. 3 is a profile of the present invention.

Embodiment

Referring to figs. 1 through Fig. 3, shown in the figure embodiment of use preferred for this invention, a kind of lens that are used for led light source that present embodiment provides, comprise integrated first lenticular body 1 and second lenticular body 2, second lenticular body 2 is positioned at the end of first lenticular body 1, and the central shaft of this first lenticular body 1 and second lenticular body 2 overlaps, and is provided with the installation portion 3 that the present invention is fixedly mounted on above the led light source in the bottom sides of first lenticular body 1.

As shown in the figure, wherein, first lenticular body 1 is the cylinder bodily form, and this cylindrical length can determine according to actual needs that certainly, first lenticular body also can be other polygon cylinder body shape, is not described further at this.First lenticular body 1 have one for light enter the incident bottom surface 11 of first lenticular body 1 and for light in the mirrored sides 12 of the first lenticular body internal reflection, in embodiment as shown in the figure, this incident bottom surface 11 is the plane.

Second lenticular body 2 can adopt the circular arc bodily form, also can adopt other shape, second lenticular body 2 has an inner space 21, this inner space 21 is around the central shaft symmetry of this second lenticular body 2, inner space 21 has an internal reflection surface 211, this internal reflection surface 211 can be a fully reflecting surface, after thereby the feasible light that enters from the first lenticular body incident bottom surface is reflected by the mirrored sides of first lenticular body this reflection ray is penetrated second lenticular body, that is to say actual light source---the light that LED sends stretches out, second lenticular body is become have the secondary light source of irradiation area greatly, increase the irradiation area of LED.The inner space of this second lenticular body is equivalent to the tungsten filament in iodine-tungsten lamp or the incandescent lamp, up to luminous effect.

Among the embodiment shown in the figure, the inner space 21 of second lenticular body 2 is cone shape, bottom surface 212 diameters of this cone shape inner space 21 are more than or equal to the diameter of first lenticular body, and the summit of this cone shape inner space 21 can be positioned at the end face of first lenticular body 1, with guarantee through the light of first lenticular body reflection can be all internally reflecting surface reflect second lenticular body.Certainly, the summit of this cone shape inner space 21 also can be positioned at other position of second lenticular body.

Certainly, this inner space also can be other shape, as can adopt bus be in the shape, polygonal pyramid shape etc. of crooked camber line.

Optical principle of the present invention is such: the light that LED sends is incident upon the internal reflection surface of second lenticular body after the reverse side one or many reflection of first lenticular body, through internal reflection surface this reflection ray is penetrated second lenticular body again, thereby the disperse light that LED sends is carried out secondary light-distribution, with the light extraction efficiency that promotes LED, the distribution of light that changes LED; By first lenticular body light source is extended out from substrate position simultaneously, and light is reflected second lenticular body by the internal reflection surface of second lenticular body, second lenticular body is become have the secondary light source of irradiation area greatly, thus the application of expansion LED.And the present invention can carry out colour mixture with the light of three kinds of primary colours (RGB) by the reflection to light, thereby forms White LED light source.

Claims

1. lens that are used for led light source, it is characterized in that it comprises integrated first lenticular body and second lenticular body, the central shaft of this first lenticular body and second lenticular body overlaps, wherein first lenticular body is cylinder shape, and it has a confession light and enters the incident bottom surface of first lenticular body and supply the mirrored sides of light in the first lenticular body internal reflection; Second lenticular body has an inner space, this inner space is around the central shaft symmetry of this second lenticular body, the inner space has penetrates the internal reflection surface of second lenticular body with this reflection ray after making the light that enters from the first lenticular body incident bottom surface by the reflection of the mirrored sides of first lenticular body, and the summit of this inner space is positioned at the end face of first lenticular body.

2. a kind of lens that are used for led light source according to claim 1, the incident bottom surface that it is characterized in that described first lenticular body is the plane.

3. a kind of lens that are used for led light source according to claim 1, it is characterized in that described first lenticular body is the cylinder bodily form, the inner space of described second lenticular body is cone shape, and the bottom surface diameter of this cone shape inner space is more than or equal to the diameter of first lenticular body.

4. a kind of lens that are used for led light source according to claim 1 is characterized in that described second lenticular body is the circular arc bodily form.