CN202118806U

CN202118806U - Optical lens for light-emitting diode (LED)

Info

Publication number: CN202118806U
Application number: CN2011201950751U
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: 2011-06-11
Filing date: 2011-06-11
Publication date: 2012-01-18
Anticipated expiration: 2021-06-11

Abstract

The utility model discloses an optical lens for a light-emitting diode (LED), which comprises a cylindrical optical lens body. The optical lens for the LED is characterized in that the optical lens body is provided with a protruding incidence surface and an inner space. The inner space is provided with an inner reflecting surface which enables light rays entering from the incidence surface to be reflected out of the optical lens body. Condensation action of the protruding incidence surface enables the light rays emitted by a LED light source to pass through the protruding incidence surface to be reflected, and then parallel light beams are formed to be reflected into the inner reflecting surface of the inner space, accordingly the light rays are reflected out through the inner reflecting surface. Therefore, irradiating areas of the LED light source are enlarged and can reach to 300 degrees, light intensity and uniformity degree in effective areas of the LED light source are improved simultaneously, and luminous efficiency of the LED is improved.

Description

A kind of optical lens that is used for LED

Technical field

The utility model 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, and surmounts the light efficiency of all lighting sources now greatly, and 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 through optical lens, with the light extraction efficiency that promotes LED, the distribution of light that changes LED; Simultaneously because the appearance and size of LED is less; Need be installed on the substrate; Therefore receive the irradiation area of the influence tradition LED of substrate to receive very big restriction, though existingly in the prior art can led light source extended out with the lens of the irradiation area that increases LED, this lens also can play scattering process to light; Thereby the brightness in the led light source effective coverage is reduced, therefore have the low shortcoming of luminous efficiency.

Summary of the invention

In order to overcome the deficiency of prior art, the utility model provides the optical lens of a kind of LED of being used for, and this optical lens can improve the brightness and the uniformity in the led light source effective coverage, to improve the LED luminous efficiency.

The utility model solves the technical scheme that its technical problem adopted:

A kind of optical lens that is used for LED; Comprise a cylinder shape lenticular body; It is characterized in that lenticular body has the plane of incidence and an inner space of a convexity, this inner space has the internal reflection surface that the feasible light that gets into from this protruding plane of incidence reflects this lenticular body.

As the improvement of the utility model technique scheme, lenticular body is provided with the led chip installing space, and this led chip installing space has the side of refrangible light, and the plane of incidence of said convexity is positioned at the bottom of this led chip installing space.

The middle shaft position of said lens body has a through hole, and this through hole is communicated with this inner space and led chip installing space.

Above-mentioned inner space can be a cone shape.

Preferred embodiment a kind of as the utility model, the plane of incidence of said convexity is around the cylinder shape lenticular body axis formed occluding surface that rotates a circle by a straight line and a camber line.

As the utility model another preferred embodiment, the plane of incidence of said convexity is around the cylinder shape lenticular body axis formed occluding surface that rotates a circle by circular arc line.

The beneficial effect of the utility model is: the utility model can be through the optically focused effect of the protruding plane of incidence; The light that led light source is sent forms the internal reflection surface that parallel light beam is projected to the inner space after the plane of incidence refraction of convexity; Through internal reflection surface light is reflected out; So not only improved the irradiation area of led light source, spent from 180 of LED and reach to 300 degree a replacement tradition crow range of exposures that electricity steeps; Simultaneously also improve the brightness and the uniformity in the led light source effective coverage, improved the LED luminous efficiency.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified:

Fig. 1 is the cutaway view of a kind of embodiment of the utility model;

Fig. 2 is the partial enlarged drawing among Fig. 1;

Fig. 3 is the schematic perspective view of second kind of embodiment of the utility model;

Fig. 4 is the cutaway view of Fig. 3.

The specific embodiment

With reference to Fig. 1, Fig. 2, Fig. 1, Fig. 2 are the structural representations of first kind of embodiment of the utility model, the optical lens that is used for LED shown in the figure; Comprise a cylinder shape lenticular body 1; This cylinder shape lenticular body 1 can be cone shape or cylindrical shape, and the height of this cylinder shape lenticular body 1 can be confirmed according to actual needs, and is certain; Cylinder shape lenticular body also can be other polygon cylinder body shape; This lenticular body 1 has the plane of incidence 11 and an inner space 12 of a convexity, and this inner space 12 has the internal reflection surface 121 that the feasible light that gets into from this plane of incidence reflects this lenticular body, and this inner space 12 can be a cone shape; Also can be other shape, as can adopt bus be in the shape, polygonal pyramid shape etc. of crooked camber line.

As shown in Figure 2; This protruding plane of incidence 11 can be around the cylinder shape lenticular body axis formed occluding surface that rotates a circle by a straight line 111 and a camber line 112; Also can be by circular arc line around the cylinder shape lenticular body axis formed occluding surface that rotates a circle, the plane of incidence that above-mentioned occluding surface forms can play the optically focused effect to the light that led light source sends.

As shown in the figure, lenticular body 1 is provided with led chip installing space 13, and this led chip installing space has the side 131 of refrangible light, and this protruding plane of incidence 11 is positioned at the bottom of this led chip installing space 13.

The operation principle of this embodiment is: some light are rushed for lenticular body from the plane of incidence 11; And focus on the internal reflection surface 121 be refracted to the internal reflection space through the plane of incidence; These light are through internal reflection surface 121 separated into two parts light: a part of light is directly penetrated by internal reflection surface, and a part of light penetrates through the side of lenticular body through the internal reflection surface reflection; In addition; Part light gets into lenticular body by side 131, and after 131 refractions of side, light is directly penetrated by the side of lenticular body; Thereby improved the irradiation area of led light source; Irradiation area can reach 300 degree, has also improved the brightness and the uniformity in the led light source effective coverage simultaneously, has improved the LED luminous efficiency.

With reference to Fig. 3, Fig. 4; Fig. 3, Fig. 4 are the structural representations of second kind of embodiment of the utility model; The structure of the structure of this embodiment and first kind of embodiment is basic identical; Difference is that the middle shaft position of lenticular body 1 has a through hole 14, and this through hole is communicated with this inner space and led chip installing space, has improved the LED luminous efficiency.

The operation principle of this second kind of embodiment is: some light are rushed for lenticular body from the plane of incidence 11; And focus on the internal reflection surface 121 be refracted to the internal reflection space through the plane of incidence; These light are through internal reflection surface 121 separated into two parts light: a part of light is directly penetrated by internal reflection surface, and a part of light penetrates through the side of lenticular body through the internal reflection surface reflection; In addition, a part of light gets into lenticular body by side 131, after 131 refractions of side; Light is directly penetrated by the side of lenticular body; Some light directly penetrates from middle through hole, thereby has improved the irradiation area of led light source, and irradiation area can reach 300 degree; Simultaneously also improve the brightness and the uniformity in the led light source effective coverage, improved the LED luminous efficiency.

Claims

1. optical lens that is used for LED; Comprise a cylinder shape lenticular body; It is characterized in that lenticular body has the plane of incidence and an inner space of a convexity, this inner space has the internal reflection surface that the feasible light that gets into from this protruding plane of incidence reflects this lenticular body.

2. a kind of optical lens that is used for LED according to claim 1; It is characterized in that said lenticular body is provided with the led chip installing space; This led chip installing space has the side of refrangible light, and the plane of incidence of said convexity is positioned at the bottom of this led chip installing space.

3. a kind of optical lens that is used for LED according to claim 2 is characterized in that the middle shaft position of said lenticular body has a through hole, and this through hole is communicated with this inner space and led chip installing space.

4. a kind of optical lens that is used for LED according to claim 1 is characterized in that the inner space is cone shape.

5. a kind of optical lens that is used for LED according to claim 1 and 2, the plane of incidence that it is characterized in that said convexity are around the cylinder shape lenticular body axis formed occluding surface that rotates a circle by a straight line and a camber line.

6. a kind of optical lens that is used for LED according to claim 1 and 2, the plane of incidence that it is characterized in that said convexity are around the cylinder shape lenticular body axis formed occluding surface that rotates a circle by circular arc line.