CN202993057U

CN202993057U - LED lens

Info

Publication number: CN202993057U
Application number: CN2012205935384U
Authority: CN
Inventors: 佟晓龙
Original assignee: ZHAOCHI CO Ltd SHENZHEN
Current assignee: ZHAOCHI CO Ltd SHENZHEN
Priority date: 2012-11-12
Filing date: 2012-11-12
Publication date: 2013-06-12
Anticipated expiration: 2022-11-12

Abstract

An embodiment of the utility model discloses an LED lens. A first side of the lens is an emitting surface, the middle of a second side of the lens recesses inwards to form a lamp hole for holding an LED, a hole wall of the lamp hole forms an incidence surface, and a reflective surface reflecting light to the emitting surface is arranged on the second side of the lens and around the lamp hole. The emitting surface is an annular rotating curved surface integrally shaped in a convex arc surface and recesses backwards in the middle, and the incidence surface is a smooth curved surface. The incidence surface of the LED lens is the smooth curved surface, incidence rate of light can be increased, the emitting surface is the annular rotating curved surface integrally shaped in the convex arc surface and recesses backwards in the middle, refraction convergence effect of light is better, light intensity flare angle of emitting light can be enlarged effectively, and light arriving a display surface is more uniform.

Description

A kind of LED lens

Technical field

The utility model relates to lighting engineering, relates in particular to a kind of LED lens.

Background technology

LED has that volume is little, and power consumption is low, and the advantages such as long service life and high brightness are also day by day extensive in the application of lighting field.Because LED is a kind of spot light, cause its irradiated area little, light is dazzling, so, usually control its lighting angle in the outside fit lens of LED or reflector, with the angle spread that realizes LED light and brightness evenly.

Existing LED lens, the described LED lens plane of incidence is frosting, and curvature is less, its refract light angle is 140 ° of left and right.Reflecting surface is provided with the scroll cone structure of depression, and its reflecting effect is also not obvious.Existing this LED lens are general to the diffusion effect of LED, for the diffusion that improves illuminating ray and evenly arrive display surface, normally by using LED and the incompatible realization of set of lenses of greater number, cause cost increase and assemble loaded down with trivial details.

The utility model content

The utility model embodiment technical problem to be solved is, a kind of LED lens are provided, and effectively promotes the light intensity angle of flare of the light that throws away, makes the light that arrives display surface more even.

In order to reach above purpose, the utility model embodiment has proposed a kind of LED lens, the first side of described lens is exit facet, the second middle part, side of lens caves inward and is formed for the lamp hole of accommodating LED, the wall surface of the hole of lamp hole consists of the plane of incidence, is provided with a circle with the reflecting surface of light reflection to exit facet around described lamp hole on the second side of lens; Described exit facet is for integral body the ring rotation curved surface that convex arc is planar and oppositely cave in the middle part, and the described plane of incidence is smooth surface.

Further, described exit facet is that the place, summit is the surface of revolution of tip-angled shape.

Further, described ring rotation curved surface is the bimodal curve with arc protruding peak of two symmetries along the cross section of self axis face.

Further, be connected by wedge angle between described bimodal curve.

Further, the second side of described lens is provided with around described lamp hole and is a plurality of recessed pyramids to the outside protrusion of lens that array is arranged, and each conical surface of described recessed pyramid is the reflecting surface to exit facet direction reflection ray.

Further, the cone-apex angle of described recessed pyramid is 120 degree.

Further, the periphery of lens also is provided with several fixing feet that is used for fixed lens.

Further, two adjacent fixing feet are connected by fillet and form fixed border around lens.

Further, a described fixed border side surface corresponding with reflecting surface is provided with the first annular pattern zone around described reflecting surface, and also being provided with the second annular pattern district around described lamp hole between reflecting surface and lamp hole, the surface in the described first annular pattern zone and the second annular pattern district is patterned surface.

The beneficial effect of the utility model embodiment is: the plane of incidence of the utility model LED lens is smooth surface, can improve the light impingement rate, and exit facet is for integral body the ring rotation curved surface that convex arc is planar and oppositely cave in the middle part, its refraction convergence effect to light is better, thereby can effectively promote the light intensity angle of flare of emergent ray, make the light uniformity more that arrives display surface.

The reflecting surface of lens bottoms can also will shine light reflection on reflecting surface to exit facet, thereby makes the light intensity of outgoing higher, thereby can effectively reduce the usage quantity of LED and lens.

Description of drawings

Fig. 1 is the top view of the LED lens of the utility model embodiment.

Fig. 2 be the utility model embodiment the LED lens along A-A in Fig. 1 to cutaway view.

Fig. 3 is the A place enlarged drawing in Fig. 2.

Fig. 3 is the C place enlarged drawing in Fig. 2.

Fig. 5 be the utility model embodiment the LED lens along B-B in Fig. 1 to cutaway view.

Fig. 6 is the upward view of the LED lens of the utility model embodiment.

Fig. 7 is the B place enlarged drawing in Fig. 6.

Fig. 8 is the stereogram of the LED lens of the utility model embodiment.

Fig. 9 is the light path schematic diagram of the LED lens of the utility model embodiment.

Figure 10 is the test data figure of the LED lens of the utility model embodiment.

The specific embodiment

Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can mutually combine, and below in conjunction with the drawings and specific embodiments, the utility model are described in further detail.

Please refer to Fig. 1 ~ Fig. 8, the utility model embodiment provides a kind of LED lens 20, and described LED lens 20 can be with transparent material manufacturings such as polymethyl methacrylates.

Referring to figs. 2 and 5, the first side of described lens 20 is exit facet 201, described exit facet 201 is the ring rotation curved surface that convex arc is planar and oppositely cave in the middle part.The lamp hole 205 that the second middle part, side of lens 20 caves inward and is formed for accommodating LED, the wall surface of the hole of described lamp hole 205 consists of the plane of incidence 202, and the described plane of incidence 202 is smooth surface.The described plane of incidence 202 is the axisymmetric curved surface in center with exit facet 201.

With reference to figure 3, the plane of incidence 212 summits places are the surface of revolution of tip-angled shape, and described ring rotation curved surface is the bimodal curve with arc protruding peak of two symmetries along the cross section of self axis face, and is connected by wedge angle between described two bimodal curves.The Depression Centers place of described exit facet 211 is wedge angle.

Be provided with a circle with the reflecting surface of light reflection to exit facet around described lamp hole 205 on the second side of described lens 20, particularly, the second side of described lens 20 is provided with around described lamp hole 205 and is a plurality of recessed pyramids to the outside protrusion of lens body that array is arranged, with reference to figure 4, the cone-apex angle of described recessed pyramid is preferably 120 °, each conical surface 303 of described recessed pyramid is namely as the reflecting surface 203 to exit facet direction reflection ray, and described reflecting surface 203 can be minute surface.Described reflecting surface can effectively destroy the light transmition angle, and light can be reflected at a certain angle, then penetrates via exit facet 201, reaches the effect of light diffusion.

With reference to figure 6 ~ Fig. 8, the periphery of described lens 20 also is provided with several fixing feet 204 that is used for fixed lens 20, and two adjacent fixing feet 204 are connected by fillet and form fixed border 206 around lens 20.In embodiment as shown in Figure 6, described fixing feet 204 is provided with 3 altogether, distributes along even circumferential.

In addition, a side surface corresponding with reflecting surface 203 of described fixed border 206 is provided with the first annular pattern zone 301 around described reflecting surface 203, and also be provided with the second annular pattern district 302 around described lamp hole 205 between reflecting surface 203 and lamp hole 205, the surface in the described first annular pattern zone 301 and the second annular pattern district 302 is patterned surface, the described first annular pattern zone 301 and the second annular pattern district 302 can improve the light layering and prevent aetiolation, process by decorative pattern and can improve the aperture that may form.

When reality is used, with reference to figure 9, be loaded on the light that the LED lamp in lamp hole 205 sends and inject lens 20 by the plane of incidence 202, the place can occur to reflect for the first time at the plane of incidence, and has a small amount of reflection; When light arrived exit facet 201, light can occur reflect for the second time and reflect, and wherein the light of reflection can be reflexed on exit facet 201 again by reflecting surface 203 basically, and penetrated via exit facet 201.Finally, reach the emergent light angle and compare the effect that the lighting angle of original LED increases.The utility model LED lens have the effect with the average intensity angle of flare expansion of LED lamp, and actual numerical value can be with reference to test data as shown in figure 10.

The above is the specific embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also are considered as protection domain of the present utility model.

Claims

1. LED lens, the first side of described lens is exit facet, the second middle part, side of lens caves inward and is formed for the lamp hole of accommodating LED, and the wall surface of the hole of lamp hole consists of the plane of incidence, is provided with a circle with the reflecting surface of light reflection to exit facet around described lamp hole on the second side of lens; It is characterized in that, described exit facet is for integral body the ring rotation curved surface that convex arc is planar and oppositely cave in the middle part, and the described plane of incidence is smooth surface.

2. LED lens as claimed in claim 1, is characterized in that, described exit facet is that the place, summit is the surface of revolution of tip-angled shape.

3. LED lens as claimed in claim 1, is characterized in that, described ring rotation curved surface is the bimodal curve with arc protruding peak of two symmetries along the cross section of self axis face.

4. LED lens as claimed in claim 3, is characterized in that, is connected by wedge angle between described bimodal curve.

5. LED lens as claimed in claim 1, it is characterized in that, the second side of described lens is provided with around described lamp hole and is a plurality of recessed pyramids to the outside protrusion of lens that array is arranged, and each conical surface of described recessed pyramid is the reflecting surface to exit facet direction reflection ray.

6. LED lens as claimed in claim 1, is characterized in that, the cone-apex angle of described recessed pyramid is 120 degree.

7. LED lens as claimed in claim 5, is characterized in that, the periphery of lens also is provided with several fixing feet that is used for fixed lens.

8. LED lens as claimed in claim 7, is characterized in that, two adjacent fixing feet are connected by fillet and form fixed border around lens.

9. LED lens as claimed in claim 8, it is characterized in that, a described fixed border side surface corresponding with reflecting surface is provided with the first annular pattern zone around described reflecting surface, and also being provided with the second annular pattern district around described lamp hole between reflecting surface and lamp hole, the surface in the described first annular pattern zone and the second annular pattern district is patterned surface.