CN202581128U

CN202581128U - Light emitting diode (LED) diverging lens

Info

Publication number: CN202581128U
Application number: CN 201220239837
Authority: CN
Inventors: 姚斌; 黄哲人; 颜坤
Original assignee: GUANGDONG HONGLEIDA OPTOELECTRIC TECHNOLOGY Co Ltd
Current assignee: GUANGDONG HONGLEIDA OPTOELECTRIC TECHNOLOGY Co Ltd
Priority date: 2012-05-25
Filing date: 2012-05-25
Publication date: 2012-12-05
Anticipated expiration: 2022-05-25

Abstract

The utility model relates to a light emitting diode (LED) lens, and in particular relates to an LED diverging lens which cooperates with a medium-high-power LED light source for use, diffuses light rays sent by the medium-high-power LED light source to obtain a luminance uniform face at a fixed distance through permutation and combination. The LED diverging lens comprises a lens body, wherein the bottom face of the lens body is a reflective face; the middle part of the bottom of the lens body is provided with a recessed light receiving hole; the upper end face of the light receiving hole is a curved face for refracting and diffusing light rays; the lens body is disk-sahped; and the upper end face of the lens body is a light emergent curved face for transmitting light rays. By the LED diverging lens, the shortage in the prior art is overcome. The LED lens is simple in structure, good in diverging effect, and is favorable for improving the production efficiency and reducing the production cost.

Description

The LED astigmat

Technical field

The utility model relates to a kind of LED lens, relates in particular to high-power LED light source use in a kind of cooperation, and the light that middle high-power LED light source is sent spreads, and through permutation and combination, on fixed range, obtains the LED astigmat of an even face of brightness.

Background technology

In recent years, LED especially passes through the area source that the LED lamp is made because characteristics such as its energy-conserving and environment-protective are used the various occasions that are used to live gradually; And the luminous flat of using the LED area source to make to have power low; Brightness is high, and is luminous even, rich color; Characteristics such as environmental protection and energy saving are in the electronic products such as extensive use and mobile phone, TV, dull and stereotyped advertisement, reading machine.

Fig. 4 is a kind of stereogram of existing LED area source.Fig. 5 is the sectional view of the LED area source of Fig. 4.The step of the LED area source of making at present is following: one on the printed wiring board 7 of the good circuit of cloth with less spacing welding LED luminescence chip 2; Use light tight and have the white heat-curable resin 1 of certain reflective characteristic to surround a light-emitting zone in that LED luminescence chip 2 welding regions are peripheral then; In this zone, fill and have the epoxy resin 5 that light is seen through but have astigmatism and mixed light characteristic; Increase a light-diffusing film 6 at last in the above again, so just obtain an evenly flat luminous source of bright dipping.

Therefore but in order to guarantee the emitting brightness uniformity of luminous flat, the arrangement pitches of the LED luminescence chip 2 on the printed wiring board 7 is very little, causes on small size very needed LED luminescence chip 2 quantity in flat luminous source very many; Make the cost in flat luminous source to reduce; And processing technology is complicated, under the production efficiency, along with the extensive application of led light source product; Press for a production cost end of than, the LED planar light source product that production efficiency is high.

In order to solve these with topic, people have designed a kind of product of side back of the body led light source, and by a large amount of exploitations and use, Fig. 6 is the stereogram of side back of the body led light source; Fig. 7 is the schematic cross-section of side back of the body led light source.

This side back of the body led light source is to adopt complete transparent heat thermosetting resin 1 as main body; Be designated hereinafter simply as LGP 9; Led light source 8 is placed on the side of LGP 9; Simultaneously owing to have the white material of reflective and astigmatic characteristic or the granule that moulding has astigmatic characteristic in LGP 9 lower surface printings; The light that LED luminescence chip 2 sends is reflected and astigmatism, and arrives the light-diffusing film 6 that is attached to plane on the LGP 9 through the surface, after light is through light-diffusing film 6, will obtain a uniform luminous flat; Lower plane at this LGP 9 posts white reflection film 4 in addition, and silver color bound edge film 3 is posted in the side, and the light that gets into LGP 9 can only be come out from upper surface, improves the utilization rate of light;

But the product of this design is because the distance of light process in LGP 9 can be long; The energy of loss light in a large number is again through repeatedly reflection and refraction, under the efficient of actual bright dipping can be very; Moreover; This LGP 9 need be puted up many reflectance coatings and light-diffusing film 6, and speed of production is slow, and processing cost is high.

Summary of the invention

The purpose of the utility model is to solve the deficiency of prior art, and LED is provided astigmat, and this LED lens arrangement is simple, is of value to and enhances productivity, and reduces production costs.

For achieving the above object, the technical scheme that the utility model adopts is:

The LED astigmat; Comprise lens body; The bottom surface of lens body is a reflective surface, and the middle part of the bottom surface of lens body is provided with the light well of indent, and the upper surface of said light well is the curved surface that is used for the light refraction diffusion; Said lens body is in the form of annular discs, and the end face of lens body is the bright dipping curved surface that is used for the light transmission.

As preferably, the bottom surface of said lens body is extended a plurality of convex bodys downwards, and convex body is inverted-cone shape.

As preferably, the side of said lens body is provided with convexity.

As preferably, the bottom surface of said lens body is provided with the cylinder that is used to install.

The effect of the utility model: according to the lens body of the utility model; High-power LED light source use in a kind of cooperation can be provided, and the light that middle high-power LED light source is sent spreads, and passes through permutation and combination; On fixed range, obtain an even brightness plane; Astigmatism is effective, and the utility model is simple in structure, helps reducing the production cost of LED lamp.

Description of drawings

The stereogram of Fig. 1 the utility model.

The profile of Fig. 2 the utility model.

The plane of the bottom surface of Fig. 3 the utility model.

Fig. 4 is a kind of stereogram of existing LED area source.

Fig. 5 is the sectional view of the LED area source of Fig. 4.

Fig. 6 is the stereogram of side back of the body led light source.

Fig. 7 is the schematic cross-section of side back of the body led light source.

Reference numeral is:

1---thermosetting resin 2---LED luminescence chip

3---bound edge film 4---reflective membrane

5---epoxy resin 6---light-diffusing film

7---printed wiring board 8---led light source

9---LGP 10---light well

20---bright dipping curved surface 30---convex body

40---protruding 50---cylinder

100---lens body.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is made specification further.

Embodiment: extremely shown in Figure 3 like Fig. 1; The LED astigmat comprises lens body 100, and the bottom surface of lens body 100 is a reflective surface; The middle part of the bottom surface of lens body 100 is provided with the light well 10 of indent; The upper surface of said light well 10 is the curved surface that is used for light refraction diffusion, and said lens body 100 is in the form of annular discs, and the end face of lens body 100 is the bright dipping curved surface 20 that is used for the light transmission.

The light that middle high-power LED light source sends the at first curved surface refraction of the light well 10 of scioptics body 100 gets into lens body 100; Principle according to refraction; With light to external diffusion; Make most light be angle spread, and the bright dipping curved surface 20 of scioptics body 100 reflects and gets in the air once more, a plurality of in high-power LED light sources with lens body 100 cooperations also carries out assembled arrangement; Make and face the mutual cross lamination of light that the assembly of high-power LED light source and lens body 100 sends in two groups mutually, obtain a homogeneous light emitting area.This mode needing relatively to be suitable for large tracts of land, high brightness, evenly on the luminous product of face, backlight like TV, billboard is backlight, indoor surface light-emitting lamp lamp is used; Its driving power is low, and brightness is high, and is luminous even; And can realize that through the middle high power light source that uses RGB to cooperate the uniform face of multicolour conversion is luminous; And all material can both realize environmental protection, because the light that middle high-power LED light source sent is only through ofer short duration distance and two refractions in the lens body 100, so the loss of light is very little; Its light extraction efficiency can reach more than 90%, only needs fewer light source just can obtain the luminous flat of high brightness.

Reasonablely be; Because the inwall at the light well 10 of this lens body 100 is that the upper surface is designed with free form surface; At first the light that get in the lens body 100 have been carried out refraction for the first time, the light that led light source is sent has carried out the first step and has broken up and redistribute.

Reasonablely be owing to be designed with bright dipping curved surface 20, once more the light of scioptics broken up and distributed at this lens body 100 exiting surfaces.

As preferably, the bottom surface of said lens body 100 is extended a plurality of convex bodys 30 downwards, and convex body 30 is inverted-cone shape.

As distortion, convex body 30 can be flute profile or the bottom surface is the cloudy surface structure.

Or be designed with convex body 30, flute profile cloudy surface structure in this lens body 100 bottom surfaces, can prevent the phenomenon of regional area speck, improve and uniformity of light breaing up once more going out the light that is reflected on the optical interface.

As preferably, the side of said lens body 100 is provided with protruding 40.

In this lens body 100 lateral layout 3 convexities 40 are arranged, confirm direction when making things convenient for lens body 100 to install.

As preferably, the bottom surface of said lens body 100 is provided with the cylinder 50 that is used to install.

Reasonablely be, be designed with 3 cylinders 50, guarantee when lens body 100 is installed, can stablize and put in this lens body 100 bottom surfaces.

Below only be the application's preferred embodiment, equivalent technical solutions on this basis still falls into the application protection domain.

Claims

1.LED astigmat; It is characterized in that: it comprises lens body; The bottom surface of lens body is a reflective surface, and the middle part of the bottom surface of lens body is provided with the light well of indent, and the upper surface of said light well is the curved surface that is used for the light refraction diffusion; Said lens body is in the form of annular discs, and the end face of lens body is the bright dipping curved surface that is used for the light transmission.

2. LED astigmat according to claim 1 is characterized in that: the bottom surface of said lens body is extended a plurality of convex bodys downwards, and convex body is inverted-cone shape.

3. LED astigmat according to claim 1 and 2 is characterized in that: the side of said lens body is provided with convexity.

4. LED astigmat according to claim 3 is characterized in that: the bottom surface of said lens body is provided with the cylinder that is used to install.