CN201527991U

CN201527991U - LED with toroidal lens

Info

Publication number: CN201527991U
Application number: CN 200920183479
Authority: CN
Inventors: 宁俊
Original assignee: Xiamen Hualian Electronics Co Ltd
Current assignee: Xiamen Hualian Electronics Co Ltd
Priority date: 2009-10-28
Filing date: 2009-10-28
Publication date: 2010-07-14
Anticipated expiration: 2019-10-28

Abstract

The utility model discloses an LED with a toroidal lens. The LED comprises a chip, a bracket, fluorescence rubber and an encapsulation material, wherein the chip is fixed on the bracket and coated with the fluorescence rubber; the encapsulation material is encapsulated outside the chip; seen from the longitudinal section, the outside central part of the encapsulation material is an concave surface sinking inwards, and an outside curve outside the concave surface is formed by a plurality of spherical surfaces with different curvatures. By conducting special structure design on the outer surface of the encapsulation material, namely, adopting the plurality of spherical surfaces with different curvatures to design an external light-emitting surface of the material, the LED solves the problem that the illumination of a white light LED is uneven when in lighting by means of simple structure without using a secondary lens and a reflecting cup.

Description

The LED of band shape lens

Technical field

The utility model relates to the technical field of LED encapsulation and LED optical design, refers to a kind of LED of band shape lens especially.

Background technology

Power type white light LED is considered to the solid light source of a new generation because of plurality of advantages such as its energy-saving and environmental protection, will progressively replace traditional lighting light sources such as incandescent lamp, fluorescent lamp, enters the general lighting field.

When general white light LEDs is used as illumination, the shape of its outside encapsulation material (can be lens 5 ') mostly is hemisphere face or truncated cone-shaped as shown in Figure 1 and Figure 2, the encapsulation material of this shape is luminous after its refraction at led chip, and very bright and dark all around in the middle of the hot spot that is produced, illumination is very inhomogeneous.And solution at present commonly used is improved uniformity of illuminance for using secondary optical lens or reflector, but owing to increased secondary lens or reflector, and these two kinds of method structures are all comparatively complicated and improved cost.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of LED of band shape lens, and it is simple in structure, and the problem of uneven illumination when need not additionally to set up secondary optical lens or reflector and can solve LED as illumination.

For achieving the above object, solution of the present utility model is:

A kind of LED of band shape lens comprises chip, support, fluorescent glue and encapsulation material; Chip is fixed on the support, coating fluorescent glue on it, and the encapsulation material is packaged in outside the chip; This encapsulation material is from the longitudinal section, and its appearance core is cambered inwards inner concave, and the outer N-Side surf beyond the inner concave is to be made of the different sphere of a plurality of curvature.

Described encapsulation material is from overlooking the annular that is seen as the indent evagination.

Described encapsulation material is from overlooking, and wherein the outer N-Side surf of intracardiac concave surface is three or three above ball bumps.

Described encapsulation material is rack-mount lens, and fills with the silica gel in lens.

Described lens are made by the resin or the silica gel of high-transmittance.

Described encapsulation material is the silica gel that directly is packaged on the support, chip is outer.

After adopting such scheme, because the utility model is by lens of LED of particular design, these lens (promptly encapsulating material) externally light-emitting area adopt the sphere of a plurality of different curvature to design, under the situation of not using secondary lens and reflector, solved the problem of the uneven illumination of white light LEDs when throwing light on simple structure; And, also just reduced production cost owing to do not use secondary optical lens and reflector.

Description of drawings

Fig. 1 is for commonly using the hemispherical lens schematic diagram;

Fig. 2 is for commonly using truncated cone-shaped lens schematic diagram;

Fig. 3 is the utility model LED generalized section;

Fig. 4 is the utility model LED schematic top plan view;

Fig. 5 is the utility model LED surface of intensity distribution;

Fig. 6 is the utility model second embodiment LED vertical view;

Fig. 7 is the utility model the 3rd embodiment LED generalized section.

Embodiment

As shown in Figure 3, be a preferred embodiment of the present utility model, the LED that the utility model provides comprises chip 2, support 1, fluorescent glue 3, silica gel 4 and lens 5.Described chip 2 is fixed on the support 1, go between support 1 from chip 2 again on.Be coated with fluorescent glue 3 on the chip 2, be installed to lens 5 on the support 1 and be placed on outside the chip 2, annotating in the lens 5 again and go up silica gel 4.

Lens 5 in the present embodiment can be made by the resin or the silica gel of high-transmittance, longitudinal section (as Fig. 3) from lens 5, its appearance core is cambered inwards inner concave 51, outer N-Side surf 52 beyond the inner concave 51 is to be made of the different sphere of a plurality of curvature, and from overlook (as shown in Figure 4) of lens 5, the annular of its indent evagination.

The LED of this structure can obtain luminous light distribution behind the light scioptics 5 that chip 2 sends according to the Application Optics principle and in conjunction with the luminous light distribution of chip 2, as shown in Figure 5, the illumination effect of LED be the centre secretly, bright all around.The LED of this light distribution can obtain uniform illuminance in the middle of using illumination.

As shown in Figure 6, be the utility model second preferred embodiment.The difference of present embodiment and the foregoing description is: described lens 5 are from overlooking, and the outer N-Side surf 52 of the inner concave 51 at its center is four ball bumps.The lens 5 of this structure, though it also is middle dark bright all around making the luminous light distribution of LED, but brightness all around is even not as the foregoing description one, but it is bright at the ball bumps place, darker between two projectioies, and in order to obtain circular light spot, described ball bumps number must be more than three and three.

Again as shown in Figure 7, it is the 3rd preferred embodiment of the present utility model.The difference of described embodiment and above-mentioned first embodiment is: side outside the described chip 2, only be packaged with silica gel 4, and the appearance of this silica gel 4 is identical with the appearance of the foregoing description one, be that its core is cambered inwards inner concave 41, the outer N-Side surf 42 beyond the inner concave 41 is to be made of the different sphere of a plurality of curvature.The present embodiment explanation, the encapsulation material in described chip 2 outsides can only be a silica gel, also can be silica gel in lens and the injection lens, and key of the present utility model is, the external surface shape of described encapsulation material should be the structure of indent evagination.

In sum, the utility model is by changing the external surface shape of conventional package material, adopt the sphere design of a plurality of different curvature in the outside light-emitting area of this encapsulation material, can under the situation of not using secondary optical lens and reflector, solve white light LEDs even problem of uneven illumination when throwing light on simple structure; Owing to do not use secondary optical lens and reflector, also just reduced production cost on the other hand.

Claims

1. the LED of band shape lens comprises chip, support, fluorescent glue and encapsulation material; Chip is fixed on the support, coating fluorescent glue on it, and the encapsulation material is packaged in outside the chip; It is characterized in that: described encapsulation material is from the longitudinal section, and its appearance core is cambered inwards inner concave, and the outer N-Side surf beyond the inner concave is to be made of the different sphere of a plurality of curvature.

2. the LED of band shape lens as claimed in claim 1 is characterized in that: described encapsulation material is from overlooking the annular that is seen as the indent evagination.

3. the LED of band shape lens as claimed in claim 1 is characterized in that: described encapsulation material is from overlooking, and wherein the outer N-Side surf of intracardiac concave surface is three or three above ball bumps.

4. as the LED of claim 1,2 or 3 described band shape lens, it is characterized in that: described encapsulation material is rack-mount lens, and fills with the silica gel in lens.

5. the LED of band shape lens as claimed in claim 4 is characterized in that: described lens are made by the resin or the silica gel of high-transmittance.

6. as the LED of claim 1,2 or 3 described band shape lens, it is characterized in that: described encapsulation material is the silica gel that directly is packaged on the support, chip is outer.