CN201349021Y

CN201349021Y - Rectangular light distribution LED

Info

Publication number: CN201349021Y
Application number: CNU200820229577XU
Authority: CN
Inventors: 宁俊
Original assignee: Xiamen Hualian Electronics Co Ltd
Current assignee: Xiamen Hualian Electronics Co Ltd
Priority date: 2008-12-25
Filing date: 2008-12-25
Publication date: 2009-11-18
Anticipated expiration: 2018-12-25

Abstract

The utility model discloses a rectangular light distribution LED, which comprises a chip, a support, fluorescence and packing materials, wherein the chip is fixed on the support, and the fluorescence is coated on the support, the packing materials are packed outside the chip, seen from the transverse longitudinal section, the central portion of the external surface of the packing materials are an internal concave surface which is concave inward, an external curved surface outside the internal concave surface is formed through a plurality of spherical surfaces with different curvatures, seen from the transverse longitudinal section, the packing materials are round, seen from vertical viewing, the packing materials are two similar globoids which are arranged symmetrically in the transverse direction. Through carrying out the specific structure designing to the external surface of the packing materials, an external light-emitting surface of the LED adopts a plurality of the spherical surfaces with different curvatures, under the conditions that a secondary lens and a reflecting cup are not used, the problem of uneven illumination of a white light LED during the illumination is solved with simple structure, and the rectangular light distribution can be obtained.

Description

Rectangular light distribution LED

Technical field

The utility model relates to the technical field of LED encapsulation and LED optical design, refers to a kind of rectangular light distribution LED 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.

The shape of its outside encapsulating material (can be lens 5 ') of general white light LEDs mostly is hemisphere face or truncated cone-shaped as shown in Figure 1 and Figure 2, the encapsulating material of this shape is luminous after its refraction at led chip, the light that is produced is very bright and dark all around in the middle of distributing, when therefore this white light LEDs was as street lighting, illumination was very inhomogeneous.And solution commonly used is at present improved uniformity of illuminance for using secondary optical lens or reflector, but owing to increased secondary lens or reflector, these two kinds of method structures all comparatively complexity improved cost, and increased process complexity, reduced production efficiency.The light that existing in addition LED is produced is distributed as circle, does not meet the characteristic of road lengthwise, and road both sides light in addition often occurs and be wasted, and the problem that road longitudinally light falls short of.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of photodistributed LED of rectangle that produces, and it need not additionally to set up secondary optical lens or reflector can solve the problem that LED is used as uneven illumination when throwing light on.

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

A kind of rectangular light distribution LED comprises chip, support, fluorescent glue and encapsulating material; Chip is fixed on the support, coating fluorescent glue on it, and encapsulating material is packaged in outside the chip; Described encapsulating material is from horizontal 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; From horizontal longitudinal section, encapsulating material is circular; From overlooking, for encapsulating material is two spheroidal bodies that symmetric transverse is arranged.

Described encapsulating material is rack-mount lens, and fills with silica gel or resin in lens.

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

Described encapsulating material is the silica gel or the resin that directly are 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 (perhaps encapsulating material such as silica gel, resin) externally light-emitting area adopt the sphere of a plurality of different curvature to design, and overlook two spheroidal bodies arranging into symmetric transverse, therefore under the situation of not using secondary lens and reflector, make that the last light effect that goes out of LED is that the uniform rectangular light of illumination distributes, solved the problem of the uneven illumination of white light LEDs when the street lighting with simple structure; And, also just reduced production cost owing to do not use secondary optical lens and reflector.In addition, the rectangular light that produced distributes and meets the longitudinally on road surface, and under the situation with constant power, it is longer along road direction that the light of irradiation is distributed, and then can avoid light to overflow and wastes perpendicular to road direction.

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 generalized section of the utility model first embodiment LED;

Fig. 4 is the A-A cutaway view of Fig. 3;

Fig. 5 is the schematic top plan view of the utility model first embodiment LED;

Fig. 6 is the utility model LED surface of intensity distribution;

Fig. 7 is the generalized section of the utility model second embodiment LED;

Fig. 8 is the B-B cutaway view of Fig. 7;

Fig. 9 is the schematic top plan view of the utility model second embodiment LED.

Embodiment

Shown in Fig. 3,4,5, it is first preferred embodiment of the present utility model, and the LED that present embodiment provides comprises chip 2, support 1, fluorescent glue 3, silica gel or resin 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 or resins 4.

Lens 5 in the present embodiment can be made by the resin or the silica gel of high-transmittance, horizontal longitudinal section (as Fig. 3) from lens 5, its outer surface core is cambered inwards inner concave 51, and the 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 the vertical longitudinal section (as Fig. 4) of lens 5, its outer surface is circular; From the overlooking (as shown in Figure 5) of lens 5, be two spheroidal bodies that symmetric transverse is arranged again.

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 6, the LED of this light distribution can obtain the uniform rectangular light distribution of illumination in the middle of using illumination.

Fig. 7 is to shown in Figure 9 for another example, and it is second 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 or resin 4, and the appearance of this silica gel or resin 4 is identical with the appearance of the foregoing description one lens, be that it is from horizontal longitudinal section, core is cambered inwards inner concave 41, outer N-Side surf 42 beyond the inner concave 41 is to be made of the different sphere of a plurality of curvature, and from vertical longitudinal section, silica gel or resin 4 outer surfaces are circular.The molding mode of silica gel or resin 4 is earlier support 1 and mould bar (not shown) to be closely cooperated, and again silica gel or resin 4 is annotated the mould bar, and directly hot briquetting can form silica gel or resin 4 after removing the mould bar afterwards.The present embodiment explanation, the encapsulating material in described chip 2 outsides can only be silica gel or resin, also can be silica gel or resin in lens and the injection lens, and key of the present utility model is, the external surface shape of described encapsulating material should be the structure of indent evagination.

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

Claims

1, a kind of rectangular light distribution LED comprises chip, support, fluorescent glue and encapsulating material; Chip is fixed on the support, coating fluorescent glue on it, and encapsulating material is packaged in outside the chip; It is characterized in that: described encapsulating material is from horizontal 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; From horizontal longitudinal section, encapsulating material is circular; From overlooking, for encapsulating material is two spheroidal bodies that symmetric transverse is arranged.

2, rectangular light distribution LED as claimed in claim 1, it is characterized in that: described encapsulating material is rack-mount lens, and fills with silica gel or resin in lens.

3, rectangular light distribution LED as claimed in claim 2, it is characterized in that: described lens are made by the resin or the silica gel of high-transmittance.

4, rectangular light distribution LED as claimed in claim 1 is characterized in that: described encapsulating material is the silica gel or the resin that directly are packaged on the support, chip is outer.