CN101749643A

CN101749643A - Light emitting diode (LED) lens and LED lens group

Info

Publication number: CN101749643A
Application number: CN200910261795A
Authority: CN
Inventors: 何琳; 张道强; 李盛远; 李剑
Original assignee: Shenzhen Bang Bell Electronics Co ltd
Current assignee: Shenzhen Bang Bell Electronics Co ltd
Priority date: 2009-12-25
Filing date: 2009-12-25
Publication date: 2010-06-23
Anticipated expiration: 2029-12-25
Also published as: CN101749643B

Abstract

The invention discloses a light emitting diode (LED) lens, comprising a bowl-shaped body. The bottom of the body is provided with a lamp hole for placing an LED, a fully reflecting surface is arranged around the lamp hole, and the front end of the body is provided with an exit face. The LED lens is characterized in that the exit face comprises a round smooth curve and a connection part, wherein the round smooth curve is convexly arranged in the middle of the front end of the body, and the connection part extends outwards from the edge of the round smooth curve in an arc shape to be connected with the side edge at the front end of the body. The invention also discloses a corresponding LED lens group. In the invention, dust or blot is not easily accumulated, and even if dust or blot is accumulated, due to the smooth transition of the surface and large-area smoothness, the dust or blot can be very easily cleared. Particularly, when a plurality of LED lenses are combined to form the LED lens group, a lampshade can be save, the optical loss is reduced, and the extraction efficiency is improved. In addition, the invention has simple structure, is easy to manufacture and form, and can be applied to the field of LED illumination, such as indoor illumination and the like.

Description

LED lens and LED set of lenses

Technical field

The present invention relates to lighting engineering, relate in particular to a kind of LED lens and LED set of lenses.

Background technology

LED is widely used in various lighting fields as a kind of efficient, energy-conservation lighting source, yet because LED for dispersing light source, thereby when it is used as illumination, needs cooperate the LED lens use that guides effect of light usually.

Existing LED lens surface is roughness usually, deposits dust or spot easily, is not easy cleaning.

Summary of the invention

Technical problem to be solved by this invention is: a kind of LED lens are provided, and these lens are not easy to deposit dust or spot; Even dust or spot are arranged, also be very easy to cleaning; When particularly being combined into arrayed applications, can need not lampshade, thereby reduce light loss, improve light extraction efficiency, have very high uniformity of illuminance; And simple for structure, be easy to machine-shaping.

The further technical problem to be solved of the present invention is: a kind of LED set of lenses is provided, and this set of lenses is not easy to deposit dust or spot; Even dust or spot are arranged, also be very easy to cleaning; And need not lampshade, thereby reduce light loss, improve light extraction efficiency, have very high uniformity of illuminance; And simple for structure, be easy to machine-shaping.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

A kind of LED lens, include the body that is bowl-shape, be provided with the lamp hole that is used to insert LED in the bottom of described body, be provided with fully reflecting surface around described lamp hole, front end at body is provided with exit facet, described exit facet includes and protrudes the circular smooth surface be arranged on the body front center, and extends out to the convergence part that the lateral edges with described body front end joins from the edge of this circle smooth surface with arcuation.

Correspondingly, the invention also discloses a kind of LED set of lenses, this LED set of lenses is linked to each other with adjacent lenses by the connection edge of being located at its body front end by aforementioned each LED lens and forms a cover body.

The invention has the beneficial effects as follows:

Embodiments of the invention are very smooth by lens surface being arranged to the middle part, the structure that the edge reduces with arc gradually, thereby be not easy to deposit dust or spot, even dust or spot are arranged, because the surface smoothing transition, and large tracts of land is smooth, also be very easy to cleaning, very practical when particularly being combined into the application that array saves lampshade, can reduce light loss because save lampshade, improve light extraction efficiency; And simple for structure, be easy to machine-shaping.Can be applicable to LED illumination application, as room lighting etc.

The present invention is described in further detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the three-dimensional structure diagram of an embodiment of LED lens provided by the invention.

Fig. 2 is the vertical view of an embodiment of LED lens provided by the invention.

Fig. 3 a-Fig. 3 d is four kinds of profiles of the A-A section of Fig. 2.

Fig. 4 is the radius schematic diagram of an embodiment each several part of LED lens provided by the invention.

Fig. 5 is the light path schematic diagram of an embodiment of LED lens provided by the invention.

Fig. 6 is the hot spot schematic diagram of an embodiment of LED lens provided by the invention.

Fig. 7 is the polar coordinates curve of light distribution figure of an embodiment of LED lens provided by the invention.

Fig. 8 is the rectangular co-ordinate curve of light distribution figure of an embodiment of LED lens provided by the invention.

Fig. 9 is the three-dimensional structure diagram of an embodiment of LED set of lenses provided by the invention.

Figure 10 is the three-dimensional structure diagram of another side embodiment illustrated in fig. 9.

The specific embodiment

Describe one embodiment of the present of invention in detail below with reference to Fig. 2-Fig. 5.

As shown in the figure, present embodiment mainly includes the body 1 that is bowl-shape, be provided with the lamp hole 12 that is used to insert LED in the bottom of described body 1, be provided with fully reflecting surface 10 around lamp hole 12, front end at body is provided with exit facet 2, exit facet 2 includes and protrudes the circular smooth surface 21 be arranged on body 1 front center, and extends out to the convergence part 22 that the lateral edges with body 1 front end joins from the edge of this circle smooth surface 21 with arcuation.

During specific implementation, lamp hole 12 can be hemispherical and (sees that Fig. 3 a) or cylindrical (seeing Fig. 3 b) or based on cylindrical, and its side towards exit facet 2 is provided with the structure of hemispherical depression portion (seeing Fig. 3 c) or based on cylindrical, and it is provided with the structure (seeing Fig. 3 d) of spherical protuberance towards a side of exit facet 2, and the radius of circular smooth surface 21 is not less than the radius of lamp hole 12.

In addition, the lateral edges place of described body 1 front end also is provided with and connects edge 11.

During specific implementation, with reference to figure 4, the radius of curvature R 1=∞ of circular smooth surface 21 central points; And the radius of curvature of exit facet 2 changes to exit facet 2 continuous edge from the center of circular smooth surface 21, and natch, the radius of curvature of circular smooth surface 21 and convergence part 22 is continuous variation.

Further, convergence part 22 is wired to 58 ° of angles radius of curvature R 2=6.8mm of place with trunnion axis and vertical axes crosspoint, becomes 43 ° of angles radius of curvature R 3=5.2mm of place with the trunnion axis positive direction, becomes 32 ° of angles radius of curvature R 4=5.4mm of place with the trunnion axis positive direction.

Describe an embodiment of LED set of lenses provided by the invention in detail below with reference to Fig. 9 and Figure 10.As shown in the figure, present embodiment is with more than 100 combinations of the described LED lens of previous embodiment, constitute LED set of lenses 101, during specific implementation, described each LED lens 100 link to each other with adjacent lenses 100 by the connection edge 11 of being located at its body front end and form a cover body 101.

During specific implementation, cover body 101 can be cuboid or cube-shaped, round pie.

The present invention compares with existing LED lens, except that the uniformity of illuminance that provides is high especially, its lens surface is very level and smooth simultaneously, there are not sharp protrusion or sunk structure, the middle part is very smooth, the edge reduces with arc gradually, have the following advantages: 1, be not easy to deposit dust or spot, even dust or spot are arranged, because the surface smoothing transition, and large tracts of land is smooth, also be very easy to cleaning, very practical when particularly being combined into the application that array saves lampshade, can reduce light loss because save lampshade, improve light extraction efficiency; 2, simple for structure, be easy to machine-shaping.

The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.

Claims

1. LED lens, include the body that is bowl-shape, be provided with the lamp hole that is used to insert LED in the bottom of described body, be provided with fully reflecting surface around described lamp hole, front end at body is provided with exit facet, it is characterized in that: described exit facet includes and protrudes the circular smooth surface be arranged on the body front center, and extends out to the convergence part that the lateral edges with described body front end joins from the edge of this circle smooth surface with arcuation.

2. LED lens as claimed in claim 1 is characterized in that: the radius of curvature R 1=∞ of described circular smooth surface central point; And the radius of curvature of described exit facet changes from center to the exit facet continuous edge of described circular smooth surface.

3. LED lens as claimed in claim 2 is characterized in that: and described convergence part becomes 58 ° of angles radius of curvature R 2=6.8mm of place, becomes 43 ° of angles radius of curvature R 3=5.2mm of place with the trunnion axis positive direction, becomes 32 ° of angles radius of curvature R 4=5.4mm of place with the trunnion axis positive direction with the trunnion axis positive direction.

4. LED lens as claimed in claim 1, it is characterized in that: described lamp hole is a hemispherical, cylindrical or cylindrical or based on cylindrical, and its side towards described exit facet is provided with the structure of hemispherical depression portion or based on cylindrical, and it is provided with the structure of spherical protuberance towards a side of described exit facet.

5. LED lens as claimed in claim 1 is characterized in that: the radius of described circular smooth surface is not less than the radius of described lamp hole.

6. LED lens as claimed in claim 1 is characterized in that: the lateral edges place of the front end of described body also is provided with the connection edge.

7. one kind by as any LED set of lenses that described LED lens are formed in the claim 1～6, and it is characterized in that: described each LED lens link to each other with adjacent lenses by the connection edge of being located at its body front end and form a cover body.

8. LED set of lenses as claimed in claim 6, it is characterized in that: described cover body is a cuboid or cube-shaped.