CN104344345A

CN104344345A - Lens and light source module using same

Info

Publication number: CN104344345A
Application number: CN201310340579.1A
Authority: CN
Inventors: 胡朝景; 戴丰源; 陈柏洲
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2013-08-07
Filing date: 2013-08-07
Publication date: 2015-02-11

Abstract

The invention relates to a lens, and the lens is used for regulating light rays emitted by a luminescent diode. The lens comprises an in-light surface, an out-light surface and a bottom surface, wherein the in-light surface is sunken to the inner part of the lens from the bottom surface; the out-light surface is positioned above the in-light surface and comprises a concave surface and convex surfaces positioned on both sides of the concave surface; the out-light surface is changed in an undulate manner in a first direction, and is unchanged in a second direction which is perpendicular to the first direction; after being regulated by the lens, light types generated by the luminescent diode are lengthened in the first direction. The invention also provides a light source module using the lens.

Description

Lens and apply the light source module of these lens

Technical field

The present invention relates to a kind of lens and apply the light source module of these lens.

Background technology

Compared to traditional light emitting source, light emitting diode (Light Emitting Diode, LED) has the advantages such as lightweight, volume is little, it is low to pollute, the life-span is long, it is as a kind of novel light emitting source, applied more and more widely, such as, LED lamp tube is wherein one.

Traditional fluorescent tube is evenly soft line style divergent light source, and when the light emitting source using LED as fluorescent tube, because LED is approximate spot light, modal way is that several LEDs linear array is formed a lamp bar on substrate, a more additional lampshade forms fluorescent tube.But because the light type of LED is circular, and its light intensity is successively decreased to edge gradually by center, so LED lamp tube is not the linear light sources producing uniform light, but can form the aperture of multiple gathering, thus cause integral illumination uneven soft.In order to solve such problem, general LED lamp tube needs the numerous LED close-packed arrays of usage quantity, but can make cost increase thus.

Summary of the invention

In view of this, be necessary to provide one can reduce light emitting diode usage quantity, lens reduced costs and apply the light source module of these lens.

A kind of lens, it adjusts for the light sent light emitting diode.These lens comprise incidence surface, exiting surface and bottom surface.Described incidence surface caves in lens interior from bottom surface.Described exiting surface is positioned at the top of incidence surface, it convex surface comprising a concave surface and be positioned at these concave surface both sides.Described exiting surface has fluctuations along first direction, and the second direction along vertical first direction remains unchanged.The light type that light emitting diode produces, through the adjustment of lens, is elongated along first direction.

A kind of light source module, it comprises light emitting diode and above-mentioned lens.

In above-mentioned lens and light source module, because exiting surface has fluctuations along first direction, remain unchanged along second direction, so the adjustment of scioptics, the light that light emitting diode sends can have the diffusion of large degree in a first direction, and diffusion is in a second direction less, thus the light type that light emitting diode is produced is elongated in a first direction.When using light source module to make fluorescent tube, by light source module along first direction linear array, the diffusion of scioptics, the angle of flare in light emitting diode orientation can be increased, thus, light-emitting diode lamp tube only needs a small amount of light emitting diode of collocation can realize the illuminating effect of even bright dipping, thus is conducive to reducing costs.

Accompanying drawing explanation

Fig. 1 is the perspective view of the light source module in embodiment of the present invention.

Fig. 2 is the sectional view of the light source module in Fig. 1 along II-II direction.

Fig. 3 is the sectional view of the light source module in Fig. 1 along III-III direction.

Fig. 4 is not through the light type figure of the LED source of lens adjustment.

Fig. 5 is the light type figure of the LED source after lens adjustment.

Main element symbol description

Light source module	100
		Lens	10
Light emitting diode	20
		Incidence surface	11
Exiting surface	12
		Bottom surface	13
First side	14
		Second side	15
Groove	16
		Concave surface	121
Convex surface	122

Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Refer to Fig. 1, Fig. 2 and Fig. 3, a kind of light source module 100 that embodiment of the present invention provides comprises lens 10 and is arranged at the light emitting diode 20 in these lens 10.

Described lens 10 comprise incidence surface 11, exiting surface 12, side, bottom surface 13, two first 14 and two second sides 15.Described bottom surface 13 is a rectangular planes, and two long edge first direction X be parallel to each other of this rectangular planes are arranged, and two minor faces be parallel to each other of this rectangular planes are arranged along the second direction Y vertical with first direction X.

Described incidence surface 11 is a curved surface, and it is formed to lens 10 inner recess from the center of bottom surface 13.Described incidence surface 11 surrounds a groove 16, and the axis of incidence surface 11 overlaps with the axis of lens 10.In the present embodiment, the profile of incidence surface 11 is roughly an ellipsoid, and its minor axis is positioned in the plane at place, bottom surface 13, and major axis is vertical with bottom surface 13.

Described exiting surface 12 is roughly the curved surface of a horse-saddle, and its correspondence is positioned at the top of bottom surface 13.This exiting surface 12 comprises the concave surface 121 being positioned at central authorities and the convex surface 122 being positioned at these concave surface 121 both sides.Described concave surface 121 just to incidence surface 11, and is recessed to form towards incidence surface 11 direction, for dispersing the forward light arriving this concave surface 121.Described two convex surfaces 122 are extended to form along first direction X respectively in the opposite direction by the both sides of concave surface 121.Described convex surface 122 is towards away from the outwardly curved surface in incidence surface 11 direction, and it arrives the side direction light of this convex surface 122 for dispersing.Described convex surface 122 is in smoothing junction with described concave surface 121.Described exiting surface 12 has fluctuations along first direction X, and remains unchanged along second direction Y.In other words, the shape of described exiting surface 12 is that an aspheric curve in X-Z plane extends the curved surface formed along Y direction.The length of described exiting surface 12 on first direction X is greater than the length on second direction Y.

Described two first sides 14 are inclined plane, its respectively by the tilting upward along the dual-side on first direction X of bottom surface 13, stretch out and be connected to the edge of exiting surface 12.Described two second sides 15 are vertical plane, its extending vertically upward along the dual-side on second direction Y and being connected to the edge of exiting surface 12 respectively by bottom surface 13.The length of lens 10 on first direction X that described incidence surface 11, exiting surface 12, side, bottom surface 13, two first 14 and two second sides 15 are formed jointly is greater than the length on second direction Y.

Described light emitting diode 20 is arranged in the groove 16 of described lens 10, the optical axis coincidence of its central shaft and lens 10.

In use, the light that light emitting diode 20 sends enters into lens 10 to described light source module 100 after incidence surface 11 spreads, and is then penetrated to sideways diffusion by exiting surface 12.Because the length of lens 10 on first direction X is longer, and exiting surface 12 has fluctuations along first direction X, and when therefore light therethrough exiting surface 12 penetrates, diffusion is in the X direction larger; And due to the length of lens 10 on second direction Y shorter, and exiting surface 12 remains unchanged along second direction Y, and when therefore light therethrough exiting surface 12 penetrates, diffusion is in the Y direction less.In addition, again because the first side 14 of lens 10 is inclined plane, the side direction light of the part wide-angle therefore on directive two first side 14 can be totally reflected on the first side 14, after this some light is totally reflected by the first side 14, can reduce with the optical axis included angle of lens 10, make light diffusion in the Y direction more not remarkable thus further.The effect of scioptics 10, the light that light emitting diode 20 sends has the diffusion of large degree in the X direction, and diffusion is in the Y direction less, so the light type making light emitting diode 20 produce is through the adjustment of lens 10, be elongated diffusion in the X direction, thus change into approximate rectangular shape.

Refer to Fig. 4 and Fig. 5, Fig. 4 is the light type figure of the LED source not having lens 10, and as can be seen from the figure, whole light type is a circle.Fig. 5 is the light type figure of the LED source after lens 10 spread, and can obviously find out from figure, spread through lens 10, the light type of the generation of LED source is elongated in X direction.

When using light source module 100 to make fluorescent tube, by light source module 100 linear array in X direction, the diffusion of scioptics 10, the angle of flare in light emitting diode 20 orientation can be increased, thus the light that light-emitting diode lamp tube can be made to produce is more even, and the usage quantity of light-emitting diode light can be reduced, reduce cost.

Be understandable that, for the person of ordinary skill of the art, the change and distortion that other various picture answers can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.

Claims

1. lens, it adjusts for the light sent light emitting diode, it is characterized in that: described lens comprise incidence surface, exiting surface and bottom surface, described incidence surface caves in lens interior from bottom surface, described exiting surface is positioned at the top of incidence surface, it convex surface comprising a concave surface and be positioned at these concave surface both sides, described exiting surface has fluctuations along first direction, second direction along vertical first direction remains unchanged, the light type that light emitting diode produces, through the adjustment of lens, is elongated along first direction.

2. lens as claimed in claim 1, it is characterized in that: the concave surface of described exiting surface is just to described incidence surface, and be recessed to form towards incidence surface direction, two convex surfaces of described exiting surface are extended to form along first direction respectively in the opposite direction by the both sides of this concave surface, and described convex surface is towards away from the outwardly curved surface in direction, bottom surface.

3. lens as claimed in claim 1, it is characterized in that: described incidence surface is an ellipsoid, its minor axis is positioned in the plane at place, bottom surface, major axis and plane perpendicular, and the axis of described incidence surface overlaps with the axis of lens.

4. lens as claimed in claim 1, is characterized in that: described bottom surface is a rectangular planes, and two long edge first directions of this rectangular planes are arranged, and two minor faces are arranged along second direction.

5. lens as claimed in claim 4, it is characterized in that: described lens also comprise two first sides and two second sides, described two first sides are inclined plane, its respectively by the tilting upward along the long limit on first direction of bottom surface, stretch out and be connected to the edge of described exiting surface, described two second sides are vertical plane, its extending vertically upward along the minor face in second direction and being connected to the edge of described exiting surface respectively by bottom surface.

6. lens as claimed in claim 1, is characterized in that: described lens length is in a first direction greater than length in a second direction.

7. a light source module, it comprises light emitting diode and the lens as described in claim 1-6 any one.

8. light source module as claimed in claim 7, it is characterized in that: described incidence surface surrounds a groove, described light emitting diode is arranged in this groove.

9. light source module as claimed in claim 7, is characterized in that: the central shaft of described light emitting diode and the optical axis coincidence of described lens.