CN102705775A

CN102705775A - Led light source module and lens thereof

Info

Publication number: CN102705775A
Application number: CN2012101321890A
Authority: CN
Inventors: 黄敏
Original assignee: ZHAOCHI CO Ltd SHENZHEN
Current assignee: ZHAOCHI CO Ltd SHENZHEN
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2012-10-03

Abstract

An embodiment of the invention discloses an LED light source module and a lens thereof. A first side of the lens is provided with a concave which concaves towards the interior of the lens, the concave is used for accommodating a light source, the concave wall forms an incident plane of the lens, and a second side of the lens, connected with the first side, is a convex smooth curve which forms an exit plane of the lens. A reflection plane for reflecting lights to the exit plane is jointly formed by the concave surrounded by first side and pyramid walls of a plurality of pyramid concaves which concave from the first side to the interior of the lens. For the lens of the embodiment of the LED light source module, since the reflection plane for reflecting lights to the exit plane is jointly form by the concave surrounded by first side and pyramid walls of pyramid concaves which concave from the first side to the interior of the lens, the light emitted to the first side can be emitted after being reflected from each angle to the second side, so that technical effect for uniform light is achieved.

Description

Led light source module and lens thereof

Technical field

The present invention relates to optical technical field, relate in particular to a kind of led light source module and lens thereof.

Background technology

Light emitting diode (Light Emitting Diode, LED) low in energy consumption because of having, the life-span is long, volume is little and characteristic such as brightness height has been widely applied to many fields.

LED light source module can be divided into two kinds of straight-down negative and side-light types by the difference of the distributing position of its semiconductor light-emitting elements LED; And the LED light source module of existing straight-down negative improves light utilization through lenticule is set above LED; Said lenticular bottom surface is smooth and be similar to plane mirror; Cause the reflection angle of internal light single, there is the uneven defective of bright dipping in light reflected after exit facet penetrates.

Summary of the invention

Embodiment of the invention technical problem to be solved is, a kind of lens of bright dipping uniformity are provided.

The further technical problem to be solved of the embodiment of the invention is, a kind of led light source module of bright dipping uniformity is provided.

In order to solve the problems of the technologies described above; The embodiment of the invention has proposed a kind of lens; First side of said lens is provided with to the pit of lens internal recess with ccontaining light source; The hole wall of pit constitutes the plane of incidence of lens, and second side that is connected in first side of lens is the smooth surface of evagination, and said smooth surface constitutes the exit facet of lens; Said first side also is formed with the reflecting surface of light reflection to exit facet around said pit, and said reflecting surface is made up of a plurality of awl walls that cave in to the pyramid-shaped of lens internal recess from first side jointly.

Further, the pyramid-shaped depression is tetrapyamid shape or triangular taper.

Further, the depression of the pyramid-shaped on said first side is a plurality of concentric ring-shaped arrangements.

Further, be arranged in pyramid-shaped concave shape in the same annulus and measure-alike, and big more from the floor space of the pyramid-shaped depression of distance of center circle in big more donut.

Further, the recessed deep equality of the depression of the pyramid-shaped in each donut.

Further, first side around evenly be provided with a plurality of legs.

Further, it is recessed also to be the spherical crown shape to the lens middle part in the middle part of the said smooth surface.

Further, said smooth surface is the axisymmetric curved surface in center.

Correspondingly, the embodiment of the invention also provides a kind of led light source module, comprises led light source and covers in the outside aforesaid lens of led light source.

The led light source module of the embodiment of the invention and the beneficial effect of lens thereof are: also form the reflecting surface of light reflection to exit facet around said pit through being employed in first side; The technological means that said reflecting surface is made up of a plurality of awl walls that cave in to the pyramid-shaped of lens internal recess from first side jointly; Thereby the light of directive first side is reflexed to second side and penetrates from all angles, reach the technique effect of bright dipping uniformity.

Description of drawings

Fig. 1 is the plan structure sketch map of the lens of the embodiment of the invention.

Fig. 2 is the structural representation of another angle of the lens of the embodiment of the invention.

Fig. 3 be the embodiment of the invention lens look up structural representation.

Fig. 4 is the structural representation of another angle of the lens of the embodiment of the invention.

Fig. 5 is the generalized section of Fig. 1 along the I-I direction.

Fig. 6 is the light path sketch map of the led light source module of the embodiment of the invention.

The specific embodiment

Please refer to Fig. 1 ~ Fig. 5, the embodiment of the invention provides a kind of lens, roughly is hemispherical, has a central shaft oo ', is processed by transparent material, and this material can be polypropylene acid formicester, polycarbonate or this acid propylene of carbon acetate.Said lens comprise first side 10 and second side 20 that is connected in first side 10.

First side 10 is the frosted cloudy surface of annular, and this frosted cloudy surface is beneficial to and strengthens catoptrical uniformity and the generation that prevents glare phenomenon.The middle part is provided with to the pit 11 of lens internal recess with ccontaining light source, and the hole wall of pit 11 constitutes the plane of incidence of lens.Said first side 10 also is formed with the reflecting surface of light reflection to exit facet around said pit 11, and the awl wall to the pyramid-shaped depression 13 of lens internal recess constitutes said reflecting surface jointly from first side 10 by a plurality of.Said reflecting surface is used to strengthen the light-emitting uniformity of second side 20, and particularly, the shooting angle of the adjustable lay the grain of awl wall of pyramid-shaped depression 13 and the radiation profiles characteristic of emergent light make the light outgoing even, shadow-free (specifically seeing also follow-up light path describes).Pyramid-shaped depression 13 is a plurality of concentric ring-shaped and arranges.The recessed deep equality of pyramid-shaped in each donut depression 13 is arranged in pyramid-shaped in the same annulus 13 shapes and measure-alike that cave in, and big more from the floor space of the pyramid-shaped depression 13 of distance of center circle in big more donut.Pyramid-shaped depression 13 in adjacent two donuts is corresponding one by one to be provided with.In the present embodiment, pyramid-shaped depression 13 is and is similar to pyramidal tetrapyamid shape, it is understandable that pyramid-shaped depression 13 also can be other shape, like triangular taper.

Evenly be provided with a plurality of legs 15 around first side 10, leg 15 is used for lens are fixed to the correspondence position of circuit board.Leg 15 can be 2～5, and in this embodiment, leg 15 is preferably 3.

Second side 20 is the smooth surface of evagination, and said smooth surface constitutes the exit facet of lens, and said smooth surface is the curved surface about central shaft oo ' symmetry.Said smooth surface middle part also is the recessed first anti-/ plane of refraction 21 that forms of spherical crown shape to the lens middle part, forms second anti-/ plane of refraction 23 between the first anti-/ plane of refraction 21 and first side 10 and be connected in.Said first anti-/ plane of refraction 21, second anti-/ plane of refraction 23 and first side 10 are to be the symmetrical structure of axle with central shaft oo '.

The embodiment of the invention also provides a kind of led light source module that uses said lens; The led light source module is used for backlight or lighting; Comprise led light source 30 and cover in the outside aforesaid lens of led light source 30; Particularly, be equipped with the led light source 30 with its coupling in the pit 11, led light source 30 also is positioned on the central axis oo '.

Please refer to Fig. 6; When the light that sends from LED is incident upon first anti-/ plane of refraction 21 and second anti-/ plane of refraction 23 by the plane of incidence; Since first anti-/ plane of refraction 21 with second instead/plane of refraction 23 corresponding reflectings surface the total reflection effect; The pyramid-shaped depression 13 that part anaclasis and going out, most of light are reflected onto 10, the first sides 10, first side just break up the light that reflects back and reflex to again first anti-/ plane of refraction 21 with second instead/plane of refraction 23 and penetrating; And said shape, size and the arrangement architecture of pyramid-shaped depression 13 make and are evenly distributed shadow-free through the light that first anti-/ plane of refraction 21 and second anti-/ plane of refraction 23 penetrates.Through test, the led light source module of the embodiment of the invention can with the average intensity angle of flare θ of light emitting diode by original+/-60 ° be diffused into+/-70 °.

The above is the specific embodiment 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 improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.

Claims

1. lens; First side of said lens is provided with to the pit of lens internal recess with ccontaining light source; The hole wall of pit constitutes the plane of incidence of lens; Second side that is connected in first side of lens is the smooth surface of evagination, and said smooth surface constitutes the exit facet of lens, it is characterized in that; Said first side also is formed with the reflecting surface of light reflection to exit facet around said pit, and said reflecting surface is made up of a plurality of awl walls that cave in to the pyramid-shaped of lens internal recess from first side jointly.

2. lens as claimed in claim 1 is characterized in that, the pyramid-shaped depression is tetrapyamid shape or triangular taper.

3. lens as claimed in claim 1 is characterized in that, the pyramid-shaped depression on said first side is a plurality of concentric ring-shaped and arranges.

4. lens as claimed in claim 3 is characterized in that, are arranged in pyramid-shaped concave shape in the same annulus and measure-alike, and big more from the floor space of the pyramid-shaped depression of distance of center circle in big more donut.

5. lens as claimed in claim 4 is characterized in that, the recessed deep equality of the pyramid-shaped depression in each donut.

6. lens as claimed in claim 1 is characterized in that, evenly are provided with a plurality of legs around first side.

7. lens as claimed in claim 1 is characterized in that, it is recessed that said smooth surface middle part also is the spherical crown shape to the lens middle part.

8. lens as claimed in claim 7 is characterized in that, said smooth surface is the axisymmetric curved surface in center.

9. a led light source module comprises led light source and covers in the outside lens of led light source, it is characterized in that said lens are like each described lens in the claim 1 ~ 8.