CN202188357U

CN202188357U - Led lighting module

Info

Publication number: CN202188357U
Application number: CN2011202993311U
Authority: CN
Inventors: 肖一胜; 陈伟; 周详
Original assignee: Huizhou NVC Lighting Technology Corp
Current assignee: Huizhou NVC Lighting Technology Corp; NVC Lighting Technology Corp
Priority date: 2011-08-17
Filing date: 2011-08-17
Publication date: 2012-04-11
Anticipated expiration: 2021-08-17

Abstract

The utility model relates to an LED lighting module, which includes an LED and a one-piece light-transmitting element covered on the LED and shaped as a ball table on the whole, wherein the upper bottom of the light-transmitting element is inward concaved to form an inner reflection cavity covered on the LED; the lower bottom of the light-transmitting element is also inward concaved to form an outer reflection cavity; the outer reflection cavity is defined by an outer refraction wall positioned in the middle and an outer refraction and reflection wall encircling the outer refraction wall; and the outer refraction and reflection wall is outward raised. Through adopting the LED lighting module provided by the utility model, the LED light rays are refracted, reflected and further refracted through the inner reflection cavity of the light-transmitting element, and are further initially controlled, then the light rays are further refracted and reflected through the outer reflection cavity and the side wall of the light-transmitting element, and are further controlled for the second time; and the light rays emitted from the LED can be controlled in an all-directional manner in combination with a reflective housing, so that the illumination range of the LED lighting module is remarkably enlarged, and the illumination is more uniform.

Description

The LED lighting module

Technical field

The utility model relates to LED (light emitting diode, light emitting diode) lighting module, relates in particular to a kind of LED lighting module that on the LED illumination component, adopts printing opacity single-piece auxiliary optics (lens).

Background technology

Compare with conventional light source, LED has higher luminous efficiency, also has little, the low radiation of volume, low power consumption, life-span length, the advantages such as fast that start.LED is day by day ripe in the utilization of lighting field.General LED adopts common COB (Chip On Board; Chip on board) packaged type, the light that the luminescence chip of LED sends do not carry out optical correction, can form circular hot spot; Illumination zone is very little and illumination is very inhomogeneous, can not satisfy the requirement of road lighting even domestic lighting.Now also there is the mode that before LED, increases Fresnel Lenses to improve the problem of LED light spot and bright dipping bore; But effect is not ideal; Reach at needs under the situation of better hot spot effect; Just can not do big bright dipping bore, thereby cause this type of LED exiting surface too little, defective such as the illumination outward appearance is inharmonious.

Summary of the invention

The purpose of the utility model is to provide a kind of bright dipping bore the big and uniform LED lighting module of illumination.

A kind of LED lighting module comprises LED and covers on the optics accessory system on this LED.Said optics accessory system is one and is the single-piece translucent element that rotates symmetric form; This translucent element caves inward towards the one side of said LED; Form an internal reflective cavity, cover on the LED, and allow said LED optical axial along translucent element in internal reflective cavity to move.Said translucent element is the billiard table shape substantially, and said internal reflective cavity is positioned at the upper base of billiard table.Going to the bottom of this translucent element also caves inward, and forms an external reflectance chamber.Said external reflectance chamber is limited on an outer refractive walls and the outer catadioptric wall around said outer refractive walls that is positioned at the middle part, and said outer catadioptric wall is to outer lug.Said internal reflective cavity is limited on a refractive walls and the catadioptric wall around said refractive walls that is positioned at the middle part.Part in said between refractive walls and the outer refractive walls constitutes convex lens.Part in said between the sidewall of catadioptric wall, outer catadioptric wall and billiard table constitutes the catadioptric mirror around said convex lens.Middle part light refractive walls outside said that said convex lens send said LED penetrates forward.Said catadioptric mirror makes the part of the peripheral light that said LED sends get into from interior catadioptric wall; After sidewall reflects, penetrate forward from outer catadioptric wall; Another part of the peripheral light that said LED sends is got into from interior catadioptric wall, and the back of catadioptric wall reflection outside is from the proceeds posterolateral of the said translucent element of sidewall directive.

In a preferred embodiment, said LED lighting module also comprises the reflector that is positioned at said translucent element periphery.The said wall of catadioptric outside reflection back is penetrated to the place ahead of LED lighting module in said reflector reflection back from the light of sidewall ejaculation to the proceeds posterolateral of said translucent element, constitutes uniform hot spot with the light from said translucent element ejaculation.

In a preferred embodiment, said outer refractive walls is a kind of in following: convex surface and plane.

In a preferred embodiment, refractive walls is a kind of in following in said: convex surface and plane.

In a preferred embodiment, the height of said catadioptric mirror outwards increases from the edge of said convex lens gradually.

In a preferred embodiment, the catadioptric wall is and caves inward shape or be the plane in said.

In a preferred embodiment, the submarginal annular section of the upper base of said translucent element is fixed on the said reflector.

In a preferred embodiment, said reflector is spherical substantially.

The internal reflective cavity that the LED lighting module of the utility model utilizes translucent element reflects, reflects and further refraction the light of LED; Light to LED is tentatively controlled; Sidewall through external reflectance chamber and translucent element further reflects light and reflects again, realizes the secondary control to LED light, can realize the comprehensive control that LED emits beam in conjunction with reflector; The illumination zone of LED lighting module is significantly enlarged, and illumination is more even.In addition, the curvature through each face of adjustment translucent element can realize various light-operated effects.Also have simple in structurely in addition, be easy to installation and maintenance, can improve to existing LED, adaptive.

Description of drawings

Fig. 1 is the profile of the LED lighting module of an embodiment.

Fig. 2 is the stereogram of LED lighting module among Fig. 1.

Fig. 3 is the profile of translucent element among Fig. 1.

Fig. 4 is the luminous sketch map of LED lighting module among Fig. 1.

Fig. 5 is the distribution curve flux figure of LED lighting module among Fig. 1.

Fig. 6 and Fig. 7 are the hot spot figure of LED lighting module among Fig. 1.

Fig. 8 is the luminous sketch map of LED lighting module among another embodiment.

Fig. 9 is the luminous sketch map of LED lighting module among the another embodiment.

The specific embodiment

To combine specific embodiment and accompanying drawing that the utility model LED lighting module is described in further detail below.

As depicted in figs. 1 and 2, among the embodiment, the LED lighting module of the utility model comprises led module 10, is fixed on the reflector 20 of led module 10 peripheries and covers on the translucent element 30 on the led module 10.All light processes that led module 10 sends are as the catadioptric adjustment of the translucent element 30 of optics accessory system, and part directly penetrates the LED lighting module, and the LED lighting modules are penetrated in part process reflector 20 reflection backs in addition.

This led module 10 comprises LED (semiconductor light sources element) 11 and the substrate 13 that is used for fixing LED 11.Reflector 20 is spherical crown shape (also can be described as bowl-shape) substantially, and inner surface is provided with specular layer, and the bottom has the through hole that allows LED 11 to stretch out.Reflector 20 bottoms are fixed on the substrate 13 near the position of this through hole.

Translucent element 30 is the billiard table shape substantially, and is the rotation symmetric form, and the submarginal annular section of the upper base that its radius is less is fixed on the reflector 20.Upper base caves inward near the part at center, forms an internal reflective cavity 31, covers on the LED 11, and allows LED 11 optical axial along translucent element in internal reflective cavity 31 to move.Going to the bottom of translucent element 30 caves inward from the edge, forms an external reflectance chamber 32.And inside and

outside reflection cavity

31,32 is not connected.

Simultaneously with reference to figure 1 and Fig. 3, internal reflective cavity 31 by be positioned at the middle part, be the plane of refraction 33 of circular-arc summary to outer process, and limit around the interior catadioptric wall 34 of interior plane of refraction 33.In the present embodiment, interior catadioptric wall 34 is the shape that caves inward.External reflectance chamber 32 by be positioned at the middle part, be the outer plane of refraction 35 of circular-arc summary to outer process, and surround around the outer catadioptric wall 36 of outer plane of refraction 35.In the present embodiment, outer catadioptric wall 36 is circular-arc outside convex, but the height of projection is no more than the edge of going to the bottom.It seems on the whole, the middle part of translucent element 30 (seeing the part that dotted line A frame is lived among Fig. 3), the part between promptly interior refractive walls 33 and the outer refractive walls 35 constitutes convex lens, is labeled as A at this, is used to control the diversity of said LED middle part light.And around the periphery (seeing the part that dotted line B frame is lived among Fig. 3) at middle part; Part promptly between the sidewall 37 of catadioptric wall 34, outer catadioptric wall 36 and billiard table constitutes a catadioptric mirror; Be labeled as B at this, be used to control the diversity of LED 11 outer beams.The height of catadioptric mirror B (this is meant that highly upper base is to the height of going to the bottom) outwards increases from the middle part gradually.The sidewall 37 of translucent element 30 also is the smooth curved surface to outer lug, and it cooperates with reflector 20, between translucent element 30 and reflector 20, forms a reflected light control district.

Understandable, the curvature of the curvature of each face of translucent element 30 and reflector 20 should cooperatively interact, and makes it in working order down, and the light that LED 11 is penetrated all will pass through convex lens A, catadioptric mirror B adjusts in two light control functionality zones.Concrete, convex lens A makes the middle part light that LED 11 sends (also promptly be positioned at and near the light of the optical axial of translucent element 30) illumination range enlarge and penetrates forward equably; Catadioptric mirror B makes the part of the peripheral light that LED 11 sends get into from interior catadioptric wall 34; Penetrate forward from outer catadioptric wall 36 in sidewall 37 reflection backs; Another part of the peripheral light that LED 11 sends is got into from interior catadioptric wall 34, and catadioptric wall 36 reflection backs are from sidewall 37 directive reflectors 20 outside.Reflector 20 should make from the light of its surface reflection and penetrate forward, and constitutes uniform hot spot with the light that penetrates from translucent element 30.The LED lighting module of present embodiment proves through simulation test, can obtain bigger, very uniform hot spot, and is extremely shown in Figure 7 like Fig. 5.

More specifically, as shown in Figure 4, the light that LED 11 middle parts are penetrated is through internal reflective cavity 31; Carry out the refraction first time in interior refractive walls 34; And get in the translucent element 30, after one section predeterminable range, through outside refractive walls 35 move forward into the illumination target zone after carrying out reflecting the second time.Wherein this predeterminable range is the distance between outer refractive walls 35 and the interior refractive walls 33; Can control the irradiant diversity in LED 11 middle parts through the adjustment of this distance; And this distance can be adjusted according to actual needs; But adjustment that should distance must match with the curve form of outer refractive walls 35 with interior refractive walls 33, form differently focus on, different scattering angles go out light effect.For example, outer refractive walls 35 can be adjusted with adaption demand for concave, convex, flat three kinds of different permutation and combination methods of shape with interior refractive walls 33, and is not limited only to the outside convex shape in the present embodiment.Like Fig. 8 and shown in Figure 9, the middle part of going to the bottom of translucent element is the plane, and the middle part of upper base is a convex surface.Cooperate the adjustment adjustment of focal length (promptly as) of distance between the two can reach the big exiting surface and the hot spot effect of uniform of demand again.

The main light of LED 11 except that the light of middle part all will get into catadioptric mirror B.Specifically, the peripheral light of LED 11 except that the middle part all will be through internal reflective cavity 31, and reflect and reflect at interior catadioptric wall 34, and the catadioptric direction guiding of presetting for the light on this wall of directive.

The peripheral light of catadioptric wall 34 in LED 11 directives wherein; Because the difference of incident angle mainly is divided into two paths, wherein the light of a part will reflect through interior catadioptric wall 34; Directive sidewall 38; On sidewall 38, carry out total reflection, make this inject light and reflex on the outer catadioptric wall 36, the LED lighting module is penetrated in the refraction back on the catadioptric wall 36 outside.

And the light of catadioptric wall 34 will reflect through interior catadioptric wall 34 in another part directive; Directly the outer catadioptric wall 36 of directive produce the total reflection effect, and this moment is through this total reflection effect; This ejaculation direction of injecting light is adjusted; And this light is reflexed on the sidewall 37, and reflect back ejaculation translucent element 30, and directive reflector 20.By reflector 20, this part light is through invest preset irradiation area after the reflection once more.

In sum; The light catadioptric angle of catadioptric mirror B and direction can be adjusted through the curvature of catadioptric wall 34, sidewall 37, outer catadioptric wall 36 in changing accordingly; With the irradiant catadioptric direction except that middle part light of control, the light of this part can be controlled through two kinds of channels from LED 11:

The first, B directly penetrates through the catadioptric mirror, with according to the irradiate light zone, directly controls the irradiant irradiating angle and the direction of this part by this;

The second, through carrying out minute surface reflection on catadioptric mirror B refracted ray to the reflector 20, enlarge exiting surface by this, enlarge range of exposures, realize that illumination is all even to do big exiting surface.

For example; Face between the annular section of the upper base of translucent element and the middle part of upper base (catadioptric wall promptly) can be flat (as shown in Figure 8); Or the folding that bends inwards planar (as shown in Figure 9), sidewall can be flat, all can accomplish big exiting surface and hot spot effect of uniform.

From the above mentioned, all the ejaculation light to LED carry out complete light-operated adjustment by this, can increase the exiting surface of LED lighting module, the hot spot of simultaneously even LED.Not only can realize wide-angle, the optical effect of big exiting surface especially can also be realized low-angle, and the effect of big exiting surface has remedied the birth defect of existing COB packaged LED structure.

The LED lighting module of the utility model is simple in structure, is easy to installation and maintenance, can improve to existing LED, adaptive.Because translucent element is made simple, processing cost is lower, helps volume production.

Though the description to the utility model combines specific embodiment to carry out,, those skilled in the art that can carry out many replacements, modification and variation according to above-mentioned content, be conspicuous.Therefore, all are such substitute, improve and change all is included in the spirit and scope of attached claim.

Claims

1. LED lighting module; Comprise LED and cover on the optics accessory system on this LED; Said optics accessory system is one and is the single-piece translucent element that rotates symmetric form that this translucent element caves inward towards the one side of said LED, forms an internal reflective cavity; Cover on the LED, and allow said LED optical axial along translucent element in internal reflective cavity to move; It is characterized in that: said translucent element is the billiard table shape substantially, and said internal reflective cavity is positioned at the upper base of billiard table; Going to the bottom of this translucent element also caves inward, and forms an external reflectance chamber; Said external reflectance chamber is limited on an outer refractive walls and the outer catadioptric wall around said outer refractive walls that is positioned at the middle part, and said outer catadioptric wall is to outer lug; Said internal reflective cavity is limited on a refractive walls and the catadioptric wall around said refractive walls that is positioned at the middle part; Part in said between refractive walls and the outer refractive walls constitutes convex lens; Part in said between the sidewall of catadioptric wall, outer catadioptric wall and billiard table constitutes the catadioptric mirror around said convex lens; Middle part light refractive walls outside said that said convex lens send said LED penetrates forward; Said catadioptric mirror makes the part of the peripheral light that said LED sends get into from interior catadioptric wall; After sidewall reflects, penetrate forward from outer catadioptric wall; Another part of the peripheral light that said LED sends is got into from interior catadioptric wall, and the back of catadioptric wall reflection outside is from the proceeds posterolateral of the said translucent element of sidewall directive.

2. LED lighting module according to claim 1; It is characterized in that; Also comprise and be positioned at the peripheral reflector of said translucent element; The said wall of catadioptric outside reflection back is penetrated to the place ahead of LED lighting module in said reflector reflection back from the light of sidewall ejaculation to the proceeds posterolateral of said translucent element, constitutes uniform hot spot with the light from said translucent element ejaculation.

3. LED lighting module according to claim 2 is characterized in that, said outer refractive walls is a kind of in following: convex surface and plane.

4. LED lighting module according to claim 2 is characterized in that, said in refractive walls be a kind of in following: convex surface and plane.

5. LED lighting module according to claim 2 is characterized in that, the height of said catadioptric mirror outwards increases from the edge of said convex lens gradually.

6. LED lighting module according to claim 4 is characterized in that, said in the catadioptric wall be the shape or for the plane of caving inward.

7. LED lighting module according to claim 5 is characterized in that, the submarginal annular section of the upper base of said translucent element is fixed on the said reflector.

8. according to each described LED lighting module in the claim 1 to 7, it is characterized in that it is spherical that said reflector is substantially.