CN102287653B - LED (light emitting diode) lightening module and light control method thereof - Google Patents
LED (light emitting diode) lightening module and light control method thereof Download PDFInfo
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- CN102287653B CN102287653B CN 201110236038 CN201110236038A CN102287653B CN 102287653 B CN102287653 B CN 102287653B CN 201110236038 CN201110236038 CN 201110236038 CN 201110236038 A CN201110236038 A CN 201110236038A CN 102287653 B CN102287653 B CN 102287653B
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Abstract
The invention relates to an LED (light emitting diode) lightening module which comprises an LED and a one-piece transmitting component which is table-shaped generally and covered on the LED, wherein the upper bottom of the transmitting component is inward sunken to form an internal reflection cavity so as to cover the LED; the lower bottom of the transmitting component is inward sunken to form an external reflection cavity; and the external reflection cavity is limited by an external refraction wall on the middle part of the external reflection cavity and an external catadioptric wall surrounded on the external refraction wall, and the external catadioptric wall is protruded outward. The LED lightening module in the invention utilizes the internal reflection cavity of the transmitting component to carry out refraction, reflection and refraction on the LED ray, the LED ray is subjected to primary control, and the ray is further subjected to refraction and reflection by virtue of the side walls of the external reflection cavity and the transmitting component, thereby realizing secondary control on the LED ray; a reflector is combined to realize the omnibearing control on the rays emitted by the LED; and the lighting rang of the LED lightening module is obviously enlarged, and the illumination is more uniform.
Description
Technical field
The present invention relates to LED(light emitting diode, light emitting diode) lighting module, relate in particular to a kind of LED lighting module and light-operated method thereof 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 object of the present invention is to provide the big and uniform LED lighting module of illumination of a kind of bright dipping bore.
A kind of LED lighting module comprises LED and covers on optics accessory system on this LED.Described 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 described LED, form an internal reflective cavity, cover on the LED, and allow described LED optical axial along translucent element in internal reflective cavity to move.Described translucent element is the billiard table shape substantially, and described 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.Described external reflectance chamber is limited by an outer refractive walls and the outer catadioptric wall around described outer refractive walls that is positioned at the middle part, and described outer catadioptric wall is to outer lug.Described internal reflective cavity is limited by a refractive walls and the invagination reflecting wall around described refractive walls that is positioned at the middle part.Part in described between refractive walls and the outer refractive walls constitutes convex lens.Part between the sidewall of described invagination reflecting wall, outer catadioptric wall and billiard table constitutes the catadioptric mirror around described convex lens.Middle part light refractive walls outside described that described convex lens send described LED penetrates forward.Described catadioptric mirror makes the part of the peripheral light that described LED sends enter from the invagination reflecting wall, after sidewall reflects, penetrate forward from outer catadioptric wall, another part of the peripheral light that described LED sends is entered from the invagination reflecting wall, and the back of catadioptric wall reflection outside is from the proceeds posterolateral of the described translucent element of sidewall directive.
In a preferred embodiment, described LED lighting module also comprises the reflector that is positioned at described translucent element periphery.The light of the described wall of catadioptric outside reflection back from the sidewall ejaculation to the proceeds posterolateral of described translucent element penetrates to the place ahead of LED lighting module in described reflector reflection back, constitutes uniform hot spot with the light from described translucent element ejaculation.
In a preferred embodiment, described 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 described: convex surface and plane.
In a preferred embodiment, the height of described catadioptric mirror outwards increases gradually from the edge of described convex lens.
In a preferred embodiment, described invagination reflecting wall is the shape or for the plane of caving inward.
In a preferred embodiment, the submarginal annular section of the upper base of described translucent element is fixed on the described reflector.
In a preferred embodiment, described reflector is spherical substantially.
The present invention also aims to provide a kind of illumination zone the big and uniform light-operated method of illumination, comprise step: convex lens are provided above LED, LED is positioned on the optical axial of convex lens, described convex lens are adjusted the middle part light that LED sends; And provide a rotational symmetric catadioptric mirror in the periphery of described convex lens, this catadioptric mirror is used for the peripheral light that described LED sends is adjusted, and one-body molded with described convex lens, described catadioptric mirror comprise the opposing outer catadioptric wall of an invagination reflecting wall, and invagination reflecting wall towards LED be connected the invagination reflecting wall and outside the sidewall of catadioptric wall.Wherein, the part of the peripheral light that described LED sends enters from the invagination reflecting wall, after sidewall reflects, penetrate forward from outer catadioptric wall, another part of the peripheral light that described LED sends is entered from the invagination reflecting wall, and the back of catadioptric wall reflection is outside penetrated from the proceeds posterolateral of sidewall to described translucent element.
In a preferred embodiment, also be included in the step that described catadioptric mirror periphery provides a reflector, the described wall of catadioptric outside reflection back is penetrated forward after described reflector reflection from the light of sidewall to the proceeds posterolateral ejaculation of described translucent element.
The internal reflective cavity that LED lighting module of the present invention utilizes translucent element reflects, reflects and further refraction the light of LED, light to LED is tentatively controlled, sidewall by external reflectance chamber and translucent element further reflects light and reflects again, realization is to the secondary control of 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, by adjusting the curvature of each face of translucent element, can realize various light-operated effects.Also have simple in structurely in addition, be easy to installation and maintenance, can improve at 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 schematic diagram 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 schematic diagram of LED lighting module among another embodiment.
Fig. 9 is the luminous schematic diagram of LED lighting module among the another embodiment.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing LED lighting module of the present invention and light-operated method thereof are described in further detail.
As depicted in figs. 1 and 2, among the embodiment, LED lighting module of the present invention comprises led module 10, be fixed on the reflector 20 of led module 10 peripheries and cover on 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, partly reflects the back through reflector 20 in addition and penetrates the LED lighting modules.
This led module 10 comprises LED(semiconductor light sources element) 11 and be used for fixing the substrate 13 of 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.
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 invagination reflecting wall 34 of interior plane of refraction 33.In the present embodiment, invagination reflecting 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 described LED middle part light.And around the periphery (seeing the part that dotted line B frame is lived among Fig. 3) at middle part, be that part between the sidewall 37 of invagination reflecting 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 gradually from the middle part.The sidewall 37 of translucent element 30 also is the smooth curved surface to outer lug, and it cooperates with reflector 20, forms a reflected light control district between translucent element 30 and reflector 20.
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 LED 11 emitted light all will be adjusted in two light control functionality zones through convex lens A, catadioptric mirror B.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 enter from invagination reflecting 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 entered from invagination reflecting 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 as 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 enter in the translucent element 30, after one section predeterminable range, through outside refractive walls 35 carry out moving forward into the illumination target zone after the second time refraction.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 by 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.As 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 enter catadioptric mirror B.Specifically, the peripheral light of LED 11 except that the middle part all will be by internal reflective cavity 31, and reflect and reflect at invagination reflecting wall 34, and the catadioptric direction guiding of presetting for the light on this wall of directive.
The peripheral light of LED 11 directive invagination reflecting walls 34 wherein, because the difference of incident angle, mainly be divided into two paths, wherein Yi Bufen light will reflect by invagination reflecting wall 34, directive sidewall 38, carry out total reflection on sidewall 38, 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 another part directive invagination reflecting wall 34 will reflect by invagination reflecting wall 34, the outer catadioptric wall 36 of direct directive, produce the total reflection effect, and this moment is by 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 investing default irradiation area after the reflection once more.
In sum, the light catadioptric angle of catadioptric mirror B and direction can be adjusted accordingly by the curvature that changes invagination reflecting wall 34, sidewall 37, outer catadioptric wall 36, with the irradiant catadioptric direction except that middle part light of control, the light of this part can be controlled by two kinds of channels from LED 11:
The first, B directly penetrates by the catadioptric mirror, with according to the light irradiation area, directly controls the irradiant irradiating angle and the direction of this part by this;
The second, carry out the minute surface reflection to the reflector 20 by catadioptric mirror B refracted ray, 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 (being the invagination reflecting wall) 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.
LED lighting module of the present invention is simple in structure, is easy to installation and maintenance, can improve at existing LED, adaptive.Because translucent element is made simple, processing cost is lower, helps volume production.
Though the description of this invention carries out in conjunction with above five specific embodiments,, those skilled in the art that can carry out many replacements, modifications and variations, be conspicuous according to above-mentioned content.Therefore, all are such substitute, improve and change all is included in the spirit and scope of attached claim.
Claims (1)
1. LED lighting module, comprise LED and cover on optics accessory system on this LED, described 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 described LED, form an internal reflective cavity, cover on the LED, and allow described LED optical axial along translucent element in internal reflective cavity to move; It is characterized in that: described translucent element is the billiard table shape substantially, and described 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; Described external reflectance chamber is limited by an outer refractive walls and the outer catadioptric wall around described outer refractive walls that is positioned at the middle part, and described outer catadioptric wall is to outer lug; Described internal reflective cavity is limited by a refractive walls and the invagination reflecting wall around described refractive walls that is positioned at the middle part; Part in described between refractive walls and the outer refractive walls constitutes convex lens; Part between the sidewall of described invagination reflecting wall, outer catadioptric wall and billiard table constitutes the catadioptric mirror around described convex lens; Middle part light refractive walls outside described that described convex lens send described LED penetrates forward; Described catadioptric mirror makes the part of the peripheral light that described LED sends enter from the invagination reflecting wall, after sidewall reflects, penetrate forward from outer catadioptric wall, another part of the peripheral light that described LED sends is entered from the invagination reflecting wall, and the back of catadioptric wall reflection outside is from the proceeds posterolateral of the described translucent element of sidewall directive.
2, LED lighting module according to claim 1, it is characterized in that, also comprise the reflector that is positioned at described translucent element periphery, the light of the described wall of catadioptric outside reflection back from the sidewall ejaculation to the proceeds posterolateral of described translucent element penetrates to the place ahead of LED lighting module in described reflector reflection back, constitutes uniform hot spot with the light from described translucent element ejaculation.
3, LED lighting module according to claim 2 is characterized in that, described 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, described 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 described catadioptric mirror outwards increases gradually from the edge of described convex lens.
6, LED lighting module according to claim 4 is characterized in that, described invagination reflecting wall is 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 described translucent element is fixed on the described reflector.
8, according to each described LED lighting module in the claim 1 to 7, it is characterized in that it is spherical that described reflector is substantially.
9, a kind of light-operated method is characterized in that, comprising:
Convex lens are provided above LED, LED is positioned on the optical axial of convex lens, described convex lens are adjusted the middle part light that LED sends; And
A rotational symmetric catadioptric mirror is provided in the periphery of described convex lens, this catadioptric mirror is used for the peripheral light that described LED sends is adjusted, and one-body molded with described convex lens, described catadioptric mirror comprise the opposing outer catadioptric wall of an invagination reflecting wall, and invagination reflecting wall towards LED be connected the invagination reflecting wall and outside the sidewall of catadioptric wall;
Wherein, the part of the peripheral light that described LED sends enters from the invagination reflecting wall, after sidewall reflects, penetrate forward from outer catadioptric wall, another part of the peripheral light that described LED sends is entered from the invagination reflecting wall, and the back of catadioptric wall reflection is outside penetrated from the proceeds posterolateral of sidewall to described catadioptric mirror.
10, light-operated method according to claim 9, it is characterized in that, also be included in described catadioptric mirror periphery the step of a reflector is provided, the described wall of catadioptric outside reflection back is penetrated forward after described reflector reflection to the light that the proceeds posterolateral of described catadioptric mirror penetrates from sidewall.
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| CN 201110236038 CN102287653B (en) | 2011-08-17 | 2011-08-17 | LED (light emitting diode) lightening module and light control method thereof |
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| CN 201110236038 CN102287653B (en) | 2011-08-17 | 2011-08-17 | LED (light emitting diode) lightening module and light control method thereof |
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| CN102287653B true CN102287653B (en) | 2013-07-31 |
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| CN103322513B (en) * | 2012-03-23 | 2015-08-12 | 大连工业大学 | Hybrid catadioptric emitter and the using method thereof of ring-shaped light spot is produced for LED |
| CN103672490B (en) * | 2012-09-26 | 2016-03-30 | 比亚迪股份有限公司 | A kind of LEDbulb lamp |
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| CN201100560Y (en) * | 2007-09-14 | 2008-08-13 | 北京工业大学 | High-power LED road lamp |
| CN201100585Y (en) * | 2007-09-12 | 2008-08-13 | 林鸿飞 | LED focused lamp cover |
| CN101551076A (en) * | 2009-04-24 | 2009-10-07 | 深圳市阳光富源科技有限公司 | LED road lamp |
| CN202188357U (en) * | 2011-08-17 | 2012-04-11 | 惠州雷士光电科技有限公司 | Led lighting module |
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2011
- 2011-08-17 CN CN 201110236038 patent/CN102287653B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201100585Y (en) * | 2007-09-12 | 2008-08-13 | 林鸿飞 | LED focused lamp cover |
| CN201100560Y (en) * | 2007-09-14 | 2008-08-13 | 北京工业大学 | High-power LED road lamp |
| CN101551076A (en) * | 2009-04-24 | 2009-10-07 | 深圳市阳光富源科技有限公司 | LED road lamp |
| CN202188357U (en) * | 2011-08-17 | 2012-04-11 | 惠州雷士光电科技有限公司 | Led lighting module |
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