CN103148382A - LED (light emitting diode) luminous module - Google Patents
LED (light emitting diode) luminous module Download PDFInfo
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- CN103148382A CN103148382A CN2013100497931A CN201310049793A CN103148382A CN 103148382 A CN103148382 A CN 103148382A CN 2013100497931 A CN2013100497931 A CN 2013100497931A CN 201310049793 A CN201310049793 A CN 201310049793A CN 103148382 A CN103148382 A CN 103148382A
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Abstract
The invention provides an LED luminous model, which comprises a first LED light source and a photoconductive component, wherein the first LED light source is located on a first side of the photoconductive component; a first spotlight component is arranged on a light path of the first LED light source; a first divergence component is arranged at an emergence end of the first spotlight component and provided with a first incidence plane close to the first spotlight component and a first emergence plane opposite to the first incidence plane; the first incidence plane is provided with a first inclined plane which is inclined upwards and a second inclined plane which is inclined downwards; the photoconductive component is arranged on the outer side of the first emergence plane and further provided with a light reflecting plane and a light transmitting plane opposite to the light reflecting plane; the light reflecting plane is located at the lower end of the photoconductive component; the light transmitting plane is located at the upper end of the photoconductive component; and the light reflecting plane is provided with a plurality of first light reflecting planes upwards inclined. The LED luminous module provided by the invention can convert an LED point light source into an area light source which emits light uniformly, the production cost is low, and the lighting requirements of lamps for automobiles are met.
Description
Technical field
The present invention relates to lighting field, specifically, relate to a kind of LED light emitting module that uses LED light source to make.
Background technology
LED light source has the advantages such as energy-conserving and environment-protective, consumed power are low, long service life, has been widely used in the fields such as illumination, signal designation and decoration.Existing lamps for vehicle is the LED car light that uses LED light source mostly, as be arranged on high beam, dipped headlights, the clearance lamps of automobile head, perhaps the side marker light of automobile, daytime portable lighter etc., mostly be provided with LED chip and use light excitated fluorescent powder that LED chip sends to form the light source of different colours.In addition, LED light source also is applied in room lighting, street lamp, the multiple occasion of emergency light.
Common LED car light has LED light source, and the light distribution device such as reflector etc. is set at the LED light source front end, is used for changing the direction of the light of LED light source outgoing, makes the place that light shines to be needed.Yet because LED light source is spot light, existing LED car light only uses reflector etc. to realize that luminous intensity distribution can't realize the effect of flat light source or strip-shaped light source, and existing LED car light is luminous and inhomogeneous, easily produces dazzle, affects traffic safety.
Therefore, notification number is that the Chinese utility model patent of CN201803325U discloses the innovation and creation of " a kind of vehicle-used signal lamp photoconductive tube " by name, the LED light source assembly that it has the photoconductive tube of a strip and is arranged on the photoconductive tube two ends, photoconductive tube uses the PC material to make, it is transparent light transmissive material, so light can be propagated in photoconductive tube.And, being provided with laciniation on the bottom surface of photoconductive tube, light incides on the face of laciniation and forms in reflection and back light conduit.Simultaneously, it is circular that this photoconductive tube roughly is, and purpose is to form total reflection after the part reflection ray is incided the inwall of photoconductive tube, makes light can continue to propagate in photoconductive tube.Therefore, these innovation and creation are entirely lightings that light constantly reflects in photoconductive tube, total reflection realizes photoconductive tube that the LED light source assembly is produced.
But, because light need to Multi reflection, total reflection in photoconductive tube, along with the number of times of light reflection and total reflection increases, the light ray energy decay is more and more serious, cause near place, photoconductive tube two ends, namely bright and clear near LED light source assembly place, light comparatively, and at the middle part of photoconductive tube, because the light ray energy decay is severe, form the dark space, cause the photoconductive tube non-uniform light, bring restriction for the use of photoconductive tube.
In addition, because the LED light source assembly is spot light, its light that sends is to the surrounding scattering, and the light that above-mentioned photoconductive tube does not send the LED light source assembly carries out optically focused to be processed, and causes optical energy loss.Therefore, as need the middle part brightness of photoconductive tube higher, need to use the LED light source assembly at high-power LED chip manufacturing photoconductive tube two ends, increase its production cost, also brought the problem of LED chip heat radiation.
Summary of the invention
Main purpose of the present invention is to provide a kind of LED light emitting module that the LED spot light is converted to luminous uniform flat light source.
Another object of the present invention is to provide the LED light emitting module that a kind of utilization ratio of optical energy is high and production cost is low.
in order to realize above-mentioned main purpose, LED light emitting module provided by the invention comprises the first LED light source and photocon, the first LED light source is positioned at the first side of photocon, wherein, the light path of the first LED light source is provided with the first light collecting device, the exit end of the first light collecting device is provided with first and disperses device, first disperses device has near first plane of incidence of the first light collecting device and first exit facet relative with first plane of incidence, first plane of incidence has acclivitous the first inclined-plane and the second downward-sloping inclined-plane, photocon is arranged on outside the first exit facet, and photocon has reflective surface and the transparent surface relative with reflective surface, reflective surface is positioned at the lower end of photocon, transparent surface is positioned at the upper end of photocon, and reflective surface is provided with a plurality of acclivitous the first reflective planes.
By such scheme as seen, the light that the first LED light source sends forms the parallel light beam of multi beam and incides the first generating device after through the first light collecting device, collimated light beam is through the first light beam of dispersing that forming respectively behind the first inclined-plane of device and the second inclined-plane is inclined upwardly and propagating with downward-sloping propagation, the light beam propagated of being inclined upwardly forms total reflection and incides on reflective surface after inciding the transparent surface of photocon, pass through again reflective surface with vertical angle from the transparent surface outgoing, and the light beam of propagating downwards incides after reflective surface also with vertical angle from the transparent surface outgoing.
Like this, light beam incides and only passes through after optical conductor after primary event or a total reflection and primary event from the transparent surface outgoing, and the light energy decay is also not serious.And, the light of LED light source forms the multi beam collimated light beam after through the first light collecting device, the light energy of multi beam collimated light beam about equally, and can incide from first through the light beam of superrefraction and disperse on the reflective plane of device away from, the length of optical conductor can be done very longly, and form flat light source and luminous even, utilization ratio of optical energy is high.
In addition, because the LED light emitting module does not need to arrange two high-power LED light sources, production cost is low, and it is not obvious to generate heat.
A preferred scheme is be connected with joint face between two adjacent the first reflective planes, and joint face to be vertical with transparent surface.
This shows, joint face is vertical with transparent surface, and light beam can not incide on joint face, can guarantee that the light beam that incides optical conductor all can incide on a plane of reflection and from the transparent surface outgoing.
further scheme is, the LED light emitting module also comprises the second LED light source that is positioned at photocon the second side, the second LED light source light path is provided with the second light collecting device, the exit end of the second light collecting device is provided with second and disperses device, second disperses device has near second plane of incidence of the second light collecting device and second exit facet relative with second plane of incidence, second plane of incidence has acclivitous the 3rd inclined-plane and the 4th downward-sloping inclined-plane, the reflective surface of photocon also is provided with a plurality of the second downward-sloping reflective planes, each second reflective plane is arranged between two adjacent the first reflective planes.
As seen, both sides at photocon all arrange LED light source, the light that two LED light sources send incides photocon from both sides respectively, and two class reflective planes are set on the reflective surface of photocon, to from the light reflection of both sides incident to transparent surface, make the LED light emitting module have better illumination effect respectively.
Further scheme is, is coated with reflective membrane on reflective surface.Like this, can guarantee that the light that incides reflective surface is reflected on transparent surface fully, and can through the reflective surface outgoing, not improve the utilization rate of light energy.
Further scheme is, the transparent surface of photocon is plane or cambered surface.If transparent surface is arranged to the plane, form the hot spot of the less rectangle of area from the light of transparent surface outgoing, light luminance is higher.As transparent surface is arranged to cambered surface, the area of hot spot is larger, can increase the irradiated area of LED light emitting module.
Description of drawings
Fig. 1 is the structure chart of first embodiment of the invention.
Fig. 2 is the amplification decomposition figure of first embodiment of the invention partial structurtes.
Fig. 3 is the optical schematic diagram of first embodiment of the invention.
Fig. 4 is the structural representation of second embodiment of the invention.
Fig. 5 is the structural representation of third embodiment of the invention.
The invention will be further described below in conjunction with drawings and Examples.
The specific embodiment
LED light emitting module of the present invention has the LED spot light, and converts the LED spot light to area source, can be arranged on automobile as car light to use, and also can be applied in a plurality of fields such as street lamp or indoor illumination light fitting, decorative lamp etc.
The first embodiment:
Referring to Fig. 1 and Fig. 2, the LED light emitting module of the present embodiment has LED light source 10, and LED light source 10 comprises the LED chip that is encapsulated on substrate, and LED chip forms light by excitated fluorescent powder, and light is dispersed ejaculation to surrounding.
Be provided with the prefocus cup 11 as light collecting device on the light path of LED light source 10, prefocus cup 11 be 1/4th spherical, its inner surface is coated with reflectorized material, as high-reflecting film or metal film.Mounting mat 12 is housed below prefocus cup 11, and the middle part of mounting mat 12 is provided with through hole 13, and LED chip passes through hole 13.
Be provided with at the exit end of prefocus cup 11 and disperse device 15, it is made by transparent material, and light can incide to be dispersed in device 15 and reflects.Disperse device 15 and have the plane of incidence 16 and the exit facet 17 relative with the plane of incidence, as seen from Figure 2, the plane of incidence 16 is zigzag, and exit facet 17 is the plane, and vertical with horizontal direction.
Be provided with photocon 20 outside exit facet 17, photocon 20 is also to be made by transparent material, and light can be in the interior propagation of photocon 20.Preferably, photocon 20 with disperse device 15 and made by identical material.The reflective surface 21 that photocon 20 has transparent surface 24 and is oppositely arranged with transparent surface 24, reflective surface 21 is positioned at the lower end of photocon 20, and transparent surface 24 is positioned at the upper end of photocon 20, and in the present embodiment, transparent surface 24 is the plane.
Referring to Fig. 3, the multiple light beams L11 that LED light source 10 sends disperses to surrounding, these light beams L11 reflects after inciding the inner surface of prefocus cup 11, form the parallel light beam L12 of multi beam, these parallel light beam L12 incide with the direction perpendicular to the exit facet 17 of dispersing device 15 and disperse in device 15.
The plane of incidence 16 of dispersing device 15 is arranged on a side of close prefocus cup 11, and exit facet 17 is oppositely arranged with the plane of incidence 16.The plane of incidence 16 indentations, it has acclivitous the first inclined-plane 18 and the second downward-sloping inclined-plane 19, and the first inclined-plane 18 and the second inclined-plane 19 intervals settings.Preferably, the first inclined-plane 18 and the second inclined-plane 19 equal in length, and the first inclined-plane 18 equals the second inclined-plane 19 and horizontal angle with horizontal angle.
Parallel light beam L12 incides first inclined-plane 18 is rear and reflects, and the direction of propagation of light beam changes, and the deflecting light beams L17 of formation propagates downwards and incides on the reflective surface 21 of photocon 20.Parallel light beam L12 incides second inclined-plane 19 is rear and reflects, and the direction of propagation of light beam changes, and the deflecting light beams L13 of formation upwards propagates and incides on the transparent surface 24 of photocon 20.
As seen from Figure 3, the reflective surface 21 of photocon 20 comprises a plurality of reflective planes 22, forms the angle of certain angle between each reflective plane 22 and horizontal plane, and namely each reflective plane 22 all is obliquely installed.And from the direction of propagation of deflecting light beams L17, reflective plane 22 setting that all is inclined upwardly can be incided on reflective plane 22 to guarantee deflecting light beams L17.Preferably, the angle of inclination of each reflective plane 22 equates, and the length of each reflective plane 22 also equates.
Be provided with a joint face 23 between two adjacent reflective planes 22, joint face 23 setting vertical with transparent surface 24.Like this, deflecting light beams L17 can not incide on joint face 23, and guarantees that every a branch of deflecting light beams L17 all can incide on a reflective plane 22.
Because the deflecting light beams L13 incident angle that incides transparent surface 24 is larger, total reflection occurs on transparent surface 24 and form folded light beam L14, folded light beam L14 will incide on the reflective plane 22 of reflective surface 21, form folded light beam L15 through reflective plane 22, with the direction that is basically perpendicular to transparent surface 24 from transparent surface 24 outgoing.
After the deflecting light beams L17 that propagates downwards through the plane of incidence 16 incides photocon 20, will incide on reflective plane 22 and reflect, the folded light beam L18 of formation with perpendicular to the direction of transparent surface 24 through transparent surface 24 outgoing.
Can be reflected fully in order to ensure the light beam that incides reflective plane 22, can plate reflective membrane on reflective surface 21, as metallic film or high-reflecting film etc., reflective membrane also can only be plated on each reflective plane 22, do not plate reflective membrane on joint face 23, to reduce the production cost of LED light emitting module.
Certainly, reflective plane 22 also can utilize the principle of total reflection to realize the light beam that incides reflective plane 22 is reflected, this incident angle that need to incide the light beam on the plane of reflection 22 is larger, can realize by the angle of inclination that suitable reflective plane 22 is set.As utilize total reflection principle with beam reflection, need not to plate reflective membrane on reflective surface 21, further reduce the production cost of LED light emitting module, and whole photocon 20 all uses transparent light transmissive material to make, make the visual effect of LED light emitting module better, also be conducive to people and see through other device working conditions that photocon 20 observations are arranged on LED light emitting module rear portion.
The light that uses prefocus cup 11 that LED light source 10 is sent due to the LED light emitting module is transformed into multi beam collimated light beam L12 outgoing, collimated light beam L12 forms light beam L13, the L17 that multi beam is upwards propagated and propagated downwards after dispersing device 15, because total reflection will occur and reflex to distance to disperse device 15 place far away in the light beam L13 that upwards propagates on the transparent surface 24 of photocon 20, and all light beams finally all reflect through reflective surface 21 after from transparent surface 24 outgoing.Like this, all light beams are through primary event or through after a total reflection and primary event, and all from transparent surface 24 outgoing, the light energy decay is also not serious.And still have light beam incident on distance L ED light source 10 reflective plane 22 far away, can guarantee also to have the light beam outgoing at distance L ED light source 10 transparent surface 24 far away, thereby form the uniform area source of light distribution.
Disperse the angle of inclination on the first inclined-plane 18 of device 23 by adjusting, can change the angle of the light beam that incides transparent surface 24, thereby change the incidence angle of total reflection, and the propagation distance of change light beam, therefore can realize the increase and decrease of the length of photocon 20 by the angle of inclination that changes the first inclined-plane 18.
By regulating the angle of inclination on the second inclined-plane 19, can change the incident angle of the light beam that incides reflective plane 22, and by the angle of regulating each reflective plane 22 can guarantee all from the light beam of reflective plane 22 outgoing all to be basically perpendicular to the direction outgoing of transparent surface 24, avoid light beam from the two ends outgoing of photocon 20, to avoid the generation of dazzle.If being arranged on automobile, uses the LED light emitting module impact on sending a car in the time of can reducing meeting, guarantee driving safety as car light.
In the present embodiment, transparent surface 24 is the plane, during practical application, can be set to cambered surface, and cambered surface is back to 20 outsides protrusions in reflective surface 21 to photocon.Like this, the axial cross section of photocon 20 is not square, but top edge is the shape of evagination camber line.By transparent surface 24 is arranged to cambered surface, increase from the area of the hot spot that light beam forms of transparent surface 24 outgoing, but hot spot is still roughly orthogonal hot spot.
The second embodiment:
Referring to Fig. 4, the present embodiment has LED light source 30, as the convex lens 31 of light collecting device, disperse device 32 and photocon 40.LED light source 30 has substrate and is arranged on LED chip on substrate, and it is arranged on outside the first side of photocon 40.Convex lens 31 are arranged on LED light source 10 and disperse between device 32, and the light beam that is used for dispersing changes parallel light beam outgoing into.
The light beam L21 that LED light source 30 sends is through forming the light beam L22 of the parallel outgoing of multi beam after convex lens 31, collimated light beam L22 forms the deflecting light beams L23 that upwards propagates after inciding the plane of incidence of dispersing device 32, light beam L23 incides the rear generation total reflection of transparent surface 44 and forms light beam L24 and incide on the reflective plane 42 of reflective surface 41, and the folded light beam L25 of formation is to be basically perpendicular to the angle outgoing of transparent surface 44.
Collimated light beam L22 incides the plane of incidence rear section light beam L27 that disperses device 32 and propagates downwards and incide on reflective plane 42, and forms the light beam L28 outgoing that is basically perpendicular to transparent surface 44.
Like this, the light beam that LED light source 30 sends can be through forming area source after photocon 40, and from the homogenizer of photocon 40 outgoing, soft, satisfy the lamps for vehicle needs.
The 3rd embodiment:
Referring to Fig. 5, the present embodiment has two LED light sources 50,70, lay respectively at outside the both sides of photocon 60, be respectively equipped with the prefocus cup 51,71 as light collecting device on LED light source 50,70 light path, be respectively equipped with outside two sidewalls of photocon 60 and disperse device 52,72.In the present embodiment, LED light source 50, prefocus cup 51 and disperse LED light source 10, the prefocus cup 11 of the structure of device 52 and the first embodiment and disperse device 15 identical, and LED light source 70, prefocus cup 71 and disperse LED light source 10, the prefocus cup 11 of the structure of device 72 and the first embodiment and disperse device 15 also identical.And, LED light source 50, prefocus cup 51, disperse device 52 with LED light source 70, prefocus cup 71, disperse device 72 and arrange in the bilateral symmetry of photocon 60.
Photocon 60 has the transparent surface 64 that is located thereon end and the reflective surface 61 that is positioned at its lower end, reflective surface 61 comprises acclivitous the first reflective plane 62 and the second downward-sloping reflective plane 63, the first reflective plane 62 and the second reflective plane 63 intervals settings, and the first reflective plane 62 and the second reflective plane 63 is equal in length.
The light beam L31 that LED light source 50 sends incides through forming collimated light beam L32 after prefocus cup 51 plane of incidence of dispersing device 52, segment beam L32 incides acclivitous inclined-plane 54 and propagates downwards, forms deflecting light beams L37 and incides the first rear formation light beam of reflective plane 62 L38 to be basically perpendicular to the angle outgoing of transparent surface 64.The light beam L32 of partial parallel incides the backward upper propagation in downward-sloping inclined-plane 53, deflecting light beams L33 incides the rear generation total reflection of transparent surface 64, forms light beam L34 and incides the first rear formation folded light beam of reflective plane 62 L35 to be basically perpendicular to the angle outgoing of transparent surface 64.
In like manner, the light beam L41 that LED light source 70 sends is through forming collimated light beam L42 after prefocus cup 71, and incide the plane of incidence of emanator part 72, segment beam L42 incides acclivitous inclined-plane 73 and forms the deflecting light beams L47 that propagates downwards, and deflecting light beams L47 incides the second rear formation folded light beam of the plane of reflection 63 L48 to be basically perpendicular to the angle outgoing of transparent surface 64.Partial parallel light beam L42 incides downward-sloping inclined-plane 74 and reflects, form the deflecting light beams L43 that upwards propagates, deflecting light beams L43 incides the rear generation total reflection of transparent surface 64 and forms folded light beam L44, folded light beam L44 incides the second rear formation light beam of reflective plane 63 L45, to be basically perpendicular to the angle outgoing of transparent surface 64.
Can be reflected fully in order to ensure the light beam that incides the first reflective surface 62, the second reflective surface 63, can plate reflective membrane on reflective surface 61, perhaps utilize total reflection principle with beam reflection, as utilize total reflection principle with beam reflection, need to arrange the angle of inclination of the first reflective surface 62, the second reflective surface 63 larger.
By the both sides at photocon 60, LED light source 50,70 is set respectively, can guarantees that the both sides of photocon 60 have light beam incident, guarantee that the surface source luminescence that forms is even.
Certainly, above-described embodiment is only the preferred embodiment of the invention, also more change can be arranged during practical application, for example, the inwall of prefocus cup is arranged to other cambered surfaces; Perhaps, in the 3rd embodiment, use convex lens to substitute one of them prefocus cup as light collecting device, such change can't affect enforcement of the present invention.
It is emphasized that at last to the invention is not restricted to above-mentioned embodiment, also should be included in the protection domain of claim of the present invention as the change of light collecting device, the variations such as change of transparent surface shape.
Claims (10)
1.LED light emitting module comprises
The first LED light source and photocon, described the first LED light source is positioned at the first side of described photocon;
It is characterized in that:
The light path of described the first LED light source is provided with the first light collecting device, the exit end of described the first light collecting device is provided with first and disperses device, described first disperses device has near first plane of incidence of described the first light collecting device and first exit facet relative with described first plane of incidence, and described first plane of incidence has acclivitous the first inclined-plane and the second downward-sloping inclined-plane;
Described photocon is arranged on outside described the first exit facet, described photocon has reflective surface and the transparent surface relative with described reflective surface, described reflective surface is positioned at the lower end of described photocon, described transparent surface is positioned at the upper end of described photocon, and described reflective surface is provided with a plurality of acclivitous the first reflective planes.
2. LED light emitting module according to claim 1 is characterized in that:
Be connected with joint face between two adjacent described the first reflective planes, described joint face is vertical with described transparent surface.
3. LED light emitting module according to claim 1 is characterized in that:
Also comprise the second LED light source that is positioned at described photocon the second side, described the second LED light source light path is provided with the second light collecting device, the exit end of described the second light collecting device is provided with second and disperses device, described second disperses device has near second plane of incidence of described the second light collecting device and second exit facet relative with described second plane of incidence, and described second plane of incidence has acclivitous the 3rd inclined-plane and the 4th downward-sloping inclined-plane;
The reflective surface of described photocon also is provided with a plurality of the second downward-sloping reflective planes, and each described second reflective plane is arranged between two adjacent described the first reflective planes.
4. LED light emitting module according to claim 3 is characterized in that:
The length of described the first reflective plane and described the second reflective plane equal in length.
5. the described LED light emitting module of according to claim 1 to 4 any one is characterized in that:
Be coated with reflective membrane on described reflective surface.
6. LED light emitting module according to claim 5 is characterized in that:
Described reflective membrane is metallic film.
7. according to claim 3 or 4 described LED light emitting modules is characterized in that:
Described the first light collecting device and/or described the second light collecting device are prefocus cup.
8. according to claim 3 or 4 described LED light emitting modules is characterized in that:
Described the first light collecting device and/or described the second light collecting device are convex lens.
9. the described LED light emitting module of according to claim 1 to 4 any one is characterized in that:
Described transparent surface is the plane.
10. the described LED light emitting module of according to claim 1 to 4 any one is characterized in that:
Described transparent surface is cambered surface.
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| CN2013100497931A CN103148382A (en) | 2013-02-07 | 2013-02-07 | LED (light emitting diode) luminous module |
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| CN2013100497931A CN103148382A (en) | 2013-02-07 | 2013-02-07 | LED (light emitting diode) luminous module |
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| CN109285369A (en) * | 2018-09-14 | 2019-01-29 | 吉林小糸东光车灯有限公司 | A kind of timing light guide array signal lamp |
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| CN110785605A (en) * | 2017-06-16 | 2020-02-11 | 理想工业照明有限责任公司 | Optical assembly and appliance comprising same |
| CN107388159A (en) * | 2017-08-29 | 2017-11-24 | 上海小糸车灯有限公司 | A kind of extendable car light light guide luminescent system of width |
| CN109285369A (en) * | 2018-09-14 | 2019-01-29 | 吉林小糸东光车灯有限公司 | A kind of timing light guide array signal lamp |
| WO2020135291A1 (en) * | 2018-12-26 | 2020-07-02 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device |
| CN111365676A (en) * | 2018-12-26 | 2020-07-03 | 深圳市绎立锐光科技开发有限公司 | Light emitting device |
| CN117146227A (en) * | 2023-08-09 | 2023-12-01 | 珠海水立方照明科技有限公司 | LED optical system |
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Application publication date: 20130612 |