CN102788309A - Lampshade and light-emitting diode (LED) luminaire applying same - Google Patents
Lampshade and light-emitting diode (LED) luminaire applying same Download PDFInfo
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- CN102788309A CN102788309A CN2012102839464A CN201210283946A CN102788309A CN 102788309 A CN102788309 A CN 102788309A CN 2012102839464 A CN2012102839464 A CN 2012102839464A CN 201210283946 A CN201210283946 A CN 201210283946A CN 102788309 A CN102788309 A CN 102788309A
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Abstract
The invention relates to a lampshade, which comprises a lampshade body provided with an incident plane and an emergent plane, wherein the incident plane is one plane of the lampshade body, which is used for enveloping a light source; the incident plane and the emergent plane are respectively arranged at the inner side and the outer side of the lampshade body; the incident plane is provided with a plurality of bulges formed by rotating around the central axis of the lampshade body; each bulge is formed by combining a working plane and a non-working plane; the normal of the incident light, which is on the working plane, is a first normal; the normal of refracted light, which is on the emergent plane, is a second normal; an included angle between the first normal and the second normal is greater than 0 degree. Compared with the prior art, by the manner of regulating the concentration of a scattering diluent, light is distributed through a drift angle between the incident plane and the emergent plane, thus, the luminous efficiency of the lampshade is high, and the luminaire equipped with the lampshade is high in luminous efficiency.
Description
Technical field
The present invention relates to a kind of LED lamp distribution and use lampshade, relate in particular to the luminous intensity distribution lampshade of a kind of LED light fixture with high light-emitting efficiency.
Background technology
Flourish along with LED illumination; How the improvement through lampshade structure makes the LED light fixture that the more light transmission of high-quality arranged; Be one of present LED light fixture main flow R&D direction, existing LED illumination is processed with light-scattering material with sheathing material usually, adopts the mode of in the LED lampshade, adding scattering diluent; Make it to let that light passes through, scattered light effectively again, line source is changed into area source.The transmission characteristic index that can characterize light commonly used has light transmittance, mist degree, refractive index etc., wherein, and the important performance indexes that two indexs of light transmittance and mist degree are light transmissions of exosyndrome material.Light transmittance is to see through the luminous flux of lampshade and the percentage of its incident flux; Be most important performance indications that characterize the resin transparent degree; A kind of light transmittance of resin is high more; Its transparency is just good more, and mist degree is the material scattering luminous flux and the percentage of the ratio of material luminous flux, is commonly used to characterize the quality of the effect of " seeing that light loses the lamp pearl " in the LED light fixture.
The used lampshade of existing LED light fixture is as depicted in figs. 1 and 2; After adding scattering diluent in the inside of lampshade; The light that sends of led light source gets into lampshade through the lampshade plane of incidence in the LED light fixture, in the inside of lampshade through the scattering of scattering diluent (or claim " scattering particles "), again through the outgoing of lampshade exit facet; The directive lighting space, thus realize luminous intensity distribution.Yet; The weak point of regulating the light transmission of lampshade through the mode of adding scattering diluent is: two performance indications of light transmittance and mist degree are conflicting, and light is the scattering of process scattering diluent in the inside of lampshade, and most of light can pass through exit facet directive lighting space after the scattering; And total reflection takes place in another part scattered beam in lampshade; Come back reflective to shake but retroeflection to lamp interior, cause the waste of luminous energy, and influence the light transmittance of lampshade.
Summary of the invention
The technical problem that the present invention solves is to overcome the above-mentioned deficiency of prior art, provide a kind of in scattering, lampshade that light extraction efficiency is high.
For solving the problems of the technologies described above; The invention provides following technical scheme: a kind of lampshade; Comprise the lampshade body that is provided with the plane of incidence and exit facet; The said plane of incidence is the one side of lampshade body envelope light source; The said plane of incidence and exit facet are located at the inside and outside both sides of lampshade body respectively, and the said plane of incidence is provided with several around the convexity that the central shaft revolution of lampshade body forms, and said convexity is combined by working face and non-working surface; Get into by working face that the lampshade body forms refracted ray and form the emergent ray that exports to the lampshade body at exit facet from the incident ray of light source; The normal of said incident ray at the working face place is first normal, and said refracted ray is second normal at the normal of exit facet, and the angle between said first normal and second normal is greater than 0 °; Angle between said first normal and second normal refers to the minimum angles value that first normal overlaps around the rotation of the intersection point of first normal and second normal, until first normal and second normal, and the angle that is rotated in a clockwise direction＞0 °, along angle＜0 that counterclockwise rotates °.Adopt said structure; Be different from the mode of passing through adjustment scattering diluent concentration in the prior art, light carries out luminous intensity distribution through the drift angle between the plane of incidence and the exit facet, in lampshade, need not to add or only add the very small amount of scattered agent; Can increase the angle of emergence of emergent ray; It does not have back scattering and total reflection or has only a spot of back scattering and total reflection in lampshade inside, the light extraction efficiency of such lampshade is high, and its light extraction efficiency of light fixture that is equipped with such lampshade is high.
Preferably, the angle between the said refracted ray and second normal is less than the angle of total reflection of said lampshade body.Adopt such structure, avoid light in the lampshade body, to come the back reflective concussion, light efficiency efficient thereby improved.
Preferably, said working face is formed by the central shaft revolution of first bus around the lampshade body, and said non-working surface is formed by the central shaft revolution of second bus around the lampshade body, and the angle between said first bus and second bus is 75 °～90 °.Need to prove that the angle between first bus and second bus is meant here: first bus and second bus intersection point the place and the angle between tangent two straight lines of bus separately.Angle between first bus of second bus of each non-working surface and the working face that is adjacent is arranged to after 75 °～90 °; Can make incident ray pass through the plane of incidence fully reflects; Improve the emergent ray uniformity, and enlarge the light angle of light source at lighting space.
Preferably, said first bus is vertical each other with second bus.Adopt such structure, can make incident ray pass through the plane of incidence and fully reflect, improve the emergent ray uniformity, and enlarge the light angle of light source at lighting space.
Preferably, said first normal and second bus are parallel to each other.Adopt such structure, can make incident ray pass through the plane of incidence and fully reflect, improve the emergent ray uniformity, and enlarge the light angle of light source at lighting space.
Preferably, said first bus is curve or straight line.Adopt such structure, can make incident ray pass through the plane of incidence and fully reflect, improve the emergent ray uniformity, and enlarge the light angle of light source at lighting space.
Preferably, said second bus is a straight line.Adopt such structure, can make incident ray pass through the plane of incidence and fully reflect, improve the emergent ray uniformity, and enlarge the light angle of light source at lighting space.
Preferably, said convexity forms stepped curved surface along the axially-aligned of lampshade body.Adopt such structure; Not only can make incident ray pass through the plane of incidence fully reflects; Enlarge the light angle of light source, and with after the whole stepped curved surface of the plane of incidence at lighting space, axially go up each differing heights place protruding pairing, first normal is different with the angle between second normal; Therefore; The emergent ray drift angle that is positioned at the axial centre zone of stepped curved surface differs bigger with the emergent ray drift angle that is positioned at stepped curved surface axial edge zone, can carry out luminous intensity distribution according to the light intensity demand of different visual angles, and the light that light source is sent more rationally distributes in lighting space.
Preferably, said exit facet is made up of a plurality of discrete scales.Adopt such structure, the scattering degree that the light of outgoing increases to the edge from the center is reached unanimity, improved the emergent ray uniformity to a certain extent.
Preferably, said exit facet is a hair side.Adopt such structure, can make light in the lighting space more even distribution.
Preferably, said exit facet is a continuous mirror surface.Adopt such structure, can make the light transmittance of light higher.Need to prove that the continuous mirror surface here is meant one whole section minute surface that curvature is continuous.
A kind of LED light fixture of using above-mentioned lampshade comprises being arranged at the inner led light source of radiator that said led light source is connected with driving power, and said radiator bottom is provided with joint.The LED light fixture that is equipped with above-mentioned lampshade has the high beneficial effect of light extraction efficiency.
Compared with prior art; The invention has the beneficial effects as follows: be different from the prior art through adjusting the mode of scattering diluent concentration; Light carries out luminous intensity distribution through the drift angle between the plane of incidence and the exit facet, in lampshade, need not to add or only add the very small amount of scattered agent, can increase the angle of emergence of emergent ray; It does not have back scattering and total reflection or has only a spot of back scattering and total reflection in lampshade inside, the light extraction efficiency of such lampshade is high.
Description of drawings
Fig. 1 is the structural representation of existing LED light fixture;
Fig. 2 is the structural representation of the used lampshade of existing LED light fixture;
Fig. 3 is the structural representation of lampshade of the present invention;
Fig. 4 is the structural representation of a kind of embodiment of lampshade of the present invention;
Fig. 5 is the local enlarged diagram of lampshade of the present invention.
The Reference numeral of Fig. 1 and Fig. 2 is following: plane of light incidence-101; Beam projecting face-102; Scattering diluent-103; Lampshade-210; Radiator-220; Joint-230; Driving power-240; Light source-250.
The Reference numeral of Fig. 3 to Fig. 5 is following: lampshade body-3; The plane of incidence-301; Exit facet-302; Protruding-4; Working face-401; Non-working surface-402; First normal-501; Second normal-502; Angle-503 between first normal and second normal; Angle-504 between the refracted ray and second normal; Incident ray-505; Refracted ray-506; Emergent ray-507; Scale-601.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is further described.
Embodiment of the present invention is not limited to following examples, and the various variations of under the prerequisite that does not break away from aim of the present invention, making all belong within protection scope of the present invention.
Embodiment 1
Like Fig. 3 and shown in Figure 5; The present embodiment lampshade comprises the lampshade body 3 that is provided with the plane of incidence 301 and exit facet 302; Exit facet 302 is continuous curvature, and the plane of incidence 301 is the one side of lampshade body 3 envelope light sources, and the plane of incidence 301 and exit facet 302 are located at the inside and outside both sides of lampshade body 3 respectively; The plane of incidence 301 is provided with several convexities 4 that forms around the central shaft revolution of lampshade body 3; At the lampshade body 3 inboard bulge loops that form sealing, several protruding 4 axially-aligned along lampshade body 3 form stepped curved surface, and convexity 4 is combined by working face 401 and non-working surface 402; Working face 401 is formed by the central shaft revolution of first bus around lampshade body 3, and non-working surface 402 is formed by the central shaft revolution of second bus around lampshade body 3.In the present embodiment; Part first bus is that straight line portion first bus is a curve; Second bus is a straight line; First bus and second bus are after the central shaft revolution of lampshade body 3; Form angle by 75 ° to 90 ° working faces that do not wait and non-working surface, the angle here be meant face that first bus is rotarily formed, and the face that is rotarily formed of second bus the intersection and the angle between tangent two straight lines of bus separately, some groups of working faces 401 and non-working surface 402 together constitute several boss.Get into by working face 401 that lampshade bodies 3 form refracted ray 506 and form the emergent ray 507 that exports to lampshade body 3 at exit facet 302 from the incident ray 505 of light source; The normal of incident ray 505 at working face 401 places is first normal 501; Refracted ray 506 is second normal 502 at the normal of exit facet 302; Angle 503 between first normal and second normal refers to the minimum angles value that first normal 501 overlaps around the intersection point rotation of first normal 501 and second normal 502, until first normal 501 and second normal 502, and angle＞0 that is rotated in a clockwise direction of definition °, along angle＜0 that counter clockwise direction is rotated °.In the present embodiment, lampshade body 3 is processed by the PC material, and its refractive index is 1.58, and the angle of total reflection is 39.3 °, and himself light transmittance is 90%.
The model of producing to Sharp is the GW5BMC27KG4 light source design, and assurance light is implemented in light intensity in 180 ° in lighting space inhomogeneities is less than 5%, and the full-shape that light intensity drops to a half of central light strength is 230 ° to 235 °.According to the distribution needs of lighting space light at being provided with everywhere of lampshade different first normal 501 and second normal, 502 angles 503; Guarantee that simultaneously refract light 506 is in the angle of total reflection of exit facet incidence angle everywhere less than PC material itself; Make light satisfy the light transmittance that light distribution requirements has guaranteed bright dipping simultaneously, improved the transmission characteristic of light in the lampshade body 3; As; Angle 503 between the somewhere of lampshade first normal 501 and second normal 502 is 20.4 °; Here; Incident light 505 the incidence angle of 401 working faces be 1.57 ° through the refract lights 506 of 401 working faces refraction back formation the incidence angle of exit facet be 19.4 ° less than the angle of total reflection; 506 form the refract light 507 that leaves lampshade through exit facet 302 refractions again, after twice refraction through working face 401 and exit facet 302, have realized 12.8 ° drift angle between incident ray 505 and the emergent ray 507.Because at refract light 506 in the incidence angle of exit facet less than the angle of total reflection; Light does not have total reflection in lampshade body 3; Make light guarantee the light transmittance of bright dipping simultaneously in the requirement of satisfying luminous intensity distribution, improved the transmission characteristic of light in the lampshade body 3, the light transmittance of actual measurement PC cover is 90%; Light intensity inhomogeneities in 180 ° is less than 4%, and the full-shape that light intensity drops to a half of central light strength is 232 °.
Embodiment 2
In order further to improve uniformity; In lampshade body 3, adding mass ratio on the basis of embodiment 1 is that 0.2% silicones ball is as scattering diluent; The light transmittance of actual measurement lampshade body 3 is 89%; Light intensity inhomogeneities in 180 ° is less than 2%, and the full-shape that light intensity drops to a half of central light strength is 234 °.
All the other structures see also embodiment 1.
Embodiment 3
In order further to improve uniformity; On the basis of embodiment 1, being arranged to depth-to-width ratio at lampshade exit surface 302 is that 0.3 characteristic size is the hair side of 0.1mm; The light transmittance of actual measurement lampshade body 3 is 89.5%; Light intensity inhomogeneities in 180 ° is less than 3%, and the full-shape that light intensity drops to a half of central light strength is 233 °.
All the other structures see also embodiment 1.
Embodiment 4
As shown in Figure 4; Be different from the exit facet 302 of the continuous curvature among the embodiment 1, the exit facet 302 in the present embodiment is made up of a plurality of discrete scales 601, and each scale 601 is the quadrangle shape; And scale 601 surfaces are hair side; Improved emergent ray 507 uniformities, in all the other embodiments, the also continuous face of exit facet 302.
All the other structures see also embodiment 1.
Embodiment 5
Present embodiment LED light fixture comprises the led light source that is arranged at radiator inside; Said led light source is connected with driving power; Said radiator bottom is provided with joint; And above led light source, be provided with the lampshade of envelope led light source, and the concrete structure of lampshade sees also embodiment 1, and the LED light fixture that is equipped with above-mentioned lampshade has the high beneficial effect of light extraction efficiency.
Combine accompanying drawing that embodiments of the invention are described in detail above; But the present invention is not limited to the foregoing description; In the ken that those of ordinary skills possessed, can also make various variations, these variations all belong within protection scope of the present invention.
Claims (9)
1. lampshade; Comprise the lampshade body (3) that is provided with the plane of incidence (301) and exit facet (302); The said plane of incidence (301) is the one side of lampshade body (3) envelope light source; The said plane of incidence (301) and exit facet (302) are located at the inside and outside both sides of lampshade body (3) respectively; It is characterized in that: the said plane of incidence (301) is provided with several convexities (4) that forms around the central shaft revolution of lampshade body (3); Said convexity (4) is combined by working face (401) and non-working surface (402); Get into by working face (401) that lampshade body (3) forms refracted ray (506) and form the emergent ray (507) that exports to lampshade body (3) at exit facet (302) from the incident ray (505) of light source; The normal that said incident ray (505) is located at working face (401) is first normal (501); Said refracted ray (506) is second normal (502) at the normal of exit facet (302); Angle (503) between said first normal and second normal is greater than 0 °, and the angle (503) between said first normal and second normal refers to the minimum angles value that first normal (501) overlaps around the intersection point rotation of first normal (501) and second normal (502), until first normal (501) and second normal (502), and the angle that is rotated in a clockwise direction＞0 °, along angle＜0 of rotation counterclockwise °.
2. lampshade according to claim 1 is characterized in that: the angle (504) between the said refracted ray (506) and second normal is less than the angle of total reflection of said lampshade body (3).
3. lampshade according to claim 1; It is characterized in that: said working face (401) is formed by the central shaft revolution of first bus around lampshade body (3); Said non-working surface (402) is formed by the central shaft revolution of second bus around lampshade body (3), and the angle between said first bus and second bus is 75 °～90 °.
4. lampshade according to claim 3 is characterized in that: the normal of the normal of said first bus and second bus is vertical each other.
5. according to arbitrary described lampshade in the claim 1 to 4, it is characterized in that: said convexity (4) forms stepped curved surface along the axially-aligned of lampshade body (3).
6. lampshade according to claim 5 is characterized in that: said exit facet (302) is made up of a plurality of discrete scales (601).
7. lampshade according to claim 5 is characterized in that: said exit facet (302) is a hair side.
8. lampshade according to claim 5 is characterized in that: said exit facet (302) is a continuous mirror surface.
9. the LED light fixture of application such as the said lampshade of claim 1 to 8, it is characterized in that: comprise being arranged at the inner led light source of radiator, said led light source is connected with driving power, and said radiator bottom is provided with joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283946.4A CN102788309B (en) | 2012-08-10 | 2012-08-10 | Lampshade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210283946.4A CN102788309B (en) | 2012-08-10 | 2012-08-10 | Lampshade |
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| Publication Number | Publication Date |
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| CN102788309A true CN102788309A (en) | 2012-11-21 |
| CN102788309B CN102788309B (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210283946.4A Active CN102788309B (en) | 2012-08-10 | 2012-08-10 | Lampshade |
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| CN (1) | CN102788309B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559770A (en) * | 2017-10-15 | 2018-01-09 | 湖南太阳龙医疗科技有限公司 | A kind of total reflection focus method and device for LED shadowless lamps |
| CN110799421A (en) * | 2018-12-04 | 2020-02-14 | 深圳市大疆创新科技有限公司 | Lampshade structure, unmanned aerial vehicle horn, unmanned aerial vehicle and movable platform |
| CN109844405B (en) * | 2016-10-11 | 2020-11-17 | 昕诺飞控股有限公司 | Lighting device for a light source |
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| CN2934909Y (en) * | 2006-07-18 | 2007-08-15 | 朱润发 | Decorative lamp |
| CN201652163U (en) * | 2010-04-19 | 2010-11-24 | 中山市宝盈电器有限公司 | Lampshade for bulb-shaped LED lamp |
| CN202002013U (en) * | 2010-12-30 | 2011-10-05 | 柏芮登照明股份有限公司 | Combined type lamp shade structure |
| US20120155072A1 (en) * | 2010-12-20 | 2012-06-21 | Hon Hai Precision Industry Co., Ltd. | Led tube lamp |
| CN202791792U (en) * | 2012-08-10 | 2013-03-13 | 霍永峰 | Lampshade and light-emitting diode (LED) lamp utilizing the same |
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2012
- 2012-08-10 CN CN201210283946.4A patent/CN102788309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2934909Y (en) * | 2006-07-18 | 2007-08-15 | 朱润发 | Decorative lamp |
| CN201652163U (en) * | 2010-04-19 | 2010-11-24 | 中山市宝盈电器有限公司 | Lampshade for bulb-shaped LED lamp |
| US20120155072A1 (en) * | 2010-12-20 | 2012-06-21 | Hon Hai Precision Industry Co., Ltd. | Led tube lamp |
| CN202002013U (en) * | 2010-12-30 | 2011-10-05 | 柏芮登照明股份有限公司 | Combined type lamp shade structure |
| CN202791792U (en) * | 2012-08-10 | 2013-03-13 | 霍永峰 | Lampshade and light-emitting diode (LED) lamp utilizing the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109844405B (en) * | 2016-10-11 | 2020-11-17 | 昕诺飞控股有限公司 | Lighting device for a light source |
| CN107559770A (en) * | 2017-10-15 | 2018-01-09 | 湖南太阳龙医疗科技有限公司 | A kind of total reflection focus method and device for LED shadowless lamps |
| CN110799421A (en) * | 2018-12-04 | 2020-02-14 | 深圳市大疆创新科技有限公司 | Lampshade structure, unmanned aerial vehicle horn, unmanned aerial vehicle and movable platform |
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| Publication number | Publication date |
|---|---|
| CN102788309B (en) | 2014-01-29 |
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