CN202791791U - Light-emitting diode (LED) light distribution lamp cover and light-emitting diode (LED) lamp - Google Patents
Light-emitting diode (LED) light distribution lamp cover and light-emitting diode (LED) lamp Download PDFInfo
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- CN202791791U CN202791791U CN2012203954978U CN201220395497U CN202791791U CN 202791791 U CN202791791 U CN 202791791U CN 2012203954978 U CN2012203954978 U CN 2012203954978U CN 201220395497 U CN201220395497 U CN 201220395497U CN 202791791 U CN202791791 U CN 202791791U
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Abstract
The utility model relates to a light-emitting diode (LED) light distribution lamp cover and a light-emitting diode (LED) lamp. The LED light distribution lamp cover comprises a lamp body, and the lamp body is provided with an incident plane and an exit surface. The incident plane is one side of the lamp cover body envelops one side of light source. The incident plane and the exit surface are respectively arranged on an inner side of the lamp cover body and an outer side of the lamp cover body. The exit surface is a continuous curved surface. The incident plane is provided with a plurality of protrusions, wherein the plurality of protrusions are formed by rotating around a center shaft of the lamp cover body. By the adoption of the structure, differing from the prior art, the LED light distribution lamp cover and the LED lamp overcomes the defect that by adjusting the concentration of the scattering diluent, the prior art achieves light distribution through a deflection angle between the raised incident plane and the exit surface which is smooth and has continuous curvature. Compared with the prior art, the LED light distribution lamp cover and the LED lamp has the advantage that an angle of emergence can be enlarged without the need for adding or only adding a small amount of scattering agent. Further, due to the fact that the inner portion of the lamp cove of the LED light distribution lamp cover and the LED lamp has no backscatter and total reflection or has a small amount of backscatter and total reflection, and luminous efficiency of the lamp is high.
Description
Technical field
The utility model relates to a kind of luminous intensity distribution lampshade, particularly a kind of LED luminous intensity distribution lampshade.
Background technology
Flourish along with LED illumination, how the improvement by lampshade structure is so that the LED light fixture has the more light transmission of high-quality, it is one of present LED light fixture main flow R﹠D direction, existing LED illumination is made with light-scattering material usually with sheathing material, the mode of scattering diluent is added in employing in the LED lampshade, make it to allow 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, most important performance indications that characterize the resin transparent degree, a kind of light transmittance of resin is higher, its transparency is just better, 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 as depicted in figs. 1 and 2, after adding scattering diluent in the inside of lampshade, the light that sends of led light source enters lampshade by 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, come the weak point of the light transmission of regulating lampshade to be by the mode of adding scattering diluent: two performance indications of light transmittance and mist degree are conflicting, light is in the process scattering diluent scattering of the inside of lampshade, most of light can pass through exit facet directive lighting space after the scattering, and total reflection occurs in another part scattered beam in lampshade, come back reflective to shake but retroeflection to lamp interior, cause the waste of luminous energy, and affect the light transmittance of lampshade.
The utility model content
The technical problems to be solved in the utility model is to overcome the above-mentioned deficiency of prior art, provide a kind of in scattering, LED luminous intensity distribution lampshade that light extraction efficiency is high.
For solving the problems of the technologies described above, the utility model provides following technical scheme:
A kind of LED luminous intensity distribution lampshade, comprise the lampshade body that is provided with the plane of incidence and exit facet, the described plane of incidence is the one side of lampshade body envelope light source, the described plane of incidence and exit facet are divided into the inside and outside both sides of lampshade body, described exit facet is continuous curve surface, and the described plane of incidence is provided with several projections that forms around the central shaft revolution of lampshade body.Adopt said structure, be different from the prior art by adjusting the mode of scattering diluent concentration, light by projection the plane of incidence and the drift angle between level and smooth, that curvature the is continuous exit facet carry out luminous intensity distribution, in lampshade, need not to add or only add a small amount of scattering diluent, can increase the angle of emergence of emergent ray, it does not have back scattering and total reflection or only has a small amount of back scattering and total reflection in lampshade inside, the light extraction efficiency of such lampshade is high.
Preferably, described projection is combined by working face and non-working surface, enter the lampshade body from the incident ray of light source by working face and form refracted ray, and form the emergent ray export to the lampshade body at exit facet, the normal of described incident ray at the working face place is the first normal, described refracted ray is the second normal at the normal of exit facet, angle between described the first normal and the second normal is greater than 0 °, angle between described the first normal and the second normal refers to that the first method wire-wound the intersection point rotation of the first normal and the second normal, until the minimum angles value that the first normal and the second normal overlap, and the angle that is rotated in a clockwise direction of definition＞0 °, the angle of rotating in the counterclockwise direction＜0 °.Adopt such structure, incident ray carries out unirefringence, scattering when being entered by working face, further the scattering angle of increasing light.
Preferably, the angle between described refracted ray and the second normal is less than the angle of total reflection of described lampshade body.Adopt such structure, avoid light in the lampshade body, to come the back reflective concussion, light efficiency efficient thereby improved.
Preferably, described working face is formed by the central shaft revolution of the first bus around the lampshade body, described non-working surface is formed by the central shaft revolution of the second bus around the lampshade body, angle between described the first bus and the second bus is 75 °～90 °, need to prove that the angle between the first bus and the second bus refers to herein: the first bus and the second bus intersection point the place and the angle between tangent two straight lines of bus separately.Angle between the first bus of the second bus of each non-working surface and the working face that is adjacent is 75 °～90 °, and the angle between the first bus and the second bus refers to herein: the first bus and the second bus intersection point the place and the angle between tangent two straight lines of bus separately.Can make incident ray pass through the plane of incidence and fully reflect, improve the emergent ray uniformity, and enlarge light source in the light angle of lighting space.
Preferably, described exit facet is hair side.Adopt such structure, it is more even that light is distributed at lighting space, and improve mist degree.
A kind of LED light fixture of using above-mentioned LED luminous intensity distribution lampshade comprises the led light source that is arranged at radiator inside, and described led light source is connected with driving power, and described radiator bottom is provided with joint, and described LED luminous intensity distribution lampshade is arranged at the led light source periphery.
Compared with prior art, the beneficial effects of the utility model are: be different from the prior art by adjusting the mode of scattering diluent concentration, light by projection the plane of incidence and the drift angle between the level and smooth exit facet carry out luminous intensity distribution, in lampshade, need not to add or only add a small amount of scattering diluent, can increase the angle of emergence of emergent ray, it does not have back scattering and total reflection or only has a small amount 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 the utility model LED luminous intensity distribution lampshade;
Fig. 4 is the local enlarged diagram of the utility model LED luminous intensity distribution lampshade.
The Reference numeral of Fig. 1 and Fig. 2 is as follows: 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. 4 is as follows: lampshade body-3; The plane of incidence-301; Exit facet-302; Projection-4; Working face-401; Non-working surface-402; The first normal-501; The second normal-502; Angle-503 between the first normal and the second normal; Angle-504 between refracted ray and the second normal; Incident ray-505; Refracted ray-506; Emergent ray-507.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Embodiment of the present utility model is not limited to following examples, all belongs within the protection domain of the present utility model in the various variations of making under the prerequisite that does not break away from the utility model aim.
Embodiment 1
As shown in Figure 3 and Figure 4, 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, the plane of incidence 301 is the one side of lampshade body 3 envelope light sources, the plane of incidence 301 and exit facet 302 are located at respectively the inside and outside both sides of lampshade body 3, the plane of incidence 301 is provided with several projections 4 that forms around the central shaft revolution of lampshade body 3, at the lampshade body 3 inboard bulge loops that form sealing, several projections 4 form stepped curved surface along the axially-aligned of lampshade body 3, projection 4 is combined by working face 401 and non-working surface 402, working face 401 is formed by the central shaft revolution of the first bus around lampshade body 3, and non-working surface 402 is formed by the central shaft revolution of the second bus around lampshade body 3.
In the present embodiment, part the first bus is that straight line portion the first bus is curve, the second bus is straight line, the first bus and the second bus are after the central shaft revolution of lampshade body 3, form angle by 75 ° to the 90 ° working faces that do not wait and non-working surface, angle herein refer to face that the first bus is rotarily formed, and the face that is rotarily formed of the 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 consist of several boss.
Enter lampshade body 3 from the incident ray 505 of light source by working face 401 and form refracted ray 506, and form the emergent ray 507 that exports to lampshade body 3 at exit facet 302, the normal of incident ray 505 at working face 401 places is the first normal 501, refracted ray 506 is the second normal 502 at the normal of exit facet 302, angle 503 fingers the first normal 501 between the first normal and the second normal is around the intersection point rotation of the first normal 501 and the second normal 502, until the minimum angles value that the first normal 501 and the second normal 502 overlap, and the angle that is rotated in a clockwise direction of definition＞0 °, the angle of rotating in the counterclockwise direction＜0 °.
In the present embodiment, lampshade body 3 is made 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 for 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 arranging everywhere of lampshade different the first normal 501 and the 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 light distribution requirements and guaranteed simultaneously the light transmittance of bright dipping, improved the transmission characteristic of lampshade body 3 interior light; As, angle 503 between the somewhere of lampshade the first normal 501 and the second normal 502 is 20.4 °, herein, incident light 505 the incidence angle of 401 working faces be 1.57 ° of refract lights 506 that after the refraction of 401 working faces, form 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, 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 simultaneously the light transmittance of bright dipping in the requirement of satisfying luminous intensity distribution, improved the transmission characteristic of lampshade body 3 interior light, the light transmittance of actual measurement lampshade body 3 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, on the basis of embodiment 1, be that 0.2% silicones ball is as scattering diluent at lampshade body 3 interior interpolation mass ratioes, 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, being arranged to depth-to-width ratio at lampshade exit surface 302 on the basis of embodiment 1 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
Present embodiment LED light fixture comprises the led light source that is arranged at radiator inside, described led light source is connected with driving power, described radiator bottom is provided with joint, and above led light source, be provided with the LED luminous intensity distribution lampshade of envelope led light source, LED luminous intensity distribution lampshade is arranged at the led light source periphery, 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.
The utility model is not limited to the aforesaid specific embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (6)
1. LED luminous intensity distribution lampshade, comprise the lampshade body (3) that is provided with the plane of incidence (301) and exit facet (302), the described plane of incidence (301) is the one side of lampshade body (3) envelope light source, the described plane of incidence (301) and exit facet (302) are located at respectively the inside and outside both sides of lampshade body (3), it is characterized in that: described exit facet (302) is continuous curve surface, and the described plane of incidence (301) is provided with several projections (4) that forms around the central shaft revolution of lampshade body (3).
2. LED luminous intensity distribution lampshade according to claim 1, it is characterized in that: described projection (4) is combined by working face (401) and non-working surface (402), enter lampshade body (3) from the incident ray (505) of light source by working face (401) and form refracted ray (506), and form the emergent ray (507) export to lampshade body (3) at exit facet (302), the normal that described incident ray (505) is located at working face (401) is the first normal (501), described refracted ray (506) is the second normal (502) at the normal of exit facet (302), angle (503) between described the first normal and the second normal is greater than 0 °, angle (503) between described the first normal and the second normal refers to that the first normal (501) is around the intersection point rotation of the first normal (501) with the second normal (502), until the minimum angles value that the first normal (501) and the second normal (502) overlap, and the angle that is rotated in a clockwise direction＞0 °, the angle of rotating in the counterclockwise direction＜0 °.
3. LED luminous intensity distribution lampshade according to claim 2, it is characterized in that: the angle (504) between described refracted ray and the second normal is less than the angle of total reflection of described lampshade body (3).
4. LED luminous intensity distribution lampshade according to claim 2, it is characterized in that: described working face (401) is formed by the central shaft revolution of the first bus around lampshade body (3), described non-working surface (402) is formed by the central shaft revolution of the second bus around lampshade body (3), and the angle between described the first bus and the second bus is 75 °～90 °.
5. arbitrary described LED luminous intensity distribution lampshade in 4 according to claim 1, it is characterized in that: described exit facet (302) is hair side.
6. an application is such as the LED light fixture of LED luminous intensity distribution lampshade as described in the claim 1 to 5, it is characterized in that: comprise the led light source that is arranged at radiator inside, described led light source is connected with driving power, and described radiator bottom is provided with joint, and described LED luminous intensity distribution lampshade is arranged at the led light source periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203954978U CN202791791U (en) | 2012-08-10 | 2012-08-10 | Light-emitting diode (LED) light distribution lamp cover and light-emitting diode (LED) lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203954978U CN202791791U (en) | 2012-08-10 | 2012-08-10 | Light-emitting diode (LED) light distribution lamp cover and light-emitting diode (LED) lamp |
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| Publication Number | Publication Date |
|---|---|
| CN202791791U true CN202791791U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203954978U Expired - Fee Related CN202791791U (en) | 2012-08-10 | 2012-08-10 | Light-emitting diode (LED) light distribution lamp cover and light-emitting diode (LED) lamp |
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| CN (1) | CN202791791U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258041A (en) * | 2015-10-23 | 2016-01-20 | 欧普照明股份有限公司 | Light distributing element, light source module and lighting lamp |
| CN105423216A (en) * | 2015-12-14 | 2016-03-23 | 成都恒坤光电科技有限公司 | Light ray collection device and headlamp |
| WO2017067482A1 (en) * | 2015-10-23 | 2017-04-27 | 欧普照明股份有限公司 | Light distribution element, light source module and lighting fixture |
| CN107062153A (en) * | 2017-06-13 | 2017-08-18 | 深圳市必拓电子有限公司 | LED lamp and lampshade |
-
2012
- 2012-08-10 CN CN2012203954978U patent/CN202791791U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258041A (en) * | 2015-10-23 | 2016-01-20 | 欧普照明股份有限公司 | Light distributing element, light source module and lighting lamp |
| WO2017067482A1 (en) * | 2015-10-23 | 2017-04-27 | 欧普照明股份有限公司 | Light distribution element, light source module and lighting fixture |
| CN105423216A (en) * | 2015-12-14 | 2016-03-23 | 成都恒坤光电科技有限公司 | Light ray collection device and headlamp |
| CN105423216B (en) * | 2015-12-14 | 2019-04-26 | 成都恒坤光电科技有限公司 | A kind of light collection device and headlamp |
| CN107062153A (en) * | 2017-06-13 | 2017-08-18 | 深圳市必拓电子有限公司 | LED lamp and lampshade |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20160810 |