CN202791792U - Lampshade and light-emitting diode (LED) lamp utilizing the same - Google Patents
Lampshade and light-emitting diode (LED) lamp utilizing the same Download PDFInfo
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- CN202791792U CN202791792U CN2012203956259U CN201220395625U CN202791792U CN 202791792 U CN202791792 U CN 202791792U CN 2012203956259 U CN2012203956259 U CN 2012203956259U CN 201220395625 U CN201220395625 U CN 201220395625U CN 202791792 U CN202791792 U CN 202791792U
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- lampshade
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Abstract
The utility model relates to a lampshade and a light-emitting diode (LED) lamp utilizing the same. The lampshade and the LED lamp utilizing the same comprise a lampshade body provided with an incident surface and an emergent surface. The incident surface is a side of the lampshade body, wherein the side of the lampshade envelops a light source. The incident surface and the emergent surface are respectively arranged on the inner side and the outer side of the lampshade body. A plurality of protrusions formed by revolving along a center shaft of the lampshade body are arranged on the incident surface, and the protrusions are formed by working faces and non-working faces in a combined mode. Normal lines of incident rays on the working faces are first normal lines, and normal lines of refracted rays on the non-working faces are second normal lines. Included angles between the first normal lines and the second normal lines are bigger than zero degree. Different from the method of adjusting scattering agent concentration in the prior art, light distribution of rays is achieved though the deflection angel between the incident surface and the emergent surface. Accordingly, the lampshade is high in luminous efficiency, and the lamp equipped with the lampshade is high in luminous efficiency.
Description
Technical field
The utility model relates to a kind of LED lamp distribution lampshade, particularly a kind of LED light fixture luminous intensity distribution lampshade of high light-emitting efficiency.
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, 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 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 located at respectively the inside and outside both sides of lampshade body, the described plane of incidence is provided with several projections that forms around the central shaft revolution of lampshade body, 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＞0 °, the angle of rotating in the counterclockwise direction＜0 °.Adopt said structure, be different from the prior art by adjusting the mode of scattering diluent concentration, light carries out luminous intensity distribution by the drift angle between the plane of incidence and the exit facet, 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, and its light extraction efficiency of light fixture that is equipped with such lampshade is high.
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, and described non-working surface is formed by the central shaft revolution of the second bus around the lampshade body, and the 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 arranged to after 75 °～90 °, can make incident ray pass through the plane of incidence fully reflects, improve the emergent ray uniformity, and enlarge light source in the light angle of lighting space.
Preferably, described the first bus is mutually vertical with the 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 light source in the light angle of lighting space.
Preferably, described the first normal and the 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 light source in the light angle of lighting space.
Preferably, described the 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 light source in the light angle of lighting space.
Preferably, described the second bus is 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 light source in the light angle of lighting space.
Preferably, described projection 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 light source in the light angle of lighting space, and with after the whole stepped curved surface of the plane of incidence, each differing heights place is protruding corresponding axially, the first normal is different from the angle between the second normal, therefore, the emergent ray drift angle that is positioned at the axial centre zone of stepped curved surface differs larger 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, make light that light source sends reasonable layout more in lighting space.
Preferably, described exit facet is made of a plurality of discrete scales.Adopt such structure, the scattering degree that increases to the light of edge outgoing from the center is reached unanimity, improved to a certain extent the emergent ray uniformity.
Preferably, described exit facet is hair side.Adopt such structure, can make light distribute more even at lighting space.
Preferably, described exit facet is continuous mirror surface.Adopt such structure, can make the light transmittance of light higher.Need to prove that continuous mirror surface herein refers to one whole section minute surface that curvature is continuous.
A kind of LED light fixture of using above-mentioned 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.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 beneficial effects of the utility model are: be different from the prior art by adjusting the mode of scattering diluent concentration, light carries out luminous intensity distribution by the drift angle between the plane of incidence and the exit facet, 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 lampshade;
Fig. 4 is the structural representation of a kind of embodiment of the utility model lampshade;
Fig. 5 is the local enlarged diagram of the utility model 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. 5 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; Scale-601.
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
Such as 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, 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 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, 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
As shown in Figure 4, be different from the exit facet 302 of the continuous curvature among the embodiment 1, exit facet 302 in the present embodiment is made of a plurality of discrete scales 601, each scale 601 is the quadrangle shape, and scale 601 surfaces are hair side, improved emergent ray 507 uniformities, in all the other embodiments, exit facet 302 is continuous surface also.
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, 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 lampshade of envelope led light source, 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 (9)
1. 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: the described plane of incidence (301) is provided with several projections (4) that forms around the central shaft revolution of lampshade body (3), 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 °.
2. lampshade according to claim 1, it is characterized in that: the angle (504) between described refracted ray (506) and the second normal is less than the angle of total reflection of described lampshade body (3).
3. lampshade according to claim 1, 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 °.
4. lampshade according to claim 3, it is characterized in that: the normal of the normal of described the first bus and the second bus is mutually vertical.
5. arbitrary described lampshade in 4 according to claim 1, it is characterized in that: described projection (4) forms stepped curved surface along the axially-aligned of lampshade body (3).
6. lampshade according to claim 5, it is characterized in that: described exit facet (302) is made of a plurality of discrete scales (601).
7. lampshade according to claim 5, it is characterized in that: described exit facet (302) is hair side.
8. lampshade according to claim 5, it is characterized in that: described exit facet (302) is continuous mirror surface.
9. an application is such as the LED light fixture of lampshade as described in the claim 1 to 8, and 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203956259U CN202791792U (en) | 2012-08-10 | 2012-08-10 | Lampshade and light-emitting diode (LED) lamp utilizing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203956259U CN202791792U (en) | 2012-08-10 | 2012-08-10 | Lampshade and light-emitting diode (LED) lamp utilizing the same |
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| Publication Number | Publication Date |
|---|---|
| CN202791792U true CN202791792U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203956259U Expired - Lifetime CN202791792U (en) | 2012-08-10 | 2012-08-10 | Lampshade and light-emitting diode (LED) lamp utilizing the same |
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| CN (1) | CN202791792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788309A (en) * | 2012-08-10 | 2012-11-21 | 霍永峰 | Lampshade and light-emitting diode (LED) luminaire applying same |
| WO2019062718A1 (en) * | 2017-09-28 | 2019-04-04 | 苏州欧普照明有限公司 | Lighting device |
-
2012
- 2012-08-10 CN CN2012203956259U patent/CN202791792U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788309A (en) * | 2012-08-10 | 2012-11-21 | 霍永峰 | Lampshade and light-emitting diode (LED) luminaire applying same |
| WO2019062718A1 (en) * | 2017-09-28 | 2019-04-04 | 苏州欧普照明有限公司 | Lighting device |
| US11131439B2 (en) | 2017-09-28 | 2021-09-28 | Opple Lighting Co., Ltd. | Lighting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: CHENGDU HERCULUX OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Assignor: Huo Yongfeng Contract record no.: 2014510000006 Denomination of utility model: Lampshade and light-emitting diode (LED) luminaire applying same Granted publication date: 20130313 License type: Exclusive License Record date: 20140214 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |