CN104864295B - Light transmitting cover promoting illuminance evenness - Google Patents
Light transmitting cover promoting illuminance evenness Download PDFInfo
- Publication number
- CN104864295B CN104864295B CN201510292355.7A CN201510292355A CN104864295B CN 104864295 B CN104864295 B CN 104864295B CN 201510292355 A CN201510292355 A CN 201510292355A CN 104864295 B CN104864295 B CN 104864295B
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- CN
- China
- Prior art keywords
- refraction part
- cover body
- refraction
- light
- reflect
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a light transmitting cover promoting illuminance evenness. The light transmitting cover comprises a cover body for covering a light source in a surrounding mode. The cover body is a thin-shell-shaped ball arc body. A first refraction part protrudes out to the center of the cover body on the inner surface of the cover body. A first inner concave arc face is arranged on the upper surface of the first refraction part. A second refraction part, a third refraction part, a fourth refraction part and a fifth refraction part are arranged on the inner surfaces of the cover body on the two sides of the first refraction part respectively. A second inner-concave arc face is arranged on the upper surface of the second refraction part. The upper surface of the third refraction part protrudes out to form a first sharp angle. A first arc outer-protruding part and a second arc outer-protruding part are arranged on the upper surface of the fourth refraction part. The upper surface of the fifth refraction part protrudes out to form a second sharp angle. Even refraction light paths are provided for the light source, so that the illuminance in a lighting zone is even, refracted light after mounting is lowered, light loss is lowered, and illuminance is improved.
Description
Technical field
The present invention relates to diffuser, more particularly to beneficial to the diffuser of uniform-illumination.
Background technology
At present, the light source of LED lamp tube is sent after light, generally requires through diffuser to protect light source and circuit, not
Change light path, but, current diffuser generally existing is uneven according to the illumination (abbreviation of intensity of illumination) in area (such as desktop), i.e.,
In same illumination section, on luminous flat axis direction (light fixture vertical line direction) and its neighbouring region light intensity most
By force, illumination highest, away from the region of light fixture vertical line, illumination is gradually lowered.
For example, the first diffuser using slippery inner surface as shown in Figure 1, as shown in Figure 2 using sharp wave
Second diffuser of shape inner surface, the third diffuser using rectangular toothed inner surface as shown in Figure 3, such as Fig. 4 is illustrated
Employing arc transition waveform inner surface the 4th kind of diffuser, the optical path analysis in each figure of above diffuser can
Know, Fig. 1 can not change light path, Fig. 2, Fig. 3, Fig. 4 make light more dissipate, reduce irradiation area each point illumination, increased
The reflected light that fluorescent tube is beaten on lamp panel after installing, increased light loss.
Additionally, the concept of half-peak beam angle is：Between two given straight lines on by the plane of beam axis
Angle, this two straight lines respectively by the luminous point of light intensity 50% centered on the front center of module and luminous intensity, usually,
Still there is light beyond 120 degree of fluorescent tube, and just to reflect beyond fluorescent tube is arranged on 120 degree in fluorescent tube just can play illuminating effect,
And, the central light strength immediately below fluorescent tube is stronger, and this can make the illumination immediately below fluorescent tube higher than other positions, and this can affect entirety
Illuminating effect.
It is easy to cause visual fatigue during the light fixture of above-mentioned uneven illumination is illuminated indoors, therefore multiple lamps need to be configured
Tool carrys out the illumination in uniform indoor each region, but this will increase energy consumption and cost again.
The content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide beneficial to the diffuser of uniform-illumination, can be right
Light source provides the refractive light paths of rationally (internal outwards diverging, 120 ° of outsides in addition are inwardly drawn in), and illumination is more equal in Shi Zhao areas
It is even, it is to avoid the light loss that reflection is produced, so as to improve illumination.
The purpose of the present invention employs the following technical solutions realization：
Beneficial to the diffuser of uniform-illumination, including the cover body for shroud light source, the cover body is portion's ball arc body of shell shape,
The inner surface of the cover body is protruding with first refractive portion towards the center of cover body, and the upper surface in the first refractive portion is set to the first imploded arcs
Face；The cover body inner surface of the both sides in first refractive portion set up separately oriented cover body center protrusion the second refraction part, third reflect portion,
Fourth reflect portion and the 5th refraction part, the second refraction part, third reflect portion, fourth reflect portion and the 5th refraction part are along away from first
The direction of refraction part is arranged successively, and the upper surface of the second refraction part is set to the second inner concave arc surface, and the upper surface in third reflect portion is convex
Go out to be formed with the first wedge angle, the upper surface in fourth reflect portion is set to the first arc being connected successively along the direction away from first refractive portion
Shape male part and the second arc male part, the upper surface protrusion of the 5th refraction part is formed with the second wedge angle.
The first knuckle portion that is formed with is preferably located in the first refractive portion of the first inner concave arc surface both sides.
It is preferably located at the second inner concave arc surface side away from first refractive portion and is formed with the second knuckle portion.
Preferably, the first wedge angle is above first refractive portion, the second refraction part and fourth reflect portion.
Preferably, the second wedge angle is above first refractive portion, the second refraction part and fourth reflect portion.
Preferably, first refractive portion is located at the underface at cover body center.
Compared to existing technology, the beneficial effects of the present invention is：
Second refraction part of the present invention, third reflect portion, fourth reflect portion, the 5th refraction part are divided into successively first refractive
Portion both sides, first light of the order positioned at cover body center is able to be formed the refractive light paths for extending out, and by the first inner concave arc surface collection can be made
In light path on light source vertical line direction carry out refraction dispersion, formed with the illumination of the uniform vertical line direction and adjacent area
Even illumination, the second inner concave arc surface plays the role of approximate with the first inner concave arc surface；Further, the first wedge angle, the first arc
Male part increased light and reflect to outskirt, so as to increase the illumination of outskirt.Second arc male part and the second wedge angle will be originally
The light beaten on lamp panel reflection shield inwardly draws in, it is to avoid reflection loss, improves overall illumination.
Description of the drawings
Fig. 1 is the light path schematic diagram of existing the first diffuser；
Fig. 2 is the light path schematic diagram of existing second diffuser；
Fig. 3 is the light path schematic diagram of existing the third diffuser；
Fig. 4 is the light path schematic diagram of existing 4th kind of diffuser；
Cross section structure schematic diagram of Fig. 5 present invention beneficial to the diffuser of uniform-illumination.
Fig. 6 is diffuser light path schematic diagram of the present invention beneficial to uniform-illumination.
In figure：1st, cover body；11st, first refractive portion；111st, the first inner concave arc surface；112nd, the first knuckle portion；12nd, the second refraction
Portion；121st, the second inner concave arc surface；122nd, the second knuckle portion；13rd, third reflect portion；131st, the first wedge angle；14th, fourth reflect portion；
141st, the first arc male part；142nd, the second arc male part；15th, the 5th refraction part；151st, the second wedge angle；2nd, area is shone.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the present invention is described further：
Diffuser beneficial to uniform-illumination as shown in Figure 5, including the cover body 1 for shroud light source, the cover body 1 is shell
The ball arc body of shape, the inner surface of the cover body 1 is protruding with first refractive portion 11 towards the center of cover body 1, the first refractive portion 11 it is upper
Surface is set to the first inner concave arc surface 111；The inner surface of cover body 1 of the both sides in first refractive portion 11 sets up the middle cardiac prominence of oriented cover body 1 separately
The second refraction part 12, third reflect portion 13, the refraction part 15 of fourth reflect portion 14 and the 5th for going out, the second refraction part 12, the 3rd folding
Penetrate portion 13, the refraction part 15 of fourth reflect portion 14 and the 5th to arrange successively along the direction away from first refractive portion 11, the second refraction part
12 upper surface is set to the second inner concave arc surface 121, and the upper surface in third reflect portion 13 is protruded and is formed with the first wedge angle 131, and the 4th
The upper surface of refraction part 14 is set to the first arc male part 141 and second being connected successively along the direction away from first refractive portion 11
Arc male part 142, the upper surface protrusion of the 5th refraction part 15 is formed with the second wedge angle 151.
Wherein, as one preferred embodiment, the radian of the first inner concave arc surface 111 is 0.483 π；Second imploded arcs
The radian in face 121 is 0.191 π.Arc radius of the arc radius of the first inner concave arc surface 111 less than the second inner concave arc surface 121.
Because the second refraction part 12, third reflect portion 13, fourth reflect portion 14, the 5th refraction part 15 are divided into successively first
The both sides of refraction part 11, first light source of the order positioned at the center of cover body 1 is able to be formed the refractive light paths for extending out, by the first inner concave arc surface
111 can make the light path concentrated on light source vertical line direction carry out refraction dispersion, with the uniform vertical line direction and the photograph of adjacent area
Spend and form uniform illumination, the second inner concave arc surface 121 plays the role of approximate with the first inner concave arc surface 111；Further,
One wedge angle 131, the first arc male part 141 increased light and reflect to outskirt, so as to increase the illumination of outskirt.Outside second arc
The wedge angle 151 of convex portion 142 and second inwardly draws the light that script is beaten on lamp panel reflection shield in, it is to avoid reflection loss, improves whole
Body illumination.
Wherein, cover body 1, first refractive portion 11, the second refraction part 12 can adopt the plastic parts or glass of printing opacity to make, respectively
Element can be added independently, it is also possible to be integrally formed and made.Light source can typically adopt LED, located at the center of cover body 1.Formed
Light path and as shown in Figure 6 according to area 2.
Light to send light source is more uniformly radiated between two parties according in area 2, and first refractive portion 11 is located at cover body 1
The underface at center.
Bar shaped laser spot is formed preventing light from repeatedly being reflected and to reflect, positioned at the of the both sides of the first inner concave arc surface 111
The first knuckle portion 112 is formed with one refraction part 11.The side of the second inner concave arc surface 121 for being located remotely from first refractive portion 11 is formed
There is the second knuckle portion 122.
To enable, light is wider broadly to be reflected, and the first wedge angle 131 is above first refractive portion 11, the second refraction part
12 and fourth reflect portion 14.And in order to realize the roundabout refraction of light at the edge of cover body 1, the second wedge angle 151 is above the first folding
Penetrate portion 11, the second refraction part 12 and fourth reflect portion 14.
The diffuser of the present invention has withdrawn the light beyond 120 degree of the prior art by above-mentioned setting, finally improves light
Utilization rate, by the light at center to both sides dissipate, make illumination evenly.
As shown in Figure 6：
The light-emitting area of 180 degree is divided into into 12 parts, per 15 ° of portions
Along clockwise direction, light-emitting area is set to into 6a areas, 5a areas, 4a areas, 3a areas, 2a areas, 1a areas, 1b areas, 2b areas, 3b
Area, 4b areas, 5b areas, 6b areas.
Wherein：
1a areas, 1b areas are symmetrical light path；
2a areas, 2b areas are symmetrical light path；
3a areas, 3b areas are symmetrical light path；
4a areas, 4b areas are symmetrical light path；
5a areas, 5b areas are symmetrical light path；
6a areas, 6b areas are symmetrical light path；
6a areas, 3a areas are symmetrical light path；
5a areas, 4a areas are symmetrical light path；
6b areas, 3b areas are symmetrical light path；
5b areas, 4b areas are symmetrical light path.
Shade shows typical four regions in Fig. 6：1a areas, 2b areas, 3a areas, 4b areas, the shadow region has only represented
The region that initial line circle light path is enclosed.
Region 2a, 1a, 1b, 2b be using the first inner concave arc surface 111, the second inner concave arc surface 121 concavees lens principle come send out
Astigmatism line；
Region 6a, 5a, 4a, 3a, 3b, 4b, 5b, 6b are to assemble light using convex lens principle；
Region 5b, 4b, 4a, 5a with 6b, 3b, 3a, 6a region do not make a convex lens for material-saving, can also subtract
Few light loss；
Specifically, this example select printing opacity cover material be PMMA, refractive index 1.48.
1a areas:Boundary rays a：All incident, 90 degree of outgoing；
Boundary rays b：Air is to 75.51 degree of PMMA incidence angles, 40.86 degree of the angle of emergence；PMMA is to air incidence angle 27.16
Degree, 42.5 degree of the angle of emergence；
2b areas:Boundary rays a：All incident, 90 degree of outgoing；
Boundary rays b：Air is to 58.07 degree of PMMA incidence angles, 34.99 degree of the angle of emergence；PMMA is to air incidence angle 18.68
Degree, 28.3 degree of the angle of emergence；
3a areas:Boundary rays a：Air is to 53.07 degree of PMMA incidence angles, 32.69 degree of the angle of emergence；PMMA is to air incidence angle
18.68 degree, 28.3 degree of the angle of emergence；
Boundary rays b：Air is to 38.28 degree of PMMA incidence angles, 24.75 degree of the angle of emergence；PMMA is to air incidence angle 10.07
Degree, 15.0 degree of the angle of emergence；
4b areas:Boundary rays a：Air is to 31.85 degree of PMMA incidence angles, 20.89 degree of the angle of emergence；PMMA is to air incidence angle
10.07 degree, 15.0 degree of the angle of emergence；
Boundary rays b：All incident, 90 degree of angles of emergence.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (6)
1. beneficial to the diffuser of uniform-illumination, including the cover body for shroud light source, it is characterised in that：The cover body is shell shape
Ball arc body, the inner surface of the cover body is protruding with first refractive portion towards the center of cover body, and the upper surface in the first refractive portion is set to
One inner concave arc surface；The cover body inner surface of the both sides in first refractive portion set up separately the second refraction part of the center protrusion of oriented cover body, the
Three refraction parts, fourth reflect portion and the 5th refraction part, the second refraction part, third reflect portion, fourth reflect portion and the 5th refraction part
Arrange successively along the direction away from first refractive portion, the upper surface of the second refraction part is set to the second inner concave arc surface, third reflect portion
Upper surface protrusion be formed with the first wedge angle, the upper surface in fourth reflect portion is set to be held in the mouth successively along the direction away from first refractive portion
The the first arc male part for connecing and the second arc male part, the upper surface protrusion of the 5th refraction part is formed with the second wedge angle.
2. the diffuser beneficial to uniform-illumination according to claim 1, it is characterised in that：Positioned at the first inner concave arc surface both sides
First refractive portion on be formed with the first knuckle portion.
3. the diffuser beneficial to uniform-illumination according to claim 1, it is characterised in that：It is located remotely from first refractive portion
Second inner concave arc surface side is formed with the second knuckle portion.
4. the diffuser beneficial to uniform-illumination according to any one of claims 1 to 3, it is characterised in that：First wedge angle is high
For first refractive portion, the second refraction part and fourth reflect portion.
5. the diffuser beneficial to uniform-illumination according to any one of claims 1 to 3, it is characterised in that：Second wedge angle is high
For first refractive portion, the second refraction part and fourth reflect portion.
6. the diffuser beneficial to uniform-illumination according to any one of claims 1 to 3, it is characterised in that：First refractive portion
Positioned at the underface at cover body center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292355.7A CN104864295B (en) | 2015-05-29 | 2015-05-29 | Light transmitting cover promoting illuminance evenness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510292355.7A CN104864295B (en) | 2015-05-29 | 2015-05-29 | Light transmitting cover promoting illuminance evenness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104864295A CN104864295A (en) | 2015-08-26 |
| CN104864295B true CN104864295B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510292355.7A Expired - Fee Related CN104864295B (en) | 2015-05-29 | 2015-05-29 | Light transmitting cover promoting illuminance evenness |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090673A (en) * | 2016-08-09 | 2016-11-09 | 苏州光景照明科技有限公司 | A kind of luminous uniform LED |
| US10545269B2 (en) * | 2016-09-13 | 2020-01-28 | Canon Kabushiki Kaisha | Diffractive optical element and method of manufacturing the same |
| CN107092107A (en) * | 2017-05-23 | 2017-08-25 | 重庆森土科技发展有限公司 | Building outer wall decorative material dimming glass |
| EP3690311A4 (en) | 2017-09-28 | 2021-04-07 | Suzhou Opple Lighting Co., Ltd. | Lighting device |
| CN110686171A (en) * | 2019-10-16 | 2020-01-14 | 重庆电子工程职业学院 | Internet of things LED household lamp |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5159621B2 (en) * | 2006-06-13 | 2013-03-06 | パナソニック株式会社 | Compound lens and manufacturing method thereof |
| US7859772B2 (en) * | 2006-06-13 | 2010-12-28 | Panasonic Corporation | Composite optical element and method for manufacturing the same |
| JP5528287B2 (en) * | 2010-05-18 | 2014-06-25 | 株式会社エンプラス | Luminous flux control member, light emitting device, and illumination device |
| KR20120091646A (en) * | 2011-02-09 | 2012-08-20 | 주식회사 엘지화학 | Frenel lens structure and 2d-3d switchable autostereoscopic display apparatus |
| CN102767785A (en) * | 2011-05-05 | 2012-11-07 | 亿广科技(上海)有限公司 | Optical lens and lamp comprising same |
| CN203431725U (en) * | 2013-09-24 | 2014-02-12 | 广东宏磊达光电科技有限公司 | Strip-shaped LED lens |
| KR20140121758A (en) * | 2013-10-04 | 2014-10-16 | (주)애니캐스팅 | Side emitting light emitting diode lens |
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| Publication number | Publication date |
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| CN104864295A (en) | 2015-08-26 |
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Granted publication date: 20170510 Termination date: 20190529 |