CN101725899A - Lighting device - Google Patents
Lighting device Download PDFInfo
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- CN101725899A CN101725899A CN200810304867A CN200810304867A CN101725899A CN 101725899 A CN101725899 A CN 101725899A CN 200810304867 A CN200810304867 A CN 200810304867A CN 200810304867 A CN200810304867 A CN 200810304867A CN 101725899 A CN101725899 A CN 101725899A
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- optical sheet
- lighting device
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- ridge structures
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Abstract
A lighting device comprises a lamphouse and a plurality of light-emitting diodes (LEDs) which are arranged on a baseplate of the lamphouse. The lighting device also comprises a first optical plate arranged above the LEDs. The first optical plate comprises a light incoming surface, a light exiting surface opposite to the light incoming surface and a plurality of V-shaped ridge structures which are formed on the light exiting surface and extend along at least two different directions. The V-shaped ridge structures are mutually interlaced. The emergent rays of the lighting device have better uniformity, thus weakening ghosting.
Description
Technical field
The present invention relates to a kind of lighting device, relating in particular to a kind of is the lighting device of light source with the light emitting diode.
Background technology
Light emitting diode (LED) has the advantage of no mercury, luminous efficiency height, long service life.Along with the maturation of LED technology, utilize LED to go on the market successively as the lighting device of light source.At present, the LED lighting device has been applied to numerous areas such as street illumination, residential lighting, communication equipment, Medical Devices, industrial equipment.
See also Fig. 1, a kind ofly comprise a lamp box (figure does not show) as the lighting device 100 of light source and be arranged on a plurality of light emitting diodes 12 on the lamp box base plate 11 with LED.During use, a plurality of light that send from light emitting diode 12 shine to object 14 with different angles, and make object 14 stay multiple shadow (indicating) on detecting face 16, have so just reduced quality of lighting.In actual applications, as start writing when writing or undergoing surgery, ghost phenomena tends to cause visual fatigue or operate miss.
Summary of the invention
In view of above-mentioned condition, be necessary to provide a kind of lighting device that weakens ghost image.
A kind of lighting device, it comprises a lamp box and a plurality of light emitting diode, these a plurality of light emitting diodes are arranged on the base plate of this lamp box.This lighting device also comprises first optical sheet that is set in turn in this a plurality of light emitting diodes top.This first optical sheet comprises an incidence surface and an exiting surface relative with this incidence surface, and a plurality of V-type ridge structures that are formed at least two the different directions extensions in edge of this exiting surface, and this is interlaced along a plurality of V-type ridge structures that different directions extends.
First optics of described lighting device is arranged at a plurality of light emitting diodes top, the micro-structural of its exiting surface can make the light of injecting first optical sheet that specific optical effects such as refraction, reflection and diffraction take place, light is spread and in the certain viewing angles scope, assemble, thereby form the even brightness area source.Described lighting device can form uniform emergent ray, and it shines on object, can weaken ghost phenomena, improves lighting quality.
Description of drawings
Fig. 1 is the schematic diagram that a kind of lighting device produces ghost image when using.
Fig. 2 is the generalized section of the lighting device of the embodiment of the invention one.
Fig. 3 is the stereogram of first optical sheet of lighting device shown in Figure 2.
Fig. 4 is that LED source among Fig. 2 is through resolution chart behind the first optical sheet optical effect shown in Figure 3.
Fig. 5 is the stereogram of first optical sheet of embodiment two.
Fig. 6 is the stereogram of first optical sheet of embodiment three.
The specific embodiment
Below in conjunction with drawings and Examples lighting device of the present invention is described in further detail.
See also Fig. 2, the lighting device 200 of the embodiment of the invention one comprises a lamp box 22, a plurality of light emitting diode 24, one first optical sheet 26, second optical sheet 28 and a transparent protection plate 30.A plurality of light emitting diodes 24 are arranged on the base plate of lamp box 22.First optical sheet 26 and second optical sheet 28 are located in the lamp box 22 and are arranged at intervals at the top of a plurality of light emitting diodes 24 successively.Transparent protection plate 30 is covered on the opening part of lamp box 22.The distance that first optical sheet 26 and a plurality of light emitting diodes 24 are certain at interval and form the certain distance in one first diffusion space, 31, the second optical sheets 28 and first optical sheet, 26 intervals and form one second diffusion space 32.
See also Fig. 3, first optical sheet 26 comprises incidence surface 260 and the exiting surface 261 relative with incidence surface 260.Incidence surface 260 is smooth surface, and it is positioned at the side near a plurality of light emitting diodes 24.
First optical sheet 26 forms along first direction X at exiting surface 261
1The a plurality of first V-type ridge structures 262 that extend, along second direction X
2The a plurality of second V-type ridge structures 263 that extend, along third direction X
3A plurality of the 3rd V-type ridge structures 264 that extend and along the four directions to X
4A plurality of the 4th V-type ridge structures 265 that extend.Above-mentioned V-type ridge structure along the different directions extension is interlaced.Wherein, along second direction X
2The a plurality of second V-type ridge structures 263 that extend with along the four directions to X
4A plurality of the 4th V-type ridge structures 265 that extend all pass through along first direction X
1The first V-type ridge structure 262 that extends with along third direction X
3Intersection point between the 3rd V-type ridge structure 264 that extends.Four direction X
1, X
2, X
3And X
4In angle between adjacent two directions be 45 degree.The span of the drift angle of the vertical section of above-mentioned all V-type ridge structures be 80 degree to 100 degree, the equidirectional centre distance that between the adjacent V-type ridge structure can be 0.025 millimeter to 1 millimeter.In the present embodiment, four direction X
1, X
2, X
3And X
4Centre distance between the adjacent V-type ridge structure is respectively D
1, D
2, D
3With D
4, and D
1=D
3=D
2=D
4In addition, need to prove:, can adjust the rate of adding lustre to and the bright dipping visual angle of first optical sheet 26 to a certain extent by adjusting the size of drift angle.First, second, third, fourth V-type ridge structure 262,263,264,265 is interlaced, and form a plurality of triangular pyramid grooves 266, closely link to each other between a plurality of triangular pyramid grooves 266, wherein four interconnective interconnective sidewalls with triangular pyramid groove 266 of common tie point form four jiaos of stars 267.A plurality of four jiaos of stars 267 are arranged in array.
The general thickness of first optical sheet 26 can be 0.4 millimeter to 4 millimeters.First optical sheet 26 can be formed by one or more the material injection mo(u)lding in polymethyl methacrylate, Merlon, polystyrene, the styrene methyl methacrylate copolymer.Need in the preparation process on mould, to be provided with and triangular pyramid groove 266 corresponding bulge-structures, so that make first optical sheet 26 can moulding in the single injection process.
The material of second optical sheet 28 and structure are identical with first optical sheet 26.
In the present embodiment lighting device 200, first optical sheet 26 and second optical sheet 28 are positioned at the inside of lamp box 22, and it can or be fixed in by bonding mode on the madial wall of lamp box 22 by the bracing frame support.First optical sheet 26 and second optical sheet 28 are arranged at intervals at the top of a plurality of light emitting diodes 24 successively, first optical sheet 26 can actual conditions adjust with the distance at light emitting diode 24 intervals and the distance at second optical sheet 28 and first optical sheet, 26 intervals, usually, under the identical situation of outgoing light homogeneity, the degree of depth of lamp box 22 becomes anti-square with the quantity of light emitting diode 24, when the quantity of light emitting diode 24 more for a long time, the degree of depth of lamp box 22 is less, first optical sheet 26 can be provided with smallerly with the distance at light emitting diode 24 intervals and the distance at second optical sheet 28 and first optical sheet, 26 intervals, when the negligible amounts of light emitting diode 24, the degree of depth of lamp box 22 is bigger, and first optical sheet 26 correspondingly is provided with more greatly with the distance at light emitting diode 24 intervals and the distance at second optical sheet 28 and first optical sheet, 26 intervals.
During use, the light that light emitting diode 24 is launched enters first optical sheet 26 after through first diffusion space, 31 diffusions, because the exiting surface 261 of first optical sheet 26 is formed with the triangular pyramid groove 266 of specific configuration, make light that specific optical effects such as refraction, scattering, reflection and diffraction take place in first optical sheet 26, light is diffuseed to form a plurality of virtual light sources, light is assembled in the certain viewing angles scope.The light that light emitting diode 24 sends through first optical sheet 26 after, form eight virtual light sources that are surrounded on light emitting diode 24.These a plurality of virtual light sources enter second optical sheet 28 after through second diffusion space, 32 diffusions.Because second optical sheet, 28 exiting surfaces are formed with the inclined surface structure of the triangular pyramid groove of specific configuration, make these a plurality of virtual light sources that spread further form more virtual light source, simultaneously evenly with the light diffusion.
This shows, in lighting device 200, first optical sheet 26 and the special surface texture of second optical sheet, 28 exiting surfaces, make light that specific optical effects such as refraction, scattering, reflection and diffraction take place, light is diffuseed to form a plurality of virtual light sources and in the certain viewing angles scope, assemble, thereby form the even brightness area source.In actual applications, the light that lighting device 200 sends shines equably on object and is basic identical with respect to the incidence angle of object, thereby makes object only stay single shadow on detecting face, has avoided the generation of ghost phenomena.
See also Fig. 5, be depicted as first optical sheet 46 of the embodiment of the invention two.First optical sheet 46 has similar structure to first optical sheet 26, and its difference is: exiting surface 461 is formed with a plurality of strip V-type ridge structures that extend along three different directions, and is interlaced along a plurality of strip V-type ridge structures that different directions extends.Wherein a plurality of V-type ridge structures that extend along direction by in addition along two different directions extend and a plurality of V-type ridge structures of intersecting between intersection point.The drift angle of a plurality of strip V-type ridge structures is 50 to 120 degree.Similar with first optical sheet 26, specific optical effect takes place in the light that first optical sheet 46 can make light emitting diode 24 send, and light is assembled in the certain viewing angles scope.
See also Fig. 6, be depicted as first optical sheet 66 of the embodiment of the invention three, its first optical sheet 26 to embodiment one is similar, its difference is: on the exiting surface 661 of first optical sheet 66, be formed with the strip V-arrangement ridge structure that extends along two different directions, promptly a plurality of be parallel to each other along first direction Z
1The strip V-arrangement ridge structure 662 that extends and a plurality of parallel along second direction Z mutually
2The strip V-arrangement ridge structure 663 that extends, and first direction Z
1The strip V-arrangement ridge structure 662 and the second direction Z that extend
2The strip V-arrangement ridge structure 663 that extends intersects vertically.
The surface micro-structure of second optical sheet 28 can be identical with the surface micro-structure of first optical sheet 26,46,66, promptly be formed with a plurality of V-type ridge structures that extend along at least two different directions on the exiting surface of second optical sheet 28, a plurality of V-type ridge structures that different directions extends are interlaced.
Need to prove, when first optical sheet and second optical sheet are applied to lighting device 200, the surface texture of the two exiting surface can be inequality, as: when the exiting surface of first optical sheet had along strip V-arrangement ridge structure that four direction extends, the exiting surface of second optical sheet can be had strip V-arrangement ridge structure that extends along both direction or the strip V-arrangement ridge structure that extends along three directions.
Be appreciated that, second optical sheet also can omit, specific optical effects such as refraction, reflection and diffraction take place in the light that lighting device 200 can only utilize the micro-structural of first optical sheet and exiting surface thereof to make and inject first optical sheet, thereby light is spread and in the certain viewing angles scope, assemble, form brightness than uniform surface light source.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included in the present invention's scope required for protection.
Claims (10)
1. lighting device, it comprises a lamp box and a plurality of light emitting diode, these a plurality of light emitting diodes are arranged on the base plate of this lamp box, it is characterized in that: this lighting device also comprises first optical sheet that is arranged at this a plurality of light emitting diodes top, this first optical sheet comprises an incidence surface and an exiting surface relative with this incidence surface, and a plurality of V-type ridge structures that are formed at least two the different directions extensions in edge of this exiting surface, this is interlaced along a plurality of V-type ridge structures that different directions extends.
2. the lighting device shown in claim 1, it is characterized in that: this lighting device further comprises second optical sheet that is arranged at this first optical sheet top, this second optical sheet comprises an incidence surface and an exiting surface relative with this incidence surface, and a plurality of V-type ridge structures that are formed at least two the different directions extensions in edge of this exiting surface, this is interlaced along a plurality of V-type ridge structures that different directions extends.
3. lighting device as claimed in claim 1 is characterized in that: these a plurality of V-type ridge structures that are formed at the exiting surface of this first optical sheet extend along two different directions, and a plurality of V-type ridge structures of these two different bearing of trends intersect.
4. lighting device as claimed in claim 1, it is characterized in that: these a plurality of V-type ridge structures that are formed at the exiting surface of this first optical sheet extend along three different directions, wherein a plurality of V-type ridge structures that extend along a direction by in addition along two different directions extend and a plurality of V-type ridge structures of intersecting between intersection point.
5. lighting device as claimed in claim 1, it is characterized in that: these a plurality of V-type ridge structures that are formed at the exiting surface of this first optical sheet extend along four different directions, and wherein the V-type ridge structure that extends along both direction passes through along the intersection point between the V-type ridge structure of two other direction extension.
6. lighting device as claimed in claim 2 is characterized in that: these a plurality of V-type ridge structures that are formed at the exiting surface of this second optical sheet extend along two different directions, and these a plurality of V-type ridge structures along two different bearing of trends intersect.
7. lighting device as claimed in claim 2, it is characterized in that: these a plurality of V-type ridge structures that are formed at the exiting surface of this second optical sheet extend along three different directions, wherein a plurality of V-type ridge structures that extend along a direction by in addition along two different directions extend and a plurality of V-type ridge structures of intersecting between intersection point.
8. lighting device as claimed in claim 2, it is characterized in that: these a plurality of V-type ridge structures that are formed at the exiting surface of this second optical sheet extend along four different directions, and wherein the V-type ridge structure that extends along both direction passes through along the intersection point between the V-type ridge structure of two other direction extension.
9. lighting device as claimed in claim 2 is characterized in that: this first optical sheet and this second optical sheet are formed by one or more the material injection mo(u)lding in polymethyl methacrylate, Merlon, polystyrene, the styrene methyl methacrylate copolymer.
10. lighting device as claimed in claim 1 is characterized in that: this lighting device also comprises a transparent protection plate, and this transparent protection plate is covered on the opening part of lamp box.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810304867A CN101725899A (en) | 2008-10-10 | 2008-10-10 | Lighting device |
| US12/319,040 US7862192B2 (en) | 2008-08-04 | 2008-12-31 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810304867A CN101725899A (en) | 2008-10-10 | 2008-10-10 | Lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101725899A true CN101725899A (en) | 2010-06-09 |
Family
ID=42447207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810304867A Pending CN101725899A (en) | 2008-08-04 | 2008-10-10 | Lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101725899A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886764A (en) * | 2010-07-26 | 2010-11-17 | 鸿富锦精密工业（深圳）有限公司 | LED area light source device |
| CN101886765A (en) * | 2010-07-26 | 2010-11-17 | 鸿富锦精密工业（深圳）有限公司 | LED area light source device |
| CN101936478A (en) * | 2010-09-24 | 2011-01-05 | 鸿富锦精密工业（深圳）有限公司 | Led point light source device |
| CN102767705A (en) * | 2011-05-06 | 2012-11-07 | 中央大学 | high-directivity light source device |
| CN106090699A (en) * | 2015-04-30 | 2016-11-09 | 亿城精密光电股份有限公司 | Lamp capable of changing light type along with visual angle |
-
2008
- 2008-10-10 CN CN200810304867A patent/CN101725899A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886764A (en) * | 2010-07-26 | 2010-11-17 | 鸿富锦精密工业（深圳）有限公司 | LED area light source device |
| CN101886765A (en) * | 2010-07-26 | 2010-11-17 | 鸿富锦精密工业（深圳）有限公司 | LED area light source device |
| CN101936478A (en) * | 2010-09-24 | 2011-01-05 | 鸿富锦精密工业（深圳）有限公司 | Led point light source device |
| CN101936478B (en) * | 2010-09-24 | 2012-01-25 | 鸿富锦精密工业（深圳）有限公司 | Led point light source device |
| CN102767705A (en) * | 2011-05-06 | 2012-11-07 | 中央大学 | high-directivity light source device |
| CN102767705B (en) * | 2011-05-06 | 2014-09-24 | 中央大学 | high-directivity light source device |
| CN106090699A (en) * | 2015-04-30 | 2016-11-09 | 亿城精密光电股份有限公司 | Lamp capable of changing light type along with visual angle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100609 |