CN101644859A - Direct backlight module - Google Patents
Direct backlight module Download PDFInfo
- Publication number
- CN101644859A CN101644859A CN200810303372A CN200810303372A CN101644859A CN 101644859 A CN101644859 A CN 101644859A CN 200810303372 A CN200810303372 A CN 200810303372A CN 200810303372 A CN200810303372 A CN 200810303372A CN 101644859 A CN101644859 A CN 101644859A
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- strip
- optical sheet
- ridge structures
- arrangement ridge
- mode set
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Abstract
The invention relates to a direct backlight module which comprises a frame, a plurality of light-emitting diodes arranged at the bottom of the frame, as well as a first optical plate and a second optical plate that are sequentially arranged above the light-emitting diodes at intervals, wherein the first optical plate and the second optical plate respectively comprise a light entry surface and a light exit surface which is opposite to the light entry surface, as well as a plurality of long-strip V-shaped ridge structures which are formed at the light exit surface, extend along at least two different directions and are mutually staggered. The direct backlight module has better exit ray uniformity and is suitable for thinned design.
Description
Technical field
The present invention relates to a kind of down straight aphototropism mode set, relate in particular to a kind of down straight aphototropism mode set that is applied to liquid crystal display.
Background technology
Liquid crystal indicator is widely used in the electronic products such as personal digital assistant, notebook computer, digital camera, mobile phone, LCD TV.But because liquid crystal indicator itself can not be luminous, so it need could produce Presentation Function by module backlight.
See also Fig. 1, a kind of module 100 backlight, it comprises 10, one reflecting plates 12 of framework, a plurality of LED (light emitting diode) pointolite 14, a diffuser plate 16 and an a plurality of optical sheet 18.These a plurality of LED pointolites 14 are arranged on the base plate of framework 10, and a plurality of optical sheets 18 are covered on the opening part of framework 10.Diffuser plate 16 is arranged at intervals between LED pointolite 14 and a plurality of optical sheet 18, thereby will be divided into first and second diffusion space 19,20 in the framework 10.Diffuser plate 16 is made by the resin material that contains scattering particle.These a plurality of optical sheets 18 comprise prismatic lens, diffusion sheet or polarization by refraction film.
During use, the light that is produced by a plurality of LED pointolites 14 enters diffuser plate 16 after through first diffusion space 19, after diffuser plate 16 diffusions, light enters second diffusion space 20 and spreads, after passing through the diffusion or congregation of a plurality of optical sheets 18 at last, evenly outgoing in the certain viewing angles scope.
Though yet the light that sends from LED pointolite 14 but still is difficult to avoid the generation of pointolite 14 light source ghosts through repeatedly diffusion, promptly form the high and darker zone of center brightness on every side.In order to reduce the generation of light source ghost as far as possible, industry can increase the degree of depth of framework 10 usually, promptly increases the height of first and second diffusion space 19,20.Yet the degree of depth that increases framework will reduce the brightness of emergent light, and can cause the thickness of module 100 backlight bigger, be difficult to satisfy the slimming designing requirement.If corresponding increase pointolite, power can increase consumption.
Summary of the invention
In view of above-mentioned condition, be necessary to provide the module backlight of the preferable and thinner thickness of a kind of emergent ray homogeneity.
A kind of down straight aphototropism mode set, it comprises framework, be arranged at a plurality of light emitting diodes of base of frame, be arranged at intervals at first optical sheet and second optical sheet of this a plurality of light emitting diodes top successively.First optical sheet includes an incidence surface and the exiting surface relative with incidence surface with second optical sheet, and a plurality of strip V-arrangement ridge structures that are formed at least two the different directions extensions in edge of this exiting surface, a plurality of strip V-arrangement ridge structures that different directions extends are interlaced.
The light that light emitting diode in the above-mentioned down straight aphototropism mode set is launched enters first optical sheet through after the space diffusion, because the first optical sheet exiting surface microstructure, makes light diffuse into a plurality of virtual light sources for the first time and assembles in the certain viewing angles scope; Follow after the light of the first optical sheet outgoing spreads through the space again and enter second optical sheet, because the second optical sheet exiting surface microstructure, make from the light of the second optical sheet outgoing specific optical effects such as refraction, scattering, reflection and diffraction take place, thereby with the light diffusion evenly, avoided the generation of light source ghost in the time of with the further virtual light sourceization of light.Simultaneously, light autoluminescence diode injects in the process that is incident to second optical sheet, has passed through the space diffusion twice, thereby has extended light path and strengthened the space diffusion effect of light, and then realizes the slimming design of this down straight aphototropism mode set.
Description of drawings
Fig. 1 is a kind of diagrammatic cross-section of down straight aphototropism mode set.
Fig. 2 is the diagrammatic cross-section of the down straight aphototropism mode set of the embodiment of the invention one.
Fig. 3 is the stereographic map of first optical sheet of down straight aphototropism mode set shown in Figure 2.
Fig. 4 is the diagrammatic cross-section of first optical sheet shown in Figure 3 along the IV-IV direction.
Fig. 5 is the stereographic map of first optical sheet of the embodiment of the invention two.
Fig. 6 is the stereographic map of first optical sheet of the embodiment of the invention three.
Fig. 7 is the diagrammatic cross-section of the down straight aphototropism mode set of the embodiment of the invention four.
Embodiment
Below in conjunction with drawings and Examples down straight aphototropism mode set 200 of the present invention is described in further detail.
See also Fig. 2, be depicted as the down straight aphototropism mode set 200 of the embodiment of the invention one, it comprises framework 21, a plurality of light emitting diode 23, first optical sheet 24, second optical sheet 25 and a plurality of optical sheet 26.Wherein a plurality of light emitting diodes 23 are arranged at framework 21 bottoms, first optical sheet 24 and second optical sheet 25 are arranged at intervals at light emitting diode 23 tops successively, thereby framework 21 is divided into first and second diffusion space 27,28, and a plurality of optical sheets 26 are arranged at second optical sheet, 25 tops.
Framework 21 can be made by metal with high reflectance or plastics, or the metal or the plastics that are coated with highly reflective coatint are made.
See also Fig. 3 and Fig. 4, first optical sheet 24 is a transparent bodies, and it comprises incidence surface 241 and the exiting surface 243 relative with this incidence surface 241.Incidence surface 241 is a plane.Optical sheet 24 forms the strip V-arrangement ridge structure that extends along at least two different directions on exiting surface 243, and a plurality of strip V-arrangement ridge structures that different directions extends are interlaced.Have a plurality of in the present embodiment along first direction X
1The strip V-arrangement ridge structure 244 that extends, a plurality of along second direction X
2The strip V-arrangement ridge structure 245 that extends, a plurality of along third direction X
3The strip V-arrangement ridge structure 246 that extends and a plurality of along the four directions to X
4The strip V-arrangement ridge structure 247 that extends is wherein along second direction X
2The a plurality of strip V-arrangement ridge structures 245 that extend and along the four directions to X
4The a plurality of strip V-arrangement ridge structures 247 that extend pass through this along first direction X
1With along third direction X
3The intersection of a plurality of strip V-arrangement ridge structures 244,246 that extend, and this four direction X
1, X
2, X
3And X
4Angle between adjacent two directions is 45 degree, and should be along a plurality of close-connected triangular pyramid grooves 248 of strip V-arrangement ridge structure 244,245,246,247 interlaced formations of four different directions extensions.Per four interconnective triangular pyramid groove 248 and interconnective sidewalls thereof with common tie point form four jiaos of stars 249.A plurality of four jiaos of stars 249 are arranged in array.In addition, the span of these strip V-arrangement ridge structure 244,245,246,247 vertical section vertex angle theta can be 80 degree to 100 degree, and the equidirectional centre distance P that between the adjacent strip V-arrangement 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 strip V-arrangement ridge structure 244,245,246,247 is D respectively
1, D
2, D
3With D
4,
In addition, need to prove, can adjust the rate of adding lustre to and the bright dipping visual angle of first optical sheet 24 to a certain extent by adjusting the size of vertex angle theta.
The general thickness T of first optical sheet 24 can be 0.4 millimeter to 4 millimeters.First optical sheet 24 can be formed by one or more the material injection mo(u)lding in polymethylmethacrylate, polycarbonate, polystyrene, the styrene-methylmethacrylate copolymer.Need in the preparation process on mould, to be provided with and triangular pyramid groove 244 corresponding bulge-structures, so that make first optical sheet 24 can moulding in the single injection process.
The structure of second optical sheet 25 and first optical sheet 24 is just the same.
A plurality of optical sheets 26 can be diffusion sheet, brightening piece or reflecting polarized wafer.
In the present embodiment module 200 backlight, first optical sheet 24 is positioned at framework 21 middle parts and can or be fixed in by bonding mode on the madial wall of framework 21 by the bracing frame support, and second optical sheet 25 is covered on the opening part of framework 21.Certainly, the visual actual conditions of the distance of the two adjust, usually, under the identical situation of outgoing light homogeneity, the degree of depth of framework 21 becomes anti-square with the quantity of light emitting diode 23, when the quantity of light emitting diode 23 more for a long time, the degree of depth of framework 21 is less, first optical sheet 24 and second optical sheet 25 distance at interval can be provided with smallerly, when the negligible amounts of light emitting diode 23, the degree of depth of framework 21 is bigger, and first optical sheet 24 and second optical sheet 25 distance at interval correspondingly are provided with more greatly.
During use, the light that light emitting diode 23 is launched enters first optical sheet 24 after through first space, 27 diffusions, because the exiting surface 243 of first optical sheet 24 has the inclined surface structure of the triangular pyramid groove 244 of specific configuration, make light in first optical sheet 24, optical effects such as specific refraction, scattering, reflection and diffraction take place, light is assembled in the certain viewing angles scope; Enter second optics after these a plurality of virtual light sources spread through second space 28 and pull 25, because second optical sheet, 25 exiting surfaces are formed with the inclined surface structure of the triangular pyramid groove 244 of specific configuration, when making the further virtual light sourceization of these a plurality of virtual light sources that spread with the light diffusion evenly.
A plurality of optical sheets 26 are covered on second optical sheet 25, can make emergent ray more soft, mild.Certainly, the spacing between light emitting diode 23 hour, a plurality of optical sheets 26 can omit.
This shows that first optical sheet 24 of the module backlight 200 of the embodiment of the invention one and the interval of second optical sheet 25 are provided with, make light obtain preferable space diffusion, help reducing the degree of depth of framework 21; First optical sheet 24 and the special surface structure of second optical sheet, 25 exiting surfaces, make light that specific optical effects such as refraction, scattering, reflection and diffraction take place, thereby with twice virtual light sourceization of light and diffusion and in the certain viewing angles scope, assemble, thereby form the even brightness area source.The mutual collocation of such two optical sheets in module backlight just can weaken even avoid the light source ghost, improves the light-emitting uniformity of module 200 backlight, can realize the slimming design of module 200 backlight simultaneously.
See also Fig. 5, be depicted as first optical sheet 34 of the embodiment of the invention two, its first optical sheet 24 to embodiment one is similar, and its difference is: the exiting surface 343 of first optical sheet 34 is formed with the strip V-arrangement ridge structure that extends along three different directions, and is promptly a plurality of along first direction extension Y
1Strip V-arrangement ridge structure 344, a plurality of along second direction Y
2The strip V-arrangement ridge structure 345 that extends and a plurality of along third direction Y
3The strip V-arrangement ridge structure 346 that extends.These are a plurality of along first direction Y
1The strip V-arrangement ridge structure 344 that extends is a plurality of along second direction Y with this
2The strip V-arrangement ridge structure 345 that extends intersects, and these are a plurality of along third direction Y
3The strip V-arrangement ridge structure 346 that extends is a plurality of along first direction Y through this
1With second direction Y
2The joining of the strip V-arrangement ridge structure that extends.In the present embodiment, first direction Y
1The strip V-arrangement ridge structure 344 that extends with along second direction Y
2Angle between 345 liang of directions of strip V-arrangement ridge structure of extending is 90 degree, third direction Y
3The strip V-arrangement ridge structure 346 that extends with along second direction Y
2Angle between strip V-arrangement ridge 345 structures two directions of extending is 45 degree.In addition, a plurality of triangular pyramid connected in stars 347 of the interlaced formation of strip V-arrangement ridge structure and rectangular pyramid connected in star 348 that this extends along three different directions, wherein each rectangular pyramid groove 348 surrounds by four adjacent triangular pyramid grooves 347, and a plurality of triangular pyramid groove 347 is arranged in array respectively with a plurality of rectangular pyramid grooves 348.
See also Fig. 6, be depicted as first optical sheet 44 of the embodiment of the invention three, its first optical sheet 24 to embodiment one is similar, its difference is: on the exiting surface 443 of first optical sheet 44, 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 445 that extends and a plurality of parallel along second direction Z mutually
2The strip V-arrangement ridge structure 446 that extends, and first direction Z
1The strip V-arrangement ridge structure 445 and the second direction Z that extend
2The strip V-arrangement ridge structure 446 that extends intersects vertically.
See also Fig. 7, be depicted as the down straight aphototropism mode set 500 of the embodiment of the invention four, down straight aphototropism mode set 500 is similar to down straight aphototropism mode set 200, first optical sheet 54 is identical with the surface structure of second optical sheet 55, its difference is: be added with scattering particle 547 in the transparent base of first optical sheet 54, scattering particle 547 can be one or more the potpourri in titanium dioxide fine particles, silicon dioxide microparticle and the acryl resin particulate.
Be appreciated that, the surface structure of the exiting surface of first optical sheet in the down straight aphototropism mode set of the present invention and the surface structure of the second optical sheet exiting surface can be inequality, that is: when the exiting surface of first optical sheet has along strip V-arrangement ridge structure that four direction extends, the exiting surface of second optical sheet can be to have along the strip V-arrangement ridge structure of both direction extension or the strip V-arrangement ridge structure that extends along three directions, too can conversely.In addition, also can in the transparent base of first optical sheet and second optical sheet, all add scattering particle.
In addition, those skilled in the art also can do other variation in spirit of the present invention.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. down straight aphototropism mode set, it comprises framework, is arranged at a plurality of light emitting diodes of base of frame, it is characterized in that: this down straight aphototropism mode set also comprises first optical sheet and second optical sheet that is arranged at intervals at this a plurality of light emitting diodes top successively, this first optical sheet includes an incidence surface and the exiting surface relative with this incidence surface with second optical sheet, and being formed at a plurality of strip V-arrangement ridge structures that at least two different directions in edge on this exiting surface extend, a plurality of strip V-arrangement ridge structures that this different directions extends are interlaced.
2. down straight aphototropism mode set as claimed in claim 1 is characterized in that: these a plurality of V-arrangement ridge structures that are formed at the exiting surface of this first optical sheet extend along two different directions, and a plurality of V-arrangement ridge structures that these two different directions extend intersect vertically.
3. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: these a plurality of V-arrangement ridge structures that are formed at the exiting surface of this first optical sheet extend along three different directions, wherein a plurality of strip V-arrangement ridge structures of a plurality of strip V-arrangement ridge structures of first direction extension and second direction extension are interlaced, and a plurality of strip V-arrangement ridge structures of third direction extension are through the joining of a plurality of strip V-arrangement ridge structures of these first directions and second direction extension.
4. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: these a plurality of V-arrangement ridge structures that are formed at the exiting surface of this first optical sheet extend along four different directions, wherein, a plurality of strip V-arrangement ridge structures that extend along first direction and a plurality of strip V-arrangement ridge structures that extend along third direction are interlaced, a plurality of strip V-arrangement ridge structures that extend along second direction and along the four directions to the intersection of a plurality of strip V-arrangement ridge structures that extend through these a plurality of strip V-arrangement ridge structures that extend along first direction with along third direction.
5. down straight aphototropism mode set as claimed in claim 1 is characterized in that: these a plurality of V-arrangement ridge structures that are formed at the exiting surface of this second optical sheet extend along two different directions, and a plurality of V-arrangement ridge structures that these two different directions extend intersect vertically.
6. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: these a plurality of V-arrangement ridge structures that are formed at the exiting surface of this second optical sheet extend along three different directions, wherein a plurality of strip V-arrangement ridge structures of extending of a plurality of strip V-arrangement ridge structures that extend of first direction and second direction are interlaced, and the joining of a plurality of strip V-arrangement ridge structures of extending through this first direction and second direction at interval of a plurality of strip V-arrangement ridge structures of extending of third direction.
7. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: these a plurality of V-arrangement ridge structures that are formed at the exiting surface of this second optical sheet extend along four different directions, wherein, a plurality of strip V-arrangement ridge structures that extend along first direction and a plurality of strip V-arrangement ridge structures that extend along third direction are interlaced, a plurality of strip V-arrangement ridge structures that extend along second direction and along the four directions to the intersection of a plurality of strip V-arrangement ridge structures that extend through these a plurality of strip V-arrangement ridge structures that extend along first direction with along third direction.
8. down straight aphototropism mode set as claimed in claim 1 is characterized in that: this first optical sheet is arranged at the middle part of framework, and this second optical sheet is arranged at the opening part of framework.
9. down straight aphototropism mode set as claimed in claim 1 is characterized in that: be added with scattering particle in the transparent base of this first optical sheet.
10. down straight aphototropism mode set as claimed in claim 1 is characterized in that: this second optical sheet top is provided with a plurality of optical sheets.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810303372A CN101644859A (en) | 2008-08-04 | 2008-08-04 | Direct backlight module |
| US12/319,040 US7862192B2 (en) | 2008-08-04 | 2008-12-31 | Lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810303372A CN101644859A (en) | 2008-08-04 | 2008-08-04 | Direct backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101644859A true CN101644859A (en) | 2010-02-10 |
Family
ID=41656799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810303372A Pending CN101644859A (en) | 2008-08-04 | 2008-08-04 | Direct backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101644859A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102237351A (en) * | 2010-04-30 | 2011-11-09 | 三星Led株式会社 | Light emitting device package, light source module, backlight unit, and illumination apparatus |
| CN105090778A (en) * | 2014-05-14 | 2015-11-25 | 璨圆光电股份有限公司 | Illumination device having broad lighting distribution |
| CN106662794A (en) * | 2014-06-26 | 2017-05-10 | 皇家飞利浦有限公司 | Led lighting unit |
| WO2022100445A1 (en) * | 2020-11-10 | 2022-05-19 | 苏州欧普照明有限公司 | Lighting lamp |
-
2008
- 2008-08-04 CN CN200810303372A patent/CN101644859A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102237351A (en) * | 2010-04-30 | 2011-11-09 | 三星Led株式会社 | Light emitting device package, light source module, backlight unit, and illumination apparatus |
| US8926114B2 (en) | 2010-04-30 | 2015-01-06 | Samsung Electronics Co., Ltd. | Light emitting device package, light source module, backlight unit, display apparatus, television set, and illumination apparatus |
| CN102237351B (en) * | 2010-04-30 | 2016-07-06 | 三星电子株式会社 | Light emitting device packaging piece, light source module, back light unit and illuminator |
| CN105090778A (en) * | 2014-05-14 | 2015-11-25 | 璨圆光电股份有限公司 | Illumination device having broad lighting distribution |
| CN105090778B (en) * | 2014-05-14 | 2018-11-02 | 晶元光电股份有限公司 | Go out the lighting device of light distribution with wide-angle |
| CN106662794A (en) * | 2014-06-26 | 2017-05-10 | 皇家飞利浦有限公司 | Led lighting unit |
| CN106662794B (en) * | 2014-06-26 | 2019-11-26 | 亮锐控股有限公司 | LED illumination unit |
| WO2022100445A1 (en) * | 2020-11-10 | 2022-05-19 | 苏州欧普照明有限公司 | Lighting lamp |
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| 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: 20100210 |