CN101620283B - Backlight module and diffusion plate thereof - Google Patents
Backlight module and diffusion plate thereof Download PDFInfo
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- CN101620283B CN101620283B CN2008103025471A CN200810302547A CN101620283B CN 101620283 B CN101620283 B CN 101620283B CN 2008103025471 A CN2008103025471 A CN 2008103025471A CN 200810302547 A CN200810302547 A CN 200810302547A CN 101620283 B CN101620283 B CN 101620283B
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- diffuser plate
- strip arc
- millimeter
- arc groove
- grooves
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Abstract
A diffusion plate is made of a transparent body doped with diffusion particles. The transparent body comprises a first surface and a second surface opposite to the first surface. The first surface is provided with a plurality of micro grooves which are all of rectangular pyramid shapes. Every six adjacent micro grooves with a common connection point form a hexagram. The second surface is provided with a plurality of long strip arc grooves which are parallel to each other. The radius of arc in the long strip arc groove is defined as R, the center distance of adjacent long strip arc grooves 204 is defined as P, the maximum depth of each long strip arc groove 204 is defined as H, then R, P and H satisfy the following relation: 0.025mm<=P<=1.5mm, 0.01mm<=R<=2P, and 0.01mm<=H<=R. The diffusion plate can improve efficient utilization ratio of light and enjoy high uniformity of light emission. The invention also relates a backlight module adopting the diffusion plate.
Description
Technical field
The present invention relates to a kind of module backlight and diffuser plate thereof, relate in particular to a kind of module backlight and diffuser plate thereof that is used for liquid crystal display.
Background technology
See also Fig. 1, be depicted as a kind of existing down straight aphototropism mode set 100, it comprises framework 11 and a plurality of light sources 12 that are arranged on these framework 11 inside and the diffuser plate 13 that is arranged on light source 12 tops and covers framework 11.
During use, can be spread behind the light entering diffuser plate 13 by a plurality of light sources 12 generations.Yet after diffuser plate 13 diffusions, light becomes comparatively mixed and disorderly from the shooting angle of diffuser plate 13, makes that its brightness in the certain viewing angles scope is not high; And because the light that light source transmits directly over 12 towards its is more, diffuser plate 13 still usually is difficult to directly will make to be easy to generate the light source ghost from the light of diffuser plate 13 outgoing from light source 12 light even diffused, the strong and weak different zone of light intensity promptly occurs.
For improving the brightness of module 100 backlight in the certain viewing angles scope, and the generation of avoiding the light source ghost, thereby improve module 100 outgoing uniformities of light backlight, also be provided with diffusion sheet 14 on a prismatic lens 10 and above the diffuser plate 13 usually.As shown in Figure 2, prismatic lens 10 comprises transparency carrier 101 and is formed at the layers of prisms 103 on the transparency carrier 101.Have a plurality of strip V-types protruding 105 on the layers of prisms 103.The strip V-type of prismatic lens 10 protruding 105 can make emergent ray that gathering to a certain degree takes place, thereby improves the brightness of module 100 backlight in the certain viewing angles scope.Last diffusion sheet 14 can be to doing further diffusion from the light of prismatic lens 10 outgoing.
Yet when light transmitted in prismatic lens 10 and last diffusion sheet 14, part light can be absorbed and cause light losing; And between prismatic lens 10 and last diffusion sheet 14, air layer is arranged, it can increase the number of interfaces of light in transmission course, increases the interface loss of light transmission, reduces light utilization.
Summary of the invention
In view of above-mentioned condition, be necessary to provide a kind of effective utilization rate of light, emitting uniform module backlight and diffuser plate thereof of improving.
A kind of diffuser plate, it is processed by the transparent bodies that is doped with diffusion particle.This transparent bodies comprises first surface and and this first surface opposing second surface.This first surface has a plurality of micro grooves, and these a plurality of micro grooves are triangular taper, and per six adjacent hexagrams of micro grooves formation with common tie point, and this second surface has a plurality of strip arc grooves that are parallel to each other; The radius of circular arc in the strip arc groove is designated as R; The center distance of adjacent strip arc groove 204 is designated as P; The depth capacity of each strip arc groove 204 is designated as H; Then R, P and H satisfy following relational expression: 0.025 millimeter≤P≤1.5 millimeters, and 0.01 millimeter≤R≤2P, 0.01 millimeter≤H≤R.
A kind of module backlight, it comprises framework, light source and diffuser plate, and this light source is positioned at this framework, and this diffuser plate is arranged at this light source top, and this diffuser plate is processed by the transparent bodies that is doped with diffusion particle.This transparent bodies comprises first surface and and this first surface opposing second surface.This first surface has a plurality of micro grooves, and these a plurality of micro grooves are triangular taper, and per six adjacent hexagrams of micro grooves formation with common tie point, and this second surface has a plurality of strip arc grooves that are parallel to each other; The radius of circular arc in the strip arc groove is designated as R; The center distance of adjacent strip arc groove 204 is designated as P; The depth capacity of each strip arc groove 204 is designated as H; Then R, P and H satisfy following relational expression: 0.025 millimeter≤P≤1.5 millimeters, and 0.01 millimeter≤R≤2P, 0.01 millimeter≤H≤R.
Diffusion particle in the above-mentioned diffuser plate can make the abundant scattering of the light of injecting in the diffuser plate; Inject light in the diffuser plate simultaneously under the synergy of the strip arc groove of the micro groove of first surface and second surface; Optical effects such as specific refraction, reflection and diffraction can take place; Make from the light of diffuser plate outgoing specific diffusion takes place, thereby improve the brightness in the certain viewing angles scope.Simultaneously, also can weaken even avoid the light source ghost, improve the light-emitting uniformity of module backlight, and then avoid adopting diffusion sheet and the interface loss that produces, promote light utilization.
Description of drawings
Fig. 1 is a kind of diagrammatic cross-section of existing module backlight.
Fig. 2 is the schematic perspective view of the diffuser plate of preferred embodiment one of the present invention.
Fig. 3 is the cut-open view along the III-III line of diffuser plate shown in Figure 2.
Fig. 4 is the light intensity test figure of diffuser plate shown in Figure 2.
Fig. 5 is the upward view of the diffuser plate of preferred embodiment two of the present invention.
Fig. 6 is the cut-open view of the diffuser plate of preferred embodiment three of the present invention.
Fig. 7 is the cut-open view of the module backlight of preferred embodiment of the present invention.
Embodiment
To combine accompanying drawing and embodiment that module backlight of the present invention and diffuser plate thereof are done further to specify below.
See also Fig. 2 to Fig. 3, be depicted as the diffuser plate 20 of preferred embodiment one of the present invention, it is processed by the transparent bodies that is doped with diffusion particle 205.This transparent bodies comprises first surface 201 and and first surface 201 opposing second surface 202.First surface 201 has a plurality of micro grooves 203, and second surface 202 has a plurality of strip arc grooves 204.
A plurality of micro grooves 203 of first surface 201 are regular array closely arranges, and these a plurality of micro grooves 203 are triangular taper, and per six adjacent micro grooves with common tie point 203 form a hexagram.A plurality of micro grooves 203 can be by a plurality of V-arrangement ridge structures, a plurality of V-arrangement ridge structure and a plurality of staggered surrounding of V-arrangement ridge structure of extending along third direction of extending along second direction of extending along first direction, and first, second and third direction angle each other is 120 degree.The drift angle of this V-arrangement ridge structure can be 50 degree to 120 degree, on first, second and third direction be equidirectional centre distance between the adjacent V-arrangement ridge structure can be 0.025 millimeter to 1 millimeter.The angle through adjusting this angle and the length breadth ratio of micro groove 203 can be adjusted the rate of adding lustre to and the bright dipping visual angle of diffuser plate 20.
Be parallel to each other between a plurality of strip arc grooves 204 of second surface 202.The vertical section of each strip arc groove 204 is a circular arc.The radius of circular arc in the strip arc groove 204 is designated as R; The center distance of adjacent strip arc groove 204 is designated as P; The depth capacity of each strip arc groove 204 is designated as H; Then R, P and H satisfy following relational expression: 0.025 millimeter≤P≤1.5 millimeters, and 0.01 millimeter≤R≤2P, 0.01 millimeter≤H≤R.Simultaneously; The bearing of trend of a plurality of strip arc grooves 204 of second surface 202 and one of them bearing of trend of above-mentioned V-arrangement ridge structure (first, second or third direction) intersect vertically; This design can prevent effectively that light from interfering phenomenon, thereby minimizing even elimination interference fringe are to improve the optical effect of module backlight.
The general thickness T of diffuser plate 20 can be 0.4 millimeter to 4 millimeters.Diffuser plate 20 can be formed by one or more the material doped diffusion particle 205 back injection mo(u)ldings in polymethylmethacrylate, polycarbonate, polystyrene, the styrene-methylmethacrylate copolymer.Diffusion particle 205 can be one or more the potpourri in titanium dioxide fine particles, silicon dioxide microparticle and the acryl resin particulate.Need in the preparation process on mould, to be provided with and micro groove 203 and strip arc groove 204 corresponding bulge-structures, so that make the diffuser plate 20 can moulding in the single injection process.
When diffuser plate 20 is used for module backlight; Diffusion particle 205 in the diffuser plate 20 can make the abundant scattering of the light of injecting in the diffuser plate 20; Inject light in the diffuser plate 20 simultaneously under the synergy of the micro groove of first surface 201 203 and the strip arc groove 204 of second surface 202; Optical effects such as specific refraction, reflection and diffraction can take place, and make from the light of diffuser plate 20 outgoing specific diffusion takes place, thereby improve the brightness in the certain viewing angles scope.Simultaneously, also can weaken even avoid the light source ghost, improve the light-emitting uniformity of module backlight, and then avoid adopting diffusion sheet and the interface loss that produces, promote light utilization.
See also Fig. 4, be separated into the light-emitting zone (density of diffusion particle 205 is big more, and then this polygonal shape is obvious more) of an approximate polygon from the light of diffuser plate 20 outgoing by a light source.The light-emitting zone of this approximate polygon is the effect that obtains through diffusion particle 205, micro groove 203 and strip arc groove 204 threes synergy.This shows, from the homogeneity of the light of diffuser plate 20 outgoing be improved significantly.Therefore when diffuser plate 20 is used in module backlight, can weaken even avoid the light source ghost and obtain emergent light uniformly, thereby omit the use of going up diffusion sheet, promote light utilization.
In addition, on the first surface 201 of diffuser plate 20, the common tie point of per six interconnective micro grooves 203 all is positioned on the rib with first surface 201 flush.Also form rib between per two strip arc grooves 204 of second surface 202 with second surface 202 flush.Be first, second surface no sharp point existence on 201,202 of diffuser plate 20, make diffuser plate 20 not fragile.And; Diffuser plate 20 is to adopt the mode of injection mo(u)lding one-body molded; Therefore other parts of micro groove 203 on it and strip arc groove 204 and diffuser plate 20 form together; Can make micro groove 203 and strip arc groove 204 have higher structural strength, can also promote the adhesion of micro groove 203 and strip arc groove 204 and diffuser plate 20 other parts simultaneously, thereby can avoid or reduce the in use impaired danger of diffuser plate 20.
See also Fig. 5, be depicted as the diffuser plate 30 of preferred embodiment two of the present invention, its diffuser plate 20 with embodiment one is similar, and second surface 302 has a plurality of strip arc grooves 304.Difference is: each strip arc groove 304 extends along sinusoidal curve.Because strip arc groove 304 extends along curve; When therefore diffuser plate 30 being used for liquid crystal indicator; The array of strip arc groove 304 can avoid with liquid crystal indicator in the equitant situation of array arrangement of liquid crystal panel pixel, thereby prevent the generation of diffraction fringe.
See also Fig. 6, be depicted as the diffuser plate 40 of preferred embodiment three of the present invention, its diffuser plate 20 with embodiment one is similar, and second surface 402 has a plurality of strip arc grooves 404.Difference is: the vertical section of the strip arc groove 404 of second surface 402 is an ellipse arc.The vertical section that is appreciated that this strip arc groove 404 also can be other arcs such as para-curve, sinusoidal curve.
Please be simultaneously referring to Fig. 2 and Fig. 7, the module backlight 200 of preferred embodiment of the present invention comprises diffuser plate 20, framework 21 and light source 22, and light source 22 is positioned at framework 21, and diffuser plate 20 is arranged at light source 22 tops.
In addition, those skilled in the art also can do other variation in spirit of the present invention.Certainly, these all should be included in the present invention's scope required for protection according to the variation that the present invention's spirit is done.
Claims (8)
1. diffuser plate; It is processed by the transparent bodies that is doped with diffusion particle; This transparent bodies comprises that first surface reaches and this first surface opposing second surface, and it is characterized in that: this first surface has a plurality of micro grooves, and these a plurality of micro grooves are triangular taper; And per six adjacent micro grooves with common tie point form a hexagram, and this second surface has a plurality of strip arc grooves that are parallel to each other; The radius of circular arc in the strip arc groove is designated as R; The center distance of adjacent strip arc groove 204 is designated as P; The depth capacity of each strip arc groove 204 is designated as H; Then R, P and H satisfy following relational expression: 0.025 millimeter≤P≤1.5 millimeters, and 0.01 millimeter≤R≤2P, 0.01 millimeter≤H≤R.
2. diffuser plate as claimed in claim 1; It is characterized in that: these a plurality of micro grooves are by a plurality of V-arrangement ridge structure, a plurality of V-arrangement ridge structure and a plurality of staggered surrounding of V-arrangement ridge structure of extending along third direction of extending along second direction of extending along first direction; And this first, second and third direction angle each other is 120 degree; The drift angle of this V-arrangement ridge structure be 50 degree to 120 degree, and the equidirectional center distance that this adjacent V-arrangement ridge structure is 0.025 millimeter to 1 millimeter.
3. diffuser plate as claimed in claim 2 is characterized in that: one of them bearing of trend of the V-arrangement ridge structure of the bearing of trend of these a plurality of strip arc grooves and this first, second and third direction intersects vertically.
4. diffuser plate as claimed in claim 1 is characterized in that: each strip arc groove extends along curve.
5. diffuser plate as claimed in claim 1; It is characterized in that: the thickness of this diffuser plate is 0.4 millimeter to 4 millimeters, this diffuser plate by one or more the material doped diffusion particle in polymethylmethacrylate, polycarbonate, polystyrene, the styrene-methylmethacrylate copolymer after injection mo(u)lding form.
6. diffuser plate as claimed in claim 5 is characterized in that: this diffusion particle is one or more the potpourri in titanium dioxide fine particles, silicon dioxide microparticle and the acryl resin particulate.
7. module backlight; It comprises framework, light source and diffuser plate, and this light source is positioned at this framework, and this diffuser plate is arranged at this light source top; This diffuser plate is processed by the transparent bodies that is doped with diffusion particle; This transparent bodies comprises that first surface reaches and this first surface opposing second surface, and it is characterized in that: the first surface of this transparent bodies has a plurality of micro grooves, and these a plurality of micro grooves are triangular taper; And per six adjacent micro grooves with common tie point form a hexagram, and this second surface has a plurality of strip arc grooves that are parallel to each other; The radius of circular arc in the strip arc groove is designated as R; The center distance of adjacent strip arc groove 204 is designated as P; The depth capacity of each strip arc groove 204 is designated as H; Then R, P and H satisfy following relational expression: 0.025 millimeter≤P≤1.5 millimeters, and 0.01 millimeter≤R≤2P, 0.01 millimeter≤H≤R.
8. module backlight as claimed in claim 7 is characterized in that: this light source is a plurality of light emitting diodes that are arranged in array.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103025471A CN101620283B (en) | 2008-07-04 | 2008-07-04 | Backlight module and diffusion plate thereof |
| US12/317,992 US8016446B2 (en) | 2008-07-04 | 2008-12-31 | Optical plate and backlight module using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103025471A CN101620283B (en) | 2008-07-04 | 2008-07-04 | Backlight module and diffusion plate thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101620283A CN101620283A (en) | 2010-01-06 |
| CN101620283B true CN101620283B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008103025471A Expired - Fee Related CN101620283B (en) | 2008-07-04 | 2008-07-04 | Backlight module and diffusion plate thereof |
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| Country | Link |
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| CN (1) | CN101620283B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886763B (en) * | 2010-07-26 | 2012-07-18 | 鸿富锦精密工业（深圳）有限公司 | LED area light source device |
| CN102466146B (en) * | 2010-11-09 | 2014-06-25 | 四川新力光源股份有限公司 | Impulse LED (light emitting diode) light-emitting device |
| WO2016143350A1 (en) * | 2015-03-12 | 2016-09-15 | 株式会社クラレ | Diffusion plate |
| CN105068161A (en) * | 2015-06-30 | 2015-11-18 | 欧普照明股份有限公司 | Optical element and lighting device |
| CN109270735B (en) * | 2018-10-25 | 2021-08-17 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN112394431A (en) * | 2019-08-13 | 2021-02-23 | 台炜有限公司 | High-penetration uniform light diffusion module |
| TW202232142A (en) | 2021-02-09 | 2022-08-16 | 暘旭光電股份有限公司 | A backlight module having optical film with inclined structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196583A (en) * | 2006-12-08 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Optical plate |
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2008
- 2008-07-04 CN CN2008103025471A patent/CN101620283B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196583A (en) * | 2006-12-08 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Optical plate |
Non-Patent Citations (1)
| Title |
|---|
| 附图1-6、8. |
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| CN101620283A (en) | 2010-01-06 |
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