CN101625434A - Backlight module and optical plate thereof - Google Patents
Backlight module and optical plate thereof Download PDFInfo
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- CN101625434A CN101625434A CN200810302648A CN200810302648A CN101625434A CN 101625434 A CN101625434 A CN 101625434A CN 200810302648 A CN200810302648 A CN 200810302648A CN 200810302648 A CN200810302648 A CN 200810302648A CN 101625434 A CN101625434 A CN 101625434A
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- strip
- optical sheet
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- parallel
- grooves
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Abstract
An optical plate comprises a transparent body which comprises a first surface and a second surface opposite to the first surface; wherein, the first surface is provided with a plurality of mutually parallel long strip arc grooves; the second surface is provided with a plurality of triangular pyramid shaped grooves and hexagonal pyramid shaped grooves; each triangular pyramid shaped groove is enclosed by three adjacent hexagonal pyramid shaped grooves. A backlight module has the advantages of improving effective utilization ratio of light and enjoying uniformity of light emission. The invention also provides the backlight module adopting the optical plate.
Description
Technical field
The present invention relates to a kind of module backlight and optical sheet thereof.
Background technology
See also Fig. 1, be depicted as a kind of existing down straight aphototropism mode set 100, it comprises framework 11 and the diffuser plate 13 that is arranged on a plurality of light sources 12 of these framework 11 inside and is arranged on light source 12 tops and covers framework 11.
During use, after entering diffuser plate 13, the light that is produced by a plurality of light sources 12 can be spread.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 from the diffusion of light source 12 light evenly make to be easy to generate the light source ghost from the light of diffuser plate 13 outgoing, 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 layers of prisms 103 on the transparency carrier 101.Have a plurality of strip V-type projectioies 105 on the layers of prisms 103.The strip V-type projection 105 of prismatic lens 10 can make emergent ray generation gathering to a certain degree, 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 optical sheet thereof of improving.
A kind of optical sheet, it is made of transparent bodies, and this transparent bodies comprises that first surface reaches and this first surface opposing second surface; The first surface of this transparent bodies has a plurality of strip arc grooves that are parallel to each other, the second surface of this transparent bodies has a plurality of triangular pyramid connected in stars and hexagonal pyramid connected in star, and wherein each triangular pyramid connected in star is surrounded by three adjacent hexagonal pyramid connected in stars.
A kind of module backlight, it comprises framework, light source and optical sheet, and this light source is positioned at this framework, and this optical sheet is arranged at this light source top, and this optical sheet is made of transparent bodies, and it comprises that first surface reaches and this first surface opposing second surface; The first surface of this transparent bodies has a plurality of strip arc grooves that are parallel to each other, the second surface of this transparent bodies has a plurality of triangular pyramid connected in stars and hexagonal pyramid connected in star, and wherein each triangular pyramid connected in star is surrounded by three adjacent hexagonal pyramid connected in stars.
Strip arc groove on the first surface of above-mentioned optical sheet can be adjusted the angle of incident light, can carry out the secondary light harvesting at second surface after making emergent light enter optical sheet; Second surface has by a plurality of triangular pyramid grooves and the interlaced curved-surface structure that changes that forms of a plurality of hexagonal pyramid groove, help allowing the light of injecting optical sheet that specific optical effects such as refraction, reflection and diffraction take place, and then can make from the light of optical sheet outgoing and assemble in a specific angular field of view, meanwhile, light is spread, to weaken even to avoid the light source ghost, improve the light-emitting uniformity of module backlight, avoid adopting the interface loss of going up diffusion sheet and producing, promoted light utilization.
Description of drawings
Fig. 1 is a kind of diagrammatic cross-section of existing module backlight.
Fig. 2 is the stereographic map of the prismatic lens of module backlight shown in Figure 1.
Fig. 3 is the schematic perspective view of optical sheet shown in the preferred embodiment of the present invention.
Fig. 4 is the cut-open view along the IV-IV line of optical sheet shown in Figure 3.
Fig. 5 is the light intensity test figure of optical sheet shown in Figure 3.
Fig. 6 is the synoptic diagram of the module backlight of preferred embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples module backlight of the present invention and optical sheet thereof are described in further detail.
See also Fig. 3 and Fig. 4, be depicted as the optical sheet 20 of preferred embodiment of the present invention, it is made of a transparent bodies, and transparent bodies comprises first surface 210 and and first surface 210 opposing second surface 220.First surface 210 has a plurality of strip arc grooves 212 that are parallel to each other.Second surface 220 has a plurality of triangular pyramid connected in stars 227 and a plurality of hexagonal pyramid connected in star 228, and wherein each triangular pyramid connected in star 227 surrounds by three adjacent hexagonal pyramid connected in stars 228.
A plurality of strip arc grooves 212 on the first surface 210 are the parallel lines array arrangement.Each strip arc groove 212 cross section vertically is a circular arc.Obviously, each strip arc groove 212 cross section vertically also can be ellipse arc.The radius of circular arc in the strip arc groove 212 is designated as R, and the center distance of adjacent strip arc groove 212 is designated as P
1, the depth capacity of each strip arc groove 212 is designated as H
1, then R, P
1And H
1Satisfy following relational expression: 0.025 millimeter≤P
1≤ 1.5 millimeters, P
1/ 4≤R≤2P
1, 0.01 millimeter≤H
1≤ R.In other words, the center distance P of adjacent two arc grooves 212
1Span be 0.025 millimeter to 1.5 millimeters, the span of radius R is 0.006 millimeter to 3 millimeters, depth H
1Span be 0.01 millimeter to 3 millimeters.A plurality of strip arc grooves 212 can be adjusted the angle of incident light, make the axial direction outgoing of incident ray near the first strip trapezoidal ridges structure on the second surface.
The a plurality of arc grooves 212 that are appreciated that first surface 210 extend along buckling curve, for example are concentric circles array arrangement and other parallel curves array arrangements, and also can reach approximate effect this moment.
A plurality of triangular pyramid connected in stars 227 on the second surface 220 and a plurality of hexagonal pyramid connected in star 228 are by a plurality of first strip trapezoidal ridges structures 222, a plurality of second strip trapezoidal ridges structure 224 and a plurality of the 3rd strip trapezoidal ridges structure 226 interlaced formation.Be parallel to each other respectively between a plurality of first strip trapezoidal ridges structures 222, between a plurality of second strip trapezoidal ridges structure 224 and between a plurality of the 3rd strip trapezoidal ridges structures 226.Wherein the bearing of trend of the strip arc groove 212 of first surface 210 is vertical mutually with the bearing of trend of the first strip trapezoidal ridges structure 222.In the first strip trapezoidal ridges structure 222, the second strip trapezoidal ridges structure 224 and the 3rd strip trapezoidal ridges structure 226 arbitrarily the angle of both bearing of trends be 120 degree.The center distance of adjacent two first strip trapezoidal ridges structures 222, adjacent two second strip trapezoidal ridges structures 224 and adjacent two the 3rd strip trapezoidal ridges structures 226 is designated as P
2, its span is 0.025 millimeter≤P2≤1 millimeter.The span of the angle theta of the two relative side of the first strip trapezoidal ridges structure 222, the second strip trapezoidal ridges structure 224 and the 3rd strip trapezoidal ridges structure 226 is that 50 degree are to 120 degree.In addition, need to prove, can raise the rate of adding lustre to and the bright dipping visual angle of whole optical sheet 20 in certain journey by adjusting the size of angle theta.
Be appreciated that a plurality of triangular pyramid connected in stars 227 and a plurality of hexagonal pyramid connected in star 228 on the second surface 220 also can be by a plurality of first strip V-arrangement ridge structures, a plurality of second strip V-arrangement ridge structure and interlaced formation of a plurality of the 3rd strip V-arrangement ridge structures.Wherein the bearing of trend of one of them of the bearing of trend of the strip arc groove 212 of first surface 210 and the first strip V-arrangement ridge structure, the second strip V-arrangement ridge structure, the 3rd strip V-arrangement ridge structure is vertical mutually.The drift angle of the first strip V-arrangement ridge structure, the second strip V-arrangement ridge structure and the 3rd strip V-arrangement ridge structure span be 50 the degree to 120 the degree.At this moment, diffuser plate 20 also can reach approximate diffusion effect, by adjusting the size of drift angle, also can raise the rate of adding lustre to and the bright dipping visual angle of whole optical sheet 20 in certain journey.
The span of the general thickness T of optical sheet 20 is 0.4 millimeter to 4 millimeters.Optical sheet 20 can be formed by one or more the material injection mo(u)lding in polymethylmethacrylate, polycarbonate, polystyrene, the styrene-methylmethacrylate copolymer.
For verifying that further optical sheet 20 can play specific diffusion to incident light rays, Fig. 5 shows pointolite through pointolite light intensity test figure after the optical sheet 20.As shown in Figure 5, the light from optical sheet 20 outgoing is a plurality of linear light sources by a pointolite scattering.This shows, can be significantly improved from the homogeneity of the light of optical sheet 20 outgoing.
See also Fig. 6, be depicted as the module backlight 200 of preferred embodiment of the present invention, it comprises above-mentioned optical sheet 20, framework 21 and light source 22, and light source 22 is positioned at framework 21, and optical sheet 20 is positioned at light source 22 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.
The bearing of trend of the strip arc groove 210 in the above-mentioned module backlight 200 on the bearing of trend of a plurality of cold-cathode fluorescence lamps and optical sheet 20 first surfaces 210 is identical, helps can carrying out the secondary light harvesting at second surface 212 after emergent light enters optical sheet 20; Simultaneously, the curved-surface structure that a plurality of triangular pyramid connected in stars 227 of second surface 220 and the 228 interlaced formation of a plurality of hexagonal pyramid connected in star change, thereby help allowing the light of injecting optical sheet 20 that specific optical effects such as refraction, reflection and diffraction take place, and then can make from the light of optical sheet 20 outgoing specific diffusion takes place, thereby form brightness wet look uniformly.This shows that above-mentioned module 200 backlight can weaken even avoid the light source ghost, improves the light-emitting uniformity of module backlight, avoided adopting the interface loss of going up diffusion sheet and producing, promote light utilization.Certainly, when light source 22 is pointolite, pointolite closely is arranged into array, can reaches the same good effect with line source.
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. optical sheet, it is made of transparent bodies, this transparent bodies comprises that first surface reaches and this first surface opposing second surface, it is characterized in that: the first surface of this transparent bodies has a plurality of strip arc grooves that are parallel to each other, the second surface of this transparent bodies has a plurality of triangular pyramid connected in stars and hexagonal pyramid connected in star, and wherein each triangular pyramid connected in star is surrounded by three adjacent hexagonal pyramid connected in stars.
2. optical sheet as claimed in claim 1, it is characterized in that: it is staggered that these a plurality of triangular pyramid grooves and these a plurality of hexagonal pyramid grooves are array respectively, it is by a plurality of first strip trapezoidal ridges structures that are parallel to each other, a plurality of second strip trapezoidal ridges structures that are parallel to each other and a plurality of the 3rd strip trapezoidal ridges structure that is parallel to each other are staggered to form, this first strip trapezoidal ridges structure, in the second strip trapezoidal ridges structure and the 3rd strip trapezoidal ridges structure arbitrarily the angle of cut of both bearing of trends be 120 degree, and the first strip trapezoidal ridges structure of the arc groove bearing of trend of this first surface and this second surface, the bearing of trend of one of them of the second strip trapezoidal ridges structure and the 3rd strip trapezoidal ridges structure is perpendicular.
3. optical sheet as claimed in claim 1, it is characterized in that: it is staggered that these a plurality of triangular pyramid grooves and these a plurality of hexagonal pyramid grooves are array respectively, it is by a plurality of first strip V-arrangement ridge structures that are parallel to each other, a plurality of second strip V-arrangement ridge structures that are parallel to each other and a plurality of the 3rd strip V-arrangement ridge structure that is parallel to each other are staggered to form, this first strip V-arrangement ridge structure, in the second strip V-arrangement ridge structure and the 3rd strip V-arrangement ridge structure arbitrarily the angle of cut of both bearing of trends be 120 degree, and the first strip V-arrangement ridge structure of the arc groove bearing of trend of this first surface and this second surface, the bearing of trend of one of them of the second strip V-arrangement ridge structure and the 3rd strip V-arrangement ridge structure is perpendicular.
4. optical sheet as claimed in claim 1 is characterized in that: a plurality of strip arc grooves of this first surface extend along buckling curve.
5. optical sheet as claimed in claim 1 is characterized in that: the OC span of adjacent two strip arc grooves is 0.025 millimeter to 1.5 millimeters, and the span of the degree of depth of strip arc groove is 0.01 millimeter to 3 millimeters.
6. optical sheet as claimed in claim 1 is characterized in that: the vertical section of each strip arc groove is a kind of in circular arc and the ellipse arc.
7. optical sheet as claimed in claim 1 is characterized in that: the material of this transparent bodies is one or more the potpourri in polymethylmethacrylate, polycarbonate, polystyrene, the styrene methyl methacrylate multipolymer.
8. module backlight, it comprises framework, light source and optical sheet, this light source is positioned at this framework, this optical sheet is arranged at this light source top, this optical sheet is made of transparent bodies, it comprises that first surface reaches and this first surface opposing second surface, it is characterized in that: the first surface of this transparent bodies has a plurality of strip arc grooves that are parallel to each other, the second surface of this transparent bodies has a plurality of triangular pyramid connected in stars and hexagonal pyramid connected in star, and wherein each triangular pyramid connected in star is surrounded by three adjacent hexagonal pyramid connected in stars.
9. module backlight as claimed in claim 8 is characterized in that: this light source is a plurality of line sources, and the bearing of trend of the strip arc groove on the bearing of trend of these a plurality of line sources and the first surface is identical.
10. module backlight as claimed in claim 8 is characterized in that: this light source is a pointolite, and closely is arranged into array.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810302648A CN101625434A (en) | 2008-07-08 | 2008-07-08 | Backlight module and optical plate thereof |
| US12/317,993 US8016472B2 (en) | 2008-07-08 | 2008-12-31 | Optical plate and backlight module using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810302648A CN101625434A (en) | 2008-07-08 | 2008-07-08 | Backlight module and optical plate thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101625434A true CN101625434A (en) | 2010-01-13 |
Family
ID=41521341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810302648A Pending CN101625434A (en) | 2008-07-08 | 2008-07-08 | Backlight module and optical plate thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101625434A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032738A (en) * | 2012-12-21 | 2013-04-10 | 江苏晶和金江照明有限公司 | LED (Light-Emitting Diode) lamp and lampshade |
| CN110296330A (en) * | 2019-07-08 | 2019-10-01 | 海盐金隆照明科技有限公司 | A kind of total reflection room lighting LED light |
| CN112526785A (en) * | 2019-09-19 | 2021-03-19 | 旸旭光电股份有限公司 | Optical film and backlight module |
| CN114019601A (en) * | 2022-01-06 | 2022-02-08 | 扬昕科技(苏州)有限公司 | Light collecting type light guide assembly and backlight module thereof |
-
2008
- 2008-07-08 CN CN200810302648A patent/CN101625434A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032738A (en) * | 2012-12-21 | 2013-04-10 | 江苏晶和金江照明有限公司 | LED (Light-Emitting Diode) lamp and lampshade |
| CN110296330A (en) * | 2019-07-08 | 2019-10-01 | 海盐金隆照明科技有限公司 | A kind of total reflection room lighting LED light |
| CN112526785A (en) * | 2019-09-19 | 2021-03-19 | 旸旭光电股份有限公司 | Optical film and backlight module |
| CN112526785B (en) * | 2019-09-19 | 2024-01-23 | 旸旭光电股份有限公司 | Optical film and backlight module |
| CN114019601A (en) * | 2022-01-06 | 2022-02-08 | 扬昕科技(苏州)有限公司 | Light collecting type light guide assembly and backlight module thereof |
| CN114019601B (en) * | 2022-01-06 | 2022-04-05 | 扬昕科技(苏州)有限公司 | Light collecting type light guide assembly and backlight module thereof |
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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: 20100113 |