CN101650494A - Backlight module and optical plate thereof - Google Patents
Backlight module and optical plate thereof Download PDFInfo
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- CN101650494A CN101650494A CN200810303870A CN200810303870A CN101650494A CN 101650494 A CN101650494 A CN 101650494A CN 200810303870 A CN200810303870 A CN 200810303870A CN 200810303870 A CN200810303870 A CN 200810303870A CN 101650494 A CN101650494 A CN 101650494A
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- optical sheet
- strip
- light source
- light
- arc convex
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Abstract
The invention provides a backlight module comprising a frame, a light source and an optical plate; the light source is arranged in the frame; the optical plate is arranged above the light source; theoptical plate is made of transparent material, comprises a first surface and a second surface opposite to the first surface, and also comprises a plurality of strip V-shaped bulges and a plurality ofstrip arc budges formed on the first surface as well as a plurality of spherical grooves formed on the second surface; and the strip V-shaped bulges and the strip arc budges formed on the first surface are arranged alternately in parallel; the invention also provides an optical plate applied by the backlight module; the backlight module has the advantage of improving effective light utilization rate and uniformity of light emission.
Description
Technical field
The present invention relates to a kind of module backlight and optical sheet thereof, relate in particular to a kind of module backlight and optical sheet thereof that is used for liquid crystal display.
Background technology
See also Fig. 1, be depicted as a kind of 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.Please consult Fig. 2 simultaneously, 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 module backlight, it comprises framework, light source and optical sheet, this light source is positioned at this framework, this optical sheet is positioned at this light source top, this optical sheet is made of transparent material, it comprises that first surface reaches and this first surface opposing second surface, this optical sheet also comprises a plurality of strip V-arrangement projectioies and a plurality of strip arc convex that are formed at first surface, and a plurality of spherical grooves that are formed at second surface, a plurality of strip V-arrangement projectioies and a plurality of strip arc convex on this first surface are alternately arranged and are parallel to each other.
A kind of optical sheet is made of transparent material, and it comprises first surface, with this first surface opposing second surface, and a plurality of strip V-arrangement projection and strip arc convex that are formed at first surface, and a plurality of spherical grooves that are formed at second surface.A plurality of strip V-arrangement projectioies and a plurality of strip arc convex on this first surface are alternately arranged and are parallel to each other.
Optical sheet in the above-mentioned module backlight makes the light that enters in the optical sheet carry out to a certain degree diffusion owing to be formed with a plurality of spherical grooves on second surface, and on first surface, be formed with the strip V-arrangement projection and the strip arc convex of alternately arranging, but correlation goes out the light of optical sheet, and specific optical effects such as refraction, reflection and diffraction take place, so that emergent ray further diffusion takes place and assemble, thereby form brightness than uniform surface light source in specific angular field of view.Therefore, adopt the module backlight of this optical sheet to need not to use diffusion sheet, thereby avoid interface loss, promote light utilization because of adopting diffusion sheet to produce.
Description of drawings
Fig. 1 is a kind of diagrammatic cross-section of 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 embodiment of the invention one.
Fig. 4 is the schematic perspective view at another visual angle of optical sheet shown in Figure 3.
Fig. 5 is the cut-open view along the V-V line of optical sheet shown in Figure 3.
Fig. 6 is the cut-open view along the VI-VI line of optical sheet shown in Figure 3.
Fig. 7 is the light intensity test figure of specimen 1.
Fig. 8 is the light intensity test figure of specimen 2.
Fig. 9 is the light intensity test figure of specimen 3.
Figure 10 is the diagrammatic cross-section of the optical sheet of the embodiment of the invention two.
Figure 11 is the upward view of the optical sheet of the embodiment of the invention three.
Figure 12 is the upward view of the optical sheet of the embodiment of the invention four.
Figure 13 is the synoptic diagram of the module backlight of the embodiment of the invention five.
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 to Fig. 6, the optical sheet of the embodiment of the invention 1 20 is made of transparent material, this optical sheet 20 comprise first surface 201 and with first surface 201 opposing second surface 202.First surface 201 is formed with a plurality of strip V-arrangement projection 203 and strip arc convex 205 of alternately arranging and being parallel to each other.Second surface 202 is formed with a plurality of spherical grooves 206.In the present embodiment, the vertical cross-section profile of this strip arc convex 205 is a semicircular arc.
The width of strip V-arrangement projection 203 is designated as D, and drift angle is designated as θ, highly is designated as H1; Then D, θ, H
1Satisfy following relational expression: 0.025 millimeter≤D≤1 millimeter, 80 degree≤θ≤100 degree, 0.01 millimeter≤H
1≤ 3 millimeters.The width of strip arc convex 205 is designated as L, and radius is designated as R, highly is designated as H
2, then L, R, H
2Satisfy following relational expression: 0.025 millimeter≤L≤1.5 millimeters, L/4≤R≤2L, 0.01 millimeter≤H
2≤ R.By regulating D, θ, H
1, L, R and H
2Numerical value, can adjust the shape of strip V-arrangement projection 203 and strip arc convex 205, thereby regulate the rate of adding lustre to and the bright dipping visual angle of optical sheet 20.
A plurality of spherical grooves 206 rectangular array arrangements of first surface 201.The radius of sphere in the spherical groove 206 is designated as r, the center distance of adjacent two spherical grooves 206 is designated as d, and the degree of depth of spherical groove 206 is designated as h, and then r, d and h satisfy following relational expression: 0.01 millimeter≤r≤3 millimeters, 0.025 millimeter≤d≤1.5 millimeter, 0.01 millimeter≤h≤3 millimeters.By regulating the numerical value of d, r and h, can adjust the surface curvature and the spacing of spherical groove 206, thereby regulate the diffusion effect of 206 pairs of incident lights of a plurality of spherical grooves.
The general thickness of optical sheet 20 can be 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 methyl methacrylate multipolymer.Need in the preparation process on mould, to be provided with and strip V-arrangement projection 203 and strip arc convex 205 corresponding sunk structures, and with the corresponding projective structure of spherical groove 206 so that make the optical sheet 20 can moulding in the single injection process.
For verifying that further optical sheet 20 can play specific diffusion to incident light rays, choose especially as the listed sample of table 1 and compare test, its result such as Fig. 7 are to shown in Figure 9.
Table 1 specimen
| Sample number | Sample is formed |
| ??1 | Light emitting diode |
| ??2 | Light emitting diode+ |
| ??3 | Light emitting diode+ |
Analysis chart 7, Fig. 8 and result shown in Figure 9 as can be known, the light that light emitting diode sends is a bright spot that center intensity is higher; The light of outgoing can form two bright spots that center intensity is higher from prismatic lens 10; From the light of optical sheet 20 outgoing then diffuse into central intensity higher be roughly oval-shaped light-emitting zone.This shows that optical sheet 20 possesses the advantage that pointolite directly is converted to area source.
See also Figure 10, the optical sheet 30 of the embodiment of the invention two has similar structure to the optical sheet 20 of embodiment one, and its difference is: the vertical cross-section profile of the strip arc convex 305 on the first surface 301 is an ellipse arc.Certainly, but the vertical cross-section profile of strip arc convex 305 other smooth curve shape also.
Be appreciated that the spherical groove 206 on the second surface 202 also can be arranged as other forms, for example, but spherical groove 206 random arrangement, but for making emitting brightness comparatively even, the quantity of the spherical groove 206 in the unit area should keep about equally.And, see also Figure 11 and Figure 12, for further improving the whole homogeneity of optical sheet bright dipping, spherical groove 406 on the second surface 402 of the optical sheet 40 of the embodiment of the invention three can be the array-like interleaved arranges, and it is closely staggered that the spherical groove 506 on the second surface 502 of the optical sheet 50 of the embodiment of the invention four can be array-like.
Please consult Fig. 3, Fig. 4 and Figure 13 simultaneously, the module backlight 200 of the embodiment of the invention five comprises optical sheet 20, framework 21 and light source 22, and this light source 22 is positioned at this framework 21, and this optical sheet 20 is positioned at these light source 22 tops and covers framework 21.
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.
Light source 22 can be line source or pointolite, and for example cold-cathode fluorescence lamp and light emitting diode be a plurality of light emitting diodes in the present embodiment, and these a plurality of light emitting diodes closely are arranged into array.
The second surface 202 of the optical sheet 20 in the above-mentioned module backlight 200 near light sources and first surface 201 away from light source 22.Because a plurality of spherical grooves 206 rectangular array arrangements on the first surface 201, thereby help allowing the light of injecting optical sheet 20 that to a certain degree diffusion takes place, the strip V-arrangement of alternately arranging on first surface 201 projection 203 and strip arc convex 205 then, specific optical effects such as refraction, reflection and diffraction take place in the light that correlation goes out optical sheet 20, so that emergent ray further diffusion takes place and assemble, thereby form brightness than uniform surface light source in specific angular field of view.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 that has module employing diffusion sheet backlight now and produce, promote light utilization.
Be appreciated that when the spacing between the light source 22 is big, can between the optical sheet 20 of module 200 backlight of the present invention and light source 22, set up a diffuser plate, thereby can further evenly promote the light-emitting uniformity of entire aphototropism mould the light diffusion.
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. module backlight, it comprises framework, light source and optical sheet, this light source is positioned at this framework, this optical sheet is positioned at this light source top, this optical sheet is made of transparent material, it comprises that first surface reaches and this first surface opposing second surface, it is characterized in that: this optical sheet also comprises a plurality of strip V-arrangement projectioies and a plurality of strip arc convex that are formed at first surface, and a plurality of spherical grooves that are formed at second surface, a plurality of strip V-arrangement projectioies and a plurality of strip arc convex on this first surface are alternately arranged and are parallel to each other.
2. module backlight as claimed in claim 1 is characterized in that: this module backlight further comprises a diffuser plate, and this diffuser plate is arranged between this light source and this optical sheet.
3. module backlight as claimed in claim 1 is characterized in that: this light source is a pointolite, and closely is arranged into array.
4. module backlight as claimed in claim 1 is characterized in that: these a plurality of spherical grooves are array-like and distribute.
5. module backlight as claimed in claim 1 is characterized in that: the vertical cross-section profile of this strip arc convex is circular arc or ellipse arc.
6. optical sheet, it is made of transparent material, this optical sheet comprises that first surface reaches and this first surface opposing second surface, it is characterized in that: this optical sheet also comprises a plurality of strip V-arrangement projectioies and a plurality of strip arc convex that are formed at first surface, and a plurality of spherical grooves that are formed at second surface, a plurality of strip V-arrangement projectioies and a plurality of strip arc convex on this first surface are alternately arranged and are parallel to each other.
7. optical sheet as claimed in claim 6 is characterized in that: the vertical cross-section profile of this strip arc convex is circular arc or ellipse arc.
8. optical sheet as claimed in claim 6 is characterized in that: the drift angle of this strip V-arrangement projection is that 80 degree are to 100 degree.
9. optical sheet as claimed in claim 6 is characterized in that: these a plurality of spherical grooves are array-like and distribute.
10. optical sheet as claimed in claim 6 is characterized in that: this optical sheet is formed by one or more the material injection mo(u)lding in polymethylmethacrylate, polycarbonate, polystyrene, the styrene-methylmethacrylate copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810303870A CN101650494A (en) | 2008-08-15 | 2008-08-15 | Backlight module and optical plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810303870A CN101650494A (en) | 2008-08-15 | 2008-08-15 | Backlight module and optical plate thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101650494A true CN101650494A (en) | 2010-02-17 |
Family
ID=41672760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810303870A Pending CN101650494A (en) | 2008-08-15 | 2008-08-15 | Backlight module and optical plate thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101650494A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185904A (en) * | 2011-12-29 | 2013-07-03 | 鸿富锦精密工业（深圳）有限公司 | Optical film, molding device thereof and molding method thereof |
| CN108873154A (en) * | 2018-08-10 | 2018-11-23 | 江苏达伦电子股份有限公司 | A kind of the network point distribution design method and light guide plate of light guide plate |
| CN109001937A (en) * | 2018-01-23 | 2018-12-14 | 苏州东山新材料科技有限公司 | A kind of economical direct type backlight assembly |
| CN109270730A (en) * | 2018-08-15 | 2019-01-25 | 住华科技股份有限公司 | Optical film, display device and manufacturing method thereof |
-
2008
- 2008-08-15 CN CN200810303870A patent/CN101650494A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185904A (en) * | 2011-12-29 | 2013-07-03 | 鸿富锦精密工业（深圳）有限公司 | Optical film, molding device thereof and molding method thereof |
| CN103185904B (en) * | 2011-12-29 | 2016-03-02 | 鸿富锦精密工业（深圳）有限公司 | Blooming and shaped device thereof and forming method |
| CN109001937A (en) * | 2018-01-23 | 2018-12-14 | 苏州东山新材料科技有限公司 | A kind of economical direct type backlight assembly |
| CN108873154A (en) * | 2018-08-10 | 2018-11-23 | 江苏达伦电子股份有限公司 | A kind of the network point distribution design method and light guide plate of light guide plate |
| CN109270730A (en) * | 2018-08-15 | 2019-01-25 | 住华科技股份有限公司 | Optical film, display device and manufacturing method thereof |
| CN109270730B (en) * | 2018-08-15 | 2022-03-25 | 住华科技股份有限公司 | Optical film, display device and manufacturing method thereof |
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| 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: 20100217 |