CN101644405A - Direct backlight module - Google Patents
Direct backlight module Download PDFInfo
- Publication number
- CN101644405A CN101644405A CN200810303560A CN200810303560A CN101644405A CN 101644405 A CN101644405 A CN 101644405A CN 200810303560 A CN200810303560 A CN 200810303560A CN 200810303560 A CN200810303560 A CN 200810303560A CN 101644405 A CN101644405 A CN 101644405A
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- China
- Prior art keywords
- strip
- diffuser plate
- optical sheet
- strip arc
- mode set
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- Optical Elements Other Than Lenses (AREA)
Abstract
The invention relates to a direct backlight module which comprises a frame, a plurality of light-emitting diodes, a diffusion plate and an optical plate, wherein the light-emitting diodes are arrangedon a bottom plate of the frame, the diffusion plate is arranged above the light-emitting diodes, and the optical plate is arranged above the diffusion plate at intervals; scattering particles are dispersed in the diffusion plate, and the diffusion plate comprises a plurality of parallel long-strip arc-shaped grooves which are formed at a light entry surface and a plurality of parallel long-striparc-shaped heaves which are formed at a light exit surface; and the optical plate comprises a plurality of parallel long-strip arc-shaped grooves which are formed at a light entry surface and a plurality of parallel long-strip arc-shaped heaves which are formed on a light exit surface. The direct-lighting 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 existing module 100 backlight, it comprises 10, one reflecting plates 12 of framework, a plurality of LED (light emitting diode) spot light 14, a diffuser plate 16 and an a plurality of optical sheet 18.These a plurality of LED spot lights 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 spot light 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 particles.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 spot lights 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 aggtegation 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 spot light 14 but still is difficult to avoid the generation of spot light 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 spot light, 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 uniformity.
A kind of down straight aphototropism mode set, it comprises a framework, a plurality of light emitting diode, a diffuser plate and an optical sheet.A plurality of light emitting diodes are arranged on the base plate of this framework, and diffuser plate is arranged at this light emitting diode top, and optical sheet is disposed on the top of this diffuser plate.Be dispersed with scattering particles in the diffuser plate, and diffuser plate comprises a plurality of strip arc grooves that are parallel to each other that are formed at incidence surface and is formed at a plurality of strip camber projectioies that are parallel to each other of exiting surface.Optical sheet comprises a plurality of strip arc grooves that are parallel to each other that are formed at incidence surface and a plurality of strip arc convex that are parallel to each other that are formed at exiting surface.
The light that light emitting diode in the above-mentioned down straight aphototropism mode set is launched enters diffuser plate after spreading through the space, because the incidence surface of diffuser plate is formed with a plurality of strip arc grooves, exiting surface is formed with a plurality of strip arc convex, and be dispersed with scattering particles in this diffuser plate, it can diffuse into spot light area source and light is assembled in the certain viewing angles scope, promotes the front light emission rate and the light-emitting uniformity of module backlight; Then go into optical sheet through the space diffusion is laggard again from the light of diffuser plate outgoing, because the optical sheet incidence surface is formed with arc groove, exiting surface is formed with arc convex, make from the light of 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 area sourceization of light.Simultaneously, light self-luminous diode injects in the process that is incident to 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 generalized section of down straight aphototropism mode set.
Fig. 2 is the generalized section of the down straight aphototropism mode set of the embodiment of the invention one.
Fig. 3 is the stereogram of the diffuser plate of down straight aphototropism mode set shown in Figure 2.
Fig. 4 is the generalized section of diffuser plate shown in Figure 3 along the IV-IV direction.
Fig. 5 is the generalized section of diffuser plate shown in Figure 3 along the V-V direction.
Fig. 6 is the stereogram of optical sheet shown in Figure 3.
Fig. 7 is the generalized section along the VII-VII direction of optical sheet shown in Figure 3.
Fig. 8 is the stereogram of the optical sheet of the embodiment of the invention two.
The specific 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, diffuser plate 24, optical sheet 25 and a plurality of optical sheet 26.Wherein a plurality of light emitting diodes 23 are arranged at framework 21 bottoms, diffuser plate 24 and 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 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 to Fig. 5, be dispersed with scattering particles 240 in the diffuser plate 24.Diffuser plate 24 comprises incidence surface 241 and is formed at a plurality of strip arc grooves 242 that are parallel to each other of incidence surface 241, the exiting surface 243 relative with incidence surface 241 and be formed at a plurality of strip V-types projection 244 and strip arc convex 245 of alternately arranging and being parallel to each other of exiting surface 243.The bearing of trend of a plurality of strip V-type projectioies 244 and strip arc convex 245 and the bearing of trend of a plurality of strip arc grooves 242 intersect.In the present embodiment, the bearing of trend of a plurality of strip V-type projectioies 244 and strip arc convex 245 is vertical mutually with the bearing of trend of a plurality of strip arc grooves 242, the vertical cross-section of strip arc convex 244 is a semicircular arc, and the vertical cross-section of strip arc groove 242 is a semicircular arc.
The width of strip V-type projection 244 is designated as D
1, drift angle is designated as θ, highly is designated as H
1, D then
1, θ, H
1Satisfy following relational expression: 0.025 millimeter≤D
1≤ 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
1, radius is designated as R
1, highly be designated as H
2, L then
1, R
1, H
2Satisfy following relational expression: 0.025 millimeter≤L
1≤ 1.5 millimeters, L
1/ 4≤R
1≤ 2L
1, 0.01 millimeter≤H
2≤ R
1By regulating D
1, θ, H
1, L
1, R
1, and H
2Numerical value, can adjust the shape of strip V-type projection 244 and strip arc convex 245, thereby regulate the rate of adding lustre to and the bright dipping visual angle of diffuser plate 24.
The spacing of adjacent two strip arc grooves 242 is designated as P
1, radius is counted r
1, highly be designated as h
1, P then
1, r
1And h
1Satisfy following relational expression: 0.025 millimeter≤P
1≤ 1.5 millimeters, P
1/ 4≤r
1≤ 2P
1, 0.01 millimeter≤h
1≤ r
1By regulating P
1, r
1And h
1Numerical value, can adjust the surface curvature and the spacing of strip arc groove 242, thereby regulate diffusion effect 242 pairs of incident lights of a plurality of strip arc grooves.
The general thickness T of diffuser plate 24
1Can be 0.4 millimeter to 4 millimeters.Diffuser plate 24 can be formed by one or more the material doped scattering particles 240 back injection mo(u)ldings in polymethyl methacrylate, Merlon, polystyrene, the styrene methyl methacrylate copolymer.Scattering particles 240 can be one or more the mixture in titanium dioxide fine particles, silicon dioxide microparticle and the acrylic resin particulate.Need in the preparation process at the strip arc groove 242 corresponding bulge-structures and projection 244 of the strip V-type on the exiting surface 243 and the protruding 245 corresponding sunk structures of strip camber that are provided with on the mould with incidence surface 241, so that make the diffuser plate 24 can moulding in the single injection process.Being appreciated that by adjusting the transmitance that scattering particles 240 and the ratio between the material that constitutes diffuser plate 24 bodies can be regulated diffuser plate 24, is preferable selection but the light transmittance of diffuser plate 24 is controlled at more than 80%.
See also Fig. 6 and Fig. 7, optical sheet 25 is made of a transparent bodies, a plurality of strip arc grooves 252 that it comprises incidence surface 251 and is formed at incidence surface 251, the exiting surface 253 relative and be formed at a plurality of strip arc convex 254 of exiting surface 253 with incidence surface 251.The axial direction that the bearing of trend of a plurality of strip arc convex 254 on the exiting surface 253 and light emitting diode are arranged is parallel, and the bearing of trend quadrature of a plurality of strip arc grooves 252 on itself and the incidence surface 251.The bearing of trend that is appreciated that the bearing of trend of a plurality of strip arc convex 254 on the exiting surface 253 and a plurality of strip grooves 252 on the incidence surface 251 intersects also can reach approximate effect.
Be parallel to each other between a plurality of strip arc grooves 252 of incidence surface 251.The vertical section of each strip arc groove 252 is a circular arc.The radius of circular arc in the strip arc groove 252 is designated as r
2, the center distance of adjacent strip arc groove 252 is designated as P
2, the depth capacity of each strip arc groove 252 is designated as h
2, r then
2, P
2And h
2Satisfy following relational expression: 0.025mm≤P
2≤ 1.5mm, P
2/ 4≤r
2≤ 2P
2, 0.01mm≤h
2≤ r
2, promptly as the center distance P between the adjacent two strip arc grooves 252
2During for 275um, the radius r of each strip arc groove 252
2Be 137.5um, the depth capacity h of each strip arc groove 252
2Be 110um.
Be parallel to each other between a plurality of strip arc convex 254 of exiting surface 253.The vertical section of each strip arc convex 254 is a circular arc.The radius of circular arc in the strip arc convex 254 is designated as R
2, the center distance of adjacent strip arc convex 254 is designated as L
2, the depth capacity of each strip arc convex 254 is designated as H
3, R then
2, L
2And H
3Satisfy following relational expression: 0.025mm≤L
2≤ 1.5mm, L
2/ 4≤R
2≤ 2L
2, 0.01mm≤H
3≤ R
2Same, the center distance L between adjacent two strip arc convex 254
2During for 275um, the radius R of each strip arc convex 254
2Be 137.5um, the depth capacity H of each strip arc convex 254
3Be 110um.
The general thickness T of optical sheet 25
2Can be 0.4 millimeter to 4 millimeters.Optical sheet 25 can be formed by one or more the material injection mo(u)lding in polymethyl methacrylate, Merlon, polystyrene, the styrene methyl methacrylate copolymer.Need on mould, to be provided with and strip arc convex 254 corresponding sunk structures in preparation optical sheet 25 processes, and with strip arc groove 252 corresponding bulge-structures so that make the optical sheet 25 can moulding in the single injection process.
A plurality of optical sheets 26 can be diffusion sheet, brightening piece or reflecting polarized wafer.
In the present embodiment module 200 backlight, diffuser plate 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 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, and diffuser plate 24 can be provided with smallerly with optical sheet 25 distance at interval, when the negligible amounts of light emitting diode 23, the degree of depth of framework 21 is bigger, and diffuser plate 24 correspondingly is provided with more greatly with optical sheet 25 distance at interval.
During use, the light that light emitting diode 23 is launched enters diffuser plate 24 after through first space, 27 diffusions, because the incidence surface of diffuser plate 24 is formed with the strip arc groove 242 that is parallel to each other, exiting surface 243 is formed with the inclined surface structure of the strip V-type projection 244 of specific configuration and strip arc convex 245 and is distributed in diffuser plate 24 intrinsic scattering particles 240, make light that specific refraction take place in diffuser plate 24, scattering, reflection and optical effect such as diffraction assemble light when light is diffused into the bigger area source of a plurality of areas in the certain viewing angles scope; These are a plurality of to be diffused into the larger area area source and enters second optics after through 28 diffusions of second space and pull 25, because the incidence surface 251 of optical sheet 25 is formed with a plurality of strip arc grooves 252,253 one-tenth inclined surface structures that a plurality of strip arc convex 254 are arranged of exiting surface shape, when making these a plurality of area sources that spread further diffuse into more large-area area source that the light diffusion is even, thus homogeneous light emitting area formed in the exiting surface of module 200 backlight.
A plurality of optical sheets 26 are covered on the 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 the diffuser plate 24 of the module backlight 200 of the embodiment of the invention one and the interval of optical sheet 25 are provided with, make light obtain preferable space diffusion, help reducing the degree of depth of framework 21; The surface texture that diffuser plate 24 and optical sheet 25 exiting surfaces are special and be distributed in diffuser plate 24 intrinsic scattering particles 240, make light that specific refraction take place, scattering, optical effects such as reflection and diffraction, thereby with twice area sourceization of light and diffusion and in the certain viewing angles scope, assemble, thereby the exiting surface in module 200 backlight forms the even brightness wet look, diffuser plate 24 and the optical sheet 25 mutual collocation in module 200 backlight like this, just can weaken even avoid the light source ghost, improve the light-emitting uniformity of module 200 backlight, can realize the slimming design of module 200 backlight simultaneously.
See also Fig. 8, be depicted as the optical sheet 35 of the embodiment of the invention two, optical sheet 35 is similar to the optical sheet 25 of embodiment one, its difference is: optical sheet 35 comprises a plurality of strip arc convex 354 that are parallel to each other and a plurality of strip V-type projection 355 that is parallel to each other that is formed at exiting surface 353, and these a plurality of strip arc convex that are parallel to each other 354 intersect with a plurality of strip V-type projectioies 355 that are parallel to each other, thereby strip arc convex 354 is divided into a plurality of semi-cylindrical projectioies, and comprise a plurality of strip arc grooves 352 that are parallel to each other that are formed at incidence surface 351, and rectangular arc groove 352 is identical with strip arc convex 354 bearing of trends on the exiting surface 353.In the present embodiment, the bearing of trend of these a plurality of strip V-type projectioies 355 or strip arc convex 355 is vertical mutually with the bearing of trend of a plurality of strip arc grooves 352; The vertical cross-section of this strip arc convex 354 is a semicircular arc, and the vertical cross-section of this strip arc groove 352 is a semicircular arc.Be appreciated that the strip arc convex 354 and the vertical cross-section of strip arc groove 352 also can be ellipse arc.Certainly, the surface texture shape of the optical sheet 35 of embodiment two also can adopt the surface texture shape of the diffuser plate 24 among the embodiment 1.
The surface texture that is appreciated that the surface texture of exiting surface of the diffuser plate in the down straight aphototropism mode set of the present invention and optical sheet exiting surface can be identical.In addition, diffuser plate can be arranged at the position of optical sheet, and optical sheet can be arranged at the position of diffuser plate, and can be dispersed with scattering particles in optical sheet.
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 a framework, a plurality of light emitting diodes, a diffuser plate and an optical sheet, these a plurality of light emitting diodes are arranged on the base plate of this framework, this diffuser plate is positioned at this light emitting diode top, this optical sheet is disposed on the top of this diffuser plate, this diffuser plate comprises incidence surface and the exiting surface relative with this incidence surface, this optical sheet comprises a transparent bodies, this transparent bodies comprises incidence surface and the exiting surface relative with this incidence surface, it is characterized in that: be dispersed with scattering particles in this diffuser plate, and this diffuser plate further comprises a plurality of strip arc grooves that are parallel to each other that are formed at this diffuser plate incidence surface and is formed at a plurality of strip camber projectioies that are parallel to each other of this diffuser plate exiting surface; This optical sheet further comprises a plurality of strip arc grooves that are parallel to each other that are formed at this optical sheet incidence surface and a plurality of strip arc convex that are parallel to each other that are formed at this optical sheet exiting surface.
2. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: this diffuser plate further comprises a plurality of strip V-type projectioies that are parallel to each other that are formed at this diffuser plate exiting surface, and these a plurality of strip V-type projectioies are arranged alternately mutually with a plurality of strip arc convex.
3. down straight aphototropism mode set as claimed in claim 2 is characterized in that: this diffuser plate further comprises a plurality of strip V-type projectioies that are parallel to each other that are formed at this diffuser plate exiting surface, and these a plurality of strip V-type projectioies intersect with a plurality of strip arc convex.
4. down straight aphototropism mode set as claimed in claim 1 is characterized in that: the bearing of trend of bearing of trend and the strip arc convex that is formed at the diffuser plate exiting surface that is formed at the strip arc groove of this diffuser plate incidence surface intersects.
5. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: this optical sheet further comprises a plurality of strip V-type projectioies that are parallel to each other that are formed at this optical sheet exiting surface, and these a plurality of strip V-type projectioies are arranged alternately mutually with a plurality of strip arc convex.
6. down straight aphototropism mode set as claimed in claim 1 is characterized in that: this optical sheet further comprises a plurality of strip V-type projectioies that are formed at this optical sheet exiting surface, and these a plurality of strip V-type projectioies intersect with a plurality of strip arc convex.
7. down straight aphototropism mode set as claimed in claim 1 is characterized in that: the bearing of trend of bearing of trend and the strip arc convex that is formed at this optical sheet exiting surface that is formed at the strip arc groove of optical sheet incidence surface intersects.
8. down straight aphototropism mode set as claimed in claim 1 is characterized in that: this diffuser plate is arranged at the middle part of framework, and this 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: this optical sheet top is provided with a plurality of optical sheets.
10. down straight aphototropism mode set as claimed in claim 1 is characterized in that: be dispersed with scattering particles in this optical sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810303560A CN101644405A (en) | 2008-08-06 | 2008-08-06 | Direct backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810303560A CN101644405A (en) | 2008-08-06 | 2008-08-06 | Direct backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101644405A true CN101644405A (en) | 2010-02-10 |
Family
ID=41656401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810303560A Pending CN101644405A (en) | 2008-08-06 | 2008-08-06 | Direct backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101644405A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270725A (en) * | 2010-06-01 | 2011-12-07 | 展晶科技(深圳)有限公司 | Light emitting diode packaging structure |
| CN104965350A (en) * | 2015-07-27 | 2015-10-07 | 苏州固特斯电子科技有限公司 | Novel liquid crystal display module |
| CN109764285A (en) * | 2019-03-29 | 2019-05-17 | 杭州涂鸦信息技术有限公司 | Intelligent searchlight |
-
2008
- 2008-08-06 CN CN200810303560A patent/CN101644405A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102270725A (en) * | 2010-06-01 | 2011-12-07 | 展晶科技(深圳)有限公司 | Light emitting diode packaging structure |
| CN104965350A (en) * | 2015-07-27 | 2015-10-07 | 苏州固特斯电子科技有限公司 | Novel liquid crystal display module |
| CN109764285A (en) * | 2019-03-29 | 2019-05-17 | 杭州涂鸦信息技术有限公司 | Intelligent searchlight |
| CN109764285B (en) * | 2019-03-29 | 2023-10-24 | 杭州涂鸦信息技术有限公司 | Intelligent searchlight |
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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: 20100210 |