CN103775970A - Diffuser plate, manufacturing method thereof and backlight module - Google Patents
Diffuser plate, manufacturing method thereof and backlight module Download PDFInfo
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- CN103775970A CN103775970A CN201210407700.3A CN201210407700A CN103775970A CN 103775970 A CN103775970 A CN 103775970A CN 201210407700 A CN201210407700 A CN 201210407700A CN 103775970 A CN103775970 A CN 103775970A
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Abstract
The embodiment of the invention provides a diffuser plate, a manufacturing method of the diffuser plate and a backlight module and relates to the field of liquid crystal display. The optic effect and the picture quality can be guaranteed under the condition that a mixed light distance is shortened and the number of light-emitting diodes is reduced. The diffuser plate comprises a substrate and at least one light-diffusing unit arranged on the substrate. Each light-diffusing unit comprises at least one microstructure. According to each light-diffusing unit, the light condensation capacity of the microstructure of the center portion of each light-diffusing unit is the weakest and the microstructures further from the center of each light-diffusing unit has stronger light condensation capacity.
Description
Technical field
The present invention relates to field of liquid crystal display, relate in particular to a kind of diffuser plate and manufacture method thereof, backlight module.
Background technology
Along with the extensive use of secondary Lens (lens), down straight aphototropism mode set becomes the focus that shows industry.In down straight aphototropism mode set, the LED of use (Light EmittingDiode, a light emitting diode) number is fewer, and cost is lower; Mixed light is apart from shorter, and the backlight module of making is thinner.
In down straight aphototropism mode set, the diffuser plate of main use is diffused diffuser plate at present, and there is even astigmatic unit on the surface of described diffuser plate.Backlight module is having in enough mixed light distances and LED number situation, can there is good optical appearance, but in order to reduce costs and to reduce backlight module thickness and shorten mixed light distance and reduce when LED number, will produce periphery shadow or lamp shadow problem, have a strong impact on the picture quality of display.
Summary of the invention
Embodiments of the invention provide a kind of diffuser plate and manufacture method thereof, backlight module, can shorten mixed light apart from and reduce by LED number in the situation that, guarantee optical effect and picture quality.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of diffuser plate, comprising: substrate and be arranged on described suprabasil at least one astigmatic unit, and described astigmatic unit comprises at least one micro-structural;
Wherein, for each described astigmatic unit, the light gathering of the micro-structural of the core of described astigmatic unit is the most weak, and the light gathering of the micro-structural from the core of described astigmatic unit away from is more stronger.
Preferably, described micro-structural has arcuation section; For each described astigmatic unit, from described substrate certain height place, the section tangent line of the micro-structural of the core of described astigmatic unit and the angle maximum of described substrate vertical direction, the section tangent line of micro-structural and the angle of described substrate vertical direction from light source center part corresponding to described astigmatic unit away from are more less; Described certain height is greater than 0 height that is less than described micro-structural.
Preferably, the spherical shape or the ellipsoid shape that are shaped as part of described micro-structural; Or, the cylindric or oval column that is shaped as part of described micro-structural.
A manufacture method for diffuser plate, comprising: use extruder by leaded light plastic grains heat fused; And in the time of extrusion shaping diffuser plate, use compression moulding roller to roll out the astigmatic unit of described diffuser plate; Wherein said plastic compression roller has the rag of the astigmatic unit that forms above-mentioned diffuser plate.
By according to the plastic cement diffuser plate melting described in the roll extrusion of astigmatic Unit Design.
A kind of backlight module, comprising: at least one light source and the diffuser plate that is arranged on described light source top;
Described diffuser plate comprises: substrate and be arranged on described suprabasil and described light source astigmatic unit one to one, and described astigmatic unit comprises at least one micro-structural; Wherein, for each described astigmatic unit, the light gathering of the micro-structural of the core of described astigmatic unit is the most weak, and the light gathering of the micro-structural from the core of described astigmatic unit away from is more stronger.
Preferably, described micro-structural has arcuation section; For each described astigmatic unit, from described substrate certain height place, the section tangent line of the micro-structural of the core of described astigmatic unit and the angle maximum of described substrate vertical direction, the section tangent line of micro-structural and the angle of described substrate vertical direction from light source center part corresponding to described astigmatic unit away from are more less; Described certain height is greater than 0 thickness that is less than described micro-structural.
Preferably, when the light source in described backlight module is spot light, the spherical shape or the ellipsoid shape that are shaped as part of described micro-structural.When light source in described backlight module is line source, the cylindric or oval column that is shaped as part of described micro-structural.Optionally, the spot light of described backlight module is LED spot light.
The diffuser plate that technique scheme provides and manufacture method thereof, backlight module, in the astigmatic unit on described diffuser plate, the light gathering of the micro-structural from described astigmatic unit center part away from is more stronger, along with discrete light unit center part is far away, the incident ray of described diffuser plate is more weak, and the light gathering of described astigmatic unit grow gradually, can converge better described incident ray, thereby by the incident ray even intensity of strength distribution inequality derive, solve in the situation that shortening mixed light distance and reducing by LED number, the periphery shadow or the lamp shadow problem that produce because of light intensity skewness, optical effect and the picture quality of display are guaranteed.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The plan structure schematic diagram of a kind of diffuser plate that Fig. 1 provides for the embodiment of the present invention;
The cross-sectional view of a kind of diffuser plate that Fig. 2 provides for the embodiment of the present invention;
The cross-sectional view of the another kind of diffuser plate that Fig. 3 provides for the embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.
The embodiment of the present invention provides a kind of diffuser plate, is applied in backlight module, and the light that the light source of described backlight module can be sent spreads out equably, for display provides brightness uniform light source.
The plan structure schematic diagram that is illustrated in figure 1 a kind of diffuser plate that the embodiment of the present invention provides, Fig. 2 is along the cross-sectional view in A-A Section line direction in Fig. 1.Described diffuser plate 1 comprises substrate 10 and is arranged at least one the astigmatic unit 11 in described substrate 10, and described astigmatic unit 11 comprises at least one micro-structural 110; Wherein, for each described astigmatic unit 11, the light gathering of the micro-structural 110 of the core of described astigmatic unit 11 is the most weak, and the light gathering of the micro-structural 110 from the core of described astigmatic unit 11 away from is more stronger.
From the law of refraction, for identical light transmissive material, to irradiate with identical incident light, the light gathering of the mild light transmissive material of the precipitous light transmissive material specific surface in surface is strong.As shown in Figure 2, irradiate with same incident light L0 astigmatic unit 11 core micro-structural and compared with the micro-structural of marginal portion, at sustained height place, the refracted ray that the micro-structural of core derives and the angle of described substrate 10 vertical direction are α, the refracted ray that the micro-structural of marginal portion derives and the angle of described substrate 10 vertical direction are β, α > β, the light gathering of the micro-structural of the mild core of the micro-structural specific surface of surperficial precipitous marginal portion is strong.
Preferably, as shown in Figure 2, described micro-structural 110 has arcuation section; For each described astigmatic unit 11, from described substrate 10 certain height places, the section tangent line of the micro-structural 110 of the core of described astigmatic unit 11 and the angle maximum of described substrate vertical direction, the section tangent line of micro-structural 110 and the angle of described substrate 10 vertical direction from described astigmatic unit center part away from are more less; Described certain height is greater than 0 thickness that is less than described micro-structural 110.
At sustained height place, in described astigmatic unit 11, the angle of the section tangent line of micro-structural and described substrate 10 vertical direction is less, the surface of described micro-structural is more precipitous, for example, shown in Fig. 2 from described substrate 10 certain height H places, the mild section tangent line L1 of micro-structural and the angle of described substrate vertical direction in surface of the core of described astigmatic unit 11 is λ, the precipitous section tangent line L2 of micro-structural and the angle of described substrate vertical direction in surface from the core of described astigmatic unit 11 away from is ε, wherein λ > ε.At sustained height place, the section tangent line of micro-structural 110 and the angle of described substrate 10 vertical direction from described astigmatic unit center part away from are more less, and from described astigmatic unit center part, the surface of the micro-structural 110 away from is more more precipitous, and its light gathering is stronger.
In order to reduce costs and to reduce backlight module thickness and shorten mixed light distance and reduce when LED number, on diffuser plate, the intensity of the incident ray of astigmatic unit center part is the strongest, and the incident ray intensity from described astigmatic unit center part away from is more more weak.The inhomogeneous incident ray of described intensity distributions is when through described astigmatic unit, in prior art on diffuser plate by identical micro-structural be uniformly distributed the astigmatic unit that forms will by incident ray inhomogeneous intensity distributions through same degree spread, still intensity derives unevenly, produce periphery shadow or lamp shadow problem, have a strong impact on the picture quality of display.And in the astigmatic unit providing in the embodiment of the present invention, because the light gathering of the micro-structural away from more from described astigmatic unit center part is stronger, therefore the strongest incident ray that described astigmatic unit can arrive its core farthest spreads derivation, along with discrete light unit center part is far away, the incident ray that arrives described astigmatic unit is more weak, the light gathering of described astigmatic unit grow gradually, can converge better described incident ray, thereby by the incident ray even intensity of strength distribution inequality derive, solve because deriving uneven periphery shadow or the lamp shadow problem producing of light intensity, optical effect and the picture quality of display are guaranteed.
Preferably, the shape of described micro-structural can be spherical shape or the ellipsoid shape of part as depicted in figs. 1 and 2.The micro-structural that is the central point part of astigmatic unit is mild part ball or ellipsoid of surperficial radian, and the surperficial radian of the micro-structural from the central point of described astigmatic unit away from is more more precipitous.The shape of described micro-structural also can be illustrated in figure 3 the cylindric or oval column of part.The micro-structural that is the center line part of astigmatic unit is mild part cylinder or cylindroid of surperficial radian, and the surperficial radian of the micro-structural from the center line of described astigmatic unit away from is more more precipitous.
The embodiment of the present invention also provides a kind of manufacture method of diffuser plate, and described method comprises: use extruder by leaded light plastic grains heat fused; And in the time of extrusion shaping diffuser plate, use compression moulding roller to roll out the astigmatic unit of described diffuser plate; On wherein said plastic compression roller, there is the rag of the astigmatic unit that forms above-mentioned diffuser plate.
In actual manufacture process, conventional leaded light plastic grains is Merlon (Polycarbonate is called for short PC) plastic grains and polystyrene (Polystyrene is called for short PS) plastic grains.Rag on described compression moulding roller can complete according to the astigmatic unit on the diffuser plate of design in advance.After described compression moulding roller rolls one week on described unfashioned diffuser plate, can on described unfashioned diffuser plate, form one or more complete astigmatic unit, concrete can design according to actual conditions.In the manufacturing process of the diffuser plate providing in the embodiment of the present invention, to carry out corresponding design to the size of compression moulding roller and rag, also to reasonably arrange according to actual conditions the size of its each roll extrusion and typesetting, avoid causing cost to increase and prolongation in man-hour.
The embodiment of the present invention also provides a kind of backlight module, comprising: at least one light source and the diffuser plate that is arranged on described light source top; As shown in Figure 1 or 2, described diffuser plate 1 comprises: substrate 10 and be arranged in described substrate 10 with described light source astigmatic unit 11 one to one, described astigmatic unit 11 comprises at least one micro-structural 110; Wherein, for each described astigmatic unit 11, the light gathering of the micro-structural 110 of the core of described astigmatic unit 11 is the most weak, and the light gathering of the micro-structural 110 from the core of described astigmatic unit 11 away from is more stronger.
Preferably, as shown in Figure 2, described micro-structural 110 has arcuation section; For each described astigmatic unit 11, from described substrate 10 certain height places, the section tangent line of the micro-structural 110 of the core of described astigmatic unit 11 and the angle maximum of described substrate vertical direction, the section tangent line of micro-structural 110 and the angle of described substrate 10 vertical direction from described astigmatic unit center part away from are more less; Described certain height is greater than 0 thickness that is less than described micro-structural 110.
In order to reduce costs and to reduce backlight module thickness and shorten mixed light distance and reduce when LED number, when the light that light source in backlight module sends arrives large diffuser plate, on described diffuser plate, the intensity of the incident ray of astigmatic unit center part is the strongest, and the incident ray intensity from described astigmatic unit center part away from is more more weak.The inhomogeneous incident ray of described intensity distributions is when through described astigmatic unit, in prior art on diffuser plate by identical micro-structural be uniformly distributed the astigmatic unit that forms will by incident ray inhomogeneous intensity distributions through same degree spread, still intensity derives unevenly, produce periphery shadow or lamp shadow problem, have a strong impact on the picture quality of display.And in the astigmatic unit providing in the embodiment of the present invention, because the light gathering of the micro-structural away from more from described astigmatic unit center part is stronger, therefore the strongest incident ray that described astigmatic unit can arrive its core farthest spreads derivation, along with discrete light cell mesh is far away, the incident ray that arrives described astigmatic unit is more weak, the light gathering of described astigmatic unit grow gradually, can converge better described incident ray, thereby by the incident ray even intensity of strength distribution inequality derive, solve because deriving uneven periphery shadow or the lamp shadow problem producing of light intensity, optical effect and the picture quality of display are guaranteed.
Optionally, light source in described backlight module can be spot light or line source, when described light source is spot light, and point centered by the core of the astigmatic unit corresponding with described spot light, preferably, the shape of described micro-structural is spherical shape or the ellipsoid shape of part as depicted in figs. 1 and 2.The micro-structure surface of described astigmatic unit center point part is the mildest, and the surface of the micro-structural from described astigmatic unit center point away from is more more precipitous, and light gathering is stronger.Optionally, described spot light is LED spot light.In the time that the light source in described backlight module is line source, line centered by the core of the astigmatic unit corresponding with described spot light, preferred, the shape of described micro-structural is illustrated in figure 3 the cylindric or oval column of part.The row micro-structure surface that described astigmatic unit center line is corresponding is the mildest, and the surface of the micro-structural from described astigmatic unit center line away from is more more precipitous, and light gathering is stronger.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a diffuser plate, is characterized in that, comprising: substrate and be arranged on described suprabasil at least one astigmatic unit, and described astigmatic unit comprises at least one micro-structural;
Wherein, for each described astigmatic unit, the light gathering of the micro-structural of the core of described astigmatic unit is the most weak, and the light gathering of the micro-structural from the core of described astigmatic unit away from is more stronger.
2. diffuser plate according to claim 1, is characterized in that, described micro-structural has arcuation section;
For each described astigmatic unit, from described substrate certain height place, the section tangent line of the micro-structural of the core of described astigmatic unit and the angle maximum of described substrate vertical direction, the section tangent line of micro-structural and the angle of described substrate vertical direction from light source center part corresponding to described astigmatic unit away from are more less; Described certain height is greater than 0 height that is less than described micro-structural.
3. diffuser plate according to claim 2, is characterized in that, the spherical shape or the ellipsoid shape that are shaped as part of described micro-structural.
4. diffuser plate according to claim 2, is characterized in that, the cylindric or oval column that is shaped as part of described micro-structural.
5. a manufacture method for diffuser plate, is characterized in that,
Use extruder by leaded light plastic grains heat fused; And in the time of extrusion shaping diffuser plate, use compression moulding roller to roll out the astigmatic unit of described diffuser plate; Wherein said plastic compression roller has the rag of the astigmatic unit of the diffuser plate described in formation claim 1～4 any one.
6. a backlight module, is characterized in that, comprising: at least one light source and the diffuser plate that is arranged on described light source top;
Described diffuser plate comprises: substrate and be arranged on described suprabasil and described light source astigmatic unit one to one, and described astigmatic unit comprises at least one micro-structural; Wherein, for each described astigmatic unit, the light gathering of the micro-structural of the core of described astigmatic unit is the most weak, and the light gathering of the micro-structural from the core of described astigmatic unit away from is more stronger.
7. backlight module according to claim 6, is characterized in that, described micro-structural has arcuation section;
For each described astigmatic unit, from described substrate certain height place, the section tangent line of the micro-structural of the core of described astigmatic unit and the angle maximum of described substrate vertical direction, the section tangent line of micro-structural and the angle of described substrate vertical direction from light source center part corresponding to described astigmatic unit away from are more less; Described certain height is greater than 0 thickness that is less than described micro-structural.
8. backlight module according to claim 7, is characterized in that, when the light source in described backlight module is spot light, and the spherical shape or the ellipsoid shape that are shaped as part of described micro-structural.
9. backlight module according to claim 8, is characterized in that, the spot light of described backlight module is LED spot light.
10. backlight module according to claim 7, is characterized in that, when the light source in described backlight module is line source, and the cylindric or oval column that is shaped as part of described micro-structural.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210407700.3A CN103775970A (en) | 2012-10-23 | 2012-10-23 | Diffuser plate, manufacturing method thereof and backlight module |
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| CN201210407700.3A CN103775970A (en) | 2012-10-23 | 2012-10-23 | Diffuser plate, manufacturing method thereof and backlight module |
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| CN103775970A true CN103775970A (en) | 2014-05-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188777A (en) * | 2018-10-31 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN113219666A (en) * | 2021-04-30 | 2021-08-06 | 歌尔股份有限公司 | Optical module and head-mounted display device |
| CN114779386A (en) * | 2022-04-02 | 2022-07-22 | 惠州华星光电显示有限公司 | Backlight module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050013001A1 (en) * | 2003-07-17 | 2005-01-20 | Industrial Technology Research Institute | Composite micro-structured sheet for diffusing and condensing light |
| CN1704813A (en) * | 2004-05-31 | 2005-12-07 | 颖台科技股份有限公司 | Diffuser of direct type backlight module and method for making same |
| CN1971315A (en) * | 2006-12-21 | 2007-05-30 | 友达光电股份有限公司 | Backlight module and diffusion board structure used thereby |
| CN101737707A (en) * | 2008-11-12 | 2010-06-16 | 苏州维旺科技有限公司 | Light diffusion sheet for back light module and manufacture method thereof |
| CN102147488A (en) * | 2011-03-11 | 2011-08-10 | 北京化工大学 | Diffusion plate of multilayered diffusion particle layer |
-
2012
- 2012-10-23 CN CN201210407700.3A patent/CN103775970A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050013001A1 (en) * | 2003-07-17 | 2005-01-20 | Industrial Technology Research Institute | Composite micro-structured sheet for diffusing and condensing light |
| CN1704813A (en) * | 2004-05-31 | 2005-12-07 | 颖台科技股份有限公司 | Diffuser of direct type backlight module and method for making same |
| CN1971315A (en) * | 2006-12-21 | 2007-05-30 | 友达光电股份有限公司 | Backlight module and diffusion board structure used thereby |
| CN101737707A (en) * | 2008-11-12 | 2010-06-16 | 苏州维旺科技有限公司 | Light diffusion sheet for back light module and manufacture method thereof |
| CN102147488A (en) * | 2011-03-11 | 2011-08-10 | 北京化工大学 | Diffusion plate of multilayered diffusion particle layer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188777A (en) * | 2018-10-31 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN113219666A (en) * | 2021-04-30 | 2021-08-06 | 歌尔股份有限公司 | Optical module and head-mounted display device |
| CN114779386A (en) * | 2022-04-02 | 2022-07-22 | 惠州华星光电显示有限公司 | Backlight module |
| CN114779386B (en) * | 2022-04-02 | 2023-11-28 | 惠州华星光电显示有限公司 | Backlight module |
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Application publication date: 20140507 |