CN102767786B - Diffusion plate with dot-matrix diffusion structures and backlight module utilizing same - Google Patents
Diffusion plate with dot-matrix diffusion structures and backlight module utilizing same Download PDFInfo
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- CN102767786B CN102767786B CN201210257025.0A CN201210257025A CN102767786B CN 102767786 B CN102767786 B CN 102767786B CN 201210257025 A CN201210257025 A CN 201210257025A CN 102767786 B CN102767786 B CN 102767786B
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Abstract
The invention discloses a diffusion plate with dot-matrix diffusion structures. The dot-matrix diffusion structures are arranged on an out-light surface or an in-light surface of the diffusion plate, and centers of the diffusion structures correspond to light source centers of backlight sources one by one. The diffusion structures include two structures: the first structure includes that the center area of the first diffusion structure is a circular disc, hollow spots arranged in concentric circles are arranged on the circular disc, solid spots arranged in concentric circles are arranged outside the central area, and the first diffusion structure is coated on the solid spots and positions around the hollow spots on the circular disc; the second structure includes that circular rings arranged in concentric circles are distributed in the central area of the second diffusion structure, solid spots arranged in concentric circles are arranged outside the central area, and the second diffusion structure is coated on the circular rings and the solid spot areas. Intensities of diffusion structures on all circles of the first and the second structures become smaller and smaller from the center to the outside.
Description
Technical field
The present invention relates to the diffuser plate in a kind of backlight module, particularly a kind of diffuser plate with dot matrix diffusion structure being applied in the backlight module that adopts dot matrix backlight.
Background technology
At present, the liquid crystal module of flat-panel screens application adopts TFT-LCD technology more.TFT-LCD is inactive mode luminescence display, conventionally provides uniform system brightness by white light backlight module (Backlight Module), then obtains abundant color displays through colored filter (Color Filter).
Existing white light down straight aphototropism mode set comprises light source and optical diaphragm group.Light emitting diode (LED), because volume is little, power consumption few, therefore becomes one of light source of LCD backlight module.The light source of light emitting diode (LED) is lambertian distribution, and its distribution curve flux is characterized as by angle cosine decays gradually, and the LED that possesses this feature is dark in the bright periphery, Illumination Distribution WeiLED center of plane; LED collocation has the secondary optical lens that expands light effect, and can change its distribution curve flux is bat wing, but its Illumination Distribution in plane still centered by bright periphery dark.Being combined in of LED array formula array can be alleviated the bright dark uneven phenomenon that LED light distribution causes to a certain extent, but in the situation that light-emitting diodes tube pitch is enough large, still has the phenomenon of light illumination skewness.
For ensureing that backlight module provides uniform brightness, can adopt the mode that increases blooming piece use amount or print microstructure on blooming piece to improve dot matrix LED bright dipping non-uniform phenomenon.In order to overcome aforementioned dot matrix LED bright dipping non-uniform phenomenon, prior art (number of patent application is CN201010002819.3) designs diffusion structure on diffuser plate, its diffusion structure formed by single pattern and production realizability low.
Summary of the invention
The object of the present invention is to provide a kind of down straight aphototropism mode set with dot matrix backlight to use, can improve backlight outgoing light homogeneity and there is the diffuser plate with dot matrix diffusion structure of higher production exploitativeness.
For achieving the above object, the present invention adopts following design proposal, described diffuser plate is provided with dot matrix diffusion structure, described diffusion structure center is corresponding one by one with the light source center of backlight, described diffusion structure comprises two kinds of structures: the central area of structure one is a disk, described disk is provided with the hollow spot of arranging by donut, the outside of central area is the solid spot of arranging by donut, wherein in the non-hollow speckle regions of solid spot and disk, is coated with diffusion structure material; The central area of structure two is the annulus of arranging by donut, the outside of central area is the solid spot of arranging by donut, wherein annulus and solid speckle regions are coated with diffusion structure material, and the diffusion structure density in structure one and structure two on each annulus is outwards by center the trend that diminishes gradually.
Diffusion structure density in structure one and structure two on each annulus is set as follows:
y＝ax+b
Wherein x is annulus order, from inside to outside x=1,2,3,4....., n; Y is diffusion structure density, and the span of y is 0-1; A, b are linear function coefficient, and the span of a is that-1-0, b is greater than 0 positive number.
Diffusion structure density in structure one and structure two on each annulus can also be set as follows:
y
j＝a
jx
j+b
j
Wherein y
jthe linear functions different by m section form, and each linear function order represents with j, j=1, and 2 ... m; x
jfor annulus order, x
jfrom inside, extremely outside value is followed successively by 1,2,3 ... n; y
jfor diffusion structure density, span 0-1; a
j, b
jfor order be j linear function coefficient, wherein a
jspan be-1-1, b
jfor being greater than 0 positive number.
The area of the diffusion structure dispensing area on its each annulus of described diffusion structure is set as follows: printing_area=y × total_area=S
i=y × π × (D
i 2-D
i-1 2)
Wherein printing_area is the area of diffusion structure dispensing area in this annulus, with symbol S
irepresent; Total_area is the total area of this annulus; D
ifor the outer radius of a circle of this annulus, D
i-1for the outer radius of a circle of a upper annulus, i=1,2,3,4....., n; Y is diffusion structure density.
It is large that described diffusion structure density is set to internal density, and outside density is little, and described internal density scope is 0.4-1.0, and outside density range is 0-0.6.
The solid spot of described diffusion structure and hollow spot density can be done regional adjustment, and the shape in corresponding region comprises circle, ring-type, rectangle, triangle, trapezoidal, fan-shaped, star.
The solid spot of described diffusion structure and hollow spot shape comprise circle, ring-type, rectangle, triangle, trapezoidal, fan-shaped, star.
Described diffuser plate transmittance is between 40% to 80%, and diffuser plate mist degree is higher than 60%.
Described diffusion structure is formed by the material coating with reflection scattering nature, and its transmittance of described material is less than 50%.
Described diffusion structure is arranged at exiting surface or the incidence surface of diffuser plate.
Employing has a backlight module for the diffuser plate of dot matrix diffusion structure, comprises backboard, light-emitting device, diaphragm, and described diffuser plate is arranged between backlight module light-emitting device and diaphragm, and its light source of described light-emitting device is that dot matrix is arranged.
The present invention adopts above design proposal, is platelet-like reflective pattern by region, design centre, and the outside of central area is the dot matrix diffusion structure of point-like reflection graphic patterns, more meets the exploitativeness of production; Design according to diffusion structure density, design diffusion structure spot density is linear or multiple linear adjustables and distributes, by multiple linear formula and the adjustment of diffusion structure areal concentration are set, make the density of diffusion structure different densities value to be set in zones of different, the homogenising that is more conducive to dot matrix diffusion structure distributes, can improve backlight module because of the bright dark skewness problem of singularity that other factors such as its mechanism cause, reach the object of backlight module uniform mixed light.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments for brief description of the drawings:
Fig. 1 is the single diffusion structure of diffusion structure one of the present invention and four the diffusion structure dot matrixs schematic diagram of arranging;
Fig. 2 is the single diffusion structure of diffusion structure two of the present invention and four the diffusion structure dot matrixs schematic diagram of arranging;
Fig. 3 is the density profile schematic diagram that diffusion structure density of the present invention is single linear function;
Fig. 4 is the density profile schematic diagram that diffusion structure density of the present invention is 4 linear functions;
Fig. 5 is the diffusion structure region area account form schematic diagram of structure two of the present invention;
Fig. 6 is that diffusion structure density of the present invention is 4 linear function distribution schematic diagrams;
Fig. 7 is one of them embodiment of diffusion structure variable density mode of the present invention;
Fig. 8 is another embodiment of diffusion structure variable density mode of the present invention;
Fig. 9 is the back light module unit structure schematic diagram of practicality of the present invention.
Embodiment
In the present embodiment with single matrix diffusion structure and 4 matrix dot configuration diffusion structures, and speckle patterns is round dot, describe, described diffuser plate is applied to the down straight aphototropism mode set that adopts dot matrix backlight, described diffuser plate is provided with dot matrix diffusion structure, and described dot matrix diffusion structure center is corresponding one by one with the light source center of backlight.
Described diffusion structure comprises two kinds of structures:
As shown in Figure 1, the central area of structure one is a disk 1, described disk 1 is provided with the hollow spot of arranging by donut, and the outside of central area is the solid spot 2 of arranging by donut, wherein in the non-hollow speckle regions of solid spot and disk, is coated with diffusion structure material.
As shown in Figure 2, the central area of structure two is the annulus 3 of arranging by donut, and the outside of central area is the solid spot 4 of arranging by donut, and wherein annulus 3 and solid speckle regions are coated with diffusion structure material.
Diffusion structure density in structure one and structure two on each annulus can be set according to following formula:
y＝ax+b
Wherein x is annulus order, from inside to outside x=1,2,3,4....., n; Y is diffusion structure density, and the span of y is 0-1; A, b are linear function coefficient, and the span of a is that-1-0, b is greater than 0 positive number.
As shown in Figure 3, to formula y=ax+b, a gets-2/45, and b value is 38/45, obtains linear function y=-2/45x+38/45, and x value is 1 to 10, draws the diffusion structure density value on 1 to 10 ring annulus, and wherein the value of y is 0.4-1.0.
Diffusion structure density in structure one and structure two on each annulus can also be set according to following formula:
y
j＝a
jx
j+b
j
Wherein y
jthe linear functions different by m section form, and each linear function order represents with j, j=1, and 2 ... m; x
jfor annulus order, x
jfrom inside, extremely outside value is followed successively by 1,2,3 ... n; y
jfor diffusion structure density, span 0-1; a
j, b
jfor order be j linear function coefficient, wherein a
jspan be that-1-1, b is greater than 0 positive number.
As shown in Figure 4, to multistage linear function y
j=a
jx
j+ b
jcan carry out following value, j gets 1,2,3 and 4 and is made up of four linear function, the each section of corresponding x of linear function
jvalue is 1 to 10, specific as follows:
According to as above formula, obtain diffusion structure density profile as shown in Figure 4.
As shown in Figure 5, according to distribution trend shown in Fig. 4, taking diffusion structure one as example, its diffusion structure diagram is shown in Fig. 5, the hollow spot size of corresponding annular region 5 diminishes, and makes the diffusion patterned density of corresponding annulus increase, and ascensional range designs according to outshot shown in the curve of Fig. 4.
As shown in Figure 6, diagram has disclosed the area setting means of the diffusion structure dispensing area on each annulus, and concrete formula is as follows:
printing_area＝y×total_area＝S
i＝y×π×(D
i 2-D
i-1 2)
Wherein printing_area is the area of diffusion structure dispensing area in this annulus, and Fig. 6 is illustrated as dot matrix diffusion structure dispensing area area in the second annulus, for point-like in figure is filled and oblique line part area, with symbol S
irepresent; Total_area is the total area of this annulus, and i.e. figure bend part area; D
ifor the outer radius of a circle of this annulus, D
i-1for the outer radius of a circle of a upper annulus, i=1,2,3,4....., n; Y is diffusion structure density.Fig. 6 illustrates according to calculating gained S
idetermine the coating width of annulus pattern, concrete, according to the difference of diffusion structure coated pattern, the size of coated pattern and quantity account form are done corresponding variation.
According to the diffusion structure dispensing area area computing formula of the above, total_area is shaped as an annulus, wherein D
ifor described annulus exradius, if each D
ibetween be equal difference relation, adjacent annulus and annulus are equidistant; If each D
ibe non-equal difference relation, firm adjacent annulus and annulus are non-equidistance.At each D
iin definite situation, the region area of diffusion structure coating also can be adjusted, and is specially the radius of the solid spot in diffusion structure one and diffusion structure two, hollow spot and the interior external radius of annulus can be adjusted.By adjusting described annulus exradius D
iand the size of diffusion structure spot, can realize the control of diffusion structure density y value.
In diffusion structure actual design process, need to consider that structure should be as far as possible little, avoid causing because diffusion structure is excessive not shieldable shade; Within physical dimension minimum value should be controlled at actual process feasible region simultaneously.The uneven illumination characteristic presenting at diffuser plate for lattice light source, designs the intensity scheme of certain trend, passes through D
iand the adjustment of diffusion structure spot size, meet the demand of density design load, reach the object of improving the bright dark uneven phenomenon of illumination.
Diffusion structure density can be carried out regionality adjustment, can adjust the density of diffusion structure according to different linear functions at regional, the shape in described region comprises circle, ring-type, rectangle, triangle, trapezoidal, fan-shaped, star, and adjustment mode can realize by the change of spot spacing and size.As shown in Figure 7 and Figure 8, in figure, describe as an example of structure one example, Fig. 7 illustrates diffusion structure spot density to do sector region adjustment at different axial directions, and Fig. 8 illustrates diffusion structure spot density to do polygonal region adjustment.
In embodiment, diffusion structure is coated on diffuser plate, and described diffuser plate transmittance is between 40% to 80%, and the mist degree of diffuser plate is higher than 60%; Described diffusion structure is formed by the material coating with reflection scattering nature, and this material transmittance is less than 50%; Described diffusion structure speckle patterns, except the circle described in embodiment, also can be ring-type, rectangle, triangle, trapezoidal, fan-shaped, star; Described diffusion structure can be arranged at exiting surface or the incidence surface of diffuser plate.
As shown in Figure 9, a kind of employing has the backlight module of the diffuser plate of dot matrix diffusion structure, backlight module is except comprising the diffuser plate 8 with dot matrix diffusion structure, also comprise backboard 6, light-emitting device 7, diaphragm 9, described light-emitting device 7 its light sources 11 are arranged for dot matrix, and the quantity of diaphragm 9 can increase according to actual needs.Diffusion structure array quantity determines according to the size of backlight module and the quantity of light source, generally speaking, the quantity of light source that more large-sized backlight module uses is more, light source is array and arranges, be generally rectangular array or staggered equilateral triangle array arrangement, the distribution of diffusion structure on diffuser plate is corresponding one by one with array of source.
Claims (10)
1. one kind has the diffuser plate of dot matrix diffusion structure, it is characterized in that: described diffuser plate is provided with dot matrix diffusion structure, described dot matrix diffusion structure center is corresponding one by one with the light source center of backlight, described diffusion structure comprises two kinds of structures: the central area of structure one is a disk, described disk is provided with the hollow spot of arranging by donut, the outside of central area is the solid spot of arranging by donut, wherein in the non-hollow speckle regions of solid spot and disk, is coated with diffusion structure material; The central area of structure two is the annulus of arranging by donut, the outside of central area is the solid spot of arranging by donut, wherein annulus and solid speckle regions are coated with diffusion structure material, and the diffusion structure density in structure one and structure two on each annulus is outwards by center the trend that diminishes gradually; Diffusion structure density in described structure one and structure two on each annulus is set according to following formula:
y＝ax+b
Wherein x is annulus order, from inside to outside x=1,2,3,4....., n; Y is diffusion structure density, and the span of y is 0-1; A, b are linear function coefficient, and the span of a is that-1-0, b is greater than 0 positive number.
2. a kind of diffuser plate with dot matrix diffusion structure according to claim 1, is characterized in that: the diffusion structure density in described structure one and structure two on each annulus is set according to following formula:
y
j＝a
jx
j+b
j
Wherein y
jthe linear functions different by m section form, and each linear function order represents with j, j=1, and 2 ... m; x
jfor annulus order, x
jfrom inside, extremely outside value is followed successively by 1,2,3 ... n; y
jfor diffusion structure density, span 0-1; a
j, b
jfor order be j linear function coefficient, wherein a
jspan be-1-1, b
jfor being greater than 0 positive number.
3. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, is characterized in that: the area of the diffusion structure dispensing area on its each annulus of described diffusion structure is set as follows:
printing_area＝y×total_area＝S
i＝y×π×(D
i 2-D
i-1 2)
Wherein printing_area is the area of diffusion structure dispensing area in this annulus, with symbol S
irepresent; Total_area is the total area of this annulus; D
ifor the outer radius of a circle of this annulus, D
i-1for the outer radius of a circle of a upper annulus, i=1,2,3,4....., n; Y is diffusion structure density.
4. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, it is characterized in that: it is large that described diffusion structure density is set to internal density, outside density is little, and described internal density scope is 0.4-1.0, and outside density range is 0-0.6.
5. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, it is characterized in that: the solid spot of described diffusion structure and hollow spot density can be done regional adjustment, and the shape in corresponding region comprises circle, ring-type, rectangle, triangle, trapezoidal, fan-shaped, star.
6. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, is characterized in that: the solid spot of described diffusion structure and hollow spot shape comprise circle, ring-type, rectangle, triangle, trapezoidal, fan-shaped, star.
7. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, is characterized in that: described diffuser plate transmittance is between 40% to 80%, and diffuser plate mist degree is higher than 60%.
8. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, is characterized in that: described diffusion structure is formed by the material coating with reflection scattering nature, and its transmittance of described material is less than 50%.
9. a kind of diffuser plate with dot matrix diffusion structure according to claim 1 and 2, is characterized in that: described diffusion structure is arranged at exiting surface or the incidence surface of diffuser plate.
10. one kind adopts the backlight module of a kind of diffuser plate with dot matrix diffusion structure described in claim 1 or 2, comprise backboard, light-emitting device, diaphragm, it is characterized in that: described diffuser plate is arranged between backlight module light-emitting device and diaphragm, its light source of described light-emitting device is that dot matrix is arranged.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210257025.0A CN102767786B (en) | 2012-07-23 | 2012-07-23 | Diffusion plate with dot-matrix diffusion structures and backlight module utilizing same |
| TW101140354A TW201405216A (en) | 2012-07-23 | 2012-10-31 | Backlight module |
| US13/846,029 US20140022762A1 (en) | 2012-07-23 | 2013-03-18 | Backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210257025.0A CN102767786B (en) | 2012-07-23 | 2012-07-23 | Diffusion plate with dot-matrix diffusion structures and backlight module utilizing same |
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| Publication Number | Publication Date |
|---|---|
| CN102767786A CN102767786A (en) | 2012-11-07 |
| CN102767786B true CN102767786B (en) | 2014-10-15 |
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| Country | Link |
|---|---|
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| TW (1) | TW201405216A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900027A (en) * | 2012-12-28 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Optical module |
| CN103234172B (en) | 2013-04-16 | 2015-03-11 | 冠捷显示科技（厦门）有限公司 | Diffusion plate structure and application thereof in backlight module |
| WO2015075251A1 (en) * | 2013-11-25 | 2015-05-28 | Koninklijke Philips N.V. | Luminaire with a light diffuser |
| CN105301841A (en) * | 2015-11-23 | 2016-02-03 | 青岛海信电器股份有限公司 | Backlight module and liquid crystal display equipment |
| CN106842391A (en) * | 2015-12-03 | 2017-06-13 | 扬升照明股份有限公司 | Optical diffusing plate and light source module |
| CN110824596B (en) * | 2018-08-07 | 2021-12-14 | 中强光电股份有限公司 | Diffusion plate, direct type backlight module and display device |
| CN112180661B (en) * | 2019-07-04 | 2022-08-02 | 无锡视美乐激光显示科技有限公司 | Scattering adjusting device, light source and projection system |
| TWI710837B (en) * | 2019-11-21 | 2020-11-21 | 友達光電股份有限公司 | Backlight module |
| CN113494685A (en) * | 2020-03-20 | 2021-10-12 | 深圳市绎立锐光科技开发有限公司 | Lighting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790129A (en) * | 2004-12-14 | 2006-06-21 | 奇美电子股份有限公司 | Direct type spot light source backlight module and liquid crystal display employing the same |
| CN101295044A (en) * | 2007-04-27 | 2008-10-29 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
| CN101644415A (en) * | 2008-08-09 | 2010-02-10 | 清华大学 | Light guide plate and backlight module |
| CN202708984U (en) * | 2012-07-23 | 2013-01-30 | 冠捷显示科技（厦门）有限公司 | Diffusion plate of dot-matrix type diffusion structures and backlight module using same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126821B (en) * | 2006-08-18 | 2011-06-08 | 鸿富锦精密工业（深圳）有限公司 | Optical board and the backlight module group using same |
-
2012
- 2012-07-23 CN CN201210257025.0A patent/CN102767786B/en active Active
- 2012-10-31 TW TW101140354A patent/TW201405216A/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790129A (en) * | 2004-12-14 | 2006-06-21 | 奇美电子股份有限公司 | Direct type spot light source backlight module and liquid crystal display employing the same |
| CN101295044A (en) * | 2007-04-27 | 2008-10-29 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
| CN101644415A (en) * | 2008-08-09 | 2010-02-10 | 清华大学 | Light guide plate and backlight module |
| CN202708984U (en) * | 2012-07-23 | 2013-01-30 | 冠捷显示科技（厦门）有限公司 | Diffusion plate of dot-matrix type diffusion structures and backlight module using same |
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|---|---|
| CN102767786A (en) | 2012-11-07 |
| TW201405216A (en) | 2014-02-01 |
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