CN101315438A - Diffusion polarizing piece and backlight module using the same - Google Patents
Diffusion polarizing piece and backlight module using the same Download PDFInfo
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- CN101315438A CN101315438A CNA2007101087360A CN200710108736A CN101315438A CN 101315438 A CN101315438 A CN 101315438A CN A2007101087360 A CNA2007101087360 A CN A2007101087360A CN 200710108736 A CN200710108736 A CN 200710108736A CN 101315438 A CN101315438 A CN 101315438A
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- projection
- backlight module
- polarizing piece
- diffusion
- diffusion polarizing
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Abstract
The invention discloses a diffusing polaroid which comprises a base material and a microstructure layer which is configured on the base material, wherein the microstructure layer comprises a solid liquid crystal material with the birefringence property. The diffusing polaroid also has the function of homogenizing and polarizing the incident light. In addition, the invention further discloses a back light module adopting the diffusing polaroid.
Description
Technical field
The present invention relates to a kind of blooming piece (optical film) and use its light source module, and be particularly related to a kind of diffusion polarizing piece (diffusing polarizer) and use its backlight module.
Background technology
Along with electronic industry is flourishing day by day, flat-panel screens is eliminated cathode-ray tube display, becomes present main flow.And in flat-panel screens, again with the most skillful and universalness of technology of LCD.Yet, because the display panels of LCD itself can't be luminous, thus below display panels, must provide backlight module so that light source to be provided, and then reach the function of demonstration.
Fig. 1 is a kind of cut-away view of known backlight module.Please refer to Fig. 1, backlight module 100 comprises a plurality of light sources 110, multi-disc blooming piece 120 and lamp box 130.Light source 110 is disposed in the lamp box 130, and lamp box 130 fixed light sources 110 and blooming piece 120.And the light that light source 110 is sent forms even and concentrated area source through blooming piece 120 backs.
Known optical diaphragm group can comprise diffusion sheet and brightening piece usually, and diffusion sheet can make the incident light homogenising, and brightening piece can make light concentrate to improve the service efficiency of light source.
In addition, known brightening piece also can have birefringence, and the incident light of particular polarization is passed through, and the incident light reflection of other polarization directions is also utilized again.So can improve the ratio that light enters display panels, yet, the method that known brightening piece is reached birefringence forms for the multilayer material with different refractivity piles up alternately, so, the weight and the thickness of brightening piece can't be reduced, and light also can produce consume by the interface between the layers of material time, reduces the service efficiency of light source, makes yield rate and also is restricted.
Summary of the invention
The invention provides a kind of diffusion polarizing piece, it has the function with incident light polarizationization and homogenising.
The present invention provides a kind of backlight module in addition, and it uses above-mentioned diffusion polarizing piece and can reduce number of elements.
The present invention proposes a kind of diffusion polarizing piece, comprises base material and microstructured layers, and microstructured layers is disposed at base material, and wherein microstructured layers comprises solid-state liquid crystal material, and solid-state liquid crystal material has birefringence.
In one embodiment of this invention, above-mentioned diffusion polarizing piece also comprises a plurality of diffusion particles, is doped in the base material.
In one embodiment of this invention, above-mentioned microstructured layers comprises a plurality of projections.
In one embodiment of this invention, above-mentioned each projection is a list structure, and list structure is the palisade arrangement.
In one embodiment of this invention, the vertical cross-section of above-mentioned each projection is a triangle.
In one embodiment of this invention, the vertical cross-section of above-mentioned each projection is trapezoidal.
In one embodiment of this invention, the vertical cross-section of above-mentioned each projection is a half elliptic.
In one embodiment of this invention, above-mentioned each projection is a ring texture, and ring texture is the concentric circles arrangement.
In one embodiment of this invention, above-mentioned projection is a cone structure, and cone structure is regularly arranged.
In one embodiment of this invention, above-mentioned projection is a cone structure, and cone structure is irregular alignment.
The present invention proposes a kind of backlight module in addition, comprises planar light source device and diffusion polarizing piece.Planar light source device has exiting surface.Diffusion polarizing piece is disposed at the exiting surface top of planar light source device, and wherein diffusion polarizing piece comprises base material and microstructured layers.Microstructured layers is disposed at base material, and wherein microstructured layers comprises solid-state liquid crystal material, and solid-state liquid crystal material has birefringence.
In one embodiment of this invention, the base material of above-mentioned diffusion polarizing piece also comprises a plurality of diffusion particles.
In one embodiment of this invention, above-mentioned microstructured layers comprises a plurality of projections.
In one embodiment of this invention, above-mentioned each projection is a list structure, and list structure is the palisade arrangement.
In one embodiment of this invention, the vertical cross-section of above-mentioned each projection is a triangle.
In one embodiment of this invention, the vertical cross-section of above-mentioned each projection is trapezoidal.
In one embodiment of this invention, the vertical cross-section of above-mentioned each projection is a half elliptic.
In one embodiment of this invention, above-mentioned each projection is a ring texture, and ring texture is the concentric circles arrangement.
In one embodiment of this invention, above-mentioned projection is a cone structure, and cone structure is regularly arranged.
In one embodiment of this invention, above-mentioned projection is a cone structure, and cone structure is irregular alignment.
In one embodiment of this invention, above-mentioned area source comprises directly-down light source or side incident type light source.
In one embodiment of this invention, above-mentioned area source has at least one light-emitting component.
In one embodiment of this invention, above-mentioned light-emitting component comprises organic electroluminescent device, cold-cathode fluorescent plant lamp, cathode fluorescent tube, or light emitting diode.
Diffusion polarizing piece of the present invention has the solid-state liquid crystal material of birefringence because of use, therefore do not need sandwich construction can reach birefringent function, and when this diffusion polarizing piece was applied to backlight module, the blooming piece that can reduce backlight module used number, thickness and weight.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is a kind of cut-away view of known backlight module.
Fig. 2 is the cut-away view of diffusion polarizing piece in one embodiment of the invention.
Fig. 3 is the cut-away view of diffusion polarizing piece in another embodiment of the present invention.
Fig. 4 is the configuration mode synoptic diagram of projection among Fig. 2.
Fig. 5 and Fig. 6 are the cut-away view of other embodiments of projection among Fig. 2.
Fig. 7 to Fig. 9 is other configuration mode synoptic diagram of projection among Fig. 2.
Figure 10 is the cut-away view of the backlight module of one embodiment of the invention.
Figure 11 is the cut-away view of the backlight module of another embodiment of the present invention.
Description of reference numerals
100: backlight module 110: light source
120: blooming piece 130: lamp box
200: diffusion polarizing piece 210: base material
212: diffusion particle 220: microstructured layers
222: solid-state liquid crystal material 222a: drip the shape high polymer dispersed liquid crystal
224: projection 300,300 ': backlight module
310,310 ': area source 310a: exiting surface
312: light-emitting component 314: lamp box
316: light guide plate 318: lampshade
318a: opening
Embodiment
Fig. 2 is the cut-away view of diffusion polarizing piece in one embodiment of the invention.Please refer to Fig. 2, diffusion polarizing piece 200 comprises base material 210 and microstructured layers 220, and wherein microstructured layers 220 is disposed at base material 210.Microstructured layers 220 comprises solid-state liquid crystal material 222, and solid-state liquid crystal material 222 has birefringence.The material of base material 210 for example is polyethylene terephthalate (polyethylene terephthalate, PET), polymethylmethacrylate (polymethyl methacrylate, PMMA), polycarbonate (polycarbonate, PC), polystyrene (polystyrene, PS) etc., 220 of microstructured layers for example are the ultraviolet curing glue material.Solid-state liquid crystal material 222 for example comprises with the macromolecule glue material and combining with liquid crystal molecule and a plurality of shape high polymer dispersed liquid crystals (the polymer dispersed liquid crystal drop) 222a that forms.Microstructured layers 220 can reach effect with each shape high polymer dispersed liquid crystal 222a orientation by structural design, so that microstructured layers 220 has birefringence, and can carry out the orientation of ultraviolet curing to microstructured layers 220 with the fixing shape high polymer dispersed liquid crystal 222a of dripping.In addition, present embodiment also can promote the regiospecific of each shape high polymer dispersed liquid crystal 222a by extra electric field or the mode that applies outside orientation power.
Because the solid-state liquid crystal material 222 of diffusion polarizing piece 200 has birefringence, the light of particular polarization is passed through, and reflect the light of other polarization directions, therefore make diffusion polarizing piece 200 have the function that makes polarization of lightization, and diffusion polarizing piece 200 is scatter reflections when reflection ray, therefore makes diffusion polarizing piece 200 have the function of the equalizing light rays of making.So, only need a slice diffusion polarizing piece 200 promptly to have the effect of reflective polarizer and diffusion sheet simultaneously.
Fig. 3 is the cut-away view of diffusion polarizing piece in another embodiment of the present invention.In the present embodiment, more can be mixed with a plurality of diffusion particles 212 in the base material 210 of diffusion polarizing piece 200a, with the effect of further raising diffusion polarizing piece 200a to equalizing light rays.In addition, microstructured layers 220 more can comprise a plurality of projections 224, and projection 224 can make by the light of diffusion polarizing piece 200 and concentrate, to improve the service efficiency of light.Fig. 4 is the configuration mode synoptic diagram of projection among Fig. 2.Please refer to Fig. 2 and Fig. 4, by finding out among Fig. 4, projection 224 is a list structure, and is the palisade arrangement, and can find out among Fig. 2 that the vertical cross-section of projection 224 is a triangle, but the present invention is not as limit.Fig. 5 and Fig. 6 are the cut-away view of other embodiments of projection among Fig. 2.Please refer to Fig. 5 and Fig. 6, by finding out among Fig. 5, the vertical cross-section of microstructured layers 220 is a half elliptic, and in Fig. 6, the vertical cross-section of microstructured layers 220 is trapezoidal.
In addition, the structure of projection 224 is not also exceeded with above-mentioned list structure, and Fig. 7 to Fig. 9 is other configuration mode synoptic diagram of projection among Fig. 2.Please earlier with reference to Fig. 7, by finding out among Fig. 7, projection 224 is a ring texture, and each ring texture is the concentric circles arrangement.Please refer to Fig. 8 and Fig. 9, in Fig. 8, projection 224 is a cone structure, and is regularly arranged, and in Fig. 9, projection 224 also is a cone structure, but is irregular alignment.Though it should be noted that the projection 224 in Fig. 8 and Fig. 9 is the example explanation with pyramidal, those skilled in the art also can change projection 224 into other shape according to need, for example is coniform.
It should be noted that the diffusion polarizing piece in the various embodiments described above all can add diffusion particle as the diffusion polarizing piece among Fig. 3 in base material, to strengthen diffusion effect.
Below will cooperate graphic explanation to use the backlight module of above-mentioned diffusion polarizing piece.Figure 10 is the cut-away view of the backlight module of one embodiment of the invention.Please refer to Figure 10, backlight module 300 comprises area source 310 and above-mentioned diffusion polarizing piece 200, and wherein area source 310 has exiting surface 310a, and diffusion polarizing piece 200 is disposed on the exiting surface 310a.
Because the solid-state liquid crystal material of diffusion polarizing piece has birefringence, the light of particular polarization is passed through, and reflect the light of other polarization directions, therefore diffusion polarizing piece had to make the function of polarization of lightization, and diffusion polarizing piece is scatter reflections when reflection ray, therefore makes diffusion polarizing piece have the function of the equalizing light rays of making.In addition, microstructured layers can have a plurality of projections, makes diffusion polarizing piece have the function of concentrated incident light.So, when this diffusion polarizing piece is applied to backlight module, only need a slice diffusion polarizing piece promptly to have the effect of polaroid, diffusion sheet and brightening piece simultaneously, not only can improve the service efficiency of area source, also can reduce the thickness and the weight of backlight module, more can reduce the number of assembling steps when making backlight module, and then save cost and improve output.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; technical field those of ordinary skill under any; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when looking being as the criterion that accompanying Claim defines.
Claims (23)
1. diffusion polarizing piece comprises:
Base material; And
Microstructured layers is disposed at this base material, and wherein this microstructured layers comprises solid-state liquid crystal material, and this solid-state liquid crystal material has birefringence.
2. diffusion polarizing piece as claimed in claim 1 also comprises a plurality of diffusion particles in its base material.
3. diffusion polarizing piece as claimed in claim 1, wherein this microstructured layers comprises a plurality of projections.
4. diffusion polarizing piece as claimed in claim 3, wherein this projection is a list structure, and this list structure is the palisade arrangement.
5. diffusion polarizing piece as claimed in claim 4, wherein the vertical cross-section of this projection is a triangle.
6. diffusion polarizing piece as claimed in claim 4, wherein the vertical cross-section of this projection is trapezoidal.
7. diffusion polarizing piece as claimed in claim 4, wherein the vertical cross-section of this projection is a half elliptic.
8. diffusion polarizing piece as claimed in claim 3, wherein this projection is a ring texture, and this ring texture is the concentric circles arrangement.
9. diffusion polarizing piece as claimed in claim 3, wherein this projection is a cone structure, and this cone structure is regularly arranged.
10. diffusion polarizing piece as claimed in claim 3, wherein this projection is a cone structure, and this cone structure is irregular alignment.
11. a backlight module comprises:
Area source has exiting surface;
Diffusion polarizing piece is disposed at above this exiting surface of this planar light source device, and this diffusion polarizing piece comprises:
Base material; And
Microstructured layers is disposed at this base material, and wherein this microstructured layers comprises solid-state liquid crystal material, and this solid-state liquid crystal material has birefringence.
12. backlight module as claimed in claim 11, wherein the base material of this diffusion polarizing piece also comprises a plurality of diffusion particles.
13. backlight module as claimed in claim 11, wherein this microstructured layers comprises a plurality of projections.
14. backlight module as claimed in claim 13, wherein this projection is a list structure, and this list structure is the palisade arrangement.
15. backlight module as claimed in claim 14, wherein the vertical cross-section of this projection is a triangle.
16. backlight module as claimed in claim 14, wherein the vertical cross-section of this projection is trapezoidal.
17. backlight module as claimed in claim 14, wherein the vertical cross-section of this projection is a half elliptic.
18. backlight module as claimed in claim 13, wherein this projection is a ring texture, and this ring texture is the concentric circles arrangement.
19. backlight module as claimed in claim 13, wherein this projection is a cone structure, and this cone structure is regularly arranged.
20. backlight module as claimed in claim 13, wherein this projection is a cone structure, and this cone structure is irregular alignment.
21. backlight module as claimed in claim 11, wherein this area source comprises directly-down light source or side incident type light source.
22. backlight module as claimed in claim 11, wherein this area source has at least one light-emitting component.
23. backlight module as claimed in claim 22, wherein this light-emitting component comprises organic electroluminescent device, cold-cathode fluorescent plant lamp, cathode fluorescent tube, or light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101087360A CN101315438A (en) | 2007-05-31 | 2007-05-31 | Diffusion polarizing piece and backlight module using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101087360A CN101315438A (en) | 2007-05-31 | 2007-05-31 | Diffusion polarizing piece and backlight module using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101315438A true CN101315438A (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101087360A Pending CN101315438A (en) | 2007-05-31 | 2007-05-31 | Diffusion polarizing piece and backlight module using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101315438A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896567A (en) * | 2017-03-17 | 2017-06-27 | 京东方科技集团股份有限公司 | A kind of polaroid and display device |
| CN111158078A (en) * | 2018-11-08 | 2020-05-15 | 三星电子株式会社 | Backlight unit and holographic display device including the same |
-
2007
- 2007-05-31 CN CNA2007101087360A patent/CN101315438A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896567A (en) * | 2017-03-17 | 2017-06-27 | 京东方科技集团股份有限公司 | A kind of polaroid and display device |
| WO2018166182A1 (en) * | 2017-03-17 | 2018-09-20 | 京东方科技集团股份有限公司 | Polarizer and display device |
| CN106896567B (en) * | 2017-03-17 | 2019-06-14 | 京东方科技集团股份有限公司 | A kind of polaroid and display device |
| US10983384B2 (en) | 2017-03-17 | 2021-04-20 | Boe Technology Group Co., Ltd. | Polarizer and display device |
| CN111158078A (en) * | 2018-11-08 | 2020-05-15 | 三星电子株式会社 | Backlight unit and holographic display device including the same |
| CN111158078B (en) * | 2018-11-08 | 2024-02-27 | 三星电子株式会社 | Backlight unit and holographic display device including the same |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20081203 |