CN101446656A - Optical film and liquid crystal display including the optical film - Google Patents
Optical film and liquid crystal display including the optical film Download PDFInfo
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- CN101446656A CN101446656A CNA2008102159572A CN200810215957A CN101446656A CN 101446656 A CN101446656 A CN 101446656A CN A2008102159572 A CNA2008102159572 A CN A2008102159572A CN 200810215957 A CN200810215957 A CN 200810215957A CN 101446656 A CN101446656 A CN 101446656A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/001—Phase modulating patterns, e.g. refractive index patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
- Polarising Elements (AREA)
Abstract
An optical film and a liquid crystal display including the optical film are disclosed. The optical film includes a reflective polarizing film, a first primer layer on the reflective polarizing film, and a first projection on the first primer layer.
Description
Technical field
Exemplary embodiment relates to blooming that comprises reflective polarizer films and the LCD that comprises this blooming.
Background technology
Recently, be that the demonstration field of visual information is rapidly developed with the information translation of a plurality of electric signal.Thus, introduced the flat-panel display device that has such as the excellent properties of film, very light in weight, low-power consumption.Flat-panel display device has replaced existing cathode-ray tube (CRT) fast and has come into one's own.
The example of flat-panel display device can comprise LCD (LCD), plasma display (PDP), Field Emission Display (FED) and electroluminescent display (ELD).Because LCD has high contrast ratio and excellent properties shows motion picture, LCD promptly is used for the display screen of notebook, monitor and TV.
LCD can be classified as the light-receiving display device.LCD can comprise: liquid crystal panel for displaying images; And back light unit, be arranged on below the liquid crystal panel and and offer liquid crystal panel light.
Back light unit can comprise light source and the blooming that light is offered liquid crystal panel.Blooming can comprise diffusion disk, brightening piece or screening glass.
Blooming can comprise a plurality of optical sheets, is used to carry out diffusion of light and the focusing that is produced by light source.Yet, for fabrication yield that improves LCD and brightness, also have a lot of problems.
Summary of the invention
The LCD that exemplary embodiment provides blooming and comprises this blooming, this LCD can provide clearly image and improve optical efficiency.
In one aspect, blooming comprises reflective polarizer films, in first undercoat on the reflective polarizer films and first projection on first undercoat.
On the other hand, liquid crystal display device comprises light source, at blooming on the light source and the liquid crystal panel on blooming, this blooming comprises reflective polarizer films, at the basement membrane on the reflective polarizer films, in epilamellar first undercoat, first projection on first undercoat.
Aspect another, blooming comprises reflective polarizer films, the basement membrane on reflective polarizer films and in epilamellar a plurality of projectioies, these a plurality of projectioies comprise first projection and second projection, and the height of this first projection is different from the height of second projection.
Description of drawings
Be included to provide for further understanding of the present invention, and combined and form the accompanying drawing of the part of this instructions, embodiments of the invention are shown, and together explain principle of the present invention with describing.In the accompanying drawings:
Fig. 1-7 illustrates the blooming according to exemplary embodiment;
Fig. 8 is the sectional view according to the blooming of another example embodiment;
Fig. 9 to 11 is the sectional views according to the blooming of another example embodiment;
Figure 12 illustrates the blooming according to another example embodiment;
Figure 13 is the view that amplifies the A district of Figure 12;
Figure 14 is the planimetric map of Figure 12;
Figure 15 to 23 illustrates the blooming according to another embodiment;
Figure 24 and 25 is decomposition diagram and sectional views of back light unit;
Figure 26 and 27 is decomposition diagram and sectional views of back light unit; And
Figure 28 and 29 is decomposition diagram and sectional views of LCD.
Embodiment
Referring now to specific embodiment of the present invention, the example of these specific embodiment shown in the drawings.
Blooming comprises reflective polarizer films, in first undercoat on the reflective polarizer films and first projection on this first undercoat.
Blooming can also be included in second undercoat below the reflective polarizer films, and the thickness of this second undercoat is in the scope between 5nm and the 300nm basically.
Blooming can also be included in the protective seam on the reflecting polarizing layer.
The thickness of first undercoat is in the scope between 5nm and the 300nm basically.
First projection can be at least one in microlens array, lenticular lens array, diffusing globe unit and the prism unit.
First projection can comprise a plurality of pearls.
Reflective polarizer films can comprise the alternately laminated each other ground floor and the second layer, and the refractive index of ground floor can be different from the refractive index of the second layer.
Blooming can also be included in the basement membrane on the reflective polarizer films, and wherein, first undercoat can be arranged on the basement membrane.
Liquid crystal display device comprises light source, at blooming on the light source and the liquid crystal panel on blooming, this blooming comprises reflective polarizer films, at the basement membrane on this reflective polarizer films, in epilamellar first undercoat and first projection on first undercoat.
The thickness of first undercoat can be in the scope between 5nm and the 300nm basically.
Blooming comprises reflective polarizer films, the basement membrane on reflective polarizer films and in epilamellar a plurality of projectioies, this projection comprises first projection and second projection, and the height of first projection is different from the height of second projection.
Projection vertically can have different height along projection.
Blooming can also be included in epilamellar first undercoat.
The thickness of first undercoat is in the scope between 5nm and the 300nm basically.
Projection can comprise a plurality of paddy, and the degree of depth of these paddy can differ from one another.
Projection can comprise a plurality of peaks, and the height at these peaks can randomly changing.
A plurality of projectioies can comprise a plurality of first pearls.
Blooming can also be included in the protective seam below the reflective polarizer films, and this protective seam can be diffusion unit or laying.
Protective seam can comprise resin and a plurality of second pearl.
Hereinafter, exemplary embodiment will be described in detail with reference to the accompanying drawings.
Fig. 1-7 illustrates the blooming 200 according to exemplary embodiment.
Shown in Fig. 1 to 7, blooming 200 can comprise reflective polarizer films 210, in first undercoat 220 on the reflective polarizer films 210 and first projection 230 on first undercoat 220.
The light that is produced by light source can be launched and/or reflect to reflective polarizer films 210.Reflective polarizer films 210 can comprise the ground floor 211 that comprises polymkeric substance and the second layer 212 of adjacent first layer 211.The second layer 212 can comprise polymkeric substance, and this polymkeric substance has the different refractive index of refractive index with the polymkeric substance of ground floor 211.
The ground floor 211 and the second layer 212 can be alternately laminated each other.Ground floor 211 can be made by polymethylmethacrylate (PMMA), and the second layer 212 can be made by polyethylene terephthalate (PET).
Therefore, polarizing coating 210 transmissions that are reflected of the part of the light that produces by light source, and the part of light from reflective polarizer films 210 towards reflective polarizer films the source reflection below 210.Incorporated into by secondary reflection again to the light of source reflection and to be mapped on the reflective polarizer films 210.A part that incides the light on the reflective polarizer films 210 is by reflective polarizer films 210 transmissions, and the part of the incident light source reflection below 210 from reflective polarizer films 210 towards reflective polarizer films once more.
In other words, because by following formation reflective polarizer films 210, that is: use the principle of coming the polarization of the polarization of transmission different directions and reflection equidirectional by the molecule of orientated polymer in one direction, go up each other stacked each all have the polymeric layer of different refractivity, so can improve the efficient of the light that produces by light source.
The transmissison characteristic and the adhesion characteristics of first undercoat 220 depended in following table 1 indication.In table 1, ◎ indicates excellent state, zero indication kilter, and △ indication normal state.
Table 1
| The thickness of first undercoat (nm) | Transmissison characteristic | Adhesion characteristics |
| 3 | ◎ | △ |
| 5 | ◎ | △ |
| 10 | ◎ | △ |
| 30 | ◎ | ○ |
| 90 | ○ | ○ |
| 130 | ○ | ○ |
| 200 | ○ | ◎ |
| 250 | △ | ◎ |
| 300 | △ | ◎ |
Shown in top table 1, can improve brightness and chromaticity coordinates by the thickness of meticulous adjusting first undercoat 220.
Therefore, when between the reflective polarizer films 210 and first projection 230, carrying out the undercoat processing, can improve transmittance and adhesion characteristics by the thickness of regulating first undercoat 220.
In other words, reflective polarizer films 210 can comprise (poly-based) resin based on polymkeric substance, and first projection 230 can comprise the resin of handling based on UV.If reflective polarizer films 210 is attached to first projection 230 by physical attachment, then be difficult to expect excellent adhesion, because the adhesive surface between the reflective polarizer films 210 and first projection 230 is smooth.Yet; when passing through between the reflective polarizer films 210 and first projection 230, to form first undercoat 220; utilize chemical adhesion that reflective polarizer films 210 is attached at first protruding 230 o'clock; the adhesion stronger can be obtained, and the adhesive surface between the reflective polarizer films 210 and first projection 230 can be protected than the adhesion of physical attachment.
Below reaction equation 1 indication be used as first protruding 230 and polyurethane 230 is hardened in the chemical equation between resin and the polyurethane when being used as first undercoat 220 according to UV when resin.
[reaction equation 1]
Distance P between the peak 231 of first projection 230 can be that 20 μ m are to 60 μ m basically.The angle A at peak 231 can be 70 ° to 110 ° basically.The height H of first projection 230 can be that 10 μ m are to 300 μ m basically.
As shown in Figure 3, the peak 231 of first projection 230 or paddy 232 can first projection 230 vertically on form continuous curve.Curve can be regular or irregular.More specifically, peak 231 can form with the form of zigzag, and wherein right side and left side are at random.The average level amplitude at peak 231 can be in the scope between 1 μ m and the 20 μ m basically.In addition, paddy 232 can form with the form of zigzag, and wherein, right side and left side are at random.The average level amplitude of paddy 232 can be located substantially in the scope between 1 μ m and the 20 μ m.
The height h at the peak of measuring as 231 the basal surface from the peak 231 can change continuously along the longitudinal axis of first projection 230.Peak 231 can formation rule or irregular curve.Average height difference between the height at peak 231 can be located substantially in the scope between 1 μ m and the 20 μ m.
More specifically, first projection 230 as shown in Figure 4, can be a microlens array.First projection 230 can be the array of a plurality of lenticules 235.Diffusion of light, refraction or focusing can be depended on the diameter and the density of lenticule 235.The diameter of lenticule 235 can be essentially 20 μ m to 200 μ m.The area percentage that lenticule 235 occupies be basically blooming 200 the total area 80% to 90%.The area percentage of lenticule 235 can be greater than 90%.
As shown in Figure 5, first projection 230 can be the array of biconvex lens.Biconvex lens can adopt the tunnel form, and in this tunnel form, the inside of biconvex lens is full of.Diffusion of light, refraction or focusing can be depended on the pitch and the height of each biconvex lens.
As shown in Figure 6, first projection 230 can be the diffusion unit.First projection 230 can comprise a plurality of pearls 238, and the light that pearl 238 can diffusion be produced by light source.
As shown in Figure 7, first projection 230 can comprise resin 237 and a plurality of pearl 238.Resin 237 can be an acryl resin.Pearl 238 can comprise at least one in polymethylmethacrylate (PMMA), polystyrene and the silicon.First projection 230 can comprise 1 to 10 part the pearl 238 by weight based on resin 237.The mean particle dia of the pearl 238 in resin 237 can be uneven.The shape of pearl 238 can be circle, ellipse, snowman and inhomogeneous circle, but is not limited to this.
Therefore, because blooming 200 is included in a plurality of pearls 238 of first protruding 230 inside, the light that can diffusion produces by light source.
Though described first projection 230 above, be not limited to this with triangular-section.First projection 230 can have above-mentioned multiple shape and comprise a plurality of pearls.
Fig. 8 is the sectional view according to the blooming 300 of another exemplary embodiment.
As shown in Figure 8, blooming 300 can comprise reflective polarizer films 310, first undercoat 320 below reflective polarizer films 310 and first projection 330 on reflective polarizer films 310.
Be different from first undercoat, 220, the first undercoats 320 shown in Fig. 1 to 7 can be arranged on reflective polarizer films 310 below.
Because the structure of blooming shown in Figure 8 300 is identical with the structure of the blooming shown in Fig. 1 to 7 200, so it is simply described or omit fully description to it.
Fig. 9 is the sectional view according to the blooming 400 of another exemplary embodiment.
As shown in Figure 9, blooming 400 can comprise reflective polarizer films 410, at lip-deep first a undercoat 420a of reflective polarizer films 410, at another lip-deep second undercoat 420b of reflective polarizer films 410, at first protruding 430a on the first undercoat 420a and the second protruding 430b on the second undercoat 420b.
Because above referring to figs. 1 to 7 structures of having described reflective polarizer films 410, the first undercoat 420a, the first protruding 430a, so it is simply described or omit fully description to it.
Can handle by undercoat in the mode identical at another lip-deep second undercoat 420b of reflective polarizer films 410 and to form with the first undercoat 420a.The second undercoat 420b can use acrylic acid based polymer, ester group polymkeric substance or urethano polymkeric substance, and can use the risk of water miscible polymeric material to prevent to catch fire.
The second undercoat 420b can have basically 5nm to the thickness of 300nm.When the thickness of the second undercoat 420b is equal to or greater than 5nm, can solve the problem that is difficult to improve adhesion that is caused by the second extremely thin undercoat 420b.When the thickness of the second undercoat 420b is equal to or less than 300nm, can prevent from undercoat is handled, to produce the caking phenomenon that applies stain and polymeric material.
The second protection 430b on the second undercoat 420b can focus on the light that is produced by light source with diffusion.
The second protruding 430b can be made of a transparent polymer resin, this transparent polymeric resin can transmission from the light of external emission.The example of this transparent polymeric resin can comprise acryl resin, polycarbonate resin, acrylic resin, polyvinyl resin and pet resin.
The second protruding 430b can have the structure that is similar to the first protruding 430a.The second protruding 430b can be at least one in prism unit, microlens array, lenticular lens array or the diffusion unit.The second protruding 430b can comprise a plurality of pearl (not shown).
Though simply described blooming 400 with reference to figure 9, blooming 400 can comprise all structures according to the blooming of above-mentioned exemplary embodiment.
Figure 10 is the sectional view according to the blooming 500 of another exemplary embodiment.
As shown in figure 10, blooming 500 can comprise reflective polarizer films 510, the basement membrane on reflective polarizer films 510 520, in first undercoat 530 on the basement membrane 520 and first projection 540 on first undercoat 530.
Because referring to figs. 1 to 7 structures of having described reflective polarizer films 510, first undercoat 530 and first projection 540, so they are made simple description or omit description to it fully.
The light that basement membrane 520 can transmission be produced by light source.Therefore, basement membrane 520 can be made by light transmissive material that can transmitted light, and for example polyethylene terephthalate, polycarbonate, polypropylene, tygon, polystyrene and poly-epoxies material is any, but is not limited to this.
Therefore, because blooming 500 comprises reflective polarizer films 510, at the basement membrane on the reflective polarizer films 510 520, in first undercoat 530 on the basement membrane 520 and first projection 540 on first undercoat 530, so can guarantee physical strength, thermal stability and the flexibility of blooming 500.
Figure 11 is the sectional view according to the blooming 600 of another example embodiment.
As shown in figure 11, blooming 600 can comprise reflective polarizer films 610, at a lip-deep basement membrane 620 of reflective polarizer films 610, at the first undercoat 630a on the basement membrane 620, the first protruding 640a on the first undercoat 630a.Blooming 600 can also be included in another the lip-deep second undercoat 630b and the second protruding 640b on the second undercoat 630b of reflective polarizer films 610.
Because above referring to figs. 1 to 7 structures of having described reflective polarizer films 610, the first undercoat 630a and the first protruding 640a, so it is simply described or omit fully description to it.
Can handle by undercoat in the mode identical at another lip-deep second undercoat 630b of reflective polarizer films 610 and to form with the first undercoat 630a.
The second undercoat 630b can use acrylic acid based polymer, ester group polymkeric substance or urethano polymkeric substance, thereby and can use water soluble polymer material to prevent the risk of catching fire.
The second undercoat 630b can have basically 5nm to the thickness of 300nm.When the thickness of the second undercoat 630b is equal to or greater than 5nm, can solve the problem that is difficult to improve adhesion that causes by the second extremely thin undercoat 630b.When the thickness of the second undercoat 630b is equal to or less than 300nm, can prevent from undercoat is handled, to produce the caking phenomenon that applies stain and polymeric material.
The second protruding 640b on the second undercoat 630b can focus on the light that is produced by light source with diffusion.
The second protruding 640b can be by can transmission making from the transparent polymeric resin of the light of external emission.The example of transparent polymeric resin can comprise acryl resin, polycarbonate resin, acrylic resin, polyvinyl resin and polyethylene terephthalate.
The second protruding 640b can have the structure that is similar to the first protruding 640b.The second protruding 640b can be at least one in prism unit, microlens array, lenticular lens array or the diffusion unit.The second protruding 640b can comprise a plurality of pearl (not shown).
Though simply described blooming 600 with reference to Figure 11, blooming 600 can comprise all structures according to the blooming of above-mentioned example embodiment.
As mentioned above, in blooming shown in Figure 11 600, on reflective polarizer films or basement membrane, form undercoat, can strengthen the adhesion between reflective polarizer films or epilamellar projection and this reflective polarizer films or basement membrane by using undercoat to handle.
Therefore, can or have the blooming that uses in the LCD of excellent display quality according to above-mentioned exemplary embodiment at back light unit with uniform luminance.
Figure 12 illustrates the blooming 700 according to another exemplary embodiment, and Figure 13 is the enlarged drawing of the regional A of Figure 12, and Figure 14 is the planimetric map of Figure 12.
Shown in Figure 12 to 14, blooming 700 can comprise basement membrane 710, a plurality of protruding 720 and the reflective polarizer films below basement membrane 710 730 on basement membrane 710.A plurality of protruding 720 can comprise first projection, 721 and second projection 722.
More specifically, the light that can transmission produces by light source of basement membrane 710.Therefore, basement membrane 710 can be made by light transmissive material that can transmitted light, any in polyethylene terephthalate, polycarbonate, polypropylene, tygon, polystyrene and the poly-epoxies material for example, but be not limited to this.
A plurality of protruding 720 can form along the vertical linear ground of projection, but are not limited to this.
A plurality of protruding 720 can have different cross sectional shapes.For example, a plurality of cross sectional shapes of protruding 720 can be isosceles triangle and equilateral triangle.In addition, a plurality of protruding 720 can have identical cross sectional shape.
Though the height h1 of first projection 721 and width w1 can be different from the height h2 and the width w2 of second projection 722 respectively, the height h1 of first projection 721 and width w1 can equal the height h2 and the width w2 of second projection 722 respectively.In other words, can be provided with a plurality of protruding 720 regularly.
A plurality of protruding 720 can have basically 20 μ m to the thickness of 500 μ m.A plurality of protruding 720 can have the different in width in the scope between the 100 μ m at 1 μ m.
When being in 20 μ m respectively, a plurality of height of protruding 720 and width in the scope between 100 μ m the time, can improve a plurality of focus characteristics of protruding 720 to scope between the 500 μ m and 1 μ m.
As shown in figure 13, projection 720 can comprise paddy 725, converges each other in these paddy 725 place's projectioies 720.Depth d 1 and the d2 of paddy 725 can differ from one another.In addition, depth d 1 of paddy 725 and d2 can be equal to each other.
Reflective polarizer films 730 can transmission or the light that produced by light source of reflection.Reflective polarizer films 730 can comprise the ground floor 731 that comprises polymkeric substance and the second layer 732 adjacent with this ground floor 731.The second layer 732 can comprise polymkeric substance, and this polymkeric substance has the refractive index of the refractive index of the polymkeric substance that is different from ground floor 731.
The ground floor 731 and the second layer 732 can be alternately stacked each other.Ground floor 731 can be made by polymethylmethacrylate (PMMA), and the second layer 732 can be made by polyethylene terephthalate (PET).
Reflective polarizer films 730 can have the thickness of 120 μ m to 450 μ m basically.
Therefore, polarizing coating 730 transmissions that are reflected of the part of the light that light source produces, and a part of light is from the source reflection of reflective polarizer films 730 below this reflective polarizer films 730.Incorporated into by secondary reflection again towards the light of source reflection and to be mapped on the reflective polarizer films 730.Incide a part of penetration polarizing coating 730 of the light on the reflective polarizer films 730, the part of incident light is by the secondary reflection again of the light source below 730 from reflective polarizer films 730 towards reflective polarizer films.
In other words, because use the principle of the polarization of polarization by the molecule transmission different directions of orientated polymer in one direction and reflection equidirectional, by the alternately laminated each other reflective polarizer films 730 that forms of the polymeric layer that each is had different refractivity, so can improve the efficient of the light that produces by light source.
Blooming 700 can also be included in the adhesion layer 740 between basement membrane 710 and the reflective polarizer films 730.Adhesion layer 740 can be attached to reflective polarizer films 730 with basement membrane 710.Adhesion layer 740 can be made by acryl resin.
As mentioned above,, can improve the efficient of the light of light source generation, and pass through projection 720 light of refract light source generation brokenly, can prevent light interference phenomena because blooming 700 comprises a plurality of protruding 720 and reflective polarizer films 730 of irregular alignment.Thus, can improve the sharpness of image.
To describe the multiple structure of blooming below in detail.Though can not describe the explanation about projection below, projection can comprise the structure of the projection of above-mentioned exemplary embodiment.
Figure 15 to 19 illustrates the blooming 800 according to another exemplary embodiment.
Shown in Figure 15 to 19, blooming 800 can comprise basement membrane 810, a plurality of protruding 820 and the reflective polarizer films below basement membrane 810 830 on basement membrane 810.A plurality of protruding 820 can comprise first projection, 821 and second projection 822.The height of first projection 821 can be different from the height of second projection 822.
A plurality of protruding 820 can form continuous curve.More specifically, a plurality of protruding 820 can form with the form of zigzag, and wherein right side and left side are at random.A plurality of protruding 820 average level amplitude can be in the scope between 1 μ m and the 20 μ m basically.
In the interval of projection between 820 can be in scope between 1 μ m and the 10 μ m basically.
The degree of depth of paddy 825 can differ from one another.In addition, the degree of depth of paddy 825 can be equal to each other.
As mentioned above, the average level amplitude of projection 820 or paddy 825 can change randomly, and the degree of depth of the height of projection 820 or paddy 825 can rule or change brokenly.
Blooming 800 can also be included in the adhesion layer 840 between basement membrane 810 and the reflective polarizer films 830.Adhesion layer 840 can be attached to reflective polarizer films 830 with basement membrane 810.Adhesion layer 840 can be made by acryl resin.
Shown in Figure 17 and 18, blooming 800 can also be included in epilamellar first undercoat.
Can handle by undercoat and obtain first undercoat 850.Handle and carry out undercoat and handle by on common polymer film, carrying out undercoat, and can improve adhesion between polymer film and ultraviolet ray (UV) resin thus.Can in handling, undercoat use acrylic acid based polymer, ester group polymkeric substance or urethano polymkeric substance.Water miscible polymeric material can in handling, be used undercoat, with the risk that prevents to catch fire.Can use applicator on the basement membrane of wanting undercoat to handle, to apply above-mentioned polymeric material and carry out the undercoat processing.
Therefore, can prevent that projection 820 is subjected to the infringement that the physics between the optical sheet on blooming 800 and the blooming 800 contacts.In addition, can improve the picture quality of LCD.
Figure 20 and 21 illustrates the blooming 900 according to another example embodiment.
Shown in Figure 20 and 21, blooming 900 can comprise the reflective polarizer films 930 below basement membrane 910, a plurality of protruding 920 and the basement membrane 910 on basement membrane 910.A plurality of protruding 920 can comprise first projection, 921 and second projection 922.The height of first projection 921 can be different from the height of second projection 922.
Blooming 900 can also be included in the adhesion layer 940 between basement membrane 910 and the reflective polarizer films 930.Adhesion layer 940 can be attached to reflective polarizer films 930 with basement membrane 910.Adhesion layer 940 can be made by acryl resin.
A plurality of protruding 920 can also comprise a plurality of first pearls 950.
More specifically, a plurality of protruding 920 can comprise first pearl 950 of 1 to 10 number percent by weight.
The mean particle dia of first pearl 950 can be inhomogeneous.First pearl 950 can be distributed in unevenly in the projection 920.All first pearls 950 can be distributed in the projection 920, on the surface of projection 920, not expose first pearl 950.
As mentioned above, because blooming 900 is included in first pearl 950 of protruding 920 inside, can improve the diffuse properties of blooming 900.Thus, can increase the visual angle.
Figure 22 and 23 illustrates the blooming 1000 according to another example embodiment.
Shown in Figure 22 and 23, blooming 1000 can comprise basement membrane 1010, a plurality of protruding 1020 and the reflective polarizer films below basement membrane 1,010 1030 on basement membrane 1010.A plurality of protruding 1020 can comprise first projection, 1021 and second projection 1022.The height of first projection 1021 can be different from the height of second projection 1022.
Blooming 1000 can also be included in the adhesion layer 1040 between basement membrane 1010 and the reflective polarizer films 1030.Adhesion layer 1040 can be attached to reflective polarizer films 1030 with basement membrane 1010.This adhesion layer 1040 can be made by acryl resin.
Blooming 1000 can also be included in the protective seam 1050 below the reflective polarizer films 1030.Protective seam 1050 can comprise a plurality of second pearls 1052.Protective seam 1050 can be the laying that can improve the thermal resistance of blooming 1000, the diffusion of light unit that perhaps can diffusion be produced by light source.
More specifically, protective seam 1050 can comprise resin 1051 and a plurality of second pearls 1052 of distribution in resin 1051.Resin 1051 can use the transparent propene acidic group resin with excellent thermal resistance and superior mechanical properties.The example of acrylic based resin can comprise polyacrylic acid or polymethylmethacrylate.Second pearl 1052 can by with resin 1051 identical materials or with resin 1051 different material make.Protective seam 1050 can comprise based on resin 1,051 second pearl 1052 of 10 to 50 number percents by weight.
The size of second pearl 1052 can depend on the thickness of basement membrane 1010, and can be in 1 μ m basically in the scope between the 10 μ m.Second pearl 1052 can have substantially the same size, and can be distributed in resin 1051 inside regularly.In addition, second pearl 1052 can be of different sizes, and can be distributed in resin 1051 inside brokenly.Second pearl 1052 can be identical with first pearl 952 shown in Figure 18 and 19, and second pearl 1052 can be different from first pearl 950.
Below description is comprised according to the back light unit of the blooming of above-mentioned exemplary embodiment and the LCD that comprises this back light unit.
Figure 24 and 25 is used to explain decomposition diagram and the sectional view that comprises according to the structure of the back light unit of the blooming of exemplary embodiment.Figure 24 and 25 illustrates the peripheral type back light unit.
Usually, LCD can comprise liquid crystal panel and the back light unit of light is provided to this liquid crystal panel.
As shown in Figure 24 and 25, back light unit 1100 can comprise light source 1120 and blooming 1130.Back light unit 1100 can also comprise optical plate 1140, reflecting plate 1150, bottom 1160 and mould bases 1170.
The light that the driving power that light source 1120 can use to be provided from the outside produces light and can launch generation.
At least one light source 1120 can be arranged on an end of this optical plate 1140 along the long axis direction of optical plate 1140.At least one light source 1120 can be arranged on the two ends of optical plate 1140.Can be directly incident on the optical plate 1140 from the light of light source 1120 emissions.Perhaps, can be from the light of light source 1120 emission, and can incide then on the optical plate 1140 from light source shell 1122 reflections, this light source shell 1122 is around the part of light source 1120, for example around about 3/4 of the external peripheral surface of light source 1120.
Blooming 1130 can be arranged on the optical plate 1140.Blooming 1130 can focus on from the light of light source 1120 emissions.
Reflecting plate 1150 can be arranged on below the optical plate 1140.Reflecting plate 1150 reflected light that can make progress, this light is launched downwards via optical plate 1140 then from light source 1120 emissions.
The shape of mould bases 1170 can roughly be a rectangle.Mould bases 1170 can be fastened to bottom 1160 from the upside of bottom 1160 with the upper and lower formula.
Figure 26 and 27 is used to explain decomposition diagram and the sectional view that comprises according to the structure of the back light unit of the blooming of exemplary embodiment.
Though Figure 26 and 27 illustrates direct type back light unit, the present invention is not limited to this.Because all identical the change of the parts that Figure 26 and the back light unit shown in 27 and the back light unit shown in Figure 24 and 25 cause except the position of light source and according to the change of light source position, so it is simply described or omit fully description to it.
Usually, LCD can comprise liquid crystal panel and the back light unit of light is provided to this liquid crystal panel.
Shown in Figure 26 and 27, back light unit 1200 can comprise light source 1220 and blooming 1230.Back light unit 1200 can also comprise reflecting plate 1250, bottom 1260, mould bases 1270 and diffusing panel 1280.
At least one light source 1220 can be arranged on below the diffusing panel 1280.Thus, the light from light source 1220 emissions can be directly incident on the diffusing panel 1280.
Blooming 1230 can be arranged on the diffusing panel 1280.Blooming 1230 can focus on from the light of light source 1220 emissions.
Diffusing panel 1280 can be arranged between light source 1220 and the blooming 1230, and the light of diffusion from light source 1220 emissions that can make progress.Diffusing panel 1280 can make the shape of light source 1220 not be defined, and further diffused light.
Figure 28 and 29 is decomposition diagram and the sectional views that are used to explain the structure of LCD.Though the LCD 1300 shown in Figure 28 and 29 comprises the back light unit shown in Figure 22 and 23, is not limited to this.For example, LCD 1300 can comprise the back light unit shown in Figure 26 and 27.
Because described the back light unit 1310 shown in Figure 28 and 29 in the above, so it is made simple description or omits description to it fully with reference to Figure 24 and 25.
As shown in Figure 28 and 29, LCD 1300 can use the photoelectric characteristic of liquid crystal to come display image.
Back light unit 1310 can be arranged on below the liquid crystal panel 1410, and light can be offered liquid crystal panel 1410.
Back light unit 1310 can comprise light source 1320 and blooming 1330.Back light unit 1310 can also comprise optical plate 1340, reflecting plate 1350, bottom 1360 and mould bases 1370.
Colored optical filtering substrates 1412 can be implemented in the color of the image that shows on the liquid crystal panel 1410.Colored optical filtering substrates 1412 can comprise the colorful optical filter array of form of film, and the colorful optical filter array of this form of film is located at by on the substrate of making such as the transparent material of glass or plastics.For example, colored optical filtering substrates 1412 can comprise redness, green and blue color filter.Upper polarizing sheet can be arranged on the colored optical filtering substrates 1412.
Thin film transistor base plate 1414 can be electrically connected on the tellite 1318 by drive membrane 1316, on this tellite 1318 a plurality of circuit blocks is installed.Thin film transistor base plate 1414 can will be applied to liquid crystal by the driving voltage that tellite 1318 provides in response to the drive signal that is provided by tellite 1318.
Thin film transistor base plate 1414 can be included in by thin film transistor (TFT) and pixel electrode on another substrate of making such as the transparent material of glass or plastics.Lower polarizing sheet can be arranged on below the thin film transistor base plate 1414.
Previous embodiment and advantage only are exemplary and be not interpreted as restriction the present invention.Can easily this enlightenment be applied to the equipment of other types.It is illustrative that the description of front embodiment is intended to, and does not limit the scope of claim.To those skilled in the art, a lot of replacements, modifications and variations are conspicuous.
Claims (20)
1. blooming comprises:
Reflective polarizer films;
First undercoat, described first undercoat is positioned on the described reflective polarizer films; And
First projection, described first projection is positioned on described first undercoat.
2. blooming according to claim 1 further is included in second undercoat below the described reflective polarizer films, and the thickness of described second undercoat is in the scope between 5nm and the 300nm basically.
3. blooming according to claim 1 further is included in the protective seam on the described reflective polarizer films.
4. blooming according to claim 1, wherein, the thickness of described first undercoat is in the scope between 5nm and the 300nm basically.
5. blooming according to claim 1, wherein, described first projection is at least one in microlens array, lenticular lens array, diffusion unit and the prism unit.
6. blooming according to claim 1, wherein, described first projection comprises a plurality of pearls.
7. blooming according to claim 1, wherein, described reflective polarizer films comprises the alternately laminated each other ground floor and the second layer, and the refractive index of described ground floor is different from the refractive index of the described second layer.
8. blooming according to claim 1 further is included in the basement membrane on the described reflective polarizer films,
Wherein, described first undercoat is arranged on the described basement membrane.
9. liquid crystal display device comprises:
Light source;
Blooming, described blooming are positioned on the described light source, and described blooming comprises:
Reflective polarizer films;
Basement membrane, described basement membrane are positioned on the described reflective polarizer films;
First undercoat, described first undercoat is positioned on the described basement membrane;
First projection, described first projection are positioned on described first undercoat; And
Liquid crystal panel, described liquid crystal panel is positioned on the described blooming.
10. liquid crystal display device according to claim 9, wherein, the thickness of described first undercoat is in the scope between 5nm and the 300nm basically.
11. blooming comprises:
Reflective polarizer films;
Basement membrane, described basement membrane are positioned on the described reflective polarizer films; And
A plurality of projectioies, described a plurality of projectioies are positioned on the described basement membrane, and described projection comprises first projection and second projection, and the height of described first projection is different from the height of described second projection.
12. blooming according to claim 11, wherein, described projection vertically has a differing heights along described projection.
13. blooming according to claim 11 further is included in described epilamellar first undercoat.
14. blooming according to claim 13, wherein, the thickness of described first undercoat is in the scope between 5nm and the 300nm basically.
15. blooming according to claim 11, wherein, described projection comprises a plurality of paddy, and the degree of depth of described paddy differs from one another.
16. blooming according to claim 11, wherein, the interval between described projection is in the scope between 1 μ m and the 10 μ m basically.
17. blooming according to claim 11, wherein, described projection comprises a plurality of peaks, and the height random at described peak ground changes.
18. blooming according to claim 11, wherein, described a plurality of projectioies comprise a plurality of first pearls.
19. blooming according to claim 11 further is included in the protective seam below the described reflective polarizer films, described protective seam is diffusion unit or laying.
20. blooming according to claim 19, wherein, described protective seam comprises resin and a plurality of second pearl.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070121132 | 2007-11-26 | ||
| KR1020070121132A KR100957496B1 (en) | 2007-11-26 | 2007-11-26 | Reflective Polarized Light Film, Back Light Unit And Liquid Crystal display Device Comprising the same |
| KR1020070121126 | 2007-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101446656A true CN101446656A (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102159572A Pending CN101446656A (en) | 2007-11-26 | 2008-09-12 | Optical film and liquid crystal display including the optical film |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100957496B1 (en) |
| CN (1) | CN101446656A (en) |
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| KR20090054331A (en) | 2009-05-29 |
| KR100957496B1 (en) | 2010-05-14 |
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Application publication date: 20090603 |