CN101592822B - Optical sheet and liquid crystal display including the same - Google Patents
Optical sheet and liquid crystal display including the same Download PDFInfo
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- CN101592822B CN101592822B CN2008101858090A CN200810185809A CN101592822B CN 101592822 B CN101592822 B CN 101592822B CN 2008101858090 A CN2008101858090 A CN 2008101858090A CN 200810185809 A CN200810185809 A CN 200810185809A CN 101592822 B CN101592822 B CN 101592822B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
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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
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips
Abstract
The invention discloses an optical sheet and a liquid crystal display including the same. The optical sheet includes a reflective polarizing film (110), a first adhesive layer (130) on one surface of the reflective polarizing film, and a first diffusion layer (120) on the first adhesive layer. The first adhesive layer has first (T1) and second (T2) thicknesses. The first diffusion layer includes a first light transmitting material (121) and a plurality of first diffusion particles (122). At least one of the first diffusion particles has a portion protruding above a surface of the first light transmitting material, and a height of the portion, h1, substantially satisfies the following equation: 0.1D1 is less than or equal to h1 and h1 is less than or equal to 0.7D1, where D1 is a diameter of the at least one of the first diffusion particles. The first thickness, T1, and the second thickness, T2, substantially satisfy the following equation: 10 nm is less than or equal to |T1-T2| and |T1-T2| is less than or equal to 2 microns.
Description
Technical field
The LCD that exemplary embodiment of the present invention relates to a kind of optical sheet and comprises described optical sheet.
Background technology
Recently, the type of field of display that can show the information of various electric signal visually increases fast.Along with this growth, the various flat-panel monitors of (for example Bao side, in light weight and low-power consumption) have been introduced and have had good characteristic.Correspondingly, traditional cathode ray tube (CRT) is just replaced fast by flat-panel monitor.
The example of these flat-panel monitors comprises LCD (LCD), plasma display (PDP), Field Emission Display (FED) and electroluminescent display (ELD).Because high-contrast and good motion picture display characteristic, so LCD has been used as display panel, the monitor of personal computer, the TV Monitor of notebook energetically.
LCD can be classified as the light-receiving display usually.LCD comprises the panel of LCD of display image and is positioned under the panel of LCD so that the back light unit of light to be provided to panel of LCD.
Back light unit comprises light source and optical sheet.Optical sheet typically comprises diffusion sheet, prismatic lens or screening glass.
Reduce if back light unit offers the homogeneity of brightness of the light of panel of LCD, then the display quality of LCD descends.In correlation technique, diffusion sheet attempts making that light spreads equably on the whole surface of the viewing area of panel of LCD, thereby the brightness uniformity that prevents light reduces.Yet, only use diffusion sheet to be difficult to guarantee high light diffusing and brightness uniformity.
Summary of the invention
Exemplary embodiment of the present invention provides a kind of optical sheet and a kind of LCD that comprises the optical sheet that can improve display quality that can improve optical characteristics.
The supplementary features of exemplary embodiment of the present invention and advantage will be set forth in the following description, and partly will become clear from describe, and perhaps can understand by the practice of exemplary embodiment of the present.To realize and obtain purpose and other advantage of exemplary embodiment of the present by the structure of in the instructions of being write and claim and accompanying drawing, specifically noting.
On the one hand, have a kind of optical sheet, it comprises: reflection polarizing film; First adhesive linkage, it is on a surface of described reflection polarizing film, and described first adhesive linkage has first thickness and second thickness; And first diffusion layer, it is on described first adhesive linkage, described first diffusion layer comprises first light transmitting material and a plurality of first diffusion particle, wherein, in described a plurality of first diffusion particle at least one has the part of protruding on the surface of described first light transmitting material, and the height h1 of described part satisfies following formula: 0.1D1≤h1≤0.7D1 basically, wherein, D1 is at least one the diameter in described a plurality of first diffusion particle, wherein, described first thickness T 1 and described second thickness T 2 satisfy basically following formula: 10nm≤| T1-T2|≤2 μ m.
On the other hand, have a kind of LCD, it comprises: light source; Optical sheet, it is on described light source; And panel of LCD, it is on described optical sheet, and wherein, described optical sheet comprises: reflection polarizing film; First adhesive linkage, it is on a surface of described reflection polarizing film, and described first adhesive linkage has first thickness and second thickness; And first diffusion layer, it is on described first adhesive linkage, described first diffusion layer comprises first light transmitting material and a plurality of first diffusion particle, wherein, in described a plurality of first diffusion particle at least one has the part of protruding on the surface of described first light transmitting material, and the height h1 of described part satisfies following formula: 0.1D1≤h1≤0.7D1 basically, wherein, D1 is at least one the diameter in described a plurality of first diffusion particle, wherein, described first thickness T 1 and described second thickness T 2 satisfy basically following formula: 10nm≤| T1-T2|≤2 μ m.
Should be appreciated that aforementioned general description and following detailed description are exemplary and indicative, it aims to provide the further explanation to desired embodiments of the invention.
Description of drawings
Be included to provide further understanding of the present invention and be integrated in the instructions and the accompanying drawing that constitutes the part of instructions illustrates embodiments of the invention, and be used to explain principle of the present invention together with the description.In the accompanying drawings:
Fig. 1 is the sectional view of optical sheet according to an exemplary embodiment of the present invention;
Fig. 2 is the zoomed-in view of regional X shown in Figure 1;
Fig. 3 is the sectional view of the optical sheet of another exemplary embodiment according to the present invention;
Fig. 4 is the zoomed-in view of regional Y shown in Figure 3; And
Fig. 5 A to Fig. 5 C illustrates LCD according to an exemplary embodiment of the present invention.
Embodiment
Now will be in detail with reference to embodiments of the invention, its example is shown in the drawings.
Fig. 1 is the sectional view of optical sheet 100 according to an exemplary embodiment of the present invention, and Fig. 2 is the zoomed-in view of regional X shown in Figure 1.
As shown in Figure 1, optical sheet 100 can comprise reflection polarizing film 110 and first diffusion layer 120 on reflection polarizing film 110.First diffusion layer 120 can comprise first light transmitting material 121 and a plurality of first diffusion particle 122 and 123.Some first diffusion particle 122 can be embedded in the light transmitting material 121.In addition, some first diffusion particle 123 can be exposed to light transmitting material 121 outsides.
Reflection polarizing film 110 can carry out transmission or reflection to the light from light source.Reflection polarizing film 110 can comprise: ground floor 111, and it is formed by polymkeric substance; And the second layer 112, it is adjacent to ground floor 111 and places.The second layer 112 can be formed by the polymkeric substance with refractive index different with the refractive index of the polymkeric substance that forms ground floor 111.
Reflection polarizing film 110 can have the structure that wherein ground floor 111 and the second layer 112 repeatedly alternately pile up.Ground floor 111 can be formed by polymethylmethacrylate (PMMA), and the second layer 112 can be formed by polyester.
From a part of light of light source by reflection polarizing film 110 transmissions, and from another part light of light source towards the source reflection under reflection polarizing film 110., and incided on the reflection polarizing film 110 by secondary reflection again towards the light of source reflection.Incide a part of light on the reflection polarizing film 110 by reflection polarizing film 110 transmissions, and incide another part light on the reflection polarizing film 110 once more towards the source reflection under reflection polarizing film 110.
In other words, because reflection polarizing film 110 has the structure that wherein ground floor 111 and the second layer 112 repeatedly alternately pile up, so reflection polarizing film 110 can utilize following principle to improve efficient from the light of light source: the molecule of polymkeric substance is directed in one direction, carry out transmission with polarisation light, and the polarisation light of the direction identical with the orientation direction of molecule is reflected the direction different with the orientation direction of molecule.
According to the size of display device, reflection polarizing film 110 can have the thickness of 100 μ m to 300 μ m.When the thickness of reflection polarizing film 110 is equal to or greater than 100 μ m, can utilize polarisation and principle of reflection to improve the efficient of light.When the thickness of reflection polarizing film 110 is equal to or less than 300 μ m, can realize the optical sheet that the side is thin.
First light transmitting material 121 that forms first diffusion layer 120 can use unsaturated polyester (UP), methyl methacrylate, Jia Jibingxisuanyizhi, the methacrylic acid isobutyl, n-BMA, methacrylic acid normal-butyl methyl ester, acrylic acid, methacrylic acid, methacrylic acid hydroxyl ethyl ester, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, n-methylolacrylamide, glycidyl methacrylate, the acrylic acid ethyl ester, the acrylic acid isobutyl, n-butylacrylate, based on acrylic acid material (2-EHA polymkeric substance for example, the 2-EHA multipolymer, or 2-EHA terpolymer), material based on polyurethane, material based on epoxy resin, material based on melamine, polycarbonate, and polystyrene, but be not limited thereto.
In the middle of first diffusion particle 122 in first diffusion layer 120 and 123 any one can be pearl shape.In first diffusion particle 122 and 123 any one can be formed by the material selected in the group of from comprise polymethylmethacrylate (PMMA), polystyrene, silicon and combination.
First diffusion particle 122 that distributes on first light transmitting material 121 and 123 diameter can be skimble-scamble.
Some first diffusion particle 122 can be formed in first light transmitting material 121, and some first diffusion particle 123 can be exposed to first light transmitting material, 121 outsides.
When the diameter of first diffusion particle 122 and 123 was big, first diffusion layer 120 must be thick, so that guarantee the light diffusing of optical sheet 100.Like this, when first diffusion particle 122 and 123 is big, be difficult to make the thin optical sheet 100 in side.Therefore, when the diameter of first diffusion particle 122 and 123 is equal to or less than 10 μ m, the thin side of optical sheet 100 can be implemented to the degree of the light diffusing that does not reduce optical sheet 100.
Correspondingly, comprise the following operation of back light unit of optical sheet according to an exemplary embodiment of the present invention.
The light that is produced by light source incides on the optical sheet.Incide first diffusion particle collision of a part of light on the optical sheet and first diffusion layer, and the travel path of light changes.Incide the emitting surface that another part light on the optical sheet passes first diffusion layer, to advance towards panel of LCD.
With the light and other first diffusion particle collision that is adjacent to first diffusion particle that bumps of first diffusion particle collision, and the travel path of light changes once more.A part of light that the travel path change is twice passes the emitting surface of first diffusion layer, to advance towards panel of LCD.Travel path changes twice another part light and the collision of first diffusion particle, and the travel path of light changes.
At last, the light that passes the emitting surface of first diffusion layer incides on the panel of LCD equably.
Optical sheet 100 may further include first adhesive linkage 130 between the reflection polarizing film 110 and first diffusion layer 120 according to an exemplary embodiment of the present invention.
Can be by first light transmitting material 121 being mixed with first diffusion particle 122 and 123 and on reflection polarizing film 110, applying or apply this potpourri and on reflection polarizing film 110, form first diffusion layer 120.
Otherwise, can form first light transmitting material 121 and first diffusion particle 122 and 123 with the form of film by using extrusion molding method or injecting molded method, use bonding agent that it is sticked on the reflection polarizing film 110 then, thereby on reflection polarizing film 110, form first diffusion layer 120., first adhesive linkage 130 can be coated in reflection polarizing film 110 on, to form first diffusion layer 120 thereafter.
First adhesive linkage 130 can be by from comprising based on acrylic acid bonding agent, forming based on the material of selecting the bonding agent of rubber, the group based on the bonding agent of silicon and combination thereof.
Example based on acrylic acid bonding agent comprises alkyl acrylate (for example acrylic acid ethyl ester, butyl acrylate cores, acrylic acid pentyl ester, 2-EHA, acrylic acid octyl group ester, acrylic acid cyclohexyl ester and benzyl acrylate) and alkyl methacrylate (for example butyl methacrylate, methacrylic acid 2-ethylhexyl, methacrylic acid cyclohexyl ester and benzyl methacrylate).
Bonding agent based on rubber can comprise segmented copolymer, and the block segmented copolymer comprises that natural rubber, isoprene rubber, styrene butadiene rubbers, reclaimed rubber, Oppanol, styrene-isoprene-phenylethene rubber and s-B-S rubber are as principal ingredient.
Comprise based on the material of dimethyl siloxane with based on the material of diphenyl siloxane based on the example of the bonding agent of silicon.
First adhesive linkage 130 can comprise each other relative first surface 131a and second surface 131b.Among first surface 131a and the second surface 131b at least one can have curved surface.
Consider transmitance and adhesive properties, the thickness of first adhesive linkage 130 can be 1 μ m to 10 μ m basically, but is not limited thereto.
The thickness of first adhesive linkage 130 can be meant peak and the paddy of distance between the second surface 131b and first surface 131a and the mean value of the distance between the second surface 131b of first surface 131a.
Vertical range T1 between the primary importance of first surface 131a and the second surface 131b can be different with the vertical range T2 between the second surface 131b with the second place of first surface 131a.Vertical range T1 and T2 can satisfy following formula: 10nm≤| T1-T2|≤2 μ m.From Fig. 1 as seen, vertical range T1 and T2 are the distances along the vector on the table plane that is basically perpendicular to reflection polarizing film 110.
Following table 1 expression is according to the diffusion effect and the brightness of the optical sheet 100 of the relation between vertical range T1 and the T2.In following table 1, *, zero and ◎ represent poor, good and excellent in performance characteristic respectively.
Table 1
| |T1-T2|(μm) | Diffusion effect | Brightness |
| 0.005 | × | ◎ |
| 0.01 | ○ | ◎ |
| 0.03 | ○ | ◎ |
| 0.05 | ○ | ○ |
| 0.1 | ○` | ○ |
| 0.5 | ○ | ○ |
| 1 | ◎ | ○ |
| 2 | ◎ | ○ |
| 5 | ◎ | × |
Shown in above table 1, when vertical range T1 and T2 satisfy following formula: 10nm≤| during T1-T2|, because a lip-deep curved surface of first adhesive linkage 130, can spread efficiently from the light of light source.When vertical range T1 and T2 satisfy following formula: | during T1-T2|≤2 μ m, can prevent that the brightness that the big difference in height owing to first adhesive linkage 130 causes from reducing.
As shown in Figure 2, at least one in a plurality of first diffusion particles (for example first diffusion particle 123) can have the part of protruding on the surface of first light transmitting material 121.The height h1 of projection can satisfy following formula: 0.1D1≤h1≤0.7D1 basically, and wherein, D1 is at least one the diameter in described a plurality of first diffusion particle.
Following table 2 expressions are according to the diffusivity and the released state of the optical sheet 100 of the height h1 of projection.In following table 2, *, zero and ◎ characteristic poor, good and outstanding state respectively.
Table 2
| The height h1 of projection | Diffusivity | Released state |
| 0.0D1 | × | ◎ |
| 0.1D1 | ○ | ◎ |
| 0.2D1 | ○ | ◎ |
| 0.3D1 | ◎ | ◎ |
| 0.4D1 | ◎ | ◎ |
| 0.5D1 | ◎ | ◎ |
| 0.6D1 | ◎ | ◎ |
| 0.7D1 | ◎ | ○ |
| 0.8D1 | ◎ | × |
| 0.9D1 | ◎ | × |
| 1.0D1 | ◎ | × |
As above shown in the table 2, when the height h1 of projection is equal to or greater than 0.1D1, can improve diffusivity.When the height h1 of projection is equal to or less than 0.7D1, keeping the improved diffusible while, can prevent the problem that first diffusion particle 123 separates from first diffusion layer 120 easily.
Because the height h1 of the projection of first diffusion particle 123 is in the above scope, so can prevent in manufacture process by the surperficial undue damage that exposes first diffusion particle 123 and cause to optical sheet 100 from first light transmitting material 121.In addition, the damage of optical sheet 100 that can be by preventing to use first diffusion particle 123 improves the q﹠r of optical sheet 100, and in addition, can improve the optical efficiency of back light unit and the display quality and the reliability of LCD.
Fig. 3 is the sectional view of the optical sheet 200 of another exemplary embodiment according to the present invention, and Fig. 4 is the zoomed-in view of regional Y shown in Figure 3.
As shown in Figure 3 and Figure 4, optical sheet 200 can comprise reflection polarizing film 210, at first adhesive linkage 230 on the reflection polarizing film 210 and first diffusion layer 220 on first adhesive linkage 230.First diffusion layer 220 can comprise first light transmitting material 221 and a plurality of first diffusion particle 222.Some first diffusion particle 252 can be embedded in first transmission material 221.And some first diffusion particle 253 can be exposed to first transmission material, 221 outsides.
Since more than see figures.1.and.2 and described reflection polarizing film 210, first diffusion layer 220 and first adhesive linkage 230, therefore the descriptions thereof are omitted.
Second light transmitting material 251 that forms second diffusion layer 250 can use unsaturated polyester (UP), methyl methacrylate, Jia Jibingxisuanyizhi, the methacrylic acid isobutyl, n-BMA, methacrylic acid normal-butyl methyl ester, acrylic acid, methacrylic acid, methacrylic acid hydroxyl ethyl ester, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, n-methylolacrylamide, glycidyl methacrylate, the acrylic acid ethyl ester, the acrylic acid isobutyl, n-butylacrylate, based on acrylic acid material (2-EHA polymkeric substance for example, the 2-EHA multipolymer, or 2-EHA terpolymer), material based on polyurethane, material based on epoxy resin, material based on melamine, polycarbonate, and polystyrene, but be not limited thereto.
In the middle of second diffusion particle 252 in second diffusion layer 250 and 253 any one can be pearl shape.In second diffusion particle 252 and 253 any one can by one from comprise polymethylmethacrylate (PMMA), polystyrene, silicon and the combination group in selected material form.
It can be uneven being distributed in second diffusion particle 252 in second light transmitting material 251 and 253 diameter.
Some second diffusion particle 252 can be formed in second light transmitting material 251, and some second diffusion particle 253 can be exposed to second light transmitting material, 251 outsides.
When the diameter of second diffusion particle 252 and 253 when big (for example＞10 μ m), second diffusion layer 250 must form thicklyer, so that guarantee the light diffusing of optical sheet 200, therefore is difficult to make the thin optical sheet 200 in side.Therefore, when the diameter of second diffusion particle 252 and 253 is equal to or less than 10 μ m, the thin side of optical sheet 100 can be implemented to the degree of the light diffusing that does not reduce optical sheet 200.
Being used for that reflection polarizing film 210 is adhered to second adhesive linkage 240 of second diffusion layer 250 can be identical with first adhesive linkage 230.
Second adhesive linkage 240 can be by from comprising based on acrylic acid bonding agent, forming based on the material of selecting the bonding agent of rubber, the group based on the bonding agent of silicon and combination thereof.
Example based on acrylic acid bonding agent comprises alkyl acrylate (for example acrylic acid ethyl ester, butyl acrylate cores, acrylic acid pentyl ester, 2-EHA, acrylic acid octyl group ester, acrylic acid cyclohexyl ester and benzyl acrylate) and alkyl methacrylate (for example butyl methacrylate, methacrylic acid 2-ethylhexyl, methacrylic acid cyclohexyl ester and benzyl methacrylate).
Bonding agent based on rubber can comprise segmented copolymer, comprises that natural rubber, isoprene rubber, styrene butadiene rubbers, reclaimed rubber, Oppanol, styrene-isoprene-phenylethene rubber and s-B-S rubber are as principal ingredient.
Comprise based on the material of dimethyl siloxane with based on the material of diphenyl siloxane based on the example of the bonding agent of silicon.
Second adhesive linkage 240 can comprise the respect to one another the 3rd surperficial 241a and the 4th surperficial 241b.Among the 3rd surperficial 241a and the 4th surperficial 241b at least one (for example the 4th surperficial 241b) can have curved surface.
Consider transmitance and adhesive properties, the thickness of second adhesive linkage 240 can be 1 μ m to 10 μ m basically, but is not limited thereto.
The thickness of second adhesive linkage 240 can be meant peak and the paddy of distance between the 3rd surperficial 241a and the 4th surperficial 241b and the mean value of the distance between the 3rd surperficial 241a of the 4th surperficial 241b.
Vertical range T3 between the primary importance of the 4th surperficial 241b and the 3rd surperficial 241a can be different with the vertical range T4 between the 3rd surperficial 241a with the second place of the 4th surperficial 241b.Similar to first adhesive linkage 230, vertical range T3 and T4 can satisfy following formula: 10nm≤| T3-T4|≤2 μ m.
When vertical range T3 and T4 satisfy following formula: 10nm≤| during T3-T4|, because a lip-deep curved surface of second adhesive linkage 240, can spread efficiently from the light of light source.When vertical range T3 and T4 satisfy following formula: | during T3-T4|≤2 μ m, because the big difference in height between the curved surface of second adhesive linkage 240 can prevent the reduction of brightness.
As shown in Figure 4, at least one in a plurality of second diffusion particles (for example second diffusion particle 253) can have the part of protruding on the surface of second light transmitting material 251.The height h2 of projection can satisfy following formula: 0.1D2≤h2≤0.7D2 basically, and wherein, D2 is described at least one the diameter in described a plurality of second diffusion particle.
When the height h2 of projection is equal to or greater than 0.1D2, can improve diffusivity.When the height h2 of projection is equal to or less than 0.7D2, keeping the improved diffusible while, can prevent the problem that second diffusion particle 253 separates from second diffusion layer 250 easily.
Fig. 5 A to Fig. 5 C is decomposition diagram and the sectional view that the configuration of LCD 500 according to an exemplary embodiment of the present invention is shown.LCD 500 shown in Fig. 5 A to Fig. 5 C comprises the marginal mode back light unit, but is not limited thereto.For example, LCD 500 can comprise the direct-type back light unit.Shown in Fig. 5 A to Fig. 5 C, LCD 500 can utilize the photoelectric characteristic of liquid crystal to come display image.
Back light unit 510 can be positioned under the panel of LCD 610, and can provide light to panel of LCD 610.
Back light unit 510 can comprise light source 520 and optical sheet 530.Back light unit 510 may further include light guide plate 540, reverberator 550, bottom 560 and mold frame 570.
At least one light source 520 can be positioned at a side of light guide plate 540 along the long axis direction of light guide plate 540.At least one light source 520 can be arranged in each side of the both sides of light guide plate 540.
Light from light source 520 can be directly incident on the light guide plate 540.Perhaps, can incide on the light guide plate 540 then from light shell outer cover 522 reflections from the light of light source 520 around the part of light source 520 (for example about 3/4 of the external peripheral surface of light source 520).
In described a plurality of first diffusion particle at least one can have the part of protruding on the surface of described first light transmitting material, and the height h1 of described part can satisfy following formula: 0.1D1≤h1≤0.7D1 basically, wherein, D1 is described at least one the diameter in described a plurality of first diffusion particle.First thickness T 1 and second thickness T 2 can satisfy basically following formula: 10nm≤| T1-T2|≤2 μ m.
In diffusion sheet 532 and the prismatic lens 531 at least one can be between light guide plate 540 and optical sheet 530, but is not limited thereto.
Panel of LCD 610 can be positioned on the mold frame 570.Panel of LCD 610 can be fixed by top cover 620, and top cover 620 is fixed to bottom 560 in top-down (top-down) mode.
The light that panel of LCD 610 can use the light source 520 by back light unit 510 to provide comes display image.
Panel of LCD 610 can comprise filter substrate 612 respect to one another and thin film transistor base plate 614, and wherein, liquid crystal is between filter substrate 612 and thin film transistor base plate 614.
Thin film transistor base plate 614 is electrically connected to printed circuit board 518 by drive membrane 516, and a plurality of circuit blocks are installed on the printed circuit board 518.The driving voltage that thin film transistor base plate 614 can provide printed circuit board 518 in response to the drive signal that is provided by printed circuit board 518 is applied to liquid crystal.
Thin film transistor base plate 614 can comprise thin film transistor (TFT) and the pixel electrode on another substrate made from transparent material (for example glass or plastics).Following Polarizer can be positioned under the thin film transistor base plate 614.
As mentioned above, optical sheet and comprise the height of the projection that the LCD of this optical sheet can be by adjusting the diffusion particle in the diffusion layer and form the adhesive linkage with curved surface between reflection polarizing film and diffusion layer according to an exemplary embodiment of the present invention, diffusion is from the light of light source and improve brightness uniformity.
It will be apparent to those skilled in the art that under the situation that does not break away from the spirit or scope of the present invention, can carry out various modifications and variations in an embodiment.Therefore, embodiments of the invention are intended to be encompassed in the modifications and variations of the present invention that provided in the scope of claims and equivalent thereof.
Claims (10)
1. optical sheet comprises:
Reflection polarizing film;
First adhesive linkage, it is on a surface of described reflection polarizing film, the first of described first adhesive linkage is first thickness T 1 to the vertical range on a described surface, and the second portion of described first adhesive linkage is second thickness T 2 to the vertical range on a described surface, wherein, described first thickness and described second thickness is poor | T1-T2| be in 10nm≤| in the scope of T1-T2|≤2 μ m; And
First diffusion layer, it is on described first adhesive linkage, and described first diffusion layer comprises first light transmitting material and a plurality of first diffusion particle, wherein, a particle in described a plurality of first diffusion particle has the part of protruding predetermined altitude h1 on the surface of described first light transmitting material
Wherein, described predetermined altitude h1 is the function of the diameter D1 of the described particle in described a plurality of first diffusion particle, and described function is 0.1D1≤h1≤0.7D1
2. optical sheet as claimed in claim 1, wherein, described first thickness and described second thickness are 1 μ m to 10 μ m basically.
3. optical sheet as claimed in claim 1 further comprises:
Second adhesive linkage, it is on another surface of described reflection polarizing film, the first of described second adhesive linkage is the 3rd thickness T 3 to described another surperficial vertical range, and the second portion of described second adhesive linkage is the 4th thickness T 4 to described another surperficial vertical range, wherein, described the 3rd thickness and described the 4th thickness is poor | T3-T4| be in 10nm≤| in the scope of T3-T4|≤2 μ m; And
Second diffusion layer, it is on described second adhesive linkage, and described second diffusion layer comprises second light transmitting material and a plurality of second diffusion particle, wherein, a particle in described a plurality of second diffusion particle has the part of protruding predetermined altitude h2 on the surface of described second light transmitting material
Described predetermined altitude h2 is the function of the diameter D2 of the described particle in described a plurality of second diffusion particle, and described function is 0.1D2≤h2≤0.7D2.
4. optical sheet as claimed in claim 3, wherein, described the 3rd thickness and described the 4th thickness are 1 μ m to 10 μ m basically.
5. optical sheet as claimed in claim 1, wherein, described reflection polarizing film comprises the ground floor and the second layer, the refractive index of described ground floor is different with the refractive index of the described second layer.
6. optical sheet as claimed in claim 1, wherein, the thickness of described reflection polarizing film is 100 μ m to 300 μ m basically.
7. LCD comprises:
Light source;
Optical sheet, it is on described light source, and described optical sheet comprises:
Reflection polarizing film;
First adhesive linkage, it is on a surface of described reflection polarizing film, the first of described first adhesive linkage is first thickness T 1 to the vertical range on a described surface, and the second portion of described first adhesive linkage is second thickness T 2 to the vertical range on a described surface, wherein, described first thickness and second thickness is poor | T1-T2| be in 10nm≤| in the scope of T1-T2|≤2 μ m; And
First diffusion layer, it is on described first adhesive linkage, described first diffusion layer comprises first light transmitting material and a plurality of first diffusion particle, and wherein, a particle in described a plurality of first diffusion particles has the part of protruding predetermined altitude h1 on the surface of described first light transmitting material;
Wherein, described predetermined altitude h1 is the function of the diameter D1 of the described particle in described a plurality of first diffusion particle, and described function is 0.1D1≤h1≤0.7D1.
8. LCD as claimed in claim 7 further comprises:
Second adhesive linkage, it is on another surface of described reflection polarizing film, the first of described second adhesive linkage is the 3rd thickness T 3 to described another surperficial vertical range, and the second portion of described second adhesive linkage is the 4th thickness T 4 to described another surperficial vertical range, wherein, described the 3rd thickness and described the 4th thickness is poor | T3-T4| be in 10nm≤| in the scope of T3-T4|≤2 μ m; And
Second diffusion layer, it is on described second adhesive linkage, described second diffusion layer comprises second light transmitting material and a plurality of second diffusion particle, and wherein, a particle in described a plurality of second diffusion particles has the part of protruding predetermined altitude h2 on the surface of described second light transmitting material;
Wherein, described predetermined altitude h2 is the function of the diameter D2 of the described particle in described a plurality of second diffusion particle, and
Described function is 0.1D2≤h2≤0.7D2.
9. LCD as claimed in claim 7, wherein, described reflection polarizing film comprises the ground floor and the second layer, the refractive index of described ground floor is different with the refractive index of the described second layer.
10. LCD as claimed in claim 7, wherein, the thickness of described reflection polarizing film is 100 μ m to 300 μ m basically.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080048919 | 2008-05-27 | ||
| KR10-2008-0048919 | 2008-05-27 | ||
| KR20080048919 | 2008-05-27 | ||
| KR10-2008-0080417 | 2008-08-18 | ||
| KR1020080080417A KR100960556B1 (en) | 2008-05-27 | 2008-08-18 | Optical sheet and Liquid Crystal Display using the same |
| KR1020080080417 | 2008-08-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101592822A CN101592822A (en) | 2009-12-02 |
| CN101592822B true CN101592822B (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101858090A Active CN101592822B (en) | 2008-05-27 | 2008-12-10 | Optical sheet and liquid crystal display including the same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100960556B1 (en) |
| CN (1) | CN101592822B (en) |
| TW (1) | TWI372914B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015163363A1 (en) * | 2014-04-25 | 2015-10-29 | 東レ株式会社 | Edge light-type backlight reflection film and backlight using same |
| KR101728678B1 (en) * | 2015-05-18 | 2017-05-02 | 주식회사 엘엠에스 | Reflective Polarizing Module Having Particle and Back Light Unit Having the Same |
| KR101691541B1 (en) * | 2015-06-04 | 2016-12-30 | 주식회사 엘엠에스 | Reflective Polarizing Module Having Diffusion pattern and Back Light Unit Having the Same |
| KR20170064039A (en) * | 2015-11-30 | 2017-06-09 | 엘지디스플레이 주식회사 | Optical Film And Liquid Crystal Display Comprising The Same |
| KR101900932B1 (en) * | 2015-11-30 | 2018-09-27 | 엘지디스플레이 주식회사 | Optical Film And Method For Manufacturing Of The Same, Liquid Crystal Display |
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|---|---|---|---|---|
| JP2000275741A (en) * | 1999-03-24 | 2000-10-06 | Mitsubishi Rayon Co Ltd | Transmission type screen |
| CN1375066A (en) * | 1999-09-20 | 2002-10-16 | 3M创新有限公司 | Optical films having at least one particle-containing layer |
| CN1381756A (en) * | 2001-04-16 | 2002-11-27 | 夏普公司 | Adhesive sheet, layered sheet and liquid crystal display unit |
| CN101097348A (en) * | 2006-06-26 | 2008-01-02 | 惠和株式会社 | Optical unit and liquid crystal display module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4101339B2 (en) | 1997-09-25 | 2008-06-18 | 大日本印刷株式会社 | Light diffusing film, manufacturing method thereof, polarizing plate with diffusing layer, and liquid crystal display device |
| JP2001074919A (en) | 1999-09-03 | 2001-03-23 | Fuji Photo Film Co Ltd | Light diffusing body and its production |
| US20060291055A1 (en) | 2005-06-15 | 2006-12-28 | 3M Innovative Properties Company | Diffuse Multilayer Optical Article |
| JP5011877B2 (en) | 2006-08-04 | 2012-08-29 | 凸版印刷株式会社 | Anti-glare light diffusing member and display having anti-glare light diffusing member |
-
2008
- 2008-08-18 KR KR1020080080417A patent/KR100960556B1/en active IP Right Grant
- 2008-11-20 TW TW097144853A patent/TWI372914B/en not_active IP Right Cessation
- 2008-12-10 CN CN2008101858090A patent/CN101592822B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000275741A (en) * | 1999-03-24 | 2000-10-06 | Mitsubishi Rayon Co Ltd | Transmission type screen |
| CN1375066A (en) * | 1999-09-20 | 2002-10-16 | 3M创新有限公司 | Optical films having at least one particle-containing layer |
| CN1381756A (en) * | 2001-04-16 | 2002-11-27 | 夏普公司 | Adhesive sheet, layered sheet and liquid crystal display unit |
| CN101097348A (en) * | 2006-06-26 | 2008-01-02 | 惠和株式会社 | Optical unit and liquid crystal display module |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100960556B1 (en) | 2010-06-03 |
| KR20090123748A (en) | 2009-12-02 |
| TWI372914B (en) | 2012-09-21 |
| CN101592822A (en) | 2009-12-02 |
| TW200949367A (en) | 2009-12-01 |
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