CN104749681A - Polarizing plate - Google Patents
Polarizing plate Download PDFInfo
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- CN104749681A CN104749681A CN201510122029.1A CN201510122029A CN104749681A CN 104749681 A CN104749681 A CN 104749681A CN 201510122029 A CN201510122029 A CN 201510122029A CN 104749681 A CN104749681 A CN 104749681A
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- layer
- quantum rod
- polarizer
- polarizing layer
- polymer
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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
-
- 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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
Abstract
The invention provides a polarizing plate applied to a liquid crystal display. The polarizing plate comprises a polarizing layer, a quantum rod layer, a first protecting layer and a second protecting layer, wherein the polarizing layer is provided with an absorbing shaft; the quantum rod layer is arranged on the surface of the polarizing layer and provided with a plurality of quantum bars; the long shafts of the plurality of quantum rods are arranged in the direction vertical to the absorbing shaft of the polarizing layer and is parallel to a transmission shaft of the polarizing layer; the first protecting layer is arranged at one side of the polarizing layer, opposite to the quantum rod layer; the second protecting layer is arranged at one side of the quantum rod layer, opposite to the polarizing layer. According to the polarizing plate, unpolarized incident light emitted by a backlight source enters the polarizing plate and is converted by the quantum rods into polarized light and then directly flows through the polarizing layer, and therefore, the utilization rate of the backlight source can be increased.
Description
Technical field
The invention relates to a kind of Polarizer, refer in particular to a kind of integrated type polarizing plate containing quantum rod, described Polarizer can be used for liquid crystal display, makes liquid crystal display have better colour gamut and light source utilization rate.
Background technology
The Polarizer that known liquid crystal display is arranged in pairs or groups, generally adopt absorption-type Polarizer, when the non-polarization light that backlight sends is through this Polarizer, component on the absorption direction of principal axis of Polarizer cannot be able to be passed through by absorbing, therefore, this Polarizer only can reach less than 50% in theory to the penetrability of backlight, light is again through the electrode layer of liquid crystal panel, colored filter, after the structure such as liquid crystal layer and glass substrate, the brightness of the actual visual display of user, then only remaining backlight send less than 10%, backlight utilization factor is quite low and cause the waste of the energy.
And the existing method that there is much increase backlight efficiency has been suggested, such as increase brightness enhancement film, prismatic lens equals in backlight module, after constantly cannot reflecting and recycle or concentrate through the light of Polarizer, the object of blast is reached again through Polarizer, but in order to not affect visual angle, often need to adopt multilayer brightness enhancement film and prismatic lens combination collocation, and add backlight module thickness.
In addition, also a solution is proposed, quantum rod layer is increased in backlight module, quantum rod is nano semiconductor material, shape belongs to one-dimentional structure, the polarization light longer than former incident light source wavelength is inspired after the unpolarized light of its long axis direction Absorbable rod, and because of internal quantum high, therefore the light of backlight can be converted to polarized light in a large number, through the major axis alignment direction of adjustment quantum rod, its polarized light excited is easily through the penetrating shaft of the Polarizer on liquid crystal panel, therefore relative to not increasing the unpolarized backlight before quantum rod layer, light source utilization rate can be increased in theory, but the semiconductor material of this type of quantum rod easily reduces serviceable life by the water oxygen in environment affects usually, therefore encapsulating structure need be increased separately, such as increase barrier layer in its surface, therefore, the thickness of backlight source module also correspondingly increases, separately because quantum rod layer is arranged in backlight source module, distance backlight is nearer, if the heat that the backlight of existing display produces is without suitable heat dissipation design or increase heat insulation structural, also can make quantum rod heat fading and reduce fluorescence efficiency, and in the path passed through of light to the panel that backlight sends, need light guiding film in backlight module, diffusion barrier, brightness enhancement film, the bloomings such as many groups prismatic lens and Polarizer outer protective film, if quantum rod layer is arranged in the blooming layer structure of backlight module, its excite the polarized light source of conversion through between blooming repeatedly refraction with reflection after, the polarization degree of the polarized light source parallel with Polarizer penetrating shaft and directivity also can significantly reduce, and reduce the actual light-inletting quantity penetrating the lower Polarizer of panel, if only single quantum rod layer is arranged in pairs or groups backlight as polarized light source again, omit various blooming or lower Polarizer, then the polarizing effectiveness of backlight is still not good, though because of backlight by the penetrability of quantum rod layer be better than through single Polarizer 50%, but because quantum rod has major axis and minor axis, though long axis direction can be inspired polarized light by backlight, and short-axis direction also has partial penetration light component, therefore, also cannot reach the Polarizer adopted as existing liquid crystal display has more than 99% degree of polarization to quantum rod layer, and cause liquid crystal display user's demand is not inconsistent to when saturation degree.
Therefore the present invention proposes a kind of integrated type polarizing plate structure, can not need, under the design of changing existing liquid crystal display and backlight module, to reach better light source utilization rate.
Summary of the invention
Because the problem of above-mentioned known techniques; the object of the present invention is to provide a kind of Polarizer; by the quantum rod layer be integrated in polarized light plate structure; to increase the light-inletting quantity penetrating the polarizing layer of Polarizer; and the polarizing layer of arranging in pairs or groups still can provide high degree of polarization; and the protective seam had using Polarizer itself is as the barrier layer of quantum rod layer; increase the thickness of existing display and backlight module hardly; and be positioned at outside backlight module because of this Polarizer; more be not subject to the evolution of heat impact of backlight institute, to overcoming the difficult point of existing product.
For achieving the above object, the invention provides a kind of Polarizer, in a better enforcement aspect, it comprises: polarizing layer, and it has absorption axle; Quantum rod layer, it is arranged at the surface of polarizing layer, and comprises a plurality of quantum rod, and the major axis orientation of this plurality of quantum rod perpendicular to the absorption axle of polarizing layer, that is is parallel to the penetrating shaft of polarizing layer; First protective seam, it is arranged at the side in contrast to this quantum rod layer of polarizing layer; And second protective seam, it is arranged at the side in contrast to this polarizing layer of quantum rod layer.
In the Polarizer of an embodiment, this side of being somebody's turn to do in contrast to this polarizing layer of quantum rod layer be the incident side of incident light, and polarizing layer should be light emission side in contrast to this side of this quantum rod layer.
In the Polarizer of another embodiment, the wavelength of incident light is 300nm to 495nm, to excite this quantum rod layer.
In the Polarizer of another embodiment, the semiconductor material of this plurality of quantum rod is selected from the group that forms of compound of iii-v, II-VI group, group IV-VI and combination thereof.
In the Polarizer of another embodiment, polarizing layer is absorption-type polarizing layer, reflection-type polarizing layer, dyeing type polarizing layer, application type polarizing layer, grating type polarizing layer or its combination.
In the Polarizer of another embodiment, this plurality of quantum rod is scattered in polymkeric substance, to form quantum rod layer.
In the Polarizer of another embodiment, the polymkeric substance of quantum rod layer comprise polyvinyl alcohol polymer, poly methyl methacrylate polymer, cyclic olefin polymer or silicone polymer at least one of them.
In the Polarizer of another embodiment, the material of the first protective seam and the second protective seam comprise Triafol T, ethylene glycol terephthalate polymkeric substance, poly methyl methacrylate polymer, cyclic olefin polymer, silicone polymer or comprise metal oxide organic/inorganic composite film at least one of them.
In the Polarizer of another embodiment, the first protective seam is compensate film.
In the Polarizer of another embodiment, between the first protective seam and polarizing layer, and between the second protective seam and quantum rod layer, respectively optionally there is encapsulation glue-line.
In the Polarizer of another embodiment, the material of this encapsulation glue-line comprise poly methyl methacrylate polymer, epoxy resin, polysiloxane polymer, fluororesin polymer or multipolymer at least one of them.
Compared with prior art, Polarizer of the present invention increases the thickness of existing display and backlight module hardly, is not more subject to the evolution of heat impact of backlight institute simultaneously, improves the utilization factor of backlight.
Accompanying drawing explanation
Fig. 1 a to 1b is the schematic diagram that Polarizer one of the present invention implements aspect;
Fig. 2 a to 2c is the different arrangement architecture schematic diagram of quantum rod layer, polarizing layer and diffusion barrier; And
Fig. 3 is the schematic diagram that the diffusion barrier of different haze value affects quantum rod layer dichroic ratio.
Embodiment
More easily understand for making inventive features of the present invention, content and advantage and the effect that can reach thereof, hereby the present invention is coordinated accompanying drawing, and be described in detail as follows with the expression-form of embodiment, and it is wherein used graphic, its purport is only the use of signal and aid illustration book, may not be actual proportions after the invention process and precisely configure, thus should not understand with regard to the ratio of accompanying drawing and configuration relation, the interest field limited the invention in actual enforcement, conjunction is first chatted bright.
Hereinafter with reference to relevant drawings, the embodiment according to Polarizer of the present invention is described, for making to be convenient to understand, the similar elements in following embodiment illustrates with identical symbology.
Shown in Fig. 1 a to 1b, it is the schematic diagram of the Polarizer 1 of a better enforcement aspect provided by the present invention; Polarizer 1 comprises: polarizing layer 2, and it has absorption axle 2a; Quantum rod layer 3, it is arranged at the surface of polarizing layer 2, and comprises a plurality of quantum rod 31, and the major axis 3a orientation of a plurality of quantum rod is perpendicular to the absorption axle 2a of polarizing layer; First protective seam 4, it is arranged at the side in contrast to quantum rod layer 3 of polarizing layer 2; And second protective seam 5, it is arranged at the side in contrast to polarizing layer 2 of quantum rod layer 3.
In the Polarizer of an embodiment, the side in contrast to polarizing layer 2 of quantum rod layer 3 is the incident side of incident light L1, the side in contrast to quantum rod layer 3 of polarizing layer 2 is light emission side, make unpolarized incident light L1 first can be converted to the polarized light vertical with the absorption axle 2a direction of polarizing layer 2 through quantum rod layer 3, and pass through the penetrating shaft direction of polarizing layer 2.
In the Polarizer of another embodiment, the wavelength of incident light L1 between ultraviolet light to blue light range, be preferably 300nm to 495nm, the exciting light being comparatively longer than lambda1-wavelength is released with excitation quantum rod layer, and the quantum rod of different size can be adjusted to regulate and control the color of exciting light, as CdSe quantum rod, under the blue light source of 460nm excites by selectivity, when its major axis is 30nm to 40nm, the ruddiness that wavelength is about 630nm when minor axis is 5nm to 10nm, can be sent; When its major axis is 20nm to 30nm, the green glow that wavelength is about 550nm can be sent when minor axis is 2nm to 5nm, through adjusting the quantum rod content of different size, the blue light penetrated and the ruddiness, the green glow ratio that inspire can be controlled, be mixed into the light source of white light as display, and have narrower halfwidth (FWHM, full width at half maximum) because of the excitation spectrum of quantum rod material, therefore colour gamut (Gamut) area that display can be made to show is wider.
In the Polarizer of another embodiment, form the group that forms of compound that the semiconductor material of quantum rod is selected from iii-v, II-VI group, group IV-VI and combination thereof; Such as include but not limited to following compounds: AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InSb, ZnO, ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgSe, HgTe, PbS, PbSe or PbTe.
In the Polarizer of another embodiment, polarizing layer 2 can adopt absorption-type polarizing layer, reflection-type polarizing layer, dyeing type polarizing layer, application type polarizing layer, grating type polarizing layer or its combination according to the application of display.
In the Polarizer of another embodiment, above-mentioned quantum rod is scattered in polymkeric substance, and can to rub orientation method etc. by electric field driven, extension method, brush, the long axis single direction of a plurality of quantum rod is arranged, and to form quantum rod layer 3 after overcuring, the polymkeric substance of quantum rod layer 3 comprises polyvinyl alcohol polymer, poly methyl methacrylate polymer, cyclic olefin polymer or silicone polymer.
Please refer to following table one, it is for be scattered in polyvinyl alcohol (PVA) by quantum rod, the percentage by weight of the relative polyvinyl alcohol (PVA) of quantum rod is 5.48%, through extending 5 times of quantum rod layers 3 made, different structure stacked with the diffusion barrier in polarizing layer 2 and backlight module again combines, use the Mechanics ConoScope sub-ray spectrometer manufactured by autronic-MELCHERS GmbH (German manufacturer), using under the blue incident light that wavelength is 445nm, dichroic ratio (the Dichroic Ratio of gained, DR), dichroic ratio is with formula DR=Y
/// Y
⊥calculate and obtain, wherein Y
//for quantum rod layer 3 major axis parallel with polarizing layer 2 penetrating shaft time the penetration that obtains, Y
⊥for quantum rod layer 3 major axis vertical with polarizing layer 2 penetrating shaft time the penetration that obtains, when incident light is without quantum rod layer 3 or polarizing layer 2, its Y
//with Y
⊥almost identical, therefore dichroic ratio is 1.06, and brightness measured after single polarizing layer 2 is only 98nits, when dichroic ratio numerical value is larger, represent institute's test sample product and there is obvious dichromatism, make the incident light by sample, there is preferably polarizability and directivity; The each layer arrangement architecture combining one in table is shown in Fig. 2 a, it is for incident light L1 is by directly passing through the numerical value measured by polarizing layer 2 after quantum rod layer 3, now quantum rod layer 3 has dichroic ratio 3.35, brightness then inspires green glow and ruddiness because of blue incident light and is significantly increased to 595nits, known incident light L1, after quantum rod layer 3, can increase and is converted to parallel with the penetrating shaft direction of polarizing layer 2 and enters green glow and the red-light source ratio of polarizing layer 2; The each layer arrangement architecture combining two in table is shown in Fig. 2 b, it is the diffusion barrier 6 of incident light L1 first by adopting in general backlight module, the mist degree of this diffusion barrier 6 is 30%, again successively by quantum rod layer 3 and the numerical value measured by polarizing layer 2, now diffusion barrier 6 and quantum rod layer 3 have dichroic ratio 3.23, and measured brightness is 581nits; Each layer arrangement architecture of combination three is shown in Fig. 2 c, it is that incident light L1 is first by quantum rod layer 3, again successively by mist degree be 30% diffusion barrier 6 and the numerical value measured by polarizing layer 2, now quantum rod layer 3 and diffusion barrier 6 have dichroic ratio 2.98, and measured brightness is 538nits; By combination two and the numerical value measured by combination three, when known diffusion barrier 6 in combination three is between quantum rod layer 3 and polarizing layer 2, dichroic ratio will be made to reduce more, represent by after quantum rod layer 3 there is the light source of highly directive, if non-directional bloomings such as the diffusion barriers again in backlight film group, easier in situations such as refraction, scattering, reflections, and make Y
//with Y
⊥difference degree reduces, and affects the light source ratio that 3 generation of quantum rod layer are parallel with polarizing layer 2 penetrating shaft direction; And combine two dichroic ratios surveyed and though brightness also has a little degree to reduce, the collimation being speculated as former incident light L1 changes incident angle by the particle scattering in diffusion barrier 6, cause quantum rod stimulation effect to reduce, but the light source utilization rate of entirety is still better than combination three; Please also refer to Fig. 3, when it is the diffusion barrier adopting different haze value further, the diffusion barrier measuring different haze value to dichroic ratio effect, with the data measured by combinations thereof two mode for numerical value one, to combine data measured by three modes for numerical value two; Can find out that the amplitude that combination three reduces all still is greater than combination two, and along with the increase of mist degree, because light has more times refraction, scattering, reflection between the particle of diffusion barrier 6, dichroic ratio will be made more to reduce; Therefore, the conventional approaches relative to being arranged at by quantum rod layer 3 in backlight module can be learnt, quantum rod layer 3 is arranged among Polarizer by the present invention, backlight can directly by polarizing layer 2 after quantum rod layer 3 excites, more not easily because other blooming additional is between quantum rod layer 3 and Polarizer, destroy the light source polarizability that quantum rod layer 3 produces, and reduce too much dichroic ratio.
Table one:
Combination one | Combination two | Combination three | Blue-light source | |
Dichroic ratio | 3.35 | 3.23 | 2.98 | 1.06 |
Brightness (nits) | 595 | 581 | 538 | 98 |
In the Polarizer of another embodiment, the material of the first protective seam 4 and the second protective seam 5 comprises Triafol T, ethylene glycol terephthalate polymkeric substance, poly methyl methacrylate polymer, cyclic olefin polymer, silicone polymer or comprises the organic/inorganic composite film of metal oxide.
In the Polarizer of another embodiment, the first protective seam 4 is compensate film, such as, for the view film at the visual angle or colour cast of improving liquid crystal display.
In the Polarizer of another embodiment, between first protective seam 4 and polarizing layer 2, and the adhesive coating that second uses between protective seam 5 and quantum rod layer 3, can distinguish and optionally adopt encapsulation glue-line, to protect quantum rod layer 3 further, and the aqueous vapor, oxygen etc. in isolated environment, increase the serviceable life of quantum rod layer 3; The material of encapsulation glue-line such as can be poly methyl methacrylate polymer, epoxy resin, polysiloxane polymer, fluororesin polymer or multipolymer.
Above-described embodiment is only and technological thought of the present invention and feature is described, its object understands content of the present invention implementing according to this enabling those skilled in the art, when can not with restriction the scope of the claims of the present invention, namely the equalization generally done according to disclosed spirit changes or modifies, and must be encompassed in the scope of the claims of the present invention.
Claims (11)
1. a Polarizer, is characterized in that this Polarizer comprises:
Polarizing layer, it has absorption axle;
Quantum rod layer, it is arranged at the surface of this polarizing layer, and comprises a plurality of quantum rod, and the major axis orientation of this plurality of quantum rod is perpendicular to the absorption axle of this polarizing layer;
First protective seam, it is arranged at the side in contrast to this quantum rod layer of this polarizing layer; And
Second protective seam, it is arranged at the side in contrast to this polarizing layer of this quantum rod layer.
2. Polarizer as claimed in claim 1, what it is characterized in that this quantum rod layer should be the incident side of incident light in contrast to this side of this polarizing layer, and this side of being somebody's turn to do in contrast to this quantum rod layer of this polarizing layer be light emission side.
3. Polarizer as claimed in claim 2, is characterized in that the wavelength of this incident light is 300nm to 495nm, to excite this quantum rod layer.
4. Polarizer as claimed in claim 1, is characterized in that the semiconductor material of this plurality of quantum rod is selected from the group that forms of compound of iii-v, II-VI group, group IV-VI and combination thereof.
5. Polarizer as claimed in claim 1, is characterized in that this polarizing layer is absorption-type polarizing layer, reflection-type polarizing layer, dyeing type polarizing layer, application type polarizing layer, grating type polarizing layer or its combination.
6. Polarizer as claimed in claim 1, is characterized in that this plurality of quantum rod is scattered in polymkeric substance, to form this quantum rod layer.
7. Polarizer as claimed in claim 6, it is characterized in that this polymkeric substance of this quantum rod layer comprise polyvinyl alcohol polymer, poly methyl methacrylate polymer, cyclic olefin polymer or silicone polymer at least one of them.
8. Polarizer as claimed in claim 1, it is characterized in that the material of this first protective seam and this second protective seam comprise Triafol T, ethylene glycol terephthalate polymkeric substance, poly methyl methacrylate polymer, cyclic olefin polymer, silicone polymer or comprise metal oxide organic/inorganic composite film at least one of them.
9. Polarizer as claimed in claim 1, is characterized in that this first protective seam is compensate film.
10. Polarizer as claimed in claim 1, is characterized in that between this first protective seam and this polarizing layer, and between this second protective seam and this quantum rod layer, optionally has encapsulation glue-line respectively.
11. Polarizers as claimed in claim 10, it is characterized in that the material of this encapsulation glue-line comprise poly methyl methacrylate polymer, epoxy resin, polysiloxane polymer, fluororesin polymer or multipolymer at least one of them.
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CN201510122029.1A CN104749681A (en) | 2015-03-19 | 2015-03-19 | Polarizing plate |
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US10416492B2 (en) | 2015-09-09 | 2019-09-17 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Polarizer |
WO2017041323A1 (en) * | 2015-09-09 | 2017-03-16 | 深圳市华星光电技术有限公司 | Polarizer |
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TWI557482B (en) * | 2015-10-28 | 2016-11-11 | 明基材料股份有限公司 | Quantum rod film |
US9778403B2 (en) | 2015-10-28 | 2017-10-03 | Benq Materials Corporation | Quantum rod film |
CN106646721A (en) * | 2016-11-24 | 2017-05-10 | 武汉华星光电技术有限公司 | Quantum dot film and backlight module |
WO2018094799A1 (en) * | 2016-11-24 | 2018-05-31 | 武汉华星光电技术有限公司 | Quantum dot thin film and backlight module |
CN108828836A (en) * | 2018-07-25 | 2018-11-16 | 惠州市华星光电技术有限公司 | Compound polaroid and liquid crystal display |
CN108803129A (en) * | 2018-08-22 | 2018-11-13 | 深圳市华星光电技术有限公司 | Quantum dot polaroid with and preparation method thereof, liquid crystal display panel and electronic equipment |
WO2020037721A1 (en) * | 2018-08-22 | 2020-02-27 | 深圳市华星光电技术有限公司 | Quantum dot polarizer and manufacturing method therefor, liquid crystal panel, and electronic device |
CN110379786A (en) * | 2019-08-12 | 2019-10-25 | 芜湖乐知智能科技有限公司 | A kind of OLED display screen mould group |
CN110379786B (en) * | 2019-08-12 | 2020-11-27 | 山西穿越光电科技有限责任公司 | OLED display screen module |
CN110888257A (en) * | 2019-11-26 | 2020-03-17 | Tcl华星光电技术有限公司 | Polaroid assembly, manufacturing method of polaroid assembly and display panel |
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