CN106444155A - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
- Publication number
- CN106444155A CN106444155A CN201611072413.6A CN201611072413A CN106444155A CN 106444155 A CN106444155 A CN 106444155A CN 201611072413 A CN201611072413 A CN 201611072413A CN 106444155 A CN106444155 A CN 106444155A
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- China
- Prior art keywords
- backlight module
- quantum
- metal nano
- brightness enhancement
- rod
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Classifications
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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
Abstract
The invention discloses a backlight module. The backlight module comprises a light guiding plate, a light source installed at one side of the light guiding plate, a reflector plate installed below the light guiding plate, and a brightening film installed above the light guiding plate. The brightening film comprises a polymer film layer containing a quantum material and a polymer film layer containing a metal nano-material. The backlight module can be used for a liquid crystal display. The brightening film of the backlight module comprises the polymer film layer containing the quantum material and the polymer film layer containing the metal nano-material. High-polarization blue, red and green light can be obtained at the same time in the maximum efficiency.
Description
Technical field
The present invention relates to a kind of back light source structure, particularly to a kind of down straight aphototropism mode set and liquid crystal display.
Background technology
Liquid crystal display（LCD, Liquid Crystal Display）Have become as current most common Display Technique.
Because LCD has the advantages that environmental protection, low power consuming, Low emissivity, picture are soft, LCD would is that in coming few decades
Main flow Display Technique.LCD is the display device of non-luminescent, needs to can be only achieved display function by backlight module, so the back of the body
The quality of light module performance can directly affect LCD imaging quality.The main member of backlight module includes：Light source, light guide plate, all kinds of
Blooming piece.
The blooming piece of backlight module mainly includes reflectance coating, brightness enhancement film, diffusion barrier.The work of brightness enhancement film in backlight module
With being to adjust the light to outside observer visual angle to observer's angular field of view, that is, there is light-focusing function, improve light
Utilization rate.
With the demand of liquid crystal display market high brightness, in current liquid crystal display module, generally adopt brightness enhancement film
（Brightness EnhancementFilm, BEF）, it is arranged in the backlight module of liquid crystal display module in order to increase backlight
The luminous efficiency of module.
Liquid crystal cell in the new wide-gamut LED of quantum dot LED-backlit+liquid crystal panel mode shows, in liquid crystal panel
Combine the effect serving photoswitch with upper and lower two panels cross-polarization piece.The light unbiased polarization state sending from quantum dot LED, logical
When crossing liquid crystal panel lower panel polaroid, only P polarization light passes through, and S-polarization light is by absorption loss, therefore from quantum dot LED
Incide in backlight module in the light energy of liquid crystal panel and about only 50% be utilized.DBEF（Dual Brightness
Enhancement Film）It is a kind of brightness enhancement film being overlapped by multilamellar refractive anisotrop thin-film material.From quantum dot
The no polarisation that LED sends, after inciding DBEF, P polarization light passes through；And S-polarization light is reflected by DBEF, through backlight module substrate
Diffuse-reflectance after be again changed into no polarisation, be again incident on DBEF.So S-polarization light can be recycled by DBEF, thus
Improve and incide the utilization rate of light energy in liquid crystal panel, its utilization rate can reach 80% about, than no DBEF when improve 60%.
Therefore effect in LED shows for the DBEF backlight module is extremely important.But, DBEF is for a long time mainly by U.S. 3M mono- the father-in-law
Department is monopolized, expensive, is cost highest part in each optical thin film of LED-backlit module." removing DBEF " bloom energy profit
Become the study hotspot in LED display technique with rate technology, be also difficult point simultaneously.
Content of the invention
It is an object of the invention to overcoming shortcoming and the deficiency of prior art, provide a kind of down straight aphototropism mode set, this back of the body
Light module contains active brightness enhancement film, can with maximal efficiency while obtain the blue, red of high degree of polarisation and green light.
Another object of the present invention is to providing a kind of liquid crystal display including above-mentioned backlight module.
For reaching one of above-mentioned purpose, the present invention employs the following technical solutions：
A kind of backlight module, the light source including light guide plate, being arranged on described light guide plate side, is arranged on below described light guide plate
Reflector plate, and it is arranged on the brightness enhancement film above described light guide plate, described brightness enhancement film includes the polymer thin containing quantum material
Film layer and the polymer film layer containing metal nano material.
Further, described quantum material is in and aligns, and described metal nano material is in align, described quantum material
Material is perpendicular to the orientation of metal nano material.
Brightness enhancement film is at least by one layer of quantum material polymers thin film and the pressing of layer of metal nano material thin polymer film
Become it is also possible to be gathered by quantum material polymers thin film more than two-layer or two-layer and metal nano material more than two-layer or two-layer
Compound film laminating forms.
In backlight module, the one side of the quantum material polymers layer of brightness enhancement film is disposed close to the place of light source, permissible
Obtain the highly polarized light that quantum material sends in maximum efficiency.
Further, described quantum material is quantum rod, and described metal nano material is metal nano-rod.
Further, the length of described quantum rod is 10 ~ 50nm, and radius is 0.5 ~ 10nm, the length of described metal nano-rod
Spend for 5 ~ 500nm, radius is 0.5 ~ 100nm.
Further, described quantum material is monokaryon material or nucleocapsid covering property material, described metal nano material choosing
Nano material from Au, Ag, Cu, Al, Fe, Zn.
Further, the polymeric material used by described polymer film layer is selected from PMMA, PAN, PVC, PVA at least
A kind of.
Further, it is provided with blooming above described brightness enhancement film.
Further, at least one in scattering film, reflecting polarizer, brightness enhancement film for the described blooming.Increasing herein
Bright film can be generally in the art, general brightness enhancement film, you can be the film of any brightening effect it is not required that and blooming
The brightness enhancement film of lower section is identical.
A kind of liquid crystal display, it includes above-mentioned backlight module.
Quantum rod（Quantum Rod）Be a kind of grow bar-shaped nanocomposite optical material, also there is as quantum dot nucleocapsid
Structure and narrower FWHM（Wide colour gamut）.In addition, quantum rod stimulated radiation fluorescence has the characteristic of linear polarization, the journey of polarization
Degree depends on quantum rod draw ratio.The present invention has the feature of wide colour gamut and line polarized light concurrently it is proposed that one kind contains based on quantum rod
There is the backlight module of the active brightness enhancement film of metal nano-rod polymeric layer and the pressing of perpendicular quantum rod polymeric layer,
It is expected to very much become a new generation's width colour gamut, low cost（No DBEF）The key core technology of LED display technique, breaks through existing LED
Display Technique bottleneck.
The invention has the advantages that：
The present invention proposes the backlight module of the bloom capacity usage ratio of a kind of " no DBEF ", and the brightness enhancement film of backlight module includes containing
Have polymer film layer and the polymer film layer containing metal nano material of quantum material, can with maximal efficiency while obtain
Polarize blue, the red and green light of high degree of polarisation to height, this brightness enhancement film can replace the DBEF thin film of even better than 3M company,
It is expected to break the monopolization of 3M a company of the U.S., solve its cost ceiling price in each optical thin film of LED-backlit module expensive
Problem.
Brief description
Fig. 1 is the structural representation of embodiment 1LED backlight module；
Fig. 2 is the structural representation of embodiment 1 quantum rod increment film；
Fig. 3 is the polarization property analysis result of embodiment 2 active brightness enhancement film.
Specific embodiment
With reference to specific embodiment, the present invention is described further.
Embodiment 1
LED-backlit module is as shown in figure 1, this liquid crystal display module includes reflector plate 1, the leaded light being cascading from bottom to top
Plate 2, quantum rod brightness enhancement film 4, blooming 5, are provided with light source 3 in light guide plate 2 side.
Downward for light source is partly all reflected towards by reflector plate；The light sending from light source is switched to plane by light guide plate
Light.
The structure of quantum rod increment film is as shown in Fig. 2 include the polymer containing quantum rod stacking gradually from bottom to top
The thin layer 4a and polymer film layer 4b containing metal nano-rod, quantum rod is in align, and metal nano-rod is in orientation row
Row, perpendicular to the orientation of metal nano-rod, this is to allow the green of the high degree of polarisation that quantum bar material launches to quantum rod
Light and red light-transmissive metal nano-rod polymer and do not reflected in a large number.The one of the 4a of polymeric layer containing quantum rod in brightness enhancement film 5
Face is disposed close to the place of light source 2, its objective is can obtain the highly polarized light that quantum rod sends in maximum efficiency.
Quantum rod is monokaryon material or nucleocapsid covering property material, and length is 10 ~ 50nm, and radius is 0.5 ~ 10nm, metal
Nanometer rods are selected from the nano material of Au, Ag, Cu, Al, Fe, Zn, and length is 5 ~ 500nm, and radius is 0.5 ~ 100nm.
The core luminescent nanocrystal of quantum rod is selected from the element shape in ii main group and VI main group in the periodic table of elements
Any in any one in the first compound becoming, the second compound of element formation in ii I main group and V main group
Multiple in a kind of, described first compound and/or described second compound.Described first compound includes：CdSe、CdTe、
MgS, MgSe, MgTe, CaS, CaSe, CaTe, SrS, SrSe, SrTe, BaS, BaSe, BaTe, ZnS, ZnSe, ZnTe and CdS；Institute
State second compound to include：GaN, GaP, GaAs, InN, InP and InAs.Core luminescent nanocrystal can also selected from CdSeS,
CdZnSe、ZnSeS、CuInS2、CuInSe2、AgInS2、ZnMnSe、CdPbX3（X=Cl、Br、I）Deng.
The inorganic shell of quantum rod extension can be one layer or multilamellar, Shell Materials can be CdS, ZnS, ZnSe,
CdS/ZnS, CdS/ZnSe, CdZnSe, CdZnS etc..
Polymeric material used by polymer film layer is selected from least one in PMMA, PAN, PVC, PVA.
At least one in scattering film, reflecting polarizer, brightness enhancement film for the blooming.
Embodiment 2
Brightness enhancement film is at least formed by one layer of quantum material polymers thin film and the pressing of layer of metal nano material thin polymer film,
Can be by quantum material polymers thin film more than two-layer or two-layer and metal nano material polymer more than two-layer or two-layer
Film laminating forms.
The brightness enhancement film of embodiment 1 can be prepared in accordance with the following methods：
S1, quantum rod and polymer are made thin polymer film A；
S2, metal nano-rod and polymer are made thin polymer film B；
S3, by thin polymer film A and thin polymer film B pressing be prepared into brightness enhancement film.
Quantum material and metal nano material is made to align by methods such as electrostatic spinning, electromagnetic field, template；Pass through
The methods such as rotation method, casting method, ink-jet method, method of electrostatic spinning prepare thin polymer film A, thin polymer film B.
Taking CdSe/CdS quantum rod+metal Au nanometer rods as a example.
First PVA is made solution（Concentration is 10 ~ 40wt%）, it is subsequently adding CdSe/CdS quantum bar material, by planetary
Gravity mixer mix homogeneously, makes the quantum rod polymer composites that mass fraction is 0.5 ~ 5%, then passes through electromagnetic field
Orientation, the film-forming method of electrostatic spinning make the thin polymer film that quantum rod aligns.
Then prepare polymer P VC solution（Concentration is 10 ~ 40wt%）, doping mass fraction be 30 ~ 60% metal Au receive
Rice rod, by planetary gravity blender mix homogeneously, is then oriented by electromagnetic field, the film-forming method of electrostatic spinning makes gold
Belong to the thin polymer film that nanometer rods align.
Double-layer filmses then pass through laminating machine pressing and are prepared into a quantum rod active brightness enhancement film, and quantum rod is perpendicular to metal
The orientation of nanometer rods；More than can also be by quantum material polymers thin film more than two-layer or two-layer and two-layer or two-layer
The pressing of metal nano material thin polymer film obtains brightness enhancement film.
Quantum rod polymer film layer arrangement as shown in Fig. 2 quantum material polymer film layer arrangement pitch
Can equal can also be unequal, lateral separation be 0 ~ 300nm, longitudinally spaced is 0 ~ 300nm.
The arrangement of metal nano-rod is similar with quantum rod, arrangement pitch can equal can also be unequal, lateral separation be 0
~ 300nm, longitudinally spaced is 0 ~ 300nm.
Polarization property analysis is carried out to this active brightness enhancement film based on time-domain finite difference, light passes through metal nano-rod battle array
P light after row, the transmitance of s light（T）, reflectance（R）And absorbance（A）As shown in figure 3, as seen from the figure, light is through gold
After belonging to nano-bar material, Tp is more much higher than Ts, and the more of p light transmission are described；Rs is more much higher than Rp, illustrates that s light is reflected more
Many, so, p-polarization light can pass through in a large number, and s polarized light then major part reflected.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all answer
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (9)
1. a kind of backlight module, the light source including light guide plate, being arranged on described light guide plate side, is arranged on below described light guide plate
Reflector plate, and be arranged on the brightness enhancement film above described light guide plate it is characterised in that described brightness enhancement film is included containing quantum material
The polymer film layer of material and the polymer film layer containing metal nano material.
2. backlight module according to claim 1 it is characterised in that described quantum material be in align, described metal
Nano material is in align, and described quantum material is perpendicular to the orientation of metal nano material.
3. backlight module according to claim 1 and 2 is it is characterised in that described quantum material is quantum rod, described metal
Nano material is metal nano-rod.
4. it is characterised in that the length of described quantum rod is 10 ~ 50nm, radius is backlight module according to claim 3
0.5 ~ 10nm, the length of described metal nano-rod is 5 ~ 500nm, and radius is 0.5 ~ 100nm.
5. backlight module according to claim 1 and 2 is it is characterised in that described quantum material is monokaryon material or core
Shell covering property material, described metal nano material is selected from the nano material of Au, Ag, Cu, Al, Fe, Zn.
6. backlight module according to claim 1 is it is characterised in that polymeric material used by described polymer film layer
At least one in PMMA, PAN, PVC, PVA.
7. backlight module according to claim 1 is it is characterised in that be provided with blooming above described brightness enhancement film.
8. backlight module according to claim 7 it is characterised in that described blooming be selected from scattering film, reflecting polarizer,
At least one in brightness enhancement film.
9. a kind of liquid crystal display is it is characterised in that described liquid crystal display includes the back of the body any one of claim 1 ~ 8
Light module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072413.6A CN106444155A (en) | 2016-11-29 | 2016-11-29 | Backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072413.6A CN106444155A (en) | 2016-11-29 | 2016-11-29 | Backlight module and liquid crystal display |
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| CN106444155A true CN106444155A (en) | 2017-02-22 |
Family
ID=58219445
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611072413.6A Pending CN106444155A (en) | 2016-11-29 | 2016-11-29 | Backlight module and liquid crystal display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513304A (en) * | 2017-08-23 | 2017-12-26 | 南方科技大学 | A kind of preparation method of the fluorescence polarization film aligned based on quantum rod |
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| US20160027963A1 (en) * | 2014-07-25 | 2016-01-28 | Samsung Electronics Co., Ltd. | Optical elements and electronic devices including the same |
| US20160087047A1 (en) * | 2012-11-23 | 2016-03-24 | Lg Display Co., Ltd. | Quantum rod and method of fabricating the same |
| CN105954932A (en) * | 2016-07-06 | 2016-09-21 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display device |
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2016
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Patent Citations (8)
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|---|---|---|---|---|
| CN103228983A (en) * | 2010-11-10 | 2013-07-31 | 纳米系统公司 | Quantum dot films, lighting devices, and lighting methods |
| CN102918667A (en) * | 2010-12-28 | 2013-02-06 | Lg电子株式会社 | Light device, light emitting diode package using the same, and backlight device |
| US20160087047A1 (en) * | 2012-11-23 | 2016-03-24 | Lg Display Co., Ltd. | Quantum rod and method of fabricating the same |
| CN103489998A (en) * | 2013-10-15 | 2014-01-01 | 四川柏狮光电技术有限公司 | Light-emitting assembly and manufacturing method thereof, as well as LED (light-emitting diode) lighting device with light-emitting assembly |
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| CN104701431A (en) * | 2014-11-27 | 2015-06-10 | 厦门市三安光电科技有限公司 | Epitaxial structure of LED and manufacturing method of epitaxial structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513304A (en) * | 2017-08-23 | 2017-12-26 | 南方科技大学 | A kind of preparation method of the fluorescence polarization film aligned based on quantum rod |
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Application publication date: 20170222 |
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