CN107065304A - A kind of quantum dot optical element and backlight module - Google Patents
A kind of quantum dot optical element and backlight module Download PDFInfo
- Publication number
- CN107065304A CN107065304A CN201710358659.8A CN201710358659A CN107065304A CN 107065304 A CN107065304 A CN 107065304A CN 201710358659 A CN201710358659 A CN 201710358659A CN 107065304 A CN107065304 A CN 107065304A
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- Prior art keywords
- quantum dot
- optical element
- dot optical
- light
- glass tube
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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
-
- 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
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Abstract
The invention provides a kind of quantum dot optical element, the transparent polymer part that the quantum dot optical element includes at least one glass tube, is arranged on the quantum dot dispersion of the glass tube and is arranged on outside the glass tube, the transparent polymer part includes incidence surface, side and the exiting surface being oppositely arranged with the incidence surface, the incidence surface and the exiting surface are in curved surface along light direction projection, and the light direction refers to the incidence surface towards the direction of the exiting surface.The present invention is it is possible to prevente effectively from glass tube is easily broken, the problem of light extraction efficiency is low.
Description
Technical field
The present invention relates to quantum dot light emitting element field, in particular to a kind of quantum dot optical element and backlight mould
Group.
Background technology
The colour developing principle that color liquid crystal is shown is the principle based on bluish-green red " three primary colours combination ", the light of these three colors by
Colored filter of the white light backlight through liquid crystal is decomposed.Wherein, the colour gamut of display is for characterizing display device to face
A kind of ability that color is reappeared, the colour gamut of display is bigger, illustrates that the color that display can be shown is more, so that performance
Picture more enriches and true.In lcd technology, the effect of liquid crystal is the light intensity for controlling different color unit, and colored
Optical filter can only play filter action, therefore single primary colours of light source determine the colour gamut of liquid crystal display.However, with reference to national television
Standard committee (NTSC), the color gamut levels of main flow liquid crystal display device are only in 72%NTSC or so on the market at present, even more
It is low.
The colour gamut for showing product can be improved using quantum dot as backlight source material to 110%NTSC, it is greatly rich
The rich expressive ability of display product.In side entering type lcd technology, quanta point material is generally encapsulated in glass tube,
Obtained Quantum Dot Glass pipe is fixed between light guide plate incidence surface and light source.Although the sealing of glass is preferably,
Glass is easily broken；Meanwhile, the light extraction efficiency of existing glass tube need to be improved.
The content of the invention
The invention provides a kind of quantum dot optical element, to solve, Quantum Dot Glass tube capacity is fragile, light extraction efficiency is low
The problem of.
According to an aspect of the invention, there is provided a kind of quantum dot optical element, the quantum dot optical element includes
At least one glass tube, the quantum dot dispersion for being arranged on the glass tube and it is arranged on saturating outside the glass tube
Bright polymer member, the transparent polymer part includes incidence surface, side and the light extraction being oppositely arranged with the incidence surface
Face, the incidence surface and the exiting surface are in curved surface along light direction projection, and the light direction refers to the incidence surface direction
The direction of the exiting surface.
Preferably, the incidence surface is parallel with the exiting surface curved surface.
Preferably, the incidence surface area is less than the exiting surface area.
Preferably, the quantum dot optical element includes at least two glass tubes, and the glass tube is in the quantum dot light
Learn and be uniformly distributed in element.
Preferably, it is not provided with 0.5 millimeter of the both sides of the plane of symmetry of the quantum dot optical element in the axial direction
The quantum dot dispersion, the axis refers to the line of the quantum dot optical element both ends of the surface central point, the end face with
The side is vertical.
Preferably, the quantum dot optical element includes two glass tubes, and described two glass tubes are with the quantum dot light
It is symmetrical centered on the plane of symmetry in the axial direction of element.
Preferably, described two glass tubes are tangent.
Preferably, the glass tube includes being arranged on the opening at two ends, and the opening is provided with seal.
Preferably, the glass tube two ends are sealed by sintering.
Preferably, the quantum dot dispersion includes the dispersed polymer substrate for having a quantum dot.
Preferably, the quantum dot includes at least one of red light quantum point and green light quantum point.
Preferably, in the transparent polymer part, it is disposed with along along light direction scattered with red light quantum point
The glass tube of body and the glass tube with green light quantum point dispersion.
According to another aspect of the present invention there is provided a kind of backlight module, including light-emitting component, the neighbouring light-emitting component
Above-mentioned quantum dot optical element.
The invention has the advantages that：By setting transparent polymer part, and transparent high score outside glass tube
The incidence surface and exiting surface of subassembly are that the present invention is it is possible to prevente effectively from Quantum Dot Glass pipe along light direction raised curved surface
It is easily broken, the problem of light extraction efficiency is low.
Brief description of the drawings
Fig. 1 shows the cross-sectional view of quantum dot optical element in first embodiment of the invention；
Fig. 2 shows back light module unit structure schematic diagram in embodiment 1；
Fig. 3 shows the structural representation of backlight module in embodiment 2；
Fig. 4 shows the structural representation of backlight module in embodiment 3.
Embodiment
Below in conjunction with embodiment of the present invention, the technical scheme in the embodiment of the present invention is described in detail, shown
So, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Mode, belongs to the scope of the present invention.
Referring to Fig. 1, according to the first embodiment of the invention, quantum dot optical element 100 includes at least one glass
Pipe 11, the quantum dot dispersion 12 being arranged on inside glass tube 11 and the transparent polymer part being arranged on outside glass tube
13, transparent polymer part 13 includes incidence surface 131, side 132 and the exiting surface 133 being oppositely arranged with incidence surface 131, enters
Smooth surface 131 and exiting surface 133 are in curved surface along light direction projection, and light direction refers to incidence surface 131 towards the side of exiting surface 133
To.
The main function that transparent polymer part is arranged on outside glass tube is to avoid glass tube from being damaged by external impacts
It is bad, fixation and peptizaiton by transparent polymer part to glass tube, allow multiple glass tubes with predetermined form group
It is fitted together, so as to change distribution of the quantum dot in quantum dot optical element.
Transparent polymer part is made up of high polymer material, and high polymer material preferably includes poly- machine silicones, polyurethane, gathered
At least one of acrylic resin, poly epoxy resin, poly- fluororesin, polyolefin and makrolon.It is different from glass, macromolecule
Material is general to be obtained the presoma solidification of liquid by way of light or heat, therefore, high polymer material is solidificated in into glass
The outside of glass pipe can avoid high-temperature operation.
As a kind of photo luminescent element, quantum dot optical element must be combined with excitation source and could lighted, the present invention
It is in curved surface along light direction projection by the way that the incidence surface and exiting surface of transparent polymer part are disposed as, it can improve and excite
The light utilization efficiency of light source.In a preferred embodiment, the radian corresponding to curved surface is in 0.01- π, more preferably 0.2-0.6.
Specifically, the incidence surface of transparent polymer part along light direction it is raised in curved surface when, larger reception light area can increase
Plus light extraction efficiency；The exiting surface of transparent polymer part along light direction it is raised in curved surface when, reflection of the light at light of appearing
Probability can be reduced effectively, so as to increase light emission rate.It is preferred that, incidence surface is parallel with exiting surface curved surface.It is preferred that, incidence surface face
Product is less than exiting surface area.
The cross section of glass tube includes at least one of circular, ellipse, polygon in the present invention, it is preferably circular or
Person's ellipse.
By adjusting quantity and the distribution of glass tube, it can effectively change the distribution of quantum dot in quantum dot optical element.
In one preferred embodiment, the quantity of Quantum Dot Glass pipe is at least two, and glass tube is in quantum dot optical element
It is uniformly distributed, is uniformly distributed and refers to that distribution of the glass tube in quantum dot optical element is random.
LED/light source it is luminous general in lambertian distribution, when by quantum dot optical element just to light source, just to light source
Direct projection central light strength is maximum, the substantial amounts of heat of direct projection centre convergence collection, so as to cause the life-span of direct projection center quanta point material
Reduce, above-mentioned influence is reduced by changing distribution of the glass tube in quantum dot optical element in the present invention.At one preferably
Embodiment in, be not provided with quantum dot within 0.5 millimeter of the both sides of the plane of symmetry of quantum dot optical element in the axial direction
Dispersion, the axis refers to the line of the quantum dot optical element both ends of the surface central point, and the end face hangs down with the side
Directly.Reduce the influence of LED/light source heat by avoiding quantum dot dispersion being arranged on just to the direct projection center of light source.It is excellent
Choosing, quantum dot optical element includes two glass tubes, and two glass tubes are with pair in the axial direction of quantum dot optical element
It is symmetrical centered on title face.The distance between thickness or glass tube by controlling glass tube, so as to reach in the plane of symmetry
The purpose of quantum dot dispersion is not provided with 0.5 millimeter of both sides.In one preferred embodiment, outside two glass tubes
The distance between wall and the plane of symmetry are at 0.5 millimeter -1 millimeter.Another preferred embodiment in, two glass tubes are tangent,
The pipe thickness of glass tube is at 0.5 millimeter -1 millimeter.
In a detailed embodiment, in order to effectively reduce the side leakage that quanta point material is luminous, quantum dot optical element
Side be additionally provided with reflecting element.Reflecting element can exist separately as a component, can also be in the way of reflective membrane
It is coated in side.
To increase the sealing of glass tube, the two ends of glass tube are sealed.It is preferred that, glass tube includes being arranged on two ends
Opening, opening is provided with seal, and the constituent material of seal includes at least one in organic polymer or inorganic oxide
Kind.Another preferred embodiment in, glass tube two ends need not use seal, and glass tube two ends are close by sintering
Envelope.
In the present invention, quantum dot dispersion includes the dispersed polymer substrate for having a quantum dot.Quantum dot is dispersed in poly-
In polymer matrix, it can be made to be not susceptible to reunite, with good dispersion effect, and these decentralized media can be with protective number
Son point is not influenceed by outside air, steam etc..Herein can be by changing material, particle size, the nucleocapsid knot of these quantum dots
Structure property etc. changes quantum dot glow color.Quantum dot can by least one of zinc, cadmium, indium, lead, copper, magnesium, aluminium element with
At least one of sulphur, selenium, phosphorus, tellurium element is constituted.Specifically, the quantum dot in present embodiment can include cadmium selenide, tellurium
One or more in cadmium, indium phosphide, cadmium sulfide, zinc sulphide.Preferably, at least a portion of quantum dot includes containing the
The core of semiconductor material and the shell being arranged at least a portion of core outer surface, shell include the second semi-conducting material.It is preferred that
, quantum dot is cadmium selenide, the sulphur indium copper of zinc sulphide cladding, the sulphur selenium zinc cadmium of zinc sulphide cladding or the vulcanization that zinc sulphide is coated
The indium phosphide of zinc cladding.Polymer substrate preferably includes poly- machine silicones, polyurethane, polyacrylic resin, poly epoxy resin, poly-
At least one of fluororesin, polyolefin and makrolon.In a specific embodiment, polymer substrate is polypropylene
Acid resin.
Quanta point material includes at least one of red light quantum point and green light quantum point.It is preferred that, green glow in the present invention
The launch wavelength of quantum dot in 520-535nm, half-peak breadth in 30 ± 10nm, the launch wavelength of red light quantum point 600-650nm,
Half-peak breadth is in 30 ± 10nm.
For the usage amount of heavy metal element in reduction quantum dot optical element, quanta point material is preferably green light quantum point,
And excitation source in combination is the blue light source for being coated with red fluorescence powder.
For reduce red light quantum point and green light quantum point mixing when produce self-absorption, reduce red light quantum point for green glow
Absorption so that increase light utilization efficiency, reduce quantum dot consumption, the present invention embodiment, in quantum dot optics
In the transparent polymer part of element, glass tube and tool with red light quantum point dispersion are disposed with along along light direction
There is the glass of green light quantum point dispersion.When blue light exciting light from incidence surface by entering quantum dot light emitting element, feux rouges amount
Son point is excited and launches feux rouges, because green light quantum point can not be excited by feux rouges on light direction, so as to be prevented effectively from certainly
Absorb.
According to the specific embodiment of the present invention there is provided a kind of backlight module, backlight module include light-emitting component and
Quantum dot optical element, backlight module also includes other optical modules, and other optical modules include light guide plate, reflective membrane etc..The back of the body
Optical mode group can be applied in multiple fields, can specifically include mobile phone, TV, tablet personal computer, notebook computer, car-mounted display
Deng.In one preferred embodiment, light-emitting component includes blue-ray LED.
Embodiment 1
The structure of the backlight module of embodiment 1 is as shown in Fig. 2 backlight module 200 includes light-emitting component 10, quantum dot optics
Element 20 and light guide plate 50, quantum dot optical element 20 are arranged at the incidence surface of light guide plate 50.Quantum dot optical element 20 is wrapped
Include two glass tubes 21, the quantum dot dispersion 22 of the inside of glass tube 21 and the transparent polymer being arranged on outside glass tube
It is symmetrical arranged centered on part 23, the plane of symmetry of two glass tubes 21 in the axial direction, two between the outer wall of glass tube 21
Distance be 1 millimeter, quantum dot dispersion 32 be the hybrid dispersions containing feux rouges and green light quantum point, light-emitting component 10 for indigo plant
Light LED.
Embodiment 2
The structure of the backlight module of embodiment 2 is as shown in figure 3, backlight module 200 includes light-emitting component 10, quantum dot optics
Element 30 and light guide plate 50, quantum dot optical element 30 are arranged at the incidence surface of light guide plate 50.Quantum dot optical element 30 is wrapped
Include two glass tubes 31, the quantum dot dispersion 32 of the inside of glass tube 31 and the transparent polymer being arranged on outside glass tube
It is symmetrical arranged and tangent, the pipe thickness of glass tube centered on part 33, the plane of symmetry of two glass tubes 31 in the axial direction
For 0.5 millimeter, quantum dot dispersion 32 is the hybrid dispersions containing feux rouges and green light quantum point, and light-emitting component 10 is blue light
LED。
Embodiment 3
The structure of the backlight module of embodiment 3 is as shown in figure 4, backlight module 200 includes light-emitting component 10, quantum dot optics
Element 40 and light guide plate 50, quantum dot optical element 40 are arranged at the incidence surface of light guide plate 50.Quantum dot optical element 40 is wrapped
The multiple glass tubes 41 for including transparent polymer part 43 and being dispersed therein, along on light direction, being disposed with has
The glass tube of red light quantum point dispersion 421 and the glass tube with green light quantum point dispersion 422, light-emitting component 10 are blue light
LED。
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in protection scope of the present invention.
Claims (13)
1. a kind of quantum dot optical element, the quantum dot optical element includes at least one glass tube, is arranged on the glass
Quantum dot dispersion inside pipe and the transparent polymer part being arranged on outside the glass tube, it is characterised in that described
Transparent polymer part includes incidence surface, side and the exiting surface being oppositely arranged with the incidence surface, the incidence surface and institute
State that exiting surface is in curved surface along light direction projection, the light direction refers to the incidence surface towards the direction of the exiting surface.
2. quantum dot optical element according to claim 1, it is characterised in that the incidence surface and the exiting surface curved surface
It is parallel.
3. quantum dot optical element according to claim 1, it is characterised in that the incidence surface area is less than the light extraction
Face area.
4. quantum dot optical element according to claim 1, it is characterised in that the quantum dot optical element is included at least
Two glass tubes, the glass tube is uniformly distributed in the quantum dot optical element.
5. quantum dot optical element according to claim 1, it is characterised in that the quantum dot optical element is along axis side
To the plane of symmetry 0.5 millimeter of both sides within be not provided with the quantum dot dispersion, the axis refers to the quantum dot light
The line of element both ends of the surface central point is learned, the end face is vertical with the side.
6. quantum dot optical element according to claim 5, it is characterised in that the quantum dot optical element includes two
Glass tube, described two glass tubes are symmetrical centered on the plane of symmetry in the axial direction of the quantum dot optical element.
7. quantum dot optical element according to claim 6, it is characterised in that described two glass tubes are tangent.
8. quantum dot optical element according to claim 1, it is characterised in that the glass tube includes being arranged on two ends
Opening, the opening is provided with seal.
9. quantum dot optical element according to claim 1, it is characterised in that the glass tube two ends are close by sintering
Envelope.
10. quantum dot optical element according to claim 1, it is characterised in that the quantum dot dispersion includes uniform
It is dispersed with the polymer substrate of quantum dot.
11. quantum dot optical element according to claim 1, it is characterised in that the quantum dot includes red light quantum point
At least one of with green light quantum point.
12. quantum dot optical element according to claim 1, it is characterised in that in the transparent polymer part, edge goes out
The glass tube with red light quantum point dispersion and the glass tube with green light quantum point dispersion are disposed with light direction.
13. a kind of backlight module, including light-emitting component, the quantum dot optical element of the neighbouring light-emitting component, it is characterised in that
Quantum dot optical element is as described in any in claim 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710358659.8A CN107065304A (en) | 2017-05-19 | 2017-05-19 | A kind of quantum dot optical element and backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710358659.8A CN107065304A (en) | 2017-05-19 | 2017-05-19 | A kind of quantum dot optical element and backlight module |
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| CN107065304A true CN107065304A (en) | 2017-08-18 |
Family
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| CN201710358659.8A Pending CN107065304A (en) | 2017-05-19 | 2017-05-19 | A kind of quantum dot optical element and backlight module |
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| CN104062807A (en) * | 2014-07-15 | 2014-09-24 | 纳晶科技股份有限公司 | Light-emitting unit and sideward light emitting type liquid crystal display with light-emitting unit |
| US20160104825A1 (en) * | 2014-10-08 | 2016-04-14 | Lg Display Co., Ltd. | Led package, backlight unit and liquid crystal display device |
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| CN204534303U (en) * | 2015-04-03 | 2015-08-05 | Tcl集团股份有限公司 | A kind of liquid crystal indicator and quantum dot backlight module |
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| CN106098906A (en) * | 2016-06-13 | 2016-11-09 | 青岛海信电器股份有限公司 | Quantum dot light emitting device packaging part, backlight module and liquid crystal indicator |
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