CN106980208A - light controllable type quantum dot backlight - Google Patents
light controllable type quantum dot backlight Download PDFInfo
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- CN106980208A CN106980208A CN201710351650.4A CN201710351650A CN106980208A CN 106980208 A CN106980208 A CN 106980208A CN 201710351650 A CN201710351650 A CN 201710351650A CN 106980208 A CN106980208 A CN 106980208A
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- quantum dot
- light
- trickle
- controllable type
- backlight
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a kind of smooth controllable type quantum dot backlight, including the blue light source component and optical sheet stacked gradually, and the light inputting end face of the optical sheet is provided with quantum dot layer, and the light output end of the optical sheet is provided with micro-structural.The present invention, in optical sheet end face formation quantum dot convex lens, is improved spot light light efficiency and dispersion angle, increases the utilization rate of quanta point material using high-precision inkjet technology；According to light source in the light type of exiting surface, pixel size and density in trickle subregion are adjusted, the control to backlight uniformity is realized；The concentration of red green quantum dot ink, the relative scale and resolution distribution of red green quantum dot in trickle subregion are adjusted, the accurate control to outgoing photochromism, colour temperature and wavelength is realized；Shape, size and the depth of hyperfine microstructure optical sheet surface texture are adjusted, the design of combined high precision inkjet printing improves the overall light efficiency of light controllable type quantum dot backlight.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of smooth controllable type quantum dot backlight.
Background technology
As international IT industries are developed rapidly so that related LCD industries are constantly weeded out the old and bring forth the new, LCD product sizes are towards polynary
Change and the height development of lighting side.Backlight (BackLight) is that (a kind of light source of LCD behinds is LCD productions positioned at liquid crystal display
One of core component of product, its illumination effect will directly influence LCD MODULE LCM visual effects.Liquid crystal display
LCD does not light, it is necessary to by backlight in itself.Backlight in the market is mainly deactivated by blue-ray LED and fluoresced
Bisque or quantum dot layer realize white light, and the white light obtained due to blue-ray LED excitated fluorescent powder layer is shown not enough naturally, colour gamut is narrow
The low shortcoming of colour index, and the glow peak of quantum dot is narrow, it is ensured that the purity of light is high；The glow color of quantum dot is adjustable, can be real
Now higher colour gamut, and luminous efficiency is higher, and service life is longer.Therefore quantum dot backlight has become the heat of research
Door.
Because the colourity, colour temperature and wavelength of quantum dot backlight can be adjusted, quanta point material excited by blue light or
Excited self by electric current, it is very high photochromic to send purity, therefore, is also gradually widely used in plant lamp or illuminating lamp etc.
Field of light fittings.
Quantum dot photoluminescent techniques, current frame mode has two kinds：
Quantum Dot Glass pipe mode, is limited by the thickness and low deformability of glass tube, it is impossible to applied to curved surface TV, also without
Method is adapted to the requirement that display screen is increasingly thinned.
Quantum dot membrane technology, is produced by the way of coating, it is impossible to quick to carry out local fine regulation.While quantum dot material
The utilization rate reduction of material, use cost is higher.Be limited by the cost and yield of optics Obstruct membrane, the cost of whole quantum dot film compared with
It is high.
In the prior art using being uniformly distributed more than the quantum dot of quantum dot backlight, to the blue light source mixed light of varying strength
It is uneven, cause emergent light lack of homogeneity；And quantum dot can distribute substantial amounts of heat in mixed light, and the heat endurance of quantum dot
It is poor, quantum point failure can be caused when temperature is too high, causes the blue light ingredient for being directed through quantum dot to increase, makes backlight whole
Body is partially blue.
The content of the invention
The technical problems to be solved by the invention are：In order to overcome deficiency of the prior art, the present invention provides a kind of light
Controllable type quantum dot backlight, closes using inkjet technology and Microstructure Optics are hardened, improves the entirety of quantum dot backlight
Light efficiency.
The present invention solves its technical problem technical scheme to be taken：A kind of smooth controllable type quantum dot backlight, bag
The blue light source component and optical sheet stacked gradually is included, the light inputting end face of the optical sheet is provided with quantum dot layer, the optics
The light output end of plate is provided with micro-structural.Micro-structural carries out primary mixed light, the effect with guide-lighting and optically focused, prior art be by
Mixing quantum dot is uniformly coated in quantum dot film, and whole quantum dot film is placed in optical sheet light output end.
Quanta point material is directly finely sprayed at micro-structural plate incidence surface by the present invention, reduces the material knot of light process
Structure, shortens the path that light conducts, reduces the loss of light, improve the utilization rate of light, can effectively increase quanta point material
Efficiency of light absorption.Simultaneously according to light distribution, local fine design is carried out, can substantially increase quantum point efficiency, from
And reduce use cost.
Microstructure Optics plate, by the light diffusion effect of itself, plays a part of mixed light.Because quantum dot is directly arranged at
On incidence surface, micro-structural is set directly on exiting surface, and the light that blue light excites red green quantum dot to produce is directly over micro-structural
Mixed light, optically focused makes its light extraction more uniform, and exiting surface optical microstructures can play the effect of optically focused blast in addition, pass through
Rising angle is adjusted, expands quantum dot backlight lighting angle to a certain extent.
Further, the quantum dot layer is corresponding trickle point including several brightness different from the blue light source component
Quantum dot in area, the trickle subregion is formed by inkjet printing, and it is dense that the ink of quantum dot is formed in the trickle subregion
The brightness of the resolution ratio of the degree and quantum dot blue light source component corresponding with the trickle subregion is corresponding, and is directly proportional.
The resolution ratio of quantum dot in the present invention refers to the quantity of quantum dot in unit area.Quanta point material is excited or oneself by blue light
Body is excited by electric current, can send purity very high photochromic.When the corresponding blue light source component brightness of trickle subregion is higher, ink
Water concentration, the ratio of quanta point material and resolution ratio can be increased suitably, increase even light effect；When brightness is relatively low, ink is dense
Degree, the ratio of quanta point material and resolution ratio can suitably reduce, by adjust the concentration of red green quantum dot ink in trickle subregion,
The ratio and resolution distribution of different colours quanta point material, realize the accurate control to outgoing photochromism and wavelength.
Because red green quantum dot can produce substantial amounts of heat during blue light is converted into white light, heat radiation can be to amount
Son point brings luminescence queenching phenomenon, quantum dot light emitting efficiency is reduced, while the drift of color can also be brought by being influenced by temperature
Phenomenon；Therefore, the edge of the trickle subregion is provided with heat conducting circuit.
It is preferred that, the heat conducting circuit is graphene line, gold, silver, copper, polyaniline, polypyrrole, polythiophene etc., can be led
The metal or high polymer material of heat, and the material of ink can be made, it can be used as heat conducting circuit.
Specifically, the quantum dot layer includes red quantum dot and green quantum dot.
Specifically, the micro-structural is convex lens structures.The present invention micro-structural be utilize band structure roller, sheet material into
Suppressed during type in optics plate surface, the integral structure with sheet material.Compared with being placed in the lens on LED luminescence chips surface,
The structure of the present invention is finer, plays adjustment rising angle, assembles the effect of efficient intensity.Micro-structural convex lens structures can
Even light effect is more preferable.
It is preferred that, the thickness of the optical sheet is 0.3mm-3.0mm, using PMMA, PS, PC or PP with diffusion
Material.
Specifically, the blue light source component is directly-down light source, including backboard and the LED blue lights on backboard
Chip.
Specifically, the blue light source component is side entering type light source, including light guide plate and it is laterally positioned on light-guide edge
LED blue chips.
Further, the quantum dot layer surface is additionally provided with one layer of protection structure.Hold very much outside because quantum dot is directly exposed to
It is vulnerable to damage, the performance of integrated light source can be influenceed after damage, protection structure can be covered quantum dot layer using Obstruct membrane
Come, both met the requirement of printing opacity, and played a part of protection again, or other can meet the structure of light transmittance.
A kind of smooth controllable type quantum dot backlight that the present invention is provided has the advantages that：
(1) using high-precision inkjet technology, in optical sheet end face formation quantum dot convex lens, spot light light is improved
Effect and dispersion angle, increase the utilization rate of quanta point material；
(2) pixel size and density in trickle subregion are adjusted in the light type of exiting surface according to light source, realized to backlight
The control of uniformity；
(3) concentration, the ratio of different colours quanta point material and the resolution of red green quantum dot ink in trickle subregion are adjusted
Rate is distributed, and realizes the accurate control to outgoing photochromism, colour temperature and wavelength；
(4) shape, size and the depth of hyperfine microstructure optical sheet surface texture, combined high precision inkjet printing are adjusted
Design, improves the overall light efficiency of quantum dot backlight.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of preferred embodiment；
Fig. 2 is the structural representation of the trickle subregion of quantum dot layer of the present invention.
In figure：1st, blue light source component, 11, backboard, 12, LED blue chips, 2, optical sheet, 21, quantum dot layer, 211,
Heat conducting circuit, 212, the trickle subregions of A, 213, the trickle subregions of B, 214, the trickle subregions of C, 215, quantum dot, 22, micro-structural.
Embodiment
Presently in connection with accompanying drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
The basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
As shown in Figure 1-2, a kind of smooth controllable type quantum dot backlight of the invention, including the blue light source group stacked gradually
Part 1 and optical sheet 2, the light inputting end face of the optical sheet 2, which is provided with quantum dot layer 21, the light output end of the optical sheet 2, to be set
There is micro-structural 22, the micro-structural 22 is convex lens structures.Micro-structural 22 carries out primary mixed light, the work with guide-lighting and optically focused
With.The blue light source component 1, which also has, provides two kinds of structures of straight-down negative and side entering type in a variety of implementations, the present embodiment.Institute
Blue light source component 1 is stated for directly-down light source, including backboard 11 and the LED blue chips 12 on backboard 11.It is described
Blue light source component 1 can also be side entering type light source, including light guide plate and be laterally positioned on the LED blue chips of light-guide edge
12.The thickness of the optical sheet 2 is 0.3mm-3.0mm, using PMMA, PS, PC or PP material with diffusion.The amount
The son point surface of layer 21 is also provided with one layer of protection structure, the present embodiment directly overlaying on quantum dot layer 21 using Obstruct membrane
Protected.
As shown in Fig. 2 the quantum dot layer 21 is corresponding from the different brightness of the blue light source component 1 thin including several
Include in logical micro-partition, each trickle subregion in several red quantum dots 215 and several green quantum dots 215, the trickle subregion
Quantum dot 215 formed by inkjet printing, and the trickle subregion in formed quantum dot 215 body and quantum dot
The brightness of the 215 resolution ratio blue light source component 1 corresponding with the trickle subregion is corresponding, and is directly proportional.I.e. when trickle
When the corresponding brightness of blue light source component 1 of subregion is higher, body and resolution ratio can be increased suitably, when brightness is relatively low,
Body and resolution ratio can suitably reduce, by adjusting the concentration of the red green ink of quantum dot 215, resolution ratio point in trickle subregion
Cloth, realizes the accurate control to outgoing photochromism.As shown in Figure 2, it is the structural representation of the trickle subregion of quantum dot layer 21, figure
In four angles be the trickle subregions 212 of A, centre be the trickle subregions 214 of C, with the trickle subregions 214 of C close to for the trickle subregions 213 of B,
Assuming that the brightness of the corresponding blue light source component 1 of the trickle subregions 214 of C is maximum, reduce to periphery brightness, then in three kinds of trickle subregions
The descending order of resolution ratio of quantum dot 215 is the trickle subregions 214 of C, the trickle subregions 213 of B and the trickle subregions 212 of A.In Fig. 2
Trickle subregion be only schematic diagram, do not represent actual partitioning scenario, the shape and size of actual trickle subregion are blue by LED
The quantity of optical chip 12 and distribution are determined.
Because red green quantum dot 215 can produce substantial amounts of heat, heat radiation meeting during blue light is converted into white light
Luminescence queenching phenomenon is brought to quantum dot 215, the luminous efficiency of quantum dot 215 is reduced, while being influenced by temperature can also bring
The drift phenomenon of color；Therefore, the edge of the trickle subregion is provided with heat conducting circuit 211.It is preferred that, the heat conducting circuit 211
For graphene line, gold, silver, copper, polyaniline, polypyrrole, polythiophene etc., it is capable of the metal or high polymer material of heat conduction, and can
So that the material of ink is made, graphene heat conduction can be printed at the edge of trickle subregion in the present embodiment as heat conducting circuit
Circuit 211, the radiating for quantum dot layer 21.
The description of operation principle：
The blue light illumination sent of LED blue chips 12 is red on quantum dot layer 21 on the quantum dot layer 21 of optical sheet 2
Green quantum dot 215 is excited, and blue light is converted into white light, and the micro-structural 22 for being directly over optical sheet 2 carries out guide-lighting and primary
Mixed light, makes the colourity of emergent light more uniform, further improves the even results of the colourity of emergent light.
Because LED blue chips 12 are spot lights, therefore brightness and the number of LED blue chips 12 of the emergent ray sent
Measure and be distributed it is relevant, and in the present invention according to the quantity of LED blue chips 12 and distribution calculate in advance emergent light reach
The distribution of light shape and light on the incident end face of optical sheet 2, and trickle subregion is carried out to quantum dot layer 21 according to it, so as to obtain
The different multiple trickle subregions of shape size, then by inkjet printing by the red green ink printed of quantum dot 215 in each subregion
It is interior, and heat conducting circuit 211 is set at the edge of trickle subregion, radiated.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, pass through above-mentioned description, related staff
Various changes and amendments can be carried out in without departing from the scope of the present invention completely.The technical scope of this invention is not
It is confined to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (10)
1. a kind of smooth controllable type quantum dot backlight, it is characterised in that：Including the blue light source component (1) stacked gradually and optics
Plate (2), the light inputting end face of the optical sheet (2) is provided with quantum dot layer (21), and the light output end of the optical sheet (2) is provided with
Micro-structural (22).
2. light controllable type quantum dot backlight as claimed in claim 1, it is characterised in that：The quantum dot layer (21) is if include
The quantum dot (215) done in the corresponding trickle subregion of individual brightness different from the blue light source component (1), the trickle subregion leads to
Cross inkjet printing to be formed, and the body of quantum dot (215) and the resolution of quantum dot (215) are formed in the trickle subregion
The brightness of the rate blue light source component (1) corresponding with the trickle subregion is proportional.
3. light controllable type quantum dot backlight as claimed in claim 2, it is characterised in that：The edge of the trickle subregion is provided with
Heat conducting circuit (211).
4. light controllable type quantum dot backlight as claimed in claim 3, it is characterised in that：The heat conducting circuit (211) is stone
Black alkene, gold, silver, copper, polyaniline, polypyrrole or polythiophene.
5. light controllable type quantum dot backlight as claimed in claim 2, it is characterised in that：The quantum dot layer (21) includes red
Quantum dot (215) and green quantum dot (215).
6. light controllable type quantum dot backlight as claimed in claim 1, it is characterised in that：The micro-structural (22) is convex lens
Structure.
7. light controllable type quantum dot backlight as claimed in claim 1, it is characterised in that：The thickness of the optical sheet (2) is
0.3mm-3.0mm, using PMMA, PS, PC or PP material with diffusion.
8. light controllable type quantum dot backlight as claimed in claim 1, it is characterised in that：The blue light source component (1) is
Directly-down light source, including backboard (11) and the LED blue chips (12) on backboard (11).
9. light controllable type quantum dot backlight as claimed in claim 1, it is characterised in that：The blue light source component (1) is
Side entering type light source, including light guide plate and the LED blue chips (12) for being laterally positioned on light-guide edge.
10. the light controllable type quantum dot backlight as described in claim any one of 1-9, it is characterised in that：The quantum dot layer
(21) surface is additionally provided with one layer of protection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710351650.4A CN106980208B (en) | 2017-05-18 | 2017-05-18 | Light controllable quantum dot backlight source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710351650.4A CN106980208B (en) | 2017-05-18 | 2017-05-18 | Light controllable quantum dot backlight source |
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| CN106980208B CN106980208B (en) | 2023-04-14 |
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| CN110471210A (en) * | 2019-08-22 | 2019-11-19 | 京东方科技集团股份有限公司 | Color membrane substrates, display panel and display device |
| US11635658B2 (en) | 2019-08-22 | 2023-04-25 | Beijing Boe Display Technology Co., Ltd. | Color filter substrate, display panel and display apparatus |
| CN111627345A (en) * | 2020-06-09 | 2020-09-04 | 上海天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN111627345B (en) * | 2020-06-09 | 2022-05-03 | 上海天马微电子有限公司 | Display panel, manufacturing method thereof and display device |
| CN115167798A (en) * | 2022-07-26 | 2022-10-11 | 惠科股份有限公司 | Quantum dot optical simulation method, device and system and computer readable storage medium |
| CN115167798B (en) * | 2022-07-26 | 2023-06-13 | 惠科股份有限公司 | Quantum dot optical simulation method, device, system and computer readable storage medium |
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