CN110568654A - quantum dot color film and display device - Google Patents
quantum dot color film and display device Download PDFInfo
- Publication number
- CN110568654A CN110568654A CN201910768661.1A CN201910768661A CN110568654A CN 110568654 A CN110568654 A CN 110568654A CN 201910768661 A CN201910768661 A CN 201910768661A CN 110568654 A CN110568654 A CN 110568654A
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- quantum dot
- color film
- refractive index
- layer
- polymer layer
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- 239000002096 quantum dot Substances 0.000 title claims abstract description 99
- 229920000642 polymer Polymers 0.000 claims abstract description 58
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- 239000002861 polymer material Substances 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910021480 group 4 element Inorganic materials 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- 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
- G02F1/133553—Reflecting 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
- G02F1/1336—Illuminating devices
- G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Electroluminescent Light Sources (AREA)
- Optical Filters (AREA)
Abstract
The application discloses a quantum dot color film and a display device. The quantum dot color film comprises: a transparent substrate; a black matrix having a plurality of pixel openings disposed on a surface of the transparent substrate; at least a portion of the pixel openings contain a quantum dot polymer layer therein, the quantum dot polymer layer including a polymer matrix and quantum dots dispersed therein; the inner wall of the pixel opening containing the quantum dot polymer layer contains a low refractive index layer; the quantum dot polymer layer has a refractive index greater than a refractive index of the low refractive index layer. The low-refractive-index layer is arranged on the inner wall of the pixel opening, so that the absorption of the black matrix to the emitted light of the quantum dot polymer layer can be reduced, and the light conversion efficiency of the quantum dot color film is improved.
Description
Technical Field
The application relates to the field of display, in particular to a quantum dot color film and a display device.
background
The quantum dots have the advantages of narrow half-peak width, adjustable emission peak position and the like, and are widely used in display devices. For example, a quantum dot polymer material is generally used as a light conversion material for a color filter by filling an opening of a black matrix, and a display device based on the quantum dot color filter has a higher display color gamut than a conventional filter material.
However, since the contact surface between the quantum dot polymer layer and the side surface of the black matrix opening is larger, a larger part of light emitted by the quantum dot polymer layer is absorbed by the black matrix, and thus the light conversion efficiency of the quantum dot color film is lower.
disclosure of Invention
An object of the present application is to provide a quantum dot color film and a display device, so as to solve the problem that the light conversion efficiency of the quantum dot color film is low.
According to an aspect of the present application, there is provided a quantum dot color film, including: a transparent substrate; a black matrix having a plurality of pixel openings disposed on a surface of the transparent substrate; at least a portion of the pixel openings contain a quantum dot polymer layer therein, the quantum dot polymer layer including a polymer matrix and quantum dots dispersed therein; the inner wall of the pixel opening containing the quantum dot polymer layer contains a low refractive index layer; the quantum dot polymer layer has a refractive index greater than a refractive index of the low refractive index layer.
Preferably, the low refractive index layer comprises a polymer material.
Preferably, the refractive index of the polymer matrix is greater than the refractive index of the polymeric material.
preferably, the low refractive index layer has a thickness of between 50-200 nm.
Preferably, the thickness of the quantum dot polymer layer is substantially equal to the depth of the pixel opening.
Preferably, the side of the quantum dot polymer layer away from the transparent substrate is provided with an encapsulation layer.
Preferably, the quantum dot polymer layer in the pixel opening includes a first portion emitting a first light, and a second portion emitting a second light.
preferably, a color filter layer is further disposed between the quantum dot polymer layer and the transparent substrate.
According to another aspect of the present application, there is provided a display device including: the quantum dot color film comprises a backlight unit, the quantum dot color film and a liquid crystal layer between the backlight unit and the quantum dot color film.
According to another aspect of the present application, there is provided a display device including: a substrate having a plurality of pixel regions; an electroluminescent device in the pixel region; and the quantum dot color film faces the substrate, and the pixel opening of the quantum dot color film is arranged corresponding to the pixel region of the substrate.
the application has the following beneficial effects: the low-refractive-index layer is arranged on the inner wall of the pixel opening, so that the absorption of the black matrix to the emitted light of the quantum dot polymer layer can be reduced, and the light conversion efficiency of the quantum dot color film is improved.
Drawings
Fig. 1 is a schematic structural diagram of a quantum dot color film according to an exemplary embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a quantum dot color film according to an exemplary embodiment of the present disclosure;
Fig. 3 is a schematic structural diagram of a quantum dot color film according to an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a display device according to an exemplary embodiment of the present application;
Fig. 5 is a schematic structural diagram of a display device according to an exemplary embodiment of the present application.
Detailed Description
The technical solutions in the examples of the present application will be described in detail below with reference to the embodiments of the present application. It should be noted that the described embodiments are only some embodiments of the present application, and not all embodiments.
According to some exemplary embodiments of the present disclosure, as illustrated in fig. 1, a quantum dot color film 10 includes a transparent substrate 11, a black matrix 12 disposed on a surface of the transparent substrate 11, where the black matrix 12 includes a plurality of pixel openings 121, at least a portion of the pixel openings 121 includes a quantum dot polymer layer 13, and the quantum dot polymer layer 13 includes a polymer matrix and quantum dots dispersed therein; the inner wall of the pixel opening 121 including the quantum dot polymer layer 13 includes the low refractive index layer 14, and the refractive index of the quantum dot polymer layer 13 is greater than the refractive index of the low refractive index layer 14.
The black matrix 12 partitions the plurality of pixel openings 121 so that light emission between different pixel openings 121 is not affected each other. The quantum dot polymer layer 13 may emit light of another wavelength when excited by an external light source. Since total reflection is easily emitted when light propagates from a medium having a high refractive index to a medium having a low refractive index, total reflection of light is more easily generated when light propagates from the quantum dot polymer layer 13 to the low refractive index layer 14. The low refractive index layer 14 is used to reduce introduction of light emitted from the quantum dot polymer layer 13, thereby reducing absorption of light emitted from the quantum dot polymer layer 13 by the inner wall of the pixel opening 121, and further improving the light conversion efficiency of the quantum dot polymer layer 13.
The low refractive index layer 14 includes a polymer material.
the low refractive index layer 14 may be formed by coating, spraying, or ink-jetting. When the low refractive index layer is composed of a polymer material, the refractive index of the polymer material is smaller than that of the polymer matrix.
the low refractive index layer 14 has a thickness of between 50-200 nanometers.
The thickness of the quantum dot polymer layer 13 is preferably substantially equal to the depth of the pixel opening 121. That is, the quantum dot polymer layer 13 substantially fills the pixel opening 121.
The polymer matrix in the quantum dot polymer layer 13 may be polyacrylic resin, polyepoxy resin, polyamine resin, or polysilicon resin, etc. The quantum dots can be group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements or compounds, group I-III-VI compounds, group I-II-IV-VI compounds, perovskite compounds, or combinations thereof.
in one embodiment, as shown in fig. 2, the quantum dot color film 20 includes a transparent substrate 21 and a black matrix 22 disposed on a surface of the transparent substrate 21, where the black matrix 22 includes a plurality of pixel openings 221, at least some of the pixel openings 221 include a quantum dot polymer layer 23, an inner wall of the pixel opening 221 including the quantum dot polymer layer 23 includes a low refractive index layer 24, and a color filter layer 25 is further disposed between the quantum dot polymer layer 23 and the transparent substrate 21.
The inventor found in experiments that, in general, the light conversion efficiency of the quantum dots in the quantum dot polymer layer 23 to the excitation light emitted by the backlight cannot reach one hundred percent, that is, part of the excitation light can still pass through the quantum dot polymer layer 23, so that the light emitted from the pixel openings contains two lights: unconverted excitation light and light emitted by the quantum dots after excitation. Thus, the display effect cannot be achieved. However, by disposing the color filter layer 25 between the quantum dot polymer layer 23 and the transparent substrate 21, the unconverted excitation light can be selectively reduced or eliminated, so as to achieve the predetermined display effect.
Continuing with fig. 2, an encapsulation layer 26 is further disposed on a side of the quantum dot polymer layer 23 away from the transparent substrate 20, and the encapsulation layer 26 is used to seal the quantum dot polymer layer 23 in the pixel opening 221, so that damage to the quantum dots by an external environment is reduced, and the service life of the quantum dot color film is increased.
In one embodiment, as shown in fig. 3, the quantum dot color film 30 includes a transparent substrate 31, and a black matrix 32 disposed on a surface of the transparent substrate 31, where the black matrix 32 includes a plurality of pixel openings 321, at least some of the pixel openings 321 include a quantum dot polymer layer 33, an inner wall of the pixel opening 321 including the quantum dot polymer layer 33 includes a low refractive index layer 34, and a color filter layer 35 is further disposed between the quantum dot polymer layer 33 and the transparent substrate 31. The quantum dot polymer layer 33 includes a first portion 331 emitting a first light, and a second portion 332 emitting a second light. Some of the pixel openings 321 are not filled with the quantum dot polymer layer 33, so that, in use, light in the backlight can directly pass through the openings to form another pixel color in the display device. For example, the light emitted by the backlight may be blue light, while the first and second light are red and green, respectively.
according to another embodiment of the present application, as shown in fig. 4, a display device 4 is provided, where the display device 4 includes a quantum dot color film 40, a backlight 42 for providing light, and a liquid crystal layer 41 located between the backlight 42 and the quantum dot color film 40.
according to another embodiment of the present application, as shown in fig. 5, there is provided a display device 5, the display device 5 including a substrate 51 having a plurality of pixel regions 511, an electroluminescent device 512 located in the pixel regions 511; and a quantum dot color film 50 disposed facing the substrate 51, wherein a pixel opening 521 of the quantum dot color film 50 is disposed corresponding to the pixel region 511.
Although the present disclosure has been described and illustrated in greater detail by the inventors, it should be understood that modifications and/or alterations to the above-described embodiments, or equivalent substitutions, will be apparent to those skilled in the art without departing from the spirit of the disclosure, and that no limitations to the present disclosure are intended or should be inferred therefrom.
Claims (10)
1. A quantum dot color film, comprising:
A transparent substrate;
A black matrix having a plurality of pixel openings disposed on a surface of the transparent substrate;
At least a portion of the pixel openings contain a quantum dot polymer layer therein, the quantum dot polymer layer comprising a polymer matrix and quantum dots dispersed in the polymer matrix;
The inner wall of the pixel opening containing the quantum dot polymer layer is provided with a low refractive index layer;
The quantum dot polymer layer has a refractive index greater than a refractive index of the low refractive index layer.
2. The quantum dot color film of claim 1, wherein the low refractive index layer comprises a polymer material.
3. The quantum dot color film of claim 2, wherein the refractive index of the polymer matrix is greater than the refractive index of the polymer material.
4. The quantum dot color film of claim 1, wherein the thickness of the low refractive index layer is between 50 and 200 nm.
5. The quantum dot color film of claim 1, wherein the thickness of the quantum dot polymer layer is substantially equal to the depth of the pixel opening.
6. the quantum dot color film of claim 1, wherein a color filter layer is further disposed between the quantum dot polymer layer and the transparent substrate.
7. The quantum dot color film according to claim 1, wherein an encapsulation layer is disposed on a side of the quantum dot polymer layer away from the transparent substrate.
8. The quantum dot color film of claim 1, wherein the quantum dot polymer layer in the pixel opening comprises a first portion emitting a first light and a second portion emitting a second light.
9. A display device, comprising:
A backlight unit, a quantum dot color film as claimed in any one of claims 1 to 8, and a liquid crystal layer interposed between the backlight unit and the quantum dot color film.
10. A display device, comprising:
A substrate having a plurality of pixel regions;
An electroluminescent device in the pixel region;
The quantum dot color film according to any one of claims 1 to 8 facing the substrate, wherein a pixel opening of the quantum dot color film is disposed corresponding to a pixel region of the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768661.1A CN110568654A (en) | 2019-08-20 | 2019-08-20 | quantum dot color film and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768661.1A CN110568654A (en) | 2019-08-20 | 2019-08-20 | quantum dot color film and display device |
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| Publication Number | Publication Date |
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| CN110568654A true CN110568654A (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910768661.1A Pending CN110568654A (en) | 2019-08-20 | 2019-08-20 | quantum dot color film and display device |
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| CN (1) | CN110568654A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063269A (en) * | 2019-12-17 | 2020-04-24 | 深圳市华星光电半导体显示技术有限公司 | Display panel |
| CN114624917A (en) * | 2022-03-31 | 2022-06-14 | 深圳市华星光电半导体显示技术有限公司 | Color film substrate, display panel and display device |
| WO2023201637A1 (en) * | 2022-04-21 | 2023-10-26 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
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| CN108267883A (en) * | 2018-01-24 | 2018-07-10 | 京东方科技集团股份有限公司 | A kind of color membrane substrates, its production method and display panel |
| CN108845448A (en) * | 2018-06-25 | 2018-11-20 | 福州大学 | A kind of board structure for improving quantum stippling film and going out optical purity |
| CN110098242A (en) * | 2019-05-22 | 2019-08-06 | 京东方科技集团股份有限公司 | A kind of coloured silk film layer and preparation method thereof, display panel |
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2019
- 2019-08-20 CN CN201910768661.1A patent/CN110568654A/en active Pending
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| US20170269434A1 (en) * | 2015-11-05 | 2017-09-21 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Quantum dot color film substrate, manufacturing method thereof and lcd apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063269A (en) * | 2019-12-17 | 2020-04-24 | 深圳市华星光电半导体显示技术有限公司 | Display panel |
| CN114624917A (en) * | 2022-03-31 | 2022-06-14 | 深圳市华星光电半导体显示技术有限公司 | Color film substrate, display panel and display device |
| WO2023201637A1 (en) * | 2022-04-21 | 2023-10-26 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
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Application publication date: 20191213 |