CN106229418A - A kind of electro-luminescence display device and display device - Google Patents
A kind of electro-luminescence display device and display device Download PDFInfo
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- CN106229418A CN106229418A CN201610716458.6A CN201610716458A CN106229418A CN 106229418 A CN106229418 A CN 106229418A CN 201610716458 A CN201610716458 A CN 201610716458A CN 106229418 A CN106229418 A CN 106229418A
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- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/115—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising active inorganic nanostructures, e.g. luminescent quantum dots
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- 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]
Abstract
The invention discloses a kind of electro-luminescence display device, be provided with multiple pixel cell in described display device, each pixel cell includes multiple sub-pixel unit, and wherein, described display device includes: array base palte；It is arranged at the EL structure on described array base palte；Described EL structure includes that light emitting functional layer, the material of described light emitting functional layer are the quanta point material of emitting ultraviolet light；It is arranged at the color converting layer in described EL structure, described color converting layer includes multiple quantum dot region, each described quantum dot region corresponds to a sub-pixel unit, and described quantum dot region launches the light of corresponding sub-pixel unit color after the light sent by described EL structure excites；The ultraviolet light barrier layer being arranged on described color converting layer.The invention also discloses the display device comprising electro-luminescence display device described above.
Description
Technical field
The present invention relates to technical field of flat panel display, especially a kind of electro-luminescence display device and display device.
Background technology
Light emitting diode with quantum dots (QLED) display device because having that colour gamut is wide, the high and low power consumption of excitation, low cost, steady
Qualitative good, after the OLED (Organic Light Emitting Display, organic elctroluminescent device) that is described as continuing
A new generation's lighting display technology.
Quantum dot (Quantum Dots, QDs), can claim again nanocrystalline, is a kind of by II-VI group or iii-v element
The nano-particle of composition.The particle diameter of quantum dot is typically in the range of between 1～20nm, owing to electronics and hole are by quantum confinement, continuously
Band structure become the discrete energy levels structure with molecular characterization, fluorescence can be launched after being excited.The emission spectrum of quantum dot
Can be controlled by the size changing quantum dot, can be made it by the size and its chemical composition changing quantum dot
Emission spectrum covers whole visible region.
The fluorescence intensity of quantum dot and stability are all fine, at present, utilize the characteristics of luminescence of quantum dot, can be by quantum dot
It is applied to fluorescent labeling, it is also possible to be applied in display device, as the backlight module of liquid crystal display as molecular probe
Luminous source.The quanta point material being applied in liquid crystal display is mainly blue light quantum point material, is being excited by blue LED lamp
After the light that sends form white light with blue light colour mixture, it has bigger colour gamut, can improve picture quality.
At present, blue light quantum point material is as the quanta point material of luminescence generated by light, and its Performance comparision is stable, and luminescence generated by light does not has
There is the problem in terms of the life-span, the quantum dot TV commercialization of luminescence generated by light.But blue light quantum point material is as electroluminescent
The quanta point material of light, its poor-performing, to such an extent as to the life-span shorter (the most thousand of hours) of the blue light QLED device of preparation, far away
It is unable to reach the requirement preparing QLED full-color display.
Summary of the invention
The deficiency existed in view of prior art, the invention provides a kind of electro-luminescence display device and display device, uses
To improve display performance and the gamut range of QLED display device.
In order to achieve the above object, present invention employs following technical scheme:
A kind of electro-luminescence display device, is provided with multiple pixel cell, each described pixel list in described display device
Unit is respectively provided with the sub-pixel unit of multiple display different colours, and wherein, described display device includes:
Array base palte；
It is arranged on described array base palte and is positioned at the EL structure of each sub-pixel unit；Described electroluminescent
The first electrode that structure includes being successively set on described array base palte, hole transport functional layer, light emitting functional layer, electric transmission
Functional layer and the second electrode, the material of described light emitting functional layer is the quanta point material of emitting ultraviolet light；
Being arranged at the color converting layer in described EL structure, described color converting layer includes multiple quantum dot region, often
Quantum dot region described in one corresponds to a sub-pixel unit, and described quantum dot region is being sent by described EL structure
Light excite after launch the light of corresponding sub-pixel unit color；
The ultraviolet light barrier layer being arranged on described color converting layer.
Preferably, described ultraviolet light barrier layer includes the first barrier layer and second being successively set on described color converting layer
Barrier layer.
Preferably, the material on described first barrier layer is inorganic nano material, and the material on described second barrier layer is organic
Material.
Preferably, described inorganic nano material is TiO2Or ZnO nano material, described organic material is polyvinyl alcohol.
Preferably, the quanta point material of described emitting ultraviolet light is graphene quantum dot material.
Preferably, the material of described first electrode is transparent conductive oxide, and the material of described second electrode is metal.
Preferably, each described pixel cell includes red sub-pixel unit, green sub-pixels unit and blue subpixels
Unit, described color converting layer includes the red light quantum point region corresponding to described red sub-pixel unit, corresponding to described green
The green light quantum point region of sub-pixel unit and the blue light quantum point region corresponding to described blue subpixels unit.
Preferably, each described pixel cell also include yellow sub-pixel unit, described color converting layer also include corresponding to
The gold-tinted quantum dot region of described yellow sub-pixel unit.
Preferably, each described pixel cell also include white sub-pixels unit, described color converting layer also include corresponding to
The white light quanta point region of described white sub-pixels unit.
Present invention also offers a kind of display device, it includes driving module and electroluminescent display as above
Part, described driving module provides to described electro-luminescence display device and drives signal, so that described electro-luminescence display device shows
Show picture.
Beneficial effect:
A kind of electro-luminescence display device of embodiment of the present invention offer and display device, sending out in each sub-pixel unit
The material of light functional layer uses the quanta point material of emitting ultraviolet light, and ultraviolet light quanta point material can send the purple of efficient stable
Outer light, it has stable and the feature of life-span length as electroluminescent material.It is provided with corresponding color in each sub-pixel unit
Quantum dot region, described quantum dot region launches corresponding sub-pixel after the light sent by EL structure excites
The light of cell colors, owing to quantum dot emission spectrum is narrow and luminous efficiency is high, it is possible to increase each height of composition pixel cell
The excitation of pixel cell, thus improve the display quality of display device.Further, can due to the quanta particle in quantum dot region
The light sent with scattering EL structure, can improve the light transmittance of Color Conversion, thus improve the luminous effect of display device
Rate.Further, this display device is additionally provided with ultraviolet light barrier layer, can effectively absorb ultraviolet light, prevent ultraviolet light
Transmit, improve the display quality of display device.
Accompanying drawing explanation
Fig. 1 is the structural representation of the electro-luminescence display device that the embodiment of the present invention provides；
Fig. 2 is the structural representation of the display device that the embodiment of the present invention provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, the concrete reality to the present invention below in conjunction with the accompanying drawings
The mode of executing is described in detail.The example of these preferred implementations is illustrated in the accompanying drawings.Shown in accompanying drawing and according to
The embodiments of the present invention that accompanying drawing describes are merely exemplary, and the present invention is not limited to these embodiments.
Here, also, it should be noted in order to avoid having obscured the present invention because of unnecessary details, the most only
Show and according to the closely-related structure of the solution of the present invention and/or process step, and eliminate little with relation of the present invention
Other details.
The embodiment of the present invention provide firstly a kind of electro-luminescence display device, as it is shown in figure 1, described light-emitting display device
Including array base palte 1 and multiple pixel cells 2 of being arranged on array base palte 1, (Fig. 1 only embodiment is shown in which a picture
Element unit 2), each described pixel cell 2 is respectively provided with the sub-pixel unit of multiple display different colours, specific to the present embodiment
In, each described pixel cell 2 include red sub-pixel unit 21, green sub-pixels unit 22, blue subpixels unit 23 with
And yellow sub-pixel unit 24.
Specifically, on described array base palte 1, it is respectively arranged with corresponding to each sub-pixel unit 21,22,23,24
EL structure 3.Specifically, as it is shown in figure 1, described EL structure 3 includes being successively set on described array base palte 1
The first electrode 31, hole transport functional layer 32, light emitting functional layer 33, electric transmission functional layer 34 and the second electrode 35, institute
State the quanta point material that material is emitting ultraviolet light of light emitting functional layer 33.Wherein, the first electrode 31 generally anode, Ke Yiwei
Ito thin film (Indium Tin Oxides, tin indium oxide), generally transparency electrode, the second electrode 35 generally negative electrode, permissible
For metal level, according to the difference of EL structure 02 light direction, metal level can be translucent or opaque, certainly,
In the deformation of some other structure, the first electrode can be negative electrode, and the second electrode can be anode.Wherein, hole transport merit
Ergosphere (Hole Transport Layer, HTL) 32, light emitting functional layer (Emissive Layer, EML) 34, electric transmission merit
In ergosphere (Electron Transport Layer, ETL) 35, each functional layer can be more than one layer, or one layer, such as
Hole transport functional layer, can be subdivided into hole injection layer and hole transmission layer sometimes；Electric transmission functional layer, can be subdivided into
Electron transfer layer and electron injecting layer, but its function is close, therefore it is referred to as hole transport functional layer and electric transmission functional layer.Respectively
The material of the light emitting functional layer in individual sub-pixel unit uses the quanta point material of emitting ultraviolet light, ultraviolet light quanta point material energy
Enough sending the ultraviolet light of efficient stable, it has stable and the feature of life-span length as electroluminescent material.In the present embodiment,
The quanta point material of described emitting ultraviolet light is chosen as graphene quantum dot material.
Specifically, described EL structure 3 being provided with color converting layer 4, described color converting layer 4 includes multiple quantum dot
Region, each described quantum dot region corresponds to a sub-pixel unit, and described quantum dot region is by described electroluminescent
The light that structure 3 sends launches the light of corresponding sub-pixel unit color after exciting.Specific in the present embodiment, as it is shown in figure 1,
Due to each described pixel cell 2 include red sub-pixel unit 21, green sub-pixels unit 22, blue subpixels unit 23 with
And yellow sub-pixel unit 24, therefore, described color converting layer 4 includes the red quantum corresponding to described red sub-pixel unit 21
Put region R, corresponding to the green light quantum point region G of described green sub-pixels unit 22, corresponding to described blue subpixels unit
The blue light quantum point region B of 23 and gold-tinted quantum dot region Y corresponding to described yellow sub-pixel unit 24.Red light quantum point
Including red light quantum point material in the R of region, it launches HONGGUANG after being excited by the light that described EL structure 3 sends；Green
Including green light quantum point material in the G of light quanta point region, it is launched after being excited by the light that described EL structure 3 sends
Green glow；Including blue light quantum point material in the B of blue light quantum point region, its light sent by described EL structure 3 swashs
Blue light is launched after Faing；Including gold-tinted quanta point material in gold-tinted quantum dot region Y, it is by described EL structure 3
The light gone out launches gold-tinted after exciting.Each sub-pixel of color converting layer 4 correspondence quantum dot region respectively, due to quantum dot emission light
Compose narrow and luminous efficiency is high, it is possible to increase the excitation of each sub-pixel unit of composition pixel cell, thus improve display
The display quality of device.Further, in the present embodiment, tetra-sub-pixel structures of RGBY, it is possible to achieve ultra-wide colour gamut shows, system
For going out full-color QLED display.
It should be noted that in some other embodiments, each described pixel cell 2 can also be only to include redness
Sub-pixel unit 21, green sub-pixels unit 22, blue subpixels unit 23, now, described color converting layer 4 then include corresponding to
The red light quantum point region R of described red sub-pixel unit 21, green light quantum point corresponding to described green sub-pixels unit 22
Region G and the blue light quantum point region B corresponding to described blue subpixels unit 23.It is also possible that each described pixel list
Unit 2 includes red sub-pixel unit 21, green sub-pixels unit 22, blue subpixels unit 23 and white sub-pixels unit,
Now, described color converting layer 4 then includes the red light quantum point region R corresponding to described red sub-pixel unit 21, corresponding to institute
State the green light quantum point region G of green sub-pixels unit 22, corresponding to the blue light quantum point district of described blue subpixels unit 23
Territory B and the white light quanta point region corresponding to described white sub-pixels unit.
Further, as it is shown in figure 1, described color converting layer 4 is also disposed with ultraviolet light barrier layer 5 and cover-plate glass 6.
Ultraviolet light barrier layer 5 can effectively absorb the ultraviolet light from color converting layer 4 transmission, prevent ultraviolet light transmission to display it
Outward, the display quality of display device is improved.Cover-plate glass 6 is tied mainly for the protection of each several part in electro-luminescence display device
Structure.
In the present embodiment, as it is shown in figure 1, described ultraviolet light barrier layer 5 includes being successively set on described color converting layer 4
The first barrier layer 51 and the second barrier layer 52.Wherein, the material on described first barrier layer 51 is chosen as inorganic nano material, institute
The material stating the second barrier layer 52 is organic material.The material on described first barrier layer 51 is preferably TiO2Or ZnO nano material,
It can play scattering, block ultraviolet and visible ray carries out the effect of light extraction, can improve the utilization rate of ultraviolet light
Light extraction efficiency with display.The material on described second barrier layer 52 is preferably used polyvinyl alcohol (PVA) composite.
The present embodiment additionally provides a kind of display device, as in figure 2 it is shown, described display device include driving module 100 with
And electro-luminescence display device 200, described driving module 100 provides to described electro-luminescence display device 200 and drives signal, with
Described electro-luminescence display device 200 is made to show picture.Wherein, described electro-luminescence display device 200 uses the present invention to implement
The electro-luminescence display device that example is provided.
In sum, the embodiment of the present invention provide a kind of electro-luminescence display device and display device, each sub-pixel
The material of the light emitting functional layer in unit uses the quanta point material of emitting ultraviolet light, and ultraviolet light quanta point material can send height
Imitating stable ultraviolet light, it has stable and the feature of life-span length as electroluminescent material.Arrange in each sub-pixel unit
Having the quantum dot region of corresponding color, it is right that described quantum dot region launches institute after the light sent by EL structure excites
The light of the sub-pixel unit color answered, owing to quantum dot emission spectrum is narrow and luminous efficiency is high, it is possible to increase composition pixel list
The excitation of each sub-pixel unit of unit, thus improve the display quality of display device.Further, due in quantum dot region
Quanta particle can scatter the light that EL structure sends, and can improve the light transmittance of Color Conversion, thus improve display
The luminous efficiency of part.Further, this display device is additionally provided with ultraviolet light barrier layer, can effectively absorb ultraviolet light,
Prevent ultraviolet light transmission out, improve the display quality of display device.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
The above is only the detailed description of the invention of the application, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the application principle, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (10)
1. an electro-luminescence display device, is provided with multiple pixel cell, each described pixel cell in described display device
It is respectively provided with the sub-pixel unit of multiple display different colours, it is characterised in that described display device includes:
Array base palte；
It is arranged on described array base palte and is positioned at the EL structure of each sub-pixel unit；Described EL structure
Including the first electrode being successively set on described array base palte, hole transport functional layer, light emitting functional layer, electric transmission function
Layer and the second electrode, the material of described light emitting functional layer is the quanta point material of emitting ultraviolet light；
Being arranged at the color converting layer in described EL structure, described color converting layer includes multiple quantum dot region, Mei Yisuo
Stating quantum dot region and correspond to a sub-pixel unit, described quantum dot region is at the light sent by described EL structure
The light of corresponding sub-pixel unit color is launched after exciting；
The ultraviolet light barrier layer being arranged on described color converting layer.
Electro-luminescence display device the most according to claim 1, it is characterised in that described ultraviolet light barrier layer includes successively
The first barrier layer being arranged on described color converting layer and the second barrier layer.
Electro-luminescence display device the most according to claim 2, it is characterised in that the material on described first barrier layer is nothing
Machine nano material, the material on described second barrier layer is organic material.
Electro-luminescence display device the most according to claim 3, it is characterised in that described inorganic nano material is TiO2Or
ZnO nano material, described organic material is polyvinyl alcohol.
Electro-luminescence display device the most according to claim 1, it is characterised in that the quantum dot material of described emitting ultraviolet light
Material is graphene quantum dot material.
Electro-luminescence display device the most according to claim 1, it is characterised in that the material of described first electrode is transparent
Conductive oxide, the material of described second electrode is metal.
7. according to the arbitrary described electro-luminescence display device of claim 1-6, it is characterised in that each described pixel cell bag
Including red sub-pixel unit, green sub-pixels unit and blue subpixels unit, described color converting layer includes corresponding to described red
The red light quantum point region of sub-pixels unit, corresponding to the green light quantum point region of described green sub-pixels unit with correspond to
The blue light quantum point region of described blue subpixels unit.
Electro-luminescence display device the most according to claim 7, it is characterised in that each described pixel cell also includes Huang
Sub-pixels unit, described color converting layer also includes the gold-tinted quantum dot region corresponding to described yellow sub-pixel unit.
Electro-luminescence display device the most according to claim 7, it is characterised in that each described pixel cell also includes white
Sub-pixels unit, described color converting layer also includes the white light quanta point region corresponding to described white sub-pixels unit.
10. a display device, it is characterised in that include driving module and as described in claim 1-9 is arbitrary electroluminescent
Light display device, described driving module provides to described electro-luminescence display device and drives signal, so that described electroluminescent shows
Show that device shows picture.
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| CN110148675A (en) * | 2019-05-09 | 2019-08-20 | 苏州星烁纳米科技有限公司 | Quantum dot light emitting unit, quantum dot light emitting device and display device |
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| CN111261665A (en) * | 2018-12-03 | 2020-06-09 | 昆山工研院新型平板显示技术中心有限公司 | Quantum dot light-emitting device, preparation method thereof and display device |
| CN111261666A (en) * | 2018-12-03 | 2020-06-09 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and display device |
| CN111261663A (en) * | 2018-11-30 | 2020-06-09 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and manufacturing method thereof |
| CN111430444A (en) * | 2020-04-30 | 2020-07-17 | 武汉华星光电半导体显示技术有限公司 | Quantum dot display panel and preparation method thereof |
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| CN106229418B (en) | 2018-04-13 |
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