CN204271086U - A kind of display screen body taking out structure containing light - Google Patents
A kind of display screen body taking out structure containing light Download PDFInfo
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- CN204271086U CN204271086U CN201420854328.5U CN201420854328U CN204271086U CN 204271086 U CN204271086 U CN 204271086U CN 201420854328 U CN201420854328 U CN 201420854328U CN 204271086 U CN204271086 U CN 204271086U
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Abstract
A kind of display screen body taking out structure containing light described in the utility model, comprise substrate, be successively set on the light of described surface and take out structure and pixel cell, described pixel cell comprise stack gradually setting the first electrode layer, organic function layer and the second electrode lay described in light take out structure.Described light takes out structure and comprises anti-crosstalk layer, and described anti-crosstalk layer forms continuous print network.Described light taking-up structure also comprises microcylinder light removing layer structure and the surface plasma light of device is extracted.Described first light takes out structure distribution in network.It is to improve light extraction efficiency that light takes out structure, and network is arranged on pixel edge and plays anti-crosstalk, further avoid light crosstalk between pixel, thus obtains the display screen body with higher definition, high-luminous-efficiency.
Description
Technical field
The utility model relates to field of organic electroluminescence, be specifically related to a kind of smooth extraction efficiency high and without crosstalk display screen body.
Background technology
Through the development of nearly 30 years, (English full name is OrganicLight Emitting Device to organic EL display panel body, referred to as OLED) as illumination of future generation and Display Technique, have that colour gamut is wide, response is fast, wide viewing angle, pollution-free, high-contrast, the advantage such as complanation, in illumination and display application to a certain extent.Typical display screen body generally comprises transparency carrier 1, first transparency electrode 3, second electrode 5 and is arranged on two interelectrode organic function layers 4.The negative electrode of illuminating OLED of the usual end is planar metal, has good reflecting effect.Due to the application of phosphor material, its internal quantum efficiency almost reaches theoretical limiting value 100%, but its external quantum efficiency only has about 20%, and the principal element that restriction external quantum efficiency improves further is the light extraction efficiency of device.In order to improve the light outgoing efficiency of OLED screen body, usually can design light in screen body and taking out structure.The scattering film of such as inner scattering layer, low-light grid or outside, lens coating etc.Above-mentioned design all can cause the serious diffuse reflection of screen surface, cannot apply on a display screen.
CN103700783A discloses a kind of optical grating construction taken out for Organic Light Emitting Diode (OLED) light, be provided with between glass substrate and transparent anode high low-index material be alternately arranged form lattice structure, the cross section of refraction materials is closed figure, wherein relative with glass substrate limit a is parallel to the limit b contacted with glass substrate, and 0≤a≤b (b ≠ 0); The refractive index of described high-index material is not less than 1.8, and the refractive index of described low-index material is not more than 1.5.This patent application is the light adding the optical grating construction taking-up waveguide mode that refractive index height replaces between glass substrate and OLED anode, adopts high-index material and substrate contacts to reduce total reflection, thus improves the efficiency of OLED or screen body.But the program is also mainly based on by grid, reduces total reflection scheme, grid solid matter.This structure grid easily causes light crosstalk between pixel, therefore cannot apply in display.
Normal light removing layer adopts the optical texture such as scattering or grating, by changing luminous direction, is extracted by the light of device inside.Such as, in CN03147098.X, improve light taking-up by adding scattering particles; Light taking-up is improved by changing surface topography for another KR20110035792; Also have in Nature photonics|VOL 2|AUGUST 2008, author proposes to adopt low refraction grid to take out to improve light.Be all from change light emission direction because above-mentioned, the light of script total reflection is extracted.But the change of light emission direction means light crosstalk between the pixel of screen surface, causes display unintelligible.
In oled light emission process, its loss includes that emission electrode surface plasmon modes, ITO and glass surface are launched entirely, glass and Air Interface total reflection etc.OLED light loss pattern comprises surface plasmon modes, the total reflection of ITO/Glass interface and substrate/air surface total reflection three kinds, specifically see light loss schematic diagram described in Figure 10, wherein a represents the total reflection of ITO/Glass interface, b represents surface plasmon modes light loss, and c represents substrate/air surface total reflection.Above-mentioned two parts of patent documentations are that solution ITO/Glass interface loss and substrate/air surface lose two kinds, less for surface plasmon modes loss research.
CN200410008012 discloses a kind of organic electroluminescent (EL) display device assembly and comprises substrate, organic EL portion, light loss preventing layer and microgap layer.Organic EL portion comprises the first electrode layer, organic luminous layer and the second electrode lay, and these layers are all patterned and on the upper surface of the substrate stacking.Light loss preventing layer is for improving light injection efficiency.Described smooth removing layer uses gas to fill or evacuated microgap layer, the diffraction grating that its multiple projections respectively with preset space length and predetermined altitude are formed, the figure Interval Distance of diffraction grating is 200nm-2000nm, be highly 50-5000nm, each projection can be different shape, as cylinder or polygonal pyramid body.The optical path change figure that the program is also is shown in Figure 11, and its goal of the invention is set out based on full transmitting of minimizing, and Structure of need is densely arranged.And refractive index has particular/special requirement, need the refractive index adopting height to replace, need to select high index of refraction material and low-refraction material respectively, have particular/special requirement to selection.
Summary of the invention
For this reason, to be solved in the utility model is solve existing light scheme of taking out easily to cause light crosstalk between pixel, the problem cannot applied in display pixel.The utility model provides a kind of display screen body taking out structure containing light, wherein light removing layer adopts microcylinder light removing layer structure or the surface plasma light of device is extracted taking out mode structure being arranged micropore, and this structure makes moderate progress to the crosstalk of pixel light to a certain extent.Taking out structure by arranging anti-crosstalk layer at pixel edge with the time, improving light crosstalk between pixel further, thus obtain the display screen body with higher definition, high-luminous-efficiency.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of display screen body taking out structure containing light, be included in some pixel cells that substrate is formed, pixel cell described in each comprises the first electrode layer, organic function layer and the second electrode lay that stack gradually setting, described pixel cell also comprises the light removing layer be arranged between described substrate and the second electrode lay, be provided with the some not homogeneity interface zones changing the second electrode reflecting interface planarization in described smooth removing layer, described not homogeneity interface zone accounts for the 0.1-30% of described smooth removing layer area; Preferably, described not homogeneity interface zone accounts for the 0.1-20% of described smooth removing layer area, preferably, and 0.5-10%, most preferably 0.5-5%.
Be provided with anti-crosstalk layer between adjacent described pixel cell, the height of described anti-crosstalk layer is more than or equal to the thickness of described smooth removing layer.
Described anti-crosstalk layer is black-matrix layer or layer of reflective material.
Described black-matrix layer is black-matrix layer is black photoresist layer, and described layer of reflective material is the inorganic salts material layer of metal reflective material layer or high reflectance.
Described smooth removing layer is the microcylinder light removing layer that some microcylinders are formed, and be white space between adjacent described microcylinder, not homogeneity interface zone described in described microcylinder formation.
Described smooth removing layer comprises light and takes out bulk material and take out in bulk material the some micropores arranged at light, not homogeneity interface zone described in described micropore is formed.
Described microcylinder or micropore are through described smooth removing layer, and the central axis of described microcylinder or micropore is in described substrate.
The cross section of described microcylinder or micropore is regular shape and/or irregularly shaped.
Beeline 0<d≤100 μm between adjacent described microcylinder or micropore.
The thickness of described smooth removing layer is 1-10000nm, preferred 10-3000nm.
Described organic luminous layer comprises one deck in hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and electron injecting layer or its combination;
Described smooth removing layer be arranged on arbitrary neighborhood in described substrate, the first electrode, hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and the second electrode lay two-layer between.
Described display screen body is top light-emitting mode, end light-emitting mode or white light+filter coating pattern.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) the utility model provides a kind of display screen body taking out structure containing light, wherein light removing layer is that employing microcylinder light removing layer structure or the mode arranging micropore on light removing layer make the surface plasma light of device be extracted, simultaneously by arranging anti-crosstalk layer at pixel edge, improve light crosstalk between pixel further, thus obtain the display screen body with higher definition, high-luminous-efficiency.So the external world enters the light of screen body, major part reflects away with mirror-reflection form, effectively reduces light crosstalk between the pixels, further increases the efficiency that light takes out.A large amount of test experiments checking shows, adopt the device containing this light removing layer, its light extraction efficiency can improve more than 20%.
(2) described smooth removing layer is intended to solve surface plasmon modes light loss, adopt microcylinder structure or micropore is set on light removing layer and form not homogeneity interface zone, the area of described microcylinder or micropore accounts for the 0.1-30% of light-emitting area, be preferably 0.1-20%, be preferably 0.5-10%, most preferably 0.5-5% again.This is because surface plasmon modes light is propagated along reflective electrode surface, and lateral transport distance is large, only need break reflecting electrode flatness in comparatively large-spacing, just can obtain better light taking-up effect.Therefore the formation arranged not the microcylinder of homogeneity interface zone or the area accounting of micropore considerably less, optimum accounting scope is 0.5-5%, and single size is less than the minimum resolution size of the corresponding service range of human eye.The material of light removing layer and refractive index etc., all without particular/special requirement, do not need the material of special height refraction or low refraction material, thus selection are more extensive.
(3) the utility model is by arranging anti-crosstalk layer, concrete employing black-matrix layer or reflector, the ambient light loss of light retrieval unit can be reduced, improve the light utilization efficiency of pixel cell, the contrast of organic light emitting display can be improved simultaneously, there is higher light extraction efficiency, have a wide range of applications.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein:
Fig. 1 is the structural representation that the utility model contains that light takes out the display screen body of structure;
Fig. 2 is the structural representation of the utility model second execution mode;
Fig. 3 is the end luminous OLED display screen taking out structure containing light;
Fig. 4 is the top-illuminating OLED display screen taking out structure containing light;
Fig. 5 is that the white light containing light taking-up structure adds CF structure OLED display screen;
Fig. 6 is the cross-sectional view of microcylinder;
Fig. 7 is the cross-sectional view of another execution mode of microcylinder;
Fig. 8 is the light removing layer cross-sectional view being provided with micropore;
Fig. 9 is microcylinder is the structural representation that hexagon is arranged;
Figure 10 is oled light loss pattern diagram;
Figure 11 is prior art light path schematic diagram;
In figure, Reference numeral is expressed as: 1-substrate, 2-first electrode layer, 3-light removing layer, 4-organic function layer, 5-second electrode, 6-microcylinder, 7-colored filter, 10-anti-crosstalk layer, 13-micropore.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, execution mode of the present utility model is described in further detail.
The utility model can be implemented in many different forms, and should not be understood to be limited to embodiment set forth herein.On the contrary, provide these embodiments, make the disclosure to be thorough and complete, and design of the present utility model fully will be conveyed to those skilled in the art, the utility model will only be limited by claim.In the accompanying drawings, for clarity, the size in layer and region and relative size can be exaggerated.Should be understood that, when element such as layer, region or substrate be referred to as " being formed in " or " being arranged on " another element " on " time, this element can be set directly on another element described, or also can there is intermediary element.On the contrary, when element is referred to as on " being formed directly into " or " being set directly at " another element, there is not intermediary element.
As shown in Figure 1, a kind of display screen body taking out structure containing light of the present utility model, comprise the some pixel cells formed on substrate 1, pixel cell described in each comprises the first electrode layer 2, organic function layer 4 and the second electrode lay 5 that stack gradually setting, described pixel cell also comprises the light removing layer 3 be arranged between described substrate and the second electrode lay 5, be provided with the some not homogeneity interface zones changing the second electrode reflecting interface planarization in described smooth removing layer 3, described not homogeneity interface zone accounts for the 0.1-30% of described smooth removing layer area; Preferred 0.1-20%, preferred to 0.5-10% further, most preferably 0.5-5%.
Be provided with anti-crosstalk layer 10 between adjacent described pixel cell, the height of described anti-crosstalk layer 10 is more than or equal to the thickness of described smooth removing layer 3.As shown in Figure 1, the height of described anti-crosstalk layer 10 is more than or equal to the thickness of described microtrabeculae shape light removing layer.First electrode layer 2 is arranged on the top of described substrate, and light removing layer, organic function layer 4 and the second electrode lay 5 are formed in above the first electrode structure.
Described anti-crosstalk layer 10 is black-matrix layer, is specially black photoresist layer, such as adopt the photoresist being dispersed with the material such as carbon black or organic black pigments, or the metal of black is as Cr etc.
The position of described smooth removing layer 3 is not particularly limited, between can be arranged between substrate and the second electrode two-layer arbitrarily.As shown in Figure 1, described smooth removing layer 3 is arranged between base first electrode layer 2 and organic function layer 4.Described organic function layer comprises hole injection layer, hole transmission layer, luminescent layer, electron injecting layer and electron transfer layer; Described microcylinder light removing layer is arranged between above-mentioned interface two-layer arbitrarily.The thickness of described smooth removing layer is 1-10000nm, preferred 10-3000nm.
As Figure 6-Figure 8, described smooth removing layer 3 is the microcylinder light removing layer that some microcylinders 6 are formed, and is white space between adjacent described microcylinder 6, not homogeneity interface zone described in described microcylinder 6 is formed.The shape of cross section of microcylinder does not specially require, and can be any regular shape or irregularly shaped, or regular shape and erose combination.When microcylinder 6 is for cylinder shown in Fig. 6, radius r≤50 μm of described institute cylinder, spacing d≤100 μm between adjacent described microcylinder 6 center line.When microcylinder 6 cross section is for triangle shown in Fig. 7, r≤50 μm of the circumscribed radius of triangle, adjacent described leg-of-mutton beeline d≤100 μm.The cross-sectional area of described microcylinder 6 is the 0.1-30% of light removing layer 3 Integral luminous area, preferred 0.5-10%, most preferably 0.5-5%.The material that described microcylinder 6 can be selected is not particularly limited, and can be any transparent and easy patterned electric conducting material or insulating material.Microcylinder structural area accounting is very little, then need not consider the conductivity and light transmittance etc. of material too much, can be arranged between any adjacent two layers between substrate and the second electrode lay.As another kind of execution mode, as shown in Figure 8, described smooth removing layer 3 comprises light and takes out bulk material and take out in bulk material the some micropores 13 arranged at light, not homogeneity interface zone described in described micropore 13 is formed.Micropore 13 is through described smooth removing layer 3, and its center line is perpendicular to described substrate 1.Light removing layer 3 setting position also can arbitrary neighborhood between substrate and the second electrode two-layer between.Light removing layer 3 arranging microcellular structure, because the interface of material own is comparatively large, as being arranged on ITO and glass surface, then selecting the material that light transmittance is higher; As being arranged on ITO and organic layer interface, then select the transparent material with certain conductivity.As being positioned at organic material interface, then select have the material of corresponding transmittability better.
Wherein microcylinder is cylinder, and described microcylinder adopts the hexagon arrangement mode shown in Fig. 7 to be optimal way.
Display screen body containing light taking-up structure of the present utility model is in preparation process, the preparation of the first electrode layer 1, organic function layer 4 and the second electrode lay 5 is this area routine techniques, when depositing microcylinder light removing layer, can by using mask plate deposition microcylinder.If light removing layer arranges micropore, be first deposit light removing layer 3, and then form micropore 13 by etching mode.
As other execution modes of the present utility model, microcylinder light removing layer can be multilayer.
As another kind of execution mode, as shown in Figure 2, anti-crosstalk layer 10 of the present utility model adopts reflecting material to prepare, and described layer of reflective material is metal reflective material, as Al, Mo, Cr etc., or the inorganic salts material of high reflectance, as barium sulfate etc.The height of described anti-crosstalk layer is colored filter 7, first electrode layer 2 and microcylinder light removing layer three thickness sum.
Figure 3 shows that the end luminous OLED display screen taking out structure containing light, anti-crosstalk layer 10 forms continuous print network on substrate, first electrode layer 2, microcylinder light removing layer, organic function layer and the second electrode lay 5 are formed in described network, the second electrode lay 5 is reflecting electrode, and the first electrode layer 2 is transparency electrode.First electrode layer 2 and light removing layer 3 are arranged in described network, and the height of described anti-crosstalk layer 10 equals the height of described pixel cell.
Figure 4 shows that the top-illuminating OLED display screen taking out structure containing light, anti-crosstalk layer 10 forms continuous print network on substrate 1, microcylinder light removing layer, the second electrode lay 5, organic function layer and the first electrode layer 2 are formed in described network, the second electrode lay 5 is reflecting electrode, and the first electrode layer 2 is transparency electrode.The height of described anti-crosstalk layer 10 equals the height of described pixel cell.
Fig. 5 is that the white light containing light taking-up structure variegates filter CF structure OLED display screen, anti-crosstalk layer 10 forms continuous print network on substrate 1, microcylinder light removing layer, the second electrode lay 5, organic function layer, the first electrode layer 2 and colored filter 7 are formed in described network, the second electrode lay 5 is reflecting electrode, first electrode layer 2 is transparency electrode, colored filter 7 is Red lightscreening plate, green color filter or blue color filter, and the height of described anti-crosstalk layer 10 equals the thickness sum of described first electrode layer 2 and colored filter 7.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among protection range of the present utility model.
Claims (10)
1. one kind is taken out the display screen body of structure containing light, be included in the upper some pixel cells formed of substrate (1), pixel cell described in each comprises the first electrode layer (2), organic function layer (4) and the second electrode lay (5) that stack gradually setting, it is characterized in that
Described pixel cell also comprises the light removing layer (3) be arranged between described substrate and the second electrode lay (5), be provided with the some not homogeneity interface zones changing the second electrode reflecting interface planarization in described smooth removing layer (3), described not homogeneity interface zone accounts for the 0.1-30% of described smooth removing layer area;
Be provided with anti-crosstalk layer (10) between adjacent described pixel cell, the height of described anti-crosstalk layer (10) is more than or equal to the thickness of described smooth removing layer (3).
2. take out the display screen body of structure according to claim 1 containing light, it is characterized in that, described anti-crosstalk layer (10) adopts black matrix" light-absorption layer or reflecting material matrix layer.
3. take out the display screen body of structure according to claim 2 containing light, it is characterized in that, described black-matrix layer is black photoresist layer, and described layer of reflective material is the inorganic salts material layer of metal reflective material layer or high reflectance.
4., according to the arbitrary described display screen body taking out structure containing light of claim 1-3, it is characterized in that, described not homogeneity interface zone accounts for the 0.1-20% of described smooth removing layer (3) area.
5. take out the display screen body of structure according to claim 4 containing light, it is characterized in that, the area of described not homogeneity interface zone accounts for the 0.5-10% of described smooth removing layer (3) area.
6. take out the display screen body of structure according to claim 5 containing light, it is characterized in that, the area of described not homogeneity interface zone accounts for the 0.5-5% of described smooth removing layer (3) area.
7. the display screen body of structure is taken out according to claim 1 containing light, it is characterized in that, the microcylinder light removing layer that described smooth removing layer (3) is formed for some microcylinders (6), be white space between adjacent described microcylinder (6), not homogeneity interface zone described in described microcylinder (6) is formed.
8. the display screen body of structure is taken out according to claim 1 containing light, it is characterized in that, described smooth removing layer comprises light and takes out bulk material and take out in bulk material the some micropores (13) arranged at light, not homogeneity interface zone described in described micropore (13) is formed.
9. according to claim 7 or 8, take out the display screen body of structure containing light, it is characterized in that, described organic luminous layer comprises one deck in hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and electron injecting layer or its combination;
Described smooth removing layer (3) be arranged on arbitrary neighborhood in described substrate (1), the first electrode (2), hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and the second electrode lay (5) two-layer between.
10. take out the display screen body of structure according to claim 9 containing light, it is characterized in that, described display screen body is top light-emitting mode, end light-emitting mode or white light+filter coating pattern.
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| CN106469788A (en) * | 2016-08-31 | 2017-03-01 | 昆山工研院新型平板显示技术中心有限公司 | A kind of Organic Light Emitting Diode and preparation method thereof |
| CN107579166A (en) * | 2017-08-31 | 2018-01-12 | 京东方科技集团股份有限公司 | Display panel, display device and display panel preparation method |
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| WO2022151628A1 (en) * | 2021-01-18 | 2022-07-21 | 深圳市华星光电半导体显示技术有限公司 | Oled display panel |
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| US10090487B2 (en) | 2015-04-23 | 2018-10-02 | Boe Technology Group Co., Ltd. | Thin film packaging structure, method for fabrication thereof and display device |
| US10581021B2 (en) | 2016-03-04 | 2020-03-03 | Boe Technology Group Co., Ltd. | Display substrate, manufacturing method thereof, and display panel |
| CN106469788A (en) * | 2016-08-31 | 2017-03-01 | 昆山工研院新型平板显示技术中心有限公司 | A kind of Organic Light Emitting Diode and preparation method thereof |
| CN107579166A (en) * | 2017-08-31 | 2018-01-12 | 京东方科技集团股份有限公司 | Display panel, display device and display panel preparation method |
| CN107579166B (en) * | 2017-08-31 | 2024-04-12 | 京东方科技集团股份有限公司 | Display panel, display device and display panel manufacturing method |
| CN107742676A (en) * | 2017-09-12 | 2018-02-27 | 上海天马有机发光显示技术有限公司 | A kind of organic electroluminescence display panel, its preparation method and display device |
| CN107742676B (en) * | 2017-09-12 | 2019-04-30 | 上海天马有机发光显示技术有限公司 | A kind of organic light emitting display panel, its production method and display device |
| CN110429196A (en) * | 2018-09-18 | 2019-11-08 | 广东聚华印刷显示技术有限公司 | The preparation method and display device of display device, display device |
| CN112802938A (en) * | 2021-01-05 | 2021-05-14 | 深圳市华星光电半导体显示技术有限公司 | Display device and preparation method thereof |
| WO2022151628A1 (en) * | 2021-01-18 | 2022-07-21 | 深圳市华星光电半导体显示技术有限公司 | Oled display panel |
| CN114512504A (en) * | 2022-01-28 | 2022-05-17 | 上海芯元基半导体科技有限公司 | Light crosstalk prevention Micro-LED chip structure, preparation method and Micro-LED display device |
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