CN104466027B - The micro-cavity structure of OLED and OLED - Google Patents
The micro-cavity structure of OLED and OLED Download PDFInfo
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- CN104466027B CN104466027B CN201410843134.XA CN201410843134A CN104466027B CN 104466027 B CN104466027 B CN 104466027B CN 201410843134 A CN201410843134 A CN 201410843134A CN 104466027 B CN104466027 B CN 104466027B
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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
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having a potential-jump barrier or a surface barrier
- H10K10/80—Constructional details
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- H—ELECTRICITY
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- 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
- H10K59/10—OLED displays
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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
- H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
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- H—ELECTRICITY
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- 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
- H10K59/80—Constructional details
- H10K59/88—Dummy elements, i.e. elements having non-functional features
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
Abstract
The present invention relates to a kind of micro-cavity structure of OLED and OLED, wherein, the micro-cavity structure of described OLED includes some microcavity units, microcavity unit includes red microcavity and green microcavity, described redness microcavity corresponding and described green microcavity overlaps and connects, described green microcavity includes the first green sub- microcavity and the second green sub- microcavity, described second green sub- microcavity is on the described first green sub- microcavity, described redness microcavity includes the first red sub- microcavity and the second red sub- microcavity, the sub- microcavity dislocation red with second of described first red sub- microcavity is connected.In the micro-cavity structure of the OLED that the present invention provides and OLED, green microcavity is set to the structure with two kinds of differing heights, and by partly overlapping red microcavity and green microcavity, described micro-cavity structure is made to have more separations, thus improving the microcavity interference of light, thus reduce view angle dependency.
Description
Technical field
The present invention relates to technical field of flat panel display, particularly to a kind of micro-cavity structure of OLED and organic
Active display.
Background technology
OLED (English full name Organic Lighting Emitting Display, abbreviation OLED) is
A kind of new flat faced display because it have actively luminous, contrast height, fast response time, more frivolous many advantages, such as,
It is described as replacing Thin Film Transistor-LCD (English full name Thin Film Transistor liquid
Crystal display, abbreviation TFT-LCD) display of new generation.The principle of luminosity of OLED is to insert between the anode and cathode
Enter various functions layers, including electric charge injection layer, charge transport layer and luminescent layer etc., by applying suitable electricity in-between the electrodes
Pressure makes device light.
OLED can be divided into bottom emitting type OLED (BEOLED) and top emitting according to the difference of light radiation pattern
Type OLED (TEOLED).Wherein, the manufacturing process of TEOLED be first by opaque anode be grown in glass or
On silicon substrate, regrowth luminescent layer.When applying certain voltage to luminescent layer, light is penetrated from the transparent or semitransparent negative electrode at top
Go out.TEOLED has the high advantage of aperture opening ratio compared to BEOLED, is therefore widely used.
In order to meet chromaticity coordinates CIE (x, y) and the brightness requirement of product, top luminous organic display is generally sharp
Adjust light path with microcavity (Micro-cavity) structure, micro-cavity structure can produce microcavity effect and go out light with improve device
Rate, thus improve luminous efficiency and the brightness of OLED.Incorporated by reference to reference to Fig. 1 and Fig. 2, it is the organic light emitting display of prior art
The structural representation of the micro-cavity structure of device.As depicted in figs. 1 and 2, the micro-cavity structure 10 of existing OLED includes
Blue microcavity B, red microcavity R and the green microcavity G being independently arranged, wherein, blue microcavity B is used for assuming the outgoing of blue color spectrum
Light, red microcavity R is used for assuming the emergent light of red spectrum, and green microcavity G is used for assuming the emergent light of green spectral, red micro-
The width of chamber R is L1, length is W1, and the width of green microcavity G is L1, length is W2, and the width of blue microcavity B is L2, long
Spend for W1+W2, the height of blue microcavity B is H0 (not shown), the height of green microcavity G is H1, the height of red microcavity R
For H2, the height H1 of the generally higher than green microcavity G of height H2 of red microcavity R, the height H1 of green microcavity G are generally higher than blueness
The height H0 of microcavity B.
After the luminescent layer of OLED emits beam, light can produce multiple reflections in described micro-cavity structure 10, finally from going out
Penetrate side, that is, the negative electrode at top projects.In the process, by adjusting light path so that blue microcavity B, green microcavity G and red
The material of color microcavity R obtains optimized utilization, and greatly increase device goes out light intensity.And the adjustment of light path is mainly passed through to adjust
The height of whole blueness microcavity B, red microcavity R and green microcavity G is realizing.
However, although OLED can improve brightness using described micro-cavity structure 10, the microcavity of light is done
Relate to inevitable, the microcavity interference of light can affect viewing angle characteristic.When viewing angle changes, OLED bright
The display characteristics such as degree, chromaticity coordinates CIE (x, y) occur difference.Refer to Fig. 3, it is the OLED of prior art
R/G viewing angle characteristic simulation drawing.As shown in figure 3, when being observed between -30 ° to+30 ° of angular field of view, luminance difference typically exists
20% about.It can be seen that, when viewing angle changes, the brightness of OLED has obvious difference, therefore adopts
Existing micro-cavity structure 10 causes viewing angle characteristic poor, and during display, luminance difference is big.
Base this, how to solve the problems, such as that the viewing angle characteristic of existing OLED is poor, become people in the art
Member's technical problem urgently to be resolved hurrily.
Content of the invention
It is an object of the invention to provide a kind of micro-cavity structure of OLED and OLED, to solve
The certainly poor problem of the viewing angle characteristic of OLED in prior art.
For solving the above problems, the present invention provides a kind of micro-cavity structure of OLED, including some microcavity lists
Unit, described microcavity unit includes red microcavity and green microcavity, and described redness microcavity corresponding and described green microcavity overlaps and connects,
Described green microcavity includes the first green sub- microcavity and the second green sub- microcavity, and described second green sub- microcavity is located at described first
On the sub- microcavity of green, described redness microcavity includes the first red sub- microcavity and the second red sub- microcavity, and the described first red son is micro-
Chamber sub- microcavity red with second dislocation is connected, described first red sub- microcavity be placed on the described first green sub- microcavity and with described
Second green sub- microcavity correspondence connects.
Optionally, the height of described second green sub- microcavity is more than the height of the described first green sub- microcavity.
Optionally, described first green sub- microcavity and the second green sub- microcavity are constituted by material identical film layer.
Optionally, described redness microcavity is in step-like, and described green microcavity is in inverted T-shaped.
Optionally, the height of the height microcavity green with described second of described first red sub- microcavity is identical, and described
The height of two red sub- microcavitys is more than the height of the first green sub- microcavity.
Optionally, described first red sub- microcavity and the second red sub- microcavity are constituted by material identical film layer.
Optionally, also include blue microcavity, described blueness microcavity is adjacent with described redness microcavity and green microcavity, described indigo plant
The height of color microcavity is less than described green microcavity and the height of red microcavity.
Optionally, described some microcavity units are in that array is arranged.
Accordingly, present invention also offers a kind of OLED, described OLED includes a pixel
Array, described pel array includes some pixels, and each pixel is respectively provided with micro-cavity structure as above.
In sum, in the micro-cavity structure of the OLED that the present invention provides and OLED, will
Green microcavity is set to the structure with two kinds of differing heights, and by partly overlapping red microcavity and green microcavity, so that
Obtaining described micro-cavity structure and there are more separations, thus improving the microcavity interference of light, thus reducing view angle dependency.
Brief description
Fig. 1 is the top view of the micro-cavity structure of the OLED of prior art；
Fig. 2 is the side view of the micro-cavity structure of the OLED of prior art；
Fig. 3 is the R/G viewing angle characteristic simulation drawing of the OLED of prior art；
Fig. 4 is the side view of the micro-cavity structure of OLED of the present invention；
Fig. 5 is the top view of the micro-cavity structure of OLED of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of micro-cavity structure of OLED proposed by the present invention and
OLED is described in further detail.According to following explanation and claims, advantages and features of the invention will
Become apparent from.It should be noted that, accompanying drawing all in the form of very simplification and all using non-accurately ratio, only in order to convenient, bright
Aid in illustrating the purpose of the embodiment of the present invention clearly.
Refer to Fig. 4, it is the side view of the micro-cavity structure of OLED of the embodiment of the present invention.As Fig. 4 institute
Show, the micro-cavity structure 20 of described OLED includes some microcavity units, and microcavity unit includes red microcavity R and green
Microcavity G；Described green microcavity G is in inverted T-shaped, and described redness microcavity R is in step-like, and described redness microcavity R is corresponding and described
Green microcavity G overlaps and connects, and in the present embodiment, some microcavity units are in that array is arranged.
Specifically, described green microcavity G includes the first green sub- microcavity G1 and the second green sub- microcavity G2, and described second is green
On the first green sub- microcavity G1, it is inverted T-shaped that both form one to dice microcavity G2；It is red that described redness microcavity R includes first
Dice microcavity R1 and the second red sub- microcavity R2, described first red sub- microcavity R1 microcavity R2 dislocation red with second is connected,
I.e. described first red sub- microcavity R1 and the second red sub- microcavity R2 is in step-like arrangement, and described first red sub- microcavity R1 is placed in
On described first green sub- microcavity G1 and sub- microcavity G2 green with described second is corresponding connects.
As shown in figure 4, described second green sub- microcavity G2 and the first red sub- microcavity R1 is respectively positioned on described first green
Microcavity G1's is upper, and described second red sub- microcavity R2 is located at the side of the described first green sub- microcavity G1, the described first red son
Microcavity R1 is located between the described second green sub- microcavity G2 and the second red sub- microcavity R2.In the present embodiment, described first is green
The height of dice microcavity G1 is H1, and the height of the second green sub- microcavity G2 is H2, and the height of described green microcavity G is H1+H2, its
In, the height H2 of described second green sub- microcavity G2 is more than the height H1 of the described first green sub- microcavity G1, described redness microcavity R
Height identical with the height of green microcavity G, then the height of red microcavity R is also H1+H2, and wherein, the described first red son is micro-
The height H2 of the height of chamber R1 microcavity G2 green with described second is identical, therefore the height of the first red sub- microcavity R1 is H2, and
The height of the height microcavity R2 red with second of the first red sub- microcavity R1 is identical, therefore the height of described second red sub- microcavity R2
Spend for H2.
Wherein, described first green sub- microcavity G1, the second green sub- microcavity G2, the first red sub- microcavity R1 and second are red
The overall dimensions of sub- microcavity R2 can be configured in conjunction with actual demand, described first green sub- microcavity G1 and the second green sub- microcavity
The overall dimensions of G2 can identical can also differ, the profile of described first red sub- microcavity R1 and the second red sub- microcavity R2
Size equally can identical can also differ, and here is not limited.
In the present embodiment, described first green sub- microcavity G1 and the second green sub- microcavity G2 are by material identical film layer structure
Become, described first red sub- microcavity R1 and the second red sub- microcavity R2 is made up of material identical film layer.Micro- with respect to existing
Cavity configuration 10, the described separation stating in micro-cavity structure 20 red microcavity R and green microcavity G is more.Due to described microcavity knot
Structure 20 has height step, therefore, it is possible to improve the microcavity interference of light further, thus the luminance difference under reducing different visual angles, makes
User obtains more preferable visual experience.
Refer to Fig. 5, it is the top view of the micro-cavity structure 20 of OLED of the embodiment of the present invention.As Fig. 5
Shown, the micro-cavity structure 20 of described OLED also includes blue microcavity B, and described blueness microcavity B is micro- with described redness
Chamber R and green microcavity G is adjacent, and the height of described green microcavity G and red microcavity R is all higher than the height of described blueness microcavity B, shape
The A/F becoming the mask plate of red microcavity R is L1, and Opening length is W3；Form the opening width of the mask plate of green microcavity G
Spend for L1, Opening length is in W4；The A/F forming the mask plate of blue microcavity B is L2, and Opening length is W1+W2, wherein,
W1 is the Opening length of the existing mask plate forming red microcavity R, and W2 is opening of the existing mask plate forming green microcavity G
Mouth length.
As shown in figure 5, red microcavity R and green microcavity G combination formed a width be L1, length be the constitutional diagram of W1+W2
Shape, described green microcavity G and red microcavity R have an overlapping region (region shown in figure oblique line), the width of described overlapping region
Spend for L, length is W3+W4-W1-W2.
In the present embodiment, in described micro-cavity structure 20, the length of red microcavity R and green microcavity G is tied than existing microcavity
The length of the red microcavity R of structure 10 and green microcavity G is wide, therefore can reduce red microcavity R using described micro-cavity structure 20
Manufacture difficulty with green microcavity G.
Especially for the OLED of ultrahigh resolution, it is used for making the precision of the mask plate of micro-cavity structure
Require very high, the manufacturing cost of mask plate is very high, can reduce the manufacture difficulty of mask plate using described micro-cavity structure 20, from
And reduce manufacturing cost.
Accordingly, present invention also offers a kind of OLED, described OLED includes a pixel
Array, each pixel of described pel array is respectively provided with micro-cavity structure 20 as above.Specifically refer to above, herein no longer
Repeat.
To sum up, in the micro-cavity structure of OLED provided in an embodiment of the present invention and OLED,
Green microcavity G is set to the structure with two kinds of differing heights, and by partly overlapping red microcavity R and green microcavity G,
Making described micro-cavity structure 20 have more separations, thus improving the microcavity interference of light, thus reducing view angle dependency.
Meanwhile, the Opening length of the mask plate and the mask plate forming green microcavity G that form red microcavity R is all increased, and then drops
The difficulty of processing of low mask plate.
Foregoing description is only the description to present pre-ferred embodiments, not any restriction to the scope of the invention, this
Any change that the those of ordinary skill in bright field does according to the disclosure above content, modification, belong to the protection of claims
Scope.
Claims (8)
1. a kind of micro-cavity structure of OLED is it is characterised in that include some microcavity units, described microcavity unit bag
Include red microcavity and green microcavity, described redness microcavity corresponding and described green microcavity overlaps and connects, and described green microcavity includes
First green sub- microcavity and the second green sub- microcavity, described second green sub- microcavity on the described first green sub- microcavity, institute
State red microcavity and include the first red sub- microcavity and the second red sub- microcavity, described first red sub- microcavity is micro- with the second red son
Chamber dislocation connects, and described first red sub- microcavity is placed on the described first green sub- microcavity and sub- microcavity pair green with described second
Should connect；
Wherein, the height of described second green sub- microcavity is more than the height of the described first green sub- microcavity.
2. the micro-cavity structure of OLED as claimed in claim 1 is it is characterised in that described first green sub- microcavity
Sub- microcavity green with second is constituted by material identical film layer.
3. the micro-cavity structure of OLED as claimed in claim 1 is it is characterised in that described redness microcavity is in step
Shape, described green microcavity is in inverted T-shaped.
4. the micro-cavity structure of OLED as claimed in claim 1 is it is characterised in that described first red sub- microcavity
Height microcavity green with described second height identical, it is micro- that the height of described second red sub- microcavity is more than the first green
The height in chamber.
5. the micro-cavity structure of OLED as claimed in claim 1 is it is characterised in that described first red sub- microcavity
Sub- microcavity red with second is constituted by material identical film layer.
6. the micro-cavity structure of OLED as claimed in claim 1 is it is characterised in that also include blue microcavity, institute
State that blue microcavity is adjacent with described redness microcavity and green microcavity, the height of described blueness microcavity is less than described green microcavity and red
The height of color microcavity.
7. the micro-cavity structure of OLED as claimed in claim 1 is it is characterised in that described some microcavity units are in
Array is arranged.
8. it is characterised in that including a pel array, described pel array includes some pixels to a kind of OLED,
Each pixel is respectively provided with the micro-cavity structure as any one of claim 1 to 7.
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| CN108075047A (en) * | 2017-12-11 | 2018-05-25 | 合肥京东方光电科技有限公司 | Organic light emitting diode device and its manufacturing method, display panel |
| CN108493210B (en) * | 2018-03-09 | 2020-10-30 | 上海天马有机发光显示技术有限公司 | Organic light-emitting display panel and organic light-emitting display device thereof |
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| CN101661951A (en) * | 2008-08-29 | 2010-03-03 | 富士胶片株式会社 | Color display device and method for manufacturing the same |
| CN102610630A (en) * | 2011-12-08 | 2012-07-25 | 友达光电股份有限公司 | Pixel structure of electroluminescent display panel |
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| US7247394B2 (en) * | 2004-05-04 | 2007-07-24 | Eastman Kodak Company | Tuned microcavity color OLED display |
| JP5178088B2 (en) * | 2006-09-07 | 2013-04-10 | キヤノン株式会社 | Organic light emitting device |
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| CN101661951A (en) * | 2008-08-29 | 2010-03-03 | 富士胶片株式会社 | Color display device and method for manufacturing the same |
| CN102610630A (en) * | 2011-12-08 | 2012-07-25 | 友达光电股份有限公司 | Pixel structure of electroluminescent display panel |
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