CN108288636A - A kind of organic light emitting apparatus - Google Patents
A kind of organic light emitting apparatus Download PDFInfo
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- CN108288636A CN108288636A CN201810055536.1A CN201810055536A CN108288636A CN 108288636 A CN108288636 A CN 108288636A CN 201810055536 A CN201810055536 A CN 201810055536A CN 108288636 A CN108288636 A CN 108288636A
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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
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
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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
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/852—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to a kind of organic light emitting apparatus.Several pixels including array distribution, each pixel includes at least the first sub-pixel and the second sub-pixel, first sub-pixel and the second sub-pixel all have micro-cavity structure, first sub-pixel includes the first microcavity length compensation layer, second sub-pixel includes the second microcavity length compensation layer, the thickness of first microcavity length compensation layer and the second microcavity length compensation layer is different so that the first sub-pixel sends out the different light of wave-length coverage with second sub-pixel.The present invention can select the light of specific wavelength to be enhanced by adjusting the microcavity length of different subpixel, the light of different colours can be obtained on different subpixel region, and due to the enhancing effect of microcavity effect, further increase luminous efficiency.In terms of preparation process, compared to by way of preparing sub-pixel of the different luminous zones to obtain different colours in different subpixel, technology difficulty substantially reduces.
Description
Technical field
The present invention relates to lighting technical fields, more particularly to a kind of organic light emitting apparatus.
Background technology
Organic light emission (Organic Light Emitting Diode, hereinafter referred to as OLED) illumination is solid-state lighting, is
Autonomous light emitting source has the characteristics that frivolous, face is luminous, ductility is good.But current OLED illuminations generally existing luminous efficiency is low
The problem of short life, and the demand of illumination polychrome conversion difficult to realize.The prior art generally uses more in order to solve the above problem
The mode of layer luminescent layer superposition can be obviously improved come the power consumption for promoting brightness, but illuminating in this way, and increase technology difficulty.Also from
Optics aspect carries out promotion brightness, prepares inside and outside optics respectively on substrate two sides and takes out film and promotes the light extraction efficiency of its device,
But the complexity and difficulty of technique can be increased in this way, especially interior removing layer such as grid, lenticule preparation process difficulty is big.If
It realizes that polychrome conversion needs to prepare different luminous zones in different subpixel areas, leads to evaporation process complex procedures, it is good
Rate reduces.
Invention content
Based on this, it is necessary to provide a kind of organic light emitting apparatus, can not increase using power consumption and OLED preparation processes
The problem of in the case of difficulty, improving the luminous efficiency of organic light emitting apparatus, and realizing the polychrome conversion of organic light emitting apparatus.
A kind of organic light emitting apparatus includes several pixels of array distribution, which is characterized in that each pixel is at least wrapped
Including the first sub-pixel and the second sub-pixel, first sub-pixel and second sub-pixel all have a micro-cavity structure, and described the
One sub-pixel include the first microcavity length compensation layer, second sub-pixel include the second microcavity length compensation layer, described first
Microcavity length compensation layer is different with the thickness of the second microcavity length compensation layer so that first sub-pixel and described second
Sub-pixel sends out the different light of wave-length coverage.
Above-mentioned organic light-emitting display device can select specific wavelength by adjusting the microcavity length of different subpixel
Light is enhanced, and can obtain the light of different colours on different subpixel region, and due to the enhancing effect of microcavity effect, into
One step improves luminous efficiency.In terms of preparation process, obtained compared to by preparing different luminous zones in different subpixel
The mode of the sub-pixel of different colours, technology difficulty substantially reduce.
First sub-pixel and second sub-pixel all have film layer structure identical in one of the embodiments,
Luminous zone, the luminous zone include at least blue light-emitting, green light emitting layer and the red light-emitting being superimposed along thicknesses of layers direction
Layer.
The identical luminescent color that can also realize different subpixel of the luminous plot structure of each sub-pixel of the present invention is different, can
Greatly simplify the preparation process of luminous zone.
In one of the embodiments, the organic light emitting apparatus be top light emitting structure, each pixel from top to
Bottom includes at least successively：
Top semitransparent cathode；
The luminous zone includes at least electron injecting layer, electron transfer layer, the blue light emitting successively from the top to the bottom
Layer, the green light emitting layer, the red light luminescent layer, hole transmission layer and hole injection layer；
Microcavity length compensation layer includes the first microcavity length compensation layer in first sub-pixel and is located at
The second microcavity length compensation layer in second sub-pixel；
Transparent anode layer includes at least the first subpixel anode being located in first sub-pixel and positioned at described second
The second subpixel anode in sub-pixel；Preferably, the thickness range of the anode is 10-20nm；
Reflection electrode layer forms microcavity with the top semitransparent cathode；The thickness model of the preferably described reflection electrode layer
It encloses for 100-150nm.
The first microcavity length compensation layer can enhance feux rouges in first sub-pixel in one of the embodiments,
Output intensity so that first sub-pixel sends out feux rouges；Preferably, the thickness range of the first microcavity length compensation layer
For 70-80nm.
The second microcavity length compensation layer can enhance green light in second sub-pixel in one of the embodiments,
Output intensity so that second sub-pixel sends out green light；Preferably, the thickness range of the second microcavity length compensation layer
For 35-45nm.
First subpixel anode and the second subpixel anode are mutual indepedent in one of the embodiments, so that institute
Stating the first sub-pixel and second sub-pixel can independently drive, to realize the conversion of luminescent color.
The sub-pixel of the present invention can independently drive, and the first sub-pixel and the second sub-pixel can send out different colours
The conversion of the different colours of organic light emitting apparatus may be implemented in light.
In one of the embodiments, the luminous zone be arranged to by the blue light-emitting, the green light emitting layer and
The light that the light that the red light luminescent layer is sent out exports after interfering is blue.
Further include third sub-pixel in one of the embodiments, there is third subpixel anode；The third sub-pixel
There is no the microcavity length compensation layer, directly export the light that the luminous zone is sent out so that the third sub-pixel sends out blue light.
In one of the embodiments, by by first sub-pixel, second sub-pixel and the third picture
Element is lighted simultaneously, can obtain the pixel for sending out white light.
First subpixel anode, the second subpixel anode and third subpixel anode in one of the embodiments,
Independently of each other so that first sub-pixel, the second sub-pixel and the third sub-pixel can independently drive, red to realize
The four colors conversion of light, green light, blue light and white light.
The first sub-pixel, the second sub-pixel and the third sub-pixel of the present invention all can independently drive, and each sub-pixel
The light of different colours can all be sent out, it can be achieved that polychrome conversion.
Description of the drawings
Fig. 1 is the pixel film layer structure schematic diagram of the organic light emitting apparatus in the embodiment of the present invention；
Fig. 2 is the schematic diagram for the driving circuit for being organic light-emitting display device in the embodiment of the present invention.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.Many details are elaborated in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of violating intension of the present invention, therefore the present invention is not limited by following public specific embodiment.
Fig. 1 is the pixel film layer structure schematic diagram of the organic light emitting apparatus in the embodiment of the present invention；Fig. 2 is of the invention
The schematic diagram of the driving circuit of organic light-emitting display device in embodiment.As illustrated in fig. 1 and 2, it is wrapped in organic light emitting apparatus 100
Several pixels 200 of array distribution are included, each pixel 200 includes at least the first sub-pixel 210 and the second sub-pixel 220.Referring to
Fig. 1, the first sub-pixel 210 and the second sub-pixel 220 all have micro-cavity structure.First sub-pixel 210 includes the first microcavity length
Compensation layer 211, the second sub-pixel 220 include the second microcavity length compensation layer 221, the first microcavity length compensation layer 211 and second
The thickness of microcavity length compensation layer 221 is different so that first sub-pixel 210 and second sub-pixel 220 send out wavelength
The different light of range.
It is to be appreciated that micro-cavity structure enables to the light of the specific wavelength resonant check in microcavity, by adjusting micro-
The depth of chamber can select the wavelength for needing to resonate, and realize the enhancing of light of particular color, can't increase power consumption.The present invention passes through
The microcavity length compensation layer of different-thickness is set so that the first sub-pixel 210 is different with the microcavity length of the second sub-pixel 220,
The light that different wavelength range can thus be enhanced, the different output of color is obtained in the first sub-pixel 210 and the second sub-pixel 220
Light.
As shown in Figure 1, each sub-pixel has an identical luminous zone 300 of film layer structure, i.e. the first sub-pixel 210 and the
Two sub-pixels 220 have the identical luminous zone of structure 300.Structure is identical refer to the material of film layer, microstructure, film layer distribution with
And thicknesses of layers is all just the same.Luminous zone 300 includes at least blue light-emitting 310, the green light being superimposed along thicknesses of layers direction
Luminescent layer 320 and red light luminescent layer 330.That is each sub-pixel of organic light emitting apparatus 100 of the invention has knot
When the consistent luminous zone of structure, i.e. the first sub-pixel 210 and the second sub-pixel 220 are without by microcavity enhancing, face should be all sent out
The consistent light of color, but since the first microcavity length compensation layer 211 is different with 221 thickness of the second microcavity length compensation layer so that
First sub-pixel 210 can send out the different light of color with the second sub-pixel 220.It therefore, need not be every when preparing luminous zone
Different luminous zones is prepared on a sub-pixel, the large area that luminous zone may be implemented disposably is prepared, and luminous zone is enormously simplified
Preparation process, reduce the technological requirement of luminous zone, improve preparation efficiency.
As shown in Figure 1, in one embodiment in the present invention, organic light emitting apparatus 100 is top light emitting structure, each picture
Element 200 includes at least successively from the top to the bottom：
Top semitransparent cathode 400；
Luminous zone 300 includes at least electron injecting layer 340, electron transfer layer 350, the indigo plant successively from the top to the bottom
Light luminescent layer 310, the green light emitting layer 320, the red light luminescent layer 330, hole transmission layer 360 and hole injection layer 370；
Microcavity length compensation layer, including the first microcavity length compensation layer 211 and the second microcavity length compensation layer 221；
Transparent anode layer 500 includes at least the first subpixel anode 510 and the second subpixel anode 520；
Reflection electrode layer 600 forms microcavity with the top semitransparent cathode 400.
The lower metal of work function may be used in top semitransparent cathode 400, and technique is prepared simply, and can realize height
Electron injection efficiency, such as aluminium Al, silver Ag, magnesium Mg, and higher light transmittance in visible-range can be taken into account.It is preferred that
Ground, top semitransparent cathode 400 is using silver Ag.
Transparent anode layer 500 generally use indium tin oxide ITO, thickness range 10-20nm.Preferably transparent anode layer
500 thickness is 20nm.In the present invention, transparent anode layer 500 has the function of certain microcavity length adjustment, from different thickness
The the first microcavity length compensation layer 211 and the second microcavity length compensation layer 221 of degree match, it is ensured that different sub-pixel output
The light of particular color.
First microcavity length compensation layer 211 and the second microcavity length compensation layer 221 are using indium tin oxide ITO.
Reflection electrode layer 600 is generally using the metal material with high reflectance and high work function, such as silver Ag, gold Au, aluminium
Al, copper Cu, nickel etc..And from the angle of optical reflection, the reflectivity of metallic film increases with the increase of thickness of metal film
Add, therefore the thicker metallic film of generally use is as reflection electrode layer.Preferably, use silver-colored Ag for reflection electrode layer, thickness
Ranging from 100-150nm.Further, the thickness of reflection electrode layer is 150nm.
In one embodiment of the present of invention, the first microcavity length compensation layer 211 is for enhancing feux rouges in the first sub-pixel 210
Output intensity so that the first sub-pixel 210 sends out feux rouges.Preferably, the thickness range of the first microcavity length compensation layer 211 is
70-80nm.Further, the thickness of the first microcavity length compensation layer 211 is 75nm.
Second microcavity length compensation layer 221 is used to enhance the output intensity of green light in the second sub-pixel 220 so that the second son
Pixel 220 sends out green light.Preferably, the thickness range of the second microcavity length compensation layer 221 is 35-45nm.Further, second
The thickness of microcavity length compensation layer 221 is 40nm.
Further, as shown in Figure 1, the first subpixel anode 510 and the second subpixel anode 520 are mutual indepedent so that
First sub-pixel 210 and second sub-pixel 220 can independently drive (referring to Fig. 2), to realize turning for luminescent color
It changes.
The second sub- picture that pixel 200 in the present invention has the first sub-pixel 210 that can send out feux rouges and sends out green light
Element 220.The first microcavity length compensation layer 211 and the second microcavity length compensation layer 221 that only need to be different by preparing thickness
It realizes.And is enhanced by microcavity, increase the efficiency of output light, but power consumption can't be increased.And 210 He of the first sub-pixel
Second sub-pixel 220 can realize independent driving so that pixel 200 can export feux rouges or green light, realize turning for color
It changes.
In one embodiment of the present of invention, luminous zone 300 is arranged to the blue light-emitting 310, the green luminescence
The light that the light that layer 320 and the red light luminescent layer 330 are sent out exports after interfering is blue.It is to be appreciated that general
Micro-cavity structure have inhibiting effect to blue light, and be easier in the wave-length coverage of feux rouges and green light realize microcavity enhancing.Therefore
The color of the output light of luminous zone script is adjusted to blue, can be exported in the case where being not provided with microcavity length compensation layer
Blue light is conducive to the output of blue light.
As depicted in figs. 1 and 2, organic light emitting apparatus 100 further include third sub-pixel 230, have third subpixel anode
530.Third sub-pixel 230 does not have microcavity length compensation layer, can directly export the light that luminous zone 300 is sent out so that third
Pixel 230 can send out blue light.
Further, white light can be obtained since feux rouges, green light and blue light shine simultaneously, it only need to be by the first sub- picture
Plain 210, second sub-pixel 220 and third sub-pixel 230 shine simultaneously, it will be able to pixel 200 be made to export white light.
The present invention has just obtained red green on a pixel only by the independent adjusting of the microcavity length to each sub-pixel
The light of Lan Baisi kind colors, while simplifying luminous zone preparation process.
Further, the first subpixel anode 510, the second subpixel anode 520 and third subpixel anode 530 are mutually only
It is vertical so that the first sub-pixel 210, the second sub-pixel 220 and third sub-pixel 230 can independently drive, to realize luminescent color
Conversion.
The present invention is driven by the independence of the first sub-pixel 210, the second sub-pixel 220 and third sub-pixel 230, Ke Yidan
Solely the first sub-pixel 210 of driving, the second sub-pixel 220 and third sub-pixel 230, can obtain feux rouges (by the first sub-pixel
210 outputs), green light (being exported by the second sub-pixel 220) and blue light (being exported by third sub-pixel 230), by the first sub-pixel
210, the second sub-pixel 220 and third sub-pixel 230 drive simultaneously can be obtained white light.Realize feux rouges, green light, blue light and white light
Mutually convert.The combination of different subpixel can also realize the conversion of the light of different colours.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of organic light emitting apparatus includes several pixels of array distribution, which is characterized in that each pixel includes at least
First sub-pixel and the second sub-pixel, first sub-pixel and second sub-pixel all have micro-cavity structure, described first
Sub-pixel includes the first microcavity length compensation layer, and second sub-pixel includes the second microcavity length compensation layer, and described first is micro-
Cavity length compensation layer is different with the thickness of the second microcavity length compensation layer so that first sub-pixel and second son
Pixel sends out the different light of wave-length coverage.
2. organic light emitting apparatus according to claim 1, which is characterized in that first sub-pixel and the second sub- picture
All there is element the identical luminous zone of film layer structure, the luminous zone to include at least the blue light emitting being superimposed along thicknesses of layers direction
Layer, green light emitting layer and red light luminescent layer.
3. organic light emitting apparatus according to claim 2, which is characterized in that the organic light emitting apparatus is top light-emitting junction
Structure, each pixel include at least successively from the top to the bottom：
Top semitransparent cathode；
The luminous zone, from the top to the bottom successively include at least electron injecting layer, electron transfer layer, the blue light-emitting,
The green light emitting layer, the red light luminescent layer, hole transmission layer and hole injection layer；
Microcavity length compensation layer includes the first microcavity length compensation layer in first sub-pixel and is located at described
The second microcavity length compensation layer in second sub-pixel；
Transparent anode layer includes at least the first subpixel anode being located in first sub-pixel and is located at the described second sub- picture
The second subpixel anode in element；Preferably, the thickness range of the transparent anode layer is 10-20nm；
Reflection electrode layer forms microcavity with the top semitransparent cathode；The thickness range of the preferably described reflection electrode layer is
100-150nm。
4. organic light emitting apparatus according to claim 3, which is characterized in that the first microcavity length compensation layer can increase
The output intensity of feux rouges in strong first sub-pixel so that first sub-pixel sends out feux rouges；Preferably, described first is micro-
The thickness range of cavity length compensation layer is 70-80nm.
5. organic light emitting apparatus according to claim 4, which is characterized in that the second microcavity length compensation layer can increase
The output intensity of green light in strong second sub-pixel so that second sub-pixel sends out green light；Preferably, described second is micro-
The thickness range of cavity length compensation layer is 35-45nm.
6. organic light emitting apparatus according to any one of claims 1-5, which is characterized in that first subpixel anode
It is mutual indepedent with the second subpixel anode so that first sub-pixel and second sub-pixel can independently drive, with reality
The conversion of existing luminescent color.
7. according to the organic light emitting apparatus described in any one of claim 2-5, which is characterized in that the luminous zone be arranged to by
The light that the light that the blue light-emitting, the green light emitting layer and the red light luminescent layer are sent out exports after interfering is
Blue.
8. organic light emitting apparatus according to claim 7, which is characterized in that further include third sub-pixel, there is third
Pixel anode；The third sub-pixel does not have the microcavity length compensation layer, directly exports the light that the luminous zone is sent out so that
The third sub-pixel sends out blue light.
9. organic light emitting apparatus according to claim 8, which is characterized in that by by first sub-pixel, described
Two sub-pixels and the third sub-pixel are lighted simultaneously, can obtain the pixel for sending out white light.
10. organic light emitting apparatus according to claim 9, which is characterized in that first subpixel anode, the second sub- picture
Plain anode and third subpixel anode are mutual indepedent so that first sub-pixel, the second sub-pixel and the third sub-pixel
It can independently drive, to realize that four colors of feux rouges, green light, blue light and white light are converted.
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| CN201810055536.1A CN108288636A (en) | 2018-01-19 | 2018-01-19 | A kind of organic light emitting apparatus |
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| CN108962958A (en) * | 2018-07-27 | 2018-12-07 | 武汉天马微电子有限公司 | Display panel, display device and manufacturing method of display panel |
| CN109103236A (en) * | 2018-09-25 | 2018-12-28 | 京东方科技集团股份有限公司 | A kind of organic light emitting display substrate, display device and preparation method thereof |
| CN110120409A (en) * | 2019-05-05 | 2019-08-13 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel |
| CN112993187A (en) * | 2021-02-08 | 2021-06-18 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel and preparation method thereof |
| WO2023206349A1 (en) * | 2022-04-29 | 2023-11-02 | 京东方科技集团股份有限公司 | Display panel and preparation method therefor, and display device |
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Application publication date: 20180717 |