CN110429102A - Dot structure and display device - Google Patents
Dot structure and display device Download PDFInfo
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- CN110429102A CN110429102A CN201811102766.5A CN201811102766A CN110429102A CN 110429102 A CN110429102 A CN 110429102A CN 201811102766 A CN201811102766 A CN 201811102766A CN 110429102 A CN110429102 A CN 110429102A
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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
- H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
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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 present invention relates to a kind of dot structure and display device, which includes multiple blue paxels, multiple yellow pixel groups, the first filter coating and the second filter coating；Blue paxel is made of the multiple blue subpixels arranged in the longitudinal direction, yellow pixel group is made of the multiple yellow sub-pixels arranged in the longitudinal direction, horizontally an adjacent blue paxel and a yellow pixel group form a mixed pixel group, multiple mixed pixel groups horizontally arrange, and in mixed pixel group, each blue subpixels are adjacent with the yellow sub-pixel that three are sequentially arranged, and the blue subpixels and three yellow sub-pixels form a pixel unit；The first filter coating is provided on the light direction of a yellow sub-pixel in each pixel unit, first filter coating is used to yellow light being changed into feux rouges, the second filter coating is provided on the light direction of another yellow sub-pixel in each pixel unit, the second filter coating is used to yellow light being changed into green light.
Description
Technical field
The present invention relates to field of display technology, more particularly to a kind of dot structure and display device.
Background technique
OLED, QLED device are prepared by ink-jet printing process, due to stock utilization height, being not necessarily to high vacuum condition
With fine mask version, be suitble to the advantages that preparing large-sized monitor, increasingly by the attention of display industry, be expected to become from now on
The prevailing technology of display manufacturing.
For ink-jet printing process, how to prepare with high-resolution display be main technological challenge it
One.The density for needing to increase rgb pixel with high-resolution print device is obtained, this means that reduce RGB sub-pixel
Size.And for InkJet printing processes, since there are the alignment errors between print head and substrate, printer driver
The influence of the Multiple factors such as kinematic error, the deviation of ink droplet flight angle (the case where deviateing vertical drop) of structure, ink droplet " are fallen
There are certain restrictions for point precision ".Therefore, to the size of reduction sub-pixel, and there are certain limit, the i.e. length of sub-pixel
Wide dimension cannot be below a limiting value, and the actual falling point that otherwise can generate ink droplet enters adjacent beyond target pixel region
Other subpixel areas, so as to cause occur colour mixture the problem of.
Summary of the invention
Based on this, it is necessary to a kind of dot structure and display device are provided, to reduce the precision to manufacturing equipment and technique
It is required that obtaining high-resolution display device.
A kind of dot structure, including multiple blue paxels, multiple yellow pixel groups, the first filter coating and second are filtered
Film；
The blue paxel is made of the multiple blue subpixels arranged in the longitudinal direction, and the yellow pixel group is by vertical
The multiple yellow sub-pixels arranged upwards are constituted, horizontally an adjacent blue paxel and a yellow picture
Element group one mixed pixel group of composition, multiple mixed pixel groups horizontally arrange, and in the mixed pixel group, often
A blue subpixels are adjacent with the yellow sub-pixel that three are sequentially arranged, the blue subpixels and three yellow
Pixel forms a pixel unit；
Described first is provided on the light direction of a yellow sub-pixel in each pixel unit to filter
Film, first filter coating is used to the yellow light that the yellow sub-pixel issues being changed into feux rouges, in each pixel unit
Second filter coating is provided on the light direction of another yellow sub-pixel, second filter coating is used for the Huang
The yellow light that sub-pixels issue is changed into green light.
A kind of display device, it includes above-mentioned dot structures.
Compared with existing scheme, the invention has the following advantages:
Above-mentioned dot structure, in each yellow pixel group in three yellow sub-pixels adjacent with same blue subpixels
Yellow light is changed into feux rouges by the first filter coating by one, three adjacent with same blue subpixels in each yellow pixel group
Yellow light is changed into green light by the second filter coating by another in yellow sub-pixel, thus with the blue subpixels and this three
Remaining yellow sub-pixel collectively constitutes RGBY pixel unit in a yellow sub-pixel.Above-mentioned pixel knot is made by inkjet printing
When the light emitting functional layer of structure, each blue paxel and each yellow pixel group can be formed respectively by once printing
The sub-pixel structure of multiple small sizes can reduce the required precision of printing device and technique, obtain high-resolution display device.
Detailed description of the invention
Fig. 1 is the schematic diagram of pixel arrangement in the dot structure of an embodiment；
Fig. 2 is the color conversion schematic diagram of the dot structure of an embodiment；
Fig. 3 is a pixel unit in traditional RGB stripe shape dot structure；
Fig. 4 is a pixel unit in the dot structure of an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
" transverse direction " as described herein and " longitudinal direction " represent two perpendicular directions, and " transverse direction " or " longitudinal direction " is not refered in particular to
A certain specific direction.
As shown in Fig. 1~2, the dot structure 100 of one embodiment of the invention, including multiple blue paxels, multiple yellow
Pixel group, the first filter coating 130 and the second filter coating 140.
Blue paxel is made of the multiple blue subpixels 110 arranged in the longitudinal direction.Yellow pixel group is by the longitudinal direction
Multiple yellow sub-pixels 120 of arrangement are constituted.Horizontally an adjacent blue paxel and a yellow pixel group composition
One mixed pixel group, multiple mixed pixel groups horizontally arrange, and in mixed pixel group, each blue subpixels 110
Adjacent with the yellow sub-pixel 120 that three are sequentially arranged, i.e. in a mixed pixel group, the quantity of blue subpixels 110 is yellow
Three times of the quantity of sub-pixels 120.The blue subpixels 110 and three yellow sub-pixels 120 form a pixel unit.
The first filter coating 130 is provided on the light direction of a yellow sub-pixel 120 in each pixel unit,
First filter coating 130 is used to the yellow light that the yellow sub-pixel 120 issues being changed into feux rouges.It is another in each pixel unit
The second filter coating 140 is provided on the light direction of one yellow sub-pixel 120, the second filter coating 140 is used for yellow
The yellow light that pixel 120 issues is changed into green light.
It is appreciated that the position of blue paxel (B) and yellow pixel group (Y) can be interchanged in mixed pixel group, so that
Horizontally, the arrangement mode of each pixel group can have infinite a variety of, such as BYBYBYBY ..., BYYBBYYB ...,
BYYBYBBY ..., etc..In the example depicted in fig. 1, blue paxel and yellow pixel group are horizontally alternately arranged, In
In transverse direction, in two adjacent mixed pixel groups blue paxel and yellow pixel group put in order it is identical.Show at another
In example, horizontally, the difference that puts in order of blue paxel and yellow pixel group in two adjacent mixed pixel groups, i.e., such as
On the arrangement mode of BYYBBYYB ... that enumerates, this arrangement mode can further decrease printing device and the precision of technique is wanted
It asks, improves resolution ratio.
Pixel arrangement in the present embodiment, at " impact accuracy " of ink droplet there are in the case where a limiting value, Neng Gouyou
Improve display resolution in effect ground.Specifically, it is illustrated by taking the pixel unit that the sub-pixel of rectangle is constituted as an example below.Such as Fig. 3
Shown in~4, at " impact accuracy " of ink droplet there are in the case where a limiting value d, when using traditional RGB stripe shape arrangement mode
When, the size (pitch) of a rgb pixel unit is equal to 3d+3x (x is the distance between sub-pixel).And use the present embodiment
Dot structure 100 and pixel arrangements when, the size of a RGBY pixel unit is equal to 2d+2x, and yellow sub-pixel
The distance between 120 is smaller, i.e., the distance between green sub-pixels and red sub-pixel for being correspondingly formed by discoloration reduce,
It is hereby achieved that higher pixel arrangement density, improves display resolution.
In addition, since yellow light is closer to white light, when needing to form white light, blue light and yellow light (B+Y) can be passed through
Combination obtains white light, compared in such a way that the combination of blue light, feux rouges and green light (B+R+G) forms white light, can reduce display
The power consumption of device.
When making the light emitting functional layer of above-mentioned dot structure 100 by inkjet printing, each blue paxel and each Huang
Color pixel group can such as be printed, primary printing one blue paxel or one respectively by once printing by continuous inkjet
A yellow pixel group, can form the sub-pixel structure 100 of multiple small sizes, and the precision that can reduce printing device and technique is wanted
It asks, obtains high-resolution display device.
It is appreciated that the TFT battle array with patterned pixel electrode is arranged in above-mentioned dot structure 100 in display device
On column substrate.
In a wherein example, yellow sub-pixel 120 issue light spectrum in include the first peak value and the second peak value,
Wherein, the first peak value is located in 490nm~550nm wave band, and the second peak value is located in 590nm~650nm wave band.
In this example, using the Yellow light emitting material with double emission peaks, two emission peaks are located at green light band
With red spectral band, sent out with the yellow light of the only one traditional emission peak (generally between 540~580nm) for being located at yellow band
Luminescent material is compared, by that can obtain more efficient green light and feux rouges after color conversion.This is because traditional only one
Green light band and red spectral band are although covered positioned at the luminescent spectrum of the Yellow light emitting material of the emission peak of yellow band, still
Strongest part is still in yellow band, so traditional Yellow light emitting material is green by obtaining after filter coating transformation color
Light is not strong with feux rouges, influences display effect.
Wherein, two peak values can be in the spectrum for the light that yellow sub-pixel 120 issues is generated by a kind of luminescent material,
It such as can be the yellow phosphorescence material containing Pt element；It is also possible to by two kinds of green light and the luminous materials to glow respectively
What material generated, such as can be the green phosphorescent material containing Ir element and the red phosphorescence material containing Ir element.
In addition, inventor has found during the test, in luminescent material luminescence process, the energy of blue light is higher, and pole holds
Energy is easily transferred to the lower feux rouges of energy level and green light, therefore blue light emitting material and other colour light emitting materials are mixed
Afterwards, illumination effect is bad, such as blue light emitting material and red emitting material, green light luminescent material are mixed in a sub- picture
In element, due to energy transfer, it is difficult to obtain the light for being simultaneously emitted by three kinds of colors of RGB and form white light.Using upper in this example
The Yellow light emitting material for the double emission peaks stated or green light and the luminescent material to glow are blended in a hair respectively by two kinds
In photosphere, since the energy level difference of two kinds of colors of green light and feux rouges is not very big, so easy to accomplish green light can be simultaneously emitted by
Yellow light is formed with two kinds of colors of feux rouges.
Wherein, optionally, the first filter coating 130 and the second filter coating 140 can be color conversion coatings film (color
Conversion film, abbreviation CCF) or photoresist (color filter, abbreviation CF) etc..Specifically, the first filter coating 130
It can be red color conversion film or green light photoresist, the green light band ingredient in the yellow light that yellow sub-pixel 120 is issued
Filtering stops, and red spectral band ingredient is allowed to pass through；Second filter coating 140 can be green tint conversion film or feux rouges photoresist, with
Red spectral band ingredient in the yellow light that yellow sub-pixel 120 is issued, which filters, to be stopped, and green light band ingredient is allowed to pass through.
In a wherein example, in the pixel unit, the area of each yellow sub-pixel 120 is respectively less than the sub- picture of blue
The area of element 110.Blue subpixels 110 have biggish area, to pass through biggish 110 Area Compensation of blue subpixels blue
The problem that 110 luminance of sub-pixel is low, the service life is relatively low.For example, in the pixel unit, the area of three yellow sub-pixels 120
And the area ratio 1:1:1:3 of blue subpixels 110.
In a wherein example, blue subpixels 110 and yellow sub-pixel 120 are rectangle, facilitate design, production.
As shown in Figure 1, being provided with the first pixel defining layer between two blue subpixels 110 adjacent in blue paxel
150, the second pixel defining layer 160, blue paxel are provided between two adjacent yellow sub-pixels 120 in yellow pixel group
Third pixel defining layer 170 is provided between yellow pixel group.
In a wherein example, the height of the first pixel defining layer 150 and the second pixel defining layer 160 is below third
The height of pixel defining layer 170.Wherein, the height of the first pixel defining layer 150 and the second pixel defining layer 160 can choose for
10nm~500nm, the height of third pixel defining layer 170 can choose as 500nm~1500nm.Third pixel defining layer 170
Height it is larger, to surround the ink crystallizing field of each pixel group, and can prevent ink overflow, lead to color cross-talk and drop
The problem of low display quality.
Further, in a wherein example, blue subpixels 110 have the first light emitting functional layer, the first light-emitting function
The height of layer is higher than the height of the first pixel defining layer 150 and is lower than the height of third pixel defining layer 170；Yellow sub-pixel
120 have the second light emitting functional layer, and the height of the second light emitting functional layer is higher than the height of the second pixel defining layer 160 and lower than the
The height of three pixel defining layers 170.
For ink-jet printing process, how to prepare the display with high homogeneity is also main technological challenge
One of.It is opposite to be easier to obtain by depositing to equally distributed material " vaporous cloud " in space on substrate in evaporation process
Obtain uniform film.And inkjet printing is that ink droplet is ejected into different pixel holes by hundreds and thousands of above nozzles, by
The parameters such as the volume, flying speed, flight angle for the ink droplet for ejecting each nozzle are unable to reach in current technology level
Keep height consistent, therefore, it is difficult to guarantee to print to the droplet volume in each pixel to keep identical.In addition, nozzle is for a long time
During continuous inkjet, nozzle operation state, which changes with time, will also result in the drift of the parameters such as droplet volume.Therefore, it
Printing OLED, QLED panel with excellent homogeneity is obtained, how to guarantee the ink droplet body in the different subpixel of same color
Long-pending consistency is a critical issue.
In view of the above-mentioned problems, in this example, the height of the first light emitting functional layer is higher than the height of the first pixel defining layer 150
Degree, the height of the second light emitting functional layer are higher than the height of the second pixel defining layer 160, i.e., in inkjet printing, ink is overflow respectively
The first pixel defining layer 150 and the second pixel defining layer 160 have been crossed, so that in blue paxel, different blue subpixels 110
The first light emitting functional layer upper surface between be continuous uniform, in yellow pixel group, the of different yellow sub-pixels 120
It is also continuous uniform between the upper surface of two light emitting functional layers, and good luminous function can be obtained between different subpixel
The consistency of ergosphere thickness obtains the display device with high uniformly light-emitting functional layer to be conducive to improve into film uniformity.
Further, in a wherein example, the surface of the first pixel defining layer 150 and the second pixel defining layer 160
In lyophily, in this example, when carrying out inkjet printing formation light emitting functional layer, ink can be in same blue paxel
It is flowed freely between the pixel hole of sub-pixel, and the free flow between the pixel hole of the sub-pixel in same yellow pixel group
It is dynamic, be conducive to further increase into film uniformity.
Further, in a wherein example, the surface of third pixel defining layer 170 is in lyophobicity.Ink-jet is carried out to beat
When impression is at light emitting functional layer, ink can be reduced across different pixel groups and cause the probability of colour mixture, and be conducive to further
Improve into film uniformity.
In a wherein example, axisymmetricly it is arranged between two adjacent blue subpixels 110 in blue paxel,
Axisymmetricly it is arranged between two adjacent yellow sub-pixels 120 in yellow pixel group, regular pixel arrangement can be formed, simultaneously
It is also possible that the ink volume of the sub-pixel in same pixel group be it is identical, be conducive to improve at film uniformity.
Further, present embodiment also provides a kind of display device, and it includes any of the above-described exemplary pixel knots
Structure 100.
Above-mentioned dot structure 100, the three yellow sub- pictures adjacent with same blue subpixels 110 in each yellow pixel group
Yellow light is changed into feux rouges by the first filter coating 130 by one in element 120, in each yellow pixel group with the same sub- picture of blue
Yellow light is changed into green light by the second filter coating 140 by another in plain 110 three adjacent yellow sub-pixels 120, thus
RGBY pixel is collectively constituted with remaining yellow sub-pixel 120 in the blue subpixels 110 and three yellow sub-pixels 120
Unit.When making the light emitting functional layer of above-mentioned dot structure 100 by inkjet printing, each blue paxel and each yellow picture
Element group can form the sub-pixel structure 100 of multiple small sizes, can reduce printing device and work respectively by once printing
The required precision of skill obtains high-resolution display device.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, 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, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and 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 protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of dot structure, which is characterized in that including multiple blue paxels, multiple yellow pixel groups, the first filter coating and
Second filter coating；
The blue paxel is made of the multiple blue subpixels arranged in the longitudinal direction, and the yellow pixel group is by the longitudinal direction
Multiple yellow sub-pixels of arrangement are constituted, horizontally an adjacent blue paxel and a yellow pixel group
A mixed pixel group is formed, multiple mixed pixel groups horizontally arrange, and in the mixed pixel group, Mei Gesuo
It is adjacent with the yellow sub-pixel that three are sequentially arranged to state blue subpixels, the blue subpixels and three yellow sub-pixels
Form a pixel unit；
First filter coating, institute are provided on the light direction of a yellow sub-pixel in each pixel unit
The first filter coating is stated for the yellow light that the yellow sub-pixel issues to be changed into feux rouges, another in each pixel unit
Second filter coating is provided on the light direction of the yellow sub-pixel, second filter coating is used for the yellow sub- picture
The yellow light that element issues is changed into green light.
2. dot structure as described in claim 1, which is characterized in that include in the spectrum for the light that the yellow sub-pixel issues
First peak value and the second peak value, first peak value are located in 490nm~550nm wave band, second peak value be located at 590nm~
In 650nm wave band.
3. dot structure as described in claim 1, which is characterized in that in the pixel unit, each yellow sub-pixel
Area be respectively less than the areas of the blue subpixels.
4. dot structure as described in claim 1, which is characterized in that first filter coating and second filter coating are color
Color conversion film or photoresist.
5. such as the described in any item dot structures of Claims 1 to 4, which is characterized in that adjacent two in the blue paxel
It is provided with the first pixel defining layer between a blue subpixels, adjacent two yellow in the yellow pixel group
It is provided with the second pixel defining layer between pixel, is provided with third pixel between the blue paxel and the yellow pixel group
Define layer, the height of first pixel defining layer and second pixel defining layer is below the third pixel defining layer
Highly.
6. dot structure as claimed in claim 5, which is characterized in that first pixel defining layer and second pixel circle
The height of given layer is 10nm~500nm, and the height of the third pixel defining layer is 500nm~1500nm.
7. dot structure as claimed in claim 5, which is characterized in that the blue subpixels have the first light emitting functional layer,
The height of first light emitting functional layer is lower than the height of the third pixel defining layer, and the yellow sub-pixel has the second hair
Light functional layer, the height of second light emitting functional layer are lower than the height of the third pixel defining layer.
8. dot structure as claimed in claim 7, which is characterized in that the height of first light emitting functional layer is higher than described the
The height of one pixel defining layer；And/or the height of second light emitting functional layer is higher than the height of second pixel defining layer
Degree.
9. dot structure as claimed in claim 7, which is characterized in that first pixel defining layer and second pixel circle
The surface of given layer is in lyophily；And/or the surface of the third pixel defining layer is in lyophobicity.
10. a kind of display device, which is characterized in that include dot structure as described in any one of claims 1 to 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811102766.5A CN110429102B (en) | 2018-09-20 | 2018-09-20 | Pixel structure and display device |
| PCT/CN2019/107065 WO2020057650A1 (en) | 2018-09-20 | 2019-09-20 | Pixel structure and display device |
| US17/276,386 US20220037413A1 (en) | 2018-09-20 | 2019-09-20 | Pixel structure and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811102766.5A CN110429102B (en) | 2018-09-20 | 2018-09-20 | Pixel structure and display device |
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| CN110429102A true CN110429102A (en) | 2019-11-08 |
| CN110429102B CN110429102B (en) | 2021-11-12 |
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| CN201811102766.5A Active CN110429102B (en) | 2018-09-20 | 2018-09-20 | Pixel structure and display device |
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| CN116193921A (en) * | 2023-01-30 | 2023-05-30 | 上海和辉光电股份有限公司 | Pixel arrangement structure, metal mask plate, display panel and display device |
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