CN207199626U - Top emitting display device - Google Patents
Top emitting display device Download PDFInfo
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- CN207199626U CN207199626U CN201720870311.2U CN201720870311U CN207199626U CN 207199626 U CN207199626 U CN 207199626U CN 201720870311 U CN201720870311 U CN 201720870311U CN 207199626 U CN207199626 U CN 207199626U
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Abstract
It the utility model is related to a kind of top emitting display device, including substrate, first electrode layer, light emitting functional layer, the first pixel defining layer, the second pixel defining layer, the second electrode lay, isolation buffer functional layer and encapsulation cover plate；The isolation buffer functional layer is located on the encapsulation cover plate and set towards the pixel cell, the isolation buffer layer has multiple isolation raised, and raised be engaged with first pixel defining layer and second pixel defining layer of the isolation further separates the adjacent pixel cell and the adjacent sub-pixel unit.In the top emitting display device, isolation projection can be engaged the luminous interference between adjacent same color sub-pixel in effectively cut-off top emitting display device with the first pixel defining layer, the second pixel defining layer, improve the display effect of display.
Description
Technical field
Display technology field is the utility model is related to, more particularly to a kind of top emitting display device.
Background technology
In information-intensive society, the display device as visual information transmission medium is fast-developing, and just towards it is lighter,
Thinner, more low energy consumption, more inexpensive and more preferable picture quality trend development.
Organic electroluminescent LED (OLED) has the advantages that self-luminous, reaction is fast, visual angle is wide, brightness is high, frivolous, amount
Sub- point luminescent diode (QLED) has that photochromic purity is high, luminous quantum efficiency is high, glow color is easily adjusted, service life length etc. is excellent
Point, it is two Main ways of current display device research.Using solution processing and fabricating OLED display and QLED displays
Technique has the advantages that cost is low, production capacity is high, is easily achieved large scale, is the important directions of following Display Technique development.Meanwhile
Printing technology is considered as to realize OLED and QLED low costs and the most effective approach of the full-color display of large area.
At present, in typography, generally concentrated in together by adjacent pixel and with the sub-pixel of same color, then
The optimization of structure 10 is defined by pixel, as shown in figure 1, being laid with driving tft array 12, passivation flatness layer on the substrate 11
13rd, hearth electrode 14, the first pixel defining layer 15 and second pixel defining layer 16 etc., the pixel of the optimization, which defines structure, can expand ink
The deposition region of water, so as to realize the preparation of high resolution display.But when using the display device structure of top emitting,
Because defining between the sub-pixel of adjacent same color is relatively thin, therefore there can be certain interference phenomenon between each other, cause to show
The display effect of device declines.
Utility model content
Based on this, it is necessary to provide a kind of top emitting display device that can prevent adjacent subpixels from interfering.
A kind of top emitting display device, including substrate, first electrode layer, light emitting functional layer, the first pixel defining layer, second
Pixel defining layer, the second electrode lay, isolation buffer functional layer and encapsulation cover plate；
The first electrode layer, the light emitting functional layer, first pixel defining layer, second pixel defining layer and
The second electrode lay forms multiple pixel cells on the substrate, and includes multiple sub-pixels in each pixel cell
Unit, pass through first pixel defining layer between the adjacent pixel cell or between the adjacent sub-pixel unit
Separate, and also pass through second pixel circle on first pixel defining layer between the adjacent pixel cell
Given layer separates；
The isolation buffer functional layer is located on the encapsulation cover plate and set towards the pixel cell, and the isolation is slow
Rushing layer has multiple isolation projections, and the isolation is raised to match with first pixel defining layer and second pixel defining layer
Conjunction further separates the adjacent pixel cell and the adjacent sub-pixel unit.
In one of the embodiments, the top emitting display device also includes auxiliary electrode layer, the auxiliary electrode layer
In the isolation projection, and positioned at the raised end of the isolation auxiliary electrode layer and the corresponding pixel defining layer it
On the second electrode lay be connected.
In one of the embodiments, the top emitting display device also includes flexible conductive layer, the flexible conductive layer
Between the auxiliary electrode layer and the second electrode lay.
In one of the embodiments, the flexible conductive layer is electroconductive organic film layer.
In one of the embodiments, there is driving tft array, the first electrode layer and the driving on the substrate
Tft array is connected.
In one of the embodiments, the light emitting functional layer is organic electroluminescent functional layer, quantum dot light emitting function
Layer or the organic electroluminescent functional layer and the quantum dot light emitting functional layer are combined the mixed luminescence functional layer to be formed.
In one of the embodiments, the light emitting functional layer in each pixel cell is integrally covered in first electricity
On first pixel defining layer in pole layer and the pixel cell；
The second electrode lay is integrally covered on the light emitting functional layer and second pixel defining layer.
In one of the embodiments, the auxiliary electrode layer is opaque metal film layer.
In one of the embodiments, the second electrode lay is translucent conductive metal film layer or transparent conduction
Metallic oxide film.
In one of the embodiments, the top emitting display device also includes packaging adhesive frame, and the packaging adhesive frame is located at
Between the substrate and the encapsulation cover plate, for sealing whole device.
Above-mentioned top emitting display device is included and first by setting on encapsulation cover plate and towards the side of pixel cell
Pixel defining layer and the second pixel defining layer, which are engaged, further separates adjacent pixel cell and adjacent sub-pixel unit
Multiple isolation it is raised, so as to the hair effectively in cut-off top emitting display device between adjacent same color sub-pixel on the whole
Light disturbs, and improves the display effect of display.
Further, above-mentioned top emitting display device is also provided with auxiliary electrode layer, auxiliary electricity on the raised surface of isolation
Pole layer is connected with the second electrode lay on corresponding pixel defining layer, and the setting of the auxiliary electrode layer can be with isolating projection
The luminous interference between the sub-pixel of adjacent same color in further effective cut-off top emitting display device is engaged, improves display
The display effect of device.Meanwhile the setting of the auxiliary electrode layer can make current flow through pressure drop caused by the second electrode lay and reduce,
For the display of large area, it is possible to increase the display brightness uniformity of display device.
Further, above-mentioned top emitting display device sets compliant conductive also between auxiliary electrode layer and the second electrode lay
Layer, the flexible conductive layer can be used as stress-buffer layer, reduce the damage to the second electrode lay when encapsulation cover plate is bonded with substrate,
Auxiliary electrode layer is connected by the flexible conductive layer with the second electrode lay, be can further improve the electric conductivity of the second electrode lay, is entered
One step improves the display brightness uniformity of display.
Brief description of the drawings
Fig. 1 is that the pixel of optimization routine defines structural representation；
Fig. 2 is the structure schematic diagram of the top emitting display device of an embodiment；
Fig. 3 is the partial enlargement structural representation of the top emitting display device in Fig. 2.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can come in fact in many different forms
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model
Open the understanding more thorough and comprehensive of content.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more related Listed Items.
Incorporated by reference to Fig. 2 and Fig. 3, the top emitting display device 20 of an embodiment, including substrate 100, first electrode layer
110th, the first pixel defining layer 121, the second pixel defining layer 122, light emitting functional layer 130, the second electrode lay 140, encapsulation cover plate
200 and isolation buffer functional layer.
In the present embodiment, there is driving tft array on substrate 100.Tft array can include non-crystalline silicon tft array,
Polycrystalline tft array and metal oxide tft array etc..
In the present embodiment, first electrode layer 110, the first pixel defining layer 121, the second pixel defining layer 122, luminous
Functional layer 130 and the second electrode lay 140 form multiple pixel cells on the substrate 100, and comprising multiple in each pixel cell
Sub-pixel unit, between adjacent pixel cell or between adjacent sub-pixel unit by the first pixel defining layer 121 every
Open, and between adjacent pixel cell also by the second pixel defining layer 122 on the first pixel defining layer 121 every
Open.Overall the first picture being covered in first electrode layer 110 and the pixel cell of light emitting functional layer 130 in each pixel cell
Element is defined on layer 121, and the second electrode lay 140 is overall to be covered on the pixel defining layer 122 of light emitting functional layer 130 and second.
Wherein, first electrode layer 110 is properly termed as hearth electrode or pixel electrode, and first electrode layer 110 is set in patterning
On the substrate 100, and by connecting hole with driving tft array it is connected.First pixel defining layer 121 defines the hair of each sub-pixel
Light region, its thickness can be 100-500nm, and in lyophily, it is good to ensure that typography ink has after depositing behind this region
Good spreadability, so as to form uniform liquid film.Second pixel defining layer 122 defines the ink deposition region of each sub-pixels,
Thickness can be 1000-5000nm, in lyophobicity, prevent ink and overflow the situation for causing different colours sub-pixel colour mixture,
Improve product yield prepared by typography.Preferably, the second pixel defining layer 122 connects from the first pixel defining layer 121
Tactile bottom to top is gradually narrowed, and can expand the deposition region of ink, improves the display effect of display device.
Light emitting functional layer 130 can be organic electroluminescent functional layer, including at least luminescent layer.Luminescent layer can be
One or more layers function film layer.Preferably, light emitting functional layer 130 includes hole injection layer, the hole biography being cascading
Defeated layer, electronic barrier layer, luminescent layer, exciton confining layers, hole blocking layer and electron injecting layer.In other embodiments, send out
Light functional layer 130 can also be quantum dot light emitting functional layer or organic electroluminescent functional layer and quantum dot light emitting functional layer phase
The mixed luminescence functional layer combined to form.
The second electrode lay 140 is alternatively referred to as top electrode, and the second electrode lay 140 is overall to be covered in the second pixel delimited area
122 and light emitting functional layer 130 on.The second electrode lay 140 can be transparent top electrode or translucent top electrode.Work as the second electrode lay
140 can be that the material such as aluminium, silver, magnesium silver alloy and aluminium silver alloy make the conductive metal film to be formed, translucent, and thickness can be with
For 15-25nm.When can be that the materials such as ITO, IZO, AZO make the conductive metal oxide film to be formed, transparent state.
In the present embodiment, encapsulation cover plate 200 can use cover-plate glass.Encapsulation cover plate 200 is provided with isolation buffer
Functional layer.Isolation buffer functional layer includes isolation projection 210, auxiliary electrode layer 220 and flexible conductive layer 230.
Isolation projection 210 is located on a side surface of encapsulation cover plate 200.Multiple isolation projections 210 define with the first pixel
The pixel defining layer 122 of layer 121 and second, which is engaged, further separates adjacent pixel cell and adjacent sub-pixel unit, from
And can effectively separate the luminous interference in top emitting display device 20 between adjacent same color sub-pixel, improve the aobvious of display
Show effect.It is appreciated that different zones isolation projection 210 height and corresponding region pixel defining layer height one by one
Corresponding, the thickness only with the isolation projection 210 corresponding to the first pixel defining layer 121 is more than corresponding second pixel defining layer
The thickness of 122 isolation projection 210, its thickness difference are equal to the thickness of the second pixel defining layer 122.Preferably, isolation projection 210
Gradually narrowed from the bottom that encapsulation cover plate 200 is in contact to top.The thickness range of isolation projection 210 can be 2-10 μm.
In addition, the material of isolation projection 210 be organic polymer, as but be not limited to PI, PEI, PEN, PMMA, FEP, EVA, EMA, PVB
And the material such as PSI.
In the present embodiment, it is preferable that auxiliary electrode layer 220 is in isolation projection 210, and it is raised to be located at isolation
The auxiliary electrode layer 220 of 210 ends is connected with the second electrode lay 140 on corresponding pixel defining layer.Auxiliary electrode layer
On the surface of 220 covering isolation projections 210.Auxiliary electrode layer 220 is opaque metal film layer, and its material can be but unlimited
In Al, Ag or their alloy, or the lamination of the material such as Al and Mo, Nb, Ti.The setting energy of the auxiliary electrode layer 220
It is enough to be engaged the hair further effectively separated in top emitting display device 20 between adjacent same color sub-pixel with isolating projection 210
Light disturbs, and improves the display effect of display.Meanwhile the setting of the auxiliary electrode layer 220 can make current flow through second electrode
Pressure drop reduces caused by layer 140, for the display of large area, it is possible to increase the display brightness of display device is uniform
Property.In other embodiments, when the sheet resistance in the second electrode lay 140 is little, electric current flows through the pressure that the second electrode lay 140 makes
Drop less and display device display effect it is good when, auxiliary electrode layer 220 need not can be set.
In the present embodiment, flexible conductive layer 230 is organic conductive layers, such as but is not limited to graphene, conductive carbon nanotube
The electroconductive organic films such as pipe, PEDOT.Flexible conductive layer 230 is located between auxiliary electrode layer 220 and the second electrode lay 140, is made auxiliary
Electrode layer 220 is helped to be connected with the second electrode lay 140.Flexible conductive layer 230 is used as cushion, in encapsulation cover plate 200 with lighting
Functional layer 130 encapsulation fitting when plays buffering, stress release effect, so as to reduce be bonded during to the second electrode lay 140
Damage.It is appreciated that flexible conductive layer 230 belongs to further preferred situation, in other embodiments, it is convenient to omit.
In the present embodiment, packaging adhesive frame 300 is located at substrate and encapsulation cover plate located at packaging adhesive frame, and is located at edge part
Position, for connecting substrate 100 and encapsulation cover plate 200, seals whole device.Wherein, the thin-film encapsulation layer in packaging adhesive frame 300 can
Think the overlapping layers of the plural layers such as inorganic compound thin film or inorganic/organic/inorganic, whole device is packaged, completely cut off
Water oxygen, improve long term device stability.
The Making programme of the top emitting display device 20 of present embodiment comprises the following steps：
S1, substrate 100 is provided, there is driving tft array on substrate.
S2, make first electrode layer 110, the first pixel defining layer 121, the second pixel defining layer on driving tft array
122nd, light emitting functional layer 130 and the second electrode lay 140.
S3, provide encapsulation cover plate glass 200, on encapsulation cover plate glass 200 by gold-tinted technique fabricating patterned every
From projection 210.
S4, pass through the auxiliary electrode layer 220 of gold-tinted technique fabricating patterned in isolation projection 210.
S5, flexible conductive layer 230 is made by transfer or imprint process on auxiliary electrode layer 220.
S6, encapsulation cover plate 200 is aligned with substrate 100 be bonded, and sealed by packaging adhesive frame 300.
S7, cure package glue frame 300, are produced.
The top emitting display device 20 of present embodiment, set on encapsulation cover plate 200 comprising isolation projection 210, auxiliary
It is auxiliary in the isolation buffer functional layer of electrode layer 220 and flexible conductive layer 230, isolation projection 210 and covering isolation projection 210
Electrode layer 220 is helped effectively to separate the interference that lighted in top emitting display device between the sub-pixel of adjacent same color, and flexibility is led
Electric layer 230 can be reduced when encapsulation cover plate 200 is bonded with display base plate 100 to the damage of the second electrode lay 140 with stress-buffer layer
Wound, the electric conductivity that auxiliary electrode layer 220 is connected raising transparent top electrode by flexible conductive layer 230 with the second electrode lay 140 are entered
And improve the display effect of whole top emitting typographical display device.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply 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, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of top emitting display device, it is characterised in that including substrate, first electrode layer, light emitting functional layer, the first pixel circle
Given layer, the second pixel defining layer, the second electrode lay, isolation buffer functional layer and encapsulation cover plate；
The first electrode layer, the light emitting functional layer, first pixel defining layer, second pixel defining layer and described
The second electrode lay forms multiple pixel cells on the substrate, and includes multiple sub-pixel lists in each pixel cell
Member, between the adjacent pixel cell or between the adjacent sub-pixel unit by first pixel defining layer every
Open, and also defined between the adjacent pixel cell by second pixel on first pixel defining layer
Layer separates；
The isolation buffer functional layer is located on the encapsulation cover plate and set towards the pixel cell, the isolation buffer layer
It is raised with multiple isolation, the isolation is raised be engaged with first pixel defining layer and second pixel defining layer into
One step separates the adjacent pixel cell and the adjacent sub-pixel unit.
2. top emitting display device according to claim 1, it is characterised in that also including auxiliary electrode layer, the auxiliary
Electrode layer is in the isolation projection, and the auxiliary electrode layer positioned at the raised end of isolation and the corresponding picture
The second electrode lay that element defines on layer is connected.
3. top emitting display device according to claim 2, it is characterised in that also including flexible conductive layer, the flexibility
Conductive layer is located between the auxiliary electrode layer and the second electrode lay.
4. top emitting display device according to claim 3, it is characterised in that the flexible conductive layer is that organic conductive is thin
Film layer.
5. top emitting display device according to any one of claim 1 to 4, it is characterised in that have on the substrate
Tft array is driven, the first electrode layer is connected with the driving tft array.
6. top emitting display device according to any one of claim 1 to 4, it is characterised in that the light emitting functional layer
Sent out for organic electroluminescent functional layer, quantum dot light emitting functional layer or the organic electroluminescent functional layer and the quantum dot
Light functional layer is combined the mixed luminescence functional layer to be formed.
7. top emitting display device according to any one of claim 1 to 4, it is characterised in that each pixel list
Light emitting functional layer in member be integrally covered in first pixel defining layer in the first electrode layer and the pixel cell it
On；The second electrode lay is integrally covered on the light emitting functional layer and second pixel defining layer.
8. the top emitting display device according to any one of claim 2 to 4, it is characterised in that the auxiliary electrode layer
For opaque metal film layer.
9. top emitting display device according to any one of claim 1 to 4, it is characterised in that the second electrode lay
For translucent conductive metal film layer or transparent conductive metal oxide film layer.
10. top emitting display device according to any one of claim 1 to 4, it is characterised in that also including packaging plastic
Frame, the packaging adhesive frame is located between the substrate and the encapsulation cover plate, for sealing whole device.
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| CN201720870311.2U CN207199626U (en) | 2017-07-17 | 2017-07-17 | Top emitting display device |
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| CN201720870311.2U CN207199626U (en) | 2017-07-17 | 2017-07-17 | Top emitting display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511507A (en) * | 2018-06-07 | 2018-09-07 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| CN109935618A (en) * | 2019-03-06 | 2019-06-25 | 深圳市华星光电半导体显示技术有限公司 | A kind of OLED display panel and preparation method thereof |
| WO2019218635A1 (en) * | 2018-05-14 | 2019-11-21 | 云谷（固安）科技有限公司 | Display panel and manufacturing method therefor |
| WO2021238482A1 (en) * | 2020-05-28 | 2021-12-02 | 京东方科技集团股份有限公司 | Display substrate and method for manufacturing same, and display apparatus |
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2017
- 2017-07-17 CN CN201720870311.2U patent/CN207199626U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019218635A1 (en) * | 2018-05-14 | 2019-11-21 | 云谷（固安）科技有限公司 | Display panel and manufacturing method therefor |
| US11289675B2 (en) | 2018-05-14 | 2022-03-29 | Yungu (Gu'an) Technology Co., Ltd. | Display panel with support structure and method of manufacturing the same |
| CN108511507A (en) * | 2018-06-07 | 2018-09-07 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| WO2019233479A1 (en) * | 2018-06-07 | 2019-12-12 | 京东方科技集团股份有限公司 | Display panel and display device |
| US11239442B2 (en) | 2018-06-07 | 2022-02-01 | Hefei Xinsheng Optoelectronics Technology Co., Ltd. | Display panel and display device |
| CN109935618A (en) * | 2019-03-06 | 2019-06-25 | 深圳市华星光电半导体显示技术有限公司 | A kind of OLED display panel and preparation method thereof |
| WO2021238482A1 (en) * | 2020-05-28 | 2021-12-02 | 京东方科技集团股份有限公司 | Display substrate and method for manufacturing same, and display apparatus |
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