CN110164929B - Organic light emitting display device - Google Patents
Organic light emitting display device Download PDFInfo
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- CN110164929B CN110164929B CN201910416252.5A CN201910416252A CN110164929B CN 110164929 B CN110164929 B CN 110164929B CN 201910416252 A CN201910416252 A CN 201910416252A CN 110164929 B CN110164929 B CN 110164929B
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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]
- H10K50/17—Carrier injection layers
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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
- H10K59/131—Interconnections, e.g. wiring lines or terminals
- H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance
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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]
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Abstract
The present invention provides an organic light emitting display device, comprising: a substrate; the functional layers are formed on the substrate and comprise display areas and spacing areas, the spacing areas are positioned between the adjacent display areas to space the display areas, the display areas comprise at least one light-emitting unit, and the light-emitting unit comprises a driving device which is connected with the light-emitting unit and provides a light-emitting driving signal for the light-emitting unit; the spacer region includes a compensation display region provided with a compensation light emitting unit. The compensation light-emitting unit is arranged in the non-light-emitting interval area, so that the interval area can emit light, the light-emitting area of the display device is increased, the defect that the light-emitting area is limited in the prior art is overcome, and full-color display is further realized.
Description
Technical Field
The invention relates to the technical field of displays, in particular to an organic light-emitting display device.
Background
In order to realize full color of OLED display, a tandem structure in which a White Organic Light Emitting Diode (WOLED) and a color filter layer are stacked may be used. The conventional OLED display device comprises a pixel light emitting area and a pixel spacing area, wherein the pixel spacing area belongs to a non-light emitting area, the light emitting area of the display device is only formed by the pixel light emitting area, and the increase of the area of the pixel light emitting area is limited due to the existence of the pixel spacing area, so that the whole light emitting area of the conventional display device is limited.
Disclosure of Invention
Accordingly, an object of the present invention is to overcome the limitation of the light emitting area in the related art, and to provide an organic light emitting display device.
Therefore, the technical scheme of the invention is as follows:
an organic light emitting display device, comprising:
a substrate;
the functional layers are formed on the substrate and comprise display areas and spacing areas, the spacing areas are positioned between the adjacent display areas to space the display areas, the display areas comprise at least one light-emitting unit, and the light-emitting unit comprises a driving device which is connected with the light-emitting unit and provides a light-emitting driving signal for the light-emitting unit;
the spacer region includes a compensation display region provided with a compensation light emitting unit.
Further, the light emitting unit comprises a display device and a color conversion layer arranged on the display device, the display device comprises at least two light emitting layer groups which are arranged in a stacked mode and a charge generation layer arranged between the adjacent light emitting layer groups, and the color conversion layer comprises a quantum dot conversion layer and/or a filter layer.
Further, the display device is a WOLED display device, and the color conversion layer is a filter layer.
Further, the light emitting layer group, the color conversion layer and the charge generation layer all extend from a display area to a spacer area, and the light emitting layer group, the color conversion layer and the charge generation layer together form the compensation light emitting unit at the portion of the spacer area, preferably, the light emitting layer group, the color conversion layer and the charge generation layer all cover the spacer area.
Further, the charge generation layer is a flat layer.
Furthermore, the light-emitting unit also comprises an anode layer, a hole injection layer and a cathode layer which are stacked, wherein the hole injection layer is directly contacted with the anode layer, and the plurality of light-emitting layers are assembled between the hole injection layer and the cathode layer.
Further, the hole injection layer covers or extends to the spacer.
Further, the hole injection layer is a flat layer.
Furthermore, the filter layer is an optical filter and comprises a plurality of color filter units, the color filter units comprise three types of red, green and blue, and the edge colors of the adjacent filter units with different colors are overlapped.
Furthermore, the filter layer is an optical filter and comprises a plurality of color filter units, the color filter units comprise three types of red, green and blue, and metal wires are arranged between the edges of the adjacent filter units with different colors.
The technical scheme of the invention has the following advantages:
1. the present invention provides an organic light emitting display device, comprising: a substrate; the functional layers comprise display areas and spacing areas, the spacing areas comprise compensation display areas, and compensation light-emitting units are arranged in the compensation display areas. The compensation light-emitting unit is arranged in the non-light-emitting interval area to increase the light-emitting area of the display device, and full-color display is further realized.
2. According to the organic light-emitting display device provided by the invention, the charge generation layer covers or extends to the spacing region, so that the spacing region can emit light, and meanwhile, the color conversion layer extends to the spacing region to cover the compensation display region of the spacing region, so that the color light emission of the spacing region is realized.
3. In the organic light emitting display device provided by the invention, the charge generation layer is a flat layer; by providing the charge generation layer as a flat layer, horizontal transfer of charges is facilitated, and blocking of transfer of charges in the charge generation layer due to the presence of steps or the like is avoided.
4. The organic light-emitting display device provided by the invention is characterized in that the hole injection layer covers or extends to the spacing region, and the hole injection layer is a flat layer; by providing the hole injection layer as a flat layer covering or extending to the spacer, horizontal migration of charges within the hole injection layer to the spacer is allowed while preventing blocking of migration of charges within the hole injection layer due to the presence of a step or the like.
5. According to the organic light-emitting display device provided by the invention, the phenomenon of light crosstalk between adjacent pixels can be avoided by means of overlapping the colors of the edges of the adjacent filtering units with different colors or arranging the metal wires between the edges of the filtering units with different colors.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an organic light emitting display device according to the present invention;
FIG. 2 is a schematic diagram of a partial structure of the optical filter of the present invention;
fig. 3 is another partial structural diagram of the optical filter of the present invention.
Description of reference numerals:
1-a substrate; 2-pixel light emitting area; 3-a pixel spacer region;
4-an optical filter; 41-a red filter unit; 42-green filter unit; 43-blue filter unit; 44-metal lines;
5-a display device; 51-an anode layer; 52-hole injection layer; 53-first luminescent layer group; 531 — first hole transport layer; 532-a first light emitting layer; 533-first electron transport layer; 54-a second luminescent layer group; 541-a second hole transport layer; 542-a second light emitting layer; 543-a second electron transport layer; 55-a charge generation layer; 56-cathode layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1, an organic light emitting display device includes a substrate 1 and a plurality of functional layers, wherein the plurality of functional layers are formed on the substrate 1, each functional layer includes a plurality of display regions and a spacer region, the spacer region is located between adjacent display regions to space the display regions, the display regions are pixel light emitting regions 2 shown in fig. 1, and the spacer region is a pixel spacer region 3 shown in fig. 1. The pixel light emitting area 2 comprises at least one light emitting cell comprising a driving device connected thereto and providing a light emitting driving signal thereto, in particular the light emitting cell may be a sub-pixel cell. Wherein the pixel spacing area 3 includes a compensation display area provided with a compensation light emitting unit; the pixel space region may be partially set as the compensation display region, or may be entirely set as the compensation display region. The compensation light-emitting unit is arranged in the non-light-emitting pixel interval area to supplement and display the display device, so that the interval area can emit light, the whole light-emitting area of the display device is increased, the defect that the light-emitting area is limited in the prior art is overcome, and full-color display is further realized.
Wherein the light emitting unit comprises a display device 5 and a color conversion layer provided thereon, the display device 5 comprising at least two groups of light emitting layers (53, 54) and a charge generation layer 55 provided between adjacent groups of light emitting layers, the color conversion layer comprising a quantum dot conversion layer and/or a filter layer. It should be noted that when the quantum dot conversion layer is used, the display device 5 in this case is a monochrome display device, such as red, green or blue, and the color can be changed according to actual needs by the arrangement of the quantum dot conversion layer.
The display device 5 in this embodiment is a WOLED display device, and a white light device is used, which is highly controllable and facilitates actual production operation.
In this embodiment, the light emitting layer group, the color conversion layer, and the charge generation layer all extend from the display region to the spacer region, and the portions of the light emitting layer group, the color conversion layer, and the charge generation layer located in the spacer region together form the compensation light emitting unit. Preferably, the light emitting layer group, the color conversion layer and the charge generation layer all cover the spacer region, and this embodiment can more greatly play a role of the charge generation layer, so that the spacer region has more excellent light emitting effect.
Optionally, the color conversion layer is a filter layer, and some specific wavelengths are absorbed by the filter layer, so that part of the wavelengths are allowed to pass through, and different colors can be presented.
Optionally, the filter layer is an optical filter 4, which includes a plurality of color filter units, specifically referring to fig. 2 to 3, and is a partial structural schematic diagram of the optical filter of the present invention, where the color filter units include three types, namely a red filter unit 41, a green filter unit 42, and a blue filter unit 43, and the red sub-pixel, the green sub-pixel, and the blue sub-pixel are respectively formed by the cooperation of the above filter units and white light emitted by the WOLED display device. Further, in the embodiment shown in fig. 2, the colors of the edges of adjacent filter units of different colors overlap, specifically, a part of the area between the visible red filter unit 41 and the visible green filter unit 42 overlaps, a part of the area between the visible green filter unit 42 and the visible blue filter unit 43 overlaps, or a part of the area between the visible red filter unit 41 and the visible blue filter unit 43 overlaps, and may be set according to actual situations. Thereby avoiding optical crosstalk between adjacent pixels. Of course, as an alternative embodiment, as shown in fig. 3, a metal wire 44 is attached between the edges of the adjacent filter units of different colors, specifically, there is a metal wire between the red filter unit 41 and the green filter unit 42, there is a metal wire between the green filter unit 42 and the blue filter unit 43, or there is a metal wire between the red filter unit 41 and the blue filter unit 43, which may be set according to the actual situation. This also avoids optical crosstalk between adjacent pixels.
Referring to fig. 1, the display device 5 includes an anode layer 51, a hole injection layer 52 disposed on the anode layer 51, at least two light-emitting layer groups disposed on the hole injection layer, and a cathode layer 56 disposed on the top light-emitting layer group. The charge generation layers 55 are disposed between adjacent light emitting layer groups, and if N +1 light emitting layer groups are disposed, and the charge generation layers 55 are disposed between any two adjacent light emitting layer groups, N charge generation layers 55 are disposed in total.
Optionally, each light emitting layer group is correspondingly provided with a hole transport layer and an electron transport layer, and if an N +1 light emitting layer group is provided, an N +1 hole transport layer and an electron transport layer are correspondingly provided (where N is an integer, and a value range of N is greater than or equal to 1).
The display device 5 in the present embodiment includes two light emitting layer groups each including a hole transport layer, a light emitting layer, and an electron transport layer. As shown in fig. 1, an anode layer 51 covering all the light emitting regions of the pixels, a hole injection layer 52 in contact with the anode layer 51, a first hole transport layer 531, a first light emitting layer 532, a first electron transport layer 533, a charge generation layer 55, a second hole transport layer 541, a second light emitting layer 542, a second electron transport layer 543, and a cathode layer 56 are stacked in this order on a substrate 1, and finally a filter layer is provided on the cathode layer 56.
It is understood that the display device 5 in the present embodiment may further include a hole blocking layer and an electron blocking layer (not shown in the figure) in addition to the above functional layers, and the arrangement is performed according to actual situations, and is not limited specifically herein.
The charge generation layer 55 in this embodiment is a full-surface structure, which covers all the pixel light emitting regions 2 and the pixel spacers 3, and the charge generation layer 55 is a flat layer without a step structure; by providing the charge generation layer 55 in a full-surface structure while covering the pixel light-emitting region 2 and the pixel spacing region 3, conditions are provided for lateral migration of charges in the charge generation layer 55, and providing the charge generation layer 55 as a flat layer having no stepped structure facilitates lateral migration of charges, thereby preventing blocking of migration of charges in the charge generation layer due to the presence of steps and the like. Therefore, after an external driving voltage is input, charges in the charge generation layer 55 can laterally migrate from the pixel light emitting area 2 to the pixel space area 3 nearby the charge generation layer, so that the conduction of the vertical light emitting layer in the pixel space area 3 nearby the pixel light emitting area 2 can be realized, and finally, the local WOLED display device in the pixel space area 3 can emit white light, and on the basis, the local WOLED display device can realize color display by being matched with the optical filter 4 which is positioned at the top layer of the display device and corresponds to the pixel space area 3. Wherein the color of the filter 4 corresponding to the pixel spacing area 3 may be set to be the same as or different from the color of the filter 4 of the pixel light emitting area 2 adjacent thereto.
In this embodiment, a buffer layer (not shown) may be optionally added to the charge generation layer 55, so as to effectively suppress the lateral conductivity of the charge generation layer. By arranging the buffer layer, the charge can be ensured to be transferred to the adjacent pixel interval area, and the adjacent pixel area can be prevented from emitting light (namely, the light leakage problem can be avoided). The buffer layer may be football ene (C)60) Material, football ene (C)60) The molecular stability and the performance are excellent, the price is low, the availability is easy, and the buffer effect is good.
The first light emitting layer group 53, the second light emitting layer group 54, the filter layer, and the charge generation layer 55 in this embodiment all cover or extend to the pixel spacing area 3, and cooperate with the filter 4 correspondingly disposed on the top of the pixel spacing area 3, so that the compensation light emitting unit is configured in the pixel spacing area 3, so that color light emission is realized in a partial area or a whole area of the pixel spacing area 3.
As an alternative embodiment, the charge generation layer and the hole injection layer each cover or extend to the spacer region, and lateral charge transfer is generated in the charge generation layer and the hole injection layer by inputting a driving voltage, thereby achieving light emission of the light emitting layer corresponding to the transfer region. Further, both the charge generation layer and the hole injection layer cover the spacer region to achieve more excellent effects. Similarly, to facilitate lateral migration of charges within the hole injection layer, the hole injection layer is a full-face structure and is a flat layer without a step structure. By providing the hole injection layer as a flat layer covering or extending to the spacer, horizontal migration of charges within the hole injection layer to the spacer is allowed while preventing blocking of migration of charges within the hole injection layer due to the presence of a step or the like.
The compensation light-emitting unit is arranged in the interval area, the charge generation layer is combined on the basis, and the pixel interval area can emit light by adjusting the charge generation layer and other functional layers, so that the light-emitting area of the display device is increased, the defect that the light-emitting area is limited in the prior art is overcome, and full-color display is further realized.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. An organic light emitting display device, comprising:
a substrate;
the functional layers are formed on the substrate and comprise display areas and spacing areas, the spacing areas are positioned between the adjacent display areas to space the display areas, the display areas comprise at least one light-emitting unit, and the light-emitting unit comprises a driving device which is connected with the light-emitting unit and provides a light-emitting driving signal for the light-emitting unit;
the spacer area comprises a compensation display area, and the compensation display area is partially provided with a compensation light-emitting unit;
the light emitting unit further includes a charge generation layer extending from the display region to the spacer region, and carriers in the charge generation layer laterally migrate into the compensation light emitting unit to cause the compensation light emitting unit to emit light.
2. The organic light-emitting display device according to claim 1, wherein the light-emitting unit comprises a display device and a color conversion layer provided thereon, the display device comprising at least two light-emitting layer groups arranged in a stack and a charge generation layer provided between adjacent light-emitting layer groups; the color conversion layer includes a quantum dot conversion layer and/or a filter layer.
3. The organic light emitting display apparatus of claim 2, wherein the display device is a WOLED display device and the color conversion layer is a filter layer.
4. The organic light-emitting display device according to claim 2, wherein the group of light-emitting layers and the color conversion layer each extend from a display region to a spacer region, and the group of light-emitting layers, the color conversion layer, and a portion of the charge generation layer located in the spacer region together constitute the compensation light-emitting unit.
5. The organic light-emitting display device according to claim 4, wherein the light-emitting layer group, the color conversion layer, and the charge generation layer each cover the spacer region.
6. The organic light-emitting display device according to claim 4 or 5, wherein the charge generation layer is a flat layer.
7. The organic light-emitting display device according to any one of claims 3 to 5, wherein the light-emitting unit further comprises an anode layer, a hole injection layer, and a cathode layer, which are stacked, the hole injection layer being in direct contact with the anode layer, and a plurality of the light-emitting layers being arranged between the hole injection layer and the cathode layer.
8. The organic light-emitting display device according to claim 7, wherein the hole injection layer covers or extends to the spacer region.
9. The organic light-emitting display device according to claim 7, wherein the hole injection layer is a flat layer.
10. The organic light emitting display device of claim 3, wherein the filter layer is a filter comprising a plurality of color filter units, the color filter units comprise three color filter units of red, green and blue, and the colors of the adjacent color filter units overlap.
11. The OLED device as claimed in claim 3, wherein the filter layer is a color filter comprising a plurality of color filter units, the color filter units comprise red, green and blue, and metal lines are disposed between edges of adjacent color filter units.
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| CN201910416252.5A CN110164929B (en) | 2019-05-17 | 2019-05-17 | Organic light emitting display device |
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| CN201910416252.5A CN110164929B (en) | 2019-05-17 | 2019-05-17 | Organic light emitting display device |
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| CN110164929B true CN110164929B (en) | 2021-06-11 |
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| CN1426269A (en) * | 2001-12-06 | 2003-06-25 | 索尼公司 | Display device and its producing method |
| CN1529537A (en) * | 2003-10-20 | 2004-09-15 | 友达光电股份有限公司 | Full-color organic electroluminescent display and manufacturing method thereof |
| CN104393013A (en) * | 2014-10-20 | 2015-03-04 | 深圳市华星光电技术有限公司 | Color display device |
| KR20160000811A (en) * | 2014-06-24 | 2016-01-05 | 엘지디스플레이 주식회사 | Organic Light Emitting Device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012155953A (en) * | 2011-01-25 | 2012-08-16 | Sony Corp | Organic el display device and electronic apparatus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426269A (en) * | 2001-12-06 | 2003-06-25 | 索尼公司 | Display device and its producing method |
| CN1529537A (en) * | 2003-10-20 | 2004-09-15 | 友达光电股份有限公司 | Full-color organic electroluminescent display and manufacturing method thereof |
| KR20160000811A (en) * | 2014-06-24 | 2016-01-05 | 엘지디스플레이 주식회사 | Organic Light Emitting Device |
| CN104393013A (en) * | 2014-10-20 | 2015-03-04 | 深圳市华星光电技术有限公司 | Color display device |
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