CN114141831A - Laminated light emitting device and display apparatus - Google Patents
Laminated light emitting device and display apparatus Download PDFInfo
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- CN114141831A CN114141831A CN202111391385.5A CN202111391385A CN114141831A CN 114141831 A CN114141831 A CN 114141831A CN 202111391385 A CN202111391385 A CN 202111391385A CN 114141831 A CN114141831 A CN 114141831A
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- 239000012530 fluid Substances 0.000 claims abstract description 76
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 230000005684 electric field Effects 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 4
- 238000009736 wetting Methods 0.000 claims 3
- 239000012266 salt solution Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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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
- H10K59/17—Passive-matrix OLED displays
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- Electroluminescent Light Sources (AREA)
Abstract
本发明公开了一种叠层发光器件和显示装置，叠层发光器件包括衬底、发光控制器件层和发光器件层，发光控制器件层包括多个电润湿单元，每个电润湿单元与发光器件层的至少部分区域对应，电润湿单元包括自衬底一侧层叠设置的第一电极、介电层、流体层和第二电极；发光器件层包括位于发光控制器件层远离衬底一侧的层叠设置的且分别整面连通的第三电极层、发光层和第四电极层。本发明实施例，通过电润湿单元中的第一流体在电场的作用下发生形变，以使对应位置处的光线透过，进而实现对叠层发光器件的不同发光位置的控制。第三电极层和第四电极层均为整层连通的，可以降低驱动发光器件层发光的电流，实现叠层发光器件大尺寸、高分辨率显示的应用。
The invention discloses a laminated light-emitting device and a display device. The laminated light-emitting device includes a substrate, a light-emitting control device layer and a light-emitting device layer. The light-emitting control device layer includes a plurality of electrowetting units, and each electrowetting unit is connected to Corresponding to at least part of the area of the light-emitting device layer, the electrowetting unit includes a first electrode, a dielectric layer, a fluid layer and a second electrode that are stacked from one side of the substrate; The third electrode layer, the light-emitting layer and the fourth electrode layer are stacked on the side and communicated over the entire surface respectively. In the embodiment of the present invention, the first fluid in the electrowetting unit is deformed under the action of the electric field, so that the light at the corresponding position is transmitted, thereby realizing the control of different light-emitting positions of the stacked light-emitting device. Both the third electrode layer and the fourth electrode layer are connected in the whole layer, which can reduce the current for driving the light-emitting device layer to emit light, and realize the application of large-size and high-resolution display of the stacked light-emitting device.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a laminated light-emitting device and a display device.
Background
In a Passive Matrix Organic Light Emitting Display (PMOLED), each pixel is controlled by a complex electrode network, so as to charge and discharge a certain pixel, and the PMOLED occupies an important position in the initial development stage of the OLED by virtue of simple process and simple structure.
However, PMOLEDs are limited to a driving method (line scan), and the resolution thereof cannot be improved, and products are limited to a low-resolution and small-size market, and development of larger-size and high-resolution display applications may result in problems of increased power consumption and reduced lifetime.
Disclosure of Invention
The invention provides a laminated light-emitting device and a display device, which can reduce the current of a light-emitting device layer in the laminated light-emitting device, prolong the service life of the device and realize the application of large-size and high-resolution display of the laminated light-emitting device.
In a first aspect, an embodiment of the present invention provides a stacked light emitting device, including a substrate, a light emitting control device layer and a light emitting device layer, where the light emitting control device layer is located on one side of the substrate, and the light emitting device layer is located on a side of the light emitting control device layer away from the substrate;
the light-emitting control device layer comprises a plurality of electrowetting cells, each electrowetting cell corresponds to at least a partial area of the light-emitting device layer in the thickness direction of the laminated light-emitting device, the electrowetting cells comprise a first electrode, a dielectric layer, a fluid layer and a second electrode which are arranged in a laminated mode from one side of the substrate, the fluid layer comprises a first non-conductive fluid and a second conductive fluid, the first fluid and the second fluid are immiscible, and the first fluid is used for deforming under the action of an electric field to enable light of the light-emitting device layer to penetrate through;
the light-emitting device layer comprises a third electrode layer, a light-emitting layer and a fourth electrode layer which are positioned on one side, far away from the substrate, of the light-emitting control device layer, and the third electrode layer, the light-emitting layer and the fourth electrode layer are respectively communicated in the whole surface.
Optionally, the electrowetting cells are arranged in an array, and the first electrodes of the electrowetting cells in a row are communicated and the second electrodes of the electrowetting cells in a column are communicated.
Optionally, the electrowetting cells are arranged in an array, and the first electrodes of the electrowetting cells in a column are communicated and the second electrodes of the electrowetting cells in a row are communicated.
Optionally, the plurality of electrowetting cells are arranged in an array, the first electrodes of the electrowetting cells are insulated from each other, and the second electrodes of the electrowetting cells are communicated.
Optionally, the light emitting control device layer further includes a retaining wall, where the retaining wall is located between adjacent fluid layers of the electrowetting cells and used for separating the adjacent fluid layers of the electrowetting cells.
Optionally, the first fluid is opaque to light.
Optionally, the first fluid is an ink or an alkane.
Optionally, the second fluid is transparent to light, and the second fluid of at least one of the electrowetting cells is one of a red liquid, a green liquid or a blue liquid.
Optionally, the second fluid is water or a saline solution.
In a second aspect, embodiments of the present invention further provide a display apparatus, which includes the laminated light emitting device according to any one of the first aspect.
The embodiment of the invention provides a laminated light-emitting device and a display device, wherein the laminated light-emitting device comprises a substrate, a light-emitting control device layer and a light-emitting device layer which are sequentially arranged in a laminated manner, the light-emitting control device layer comprises a plurality of electrowetting units, each electrowetting unit corresponds to at least part of the area of the light-emitting device layer, each electrowetting unit comprises a first electrode, a dielectric layer, a fluid layer and a second electrode which are arranged in a laminated manner from one side of the substrate, and the fluid layer comprises a non-conductive first fluid and a conductive second fluid; the light-emitting device layer comprises a third electrode layer, a light-emitting layer and a fourth electrode layer which are positioned on one side, far away from the substrate, of the light-emitting control device layer, and the third electrode layer, the light-emitting layer and the fourth electrode layer are respectively communicated in the whole surface. The laminated light-emitting device comprises a plurality of sub-laminated light-emitting devices, a part of each electrowetting unit corresponding to at least part of the area of the light-emitting device layer can form one sub-laminated light-emitting device, and the light of at least one corresponding sub-laminated light-emitting device can penetrate through the deformation of the first fluid in the electrowetting unit under the action of an electric field, so that the independent control of each sub-laminated light-emitting device is realized, and the control of different light-emitting positions of the laminated light-emitting device is further realized. The current for driving the light emitting device layer to emit light in the laminated light emitting device is in direct proportion to the number of rows of electrodes in the third electrode layer or the fourth electrode layer, and the third electrode layer and the fourth electrode layer are communicated in a whole layer, so that the current for driving the light emitting device layer to emit light is reduced, and the application of large-size and high-resolution display of the laminated light emitting device is realized. And the influence of large current on the performance of the device is reduced, and the service life of the laminated light-emitting device is prolonged.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a stacked light-emitting device according to an embodiment of the present invention;
fig. 2 is a top view of a stacked light emitting device according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of another stacked light-emitting device provided by the embodiment of the invention;
fig. 4 is a top view of another stacked light emitting device provided by an embodiment of the present invention;
fig. 5 is a top view of another stacked light emitting device provided by an embodiment of the present invention;
fig. 6 is a schematic cross-sectional structure diagram of another stacked light-emitting device provided by the embodiment of the invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic cross-sectional structure diagram of a stacked light emitting device according to an embodiment of the present invention, and referring to fig. 1, the stacked light emitting device includes a substrate 100, a light emitting control device layer 200, and a light emitting device layer 300, the light emitting control device layer 200 is located on one side of the substrate 100, and the light emitting device layer 300 is located on one side of the light emitting control device layer 200 away from the substrate 100;
the light emitting control device layer 200 comprises a plurality of electrowetting cells 210, each electrowetting cell 210 corresponds to at least a partial area of the light emitting device layer 300 in a thickness direction of the stacked light emitting device, the electrowetting cell 210 comprises a first electrode 211, a dielectric layer 212, a fluid layer 213 and a second electrode 214 which are stacked from one side of the substrate 100, the fluid layer 213 comprises a first non-conductive fluid 2131 and a second conductive fluid 2132, the first fluid 2131 and the second fluid 2132 are immiscible, and the first fluid 2131 is configured to deform under the action of an electric field to transmit light rays of the light emitting device layer 300;
the light emitting device layer 300 includes a third electrode layer 311, a light emitting layer 312, and a fourth electrode layer 313 stacked on the light emitting control device layer 200 on the side away from the substrate 100, and the third electrode layer 311, the light emitting layer 312, and the fourth electrode layer 313 are in full-surface communication, respectively.
Optionally, first fluid 2131 is opaque to light.
The substrate 100 may be a hard base formed of at least one of polymer materials such as glass, glass fiber reinforced plastic, etc., or a flexible base formed of at least one of Polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), etc., and in this embodiment, the substrate 100 is a glass substrate. The dielectric layer 212 may be a hydrophobic material and have insulating properties, the second fluid 2132 may be an aqueous solution, and the first fluid 2131 is insoluble in water. The electrowetting cell 210 changes the wettability of the first fluid 2131 on the dielectric layer 212 by changing the wettability of the surface of the dielectric layer 212 by an electric field, making the surface of the dielectric layer 212 more hydrophilic. When the electrowetting cell 210 is not applied with an electric field, the first fluid 2131 is entirely laid on the dielectric layer 212, so that light of the light emitting device layer 300 cannot pass through the electrowetting cell 210. When an electric field is applied to the electrowetting cell 210, the first fluid 2131 deforms and displaces, so that the area of the first fluid 2131 on the dielectric layer 212 is one N, for example, N may be ten, of the area of the dielectric layer 212 when the first fluid 2131 is not contracted, and light emitted by the light emitting device layer 300 can pass through the electrowetting cell 210 after the first fluid 2131 is contracted. The stacked light emitting device may further include a cover plate (not shown) on a side of the light emitting device layer 300 away from the substrate 100, wherein the cover plate may be a glass cover plate for encapsulating the light emitting device layer 300, preventing water and oxygen from entering the light emitting device layer 300 and affecting the performance of the device, and simultaneously protecting the stacked light emitting device.
In the prior art, the third electrode layer 311 of the light emitting device layer 300 includes a plurality of mutually insulated third electrodes, and the fourth electrode layer 313 includes a plurality of mutually insulated fourth electrodes, and when the stacked light emitting device is driven to emit light, the larger the number of rows of the third electrodes or the fourth electrodes is, the larger the required driving current is. The third electrode layer 311, the light-emitting layer 312, and the fourth electrode layer 313 in this embodiment are connected over their entire surfaces, respectively, and the magnitude of the driving current for driving the light-emitting device layer 300 to emit light can be reduced.
The laminated light-emitting device comprises a plurality of sub-laminated light-emitting devices, and the part of each electrowetting unit corresponding to at least partial area of the light-emitting device layer can form one sub-laminated light-emitting device. When it is necessary to light the stacked light emitting device, a voltage is applied to the third electrode layer 311 and the fourth electrode layer 313 to cause the light emitting layer 312 of the light emitting device layer to emit light, and the third electrode layer 311, the light emitting layer 312, and the fourth electrode layer 313 are all in communication with each other, so that the light emitting device layer 300 is entirely lit. In actual operation, when only some sub-stack light emitting devices are required to emit light, a voltage is applied to the first electrode 211 and the second electrode 214 of the electrowetting unit 210 corresponding to the sub-stack light emitting device that needs to emit light, so that the first fluid 2131 contracts under the action of an electric field, and further the light emitted by the sub-stack light emitting device is emitted through the electrowetting unit 210, and no voltage is applied to the other electrowetting units 210 except the electrowetting unit 210 corresponding to the sub-stack light emitting device that needs to emit light, and the first fluid 2131 is laid on the surface of the dielectric layer 212, so that the light of the sub-stack light emitting device corresponding to the electrowetting unit 210 cannot be emitted through the electrowetting unit 210, and further, the control of different light emitting positions can be realized through the electrowetting unit 210.
In this embodiment, the stacked light emitting device may include a plurality of sub-stacked light emitting devices, a portion of each electrowetting cell corresponding to at least a partial region of the light emitting device layer may form a sub-stacked light emitting device, and the first fluid in the electrowetting cell deforms under the action of the electric field to allow light of at least one corresponding sub-stacked light emitting device to pass through, so as to implement independent control over each sub-stacked light emitting device, and further implement control over different light emitting positions of the stacked light emitting device. The current for driving the light emitting device layer to emit light in the laminated light emitting device is in direct proportion to the number of rows of electrodes in the third electrode layer or the fourth electrode layer, and the third electrode layer and the fourth electrode layer are communicated in a whole layer, so that the current for driving the light emitting device layer to emit light is reduced, and the application of large-size and high-resolution display of the laminated light emitting device is realized. And the influence of large current on the performance of the device is reduced, and the service life of the laminated light-emitting device is prolonged.
Fig. 2 is a top view of a stacked light emitting device according to an embodiment of the present invention, the cross-sectional structure shown in fig. 1 can be cut along AA' in fig. 2, and fig. 2 does not show a light emitting device layer and a dielectric layer and a fluid layer between a first electrode and a second electrode, and referring to fig. 1 and 2, a plurality of electrowetting cells 210 are arranged in an array, and first electrodes 211 of electrowetting cells 210 in a column are communicated and second electrodes 214 of electrowetting cells in a row are communicated.
The overlapped part of the first electrode 211 and the second electrode 214 forms an electrowetting cell 210, and the light-emitting control device layer 200 drives the first fluid layer 2131 to deform in a passive matrix driving manner, so that light of the sub-stacked light-emitting device is transmitted out through the electrowetting cell 210, and independent control of each sub-stacked light-emitting device is realized, and further control of different light-emitting positions of the stacked light-emitting device is realized. The first electrode 211 and the second electrode 214 of the light emitting control device layer 200 are strip electrodes, and have simple manufacturing process, simple structure and convenient application.
Fig. 3 is a schematic cross-sectional structure diagram of another stacked light emitting device according to an embodiment of the present invention, fig. 4 is a top view of another stacked light emitting device according to an embodiment of the present invention, the schematic cross-sectional structure diagram shown in fig. 3 can be obtained by cutting along BB' in fig. 4, and fig. 4 does not show a light emitting device layer and a dielectric layer and a fluid layer between a first electrode and a second electrode, referring to fig. 3 and 4, optionally, a plurality of electrowetting cells 210 are arranged in an array, and the first electrodes 211 of the electrowetting cells 210 in a row are communicated with each other and the second electrodes 214 of the electrowetting cells 210 in a column are communicated with each other.
The overlapped part of the first electrode 211 and the second electrode 214 forms an electrowetting cell 210, and the light-emitting control device layer 200 drives the first fluid layer 2131 to deform in a passive matrix driving manner, so that light of the sub-stacked light-emitting device is transmitted out through the electrowetting cell 210, and independent control of each sub-stacked light-emitting device is realized, and further control of different light-emitting positions of the stacked light-emitting device is realized. The first electrode 211 and the second electrode 214 of the light emitting control device layer 200 are strip electrodes, and have simple manufacturing process, simple structure and convenient application.
Fig. 5 is a top view of another stacked light emitting device provided by the embodiment of the present invention, and the schematic cross-sectional structure shown in fig. 1 can also be obtained by cutting along CC' in fig. 5, where fig. 5 only illustrates the substrate of the stacked light emitting device and the first electrode of the electrowetting cell, and the remaining film layers are not shown. Referring to fig. 1 and 5, alternatively, a plurality of electrowetting cells 210 are arranged in an array, the first electrodes 211 of the electrowetting cells 210 are insulated from each other, and the second electrodes 214 of the electrowetting cells 210 are connected.
In this embodiment, the first electrodes 211 are arranged in an array, and a position where each first electrode 211 overlaps with the second electrode 214 is an electrowetting cell 210. After applying a voltage to the second electrode 214 and a certain first electrode 211, the first fluid 2131 in the electrowetting cell 210 to which the first electrode 211 belongs may be shrunk, so that the light in the light emitting device layer 300 is emitted through the electrowetting cell 210.
Optionally, the first fluid is an ink or an alkane.
The ink or alkane is insoluble in water and is more common and therefore can serve as the first fluid.
Optionally, the second fluid is transparent to light, and the second fluid of the at least one electrowetting cell is one of a red liquid, a green liquid or a blue liquid.
Optionally, the second fluid is water or a saline solution.
Water or saline solution is common and transparent and can be used as the second fluid. The second fluid is transparent, so that light emitted from the light-emitting device layer can enter the first fluid through the second fluid. The third electrode layer, the light emitting layer and the fourth electrode layer of the light emitting device layer are communicated in the whole layer, so that light emitted by the light emitting device layer is monochromatic light, the second fluid of at least one electrowetting cell is one of red liquid, green liquid or blue liquid, and the laminated light emitting device can realize color display.
Fig. 6 is a schematic cross-sectional structure view of another stacked light emitting device according to an embodiment of the present invention, and referring to fig. 6, optionally, the light emitting control device layer 200 further includes a blocking wall 215, where the blocking wall 215 is located between the fluid layers 213 of the adjacent electrowetting cells 210, and is used for separating the fluid layers 213 of the adjacent electrowetting cells 210.
The dielectric layer 212 and the fluid layer 213 can be respectively laid in whole layers, thereby simplifying the manufacturing process of the laminated light emitting device. On this basis, the retaining walls 215 are disposed between the fluid layers 213, and the retaining walls 215 can prevent the first fluid 2131 in any electrowetting cell 210 from crossing the retaining walls 215 to flow into other electrowetting cells 210, and can also prevent the second fluid 2132 from flowing into other electrowetting cells 210, and when the second fluid 2132 is a colored liquid, the electrowetting cells 210 can be prevented from being colored.
Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device includes the display panel according to any one of the embodiments. The display device may be a mobile phone as shown in fig. 7, or may also be a computer, a television, an intelligent wearable display device, and the like, which is not particularly limited in this embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
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| CN202111391385.5A CN114141831A (en) | 2021-11-23 | 2021-11-23 | Laminated light emitting device and display apparatus |
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| JP2007179856A (en) * | 2005-12-27 | 2007-07-12 | Toppan Printing Co Ltd | Inorganic EL display and manufacturing method thereof |
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| CN107945750A (en) * | 2018-01-02 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of Electrowetting display panel and its driving method |
| CN111258054A (en) * | 2020-03-30 | 2020-06-09 | 深圳市华星光电半导体显示技术有限公司 | Quantum dot display device and manufacturing method thereof |
| US20210351381A1 (en) * | 2020-05-06 | 2021-11-11 | Hubei Yangtze Industrial Innovation Center of Advanced Display Co., Ltd. | Display panel, manufacturing method thereof and display apparatus |
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2021
- 2021-11-23 CN CN202111391385.5A patent/CN114141831A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007179856A (en) * | 2005-12-27 | 2007-07-12 | Toppan Printing Co Ltd | Inorganic EL display and manufacturing method thereof |
| CN106199948A (en) * | 2016-07-06 | 2016-12-07 | 京东方科技集团股份有限公司 | The moistening structure of a kind of electricity, display module and display device |
| CN107945750A (en) * | 2018-01-02 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of Electrowetting display panel and its driving method |
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