CN106960918B - Method for manufacturing organic light emitting display device - Google Patents
Method for manufacturing organic light emitting display device Download PDFInfo
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- CN106960918B CN106960918B CN201710021875.3A CN201710021875A CN106960918B CN 106960918 B CN106960918 B CN 106960918B CN 201710021875 A CN201710021875 A CN 201710021875A CN 106960918 B CN106960918 B CN 106960918B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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Abstract
The present invention relates to a method of manufacturing an organic light emitting display device, which may include the steps of: preparing a substrate; forming an organic light emitting element over a substrate; coating a filler on the organic light emitting element; injecting a gas into the fill material.
Description
Technical Field
The present disclosure relates to a method of manufacturing an organic light emitting display device.
Background
Conventionally, a Liquid Crystal Display (LCD), a Plasma Display (PDP), an Organic Light Emitting Display (OLED), a Field Emission Display (FED), an electrophoretic display (electrophoretic display), and the like are known as display devices.
In particular, an organic light emitting display device includes two electrodes and an organic light emitting layer between the two electrodes, and electrons (electrons) injected from one electrode and holes (holes) injected from the other electrode are combined in the organic light emitting layer to form excitons (exiton), and the excitons emit energy to emit light.
The organic light emitting display device has self-luminescence (self-luminescence) characteristics, and does not need to be equipped with a special light source unlike the liquid crystal display device, thereby being capable of reducing thickness and weight. In addition, organic light emitting display devices exhibit high quality characteristics such as low power consumption, high luminance, and fast response speed, and thus are attracting attention as next-generation display devices.
In such an organic light emitting display apparatus, a filling layer may be disposed between the organic light emitting element and the color filter layer. However, the scattering body included in the filling layer is not uniformly distributed in the filling layer, and thus light emitted from the organic light emitting element is not uniformly scattered, whereby spots or the like may be seen.
Disclosure of Invention
In view of the above-described technical background, the present invention is directed to a method of manufacturing an organic light emitting display device capable of preventing spots or the like from being generated due to uneven arrangement of scattering bodies in a filler layer.
A method of manufacturing an organic light emitting display device according to an embodiment of the present invention may include the steps of: preparing a substrate; forming an organic light emitting element on the substrate; coating a filler on the organic light emitting element; and injecting a gas into the fill material.
In the step of applying the filling material, the filling material may be applied in a linear form extending in a first direction on the substrate.
In the step of applying the filling material, the filling material may be simultaneously applied in a plurality of linear forms.
The plurality of straight lines may be parallel to each other.
The distance between adjacent pairs of the straight lines may be 40 to 60 μm.
The filling substance may be in a liquid state.
The filler may include a polymer resin and a scatterer.
The polymer resin may include at least one selected from the group consisting of polycarbonate, polyethylene, methacrylic resin polyethylene terephthalate, and polystyrene.
The scatterer may include at least one metal selected from the group consisting of gold, silver, aluminum, platinum, palladium, cadmium, cobalt, ruthenium, copper, indium, nickel, and iron.
In the injecting the gas, the gas may be injected toward the filling material in a direction perpendicular with respect to the substrate.
The gas may be nitrogen (N)2) Or cool Dry Air (Cooling Dry Air).
A step of curing the filling material may also be included.
In the step of applying the filler, a cross-sectional shape obtained by cutting the filler perpendicularly to the substrate may be a semicircular shape.
In the step of coating the filler, the height of the filler coated on the substrate may be 10 to 20 μm.
In the step of coating the filler, the filler coated on the substrate may have a width of 200 to 300 μm.
According to the method of manufacturing an organic light emitting display device as described above, the scattering bodies located in the filling layer can be uniformly distributed.
Further, the scattering body can be uniformly distributed in the filling layer, so that the light emitted from the organic light emitting element is uniformly scattered, thereby preventing the spots from being seen.
Drawings
Fig. 1 is a schematic cross-sectional view of an organic light emitting display device manufactured based on a method of manufacturing an organic light emitting display device according to an embodiment of the present invention.
Fig. 2 to 5 are views sequentially showing a method of manufacturing an organic light emitting display device according to an embodiment of the present invention.
Fig. 6 is an enlarged view of the M region of fig. 5.
Fig. 7 is an enlarged view showing a filling material in which gas is not injected.
Description of the symbols
100: substrates 210, 220, 230: organic light emitting element
300: pixel defining film 400: filling layer
500: the cover layer 600: BM
700. 720 and 730: the color filter layer 800: coating device
810: a main body 820: multiple nozzles
900: gas injection device 920: multiple gas injection ports
Detailed Description
The present embodiments are described in detail below with reference to the accompanying drawings so that those having a basic knowledge in the art can easily carry out the present invention. The present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. In order to more clearly explain the present invention, portions of the drawings that are not related to the description are omitted, and the same or similar components are given the same reference numerals throughout the specification.
In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to the size and thickness shown in the drawings.
In the drawings, the thickness of each layer, region, and the like is exaggerated for clarity of description. Also, the thickness of some layers and regions are exaggerated in the drawings for convenience of explanation. When it is stated that a part of a layer, film, region, plate, etc. is "on" or "over" another part, it includes the case of being located immediately above the other element, and also includes the case of having another part between the two.
Throughout the specification, unless explicitly stated to the contrary, when a certain portion is referred to as "comprising (including)" another constituent element, it means that the other constituent element may be included without excluding the other constituent element. In the entire specification, "up" means being located above or below the target portion, and does not necessarily mean being located above with reference to the direction of gravity.
Hereinafter, a method of manufacturing an organic light emitting display device according to an embodiment of the present invention will be described with reference to fig. 1 to 5.
Fig. 1 is a schematic cross-sectional view of an organic light emitting display device manufactured based on a method of manufacturing an organic light emitting display device according to an embodiment of the present invention; fig. 2 to 5 are views sequentially showing a method of manufacturing an organic light emitting display device according to an embodiment of the present invention.
Referring to fig. 1 to 5, in the method of manufacturing the organic light emitting display device according to the embodiment of the present invention, the filling substances P1, P2, P3, P4 are coated so that the filling layer 400 is uniformly disposed on the organic light emitting elements 210, 220, 230, and then gas is injected to the filling substances P1, P2, P3, P4. In particular, when the gas is injected into the filler materials P1, P2, P3, and P4, the scatterers R included in the filler layer 400 can be uniformly distributed in the filler layer 400. Hereinafter, a process of forming the filling layer 400 will be mainly described with reference to fig. 2 to 5.
First, an organic light emitting element is formed over a substrate S. In fig. 2, illustration of the organic light emitting elements formed on the substrate S is omitted, but as shown in fig. 1, the organic light emitting elements 210, 220, 230 are formed on the substrate S.
In this case, the organic light emitting elements 210, 220, and 230 include pixel electrodes, organic light emitting layers, and common electrodes, and may be located in openings formed by pixel defining films (pixel defining layers) 300. In addition, not only the organic light-emitting element and the pixel defining film but also a plurality of insulating layers, thin film transistors, and the like may be formed over the substrate S. The organic light emitting element, the pixel defining film, the thin film transistor, and the like are known components included in the organic light emitting display device, and detailed description thereof will be omitted.
Next, as shown in fig. 2, the substrates S on which the organic light emitting elements are formed are coated with filling materials P1, P2, P3, and P4. When the manufacturing process is completed, the filling materials P1, P2, P3, and P4 form a filling layer 400 on the organic light emitting device (see fig. 1).
At this time, the filling materials P1, P2, P3, and P4 are applied to the substrate S on which the organic light emitting element is formed by the application apparatus 800. Specifically, the filling materials P1, P2, P3, P4 are applied onto the organic light emitting elements through a plurality of nozzles 820 formed in the body 810 of the coating apparatus 800.
According to the present embodiment, the filling substances P1, P2, P3, P4 may be coated in a linear form on the substrate S on which the organic light emitting elements are formed. Here, the filling materials P1, P2, P3, P4 may be coated in a plurality of linear forms at the same time.
Referring to fig. 2 and 3, the coating apparatus 800 simultaneously coats the filling materials P1, P2, P3, P4 into a plurality of linear forms through a plurality of nozzles 820.
For example, as shown in fig. 3, the coating apparatus 800 moves in a first direction (Y direction in the drawing) on the substrate S using four nozzles 820, and simultaneously coats the filling materials P1, P2, P3, P4 on the substrate S on which the organic light emitting elements are formed.
After the filling materials P1, P2, P3, P4 are coated in the first direction, the coating apparatus 800 moves in the second direction (X-axis direction in the drawing) crossing the first direction and recoats the filling materials P alongside the coated filling materials P1, P2, P3, P4.
The above process is repeated to cover the entire substrate S on which the organic light emitting element is formed with the filler. In fig. 2 and 3, the filling materials P1, P2, P3, and P4 are illustrated as being coated four at a time, but the present invention is not limited thereto, and may be coated two, three, five, or more at a time.
In addition, the filling materials P1, P2, P3, P4 coated in a linear state are arranged in parallel with each other. At this time, the plurality of filling materials P1, P2, P3, P4 may be arranged such that the pitches B1 between adjacent filling materials are the same. For example, the distance B1 between the adjacent filling materials P1, P2, P3 and P4 may be coated to be 40 to 60 μm.
Also, a plurality of filling substances P1, P2, P3, P4 may be coated to the same height C1. The filling materials P1, P2, P3, and P4 are applied to the same height C1 as each other so that the filling layer 400 formed on the organic light emitting element has a certain height. Also, the widths a1 of the respective filling substances P1, P2, P3, P4 may also be coated to be the same as each other. For example, the filling materials P1, P2, P3 and P4 may have a width A1 of 200-300 μm and a height C1 of 10-20 μm.
That is, the coating apparatus 800 may form the filling materials P1, P2, P3, and P4 coated on the substrate S on which the organic light emitting elements are formed to have the same width a1 and height C1, and the spacing B1 between the adjacent filling materials P1, P2, P3, and P4 may be formed to have a constant spacing B1.
According to the present embodiment, the filling materials P1, P2, P3, P4 coated on the substrate S formed with the organic light emitting elements may be in a liquid state having a certain viscosity. Accordingly, the cross-sectional shape of the applied filling materials P1, P2, P3, P4 may be a semicircular shape.
The filler materials P1, P2, P3, and P4 may include a polymer resin Q and a plurality of scatterers (scatterers) R. The scattering body R can scatter light emitted from the organic light emitting element, thereby improving the visibility and light extraction efficiency of the organic light emitting display device.
In this case, the polymer resin Q may include at least one of polycarbonate, polyethylene, methacrylic resin, polyethylene terephthalate, and polystyrene. The polymer resin Q can fix the scatterers R in a state of being uniformly distributed in the filling layer 400 (see fig. 1). In addition, the overcoat layer 500 and the color filter layers 700, 720, and 730 disposed between the BM (Black Matrix) layers 600 are disposed on the filling layer 400, and thus, the polymer resin Q may maintain a certain distance between the overcoat layer 500 and the color filter layers 700, 720, and 730 and the organic light emitting elements 210, 220, and 230.
The scatterer R may include at least one metal selected from the group consisting of gold, silver, aluminum, platinum, palladium, cadmium, cobalt, ruthenium, copper, indium, nickel, and iron. As described above, the scatterer R can uniformly scatter the light emitted from the organic light emitting element.
Here, the shape of the scatterer R may be a sphere. However, without being limited thereto, various polygonal shapes, which may be regular or irregular, may be employed.
According to the present embodiment, after the filling substances P1, P2, P3, P4 in liquid state are applied, gas is injected to the filling substances P1, P2, P3, P4. Referring to fig. 4, the gas injection device 900 moves along the applied filling materials P1', P2', P3', and P4' and injects gas toward the filling materials P1, P2, P3, and P4. At this time, the gas may be injected to the filling materials P1, P2, P3, P4 in a liquid state along a direction perpendicular to the substrate S.
The plurality of gas injection ports 920 formed in the main body 910 of the gas injection device 900 may be formed in a plurality corresponding to the plurality of nozzles 820 of the coating device 800. For example, the gas injection ports 920 may be formed in four to correspond to the four nozzles 820. However, the number of the gas injection ports 920 is not limited thereto, and may be formed more or less than the nozzles 820.
Similarly, the gas injection device 900 injects gas into the filler materials P1, P2, P3, and P4 while moving along the filler materials P1', P2', P3', and P4' to be coated by the four gas injection ports 920. That is, the four gas injection ports 920 inject gas to the filler materials P1, P2, P3, and P4, respectively.
Referring to fig. 5, the gas injection device 900 moves in a first direction (Y-axis direction in the drawing) on the substrate S while injecting gas toward the filling material P', as in the coating device 800. Further, after the gas is ejected in the first direction, the gas ejection device 900 moves in a second direction (X-axis direction in the drawing) intersecting the first direction, thereby ejecting the gas to the adjacent filling material. The above process is repeated to inject the gas over the entire fill mass.
Further, as the gas to be sprayed to the filling materials P1, P2, P3, and P4, nitrogen (N) gas may be used2) Or cool Dry Air (Cooling Dry Air: CDA). However, without being limited thereto, air in the atmosphere may also be used.
According to the present embodiment, the height C2 of the filling substances P1', P2', P3', P4' of the injected gas becomes lower than the height C1 of the filling substances P1, P2, P3, P4 before the gas is injected. For example, the filler materials P1', P2', P3 'and P4' may have a height C2 of 2 to 10 μm.
In addition, as the heights of the filling substances P1', P2', P3', and P4' become lower, the widths a2 of the filling substances P1', P2', P3', and P4' become wider than the widths a1 of the filling substances P1, P2, P3, and P4 before the gas is injected.
Further, if the width a2 of each of the filling substances P1', P2', P3', P4' is increased, the interval B2 between the adjacent filling substances P1', P2', P3', P4' will be smaller than the interval B1 between the filling substances P1, P2, P3, P4. At this time, the interval B2 between the filling substances P1', P2', P3', P4' may be formed to be close to 0.
That is, it is also possible to realize that, if the gas is injected, the space B2 between the filling substances P1', P2', P3', P4' is removed to form the filling substances P1', P2', P3', P4' into one layer (layer). As shown in fig. 5, the division of the filler materials P1', P2', P3 'and P4' can be eliminated by the injection of gas for the filler materials P1, P2, P3 and P4 indicated by solid lines in fig. 3. The dotted lines in fig. 5 indicate that the spaces between the filling materials P1', P2', P3', P4' have disappeared.
According to the present embodiment, it is possible to inject gas to the filling materials P1, P2, P3, P4 to uniformly arrange the scatterers R within the polymer resin Q. When the gas is injected, the scatterers R are uniformly distributed together with the polymer resin Q, and therefore, as shown in fig. 6, the partitions between the filler materials P1', P2', P3', and P4' are eliminated, and the scatterers R are uniformly arranged.
Fig. 7 is an enlarged view showing a filling material from which no gas is injected, and if the overcoat layer 500 and the color filter layers 700, 720, and 730 are disposed on the filling materials P1", P2", P3", and P4", the scatterer R will be mainly located in the central region of the filling materials P1", P2", P3", and P4", as shown in fig. 7. As described above, in the case where the gas is not injected into the filler, the scattering bodies R cannot be uniformly arranged, and thus the light emitted from the organic light emitting element is not uniformly scattered, and spots or the like can be seen.
However, according to the present embodiment, as shown in fig. 6, the scatterers R are uniformly distributed in the filling materials P1', P2', P3', P4', so that light emitted from the organic light emitting element is uniformly scattered, and thus, no spots or the like occur.
Further, after injecting gas into the filler materials P1, P2, P3, and P4, the filler materials P1', P2', P3', and P4' may be solidified. The scatterers R contained in the filler materials P1', P2', P3', and P4' can be fixed by solidifying the filler materials P1', P2', P3', and P4' in a liquid state. In this embodiment, in order to cure the liquid filling materials P1', P2', P3 'and P4', thermal curing, ultraviolet curing, or the like may be used.
However, in the method of manufacturing the organic light emitting display device according to the present embodiment, the step of curing may be omitted. Instead of curing the filling substances P1', P2', P3', P4', the overcoat layer 500 and the color filter layers 700, 720, 730 may be arranged directly on the filling substances P1', P2', P3', P4' after spraying gas on the filling substances P1, P2, P3, P4. Alternatively, the filling materials P1', P2', P3', P4' in a liquid state may be cured after the overcoat layer 500 and the color filter layers 700, 720, 730 are disposed.
In the method of manufacturing the organic light emitting display device according to an embodiment of the present invention, the gas may be injected to the liquid filling materials P1, P2, P3, P4 coated in a plurality of linear shapes such that the scatterers R contained in the filling materials P1', P2', P3', P4' are uniformly arranged within the filling layer.
As described above, the present invention has been described with reference to the limited embodiments and the accompanying drawings, but the present invention is not limited thereto, and various modifications and variations can be made by those having a basic knowledge in the technical field to which the present invention belongs within a range equivalent to the technical idea of the present invention and the range described in the claims.
Claims (8)
1. A method of manufacturing an organic light emitting display device, comprising the steps of:
preparing a substrate;
forming an organic light emitting element on the substrate;
coating a filling material in a liquid state on the organic light emitting element, wherein the filling material comprises a high polymer resin and a scatterer;
injecting a gas to the filling material in a liquid state so that the scatterer is uniformly arranged within the polymer resin.
2. The method of manufacturing an organic light emitting display device according to claim 1,
in the step of applying the filling substance, the filling substance is applied in a linear form extending in a first direction on the substrate.
3. The method of manufacturing an organic light emitting display device according to claim 2,
in the step of applying the filling material, the filling material is simultaneously applied in a plurality of linear forms.
4. The method of manufacturing an organic light emitting display device according to claim 3,
the plurality of straight lines are parallel to each other.
5. The method of manufacturing an organic light emitting display device according to claim 4,
the distance between a pair of adjacent straight lines in the plurality of straight lines is 40-60 mu m.
6. The method of manufacturing an organic light emitting display device according to claim 1,
the polymer resin includes at least one selected from the group consisting of polycarbonate, polyethylene, methacrylic resin, polyethylene terephthalate, and polystyrene.
7. The method of manufacturing an organic light emitting display device according to claim 1,
the scatterer includes at least one metal selected from the group consisting of gold, silver, aluminum, platinum, palladium, cadmium, cobalt, ruthenium, copper, indium, nickel, and iron.
8. The method of manufacturing an organic light emitting display device according to claim 1,
the gas is nitrogen or cool dry air.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2016-0003780 | 2016-01-12 | ||
| KR1020160003780A KR102517372B1 (en) | 2016-01-12 | 2016-01-12 | Method of manufacturing organic light emitting diode display |
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| Publication Number | Publication Date |
|---|---|
| CN106960918A CN106960918A (en) | 2017-07-18 |
| CN106960918B true CN106960918B (en) | 2020-10-16 |
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| CN201710021875.3A Active CN106960918B (en) | 2016-01-12 | 2017-01-12 | Method for manufacturing organic light emitting display device |
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| JP4179276B2 (en) * | 2004-12-24 | 2008-11-12 | セイコーエプソン株式会社 | Solvent removal apparatus and solvent removal method |
| TWI472076B (en) * | 2012-07-31 | 2015-02-01 | Mitsubishi Rayon Co | Light extraction film for el element, planar light emitting body and method for producing light extraction film for el element |
| JP5914826B2 (en) * | 2012-11-20 | 2016-05-11 | パナソニックＩｐマネジメント株式会社 | Light emitting module, lighting device and lighting fixture |
| JP2015114588A (en) * | 2013-12-13 | 2015-06-22 | 東洋インキＳｃホールディングス株式会社 | Resin composition for light-scattering layer, light-scattering layer, and organic electroluminescence device |
| US9324965B2 (en) * | 2014-04-22 | 2016-04-26 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Method and system for an organic light emitting diode structure |
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| KR20170084746A (en) | 2017-07-21 |
| CN106960918A (en) | 2017-07-18 |
| KR102517372B1 (en) | 2023-04-03 |
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