Display device and method of manufacturing the same

Abstract

An embodiment of the present disclosure discloses a display device and a method for manufacturing the same. The display device, as a defining layer configured between light control components, includes a first defining layer having a biased configuration structure in which a fluorine-containing polymer is aggregated toward one side surface and a second defining layer having no biased configuration structure of the fluorine-containing polymer.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a display device and a method for manufacturing the same, and more particularly, to a display device using a quantum dot thin film layer and a method for manufacturing the same. Background Art

[0002] For example, display devices such as organic light-emitting display devices generate light through the principle that holes and electrons injected into the anode and cathode recombine in the light-emitting layer to emit light, thereby realizing images. For example, it has pixels that emit light in one of the hues of red, green, and blue, and the desired color is expressed through a combination of these hues.

[0003] To this end, each pixel is equipped with an organic light-emitting element that generates monochromatic light such as white or blue, and a quantum dot film layer and a color filter as a light control member that converts the monochromatic light into a desired hue among red, green and blue and emits the light. That is, if the organic light-emitting element of each pixel generates monochromatic light, the monochromatic light is converted into a hue among red, green and blue while passing through the quantum dot film layer and the color filter, and an image of a desired color is realized by combining the hues of pixels that emit light in appropriate hues. Summary of the invention

[0004] However, a bank forming the boundary between pixels is formed between the light control components, and the bank often disappears during the manufacturing process, and the boundary between pixels disappears. If this happens, the light control components cannot be formed in the correct area because they are formed without boundary lines, which ultimately leads to a high possibility of product defects such as color mixing between pixels.

[0005] Therefore, embodiments of the present disclosure provide a display device and a method for manufacturing the same that are improved in a manner that can effectively suppress the possibility of color mixing between adjacent pixels caused by the disappearance of such a defining layer.

[0006] An embodiment of the present disclosure provides a display device, comprising: a first substrate, configured with a plurality of organic light-emitting elements; and a second substrate, having a plurality of light control components corresponding to the plurality of organic light-emitting elements and a plurality of defining layers configured between the plurality of light control components, and the second substrate is bonded to the first substrate, and the plurality of defining layers include: a first defining layer, having a biased configuration structure in which a fluorine-containing polymer is aggregated toward one side surface; and a second defining layer, not having a biased configuration structure of the fluorine-containing polymer.

[0007] Alternatively, the fluorine-containing polymer may include perfluoropolyether (PFPE).

[0008] The surface of the first defining layer on which the fluorine-containing polymer is disposed may exhibit liquid repellency.

[0009] The second defining layer may be made of any one of perfluoropolyether (PFPE), acrylic resin, silicone resin, and epoxy resin.

[0010] The second defining layer may further include a coating layer on a surface corresponding to the one surface of the first defining layer.

[0011] It may be that the coating comprises a liquid repellent material.

[0012] It may be that the plurality of organic light emitting elements all generate blue light.

[0013] The light control member may include at least one of a quantum dot thin film layer that changes the color of light generated in the organic light emitting element and a color filter layer that improves the color purity of the light.

[0014] In addition, an embodiment of the present disclosure provides a method for manufacturing a display device, including: a step of forming a plurality of organic light-emitting elements on a first substrate; a step of forming a plurality of color filter layers corresponding to the plurality of organic light-emitting elements on a second substrate; a step of forming a plurality of first defining layers at positions between the plurality of color filter layers of the second substrate; a step of checking whether the first defining layers disappear; a repairing step of forming a second defining layer at a position where the first defining layers disappear; a step of selectively forming a quantum dot thin film layer on the plurality of color filter layers; and a step of bonding the first substrate and the second substrate.

[0015] It may be that the step of forming the multiple first defining layers includes: the step of coating a composite polymer mixed with a fluorine-containing polymer and a fluorine-free polymer on the second substrate; the step of heating the composite polymer to cause the fluorine-containing polymer to gather and be biased toward one side surface of the first defining layer; and the step of patterning the composite polymer to remain in a position between the color filter layers.

[0016] Alternatively, the fluorine-containing polymer may include perfluoropolyether (PFPE).

[0017] Alternatively, the method for manufacturing the display device further includes forming a liquid-repellent coating on a surface of the second defining layer corresponding to the one side surface of the first defining layer.

[0018] The step of forming the second defining layer may include: disposing a mask having an opening on the second substrate; and injecting a material of the second defining layer through the opening to a position where the first defining layer disappears.

[0019] The step of injecting the material of the second defining layer may include any one of a step of irradiating the material of the second defining layer with laser to inject the material into the opening in a molten state and a step of pressurizing the material of the second defining layer to extrude the material through the opening.

[0020] The material of the second defining layer may be any one of perfluoropolyether (PFPE), acrylic resin, silicone resin, and epoxy resin.

[0021] The organic light emitting element may generate blue light, and the quantum dot thin film layer may be formed at a position where the blue light is to be changed into either red light or green light.

[0022] Other aspects, features, and advantages besides the foregoing will become apparent from the following drawings, the disclosure, and the detailed description of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of a display device according to an embodiment of the present disclosure.

[0024] Figure 2a and Figure 2b is described in Figure 1 A cross-sectional view showing a repair process when a definition layer in a display device is damaged.

[0025] Figure 3a to Figure 3g It is shown in sequence Figure 1 A cross-sectional view of the manufacturing process of the display device shown.

[0026] Figure 4 is a cross-sectional view of a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The present disclosure can be subjected to various changes and various embodiments. Specific embodiments are illustrated in the accompanying drawings and described in detail in the detailed description. The effects, features and methods for achieving the effects, features and methods of implementing ... Figure 1 This will become clear from the embodiments described below in detail. However, the present disclosure is not limited to the embodiments disclosed below, and can be implemented in various forms.

[0028] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. When describing with reference to the drawings, the same or corresponding components are denoted by the same reference numerals, and repeated description thereof will be omitted.

[0029] In the following embodiments, the terms "first" and "second" are not restrictive but are used to distinguish one constituent element from other constituent elements.

[0030] In the following embodiments, unless otherwise clearly indicated in the context, an expression in the singular includes an expression in the plural.

[0031] In the following embodiments, the terms including or having mean that the features or constituent elements described in the specification are present, and do not preclude the possibility of adding one or more other features or constituent elements.

[0032] In the drawings, the size of the components may be exaggerated or reduced for the convenience of explanation. For example, the size and thickness of each structure shown in the drawings are arbitrarily shown for the convenience of explanation, and the present disclosure is not necessarily limited to the drawings.

[0033] When a certain embodiment can be implemented in different ways, a specific process sequence can also be performed differently from the described sequence. For example, two processes described successively can be performed substantially simultaneously, or in a sequence opposite to the described sequence.

[0034] In the following embodiments, when it is described that a film, region, constituent element, etc. is connected, it includes not only the case where the film, region, constituent element is directly connected, but also the case where the film, region, constituent element is indirectly connected with other films, regions, constituent elements in between. For example, in this specification, when it is described that a film, region, constituent element, etc. is electrically connected, it includes not only the case where the film, region, constituent element, etc. is directly electrically connected, but also the case where the film, region, constituent element, etc. is indirectly electrically connected with other films, regions, constituent elements, etc. in between.

[0035] Figure 1 1 is a cross-sectional view of a display device according to an embodiment of the present disclosure. Here, only one set of three-color pixels of red, green and blue is shown, and it can be regarded that there are multiple sets of such three-color pixels distributed in the actual product.

[0036] As shown in the figure, the display device of this embodiment is composed of a structure in which a first substrate 110 equipped with an organic light-emitting element 120 and a second substrate 210 equipped with quantum dot film layers 230R, 230G and color filter layers 220R, 220G, 220W as light control components are bonded together with a filler 300 in between.

[0037] First, the organic light emitting element 120 has a structure in which an organic light emitting layer 123 is interposed between an anode electrode 122 and a cathode electrode 124, and generates light by the principle that holes and electrons injected from the two electrodes 122 and 124 recombine in the organic light emitting layer 123 to emit light. The light generated at this time is the same blue light generated by all red, green, and blue pixels. That is, the same blue light is generated in the organic light emitting element 120, and the function of converting it into red, green, and blue is the responsibility of the light control member of each pixel.

[0038] Reference numeral 121 indicates a pixel circuit connected to the anode electrode 122, including elements such as a thin film transistor and a capacitor. In addition, reference numeral 130 indicates a thin film encapsulation layer that covers and protects the organic light-emitting element 120, which can be a single layer of an organic film or an inorganic film, or a multilayer film in which organic and inorganic films are alternately stacked. The inorganic film may include silicon oxide, silicon nitride and / or silicon oxynitride, and the organic film may include polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, sodium polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, acrylic resin (e.g., polymethyl methacrylate, polyacrylic acid, etc.) or any combination thereof.

[0039] As the light control member, quantum dot film layers 230R, 230G and color filter layers 220R, 220G, 220W are provided. The quantum dot film layers 230R, 230G play a role in converting the blue light generated in the organic light emitting element 120 into a desired hue of red or green, and the color filter layers 220R, 220G, 220W play a role in filtering a part of stray light that may be mixed in the converted hue to improve the color purity. Here, the reason why the red pixel and the green pixel are provided with quantum dot film layers 230R, 230G and color filter layers 220R, 220G, and only the white color filter layer 220W is provided in the blue pixel is that the light generated in the organic light emitting element 120 is blue light. That is, in the blue pixel, there is no need to change the color of the light and it can be directly passed, so only the white color filter layer 220W is provided for filtering stray light.

[0040] Reference numeral 250 denotes a black matrix disposed between pixels for light shielding, and reference numeral 240 denotes a defining layer for establishing a boundary between light control members for each pixel.

[0041] The defining layer 240 has a liquid-repellent property on a side surface that is mostly facing the first substrate 110. This is a measure to prevent the surface of one side of the defining layer 240 from being contaminated by droplets sprayed from the injector when the quantum dot film layers 230R and 230G are formed by spraying during the manufacturing process. For this purpose, the internal fluorine-containing polymer has a biased configuration structure that gathers on one side of the surface. However, a part of the defining layer 240 does not have this biased configuration structure. This is a repair defining layer made by re-forming a new defining layer 240a at the disappeared position when a part of the defining layer 240 disappears.

[0042] Hereinafter, the majority of the defining layers having the biased configuration structure are referred to as first defining layers, and the minority of the repair defining layers are referred to as second defining layers. Figure 2a and Figure 2b 2 is a diagram describing a process of repairing and forming a second defining layer 240a at the location of the lost first defining layer 240. That is, it may be, for example Figure 2a As shown, after a mask 410 is placed on the second substrate 210 and an opening 411 is aligned with the position to be repaired, the material 240a-1 of the second defining layer 240a is placed and irradiated with a laser 400 to melt, so that the material 240a-1 melts into the opening 411 and forms the second defining layer 240a. Alternatively, as Figure 2b As shown, after configuring the mask 510 on the second substrate 210 and aligning the opening 511 to the position to be repaired, the material 240a-1 of the second defining layer 240a is placed and pressed by the pressurizer 500, so that the material 240a-1 is pushed into the opening 511 and squeezed out, thereby forming the second defining layer 240a.

[0043] In this way, the second defining layer 240a is immediately repaired and formed at the position where the first defining layer 240 disappears, so that the boundary between pixels does not collapse and color mixing is effectively prevented. The detailed manufacturing process of the first defining layer 240 and the second defining layer 240a will be described again later.

[0044] Next, a filler 300 is interposed between the first substrate 110 and the second substrate 210, and the filler 300 has both the function of a gap-maintaining portion for maintaining an appropriate interval between the two substrates 110 and 210 and the function of an adhesive. Therefore, if the filler 300 is applied between the two substrates 110 and 210 and then bonded, the filler 300 plays the role of maintaining an appropriate gap between the two substrates 110 and 210 while firmly bonding them.

[0045] The display device with the above structure can be Figure 3a to Figure 3g The process shown is used to manufacture.

[0046] First, if Figure 3aAs shown, an organic light emitting element 120 is formed on a first substrate 110 and covered with a thin film encapsulation layer 130 .

[0047] Furthermore, on the second substrate 210, as Figure 3b As shown, the black matrix 250 and the color filter layers 220R, 220G, and 220W are formed by photolithography. The color filter layers 220R, 220G, and 220W are formed at positions corresponding to the organic light emitting elements 120 .

[0048] Then, if Figure 3c As shown, on the color filter layers 220R, 220G, 220W and the black matrix 250, for example, a composite polymer 240-1 mixed with a fluorine-containing polymer 240-1a such as perfluoropolyether (PFPE) and a fluorine-free polymer 240-1b such as acrylic acid, silicone resin or epoxy resin is coated and heated. That is, a composite polymer 240-1 mixed with a fluorine-containing polymer 240-1a containing fluorine (F) and a fluorine-free polymer 240-1b not containing fluorine is prepared, and is coated and heated on the color filter layers 220R, 220G, 220W and the black matrix 250. The composite polymer 240-1 is a material that will become the first defining layer 240 later. If the composite polymer 240-1 is heated, the fluorine-containing polymer 240-1a present in the interior moves to the side surface side and is biased. As a result, the side surface where the fluorine-containing polymer 240-1a is gathered has liquid repellency.

[0049] Moreover, if Figure 3d As shown, the composite polymer 240-1 is patterned to remain between the color filter layers 220R, 220G, and 220W between each pixel. That is, the first definition layer 240 is manufactured in a manner to establish the boundaries between each pixel. At this time, during the above-mentioned coating, heating, and patterning, the first definition layer 240 may disappear at some positions. This can be found during the inspection process using a camera after the patterning of the first definition layer 240. Figure 3d 2 is a diagram illustrating a case where the first definition layer 240 between the color filter layer 220R and the color filter layer 220G disappears.

[0050] In this way, if the disappearance of the first defining layer 240 is found, Figure 3e As shown in FIG. 1 , a second defining layer 240a is formed and repaired at the disappeared position. The repair method is the same as that in FIG. Figure 2a and Figure 2bThe same as described in . That is, after the mask 410, 510 is placed on the second substrate 210 and aligned with the openings 411, 511 at the disappearing position, the material 240a-1 is thrown through the openings 411, 511 using the laser 400 or the pressurizer 500 to form the second defining layer 240a. As the material 240a-1 of the second defining layer 240a, a composite polymer of the same material as the first defining layer 240 can be used, or one of the liquid-repellent perfluoropolyether (PFPE) and non-liquid-repellent acrylic resin, silicone resin, and epoxy resin can be used. The second defining layer 240a is manufactured as a repair defining layer by melting or extrusion for a very small part of the position where the first defining layer 240 disappears, so a heat treatment process that makes the fluorine-containing polymer skewed as the first defining layer 240 is not separately performed. Therefore, it is not necessary to use a fluorine-containing polymer, nor is it necessary to be a liquid-repellent material. Because the disappearance of the first defining layer 240 usually occurs at a rate of 1 / 10000, the probability that the second defining layer 240a at the position of 1 / 10000 will affect the product quality is very small, regardless of whether it is liquid-repellent or non-liquid-repellent. However, it is a fact that making one side surface of the second defining layer 240a also liquid-repellent can ensure further stable quality. For this reason, it is also possible to add Figure 3e As shown in the figure, a liquid repellent coating 240a' of a material such as perfluoropolyether (PFPE) is formed on the surface of the second defining layer 240a. In this way, a stable defining layer structure is formed in which the position where the first defining layer 240 disappears is immediately repaired and the second defining layer 240a is formed.

[0051] Afterwards, if Figure 3f As shown, blue pixels are removed, and quantum dot film layers 230R and 230G are selectively formed only on red pixels and green pixels. At this time, the quantum dot film layers 230R and 230G are formed at positions where they overlap with the color filter layers 220R and 220G. The quantum dot film layers 230R and 230G can be formed by a spraying process, and the boundaries between pixels are clearly defined by the first defining layer 240 and the second defining layer 240a, so there is no possibility of color mixing in the spraying process.

[0052] On the other hand, the quantum dots or cores as photochromic particles included in the quantum dot film layers 230R and 230G may be selected from II-VI compounds, III-V compounds, IV-VI compounds, IV elements, IV compounds, and combinations thereof.

[0053] The II-VI compound can be selected from the group consisting of a binary compound selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and a mixture thereof, a binary compound selected from the group consisting of AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdH The invention can be selected from a group consisting of a ternary compound selected from the group consisting of CdS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and a mixture thereof, and a group consisting of a ternary compound selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and a mixture thereof.

[0054] The III-V compounds can be selected from the group consisting of binary compounds selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof, ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP and mixtures thereof, and quaternary compounds selected from the group consisting of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof.

[0055] The IV-VI compound can be selected from the group consisting of a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof, a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof, and a ternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. The IV group element can be selected from the group consisting of Si, Ge and mixtures thereof. The IV group compound can be a binary compound selected from the group consisting of SiC, SiGe and mixtures thereof.

[0056] At this time, the binary compound, ternary compound or quaternary compound may be present in the particle at a uniform concentration or in the same particle in a state where the concentration distribution is locally different. In addition, a core / shell structure in which one quantum dot surrounds another quantum dot may be provided. The interface between the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center.

[0057] In several embodiments, the quantum dot may have a core-shell structure including a core and a shell, wherein the core includes nanocrystals and the shell surrounds the core. The shell of the quantum dot can perform the role of a protective layer for preventing the chemical denaturation of the core and maintaining the semiconductor properties and / or the role of a charging layer for imparting electrophoretic properties to the quantum dot. The shell may be a single layer or a multilayer. The interface between the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center. As examples of the shell of the quantum dot, metal or non-metal oxides, semiconductor compounds, or combinations thereof may be cited.

[0058] For example, the metal or non-metal oxide may be SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 , NiO and other binary compounds or MgAl 2 O 4 、CoFe2 O 4 、NiFe 2 O 4 、CoMn 2 O 4 The present invention also provides ternary compounds such as , but the present disclosure is not limited thereto.

[0059] Furthermore, the semiconductor compound may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but the present disclosure is not limited thereto.

[0060] The quantum dots may have a full width at half maximum (FWHM) of a light emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, which can improve color purity or hue reproducibility in this range. In addition, the light emitted by the quantum dots is emitted in a forward direction, which can improve the light viewing angle.

[0061] In addition, the morphology of quantum dots is the morphology commonly used in this field and is not particularly limited, but more specifically, spherical, pyramidal, multi-arm, or cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoplate-like particles and the like can be used.

[0062] Quantum dots can adjust the hue of the emitted light according to the particle size, so that quantum dots can have a variety of luminescent hues such as blue, red, and green.

[0063] After forming the quantum dot thin film layers 230R and 230G, Figure 3g As shown, a filler 300 is applied between the first substrate 110 and the second substrate 210 and the two substrates 110 and 210 are bonded. Figure 1 The display device shown includes an organic light emitting element 120, quantum dot film layers 230R, 230G, and color filter layers 220R, 220G, and 220W.

[0064] Furthermore, at this time, the first defining layer 240 and the second defining layer 240a clearly define the pixels, so defects due to color mixing are almost non-existent. Therefore, a display device with very stable quality can be realized.

[0065] On the other hand, in this embodiment, the organic light emitting layer 123 of the organic light emitting element 120 is formed as a common layer across the entire pixel region, but it may also be as follows. Figure 4That is, the organic light emitting layer 123 can be formed as a common layer or can be formed in a state where each pixel is separated. In this case, if the first defining layer 240 and the second defining layer 240a are firmly maintained to prevent color mixing, the same effect as the above-mentioned embodiment can be expected.

[0066] Therefore, as described above, by using the display device and the manufacturing method thereof according to the embodiments of the present disclosure, the defining layer that disappears during the manufacturing process can be quickly repaired, thereby suppressing the color mixing between pixels caused by the disappearance of the defining layer and achieving a clean and clear hue image, ultimately achieving the effect of improving the performance and reliability of the product.

[0067] The present disclosure is described with reference to the embodiments shown in the accompanying drawings, but this is only illustrative, and a person with ordinary knowledge in the art should understand that various modifications and variations of the embodiments can be made therefrom. Therefore, the true technical protection scope of the present disclosure should be determined by the disclosed technical concept.

Claims

1. A display device, wherein: include: A first substrate is provided with a plurality of organic light emitting elements; and The second substrate includes a plurality of light control members corresponding to the plurality of organic light emitting elements and a plurality of defining layers arranged between the plurality of light control members, and the second substrate is bonded to the first substrate. The plurality of defined layers include: The first defining layer has a biased configuration structure in which the fluorine-containing polymer is aggregated toward one side surface; as well as The second defining layer does not have the biased configuration structure, The second defining layer is formed at a position where the first defining layer disappears.

2. The display device according to claim 1, wherein: The fluorine-containing polymer includes perfluoropolyether.

3. The display device according to claim 1, wherein: The surface of the first defining layer on which the fluorine-containing polymer is disposed is biased to exhibit liquid repellency.

4. The display device according to claim 1, wherein: The second defining layer includes any one of perfluoropolyether, acrylic resin, silicone resin, and epoxy resin.

5. The display device according to claim 1, wherein: A coating layer is further provided on a surface of the second defining layer corresponding to the one surface of the first defining layer.

6. The display device according to claim 5, wherein: The coating includes a liquid repellent material.

7. The display device according to claim 1, wherein: The plurality of organic light emitting elements all generate blue light.

8. The display device according to claim 1, wherein: The light control member includes at least one of a quantum dot thin film layer that changes the color of light generated in the organic light emitting element and a color filter layer that improves the color purity of the light.

9. A method for manufacturing a display device, wherein: include: forming a plurality of organic light emitting elements on a first substrate; forming a plurality of color filter layers corresponding to the plurality of organic light emitting elements on the second substrate; The step of coating a composite polymer mixed with a fluorine-containing polymer and a fluorine-free polymer on the second substrate and the color filter layer; The step of heating the composite polymer to make the fluorine-containing polymer gather on one surface and be arranged in a biased manner; The step of patterning the composite polymer to form a first defining layer; A step of checking whether the first defining layer disappears; A repairing step of forming a second defining layer without a biased configuration structure at a location where the first defining layer disappears; A step of selectively forming a quantum dot thin film layer on the plurality of color filter layers; as well as The step of bonding the first substrate and the second substrate.

10. The method for manufacturing a display device according to claim 9, wherein: The fluorine-containing polymer includes perfluoropolyether.

11. The method for manufacturing a display device according to claim 9, wherein: The method for manufacturing a display device further includes forming a liquid-repellent coating on a surface of the second defining layer corresponding to the one side surface of the first defining layer.

12. The method for manufacturing a display device according to claim 9, wherein: The step of forming the second defining layer comprises: The steps of: disposing a mask having an opening on the second substrate; and injecting a material of the second defining layer through the opening to a position where the first defining layer disappears.

13. The method for manufacturing a display device according to claim 12, wherein: The step of injecting the material of the second defining layer includes any one of the step of irradiating the material of the second defining layer with laser to inject the material into the opening in a molten state and the step of pressurizing the material of the second defining layer to extrude the material through the opening.

14. The method for manufacturing a display device according to claim 12, wherein: The material of the second defining layer includes any one of perfluoropolyether, acrylic resin, silicone resin, and epoxy resin.

15. The method for manufacturing a display device according to claim 9, wherein: The organic light emitting element generates blue light, The quantum dot thin film layer is formed at a position where the blue light is to be changed into any one of red light and green light.

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