CN111403449B - Display panel and manufacturing method thereof - Google Patents
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- CN111403449B CN111403449B CN202010221290.8A CN202010221290A CN111403449B CN 111403449 B CN111403449 B CN 111403449B CN 202010221290 A CN202010221290 A CN 202010221290A CN 111403449 B CN111403449 B CN 111403449B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 158
- 230000001070 adhesive effect Effects 0.000 claims abstract description 143
- 239000000853 adhesive Substances 0.000 claims abstract description 141
- 239000000758 substrate Substances 0.000 claims abstract description 96
- 239000011345 viscous material Substances 0.000 claims abstract description 10
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 28
- 239000011159 matrix material Substances 0.000 claims description 24
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 23
- 229920002367 Polyisobutene Polymers 0.000 claims description 12
- 229920005549 butyl rubber Polymers 0.000 claims description 12
- 239000004200 microcrystalline wax Substances 0.000 claims description 12
- 235000019808 microcrystalline wax Nutrition 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 9
- 230000006837 decompression Effects 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 14
- 230000003811 curling process Effects 0.000 abstract description 12
- 239000010410 layer Substances 0.000 description 318
- 238000000034 method Methods 0.000 description 14
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- 239000007924 injection Substances 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 229920006037 cross link polymer Polymers 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
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- 238000002788 crimping Methods 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- QXLPXWSKPNOQLE-UHFFFAOYSA-N methylpentynol Chemical compound CCC(C)(O)C#C QXLPXWSKPNOQLE-UHFFFAOYSA-N 0.000 description 2
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Classifications
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
-
- 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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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application discloses a display panel and a manufacturing method thereof. The display panel includes: an array substrate; a pixel defining layer on the array substrate and a light emitting device layer; the pixel defining layer comprises a plurality of first openings and a plurality of second openings, wherein a luminescent material is arranged in the first openings, and the second openings are filled with a viscous material which is used for bonding the luminescent device layer and the array substrate. According to the application, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used for bonding the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal due to the fact that the film layer is separated due to insufficient adhesive force between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
Description
Technical Field
The application relates to the field of display, in particular to a display panel and a manufacturing method thereof.
Background
With the improvement of living standard, active Matrix Organic Light Emitting Diode (AMOLED) is expected to ban liquid crystal as the mainstream choice of next generation display due to the characteristics of high contrast, wide viewing angle, fast response speed, and flexibility.
In the prior art, in the curling process of the display panel, the film layer is separated due to insufficient adhesion between the array substrate and the light-emitting device layer, so that the technical problem of abnormal display of the display panel is caused.
Therefore, a display panel and a method for manufacturing the same are needed to solve the above-mentioned problems.
Disclosure of Invention
The application provides a display panel and a preparation method thereof, which are used for solving the technical problem that when the display panel is in a curling process, the display panel is abnormal due to the separation of a film layer caused by insufficient adhesion between an array substrate and a light-emitting device layer.
In order to solve the problems, the technical scheme provided by the application is as follows:
the present application proposes a display panel comprising:
An array substrate;
a pixel defining layer and a light emitting device layer on the array substrate;
The pixel definition layer comprises a plurality of first openings and a plurality of second openings, wherein the first openings are filled with luminescent materials, the second openings are filled with adhesive materials, and the adhesive materials are used for bonding the luminescent device layer and the array substrate.
In the display panel of the present application, the display panel includes a flat layer between the pixel defining layer and the array substrate;
the second opening penetrates through the pixel defining layer and extends to the flat layer.
In the display panel of the present application, a plurality of first protrusions and/or a plurality of first concavities are provided on a first surface of the adhesive material contacting the light emitting device layer;
the tacky material is nested with the light emitting device layer by a plurality of the first protrusions and/or a plurality of the first concavities on the first surface.
In the display panel of the present application, a plurality of second protrusions and/or a plurality of second concavities are provided on a second surface of the pixel defining layer, which is in contact with the adhesive material;
The adhesive material is nested with the pixel definition layer by a plurality of the second protrusions and/or a plurality of the second concavities on the second surface.
In the display panel of the present application, the adhesive material includes propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, and chloroform.
In the display panel of the present application, the light emitting device layer includes a third opening corresponding to the second opening, the third opening penetrating through the light emitting device layer and extending to the second opening, and the adhesive material is connected to a cathode layer in the light emitting device layer.
In the display panel of the present application, the second opening is disposed in a non-display area of the pixel defining layer.
In the display panel of the present application, the second opening is disposed between any adjacent two black matrixes in the non-display area.
In the display panel of the present application, the organic material includes propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, chloroform, and black dye;
the second via hole and the organic material are used as a black matrix of the non-display area.
The application also provides a manufacturing method of the display panel, which comprises the following steps:
Forming a pixel defining layer on the array substrate;
Forming a plurality of first openings and a plurality of second openings on the pixel defining layer;
Filling an adhesive material in the second opening;
filling a luminescent material in the first opening;
forming a light emitting device layer on the pixel defining layer;
The adhesive material is used for bonding the light-emitting device layer and the array substrate.
The beneficial effects are that: according to the application, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used for bonding the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal due to the fact that the film layer is separated due to insufficient adhesive force between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a display panel according to the present application;
FIG. 2 is a schematic top view of a display panel according to the present application;
FIG. 3 is a schematic view showing a first structure of a display panel according to the present application;
FIG. 4 is a schematic view showing a second structure of a display panel according to the present application;
FIG. 5 is a schematic top view of a third structure of the display panel of the present application;
FIG. 6 is a schematic view showing a fourth structure of a display panel according to the present application;
FIG. 7 is a schematic view showing a fifth structure of a display panel according to the present application;
Fig. 8 is a flowchart illustrating steps of a method for manufacturing a display panel according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
In the prior art, in the curling process of the display panel, the film layer is separated due to insufficient adhesion between the array substrate and the light-emitting device layer, so that the technical problem of abnormal display of the display panel is caused.
Referring to fig. 1 to 7, the present application provides a display panel 100, the display panel 100 includes:
An array substrate 200;
A pixel defining layer 300 on the array substrate 200 and a light emitting device layer 400;
The pixel defining layer 300 includes a plurality of first openings 301 and a plurality of second openings, the first openings 301 are filled with a light emitting material, the second openings are filled with an adhesive material 500, and the adhesive material 500 is used for bonding the light emitting device layer 400 and the array substrate 200.
According to the application, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used for bonding the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal due to the fact that the film layer is separated due to insufficient adhesive force between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
The technical scheme of the present application will now be described with reference to specific embodiments.
Example 1
Referring to fig. 1 to 4, the present application provides a display panel 100, wherein the display panel 100 includes an array substrate 200, a pixel defining layer 300 disposed on the array substrate 200, and a light emitting device layer 400. The pixel defining layer 300 includes a plurality of first openings 301 and a plurality of second openings 302, the first openings 301 are filled with a light emitting material, the second openings 302 are filled with an adhesive material 500, and the adhesive material 500 is used for bonding the light emitting device layer 400 and the array substrate 200. In this embodiment, the array substrate 200 includes a first substrate, a first buffer layer, a second substrate, a second buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer insulating layer, and a source/drain layer 220 in this order.
In this embodiment, the first substrate includes a first substrate, a first buffer layer, a second substrate, a second buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, and an interlayer insulating layer of the array substrate 200.
In this embodiment, the display panel 100 includes a planarization layer 210 between the pixel defining layer 300 and the array substrate 200. The second opening 302 extends through the pixel defining layer 300 and to the planarization layer 210. The greater the depth of the second opening 302, the greater the contact area between the adhesive material 500 in the second opening 302 and the surrounding film layer, and the better the adhesion effect, see fig. 4.
In this embodiment, the depth of the second opening 302 may be through the pixel defining layer 300 and expose the planarization layer 210, and the planarization layer 210 is not etched into the second opening 302, refer to fig. 1.
In this embodiment, the depth of the second opening 302 may be the depth that penetrates the pixel defining layer 300 and includes a portion of the second opening 302 in the planarization layer 210. The second opening 302 does not extend through the planar layer 210. The adhesive material 500 fills the second opening 302, and the contact area between the adhesive material 500 and the surrounding film layer in the second opening 302 is increased, so that the array substrate 200 and the light emitting device layer 400 can be better bonded. Because the source/drain layer 220 is included between the planarization layer 210 and the interlayer insulating layer, if the second opening 302 penetrates the planarization layer 210, the hole is perforated too deeply, which is easy to damage the source/drain layer 220, refer to fig. 1 and fig. 2.
In this embodiment, a plurality of first protrusions 501 and/or a plurality of first concave surfaces 502 are provided on a first surface of the adhesive material 500 contacting the light emitting device layer 400. The adhesive material 500 is nested with the light emitting device layer 400 by the first protrusions 501 and/or the first concavities 502 on the first surface, see fig. 4. The first surface is any surface of the adhesive material 500, so that the contact area between the adhesive material 500 and the light-emitting device layer 400 is increased, the adhesion between the adhesive material 500 and the light-emitting device layer 400 is increased, and the stability between the two layers is improved.
In this embodiment, a plurality of second protrusions 303 and/or a plurality of second concave surfaces 304 are provided on a second surface of the pixel defining layer 300 contacting the adhesive material 500. The adhesive material 500 is nested with the pixel defining layer 300 by the plurality of second protrusions 303 and/or the plurality of second recesses 304 on the second surface, see fig. 3. The second surface is any surface of the pixel defining layer 300, which increases the contact area between the adhesive material 500 and the pixel defining layer 300, increases the adhesion between the adhesive material 500 and the pixel defining layer 300, and improves the stability between the two layers.
In this embodiment, the cross-sectional area of the second opening 302 on the first cross-section gradually increases in a direction away from the array substrate 200. The first section is parallel to the array substrate 200. By gradually increasing the cross-sectional area of the second opening 302 near the light emitting device layer 400 in the first cross-section, the area of the adhesive material 500 contacting the light emitting device layer 400 may be increased, and the array substrate 200 and the light emitting device layer 400 may be better bonded.
In this embodiment, the adhesive material 500 includes propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, and chloroform. The propylene glycol methyl ether acetate is a solvent, and may be used to dissolve other substances in the viscous material 500. The addition of chloroform can better improve the adhesion between the adhesive material 500 and the light emitting device layer 400, and in particular, can enhance the adhesion between the adhesive material 500 and the hollow injection layer in the light emitting device layer 400.
In this embodiment, the adhesive material 500 is added during the preparation process according to the mass fraction of the content: 54% propylene glycol methyl ether acetate, 23% polyisobutylene, 18% butyl rubber, 3% microcrystalline wax, and 2% chloroform. After filling the components in the above proportion into the second opening 302, the solvent of the viscous material 500, that is, the propylene glycol methyl ether acetate may be separated out after drying under reduced pressure, and finally the remaining propylene glycol methyl ether acetate may account for less than 10% of the original mass fraction. This reduces the energy loss and difficulty of the drying process, and appropriately increases the flexibility of the adhesive material 500, thereby better improving the stress when the display panel 100 is distorted.
In this embodiment, the second opening 302 is disposed in the non-display area of the pixel defining layer 300, refer to fig. 2. The second openings 302 are located in the non-display area of the display panel 100, so that the opening ratio of the display panel 100 is not occupied, the non-display area is distributed around the display area, the second openings 302 and the adhesive material 500 are also distributed around the display area, and when the display panel 100 is curled, the stress can be better dispersed, the adhesion is enhanced, and the reliability between the film layers of the display panel 100 is improved.
In this embodiment, the second opening 302 is disposed between any two adjacent black matrixes 310 in the non-display area, referring to fig. 2. The black matrixes 310 are used for shielding non-display devices such as signal lines, and the second openings 302 are arranged between any two adjacent black matrixes 310, so that the non-display device area, the array substrate 200 and the light-emitting device layer 400 can be better bonded tightly, and separation is avoided when the display panel 100 is curled.
In this embodiment, the second opening 302 is disposed between any two adjacent spacers 320 in the non-display area, as shown in fig. 2. The spacers 320 are used for relieving stress when the display panel 100 is pressed, and the second opening 302 is disposed between any two adjacent spacers 320, and the two spacers are matched with each other, so that the non-display device region, the array substrate 200 and the light-emitting device layer 400 can be better bonded tightly, and separation is avoided when the display panel 100 is curled.
In this embodiment, the black matrix 310 is located between any two of the first openings 301, and referring to fig. 2, the black matrix can better play a role in shading light and prevent color mixing of the light-emitting areas.
In this embodiment, the shape of the opening of the second opening 302 in the pixel area may be a closed pattern, including a circle, a rectangle, and a triangle, which is not limited herein. Wherein, due to the characteristic of the circle, the area of the circle is the largest, and when the shape of the opening is circular, referring to fig. 2, the bonding effect is the best.
In this embodiment, the light emitting device layer 400 includes a cathode layer 430, a light emitting material layer 420, and an anode layer 410. The luminescent material layer 420 includes a conductive layer, a luminescent material, and an emissive layer. The conductive layer includes a hole injection layer and a hole transport layer. The emission layer includes an electron transport layer and an electron injection layer.
In this embodiment, when the temperature increases, the adhesive capability of the adhesive material 500 increases, that is, when the display panel 100 is in operation, the temperature of the display panel 100 increases, so that in the normal operating range of the display panel 100, as the operating strength of the display panel 100 increases, the higher the temperature, the stronger the adhesive capability of the adhesive material 500, the better the adhesive effect, and the stronger and less likely the film layers in the display panel 100 to separate.
According to the embodiment, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used for bonding the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal in display due to the fact that the film layer is separated due to insufficient adhesive force between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
Example two
Referring to fig. 1 to 5, the present embodiment is the same as or similar to the first embodiment, except that:
The tacky material 500 includes propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, chloroform, and black dye.
In this embodiment, the second opening 302 and the adhesive material 500 serve as a black matrix of the non-display area. By adding the black dye, the black matrix 310 in the non-display area is replaced by the second opening 302 and the adhesive material 500 added with the black dye, refer to fig. 5 specifically, so that the process of manufacturing the black matrix 310 is reduced, and the adhesive material 500 can not only play a role in shading the original black matrix 310, but also play a role in bonding the array substrate 200 and the light-emitting device layer 400.
In this embodiment, the adhesive material 500 is added in the preparation process according to the mass fraction of the content: 34% of propylene glycol methyl ether acetate, 23% of polyisobutylene, 18% of butyl rubber, 3% of microcrystalline wax, 2% of chloroform and 20% of black dye. After filling the components in the above proportion into the second opening 302, the solvent of the viscous material 500, that is, the propylene glycol methyl ether acetate may be separated out after drying under reduced pressure, and finally the remaining propylene glycol methyl ether acetate may account for less than 10% of the original mass fraction. This reduces the energy loss and difficulty of the drying process, and appropriately increases the flexibility of the adhesive material 500, thereby better improving the stress when the display panel 100 is distorted.
In this example, the 20% black dye may include 10% carbon black, 5% dispersant, 2% crosslinked polymer, and 3% crosslinking monomer. The proportion can ensure that the color of the adhesive material 500 is blacked to achieve the shading effect of the original black matrix 310, and the bonding capability of the adhesive material 500 is not greatly changed.
In this embodiment, the dispersant may include methylpentanol. The crosslinked polymer may include dicumyl peroxide. The crosslinking monomer may include hydroxyethyl methacrylate.
According to the embodiment, the black dye is added into the adhesive material, so that the adhesive material replaces the original black matrix, the process of the black matrix is reduced, the adhesive material can play a role in not only playing a role in shading the original black matrix, but also playing a role in bonding the array substrate and the light-emitting device layer, and the technical problem that the display panel is abnormal in display due to film layer separation caused by insufficient adhesion between the array substrate and the light-emitting device layer in the crimping process of the display panel is avoided.
Example III
Referring to fig. 1 to 7, the present embodiment is the same as or similar to the first or second embodiment, except that:
the light emitting device layer 400 includes a third opening 401 corresponding to the second opening 302, the third opening 401 extending through the light emitting material layer 420 and to the second opening 302.
In this embodiment, the second opening 302 is filled with an adhesive material 500, and the adhesive material 500 is connected to the cathode layer 430 of the light emitting device layer 400, referring to fig. 6. The adhesive material 500 has strong adhesion with the cathode layer 430 of the light emitting device layer 400, so that the pixel defining layer 300 and the cathode layer 430 can be well bonded, and the film layer is not easy to separate when the display panel 100 is curled.
In this embodiment, the second opening 302 and the third opening 401 are filled with an adhesive material 500, and the adhesive material 500 is connected to the cathode layer 430 of the light emitting device layer 400, referring to fig. 7. The adhesive material 500 has strong adhesion with the cathode layer 430 of the light emitting device layer 400, so that the pixel defining layer 300 and the cathode layer 430 can be well bonded, the adhesive material 500 has a certain elasticity, and the adhesive material 500 in the second opening 302 and the third opening 401 can bond each film layer of the light emitting device layer 400 and also can serve as a limiting device of the light emitting device layer 400, prevent the film layers from being separated when the display panel 100 is curled, and avoid dislocation movement between the film layers.
In this embodiment, the second opening 302 and the third opening 401 are not filled with the adhesive material 500. The pixel defining layer 300 is connected to the cathode layer 430 of the light emitting device layer 400, and the adhesion between the pixel defining layer 300 and the cathode layer 430 of the light emitting device layer 400 is sufficient to relieve stress between the film layers when the display panel 100 is curled.
In this embodiment, the planarization layer 210 includes a plurality of fourth openings 211, and the fourth openings 211 penetrate through the planarization layer 210 and extend to the source/drain layer 220 of the array substrate 200. The anode layer 410 is electrically connected to the source/drain layer 220 through the fourth opening 211, refer to fig. 1. The source/drain electrode layer 220 is electrically connected to the active layer 230.
In the embodiment, the light-emitting device layer is patterned, the adhesive material is directly connected with the cathode layer, and the strong adhesion between the adhesive material and the cathode layer is utilized, so that separation between film layers is avoided when the display panel is curled, and user experience is improved.
In the first to third embodiments, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used to bond the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal in display due to the fact that the film layer is separated due to insufficient adhesion between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
Referring to fig. 8, the present application further provides a method for manufacturing the display panel 100, which includes:
s10, forming a pixel definition layer 300 on the array substrate 200;
s20, forming a plurality of first openings 301 and a plurality of second openings 302 on the pixel defining layer 300;
s30, filling an adhesive material 500 in the second opening 302;
s40, filling luminescent materials in the first opening 301;
S50, forming a light emitting device layer 400 on the pixel defining layer 300;
s60, wherein the adhesive material 500 is used to bond the light emitting device layer 400 and the array substrate 200.
According to the application, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used for bonding the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal due to the fact that the film layer is separated due to insufficient adhesive force between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
The technical scheme of the present application will now be described with reference to specific embodiments.
Example IV
S10, a pixel defining layer 300 is formed on the array substrate 200.
In this embodiment, the steps before S10 further include:
S01, a planarization layer 210 is formed on the array substrate 200, and a plurality of fourth openings 211 are formed on the planarization layer 210, where the fourth openings 211 penetrate through the planarization layer 210 and extend to the source/drain layer 220 of the array substrate 200, refer to fig. 1.
In this embodiment, the forming step of the array substrate 200 includes sequentially forming a first buffer layer, a second substrate, a second buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer insulating layer, and a source/drain layer 220 on a first substrate.
S02, forming an anode layer 410 of the light emitting device layer 400 on the pixel defining layer 300, the anode layer 410 being electrically connected to the array substrate 200 through the fourth opening 211.
In this embodiment, the anode layer 410 is electrically connected to the source/drain layer 220 through the fourth opening 211, refer to fig. 1.
In this embodiment, the first substrate includes a first substrate, a first buffer layer, a second substrate, a second buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, and an interlayer insulating layer of the array substrate 200.
S20, a plurality of first openings 301 and a plurality of second openings 302 are formed on the pixel defining layer 300.
In this embodiment, before step S20, the method further includes:
s198, a plurality of fifth openings and a plurality of sixth openings are formed on the pixel defining layer 300.
S199, a black matrix 310 is formed in the fifth opening and a spacer 320 is formed in the sixth opening, refer to fig. 2.
In this embodiment, the array substrate 200 includes a planarization layer 210 near one side of the pixel defining layer 300. The second opening 302 extends through the pixel defining layer 300 and to the planarization layer 210, see fig. 4. The greater the depth of the second opening 302, the greater the contact area of the adhesive material 500 within the second opening 302 with the surrounding film layer, and the better the adhesion.
In this embodiment, the depth of the second opening 302 may be through the pixel defining layer 300 and expose the planarization layer 210, and referring to fig. 1, the planarization layer 210 is not etched into the second opening 302.
In this embodiment, the depth of the second opening 302 may be the depth that penetrates the pixel defining layer 300 and includes a portion of the second opening 302 in the planarization layer 210. The second opening 302 does not penetrate the planarization layer 210, see fig. 4. The adhesive material 500 fills the second opening 302, and the contact area between the adhesive material 500 and the surrounding film layer in the second opening 302 is increased, so that the array substrate 200 and the light emitting device layer 400 can be better bonded. Since the source/drain layer 220 is included between the planarization layer 210 and the interlayer insulating layer, if the second opening 302 penetrates the planarization layer 210, the punching depth is too deep, which is liable to damage the source/drain layer 220.
In this embodiment, a plurality of first protrusions 501 and/or a plurality of first concave surfaces 502 are provided on a first surface of the adhesive material 500 contacting the light emitting device layer 400. The tacky material 500 is nested with the light emitting device layer 400 by the plurality of first protrusions 501 and/or the plurality of first concavities 502 on the first surface. Referring to fig. 4, the first surface is any surface of the adhesive material 500, which increases the contact area between the adhesive material 500 and the light-emitting device layer 400, increases the adhesion between the adhesive material 500 and the light-emitting device layer 400, and improves the stability between the two layers.
In this embodiment, a plurality of second protrusions 303 and/or a plurality of second concave surfaces 304 are provided on a second surface of the pixel defining layer 300 contacting the adhesive material 500. The viscous material 500 is nested with the pixel defining layer 300 by the plurality of second protrusions 303 and/or the plurality of second recesses 304 on the second surface. The second surface is any surface of the pixel defining layer 300, referring to fig. 3, to increase the contact area between the adhesive material 500 and the pixel defining layer 300, increase the adhesion between the adhesive material 500 and the pixel defining layer 300, and improve the stability between the two layers.
In this embodiment, the cross-sectional area of the second opening 302 on the first cross-section gradually increases in a direction away from the array substrate 200. The first section is parallel to the array substrate 200. By gradually increasing the cross-sectional area of the second opening 302 near the light emitting device layer 400 in the first cross-section, the area of the adhesive material 500 contacting the light emitting device layer 400 may be increased, and the array substrate 200 and the light emitting device layer 400 may be better bonded.
In this embodiment, the second opening 302 is disposed in the non-display area of the pixel defining layer 300, refer to fig. 2. The second openings 302 are located in the non-display area of the display panel 100, so that the opening ratio of the display panel 100 is not occupied, the non-display area is distributed around the display area, the second openings 302 and the adhesive material 500 are also distributed around the display area, and when the display panel 100 is curled, the stress can be better dispersed, the adhesion is enhanced, and the reliability between the film layers of the display panel 100 is improved.
In this embodiment, the second opening 302 is disposed between any two adjacent black matrixes 310 in the non-display area, referring to fig. 2. The black matrixes 310 are used for shielding non-display devices such as signal lines, and the second openings 302 are arranged between any two adjacent black matrixes 310, so that the non-display device area, the array substrate 200 and the light-emitting device layer 400 can be better bonded tightly, and separation is avoided when the display panel 100 is curled.
In this embodiment, the second opening 302 is disposed between any two adjacent spacers 320 in the non-display area, as shown in fig. 2. The spacers 320 are used for relieving stress when the display panel 100 is pressed, and the second opening 302 is disposed between any two adjacent spacers 320, and the two spacers are matched with each other, so that the non-display device region, the array substrate 200 and the light-emitting device layer 400 can be better bonded tightly, and separation is avoided when the display panel 100 is curled.
In this embodiment, the black matrix 310 is located between any two of the first openings 301, and referring to fig. 2, the black matrix can better play a role in shading light and prevent color mixing of the light-emitting areas.
In this embodiment, the shape of the opening of the second opening 302 in the pixel area may be a closed pattern, including a circle, a rectangle, and a triangle, which is not limited herein. Wherein, due to the characteristic of the circle, the area of the circle is the largest, and when the shape of the opening is circular, referring to fig. 2, the bonding effect is the best.
And S30, filling the second opening 302 with an adhesive material 500.
In this embodiment, the adhesive material 500 includes propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, and chloroform. The propylene glycol methyl ether acetate is a solvent, and may be used to dissolve other substances in the viscous material 500. The addition of chloroform can better improve the adhesion between the adhesive material 500 and the light emitting device layer 400, and in particular, can enhance the adhesion between the adhesive material 500 and the hollow injection layer in the light emitting device layer 400.
In this embodiment, the adhesive material 500 is added during the preparation process according to the mass fraction of the content: 54% propylene glycol methyl ether acetate, 23% polyisobutylene, 18% butyl rubber, 3% microcrystalline wax, and 2% chloroform. After filling the components in the above proportion into the second opening 302, the solvent of the viscous material 500, that is, the propylene glycol methyl ether acetate may be separated out after drying under reduced pressure, and finally the remaining propylene glycol methyl ether acetate may account for less than 10% of the original mass fraction. This reduces the energy loss and difficulty of the drying process, and appropriately increases the flexibility of the adhesive material 500, thereby better improving the stress when the display panel 100 is distorted.
In this embodiment, when the temperature increases, the adhesive capability of the adhesive material 500 increases, that is, when the display panel 100 is in operation, the temperature of the display panel 100 increases, so that in the normal operating range of the display panel 100, as the operating strength of the display panel 100 increases, the higher the temperature, the stronger the adhesive capability of the adhesive material 500, the better the adhesive effect, and the stronger and less likely the film layers in the display panel 100 to separate.
S40, filling the first opening 301 with a luminescent material.
In this embodiment, step S40 includes:
S41, a conductive layer of the light emitting device layer 400 is formed on the pixel electrode layer.
In this embodiment, the conductive layer includes a hole injection layer and a hole transport layer.
S42, filling the first opening 301 with a luminescent material.
The luminescent material is an organic molecule or an organic polymer.
S50, a light emitting device layer 400 is formed on the pixel defining layer 300.
In this embodiment, step S50 includes:
S51, an emission layer of the light emitting device layer 400 is formed on the pixel defining layer 300.
In this embodiment, the emission layer includes an electron transport layer and an electron injection layer.
In this embodiment, the light emitting material layer 420 of the light emitting device layer 400 includes the conductive layer, the light emitting material, and the emission layer.
S52, a cathode layer 430 is formed on the pixel defining layer 300, please refer to fig. 1.
S60, wherein the adhesive material 500 is used to bond the light emitting device layer 400 and the array substrate 200.
According to the embodiment, the adhesive material is filled between the array substrate and the light-emitting device layer, the adhesive material is used for bonding the array substrate and the light-emitting device layer, and the technical problem that the display panel is abnormal in display due to the fact that the film layer is separated due to insufficient adhesive force between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
Example five
The present embodiment is the same as or similar to the fourth embodiment, except that:
The tacky material 500 includes propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, chloroform, and black dye.
In this embodiment, in step S198, a plurality of second openings 302 and a plurality of sixth openings are formed on the pixel defining layer 300. S199, a black matrix 310 is formed in the second opening 302 and a spacer 320 is formed in the sixth opening, refer to fig. 5.
In this embodiment, the second opening 302 and the adhesive material 500 are used as the black matrix 310 of the non-display area, referring to fig. 5. By adding the black dye, the black matrix 310 of the non-display area is replaced by the adhesive material 500 added with the black dye, so that the process of manufacturing the black matrix 310 is reduced, and the adhesive material 500 can not only play a role in shading the original black matrix 310, but also play a role in bonding the array substrate 200 and the light-emitting device layer 400.
In this embodiment, the adhesive material 500 is added in the preparation process according to the mass fraction of the content: 34% of propylene glycol methyl ether acetate, 23% of polyisobutylene, 18% of butyl rubber, 3% of microcrystalline wax, 2% of chloroform and 20% of black dye. After filling the components in the above proportion into the second opening 302, the solvent of the viscous material 500, that is, the propylene glycol methyl ether acetate may be separated out after drying under reduced pressure, and finally the remaining propylene glycol methyl ether acetate may account for less than 10% of the original mass fraction. This reduces the energy loss and difficulty of the drying process, and appropriately increases the flexibility of the adhesive material 500, thereby better improving the stress when the display panel 100 is distorted.
In this example, the 20% black dye may include 10% carbon black, 5% dispersant, 2% crosslinked polymer, and 3% crosslinking monomer. The proportion can ensure that the color of the adhesive material 500 is blacked to achieve the shading effect of the original black matrix 310, and the bonding capability of the adhesive material 500 is not greatly changed.
In this embodiment, the dispersant may include methylpentanol. The crosslinked polymer may include dicumyl peroxide. The crosslinking monomer may include hydroxyethyl methacrylate.
According to the embodiment, the black dye is added into the adhesive material, so that the adhesive material replaces the original black matrix, the process of the black matrix is reduced, the adhesive material can play a role in not only playing a role in shading the original black matrix, but also playing a role in bonding the array substrate and the light-emitting device layer, and the technical problem that the display panel is abnormal in display due to film layer separation caused by insufficient adhesion between the array substrate and the light-emitting device layer in the crimping process of the display panel is avoided.
Example six
The present embodiment is the same as or similar to the fourth or fifth embodiment, except that:
referring to fig. 6 and 7, after step S51, the method further includes:
s511, forming a third opening 401 on the luminescent material layer 420, wherein the third opening 401 penetrates the luminescent material layer 420 and extends to the second opening 302.
The light emitting material layer 420 of the light emitting device layer 400 includes a third opening 401 corresponding to the second opening 302, the third opening 401 extending through the light emitting material layer 420 and to the second opening 302.
In this embodiment, the second opening 302 is filled with an adhesive material 500, and the adhesive material 500 is connected to the cathode layer 430 of the light emitting device layer 400, referring to fig. 6. The adhesive material 500 has strong adhesion with the cathode layer 430 of the light emitting device layer 400, so that the pixel defining layer 300 and the cathode layer 430 can be well bonded, and the film layer is not easy to separate when the display panel 100 is curled.
In this embodiment, after step S511, the method further includes:
S512, filling the third opening 401 with the adhesive material 500, where the adhesive material 500 is connected to the cathode layer 430 of the light emitting device layer 400, referring specifically to fig. 7.
In this embodiment, the adhesive material 500 has strong adhesion with the cathode layer 430 of the light emitting device layer 400, so that the pixel defining layer 300 and the cathode layer 430 can be well bonded, the adhesive material 500 has a certain elasticity, and referring to fig. 7 specifically, the adhesive material 500 in the second opening 302 and the third opening 401 can bond each film layer of the light emitting device layer 400, and can also serve as a limiting device of the light emitting device layer 400, so as to prevent the separation of the film layers when the display panel 100 is curled, and avoid the dislocation movement between the film layers.
In this embodiment, step S30 is deleted, and the second opening 302 and the third opening 401 are not filled with the adhesive material 500. The pixel defining layer 300 is connected to the cathode layer 430 of the light emitting device layer 400, and the adhesion between the pixel defining layer 300 and the cathode layer 430 of the light emitting device layer 400 is sufficient to relieve stress between the film layers when the display panel 100 is curled.
In the embodiment, the light-emitting device layer is patterned, the adhesive material is directly connected with the cathode layer, and the strong adhesion between the adhesive material and the cathode layer is utilized, so that separation between film layers is avoided when the display panel is curled, and user experience is improved.
In the fourth to sixth embodiments, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used to bond the array substrate and the light-emitting device layer, so that the technical problem that the display panel is abnormal in display due to the fact that the film layer is separated due to insufficient adhesion between the array substrate and the light-emitting device layer in the curling process of the display panel is avoided.
The application discloses a display panel and a manufacturing method thereof. The display panel includes: an array substrate; a pixel defining layer on the array substrate and a light emitting device layer; the pixel defining layer comprises a plurality of first openings and a plurality of second openings, wherein a luminescent material is arranged in the first openings, and the second openings are filled with a viscous material which is used for bonding the luminescent device layer and the array substrate. According to the application, the adhesive material is filled between the array substrate and the light-emitting device layer, and the adhesive material is used for bonding the array substrate and the light-emitting device layer, so that the technical problems of film separation and abnormal display of the display panel caused by insufficient adhesion between the array substrate and the light-emitting device layer in the curling process of the display panel are avoided.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has described in detail embodiments of the present application, and specific examples have been employed herein to illustrate the principles and embodiments of the present application, the above description of the embodiments being only for the purpose of aiding in the understanding of the technical solution and core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. A display panel, the display panel comprising:
An array substrate;
a pixel defining layer and a light emitting device layer on the array substrate;
The pixel definition layer comprises a plurality of first openings and a plurality of second openings, wherein the first openings are filled with luminescent materials, the second openings are filled with adhesive materials, and the adhesive materials are used for bonding the luminescent device layer and the array substrate;
wherein a plurality of first protrusions and/or a plurality of first concavities are provided on a first surface of the adhesive material contacting the light emitting device layer;
The adhesive material is nested with the light emitting device layer by a plurality of the first protrusions and/or a plurality of the first concavities on the first surface;
a plurality of second protrusions and/or a plurality of second concave surfaces are arranged on a second surface of the pixel defining layer, which is contacted with the adhesive material;
the adhesive material is nested with the pixel definition layer by a plurality of the second protrusions and/or a plurality of the second concavities on the second surface;
and the viscous material comprises propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax and chloroform; or the adhesive material comprises propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, chloroform, and black dye; after decompression drying and precipitation, the mass fraction of the propylene glycol methyl ether acetate in the adhesive material is less than 10%, and when the temperature is increased, the adhesive capability of the adhesive material is enhanced.
2. The display panel of claim 1, wherein the display panel comprises a planar layer between the pixel defining layer and the array substrate;
the second opening penetrates through the pixel defining layer and extends to the flat layer.
3. The display panel of claim 1, wherein the light-emitting device layer includes a third opening corresponding to the second opening, the third opening extending through the light-emitting device layer and extending to the second opening, the adhesive material being connected to a cathode layer in the light-emitting device layer.
4. The display panel of claim 1, wherein the second opening is disposed in a non-display region of the pixel defining layer.
5. The display panel of claim 4, wherein the second opening is disposed between any adjacent two of the black matrices within the non-display region.
6. The display panel of claim 4, wherein the second opening and the adhesive material act as a black matrix for the non-display area.
7. A method of manufacturing a display panel as claimed in any one of claims 1 to 6, comprising:
Forming a pixel defining layer on the array substrate;
Forming a plurality of first openings and a plurality of second openings on the pixel defining layer;
Filling an adhesive material in the second opening;
filling a luminescent material in the first opening;
forming a light emitting device layer on the pixel defining layer;
The adhesive material is used for bonding the light-emitting device layer and the array substrate.
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| CN111509015A (en) * | 2020-04-27 | 2020-08-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN112531000B (en) * | 2020-12-02 | 2022-12-09 | 深圳市中优图科技有限公司 | OLED display panel and manufacturing method thereof |
| CN113487965B (en) * | 2021-06-22 | 2022-12-23 | 武汉华星光电半导体显示技术有限公司 | Support member, manufacturing method thereof and display module |
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