CN111668283A - Display panel and manufacturing method thereof - Google Patents
Display panel and manufacturing method thereof Download PDFInfo
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- CN111668283A CN111668283A CN202010633998.4A CN202010633998A CN111668283A CN 111668283 A CN111668283 A CN 111668283A CN 202010633998 A CN202010633998 A CN 202010633998A CN 111668283 A CN111668283 A CN 111668283A
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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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
- H10K59/1201—Manufacture or treatment
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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
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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
- H10K59/126—Shielding, e.g. light-blocking means over the TFTs
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Abstract
The application discloses a display panel and a manufacturing method thereof. The display panel comprises an array substrate, an anode layer positioned on the array substrate, a shading layer positioned on the anode layer and a cathode layer positioned on the shading layer; the shading layer comprises a plurality of first shading units and a plurality of second shading units, the first shading units and the second shading units are vertically arranged, and the second shading units are positioned between two adjacent first shading units; two adjacent second shading units and two adjacent first shading units form an opening, the anode layer is exposed by the opening, and the opening is filled with a light-emitting unit; the thickness of the second shading unit is smaller than that of the first shading unit, and the thickness of the second shading unit is larger than or equal to that of the light emitting unit. The shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
Description
Technical Field
The application relates to the field of display, in particular to the field of display technology, and specifically relates to a display panel and a manufacturing method thereof.
Background
With the improvement of living standard, a large-sized display screen is increasingly popular in life. An OLED (organic light-Emitting Diode) display screen is widely used in a large-sized display screen due to its high display color.
In the prior art, a large-size OLED display screen often adopts an inkjet printing method to form a luminescent material, and when a pixel definition layer is formed, because the pixel definition layer is often made of an organic material with high transmittance, and a light shielding layer is not arranged between two adjacent luminescent units with different colors, light of different colors is mixed, and the display effect is poor.
Therefore, a display panel and a method for fabricating the same are needed to solve the above-mentioned problems.
Disclosure of Invention
The application provides a display panel and a manufacturing method thereof, and aims to solve the technical problems that in the prior art, a large-size OLED display screen often adopts an ink-jet printing mode to form a luminescent material, when a pixel definition layer is formed, because the material of the pixel definition layer often adopts an organic material with higher transmittance, and a light shielding layer is not arranged between two adjacent luminescent units with different colors, so that the light mixing of different colors is caused, and the display effect is poor.
In order to solve the above problems, the technical solution provided by the present application is as follows:
a display panel comprises an array substrate, an anode layer positioned on the array substrate, a shading layer positioned on the anode layer, and a cathode layer positioned on the shading layer;
the light shielding layer comprises a plurality of first light shielding units and a plurality of second light shielding units, the first light shielding units and the second light shielding units are vertically arranged, and the second light shielding units are positioned between two adjacent first light shielding units;
two adjacent second shading units and two adjacent first shading units form an opening, the anode layer is exposed through the opening, and a light emitting unit is filled in the opening;
the thickness of the second shading unit is smaller than that of the first shading unit, and the thickness of the second shading unit is larger than or equal to that of the light emitting unit.
In the display panel of the present application, a difference between a thickness of the first light shielding unit and a thickness of the second light emitting unit is greater than 0.6 μm.
In the display panel of the present application, the display panel further includes a filling unit located on the second light shielding unit, and a sum of a thickness of the filling unit and a thickness of the second light shielding unit is equal to a thickness of the first light shielding unit.
In the display panel of the present application, the material of the filling unit includes a light shielding material, a metal material, and a material of the cathode layer.
In the display panel of the present application, a cross-sectional area of the first light shielding unit and/or the second light shielding unit in a first cross-section is gradually increased in a direction away from the array substrate, and the first cross-section is parallel to the display panel.
In the display panel of the present application, the opening area of the opening includes a first opening area, a second opening area, and a third opening area;
the light-emitting units filled in the openings corresponding to the first opening area generate blue color light;
wherein the first opening area is larger than the second opening area and the third opening area.
In the display panel of the present application, the first light shielding unit and/or the second light shielding unit are provided with a protruding unit near an edge region of the light emitting unit.
The application also provides a manufacturing method of the display panel, which comprises the following steps:
forming an anode layer on the array substrate;
forming a shading material film layer on the anode layer;
forming a light shielding layer comprising a plurality of first light shielding units and a plurality of second light shielding units on the light shielding material film layer by using a half-tone photomask, wherein openings are formed between two adjacent second light shielding units and two adjacent first light shielding units, the first light shielding units and the second light shielding units are vertically arranged, and the second light shielding units are positioned between two adjacent first light shielding units;
filling a light emitting unit in the opening;
forming a cathode layer on the light-shielding layer to form a display panel;
the thickness of the second shading unit is smaller than that of the first shading unit, and the thickness of the second shading unit is larger than or equal to that of the light emitting unit.
In the method for manufacturing the display panel, in a direction away from the array substrate, a sectional area of the first light shielding unit and/or the second light shielding unit in a first section is gradually increased, and the first section is parallel to the display panel.
In the method for manufacturing a display panel of the present application, the opening area of the opening includes a first opening area, a second opening area, and a third opening area;
the light emitting units filled in the openings corresponding to the first opening area generate blue color light, and the first opening area is larger than the second opening area and the third opening area.
Has the advantages that: the shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic view of a first structure of a display panel according to the present application;
FIG. 2 is a schematic top view of a portion of a first structure of a display panel according to the present application;
FIG. 3 is a schematic view of a first structure of a display panel according to the present invention;
FIG. 4 is a second structural diagram of a display panel according to the present application;
FIG. 5 is a schematic view of a third structure of a display panel according to the present application;
FIG. 6 is a schematic top view of a portion of a fourth structure of a display panel according to the present application;
fig. 7 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 drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to 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," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation 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 disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In the prior art, a large-size OLED display screen often adopts an inkjet printing method to form a luminescent material, and when a pixel definition layer is formed, because the pixel definition layer is often made of an organic material with high transmittance, and a light shielding layer is not arranged between two adjacent luminescent units with different colors, light of different colors is mixed, and the display effect is poor.
Referring to fig. 1 to 6, the present application provides a display panel 100, including an array substrate 200, an anode layer 300 on the array substrate 200, a light-shielding layer 400 on the anode layer 300, and a cathode layer 500 on the light-shielding layer 400;
the light shielding layer 400 includes a plurality of first light shielding units 410 and a plurality of second light shielding units 420, the first light shielding units 410 are perpendicular to the second light shielding units 420, and the second light shielding units 420 are located between two adjacent first light shielding units 410;
an opening 700 is formed by two adjacent second light-shielding units 420 and two adjacent first light-shielding units 410, the anode layer 300 is exposed by the opening 700, and the opening 700 is filled with the light-emitting unit 600;
the thickness of the second light shielding unit 420 is smaller than that of the first light shielding unit 410, and the thickness of the second light shielding unit 420 is greater than or equal to that of the light emitting unit 600.
The shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
The technical solution of the present application will now be described with reference to specific embodiments.
Referring to fig. 1 to 6, the display panel 100 includes an array substrate 200, an anode layer 300 on the array substrate 200, a light-shielding layer 400 on the anode layer 300, and a cathode layer 500 on the light-shielding layer 400. The light shielding layer 400 includes a plurality of first light shielding units 410 and a plurality of second light shielding units 420, the first light shielding units 410 are perpendicular to the second light shielding units 420, and the second light shielding units 420 are located between two adjacent first light shielding units 410. An opening 700 is formed by two adjacent second light-shielding units 420 and two adjacent first light-shielding units 410, the anode layer 300 is exposed by the opening 700, and the opening 700 is filled with the light-emitting unit 600. The thickness of the second light shielding unit 420 is smaller than that of the first light shielding unit 410, and the thickness of the second light shielding unit 420 is greater than or equal to that of the light emitting unit 600.
In this embodiment, the first light shielding unit 410 and the second light shielding unit 420 form a pixel defining layer, and the opening 700 is filled with the light emitting unit 600 to enable the display area of the display panel 100 to display normally.
In this embodiment, the light emitting unit 600 emits light with any one of red, green and blue colors, and specifically refer to fig. 2, where R in fig. 2 represents a red light emitting unit, G represents a green light emitting unit, and B represents a blue light emitting unit.
In this embodiment, the material of the light-shielding layer 400 includes a black light-shielding material, and the black light-shielding material includes an organic material, such as a photoresist, and the like, which is not limited herein.
In this embodiment, the black light-shielding material includes an organic material to which carbon black and/or titanium black is added, and the light-shielding material makes an OD value (light transmittance value) of the pixel defining layer larger than 3.
In this embodiment, the difference between the thickness of the first light shielding unit 410 and the thickness of the second light emitting unit 600 is greater than 0.6 μm. The first light shielding unit 410 has a thickness of 0.9 to 1.1 μm, and the second light shielding unit 420 has a thickness of 0.2 to 0.3 μm. The first light shielding unit 410 makes the light emitting units 600 of different colors be spaced apart. The second light shielding units 420 between two adjacent first light shielding units 410 are spaced apart from each other to form the light emitting units 600 of the same color. When the second light-shielding units 420 distinguish different light-emitting units 600, that is, sub-pixels with the same color, and when the light-emitting materials are printed by ink jet, the light-emitting materials with the same color can flow on the second light-shielding units 420 between two adjacent first light-shielding units 410, so that the light-emitting materials with the same color are uniformly distributed. Although the light emitting units 600 with the same color do not involve the problem of color mixing, the second light shielding unit 420 can prevent the brightness from mixing and improve the display effect.
In this embodiment, the display panel 100 further includes a filling unit 440 located on the second light shielding unit 420, and a sum of a thickness of the filling unit 440 and a thickness of the second light shielding unit 420 is equal to a thickness of the first light shielding unit 410, as shown in fig. 1. The filling unit 440 can serve to planarize the light-shielding layer 400, i.e., the pixel defining layer. When the filling unit 440 of the other cover is a light shielding material, the filling unit 440 may prevent color mixing. When the filling unit 440 is made of a metal material, the filling unit 440 can enhance the utilization rate of the color light by utilizing the light reflection property of the metal. When the filling unit 440 is made of the cathode layer 500, the filling unit 440 may utilize the characteristic that the cathode layer 500 is made of a transparent material, and does not affect the light transmittance.
In this embodiment, in a direction away from the array substrate 200, a cross-sectional area of the first light shielding unit 410 and/or the second light shielding unit 420 in a first cross-section is gradually increased, and the first cross-section is parallel to the display panel 100, please refer to fig. 4 specifically. The openings 700 formed by two adjacent second light-shielding units 420 and two adjacent first light-shielding units 410 are small in opening and large in bottom, so that color mixing of light with different colors can be further prevented, and the display effect is improved.
In this embodiment, the opening area of the opening 700 includes a first opening area, a second opening area, and a third opening area. The light emitting unit 600 filled in the opening 700 corresponding to the first opening area generates blue light. Wherein the first opening area is larger than the second opening area and the third opening area. The light emitting unit 600 filled in the opening 700 emits light of any one of red, green and blue, please refer to fig. 6 specifically. The third opening area may be equal to the second opening area. Since the human eye is sensitive to red and green light and not to blue light, the filling area of the blue light emitting unit 600 is increased, that is, the light emitting unit capable of emitting blue light is filled in the opening corresponding to the first opening area, which is shown as the first opening 710. The opening corresponding to the second opening area is filled with a light emitting unit capable of emitting green light, which is shown as a second opening 720. The opening corresponding to the area of the third opening is filled with a light emitting unit capable of emitting red light, which corresponds to the third opening 730 in the figure. The light emitting unit 600 of green and red light can achieve the purpose of sensitively adjusting the pixel point by a smaller light emitting area.
In this embodiment, the area ratio of the first opening area to the second opening area is 2: 1. The area ratio of the first opening area to the third opening area is 2: 1. That is, two light emitting units 600 of red color light and two light emitting units 600 of green color light correspond to one light emitting unit 600 of blue color light. The method just forms a rectangular pixel array, so that the color change of the pixels is better adjusted, the color is more accurately displayed, and the display effect is improved.
In this embodiment, the light emitting units 600 filled in the openings 700 in two adjacent first light shielding units 410 have the same light emitting color, specifically refer to fig. 2 and 6, where R in fig. 2 and 6 represents a red light emitting unit, G represents a green light emitting unit, and B represents a blue light emitting unit. When the luminescent materials are ink-jet printed, the luminescent materials of the same color can flow on the second light shielding unit 420 between two adjacent first light shielding units 410, so that the luminescent materials of the same color are uniformly distributed. Although the light emitting units 600 with the same color do not involve the problem of color mixing, the second light shielding unit 420 can prevent the brightness from mixing and improve the display effect.
In this embodiment, a protruding unit 430 is disposed at an edge of the first light shielding unit 410 and/or the second light shielding unit 420 near the light emitting unit 600, please refer to fig. 5 specifically. The material of the protruding units 430 is the same as that of the light-shielding layer 400, and the protruding units can be manufactured together with the light-shielding layer 400 through a photomask, so that the color mixing of light with different colors can be further prevented, and the display effect can be improved.
In this embodiment, the protruding unit 430 is perpendicular to the display panel 100. The color mixing phenomenon can be avoided to the maximum extent.
In this embodiment, the protruding units 430 and the display panel 100 are disposed non-perpendicularly. The thickness of the display panel 100 is reduced while ensuring avoidance of color mixing. When the protruding unit 430 is disposed parallel to the display panel 100, the light emitting area of the light emitting unit 600 is reduced.
In this embodiment, the anode layer 300 includes a plurality of anodes 310, the openings 700 expose the anodes 310, and the light shielding layer 400 adjacent to the openings 700 overlapsReferring to fig. 3, the first light shielding unit 410 is illustrated in fig. 3 as an example, on the anode 310. The anode 310 can be better fixed, facilitating the positioning of the light emitting unit 600 installation area. Wherein (a) of FIG. 3 is a line a in FIG. 21a2Fig. 3 (b) is a view taken along b in fig. 21b2Schematic view of a partial structure of (1).
The shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
Referring to fig. 1 to 7, the present application further discloses a method for manufacturing a display panel 100, including:
s100, forming an anode layer 300 on the array substrate 200;
s200, forming a shading material film layer on the anode layer 300;
s300, forming a light shielding layer 400 including a plurality of first light shielding units 410 and a plurality of second light shielding units 420 on the light shielding material film by using a halftone mask 800, forming openings 700 between two adjacent second light shielding units 420 and two adjacent first light shielding units 410, wherein the first light shielding units 410 and the second light shielding units 420 are vertically arranged, and the second light shielding units 420 are located between two adjacent first light shielding units 410;
s400, filling the opening 700 with a light emitting unit 600;
s500, forming a cathode layer 500 on the light-shielding layer 400 to form the display panel 100;
the thickness of the second light shielding unit 420 is smaller than that of the first light shielding unit 410, and the thickness of the second light shielding unit 420 is greater than or equal to that of the light emitting unit 600.
The shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
The technical solution of the present application will now be described with reference to specific embodiments.
Referring to fig. 1 to 7, the method for manufacturing the display panel 100 includes:
s100, an anode layer 300 is formed on the array substrate 200.
In this embodiment, step S100 includes:
s110, forming a plurality of first openings on the array substrate 200, wherein the first openings expose the thin film transistor units of the array substrate 200.
And S110, forming an electrode material film on the array substrate 200, wherein the electrode material film is electrically connected with the thin film transistor unit.
And S120, patterning the electrode material thin film to form a plurality of anodes 310 so as to form the anode layer 300.
S200, forming a light-shielding material film on the anode layer 300.
S300, forming a light shielding layer 400 including a plurality of first light shielding units 410 and a plurality of second light shielding units 420 on the light shielding material film by using a halftone mask 800, forming an opening 700 between two adjacent second light shielding units 420 and two adjacent first light shielding units 410, wherein the first light shielding units 410 and the second light shielding units 420 are vertically arranged, and the second light shielding units 420 are located between two adjacent first light shielding units 410.
In this embodiment, the anode layer 300 includes a plurality of anodes 310, the openings 700 expose the anodes 310, and the light shielding layer 400 near the openings 700 is overlapped on the anodes 310, specifically referring to fig. 3, in which the first light shielding unit 410 is taken as an example in fig. 3. The anode 310 can be better fixed, facilitating the positioning of the light emitting unit 600 installation area. Wherein (a) of FIG. 3 is a line a in FIG. 21a2Fig. 3 (b) is a view taken along b in fig. 21b2Schematic view of a partial structure of (1).
In this embodiment, the first light shielding unit 410 and the second light shielding unit 420 form a pixel defining layer, and the opening 700 is filled with the light emitting unit 600 to enable the display area of the display panel 100 to display normally.
In this embodiment, the material of the light-shielding layer 400 includes a black light-shielding material, and the black light-shielding material includes an organic material, such as a photoresist, and the like, which is not limited herein.
In this embodiment, the black light-shielding material includes an organic material to which carbon black and/or titanium black is added, and the light-shielding material makes an OD value (light transmittance value) of the pixel defining layer larger than 3.
In this embodiment, the difference between the thickness of the first light shielding unit 410 and the thickness of the second light emitting unit 600 is greater than 0.6 μm. The first light shielding unit 410 has a thickness of 0.9 to 1.1 μm, and the second light shielding unit 420 has a thickness of 0.2 to 0.3 μm. The first light shielding unit 410 makes the light emitting units 600 of different colors be spaced apart. The second light shielding units 420 between two adjacent first light shielding units 410 are spaced apart from each other to form the light emitting units 600 of the same color. The second light-shielding unit 420 can distinguish different light-emitting units 600, that is, sub-pixels with the same color, and at the same time, when the light-emitting materials are printed by ink jet, the light-emitting materials with the same color can flow on the second light-shielding unit 420 between two adjacent first light-shielding units 410, so that the light-emitting materials with the same color are uniformly distributed, specifically, refer to fig. 2 and fig. 6, where R in fig. 2 and fig. 6 represents a red light-emitting unit, G represents a green light-emitting unit, and B represents a blue light-emitting unit. Although the light emitting units 600 with the same color do not involve the problem of color mixing, the second light shielding unit 420 can prevent the brightness from mixing and improve the display effect.
In this embodiment, the transparent region 830 of the halftone mask 800 forms the opening 700, the semi-transparent region 820 of the halftone mask 800 forms the second light-shielding unit 420, and the opaque region 810 of the halftone mask 800 forms the first light-shielding unit 410, which refer to fig. 2 and 3, where fig. 3 exemplifies the first light-shielding unit 410. Wherein (a) of FIG. 3 is a line a in FIG. 21a2Fig. 3 (b) is a view taken along b in fig. 21b2Schematic view of a partial structure of (1).
In this embodiment, in a direction away from the array substrate 200, a cross-sectional area of the first light shielding unit 410 and/or the second light shielding unit 420 in a first cross-section is gradually increased, and the first cross-section is parallel to the display panel 100, please refer to fig. 4 specifically. The openings 700 formed by two adjacent second light-shielding units 420 and two adjacent first light-shielding units 410 are small in opening and large in bottom, so that color mixing of light with different colors can be further prevented, and the display effect is improved.
In this embodiment, the step S300 further includes forming a protruding unit 430 on an edge region of the first light shielding unit 410 and/or the second light shielding unit 420 near the light emitting unit 600 by using a halftone mask 800, as shown in fig. 5.
In this embodiment, the protruding unit 430 is perpendicular to the display panel 100. The color mixing phenomenon can be avoided to the maximum extent.
In this embodiment, the protruding units 430 and the display panel 100 are disposed non-perpendicularly. The thickness of the display panel 100 is reduced while ensuring avoidance of color mixing. When the protruding unit 430 is disposed parallel to the display panel 100, the light emitting area of the light emitting unit 600 is reduced.
S400, filling the opening 700 with the light emitting unit 600.
In this embodiment, the light emitting unit 600 emits light of any one of red, green, and blue.
In this embodiment, in step S300, the first light shielding unit 410 and the second light shielding unit 420 with different widths are formed to form the openings 700 with different opening areas, where the opening areas of the openings 700 include a first opening area, a second opening area, and a third opening area. Wherein the first opening area is larger than the second opening area and the third opening area. The third opening area may be equal to the second opening area.
Step S400 includes:
s410, the light emitting unit 600 filled in the opening 700 corresponding to the first opening area generates blue light.
S420, the light emitting unit 600 filled in the opening 700 corresponding to the second opening area generates green color light.
S430, the light emitting unit 600 filled in the opening 700 corresponding to the area of the third opening generates red light.
In this embodiment, the light emitting unit 600 filled in the opening 700 emits light of any one of red, green and blue. Since the human eye is sensitive to red and green light and not to blue light, the filling area of the blue light emitting unit 600 is increased, that is, the light emitting unit capable of emitting blue light is filled in the opening corresponding to the first opening area, which is shown as the first opening 710. The opening corresponding to the second opening area is filled with a light emitting unit capable of emitting green light, which is shown as a second opening 720. A light emitting unit capable of emitting red light is filled in the opening corresponding to the area of the third opening, which corresponds to the third opening 730 in the figure, specifically refer to fig. 6. The light emitting unit 600 of green and red light can achieve the purpose of sensitively adjusting the pixel point by a smaller light emitting area.
In this embodiment, the area ratio of the first opening area to the second opening area is 2: 1. The area ratio of the first opening area to the third opening area is 2: 1. That is, two light emitting units 600 of red color light and two light emitting units 600 of green color light correspond to one light emitting unit 600 of blue color light. The method just forms a rectangular pixel array, so that the color change of the pixels is better adjusted, the color is more accurately displayed, and the display effect is improved.
In this embodiment, the light emitting units 600 filled in the openings 700 in two adjacent first light shielding units 410 have the same light emitting color, specifically refer to fig. 2 and 6, where R in fig. 2 and 6 represents a red light emitting unit, G represents a green light emitting unit, and B represents a blue light emitting unit. When the luminescent materials are ink-jet printed, the luminescent materials of the same color can flow on the second light shielding unit 420 between two adjacent first light shielding units 410, so that the luminescent materials of the same color are uniformly distributed. Although the light emitting units 600 with the same color do not involve the problem of color mixing, the second light shielding unit 420 can prevent the brightness from mixing and improve the display effect.
In this embodiment, before step S500, the method further includes:
s440, forming a filling unit 440 on the second light shielding unit 420, wherein a sum of a thickness of the filling unit 440 and a thickness of the second light shielding unit 420 is equal to a thickness of the first light shielding unit 410, please refer to fig. 1 specifically.
In this embodiment, the filling unit 440 can serve to planarize the light-shielding layer 400, i.e., planarize the pixel defining layer. When the filling unit 440 of the other cover is a light shielding material, the filling unit 440 may prevent color mixing. When the filling unit 440 is made of a metal material, the filling unit 440 can enhance the utilization rate of the color light by utilizing the light reflection property of the metal. When the filling unit 440 is made of the cathode layer 500, the filling unit 440 may utilize the characteristic that the cathode layer 500 is made of a transparent material, and does not affect the light transmittance.
S500, forming a cathode layer 500 on the light-shielding layer 400 to form the display panel 100, please refer to fig. 1.
In this embodiment, the cathode layer 500 may be made of transparent conductive glass.
The shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
The application discloses a display panel and a manufacturing method thereof. The display panel comprises an array substrate, an anode layer positioned on the array substrate, a shading layer positioned on the anode layer and a cathode layer positioned on the shading layer; the shading layer comprises a plurality of first shading units and a plurality of second shading units, the first shading units and the second shading units are vertically arranged, and the second shading units are positioned between two adjacent first shading units; two adjacent second shading units and two adjacent first shading units form an opening, the anode layer is exposed by the opening, and the opening is filled with a light-emitting unit; the thickness of the second shading unit is smaller than that of the first shading unit, and the thickness of the second shading unit is larger than or equal to that of the light emitting unit. The shading layer is formed by utilizing the shading material to form the pixel defining layer, so that the color mixing phenomenon among the light emitting units with different colors is avoided, and the display effect is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above embodiments of the present application are described in detail, and specific examples are applied in the present application to explain the principles and implementations of the present application, and the description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A display panel is characterized by comprising an array substrate, an anode layer positioned on the array substrate, a shading layer positioned on the anode layer and a cathode layer positioned on the shading layer;
the light shielding layer comprises a plurality of first light shielding units and a plurality of second light shielding units, the first light shielding units and the second light shielding units are vertically arranged, and the second light shielding units are positioned between two adjacent first light shielding units;
two adjacent second shading units and two adjacent first shading units form an opening, the anode layer is exposed through the opening, and a light emitting unit is filled in the opening;
the thickness of the second shading unit is smaller than that of the first shading unit, and the thickness of the second shading unit is larger than or equal to that of the light emitting unit.
2. The display panel according to claim 1, wherein a difference between a thickness of the first light shielding unit and a thickness of the second light emitting unit is greater than 0.6 μm.
3. The display panel according to claim 1, further comprising a filler on the second light shielding unit, wherein a sum of a thickness of the filler and a thickness of the second light shielding unit is equal to a thickness of the first light shielding unit.
4. The display panel according to claim 3, wherein the material of the filling unit includes a light shielding material, a metal material, and a material of the cathode layer.
5. The display panel according to claim 1, wherein a cross-sectional area of the first light shielding unit and/or the second light shielding unit in a first cross-section in a direction away from the array substrate is gradually increased, the first cross-section being parallel to the display panel.
6. The display panel according to claim 5, wherein the opening areas of the openings include a first opening area, a second opening area, and a third opening area;
the light-emitting units filled in the openings corresponding to the first opening area generate blue color light;
wherein the first opening area is larger than the second opening area and the third opening area.
7. The display panel according to claim 1, wherein the first light shielding unit and/or the second light shielding unit is provided with a protruding unit near an edge region of the light emitting unit.
8. A method for manufacturing a display panel is characterized by comprising the following steps:
forming an anode layer on the array substrate;
forming a shading material film layer on the anode layer;
forming a light shielding layer comprising a plurality of first light shielding units and a plurality of second light shielding units on the light shielding material film layer by using a half-tone photomask, wherein openings are formed between two adjacent second light shielding units and two adjacent first light shielding units, the first light shielding units and the second light shielding units are vertically arranged, and the second light shielding units are positioned between two adjacent first light shielding units;
filling a light emitting unit in the opening;
forming a cathode layer on the light-shielding layer to form a display panel;
the thickness of the second shading unit is smaller than that of the first shading unit, and the thickness of the second shading unit is larger than or equal to that of the light emitting unit.
9. The method of claim 8, wherein a cross-sectional area of the first light shielding unit and/or the second light shielding unit in a first cross-section is gradually increased in a direction away from the array substrate, and the first cross-section is parallel to the display panel.
10. The method according to claim 9, wherein the opening areas of the openings include a first opening area, a second opening area, and a third opening area;
the light emitting units filled in the openings corresponding to the first opening area generate blue color light, and the first opening area is larger than the second opening area and the third opening area.
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Application publication date: 20200915 |