Display panel, preparation method thereof and display device

Abstract

The invention discloses a display panel, a preparation method thereof and a display device. The display panel comprises a light-emitting substrate, a color filter layer and packaging glue. The light-emitting substrate comprises a light-emitting area and a non-light-emitting area located on at least one side of the light-emitting area. The color filter layer is located on one side of the light-emitting substrate. The color filter layer comprises at least two dimming color resistance structures located in the non-light-emitting area, every two adjacent dimming color resistance structures are arranged side by side in the first direction, and a first gap is formed between any two adjacent dimming color resistance structures; the packaging adhesive is located on the side, away from the light-emitting substrate, of the color filter layer and located in the non-light-emitting area; the packaging adhesive covers the dimming color resistance structure and fills the first gap. According to the technical scheme, the structure of the non-display area can be optimized, and the display effect is improved while the product quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] The display panel usually includes a display area and a non-display area. In one related technology, the non-display area absorbs external ambient light by setting a light-absorbing film layer (referred to as the light-absorbing film layer) to improve the visual effect. However, in this solution, there is a water vapor transmission path because there is no film layer protection on the outside of the light-absorbing film layer. It is easy to cause peeling between the film layers under high temperature and high humidity environment for a long time, resulting in poor bubbles and affecting the display effect. In another related technology, the non-display area isolates water vapor by setting a sufficiently wide frame sealant, but since the frame sealant cannot absorb external ambient light, it is easy to cause strong light reflection, affecting the display effect. It can be seen that the prior art lacks further optimization of the design of the non-display area to improve the display effect while ensuring product quality. Summary of the invention

[0003] The present invention provides a display panel and a manufacturing method thereof, and a display device, so as to optimize the structure of a non-display area and improve the display effect while ensuring product quality.

[0004] According to one aspect of the present invention, there is provided a display panel, the display panel comprising:

[0005] The light-emitting substrate comprises a light-emitting area and a non-light-emitting area located at least on one side of the light-emitting area;

[0006] A color filter layer is located on one side of the light-emitting substrate; the color filter layer includes at least two dimming color resist structures located in the non-light-emitting area, two adjacent dimming color resist structures are arranged side by side along a first direction, and a first gap is provided between any two adjacent dimming color resist structures; the first direction is a direction from the non-light-emitting area to the light-emitting area;

[0007] The packaging glue is located on a side of the color filter layer away from the light-emitting substrate and in the non-light-emitting area; the packaging glue covers the dimming color-resist structure and fills the first gap.

[0008] Optionally, the color filter layer further includes a light-shielding color-resistance structure located in the light-emitting region and at least two light-filtering color-resistance structures of different colors, and the light-shielding color-resistance structure is located between any two adjacent light-filtering color-resistance structures;

[0009] The dimming color-resist structure includes a first dimming sub-section; the first dimming sub-section and the light-shielding color-resist structure are prepared in the same process; and / or,

[0010] The dimming color-resist structure comprises a second dimming sub-section of at least one color; the second dimming sub-section and the light filtering color-resist structure of the same color are prepared in the same process.

[0011] Optionally, the dimming color resist structure includes a first dimming section and a second dimming section, and the first dimming section and the second dimming section are stacked along a second direction; the second direction is perpendicular to the plane where the light-emitting substrate is located.

[0012] Optionally, a maximum width of the first gap in the first direction is less than 5 μm.

[0013] Optionally, a cross-sectional shape of the first gap on the first cross section is at least one of a rectangle, a trapezoid and a triangle, and the first cross section is parallel to the first direction and perpendicular to the plane where the light-emitting substrate is located.

[0014] Optionally, the display panel further includes:

[0015] The thin film encapsulation layer is located on a side of the light-emitting substrate close to the color filter layer and covers the light-emitting substrate;

[0016] A first planarization layer is located between the color filter layer and the thin film encapsulation layer, and covers the light-emitting area and at least a portion of the non-light-emitting area;

[0017] A second planarization layer is located on a side of the color filter layer away from the light-emitting substrate and located in the light-emitting area;

[0018] A first optical adhesive layer is located on a side of the second planarization layer away from the light-emitting substrate and is located in the light-emitting area;

[0019] The packaging glue includes a first surface and a second surface, the first surface is located on the side of the second surface away from the light-emitting substrate; the first optical glue layer includes a third surface and a fourth surface, the third surface is located on the side of the fourth surface away from the light-emitting substrate; the first surface is flush with the third surface.

[0020] Optionally, the non-luminescent area surrounds the luminescent area, and the orthographic projection shape of the dimming color-resist structure on the luminescent substrate is a square or a ring.

[0021] According to another aspect of the present invention, a method for preparing a display panel is provided, the method comprising:

[0022] forming a light-emitting substrate; the light-emitting substrate comprises a light-emitting area and a non-light-emitting area located at least on one side of the light-emitting area;

[0023] A color filter layer is formed on one side of the light-emitting substrate; the color filter layer includes at least two dimming color resist structures located in the non-light-emitting area, two adjacent dimming color resist structures are arranged side by side along a first direction, and a first gap is provided between any two adjacent dimming color resist structures; the first direction is a direction from the non-light-emitting area to the light-emitting area;

[0024] A packaging glue is formed on a side of the color filter layer away from the light-emitting substrate; the packaging glue is located in the non-light-emitting area; the packaging glue covers the dimming color resistance structure and fills the first gap.

[0025] Optionally, the dimming color resist structure includes a first dimming section and / or a second dimming section of at least one color; and forming a color filter layer on one side of the light-emitting substrate includes:

[0026] Forming a light-shielding color-resistance layer on one side of the light-emitting substrate, and performing a first patterning process on the light-shielding color-resistance layer to obtain a light-shielding color-resistance structure;

[0027] A light filtering color resist layer is formed on a side of the light-shielding color resist structure away from the light-emitting substrate, and the light filtering color resist layer is subjected to a second patterning process to obtain a light filtering color resist structure; in the light-emitting area, the color filter layer includes at least two light filtering color resist structures of different colors, and the light-shielding color resist structure is located between any two adjacent light filtering color resist structures;

[0028] Wherein, while obtaining the light-shielding color-resistance structure, a first dimming section is also obtained through a first patterning process; and / or,

[0029] While obtaining the light filtering color resist structure, the second dimming section is also obtained through the second patterning process.

[0030] According to another aspect of the present invention, a display device is provided. The display device includes the display panel provided by any embodiment of the present invention.

[0031] The technical solution of the embodiment of the present invention is to set a color filter layer including at least two dimming color resist structures located in the non-luminous area, so that two adjacent dimming color resist structures are arranged side by side along a first direction, and there is a first gap between any two adjacent dimming color resist structures, so that the dimming color resist structure can be used to absorb at least part of the ambient light, weaken the strong light reflection, and improve the display effect. The design of having a first gap between adjacent dimming color resist structures can also be used to make the encapsulation glue cover the dimming color resist structure and fill the first gap, thereby extending the water vapor transmission path, and in a high temperature and high humidity environment, the water vapor is blocked in the encapsulation glue at the first gap, thereby avoiding film layer separation and ensuring product quality.

[0032] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention;

[0035] Figure 2 is along Figure 1 A schematic cross-sectional structure diagram of a display panel taken at CC';

[0036] Figure 3 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present invention;

[0037] Figure 4 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0038] Figure 5 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0039] Figure 6 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0040] Figure 7 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0041] Figure 8 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0042] Fig. 9 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0043] Fig.10 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention;

[0044] Fig.11 is a schematic flow chart of a method for manufacturing a display panel provided by an embodiment of the present invention;

[0045] Figure 12-Figure 19 is a schematic diagram of a preparation process of a color filter layer in a display panel provided by an embodiment of the present invention;

[0046] Fig. 20 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0048] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0049] First of all, it should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left" and "right" and similar words are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, the shapes and sizes of the components in the accompanying drawings do not reflect the true proportions, and the purpose is only to illustrate the content of the present invention.

[0050] Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention, Figure 2 is along Figure 1 A schematic diagram of a cross-sectional structure of a display panel taken from CC' in FIG. Figure 1 and Figure 2As shown, the display panel 100 provided by the embodiment of the present invention includes a light-emitting substrate 10, a color filter layer 20 and a packaging glue 30; the light-emitting substrate 10 includes a light-emitting area AA and a non-light-emitting area NA located on at least one side of the light-emitting area AA; the color filter layer 20 is located on one side of the light-emitting substrate 10; the color filter layer 20 includes at least two dimming color resist structures 21 located in the non-light-emitting area NA, and two adjacent dimming color resist structures 21 are arranged side by side along a first direction D1, and there is a first gap 201 between any two adjacent dimming color resist structures 21; the packaging glue 30 is located on a side of the color filter layer 20 away from the light-emitting substrate 10, and is located in the non-light-emitting area NA; the packaging glue 30 covers the dimming color resist structure 21 and fills the first gap 201.

[0051] like Figure 2 As shown, the light-emitting substrate 10 may specifically include a substrate 11, a driving circuit layer 12 and a light-emitting element layer from bottom to top, wherein the light-emitting element layer includes a plurality of light-emitting elements 13, the driving circuit layer 12 includes a pixel circuit 121, and the pixel circuit 121 is electrically connected to the light-emitting element 13 for driving the light-emitting element 13 to emit light.

[0052] Exemplarily, the substrate 11 may be a silicon-based substrate; the driving circuit layer 12 may also include but is not limited to circuit structures such as a gate driving circuit and an electrostatic protection circuit, which is not limited in the embodiment of the present invention; the light-emitting element 13 may be, for example, an OLED (Organic Light Emitting Diode).

[0053] It should be noted that the luminous colors of the light-emitting elements 13 may be the same or different, and the embodiment of the present invention is not limited thereto. Optionally, the light-emitting element layer includes at least two light-emitting elements with different luminous colors. Exemplarily, the light-emitting element layer includes a plurality of red light-emitting elements, green light-emitting elements, and blue light-emitting elements to achieve color display.

[0054] Reference Figure 2 It can be understood that the light-emitting area AA in the light-emitting substrate 10, that is, the area where the light-emitting element 13 is located, corresponds to the display area of ​​the display panel and is used to display the picture; the non-light-emitting area NA in the light-emitting substrate 10 corresponds to the non-display area of ​​the display panel.

[0055] Further, such as Figure 2 As shown, in this embodiment, a color filter layer 20 and a packaging glue 30 are provided on one side of the light-emitting substrate 10. In the non-light-emitting area NA, the color filter layer 20 includes at least two dimming color resist structures 21 arranged side by side along a first direction D1, and a first gap 201 is provided between two adjacent dimming color resist structures 21. The packaging glue 30 covers the dimming color resist structure 21 and fills the first gap 201.

[0056] Among them, the first direction DA is the direction pointing from the non-light-emitting area NA to the light-emitting area AA. Exemplarily, referring to Figure 1 , Figure 1 , both the X direction and the Y direction can be understood as the first direction. In addition, Figure 1 , the diagonal direction of the rectangle shown can also be understood as the first direction. Any direction pointing from the non-light-emitting area NA to the light-emitting area AA can be understood as the first direction D1.

[0057] Among them, the color filter layer 20 usually functions to achieve color display, improve contrast and brightness, etc. In the display area, the color filter layer is mainly composed of a black matrix and color resistors. In this embodiment, the dimming color resistor structure 21 is also a color resistor with a color (the type of color is not limited). In other words, the dimming color resistor structure 21 is opaque. By setting the color filter layer 20 in the non-light-emitting area to include the dimming color resistor structure 21, at least part of the external ambient light can be absorbed by the dimming color resistor structure 21, thereby weakening the strong light reflection and avoiding the strong light reflection from affecting the display effect.

[0058] Further, in this embodiment, in the non-light-emitting area NA, there is a first gap 201 between two adjacent dimming color resistor structures 21 along the first direction D1. In this way, when the encapsulant 30 is made in the non-light-emitting area NA, the encapsulant 30 can cover the dimming color resistor structure 21 and fill the first gap 201. Furthermore, in a high-temperature and high-humidity environment, when water vapor transmits inward, it needs to pass through multiple steps, thereby extending the water vapor transmission path, making the water vapor be blocked in the encapsulant at the first gap 201, avoiding film layer separation, solving the problem of bubble defects, and ensuring product quality.

[0059] In summary, in the embodiment of the present invention, by setting the color filter layer to include at least two dimming color resistor structures located in the non-light-emitting area, the two adjacent dimming color resistor structures are arranged side by side along the first direction, and there is a first gap between any two adjacent dimming color resistor structures, so that at least part of the ambient light can be absorbed by the dimming color resistor structure, weakening the strong light reflection and improving the display effect. Also, through the design of having a first gap between adjacent dimming color resistor structures, the encapsulant can cover the dimming color resistor structure and fill the first gap, extending the water vapor transmission path, making the water vapor be blocked in the encapsulant at the first gap in a high-temperature and high-humidity environment, avoiding film layer separation, and ensuring product quality.

[0060] Based on the above embodiment, referring to Figure 1 , optionally, the non-light-emitting area NA surrounds the light-emitting area AA, and the orthographic projection shape of the dimming color resistor structure 21 on the light-emitting substrate 10 is a square shape or an annular shape.

[0061] Among them, the square shape can be a rectangle or a rounded rectangle, and the embodiment of the present invention does not limit this, Fig.10The orthographic projection shape of the dimming color resist structure 21 is a rectangle as an example for illustration. In other embodiments, the orthographic projection shape of the dimming color resist structure 21 may also be annular, such as a circular ring or an elliptical ring, which is not limited in the embodiment of the present invention.

[0062] In this embodiment, the dimming color resist structure is formed into a closed-loop structure by setting the orthographic projection shape of the dimming color resist structure to be a square or a ring. The first gap between adjacent dimming color resist structures forms a groove. When the encapsulation glue fills the groove, water vapor can be blocked in all directions to ensure the quality of the display panel.

[0063] Reference Figure 1 and Figure 2 Optionally, the color filter layer 20 further includes a light-shielding color-resistance structure 22 located in the light-emitting area AA and at least two light-filtering color-resistance structures 23 of different colors, and the light-shielding color-resistance structure 22 is located between any two adjacent light-filtering color-resistance structures 23 .

[0064] The light-shielding color-resist structure 22 plays a light-shielding role, and may be, for example, a black color-resist, which is often referred to as a black matrix (BM) in the industry.

[0065] The filter color-block structure 23 plays a role in filtering light, that is, allowing light of a certain color to pass through and absorbing light of other colors. Figure 2 As shown, optionally, the filter color resist structure 23 includes a blue color resist structure 231, a red color resist structure 232 and a green color resist structure 233, which can allow blue light, red light and green light to pass through in turn. Optionally, the blue color resist structure 231 is arranged corresponding to the blue light-emitting element, the red color resist structure 232 is arranged corresponding to the red light-emitting element, and the green color resist structure 233 is arranged corresponding to the green light-emitting element to improve contrast and brightness.

[0066] Further optionally, the dimming color resist structure includes a first dimming section; the first dimming section and the light-shielding color resist structure are prepared in the same process; and / or the dimming color resist structure includes a second dimming section of at least one color; the second dimming section and the light-filtering color resist structure of the same color are prepared in the same process. In other words, the dimming color resist structure may include a light-shielding color resist and at least one of at least two light-filtering color resists. Among them, the light-shielding color resist may be understood as the color resist that forms the light-shielding color resist structure, and the light-filtering color resist may be understood as the color resist that forms the light-filtering color resist structure. Since both the light-shielding color resist and the light-filtering color resist have a certain light-absorbency, the dimming color resist structure includes the light-shielding color resist and at least one of at least two light-filtering color resists, which can achieve the effect of absorbing external ambient light, weakening strong light reflection, and improving the display effect.

[0067] For example, Figure 3 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in. Figure 3 As shown, as a feasible implementation, optionally, the dimming color-resist structure 21 includes a first dimming sub-portion 211 ; the first dimming sub-portion 211 and the light-shielding color-resist structure 22 are prepared in the same process.

[0068] Specifically, in this embodiment, the dimming color resist structure 21 may only include the first dimming sub-section 211, which is formed by black color resist and is prepared in the same process as the light-shielding color resist structure 22. The black color resist can absorb light of various colors, thereby effectively reducing strong light reflection and improving the display effect.

[0069] For example, Figure 4 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in. Figure 4 As shown, as another feasible implementation, optionally, the dimming color resist structure 21 includes a second dimming sub-section 212 of at least one color; the second dimming sub-section 212 and the filter color resist structure 23 of the same color are prepared in the same process.

[0070] Specifically, in this embodiment, the dimming color resist structure 21 may only include at least one color of the second dimming sub-section 212, and any second dimming sub-section 212 may be formed by a color filter color resist and prepared in the same process as the color filter color resist structure 23. The color filter color resist can also absorb a certain amount of light, thereby weakening strong light reflection and improving the display effect.

[0071] It should be noted that Figure 4 The dimming color resist structure 21 includes a second dimming segment 212 of one color, and the second dimming segment 212 is formed of a blue color resist, and is prepared in the same process as the blue color resist structure 231 in the light-emitting area AA. In other embodiments, when the dimming color resist structure 21 includes a second dimming segment 212 of one color, the second dimming segment 212 may also be formed of color resists of other colors, which is not limited in the embodiment of the present invention.

[0072] also, Figure 5 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in. Figure 5 In other embodiments, the dimming color resist structure 21 includes second dimming color resist sections 212 of two or more colors, and any second dimming section 212 and the filter color resist structure 23 of the same color are prepared in the same process. Figure 5 , Figure 5Take the dimming color resist structure 21 including the second dimming sections 212 of two colors, one of which is formed by blue color resist and is prepared in the same process as the blue color resist structure 231 of the light-emitting area AA, and the other second dimming section 212 is formed by red color resist and is prepared in the same process as the red color resist structure 232 of the light-emitting area AA as an example for illustration. This setting is not unique. In other embodiments, when the dimming color resist structure 21 includes at least two colors of second dimming sections 212, the number of second dimming sections 212 and the color of each second dimming section 212 can be set as needed. The embodiment of the present invention does not limit this, and no examples are given here.

[0073] For example, Figure 6 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in. Figure 6 As shown, as another feasible implementation, optionally, the dimming color resist structure 21 includes a first dimming section 211 and a second dimming section 212 of at least one color; the first dimming section 211 and the light-shielding color resist structure 22 are prepared in the same process; the second dimming section 212 and the filtering color resist structure 23 of the same color are prepared in the same process.

[0074] Specifically, in this embodiment, the dimming color-resist structure 21 includes both the first dimming sub-portion 211 and the filtering color-resist structure 212 . The specific configuration can be understood by referring to the above description, and will not be elaborated herein.

[0075] It should be noted that Figure 6 The dimming color resist structure 21 includes a second dimming segment 212 of one color in addition to the first dimming segment 211, and the second dimming segment 212 is formed of a red color resist and is prepared in the same process as the red color resist structure 232 in the light-emitting area AA. In other embodiments, in addition to the first dimming segment 211, the dimming color resist structure 21 also includes two or more second dimming segments 212, which is not limited in the embodiment of the present invention.

[0076] like Figure 6 As shown, when the dimming color resist structure 21 includes a first dimming section 211 and a second dimming section 212, the first dimming section 211 and the second dimming section 212 are optionally stacked along a second direction D2, wherein the second direction D2 is perpendicular to the plane where the light-emitting substrate 10 is located.

[0077] Such a configuration can ensure the dimming color resist structure 21's absorption effect on ambient light while preventing the dimming color resist structure 21 from having too large a width in the first direction D1, thereby avoiding the need to design a sufficient width for the non-luminous area NA to accommodate the dimming color resist structure 21, which is conducive to meeting the design requirements of a narrow frame. Figure 5 When the dimming color resist structure 21 includes the second dimming sections 212 of two or more colors, the second dimming sections 212 of different colors can be stacked along the second direction D2.

[0078] It should be noted that the embodiment of the present invention does not limit the upper and lower positional relationship between the first dimming sub-section 211 and the second dimming sub-section 212 , which can be determined according to the order of preparation.

[0079] Reference Figure 2 Optionally, the maximum width L of the first gap 201 in the first direction D1 is less than 5 μm. In this way, it is possible to ensure that the encapsulation glue 30 can be filled into the first gap 201 while ensuring that the dimming color resist structure 21 occupies a sufficiently large area, thereby ensuring that light from all angles can be irradiated onto the dimming color resist structure 21 and absorbed by it, thereby avoiding strong light reflection in the non-display area and affecting the display effect.

[0080] Reference Figure 2 Optionally, the first gap 201 is in the first section (eg Figure 2 The cross-sectional shape on the cross-sectional view shown in FIG. 1 is a rectangle. The first cross-sectional view is parallel to the first direction D1 and perpendicular to the plane where the light-emitting substrate 10 is located.

[0081] Figure 7 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in, such as Figure 7 As shown, in other embodiments, optionally, the cross-sectional shape of the first gap 201 on the first cross section is a trapezoid. At this time, the maximum width of the first gap 201 in the first direction D1 is the width of the larger opening between the upper opening and the lower opening.

[0082] Figure 8 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in, such as Figure 8 As shown, in other embodiments, optionally, the cross-sectional shape of the first gap 201 on the first cross section is a triangle.

[0083] It should be noted that the embodiment of the present invention only takes the example that the cross-sectional shapes of the first gaps 201 on the first section are the same. In some embodiments, the cross-sectional shapes of different first gaps 201 on the first section may also be different, and the embodiment of the present invention is not limited to this.

[0084] Fig. 9 is a schematic cross-sectional structure diagram of another display panel provided by an embodiment of the present invention. The section line can refer to Figure 1 CC' in, such as Fig. 9 As shown, optionally, the display panel also includes a thin film encapsulation layer 40, a first planarization layer 80, a second planarization layer 50 and a first optical adhesive layer 60; the thin film encapsulation layer 40 is located on the side of the light-emitting substrate 10 close to the color filter layer 20, and covers the light-emitting substrate 10; the first planarization layer 80 is located between the color filter layer 20 and the thin film encapsulation layer 40, covering the light-emitting area AA and at least part of the non-light-emitting area NA; the second planarization layer 50 is located on the side of the color filter layer 20 away from the light-emitting substrate 10, and is located in the light-emitting area AA; the first optical adhesive layer 60 is located on the side of the second planarization layer 50 away from the light-emitting substrate 10, and is located in the light-emitting area AA; wherein the encapsulation glue 30 includes a first surface F1 and a second surface F2, the first surface F1 is located on the side of the second surface F2 away from the light-emitting substrate 10; the first optical adhesive layer 60 includes a third surface F3 and a fourth surface F4, the third surface F3 is located on the side of the fourth surface F4 away from the light-emitting substrate 10; the first surface F1 is flush with the third surface F3.

[0085] Among them, the thin film encapsulation layer 40 is usually formed by alternating multiple layers of organic material layers and inorganic material layers, which can effectively isolate the corrosion of electronic devices by external harmful substances such as water and oxygen, protect the underlying structure, and also take into account the flexibility of the material to meet the needs of complex application scenarios.

[0086] The first planarization layer 80 can further improve the flatness of the film layer, so that the color filter layer 20 is formed on the flat film layer, thereby improving product quality. For example, the first planarization layer 80 can be a transparent resin material, such as transparent optical adhesive OC.

[0087] For example, Fig. 9 Take the example that the first planarization layer 80 covers the entire light-emitting area AA and the non-light-emitting area NA. Fig.10 The cross-sectional structure diagram of another display panel provided by the embodiment of the present invention is shown in FIG. 8 , and the first planarization layer 80 may also cover a portion of the light-emitting area AA and the non-light-emitting area NA, which is not limited in the embodiment of the present invention. Fig.10 As shown, in this example, the first planarization layer 80 has an opening corresponding to the first gap 201 in the non-light emitting area NA, and the packaging glue 30 fills the opening.

[0088] It should be noted that whether the first planarization layer 80 is provided can be determined according to actual needs, and the embodiment of the present invention does not limit this. Figure 2-Figure 8 Optionally, in other embodiments, when the flatness of the upper surface of the thin film encapsulation layer 40 meets the requirements, the first planarization layer may not be provided, that is, the color filter layer 20 is directly manufactured on the thin film encapsulation layer 40 .

[0089] The second planarization layer 50 is used to planarize the portion of the color filter layer 20 in the light emitting area AA. Fig. 9 The thickness of the filter color resist structures 23 of different colors in the second direction can be set differently to improve the display effect. Further, the height difference between the filter color resist structures 23 of different colors can be compensated by setting the second planarization layer 50 to planarize the film layer. Exemplarily, the second planarization layer 50 can be formed of a transparent resin.

[0090] The first optical adhesive layer 60 is used to form a firm connection with the second planarization layer 50 and the glass cover plate 70 to ensure the reliability of the product. For example, the first optical adhesive layer can be a transparent optical adhesive.

[0091] Further, refer to Fig. 9 By setting the upper surface of the packaging glue 30 (ie, the first surface F1) flush with the upper surface of the first optical adhesive layer 60 (ie, the third surface F3), the glass substrate 70 can be fixed on a flat surface to ensure the reliability of the product.

[0092] It should be noted that the film layer structure of the above-mentioned display panel is only for illustration and does not constitute a limitation of the present invention. Any solution in which a color filter layer is provided including at least two dimming color resist structures located in a non-luminous area, two adjacent dimming color resist structures are arranged side by side along a first direction, and a first gap is provided between any two adjacent dimming color resist structures; and the packaging glue in the non-luminous area covers the dimming color resist structure and fills the first gap, is included in the protection scope of the present invention.

[0093] Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing a display panel. Fig.11 is a schematic flow chart of a method for preparing a display panel provided by an embodiment of the present invention, such as Fig.11 As shown, the preparation method comprises the following steps:

[0094] S101, forming a light-emitting substrate; the light-emitting substrate comprises a light-emitting area and a non-light-emitting area located at least on one side of the light-emitting area.

[0095] Reference Fig.10The light-emitting substrate 10 includes a substrate 11, a driving circuit layer 12 and a light-emitting element layer, and the light-emitting element layer includes a plurality of light-emitting elements 13. The process of forming the light-emitting substrate is the process of manufacturing the substrate 11, the driving circuit layer 12 and the light-emitting element layer at the same time, which will not be described in detail here, and those skilled in the art can design it by themselves.

[0096] S102. Form a color filter layer on one side of the light-emitting substrate; the color filter layer includes at least two dimming color resist structures located in the non-light-emitting area, two adjacent dimming color resist structures are arranged side by side along a first direction, and there is a first gap between any two adjacent dimming color resist structures; the first direction is a direction from the non-light-emitting area to the light-emitting area.

[0097] Reference Fig.10 The color filter layer 20 includes at least two dimming color resist structures 21 located in the non-luminous area NA. Two adjacent dimming color resist structures 21 are arranged side by side along the first direction D1, and a first gap 201 is formed between any two adjacent dimming color resist structures 21.

[0098] Specifically, the color filter layer includes a portion located in the light-emitting area and a portion located in the non-light-emitting area (i.e., a dimming color resist structure). The dimming color resist structure in the non-light-emitting area and the portion in the light-emitting area can be manufactured simultaneously, which will be described in detail later and will not be elaborated here.

[0099] S103, forming a packaging glue on a side of the color filter layer away from the light-emitting substrate; the packaging glue is located in the non-light-emitting area; the packaging glue covers the dimming color resist structure and fills the first gap.

[0100] Reference Fig.10 The encapsulation glue 30 is located on a side of the color filter layer 20 away from the light-emitting substrate 10 and in the non-light-emitting area NA, covering the dimming color resist structure 21 and filling the first gap 201 .

[0101] Based on the above description, in an embodiment of the present invention, when a color filter layer is formed on one side of the light-emitting substrate, the color filter layer includes at least two dimming color resist structures located in the non-light-emitting area, and two adjacent dimming color resist structures are arranged side by side along a first direction, and a first gap is provided between any two adjacent dimming color resist structures, so that the dimming color resist structure can be used to absorb at least part of the ambient light, weaken the strong light reflection, and improve the display effect. The design of having a first gap between adjacent dimming color resist structures can also be used to make the encapsulation glue cover the dimming color resist structure and fill the first gap, thereby extending the water vapor transmission path, and in a high temperature and high humidity environment, the water vapor is blocked in the encapsulation glue at the first gap, thereby avoiding film layer separation and ensuring product quality.

[0102] Reference Figure 1 Optionally, the non-luminescent area NA surrounds the luminescent area AA, and the orthographic projection shape of the dimming color resist structure 21 on the luminescent substrate 10 is a square or ring shape.

[0103] Reference Figure 2 Optionally, a maximum width L of the first gap 201 in the first direction D1 is less than 5 μm.

[0104] Reference Figure 7-Figure 9 Optionally, the cross-sectional shape of the first gap 201 on the first cross section is at least one of a rectangle, a trapezoid and a triangle, and the first cross section is parallel to the first direction and perpendicular to the plane where the light-emitting substrate 10 is located.

[0105] Reference Figure 3 The color filter layer 20 includes a light-shielding color-resistance structure 22 located in the light-emitting area AA and at least two light-filtering color-resistance structures 23 of different colors, and the light-shielding color-resistance structure 22 is located between any two adjacent light-filtering color-resistance structures 23. Figure 3-Figure 6 Optionally, the dimming color resist structure 21 includes a first dimming sub-section 211 and / or a second dimming sub-section 212 of at least one color; accordingly, the forming of a color filter layer on one side of the light-emitting substrate (S102) includes the following steps:

[0106] Forming a light-shielding color-resistance layer on one side of the light-emitting substrate, and performing a first patterning process on the light-shielding color-resistance layer to obtain a light-shielding color-resistance structure;

[0107] A light filtering color resist layer is formed on a side of the light-shielding color resist structure away from the light-emitting substrate, and the light filtering color resist layer is subjected to a second patterning process to obtain a light filtering color resist structure; in the light-emitting area, the color filter layer includes at least two light filtering color resist structures of different colors, and the light-shielding color resist structure is located between any two adjacent light filtering color resist structures;

[0108] Wherein, while obtaining the light-shielding color-resistance structure, a first dimming section is also obtained through a first patterning process; and / or,

[0109] While obtaining the light filtering color resist structure, the second dimming section is also obtained through the second patterning process.

[0110] Specifically, the preparation steps of the color filter layer 20 are related to the dimming color resist structure. Different dimming color resist structures correspond to different preparation steps of the color filter layer.

[0111] Specifically, refer to Figure 3When the dimming color resist structure 21 only includes the first dimming sub-section 211, the step of forming the color filter layer 20 is specifically as follows: forming a light-shielding color resist layer on one side of the light-emitting substrate 10, and performing a first patterning process on the light-shielding color resist layer to simultaneously obtain the light-shielding color resist structure 22 and the first dimming sub-section 211. Next, forming a filter color resist layer on the side of the light-shielding color resist structure 22 away from the light-emitting substrate 10, and performing a second patterning process on the filter color resist layer to obtain a filter color resist structure 23. This step can be repeated according to the number of color types of the filter color resist structure 23 to obtain filter color resist structures of at least two different colors. Exemplarily, with Figure 3 Taking the structure shown as an example, the color filter layer 20 includes three colors of filter color resist structures 23, so three times of preparation of the filter color resist layer and three times of second patterning treatment are required to obtain three different colors of filter color resist structures 23. An exemplary description will be given later.

[0112] Specifically, refer to Figure 4 and Figure 5 When the dimming color resist structure 21 only includes the second dimming sub-portion 211, the steps of forming the color filter layer 20 are specifically as follows: forming a light-shielding color resist layer on one side of the light-emitting substrate 10, and performing a first patterning process on the light-shielding color resist layer to obtain a light-shielding color resist structure 22; next, forming a filter color resist layer on the side of the light-shielding color resist structure 22 away from the light-emitting substrate 10, and performing a second patterning process on the filter color resist layer to simultaneously obtain a filter color resist structure 23 and a second dimming sub-portion 212 of the same color.

[0113] Specifically, refer to Figure 6 When the dimming color resist structure 21 includes both the first dimming section 211 and the second dimming section 212, the steps of forming the color filter layer 20 are specifically as follows: forming a light-shielding color resist layer on one side of the light-emitting substrate 10, and performing a first patterning process on the light-shielding color resist layer to simultaneously obtain the light-shielding color resist structure 22 and the first dimming section 211; next, forming a filter color resist layer on the side of the light-shielding color resist structure 22 away from the light-emitting substrate 10, and performing a second patterning process on the filter color resist layer to simultaneously obtain a filter color resist structure 23 and a second dimming section 212 of the same color.

[0114] For example, Figure 12-Figure 19 is a schematic diagram of a preparation process of a color filter layer in a display panel provided by an embodiment of the present invention. Figure 6 Taking the structure of the color filter layer shown in FIG. 1 as an example, the preparation process of the color filter layer is schematically described as follows:

[0115] The first step, such as Fig.12 As shown, a light-shielding color resist layer 220 is formed on one side of the light-emitting substrate 10, specifically on the thin film encapsulation layer 40. The light-shielding color resist layer 220 may be made of a black color resist.

[0116] The second step is, Fig.13 As shown, the light-shielding color resist layer 220 is subjected to a first patterning process to form a light-shielding color resist structure 22 and a first dimming sub-unit 211. The first patterning process is specifically exposure and development. Specifically, a metal mask is used to protect the portion of the light-shielding color resist layer that needs to be retained, and the exposed portion of the metal mask (i.e., the portion of the light-shielding color resist layer 220 that needs to be removed) is exposed and modified by an exposure process, and then removed by a developer, and the retained pattern is the light-shielding color resist structure 22 and the first dimming sub-unit 211.

[0117] The third step is Fig.14 As shown, a first color filter color resist layer 230 , such as a blue color resist layer 2310 , is formed on a side of the light-shielding color resist structure 22 away from the light-emitting substrate 10 .

[0118] The fourth step is Fig.15 As shown, the first color filter color resist layer 230 (such as the blue color resist layer 2310) is subjected to a second patterning process to form a first color filter color resist structure 23, such as a blue color resist structure 231. The second patterning process is specifically exposure and development, and the specific process can refer to the explanation of the first patterning process, which will not be repeated here.

[0119] Step 5: Fig.16 As shown, a second color filter color resist layer 230 , such as a red color resist layer 2320 , is formed on a side of the first color filter color resist structure 23 (such as the blue color resist structure 231 ) away from the light emitting substrate 10 .

[0120] Step 6: Fig.17 As shown, the second color filter color resist layer 230 (such as the red color resist layer 2320) is subjected to a second patterning process to form a second color filter color resist structure 23, such as a red color resist structure 232. At the same time, a red second dimming section 212 is also formed. The first dimming section 211 and the second dimming section 212 together constitute the dimming color resist structure 21, and the two are stacked along the thickness direction of the panel (i.e., the above-mentioned second direction).

[0121] Step 7: Fig.18 As shown, a third color filter color resist layer 230 , such as a green color resist layer 2330 , is formed on a side of the second color filter color resist structure 23 (such as the red color resist structure 232 ) away from the light emitting substrate 10 .

[0122] Step 8: Fig.19As shown, the third color filter color resist layer 230 (eg, green color resist layer 2330) is subjected to a second patterning process to form a third color filter color resist structure 23, such as a green color resist structure 233. At this point, the color filter layer is prepared.

[0123] It should be noted that Figure 12-Figure 19 In the preparation order of the light-shielding color-resist structure 22, the blue color-resist structure 231, the red color-resist structure 232 and the green color-resist structure 233, there is no unique order, and they can be replaced according to actual needs, which is not limited in the embodiment of the present invention. The preparation method of the other dimming color-resist structures can refer to Figure 12-Figure 19 The embodiment of the present invention is not limited to this.

[0124] Reference Fig.10 Before preparing the color filter layer 20, a thin film encapsulation layer 40 and a first planarization layer 80 and other film layers can be prepared on the light-emitting substrate 10. After the color filter layer 20 is prepared, the second planarization layer 50 and the first optical adhesive layer 60 can be prepared in sequence, and then a glass cover plate 70 is added, and finally the encapsulation adhesive 30 is filled and cured to obtain a display panel.

[0125] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Fig. 20 is a schematic diagram of the structure of a display device provided by an embodiment of the present invention, such as Fig. 20 As shown, the display device 200 includes the display panel 100 provided in any of the above embodiments, and thus has the same beneficial effects as the above display panel. The same points can be found in the description of the above embodiments, which will not be repeated here. The display device 200 may be an OLED display device. In addition, the display device 200 provided in the embodiment of the present invention may be Fig. 20 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0126] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: The display panel comprises: A light-emitting substrate; the light-emitting substrate comprises a light-emitting area and a non-light-emitting area located at least on one side of the light-emitting area; A color filter layer is located on one side of the light-emitting substrate; the color filter layer includes at least two dimming color-resist structures located in the non-light-emitting area, two adjacent dimming color-resist structures are arranged side by side along a first direction, and a first gap exists between any two adjacent dimming color-resist structures; the first direction is a direction from the non-light-emitting area to the light-emitting area; The packaging glue is located on a side of the color filter layer away from the light-emitting substrate and is located in the non-light-emitting area; the packaging glue covers the dimming color-resist structure and fills the first gap.

2. The display panel according to claim 1, characterized in that: The color filter layer further comprises a light-shielding color-resistance structure located in the light-emitting area and at least two light-filtering color-resistance structures of different colors, wherein the light-shielding color-resistance structure is located between any two adjacent light-filtering color-resistance structures; The dimming color-resist structure comprises a first dimming sub-section; the first dimming sub-section and the light-shielding color-resist structure are prepared in the same process; and / or, The dimming color-resist structure comprises a second dimming sub-section of at least one color; the second dimming sub-section and the filtering color-resist structure of the same color are prepared in the same process.

3. The display panel according to claim 2, characterized in that: The dimming color resist structure includes the first dimming section and the second dimming section, and the first dimming section and the second dimming section are stacked along a second direction; the second direction is perpendicular to the plane where the light-emitting substrate is located.

4. The display panel according to claim 1, characterized in that: The maximum width of the first gap in the first direction is less than 5 μm.

5. The display panel according to claim 1, characterized in that: The cross-sectional shape of the first gap on the first cross-section is at least one of a rectangle, a trapezoid and a triangle. The first cross-section is parallel to the first direction and perpendicular to the plane where the light-emitting substrate is located.

6. The display panel according to claim 1, characterized in that: The display panel further includes: A thin film encapsulation layer, located on a side of the light-emitting substrate close to the color filter layer and covering the light-emitting substrate; A first planarization layer, located between the color filter layer and the thin film encapsulation layer, covering the light-emitting area and at least a portion of the non-light-emitting area; A second planarization layer is located on a side of the color filter layer away from the light-emitting substrate and located in the light-emitting area; A first optical adhesive layer is located on a side of the second planarization layer away from the light-emitting substrate and located in the light-emitting area; The packaging glue includes a first surface and a second surface, the first surface is located on the side of the second surface away from the light-emitting substrate; the first optical glue layer includes a third surface and a fourth surface, the third surface is located on the side of the fourth surface away from the light-emitting substrate; the first surface is flush with the third surface.

7. The display panel according to claim 1, characterized in that: The non-luminescent area surrounds the luminescent area, and the orthographic projection shape of the dimming color resist structure on the luminescent substrate is a square or a ring.

8. A method for preparing a display panel, characterized in that: The preparation method comprises: forming a light-emitting substrate; the light-emitting substrate comprising a light-emitting area and a non-light-emitting area located at least on one side of the light-emitting area; A color filter layer is formed on one side of the light-emitting substrate; the color filter layer includes at least two dimming color resist structures located in the non-light-emitting area, two adjacent dimming color resist structures are arranged side by side along a first direction, and a first gap exists between any two adjacent dimming color resist structures; the first direction is a direction from the non-light-emitting area to the light-emitting area; A packaging glue is formed on a side of the color filter layer away from the light-emitting substrate; the packaging glue is located in the non-light-emitting area; the packaging glue covers the dimming color resistance structure and fills the first gap.

9. The preparation method according to claim 8, characterized in that: The dimming color-resist structure includes a first dimming section and / or a second dimming section of at least one color; and forming a color filter layer on one side of the light-emitting substrate includes: Forming a light-shielding color-resistance layer on one side of the light-emitting substrate, and performing a first patterning process on the light-shielding color-resistance layer to obtain a light-shielding color-resistance structure; A light filtering color resist layer is formed on a side of the light-shielding color resist structure away from the light-emitting substrate, and the light filtering color resist layer is subjected to a second patterning process to obtain a light filtering color resist structure; in the light-emitting area, the color filter layer includes at least two light filtering color resist structures of different colors, and the light-shielding color resist structure is located between any two adjacent light filtering color resist structures; Wherein, while obtaining the light-shielding color-resistance structure, the first dimming division is also obtained through the first patterning process; and / or, While obtaining the light filtering color resist structure, the second dimming section is also obtained through the second patterning process.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 7.

Images