Display panel and display device

Abstract

The invention discloses a display panel and a display device, the display panel comprises a substrate, a pixel driving layer, a pixel definition layer, a plurality of light emitting units, a packaging layer and a color filter layer, the pixel driving layer is arranged on the substrate; the pixel definition layer is arranged on the pixel driving layer; the plurality of light-emitting unit arrays are arranged on the pixel driving layer and are respectively positioned in the plurality of openings; the packaging layer is arranged on the light-emitting unit layer; the color filter layer is arranged on the packaging layer; wherein the packaging layer comprises an organic packaging layer, and a first groove is formed in the position, corresponding to the opening, of the organic packaging layer; the color filter layer comprises a plurality of color filter parts, and the color filter parts are arranged in the first grooves. By arranging the first groove, the flatness of the color filter part is improved, and the color purity and uniformity of all positions of the color filter part in the same opening are improved.

Description

Technical Field

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

[0002] With the continuous development of OLED (Organic Light-Emitting Diode) display technology, OLED is increasingly used in displays such as smartphones, tablets, computers, and televisions. OLED displays have the advantages of being thin and light, high contrast, fast response, wide viewing angle, high brightness, and full color. In order to reduce the reflectivity of external light in OLED displays, the current mainstream solution is to attach a circular polarizer to the light-emitting surface of the OLED display. However, this solution reduces the light-emitting effect due to the large light loss of the circular polarizer. Another solution is to set a color filter on the light-emitting surface of the OLED display to improve the light-emitting efficiency through the color filter. The effect of the reflection of ambient light in the OLED display can be reduced by setting a black matrix (BM), and the thickness of the entire display panel can also be reduced.

[0003] However, in the process of preparing the color filter on the display panel, due to the presence of the black matrix, the color filter part and its overlapping position are easily stacked to form a "bull horn" defect, causing problems such as uneven display. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device. The present application improves the flatness of the color filter portion by setting a first groove, reduces the differences in spectrum and brightness at different positions of the color filter portion due to the different thicknesses at the middle and edge positions of the color filter portion, and improves the color purity and uniformity of each position of the color filter portion within the same opening.

[0005] The present application discloses a display panel, comprising a base substrate, a pixel driving layer, a pixel definition layer, a plurality of light-emitting units, an encapsulation layer and a color filter layer, wherein the pixel driving layer is arranged on the base substrate; the pixel definition layer is arranged on the pixel driving layer, and a plurality of openings are formed; a plurality of light-emitting unit arrays are arranged on the pixel driving layer, and are respectively located in the plurality of the openings; the encapsulation layer is arranged on the light-emitting unit layer; the color filter layer is arranged on the encapsulation layer; wherein the encapsulation layer comprises an organic encapsulation layer, and a first groove is arranged on the organic encapsulation layer corresponding to the position of the opening; the color filter layer comprises a plurality of color filter portions, and the color filter portion is arranged in the first groove.

[0006] Optionally, the display panel also includes a black matrix, which is arranged on the encapsulation layer, and on the orthographic projection of the base substrate, the black matrix overlaps with the pixel definition layer; the encapsulation layer also includes a first inorganic layer, which is arranged on the organic encapsulation layer, and the second inorganic layer covers the first groove to form the second groove, and the color filter portion is arranged in the second groove.

[0007] Optionally, the depth of the second groove is equal to the thickness of the color filter; the surface of the color filter away from the base substrate is in the same plane as the surface of the first inorganic layer at a non-groove position away from the base substrate.

[0008] Optionally, on the orthographic projection of the base substrate, the black matrix and the color filter portion partially overlap.

[0009] Optionally, the depth of the second groove is less than the thickness of the color filter; the surface of the color filter away from the base substrate is higher than the surface of the first inorganic layer away from the base substrate at a non-groove position.

[0010] Optionally, on the orthographic projection of the base substrate, the black matrix partially overlaps with the color filter portion; a surface of the black matrix away from the base substrate is higher than a surface of the color filter portion away from the base substrate.

[0011] Optionally, a height difference between a surface of the color filter portion away from the base substrate and a surface of the first inorganic layer at a non-groove position away from the base substrate is less than or equal to 1 um.

[0012] Optionally, a radial width of the second groove is greater than or equal to a width of the opening area; and in an orthographic projection of the base substrate, the second groove partially overlaps with the pixel definition layer.

[0013] Optionally, the display panel also includes a overhang structure, which is arranged on the pixel definition layer and is used to separate two adjacent light-emitting units; the encapsulation layer also includes a second inorganic layer, which covers the light-emitting unit and is located under the organic encapsulation layer; the color filter portion includes a red filter portion, a green filter portion and a blue filter portion.

[0014] The present application discloses a display device, comprising a driving circuit and the above-mentioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] The present application arranges the color filter part in the first groove by setting the first groove in the organic encapsulation layer, and the first groove is located at the opening position. When the black matrix is ​​formed, there will be no "bull horn" defect in the color filter part caused by the black matrix. In addition, by setting the first groove, the flatness of the color filter part is improved, and the difference in spectrum and brightness at different positions of the color filter part caused by the different thicknesses at the middle and edge positions of the color filter part is reduced, thereby improving the color purity and uniformity of each position of the color filter part in the same opening. The display effect under a wide viewing angle is improved and the color separation phenomenon caused by the reflection of ambient light by the display panel is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application;

[0018] Figure 2 yes Figure 1 Schematic diagram of the cross section along the cutting line AA;

[0019] Figure 3 is a schematic diagram of a display panel according to a second embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a display panel according to a third embodiment of the present application;

[0021] Figure 5 is a schematic diagram of another display panel according to the third embodiment of the present application;

[0022] Figure 6 is a schematic diagram of another display panel according to the third embodiment of the present application;

[0023] Figure 7 is a schematic diagram of a display device of the present application.

[0024] Among them, 100, display panel; 101, opening area; 102, non-opening area; 110, base substrate; 111, pixel driving layer; 112, pixel definition layer; 113, light-emitting unit; 120, encapsulation layer; 121, first inorganic layer; 122, organic encapsulation layer; 123, second inorganic layer; 124, first groove; 125, second groove; 130, color filter layer; 131, color filter part; 132, black matrix; 140, overhang structure; 141, conductive layer; 142, insulating layer; 200, display device; 210, driving circuit. DETAILED DESCRIPTION

[0025] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0026] In the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "multiple" means two or more. In addition, the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. indicating orientation or positional relationships are described based on the orientation or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the simplified description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0027] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0028] Figure 1 is a schematic diagram of a display panel according to a first embodiment of the present application, Figure 2 yes Figure 1 Schematic diagram of the cross section along the cutting line AA, see Figure 1-2As shown, the present application discloses a display panel 100, which includes a base substrate 110, a pixel driving layer 111, a pixel definition layer 112, a plurality of light-emitting units 113, an encapsulation layer 120 and a color filter layer 130; the pixel driving layer 111 is arranged on the base substrate 110, the pixel definition layer 112 is arranged on the pixel driving layer 111, and a plurality of openings are formed; a plurality of light-emitting units 113 are arranged in an array on the pixel driving layer 111, and are respectively located in the plurality of openings, the encapsulation layer 120 is arranged on the light-emitting unit 113 layer; the color filter layer 130 is arranged on the encapsulation layer 120; wherein the encapsulation layer 120 includes an organic encapsulation layer 122, and a first groove 124 is arranged on the organic encapsulation layer 122 at a position corresponding to the opening; the color filter layer 130 includes a plurality of color filter portions 131, and the color filter portions 131 are arranged in the first groove 124.

[0029] The present application arranges the color filter 131 in the first groove 124 by setting the first groove 124 in the organic encapsulation layer 122, and the first groove 124 is located at the opening position. When the black matrix 132 is formed, there will be no "bull horn" defect in the color filter 131 caused by the black matrix 132. Moreover, by setting the first groove 124, the flatness of the color filter 131 is improved, and the difference in spectrum and brightness at different positions of the color filter 131 caused by the different thicknesses at the middle and edge positions of the color filter 131 is reduced, thereby improving the color purity and uniformity of each position of the color filter 131 in the same opening. The display effect under a wide viewing angle is improved and the color separation phenomenon caused by the reflection of ambient light by the display panel 100 is reduced.

[0030] Specifically, in the process of forming the color filter 131 after manufacturing the black matrix 132 of the display panel 100, since the black matrix 132 has a certain thickness, the overlapping position of the color filter 131 and the black matrix 132 is prone to form a "bull horn", that is, the film layer of the color filter 131 is uneven, especially at the edge position of the black matrix 132, the upper surface of the color filter 131 will have obvious protrusions, resulting in an uneven film layer on the upper surface of the color filter 131. The present application forms a relatively flat surface below the color filter 131 by moving the position of the color filter 131 downward and providing a first groove 124 on the organic encapsulation layer 122. When the color filter 131 is formed, it will not be affected by the black matrix 132, and will no longer form a stacked "bull horn" defect with the black matrix 132.

[0031] Specifically, the pixel driving layer 111 is provided with a pixel driving circuit for driving the light emitting unit 113, including a thin film transistor, a data driving line, a scanning line, etc., which are formed by multiple metal film layers and insulating film layers. A flat layer is generally provided on the pixel driving layer 111, and the subsequent light emitting unit 113 and the pixel definition layer 112 are respectively provided on the flat layer.

[0032] Specifically, the pixel definition layer 112 is formed with multiple openings, and the location of the openings is also called the opening area 101. The location where the pixel definition layer 112 is set is called the non-opening area 102. The light-emitting unit 113 is set in the opening area 101, and two adjacent light-emitting units 113 are separated by the pixel definition layer 112.

[0033] Specifically, the encapsulation layer 120 covers the light-emitting unit 113 and the pixel definition layer 112, and is used to encapsulate the light-emitting unit 113 to prevent external water vapor from entering. The encapsulation layer 120 in this embodiment adopts thin film encapsulation technology, that is, a stack formed by multiple layers of inorganic materials and organic materials. Among them, the organic encapsulation layer 122 is formed of organic materials, and the encapsulation layer 120 also includes a first inorganic layer 121, the first inorganic layer 121 is arranged on the organic encapsulation layer 122, the second inorganic layer 123 covers the first groove 124 to form the second groove 125, and the color filter part 131 is arranged in the second groove 125. The first inorganic layer 121 is formed of inorganic materials, and the thickness of the first inorganic layer 121 is generally much smaller than the thickness of the organic encapsulation layer 122.

[0034] In this embodiment, by forming the first groove 124 on the organic encapsulation layer 122, when forming the first inorganic layer 121, the second groove 125 is formed at a position corresponding to the first groove 124, and the color filter 131 is disposed in the second groove 125. Relatively speaking, the film thickness of the organic encapsulation layer 122 is relatively thick, and the first groove 124 with a greater depth can be formed on the organic encapsulation layer 122 to accommodate the color filter 131.

[0035] In this embodiment, the encapsulation layer 120 can be encapsulated in a three-layer stacking manner, and the encapsulation layer 120 includes a first inorganic layer 121, an organic encapsulation layer 122, and a second inorganic layer 123. The second inorganic layer 123 covers the light-emitting unit 113 and is located under the organic encapsulation layer 122. The organic encapsulation layer 122 is arranged on the second inorganic layer 123, and the first inorganic layer 121 is arranged on the organic encapsulation layer 122. The color filter layer 130 is directly in contact with the second inorganic layer 123. It is worth mentioning that in this embodiment, by forming the first groove 124 on the organic encapsulation layer 122, the organic encapsulation layer 122 has a relatively small impact on the organic encapsulation layer 122 because the thickness of the organic encapsulation layer 122 is relatively thick.

[0036] Specifically, the display panel 100 further includes a black matrix 132, which is disposed on the encapsulation layer 120, specifically on the first inorganic layer 121, and overlaps with the pixel definition layer 112 on the orthographic projection of the base substrate 110. The main function of the black matrix 132 is to prevent ambient light from entering the display panel 100 to cause light reflection problems, and to isolate adjacent color filter portions 131 to prevent light crosstalk problems.

[0037] The black matrix 132 of this embodiment is mainly disposed in the non-opening area 102, that is, disposed on the first inorganic layer 121 at a position other than the first groove 124. In the specific process, after forming the first inorganic layer 121, the color filter 131 can be formed first and then the black matrix 132 can be formed, thereby avoiding defects of the color filter 131 caused by forming the black matrix 132 first.

[0038] Specifically, the thickness of the organic encapsulation layer 122 in the first groove 124 region is less than the thickness of the organic encapsulation in the non-first groove 124 region, and the depth of the first groove 124 generally needs to be greater than or equal to the thickness of the color filter layer 130 or the color filter portion 131. It can be understood that, in general, the depth of the first groove 124 is equal to the depth of the second groove 125, and when the difference between the film thickness of the first inorganic layer 121 in the first groove 124 and the film thickness outside the first groove 124 is not considered, it is generally considered that the depth of the first groove 124 is equal to the depth of the second groove 125.

[0039] When the thickness of the organic encapsulation layer 122 is sufficient, the depth of the first groove 124 can be set to be slightly greater than the thickness of the color filter 131, so that after the color filter 131 is formed, the surface of the color filter 131 away from the base substrate 110 is slightly lower than the first inorganic layer 121, so that there is more selectivity in the process of forming the black matrix 132. For example, the black matrix 132 can be formed first, the black matrix 132 material is first deposited on the entire surface, and the black matrix 132 material is also formed at the position of the second groove 125. The black matrix 132 material in the second groove 125 is removed by etching, and then the color filter 131 in the second groove 125 is formed. This method has little effect even if a small amount of black matrix 132 material remains on the side of the second groove 125. For another example, the color filter 131 material can be formed in the second groove 125 first, and then the black matrix 132 is formed. Before forming the black matrix 132 material, a protection layer may be formed on the color filter portion 131 to prevent the color filter portion 131 from being affected by etching the black matrix 132 material.

[0040] In the present application, the surface of each film layer away from the base substrate 110 is called the upper surface, and the surface of each film layer close to the base substrate 110 is called the lower surface. In the following description, the upper surface and the lower surface are used instead of each other.

[0041] Figure 3 is a schematic diagram of a display panel of the second embodiment of the present application, see Figure 3 As shown, considering that the film thickness of the color filter portion 131 is relatively thick in practice, while the thickness of the organic encapsulation layer 122 is limited, in one embodiment, the depth of the second groove 125 is equal to the thickness of the color filter portion 131; the surface of the color filter portion 131 away from the base substrate 110 and the surface of the first inorganic layer 121 at the non-groove position away from the base substrate 110 are in the same plane. That is, the upper surface of the color filter portion 131 and the upper surface of the first inorganic layer 121 are in the same plane.

[0042] In this embodiment, the depth of the second groove 125 is improved so that the depth of the second groove 125 just matches the thickness of the color filter 131, so that the upper surface of the color filter 131 and the upper surface of the first inorganic layer 121 are in the same plane, and the flatness of the color filter 131 is improved. In the process of forming the color filter 131, the color filter 131 at the position other than the first groove 124 needs to be etched away. By setting the thickness of the color filter 131 to be less than or equal to the depth of the second groove 125 (also referred to as the depth of the first groove 124), the slope of the color filter 131 on the side wall of the second groove 125 is small and it is easy to be etched away. In this way, the thickness at the edge of the color filter 131 is more consistent with the thickness at the center of the color filter 131, so that the thickness of the light passing through each position of the color filter 131 is more consistent, so that the spectrum and brightness at each position are more uniform, and the color purity and uniformity of the display are guaranteed. Moreover, the surface of the color filter portion 131 is made smoother, which can reduce light scattering and reflection caused by the uneven surface.

[0043] In a specific embodiment, the color filter portion 131 includes a red filter portion R, a green filter portion G and a blue filter portion B. An adjacent red filter portion, a green filter portion and a blue filter portion constitute three sub-pixels in a pixel. The red filter portion corresponds to the red sub-pixel, the green filter portion corresponds to the green sub-pixel, and the blue filter portion corresponds to the blue sub-pixel.

[0044] When the thickness of the color filter portions 131 of different colors is different, the thickness of the corresponding first groove 124 set on the organic encapsulation layer 122 is also different. For example, when the thickness of the red filter portion is the thickest and the thickness of the blue filter portion is the thinnest, by setting a thicker first groove 124 at the corresponding position of the red filter portion, setting a thinner first groove 124 at the corresponding position of the blue filter portion, and setting a first groove 124 of intermediate thickness at the corresponding position of the green filter portion, the upper surface of the red filter portion, the upper surface of the blue filter portion, and the upper surface of the green filter portion are in the same plane as the upper surface of the first inorganic layer 121.

[0045] Furthermore, considering the influence of the sidewall of the second groove 125, when the color filter 131 material is formed on the entire surface, a film layer with a certain slope is also formed on the sidewall of the second groove 125, extending from the second groove 125 to the non-second groove 125. Therefore, in this embodiment, on the orthographic projection of the base substrate 110, the black matrix 132 partially overlaps with the color filter 131.

[0046] By widening the width of the black matrix 132 and overlapping the film layer at the edge of the color filter 131, the uneven film layer at the edge of the color filter 131 is shielded to prevent the film layer from being used for display, thereby avoiding poor display effect caused by the uneven film layer.

[0047] Specifically, the width of the second groove 125 is greater than or equal to the width of the opening area 101, so that the width of the color filter 131 is also greater than the width of the opening area 101. The transition position where the film layer of the color filter 131 changes is not located in the opening area 101, so as to improve the display effect without reducing the pixel opening.

[0048] Specifically, the overlapping width of the black matrix 132 and the color filter 131 should not exceed the position of the non-opening area 102. Specifically, the widest position of the black matrix 132 does not overlap with the effective light-emitting area of ​​the light-emitting unit 113, so that the black matrix 132 does not affect the opening size of the sub-pixel.

[0049] Figure 4 is a schematic diagram of a display panel of the third embodiment of the present application, see Figure 4As shown, the present application also discloses a display panel 100, which includes a base substrate 110, a pixel driving layer 111, a pixel definition layer 112, a plurality of light-emitting units 113, an encapsulation layer 120 and a color filter layer 130; the pixel driving layer 111 is arranged on the base substrate 110, the pixel definition layer 112 is arranged on the pixel driving layer 111, and a plurality of openings are formed; a plurality of light-emitting units 113 are arranged in an array on the pixel driving layer 111, and are respectively located in the plurality of openings, the encapsulation layer 120 is arranged on the light-emitting unit 113 layer; the color filter layer 130 is arranged on the encapsulation layer 120; wherein the encapsulation layer 120 includes an organic encapsulation layer 122, and a first groove 124 is arranged on the organic encapsulation layer 122 at a position corresponding to the opening; the color filter layer 130 includes a plurality of color filter portions 131, and the color filter portions 131 are arranged in the first groove 124.

[0050] In this embodiment, due to the insufficient thickness of the organic encapsulation layer 122, the depth of the second groove 125 is limited, so that the upper surface of the color filter portion 131 is higher than the upper surface of the first inorganic layer 121. For example, the display panel 100 is a display panel 100 formed by a maskless evaporation technology. Since the overhang structure 140 occupies the space of the non-opening area 102, if the first groove 124 is formed on the organic encapsulation layer 122, since the width of the first groove 124 will be greater than the width of the opening area 101, it will also occupy part of the space of the non-opening area 102, resulting in the depth of the first groove 124 cannot be too deep, resulting in the upper surface of the color filter portion 131 being slightly higher than the upper surface of the first inorganic layer 121.

[0051] Specifically, the display panel 100 further includes a suspension structure 140, and the suspension structure 140 is disposed on the pixel definition layer 112 to separate two adjacent light-emitting units 113. The light-emitting unit 113 generally includes a bottom electrode, a light-emitting functional layer and a top electrode. The suspension structure 140 generally includes a conductive layer 141 and an insulating layer 142. In the non-opening area 102, the width of the insulating layer 142 is greater than the width of the conductive layer 141, so that when the light-emitting unit 113 is subjected to full-surface vapor deposition, the light-emitting functional layer of the light-emitting unit 113 cannot be formed under the insulating layer 142 due to the shielding of the insulating layer 142, and is not connected to the light-emitting functional layer of the adjacent light-emitting unit 113, and is also not connected to the redundant light-emitting functional layer on the suspension structure 140.

[0052] Specifically, the depth of the second groove 125 is less than the thickness of the color filter 131 ; the surface of the color filter 131 away from the base substrate 110 is higher than the surface of the first inorganic layer 121 away from the base substrate 110 at the non-groove position.

[0053] In this embodiment, by changing the thickness of the color filter portion 131, the upper surface of the color filter portion 131 is slightly higher than the upper surface height of the first inorganic layer 121, so that at the side wall position of the second groove 125, even if there is a height change in the upper surface of the color filter portion 131, less planarization material is used to planarize the color filter layer 130 in the subsequent etching process. Relatively speaking, the solution of this embodiment is more suitable for when the color filter portions 131 of different colors are different and it is impossible to make the upper surfaces of multiple color filter portions 131 flush, then the upper surface of the color filter portion 131 can be made slightly higher than the upper surface of the first inorganic layer 121.

[0054] Specifically, on the orthographic projection of the base substrate 110 , the black matrix 132 partially overlaps with the color filter 131 ; the surface of the black matrix 132 away from the base substrate 110 is higher than the surface of the color filter 131 away from the base substrate 110 .

[0055] In this embodiment, the black matrix 132 overlaps with the film layer of the color filter portion 131 at the edge position, so as to shield the uneven film layer at the edge of the color filter portion 131, prevent the film layer of this part from being used for display, and avoid poor display effect caused by uneven film layer. In addition, the upper surface height of the color filter portion 131 should be lower than the upper surface height of the black matrix 132.

[0056] Specifically, a height difference between a surface of the color filter portion 131 away from the base substrate 110 and a surface of the first inorganic layer 121 at a non-groove position away from the base substrate 110 is less than or equal to 1 um.

[0057] In this embodiment, the height of the color filter portion 131 is slightly higher than the upper surface height of the non-opening area 102 where the first inorganic layer 121 is located, so that the color filter portion 131 will not have a large range of height changes at the edge, especially a color filter portion with a gradually changing thickness will appear on the side wall of the second groove. By setting the thickness of the color filter portion to exceed the depth of the second groove, when part of the color filter portion material is subsequently removed, the part of the color filter portion material with a changing thickness that extends to the non-display area will be removed.

[0058] Furthermore, considering the influence of the sidewall of the second groove 125, when the color filter 131 material is formed on the entire surface, a film layer with a certain slope will also be formed on the sidewall of the second groove 125, extending from the second groove 125 to the non-second groove 125. Therefore, in this embodiment, the sidewalls of the first groove 124 and the second groove 125 can also be set to a multi-step shape. In this regard, the embodiment of the present application can reduce the slope of the sidewall of the second groove.

[0059] Figure 5 is a schematic diagram of another display panel of the third embodiment of the present application, Figure 6 is a schematic diagram of another display panel of the third embodiment of the present application, see Figures 5 and 6 As shown, through photolithography or embossing technology, the side wall of the second groove is set to have a gradually changing slope, and the area with the gradually changing slope is located in the non-opening area. The specific slope of the side wall of the second groove is between 30 degrees and 80 degrees, so that the film layer of the color filter part changes more smoothly at the transition position from the second groove to the non-groove area, avoiding a large change in the film layer of the color filter part. Figure 6 As shown, multiple layers of stepped surfaces can also be provided to achieve the same purpose, that is, to make the color filter portion gradually rise on the side wall of the second groove. It is worth mentioning that, ideally, Figure 4 The schematic diagram shown in the ideal situation shows that when the color filter is photolithographically formed, all the color of the color filter in the non-groove area is removed. However, due to the influence of the side wall of the second groove, the color filter begins to change its film layer at a position close to the side wall of the second groove, and the greater the slope of the side wall of the second groove, the steeper the film layer change at this position, resulting in the film layer of the color filter at the edge of the second groove still being unsatisfactory. Therefore, in this embodiment, the side wall of the second groove is further improved so that the film layer of the color filter gradually changes from the second groove to the non-groove area, and the film layer change position is moved to the non-groove area. In the subsequent black matrix manufacturing process, the black matrix is ​​used to block the outgoing light in this part of the area, thereby improving the display effect of the display panel.

[0060] Specifically, in the process of forming the first groove 124 in the organic encapsulation layer 122, the first groove 124 can be formed by etching on the one hand, or by mold stamping on the other hand. For etching, a half-tone mask technology is required to form a plurality of first grooves 124 in the organic encapsulation layer 122. For the mold stamping technology, stamping templates of different thicknesses can be used to make the plurality of first grooves 124 have different depths to meet the different thickness requirements of the color filter portions 131 of different colors.

[0061] Specifically, the manufacturing method of the display panel 100 of the present application includes providing a base substrate 110, forming a pixel driving layer 111 on the base substrate 110, forming a pixel definition layer 112 on the pixel driving layer 111, using a patterning process for the pixel definition layer 112, forming a plurality of openings at the location of the light-emitting unit 113, retaining the pixel definition layer 112 in the non-opening area 102, forming a suspension structure 140 on the pixel definition layer 112, forming a plurality of light-emitting units 113 using the suspension structure 140, and separating two adjacent light-emitting units 113 by the suspension structure 140. After the light-emitting unit 113 process is completed, the encapsulation layer 120 is formed, and in the process of forming the organic encapsulation layer 122, a plurality of first grooves 124 are formed in the opening area 101, and after the first inorganic layer 121 is formed, the first inorganic layer 121 covers the first grooves 124 to form a plurality of second grooves 125. After the encapsulation layer 120 is processed, the color filter layer 130 is processed, and the color filter portion 131 is formed in the plurality of second grooves 125 and then the black matrix 132 is formed. Subsequently, other film layers or other modules are attached to complete the display panel 100 process.

[0062] Figure 7 is a schematic diagram of the display device of the present application, see Figure 7 As shown, the present application further discloses a display device, wherein the display device 200 includes a driving circuit 210 and a display panel 100 in any of the above embodiments, wherein the driving circuit 210 is used to drive the display panel 100 to display.

[0063] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0064] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, characterized in that: include: substrate substrate; A pixel driving layer is arranged on the base substrate; A pixel definition layer, disposed on the pixel driving layer, and formed with a plurality of openings; A plurality of light-emitting units are arranged in an array on the pixel driving layer and are respectively located in the plurality of the openings; An encapsulation layer, disposed on the light-emitting unit layer; as well as A color filter layer, disposed on the encapsulation layer; The encapsulation layer includes an organic encapsulation layer, and a first groove is arranged on the organic encapsulation layer at a position corresponding to the opening; the color filter layer includes a plurality of color filter parts, and the color filter parts are arranged in the first groove.

2. The display panel according to claim 1, characterized in that: The display panel further includes a black matrix, which is disposed on the encapsulation layer, and in the orthographic projection of the base substrate, the black matrix overlaps with the pixel definition layer; The encapsulation layer further includes a first inorganic layer, the first inorganic layer is disposed on the organic encapsulation layer, the second inorganic layer covers the first groove to form the second groove, and the color filter portion is disposed in the second groove.

3. The display panel according to claim 2, characterized in that: The depth of the second groove is equal to the thickness of the color filter portion; The surface of the color filter portion away from the base substrate is in the same plane as the surface of the first inorganic layer at the non-groove position away from the base substrate.

4. The display panel according to claim 3, characterized in that: On the orthographic projection of the base substrate, the black matrix partially overlaps with the color filter portion.

5. The display panel according to claim 2, characterized in that: The depth of the second groove is smaller than the thickness of the color filter portion; A surface of the color filter portion away from the base substrate is higher than a surface of the first inorganic layer at a non-groove position away from the base substrate.

6. The display panel according to claim 5, characterized in that: On the orthographic projection of the base substrate, the black matrix partially overlaps with the color filter portion; A surface of the black matrix away from the base substrate is higher than a surface of the color filter away from the base substrate.

7. The display panel according to claim 5, characterized in that: A height difference between a surface of the color filter portion away from the base substrate and a surface of the first inorganic layer at a non-groove position away from the base substrate is less than or equal to 1 um.

8. The display panel according to claim 5, characterized in that: The radial width of the second groove is greater than or equal to the width of the opening area; On the orthographic projection of the base substrate, the second groove partially overlaps with the pixel definition layer.

9. The display panel according to claim 2, characterized in that: The display panel further comprises a suspension structure, which is arranged on the pixel definition layer and is used to separate two adjacent light-emitting units; The encapsulation layer further includes a second inorganic layer, which covers the light-emitting unit and is located under the organic encapsulation layer; The color filter portion includes a red filter portion, a green filter portion and a blue filter portion.

10. A display device, characterized in that: It comprises a driving circuit and the display panel according to any one of claims 1 to 9, wherein the driving circuit is used to drive the display panel to display.

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