Display panel

Abstract

A display panel comprises: a substrate (110, 1110); a plurality of sub-pixels (R, G, B) arranged on one side of the substrate (110, 1110); an encapsulation layer (120) located on a side of the plurality of sub-pixels (R, G, B) away from the substrate and covering the plurality of sub-pixels (R, G, B); a light shielding layer (130) located on a side of the encapsulation layer (120) away from the substrate (110, 1110), the light shielding layer (130) being provided with a plurality of openings respectively corresponding to the plurality of sub-pixels (R, G, B); a first color filter layer (140) comprising a plurality of basic units, the plurality of basic units respectively covering the plurality of openings in the light shielding layer (130); and a second color filter layer (150) located on a side of the first color filter layer away from the substrate, the second color filter layer comprising a plurality of stacked units, the plurality of stacked units respectively covering the edge of at least one of the plurality of basic units, wherein the basic units and the stacked units covering the basic units have different colors.

Description

Technical Field

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

[0002] Color Film on Encapsulation (COE) technology replaces polarizers with color film and black matrix on the encapsulation layer. However, when a display panel manufactured using this technology is turned off and exposed to ambient light, color separation can occur, resulting in the appearance of color fringes on the display panel. Summary of the Invention

[0003] According to one aspect of the present disclosure, there is provided a display panel, comprising:

[0004] substrate,

[0005] A plurality of sub-pixels are arranged on one side of the substrate;

[0006] an encapsulation layer, located on a side of the plurality of sub-pixels away from the substrate and covering the plurality of sub-pixels;

[0007] a light shielding layer, located on a side of the encapsulation layer away from the substrate, wherein the light shielding layer is provided with a plurality of openings corresponding to the plurality of sub-pixels respectively;

[0008] A first color filter layer includes a plurality of basic units, wherein the plurality of basic units respectively cover the plurality of openings in the light shielding layer; and

[0009] The second color filter layer is located on a side of the first color filter layer away from the substrate, and the second color filter layer includes a plurality of stacked units, each of which covers an edge of at least one basic unit among the plurality of basic units, wherein the basic unit has a different color from the stacked unit covering the basic unit.

[0010] For example, the plurality of basic units include at least one red basic unit, at least one green basic unit, and at least one blue basic unit, and the plurality of stacking units include at least one first blue stacking unit corresponding one-to-one to the at least one red basic unit and at least one second blue stacking unit corresponding one-to-one to the at least one green basic unit, wherein,

[0011] At least a portion of an edge of the red basic unit is covered by the corresponding first blue stacking unit; and

[0012] At least a portion of an edge of the green basic unit is covered by the corresponding second blue stacked unit.

[0013] For example, the projection of the red basic unit on the substrate is a polygon, the red basic unit includes a plurality of edges connected in sequence, and two edges of the plurality of edges are parallel to each other;

[0014] The first blue stacking unit includes a first blue sub-unit and a second blue sub-unit, and the first blue stacking unit covers two edges of the red basic unit that are parallel to each other.

[0015] For example, the projection of the red basic unit on the substrate is a hexagon, and the red basic unit has a first edge, a second edge, a third edge, a fourth edge, a fifth edge, and a sixth edge connected in sequence, wherein the first edge and the fourth edge are parallel to each other and have a first length, and the second edge, the third edge, the fifth edge, and the sixth edge have a second length that is less than the first length;

[0016] The first blue stacking unit includes a first blue sub-unit and a second blue sub-unit. The first blue sub-unit covers a first edge of the red basic unit, and the second blue sub-unit covers a fourth edge of the red basic unit.

[0017] For example, the multiple stacking units also include at least one green stacking unit corresponding one-to-one to the at least one red basic unit, wherein the green stacking unit includes a first green stacking unit and a second green stacking unit, the first green stacking unit covers the second edge and the third edge of the red basic unit, and the second green stacking unit covers the fifth edge and the sixth edge of the red basic unit.

[0018] For example, the first blue subunit is in a strip shape and extends along the first edge of the red basic unit, and at least a portion of the first blue subunit covers the first edge of the red basic unit;

[0019] The second blue sub-unit extends in a strip shape along the fourth edge of the red basic unit, and at least a portion of the second blue sub-unit covers the fourth edge of the red basic unit.

[0020] For example, the width of the first blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of the portion of the first blue subunit covering the red basic unit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm;

[0021] The width of the second blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of the portion of the second blue subunit covering the red basic unit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm.

[0022] For example, the green basic unit includes a first green sub-section and a second green sub-section, the projections of the first green sub-section and the second green sub-section on the substrate are both pentagonal, and the first green sub-section and the second green sub-section each have a first edge, a second edge, a third edge, a fourth edge, and a fifth edge connected in sequence,

[0023] The second blue stacking unit includes a third blue subunit and a fourth blue subunit, the third blue subunit covers at least one of the first edge, second edge, third edge, fourth edge and fifth edge of the first green subpart, and the fourth blue subunit covers at least one of the first edge, second edge, third edge, fourth edge and fifth edge of the second green subpart.

[0024] For example, in each of the first green sub-portion and the second green sub-portion, the first edge and the third edge are parallel, the second edge is perpendicular to the first edge and the third edge, and the angle between the fourth edge and the third edge is equal to the angle between the fifth edge and the first edge;

[0025] The first green sub-segment and the second green sub-segment are mirror images of each other, so that the second edge of the first green sub-segment is adjacent to the second edge of the second sub-segment, the third edge, the fourth edge, and the fifth edge of the first green sub-segment are located on a side of the second edge of the first green sub-segment away from the second green sub-segment, and the third edge, the fourth edge, and the fifth edge of the second green sub-segment are located on a side of the second edge of the second green sub-segment away from the first green sub-segment; and

[0026] The third blue subunit covers the first edge, the second edge, the third edge and the fifth edge of the first green subunit, and the fourth blue subunit covers the first edge, the second edge, the third edge and the fourth edge of the second green subunit.

[0027] For example, the multiple stacking units also include at least one red stacking unit corresponding one-to-one to the at least one green basic unit, wherein the red stacking unit includes a first red stacking unit and a second red stacking unit, the first red stacking unit covers the fourth edge of the first green sub-portion of the green basic unit, and the second red stacking unit covers the fifth edge of the second green sub-portion of the green basic unit.

[0028] For example, the third blue subunit extends in a strip shape along the first edge, the second edge, the third edge and the fifth edge of the first green subunit, and at least a portion of the third blue subunit covers the first edge, the second edge, the third edge and the fifth edge of the first green subunit;

[0029] The fourth blue subunit extends in a strip shape along the first, second, third and fourth edges of the second green subunit, and at least a portion of the fourth blue subunit covers the first, second, third and fourth edges of the second green subunit.

[0030] For example, the width of the third blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of the portion of the third blue subunit covering the first green subunit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm;

[0031] The width of the fourth blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of a portion of the fourth blue subunit covering the second green subunit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm.

[0032] For example, the blue basic unit is not covered by any stacking unit.

[0033] For example, a portion of the stacking unit covers an edge of the basic unit, and another portion of the stacking unit contacts a surface of the light shielding layer that is away from the substrate.

[0034] For example, the plurality of sub-pixels are divided into a plurality of pixel units, the plurality of pixel units are arranged in an array, each pixel unit includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, wherein,

[0035] The red subunit is located on a side of the red subpixel away from the substrate, the green subunit is located on a side of the green subpixel away from the substrate, and the blue subunit is located on a side of the blue subpixel away from the substrate.

[0036] For example, the green sub-pixel includes a first green sub-pixel and a second green sub-pixel, and the green basic unit includes a first green sub-portion and a second green sub-portion, wherein:

[0037] The first green sub-portion is located on a side of the first green sub-pixel away from the substrate, and the second green sub-portion is located on a side of the second green sub-pixel away from the substrate.

[0038] For example, the plurality of pixel units include at least one first pixel unit and at least one second pixel unit, wherein:

[0039] In the first pixel unit, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are arranged along a first direction, and the green sub-pixel and the red sub-pixel are respectively located on both sides of the blue sub-pixel in the first direction, and the first green sub-pixel and the second green sub-pixel are arranged along a second direction, wherein the first direction is a row direction of the array, and the second direction is a column direction of the array;

[0040] In the second pixel unit, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are arranged along a first direction, and the blue sub-pixel and the green sub-pixel are respectively located on both sides of the red sub-pixel in the first direction, wherein the first green sub-pixel and the second green sub-pixel of the green sub-pixel are arranged along a second direction; and

[0041] The pixel units located in the same row are all one of the first pixel unit and the second pixel unit, and any two adjacent pixel units in the pixel units located in the same column are respectively the first pixel unit and the second pixel unit.

[0042] For example, the display panel further includes a cover plate, and the cover plate is located on a side of the second layer away from the substrate.

[0043] For example, the display panel further includes a touch layer, and the touch layer is located between the encapsulation layer and the light shielding layer.

[0044] For example, at least one of the plurality of sub-pixels includes:

[0045] a pixel driving circuit, located on a side of the substrate facing the light shielding layer;

[0046] a planarization layer, located on a side of the pixel driving circuit away from the substrate;

[0047] an anode, located on a side of the planarization layer away from the substrate and connected to a pixel driving circuit through a via hole in the planarization layer;

[0048] a pixel defining layer, located on a side of the planarization layer away from the substrate and covering an edge of the anode;

[0049] a light-emitting layer, located on a side of the anode away from the substrate;

[0050] The cathode is located on a side of the light-emitting layer away from the substrate, and the encapsulation layer is located on a side of the cathode away from the substrate.

[0051] According to another aspect of the present disclosure, a mask plate is provided for manufacturing the display panel described above, wherein the mask plate includes a plurality of mask units arranged in an array, each mask unit including a plurality of light-transmitting regions and opaque regions located between the light-transmitting regions, wherein the plurality of light-transmitting regions of each mask unit include:

[0052] The basic light-transmitting area is used to form a basic unit of a preset color in the first color filter layer;

[0053] The laminated light-transmitting area is used to form a laminated unit of the preset color in the second color filter layer.

[0054] For example, the basic light-transmitting area is used to form a blue basic unit in the first color filter layer;

[0055] The stacked light-transmitting area includes a first stacked light-transmitting area and a second stacked light-transmitting area, which are respectively used to form a first blue stacked unit and a second blue stacked unit in the second color filter layer.

[0056] For example, the substantially light-transmitting area has a hexagonal shape;

[0057] The first stacked light-transmitting region includes a first strip portion and a second strip portion that are parallel to each other;

[0058] The second stacked light-transmitting region includes a third strip portion and a fourth strip portion, each of the third strip portion and the fourth strip portion having a first sub-portion, a second sub-portion, a third sub-portion and a fourth sub-portion connected in sequence,

[0059] The first subsection and the third subsection are parallel to each other, the second subsection is perpendicular to the first subsection and the third subsection, the fourth subsection is inclined at a preset angle relative to the third subsection, and the fourth subsection is separated from the first subsection;

[0060] The projection of the third strip portion on the substrate has a first pattern in the form of an open ring, and the projection of the fourth strip portion on the substrate has a second pattern in the form of an open ring, wherein the second pattern is a flipped pattern of the first pattern along a first direction and a second direction, wherein the first direction is the row direction of the array and the second direction is the column direction of the array.

[0061] For example, in at least one mask unit, the first stacked light-transmitting region and the second stacked light-transmitting region are respectively located on both sides of the basic light-transmitting region along a first direction, wherein the first direction is a row direction of the array;

[0062] In at least one other mask unit adjacent to the at least one mask unit in the second direction, the basic light-transmitting area and the second stacked light-transmitting area are respectively located on both sides of the first stacked light-transmitting area along the first direction, wherein the second direction is the column direction of the array.

[0063] For example, the basic light-transmitting area is used to form a green basic unit in the first color filter layer;

[0064] The laminated light-transmitting area is used to form a green laminated unit in the second color filter layer.

[0065] For example, the basic light-transmitting area is used to form a red basic unit in the first color filter layer;

[0066] The laminated light-transmitting area is used to form a red laminated unit in the second color filter layer.

[0067] For example, in at least one mask unit, the stacked light-transmitting region is located on one side of the basic light-transmitting region along the first direction, and the stacked light-transmitting region is spaced a first distance from the basic light-transmitting region in the first direction.

[0068] In at least another mask unit adjacent to the at least one mask unit in the second direction, the stacked light-transmitting area is located on one side of the basic light-transmitting area along the first direction, and the stacked light-transmitting area is at a second distance from the basic light-transmitting area in the first direction, and the second distance is greater than the first distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 A pixel layout diagram of a display panel according to an embodiment of the present disclosure is shown.

[0070] Figure 2 A cross-sectional view of a display panel according to an embodiment of the present disclosure is shown.

[0071] Figure 3 The figure shows a color filter structure diagram for a pixel unit in a display panel according to an embodiment of the present disclosure.

[0072] Figure 4 FIG. 4 shows a color filter structure diagram for a red sub-pixel in a display panel according to an embodiment of the present disclosure.

[0073] Figure 5 FIG. 4 shows a color filter structure diagram for a green sub-pixel in a display panel according to an embodiment of the present disclosure.

[0074] Figure 6 FIG2 shows a color filter structure diagram for a pixel unit in a display panel according to another embodiment of the present disclosure.

[0075] Figure 7A A cross-sectional view of a display panel according to another embodiment of the present disclosure is shown.

[0076] Figure 7B A microscopic cross-sectional view of the color filter layer structure of a display panel according to an embodiment of the present disclosure is shown.

[0077] Figure 8A A top view of a mask plate for manufacturing a blue color filter according to an embodiment of the present disclosure is shown.

[0078] Figure 8B Shown Figure 8A An enlarged view of the first mask unit in FIG.

[0079] Figure 8C Shown Figure 8A An enlarged view of the second mask unit in FIG.

[0080] Figure 9 A top view of a mask plate for manufacturing a green color filter according to an embodiment of the present disclosure is shown.

[0081] Figure 10 A top view of a mask plate for manufacturing a red color film according to an embodiment of the present disclosure is shown.

[0082] Figure 11A 、 Figure 11B and Figure 11C Pixel layout diagrams of display panels according to other embodiments of the present disclosure are respectively shown.

[0083] Figure 12 Shown Figure 11A Color filter structure diagram for pixel unit under pixel layout.

[0084] Figure 13 A cross-sectional view of a display panel according to yet another embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0085] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that throughout the drawings, the same elements are represented by the same or similar figure marks. In the following description, some specific embodiments are only for descriptive purposes and should not be understood as any limitation to the present disclosure, but are only examples of the embodiments of the present disclosure. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure. It should be noted that the shapes and sizes of the components in the figures do not reflect the actual size and proportion, but only illustrate the contents of the embodiments of the present disclosure.

[0086] Unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure shall have the same general meaning as those skilled in the art. The terms "first," "second," and similar terms used in the embodiments of the present disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different components.

[0087] In addition, in the description of the embodiments of the present disclosure, the term "connected" or "connected to" may refer to a direct connection between two components or a connection between two components via one or more other components. In addition, the two components may be connected or coupled via a wired or wireless manner.

[0088] Typically, in a display panel formed based on COE technology, ambient light becomes monochromatic light after passing through the color film of the display panel and entering the display panel. Monochromatic light will produce a diffraction / dispersion effect at the edge of the opening of the black matrix, thereby generating more divergent incident diffracted light in all directions. The incident diffracted light is then reflected by the bottom metal film layer of the display panel (such as the anode and cathode of the OLED), ultimately resulting in more divergent monochromatic reflected light. This monochromatic light overlaps with the monochromatic light of adjacent sub-pixels or alternating sub-pixels of the same color, and the intensity of the reflected light at the overlap increases, ultimately resulting in periodic monochromatic or mixed-color bright stripes, the so-called color separation.

[0089] The embodiments of the present disclosure provide a display panel and a mask plate, which can reduce the diffraction effect of incident ambient light by superimposing a second color filter layer on the edge of each basic unit in the first color filter layer of the display panel, thereby alleviating the color separation phenomenon.

[0090] Figure 1 A pixel layout diagram of a display panel according to an embodiment of the present disclosure is shown.

[0091] like Figure 1 As shown, the display panel includes a substrate 110 and a plurality of pixel units arranged in an array on the substrate 110 . Figure 1 In , x represents the row direction of the array (the first direction), and y represents the column direction of the array (the second direction). Figure 1 Two pixel units Pxl_a (first pixel unit) and pixel units Pxl_b (second pixel unit) with different layouts are used.

[0092] Each pixel unit Px1_a and pixel unit Px1_b may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Figure 1 In the embodiment, the pixel units are arranged in a GGRB structure, that is, each pixel unit includes first and second green sub-pixels (collectively represented by G) arranged symmetrically to each other, a blue sub-pixel B and a red sub-pixel R.

[0093] In the pixel unit Pxl_a, the red sub-pixel R, the green sub-pixel G and the blue sub-pixel B are arranged along the x-direction, and the green sub-pixel G and the red sub-pixel R are respectively located on both sides of the blue sub-pixel B in the x-direction, wherein the first green sub-pixel and the second green sub-pixel in the green sub-pixel G are arranged along the y-direction.

[0094] In the pixel unit Pxl_b, the red sub-pixel R, the green sub-pixel G and the blue sub-pixel B are arranged along the x-direction, and the blue sub-pixel B and the green sub-pixel B are respectively located on both sides of the red sub-pixel in the x-direction, and the first green sub-pixel and the second green sub-pixel in the green sub-pixel G are arranged along the y-direction.

[0095] exist Figure 1 , the pixel units located in the same row are all one of the pixel unit Pxl_a and the pixel unit Pxl_b, and of any two adjacent pixel units located in the same column, one is the pixel unit Pxl_a and the other is the pixel unit Pxl_b. For example, the pixel unit Pxl_a is located in odd rows, and the pixel unit Pxl_b is located in even rows, or vice versa, so that of any two adjacent pixel units in the y direction, one is the pixel unit Pxl_a and the other is the pixel unit Pxl_b. In this way, any two adjacent sub-pixels have different colors in both the row direction and the column direction. However, the embodiments of the present disclosure are not limited thereto. In some embodiments, a pixel unit with one layout can be adopted, for example, the pixel unit Pxl_a. In other embodiments, pixel units with three or more layouts can be adopted, which are not limited here.

[0096] exist Figure 1 For ease of description, the shape and position of each sub-pixel are represented by the projection of the opening area of ​​each sub-pixel on the substrate. However, those skilled in the art will appreciate that this does not limit the actual structure of each sub-pixel.

[0097] Figure 2 A cross-sectional view of a display panel according to an embodiment of the present disclosure is shown.

[0098] like Figure 2 As shown, the display panel includes a substrate 110 and a plurality of sub-pixels arranged on one side of the substrate 110, such as a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. The display panel 110 also includes an encapsulation layer 120, a light shielding layer 130, a first color filter layer 140, and a second color filter layer 150.

[0099] The encapsulation layer 120 is located on a side of the plurality of sub-pixels R, G, and B away from the substrate 110 and covers the plurality of sub-pixels R, G, and B.

[0100] The light shielding layer 130 is located on a side of the encapsulation layer 120 away from the substrate 110. The light shielding layer 130 may be provided with a plurality of openings corresponding to the plurality of sub-pixels R, G, and B. For example, the light shielding layer 130 may be a black matrix.

[0101] The first color filter layer 140 includes a plurality of basic cells, such as a red basic cell CF_R, a green basic cell CF_G, and a blue basic cell CF_B. The basic cells CF_R, CF_G, and CF_B respectively cover the plurality of openings in the light shielding layer 120, such that, for example, the red basic cell CF_R is located above the red sub-pixel R (i.e., on the side away from the substrate 110), the green basic cell CF_G is located above the green sub-pixel G, and the blue basic cell CF_B is located above the blue sub-pixel B.

[0102] The second color filter layer 150 is located on the side of the first color filter layer 140 away from the substrate 110. The second color filter layer 150 includes a plurality of stacked units, each of which covers the edge of at least one of the plurality of basic units, wherein the basic unit and the stacked unit covering the basic unit have different colors. Figure 2 In FIG, the edge of the red basic unit CF_R and the edge of the green basic unit CF_G are both covered by the blue stacked units in the second color filter layer 150. Figure 2 In the embodiment, a portion of each stacked unit in the second color filter layer 150 covers the underlying basic unit, while another portion contacts the surface of the light shielding layer 130 away from the substrate 110. The blue basic unit CF_B is not covered by any stacked unit, so that the entire surface of the blue basic unit CF_B away from the substrate 110 contacts the encapsulation layer 160. The color filter thickness above the red sub-pixel R and the green sub-pixel G is greater than the color filter thickness above the blue sub-pixel B. The color filter thickness herein may refer to the distance between two surfaces of the color filter in a direction perpendicular to the surface of the substrate 110. For example, the color filter thickness above the green sub-pixel G may refer to the distance between the surface of the green basic unit CF_G on the side closest to the substrate 110 and the surface of the stacked unit 150 covering the green basic unit CF_G on the side away from the substrate 110. The color filter thickness above the red sub-pixel R may refer to the distance between the surface of the red basic unit CF_R on the side closest to the substrate 110 and the surface of the stacked unit 150 covering the red basic unit CF_R on the side away from the substrate 110. The color filter thickness above the blue sub-pixel B may refer to the distance between the surface of the blue basic unit CF_B on the side closest to the substrate 110 and the surface of the blue basic unit CF_B on the side away from the substrate 110. Of course, the embodiments of the present disclosure are not limited to this. The edge of any basic unit may be covered by one or more stacked units of any appropriate color as needed, as will be further explained below.

[0103] Figure 3 The figure shows a color filter structure diagram for a pixel unit in a display panel according to an embodiment of the present disclosure.

[0104] like Figure 3As shown, the multiple basic units for the pixel units in the first color filter layer include a red basic unit CF_R for the red sub-pixel R, a green basic unit CF_G for the green sub-pixel, and a blue basic unit CF_B for the blue sub-pixel B. The multiple stacking units for the pixel units in the second color filter layer include a first blue stacking unit OL_B1 and a second blue stacking unit OL_B2, wherein at least a portion of the edge of the red basic unit CF_R is covered by the corresponding first blue stacking unit OL_B1, and at least a portion of the edge of the green basic unit CF_G is covered by the corresponding second blue stacking unit OL_B2.

[0105] The embodiments of the present disclosure utilize stacked units of a different color than the basic units to cover the edges of the basic units. This prevents ambient light from entering the display substrate from the edge of the basic unit and passing through the second color filter layer, essentially preventing it from passing through the first color filter layer underneath. This reduces incident diffracted light at the edges of the light-shielding layer openings. This can, on the one hand, weaken the range and intensity of reflected light, thereby reducing the area of ​​reflected light superposition, and reducing color separation and reflectivity. On the other hand, by designing the size and optical properties of the edge stacked color filter, the viewing angle of the display panel can be adjusted as needed to achieve an anti-peeping function. Furthermore, the design of the edge stacked color filter can be used to adjust the hue and reflectivity of the display panel.

[0106] The embodiments of the present disclosure take into account that the human eye is less sensitive to blue light than red and green light, and use a blue stacked unit to cover the edges of the red and green basic units. In this way, the appearance hue of the display panel is blue, which can improve the viewing comfort of the human eye while reducing the reflectivity.

[0107] Figure 4 FIG. 4 shows a color filter structure diagram for a red sub-pixel in a display panel according to an embodiment of the present disclosure.

[0108] like Figure 4 As shown, the projection of the red basic unit CF_R in the first color filter layer on the substrate is a hexagon, and the red basic unit CF_R has a first edge S1, a second edge S2, a third edge S3, a fourth edge S4, a fifth edge S5, and a sixth edge S6 connected in sequence. The first edge S1 and the fourth edge S4 are parallel to each other and have a first length, and the second edge S2, the third edge S3, the fifth edge S5, and the sixth edge S6 have a second length that is less than the first length. Figure 4 In the figure, the first edge S1 and the fourth edge S4 extend along the y direction, and the angle between the second edge S2 and the first edge S1, the angle between the third edge S3 and the fourth edge S4, the angle between the sixth edge S6 and the first edge S1, and the angle between the fifth edge S5 and the fourth edge S4 are all equal and greater than 90 degrees.

[0109] The first blue stacked unit includes a first blue subunit 1501 and a second blue subunit 1502, wherein the first blue subunit 1501 covers the first edge S1 of the red basic unit CF_R, and the second blue subunit 1502 covers the fourth edge S4 of the red basic unit CF_R. Figure 4 As shown, the first blue subunit 1501 can extend along the first edge S1 of the red basic unit CF_R in a strip shape, and at least a portion of the first blue subunit 1501 covers the first edge S1 of the red basic unit CF_R. Similarly, the second blue subunit 1502 can extend along the fourth edge S4 of the red basic unit CF_R in a strip shape, and at least a portion of the second blue subunit 1502 covers the fourth edge S4 of the red basic unit CF_R.

[0110] The width d1 of the first blue subunit 1501 perpendicular to the extension direction is in the range of 3 μm to 10 μm. The width d2 of the portion of the first blue subunit 1511 covering the red basic unit CF_R perpendicular to its own extension direction is in the range of 1 μm to 8 μm.

[0111] Similarly, the width of the second blue subunit 1502 in the direction perpendicular to the extension is in the range of 3 μm to 10 μm, and the width of the portion of the second blue subunit 1502 covering the red basic unit CF_R in the direction perpendicular to the extension is in the range of 1 μm to 2 μm. In some embodiments, the first blue subunit 1501 and the second blue subunit 1502 have the same width in the extension direction, and the width of the portion covering the basic unit is also the same.

[0112] Figure 5 FIG. 4 shows a color filter structure diagram for a green sub-pixel in a display panel according to an embodiment of the present disclosure.

[0113] like Figure 5 As shown, the green basic unit CF_G for the green sub-pixel in the first color filter layer includes a first green sub-portion CF_G1 and a second green sub-portion CF_G1, wherein the first green sub-portion CF_G1 is located on the side of the first green sub-pixel away from the substrate, and the second green sub-portion CF_G1 is located on the side of the second sub-pixel away from the substrate.

[0114] like Figure 5 As shown, the projections of the first green sub-portion CF_G1 and the second green sub-portion CF_G2 on the substrate are both pentagonal, and the first green sub-portion CF_G1 and the second green sub-portion each have a first edge D1, a second edge D2, a third edge D3, a fourth edge D4 and a fifth edge D5 connected in sequence. Figure 5In the embodiment, the first edge D1 and the third edge D3 are parallel, the second edge D2 is perpendicular to the first edge D1 and the third edge D3, and the angle between the fourth edge D4 and the third edge D3 is equal to the angle between the fifth edge D5 and the first edge D1.

[0115] exist Figure 5 , the first green sub-portion CF_G1 and the second green sub-portion CF_G2 are mirror images of each other with respect to the x-direction, so that the second edge D2 of the first green sub-portion CF_G1 and the second edge D2 of the second sub-portion CF_G2 are adjacent, and the third edge D3, the fourth edge D4 and the fifth edge D5 of the first green sub-portion CF_G1 are located on the side of the second edge D2 of the first green sub-portion CF_G1 away from the second green sub-portion CF_G2; and the third edge D3, the fourth edge D4 and the fifth edge D5 of the second green sub-portion CF_G2 are located on the side of the second edge D2 of the second green sub-portion CF_G2 away from the first green sub-portion CF_G1.

[0116] Accordingly, the second blue stack unit OL_B2 may include a third blue sub-unit 1503 and a fourth blue sub-unit 1504. The third blue sub-unit 1503 may cover at least one of the first edge D1, the second edge D2, the third edge D3, the fourth edge D4, and the fifth edge D5 of the first green sub-portion CF_G1, and the fourth blue sub-unit 1504 may cover at least one of the first edge, the second edge, the third edge, the fourth edge, and the fifth edge of the second green sub-portion CF_G2.

[0117] For example, Figure 5 In FIG, the third blue subunit 1503 covers the first edge D1, the second edge D2, the third edge D3 and the fifth edge D5 of the first green subunit CF_G1, and the fourth blue subunit 1504 covers the first edge D1, the second edge D2, the third edge D3 and the fourth edge D4 of the second green subunit CF_G2. Figure 5 As shown, the third blue subunit 1503 may extend in a stripe shape along the first edge D1, the second edge D2, the third edge D3, and the fifth edge D5 of the first green subunit CF_G1, and at least a portion of the third blue subunit 1503 covers the first edge D1, the second edge D2, the third edge D3, and the fifth edge D5 of the first green subunit CF_G1. Similarly, the fourth blue subunit 1504 may extend in a stripe shape along the first edge D1, the second edge D2, the third edge D3, and the fourth edge D4 of the second green subunit CF_G2, and at least a portion of the fourth blue subunit 1504 covers the first edge D1, the second edge D2, the third edge D3, and the fourth edge D4 of the second green subunit CF_G2.

[0118] The width d1 of the third blue subunit 1503 perpendicular to the extension direction can be in the range of 3μm to 10μm, and the width d2 of the portion of the third blue subunit 1503 covering the first green subunit CF_G1 perpendicular to the extension direction can be in the range of 1μm to 8μm. Similarly, the width of the fourth blue subunit 1504 perpendicular to the extension direction is also in the range of 3μm to 10μm, and the width of the portion of the fourth blue subunit 1504 covering the second green subunit CF_G2 perpendicular to the extension direction is also in the range of 1μm to 8μm. In some embodiments, the first to fourth blue subunits 1501, 1502, 1503, and 1504 can have the same width in the extension direction and the portions of each covering the underlying basic unit also have the same width.

[0119] Figure 6 FIG2 shows a color filter structure diagram for a pixel unit in a display panel according to another embodiment of the present disclosure. Figure 6 Color film structure and Figure 3 Similarly, the difference is at least that a green stacking unit and a red stacking unit are added. For the sake of simplicity, the following will mainly describe the differences in detail.

[0120] like Figure 6 As shown, compared to Figure 3 In addition to the first to fourth blue sub-units 1501 to 1504 , the multiple stacked units for the pixel units in the second color filter layer further include a green stacked unit and a red stacked unit.

[0121] The green stacking unit includes a first green stacking unit 1505 and a second green stacking unit 1506. The first green stacking unit 1505 can extend in a stripe shape along the second and third edges of the red basic unit CF_R and cover the second and third edges of the red basic unit CF_R. The second green stacking unit 1506 can extend in a stripe shape along the fifth and sixth edges of the red basic unit CF_R and cover the fifth and sixth edges of the red basic unit CF_R. In some embodiments, both ends of the first green stacking unit 1505 are respectively covered by one end of the first blue sub-unit 1501 and the second blue sub-unit 1502, and both ends of the second green stacking unit 1506 are respectively covered by the other ends of the first blue sub-unit 1501 and the second blue sub-unit 1502.

[0122] The red stacking unit includes a first red stacking unit 1507 and a second red stacking unit 1508. The first red stacking unit 1507 can extend in a stripe shape along the fourth edge of the first green sub-segment CF_G1 of the green basic unit and cover the fourth edge of the first green sub-segment CF_G1 of the green basic unit. The second red stacking unit 1508 can extend in a stripe shape along the fifth edge of the second green sub-segment CF_G2 of the green basic unit and cover the fifth edge of the second green sub-segment CF_G2 of the green basic unit. In some embodiments, both ends of the first red stacking unit 1507 are respectively covered by both ends of the third blue sub-unit 1503, and both ends of the second red stacking unit 1508 are respectively covered by both ends of the fourth blue sub-unit 1504.

[0123] The stripe widths of the first green stacking unit 1505, the second green stacking unit 1506, the first red stacking unit 1507, and the second red stacking unit 1508, as well as the widths of the portions of the stacking units covering the underlying basic units, can be set similarly to the first to fourth blue sub-units 1501 to 1504. In some embodiments, all stacking units can have the same stripe width and the same width of the portions of the stacking units covering the underlying basic units.

[0124] In the above embodiment, the width of each stacking unit in the direction perpendicular to the extension (also referred to as the overall width) and the width of the portion of the stacking unit that covers the underlying basic unit (also referred to as the coverage width) can be designed according to the size of the sub-pixel within the above-given range. For example, the overall width of the stacking unit can be designed to be 20% to 40%, for example, 30%, of the width of the stacking unit below it; and the coverage width of the stacking unit can be designed to be 10% to 30%, for example, 20% of the width of the underlying basic unit. The width of the basic unit here can refer to the size of the basic unit in the row direction of the sub-pixel array (i.e., the x-direction mentioned above). In some embodiments, the width of each stacking unit in the direction perpendicular to the extension can be in the range of 3μm to 4μm, for example, approximately 3μm; and the width of the portion of the stacking unit that covers the underlying basic unit in the direction perpendicular to its own extension can be in the range of 1μm to 2μm. In other embodiments, the width of the first blue subunit 1501 and the second blue subunit 1502 in the direction perpendicular to the extension direction can be in the range of 7 μm to 10 μm; and the width of the portion thereof covering the underlying basic unit in the direction perpendicular to its own extension direction can be in the range of 5 μm to 8 μm.

[0125] Figure 7A A cross-sectional view of a display panel according to another embodiment of the present disclosure is shown.

[0126] like Figure 7AAs shown, the display panel includes a substrate 110 and sub-pixels arranged on the substrate, and the sub-pixels may include a pixel driving circuit. Figure 7A In the embodiment, the pixel driving circuit includes a gate driving circuit having a gate G, a source S, and a drain D, and a capacitor having a first electrode ED1 and a second electrode ED2. The active layer P-Si of the thin film transistor is located between the buffer layer 701 and the first gate insulating layer 702, and is connected to the source S and the drain D. The interlayer insulating layer 704 is located between the gate G and the source S and the drain D. The first gate insulating layer 702 is located on the side of the interlayer insulating layer 704 facing the base substrate 110. The second gate insulating layer 703 is located between the interlayer insulating layer 704 and the first gate insulating layer 702. The first electrode ED1 of the capacitor is arranged in the same layer as the gate G of the thin film transistor, and the second electrode ED2 of the capacitor is arranged between the interlayer insulating layer 704 and the second gate insulating layer 703.

[0127] The sub-pixel may further include a passivation layer 705, a first planarization layer 706, a switching electrode 707, and a second planarization layer 708. The passivation layer 705 is located on the side of the interlayer dielectric layer 704 away from the base substrate 110. The first planarization layer 706 is located on the side of the passivation layer 704 away from the base substrate 110. The switching electrode 707 is located on the side of the first planarization layer 706 away from the base substrate 110 and is connected to the source electrode S of the thin film transistor through vias provided in the first planarization layer 706 and the passivation layer 705. The second planarization layer 708 is provided on the side of the switching electrode 707 away from the base substrate 110 and at least partially covers the switching electrode 707.

[0128] The sub-pixel may further include a pixel defining layer 709 and a light-emitting element, wherein the light-emitting element includes an anode 710, a light-emitting layer 711 and a cathode 712. The pixel defining layer 709 is located on the side of the second flat layer 708 away from the base substrate 110, and the gap (also referred to as PDL Gap) between the pixel defining layers of two adjacent sub-pixels in the row direction may be 19 μm. The anode 710 is located on the side of the second flat layer 708 away from the base substrate 110 and is connected to the transfer electrode 707 through a via in the second flat layer 708. The light-emitting layer 711 is located on the side of the anode 710 away from the base substrate 110 and partially covers the anode 710. The cathode 712 is located on the side of the light-emitting layer 711 away from the base substrate 110.

[0129] The encapsulation layer 120 is located on a side of the cathode 712 away from the base substrate 110. In some embodiments, the encapsulation layer 120 may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence.

[0130] In some embodiments, the display panel may further include a touch layer located between the encapsulation layer 120 and the light shielding layer 130. Figure 7AIn the display panel, the touch layer includes a first dielectric layer 713, a first electrode layer 714, a second dielectric layer 715, a second electrode layer 716, and a third dielectric layer 717. The first electrode layer 714 is located on the side of the encapsulation layer 120 away from the substrate 110, and the second electrode layer 716 is located on the side of the first electrode layer 714 away from the substrate 110. The first dielectric layer 713 is located between the encapsulation layer 120 and the first electrode layer 714, the second dielectric layer 715 is located between the first electrode layer 714 and the second electrode layer 716, and the third dielectric layer 717 is located between the second electrode layer 716 and the light shielding layer 130. The basic units in the first color filter layer 140 cover the openings in the light shielding layer 130. The stacked units in the second color filter layer 150 partially cover the edges of the basic units in the first color filter layer 140, while the remaining portions contact the surface of the light shielding layer 130 away from the substrate 110. The display panel may also include a cover plate 160, which is located on the side of the second color filter layer 150 away from the substrate 110.

[0131] Figure 7B A microscopic cross-sectional view of the color filter layer structure of a display panel according to an embodiment of the present disclosure is shown.

[0132] like Figure 7B As shown, the thickness H1 of the first color filter layer 140 (i.e., the dimension in the direction perpendicular to the substrate surface) can be in the range of 2 μm to 3 μm, for example, 2.465 microns. The thickness H1 of the second color filter layer 150 can be in the range of 1 μm to 2 μm, for example, 1.5 μm, and in some embodiments, can be 1.233 μm. The thickness H3 of the light shielding layer 130 can be in the range of 1 μm to 2 μm, for example, 1.506 μm. The stripe width d1 of the stacked units in the second color filter layer 150 is in the range of 3.5 μm to 4 μm. The distance between the basic units in the first color filter layer 140 and the opening edge of the light shielding layer 130 is in the range of 1.5 μm to 2.5 μm, for example, 2 μm. Both the first color filter layer 140 and the second color filter layer 150 can be made of a negative resist material. During the manufacturing process, the negative resist material is first applied and then exposed using a mask. The portion of the negative photoresist material exposed to light is retained, thereby forming a color filter layer; the portion not exposed to light is washed away, and a portion of the bottom edge of the retained portion is also washed away, so that the bottom surface of the edge of the final color filter layer has a certain slope relative to the surface of the film layer below it, that is, it has a so-called undercut structure. The length d3 of the undercut portion can be approximately 2.0μm, and the slope angle can be in the range of 30 degrees to 50 degrees, depending on the thickness of the color filter layer and the process. In the embodiment of the present disclosure, the thickness of the first color filter layer 140 is greater than the thickness of the second color filter layer 150. Therefore, the slope angle of the undercut structure of the first color filter layer 140 is greater than the slope angle of the second color filter layer 150. For example, the slope angle of the second color filter layer 150 is 45°.

[0133] Experimental verification has shown that the display panel of the disclosed embodiment can reduce color separation, thereby weakening diffraction and interference fringes. The display panel of the disclosed embodiment can also achieve uniform hue and reduce the absolute values ​​of a* / b*. For example, a* can be reduced from 6.0 to -0.4, and b* can be reduced from -11 to -5. The display panel of the disclosed embodiment can also reduce viewing angle brightness, making anti-peeping functions feasible.

[0134] Figure 8A A top view of a mask plate for manufacturing a blue color filter according to an embodiment of the present disclosure is shown.

[0135] As shown in the dotted box in FIG8 , the mask plate 800 includes a plurality of mask units arranged in an array, and each mask unit includes a plurality of light-transmitting regions 810 and opaque regions 820 located between the light-transmitting regions 810. Figure 1 The pixel layout and Figure 3 and Figure 6 The color filter structure of FIG8 may include a first mask unit BU_a and a second mask unit BU_b, which are respectively used for Figure 1 The two different pixel units Pxl_a and Pxl_b shown in FIG. Figure 3 or Figure 6 The blue color filter part in the color filter structure shown.

[0136] Figure 8B Shown Figure 8A An enlarged view of the first mask unit BU_a in FIG.

[0137] like Figure 8B As shown, the mask unit BU_a includes a basic light-transmitting area 8101 and a laminated light-transmitting area 8102. The basic light-transmitting area 8101 is used to form a basic unit of a preset color in the first color filter layer, and the laminated light-transmitting area 8102 is used to form a laminated unit of the preset color in the second color filter layer. Figure 8B In the embodiment, the basic light-transmitting region 8101 is used to form the blue basic unit in the first color filter layer. Therefore, the stacked light-transmitting region includes a first stacked light-transmitting region 8102 and a second stacked light-transmitting region 8103, which are respectively used to form the first blue stacked unit and the second blue stacked unit in the second color filter layer. The first stacked light-transmitting region 8102 and the second stacked light-transmitting region 8103 are located on either side of the basic light-transmitting region 8101 along the x-direction (the first direction, i.e., the row direction of the mask unit array).

[0138] The basic light-transmitting area 8101 has a hexagonal shape, similar to the above-mentioned blue basic unit, and has a first edge S1 to a sixth edge S6 connected in sequence. The first stacked light-transmitting area 8102 includes a first strip portion 81021 and a second strip portion 81022 that are parallel to each other. The second stacked light-transmitting area 8103 includes a third strip portion 81031 and a fourth strip portion 81032. The third strip portion and the fourth strip portion each have a first sub-portion F1, a second sub-portion F2, a third sub-portion F3, and a fourth sub-portion F4 that are connected in sequence, wherein the first sub-portion F1 and the third sub-portion F3 are parallel to each other, the second sub-portion F2 is perpendicular to the first sub-portion F1 and the third sub-portion F3, the fourth sub-portion F4 is inclined at a predetermined angle relative to the third sub-portion F3, and the fourth sub-portion F4 is separated from the first sub-portion F3. Corresponding to the above-mentioned third blue stacking unit and fourth blue stacking unit respectively, the projection of the third strip portion 81031 on the substrate has a first pattern in the form of an open ring, and the projection of the fourth strip portion 81032 on the substrate has a second pattern in the form of an open ring, and the second pattern can be a flipped pattern obtained by flipping the first pattern twice along the first direction (x direction) and the second direction (y direction).

[0139] Figure 8C Shown Figure 8A An enlarged view of the second mask unit in FIG.

[0140] like Figure 8C As shown, the structures of the basic light-transmitting area, the first stacked light-transmitting area and the second stacked light-transmitting area in the second mask unit BU_b are similar to those of the first mask unit BU_a. The difference is that the basic light-transmitting area 8101 and the second stacked light-transmitting area 8103 are respectively located on both sides of the first stacked light-transmitting area 8102 along the x-direction, so as to be used for making the blue color filter part above the above-mentioned pixel unit Pxl_b, which will not be repeated here.

[0141] Figure 9 A top view of a mask plate for manufacturing a green color filter according to an embodiment of the present disclosure is shown.

[0142] like Figure 9 As shown, similar to FIG8 , the mask unit 900 may include a first mask unit GU_a and a second mask unit GU_b, each for Figure 1 The two different pixel units Pxl_a and Pxl_b shown in FIG. Figure 6 The green color filter part in the color filter structure shown.

[0143] The first mask unit GU_a includes a basic light-transmitting region 910 and a stacked light-transmitting region 920 . The stacked light-transmitting region 920 is located on one side of the basic light-transmitting region 910 along the x-direction.

[0144] The basic light-transmitting area 910 of the first mask unit GU_a is used to form the green basic unit in the first color filter layer, and the stacked light-transmitting area 920 is used to form the green stacked unit in the second color filter layer. Figure 9 In the embodiment, the basic light-transmitting area 910 includes a first basic light-transmitting area 9101 and a second basic light-transmitting area 9102. The shapes of the first basic light-transmitting area 9101 and the second basic light-transmitting area 9102 are substantially the same as the projected shapes of the first green sub-portion CFG_1 and the second green sub-portion CF_G2 in the first color filter layer on the substrate, for example, the same pentagonal shape, so that the first basic light-transmitting area 9101 and the second basic light-transmitting area 9102 can be used to form the first green sub-portion CFG_1 and the second green sub-portion CF_G2, respectively.

[0145] The stacked light-transmitting region 920 of the first mask unit GU_a includes a first stacked light-transmitting region 9201 and a second stacked light-transmitting region 9202. The shapes of the first stacked light-transmitting region 9201 and the second stacked light-transmitting region 9202 are substantially the same as the projection shapes of the first green stacked unit 1505 and the second green stacked unit 1506 in the second color filter layer on the substrate, for example, both are V-shaped, so that the first stacked light-transmitting region 9201 and the second stacked light-transmitting region 9202 can be used to form the first green stacked unit 1505 and the second green stacked unit 1506, respectively.

[0146] The structure of the basic light-transmitting area 910 and the stacked light-transmitting area 920 in the second mask unit GU_b is identical to that of the mask unit GU_a. The difference is that the distance between the stacked light-transmitting area 920 and the basic light-transmitting area 910 in the second mask unit GU_b is smaller in the x-direction than in the first mask unit GU_a to conform to the sub-pixel layout on the substrate. The distance between the stacked light-transmitting area 920 and the basic light-transmitting area 910 can refer to the minimum distance between various portions of the stacked light-transmitting area 920 and various portions of the basic light-transmitting area 910. The distance between various portions of the stacked light-transmitting area 920 and various portions of the basic light-transmitting area 910 can refer to the distance between the geometric centers of the various portions or the distance between the edges of the various portions. In other embodiments, the distance between the stacked light-transmitting area 920 and the basic light-transmitting area 910 can refer to the distance between the collective center of the overall pattern of the stacked light-transmitting area 920 and the collective center of the overall pattern of the basic light-transmitting area 910.

[0147] Figure 10 A top view of a mask plate for manufacturing a red color film according to an embodiment of the present disclosure is shown.

[0148] like Figure 10 As shown, similar to Figure 9 The mask unit 1000 may include a first mask unit RU_a and a second mask unit RU_b, each for Figure 1 The two different pixel units Pxl_a and Pxl_b shown in FIG. Figure 6 The red color film part in the color film structure shown.

[0149] The first mask unit RU_a includes a basic light-transmitting region 1010 and a stacked light-transmitting region 1020 . The stacked light-transmitting region 1020 is located on one side of the basic light-transmitting region 1010 along the x-direction.

[0150] The basic light-transmitting area 1010 of the first mask unit RU_a is used to form the red basic unit in the first color filter layer, and the laminated light-transmitting area 920 is used to form the red laminated unit in the second color filter layer. Figure 10 In the figure, the shape of the basic light-transmitting area 1010 is substantially the same as the projection shape of the red basic unit CF_R in the first color filter layer on the substrate, for example, the same hexagonal shape, so that the basic light-transmitting area 1010 can be used to form the red basic unit CF_R.

[0151] The stacked light-transmitting region 1020 of the first mask unit RU_a includes a first stacked light-transmitting region 10201 and a second stacked light-transmitting region 10202. The shapes of the first stacked light-transmitting region 10201 and the second stacked light-transmitting region 10202 are substantially the same as the projection shapes of the first red stacked unit 1507 and the second red stacked unit 1508 in the second color filter layer on the substrate, for example, both are stripe-shaped and tilted at a preset angle relative to the x-direction, so that the first stacked light-transmitting region 9201 and the second stacked light-transmitting region 9202 can be used to form the first red stacked unit 1507 and the second red stacked unit 1508, respectively.

[0152] The structures of the basic light-transmitting area 1010 and the stacked light-transmitting area 1020 in the second mask unit RU_b are the same as those of the mask unit RU_a. The difference is that compared with the first mask unit RU_a, the distance between the stacked light-transmitting area 1020 and the basic light-transmitting area 1010 in the second mask unit RU_b is smaller in the x-direction to conform to the sub-pixel layout on the substrate.

[0153] By using the above-mentioned masks 800, 900 and 1000, it is possible to Figure 1 The pixel layout shown is formed as Figure 6 The color film structure shown. For example, refer to Figure 2, a plurality of sub-pixels R, G and B can be formed on the substrate 110, and then an encapsulation layer 120 is formed to cover the plurality of sub-pixels R, G and B. A light shielding layer 130 is formed on the encapsulation layer 120. A red photosensitive material layer is formed on the light shielding layer 130, and a mask plate 1000 is used to form the red basic unit in the first color filter layer 140 and the red stacking unit in the second color filter layer 150 through exposure and development processes. A green photosensitive material layer is then formed on the light shielding layer 130, and a mask plate 900 is used to form the green basic unit in the first color filter layer 140 and the green stacking unit in the second color filter layer 150 through exposure and development processes. A blue photosensitive material layer is then formed on the light shielding layer 130, and a mask plate 800 is used to form the blue basic unit in the first color filter layer 140 and the blue stacking unit in the second color filter layer 150 through exposure and development processes. In this way, the following is obtained. Figure 6 The patterns of the first color filter layer and the second color filter layer are shown. Then, the entire structure is covered with a cover plate 160. It can be seen that the embodiment of the present disclosure uses three mask plates to achieve the color filter layer superposition as described above without adding additional mask plates.

[0154] Although the above embodiments are based on Figure 1 The pixel layout described above illustrates the structure of the color filter layer, but the embodiments of the present disclosure are not limited thereto. The embodiments of the present disclosure are applicable to any other pixel layouts, such as Figure 11A 、 Figure 11B and Figure 11C The pixel layout shown. Figure 11A In the display panel, the display panel includes a substrate 1110 and pixel units Pxl_a and Pxl_b arranged in an array on the substrate 1110, each pixel unit including a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. The red sub-pixel R and the green sub-pixel G are located on one side of the blue sub-pixel B along the x-direction, and the red sub-pixel R and the green sub-pixel G are arranged in a row along the y-direction. The projections of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B on the substrate 1110 are all rectangular in shape, wherein the projection area of ​​the red sub-pixel R is larger than the projection area of ​​the green sub-pixel G, and the projection area of ​​the blue sub-pixel B is larger than the projection area of ​​the red sub-pixel R. Figure 11B In the embodiment, the display panel includes a substrate 1110 and pixel units Px1 arranged in an array on the substrate 1110, each pixel unit Px1 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, wherein the green sub-pixel G includes a first green sub-pixel and a second green sub-pixel (collectively represented by G) arranged along the y direction. In the pixel unit Px1, the blue sub-pixel B and the red sub-pixel R are located on both sides of the green sub-pixel G along the x direction, in the pixel unit Px1_b. Any two adjacent columns of pixel units Px1 are shifted relative to each other in the y direction. Figure 11B, the projections of the blue sub-pixel B and the red sub-pixel R on the substrate 1110 are trapezoidal and symmetrical with respect to the y direction, and the projections of the first green sub-pixel and the second green sub-pixel G on the substrate 1110 are pentagonal and symmetrical with respect to the x direction. Figure 11C Display panel and Figure 11B Similarly, the difference is that the projections of the red sub-pixel R and the blue sub-pixel B on the substrate 1110 are hexagonal instead of trapezoidal.

[0155] for Figure 11A The pixel layout of Figure 12 As shown, the red basic unit CF_R', green basic unit CF_G' and blue basic unit CF_B' in the first color filter layer are arranged in the same manner as the sub-pixels R, G, and B. The projections of the basic units CF_R', CF_G' and CF_B' on the substrate are all rectangular, covering the projections of the opening areas of the sub-pixels R, G, and B on the substrate respectively. The second color filter layer includes a first blue stacking unit OL_B1' and a second blue stacking unit OL_B2', wherein at least a portion of the first blue stacking unit OL_B1' covers all four edges of the green basic unit CF_G', and at least a portion of the second blue stacking unit OL_B2' covers all four edges of the red basic unit CF_R'. Similarly, for Figure 11B and Figure 11C The pixel layout of the red, green and blue basic units in the first color filter layer can adopt the same layout and projection shape as the red, green and blue sub-pixels respectively, and the stacking unit in the second color filter layer can cover one or more basic units in the first color filter layer as needed. Figure 11B The pixel layout of the first color filter layer can also have a trapezoidal shape in the projection of the red basic unit on the substrate 1110. The four sides of the trapezoid correspond to the four edges of the red basic unit. In this case, the blue stacking unit can be used to cover the two parallel edges of the red basic unit, or to cover three of the four edges of the red basic unit. The green basic unit can be covered by the blue stacking unit in a similar manner, which will not be repeated here.

[0156] Although the above embodiment uses a single layer of the second color filter layer covering the first color filter layer as an example, the embodiments of the present disclosure are not limited thereto. In some embodiments, the second color filter layer can be superimposed on the first color filter layer using other superposition methods as needed. In other embodiments, other color filter layers can be additionally superimposed on the second color filter layer. For example, Figure 13As shown, a third color filter layer 170 may be superimposed on at least a portion of the second color filter layer 150. In some embodiments, the colors of the basic units and the second and third color filter layers above them may be different. For example, the green overlay units in the second color filter layer 150 cover at least a portion of the edges of the red basic units in the first color filter layer 140, the red overlay units in the second color filter layer 150 cover at least a portion of the edges of the green basic units in the first color filter layer 140, the first blue overlay units in the third color filter layer 170 cover the green overlay units in the second color filter layer 150, and the second blue overlay units in the third color filter layer 170 cover the red overlay units in the second color filter layer 150.

[0157] It should be noted that the above description only illustrates the technical solutions of the embodiments of the present disclosure by way of example, and does not mean that the embodiments of the present disclosure are limited to the above steps and structures. Where possible, the steps and structures can be adjusted and selected as needed. Therefore, some steps and units are not essential elements for implementing the overall inventive concept of the embodiments of the present disclosure.

[0158] The present disclosure has been described so far in conjunction with preferred embodiments. It should be understood that those skilled in the art may make various other changes, substitutions, and additions without departing from the spirit and scope of the embodiments of the present disclosure. Therefore, the scope of the embodiments of the present disclosure is not limited to the specific embodiments described above, but is defined by the appended claims.

Claims

1. A display panel, comprising: substrate, A plurality of sub-pixels are arranged on one side of the substrate; an encapsulation layer, located on a side of the plurality of sub-pixels away from the substrate and covering the plurality of sub-pixels; a light shielding layer, located on a side of the encapsulation layer away from the substrate, wherein the light shielding layer is provided with a plurality of openings corresponding to the plurality of sub-pixels respectively; A first color filter layer includes a plurality of basic units, wherein the plurality of basic units respectively cover the plurality of openings in the light shielding layer, and the plurality of basic units include at least one red basic unit, at least one green basic unit, and at least one blue basic unit; as well as a second color filter layer, located on a side of the first color filter layer away from the substrate, the second color filter layer comprising a plurality of stacked units, the plurality of stacked units respectively covering an edge of at least one basic unit among the plurality of basic units, wherein the basic unit and the stacked units covering the basic unit have different colors, the plurality of stacked units comprising at least one first blue stacked unit corresponding one-to-one to the at least one red basic unit and at least one second blue stacked unit corresponding one-to-one to the at least one green basic unit, the first blue stacked unit and the blue basic unit being spaced apart, and the second blue stacked unit and the blue basic unit being spaced apart; At least a portion of an edge of the red basic unit is covered by the corresponding first blue stacking unit; At least a portion of an edge of the green basic unit is covered by a corresponding second blue stacking unit; The blue basic unit is not covered by any stacking unit.

2. The display panel according to claim 1, wherein The projection of the red basic unit on the substrate is a polygon, the red basic unit includes a plurality of edges connected in sequence, and two edges of the plurality of edges are parallel to each other; The first blue stacking unit includes a first blue sub-unit and a second blue sub-unit, and the first blue stacking unit covers two edges of the red basic unit that are parallel to each other.

3. The display panel according to claim 2, wherein: The projection of the red basic unit on the substrate is a hexagon, and the red basic unit has a first edge, a second edge, a third edge, a fourth edge, a fifth edge, and a sixth edge connected in sequence, wherein the first edge and the fourth edge are parallel to each other and have a first length, and the second edge, the third edge, the fifth edge, and the sixth edge have a second length that is less than the first length; The first blue stacking unit includes a first blue sub-unit and a second blue sub-unit. The first blue sub-unit covers a first edge of the red basic unit, and the second blue sub-unit covers a fourth edge of the red basic unit.

4. The display panel according to claim 3, wherein: The multiple stacking units also include at least one green stacking unit corresponding one-to-one to the at least one red basic unit, wherein the green stacking unit includes a first green stacking unit and a second green stacking unit, the first green stacking unit covers the second edge and the third edge of the red basic unit, and the second green stacking unit covers the fifth edge and the sixth edge of the red basic unit.

5. The display panel according to claim 3, wherein: The first blue subunit is in a strip shape and extends along the first edge of the red basic unit, and at least a portion of the first blue subunit covers the first edge of the red basic unit; The second blue sub-unit extends in a strip shape along the fourth edge of the red basic unit, and at least a portion of the second blue sub-unit covers the fourth edge of the red basic unit. The display panel according to claim 5 , wherein: The width of the first blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of the portion of the first blue subunit covering the red basic unit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm; The width of the second blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of the portion of the second blue subunit covering the red basic unit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm.

7. The display panel according to claim 1, wherein: The green basic unit includes a first green sub-section and a second green sub-section, projections of the first green sub-section and the second green sub-section on the substrate are both pentagonal, and the first green sub-section and the second green sub-section each have a first edge, a second edge, a third edge, a fourth edge and a fifth edge connected in sequence, The second blue stacking unit includes a third blue subunit and a fourth blue subunit, the third blue subunit covers at least one of the first edge, second edge, third edge, fourth edge and fifth edge of the first green subpart, and the fourth blue subunit covers at least one of the first edge, second edge, third edge, fourth edge and fifth edge of the second green subpart.

8. The display panel according to claim 7, wherein: In each of the first green subsection and the second green subsection, the first edge and the third edge are parallel, the second edge is perpendicular to the first edge and the third edge, and the angle between the fourth edge and the third edge is equal to the angle between the fifth edge and the first edge; The first green sub-segment and the second green sub-segment are mirror images of each other, so that the second edge of the first green sub-segment is adjacent to the second edge of the second green sub-segment, the third edge, the fourth edge, and the fifth edge of the first green sub-segment are located on a side of the second edge of the first green sub-segment away from the second green sub-segment, and the third edge, the fourth edge, and the fifth edge of the second green sub-segment are located on a side of the second edge of the second green sub-segment away from the first green sub-segment; and The third blue subunit covers the first edge, the second edge, the third edge and the fifth edge of the first green subunit, and the fourth blue subunit covers the first edge, the second edge, the third edge and the fourth edge of the second green subunit.

9. The display panel according to claim 8, wherein: The multiple stacking units also include at least one red stacking unit corresponding one-to-one to the at least one green basic unit, wherein the red stacking unit includes a first red stacking unit and a second red stacking unit, the first red stacking unit covers the fourth edge of the first green sub-portion of the green basic unit, and the second red stacking unit covers the fifth edge of the second green sub-portion of the green basic unit.

10. The display panel according to claim 8, wherein: The third blue subunit extends in a strip shape along the first edge, the second edge, the third edge, and the fifth edge of the first green subunit, and at least a portion of the third blue subunit covers the first edge, the second edge, the third edge, and the fifth edge of the first green subunit; The fourth blue subunit extends in a strip shape along the first, second, third and fourth edges of the second green subunit, and at least a portion of the fourth blue subunit covers the first, second, third and fourth edges of the second green subunit.

11. The display panel according to claim 10, wherein: The width of the third blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of the portion of the third blue subunit covering the first green subunit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm; The width of the fourth blue subunit in the direction perpendicular to the extension direction is in the range of 3 μm to 10 μm, and the width of a portion of the fourth blue subunit covering the second green subunit in the direction perpendicular to the extension direction is in the range of 1 μm to 8 μm.

12. The display panel according to any one of claims 1 to 11, wherein: A portion of the stacking unit covers an edge of the basic unit, and another portion of the stacking unit contacts a surface of the light shielding layer away from the substrate.

13. The display panel according to any one of claims 1 to 12, wherein: The plurality of sub-pixels are divided into a plurality of pixel units, the plurality of pixel units are arranged in an array, each pixel unit includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, wherein The red basic unit is located on a side of the red sub-pixel away from the substrate, the green basic unit is located on a side of the green sub-pixel away from the substrate, and the blue basic unit is located on a side of the blue sub-pixel away from the substrate.

14. The display panel according to claim 13, wherein: The green sub-pixel includes a first green sub-pixel and a second green sub-pixel, and the green basic unit includes a first green sub-portion and a second green sub-portion, wherein: The first green sub-portion is located on a side of the first green sub-pixel away from the substrate, and the second green sub-portion is located on a side of the second green sub-pixel away from the substrate.

15. The display panel according to claim 14, wherein: The plurality of pixel units include at least one first pixel unit and at least one second pixel unit, wherein: In the first pixel unit, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are arranged along a first direction, and the green sub-pixel and the red sub-pixel are respectively located on both sides of the blue sub-pixel in the first direction, and the first green sub-pixel and the second green sub-pixel are arranged along a second direction, wherein the first direction is a row direction of the array, and the second direction is a column direction of the array; In the second pixel unit, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are arranged along a first direction, and the blue sub-pixel and the green sub-pixel are respectively located on both sides of the red sub-pixel in the first direction, wherein the first green sub-pixel and the second green sub-pixel of the green sub-pixel are arranged along a second direction; and The pixel units located in the same row are all one of the first pixel unit and the second pixel unit, and any two adjacent pixel units in the pixel units located in the same column are respectively the first pixel unit and the second pixel unit.

16. The display panel according to any one of claims 1 to 15, further comprising: A cover plate is located on a side of the second color filter layer away from the substrate.

17. The display panel according to any one of claims 1 to 16, further comprising: A touch layer is located between the encapsulation layer and the light shielding layer.

18. The display panel according to any one of claims 1 to 17, wherein: At least one of the plurality of sub-pixels comprises: a pixel driving circuit, located on a side of the substrate facing the light shielding layer; a planarization layer, located on a side of the pixel driving circuit away from the substrate; an anode, located on a side of the planarization layer away from the substrate and connected to a pixel driving circuit through a via hole in the planarization layer; a pixel defining layer, located on a side of the planarization layer away from the substrate and covering an edge of the anode; a light-emitting layer, located on a side of the anode away from the substrate; The cathode is located on a side of the light-emitting layer away from the substrate, and the encapsulation layer is located on a side of the cathode away from the substrate.

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