Display substrate and display device

Abstract

The invention provides a display substrate and a display device, and belongs to the technical field of display. The display substrate comprises a first color filter, a second color filter and a third color filter, the orthographic projection of the first color filter, the orthographic projection of the second color filter and the orthographic projection of the third color filter on the substrate have an overlapping area and a non-overlapping area; the overlapping region surrounds the non-overlapping region; the first color filter, the second color filter and the third color filter are located in the overlapping area and used for shading; the orthographic projection of the part, located in the non-overlapping area, of the first color filter on the substrate covers the orthographic projection of the first sub-pixel on the substrate; the orthographic projection of the part, located in the non-overlapping area, of the second color filter on the substrate covers the orthographic projection of the second sub-pixel on the substrate; the orthographic projection of the part, located in the non-overlapping area, of the third color filter on the substrate covers the orthographic projection of the third sub-pixel on the substrate.

Description

Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display substrate and a display device. Background Art

[0002] Color filter on encapsulation (COE) technology (or COE structure) is a new solution to the problem of ambient light reflection in organic light-emitting diode (OLED) display products.

[0003] It forms a color filter on the encapsulation layer, corresponding to the sub-pixels, and sets a black matrix (BM) on the gap between the sub-pixels, that is, the pixel define layer (PDL), which can effectively absorb light, thereby effectively improving the display transmittance while reducing the reflection of ambient light. However, due to the influence of fluctuations in the production process, gaps are inevitably generated between each color filter and the black matrix. However, the existence of this gap will cause diffraction and form a large aperture when the screen is turned off and an external point light source is irradiated. In addition, as the shape of the color film changes, the shape of the light diffraction will also change, forming different degrees of "X"-shaped light. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provide a display substrate and a display device.

[0005] In a first aspect, the technical solution adopted to solve the technical problem of the present disclosure is a display substrate, which includes a base substrate, a sub-pixel layer and a color filter structure arranged in sequence along a direction away from the base substrate; the sub-pixel layer includes a first sub-pixel, a second sub-pixel and a third sub-pixel; the color filter structure includes a first color filter, a second color filter and a third color filter arranged in layers;

[0006] The orthographic projections of the first color filter, the second color filter and the third color filter on the base substrate have overlapping areas and non-overlapping areas; the overlapping areas surround the non-overlapping areas;

[0007] The first color filter, the second color filter and the third color filter located in the overlapping area are used for light shielding;

[0008] The orthographic projection of the portion of the first color filter located in the non-overlapping area on the substrate covers the orthographic projection of the first sub-pixel on the substrate; the orthographic projection of the portion of the second color filter located in the non-overlapping area on the substrate covers the orthographic projection of the second sub-pixel on the substrate; the orthographic projection of the portion of the third color filter located in the non-overlapping area on the substrate covers the orthographic projection of the third sub-pixel on the substrate.

[0009] In some embodiments, the first color filter includes a plurality of first filter unit groups arranged side by side along a first direction, each of the first filter unit groups includes a plurality of first filter units arranged side by side along a second direction; the first direction is arranged to intersect with the second direction;

[0010] The first filter units in adjacent groups of the first filter units are arranged alternately; the first filter units include a first main body and a first branch; the first main body includes a first light shielding portion located in the overlapping area and a first light transmitting portion located in the non-overlapping area; the first branch is located in the overlapping area;

[0011] The first light-transmitting portion is used for transmitting light, and the first light-shielding portion surrounds the first light-transmitting portion; and the first branch portion is arranged on a side of the first light-shielding portion away from the first light-transmitting portion.

[0012] In some embodiments, the second color filter includes a plurality of second filter unit groups arranged side by side along the first direction, and each of the second filter unit groups includes a plurality of second filter units arranged side by side along the second direction;

[0013] The second filter units in the adjacent second filter unit groups are arranged alternately; the second filter units include a second main body and a second branch portion; the second main body includes a second light shielding portion located in the overlapping area and a second light transmitting portion located in the non-overlapping area; the second branch portion is located in the overlapping area;

[0014] The second light-transmitting portion is used for transmitting light, the second light-shielding portion surrounds the second light-transmitting portion, and the second branch portion is arranged on a side of the second light-shielding portion away from the second light-transmitting portion.

[0015] In some embodiments, the third color filter includes a plurality of third filter unit groups arranged side by side along the first direction, and each of the third filter unit groups includes a plurality of third filter units arranged side by side along the second direction;

[0016] The third light filtering unit comprises a third light shielding portion located in the overlapping area and a third light transmitting portion located in the non-overlapping area, the third light transmitting portion is used for transmitting light, and the third light shielding portion surrounds the third light transmitting portion;

[0017] The third light shielding portion includes a plurality of first sub-light shielding portions and a plurality of second sub-light shielding portions, and the first sub-light shielding portions and the second sub-light shielding portions are alternately arranged along a surrounding direction surrounding the third light-transmitting portion.

[0018] In some embodiments, in two adjacent first filter units in the adjacent group of first filter units, the first branch portion between the two first main bodies is shared, and the shared first branch portion and the first main body connected thereto are used together to define the third light-transmitting portion; in two adjacent first filter units in the first direction, the plurality of first branch portions between the two first main bodies and the first main body connected thereto are used together to define the second light-transmitting portion of the second filter unit;

[0019] Two second filter units adjacent to each other in an adjacent group of second filter units, wherein the second branch portion between the two second main bodies is shared, and the shared second branch portion and the second main body connected thereto are jointly used to define the third light-transmitting portion; two second filter units adjacent to each other in the first direction, wherein the plurality of second branch portions located between the two second main bodies and the second main body connected thereto are jointly used to define the first light-transmitting portion of the first filter unit.

[0020] In some embodiments, the orthographic projections of the first light shielding portion, the first sub-light shielding portion, and the second branch portion on the base substrate overlap; the orthographic projections of the second light shielding portion, the second sub-light shielding portion, and the first branch portion on the base substrate overlap.

[0021] In some embodiments, the orthographic projection of the first main body on the base substrate is a first projection pattern, the orthographic projection of the second main body on the base substrate is a second projection pattern; the orthographic projection of the third filter unit on the base substrate is a third projection pattern;

[0022] The first projection pattern and the second projection pattern are alternately arranged in the first direction and the second direction without overlapping;

[0023] A third center line connecting each of the third projection patterns corresponding to a group of the third filter unit groups is located between first center lines connecting each of the first projection patterns corresponding to an adjacent group of the second filter unit groups; or, a third center line connecting each of the third projection patterns corresponding to a group of the third filter unit groups is located between second center lines connecting each of the second projection patterns corresponding to an adjacent group of the second filter unit groups.

[0024] In some embodiments, the first projection pattern and the second projection pattern are divided into a plurality of projection units, each of the projection units includes a pair of the first projection pattern and the second projection pattern adjacent to each other in the first direction, and another pair of the first projection pattern and the second projection pattern adjacent to the pair of the first projection pattern and the second projection pattern in the second direction;

[0025] For any of the projection units, the center lines connecting the two adjacent first projection patterns and the second projection patterns form a square frame; the center of the third projection pattern is located in the square frame.

[0026] In some embodiments, the center of the third projection pattern coincides with the geometric center of the frame.

[0027] In some embodiments, the contour graphics of the first projection pattern, the second projection pattern, and the third projection pattern are all circular;

[0028] The contours of any adjacent first projection patterns and the second projection pattern are circumscribed; the contours of any adjacent two third projection patterns are circumscribed.

[0029] In some embodiments, the contour figure of the third projection pattern is an inscribed circle of the square frame.

[0030] In some embodiments, a diameter of the third projection pattern is greater than or equal to a diameter of the first projection pattern; and a diameter of the third projection pattern and a diameter of the first projection pattern are both smaller than a diameter of the second projection pattern.

[0031] In some embodiments, for any of the projection units, the third projection pattern overlaps with the first projection pattern to form a first overlapping area, and the first overlapping area is relatively arranged in the extension direction of the first diagonal line of the square frame; the third projection pattern overlaps with the second projection pattern to form a second overlapping area, and the second overlapping area is relatively arranged in the extension direction of the second diagonal line of the square frame;

[0032] The first overlapping area is a closed figure formed by connecting a first arc in the third projection pattern and a quarter of the arc in the first projection pattern end to end; the second overlapping area is a closed figure formed by connecting a second arc in the third projection pattern and a quarter of the arc in the second projection pattern end to end; wherein the first arc and the second arc are spliced ​​to form a semicircular arc in the third projection pattern;

[0033] The first light shielding portion, the first sub-light shielding portion and the second branch portion are located in the first overlapping area; the second light shielding portion, the second sub-light shielding portion and the first branch portion are located in the second overlapping area.

[0034] In some embodiments, for any first filter unit, the plurality of first branch portions are divided into four pairs of first branch portion pairs, which are respectively located at the boundary positions of 0°, 90°, 180° and 270° of the first main body; each pair of the first branch portion pairs includes two symmetrically arranged first branch portions, and the axis of symmetry thereof is the extension line of the line connecting the intersection of the two and the center of the first main body; the endpoints of the first branch portions are connected to the endpoints of the first light shielding portion;

[0035] For any second filtering unit, multiple second branch portions are divided into four pairs of second branch portion pairs, which are respectively located at the boundary positions of 0°, 90°, 180° and 270° of the second main body; each pair of second branch portion pairs includes two symmetrically arranged second branch portions, and its axis of symmetry is the extension line of the line connecting the intersection of the two and the center of the second main body; the endpoints of the second branch portion are connected to the endpoints of the second shading portion.

[0036] In a second aspect, an embodiment of the present disclosure provides a display device, which includes a display substrate as described in any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a film layer of a display substrate provided in an embodiment of the present disclosure;

[0038] Figure 2 A partial plan view of a first color filter provided in an embodiment of the present disclosure;

[0039] Figure 3 A plan view of a single first filter unit provided in an embodiment of the present disclosure

[0040] Figure 4 A partial plan view of a second color filter provided in an embodiment of the present disclosure;

[0041] Figure 5 A plan view of a single second filter unit provided in an embodiment of the present disclosure;

[0042] Figure 6 A partial plan view of a third color filter provided in an embodiment of the present disclosure;

[0043] Figure 7 A plan view of a single third filter unit provided in an embodiment of the present disclosure;

[0044] Figure 8A partial plan view of three layers of stacked color filters provided in an embodiment of the present disclosure;

[0045] Fig. 9 A schematic diagram of a projection unit provided in an embodiment of the present disclosure;

[0046] Fig.10 A partial plan view of a first mask provided in an embodiment of the present disclosure;

[0047] Fig.11 A partial plan view of a second mask provided in an embodiment of the present disclosure;

[0048] Fig.12 A partial plan view of a third mask provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme 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 only part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0050] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] The "multiple or several" mentioned in this disclosure refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0052] It should be noted that, in the present disclosure, the first direction X, the second direction Y and the third direction Z intersect each other in pairs. In the present disclosure, the first direction X and the second direction Y are perpendicular to each other in the plane where the substrate is located, the first direction X is a horizontal direction, the second direction Y is a vertical direction, and the third direction Z is a vertical direction, which is perpendicular to the plane where the substrate is located, is used as an example for explanation, but it does not constitute a limitation to the present disclosure.

[0053] In a first aspect, the present disclosure provides a display substrate, such as Figure 1 to Figure 6 As shown, the display substrate includes a base substrate 1, a sub-pixel layer and a color filter structure arranged in sequence in a direction away from the base substrate 1; the sub-pixel layer includes a first sub-pixel R, a second sub-pixel B and a third sub-pixel G; the color filter structure includes a first color filter R_CF, a second color filter B_CF and a third color filter G_CF which are stacked. Among them, the first sub-pixel R, the second sub-pixel B and the third sub-pixel G have different luminous colors; the first color filter R_CF is mainly arranged corresponding to the first sub-pixel R, and is used to transmit the first color light emitted by the first sub-pixel R; the second color filter B_CF is mainly arranged corresponding to the second sub-pixel B, and is used to transmit the second color light emitted by the second sub-pixel B; the third color filter G_CF is mainly arranged corresponding to the third sub-pixel G, and is used to transmit the third color light emitted by the third sub-pixel G. The orthographic projection of the first color filter R_CF on the substrate 1 at least partially overlaps with the orthographic projection of the first sub-pixel R on the substrate 1; the orthographic projection of the second color filter B_CF on the substrate 1 at least partially overlaps with the orthographic projection of the second sub-pixel B on the substrate 1; the orthographic projection of the third color filter G_CF on the substrate 1 at least partially overlaps with the orthographic projection of the third sub-pixel G on the substrate 1.

[0054] Exemplarily, one of the first color light, the second color light and the third color light is red light, another is green light, and the last is blue light. The present disclosure is explained by taking the first sub-pixel R as a red sub-pixel, the second sub-pixel B as a blue sub-pixel, and the third sub-pixel G as a green sub-pixel as an example. Correspondingly, the first color filter R_CF is a red filter (transmitting red light), the second color filter B_CF is a blue filter (transmitting blue light), and the third color filter G_CF is a green filter (transmitting green light). Of course, the present disclosure is not limited to this case. For example, the second sub-pixel may be a green sub-pixel and the third sub-pixel may be a blue sub-pixel; correspondingly, the second color filter is a green filter and the third color filter is a blue filter, which are not listed one by one here.

[0055] The orthographic projections of the first color filter R_CF, the second color filter B_CF, and the third color filter G_CF on the base substrate 1 have an overlapping area 21 and a non-overlapping area 22. Among them, the overlapping area 21 surrounds the non-overlapping area 22. Specifically, the overlapping positions of the orthographic projections of the first color filter R_CF, the second color filter B_CF, and the third color filter G_CF on the base substrate 1 are recorded as the overlapping area 21, and the other positions are the non-overlapping areas 22. Among them, the first color filter R_CF, the second color filter B_CF, and the third color filter G_CF located in the overlapping area 21 are stacked in three layers to form a shading structure, which can be used for shading to prevent adjacent sub-pixels from mixing colors. The shading structure here is equivalent to the black matrix (BM).

[0056] The orthographic projection of the portion of the first color filter R_CF located in the non-overlapping area 22 on the substrate substrate 1 at least partially overlaps with the orthographic projection of the first sub-pixel R on the substrate substrate 1. The orthographic projection of the portion of the second color filter B_CF located in the non-overlapping area 22 on the substrate substrate 1 at least partially overlaps with the orthographic projection of the second sub-pixel B on the substrate substrate 1. The orthographic projection of the portion of the third color filter G_CF located in the non-overlapping area 22 on the substrate substrate 1 at least partially overlaps with the orthographic projection of the third sub-pixel G on the substrate substrate 1.

[0057] Optionally, the orthographic projection of the portion of the first color filter R_CF located in the non-overlapping area 22 on the substrate substrate 1 covers the orthographic projection of the first sub-pixel R on the substrate substrate 1, and is used to transmit red light; the orthographic projection of the portion of the second color filter B_CF located in the non-overlapping area 22 on the substrate substrate 1 covers the orthographic projection of the second sub-pixel B on the substrate substrate 1, and is used to transmit blue light; the orthographic projection of the portion of the third color filter G_CF located in the non-overlapping area 22 on the substrate substrate 1 covers the orthographic projection of the third sub-pixel G on the substrate substrate 1, and is used to transmit green light.

[0058] Exemplarily, the display substrate further includes a pixel defining layer PDL, which includes a pixel opening for defining sub-pixels (including a first sub-pixel R, a second sub-pixel B, and a third sub-pixel G). The orthographic projection of the pixel opening in the pixel defining layer PDL on the base substrate 1 is located within the orthographic projection of the non-overlapping area 22 on the base substrate 1.

[0059] The embodiment of the present disclosure only has three layers of stacked color filters, and no black matrix (BM) is provided. However, the stacked structure of the three layers of color filters in the overlapping area 21 is used as a light shielding structure, which can achieve a light shielding effect and prevent adjacent sub-pixels from mixing colors. Compared with the prior art, the embodiment of the present disclosure does not need to set a black matrix (BM), which saves the preparation process of the black matrix (for example, reducing a black matrix (BM) Mask process), improves process efficiency, and reduces process costs; at the same time, the gap between the color filter and the black matrix is ​​eliminated, and the light diffraction phenomenon in the dark state is directly eliminated, thereby reducing the optical adverse phenomena caused by the shape change of the color filter and other optical diffraction.

[0060] In some embodiments, Figure 2 and Figure 3 As shown, the first color filter R_CF includes a first filter unit group 3 arranged side by side along a first direction X, and each group of the first filter unit group 3 includes a plurality of first filter units 31 arranged side by side along a second direction Y; the first direction X and the second direction Y are arranged crosswise, for example, the first direction X and the second direction Y are arranged perpendicularly. Among them, the first filter units 31 in adjacent groups of first filter unit groups 3 are arranged alternately; the first filter unit 31 includes a first main body 32 and a first branch portion 33; the first main body 32 includes a first light shielding portion 321 located in the overlapping area 21 and a first light transmitting portion 322 located in the non-overlapping area 22; the first branch portion 33 is located in the overlapping area 21; the first light transmitting portion 322 is used for transmitting light, that is, transmitting the red light emitted by the first sub-pixel R; the first light shielding portion 321 surrounds the first light transmitting portion 322, and the first branch portion 33 is arranged on the side of the first light shielding portion 321 away from the first light transmitting portion 322. Since the first light shielding portion 321 and the first branch portion 33 are both located in the overlapping area 21, the first light shielding portion 321 and the first branch portion 33 overlap with other color filters to serve as a light shielding structure (as described below). Figure 8 A part of the first light shielding structure 61).

[0061] Optionally, the orthographic projection of the first main body 32 on the base substrate 1 is a first projection pattern 30. For any group of first filter element groups 3, the first center line S1 of the first projection pattern 30 extends along the second direction Y.

[0062] Optionally, the center O1 of the first light-transmitting portion 322 is the center O1 of the first main body portion 32, and is also the center O1 of the first filter unit 31. Optionally, the orthographic projection of the first light-transmitting portion 322 on the substrate 1 overlaps at least partially with the orthographic projection of the first sub-pixel R on the substrate 1. Specifically, the orthographic projection of the first light-transmitting portion 322 on the substrate 1 covers the orthographic projection of the first sub-pixel R on the substrate 1, thereby being used for light transmission. The center O1 of the first light-transmitting portion 322 is aligned with the center of the pixel opening of the first sub-pixel R, and the orthographic projections of the two on the substrate 1 overlap.

[0063] Optionally, the first filter unit 31 is a centrally symmetrical figure. Optionally, the first main body 32 is a centrally symmetrical figure. Optionally, the first light-transmitting part 322 is a centrally symmetrical figure. Optionally, the pattern formed by the multiple first light-shielding parts 321 in the first main body 32 is a centrally symmetrical figure centered on the center of the first main body 32. The pattern formed by the multiple first branch parts 33 in the first filter unit 31 is a centrally symmetrical figure centered on the center of the first main body 32.

[0064] Optionally, the contour shape of the orthographic projection of the first main body 32 on the substrate 1 is circular. Optionally, the contour shape of the orthographic projection of the first light shielding portion 321 on the substrate 1 is blade-shaped. Here, the so-called "blade shape" refers to a closed figure formed by connecting two arcs (such as minor arcs) end to end. Optionally, the contour shape of the orthographic projection of the first light-transmitting portion 322 on the substrate 1 is a quasi-square, and its four sides are all concave curved sides concave toward the center O1, and the sides are equal in length. At the same time, the blade curved side of the first light-shielding portion 321 is an outward convex curved side; the concave curved side coincides with a blade curved side of the first light-shielding portion 321 close to the center O1. Optionally, the first main body 32 includes four blade-shaped first light-shielding portions 321 and a square-shaped first light-transmitting portion 322; the four first light-shielding portions 321 are respectively arranged corresponding to the four concave curved sides of the first light-transmitting portion 322 to form a circular first main body 32. Specifically, the four blade curved edges of the four first light shielding portions 321 close to the center O1 respectively overlap with the four concave curved edges of the first light transmitting portion 322 , forming a first main body portion 32 in which the four first light shielding portions 321 surround one first light transmitting portion 322 .

[0065] Optionally, for a first filter unit 31, it includes a plurality of first branch portions 33, and the plurality of first branch portions 33 surround the first main body 32. Optionally, for a first filter unit 31, the plurality of first branch portions 33 are divided into a plurality of pairs of first branch portion pairs 33a, each pair of first branch portion pairs 33a includes two symmetrically arranged first branch portions 33, and the axis of symmetry is the extension line of the line connecting the intersection of the two and the center O1 of the first main body 32. The extension direction of the extension line is the first direction X or the second direction Y. Exemplarily, for a first filter unit 31, it includes eight first branch portions 33, which are divided into four pairs of first branch portion pairs 33a, wherein two pairs of first branch portion pairs 33a are arranged opposite to each other in the first direction X, and are arranged symmetrically with the center line extending along the second direction Y and passing through the center of the first main body 32 as the axis of symmetry. The other two pairs of first branch portion pairs 33a are arranged opposite to each other in the second direction Y, and are arranged symmetrically with the center line extending along the first direction X and passing through the center of the first main body 32 as the axis of symmetry.

[0066] Optionally, the contour shape of the orthographic projection of the first branch portion 33 on the substrate 1 is a blade shape. Here, the so-called "blade shape" refers to a closed figure formed by connecting two arcs (such as an inferior arc) end to end. For a pair of first branch portion pairs 33a, the blade curved edge away from the axis of symmetry in one of the first branch portions 33 and the blade curved edge away from the axis of symmetry in the other first branch portion 33 have equal arc lengths and the same arc angles, and the two are connected to form a semicircular arc, and the arc radius is R2. For a first filter unit 31, the number of first branch portion pairs 33a is the same as the number of first shading portions 321. A first shading portion 321 is provided between two adjacent first branch portions 33 in two adjacent pairs of first branch portion pairs 33a. The intersection of the two blade curved edges in the first branch portion 33 (i.e., the end point of the first branch portion 33) is at the same position as the intersection of the two blade curved edges in the first light shielding portion 321 (i.e., the end point of the first light shielding portion 321), i.e., the vertex of the square-shaped first light-transmitting portion 322, and the first branch portion 33 is connected to the first light shielding portion 321 at the intersection of the blade curved edges. For two adjacent first branch portions 33 in two adjacent pairs of first branch portion pairs 33a, the blade curved edge of the first branch portion 33 away from the other first branch portion 33 is connected to the blade curved edge of the first light shielding portion 321 between the two to form a semicircular arc, and the arc radius is R3.

[0067] Optionally, the first branch portion 33 , the first light shielding portion 321 and the first light transmitting portion 322 are connected to form an integrally formed structure.

[0068] Optionally, in two first filter units 31 adjacent to each other in the adjacent group of first filter units 3, the first branch portion 33 between the two first main bodies 32 is shared, for example, the first branch portion 331 and the first branch portion 332, and the shared first branch portion 331 and the first branch portion 332, and the inner closed area formed by the two first main bodies 32 connected thereto is a portion of the non-overlapping area 22 (recorded as the first non-overlapping sub-area 221), which is used to define the third light-transmitting portion 53 of the third filter unit 51. Optionally, in two first filter units 31 adjacent to each other in the first direction X, the inner closed area formed by the multiple first branch portions 33 between the two first main bodies 32 is a portion of the non-overlapping area 22 (recorded as the second non-overlapping sub-area 222), which is used to define the second light-transmitting portion 422 of the second filter unit 41.

[0069] In some embodiments, Figure 4 and Figure 5 As shown, the second color filter B_CF includes a plurality of groups of second filter unit groups 4 arranged side by side along the first direction X, and each group of second filter unit groups 4 includes a plurality of second filter units 41 arranged side by side along the second direction Y; the second filter units 41 in adjacent groups of second filter unit groups 4 are arranged alternately; the second filter unit 41 includes a second main body 42 and a second branch portion 43; the second main body 42 includes a second light-shielding portion 421 located in the overlapping area 21 and a second light-transmitting portion 422 located in the non-overlapping area 22; the second branch portion 43 is located in the overlapping area 21; the second light-transmitting portion 422 is used for light transmission, that is, for transmitting the blue light emitted by the second sub-pixel B; the second light-shielding portion 421 surrounds the second light-transmitting portion 422, and the second branch portion 43 is arranged on the side of the second light-shielding portion 421 away from the second light-transmitting portion 422. Since the second light shielding portion 421 and the second branch portion 43 are both located in the overlapping area 21, the second light shielding portion 421 and the second branch portion 43 overlap with other color filters to serve as a light shielding structure (as described below). Figure 8 A portion of the second light shielding structure 62).

[0070] Optionally, the orthographic projection of the second main body 42 on the base substrate 1 is a second projection pattern 40. For any group of second filter element groups 4, the second center line S2 of the second projection pattern 40 extends along the second direction Y.

[0071] Optionally, the center O2 of the second light-transmitting portion 422 is the center O2 of the second main body portion 42, and is also the center O2 of the second filter unit 41. Optionally, the orthographic projection of the second light-transmitting portion 422 on the base substrate 1 overlaps at least partially with the orthographic projection of the second sub-pixel B on the base substrate 1. Specifically, the orthographic projection of the second light-transmitting portion 422 on the base substrate 1 covers the orthographic projection of the second sub-pixel B on the base substrate 1, thereby being used for light transmission. The center O2 of the second light-transmitting portion 422 is aligned with the center of the pixel opening of the second sub-pixel B, and the orthographic projections of the two on the base substrate 1 overlap.

[0072] Optionally, the second filter unit 41 is a centrally symmetrical figure. Optionally, the second main body 42 is a centrally symmetrical figure. Optionally, the second light-transmitting part 422 is a centrally symmetrical figure. Optionally, the pattern formed by the plurality of second light-shielding parts 421 in the second main body 42 is a centrally symmetrical figure centered on the center of the second main body 42. The pattern formed by the plurality of second branch parts 43 in the second filter unit 41 is a centrally symmetrical figure centered on the center of the second main body 42.

[0073] Optionally, the contour shape of the orthographic projection of the second main body 42 on the substrate 1 is circular. Optionally, the contour shape of the orthographic projection of the second light shielding portion 421 on the substrate 1 is blade-shaped. Here, the so-called "blade shape" refers to a closed figure formed by connecting two arcs (such as minor arcs) end to end. Optionally, the contour shape of the orthographic projection of the second light-transmitting portion 422 on the substrate 1 is a quasi-square, and its four sides are all concave curved sides concave toward the center O2, and the sides are equal in length. At the same time, the blade curved side of the second light-shielding portion 421 is an outward convex curved side; the concave curved side coincides with a blade curved side of the second light-shielding portion 421 close to the center O2. Optionally, the second main body 42 includes four blade-shaped second light-shielding portions 421 and a quasi-square second light-transmitting portion 422; the four second light-shielding portions 421 are respectively arranged corresponding to the four concave curved sides of the second light-transmitting portion 422 to form a circular second main body 42. Specifically, the four blade curved edges of the four second light shielding portions 421 close to the center O2 respectively overlap with the four concave curved edges of the second light transparent portion 422 , forming a second main body portion 42 in which four second light shielding portions 421 surround one second light transparent portion 422 .

[0074] Optionally, for a second filter unit 41, it includes a plurality of second branch portions 43, and the plurality of second branch portions 43 surround the second main body 42. Optionally, for a second filter unit 41, the plurality of second branch portions 43 are divided into a plurality of pairs of second branch portion pairs 43a, each pair of second branch portion pairs 43a includes two symmetrically arranged second branch portions 43, and its symmetry axis is the extension line of the line connecting the intersection of the two and the center of the second main body 42. The extension direction of the extension line is the first direction X or the second direction Y. Exemplarily, for a second filter unit 41, it includes eight second branch portions 43, which are divided into four pairs of second branch portion pairs 43a, wherein two pairs of second branch portion pairs 43a are arranged opposite to each other in the first direction X, and are symmetrically arranged with the center line extending along the second direction Y and passing through the center of the second main body 42 as the symmetry axis. The other two pairs of second branch portion pairs 43a are arranged opposite to each other in the second direction Y, and are symmetrically arranged with the center line extending along the first direction X and passing through the center of the second main body 42 as the symmetry axis.

[0075] Optionally, the contour shape of the orthographic projection of the second branch portion 43 on the substrate 1 is a blade shape. Here, the so-called "blade shape" refers to a closed figure formed by connecting two arcs (such as inferior arcs) end to end. For a pair of second branch portion pairs 43a, the blade curved edge away from the axis of symmetry in one second branch portion 43 and the blade curved edge away from the axis of symmetry in another second branch portion 43 have equal arc lengths and the same arc angles, and the two are connected to form a semicircular arc, and the arc radius is R1. For a second filter unit 41, the number of second branch portion pairs 43a is the same as the number of second shading portions 421. A second shading portion 421 is provided between two adjacent second branch portions 43 in two adjacent pairs of second branch portion pairs 43a. The intersection position of the two blade curved edges in the second branch portion 43 is the same as the intersection position of the two blade curved edges in the second shading portion 421, that is, the vertex of the square-like second light-transmitting portion 422, and the second branch portion 43 is connected to the second shading portion 421 at the intersection position of the blade curved edges. For two adjacent second branch portions 43 in two adjacent pairs of second branch portion pairs 43a, the blade curved edge of the second branch portion 43 away from the other second branch portion 43 is connected to the blade curved edge of the second light shielding portion 421 between the two and close to the center O2 to form a semicircular arc, and the arc radius is R3. Optionally, the radius R1 is less than or equal to the radius R3; the radius R3 is less than the radius R2.

[0076] Optionally, the second branch portion 43 , the second light shielding portion 421 and the second light transparent portion 422 are connected to form an integrally formed structure.

[0077] Optionally, in two second filter units 41 adjacent to each other in the adjacent group of second filter units 4, the second branch portion 43 between the two second main bodies 42 is shared, for example, the second branch portion 431 and the second branch portion 432, and the shared second branch portion 431 and the second branch portion 432, and the inner closed area formed by the two second main bodies 42 connected thereto are a portion of the non-overlapping area 22 (recorded as the third non-overlapping sub-area 223), which is used to define the third light-transmitting portion 53 of the third filter unit 51. Optionally, in two second filter units 41 adjacent to each other in the first direction X, the inner closed area formed by the multiple second branch portions 43 between the two second main bodies 42 is a portion of the non-overlapping area 22 (recorded as the fourth non-overlapping sub-area 224), which is used to define the first light-transmitting portion 322 of the first filter unit 31.

[0078] In some embodiments, Figure 6 and Figure 7 As shown, the third color filter G_CF includes a plurality of third filter unit groups 5 arranged side by side along the first direction X, and each third filter unit group 5 includes a plurality of third filter units 51 arranged side by side along the second direction Y; the third filter unit 51 includes a third light-shielding portion 52 located in the overlapping area 21 and a third light-transmitting portion 53 located in the non-overlapping area 22, and the third light-transmitting portion 53 is used for transmitting light, that is, transmitting the green light emitted by the third sub-pixel G; the third light-shielding portion 52 surrounds the third light-transmitting portion 53; the third light-shielding portion 52 includes a plurality of first sub-light-shielding portions 521 and a plurality of second sub-light-shielding portions 522, and the first sub-light-shielding portions 521 and the second sub-light-shielding portions 522 are alternately arranged along the surrounding direction surrounding the third light-transmitting portion 53. Since the first sub-light-shielding portion 521 and the second sub-light-shielding portion 522 are both located in the overlapping area 21, the first sub-light-shielding portion 521 and the second sub-light-shielding portion 522 overlap with other color filters to serve as a light-shielding structure (wherein the first sub-light-shielding portion 521 is used as a part of the first light-shielding structure 61, and the second sub-light-shielding portion 522 is used as a part of the second light-shielding structure 62).

[0079] Optionally, the orthographic projection of the third filter unit 51 on the substrate 1 is a third projection pattern 50. For any group of third filter unit groups 5, the third center line S3 of the third projection pattern 50 extends along the second direction Y. For two adjacent groups of third filter unit groups 5, the center line of the adjacent third projection patterns 50 extends along the first direction X.

[0080] Optionally, the third filter units 51 in the third color filter G_CF are arranged in an array, that is, include multiple rows and multiple columns.

[0081] Optionally, the center O3 of the third light-transmitting portion 53 is the center O3 of the third filter unit 51. Optionally, the orthographic projection of the third light-transmitting portion 53 on the substrate substrate 1 overlaps at least partially with the orthographic projection of the third sub-pixel G on the substrate substrate 1. For example, the orthographic projection of the third light-transmitting portion 53 on the substrate substrate 1 covers the orthographic projection of the third sub-pixel G on the substrate substrate 1, thereby being used for light transmission. The center O3 of the third light-transmitting portion 53 is aligned with the center of the pixel opening of the third sub-pixel G, and the orthographic projections of the two on the substrate substrate 1 overlap.

[0082] Optionally, the third filter unit 51 is a centrally symmetrical pattern. Optionally, the third light-transmitting portion 53 is a centrally symmetrical pattern.

[0083] Optionally, the contour shape of the orthographic projection of the third filter unit 51 on the substrate 1 is circular. Optionally, the contour shape of the orthographic projection of the first sub-shading portion 521 on the substrate 1 is blade-shaped. The contour shape of the orthographic projection of the second sub-shading portion 522 on the substrate 1 is blade-shaped. Here, the so-called "blade shape" refers to a closed figure formed by connecting two circular arcs (such as an inferior arc) end to end. The blade area of ​​the first sub-shading portion 521 is smaller than the blade area of ​​the second sub-shading portion 522. Optionally, the contour shape of the orthographic projection of the third light-transmitting portion 53 on the substrate 1 is a rectangular shape, and its four sides are all concave curved sides concave toward the center O3, and the arc lengths of the concave curved sides arranged opposite to each other are equal. The third filtering unit 51 includes two oppositely arranged blade-shaped first sub-light-shielding portions 521, two oppositely arranged blade-shaped second sub-light-shielding portions 522, and a third light-transmitting portion 53 of a rectangular shape; wherein the long concave curved edge 531 of the rectangular shape is arranged correspondingly to the second sub-light-shielding portion 522, and the long concave curved edge 531 coincides with the blade curved edge of the second sub-light-shielding portion 522 close to the center O3; the short concave curved edge 532 of the rectangular shape is arranged correspondingly to the first sub-light-shielding portion 521, and the short concave curved edge 532 coincides with the blade curved edge of the first sub-light-shielding portion 521 close to the center O3, and the two first sub-light-shielding portions 521 and the two second sub-light-shielding portions 522 are alternately arranged around the third light-transmitting portion 53 to form a circular third filtering unit 51.

[0084] Optionally, the first sub-light-shielding portion 521 , the second sub-light-shielding portion 522 and the third light-transmitting portion 53 are connected to form an integrally formed structure.

[0085] Optionally, a third light filtering unit 51 includes two first sub-light shielding portions 521 and two second sub-light shielding portions 522 that are arranged opposite to each other, and the first sub-light shielding portions 521 and the second sub-light shielding portions 522 are alternately arranged along the circumferential direction surrounding the third light-transmitting portion 53. The two first sub-light shielding portions 521 that are arranged opposite to each other are arranged axially symmetrically with the center connecting line of the two second sub-light shielding portions 522 that are arranged opposite to each other as the symmetry axis, and the center connecting line passes through the center of the third light-transmitting portion 53. The two second sub-light shielding portions 522 that are arranged opposite to each other are arranged axially symmetrically with the center connecting line of the two first sub-light shielding portions 521 that are arranged opposite to each other as the symmetry axis, and the center connecting line passes through the center of the third light-transmitting portion 53. Optionally, the center connecting line of the two first sub-light shielding portions 521 that are arranged opposite to each other is perpendicular to the center connecting line of the two second sub-light shielding portions 522 that are arranged opposite to each other. Optionally, in the four third filtering units 51 that are adjacent to each other in the row and column directions to form a ring, the inner closed area formed by the four first sub-light-shielding portions 521 between the four third light-transmitting portions 53 is a portion of the non-overlapping area 22 (recorded as the fifth non-overlapping sub-area 225), which is used to define the first light-transmitting portion 322, and the inner closed area formed by the four second sub-light-shielding portions 522 between the four third light-transmitting portions 53 is a portion of the non-overlapping area 22 (recorded as the sixth non-overlapping sub-area 226), which is used to define the second light-transmitting portion 422.

[0086] In combination with the above-mentioned embodiments of the first color filter R_CF, the second color filter B_CF and the third color filter G_CF, further, as Figure 8 As shown, the orthographic projections of the first light-shielding portion 321, the first sub-light-shielding portion 521 and the second branch portion 43 on the substrate 1 overlap, and the three are stacked to form a first light-shielding structure 61; the orthographic projections of the second light-shielding portion 421, the second sub-light-shielding portion 522 and the first branch portion 33 on the substrate 1 overlap, and the three are stacked to form a second light-shielding structure 62.

[0087] In some embodiments, continuing as Figure 8 As shown, the first projection patterns 30 and the second projection patterns 40 are alternately arranged in the first direction X and the second direction Y, and do not overlap.

[0088] Optionally, in the first direction X, a line connecting the centers of any adjacent first projection pattern 30 and the centers of the second projection pattern 40 extends along the first direction X. In the second direction Y, a line connecting the centers of any adjacent first projection pattern 30 and the centers of the second projection pattern 40 extends along the second direction Y.

[0089] Optionally, the first filter unit group 3 and the second filter unit group 4 may share the same column, but the first projection patterns 30 and the second projection patterns 40 are arranged alternately, that is, the first projection patterns 30 in adjacent columns of the first filter unit groups 3 are arranged alternately, and the second projection patterns 40 in adjacent columns of the second filter unit groups 4 are arranged alternately. Optionally, adjacent first projection patterns 30 and second projection patterns 40 are in contact.

[0090] Continue as Figure 8 As shown, the first filter unit group 3 and the second filter unit group 4 do not share the same column with the third filter unit group 5. Specifically, the third center connection line S3 of each third projection pattern 50 corresponding to a group of third filter unit groups 5 is located between the first center connection lines S1 of each first projection pattern 30 corresponding to an adjacent group of second filter unit groups 4; or, the third center connection line S3 of each third projection pattern 50 corresponding to a group of third filter unit groups 5 is located between the second center connection lines S2 of each second projection pattern 40 corresponding to an adjacent group of second filter unit groups 4.

[0091] The third center line S3 is located between adjacent first center lines S1, and the third projection pattern 50 overlaps with the first projection patterns 30 in two adjacent first filter unit groups 3, forming a first overlapping area 211. Here, the first light shielding portion 321 and the first sub-light shielding portion 521 are both located in the first overlapping area 211. On this basis, the first overlapping area 211 is provided with a second branch portion 43, forming an overlap of the three to form a first light shielding structure 61.

[0092] Similarly, the third center line is located between two adjacent second center lines, and the third projection pattern 50 overlaps with the second projection patterns 40 in two adjacent second filter unit groups 4, forming a second overlapping area 212. Here, the second light shielding portion 421 and the second sub-light shielding portion 522 are both located in the second overlapping area 212. On this basis, the second overlapping area 212 is provided with a first branch portion 33, forming an overlap of the three to form a second light shielding structure 62.

[0093] In some embodiments, Fig. 9 As shown, the first projection pattern 30 and the second projection pattern 40 are divided into a plurality of projection units 7, each projection unit 7 includes a pair of first projection patterns 30 and second projection patterns 40 adjacent to each other in the first direction X, and another pair of first projection patterns 30 and second projection patterns 40 adjacent to the pair of first projection patterns 30 and second projection patterns 40 in the second direction Y, and the first projection patterns 30 and second projection patterns 40 between the two pairs are adjacent to each other. The first projection patterns 30 and the second projection patterns 40 in the projection unit 7 are staggered.

[0094] Taking one projection unit 7 as an example, it includes the j-th projection pattern (second projection pattern 40) and the j+1-th projection pattern (first projection pattern 30) in the i-th row, and the j-th projection pattern (first projection pattern 30) and the j+1-th projection pattern (second projection pattern 40) in the i+1-th row. i and j are both positive integers greater than or equal to 1.

[0095] Optionally, for any projection unit 7 , a length of a line L1 connecting the centers of the two first projection patterns 30 is equal to a length of a line L2 connecting the centers of the two second projection patterns 40 .

[0096] Optionally, for any projection unit 7, the center lines of the adjacent first projection patterns 30 and second projection patterns 40 form a square frame 80; the center of the third projection pattern 50 is located in the square frame 80. Optionally, the first projection pattern 30 and the second projection pattern 40 are circular, and the contours of the first projection pattern 30 and the second projection pattern 40 are circumscribed, then the side length of the square frame 80 is the distance between the centers of the first projection pattern 30 and the second projection pattern 40, that is, the sum of the radii (R1+R2) of the two. Figure 8 As shown, the center distance between the two closest first projection patterns 30 in the same row is the sum of the diameter of the first projection pattern 30 and the diameter of the second projection pattern 40; the center distance between the two closest second projection patterns 40 in the same row is the sum of the diameter of the first projection pattern 30 and the diameter of the second projection pattern 40; the center distance between the two closest first projection patterns 30 in the same column is the sum of the diameter of the first projection pattern 30 and the diameter of the second projection pattern 40; the center distance between the two closest second projection patterns 40 in the same column is the sum of the diameter of the first projection pattern 30 and the diameter of the second projection pattern 40.

[0097] Optionally, the radius R1 of the first projection pattern 30 is less than or equal to the radius R2 of the second projection pattern 40. It should be noted that the size (such as radius or side length, etc.) of the so-called "projection pattern" in the present disclosure is the size of the actual structure corresponding to the projection pattern, for example, the radius R1 of the first projection pattern 30 is the radius of the first main body 32, the radius R2 of the second projection pattern 40 is the radius of the second main body 42, and the radius R3 of the third projection pattern 50 is the radius of the third filter unit 51.

[0098] Each of the first projection patterns 30 and each of the second projection patterns 40 in the projection unit 7 overlaps with the third projection pattern 50. The overlapping area 21 between the first projection pattern 30 and the third projection pattern 50 is a first overlapping area 211; and the first overlapping area 211 is relatively arranged in the extension direction of the first diagonal line 801 of the frame 80. The overlapping area 21 between the second projection pattern 40 and the third projection pattern 50 is a second overlapping area 212; and the second overlapping area 212 is relatively arranged in the extension direction of the second diagonal line 802 of the frame 80.

[0099] Optionally, the first main body 32, the second main body 42 and the third filter unit 51 are all regular shapes, such as a circle, that is, the contour shapes of the first projection pattern 30, the second projection pattern 40 and the third projection pattern 50 are all circular. At this time, the center of the third projection pattern 50 coincides with the geometric center of the frame 80, the shape of the first overlapping area 211 where the third projection pattern 50 overlaps with each first projection pattern 30 is consistent, such as a blade shape, and the shape of the second overlapping area 212 where the third projection pattern 50 overlaps with each second projection pattern 40 is consistent, such as a blade shape, that is, the contour shapes of the first light shielding portion 321, the first sub-light shielding portion 521 and the second branch portion 43 are consistent, such as a blade shape, and the contour shapes of the second light shielding portion 421, the second sub-light shielding portion 522 and the first branch portion 33 are consistent, such as a blade shape.

[0100] Optionally, the contours of any adjacent first projection patterns 30 and second projection patterns 40 are circumscribed; the contours of any adjacent two third projection patterns 50 are circumscribed, thereby increasing the dense arrangement of the first main body portion 32 and the second main body portion 42. On the premise of ensuring a certain light-shielding portion, the light-transmitting area of ​​the first light-transmitting portion 322 and the second light-transmitting portion 422 can be increased, which is beneficial to increasing the light-emitting area of ​​the pixel openings of the first sub-pixel R and the second sub-pixel B.

[0101] Optionally, the contour of the third projection pattern 50 is an inscribed circle of the frame 80, so as to realize a dense arrangement among the third filter unit 51, the first main body 32 and the second main body 42. On the premise of ensuring a certain light-shielding portion, the light-transmitting area of ​​the third light-transmitting portion 53 can be increased, thereby facilitating increasing the light-emitting area of ​​the pixel opening of the third sub-pixel G.

[0102] Here, the contour figure of the third projection pattern 50 is the inscribed circle of the square frame 80. The shape of the first overlapping area 211 where the third projection pattern 50 overlaps with the first projection pattern 30 is a "leaf" shape, which is formed by splicing a quarter arc of the first projection pattern 30 and the first arc m1 of the third projection pattern 50, wherein the arc angle of the first arc m1 is α1. The first light shielding portion 321, the first sub-light shielding portion 521 and the second branch portion 43 are all located in the first overlapping area 211. The position and pattern shape of the first overlapping area 211 are also the position and shape of the first light shielding portion 321, the first sub-light shielding portion 521 and the second branch portion 43. The shape of the second overlapping area 212 where the third projection pattern 50 overlaps with the second projection pattern 40 is a "leaf" shape, which is formed by splicing a quarter arc of the second projection pattern 40 and the second arc m2 of the third projection pattern 50, wherein the arc angle of the second arc m2 is α2. α2>α1, α1+α2=180°. The first arc m1 of the third projection pattern 50 is connected to the second arc m2 to form a semicircular arc of the third projection pattern. Here, the second light shielding portion 421, the second sub-light shielding portion 522 and the first branch portion 33 are all located in the second overlapping area 212; the position and pattern shape of the second overlapping area 212 are also the positions and shapes of the second light shielding portion 421, the second sub-light shielding portion 522 and the first branch portion 33. Figure 3 As shown, for any first filter unit 31, it is composed of a circular first main body 32 and four pairs of first branch portions 33a in the shape of "leafs" surrounding the first main body 32. The positions of the four pairs of first branch portions 33a are respectively located at 0°, 90°, 180° and 270° of the edge of the first main body 32 with the center O1 of the first main body 32 as the origin. Each pair of first branch portions 33a includes two symmetrically arranged first branch portions 33, and the symmetry axis thereof is the extension line of the line connecting the intersection of the two and the center O1 of the first main body 32. Figure 5 As shown, for any second filter unit 41, it is composed of a circular second main body 42, and four pairs of second branch portions 43a in the shape of "leafs" surrounding the second main body 42. The positions of the four pairs of second branch portions 43a are respectively located at 0°, 90°, 180° and 270° on the edge of the second main body 42 with the center O2 of the second main body 42 as the origin. Each pair of second branch portions 43a includes two symmetrically arranged second branch portions 43, and the axis of symmetry thereof is the extension line of the line connecting the intersection of the two and the center O2 of the second main body 42.

[0103] Optionally, the radius R3 of the third projection pattern 50 is equal to half of the sum of the radius R1 of the first projection pattern 30 and the radius R2 of the second projection pattern 40. That is, R3 = 1 / 2×(R1+R2).

[0104] Optionally, the maximum distance between the two curved edges of the blade shape of the third projection pattern 50 overlapping the first projection pattern 30 is a; the maximum distance between the two curved edges of the blade shape of the third projection pattern 50 overlapping the second projection pattern 40 is b; a is less than b. The value of a determines the size of the first light shielding portion 321, the first sub-light shielding portion 521 and the second branch portion 43; the value of b determines the size of the second light shielding portion 421, the second sub-light shielding portion 522 and the first branch portion 33.

[0105] Optionally, the diameter (2*R3) of the third projection pattern 50 is greater than or equal to the diameter (2*R1) of the first projection pattern 30. Optionally, the diameter (2*R1) of the first projection pattern 30 and the diameter (2*R3) of the third projection pattern 50 are both smaller than the diameter (2*R2) of the second projection pattern 40. Optionally, the diameter (2*R1) of the first projection pattern 30 and the diameter (2*R3) of the third projection pattern 50 are the same.

[0106] The present disclosure can first determine the opening ratio and opening ratio of the pixel openings of the first sub-pixel R, the second sub-pixel B, and the third sub-pixel G. According to the opening ratio and opening ratio of the pixel openings of the first sub-pixel R, the second sub-pixel B, and the third sub-pixel G, and the spacing between the sub-pixels, the sizes of the first main body 31, the second main body 41, and the third filter unit 51 are determined. The present disclosure does not limit the actual size of each first main body 31, the second main body 41, and the third filter unit 51. The area ratio of the three changes according to the opening ratio of the pixel openings of the first sub-pixel R, the second sub-pixel B, and the third sub-pixel G. The present disclosure does not limit the specific size data.

[0107] The pixel arrangement of the present disclosure takes a circular "diamond" pixel arrangement as an example, and for a pixel unit, it includes a first sub-pixel R, a second sub-pixel B, and two third sub-pixels G. Taking the circular "diamond" pixel arrangement as an example, the ratio of the areas of the pixel openings of the first sub-pixel R, the second sub-pixel B, and the third sub-pixel G is 1:2:1.2; based on this, the ratio of the areas of the first projection pattern 30, the second projection pattern 40, and the third projection pattern 50 is 1:2.5:1.56.

[0108] It should be noted that the pixel arrangement disclosed in the present invention takes a circular “diamond” pixel arrangement as an example, but other arrangements may also be applicable.

[0109] In some embodiments, the present disclosure is not limited to the design shape of the above-mentioned color filter being a certain color, and can be adjusted according to the dark state reflection hue of the display panel. Specifically, the stacking position relationship of each color filter can be adjusted according to the actual dark state reaction hue of the display panel. The first color filter, the second color filter and the third color filter are stacked in sequence in a direction away from the base substrate 1. Example 1, such as Figure 1 As shown, the first color filter may be a red filter R_CF for transmitting red light, the second color filter may be a blue filter B_CF for transmitting blue light, and the third color filter may be a green filter G_CF for transmitting blue light. The shapes of the first color filter, the second color filter, and the third color filter refer to Figure 2 , Figure 4 and Figure 6 . Example 2, according to the reflection hue adjustment result, the first color filter may be a red filter R_CF for transmitting red light, the second color filter may be a green filter G_CF for transmitting green light, and the third color filter may be a blue filter B_CF for transmitting blue light. Example 3, according to the reflection hue adjustment result, the first color filter may be a blue filter B_CF for transmitting blue light, the second color filter may be a red filter R_CF for transmitting red light, and the third color filter may be a green filter G_CF for transmitting green light. Example 4, according to the reflection hue adjustment result, the first color filter may be a blue filter B_CF for transmitting blue light, the second color filter may be a green filter G_CF for transmitting green light, and the third color filter may be a red filter R_CF for transmitting red light. Example 5: According to the reflection hue adjustment result, the first color filter may be a green filter G_CF for transmitting green light, the second color filter may be a red filter R_CF for transmitting red light, and the third color filter may be a blue filter B_CF for transmitting blue light. Example 6: According to the reflection hue adjustment result, the first color filter may be a green filter G_CF for transmitting green light, the second color filter may be a blue filter B_CF for transmitting blue light, and the third color filter may be a red filter R_CF for transmitting red light.

[0110] In some embodiments, such as Figure 1 As shown, the display substrate further includes an encapsulation layer 9 disposed on a side of the color filter structure close to the base substrate 1 . The encapsulation layer 9 covers the sub-pixel layer and is used to encapsulate the first sub-pixel R, the second sub-pixel B and the third sub-pixel G.

[0111] The encapsulation layer 9 may be a single-layer structure or a multi-layer structure. When the encapsulation layer 9 is a multi-layer structure, the encapsulation layer 9 may include a first inorganic encapsulation layer (not shown in the figure), an organic encapsulation layer (not shown in the figure), and a second inorganic encapsulation layer (not shown in the figure) sequentially arranged in a direction away from the base substrate 1, such as silicon nitride SiN+ink+silicon nitride SiN.

[0112] In some embodiments, the display substrate further includes a touch layer disposed on the side of the color film structure away from the encapsulation layer 9. The touch layer includes multiple metal layers and a dielectric layer disposed between two adjacent metal layers. Specifically, the touch layer includes a touch drive electrode, a touch sensing electrode, and a touch insulating layer disposed between the touch drive electrode and the touch sensing electrode. Exemplarily, the touch layer includes a first metal layer, a touch insulating layer, and a second metal layer disposed sequentially in a direction away from the substrate. The touch drive electrode and the touch sensing electrode are usually located in the second metal layer, and the bridging portion is located in the first metal layer. The bridging portion connects the two parts of the touch drive electrode in the second metal layer through a conductive via (in fact, the touch sensing electrodes can also be connected through the bridging portion). Here, the material of the touch insulating layer can be selected from inorganic materials, which can be but not limited to silicon nitride (SiN). The material of the first metal layer and the material of the second metal layer can both be but not limited to titanium / aluminum / titanium (Ti / Al / Ti) composite materials.

[0113] In a second aspect, the embodiments of the present disclosure provide a mask plate set for preparing the display substrate of any one of the first aspects, wherein the mask plate set includes a first mask plate 101 , a second mask plate 102 and a third mask plate 103 .

[0114] like Fig.10 As shown, the first mask plate 101 includes a first opening pattern 1011 for forming a first color filter R_CF. The first opening pattern 1011 is the same as the pattern of the first color filter R_CF. Figure 1 As shown, a pattern including a first color filter R_CF is formed on a side of the encapsulation layer 9 away from the base substrate 1 by using the first mask 101 through a patterning process.

[0115] like Fig.11 As shown, the second mask plate 102 includes a second opening pattern 1021 for forming a second color filter B_CF. The second opening pattern 1021 is the same as the pattern of the second color filter B_CF. Figure 1 As shown, a pattern including the second color filter B_CF is formed on the side of the first color filter R_CF away from the encapsulation layer 9 by using the second mask 102 through a patterning process.

[0116] like Fig.12As shown, the third mask plate 103 includes a third opening pattern 1031 for forming a third color filter G_CF. The third opening pattern 1031 is the same as the pattern of the third color filter G_CF. Figure 1 As shown, a pattern including a third color filter G_CF is formed on a side of the second color filter B_CF away from the first color filter R_CF through a patterning process using the third mask 103 .

[0117] In a third aspect, the embodiments of the present disclosure provide a display device, which includes a display substrate as described in any one of the above embodiments. The display device can be, for example, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a vehicle-mounted device, or any other product with a display function. Other essential components of the display device should be understood by a person of ordinary skill in the art, and will not be described in detail here, nor should they be used as a limitation to the present disclosure.

[0118] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display substrate, comprising a base substrate, a sub-pixel layer and a color filter structure sequentially arranged in a direction away from the base substrate; the sub-pixel layer comprises a first sub-pixel, a second sub-pixel and a third sub-pixel; the color filter structure comprises a first color filter, a second color filter and a third color filter which are stacked; The orthographic projections of the first color filter, the second color filter and the third color filter on the base substrate have overlapping areas and non-overlapping areas; the overlapping areas surround the non-overlapping areas; The first color filter, the second color filter and the third color filter located in the overlapping area are used for light shielding; The orthographic projection of the portion of the first color filter located in the non-overlapping area on the substrate covers the orthographic projection of the first sub-pixel on the substrate; the orthographic projection of the portion of the second color filter located in the non-overlapping area on the substrate covers the orthographic projection of the second sub-pixel on the substrate; the orthographic projection of the portion of the third color filter located in the non-overlapping area on the substrate covers the orthographic projection of the third sub-pixel on the substrate.

2. The display substrate according to claim 1, wherein: The first color filter comprises a plurality of first filter unit groups arranged side by side along a first direction, each of the first filter unit groups comprises a plurality of first filter units arranged side by side along a second direction; the first direction is arranged to intersect with the second direction; The first filter units in adjacent groups of the first filter units are arranged alternately; the first filter units include a first main body and a first branch; the first main body includes a first light shielding portion located in the overlapping area and a first light transmitting portion located in the non-overlapping area; the first branch is located in the overlapping area; The first light-transmitting portion is used for transmitting light, and the first light-shielding portion surrounds the first light-transmitting portion; and the first branch portion is arranged on a side of the first light-shielding portion away from the first light-transmitting portion.

3. The display substrate according to claim 2, wherein: The second color filter comprises a plurality of second filter unit groups arranged side by side along the first direction, and each of the second filter unit groups comprises a plurality of second filter units arranged side by side along the second direction; The second filter units in the adjacent second filter unit groups are arranged alternately; the second filter units include a second main body and a second branch portion; the second main body includes a second light shielding portion located in the overlapping area and a second light transmitting portion located in the non-overlapping area; the second branch portion is located in the overlapping area; The second light-transmitting portion is used for transmitting light, the second light-shielding portion surrounds the second light-transmitting portion, and the second branch portion is arranged on a side of the second light-shielding portion away from the second light-transmitting portion.

4. The display substrate according to claim 3, wherein: The third color filter comprises a plurality of third filter unit groups arranged side by side along the first direction, and each of the third filter unit groups comprises a plurality of third filter units arranged side by side along the second direction; The third light filtering unit comprises a third light shielding portion located in the overlapping area and a third light transmitting portion located in the non-overlapping area, the third light transmitting portion is used for transmitting light, and the third light shielding portion surrounds the third light transmitting portion; The third light shielding portion includes a plurality of first sub-light shielding portions and a plurality of second sub-light shielding portions, and the first sub-light shielding portions and the second sub-light shielding portions are alternately arranged along a surrounding direction surrounding the third light-transmitting portion.

5. The display substrate according to claim 4, wherein: Two first filter units adjacent to each other in an adjacent group of the first filter units, wherein the first branch portion between the two first main bodies is shared, and the shared first branch portion and the first main body connected thereto are used together to define the third light-transmitting portion; two first filter units adjacent to each other in the first direction, wherein the plurality of first branch portions between the two first main bodies and the first main body connected thereto are used together to define the second light-transmitting portion of the second filter unit; Two second filter units adjacent to each other in an adjacent group of second filter units, wherein the second branch portion between the two second main bodies is shared, and the shared second branch portion and the second main body connected thereto are jointly used to define the third light-transmitting portion; two second filter units adjacent to each other in the first direction, wherein the plurality of second branch portions located between the two second main bodies and the second main body connected thereto are jointly used to define the first light-transmitting portion of the first filter unit.

6. The display substrate according to claim 4 or 5, wherein: The orthographic projections of the first light shielding portion, the first sub-light shielding portion and the second branch portion on the base substrate overlap; The orthographic projections of the second light-shielding portion, the second sub-light-shielding portion, and the first branch portion on the base substrate overlap.

7. The display substrate according to claim 6, wherein: The orthographic projection of the first main body on the base substrate is a first projection pattern, and the orthographic projection of the second main body on the base substrate is a second projection pattern; The orthographic projection of the third filter unit on the base substrate is a third projection pattern; The first projection pattern and the second projection pattern are alternately arranged in the first direction and the second direction without overlapping; A third center line connecting each of the third projection patterns corresponding to a group of the third filter unit groups is located between first center lines connecting each of the first projection patterns corresponding to an adjacent group of the second filter unit groups; or, a third center line connecting each of the third projection patterns corresponding to a group of the third filter unit groups is located between second center lines connecting each of the second projection patterns corresponding to an adjacent group of the second filter unit groups.

8. The display substrate according to claim 7, wherein: The first projection pattern and the second projection pattern are divided into a plurality of projection units, each of the projection units including a pair of the first projection pattern and the second projection pattern adjacent to each other in the first direction, and another pair of the first projection pattern and the second projection pattern adjacent to the pair of the first projection pattern and the second projection pattern in the second direction; For any of the projection units, the center lines connecting the two adjacent first projection patterns and the second projection patterns form a square frame; the center of the third projection pattern is located in the square frame.

9. The display substrate according to claim 8, wherein: The center of the third projection pattern coincides with the geometric center of the frame.

10. The display substrate according to claim 9, wherein: The outlines of the first projection pattern, the second projection pattern and the third projection pattern are all circular; The contours of any adjacent first projection patterns and the second projection pattern are circumscribed; the contours of any adjacent two third projection patterns are circumscribed.

11. The display substrate according to claim 10, wherein: The contour figure of the third projection pattern is an inscribed circle of the square frame.

12. The display substrate according to claim 11, wherein: The diameter of the third projection pattern is greater than or equal to the diameter of the first projection pattern; the diameter of the third projection pattern and the diameter of the first projection pattern are both smaller than the diameter of the second projection pattern.

13. The display substrate according to claim 10, wherein: For any of the projection units, the third projection pattern overlaps with the first projection pattern to form a first overlapping area, and the first overlapping area is relatively arranged in the extension direction of the first diagonal line of the square frame; the third projection pattern overlaps with the second projection pattern to form a second overlapping area, and the second overlapping area is relatively arranged in the extension direction of the second diagonal line of the square frame; The first overlapping area is a closed figure formed by connecting a first arc in the third projection pattern and a quarter of the arc in the first projection pattern end to end; The second overlapping area is a closed figure formed by connecting a second arc of the third projection pattern and a quarter arc of the second projection pattern end to end; wherein the first arc and the second arc are spliced ​​to form a semicircular arc of the third projection pattern; The first light shielding portion, the first sub-light shielding portion and the second branch portion are located in the first overlapping area; The second light shielding portion, the second sub-light shielding portion and the first branch portion are located in the second overlapping area.

14. The display substrate according to claim 13, wherein: For any first filter unit, the plurality of first branch portions are divided into four pairs of first branch portion pairs, which are respectively located at the boundary positions of 0°, 90°, 180° and 270° of the first main body; each pair of the first branch portion pairs includes two symmetrically arranged first branch portions, and the axis of symmetry thereof is the extension line of the line connecting the intersection of the two and the center of the first main body; the endpoints of the first branch portions are connected to the endpoints of the first light shielding portion; For any second filtering unit, multiple second branch portions are divided into four pairs of second branch portion pairs, which are respectively located at the boundary positions of 0°, 90°, 180° and 270° of the second main body; each pair of second branch portion pairs includes two symmetrically arranged second branch portions, and its axis of symmetry is the extension line of the line connecting the intersection of the two and the center of the second main body; the endpoints of the second branch portion are connected to the endpoints of the second shading portion.

15. A display device comprising the display substrate according to any one of claims 1 to 14.

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