Display substrate and display apparatus

Abstract

The present disclosure belongs to the technical field of display. Provided are a display substrate and a display apparatus. The display substrate of the present disclosure comprises a first color filter, a second color filter and a third color filter, wherein the orthographic projections of the first color filter, the second color filter and the third color filter on a base substrate have overlapping regions and non-overlapping regions; the overlapping regions surround the non-overlapping regions; the first color filter, the second color filter and the third color filter located in the overlapping regions are used for shielding light; the orthographic projections of portions of the first color filter located in the non-overlapping regions on the base substrate cover the orthographic projections of first sub-pixels on the base substrate; the orthographic projections of portions of the second color filter located in the non-overlapping regions on the base substrate cover the orthographic projections of second sub-pixels on the base substrate; and the orthographic projections of portions of the third color filter located in the non-overlapping regions on the base substrate cover the orthographic projections of third sub-pixels on the base substrate.

Description

A display substrate and a display device Technical Field

[0001] This disclosure belongs to the field of display technology, specifically relating to a display substrate and a display device. Background Technology

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

[0003] It involves forming color filters on the encapsulation layer, corresponding to sub-pixels, and setting a black matrix (BM) in the gaps between the sub-pixels, i.e., the pixel define layer (PDL), to effectively absorb light, thereby improving display transmittance while reducing ambient light reflection. However, due to fluctuations in the manufacturing process, gaps inevitably occur between each color filter and the black matrix. These gaps, when the screen is off and illuminated by an external point light source, cause diffraction, creating a large aperture. Furthermore, as the shape of the color filter changes, the light diffraction pattern also changes, forming varying degrees of "X"-shaped rays. Summary of the Invention

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

[0005] In a first aspect, the technical solution adopted to solve the technical problem of this disclosure is a display substrate, which includes a substrate, a sub-pixel layer and a color filter structure disposed sequentially along a direction away from the 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 stacked together.

[0006] The first color filter, the second color filter, and the third color filter have overlapping and non-overlapping regions when projected onto the substrate; the overlapping region surrounds the non-overlapping region.

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

[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 multiple groups of first filter units arranged side by side along a first direction, and each group of first filter units includes multiple first filter units arranged side by side along a second direction; the first direction and the second direction are intersected.

[0010] The first filter units in adjacent groups of the first filter unit are staggered; each first filter unit includes a first main body and a first branch; the first main body includes a first light-shielding part located in the overlapping area and a first light-transmitting part 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; the first branch portion is disposed on the 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 a first direction, and each group of second filter unit groups includes a plurality of second filter units arranged side by side along a second direction;

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

[0014] The second light-transmitting part is used for light transmission, the second light-shielding part surrounds the second light-transmitting part, and the second branch part is disposed on the side of the second light-shielding part away from the second light-transmitting part.

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

[0016] The third filter unit includes a third light-shielding part located in the overlapping area and a third light-transmitting part located in the non-overlapping area. The third light-transmitting part is used to transmit light, and the third light-shielding part surrounds the third light-transmitting part.

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

[0018] In some embodiments, two first filter units in an adjacent group of first filter units are staggered, wherein a first branch between two first main bodies is shared, and the shared first branch and the first main body connected thereto are used together to define the third light-transmitting portion; two first filter units adjacent in the first direction, wherein a plurality of first branches located between 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] In the adjacent group of the second filter units, two second filter units that are staggered and adjacent to each other are shared by the second branch between the two second main bodies, and the shared second branch and the second main body connected thereto are used together to define the third light-transmitting part; in the first direction, two second filter units that are adjacent to each other are shared by the multiple second branches between the two second main bodies and the second main bodies connected thereto, and are used together to define the first light-transmitting part 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 substrate overlap; the orthographic projections of the second light-shielding portion, the second sub-light-shielding portion, and the first branch portion on the substrate overlap.

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

[0022] The first projection pattern and the second projection pattern are alternately arranged in both the first direction and the second direction, and do not overlap;

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

[0024] In some embodiments, the first projection pattern and the second projection pattern are divided into a plurality of projection units, each projection unit including a pair of first projection patterns and second projection patterns adjacent in the first direction, and another pair of first projection patterns and second projection patterns adjacent to the pair of first projection patterns and second projection patterns in the second direction.

[0025] For any of the projection units, the center lines connecting the centers of the first projection patterns and the second projection patterns that are adjacent to each other form a square; the center of the third projection pattern is located within the square.

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

[0027] In some embodiments, the outlines of the first projection pattern, the second projection pattern, and the third projection pattern are all circular.

[0028] The outlines of any two adjacent first projection patterns are externally tangent to the outlines of the second projection pattern; the outlines of any two adjacent third projection patterns are externally tangent to each other.

[0029] In some embodiments, the outline of the third projection pattern is the inscribed circle of the box.

[0030] In some embodiments, the diameter of the third projection pattern is greater than or equal to the diameter of the first projection pattern; the diameter of both the third projection pattern and the diameter of the first projection pattern are smaller than the 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 disposed opposite to each other in the extension direction of the first diagonal of the frame; the third projection pattern overlaps with the second projection pattern to form a second overlapping area, and the second overlapping area is disposed opposite to each other in the extension direction of the second diagonal of the frame.

[0032] The first overlapping area is a closed shape formed by connecting a segment of the first arc in the third projection pattern and a quarter arc of the first projection pattern end to end; the second overlapping area is a closed shape formed by connecting a segment of the second arc in 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 ​​together to form a semi-circular arc of the third projection pattern.

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

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

[0035] For any second filter unit, the plurality of second branches are divided into four pairs of second branch pairs, which are located at the boundary positions of 0°, 90°, 180° and 270° of the second main body, respectively; each pair of second branch pairs includes two second branches arranged symmetrically, and the axis of symmetry is the extension line of the line connecting the intersection of the two branches and the center of the second main body; the endpoint of the second branch is connected to the endpoint of the second light-shielding part.

[0036] In a second aspect, embodiments of this disclosure provide a display device comprising a display substrate as described in any one of the first aspects. Attached Figure Description

[0037] Figure 1 is a schematic diagram of the film layers of the display substrate provided in an embodiment of this disclosure;

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

[0039] Figure 3 is a plan view of a single first filter unit provided in an embodiment of this disclosure.

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

[0041] Figure 5 is a plan view of a single second filter unit provided in an embodiment of this disclosure;

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

[0043] Figure 7 is a plan view of a single third filter unit provided in an embodiment of this disclosure;

[0044] Figure 8 is a partial plan view of the three-layer color filter stacking provided in the embodiment of this disclosure;

[0045] Figure 9 is a schematic diagram of the projection unit provided in an embodiment of this disclosure;

[0046] Figure 10 is a partial plan view of the first mask plate provided in an embodiment of this disclosure;

[0047] Figure 11 is a partial plan view of the second mask plate provided in an embodiment of this disclosure;

[0048] Figure 12 is a partial plan view of the third mask provided in an embodiment of this disclosure. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0050] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0051] In this disclosure, "multiple or several" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0052] It should be noted that in this disclosure, the first direction X, the second direction Y, and the third direction Z intersect each other. In this 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 horizontal, the second direction Y is vertical, and the third direction Z is vertical, which is perpendicular to the plane where the substrate is located. However, this does not constitute a limitation on this disclosure.

[0053] In a first aspect, embodiments of this disclosure provide a display substrate, as shown in Figures 1 to 6. The display substrate includes a substrate 1, a sub-pixel layer and a color filter structure sequentially disposed along a direction away from the 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 stacked together. The first sub-pixel R, the second sub-pixel B, and the third sub-pixel G emit different colors. The first color filter R_CF is mainly disposed 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 disposed 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 disposed 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] For example, 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. This disclosure uses the example of a first sub-pixel R being a red sub-pixel, a second sub-pixel B being a blue sub-pixel, and a third sub-pixel G being a green sub-pixel. Correspondingly, the first color filter R_CF is a red filter (transmits red light), the second color filter B_CF is a blue filter (transmits blue light), and the third color filter G_CF is a green filter (transmits green light). Of course, this disclosure is not limited to this case; for example, the second sub-pixel could be a green sub-pixel, and the third sub-pixel a blue sub-pixel; correspondingly, the second color filter could be a green filter, and the third color filter a blue filter. These are not all listed 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 onto the substrate 1 have an overlapping region 21 and a non-overlapping region 22. The overlapping region 21 surrounds the non-overlapping region 22. Specifically, the overlapping position of the orthographic projections of the first color filter R_CF, the second color filter B_CF, and the third color filter G_CF onto the substrate 1 is denoted as the overlapping region 21, and the other positions are designated as the non-overlapping region 22. The three color filters R_CF, B_CF, and G_CF located in the overlapping region 21 are stacked to form a light-shielding structure, which can be used to block light and prevent color mixing between adjacent sub-pixels. This light-shielding structure is equivalent to a black matrix (BM).

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

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

[0058] For example, the display substrate further includes a pixel defining layer (PDL), which includes pixel openings 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 openings in the pixel defining layer (PDL) onto the substrate 1 is located within the orthographic projection of the non-overlapping region 22 onto the substrate 1.

[0059] This embodiment of the invention only uses three stacked color filters and does not include a black matrix (BM). However, the stacked structure of the three color filters in the overlap region 21 serves as a light-shielding structure, effectively preventing color mixing between adjacent sub-pixels. Compared to existing technologies, this embodiment eliminates the need for a black matrix (BM), thus saving on the black matrix fabrication process (e.g., reducing one black matrix (BM) mask process), improving process efficiency, and reducing process costs. Simultaneously, it eliminates the gap between the color filters and the black matrix, directly eliminating light diffraction in dark conditions, thereby reducing optical defects caused by changes in the shape of the color filters and other optical diffraction.

[0060] In some embodiments, as shown in Figures 2 and 3, the first color filter R_CF includes a group of first filter units 3 arranged side-by-side along a first direction X. Each group of first filter units 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 intersected, for example, the first direction X and the second direction Y are perpendicular. The first filter units 31 in adjacent groups of first filter units 3 are staggered. The first filter unit 31 includes a first main body 32 and a first branch 33. The first main body 32 includes a first light-shielding part 321 located in the overlapping area 21 and a first light-transmitting part 322 located in the non-overlapping area 22. The first branch 33 is located in the overlapping area 21. The first light-transmitting part 322 is used for light transmission, that is, for transmitting red light emitted by the first sub-pixel R. The first light-shielding part 321 surrounds the first light-transmitting part 322, and the first branch 33 is located on the side of the first light-shielding part 321 away from the first light-transmitting part 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 form part of the light-shielding structure (such as the first light-shielding structure 61 in FIG8 below).

[0061] Optionally, the orthographic projection of the first main body 32 onto the substrate 1 is a first projection pattern 30. For any group of first filter units 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 also the center O1 of the first main body portion 32 and the center O1 of the first filter unit 31. Optionally, the orthographic projection of the first light-transmitting portion 322 on the substrate 1 at least partially overlaps 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 enabling 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 their orthographic projections on the substrate 1 overlap.

[0063] Optionally, the first filter unit 31 is a centrally symmetrical pattern. Optionally, the first main body portion 32 is a centrally symmetrical pattern. Optionally, the first light-transmitting portion 322 is a centrally symmetrical pattern. Optionally, the pattern formed by the plurality of first light-blocking portions 321 in the first main body portion 32 is a centrally symmetrical pattern centered on the center of the first main body portion 32. The pattern formed by the plurality of first branch portions 33 in the first filter unit 31 is a centrally symmetrical pattern centered on the center of the first main body portion 32.

[0064] Optionally, the outline shape of the orthographic projection of the first main body 32 onto the substrate 1 is circular. Optionally, the outline shape of the orthographic projection of the first light-shielding part 321 onto the substrate 1 is blade-shaped. Here, "blade-shaped" refers to a closed shape formed by connecting two arc segments (such as minor arcs) end to end. Optionally, the outline shape of the orthographic projection of the first light-transmitting part 322 onto the substrate 1 is approximately square, with all four sides being concave curved edges that curve inward toward the center O1, and the side lengths being equal. At the same time, the blade curved edges of the first light-shielding part 321 are convex curved edges; the concave curved edges coincide with one blade curved edge of the first light-shielding part 321 near the center O1. Optionally, the first main body 32 includes four blade-shaped first light-shielding parts 321 and one approximately square first light-transmitting part 322; the four first light-shielding parts 321 are respectively disposed corresponding to the four concave curved edges of the first light-transmitting part 322, forming a circular first main body 32. Specifically, the four blade edges of the four first light-blocking parts 321 near the center O1 overlap with the four concave curved edges of the first light-transmitting part 322, forming a first main body part 32 with four first light-blocking parts 321 surrounding a first light-transmitting part 322.

[0065] Optionally, a first filter unit 31 includes a plurality of first branches 33, which surround the first main body 32. Optionally, for a first filter unit 31, the plurality of first branches 33 are divided into multiple pairs of first branch pairs 33a, each pair of first branch pairs 33a including two symmetrically arranged first branches 33, whose axis of symmetry is the extension of the line connecting the intersection of the two branches to the center O1 of the first main body 32. The extension direction of this extension line is either a first direction X or a second direction Y. For example, a first filter unit 31 may include eight first branches 33, divided into four pairs of first branch pairs 33a, wherein two pairs of first branch pairs 33a are arranged opposite each other in the first direction X and are symmetrically arranged about a center line extending along the second direction Y and passing through the center of the first main body 32. The other two pairs of first branch pairs 33a are arranged opposite each other in the second direction Y and are symmetrically arranged about a center line extending along the first direction X and passing through the center of the first main body 32.

[0066] Optionally, the outline shape of the first branch 33 projected onto the substrate 1 is blade-shaped. Here, "blade-shaped" refers to a closed shape formed by connecting two arc segments (such as minor arcs) end to end. For a pair of first branch pairs 33a, the blade edge away from the axis of symmetry in one first branch 33 and the blade edge away from the axis of symmetry in the other first branch 33 have the same arc length and the same curvature, and the two connect to form a semicircular arc with a radius of R2. For a first filter unit 31, the number of first branch pairs 33a is the same as the number of first light-shielding parts 321. A first light-shielding part 321 is provided between two adjacent first branch pairs 33 in two adjacent pairs of first branch pairs 33a. The intersection point of the two curved edges of the blades in the first branch 33 (i.e., the endpoint of the first branch 33) is the same as the intersection point of the two curved edges of the blades in the first light-shielding part 321 (i.e., the endpoint of the first light-shielding part 321), which is the vertex of the square-like first light-transmitting part 322. The first branch 33 and the first light-shielding part 321 are connected at the intersection point of the blade curved edges. For two adjacent pairs of first branch pairs 33a, the blade curved edge of the first branch 33 that is far away from the other first branch 33 is connected to the blade curved edge of the first light-shielding part 321 near the center O1 to form a semi-circular arc with a radius of R3.

[0067] Optionally, the first branch 33, the first light-shielding part 321, and the first light-transmitting part 322 are connected as an integrally formed structure.

[0068] Optionally, in adjacent first filter units 31 of the first filter unit group 3, two interleaved first filter units 31 share a common first branch 33 between two first main body portions 32, such as first branch 331 and first branch 332. The shared first branch 331 and first branch 332, together with the two connected first main body portions 32, form an inner closed area that is a portion of a non-overlapping area 22 (denoted as 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 adjacent first filter units 31 in the first direction X, a portion of a non-overlapping area 22 (denoted as second non-overlapping sub-area 222) is formed by a plurality of first branches 33 located between two first main body portions 32, which is used to define the second light-transmitting portion 422 of the second filter unit 41.

[0069] In some embodiments, as shown in Figures 4 and 5, the second color filter B_CF includes multiple groups of second filter units 4 arranged side by side along a first direction X, and each group of second filter units 4 includes multiple second filter units 41 arranged side by side along a second direction Y; the second filter units 41 in adjacent groups of second filter units 4 are staggered; the second filter unit 41 includes a second main body portion 42 and a second branch portion 43; the second main body portion 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 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 disposed on the side of the second light-shielding portion 421 away from the second light-transmitting portion 422. Since the second light-shielding part 421 and the second branch part 43 are both located in the overlapping area 21, the second light-shielding part 421 and the second branch part 43 overlap with other color filters to form part of the light-shielding structure (such as the second light-shielding structure 62 in FIG8 below).

[0070] Optionally, the orthographic projection of the second main body 42 onto the substrate 1 is a second projection pattern 40. For any group of second filter units 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 also the center O2 of the second main body portion 42 and the center O2 of the second filter unit 41. Optionally, the orthographic projection of the second light-transmitting portion 422 on the substrate 1 at least partially overlaps with the orthographic projection of the second sub-pixel B on the substrate 1. Specifically, the orthographic projection of the second light-transmitting portion 422 on the substrate 1 covers the orthographic projection of the second sub-pixel B on the substrate 1, thereby enabling 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 their orthographic projections on the substrate 1 overlap.

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

[0073] Optionally, the outline shape of the orthographic projection of the second main body 42 onto the substrate 1 is circular. Optionally, the outline shape of the orthographic projection of the second light-shielding part 421 onto the substrate 1 is blade-shaped. Here, "blade-shaped" refers to a closed shape formed by connecting two arc segments (such as minor arcs) end to end. Optionally, the outline shape of the orthographic projection of the second light-transmitting part 422 onto the substrate 1 is approximately square, with all four sides being concave curved edges that curve inward toward the center O2, and the side lengths being equal. At the same time, the blade curved edges of the second light-shielding part 421 are convex curved edges; the concave curved edges coincide with one blade curved edge of the second light-shielding part 421 near the center O2. Optionally, the second main body 42 includes four blade-shaped second light-shielding parts 421 and one approximately square second light-transmitting part 422; the four second light-shielding parts 421 are respectively disposed corresponding to the four concave curved edges of the second light-transmitting part 422, forming a circular second main body 42. Specifically, the four blade edges of the four second light-blocking portions 421 near the center O2 respectively coincide with the four concave curved edges of the second light-transmitting portion 422, forming a second main body portion 42 with four second light-blocking portions 421 surrounding a second light-transmitting portion 422.

[0074] Optionally, a second filter unit 41 includes a plurality of second branches 43, which surround the second main body 42. Optionally, for a second filter unit 41, the plurality of second branches 43 are divided into multiple pairs of second branch pairs 43a, each pair of second branch pairs 43a including two symmetrically arranged second branches 43, the axis of symmetry being the extension of the line connecting the intersection of the two branches and the center of the second main body 42. The extension direction of this extension line is either a first direction X or a second direction Y. For example, a second filter unit 41 includes eight second branches 43, divided into four pairs of second branch pairs 43a, wherein two pairs of second branch pairs 43a are arranged opposite each other in the first direction X and symmetrically arranged about a center line extending along the second direction Y and passing through the center of the second main body 42 as the axis of symmetry. The other two pairs of second branch pairs 43a are arranged opposite each other in the second direction Y and symmetrically arranged about a center line extending along the first direction X and passing through the center of the second main body 42 as the axis of symmetry.

[0075] Optionally, the outline shape of the orthographic projection of the second branch 43 onto the substrate 1 is blade-shaped. Here, "blade-shaped" refers to a closed shape formed by connecting two arc segments (such as minor arcs) end to end. For a pair of second branch pairs 43a, the blade curved edge away from the axis of symmetry in one second branch 43 and the blade curved edge away from the axis of symmetry in the other second branch 43 have the same arc length and the same radii, and the two are connected to form a semi-circular arc with a radius of R1. For a second filter unit 41, the number of second branch pairs 43a is the same as the number of second light-shielding parts 421. A second light-shielding part 421 is provided between two adjacent second branch pairs 43a. The intersection point of the two blade curved edges in the second branch 43 is the same as the intersection point of the two blade curved edges in the second light-shielding part 421, that is, the vertex of the square-like second light-transmitting part 422. The second branch 43 and the second light-shielding part 421 are connected at the intersection point of the blade curved edges. For two adjacent second branches 43 in two pairs of adjacent second branch pairs 43a, the blade edge of the second branch 43 that is far from the other second branch 43 is connected to the blade edge of the second shading part 421 near the center O2 to form a semi-circular arc with a radius of 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 43, the second light-shielding part 421, and the second light-transmitting part 422 are connected as an integrally formed structure.

[0077] Optionally, in adjacent groups of second filter units 41, two interleaved second filter units 41 share a common second branch 43 between two second main bodies 42, such as second branch 431 and second branch 432. The shared second branch 431 and second branch 432, together with the two connected second main bodies 42, form a partially non-overlapping region 22 (denoted as third non-overlapping sub-region 223), which is used to define the third light-transmitting portion 53 of the third filter unit 51. Optionally, in two adjacent second filter units 41 in the first direction X, a partially non-overlapping region 22 (denoted as fourth non-overlapping sub-region 224) is formed by a plurality of second branches 43 located between two second main bodies 42, which is used to define the first light-transmitting portion 322 of the first filter unit 31.

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

[0079] Optionally, the orthographic projection of the third filter unit 51 onto the substrate 1 is a third projection pattern 50. For any group of third filter units 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 units 5, the center line connecting adjacent third projection patterns 50 extends along the first direction X.

[0080] Optionally, the third filter unit 51 in the third color filter G_CF is arranged in an array, that is, it includes 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 1 at least partially overlaps with the orthographic projection of the third sub-pixel G on the substrate 1. For example, the orthographic projection of the third light-transmitting portion 53 on the substrate 1 covers the orthographic projection of the third sub-pixel G on the substrate 1, thereby enabling 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 their orthographic projections on the substrate 1 overlap.

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

[0083] Optionally, the outline shape of the orthographic projection of the third filter unit 51 onto the substrate 1 is circular. Optionally, the outline shape of the orthographic projection of the first sub-shielding part 521 onto the substrate 1 is blade-shaped. The outline shape of the orthographic projection of the second sub-shielding part 522 onto the substrate 1 is blade-shaped. Here, "blade-shaped" refers to a closed shape formed by connecting two arc segments (such as minor arcs) end to end. The blade area of ​​the first sub-shielding part 521 is smaller than the blade area of ​​the second sub-shielding part 522. Optionally, the outline shape of the orthographic projection of the third light-transmitting part 53 onto the substrate 1 is a near-rectangular shape, with all four sides being concave curved edges that curve inward toward the center O3, and the arc lengths of the oppositely arranged concave curved edges are equal. The third light-filtering unit 51 includes two opposing blade-shaped first sub-shielding portions 521, two opposing blade-shaped second sub-shielding portions 522, and a rectangular third light-transmitting portion 53. The long concave curved edge 531 of the rectangular portion corresponds to the second sub-shielding portion 522, and the long concave curved edge 531 coincides with the blade curved edge of the second sub-shielding portion 522 near the center O3. The short concave curved edge 532 of the rectangular portion corresponds to the first sub-shielding portion 521, and the short concave curved edge 532 coincides with the blade curved edge of the first sub-shielding portion 521 near the center O3. The two first sub-shielding portions 521 and the two second sub-shielding portions 522 alternately surround the third light-transmitting portion 53, forming a circular third light-filtering unit 51.

[0084] Optionally, the first sub-shading part 521, the second sub-shading part 522 and the third light-transmitting part 53 are connected as an integral structure.

[0085] Optionally, a third filter unit 51 includes two opposing first sub-shielding portions 521 and two opposing second sub-shielding portions 522, with the first sub-shielding portions 521 and the second sub-shielding portions 522 alternately arranged along a circumferential direction surrounding the third light-transmitting portion 53. The two opposing first sub-shielding portions 521 are axially symmetrical about the line connecting their centers, which passes through the center of the third light-transmitting portion 53. The two opposing second sub-shielding portions 522 are also axially symmetrical about the line connecting their centers, which passes through the center of the third light-transmitting portion 53. Optionally, the line connecting the centers of the two opposing first sub-shielding portions 521 is perpendicular to the line connecting the centers of the two opposing second sub-shielding portions 522. Optionally, in the four third filter units 51 that are arranged in a ring shape in pairs in the row and column directions, the inner closed area formed by the four first sub-shielding parts 521 between the four third light-transmitting parts 53 is a part of the non-overlapping area 22 (denoted as the fifth non-overlapping sub-area 225) used to define the first light-transmitting part 322, and the inner closed area formed by the four second sub-shielding parts 522 between the four third light-transmitting parts 53 is a part of the non-overlapping area 22 (denoted as the sixth non-overlapping sub-area 226) used to define the second light-transmitting part 422.

[0086] In conjunction with the above-described embodiments of the first color filter R_CF, the second color filter B_CF, and the third color filter G_CF, further, as shown in FIG8, 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 these three are stacked to form the 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 these three are stacked to form the second light-shielding structure 62.

[0087] In some embodiments, as shown in FIG8, the first projection pattern 30 and the second projection pattern 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, the line connecting the centers of any two adjacent first projection patterns 30 and second projection patterns 40 extends along the first direction X. In the second direction Y, the line connecting the centers of any two adjacent first projection patterns 30 and second projection patterns 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 pattern 30 and the second projection pattern 40 are alternately arranged, that is, the first projection pattern 30 in adjacent columns of the first filter unit group 3 is staggered, and the second projection pattern 40 in adjacent columns of the second filter unit group 4 is staggered. Optionally, adjacent first projection patterns 30 and second projection patterns 40 are in contact.

[0090] Continuing as shown in Figure 8, the first filter unit group 3 and the second filter unit group 4 do not share the same column as the third filter unit group 5. Specifically, the third center line S3 of each third projection pattern 50 corresponding to a group of third filter unit groups 5 is located between the first center lines S1 of each first projection pattern 30 corresponding to an adjacent group of second filter unit groups 4; or, the third center line S3 of each third projection pattern 50 corresponding to a group of third filter unit groups 5 is located between the second center 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. The third projection pattern 50 overlaps with the first projection pattern 30 in the two adjacent first filter unit groups 3, forming a first overlap area 211. Here, the first light-shielding part 321 and the first sub-light-shielding part 521 are both located in the first overlap area 211. Based on this, the first overlap area 211 is provided with a second branch 43, forming a three-way overlap to constitute the 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 pattern 40 in the two adjacent groups of second filter units 4, forming a second overlapping area 212. Here, the second light-shielding part 421 and the second sub-light-shielding part 522 are both located in the second overlapping area 212. Based on this, the second overlapping area 212 is provided with a first branch 33, forming an overlap of the three to constitute the second light-shielding structure 62.

[0093] In some embodiments, as shown in FIG9, 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 in the two pairs are adjacent to each other. The first projection patterns 30 and second projection patterns 40 in the projection unit 7 are staggered.

[0094] Taking a 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, the length of the line connecting the centers of the two first projection patterns 30, L1, is equal to the length of the line connecting the centers of the two second projection patterns 40, L2.

[0096] Optionally, for any projection unit 7, the center lines connecting the centers of any two adjacent first projection patterns 30 and second projection patterns 40 form a rectangle 80; the center of the third projection pattern 50 is located within the rectangle 80. Optionally, the first projection pattern 30 and the second projection pattern 40 are circular, and their outlines are externally tangent. Then, the side length of the rectangle 80 is the distance between the centers of the first projection pattern 30 and the second projection pattern 40, which is the sum of their radii (R1+R2). As shown in Figure 8, the center distance between the two closest first projection patterns 30 in the same row is the sum of the diameters of the first projection pattern 30 and 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 diameters of the first projection pattern 30 and 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 diameters of the first projection pattern 30 and 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 diameters of the first projection pattern 30 and 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 of the "projection pattern" (such as radius or side length) in this 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 within 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 called the first overlapping area 211; and the first overlapping area 211 is arranged opposite to each other in the extension direction of the first diagonal 801 of the frame 80. The overlapping area 21 between the second projection pattern 40 and the third projection pattern 50 is called the second overlapping area 212; and the second overlapping area 212 is arranged opposite to each other in the extension direction of the second diagonal 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 circles, that is, the outlines of the first projection pattern 30, the second projection pattern 40, and the third projection pattern 50 are all circular. In this case, the center of the third projection pattern 50 coincides with the geometric center of the frame 80, and the shape of the first overlap area 211 where the third projection pattern 50 overlaps with each of the first projection patterns 30 is consistent, such as a leaf shape. The shape of the second overlap area 212 where the third projection pattern 50 overlaps with each of the second projection patterns 40 is consistent, such as a leaf shape. That is, the outlines of the first light-shielding part 321, the first sub-light-shielding part 521, and the second branch part 43 are consistent, such as leaf shapes, and the outlines of the second light-shielding part 421, the second sub-light-shielding part 522, and the first branch part 33 are consistent, such as leaf shapes.

[0100] Optionally, the outlines of any adjacent first projection pattern 30 and second projection pattern 40 are externally tangent; the outlines of any two adjacent third projection patterns 50 are externally tangent, thereby increasing the dense arrangement of the first main body 32 and the second main body 42. Under the premise of ensuring a certain amount of light-blocking 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 opening of the first sub-pixel R and the second sub-pixel B.

[0101] Optionally, the outline of the third projection pattern 50 is the inscribed circle of the square 80, which realizes the dense arrangement between the third filter unit 51, the first main body 32 and the second main body 42. Under the premise of ensuring a certain light-blocking part, the light-transmitting area of ​​the third light-transmitting part 53 can be increased, which is conducive to increasing the light-emitting area of ​​the pixel opening of the third sub-pixel G.

[0102] Here, the outline of the third projection pattern 50 is the inscribed circle of the frame 80. The first overlapping area 211, where the third projection pattern 50 overlaps with the first projection pattern 30, is shaped like a "leaf," formed by splicing a quarter arc of the first projection pattern 30 and a first arc m1 of the third projection pattern 50, where the radian angle of the first arc m1 is α1. The first light-shielding part 321, the first sub-light-shielding part 521, and the second branch part 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 part 321, the first sub-light-shielding part 521, and the second branch part 43. The second overlapping area 212, where the third projection pattern 50 overlaps with the second projection pattern 40, is shaped like a "leaf," formed by splicing a quarter arc of the second projection pattern 40 and a second arc m2 of the third projection pattern 50, where the radian angle of the second arc m2 is α2. α2 > α1, α1 + α2 = 180°. The first arc m1 of the third projection pattern 50 connects to the second arc m2 to form a semi-circular arc of the third projection pattern. Here, the second light-shielding part 421, the second sub-light-shielding part 522, and the first branch part 33 are all located in the second overlapping area 212; the position and pattern shape of the second overlapping area 212 are also the position and shape of the second light-shielding part 421, the second sub-light-shielding part 522, and the first branch part 33. As shown in Figure 3, for any first filter unit 31, it consists of a circular first main body part 32 and four pairs of first branch parts 33a in the shape of "leaf" surrounding the first main body part 32. The positions of the four pairs of first branch parts 33a are respectively located at 0°, 90°, 180°, and 270° from the edge of the first main body part 32 with the center O1 of the first main body part 32 as the origin. Each pair of first branch parts 33a includes two symmetrically arranged first branch parts 33, and their 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 part 32. As shown in Figure 5, any second filter unit 41 consists of a circular second main body 42 and four pairs of second branch sections 43a that are shaped like "leaf" surrounding the second main body 42. The four pairs of second branch sections 43a are located at 0°, 90°, 180° and 270° from the center O2 of the second main body 42, respectively. Each pair of second branch sections 43a includes two symmetrically arranged second branch sections 43, and their axis of symmetry is the extension of the line connecting the intersection of the two branches 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 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 overlapping the third projection pattern 50 and the first projection pattern 30 is 'a'; the maximum distance between the two curved edges of the blade shape overlapping the third projection pattern 50 and the second projection pattern 40 is 'b'; 'a' is less than 'b'. The value of 'a' determines the size of the first light-shielding part 321, the first sub-light-shielding part 521, and the second branch part 43; the value of 'b' determines the size of the second light-shielding part 421, the second sub-light-shielding part 522, and the first branch part 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 diameters (2*R1) of the first projection pattern 30 and the third projection pattern 50 (2*R3) are both smaller than the diameter (2*R2) of the second projection pattern 40. Optionally, the diameters (2*R1) of the first projection pattern 30 and the third projection pattern 50 (2*R3) are the same.

[0106] This disclosure allows for the initial determination of the aperture ratio and aperture proportion of the pixel apertures of the first sub-pixel R, the second sub-pixel B, and the third sub-pixel G. Based on the aperture ratio and aperture proportion of the pixel apertures 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 each first main body portion 31, second main body portion 41, and third filter unit 51 are determined. This disclosure does not limit the actual dimensions of each first main body portion 31, second main body portion 41, and third filter unit 51; the area ratio of the three varies depending on the aperture proportion of the pixel apertures of the first sub-pixel R, the second sub-pixel B, and the third sub-pixel G. This disclosure does not limit the specific size data.

[0107] The pixel arrangement disclosed herein uses a circular "diamond" pixel arrangement as an example. 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 area of ​​the pixel opening 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 area of ​​the first projection pattern 30, the area of ​​the second projection pattern 40, and the area of ​​the third projection pattern 50 is 1:2.5:1.56.

[0108] It should be noted that the pixel arrangement method disclosed herein is based on a circular "diamond" pixel arrangement as an example, but other arrangements can also be applied.

[0109] In some embodiments, this disclosure is not limited to the design shape of the color filter being a certain color; it can be adjusted according to the dark-state reflectance hue of the display panel. Specifically, the stacking position relationship of each color filter can be adjusted according to the actual dark-state reflectance hue of the display panel. A first color filter, a second color filter, and a third color filter are stacked sequentially along the direction away from the substrate 1. Example 1: As shown in FIG1, the first color filter can be a red filter R_CF for transmitting red light, the second color filter can be a blue filter B_CF for transmitting blue light, and the third color filter can be a green filter G_CF for transmitting light. The shapes of the first color filter, the second color filter, and the third color filter are shown in FIG2, FIG4, and FIG6. Example 2: According to the result of the reflectance hue adjustment, the first color filter can be a red filter R_CF for transmitting red light, the second color filter can be a green filter G_CF for transmitting green light, and the third color filter can be a blue filter B_CF for transmitting blue light. Example 3: Based on the reflected hue adjustment result, the first color filter can be a blue filter B_CF for transmitting blue light, the second color filter can be a red filter R_CF for transmitting red light, and the third color filter can be a green filter G_CF for transmitting green light. Example 4: Based on the reflected hue adjustment result, the first color filter can be a blue filter B_CF for transmitting blue light, the second color filter can be a green filter G_CF for transmitting green light, and the third color filter can be a red filter R_CF for transmitting red light. Example 5: Based on the reflected hue adjustment result, the first color filter can be a green filter G_CF for transmitting green light, the second color filter can be a red filter R_CF for transmitting red light, and the third color filter can be a blue filter B_CF for transmitting blue light. Example 6: Based on the reflected hue adjustment result, the first color filter can be a green filter G_CF for transmitting green light, the second color filter can be a blue filter B_CF for transmitting blue light, and the third color filter can be a red filter R_CF for transmitting red light.

[0110] In some embodiments, as shown in FIG1, the display substrate further includes an encapsulation layer 9 disposed on the side of the color filter structure near the 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 can 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) arranged sequentially along the direction away from the 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 filter structure opposite to the encapsulation layer 9. The touch layer includes multiple metal layers and a dielectric layer disposed between adjacent metal layers. Specifically, the touch layer includes touch driving electrodes, touch sensing electrodes, and a touch insulating layer located between the touch driving electrodes and the touch sensing electrodes. Exemplarily, the touch layer includes a first metal layer, a touch insulating layer, and a second metal layer sequentially disposed along the direction opposite to the substrate. The touch driving electrodes and touch sensing electrodes are typically located in the second metal layer, and a bridging portion is located in the first metal layer. The bridging portion connects two parts of the touch driving electrodes in the second metal layer through conductive vias (in practice, the touch sensing electrodes can also be connected through the bridging portion). Here, the material of the touch insulating layer can be an inorganic material, which can be, but is not limited to, silicon nitride (SiN). The materials of the first metal layer and the second metal layer can both be, but are not limited to, titanium / aluminum / titanium (Ti / Al / Ti) composite materials.

[0113] Secondly, embodiments of this disclosure provide a mask assembly for fabricating a display substrate according to any one of the first aspects. The mask assembly includes a first mask 101, a second mask 102, and a third mask 103.

[0114] As shown in Figure 10, the first mask 101 includes a first opening pattern 1011 for forming a first color filter R_CF. The first opening pattern 1011 is identical to the pattern of the first color filter R_CF. Optionally, as shown in Figure 1, the first mask 101 is used to form a pattern including the first color filter R_CF on the side of the encapsulation layer 9 facing away from the substrate 1 through a single patterning process.

[0115] As shown in Figure 11, the second mask 102 includes a second opening pattern 1021 for forming a second color filter B_CF. The second opening pattern 1021 is identical to the pattern of the second color filter B_CF. Optionally, as shown in Figure 1, the second mask 102 is used in a single patterning process to form a pattern including the second color filter B_CF on the side of the first color filter R_CF facing away from the encapsulation layer 9.

[0116] As shown in Figure 12, the third mask 103 includes a third opening pattern 1031 for forming a third color filter G_CF. The third opening pattern 1031 is identical to the pattern of the third color filter G_CF. Optionally, as shown in Figure 1, the third mask 103 is used in a single patterning process to form a pattern including the third color filter G_CF on the side of the second color filter B_CF opposite to the first color filter R_CF.

[0117] Thirdly, embodiments of this disclosure provide a display device comprising the display substrate described in any of the above embodiments. This display device can be, for example, any product with a display function such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or in-vehicle device. Other essential components of this display device are readily understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the scope of this disclosure.

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

Claims

1. A display substrate, comprising a substrate, a sub-pixel layer and a color filter structure disposed sequentially along a direction away from the substrate; the sub-pixel layer comprising a first sub-pixel, a second sub-pixel and a third sub-pixel; the color filter structure comprising a first color filter, a second color filter and a third color filter stacked together; The first color filter, the second color filter, and the third color filter have overlapping and non-overlapping regions when projected onto the substrate; the overlapping region surrounds the non-overlapping region. The first color filter, the second color filter, and the third color filter located in the overlapping area are used for light blocking; 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 includes multiple groups of first filter units arranged side by side along a first direction, and each group of first filter units includes multiple first filter units arranged side by side along a second direction; the first direction and the second direction are intersected. The first filter units in adjacent groups of the first filter unit are staggered; each first filter unit includes a first main body and a first branch; the first main body includes a first light-shielding part located in the overlapping area and a first light-transmitting part 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; the first branch portion is disposed on the 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 includes multiple groups of second filter units arranged side by side along a first direction, and each group of second filter units includes multiple second filter units arranged side by side along a second direction; The second filter units in adjacent groups of the second filter units are staggered; the second filter unit includes a second main body and a second branch; the second main body includes a second light-shielding part located in the overlapping area and a second light-transmitting part located in the non-overlapping area; the second branch is located in the overlapping area; The second light-transmitting part is used for light transmission, the second light-shielding part surrounds the second light-transmitting part, and the second branch part is disposed on the side of the second light-shielding part away from the second light-transmitting part.

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

5. The display substrate according to claim 4, wherein, In the first filter unit group of the adjacent group, two first filter units that are staggered and adjacent to each other are shared by a first branch between two first main bodies, and the shared first branch and the first main body connected thereto are used together to define the third light-transmitting part; in the first direction, two first filter units that are adjacent to each other are shared by a plurality of first branches located between two first main bodies and the first main body connected thereto, which are used together to define the second light-transmitting part of the second filter unit. In the adjacent group of the second filter units, two second filter units that are staggered and adjacent to each other are shared by the second branch between the two second main bodies, and the shared second branch and the second main body connected thereto are used together to define the third light-transmitting part; in the first direction, two second filter units that are adjacent to each other are shared by the multiple second branches between the two second main bodies and the second main bodies connected thereto, and are used together to define the first light-transmitting part of the first filter unit.

6. The display substrate according to claim 4 or 5, wherein, The first light-shielding portion, the first sub-light-shielding portion, and the second branch portion overlap in their orthogonal projections on the substrate. The second light-shielding portion, the second sub-light-shielding portion, and the first branch portion overlap in their orthogonal projections on the substrate.

7. The display substrate according to claim 6, wherein, The orthographic projection of the first main body portion onto the substrate is a first projection pattern, and the orthographic projection of the second main body portion onto the substrate is a second projection pattern; The orthographic projection of the third filter unit onto the substrate is a third projection pattern; The first projection pattern and the second projection pattern are alternately arranged in both the first direction and the second direction, and do not overlap; The third center line connecting each of the third projection patterns corresponding to a group of third filter units is located between the first center lines connecting each of the first projection patterns corresponding to an adjacent group of second filter units; or, the third center line connecting each of the third projection patterns corresponding to a group of third filter units is located between the second center lines connecting each of the second projection patterns corresponding to an adjacent group of second filter units.

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 projection unit includes a pair of first projection patterns and second projection patterns that are adjacent in the first direction, and another pair of first projection patterns and second projection patterns that are adjacent to the pair of first projection patterns and second projection patterns in the second direction. For any of the projection units, the center lines connecting the centers of the first projection patterns and the second projection patterns that are adjacent to each other form a square; the center of the third projection pattern is located within the square.

9. The display substrate according to claim 8, wherein, The center of the third projected pattern coincides with the geometric center of the box.

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 outlines of any two adjacent first projection patterns are externally tangent to the outlines of the second projection pattern; the outlines of any two adjacent third projection patterns are externally tangent to each other.

11. The display substrate according to claim 10, wherein, The outline of the third projection pattern is the inscribed circle of the box.

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 both the third projection pattern and the diameter of the first projection pattern are 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 disposed opposite to each other in the extension direction of the first diagonal of the frame; the third projection pattern overlaps with the second projection pattern to form a second overlapping area, and the second overlapping area is disposed opposite to each other in the extension direction of the second diagonal of the frame. The first overlapping area is a closed shape formed by connecting a segment of the first arc in the third projection pattern and one-quarter of the arc of the first projection pattern end to end; The second overlapping area is a closed shape formed by connecting a segment of the 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 ​​together to form a semi-circular arc of the third projection pattern; The first light-shielding part, the first sub-light-shielding part, and the second branch part are located in the first overlapping area; The second light-shielding part, the second sub-light-shielding part, and the first branch part 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 branches are divided into four pairs of first branch pairs, which are located at the boundary positions of 0°, 90°, 180° and 270° of the first main body, respectively; each pair of first branch pairs includes two first branches arranged symmetrically, and the axis of symmetry is the extension line of the line connecting the intersection of the two branches and the center of the first main body; the endpoint of the first branch is connected to the endpoint of the first light-shielding part. For any second filter unit, the plurality of second branches are divided into four pairs of second branch pairs, which are located at the boundary positions of 0°, 90°, 180° and 270° of the second main body, respectively; each pair of second branch pairs includes two second branches arranged symmetrically, and the axis of symmetry is the extension line of the line connecting the intersection of the two branches and the center of the second main body; the endpoint of the second branch is connected to the endpoint of the second light-shielding part.

15. A display device comprising a display substrate as claimed in any one of claims 1 to 14.

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