Display substrate and display device

Abstract

The invention provides a display substrate and a display device. The display device comprises a substrate; a plurality of light emitting devices; the pixel limiting layer comprises a plurality of pixel openings penetrating in the thickness direction of the pixel limiting layer; the black matrix layer is arranged on the side, away from the substrate, of the pixel limiting layer, the black matrix layer comprises a plurality of black matrix openings penetrating in the thickness direction of the black matrix layer, and the orthographic projection of one black matrix opening on the substrate covers the orthographic projection of one pixel opening on the substrate; at least part of the pixel openings are provided with a plurality of first side edges and first connecting edges for connecting two adjacent first side edges; the maximum distance from the orthographic projection of the first side edge on the substrate to the orthographic projection of the corresponding black matrix opening on the substrate is larger than the maximum distance from the orthographic projection of the first connecting edge on the substrate to the orthographic projection of the corresponding black matrix opening 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] For the current COE OLED (Color Filter on Encap Organic Light-Emitting Diode, i.e., organic electroluminescent display using color filter) screen, the black matrix film structure is similar to a grating, and the reflected light from the external environment is diffracted at the boundary of the black matrix opening, producing glare. Since different colors of light have different wavelengths and different diffraction degrees, color separation occurs, but the light diffraction intensity in different directions is different, and the color separation is poor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art and provides a display substrate and a display device.

[0004] The present disclosure provides a display substrate, comprising:

[0005] substrate substrate;

[0006] A plurality of light emitting devices are arranged on the base substrate;

[0007] A pixel defining layer, comprising a plurality of pixel openings penetrating along the thickness direction thereof, wherein the first electrode of the light emitting device is located on a side of the pixel opening close to the base substrate, and the light emitting layer and the second electrode of the light emitting device both at least cover the pixel opening;

[0008] A black matrix layer is arranged on a side of the pixel defining layer away from the base substrate, the black matrix layer includes a plurality of black matrix openings penetrating along the thickness direction thereof, and the orthographic projection of one black matrix opening on the base substrate covers the orthographic projection of one pixel opening on the base substrate; wherein,

[0009] At least part of the pixel openings has a plurality of first side edges, and a first connecting edge connecting two adjacent first side edges arranged in sequence;

[0010] Among them, the maximum distance between the orthographic projection of the first side on the base substrate and the corresponding orthographic projection of the black matrix opening on the base substrate is a first distance, and the maximum distance between the orthographic projection of the first connecting edge on the base substrate and the corresponding orthographic projection of the black matrix opening on the base substrate is a second distance, and the first distance is greater than the second distance.

[0011] Wherein, the multiple light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the pixel opening corresponding to the red light-emitting device is a red pixel opening, the pixel opening corresponding to the green light-emitting device is a green pixel opening, and the pixel opening corresponding to the blue light-emitting device is a blue pixel opening; the black matrix opening corresponding to the red pixel opening is a first black matrix opening, the black matrix opening corresponding to the green pixel opening is a second black matrix opening, and the black matrix opening corresponding to the blue pixel opening is a third black matrix opening;

[0012] At least one of the red pixel opening and the blue pixel opening has four first side edges and four first connecting sides, two of the four first side edges are arranged opposite to each other and extend along the first direction, and the other two are arranged opposite to each other and extend along the second direction.

[0013] Wherein, when the number of first sides of the red pixel opening is four and the number of first connecting sides is four, the first black matrix opening includes four second sides arranged in sequence and a second connecting side connected between adjacent second sides; the angle between a tangent line at any point on the second connecting side and an extension line connected to the second side is an obtuse angle;

[0014] The first side edge of the red pixel opening is opposite to the second connecting edge of the first black matrix opening; the first connecting edge of the red pixel opening is opposite to the second side edge of the first black matrix opening.

[0015] Wherein, when the number of first sides of the blue pixel opening is four and the number of first connecting sides is four, the third black matrix opening includes four second sides arranged in sequence and a second connecting side connected between adjacent second sides; the angle between a tangent line at any point on the second connecting side and an extension line connected to the second side is an obtuse angle;

[0016] The first side edge of the blue pixel opening is opposite to the second connection edge of the third black matrix opening; the first connection edge of the blue pixel opening is opposite to the second side edge of the third black matrix opening.

[0017] The second connecting edge is a straight line edge or an arc edge.

[0018] Wherein, when the number of first sides of the red pixel opening is four, the first black matrix opening is circular or elliptical.

[0019] Wherein, when the first side edges of the blue pixel opening are four, the third black matrix opening is circular or elliptical.

[0020] Among them, the green pixel opening has two first side edges and two first connecting edges, the two first side edges are arranged opposite to each other and both extend along the first direction or the second direction; the first connecting edge is an arc edge; and the second black matrix opening is circular.

[0021] The green pixel opening has two first side edges and two first connecting edges, the two first side edges are arranged opposite to each other and both extend in the first direction or the second direction; the first connecting edge is an arc edge; the second black matrix opening includes two second side edges arranged opposite to each other and a second connecting edge connected between two adjacent second side edges; the angle between a tangent line at any point on the second connecting edge and an extension line of the second side edge connected thereto is an obtuse angle;

[0022] The first side of the green pixel opening is opposite to the second connecting side of the second black matrix opening; the first connecting side of the green pixel opening is opposite to the second side of the second black matrix opening.

[0023] There are two first side edges of the green pixel opening, the two first side edges are arranged opposite to each other and both extend along the first direction or the second direction; there are two first connecting edges; the first connecting edge includes two first sub-connecting segments and a second sub-connecting segment connecting the two first sub-connecting segments, the angle between the first sub-connecting segment and the second sub-connecting segment is an obtuse angle, and the two first sub-connecting segments respectively connect two adjacent first side edges;

[0024] The second black matrix opening has two second connecting edges and two second side edges; the second side edges include two first line segments and a second line segment connecting the two first line segments, the angle between the first line segment and the second line segment is an obtuse angle, and the two first line segments respectively connect two adjacent second connecting edges;

[0025] The first side of the green pixel opening is opposite to the second connecting side of the second black matrix opening; the first connecting side of the green pixel opening is opposite to the second side of the second black matrix opening.

[0026] Wherein, the multiple light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the pixel opening corresponding to the red light-emitting device is a red pixel opening, the pixel opening corresponding to the green light-emitting device is a green pixel opening, and the pixel opening corresponding to the blue light-emitting device is a blue pixel opening; the black matrix opening corresponding to the red pixel opening is a first black matrix opening, the black matrix opening corresponding to the green pixel opening is a second black matrix opening, and the black matrix opening corresponding to the blue pixel opening is a third black matrix opening;

[0027] The red pixel opening and the first black matrix opening have the same shape, which is circular or elliptical; and / or,

[0028] The blue pixel opening and the third black matrix opening have the same shape, which is circular or elliptical.

[0029] Among them, the green pixel opening has two first side edges and two first connecting edges, the two first side edges are arranged opposite to each other and both extend along the first direction or the second direction; the first connecting edge is an arc edge; and the second black matrix opening is circular.

[0030] The first connecting edge is a straight line edge or an arc edge.

[0031] The present disclosure provides a display device, comprising any one of the above-mentioned display substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the film structure of a COE OLED display substrate in the related art;

[0033] Figure 2 A schematic top view of a pixel opening and a black matrix opening design in the related art;

[0034] Figure 3 For Figure 2 Schematic diagram of the results of color separation simulation of the design shown;

[0035] Figure 4 A schematic top view of another pixel opening and black matrix opening design in the related art;

[0036] Figure 5 For Figure 4 Schematic diagram of the results of color separation simulation of the design shown;

[0037] Figure 6 is a schematic cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0038] Figure 7 A schematic top view of the pixel opening and black matrix opening design of the first example of the present disclosure;

[0039] Figure 8 A schematic top view of a pixel opening and a black matrix opening design of a second example of the present disclosure;

[0040] Fig. 9 A schematic top view of a design of a pixel opening and a black matrix opening according to a third example of the present disclosure;

[0041] Fig.10 A schematic top view of a pixel opening and a black matrix opening design of a fourth example of the present disclosure;

[0042] Fig.11 A schematic top view of a design of a pixel opening and a black matrix opening according to a fifth example of the present disclosure;

[0043] Fig.12 A schematic top view of the pixel opening and black matrix opening design of the sixth example of the present disclosure. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] 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 divide 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 may 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.

[0046] like Figure 1 As shown, in the related art, the display substrate using COE technology may include a light-emitting device layer 10, a touch layer 20, a black matrix layer 30, a color filter layer and a cover glass 70. Among them, the light-emitting device layer 10 may include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the touch layer 20 is located above the light-emitting device layer 10; the black matrix layer 30 is located on the side of the touch layer 20 away from the light-emitting device layer 10, and a plurality of black matrix openings are opened on the black matrix layer 30, and a black matrix opening at least partially overlaps with the orthographic projection of a light-emitting device on the light-emitting device layer 10; the color filter layer includes a plurality of color filters arranged at intervals, and a color filter covers a black matrix opening on the side of the black matrix layer 30 away from the light-emitting device layer 10, the red filter 41 is arranged corresponding to the red light-emitting device, the green filter 42 is arranged corresponding to the green light-emitting device, and the blue filter 43 is arranged corresponding to the blue light-emitting device; the cover glass 70 is located on the side of the color filter layer away from the light-emitting device layer 10. In addition, a curing film layer 50 and an optical adhesive layer 60 may be disposed between the color filter layer and the cover glass 70 .

[0047] When the reflected light of the external environment light is emitted from the black matrix opening, the reflected light is diffracted due to the grating effect of the black matrix opening. Since the wavelengths of light of different colors are different, color separation occurs.

[0048] like Figure 2 As shown, in the related art, the red pixel opening 11 and the blue pixel opening 13 are rounded squares, and the corresponding black matrix openings 31 and 33 are rounded squares, respectively; the green pixel opening 12 is elliptical, and the corresponding black matrix opening 32 is elliptical. Figure 3 As shown, from the color separation simulation results of this pixel arrangement structure, it can be seen that the diffraction intensity of the reflected light in the first direction D1 and the second direction D2 is large, the diffraction intensity in other directions is small, and the color separation symmetry is poor, wherein the first direction D1 and the second direction D2 are the extension directions of the long straight sides of the rounded square and the extension directions of the straight sides of the ellipse-like shape.

[0049] like Figure 4 As shown, in order to improve the color separation effect, the red pixel opening 11, the green pixel opening 12, and the blue pixel opening 13 are all circular or elliptical, and the corresponding black matrix openings 31\32\33 are also circular or elliptical. In some cases, the circular or elliptical shape can be Figure 2 The inscribed circle corresponding to the pixel opening shape. Figure 5 As shown in the figure, the color separation simulation results show that the diffraction intensity of the reflected light is uniform in all directions, and the color separation symmetry is good. However, this design greatly loses the aperture ratio, which is not conducive to the yield of the evaporation process and the effect of reducing power consumption through COE technology.

[0050] In order to solve the above problems, the present disclosure provides a display substrate, which achieves the effects of improving the aperture ratio and reducing power consumption by designing pixel openings and black matrix openings.

[0051] like Figure 6 As shown, the present disclosure provides a display substrate, which includes a base substrate 80 , a plurality of light-emitting devices, a pixel defining layer 14 and a black matrix layer 30 .

[0052] A plurality of light-emitting devices are arranged on a base substrate 80; a pixel defining layer 14 includes a plurality of pixel openings extending through the pixel defining layer 14 along its thickness direction, a first electrode of the light-emitting device is located on a side of the pixel opening close to the base substrate 80, and a light-emitting layer and a second electrode of the light-emitting device both at least cover the pixel opening; a black matrix layer 30 is arranged on a side of the pixel defining layer 14 away from the base substrate 80, the black matrix layer 30 includes a plurality of black matrix openings 31\32\33 extending through the pixel defining layer 14 along its thickness direction, and an orthographic projection of a black matrix opening on the base substrate 80 covers an orthographic projection of a pixel opening on the base substrate 80.

[0053] Among them, at least part of the pixel openings have multiple first side edges, and a first connecting edge connecting two adjacent first side edges arranged in sequence; the maximum distance between the orthographic projection of the first side edge on the substrate substrate 80 and the corresponding orthographic projection of the black matrix opening on the substrate substrate 80 is a first distance d1, and the maximum distance between the orthographic projection of the first connecting edge on the substrate substrate 80 and the corresponding orthographic projection of the black matrix opening on the substrate substrate 80 is a second distance d2, and the first distance d1 is greater than the second distance d2.

[0054] In the embodiment of the present disclosure, in at least part of the pixel openings, the first spacing d1 between the orthographic projection of the first side on the substrate substrate 80 and the orthographic projection of the corresponding black matrix opening on the substrate substrate 80 is greater than the second spacing d2 between the orthographic projection of the first connecting edge on the substrate substrate 80 and the orthographic projection of the corresponding black matrix opening on the substrate substrate 80, so that the diffraction effect of the black matrix opening corresponding to the first side on the reflected light is weaker than the diffraction effect of the black matrix opening corresponding to the first connecting edge on the reflected light, so that the diffraction effect of the black matrix opening on light in different directions is different, which is conducive to achieving a uniform effect of the diffracted light intensity in each direction, and has better color separation symmetry. In other pixel openings, the first spacing d1 may also be equal to the second spacing d2. In some cases, the first spacing d1 may also be smaller than the second spacing d2, which is not specifically limited here.

[0055] In the embodiment of the present disclosure, at least some of the pixel openings and their corresponding black matrix openings may have different shapes, as long as the above-mentioned first spacing d1 is greater than the second spacing d2, so that the diffraction effect of the black matrix opening on light in different directions is different, which is within the protection scope of the present disclosure. Other pixel openings and their corresponding black matrix openings may have the same shape or different shapes. The design of the pixel openings and black matrix openings of the present disclosure is described below in conjunction with specific examples, but none of them shall constitute a limitation to the present disclosure.

[0056] In one embodiment, the angle between the tangent line at any point on the first connecting edge and the extension line of the first side connected thereto is an obtuse angle. In other embodiments, the angle between the tangent line at any point on the first connecting edge and the extension line of the first side connected thereto may be a right angle. In some cases, the angle between the tangent line at any point on the first connecting edge and the extension line of the first side connected thereto may also be an acute angle, which is not specifically limited here. The present disclosure takes the angle between the tangent line at any point on the first connecting edge and the extension line of the first side connected thereto as an obtuse angle as an example to illustrate the inventive concept of the present disclosure, but this does not constitute a limitation on the present disclosure.

[0057] In one embodiment, the first connecting edge is a straight line edge or an arc edge. Of course, the first connecting edge may also be other possible shapes, which are not specifically limited here. In the following description, the embodiment of the present disclosure is described with the first connecting edge being an arc edge, but this does not constitute a limitation of the present disclosure.

[0058] In some embodiments, the display substrate may further include an encapsulation layer 90 , which is disposed between the pixel defining layer 14 and the black matrix layer 30 and is used to encapsulate the pixel defining layer 14 , the light emitting device and the pixel circuit thereunder.

[0059] In one embodiment, the plurality of light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the pixel opening corresponding to the red light-emitting device is a red pixel opening 11, the pixel opening corresponding to the green light-emitting device is a green pixel opening 12, and the pixel opening corresponding to the blue light-emitting device is a blue pixel opening 13; the black matrix openings corresponding to the red pixel openings 11 are first black matrix openings 31, the black matrix openings corresponding to the green pixel openings 12 are second black matrix openings 32, and the black matrix openings corresponding to the blue pixel openings 13 are third black matrix openings 33.

[0060] In other embodiments that have been implemented or are about to be implemented, the multiple light-emitting devices may also include light-emitting devices of other colors, which is not specifically limited herein. The present disclosure uses the example of multiple light-emitting devices including red light-emitting devices, green light-emitting devices and blue light-emitting devices to illustrate the inventive concept of the present disclosure, but this shall not constitute a limitation on the present disclosure.

[0061] In one embodiment, at least one of the red pixel opening 11 and the blue pixel opening 13 has four first side edges and four first connecting sides, two of the four first side edges are oppositely arranged and both extend along the first direction D1, and the other two are oppositely arranged and both extend along the second direction D2.

[0062] The number of the first side edges may also be six, eight, etc.

[0063] Among them, the first direction D1 is different from the second direction D2. For example, the first direction D1 is perpendicular to the second direction D2, and the angle between the first direction D1 and the second direction D2 is 30°, etc., which is not specifically limited here. In the subsequent examples, the first direction D1 and the second direction D2 are perpendicular to each other, but this does not constitute a limitation to the present disclosure.

[0064] The first example: Figure 7As shown, there are four first side edges 111 of the red pixel opening 11, and four first connecting edges 112. The first black matrix opening 31 includes four second side edges 311 arranged in sequence, and second connecting edges 312 connected between adjacent second side edges 311; the angle between the tangent line at any point on the second connecting edge 312 and the extension line connected to the second side edge 311 is an obtuse angle; the first side edge 111 of the red pixel opening 11 is opposite to the second connecting edge 312 of the first black matrix opening 31; the first connecting edge 112 of the red pixel opening 11 is opposite to the second side edge 311 of the first black matrix opening 31.

[0065] The second connecting edge 312 of the first black matrix opening 31 is an arc edge. In other embodiments, the second connecting edge 312 of the first black matrix opening 31 may be a straight edge, which is not specifically limited here.

[0066] There are four first side edges 131 of the blue pixel opening 13, and four first connecting edges 132. The third black matrix opening 33 includes four second side edges 331 arranged in sequence, and a second connecting edge 332 connected between adjacent second side edges 331; the angle between the tangent line at any point on the second connecting edge 332 and the extension line connected to the second side edge 331 is an obtuse angle; the first side edge 131 of the blue pixel opening 13 is opposite to the second connecting edge 332 of the third black matrix opening 33; the first connecting edge 132 of the blue pixel opening 13 is opposite to the second side edge 331 of the third black matrix opening 33.

[0067] The second connecting edge 332 of the third black matrix opening 33 is an arc edge. In other embodiments, the second connecting edge 332 of the third black matrix opening 33 may be a straight edge, which is not specifically limited here.

[0068] The green pixel opening 12 has two first side edges 121 and two first connecting edges 122 . The two first side edges 121 are arranged opposite to each other and extend along the first direction D1 or the second direction D2 . The first connecting edges 122 are arc edges. The second black matrix opening 32 is circular.

[0069] like Figure 7As shown, taking the blue pixel opening 12 and the third black matrix opening 33 as an example, the maximum distance between the orthographic projection of the first side 131 of the blue pixel opening 13 on the substrate 80 and the orthographic projection of the second connecting edge 332 of the third black matrix opening 33 on the substrate 80 is the first distance d1, and the maximum distance between the orthographic projection of the first connecting edge 121 of the blue pixel opening 12 on the substrate 80 and the orthographic projection of the second side 331 of the third black matrix opening 33 on the substrate 80 is the second distance d2, d1 is greater than d2, so that the diffraction intensity of the reflected light at the second connecting edge 332 of the third black matrix opening 33 is less than the diffraction intensity at the second side 331, so that the intensity of the diffracted light in the first direction D1 and the second direction D2 becomes weaker, which is conducive to the uniformity of the intensity distribution of the diffracted light in each direction, and is conducive to achieving a more optimized color separation effect. Moreover, from the position of d1 to the position of d2, the spacing gradually decreases, which is conducive to avoiding the sudden change of the diffraction intensity of the light in different directions. Similarly, the red pixel opening 11 and the first black matrix opening 31 , as well as the green pixel opening 12 and the second black matrix opening 31 , also have the same effect, which will not be described in detail here.

[0070] The second example, such as Figure 8 As shown, the red pixel opening 11 has four first sides 111 and four first connecting sides 112, and the first black matrix opening 31 includes four second sides 311 arranged in sequence, and second connecting sides 312 connected between adjacent second sides 311; the angle between the tangent line at any point on the second connecting side 312 and the extension line connected to the second side 311 is an obtuse angle; the first black matrix opening 31 is circular. The first black matrix opening 31 may also be an ellipse or other suitable shape, which is not specifically limited here.

[0071] The blue pixel opening 13 has four first sides 131 and four first connecting sides 132. The third black matrix opening 33 includes four second sides 331 arranged in sequence and second connecting sides 332 connected between adjacent second sides 331. The angle between the tangent line at any point on the second connecting side 332 and the extension line connected to the second side 331 is an obtuse angle. The third black matrix opening 33 is circular. The third black matrix opening 33 may also be an ellipse or other suitable shape, which is not specifically limited here.

[0072] The green pixel opening 12 has two first side edges 121 and two first connecting edges 122 . The two first side edges 121 are arranged opposite to each other and extend along the first direction D1 or the second direction D2 . The first connecting edges 122 are arc edges. The second black matrix opening 32 is circular.

[0073] like Figure 8As shown, taking the blue pixel opening 13 and the third black matrix opening 33 as an example, the maximum spacing between the orthographic projection of the first side 131 of the blue pixel opening 13 on the substrate 80 and the orthographic projection of the third black matrix opening 33 on the substrate 80 is the first spacing d1, and the maximum spacing between the orthographic projection of the first connecting edge 132 of the blue pixel opening 13 on the substrate 80 and the orthographic projection of the third black matrix opening 33 on the substrate 80 is the second spacing d2, d1 is greater than d2, so that the diffraction intensity of the reflected light at the first spacing d1 is less than the diffraction intensity at the second spacing d2, so that the intensity of the diffracted light in the first direction D1 and the second direction D2 becomes weaker, which is conducive to the uniformity of the intensity distribution of the diffracted light in each direction, and is conducive to achieving a more optimized color separation effect. Moreover, from the position of d1 to the position of d2, the spacing gradually decreases, which is conducive to avoiding the sudden change of the diffraction intensity of the light in different directions. Similarly, the red pixel opening 11 and the first black matrix opening 31, as well as the green pixel opening 12 and the second black matrix opening 32, also have the same effect, which will not be repeated here.

[0074] The third example is Fig. 9 As shown, there are four first side edges 111 of the red pixel opening 11, and four first connecting edges 112. The first black matrix opening 31 includes four second side edges 311 arranged in sequence, and second connecting edges 312 connected between adjacent second side edges 311; the angle between the tangent line at any point on the second connecting edge 312 and the extension line connected to the second side edge 311 is an obtuse angle; the first side edge 111 of the red pixel opening 11 is opposite to the second connecting edge 312 of the first black matrix opening 31; the first connecting edge 112 of the red pixel opening 11 is opposite to the second side edge 311 of the first black matrix opening 31.

[0075] The second connecting edge 312 of the first black matrix opening 31 is an arc edge. In other embodiments, the second connecting edge 312 of the first black matrix opening 31 may be a straight edge, which is not specifically limited here.

[0076] There are four first side edges 131 of the blue pixel opening 13, and four first connecting edges 132. The third black matrix opening 33 includes four second side edges 331 arranged in sequence, and a second connecting edge 332 connected between adjacent second side edges 331; the angle between the tangent line at any point on the second connecting edge 332 and the extension line connected to the second side edge 331 is an obtuse angle; the first side edge 131 of the blue pixel opening 13 is opposite to the second connecting edge 332 of the third black matrix opening 33; the first connecting edge 132 of the blue pixel opening 13 is opposite to the second side edge 331 of the third black matrix opening 33.

[0077] The second connecting edge 332 of the third black matrix opening 33 is an arc edge. In other embodiments, the second connecting edge 332 of the third black matrix opening 33 may be a straight edge, which is not specifically limited here.

[0078] The green pixel opening 12 has two first side edges 121 and two first connecting edges 122. The two first side edges 121 are arranged opposite to each other and both extend along the first direction D1 or the second direction D2. The first connecting edge 122 is an arc edge. The second black matrix opening 32 includes two second side edges 321 arranged opposite to each other and a second connecting edge 322 connected between two adjacent second side edges 321. The angle between the tangent line at any point on the second connecting edge 322 and the extension line connected to the second side edge 321 is an obtuse angle. The first side edge 121 of the green pixel opening 12 is opposite to the second connecting edge 322 of the second black matrix opening 32. The first connecting edge 122 of the green pixel opening 12 is opposite to the second side edge 321 of the second black matrix opening 32.

[0079] like Fig. 9 As shown, taking the green pixel opening 12 and the second black matrix opening 32 as an example, the maximum spacing between the orthographic projection of the first side 121 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second connecting edge 322 of the second black matrix opening 32 on the substrate 80 is the first spacing d1, and the maximum spacing between the orthographic projection of the first connecting edge 122 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second side 321 of the second black matrix opening 32 on the substrate 80 is the second spacing d2, d1 is greater than d2, so that the diffraction intensity of the reflected light at the second connecting edge 322 of the second black matrix opening 32 is less than the diffraction intensity at the second side 321, which is conducive to the uniformity of the intensity distribution of the diffracted light in all directions, and is conducive to achieving a more optimized color separation effect. Moreover, from the position of d1 to the position of d2, the spacing gradually decreases, which is conducive to avoiding the sudden change of the diffraction intensity of the light in different directions. Similarly, the red pixel opening 11 and the first black matrix opening 31, as well as the blue pixel opening 13 and the third black matrix opening 33, also have the same effect, which will not be repeated here.

[0080] The fourth example, such as Fig.10As shown, there are four first side edges 111 of the red pixel opening 11, four first connecting edges 112, and the first black matrix opening 31 includes four second side edges 311 arranged in sequence, and second connecting edges 312 connected between adjacent second side edges 311; the angle between the tangent line at any point on the second connecting edge 312 and the extension line connected to the second side edge 311 is an obtuse angle; the first side edge 111 of the red pixel opening 11 is opposite to the second connecting edge 312 of the first black matrix opening 31; the first connecting edge 112 of the red pixel opening 11 is opposite to the second side edge 311 of the first black matrix opening 31. Among them, the second connecting edge 312 of the first black matrix opening 31 is an arc edge, and in other embodiments, the second connecting edge 312 of the first black matrix opening 31 can be a straight edge.

[0081] The blue pixel opening 13 has four first side edges 131 and four first connecting edges 132. The third black matrix opening 33 includes four second side edges 331 arranged in sequence and second connecting edges 332 connected between adjacent second side edges 331. The angle between the tangent line at any point on the second connecting edge 332 and the extension line connected to the second side edge 331 is an obtuse angle. The first side edge 131 of the blue pixel opening 13 is opposite to the second connecting edge 312 of the third black matrix opening 31. The first connecting edge 132 of the blue pixel opening 13 is opposite to the second side edge 311 of the third black matrix opening 31. The second connecting edge 312 of the third black matrix opening 31 is an arc edge. In other embodiments, the second connecting edge 312 of the third black matrix opening 31 may be a straight edge.

[0082] There are two first side edges 121 of the green pixel opening 12, the two first side edges 121 are arranged opposite to each other and both extend along the first direction D1 or the second direction D2; there are two first connecting edges 122; the first connecting edge 122 includes two first sub-connecting segments 1221 and a second sub-connecting segment 1222 connecting the two first sub-connecting segments 1221, the angle between the first sub-connecting segment 1221 and the second sub-connecting segment 1222 is an obtuse angle, and the two first sub-connecting segments 1221 respectively connect two adjacent first side edges 121; the second connecting edge 32 of the second black matrix opening 32 22, there are two second side edges 321; the second side edges 321 include two first line segments 3211 and a second line segment 3212 connecting the two first line segments 3211, the angle between the first line segment 3211 and the second line segment 3212 is an obtuse angle, and the two first line segments 3211 respectively connect two adjacent second connecting edges 322; the first side edge 121 of the green pixel opening 12 is opposite to the second connecting edge 322 of the second black matrix opening 32; the first connecting edge 122 of the green pixel opening 12 is opposite to the second side edge 321 of the second black matrix opening 32.

[0083] like Fig.10As shown, taking the green pixel opening 12 and the second black matrix opening 32 as an example, the maximum distance between the orthographic projection of the first side 121 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second connecting edge 322 of the second black matrix opening 32 on the substrate 80 is the first distance d1, and the maximum distance between the orthographic projection of the second sub-connecting segment 1222 of the first connecting edge 122 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second line segment 3212 of the second side 321 of the second black matrix opening 32 on the substrate 80 is the second distance d2, d1 is greater than d2, so that the diffraction intensity of the reflected light at the second connecting edge 322 of the second black matrix opening 32 is less than the diffraction intensity at the second side 321, which is conducive to the uniformity of the intensity distribution of the diffracted light in all directions and to the realization of a more optimized color separation effect. Moreover, from the position of d1 to the position of d2, the spacing gradually decreases, which is conducive to avoiding the sudden change of the diffraction intensity of the light in different directions. Similarly, the red pixel opening 11 and the first black matrix opening 31 , as well as the blue pixel opening 13 and the third black matrix opening 33 , also have the same effect, which will not be elaborated here.

[0084] In another embodiment, the red pixel opening 11 and the first black matrix opening 31 have the same shape, both are circular or elliptical; and / or, the blue pixel opening 13 and the third black matrix opening 33 have the same shape, both are circular or elliptical.

[0085] The fifth example is Fig.11 As shown, the red pixel opening 11 and the first black matrix opening 31 have the same shape, which is circular or elliptical.

[0086] The blue pixel opening 13 has four first side edges 131 and four first connecting edges 132. The third black matrix opening 33 includes four second side edges 331 arranged in sequence and second connecting edges 332 connected between adjacent second side edges 331. The angle between the tangent line at any point on the second connecting edge 332 and the extension line connected to the second side edge 331 is an obtuse angle. The first side edge 131 of the blue pixel opening 13 is opposite to the second connecting edge 332 of the third black matrix opening 33. The first connecting edge 132 of the blue pixel opening 13 is opposite to the second side edge 331 of the third black matrix opening 33. The second connecting edge 332 of the third black matrix opening 33 is an arc edge. In other embodiments, the second connecting edge 332 of the third black matrix opening 33 may be a straight edge.

[0087] The green pixel opening 12 has two first side edges 121 and two first connecting edges 122 . The two first side edges 121 are arranged opposite to each other and extend along the first direction D1 or the second direction D2 . The first connecting edges 122 are arc edges. The second black matrix opening 32 is circular.

[0088] like Fig.11 As shown, taking the green pixel opening 12 and the second black matrix opening 32 as examples, the maximum spacing between the orthographic projection of the first side 121 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second black matrix opening 32 on the substrate 80 is the first spacing d1, and the maximum spacing between the orthographic projection of the first connecting edge 122 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second black matrix opening 32 on the substrate 80 is the second spacing d2, d1 is greater than d2, so that the diffraction intensity of the reflected light at the first spacing d1 is less than the diffraction intensity at the second spacing d2, which is beneficial to the uniformity of the intensity distribution of the diffracted light in all directions, and is beneficial to achieving a more optimized color separation effect. Moreover, from the position of d1 to the position of d2, the spacing gradually decreases, which is beneficial to avoid sudden changes in the diffraction intensity of light in different directions. Similarly, the blue pixel opening 13 and the third black matrix opening 33 also have the same effect, which will not be repeated here.

[0089] The sixth example is Fig.12 As shown, the red pixel opening 11 and the first black matrix opening 31 have the same shape, which is circular or elliptical.

[0090] The blue pixel opening 13 and the third black matrix opening 33 have the same shape, which is circular or elliptical.

[0091] The green pixel opening 12 has two first side edges 121 and two first connecting edges 122 . The two first side edges 121 are arranged opposite to each other and extend along the first direction D1 or the second direction D2 . The first connecting edges 122 are arc edges. The second black matrix opening 32 is circular.

[0092] like Fig.12 As shown, taking the green pixel opening 12 and the second black matrix opening 32 as an example, the maximum distance between the orthographic projection of the first side edge 121 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second black matrix opening 32 on the substrate 80 is the first distance d1, and the maximum distance between the orthographic projection of the first connecting edge 12 of the green pixel opening 12 on the substrate 80 and the orthographic projection of the second black matrix opening 32 on the substrate 80 is the second distance d2, d1 is greater than d2, so that the diffraction intensity of the reflected light at the first distance d1 is less than the diffraction intensity at the second distance d2, which is conducive to the uniformity of the intensity distribution of the diffracted light in all directions and to achieving a more optimized color separation effect. Moreover, from the position of d1 to the position of d2, the spacing gradually decreases, which is conducive to avoiding a sudden change in the diffraction intensity of light in different directions.

[0093] In various embodiments of the present disclosure:

[0094] The substrate 80 may be formed of a rigid material or a flexible material. For example, the rigid material includes one of rigid glass, silicon substrate, germanium substrate, and silicon-on-insulator substrate; the flexible material includes one of polyethylene naphthalate, polyethylene terephthalate, polyimide, and flexible glass. The material of the buffer layer may include silicon oxide, silicon nitride, and the like.

[0095] The light-emitting device may be an OLED light-emitting device, or may be other light-emitting devices applicable to the inventive concept of the present disclosure, which is not specifically limited herein. The embodiments of the present disclosure are described by taking the light-emitting device as an OLED light-emitting device as an example, but this does not constitute a limitation of the present disclosure. The OLED light-emitting device may also include one or more layers of a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, and an electron injection layer, which are not specifically limited herein.

[0096] The pixel defining layer 14 may be a single layer structure or a composite layer structure. The material of the pixel defining layer 14 may include an organic material, such as imide, PMMA photoresist, polyimide photoresist, organic silicon photoresist, etc. The material of the pixel defining layer may also include an inorganic material, such as a silicon dioxide aqueous solution system or a silicon dioxide alcohol solution system, etc., which is not specifically limited here.

[0097] The black matrix layer 30 may be a single layer structure or a composite layer structure. The material of the black matrix layer 30 may be a light-proof material with good light absorption effect, such as a black plastic material, etc., which is not specifically limited here.

[0098] The present disclosure provides a display device, comprising any one of the above-mentioned display substrates.

[0099] The display device may be any product with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a vehicle-mounted device, etc. The display device may be a touch display device.

[0100] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention 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 essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display substrate, comprising: substrate substrate; A plurality of light emitting devices are arranged on the base substrate; A pixel defining layer, comprising a plurality of pixel openings penetrating along the thickness direction thereof, wherein the first electrode of the light emitting device is located on a side of the pixel opening close to the base substrate, and the light emitting layer and the second electrode of the light emitting device both at least cover the pixel opening; A black matrix layer is arranged on a side of the pixel defining layer away from the base substrate, the black matrix layer includes a plurality of black matrix openings penetrating along the thickness direction thereof, and the orthographic projection of one black matrix opening on the base substrate covers the orthographic projection of one pixel opening on the base substrate; wherein, At least part of the pixel openings has a plurality of first side edges, and a first connecting edge connecting two adjacent first side edges arranged in sequence; Among them, the maximum distance between the orthographic projection of the first side on the base substrate and the corresponding orthographic projection of the black matrix opening on the base substrate is a first distance, and the maximum distance between the orthographic projection of the first connecting edge on the base substrate and the corresponding orthographic projection of the black matrix opening on the base substrate is a second distance, and the first distance is greater than the second distance.

2. The display substrate according to claim 1, wherein: The plurality of light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the pixel opening corresponding to the red light-emitting device is a red pixel opening, the pixel opening corresponding to the green light-emitting device is a green pixel opening, and the pixel opening corresponding to the blue light-emitting device is a blue pixel opening; The black matrix openings corresponding to the red pixel openings are first black matrix openings, the black matrix openings corresponding to the green pixel openings are second black matrix openings, and the black matrix openings corresponding to the blue pixel openings are third black matrix openings; At least one of the red pixel opening and the blue pixel opening has four first side edges and four first connecting sides, two of the four first side edges are arranged opposite to each other and extend along the first direction, and the other two are arranged opposite to each other and extend along the second direction.

3. The display substrate according to claim 2, wherein: When the number of first sides of the red pixel opening is four and the number of first connecting sides is four, the first black matrix opening includes four second sides arranged in sequence and a second connecting side connected between adjacent second sides; the angle between a tangent line at any point on the second connecting side and an extension line connected to the second side is an obtuse angle; The first side edge of the red pixel opening is opposite to the second connecting edge of the first black matrix opening; the first connecting edge of the red pixel opening is opposite to the second side edge of the first black matrix opening.

4. The display substrate according to claim 2, wherein: When the number of first sides of the blue pixel opening is four and the number of first connecting sides is four, the third black matrix opening includes four second sides arranged in sequence and a second connecting side connected between adjacent second sides; the angle between a tangent line at any point on the second connecting side and an extension line connected to the second side is an obtuse angle; The first side edge of the blue pixel opening is opposite to the second connection edge of the third black matrix opening; the first connection edge of the blue pixel opening is opposite to the second side edge of the third black matrix opening.

5. The display substrate according to claim 3 or 4, wherein: The second connecting edge is a straight line edge or an arc edge.

6. The display substrate according to claim 2, wherein: When the number of first sides of the red pixel opening is four, the first black matrix opening is circular or elliptical.

7. The display substrate according to claim 2, wherein: When the number of first sides of the blue pixel opening is four, the third black matrix opening is circular or elliptical.

8. The display substrate according to claim 2, wherein: The green pixel opening has two first side edges and two first connecting edges, the two first side edges are arranged opposite to each other and both extend along the first direction or the second direction; the first connecting edge is an arc edge; and the second black matrix opening is circular.

9. The display substrate according to claim 2, wherein: The green pixel opening has two first side edges and two first connecting edges, the two first side edges are arranged opposite to each other and both extend in the first direction or the second direction; the first connecting edge is an arc edge; the second black matrix opening includes two second side edges arranged opposite to each other and a second connecting edge connected between two adjacent second side edges; the angle between a tangent line at any point on the second connecting edge and an extension line connected to the second side edge is an obtuse angle; The first side of the green pixel opening is opposite to the second connecting side of the second black matrix opening; the first connecting side of the green pixel opening is opposite to the second side of the second black matrix opening.

10. The display substrate according to claim 2, wherein: The green pixel opening has two first side edges, the two first side edges are arranged opposite to each other and both extend along the first direction or the second direction; the first connecting edge has two first connecting edges; the first connecting edge includes two first sub-connecting segments and a second sub-connecting segment connecting the two first sub-connecting segments, the angle between the first sub-connecting segment and the second sub-connecting segment is an obtuse angle, and the two first sub-connecting segments respectively connect two adjacent first side edges; The second black matrix opening has two second connecting edges and two second side edges; the second side edges include two first line segments and a second line segment connecting the two first line segments, the angle between the first line segment and the second line segment is an obtuse angle, and the two first line segments respectively connect two adjacent second connecting edges; The first side of the green pixel opening is opposite to the second connecting side of the second black matrix opening; the first connecting side of the green pixel opening is opposite to the second side of the second black matrix opening.

11. The display substrate according to claim 1, wherein: The plurality of light-emitting devices include a red light-emitting device, a green light-emitting device and a blue light-emitting device; the pixel opening corresponding to the red light-emitting device is a red pixel opening, the pixel opening corresponding to the green light-emitting device is a green pixel opening, and the pixel opening corresponding to the blue light-emitting device is a blue pixel opening; The black matrix openings corresponding to the red pixel openings are first black matrix openings, the black matrix openings corresponding to the green pixel openings are second black matrix openings, and the black matrix openings corresponding to the blue pixel openings are third black matrix openings; The red pixel opening and the first black matrix opening have the same shape, which is circular or elliptical; and / or, The blue pixel opening and the third black matrix opening have the same shape, which is circular or elliptical.

12. The display substrate according to claim 11, wherein: The green pixel opening has two first side edges and two first connecting edges, the two first side edges are arranged opposite to each other and both extend along the first direction or the second direction; the first connecting edge is an arc edge; and the second black matrix opening is circular.

13. The display substrate according to any one of claims 1 to 12, wherein: The first connecting edge is a straight line edge or an arc edge.

14. A display device comprising the display substrate according to any one of claims 1 to 13.

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