Display substrate, display module and display screen

Abstract

The invention discloses a display substrate, a display module and a display screen, and belongs to the technical field of display. The display substrate comprises a back plate and a plurality of light-emitting units located on one side of the back plate. One of the first edge and the second edge of the back plate is arranged to be a straight line edge, and the other edge is arranged to be a curve edge, so that the splicing effect after the display substrate is assembled into a display screen can be improved on the basis of ensuring that the display substrate can be produced. Moreover, for the row of light-emitting units closest to the first edge, the distance between the light-emitting unit closest to the first edge and the first edge is set to be smaller than or equal to the distance between two adjacent light-emitting units, so that a splicing seam existing between the display substrates can be made up, the uniformity of the distance between the adjacent light-emitting units in the display screen is improved, and the display effect is improved. Therefore, the splicing effect of the multiple display substrates in the display screen can be improved, and the visual effect of the display screen can be improved.

Description

[0001] This application is a divisional application of the invention patent application with the application date of April 24, 2025, application number: 202510524387.9, and invention name: "Display substrate, display module and display screen". Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display substrate, a display module, and a display screen. Background Art

[0003] Special-shaped displays are irregularly shaped. Currently, spherical displays are widely used in various fields, such as sports simulators and driving simulators, to achieve richer and more vivid display effects. Spherical displays are usually composed of multiple display modules.

[0004] However, the splicing effect of the multiple display modules in the above-mentioned spherical display screen is poor, resulting in poor visual effects of the spherical display screen. Summary of the Invention

[0005] The embodiments of the present application provide a display substrate, a display module, and a display screen. The technical solution is as follows:

[0006] According to a first aspect of the present application, there is provided a display substrate, comprising: a backplane, and a plurality of light-emitting units located on one side of the backplane;

[0007] The back plate has: a pair of first sides arranged opposite to each other in a first direction, and a pair of second sides arranged opposite to each other in a second direction; one of the first sides and the second sides is a straight side, and the other is a curved side;

[0008] Wherein, for the row of light-emitting units closest to the first side, in the arrangement direction of the light-emitting units in a row, the distance between the center of the orthographic projection of the light-emitting unit closest to the second side in the row of light-emitting units on the back panel and the second side is less than or equal to half of the distance between the centers of two adjacent light-emitting units in the row of light-emitting units, and / or,

[0009] For the row of light-emitting units closest to the second edge, in the arrangement direction of the light-emitting units in a row, the distance between the center of the orthographic projection of the light-emitting unit in a row closest to the first edge on the back panel and the first edge is less than or equal to half of the distance between the centers of two adjacent light-emitting units in the row.

[0010] Optionally, the first side is a straight side, and the second side is a curved side; a pair of the first sides are a first straight side and a second straight side, and a pair of the second sides are a first curved side and a second curved side;

[0011] The extension line of the first straight edge intersects with the extension line of the second straight edge; at least part of the first curved edge and the second curved edge are arc edges, the extension length of the first curved edge is less than the extension length of the second curved edge, and the center point of the arc edge in the first curved edge and the center point of the arc edge in the second curved edge are both located on the side of the first curved edge away from the second curved edge.

[0012] Optionally, the centers of the arc edges in the first curved edge and the second curved edge are both the intersection points of the extension lines of the first straight edge and the extension lines of the second straight edge; the first straight edge and the second straight edge are symmetrically arranged along the axis connecting the centers of the first curved edge and the center of the backplane.

[0013] Optionally, the back plate is in the shape of a fan ring, at least one corner of the back plate has a chamfer, and the chamfered edge of the chamfer is a straight edge or a curved edge.

[0014] Optionally, a chamfer is provided between the first curved edge and the first straight edge, and / or a chamfer is provided between the first curved edge and the second straight edge.

[0015] Optionally, the chamfer between the first straight edge and the first curved edge is a first chamfer; an intersection of the chamfered edge of the first chamfer and the first straight edge is a first intersection, an intersection of an extension line of the first curved edge and an extension line of the first straight edge is a second intersection, and an intersection of the chamfered edge of the first chamfer and the first curved edge is a third intersection;

[0016] A first distance between the second intersection point and the first intersection point is smaller than a second distance between the second intersection point and the third intersection point.

[0017] Optionally, a ratio of the second distance to the first distance is in the range of 5 to 15.

[0018] Optionally, the chamfer between the first straight edge and the first curved edge is a first chamfer; the intersection of the chamfered edge of the first chamfer and the first straight edge is a first intersection, and the intersection of the extension line of the first curved edge and the extension line of the first straight edge is a second intersection; the plurality of light-emitting units are arranged in a plurality of rows along the second direction;

[0019] The chamfered edge of the first chamfer satisfies:

[0020] B1≤0.8*P s;

[0021] Wherein, B1 is the distance between the first intersection point and the second intersection point; s is the minimum value of the row spacing between any two adjacent rows of the light-emitting units.

[0022] Optionally, the back panel has a main display area and a first chamfered display area, and the first chamfered display area is closer to the first chamfer than the main display area;

[0023] In the second direction, a distance between centers of two adjacent light-emitting units distributed in the first chamfered display area is smaller than a distance between centers of two adjacent light-emitting units distributed in the main display area.

[0024] Optionally, in the first chamfered display area, for any row of light-emitting units arranged in the second direction, the distance between the centers of two adjacent light-emitting units in the row gradually increases along the direction from the first curved edge to the second curved edge, and / or,

[0025] The multiple light-emitting units in the first chamfered display area are divided into multiple first light-emitting unit groups, and one first light-emitting unit group includes two adjacent light-emitting units arranged in the second direction. For any row of first light-emitting unit groups arranged in the first direction, the distance between the centers of two adjacent light-emitting units in each first light-emitting unit group gradually increases along the direction from the first straight line edge to the second straight line edge.

[0026] Optionally, the multiple light-emitting units are arranged into multiple rows along the second direction, and at least some of the rows of light-emitting units correspond to multiple first reference lines respectively, and the centers of the multiple light-emitting units in the same row of light-emitting units are all located on a corresponding first reference line; the two endpoints of the first reference line are respectively on the first straight line edge and the second straight line edge, and the first reference line is an arc, and the center of the first reference line is the intersection of the extension line of the first straight line edge and the extension line of the second straight line edge.

[0027] Optionally, the light-emitting units in the plurality of rows satisfy:

[0028] D1=λ3*0.5*P v ;

[0029] Wherein, D1 is the minimum distance between the first reference line corresponding to the row of light-emitting units closest to the first curved edge and the first curved edge; λ3 is the third correction coefficient, and the value range of λ3 is: 0.7~1.0; v is the row spacing between two adjacent rows of light-emitting units.

[0030] Optionally, a line connecting the center of the light-emitting unit and the center of the first reference line is a second reference line corresponding to the light-emitting unit;

[0031] The light-emitting units in any row satisfy:

[0032] A n =λ4*0.5*P A_n ;

[0033] Among them, A n is the angle between the second reference line corresponding to the light emitting unit closest to the first straight edge in the nth row of light emitting units and the first straight edge; λ4 is the fourth correction coefficient, and the value range of λ4 is: 0.7 to 1.0; P A n is the angle between the second reference lines corresponding to two adjacent light-emitting units in the nth row of light-emitting units.

[0034] Optionally, two sides of the light emitting unit that are arranged opposite to each other in the first direction are parallel to a second reference line corresponding to the light emitting unit.

[0035] Optionally, the second side is a straight side, and the first side is a curved side; a pair of the second sides are a third straight side and a fourth straight side, and a pair of the first sides are a third curved side and a fourth curved side;

[0036] The third straight edge is parallel to the fourth straight edge, and an extension length of the third straight edge is less than an extension length of the fourth straight edge; the third curved edge and the fourth curved edge both protrude in a direction away from the center of the back plate.

[0037] Optionally, the third curved edge and the fourth curved edge are symmetrically arranged along the center line of the display substrate, and the midpoint of the third straight edge and the midpoint of the fourth straight edge are both located on the center line of the display substrate.

[0038] Optionally, the back plate is in the shape of a curved trapezoid, at least one corner of the back plate has a chamfer, and the chamfered edge of the chamfer is a straight edge or a curved edge.

[0039] Optionally, a chamfer is provided between the third straight line side and the third curved line side, and / or a chamfer is provided between the third straight line side and the fourth curved line side.

[0040] Optionally, the chamfer between the third straight edge and the third curved edge is a second chamfer; the intersection of the chamfered edge of the second chamfer and the third curved edge is a fourth intersection, the intersection of an extension line of the third straight edge and an extension line of the third curved edge is a fifth intersection, and the intersection of the chamfered edge of the second chamfer and the third straight edge is a sixth intersection;

[0041] The third distance between the fifth intersection point and the fourth intersection point is greater than the fourth distance between the fifth intersection point and the sixth intersection point.

[0042] Optionally, the ratio of the third distance to the fourth distance is in the range of 5 to 15.

[0043] Optionally, the chamfer between the third straight edge and the third curved edge is a second chamfer; the intersection of an extension line of the third straight edge and an extension line of the third curved edge is a fifth intersection; the intersection of the chamfered edge of the second chamfer and the third straight edge is a sixth intersection; the plurality of light-emitting units are arranged in a plurality of rows along the second direction;

[0044] The chamfered edge of the second chamfer satisfies:

[0045] B4≤0.8*P s ;

[0046] Wherein, B4 is the distance between the fifth intersection and the sixth intersection; s is the minimum value of the row spacing between any two adjacent rows of the light-emitting units.

[0047] Optionally, the back panel has a main display area and a second chamfered display area, and the second chamfered display area is closer to the second chamfer than the main display area;

[0048] In the first direction, a distance between centers of two adjacent light-emitting units distributed in the second chamfered display area is smaller than a distance between centers of two adjacent light-emitting units distributed in the main display area.

[0049] Optionally, in the second chamfered display area, for any row of light-emitting units arranged in the first direction, the distance between the centers of two adjacent light-emitting units in the row gradually increases along the direction from the third curved edge to the fourth curved edge, and / or,

[0050] The multiple light-emitting units in the second chamfered display area are divided into multiple second light-emitting unit groups, and one second light-emitting unit group includes two adjacent light-emitting units arranged in the first direction. For any row of first light-emitting unit groups arranged in the second direction, the distance between the centers of two adjacent light-emitting units in each second light-emitting unit group gradually increases along the direction from the third straight line edge to the fourth straight line edge.

[0051] Optionally, the multiple light-emitting units are arranged into multiple rows along the second direction, the multiple rows of light-emitting units correspond to multiple designated line segments respectively, and the centers of the multiple light-emitting units in the same row are all located on a corresponding designated line segment; the two endpoints of the designated line segment are respectively on the third curved edge and the fourth curved edge, and the designated line segment is parallel to the third straight line edge.

[0052] Optionally, the third curved edge and the fourth curved edge are symmetrically arranged along a center line of the display substrate;

[0053] The light-emitting units in the plurality of rows satisfy:

[0054] S1=λ6*0.5*P L ;

[0055] Wherein, S1 is the minimum distance between the designated line segment corresponding to the row of light-emitting units closest to the third straight line edge and the third straight line edge; λ6 is the sixth correction coefficient, and the value range of λ6 is: 0.5~1.0; P L is the row spacing between two adjacent rows of light-emitting units.

[0056] Optionally, the light-emitting units in any row satisfy:

[0057] S n =λ7*0.5*P p ;

[0058] Among them, the S n is the distance between the center of the light emitting unit closest to the third curved edge in the nth row and the third curved edge; λ7 is the seventh correction coefficient, and the value range of λ7 is: 0.5~1.0, the P p is the distance between the centers of two adjacent light-emitting units in the nth row.

[0059] In a second aspect, a display module is provided, comprising: a housing, and at least one display substrate located on one side of the housing, wherein the display substrate is any of the above-mentioned display substrates.

[0060] In a third aspect, a display screen is provided, comprising: a plurality of spliced ​​display modules, wherein the display modules are the above-mentioned display modules, and the display surface of the display screen is a curved surface.

[0061] Optionally, the display screen extends into a spherical surface; the first side of each display substrate in the display screen is a straight side, and the second side is a curved side; a pair of the first sides are respectively a first straight side and a second straight side, and a pair of the second sides are respectively a first curved side and a second curved side; the first side corresponds to a longitude of the spherical surface where the display screen is located, and the second side corresponds to a latitude of the spherical surface where the display screen is located;

[0062] After the display substrate is assembled into the display screen, the plane enclosed by the first curved side and the center of the display screen is a first plane, and the plane enclosed by the second curved side and the center of the display screen is a second plane; the meridian plane corresponding to the meridian line in the display screen that coincides with the first straight side is a first meridian plane, and the meridian plane corresponding to the meridian line in the display screen that coincides with the second straight side is a second meridian plane; the first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen;

[0063] The curvatures of the first curved side and the second curved side satisfy:

[0064] K1=λ1 / (π*cosγ1*R1*(β / 360°) / β*sin(2γ1));

[0065] K2=λ2 / (π*cosγ2*R1*(β / 360°) / β*sin(2γ2));

[0066] Among them, K1 is the curvature of the first curved edge of the display substrate in the flattened state; λ1 is the first correction coefficient, and the value range of λ1 is: 1 to 1.05; γ1 is the angle between the first plane and the equatorial plane of the display screen; R1 is the radius of the sphere on which the display screen is located; β is the angle between the first meridian plane and the second meridian plane; K2 is the curvature of the second curved edge of the display substrate in the flattened state; λ2 is the second correction coefficient, and the value range of λ2 is: 0.95 to 1; γ2 is the angle between the second plane and the equatorial plane of the display screen.

[0067] Optionally, the two adjacent display substrates in the meridian direction of the display screen are respectively: a first display substrate and a second display substrate, and the first display substrate is closer to the equatorial plane of the display screen than the second display substrate;

[0068] A first correction coefficient corresponding to the curvature of the first curved side in the first display substrate is smaller than a first correction coefficient corresponding to the curvature of the first curved side in the second display substrate;

[0069] The second correction coefficient corresponding to the curvature of the second curved side in the first display substrate is greater than the second correction coefficient corresponding to the curvature of the second curved side in the second display substrate.

[0070] Optionally, the display screen extends into a spherical surface; the first side of each display substrate in the display screen is a straight side, and the second side is a curved side; a pair of the first sides are respectively a first straight side and a second straight side, and a pair of the second sides are respectively a first curved side and a second curved side; the first side corresponds to a longitude of the spherical surface where the display screen is located, and the second side corresponds to a latitude of the spherical surface where the display screen is located;

[0071] After the display substrate is assembled into the display screen, the plane enclosed by the first curved side and the center of the display screen is a first plane, and the plane enclosed by the second curved side and the center of the display screen is a second plane; the meridian plane corresponding to the meridian line in the display screen that coincides with the first straight side is a first meridian plane, and the meridian plane corresponding to the meridian line in the display screen that coincides with the second straight side is a second meridian plane; the first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen;

[0072] The display substrate, in a flattened state, satisfies:

[0073] L1=2π*cosγ1*R1*(β / 360°);

[0074] L2=2π*cosγ2*R1*(β / 360°);

[0075] α=2β*sin(2γ1);

[0076] L3=L4=π*cos(γ2-γ1)*R1*(β / 360°) / β*sin(2γ1);

[0077] Wherein, L1 is the extended length of the first curved side; γ1 is the angle between the first plane and the equatorial plane of the display screen; R1 is the radius of the sphere on which the display screen is located; β is the angle between the first meridian plane and the second meridian plane; L2 is the extended length of the second curved side; γ2 is the angle between the second plane and the equatorial plane of the display screen; α is the angle between the extended line of the first straight side and the extended line of the second straight side when the display substrate is flattened; L3 is the extended length of the first straight side; and L4 is the extended length of the second straight side.

[0078] Optionally, the display screen extends into a spherical surface; the second side of each display substrate in the display screen is a straight side, and the first side is a curved side; a pair of the second sides are a third straight side and a fourth straight side, respectively, and a pair of the first sides are a third curved side and a fourth curved side, respectively; the first side corresponds to a longitude of the spherical surface on which the display screen is located, and the second side corresponds to a latitude of the spherical surface on which the display screen is located;

[0079] After the display substrate is assembled into the display screen, a plane enclosed by any designated line segment in the display substrate that is parallel to the third straight edge and the center of the display screen is a fifth plane, and two endpoints of the designated line segment are respectively on the third curved edge and the fourth curved edge; a meridian plane corresponding to a meridian line in the display screen that coincides with the third curved edge is a third meridian plane, and a meridian plane corresponding to a meridian line in the display screen that coincides with the fourth curved edge is a fourth meridian plane; the first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen;

[0080] The display substrate satisfies:

[0081] L x =λ x *(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ x )) 2 ));

[0082] Among them, the L x is the extension length of the specified line segment; x is the fifth correction coefficient of the specified line segment, the λ x The value range of is: 0.95~1; R1 is the radius of the display screen; β is the angle between the third meridian plane and the fourth meridian plane; γ x is the angle between the fifth plane and the equatorial plane of the display screen.

[0083] Optionally, the two display substrates adjacent to each other in the meridian direction of the display screen are respectively: a third display substrate and a fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate;

[0084] The fifth correction coefficient of the designated line segment in the third display substrate is smaller than the fifth correction coefficient of the designated line segment in the fourth display substrate.

[0085] Optionally, after the display substrate is assembled into the display screen, a plane enclosed by the third straight line side and the spherical center of the display screen is a third plane, and a plane enclosed by the fourth straight line side and the spherical center of the display screen is a fourth plane;

[0086] The display substrate satisfies:

[0087] L5=λ8*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 ));

[0088] L6=λ9*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 ));

[0089] Among them, L5 is the extension length of the third straight edge; λ8 is the eighth correction coefficient of the third straight edge, and the value range of λ8 is: 0.95~1; γ3 is the angle between the third plane and the equatorial plane of the display screen; L6 is the extension length of the fourth straight edge; λ9 is the ninth correction coefficient of the fourth straight edge, and the value range of λ9 is: 0.95~1; γ4 is the angle between the fourth plane and the equatorial plane of the display screen.

[0090] Optionally, the two display substrates adjacent to each other in the meridian direction of the display screen are respectively: a third display substrate and a fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate;

[0091] The eighth correction coefficient of the third straight line side in the third display substrate is smaller than the eighth correction coefficient of the third straight line side in the fourth display substrate, and / or,

[0092] The ninth correction coefficient of the fourth straight line side in the third display substrate is smaller than the ninth correction coefficient of the fourth straight line side in the fourth display substrate.

[0093] Optionally, the display screen extends into a spherical surface; the second side of each display substrate in the display screen is a straight side, and the first side is a curved side; a pair of the second sides are a third straight side and a fourth straight side, respectively, and a pair of the first sides are a third curved side and a fourth curved side, respectively; the first side corresponds to a longitude of the spherical surface on which the display screen is located, and the second side corresponds to a latitude of the spherical surface on which the display screen is located; the third curved side and the fourth curved side are symmetrically arranged along a center line of the display substrate;

[0094] After the display substrate is assembled into the display screen, the plane enclosed by the third straight edge and the center of the display screen is the third plane, the plane enclosed by the fourth straight edge and the center of the display screen is the fourth plane, the meridian plane corresponding to the meridian line in the display screen that coincides with the third curved edge is the third meridian plane, and the meridian plane corresponding to the meridian line in the display screen that coincides with the fourth curved edge is the fourth meridian plane; the first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen; the display substrate satisfies the following conditions:

[0095] L5=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 );

[0096] L6=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 );

[0097] M1=R1*(γ3-γ4) / 180°*π;

[0098] Wherein, L5 is the extended length of the third straight side; R1 is the radius of the display screen; β is the angle between the third meridian plane and the fourth meridian plane; γ3 is the angle between the third plane and the equatorial plane of the display screen; L6 is the extended length of the fourth straight side; and γ4 is the angle between the fourth plane and the equatorial plane of the display screen.

[0099] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0100] By configuring one of the first and second sides of the backplane as a straight side and the other as a curved side, the display substrates can be assembled into a display screen while ensuring that they can be produced. Furthermore, for the row of light-emitting units closest to the first side, by configuring the spacing between the light-emitting unit closest to the first side to be less than or equal to the spacing between two adjacent light-emitting units, this can compensate for the gaps between the display substrates and improve the uniformity of the spacing between adjacent light-emitting units within the display screen. This improves the splicing of multiple display substrates within the display screen, further enhancing the visual quality of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0102] Figure 1 It is a structural diagram of a standard sphere;

[0103] Figure 2 This is a schematic structural diagram of a display substrate provided in an embodiment of the present application;

[0104] Figure 3 is a structural schematic diagram of another display substrate provided in an embodiment of the present application;

[0105] Figure 4 yes Figure 2 A partial enlarged view of the display substrate at Q1 is provided;

[0106] Figure 5 This is a schematic diagram of a division method of a display substrate provided in an embodiment of the present application;

[0107] Figure 6 This is a schematic structural diagram of a spherical rotation unit provided in an embodiment of the present application;

[0108] Figure 7 This is a structural diagram of another display substrate provided in an embodiment of the present application;

[0109] Figure 8 yes Figure 7 A schematic diagram of the structure of the provided display substrate assembled into a display screen;

[0110] Figure 9 This is a schematic structural diagram of a backplane in a display substrate provided in an embodiment of the present application;

[0111] Figure 10 yes Figure 9 A partial enlarged view of the back panel at Q3 is provided;

[0112] Figure 11 yes Figure 7 A partial enlarged view of the display substrate at position Q2 is provided;

[0113] Figure 12 yes Figure 9 Another partial enlarged image of the backplane at Q3 is provided;

[0114] Figure 13 yes Figure 9 Another partial enlarged view of the back panel at Q3 is provided;

[0115] Figure 14 This is a schematic diagram of a divided structure of another display substrate provided in an embodiment of the present application;

[0116] Figure 15 1 is a schematic structural diagram of another display substrate provided in an embodiment of the present application;

[0117] Figure 16 yes Figure 14 A schematic diagram of the structure of the provided display substrate assembled into a display screen;

[0118] Figure 17 This is a schematic structural diagram of another backplane in a display substrate provided in an embodiment of the present application;

[0119] Figure 18 yes Figure 17 A partial enlarged view of the back panel at Q5 is provided;

[0120] Figure 19 yes Figure 15 A partial enlarged view of the display substrate at position Q4 is provided;

[0121] Figure 20 yes Figure 17 Another partial enlarged view of the back panel at Q5 is provided;

[0122] Figure 21 yes Figure 17 Another partial enlarged view of the back panel at Q5 is provided;

[0123] Figure 22 yes Figure 2 A top view of a light-emitting unit in a display substrate is provided.

[0124] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0125] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0126] The display substrate provided in the embodiment of the present application can be used for assembly in a display screen extending in a spherical or ellipsoidal surface. Figure 1 , Figure 1 This is a schematic diagram of the structure of a standard sphere. By dividing sphere A along latitude X1 and longitude X2, sphere A can be divided into multiple structural units A3 of specific shapes. These structural units A3 are two-dimensional surfaces with curved edges, making them impossible to flatten into a single plane. In other words, display substrates cannot be produced using the shape of these structural units A3. Therefore, in some related technologies, all edges of display substrates are designed as straight lines. However, when multiple display substrates are spliced ​​together, noticeable seams are created between them, resulting in poor display quality.

[0127] The present application embodiment provides a display substrate, please refer to Figure 2 and Figure 3 , Figure 2 is a structural diagram of a display substrate provided in an embodiment of the present application, Figure 3 FIG2 is a schematic diagram of the structure of another display substrate provided in an embodiment of the present application. The structural features of the display substrate 10 mentioned in the embodiment of the present application are all features of the display substrate 10 in a flat state. The display substrate 10 includes: a backplane 11, and a plurality of light-emitting units 12 located on one side of the backplane 11.

[0128] The backplane 11 is used to carry a plurality of light-emitting units 12. The backplane 11 may include: a substrate, and a driving circuit located on the substrate, the driving circuit being electrically connected to the plurality of light-emitting units 12, so that the backplane 11 can be used to provide driving signals for each light-emitting unit 12. The substrate in the backplane 11 may be a flexible substrate or a tough substrate (for example, a metal substrate such as a PCB board, PMMA, PI or aluminum material). When the display substrate 10 is assembled in a display screen, the display substrate 10 can be bent, so that the splicing effect of the plurality of display substrates 10 can be better. However, the embodiment of the present application does not limit this. The substrate in the backplane 11 may also be a rigid substrate (for example, the substrate material may be glass), as long as it can be processed into the target shape.

[0129] The back panel 11 has a pair of first edges C1 disposed opposite to each other in the first direction Y1, and a pair of second edges C2 disposed opposite to each other in the second direction Y2. One of the first edge C1 and the second edge C2 is a straight edge, and the other is a curved edge. This includes the following two cases: For the first case, please refer to Figure 2 , the first side C1 is a straight line side, and the second side C2 is a curved side. For the second case, please refer to Figure 3 , the second side C2 is a straight side, and the first side C1 is a curved side.

[0130] It should be noted that one of the first side C1 and the second side C2 is a straight side, and the other is a curved side. This refers to the external shape of the display substrate 10 when flattened. When the display substrate 10 is assembled in a display screen extending in the shape of a spherical surface, the display substrate 10 can be bent along the first direction Y1 or the second direction Y2, thereby allowing the display substrate 10 to better conform to the spherical or ellipsoidal surface, thereby improving the splicing effect.

[0131] The light-emitting unit 12 can serve as a light source. Multiple light-emitting units 12 can be electrically connected to the drive circuit of the backplane 11 and emit light under the control of the backplane 11. Optionally, the light-emitting unit 12 can include a light-emitting diode (LED) chip. The light-emitting unit 12 can be a regular-sized LED chip, a mini-LED chip, or a micro-LED chip.

[0132] It should be noted that the light-emitting unit 12 can be an all-in-one device, that is, a plurality of LED chips are simultaneously encapsulated in the light-emitting unit 12, for example, LED chips of three colors of red, green and blue. Exemplarily, the light-emitting unit 12 can adopt surface mount (English: Surface Mounted Devices, abbreviated: SMD) technology, or micro light-emitting diode integrated package (English: Micro LED in Package, abbreviated: MIP) technology. In this case, the boundary of the light-emitting unit 12 can be defined as the outer contour of the entire packaging structure that encapsulates multiple LED chips, and the center of the orthographic projection of the light-emitting unit 12 on the back panel 11 is the center of the orthographic projection of the outer contour of the packaging structure on the back panel 11.

[0133] Please refer to Figure 22 , Figure 22 yes Figure 2 A top view of a light emitting unit in a display substrate is provided. The light emitting unit 12 may also be a plurality of LED chips 121 independently arranged from each other, for example, including LED chips 121 of three colors of red, green and blue independently arranged from each other. For example, Figure 22 The shape of the LED chips 121 shown is rectangular, and the three colors of LED chips can be arranged in a row. However, the embodiment of the present application does not limit the shape and arrangement of the LED chips 121. In this case, the boundary of the light-emitting unit 12 can be defined as the outer contour of the multiple LED chips 121 (such as Figure 2 The center 12 - a of the orthographic projection of the light-emitting unit 12 on the back plate 11 is the center of the orthographic projection of the outer contours of the plurality of LED chips 121 on the back plate 11 .

[0134] For the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the second side C2 in the row of light-emitting units 12 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, for the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the second side C2 in the row of light-emitting units 12 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of first sides C1 is 2, and therefore the number of light-emitting units 12 in the row closest to the first side C1 can be 2, and the above condition can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0135] And / or, for the row of light-emitting units 12 closest to the second side C2, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the first side C1 in the row of light-emitting units 12 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, for the row of light-emitting units 12 closest to the second side C2, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the first side C1 in the row of light-emitting units 12 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of second sides C2 is two, and therefore the number of light-emitting units 12 in the row closest to the second side C2 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0136] Furthermore, in some embodiments, Figure 2 and Figure 3 As shown, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the second side C2 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the second side C2 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row. It will be understood that the number of second sides C2 is two, so the number of light-emitting units 12 in the row closest to the second side C2 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0137] and / or, in some embodiments, as Figure 2 and Figure 3 As shown, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row. It will be understood that the number of second sides C2 is two, so the number of light-emitting units 12 in the row closest to the first side C1 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0138] by Figure 2 Take one corner of the display substrate 10 as an example, please refer to Figure 4 , Figure 4 yes Figure 2 A partial enlarged view of the display substrate at Q1 is provided. The row of light emitting units 12 closest to the first side C1 may be the row of light emitting units 12 where the light emitting units P1 and P3 are located. Here, the distance D1 between the center of the light emitting unit P1 and the second side C2 is set to be less than or equal to the distance P between the centers of the light emitting units P1 and P3. v That is, by reducing the distance D1 between the light-emitting unit P1 and the second side C2, the possible splicing seams between adjacent display substrates 10 in the display screen in the second direction Y2 can be compensated, thereby reducing the difference in the center spacing of the light-emitting units 12 at the splicing location in the second direction Y2 and the center spacing of the light-emitting units 12 in other areas, thereby improving the splicing effect of multiple display substrates 10 in the display screen.

[0139] by Figure 2 Take one corner of the display substrate 10 as an example, please refer to Figure 4 The row of light-emitting units 12 closest to the second side C2 may be the row of light-emitting units 12 where the light-emitting units P1 and the light-emitting units P2 are located. Here, the distance D2 between the center of the light-emitting unit P1 and the second side C2 is set to be less than or equal to half of the distance D3 between the centers of the light-emitting unit P1 and the light-emitting unit P2. That is, by reducing the distance D2 between the light-emitting unit P1 and the first side C1, the possible splicing seams between adjacent display substrates 10 in the display screen in the first direction Y1 can be compensated, thereby reducing the difference in the center distance between the light-emitting units 12 at the splicing point in the first direction Y1 and the center distance between the light-emitting units 12 in other areas, thereby improving the splicing effect of multiple display substrates 10 in the display screen.

[0140] Furthermore, in some embodiments, Figure 3 As shown, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the second side C2 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the second side C2 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row. It will be understood that the number of second sides C2 is two, so the number of light-emitting units 12 in the row closest to the second side C2 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0141] and / or, in some embodiments, as Figure 3 As shown, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of second sides C2 is two, so the number of light-emitting units 12 in the row closest to the first side C1 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0142] It should be noted that the arrangement direction of a row of light emitting units 12 can be approximately the overall extension direction of the line connecting the centers of the row of light emitting units 12. For the row of light emitting units 12 closest to the first side C1, its arrangement direction is approximately the same as the overall extension direction of the adjacent first side C1. For the row of light emitting units 12 closest to the second side C2, its arrangement direction is approximately the same as the overall extension direction of the adjacent second side C2. For example, Figure 2 In the display substrate 10 shown, the arrangement direction of the row of light-emitting units 12 closest to the first side C1 is the extension direction of an arc. Therefore, the center distance between two adjacent light-emitting units 12 in the arrangement direction is the length of the arc segment between the centers of the two adjacent light-emitting units 12. However, this embodiment of the application is not limited to this, and it can also be approximated as the minimum distance between the centers of two adjacent light-emitting units 12 for ease of calculation. Figure 3 In the display substrate 10 shown, the arrangement direction of the row of light emitting units 12 closest to the first side C1 is an extending direction of a straight line.

[0143] Based on the above setting method, the effect of reducing the distance between the light-emitting unit 12 and the outer contour of the back panel 11 in the first direction Y1 and / or the second direction Y2 can be achieved. For a display screen equipped with multiple display substrates 10, this can improve the uniformity of the spacing between adjacent light-emitting units in at least one direction of the display screen, thereby improving the splicing effect of the display screen.

[0144] In summary, the embodiments of the present application provide a display substrate. By setting one of the first and second sides of the backplane to be a straight side and the other to be a curved side, the display substrate can be assembled into a display screen while ensuring that the display substrate can be produced. Furthermore, for the row of light-emitting units closest to the first side, by setting the spacing between the light-emitting unit closest to the first side to be less than or equal to the spacing between two adjacent light-emitting units, this can be used to compensate for the seams between the display substrates and improve the uniformity of the spacing between adjacent light-emitting units in the display screen, thereby improving the splicing effect of multiple display substrates in the display screen and, in turn, improving the visual effect of the display screen.

[0145] The embodiments of the present application can use multiple division methods to determine the structure of a single display substrate in a display screen. The following two exemplary embodiments are used for illustration:

[0146] In the first exemplary embodiment, please refer to Figure 5 , Figure 5 Schematic diagram of a display substrate division method provided in an embodiment of the present application. The division method may include:

[0147] (1) The spherical surface A is transversely divided along the latitude direction. Transverse division refers to dividing the spherical surface A by multiple planes parallel to the equatorial plane to obtain multiple annular surfaces A1. The multiple planes parallel to the equatorial plane used for transverse division can be arranged at equal distances.

[0148] It should be noted that Figure 5 The sphere A in the figure is not a standard sphere. Please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of a spherical rotation unit provided in an embodiment of the present application. Rotation unit A4 is polygonal in shape, with its longest side serving as rotation axis A41. The sides opposite axis A41 are formed by connecting multiple straight line segments, not a single curve. Rotating unit A4 one revolution along axis A41 yields spherical surface A. Thus, the multiple torus surfaces A1 formed by dividing spherical surface A are all one-dimensional surfaces.

[0149] (2) Vertically dividing the multiple annular surfaces A1 along the meridian direction. Vertical division refers to dividing the spherical surface A through multiple meridian planes to obtain multiple petal planes A2. The multiple meridian planes used for vertical division can be set at equal angles.

[0150] (3) After horizontal and vertical segmentation, the spherical surface A can be divided into a plurality of structural units A3, and the structural units A3 can be flattened along the latitude direction. In the flattened state, the two opposing sides of the structural units A3 in the longitudinal direction are curved sides, and the two opposing sides in the latitude direction are straight sides. Thus, the shape and structure of the display substrate can be determined based on the structural units A3. Here, the display substrate can be flat during manufacturing and can be curved when assembled into a display screen.

[0151] The display substrate obtained by the embodiment of the present application based on the first division method is shown in FIG. Figure 7 , Figure 7 It is a structural schematic diagram of another display substrate provided in an embodiment of the present application. The structural features of the display substrate 10 obtained by the first division method mentioned in the embodiment of the present application are all features of the display substrate 10 in a flattened state. The display substrate 10 includes: a back panel 11, and a plurality of light-emitting units 12 located on one side of the back panel 11. The back panel 11 has: a pair of first edges C1 arranged opposite to each other in the first direction Y1, and a pair of second edges C2 arranged opposite to each other in the second direction Y2. The first edge C1 is a straight edge, and the second edge C2 is a curved edge. The pair of first edges C1 are respectively a first straight edge C11 and a second straight edge C12, and the pair of second edges C2 are respectively a first curved edge C21 and a second curved edge C22.

[0152] The extension line of the first straight edge C11 intersects the extension line of the second straight edge C12 at point O1. At least a portion of the first curved edge C21 and the second curved edge C22 are arc edges, and the extension length of the first curved edge C21 is less than the extension length of the second curved edge C22. The different extension lengths of the first curved edge C21 and the second curved edge C22 better conform to the geometric characteristics of a sphere.

[0153] The center of the arc edge of the first curved edge C21 and the center of the arc edge of the second curved edge C22 are both located on the side of the first curved edge C21 away from the second curved edge C22. In other words, the first curved edge C22 and the second curved edge C22 both protrude in the same direction, which can reduce the joint seam when assembling the display substrate 10.

[0154] For the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the second side C2 in the row of light-emitting units 12 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, for the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the second side C2 in the row of light-emitting units 12 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of first sides C1 is 2, and therefore the number of light-emitting units 12 in the row closest to the first side C1 can be 2, and the above condition can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0155] And / or, for the row of light-emitting units 12 closest to the second side C2, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the first side C1 in the row of light-emitting units 12 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, for the row of light-emitting units 12 closest to the second side C2, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the first side C1 in the row of light-emitting units 12 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of second sides C2 is two, and therefore the number of light-emitting units 12 in the row closest to the second side C2 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0156] Further, in some embodiments, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the second side C2 on the back panel 11 and the second side C2 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first straight side C11 on the back panel 11 and the second side C2 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It can be understood that the number of second sides C2 is 2, such as the first curved side C21 and the second curved side C22, so the number of light-emitting units 12 in the row closest to the second side C2 can be 2, and the above situation can be met for each light-emitting unit 12 in the row closest to the second side C2. A specific embodiment is as follows: Figure 7 shown.

[0157] And / or, in some embodiments, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It can be understood that the number of first sides C1 is 2, such as the first straight side C11 and the second straight side C12, so the number of light-emitting units 12 in the row closest to the first side C1 can be 2, and the above situation can be met for each light-emitting unit 12 in the row closest to the first side C1. A specific embodiment is as follows. Figure 7 shown.

[0158] It should be noted that at least a portion of the first curved edge C21 and the second curved edge C22 is an arc edge. That is, the first curved edge C21 and the second curved edge C22 can be edges formed by connecting an arc edge with a straight edge, or the like, or both the first curved edge C21 and the second curved edge C22 can be arc edges. In addition, this application does not strictly require that the arc edges of the first curved edge C21 and the second curved edge C22 are all standard arc edges; certain manufacturing errors may occur.

[0159] For a display substrate 10 mounted closer to the south or north pole of the display screen, the extension length of the first curved edge C21 gradually decreases until the first curved edge C21 is reduced to a single point and coincides with the south or north pole. Therefore, the display substrate mounted at the south or north pole can be fan-shaped. Alternatively, the display substrate mounted at the south or north pole can be circular, meaning that the display substrate mounted at the south or north pole is not vertically split, which improves the splicing effect at the south or north pole.

[0160] In summary, embodiments of the present application provide a display substrate. In this embodiment, the first side of the backplane is a straight side, and the second side is a curved side. This ensures that the display substrate can be flattened for ease of production. At least a portion of the first curved side and the second curved side are arc-shaped sides, the first curved side extends less than the second curved side, and both the first curved side and the second curved side protrude in the same direction. This allows the shape of the display substrate to more closely conform to the geometric characteristics of a sphere, thereby reducing seams during assembly of the display substrate and improving the visual quality of a display screen equipped with the display substrate.

[0161] Optionally, the centers of the arcs of the first curved edge C21 and the second curved edge C22 are both the intersection O1 of the extension line of the first straight edge C11 and the extension line of the second straight edge C12. The first straight edge C11 and the second straight edge C12 are arranged symmetrically about the line connecting the center of the first curved edge C21 and the center of the backplane 11. This allows the display substrate 10 to have a more regular shape, facilitating manufacturing.

[0162] The following describes the dimensions of the display substrate provided by the first exemplary embodiment:

[0163] Alternatively, refer to Figure 7 and Figure 8 , Figure 8 yes Figure 7 A schematic diagram of the structure of a display substrate assembled within a display screen is provided. After the display substrate 10 is assembled within the spherically extending display screen 20, the plane enclosed by the first curved edge C21 and the center O2 of the display screen 20 is the first plane, and the plane enclosed by the second curved edge C22 and the center O2 of the display screen 20 is the second plane. The meridian plane corresponding to the meridian line of the display screen 20 that coincides with the first straight edge C11 is the first meridian plane, and the meridian plane corresponding to the meridian line of the display screen 20 that coincides with the second straight edge C12 is the second meridian plane. The first direction Y1 is parallel to the equatorial plane of the display screen, the second direction Y2 is parallel to the meridian plane of the display screen, and the third direction Y3 is parallel to the equatorial plane and perpendicular to the first direction Y1. The equatorial plane is the plane dividing the upper and lower hemispheres, and the meridian plane is the plane containing the meridian lines.

[0164] The display substrate 10 satisfies the following requirements in a flat state:

[0165] L1=2π*cosγ1*R1*(β / 360°);

[0166] L2=2π*cosγ2*R1*(β / 360°);

[0167] α=2β*sin(2γ1);

[0168] L3=L4=π*cos(γ1-γ2)*R1*(β / 360°) / β*sin(2γ1);

[0169] Wherein, L1 is the extended length of the first curved edge C21. γ1 is the angle between the first plane and the equatorial plane of the display screen 20. R1 is the radius of the display screen 20. β is the angle between the first meridian plane and the second meridian plane. L2 is the extended length of the second curved edge C22. γ2 is the angle between the second plane and the equatorial plane of the display screen 20. α is the angle between the extended line of the first straight edge C11 and the extended line of the second straight edge C12 when the display substrate 10 is flattened. L3 is the extended length of the first straight edge C11. L4 is the extended length of the second straight edge C12.

[0170] It should be noted that the extended length L1 of the first curved side C21, the extended length L2 of the second curved side C22, the included angle α, the extended length L3 of the first straight side C11, and the extended length L4 of the second straight side C12 are all structural features of the display substrate 10 in a flattened state. The included angles γ1, γ2, and β are all parameters determined based on the corresponding position of the display substrate 10 in an assembled state. Specifically, the display substrate 10 in an assembled state may be in a curved state.

[0171] In the embodiment of the present application, the size of the display substrate 10 in the first direction Y1 can range from 5 cm to 25 cm, and the size of the display substrate 10 in the second direction Y2 can range from 10 cm to 40 cm, which facilitates manufacturing and placement of circuit components.

[0172] Based on the radius R1 of the display screen 20 and the size range of the display substrate 10 in the first direction Y1, the number of display substrates 10 required to be divided into each annular surface can be determined, thereby determining the angle β. For example, when the number of display substrates 10 that can be divided into annular surfaces near the equator is set to 192, β = 360° / 192 = 1.875°.

[0173] Based on the radius R1 of the display screen 20 and the size range of the display substrate 10 in the second direction Y2, the number of annular surfaces required to be divided in the sphere can be determined, thereby determining the angles γ1 and γ2 corresponding to the display substrate 10.

[0174] The above formula can be used to calculate the dimensions of each side of the back plate 11 in the display substrate 10 and the included angle α. The included angle α not only reflects the inclination of the first straight edge C11 and the second straight edge C12, but also reflects the curvature of the first curved edge C21 and the second curved edge C22. This can improve the accuracy of determining the external dimensions of the display substrate 10, facilitating manufacturing based on the calculated external dimensions.

[0175] Under the influence of poor manufacturing precision of the display substrate 10 and assembly position deviation, the corners of the display substrate 10 may easily interfere with adjacent display substrates 10 during assembly. Therefore, the embodiment of the present application can modify the display substrate 10 to reduce the risk of interference.

[0176] In a possible implementation, the embodiment of the present application can adjust the curvature of the first curved edge C21 and the second curved edge C22 of the back plate 11 .

[0177] Optionally, refer to Figure 7 and Figure 8 , the curvatures of the first curved edge C21 and the second curved edge C22 satisfy:

[0178] K1=λ1 / (π*cosγ1*R1*(β / 360°) / β*sin(2γ1));

[0179] K2=λ2 / (π*cosγ2*R1*(β / 360°) / β*sin(2γ2));

[0180] Wherein, K1 is the curvature of the first curved edge C21 of the display substrate 10 in the flattened state. λ1 is the first correction coefficient, and the value range of λ1 is: 0.95-1. γ1 is the angle between the first plane and the equatorial plane of the display screen 20. R1 is the radius of the display screen 20. β is the angle between the first meridian plane and the second meridian plane. K2 is the curvature of the second curved edge C22 of the display substrate 10 in the flattened state. λ2 is the second correction coefficient, and the value range of λ2 is: 1-1.05. γ2 is the angle between the second plane and the equatorial plane of the display screen 20.

[0181] It should be noted that the curvature K1 and the curvature K2 are both structural features of the display substrate 10 in a flattened state.

[0182] The curvature of the first curved side C21 and the second curved side C22 in the display substrate 10 can be calculated using the above formula to reflect the degree of curvature of the first curved side C21 and the second curved side C22, thereby improving the accuracy of determining the external dimensions of the display substrate 10 and facilitating production based on the calculated curvatures of the first curved side C21 and the second curved side C22.

[0183] Based on the range of values ​​for the first correction coefficient λ1, it can be seen that by setting the first correction coefficient λ1 to be less than or equal to 1, it can be adapted to situations where there is no interference risk. Alternatively, if there is an interference risk, the curvature of the first curved edge C21 can be adjusted to a smaller value. Furthermore, by setting λ1 to be greater than or equal to 0.95, the curvature of the first curved edge C21 can be adjusted to a lesser degree, thereby preventing difficulties in manufacturing the display substrate 10.

[0184] Based on the value range of the second correction coefficient λ2, it can be seen that by setting the second correction coefficient λ2 to be greater than or equal to 1, it can be adapted to situations where there is no interference risk. Alternatively, if there is an interference risk, the curvature of the second curved edge C22 can be adjusted to be larger. Furthermore, by setting λ2 to be greater than or equal to 0.95, the curvature of the second curved edge C22 can be adjusted to be less than excessive, thereby preventing difficulties in manufacturing the display substrate 10.

[0185] Therefore, under the adjustment of the first correction coefficient λ1 and the second correction coefficient λ2, the protrusion of the corners of the display substrate 10 is smaller, the two end points of the first curved edge C21 can be slightly adjusted upward, and the two end points of the second curved edge C22 can be slightly adjusted downward. After the display substrates 10 are assembled into a display screen extending in a spherical shape, a certain assembly gap can exist between two adjacent display substrates 10, thereby reducing the risk of interference at the corners of the display substrates 10 and facilitating manufacturing and assembly.

[0186] It should be noted that when there is a risk of interference, λ1 is set to be greater than or equal to 0.95 and less than 1, and λ2 is set to be less than or equal to 1.05 and greater than 1 to achieve the shape correction of the display substrate 10. If the manufacturing accuracy and assembly accuracy of the display substrate 10 meet the requirements and the display substrate 10 is not prone to interference, the first correction coefficient λ1 and the second correction coefficient λ2 can also be set to 1, that is, the curvature of the first curved edge C21 and the second curved edge C22 do not need to be adjusted.

[0187] Optionally, for two display substrates 10 adjacent in the meridian direction of the display screen 20, the first correction coefficient λ1 corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 is greater than the first correction coefficient λ1 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10. Exemplarily, the first correction coefficient λ1 corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 may have a value range of 0.99 to 1.0, and the first correction coefficient λ1 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10 may have a value range of 0.95 to 0.98. When the angle α is large, the first correction coefficient λ1 may have a value range of 0.99 to 1.0. This better conforms to the geometric characteristics of a sphere, thereby improving the splicing effect of the display substrates 10.

[0188] For two display substrates 10 adjacent to each other in the meridian direction of the display screen 20, the second correction coefficient λ2 corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 is smaller than the second correction coefficient λ2 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10. For example, the second correction coefficient λ2 corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 may have a value range of 1.0 to 1.01, while the second correction coefficient λ2 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10 may have a value range of 1.0 to 1.05. When the angle α is large, the second correction coefficient λ2 may have a value range of 1.0 to 1.01. This better conforms to the geometric characteristics of a sphere, thereby improving the splicing effect of the display substrates 10.

[0189] In another possible implementation, the embodiment of the present application may provide chamfers on the corners of the back plate 11 .

[0190] Please refer to Figure 9 , Figure 9 The figure is a schematic diagram of the structure of a backplane in a display substrate provided in an embodiment of the present application. The backplane 11 is in the shape of a sector ring, and at least one corner of the backplane 11 is chamfered. The chamfered edge C3 of the chamfer is either a straight line or a curved edge. The chamfers can also reduce the protrusion of the corners of the display substrate 10, thereby reducing the risk of interference at the corners of the display substrate 10.

[0191] It should be noted that Figure 9 The chamfer between the first straight edge C11 and the first curved edge C21 is used as an example, but the embodiments of the present application are not limited thereto. Each corner of the back plate 11 can be chamfered to further reduce the risk of interference. Optionally, a chamfer is provided between the first curved edge C21 and the first straight edge C11, and / or a chamfer is provided between the first curved edge C21 and the second straight edge C12. In other words, providing a chamfer on at least one of the two corners on the side closer to the shorter first curved edge C21 can reduce manufacturing difficulty compared to the other two corners.

[0192] in addition, Figure 9 The example in which the chamfered edge C3 is a straight edge is shown, but the present invention is not limited thereto. When the chamfered edge C3 is a curved edge, the chamfered edge C3 protrudes outward from the back plate 11, thereby reducing the protrusion of the corner.

[0193] Alternatively, refer to Figure 10 , Figure 10 yes Figure 9A partial enlarged view of the backplane at position Q3 is provided. The chamfer between the first straight edge C11 and the first curved edge C21 is the first chamfer. The intersection of the chamfered edge C3 of the first chamfer and the first straight edge C11 is a first intersection E1. The intersection of the extended line of the first curved edge C21 and the extended line of the first straight edge C11 is a second intersection E2. The intersection of the chamfered edge C3 of the first chamfer and the first curved edge C21 is a third intersection E3.

[0194] The first distance B1 between the second intersection E2 and the first intersection E1 is smaller than the second distance B2 between the second intersection E2 and the third intersection E3. For the display substrate 10 provided in the first exemplary embodiment, the second distance B2 needs to be set larger to ensure that the risk of interference in the second direction Y2 can be reduced. Therefore, setting the first distance B1 smaller than the second distance B2 can reduce the difficulty of trimming and avoid the problem of obvious seams caused by setting the second distance B2 too large.

[0195] Optionally, the ratio of the second distance B2 to the first distance B1 is within a range of 5 to 15. By setting the ratio of the second distance B2 to the first distance B1 within this range, the corner between the first straight edge C11 and the first curved edge C21 can be effectively retracted in the second direction Y2, thereby reducing the risk of interference.

[0196] In addition, in the embodiment of the present application, the chamfer edge C3 of the first chamfer can be set to be tangent to the first curved edge C21, so that the position of setting the chamfer can be quickly confirmed.

[0197] Optionally, the chamfer between the first straight edge C11 and the first curved edge C21 is a first chamfer. The intersection of the chamfer edge C3 of the first chamfer and the first straight edge C11 is a first intersection E1, and the intersection of the extension line of the first curved edge C21 and the extension line of the first straight edge C11 is a second intersection E2.

[0198] The chamfered edge C3 of the first chamfer satisfies:

[0199] B1≤0.8*P s ;

[0200] Wherein, B1 is the distance between the first intersection point E1 and the second intersection point E2. s is the minimum value of the row spacing between any two adjacent rows of light emitting units 12. Here, the row spacing may be: the distance between the centers of two light emitting units 12 disposed opposite to each other in the second direction Y2 in two adjacent rows of light emitting units 12.

[0201] The above formula determines the range of the first chamfer using the row spacing between two adjacent rows of light-emitting units. Setting the first distance B1 within this range facilitates assembly of the display substrate 10 in a spherically extended display screen. Furthermore, it avoids the problem of some light-emitting units 12 lacking space within the region where the first chamfer is located, thereby minimizing the impact of the first chamfer on the arrangement of the light-emitting units 12. Furthermore, based on the range of the first distance B1 and the ratio of the second distance B2 to the first distance B1, the range of the second distance B2 can also be quickly determined.

[0202] In an embodiment of the present application, the above two methods of shaping the display substrate 10 can be combined for application, that is, while setting chamfers on the corners of the back panel 11, the curvatures of the first curved edge C21 and the second curved edge C22 can be adjusted. Among them, the formula for the curvature K1 is applicable to the positions of the first curved edge C21 except the chamfers, and the formula for the curvature K2 is applicable to the positions of the second curved edge C22 except the chamfers. Correspondingly, the relative size relationship of the first correction coefficient λ1 in different display substrates 10 is applicable to the positions of the first curved edge C21 except the chamfers, and the relative size relationship of the second correction coefficient λ2 in different display substrates 10 is applicable to the positions of the second curved edge C22 except the chamfers.

[0203] The following describes the arrangement of the light-emitting units in the display substrate provided by the first exemplary embodiment:

[0204] Alternatively, refer to Figure 7 The plurality of light-emitting units 12 are arranged in multiple rows along the second direction Y2. At least some rows of light-emitting units 12 correspond to multiple first reference lines G1. The centers of the plurality of light-emitting units 12 in the same row of light-emitting units 12 are all located on a corresponding first reference line G1. The two endpoints of the first reference line G1 are respectively on the first straight edge C11 and the second straight edge C12. The first reference line G1 is an arc, and the center of the first reference line G1 is the intersection of the extension line of the first straight edge C11 and the extension line of the second straight edge C12. In other words, the arrangement direction of the light-emitting units 12 in a row is the extension direction of the corresponding first reference line G1.

[0205] Because the first reference lines G1 corresponding to different rows of light-emitting units 12 extend at different lengths, the number of light-emitting units 12 in different rows also varies. This reduces the difference in distance between the centers of any two adjacent light-emitting units 12 in different rows. For example, the number of light-emitting units 12 in each row gradually increases along the direction from the first curved edge C21 to the second curved edge C22.

[0206] Optionally, the row spacing between any two rows of light-emitting units 12 is equal, and / or the distance between the centers of any two adjacent light-emitting units 12 in the same row of light-emitting units 12 is equal. This allows the light-emitting units 12 to be evenly arranged in the second direction Y2 and / or the first direction Y1, resulting in a better display effect. Here, the embodiment of the present application does not require that the arrangement direction of the multiple light-emitting units 12 be strictly parallel to the first direction Y1 and the second direction Y2, but rather that they be roughly similar.

[0207] Alternatively, refer to Figure 7 and Figure 11 , Figure 11 yes Figure 7 A partial enlarged view of the display substrate at Q2 is provided. Multiple rows of light-emitting units 12 meet the following requirements:

[0208] D1=λ3*0.5*P v ;

[0209] Wherein, D1 is the minimum distance between the first reference line G1 corresponding to the row of light emitting units 12 closest to the first curved edge C21 and the first curved edge C21. λ3 is the third correction coefficient, and the value range of λ3 is: 0.7~1.0. v is the row spacing between two adjacent rows of light emitting units 12. Exemplarily, the first reference line G1 corresponding to the row of light emitting units 12 closest to the first curved edge C21 is G11.

[0210] Based on the value range of the third correction coefficient λ3, it can be seen that by setting the third correction coefficient λ3 to be less than or equal to 1, it can adapt to the situation where there is no seam. Alternatively, if a seam exists, the distance D1 can be reduced, thereby compensating for any seam that may exist between adjacent display substrates 10 in the display screen in the second direction Y2, thereby improving the stitching effect of multiple display substrates 10 in the display screen. Furthermore, by setting λ3 to be greater than or equal to 0.7, the distance between the row of light-emitting units 12 closest to the first curved edge C21 and the first curved edge C21 is ensured to be not too close, thereby avoiding insufficient space for the light-emitting units 12 and the corresponding circuit structures.

[0211] Optionally, if dark seams are likely to appear between the display substrates 10 , the third correction coefficient λ3 needs to be set to a smaller value. For example, the value range of λ3 may be 0.7 to 0.8, so that the splicing effect can be improved by adjusting the degree of reducing the distance D1 .

[0212] In the embodiment of the present application, the row spacing P between two adjacent rows of light emitting units 12 is v According to the target spacing P b Determine the target spacing P bIt can be a pre-specified distance between two adjacent light emitting units 12 in the first direction Y1 or the second direction Y2, and the row spacing P v satisfy:

[0213] P v =L 1 / [L1 / P b ];

[0214] Wherein, L1 is the extension length of the first straight line side C11. Since it cannot be ensured that the extension length L1 of the first straight line side C11 is the target spacing P b In the above formula, the extension length L1 of the first straight line side C11 and the target spacing P are calculated. b The ratio of is rounded to determine the number of rows of the light emitting unit 12, so that the row spacing P is determined. v Here, the rounding method may include: rounding up, rounding down, and rounding off.

[0215] Optionally, a line connecting the center of the light emitting unit 12 and the center O1 of the first reference line G1 is a second reference line G2 corresponding to the light emitting unit 12 .

[0216] Any row of light-emitting units 12 satisfies:

[0217] A n =λ4*0.5*P A_n ;

[0218] Among them, A n is the angle between the second reference line G2 corresponding to the light emitting unit 12 closest to the first straight edge C11 in the nth row of light emitting units 12 and the first straight edge C11. λ4 is the fourth correction coefficient, and the value range of λ4 is: 0.7~1.0. A_n is the included angle between the second reference lines G2 corresponding to two adjacent light emitting units 12 in the n-th row of light emitting units 12 .

[0219] Based on the value range of the fourth correction coefficient λ4, it can be seen that the angle A can be reduced by setting the fourth correction coefficient λ4. n , thereby compensating for possible splicing seams between adjacent display substrates 10 in the display screen in the first direction Y1, thereby improving the splicing effect of multiple display substrates 10 in the display screen.

[0220] In the embodiment of the present application, the angle P between the second reference lines G2 corresponding to two adjacent light emitting units 12 is A_n According to the target spacing P b Determine the target spacing P bIt can be a pre-specified distance between two adjacent light emitting units 12 in the first direction Y1 or the second direction Y2, and the angle P A_n satisfy:

[0221] P A_n =α / [DL n / P b ];

[0222] Among them, DL n is the length of the first reference line G1 corresponding to the light emitting unit 12 in the nth row. Since the length DL cannot be guaranteed n is the target spacing P b Integer multiples of the length DL n Distance from target P b The ratio of is rounded to determine the number of light emitting units 12 in the nth row of light emitting units 12. The angle P is determined in this way. A_n Here, the rounding method may include: rounding up, rounding down, and rounding off.

[0223] It should be noted that, since the length DL of the first reference line G1 corresponding to each row of light emitting units 12 is n are all different, so the number of light emitting units 12 and the angle P in each row of light emitting units 12 are different. A_n They are different.

[0224] In addition, since a row of light emitting units 12 is arranged along the extension direction of the arc, the angle A n and the angle P A_n The accuracy of determining the position of the light emitting unit 12 is high, and the light emitting units 12 in the same row can be arranged evenly. Since the radius of the arc segment between the centers of two adjacent light emitting units 12 in a row of light emitting units 12 is the same, the angle A is n Angle P A_n The relative size relationship can also be converted into the angle A n The length of the corresponding arc segment and the angle P A_n The relative size relationship of the lengths of the corresponding arc segments. Furthermore, the lengths of the arc segments can also be approximated as straight-line distances for ease of calculation.

[0225] Optionally, two sides of the light-emitting units 12 that are arranged in the first direction Y1 are parallel to the second reference line G2 corresponding to the light-emitting units 12. Here, because a row of light-emitting units 12 is arranged along the extension direction of the arc, the arrangement direction of the two sides of the light-emitting units 12 that are arranged in the opposite direction has deviated from the first direction Y1. By setting these two sides parallel to the second reference line G2 corresponding to the light-emitting units 12, when the display substrate 10 is mounted on a display screen extending in the form of a spherical or ellipsoidal surface, the human eye can directly view the multiple light-emitting units 12 in the display substrate 10, reducing the problem of twisting of the light-emitting units 12 affecting display uniformity.

[0226] Alternatively, refer to Figure 12 and Figure 13 , Figure 12 yes Figure 9 Another partial enlarged picture of the backplane at Q3 is provided. Figure 13 yes Figure 9 Another enlarged partial view of the back panel at position Q3 is provided. Back panel 11 has a main display area 111 and a first chamfered display area 112. First chamfered display area 112 is closer to the first chamfer than main display area 111. For example, main display area 111 may be an area outside first chamfered display area 112. If chamfers are also provided at other corners, main display area 111 should exclude areas where other chamfers are located.

[0227] In the second direction Y2 , a distance F2 between the centers of two adjacent light emitting units 12 distributed in the first chamfered display area 112 is less than or equal to a distance F1 between the centers of two adjacent light emitting units 12 distributed in the main display area 111 .

[0228] Among them, please refer to Figure 12 In the case of a minor modification to the display substrate 10, for example, when the first distance B1 is small, the first chamfer has little effect on the arrangement of the light-emitting units 12, and only the back plate 11 can be modified, while the arrangement positions of the light-emitting units 12 in the first chamfered display area 112 remain unchanged, that is, the distance F1 is set equal to the distance F2. For example, when B1≤0.2*P s In this case, set distance F1 equal to distance F2.

[0229] Please refer to Figure 13 In the case of a large modification to the display substrate 10, for example, when the first distance B1 is large, the first chamfer has a greater impact on the arrangement of the light-emitting units 12. The back plate 11 can be modified and the arrangement position of the light-emitting units 12 in the first chamfer display area 112 can be adjusted, that is, the distance F2 is set to be smaller than the distance F1. For example, at 0.2*P s ≤B1≤0.8*P sIn this case, the distance F2 is set to be smaller than the distance F1.

[0230] In the embodiment of the present application, the number of rows of the light emitting units 12 in the first chamfered display area 112 that needs to be adjusted can be further determined based on the value range of the first distance B1. s ≤B1≤0.3*P s In the case of 0.3*P, the row spacing of the light emitting units 12 in the first chamfered display area 112, which is closest to the chamfered edge C3 of the first chamfer, can be reduced. s ≤B1≤0.5*P s In the case of 0.5*P, the row spacing of the light emitting units 12 in the first chamfered display area 112, which is closest to the chamfered edge C3 of the first chamfer, can be reduced. s ≤B1≤0.8*P s In this case, the row spacing between the 4th to 7th rows of light emitting units 12 closest to the chamfered edge C3 of the first chamfer in the first chamfered display area 112 can be reduced.

[0231] Alternatively, refer to Figure 9 and Figure 13 In the first chamfered display area 112, for any row of light-emitting units 12 arranged in the second direction Y2, the distance between the centers of two adjacent light-emitting units 12 in the row gradually increases along the direction from the first curved edge C21 to the second curved edge C22. For example, for the row of light-emitting units 12 closest to the first straight edge C11, the distance F2 is less than the distance F3. In this way, the row spacing of the light-emitting units 12 in the first chamfered display area 112 can achieve a gradual effect in the second direction Y2, thereby achieving a more natural transition between the display effects in the first chamfered display area 112 and the main display area 111.

[0232] And / or, the multiple light-emitting units 12 in the first chamfered display area 112 are divided into multiple first light-emitting unit groups 12a, each first light-emitting unit group 12a includes two adjacent light-emitting units 12 arranged in the second direction Y2. For any row of first light-emitting unit groups 12a arranged in the first direction Y1, the distance between the centers of two adjacent light-emitting units 12 in each first light-emitting unit group 12a gradually increases along the direction from the first straight line edge C11 to the second straight line edge C12. For example, for the row of first light-emitting unit groups 12a closest to the first curved edge C21, the distance F2 is less than the distance F4, and the distance F4 is less than the distance F5. In this way, in the first direction Y1, the row spacing of the light-emitting units 12 in the first chamfered display area 112 can achieve a gradual effect, thereby making the display effect transition between the first chamfered display area 112 and the main display area 111 more natural.

[0233] In summary, embodiments of the present application provide a display substrate. In this embodiment, the first side of the backplane is a straight side, and the second side is a curved side. This ensures that the display substrate can be flattened for ease of production. At least a portion of the first curved side and the second curved side are arc-shaped sides, the first curved side extends less than the second curved side, and both the first curved side and the second curved side protrude in the same direction. This allows the shape of the display substrate to more closely conform to the geometric characteristics of a sphere, thereby reducing seams during assembly of the display substrate and improving the visual quality of a display screen equipped with the display substrate.

[0234] In the second exemplary embodiment, please refer to Figure 14 , Figure 14 This is a schematic diagram of another display substrate partition structure provided by an embodiment of the present application. The partitioning method may include:

[0235] (1) Vertically divide the spherical surface A along the meridian direction. Vertical division refers to dividing the spherical surface A through multiple meridian planes to obtain multiple petal planes A2. The multiple meridian planes used for vertical division can be set at equal angles. Here, Figure 14 The spherical surface A shown may be a standard spherical surface.

[0236] (2) Transversely divide the plurality of petal surfaces A2 along the latitude direction. Transversely divide the spherical surface A by a plurality of planes parallel to the equatorial plane. The plurality of planes parallel to the equatorial plane used for transversely divide the spherical surface A may be arranged at equal distances. The intersection of the planes used for transversely divide the spherical surface A and the spherical surface A is a straight line.

[0237] (3) After horizontal and vertical cutting, the spherical surface A can be divided into a plurality of structural units A3, and the structural units A3 can be flattened along the warp direction. In the flattened state, the two opposite sides of the structural units A3 in the warp direction are straight lines, and the two opposite sides in the weft direction are curved lines. Thus, the shape structure of the display substrate can be determined based on the structural units A3. Here, the display substrate can be a flat surface during manufacturing, and can be a curved surface when assembled into a display screen.

[0238] The display substrate obtained by the second division method in the embodiment of the present application can be referred to Figure 15 , Figure 15It is a structural schematic diagram of another display substrate provided in an embodiment of the present application. The structural features of the display substrate 10 obtained by the second division method mentioned in the embodiment of the present application are all features of the display substrate 10 in a flattened state. The display substrate 10 includes: a back panel 11, and a plurality of light-emitting units 12 located on one side of the back panel 11. The back panel 11 has: a pair of first edges C1 arranged opposite to each other in the first direction Y1, and a pair of second edges C2 arranged opposite to each other in the second direction Y2. The first edge C1 is a curved edge, and the second edge C2 is a straight edge. The pair of first edges C1 are respectively a third curved edge C13 and a fourth curved edge C14, and the pair of second edges C2 are respectively a third straight edge C23 and a fourth straight edge C24.

[0239] The third straight side C23 is parallel to the fourth straight side C24, and the extension length of the third straight side C23 is less than the extension length of the fourth straight side C24. The third curved side C13 and the fourth curved side C14 both protrude away from the center of the back plate 11.

[0240] For the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the second side C2 in the row of light-emitting units 12 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, for the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the second side C2 in the row of light-emitting units 12 on the back panel 11 and the second side C2 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of first sides C1 is 2, and therefore the number of light-emitting units 12 in the row closest to the first side C1 can be 2, and the above condition can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0241] And / or, for the row of light-emitting units 12 closest to the second side C2, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the first side C1 in the row of light-emitting units 12 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, for the row of light-emitting units 12 closest to the second side C2, in the arrangement direction of the row of light-emitting units 12, the distance between the center of the orthographic projection of the light-emitting unit 12 closest to the first side C1 in the row of light-emitting units 12 on the back panel 11 and the first side C1 is less than or equal to half the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It will be understood that the number of second sides C2 is two, and therefore the number of light-emitting units 12 in the row closest to the second side C2 can be two, and the above condition can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0242] Further, in some embodiments, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the second side C2 on the back panel 11 and the second side C2 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first straight side C11 on the back panel 11 and the second side C2 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It can be understood that the number of second sides C2 is 2, such as the third straight side C23 and the fourth straight side C24, so the number of light-emitting units 12 in the row closest to the second side C2 can be 2, and the above situation can be met for each light-emitting unit 12 in the row closest to the second side C2. A specific embodiment is as follows: Figure 15 shown.

[0243] And / or, in some embodiments, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. For example, the distance between the center of the orthographic projection of the row of light-emitting units 12 closest to the first side C1 on the back panel 11 and the first side C1 is less than or equal to half of the distance between the centers of two adjacent light-emitting units 12 in the row of light-emitting units 12. It can be understood that the number of first sides C1 is 2, such as the third curved side C13 and the fourth curved side C14, so the number of light-emitting units 12 in the row closest to the first side C1 can be 2, and the above situation can be met for each light-emitting unit 12 in the row closest to the first side C1. A specific embodiment is as follows. Figure 15 shown.

[0244] It should be noted that the third curved side C13 and the fourth curved side C14 are not conic sections and do not have fixed analytical expressions. Therefore, in order to determine the external dimensions of the third curved side C13 and the fourth curved side C14, the embodiment of the present application can use approximate curve fitting, that is, the third curved side C13 and the fourth curved side C14 are discretized to obtain a series of discrete points, and curve fitting is performed through the positions of these discrete points to determine the external dimensions of the third curved side C13 and the fourth curved side C14.

[0245] For display substrates 10 mounted closer to the south or north pole of the display screen, the extension length of the third linear edge C23 gradually decreases until the third linear edge C23 is reduced to a single point and coincides with the south or north pole. Therefore, the display substrate mounted at the south or north pole can be in the shape of a curved triangle. Alternatively, the display substrate mounted at the south or north pole can be in the shape of a polygon. In other words, the display substrate mounted at the south or north pole is not vertically split, which improves the splicing effect at the south or north pole.

[0246] In summary, the embodiments of the present application provide a display substrate. In this embodiment, the first side of the backplane is a curved side, and the second side is a straight side. This ensures that the display substrate can be flattened for ease of production. The third straight side is parallel to the fourth straight side, and both the third and fourth curved sides protrude away from the center of the backplane. This allows the shape of the display substrate to more closely conform to the geometric characteristics of a sphere, thereby reducing seams during assembly of the display substrate and improving the visual quality of a display screen equipped with the display substrate.

[0247] Optionally, the third curved edge C13 and the fourth curved edge C14 are symmetrically arranged along the center line C5 of the display substrate 10, and the midpoints of the third straight edge C23 and the fourth straight edge C24 are both located on the center line C5 of the display substrate 10. In this way, the shape of the display substrate 10 is more regular, which is convenient for manufacturing.

[0248] In this embodiment of the present application, the midpoint of the fourth straight edge C24 can be used as the origin to establish a coordinate system, and the first direction Y1 and the second direction Y2 can be used as the directions of the two axes of the coordinate system. This allows the coordinates of multiple discrete points on the third curved edge C13 and the fourth curved edge C14 to be quickly determined. Curve fitting can be performed using the coordinates of these discrete points to determine the external dimensions of the third curved edge C13 and the fourth curved edge C14. Furthermore, the greater the number of discrete points, the better the fitting effect. For example, the present application can obtain the coordinates of 50 discrete points.

[0249] The following describes the dimensions of the display substrate provided by the second exemplary embodiment:

[0250] Alternatively, refer to Figure 15and Figure 16 , Figure 16 yes Figure 14 A schematic diagram of the structure of a display substrate assembled within a display screen is provided. After the display substrate 10 is assembled within the spherically extending display screen 20, the plane enclosed by the third straight edge C23 and the center O2 of the display screen 20 is the third plane, the plane enclosed by the fourth straight edge C24 and the center O2 of the display screen 20 is the fourth plane, and the plane enclosed by any designated line segment C4 in the display substrate 10 parallel to the third straight edge C23 and the center O2 of the display screen 20 is the fifth plane. The two endpoints of the designated line segment C4 are on the third curved edge C13 and the fourth curved edge C14, respectively. The meridian plane corresponding to the meridian line in the display screen 20 coinciding with the third curved edge C13 is the third meridian plane, and the meridian plane corresponding to the meridian line in the display screen 20 coinciding with the fourth curved edge C14 is the fourth meridian plane. The first direction Y1 is parallel to the equatorial plane of the display screen 20, the second direction Y2 is parallel to the meridian plane of the display screen 20, and the third direction Y3 is parallel to the equatorial plane and perpendicular to the first direction Y1. The equatorial plane is the plane where the dividing line between the upper hemisphere and the lower hemisphere is located, and the meridian plane is the plane where the longitude is located.

[0251] The display substrate 10 satisfies:

[0252] L5=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 );

[0253] L6=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 );

[0254] M1=R1*(γ3-γ4) / 180°*π;

[0255] L x =R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ x )) 2 );

[0256] Wherein, L5 is the extended length of the third straight edge C23. R1 is the radius of the display screen 20. β is the angle between the third meridian plane and the fourth meridian plane. γ3 is the angle between the third plane and the equatorial plane of the display screen 20. L6 is the extended length of the fourth straight edge C24. γ4 is the angle between the fourth plane and the equatorial plane of the display screen 20. M1 is the length of the center line C5 of the display substrate 10. L x is the extension length of the specified line segment C4. x is the angle between the fifth plane and the equatorial plane of the display screen.

[0257] It should be noted that the extension length L5 of the third straight edge C23, the extension length L6 of the fourth straight edge C24, the length M1 of the center line C5 and the extension length L x All of them are the external structural features of the display substrate 10 in the flat state, angle γ3, angle γ4, angle γ x The angle β and the angle β are parameters determined according to the position of the display substrate 10 in the assembled state. Specifically, the display substrate 10 in the assembled state may be in a curved state.

[0258] Based on the radius R1 of the display screen 20 and the size range of the display substrate 10 in the first direction Y1, the number of display substrates 10 required to be divided into each annular surface can be determined, thereby determining the angle β. For example, when the number of display substrates 10 that can be divided into annular surfaces near the equator is set to 192, β = 360° / 192 = 1.875°.

[0259] Based on the radius R1 of the display screen 20 and the size range of the display substrate 10 in the second direction Y2, the number of annular surfaces that need to be divided in the sphere can be determined, thereby determining the angles γ3, γ4 and γ x .

[0260] The above formula can be used to calculate the size of the third straight side C23 and the fourth straight side C24 of the back plate 11 in the display substrate 10, the length M1 of the center line C5 of the display substrate 10, and the length L of any specified line segment C4. x The length M1 of the center line C5 can reflect the size of the display substrate 10 in the second direction Y2, that is, it defines the range of the specified line segment C4 in the second direction Y2. x , the positions of the two endpoints of the specified line segment C4 in the coordinate system can be determined. By determining the positions of the two endpoints of multiple specified line segments C4 in the coordinate system, the external dimensions of the third curved edge C13 and the fourth curved edge C14 can be determined, and the length L of the specified line segment C4 can be calculated. x The more data there is, the more accurate the determined dimensions of the display substrate 10 can be, so that the display substrate 10 can be manufactured according to the calculated dimensions.

[0261] Under the influence of poor manufacturing precision of the display substrate 10 and assembly position deviation, the corners of the display substrate 10 may easily interfere with adjacent display substrates 10 during assembly. Therefore, the embodiment of the present application can modify the display substrate 10 to reduce the risk of interference.

[0262] In a possible implementation, the embodiment of the present application may adjust the shapes of the third curved edge C13 and the fourth curved edge C14 of the back plate 11 .

[0263] Alternatively, refer to Figure 15 and Figure 16 , the display substrate 10 satisfies:

[0264] L x =λ x *(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ x )) 2 ));

[0265] Among them, L x is the extension length of the specified line segment C4. x is the fifth correction coefficient of the specified line segment C4, λ x The value range of is: 0.95~1. R1 is the radius of the display screen. β is the angle between the third meridian plane and the fourth meridian plane. γ x is the angle between the fifth plane and the equatorial plane of the display screen.

[0266] The extension length L of any specified line segment C4 in the display substrate 10 can be calculated by the above formula: x Based on the fifth correction coefficient λ x The value range of the fifth correction coefficient λ is known. x Less than or equal to 1, it can be adapted to the situation where there is no interference risk, or, if there is an interference risk, the length L of the specified line segment C4 can be reduced. x , so that the third curved side C13 and the fourth curved side C14 can be retracted toward the center line C5. x Greater than or equal to 0.95 can ensure that the designated line segment C4 is not reduced too much, so as to avoid obvious seams when the display substrate 10 is assembled in the display screen. x With the adjustment, the risk of interference at the corners of the display substrate 10 can be reduced.

[0267] In the established coordinate system, the third straight edge C23 and the fourth straight edge C24 can also be regarded as the designated line segment C4, so the following calculation formula can be used for calculation:

[0268] L5=λ8*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 ));

[0269] L6=λ x2*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 ));

[0270] Wherein, L5 is the extension length of the third straight side C23, L6 is the extension length of the fourth straight side C24, λ8 is the eighth correction coefficient of the third straight side C23, λ9 is the ninth correction coefficient of the fourth straight side C24, γ3 is the angle between the third plane and the equatorial plane of the display screen, and γ4 is the angle between the fourth plane and the equatorial plane of the display screen.

[0271] The value range of λ8 and λ9 may also be 0.95 to 1. When the eighth correction coefficient λ8 and the ninth correction coefficient λ9 are within this range, the risk of interference at the corners of the display substrate 10 can be reduced, and obvious seams can be avoided when the display substrate 10 is assembled in a display screen.

[0272] It should be noted that when there is an interference risk, setting λ x is greater than or equal to 0.95 and less than 1, so as to achieve the modification of the display substrate 10. When the manufacturing accuracy and assembly accuracy of the display substrate 10 meet the requirements and the display substrate 10 is not prone to interference, the fifth correction coefficient λ is x Alternatively, it can be set to 1, that is, the shapes of the third curved edge C13 and the fourth curved edge C14 do not need to be adjusted. The setting of the value range of the eighth correction coefficient λ8 and the ninth correction coefficient λ9 can refer to the setting of the value range of the fifth correction coefficient λ x The setting of the value range of is not described in detail here.

[0273] Optionally, for two display substrates 10 adjacent to each other in the meridian direction of the display screen 20, the fifth correction coefficient λ corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 is x , which is greater than the fifth correction coefficient λ corresponding to the display substrate 10 that is further away from the equatorial plane of the display screen 10 x . For example, the value range of the first correction coefficient λ1 corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 can be: 0.99 ~ 1.0, and the value range of the first correction coefficient λ1 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10 can be: 0.95 ~ 0.98. This is more in line with the geometric characteristics of the sphere, thereby improving the splicing effect of the display substrate 10. Similarly, the eighth correction coefficient λ8 and the ninth correction coefficient λ9 can also be combined with the fifth correction coefficient λ x It has the same trend and will not be elaborated here.

[0274] In another possible implementation, the embodiment of the present application may provide chamfers on the corners of the back plate 11 .

[0275] Please refer to Figure 17 , Figure 17 This is a schematic diagram of the structure of another backplane in a display substrate provided by an embodiment of the present application. The backplane 11 is shaped like a curved trapezoid, with at least one corner of the backplane 11 being chamfered, with the chamfered edge being either a straight line or a curved line. The chamfered edge also reduces the protrusion of the corners of the display substrate 10 in the first direction Y1, thereby reducing the risk of interference at the corners of the display substrate 10.

[0276] It should be noted that Figure 17 The chamfer between the third straight edge C23 and the third curved edge C13 is used as an example, but the present invention is not limited thereto. Each corner of the back plate 11 can be chamfered to further reduce the risk of interference.

[0277] Optionally, a chamfer is provided between the third straight edge C23 and the third curved edge C13, and / or a chamfer is provided between the third straight edge C23 and the fourth curved edge C14. In other words, providing a chamfer on at least one of the two corners on the side closer to the shorter third straight edge C23 can reduce manufacturing difficulty compared to the other two corners.

[0278] in addition, Figure 17 The example in which the chamfered edge C3 is a straight edge is shown, but the present invention is not limited thereto. When the chamfered edge C3 is a curved edge, the chamfered edge C3 protrudes outward from the back plate 11, thereby reducing the protrusion of the corner.

[0279] Alternatively, refer to Figure 18 , Figure 18 yes Figure 17 A partial enlarged view of the backplane at position Q5 is provided. The chamfer between the third straight edge C23 and the third curved edge C13 is the second chamfer. The intersection of the chamfered edge C3 of the second chamfer and the third curved edge C13 is a fourth intersection E4. The intersection of the extended line of the third straight edge C23 and the extended line of the third curved edge C13 is a fifth intersection E5. The intersection of the chamfered edge C3 of the second chamfer and the third straight edge C23 is a sixth intersection E6.

[0280] The third distance B3 between the fifth intersection E5 and the fourth intersection E4 is greater than the fourth distance B4 between the fifth intersection E5 and the sixth intersection E6. For the display substrate 10 provided in the first exemplary embodiment, the second distance B2 needs to be set larger to ensure that the risk of interference in the first direction Y1 can be reduced. Therefore, setting the third distance B3 larger than the fourth distance B4 can reduce the difficulty of trimming and avoid the problem of obvious seams caused by setting the fourth distance B4 too large.

[0281] Optionally, the ratio of the third distance B3 to the fourth distance B4 is within a range of 5 to 15. By setting the ratio of the third distance B3 to the fourth distance B4 within this range, the corner between the third straight edge C23 and the third curved edge C13 can be effectively retracted in the first direction Y1, thereby reducing the risk of interference.

[0282] Optionally, the chamfer between the third straight edge C23 and the third curved edge C13 is a second chamfer. The intersection of the chamfered edge C3 of the second chamfer and the third curved edge C13 is a fourth intersection E4, and the intersection of the extension line of the third straight edge C23 and the extension line of the third curved edge C13 is a fifth intersection E5.

[0283] The chamfered edge C3 of the second chamfer satisfies:

[0284] B4≤0.8*P s ;

[0285] Wherein, B4 is the distance between the fifth intersection point E5 and the sixth intersection point E6. s is the minimum value of the row spacing between any two adjacent rows of light emitting units 12.

[0286] The above formula determines the range of the second chamfer by using the row spacing between two adjacent rows of light-emitting units. Setting the fourth distance B4 within this range facilitates assembly of the display substrate 10 in a spherically extended display screen. Furthermore, it avoids the problem of some light-emitting units 12 lacking space within the area where the second chamfer is located, thereby minimizing the impact of the second chamfer on the arrangement of the light-emitting units 12. Furthermore, based on the range of the fourth distance B4 and the ratio of the third distance B3 to the fourth distance B4, the range of the third distance B3 can also be quickly determined.

[0287] In the embodiment of the present application, the above two methods of modifying the display substrate 10 can be combined, that is, the shapes of the third curved edge C13 and the fourth curved edge C14 of the back plate 11 can be adjusted while the corners of the back plate 11 are chamfered. x The formula is applicable to areas other than chamfers. Correspondingly, the fifth correction coefficient λ x The relative size relationships among different display substrates 10 apply to areas other than chamfers.

[0288] The following describes the arrangement of the light-emitting units in the display substrate provided by the second exemplary embodiment:

[0289] Alternatively, refer to Figure 15The plurality of light-emitting units 12 are arranged in a plurality of rows along the second direction Y2. The plurality of rows of light-emitting units 12 correspond to a plurality of designated line segments C4, respectively. The centers of the plurality of light-emitting units 12 in the same row of light-emitting units 12 are all located on a corresponding designated line segment C4. The two endpoints of the designated line segment C4 are respectively on the third curved edge C13 and the fourth curved edge C14, and the designated line segment C4 is parallel to the third straight edge C23.

[0290] Because the lengths of designated line segments C4 corresponding to different rows of light-emitting units 12 vary, the number of light-emitting units 12 in different rows also varies. This reduces the difference in distance between the centers of any two adjacent light-emitting units 12 in different rows. For example, the number of light-emitting units 12 in each row gradually increases along the direction from the third straight line edge C23 to the fourth straight line edge C24.

[0291] Optionally, the row spacing between any two rows of light-emitting units 12 is equal, and / or the distance between the centers of any two adjacent light-emitting units 12 in the same row of light-emitting units 12 is equal, so that the light-emitting units 12 can be evenly arranged in the second direction Y2 and / or the first direction Y1, and the display effect is better.

[0292] Alternatively, refer to Figure 15 and Figure 19 , Figure 19 yes Figure 15 A partial enlarged view of the display substrate at position Q4 is provided. The third curved edge C13 and the fourth curved edge C14 are symmetrically arranged along the center line of the display substrate 10. The multiple rows of light-emitting units 12 meet the following requirements:

[0293] S1=λ6*0.5*P C ;

[0294] Wherein, S1 is the minimum distance between the designated line segment corresponding to the row of light emitting units 12 closest to the third straight line edge C23 and the third straight line edge C23. λ6 is the sixth correction coefficient, and the value range of λ6 is: 0.5~1.0. C is the row spacing between two adjacent rows of light emitting units 12 .

[0295] Based on the value range of the sixth correction coefficient λ6, it can be seen that by setting the sixth correction coefficient λ6 to be less than or equal to 1, the distance S1 can be reduced, or if a seam exists, thereby compensating for any seam that may exist between adjacent display substrates 10 in the second direction Y2, thereby improving the stitching effect of multiple display substrates 10 in the display screen. By setting λ3 to be greater than or equal to 0.5, the distance between the row of light-emitting units 12 closest to the third linear edge C23 and the third linear edge C23 is ensured to be not too close, thereby avoiding insufficient space for the light-emitting units 12 and the corresponding circuit structures. Furthermore, if dark seams are likely to appear between the display substrates 10, the sixth correction coefficient λ6 may need to be smaller. For example, the value range of λ6 may be 0.5 to 0.8.

[0296] In the embodiment of the present application, the row spacing P between two adjacent rows of light emitting units 12 is C According to the target spacing P b Determine the target spacing P b It can be a pre-specified distance between two adjacent light emitting units 12 in the first direction Y1 or the second direction Y2, and the row spacing P C satisfy:

[0297] P C =M 1 / [M1 / P b ];

[0298] Wherein, M1 is the length of the center line C5 of the display substrate 10. Since it is not possible to ensure that the length M1 of the center line C5 of the display substrate 10 is the target pitch P b In the above formula, the length M1 of the center line C5 of the display substrate 10 and the target spacing P are compared. b The ratio of is rounded to determine the number of rows of the light emitting unit 12, so that the row spacing P is determined. C Here, the rounding method may include: rounding up, rounding down, and rounding off.

[0299] Optionally, any row of light-emitting units 12 satisfies:

[0300] S n =λ7*0.5*P p ;

[0301] Among them, S n is the distance between the center of the light emitting unit 12 closest to the third curved edge C13 in the nth row of light emitting units 12 and the third curved edge C13. λ7 is the seventh correction coefficient, and the value range of λ7 is: 0.5~1.0, P p is the distance between the centers of two adjacent light emitting units 12 in the nth row of light emitting units 12 .

[0302] Based on the value range of the seventh correction coefficient λ7, it can be seen that the distance S can be shortened by setting the seventh correction coefficient λ7. n , thereby compensating for any seams that may exist between adjacent display substrates 10 in the first direction Y1, thereby improving the splicing effect of multiple display substrates 10 in the display. Furthermore, if dark seams are likely to appear between the display substrates 10, the seventh correction coefficient λ7 may need to be set to a smaller value. For example, the value range of λ7 may be 0.5 to 0.8.

[0303] In the embodiment of the present application, the distance P between the centers of two adjacent light emitting units 12 in the nth row of light emitting units 12 is p According to the target spacing P b Determine the target spacing P b The distance P may be a pre-specified distance between two adjacent light emitting units 12 in the first direction Y1 or the second direction Y2. p satisfy:

[0304] P P =L xn / [M1 / P b ];

[0305] Among them, L xn is the extension length of the designated line segment C4 corresponding to the n-th row of light emitting units 12. Since the extension length L of the designated line segment C4 corresponding to the n-th row of light emitting units 12 cannot be guaranteed xn is the target spacing P b Integer multiples of the above formula, the extension length L of the specified line segment C4 is calculated by xn Distance from target P b The ratio of is rounded to determine the number of light emitting units 12 in the nth row of light emitting units 12. The distance P thus determined is p Here, the rounding method may include: rounding up, rounding down, and rounding off.

[0306] It should be noted that, since the extension length L of the designated line segment C4 corresponding to each row of light emitting units 12 is xn are all different, so the number of light emitting units 12 in each row of light emitting units 12 and the distance P between the centers of adjacent light emitting units 12 are different. p They are different.

[0307] Alternatively, refer to Figure 20 and Figure 21 , Figure 20 yes Figure 17 Another partial enlarged picture of the back panel at Q5 is provided. Figure 21 yes Figure 17Another enlarged partial view of the back panel at position Q5 is provided. Back panel 11 has a main display area 111 and a second chamfered display area 113. Second chamfered display area 113 is closer to the second chamfer than main display area 111. For example, main display area 111 may be the area outside of second chamfered display area 113. If chamfers are also provided at other corners, main display area 111 should exclude the areas where the other chamfers are located.

[0308] In the first direction Y1 , a distance F6 between the centers of two adjacent light emitting units 12 distributed in the second chamfered display area 113 is less than or equal to a distance F7 between the centers of two adjacent light emitting units 12 distributed in the main display area 111 .

[0309] Among them, please refer to Figure 20 In the case where the display substrate 10 is modified slightly, for example, when the fourth distance B4 is small, the second chamfer has little effect on the arrangement of the light-emitting units 12, and only the back plate 11 can be modified, and the arrangement position of the light-emitting units 12 in the second chamfer display area 113 remains unchanged, that is, the distance F6 is set equal to the distance F7. For example, when B4≤0.2*P s In this case, set distance F6 equal to distance F7.

[0310] Please refer to Figure 13 In the case of a large modification to the display substrate 10, for example, when the fourth distance B4 is large, the second chamfer has a greater impact on the arrangement of the light-emitting units 12. The back plate 11 can be modified and the arrangement position of the light-emitting units 12 in the second chamfer display area 113 can be adjusted, that is, the distance F6 is set to be smaller than the distance F7. For example, at 0.2*P s ≤B4≤0.8*P s In this case, set the distance F6 to be smaller than the distance F7.

[0311] Alternatively, refer to Figure 17 and Figure 20 In the second chamfered display area 113, for any row of light-emitting units 12 arranged in the first direction Y1, the distance between the centers of two adjacent light-emitting units 12 in the row gradually increases along the direction from the third curved edge C13 to the fourth curved edge C14. For example, for the row of light-emitting units 12 closest to the third straight edge C23, the distance F6 is less than the distance F8. In this way, the spacing of the light-emitting units 12 in the first chamfered display area 112 in the first direction Y1 can achieve a gradual effect, thereby achieving a more natural transition between the display effects in the second chamfered display area 113 and the main display area 111.

[0312] And / or, the multiple light-emitting units 12 in the second chamfered display area 113 are divided into multiple second light-emitting unit groups 12b, each second light-emitting unit group 12b includes two adjacent light-emitting units 12 arranged in the first direction Y1. For any row of first light-emitting unit groups 12b arranged in the second direction, the distance between the centers of two adjacent light-emitting units 12 in each second light-emitting unit group 12b gradually increases along the direction from the third straight line edge C23 to the fourth straight line edge C24. For example, for the row of first light-emitting unit groups 12a closest to the third curved edge C13, the distance F6 is less than the distance F9, and the distance F9 is less than the distance F10. In this way, in the second direction Y2, the spacing between the light-emitting units 12 in the first chamfered display area 112 can achieve a gradual effect, thereby making the display effect transition between the first chamfered display area 112 and the main display area 111 more natural.

[0313] In summary, the embodiments of the present application provide a display substrate. In this embodiment, the first side of the backplane is a curved side, and the second side is a straight side. This ensures that the display substrate can be flattened for ease of production. The third straight side is parallel to the fourth straight side, and both the third and fourth curved sides protrude away from the center of the backplane. This allows the shape of the display substrate to more closely conform to the geometric characteristics of a sphere, thereby reducing seams during assembly of the display substrate and improving the visual quality of a display screen equipped with the display substrate.

[0314] The present application provides a display module comprising a housing and at least one display substrate located on one side of the housing. The display substrate is any of the display substrates provided in the aforementioned embodiments. Because the display module includes the display substrates provided in the aforementioned embodiments, the display module can also achieve similar effects, namely, improving the splicing effect of the display module.

[0315] In this application, a display module housing can be mounted with only one display substrate. The housing's mounting surface can have a similar outer structure to the display substrate housing provided in the aforementioned embodiments, i.e., one pair of opposing edges on the housing's mounting surface are straight, and the other pair of opposing edges are curved. Furthermore, a display module housing can be mounted with multiple display substrates. For example, for a display module mounted at the South Pole or North Pole, the housing can be circular or polygonal, with multiple display substrates mounted on the housing's mounting surface.

[0316] Optionally, at least a portion of a side of the housing facing at least one display substrate is curved. In this case, the backplane of the display substrate has a certain degree of flexibility or toughness. Therefore, when the display substrate is mounted on one side of the housing, the display substrate can be bent to conform to the curved surface of the housing side, thereby providing a display module with a curved display surface.

[0317] An embodiment of the present application provides a display screen, comprising: a plurality of spliced ​​display modules, the display module being the display module provided by any of the above embodiments, and the display surface of the display screen being a curved surface.

[0318] The display screen can be any display screen extending from a spherical or ellipsoidal surface, such as a sports simulator display screen, a flight simulation display screen, or a vehicle driving simulation display screen. Because the display screen includes the display modules provided in the above-described embodiments, the display screen can also achieve similar effects, namely, improving the splicing effect of the display screen. Furthermore, because the display modules in this application can have curved display surfaces, multiple display modules can be spliced ​​together within the display screen to create a spherical, ultra-large display screen.

[0319] Alternatively, the display screen extends into a sphere, with the display surface facing the center of the sphere, allowing the user to view the display from within the sphere. Alternatively, the display surface faces outward from the sphere, allowing the user to view the display from outside the sphere. In both cases, the display screens achieve a better splicing effect, thereby enhancing the visual quality of the display screens.

[0320] The embodiments of the present application provide display substrates in two division modes. Correspondingly, the embodiments of the present application provide display screens formed by splicing the display substrates in these two division modes.

[0321] In a first exemplary embodiment, the first side of each display substrate in the display screen is a straight side, and the second side is a curved side. The first side corresponds to the longitude of the sphere where the display screen is located, and the second side corresponds to the latitude of the sphere where the display screen is located.

[0322] After the display substrate is assembled into the display screen, the plane enclosed by the first curved edge and the center of the display screen is the first plane, and the plane enclosed by the second curved edge and the center of the display screen is the second plane. The meridian plane corresponding to the meridian line of the display screen that coincides with the first straight edge is the first meridian plane, and the meridian plane corresponding to the meridian line of the display screen that coincides with the second straight edge is the second meridian plane. The first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen.

[0323] The curvatures of the first and second curved edges satisfy:

[0324] K1=λ1 / (π*cosγ1*R1*(β / 360°) / β*sin(2γ1));

[0325] K2=λ2 / (π*cosγ2*R1*(β / 360°) / β*sin(2γ2));

[0326] Wherein, K1 is the curvature of the first curved edge of the display substrate in the flattened state. λ1 is the first correction coefficient, and the value range of λ1 is: 1 to 1.05. γ1 is the angle between the first plane and the equatorial plane of the display screen. R1 is the radius of the sphere on which the display screen is located. β is the angle between the first meridian plane and the second meridian plane. K2 is the curvature of the second curved edge of the display substrate in the flattened state. λ2 is the second correction coefficient, and the value range of λ2 is: 0.95 to 1. γ2 is the angle between the second plane and the equatorial plane of the display screen.

[0327] Optionally, two display substrates adjacent to each other in the meridian direction of the display screen are respectively: a first display substrate and a second display substrate, and the first display substrate is closer to the equatorial plane of the display screen than the second display substrate.

[0328] The first correction coefficient corresponding to the curvature of the first curved side in the first display substrate is smaller than the first correction coefficient corresponding to the curvature of the first curved side in the second display substrate.

[0329] The second correction coefficient corresponding to the curvature of the second curved side in the first display substrate is greater than the second correction coefficient corresponding to the curvature of the second curved side in the second display substrate.

[0330] Optionally, the display substrate satisfies the following conditions in a flattened state:

[0331] L1=2π*cosγ1*R1*(β / 360°);

[0332] L2=2π*cosγ2*R1*(β / 360°);

[0333] α=2β*sin(2γ1);

[0334] L3=L4=π*cos(γ2-γ1)*R1*(β / 360°) / β*sin(2γ1);

[0335] Wherein, L1 is the extended length of the first curved edge. γ1 is the angle between the first plane and the equatorial plane of the display screen. R1 is the radius of the display screen. β is the angle between the first meridian plane and the second meridian plane. L2 is the extended length of the second curved edge. γ2 is the angle between the second plane and the equatorial plane of the display screen. α is the angle between the extended line of the first straight edge and the extended line of the second straight edge when the display substrate is flattened. L3 is the extended length of the first straight edge. L4 is the extended length of the second straight edge.

[0336] In a second exemplary embodiment, the second side of each display substrate in the display screen is a straight side, and the first side is a curved side, the first side corresponds to the longitude of the sphere where the display screen is located, and the second side corresponds to the latitude of the sphere where the display screen is located.

[0337] After the display substrate is assembled into the display screen, the plane enclosed by any designated line segment in the display substrate parallel to the third straight edge and the center of the display screen is the fifth plane, with the two endpoints of the designated line segment respectively located on the third curved edge and the fourth curved edge. The meridian plane corresponding to the meridian line in the display screen that coincides with the third curved edge is the third meridian plane, and the meridian plane corresponding to the meridian line in the display screen that coincides with the fourth curved edge is the fourth meridian plane. The first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen.

[0338] Display substrate meets:

[0339] L x =λ x *(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ x )) 2 ));

[0340] Among them, L x is the extension length of the specified line segment. x is the fifth correction coefficient of the specified line segment, λ x The value range of is: 0.95~1. R1 is the radius of the display screen. β is the angle between the third meridian plane and the fourth meridian plane. γ x is the angle between the fifth plane and the equatorial plane of the display screen.

[0341] Optionally, after the display substrate is assembled into the display screen, the plane enclosed by the third straight line side and the center of the display screen is the third plane, and the plane enclosed by the fourth straight line side and the center of the display screen is the fourth plane.

[0342] Display substrate meets:

[0343] L5=λ8*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 ));

[0344] L6=λ9*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 ));

[0345] Wherein, L5 is the extended length of the third straight edge. λ8 is the eighth correction coefficient for the third straight edge, and the value range of λ8 is: 0.95-1. γ3 is the angle between the third plane and the equatorial plane of the display screen. L6 is the extended length of the fourth straight edge. λ9 is the ninth correction coefficient for the fourth straight edge, and the value range of λ9 is: 0.95-1. γ4 is the angle between the fourth plane and the equatorial plane of the display screen.

[0346] Optionally, two display substrates adjacent to each other in the meridian direction of the display screen are respectively a third display substrate and a fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate.

[0347] The third display substrate and the fourth display substrate meet at least one of the following conditions:

[0348] The fifth correction coefficient of the designated line segment in the third display substrate is smaller than the fifth correction coefficient of the designated line segment in the fourth display substrate.

[0349] The eighth correction coefficient of the third straight line side in the third display substrate is smaller than the eighth correction coefficient of the third straight line side in the fourth display substrate.

[0350] The ninth correction coefficient of the fourth straight line side in the third display substrate is smaller than the ninth correction coefficient of the fourth straight line side in the fourth display substrate.

[0351] Optionally, the third curved edge and the fourth curved edge are symmetrically arranged along a center line of the display substrate.

[0352] Display substrate meets:

[0353] L5=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 ).

[0354] L6=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 ).

[0355] M1 = R1*(γ3-γ4) / 180°*π.

[0356] Wherein, L5 is the extended length of the third straight edge. R1 is the radius of the display screen. β is the angle between the third meridian plane and the fourth meridian plane. γ3 is the angle between the third plane and the equatorial plane of the display screen. L6 is the extended length of the fourth straight edge. γ4 is the angle between the fourth plane and the equatorial plane of the display screen.

[0357] In this application, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0358] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0359] In this application, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise expressly limited.

[0360] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display substrate, characterized in that: include: a back panel, and a plurality of light-emitting units located on one side of the back panel; The back plate has: a pair of first sides arranged opposite to each other in a first direction, and a pair of second sides arranged opposite to each other in a second direction; wherein the second side is a straight side, and the first side is a curved side; a pair of the second sides are a third straight side and a fourth straight side, respectively, and a pair of the first sides are a third curved side and a fourth curved side, respectively; The third straight edge is parallel to the fourth straight edge, and an extension length of the third straight edge is less than an extension length of the fourth straight edge; the third curved edge and the fourth curved edge both protrude in a direction away from the center of the back plate.

2. The display substrate according to claim 1, wherein: The third curved edge and the fourth curved edge are symmetrically arranged along the center line of the display substrate, and the midpoint of the third straight edge and the midpoint of the fourth straight edge are both located on the center line of the display substrate.

3. The display substrate according to claim 1 or 2, wherein: The back plate is in the shape of a curved trapezoid, at least one corner of the back plate has a chamfer, and the chamfered edge of the chamfer is a straight edge or a curved edge.

4. The display substrate according to claim 3, wherein: There is a chamfer between the third straight line side and the third curved line side, and / or there is a chamfer between the third straight line side and the fourth curved line side.

5. The display substrate according to claim 3, wherein: The chamfer between the third straight edge and the third curved edge is a second chamfer; the intersection of the chamfered edge of the second chamfer and the third curved edge is a fourth intersection; the intersection of the extended line of the third straight edge and the extended line of the third curved edge is a fifth intersection; and the intersection of the chamfered edge of the second chamfer and the third straight edge is a sixth intersection; The third distance between the fifth intersection point and the fourth intersection point is greater than the fourth distance between the fifth intersection point and the sixth intersection point.

6. The display substrate according to claim 5, wherein: A ratio of the third distance to the fourth distance is in a range of 5 to 15.

7. The display substrate according to claim 3, wherein: The chamfer between the third straight side and the third curved side is a second chamfer; the intersection of an extension line of the third straight side and an extension line of the third curved side is a fifth intersection, and the intersection of the chamfered side of the second chamfer and the third straight side is a sixth intersection; the plurality of light-emitting units are arranged in a plurality of rows along the second direction; The chamfered edge of the second chamfer satisfies: B4≤0.8*P s ; Wherein, B4 is the distance between the fifth intersection and the sixth intersection; s is the minimum value of the row spacing between any two adjacent rows of the light-emitting units.

8. The display substrate according to any one of claims 5 to 7, characterized in that: The back panel has a main display area and a second chamfered display area, wherein the second chamfered display area is closer to the second chamfer than the main display area; In the first direction, a distance between centers of two adjacent light-emitting units distributed in the second chamfered display area is smaller than a distance between centers of two adjacent light-emitting units distributed in the main display area.

9. The display substrate according to claim 8, wherein: In the second chamfered display area, for any row of light-emitting units arranged in the first direction, the distance between the centers of two adjacent light-emitting units in the row of light-emitting units gradually increases along the direction from the third curved edge to the fourth curved edge, and / or, The multiple light-emitting units in the second chamfered display area are divided into multiple second light-emitting unit groups, and one second light-emitting unit group includes two adjacent light-emitting units arranged in the first direction. For any row of first light-emitting unit groups arranged in the second direction, the distance between the centers of two adjacent light-emitting units in each second light-emitting unit group gradually increases along the direction from the third straight line edge to the fourth straight line edge.

10. The display substrate according to any one of claims 1 to 2, 4 to 7, characterized in that: The multiple light-emitting units are arranged into multiple rows along the second direction, and the multiple rows of light-emitting units correspond to multiple designated line segments respectively. The centers of the multiple light-emitting units in the same row are all located on a corresponding designated line segment; the two endpoints of the designated line segment are respectively on the third curved edge and the fourth curved edge, and the designated line segment is parallel to the third straight line edge.

11. The display substrate according to claim 10, wherein: The third curved edge and the fourth curved edge are symmetrically arranged along the center line of the display substrate; The light-emitting units in the plurality of rows satisfy: S1=λ6*0.5*P L ; Wherein, S1 is the minimum distance between the designated line segment corresponding to the row of light-emitting units closest to the third straight line edge and the third straight line edge; λ6 is the sixth correction coefficient, and the value range of λ6 is: 0.5~1.0; P L is the row spacing between two adjacent rows of light-emitting units.

12. The display substrate according to claim 10, wherein: The light-emitting units in any row satisfy: S n =λ7*0.5*P p ; Among them, the S n is the distance between the center of the light emitting unit closest to the third curved edge in the nth row and the third curved edge; λ7 is the seventh correction coefficient, and the value range of λ7 is: 0.5~1.0, the P p is the distance between the centers of two adjacent light-emitting units in the nth row.

13. The display substrate according to any one of claims 1 to 2, 4 to 7, 11 to 12, characterized in that: A plurality of LED chips are encapsulated in one of the light-emitting units, or a light-emitting unit includes a plurality of LED chips that are independently arranged.

14. A display module, characterized in that: include: A box body, and at least one display substrate located on one side of the box body, wherein the display substrate is the display substrate according to any one of claims 1 to 13.

15. A display screen, characterized in that: include: A plurality of spliced ​​display modules, wherein the display module is the display module according to claim 14, and the display surface of the display screen is a curved surface.

16. The display screen according to claim 15, characterized in that The display screen extends in a spherical surface; the first side corresponds to a longitude of the spherical surface where the display screen is located, and the second side corresponds to a latitude of the spherical surface where the display screen is located; After the display substrate is assembled into the display screen, a plane enclosed by any designated line segment in the display substrate that is parallel to the third straight edge and the center of the display screen is a fifth plane, and two endpoints of the designated line segment are respectively on the third curved edge and the fourth curved edge; a meridian plane corresponding to a meridian line in the display screen that coincides with the third curved edge is a third meridian plane, and a meridian plane corresponding to a meridian line in the display screen that coincides with the fourth curved edge is a fourth meridian plane; the first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen; The display substrate satisfies: L x =λ x *(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ) x )) 2 )); Among them, the L x is the extended length of the specified line segment in the flattened state; x is the fifth correction coefficient of the specified line segment, the λ x The value range of is: 0.95~1; R1 is the radius of the sphere where the display screen is located; β is the angle between the third meridian plane and the fourth meridian plane; γ x is the angle between the fifth plane and the equatorial plane of the display screen.

17. The display screen according to claim 16, wherein: The two display substrates adjacent to each other in the meridian direction of the display screen are respectively: a third display substrate and a fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate; The fifth correction coefficient of the designated line segment in the third display substrate is smaller than the fifth correction coefficient of the designated line segment in the fourth display substrate.

18. The display screen according to claim 16, wherein: After the display substrate is assembled into the display screen, the plane enclosed by the third straight line side and the spherical center of the display screen is the third plane, and the plane enclosed by the fourth straight line side and the spherical center of the display screen is the fourth plane; The display substrate satisfies: L5 = λ8 * (R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 )), and / or, L6=λ9*(R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 )); Among them, L5 is the extended length of the third straight edge in a flattened state; λ8 is the eighth correction coefficient of the third straight edge, and the value range of λ8 is: 0.95~1; γ3 is the angle between the third plane and the equatorial plane of the display screen; L6 is the extended length of the fourth straight edge in a flattened state; λ9 is the ninth correction coefficient of the fourth straight edge, and the value range of λ9 is: 0.95~1; γ4 is the angle between the fourth plane and the equatorial plane of the display screen.

19. The display screen according to claim 18, characterized in that The two display substrates adjacent to each other in the meridian direction of the display screen are respectively: a third display substrate and a fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate; The eighth correction coefficient of the third straight line side in the third display substrate is smaller than the eighth correction coefficient of the third straight line side in the fourth display substrate, and / or, The ninth correction coefficient of the fourth straight line side in the third display substrate is smaller than the ninth correction coefficient of the fourth straight line side in the fourth display substrate.

20. The display screen according to claim 15, wherein: The display screen extends in a spherical shape; the first side corresponds to a longitude of the spherical surface where the display screen is located, and the second side corresponds to a latitude of the spherical surface where the display screen is located; the third curved side and the fourth curved side are symmetrically arranged along a center line of the display substrate; After the display substrate is assembled into the display screen, the plane enclosed by the third straight edge and the center of the display screen is the third plane, the plane enclosed by the fourth straight edge and the center of the display screen is the fourth plane, the meridian plane corresponding to the meridian line in the display screen that coincides with the third curved edge is the third meridian plane, and the meridian plane corresponding to the meridian line in the display screen that coincides with the fourth curved edge is the fourth meridian plane; the first direction is parallel to the equatorial plane of the display screen, and the second direction is parallel to the meridian plane of the display screen; The display substrate satisfies: L5=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ3)) 2 ); L6=R1*2*tan(0.5*β)*(1-0.5*(cos(90°-0.5*γ4)) 2 ); M1=R1*(γ3-γ4) / 180°*π; Among them, L5 is the extended length of the third straight edge in a flattened state; R1 is the radius of the display screen; β is the angle between the third meridian plane and the fourth meridian plane; γ3 is the angle between the third plane and the equatorial plane of the display screen; L6 is the extended length of the fourth straight edge in a flattened state; γ4 is the angle between the fourth plane and the equatorial plane of the display screen; and M1 is the length of the center line of the display substrate.

Images