Display Substrate, Display Module and Display Screen

Abstract

The present application discloses a display substrate, a display module, and a display screen, belonging to the field of display technology. The display substrate includes: a backplane, and a plurality of light-emitting units located on one side of the backplane. Among them, by setting one of the first side and the second side of the backplane as a straight side and the other as a curved side, the splicing effect after the display substrate is assembled into the display screen can be improved on the basis of ensuring the production of the display substrate. Moreover, for the row of light-emitting units closest to the first side, by setting the distance between the light-emitting unit closest to the first side and the first side to be less than or equal to the distance between two adjacent light-emitting units, this can be used to compensate for the seams existing between the display substrates, improve the uniformity of the distance between adjacent light-emitting units in the display screen, thereby improving the splicing effect of multiple display substrates in the display screen, and further improving the visual effect of the display screen.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly to a display substrate, a display module, and a display screen. Background Art

[0002] An irregular-shaped display screen is a display screen with an irregular shape. Currently, among irregular-shaped display screens, spherical display screens can be widely applied to multiple fields such as sports simulators and driving simulators, and can achieve a more rich and vivid display effect. A spherical display screen is usually formed by splicing multiple display modules.

[0003] However, the splicing effect of multiple display modules in the above-mentioned spherical display screen is poor, resulting in a poor visual effect of the spherical display screen. Summary of the Invention

[0004] Embodiments of the present application provide a display substrate, a display module, and a display screen. The technical solutions are as follows:

[0005] According to a first aspect of the present application, there is provided a display substrate, including: a backplane, and a plurality of light-emitting units located on one side of the backplane;

[0006] The backplane has: a pair of first sides oppositely arranged in a first direction, and a pair of second sides oppositely arranged in a second direction; one of the first side and the second side is a straight side, and the other is a curved side;

[0007] Wherein, for a row of the light-emitting units closest to the first side, in the arrangement direction of a row of the light-emitting units, the distance between the center of the projection of the light-emitting unit closest to the second side in a row of the light-emitting units on the backplane and the second side is less than or equal to half of the distance between the centers of two adjacent light-emitting units in a row of the light-emitting units, and / or,

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

[0009] Optionally, the first side is a straight side, and the second side is a curved side; the pair of first sides are respectively a first straight side and a second straight side, and the pair of second sides are respectively a first curved side and a second curved side;

[0010] Wherein, the extension line of the first straight side intersects with the extension line of the second straight side; at least part of the first curved side and the second curved side are arc sides, the extension length of the first curved side is less than the extension length of the second curved side, and the centers of the arc sides in the first curved side and the centers of the arc sides in the second curved side are both located on the side of the first curved side away from the second curved side.

[0011] Optionally, the centers of the arc sides in the first curved side and the second curved side are both the intersection point of the extension line of the first straight side and the extension line of the second straight side; the first straight side and the second straight side are symmetrically arranged with respect to the connection line between the center of the first curved side and the center of the backplane.

[0012] Optionally, the shape of the backplane is a sector ring, at least one corner of the backplane has a chamfer, and the chamfer edge of the chamfer is a straight side or a curved side.

[0013] Optionally, there is a chamfer between the first curved side and the first straight side, and / or there is a chamfer between the first curved side and the second straight side.

[0014] Optionally, the chamfer between the first straight side and the first curved side is the first chamfer; the intersection point of the chamfer edge of the first chamfer and the first straight side is the first intersection point, the intersection point of the extension line of the first curved side and the extension line of the first straight side is the second intersection point, and the intersection point of the chamfer edge of the first chamfer and the first curved side is the third intersection point;

[0015] Wherein, the first distance between the second intersection point and the first intersection point is less than the second distance between the second intersection point and the third intersection point.

[0016] Optionally, the ratio of the second distance to the first distance is in the range of 5 to 15.

[0017] Optionally, the chamfer between the first straight side and the first curved side is the first chamfer; the intersection point of the chamfer edge of the first chamfer and the first straight side is the first intersection point, the intersection point of the extension line of the first curved side and the extension line of the first straight side is the second intersection point; the multiple light-emitting units are arranged in multiple rows along the second direction;

[0018] The chamfer edge of the first chamfer satisfies:

[0019] B1≤0.8*P s ;

[0020] Wherein, the B1 is the distance between the first intersection point and the second intersection point; the P sis the minimum value among the row spacings between any two adjacent ones of the light-emitting units.

[0021] Optionally, the backplane has a main display area and a first chamfer display area, and the first chamfer display area is closer to the first chamfer than the main display area;

[0022] In the second direction, the distance between the centers of two adjacent ones of the light-emitting units distributed in the first chamfer display area is less than the distance between the centers of two adjacent ones of the light-emitting units distributed in the main display area.

[0023] Optionally, in the first chamfer display area, for any row of light-emitting units arranged in the second direction, the distance between the centers of two adjacent ones of the light-emitting units in the row gradually increases in the direction from the first curved side to the second curved side, and / or,

[0024] The multiple light-emitting units in the first chamfer display area are divided into multiple first light-emitting unit groups, and one first light-emitting unit group includes two adjacent ones of the 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 ones of the light-emitting units in each first light-emitting unit group gradually increases in the direction from the first straight side to the second straight side.

[0025] Optionally, the multiple light-emitting units are arranged in multiple rows along the second direction, and at least some rows of the light-emitting units respectively correspond to multiple first reference lines. The centers of the multiple light-emitting units in the same row are all located on a corresponding one of the first reference lines; the two end points of the first reference line are respectively on the first straight side and the second straight side, and the first reference line is an arc, and the center of the first reference line is the intersection point of the extension lines of the first straight side and the second straight side.

[0026] Optionally, the multiple rows of light-emitting units satisfy:

[0027] D1 = λ3 * 0.5 * P v ;

[0028] wherein, the D1 is the minimum distance between the first reference line corresponding to the row of light-emitting units closest to the first curved side and the first curved side; the λ3 is a third correction coefficient, and the value range of the λ3 is: 0.7 to 1.0; the P v is the row spacing between two adjacent rows of the light-emitting units.

[0029] Optionally, the connection line between the center of the light-emitting unit and the center of the first reference line is the second reference line corresponding to the light-emitting unit;

[0030] Any one of the light-emitting units satisfies:

[0031] A n =λ4*0.5*P A_n ;

[0032] wherein, 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 the light-emitting units and the first straight edge; the λ4 is a fourth correction coefficient, and the value range of the λ4 is: 0.7 to 1.0; the P A_n is the angle between the second reference lines corresponding to two adjacent light-emitting units in the nth row of the light-emitting units.

[0033] Optionally, both sides of the light-emitting unit oppositely arranged in the first direction are parallel to the second reference line corresponding to the light-emitting unit.

[0034] Optionally, the second side is a straight edge, and the first side is a curved edge; a pair of the second sides are respectively a third straight edge and a fourth straight edge, and a pair of the first sides are respectively a third curved edge and a fourth curved edge;

[0035] wherein, the third straight edge is parallel to the fourth straight edge, and the extension length of the third straight edge is less than the extension length of the fourth straight edge; both the third curved edge and the fourth curved edge protrude in a direction away from the center of the backplane.

[0036] Optionally, the third curved edge and the fourth curved edge are symmetrically arranged along the center line of the display substrate, and the midpoints of the third straight edge and the fourth straight edge are both located on the center line of the display substrate.

[0037] Optionally, the shape of the backplane is a curved trapezoid, at least one corner of the backplane has a chamfer, and the chamfered edge of the chamfer is a straight edge or a curved edge.

[0038] Optionally, there is a chamfer between the third straight edge and the third curved edge, and / or there is a chamfer between the third straight edge and the fourth curved edge.

[0039] Optionally, the chamfer between the third straight edge and the third curved edge is a second chamfer; the intersection point of the chamfered edge of the second chamfer and the third curved edge is a fourth intersection point, the intersection point of the extension line of the third straight edge and the extension line of the third curved edge is a fifth intersection point, and the intersection point of the chamfered edge of the second chamfer and the third straight edge is a sixth intersection point;

[0040] Among them, a third distance between the fifth intersection point and the fourth intersection point is greater than a fourth distance between the fifth intersection point and the sixth intersection point.

[0041] Optionally, a ratio of the third distance to the fourth distance ranges from 5 to 15.

[0042] Optionally, a chamfer between the third straight-edge and the third curved-edge is a second chamfer; an intersection point of an extension line of the third straight-edge and an extension line of the third curved-edge is a fifth intersection point, and an intersection point of a chamfer edge of the second chamfer and the third straight-edge is a sixth intersection point; the plurality of light-emitting units are arranged in multiple rows along the second direction;

[0043] The chamfer edge of the second chamfer satisfies:

[0044] B4 ≤ 0.8 * P s ;

[0045] Among them, the B4 is a distance between the fifth intersection point and the sixth intersection point; the P s is a minimum value among row spacings between any two adjacent rows of the light-emitting units.

[0046] Optionally, the backplane has a main display area and a second chamfer display area, and the second chamfer display area is closer to the second chamfer than the main display area;

[0047] In the first direction, a distance between centers of two adjacent light-emitting units distributed in the second chamfer display area is less than a distance between centers of two adjacent light-emitting units distributed in the main display area.

[0048] Optionally, in the second chamfer display area, for any row of light-emitting units arranged in the first direction, a distance between centers of two adjacent light-emitting units in the row gradually increases along a direction from the third curved-edge to the fourth curved-edge, and / or,

[0049] The plurality of light-emitting units in the second chamfer display area are divided into a plurality of 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, a distance between centers of two adjacent light-emitting units in each second light-emitting unit group gradually increases along a direction from the third straight-edge to the fourth straight-edge.

[0050] Optionally, the plurality of light-emitting units are arranged in multiple rows along the second direction, and the multiple rows of light-emitting units respectively correspond to multiple specified line segments. The centers of the multiple light-emitting units in the same row are all located on a corresponding specified line segment. The two endpoints of the specified line segment are respectively on the third curved edge and the fourth curved edge, and the specified line segment is parallel to the third straight edge.

[0051] Optionally, the third curved edge and the fourth curved edge are symmetrically arranged along the center line of the display substrate.

[0052] The multiple rows of light-emitting units satisfy:

[0053] S1 = λ6 * 0.5 * P L ;

[0054] wherein, S1 is the minimum distance between the specified line segment corresponding to the row of light-emitting units closest to the third straight edge and the third straight edge; λ6 is the sixth correction coefficient, and the value range of λ6 is: 0.5 to 1.0; P L is the row pitch between adjacent two rows of light-emitting units.

[0055] Optionally, any row of light-emitting units satisfies:

[0056] S n = λ7 * 0.5 * P p ;

[0057] wherein, S n is the distance between the center of the light-emitting unit closest to the third curved edge in the nth row of light-emitting units and the third curved edge; λ7 is the seventh correction coefficient, and the value range of λ7 is: 0.5 to 1.0, and P p is the distance between the centers of two adjacent light-emitting units in the nth row of light-emitting units.

[0058] In a second aspect, a display module is provided, including: a box body, and at least one display substrate located on one side of the box body, and the display substrate is any one of the above-mentioned display substrates.

[0059] In a third aspect, a display screen is provided, including: a plurality of spliced display modules, the display module is the above-mentioned display module, and the display surface of the display screen is an arc surface.

[0060] Optionally, the display screen extends spherically; the first sides of the display substrates in the display screen are straight edges, and the second sides are curved edges; a pair of the first sides are a first straight edge and a second straight edge respectively, and a pair of second sides are a first curved edge and a second curved edge respectively; the first sides correspond to the meridians of the sphere where the display screen is located, and the second sides correspond to the latitudes of the sphere where the display screen is located;

[0061] After the display substrate is assembled into the display screen, the plane formed by the first curved edge and the center of the sphere of the display screen is the first plane, and the plane formed by the second curved edge and the center of the sphere of the display screen is the second plane; the meridian plane corresponding to the meridian where the first straight edge coincides in the display screen is the first meridian plane, and the meridian plane corresponding to the meridian where the second straight edge coincides in the display screen 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;

[0062] The curvatures of the first curved edge and the second curved edge satisfy:

[0063] K1 = λ1 / (π * cosγ1 * R1 * (β / 360°) / β * sin(2γ1));

[0064] K2 = λ2 / (π * cosγ2 * R1 * (β / 360°) / β * sin(2γ2));

[0065] 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 where 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.

[0066] Optionally, 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;

[0067] The first correction coefficient corresponding to the curvature of the first curved edge in the first display substrate is less than the first correction coefficient corresponding to the curvature of the first curved edge in the second display substrate;

[0068] The second correction coefficient corresponding to the curvature of the second curved edge in the first display substrate is greater than the second correction coefficient corresponding to the curvature of the second curved edge in the second display substrate.

[0069] Optionally, the display screen extends spherically; the first sides of the display substrates in the display screen are straight edges, and the second sides are curved edges; a pair of the first sides are a first straight edge and a second straight edge respectively, and a pair of the second sides are a first curved edge and a second curved edge respectively; the first side corresponds to the meridian 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;

[0070] After the display substrate is assembled into the display screen, the plane formed by the first curved edge and the center of the sphere of the display screen is the first plane, and the plane formed by the second curved edge and the center of the sphere of the display screen is the second plane; the meridian plane corresponding to the meridian where the first straight edge coincides in the display screen is the first meridian plane, and the meridian plane corresponding to the meridian where the second straight edge coincides in the display screen 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;

[0071] The display substrate satisfies the following in the flattened state:

[0072] L1 = 2π * cosγ1 * R1 * (β / 360°);

[0073] L2 = 2π * cosγ2 * R1 * (β / 360°);

[0074] α = 2β * sin(2γ1);

[0075] L3 = L4 = π * cos(γ2 - γ1) * R1 * (β / 360°) / β * sin(2γ1);

[0076] Wherein, the L1 is the extension length of the first curved edge; the γ1 is the angle between the first plane and the equatorial plane of the display screen; the R1 is the radius of the sphere where the display screen is located; the β is the angle between the first meridian plane and the second meridian plane; the L2 is the extension length of the second curved edge; the γ2 is the angle between the second plane and the equatorial plane of the display screen; the α is the angle between the extension line of the first straight edge and the extension line of the second straight edge of the display substrate in the flattened state; the L3 is the extension length of the first straight edge; L4 is the extension length of the second straight edge.

[0077] Optionally, the display screen extends spherically; the second sides of the display substrates in the display screen are straight edges, and the first sides are curved edges; a pair of the second sides are the third straight edge and the fourth straight edge respectively, and a pair of the first sides are the third curved edge and the fourth curved edge respectively; the first side corresponds to the meridian 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;

[0078] After the display substrate is assembled into the display screen, the plane formed by any specified line segment parallel to the third straight edge in the display substrate and the center of the sphere of the display screen is the fifth plane, and the two end points of the specified line segment are respectively on the third curved edge and the fourth curved edge; the meridian plane corresponding to the meridian where the third curved edge coincides in the display screen is the third meridian plane, and the meridian plane corresponding to the meridian where the fourth curved edge coincides in the display screen 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;

[0079] The display substrate satisfies:

[0080] L x =λ x *(R1*2*tan(0.5*β)*(1 - 0.5*(cos(90° - 0.5*γ x )) 2 ));

[0081] Wherein, the L x is the extended length of the specified line segment; the λ x is the fifth correction coefficient of the specified line segment, and the value range of the λ x is: 0.95 - 1; the R1 is the radius of the display screen; the β is the included angle between the third meridian plane and the fourth meridian plane; the γ x is the included angle between the fifth plane and the equatorial plane of the display screen.

[0082] Optionally, among the two display substrates adjacent in the meridian direction of the display screen, they are respectively: the third display substrate and the fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate;

[0083] The fifth correction coefficient of the specified line segment in the third display substrate is less than the fifth correction coefficient of the specified line segment in the fourth display substrate.

[0084] Optionally, after the display substrate is assembled into the display screen, the plane formed by the third straight edge and the center of the sphere of the display screen is the third plane, and the plane formed by the fourth straight edge and the center of the sphere of the display screen is the fourth plane;

[0085] The display substrate satisfies:

[0086] L5 = λ8 * (R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 ));

[0087] L6 = λ9 * (R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ4)) 2 ));

[0088] Wherein, the L5 is the extension length of the third straight side; the λ8 is the eighth correction coefficient of the third straight side, and the value range of the λ8 is: 0.95 to 1; the γ3 is the included angle between the third plane and the equatorial plane of the display screen; the L6 is the extension length of the fourth straight side; the λ9 is the ninth correction coefficient of the fourth straight side, and the value range of the λ9 is: 0.95 to 1; the γ4 is the included angle between the fourth plane and the equatorial plane of the display screen.

[0089] Optionally, two adjacent display substrates in the meridional 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;

[0090] The eighth correction coefficient of the third straight side in the third display substrate is less than the eighth correction coefficient of the third straight side in the fourth display substrate, and / or,

[0091] The ninth correction coefficient of the fourth straight side in the third display substrate is less than the ninth correction coefficient of the fourth straight side in the fourth display substrate.

[0092] Optionally, the display screen extends spherically; the second sides of the display substrates in the display screen are straight sides, and the first sides are curved sides; a pair of the second sides are respectively a third straight side and a fourth straight side, and a pair of the first sides are respectively a third curved side and a fourth curved side; the first sides correspond to the meridians of the sphere where the display screen is located, and the second sides correspond to the latitudes of the sphere where the display screen is located; the third curved side and the fourth curved side are symmetrically arranged along the center line of the display substrate;

[0093] After the display substrate is assembled into the display screen, the plane formed by the third straight edge and the center of the sphere of the display screen is the third plane, and the plane formed by the fourth straight edge and the center of the sphere of the display screen is the fourth plane. The meridian plane corresponding to the meridian line that coincides with the third curved edge in the display screen is the third meridian plane, and the meridian plane corresponding to the meridian line that coincides with the fourth curved edge in the display screen 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:

[0094] L5 = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 )

[0095] L6 = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ4)) 2 )

[0096] M1 = R1 * (γ3 - γ4) / 180° * π

[0097] Wherein, the L5 is the extended length of the third straight edge; the R1 is the radius of the display screen; the β is the included angle between the third meridian plane and the fourth meridian plane; the γ3 is the included angle between the third plane and the equatorial plane of the display screen; the L6 is the extended length of the fourth straight edge; the γ4 is the included angle between the fourth plane and the equatorial plane of the display screen.

[0098] The beneficial effects brought by the technical solutions provided in the embodiments of the present application at least include:

[0099] By setting one of the first side and the second side of the backplane as a straight edge and the other as a curved edge, on the basis of ensuring the production of the display substrate, the splicing effect after the display substrate is assembled into the display screen can be improved. And for the row of light-emitting units closest to the first side, by setting the distance between the light-emitting unit closest to the first side and the first side to be less than or equal to the distance between two adjacent light-emitting units, this can be used to make up for the seams existing between the display substrates, improve the uniformity of the distance between adjacent light-emitting units in the display screen, thereby improving the splicing effect of multiple display substrates in the display screen, and further improving the visual effect of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0101] Figure 1 is a schematic structural diagram of a standard spherical surface;

[0102] Figure 2 is a schematic structural diagram of a display substrate provided by an embodiment of the present application;

[0103] Figure 3 is a schematic structural diagram of another display substrate provided by an embodiment of the present application;

[0104] Figure 4 is Figure 2 a partial enlarged view of the display substrate provided at Q1;

[0105] Figure 5 is a schematic diagram of a division method of a display substrate provided by an embodiment of the present application;

[0106] Figure 6 is a schematic structural diagram of a rotation unit of a spherical surface provided by an embodiment of the present application;

[0107] Figure 7 is a schematic structural diagram of yet another display substrate provided by an embodiment of the present application;

[0108] Figure 8 is Figure 7 a schematic structural diagram of the display substrate provided assembled into a display screen;

[0109] Figure 9 is a schematic structural diagram of a backplane in a display substrate provided by an embodiment of the present application;

[0110] Figure 10 is Figure 9 a partial enlarged view of the backplane provided at Q3;

[0111] Figure 11 is Figure 7 a partial enlarged view of the display substrate provided at Q2;

[0112] Figure 12 is Figure 9 another partial enlarged view of the backplane provided at Q3;

[0113] Figure 13 is Figure 9 yet another partial enlarged view of the backplane provided at Q3;

[0114] Figure 14 is a schematic diagram of a division structure of another display substrate provided by an embodiment of the present application;

[0115] Figure 15 is a schematic structural diagram of yet another display substrate provided by an embodiment of the present application;

[0116] Figure 16 is Figure 14 A schematic structural diagram of a display substrate assembled into a display screen provided;

[0117] Figure 17 is a schematic structural diagram of a backplane in another display substrate provided by an embodiment of the present application;

[0118] Figure 18 is Figure 17 A partial enlarged view of the backplane provided at Q5;

[0119] Figure 19 is Figure 15 A partial enlarged view of the display substrate provided at Q4;

[0120] Figure 20 is Figure 17 Another partial enlarged view of the backplane provided at Q5;

[0121] Figure 21 is Figure 17 Another partial enlarged view of the backplane provided at Q5;

[0122] Figure 22 is Figure 2 A top view of a light-emitting unit in the display substrate provided.

[0123] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0124] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe in detail the embodiments of the present application with reference to the drawings.

[0125] The display substrate provided by the embodiments of the present application can be used for assembly in a display screen extending in a spherical or ellipsoidal shape. Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a standard sphere. By dividing the sphere A in the latitudinal direction X1 and the longitudinal direction X2, the sphere A can be divided into a plurality of structural units A3 with specific shapes. The structural unit A3 is a two-dimensional curved surface, and each side is a curve, so that the structural unit A3 cannot be flattened into a plane. That is to say, it is impossible to produce a display substrate according to the shape of the structural unit A3. Therefore, in some related technologies, the sides of the display substrate are all set as straight edges. However, when a plurality of display substrates are spliced, obvious seams will be generated between the display substrates, resulting in a poor display effect of the display screen.

[0126] An embodiment of the present application provides a display substrate. Please refer to Figure 2 and Figure 3 . Figure 2 FIG. is a schematic structural diagram of a display substrate provided by an embodiment of the present application. Figure 3 FIG. is a schematic structural diagram of another display substrate provided by an embodiment of the present application. The structural features of the display substrate 10 mentioned in the embodiments of the present application are all the features of the display substrate 10 in a flattened 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.

[0127] 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 is electrically connected to the plurality of light-emitting units 12. In this way, the backplane 11 can be used to provide driving signals for each light-emitting unit 12. Among them, the substrate in the backplane 11 may be a flexible substrate or a substrate with toughness (for example, it may be a PCB board, PMMA, PI, or a metal substrate such as an 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 a plurality of display substrates 10 can be better. However, the embodiments of the present application do 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 a target shape.

[0128] The backplane 11 has: a pair of first sides C1 oppositely arranged in the first direction Y1, and a pair of second sides C2 oppositely arranged in the second direction Y2. One of the first side C1 and the second side C2 is a straight side, and the other is a curved side. This includes the following two cases: For the first case, please refer to Figure 2 , the first side C1 is a straight 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.

[0129] 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 feature of the display substrate 10 in a flattened state. When the display substrate 10 is assembled in a display screen extending in a spherical shape, the display substrate 10 can be bent along the first direction Y1 or the second direction Y2, so that the display substrate 10 can fit the spherical surface or the ellipsoidal surface better to improve the splicing effect.

[0130] The light-emitting unit 12 can serve as a light source. A plurality of light-emitting units 12 can be electrically connected to the driving 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 (abbreviation: LED) chip. The light-emitting unit 12 can be an LED chip of ordinary size, or a mini light-emitting diode (abbreviation: mini-LED) chip, or a micro light-emitting diode (abbreviation: Micro-LED) chip.

[0131] It should be noted that the light-emitting unit 12 can be a multi-in-one device, that is, multiple LED chips are encapsulated in the light-emitting unit 12 at the same time. For example, LED chips of three colors, red, green, and blue. Exemplarily, the light-emitting unit 12 can adopt surface mounted devices (abbreviation: SMD) technology, or micro LED in package (abbreviation: MIP) technology. In this case, the boundary of the light-emitting unit 12 can be defined as the outer contour of the overall package structure encapsulating multiple LED chips, and the center of the orthographic projection of the light-emitting unit 12 on the backplane 11 is the center of the orthographic projection of the outer contour of the package structure on the backplane 11.

[0132] Please refer to Figure 22 , Figure 22 is Figure 2 a top view of a light-emitting unit in the display substrate provided. The light-emitting unit 12 can also be a plurality of LED chips 121 that are independently arranged, for example, including LED chips 121 of three colors, red, green, and blue, that are independently arranged. Exemplarily, Figure 22 the shape of the LED chip 121 shown is rectangular, and the LED chips of the three colors can be arranged in a row. However, the embodiments of the present application do 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 plurality of LED chips 121 (such as Figure 2 the dotted line boundary shown), and the center 12-a of the orthographic projection of the light-emitting unit 12 on the backplane 11 is the center of the orthographic projection of the outer contour of the plurality of LED chips 121 on the backplane 11.

[0133] Among them, for a 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 backplane 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, for a row of light-emitting units 12 closest to the first side C1, in the arrangement direction of this 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 this row of light-emitting units 12 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the first sides C1 is 2, so the number of a row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0134] And / or, for a 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 backplane 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, for a row of light-emitting units 12 closest to the second side C2, in the arrangement direction of this 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 this row of light-emitting units 12 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of a row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0135] Further, in some embodiments, as Figure 2 and Figure 3 shown, the distance between the center of the orthographic projection of a row of light-emitting units 12 closest to the second side C2 on the backplane 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 a row of light-emitting units 12 closest to the second side C2 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of a row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0136] and / or, in some embodiments, such 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 backplane 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 a 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 backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of the row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0137] Taking Figure 2 a corner of the display substrate 10 shown as an example, please refer to Figure 4 , Figure 4 which Figure 2 is a partial enlarged view of the provided display substrate at Q1. The row of light-emitting units 12 closest to the first side C1 can be the row of light-emitting units 12 where the light-emitting unit P1 and the light-emitting unit P3 are located. Here, the distance D1 between the center of the light-emitting unit P1 and the second side C2 is less than or equal to half of the distance P v between the centers of the light-emitting unit P1 and the light-emitting unit P3, that is, by reducing the distance D1 between the light-emitting unit P1 and the second side C2, the possible seam between adjacent display substrates 10 in the second direction Y2 in the display screen can be compensated, so as to reduce the difference in the center spacing of the light-emitting units 12 at the splicing part in the second direction Y2 and the center spacing of the light-emitting units 12 in other areas, and further improve the splicing effect of multiple display substrates 10 in the display screen.

[0138] Taking Figure 2 a corner of the display substrate 10 shown as an example, please refer to Figure 4 , the row of light-emitting units 12 closest to the second side C2 can be the row of light-emitting units 12 where the light-emitting unit P1 and the light-emitting unit P2 are located. Here, the distance D2 between the center of the light-emitting unit P1 and the second side C2 is 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 seam between adjacent display substrates 10 in the first direction Y1 in the display screen can be compensated, so as to reduce the difference in the center spacing of the light-emitting units 12 at the splicing part in the first direction Y1 and the center spacing of the light-emitting units 12 in other areas, and further improve the splicing effect of multiple display substrates 10 in the display screen.

[0139] Further, in some embodiments, as Figure 3 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 backplane 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 second side C2 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of the row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0140] And / or, in some embodiments, as Figure 3 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 backplane 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 backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of the row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0141] 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 connection line of the centers of a 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, and 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, in Figure 2 the shown display substrate 10, 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 pitch of two adjacent light-emitting units 12 in the arrangement direction is the length of the arc segment between the centers of two adjacent light-emitting units 12. However, the embodiments of the present application do not limit this, and it can also be approximately the minimum distance between the centers of two adjacent light-emitting units 12 for the convenience of calculation. In Figure 3 the shown display substrate 10, the arrangement direction of the row of light-emitting units 12 closest to the first side C1 is the extension direction of a straight line.

[0142] Based on the above setting method, the effect of reducing the distance between the light-emitting unit 12 and the outer contour of the backplane 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, in this way, the uniformity of the pitch between adjacent light-emitting units in at least one direction of the display screen can be improved, thereby improving the splicing effect of the display screen.

[0143] In summary, the embodiment of the present application provides a display substrate. Among them, by setting one of the first side and the second side of the backplane as a straight edge and the other as a curved edge, on the basis of ensuring the production of the display substrate, the splicing effect after the display substrate is assembled into the display screen can be improved. And for the row of light-emitting units closest to the first side, by setting the distance between the light-emitting unit closest to the first side and the first side to be less than or equal to the distance between two adjacent light-emitting units, this can be used to make up for the seams existing between the display substrates, improve the uniformity of the pitch between adjacent light-emitting units in the display screen, thereby improving the splicing effect of multiple display substrates in the display screen, and further improving the visual effect of the display screen.

[0144] The embodiment of the present application can adopt a variety of partitioning methods to determine the structure of a single display substrate in the display screen. The following will be described with two exemplary embodiments:

[0145] In the first exemplary embodiment, please refer to Figure 5 , Figure 5 which is a schematic diagram of a partitioning method of a display substrate provided by the embodiment of the present application. This partitioning method may include:

[0146] (1) Horizontally slice the spherical surface A along the latitude direction. Horizontal slicing means slicing the spherical surface A through multiple planes parallel to the equatorial plane to obtain multiple toroidal surfaces A1. Among them, the multiple planes parallel to the equatorial plane used for horizontal slicing can be set at equal distances.

[0147] It should be noted that Figure 5 the spherical surface A in Figure 6 is not a standard spherical surface. Please refer to Figure 6 which is a schematic diagram of the structure of a rotation unit of a spherical surface provided by the embodiment of the present application. The shape of the rotation unit A4 is a polygon. Among them, taking the longest side of the rotation unit A4 as the rotation axis A41, the side opposite to the rotation axis A41 is formed by connecting multiple straight line segments and is not a curve. Rotating the rotation unit A4 around the rotation axis A41 for one week can obtain the spherical surface A. In this way, each of the several toroidal surfaces A1 obtained by slicing the spherical surface A is a one-dimensional curved surface.

[0148] (2) Vertically slice the multiple toroidal surfaces A1 along the longitude direction. Vertical slicing means slicing the spherical surface A through multiple meridian planes to obtain multiple lobe surfaces A2. Among them, the multiple meridian planes used for vertical slicing can be set at equal angles.

[0149] (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 latitude direction. In the flattened state, the two opposite sides of the structural unit A3 in the longitude direction are curved sides, and the two opposite sides in the latitude direction are straight sides, so that the shape structure of the display substrate can be determined based on the structural unit A3. Here, the display substrate can be a flat surface during production, and can be a curved surface when assembled into a display screen.

[0150] The display substrate obtained by the first division method in the present application embodiment can be referred to 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 a first direction Y1, and a pair of second edges C2 arranged opposite to each other in a 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.

[0151] The extension line of the first straight edge C11 intersects with the extension line of the second straight edge C12, and the intersection point is O1. At least part 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. Here, the extension length of the first curved edge C21 is different from the extension length of the second curved edge C22, which is more in line with the geometric characteristics of the sphere.

[0152] The center of the arc edge in the first curved edge C21 and the center of the arc edge in the second curved edge C22 are both located on the side of the first curved edge C21 away from the second curved edge C22. That is, 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.

[0153] For a 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 on the backplane 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, for a row of light-emitting units 12 closest to the first side C1, in the arrangement direction of this 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 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the first sides C1 is 2, so the number of a row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0154] And / or, for a 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 on the backplane 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, for a row of light-emitting units 12 closest to the second side C2, in the arrangement direction of this 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 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of a row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0155] Further, in some embodiments, the distance between the center of the orthographic projection of a row of light-emitting units 12 closest to the second side C2 on the backplane 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 a row of light-emitting units 12 closest to the first straight side C11 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, such as the first curved side C21 and the second curved side C22, so the number of a row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2. A specific embodiment is as followsFigure 7 as shown

[0156] And / or, in some embodiments, the distance between the center of the orthographic projection of a row of light-emitting units 12 closest to the first side C1 on the backplane 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 a row of light-emitting units 12. For example, the distance between the center of the orthographic projection of a row of light-emitting units 12 closest to the first side C1 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the first sides C1 is 2, such as the first straight side C11 and the second straight side C12. Therefore, the number of a row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1. A specific embodiment is as Figure 7 as shown

[0157] It should be noted that at least part of the first curved side C21 and the second curved side C22 are arc sides, that is, the first curved side C21 and the second curved side C22 can be formed by connecting an arc side and a straight side, etc., or both the first curved side C21 and the second curved side C22 are arc sides. In addition, the present application does not strictly require that the arc sides of the first curved side C21 and the second curved side C22 are all standard arc sides, and there may be certain manufacturing errors.

[0158] For the display substrate 10 assembled closer to the south pole or the north pole of the display screen, the extension length of the first curved side C21 will gradually decrease until the first curved side C21 shrinks to a point and coincides with the south pole or the north pole. Therefore, the shape of the display substrate assembled at the south pole or the north pole can be a sector. In addition, the shape of the display substrate assembled at the south pole or the north pole can also be a circle, that is, the display substrate assembled at the south pole or the north pole is not vertically divided, which can improve the splicing effect at the south pole or the north pole.

[0159] In summary, the embodiments of the present application provide a display substrate. Among them, the first side of the backplane is a straight side, and the second side is a curved side, which can ensure that the display substrate can be flattened for easy production and manufacturing. At least part of the first curved side and the second curved side are arc sides, the extension length of the first curved side is less than the extension length of the second curved side, and both the first curved side and the second curved side protrude in the same direction, which can make the shape of the display substrate more conform to the geometric characteristics of the spherical surface, thereby reducing the seam during the assembly of the display substrate, and further improving the visual effect of the display screen equipped with the display substrate.

[0160] Optionally, the centers of the circular arc sides in the first curved side C21 and the second curved side C22 are both the intersection point O1 of the extension line of the first straight side C11 and the extension line of the second straight side C12. The first straight side C11 and the second straight side C12 are symmetrically arranged along the connection line between the center of the first curved side C21 and the center of the backplane 11. In this way, the shape of the display substrate 10 is relatively regular, which is convenient for manufacturing.

[0161] The external dimensions of the display substrate provided by the first exemplary embodiment will be described below:

[0162] Optionally, please refer to Figure 7 and Figure 8 , Figure 8 is Figure 7 a schematic structural diagram of the display substrate provided assembled into the display screen. After the display substrate 10 is assembled into the display screen 20 that extends in a spherical shape, the plane formed by the first curved side C21 and the center O2 of the display screen 20 is the first plane, and the plane formed by the second curved side C22 and the center O2 of the display screen 20 is the second plane. The meridian plane corresponding to the meridian that coincides with the first straight side C11 in the display screen 20 is the first meridian plane, and the meridian plane corresponding to the meridian that coincides with the second straight side C12 in the display screen 20 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 the direction 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 meridian is located.

[0163] The display substrate 10 satisfies the following in the flattened state:

[0164] L1 = 2π * cosγ1 * R1 * (β / 360°);

[0165] L2 = 2π * cosγ2 * R1 * (β / 360°);

[0166] α = 2β * sin(2γ1);

[0167] L3 = L4 = π * cos(γ1 - γ2) * R1 * (β / 360°) / β * sin(2γ1);

[0168] Among them, 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 extension line of the first straight edge C11 and the extension line of the second straight edge C12 of the display substrate 10 in the flattened state. L3 is the extended length of the first straight edge C11. L4 is the extended length of the second straight edge C12.

[0169] It should be noted that the extended length L1 of the first curved edge C21, the extended length L2 of the second curved edge C22, the angle α, the extended length L3 of the first straight edge C11, and the extended length L4 of the second straight edge C12 are all the external structure characteristics of the display substrate 10 in the flattened state. The angle γ1, the angle γ2, and the angle β are all parameters determined according to the corresponding positions of the display substrate 10 in the assembled state. Specifically, the display substrate 10 in the assembled state can present a curved state.

[0170] In the embodiment of the present application, the range of the size of the display substrate 10 in the first direction Y1 can be: 5 cm - 25 cm, and the range of the size of the display substrate 10 in the second direction Y2 can be: 10 cm - 40 cm, which is convenient for manufacturing and placing circuit devices.

[0171] Based on the radius R1 of the display screen 20 and the range of the size of the display substrate 10 in the first direction Y1, the number of display substrates 10 that need to be divided in each toroidal surface can be determined, and thus the angle β can be determined. Exemplarily, when the number of display substrates 10 that can be divided in the toroidal surface near the equator is set to 192, β = 360° / 192 = 1.875°.

[0172] Based on the radius R1 of the display screen 20 and the range of the size of the display substrate 10 in the second direction Y2, the number of toroidal surfaces that need to be divided in the spherical surface can be determined, and thus the corresponding angles γ1 and γ2 of the display substrate 10 can be determined.

[0173] Through the above formula, the dimensions of each side of the backplane 11 in the display substrate 10 and the angle α can be calculated. The angle α can not only reflect the inclination degree of the first straight edge C11 and the second straight edge C12, but also reflect the bending degree of the first curved edge C21 and the second curved edge C22, thereby improving the accuracy of determining the external dimensions of the display substrate 10, so as to facilitate production and manufacturing according to the calculated external dimensions.

[0174] Under the influence of factors such as poor manufacturing accuracy and assembly position offset of the display substrate 10, it is easy to cause interference between the corners of the display substrate 10 and the adjacent display substrate 10 during assembly. Therefore, in the embodiments of the present application, the display substrate 10 can be modified to reduce the interference risk.

[0175] In a possible implementation manner, the embodiments of the present application can adjust the curvatures of the first curved edge C21 and the second curved edge C22 of the backplane 11.

[0176] Optionally, please refer to Figure 7 and Figure 8 , the curvatures of the first curved edge C21 and the second curved edge C22 satisfy:

[0177] K1 = λ1 / (π * cosγ1 * R1 * (β / 360°) / β * sin(2γ1));

[0178] K2 = λ2 / (π * cosγ2 * R1 * (β / 360°) / β * sin(2γ2));

[0179] 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.

[0180] It should be noted that both the curvature K1 and the curvature K2 are the external shape structure characteristics of the display substrate 10 in the flattened state.

[0181] Through the above formula, the curvatures of the first curved edge C21 and the second curved edge C22 in the display substrate 10 can be calculated to reflect the bending degrees of the first curved edge C21 and the second curved edge C22, so as to improve the accuracy of determining the external dimensions of the display substrate 10, and facilitate production and manufacturing according to the calculated curvatures of the first curved edge C21 and the second curved edge C22.

[0182] Based on the value range of the first correction coefficient λ1, it can be known that by setting the first correction coefficient λ1 less than or equal to 1, it can adapt to the situation without interference risk, or in the case of interference risk, the bending degree of the first curved edge C21 can be adjusted to be smaller. And by setting λ1 greater than or equal to 0.95, it can ensure that the adjustment degree of the bending degree of the first curved edge C21 will not be too large to avoid the difficulty in manufacturing the display substrate 10.

[0183] Based on the value range of the second correction coefficient λ2, it can be known that by setting the second correction coefficient λ2 to be greater than or equal to 1, it can be adapted to the case where there is no interference risk, or in the case where there is an interference risk, the bending degree of the second curved edge C22 can be adjusted to be relatively large. And by setting λ2 to be greater than or equal to 0.95, it can be ensured that the adjustment degree of the bending degree of the second curved edge C22 is not too large, so as to avoid the difficulty in manufacturing the display substrate 10.

[0184] Therefore, under the adjustment of the first correction coefficient λ1 and the second correction coefficient λ2, the protrusion degree of the corner of the display substrate 10 is small, which can make the two endpoints of the first curved edge C21 slightly adjusted upward, and make the two endpoints of the second curved edge C22 slightly adjusted downward. After the display substrate 10 is assembled into the display screen extending in a spherical shape, there can be a certain assembly gap between two adjacent display substrates 10, thereby reducing the risk of interference at the corners of the display substrate 10 and facilitating manufacturing and assembly.

[0185] It should be noted that when there is an interference risk, set λ1 to be greater than or equal to 0.95 and less than 1, and set λ2 to be less than or equal to 1.05 and greater than 1 to achieve the modification of the display substrate 10. When the manufacturing accuracy and assembly accuracy of the display substrate 10 meet the requirements, the display substrate 10 is not likely to interfere, and the first correction coefficient λ1 and the second correction coefficient λ2 can also take 1, that is, the curvatures of the first curved edge C21 and the second curved edge C22 can not be adjusted.

[0186] Optionally, for two display substrates 10 adjacent in the meridional 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 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. When the included angle α is relatively large, the value range of the first correction coefficient λ1 can be: 0.99 - 1.0. This is more in line with the geometric characteristics of the spherical surface, thereby improving the splicing effect of the display substrate 10.

[0187] For two display substrates 10 adjacent in the warp 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 less than the second correction coefficient λ2 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10. Exemplarily, the value range of the second correction coefficient λ2 corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 can be: 1.0 to 1.01, and the value range of the second correction coefficient λ2 corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10 can be: 1.02 to 1.05. When the included angle α is relatively large, the value range of the second correction coefficient λ2 can be: 1.0 to 1.01. This is more in line with the geometric characteristics of the spherical surface, thereby improving the splicing effect of the display substrate 10.

[0188] In another possible implementation, the embodiments of the present application can chamfer the corners of the backplane 11.

[0189] Please refer to Figure 9 , Figure 9 FIG. is a schematic structural diagram of the backplane of a display substrate provided by an embodiment of the present application. The shape of the backplane 11 is a fan-shaped ring, and at least one corner of the backplane 11 has a chamfer, and the chamfering edge C3 of the chamfer is a straight edge or a curved edge. By setting the chamfer, the protrusion degree of the corner of the display substrate 10 can also be reduced, thereby reducing the risk of interference at the corner of the display substrate 10.

[0190] It should be noted that Figure 9 the chamfer between the first straight edge C11 and the first curved edge C21 is taken as an example, but the embodiments of the present application are not limited to this. Chamfers can be provided at each corner of the backplane 11, which can further reduce the interference risk. Optionally, there is a chamfer between the first curved edge C21 and the first straight edge C11, and / or there is a chamfer between the first curved edge C21 and the second straight edge C12. That is, chamfers are provided at at least one of the two corners on the side close to the first curved edge C21 with a shorter length. Compared with the other two corners, this can facilitate reducing the manufacturing difficulty.

[0191] In addition, Figure 9 only the case where the chamfering edge C3 is a straight edge is shown as an example, but the embodiments of the present application are not limited to this. When the chamfering edge C3 is a curved edge, the chamfering edge C3 protrudes outward from the backplane 11, thereby reducing the protrusion degree of the corner.

[0192] Optionally, please refer to Figure 10 , Figure 10 is Figure 9A partial enlarged view of the provided backplane at Q3. The chamfer between the first straight edge C11 and the first curved edge C21 is the first chamfer. The intersection point of the chamfer edge C3 of the first chamfer and the first straight edge C11 is the first intersection point E1, the intersection point of the extension line of the first curved edge C21 and the extension line of the first straight edge C11 is the second intersection point E2, and the intersection point of the chamfer edge C3 of the first chamfer and the first curved edge C21 is the third intersection point E3.

[0193] Among them, the first distance B1 between the second intersection point E2 and the first intersection point E1 is less than the second distance B2 between the second intersection point E2 and the third intersection point E3. Here, for the display substrate 10 provided by the first exemplary embodiment, it is necessary to set the second distance B2 to be larger to ensure that the interference risk in the second direction Y2 can be reduced. Therefore, setting the first distance B1 to be less than the second distance B2 can reduce the modification difficulty and avoid the problem of obvious seam caused by setting the second distance B2 too large.

[0194] Optionally, the ratio of the second distance B2 to the first distance B1 is in the 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 interference risk.

[0195] In addition, the embodiment of the present application can also set the chamfer edge C3 of the first chamfer to be tangent to the first curved edge C21, so that the position of the chamfer can be quickly confirmed.

[0196] Optionally, the chamfer between the first straight edge C11 and the first curved edge C21 is the first chamfer. The intersection point of the chamfer edge C3 of the first chamfer and the first straight edge C11 is the first intersection point E1, and the intersection point of the extension line of the first curved edge C21 and the extension line of the first straight edge C11 is the second intersection point E2.

[0197] The chamfer edge C3 of the first chamfer satisfies:

[0198] B1≤0.8*P s ;

[0199] Among them, B1 is the distance between the first intersection point E1 and the second intersection point E2. P s is the minimum value of the row pitch between any two adjacent light-emitting units 12. Here, the row pitch can be: the distance between the centers of two light-emitting units 12 that are oppositely arranged in the second direction Y2 among two adjacent light-emitting units 12.

[0200] The above formula determines the setting range of the first chamfer through the line spacing between two adjacent light-emitting units. On the one hand, by setting the first distance B1 within this range, it is convenient to assemble the display substrate 10 in a display screen extending in a spherical shape. On the other hand, it can also avoid the problem that there is no space for some light-emitting units 12 in the area where the first chamfer is located, so that the influence of the first chamfer on the arrangement of the light-emitting units 12 is relatively small. And 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.

[0201] In the embodiment of the present application, the above two ways of modifying the display substrate 10 can be combined and applied. That is, the curvature of the first curved edge C21 and the second curved edge C22 can be adjusted while chamfers are provided at the corners of the backplane 11. Among them, the above formula for the curvature K1 is applicable to the positions of the first curved edge C21 except for the chamfers, and the above formula for the curvature K2 is applicable to the positions of the second curved edge C22 except for the chamfers. Correspondingly, the relative magnitude relationship of the first correction coefficient λ1 in different display substrates 10 is applicable to the positions of the first curved edge C21 except for the chamfers, and the relative magnitude relationship of the second correction coefficient λ2 in different display substrates 10 is applicable to the positions of the second curved edge C22 except for the chamfers.

[0202] The arrangement of the light-emitting units in the display substrate provided by the first exemplary embodiment will be described below:

[0203] Optionally, please refer to Figure 7 , a plurality of light-emitting units 12 are arranged in multiple rows along the second direction Y2, and at least some rows of light-emitting units 12 respectively correspond to a plurality of 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 end points of the first reference line G1 are respectively on the first straight edge C11 and the second straight edge C12, and the first reference line G1 is an arc. The center of the first reference line G1 is the intersection point of the extension lines of the first straight edge C11 and the second straight edge C12. That is, the arrangement direction of a row of light-emitting units 12 is the extension direction of its corresponding first reference line G1.

[0204] Since the extension lengths of the first reference lines G1 corresponding to different rows of light-emitting units 12 are different, the numbers of light-emitting units 12 in different rows are also different, so that the difference in the distances between the centers of any two adjacent light-emitting units 12 in different rows can be reduced. Exemplarily, along the direction from the first curved edge C21 to the second curved edge C22, the number of light-emitting units 12 in each row gradually increases.

[0205] Optionally, the row spacing between any two rows of the 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 the light-emitting units 12 is equal. In this way, 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. Here, in the embodiments of the present application, it is not required that the arrangement directions of the plurality of light-emitting units 12 be strictly parallel to the first direction Y1 and the second direction Y2, but they are substantially similar.

[0206] Optionally, please refer to Figure 7 and Figure 11 , Figure 11 is Figure 7 a partial enlarged view of the provided display substrate at Q2. The multiple rows of light-emitting units 12 satisfy:

[0207] D1 = λ3 * 0.5 * P v ;

[0208] 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 to 1.0. P 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.

[0209] Based on the value range of the third correction coefficient λ3, it can be known that by setting the third correction coefficient λ3 to be less than or equal to 1, it can adapt to the case where there is no seam, or, in the case where there is a seam, reduce the distance D1, so that the possible seam between adjacent display substrates 10 in the second direction Y2 in the display screen can be compensated, and thus the splicing effect of the multiple display substrates 10 in the display screen can be improved. And, by setting λ3 to be greater than or equal to 0.7, it can be ensured that the distance between the row of light-emitting units 12 closest to the first curved edge C21 and the first curved edge C21 is not too close, so as to avoid insufficient setting space for the light-emitting units 12 and the corresponding circuit structures.

[0210] 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 can be: 0.7 to 0.8, so that the splicing effect can be improved by adjusting the degree of reducing the distance D1.

[0211] In the embodiments of the present application, the row spacing P v between two adjacent rows of light-emitting units 12 b can be determined according to the target spacing P bThe pitch P can be the pitch between two adjacent light-emitting units 12 specified in advance in the first direction Y1 or the second direction Y2. v Satisfy:

[0212] P v = L 1 / [L1 / P b ;

[0213] Wherein, L1 is the extended length of the first straight side C11. Since it cannot be ensured that the extended length L1 of the first straight side C11 is an integer multiple of the target pitch P b In the above formula, by taking the integer of the ratio of the extended length L1 of the first straight side C11 to the target pitch P b to determine the number of rows of the light-emitting units 12. The pitch P determined in this way v has higher accuracy. Here, the way of taking the integer can include any one of rounding up, rounding down and rounding.

[0214] Optionally, the connection line between the center of the light-emitting unit 12 and the center O1 of the first reference line G1 is the second reference line G2 corresponding to the light-emitting unit 12.

[0215] Any row of light-emitting units 12 satisfies:

[0216] A n = λ4 * 0.5 * P A_n ;

[0217] Wherein, A n is the angle between the second reference line G2 corresponding to the light-emitting unit 12 closest to the first straight side C11 in the nth row of light-emitting units 12 and the first straight side C11. 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 G2 corresponding to two adjacent light-emitting units 12 in the nth row of light-emitting units 12.

[0218] Based on the value range of the fourth correction coefficient λ4, it can be seen that by setting the fourth correction coefficient λ4, the angle A can be reduced n , so as to compensate for the possible seams between adjacent display substrates 10 in the first direction Y1 in the display screen, and further improve the splicing effect of multiple display substrates 10 in the display screen.

[0219] In the embodiment of the present application, the angle P between the second reference lines G2 corresponding to two adjacent light-emitting units 12 A_n can be determined according to the target pitch P b The target pitch P bmay be the pitch between two adjacent light-emitting units 12 specified in advance in the first direction Y1 or the second direction Y2, and the included angle P A_n Satisfy:

[0220] P A_n =α / [DL n / P b ;

[0221] Wherein, 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 n cannot be ensured to be an integer multiple of the target pitch P b , in the above formula, by taking the integer part of the ratio of the length DL n to the target pitch P b , the number of light-emitting units 12 in the light-emitting unit 12 in the nth row is determined. The accuracy of the included angle P A_n determined in this way is relatively high. Here, the way of taking the integer part may include any one of rounding up, rounding down, and rounding to the nearest integer.

[0222] It should be noted that since the lengths DL n of the first reference lines G1 corresponding to the light-emitting units 12 in each row are not the same, the number and / or angle P A_n of the light-emitting units 12 in each row of light-emitting units 12 are different.

[0223] In addition, since a row of light-emitting units 12 is arranged along the extending direction of the arc, the accuracy of determining the position of the light-emitting unit 12 by the included angle A n and the included angle P A_n is relatively high, and the light-emitting units 12 in the same row can be evenly arranged. Since the radii corresponding to the arc segments between the centers of two adjacent light-emitting units 12 in a row of light-emitting units 12 are the same, the relative magnitude relationship between the included angle A n and the included angle P A_n can also be converted into the relative magnitude relationship between the length of the arc segment corresponding to the included angle A n and the length of the arc segment corresponding to the included angle P A_n . Further, the length of the arc segment can be approximated as a straight-line distance for easy calculation.

[0224] Optionally, both of the two opposite sides of the light-emitting unit 12 in the first direction Y1 are parallel to the second reference line G2 corresponding to the light-emitting unit 12. Here, since a row of light-emitting units 12 is arranged along the extending direction of the arc, the arrangement direction of the two opposite sides of the light-emitting unit 12 has deviated from the first direction Y1. By setting both of these two sides to be parallel to the second reference line G2 corresponding to the light-emitting unit 12, after the display substrate 10 is assembled on the display screen extending in a spherical or ellipsoidal shape, the human eye can directly face a plurality of light-emitting units 12 in the display substrate 10, reducing the problem that the torsion of the light-emitting unit 12 affects the display uniformity.

[0225] Optionally, please refer to Figure 12 and Figure 13 , Figure 12 is Figure 9 another partial enlarged view of the provided backplane at Q3, Figure 13 is Figure 9 yet another partial enlarged view of the provided backplane at Q3. The backplane 11 has a main display area 111 and a first chamfer display area 112. The first chamfer display area 112 is closer to the first chamfer than the main display area 111. Exemplarily, the main display area 111 can be the area other than the first chamfer display area 112. In the case where chamfers are also provided at other corners, the main display area 111 should exclude the areas where other chamfers are located.

[0226] In the second direction Y2, the distance F2 between the centers of two adjacent light-emitting units 12 distributed in the first chamfer display area 112 is less than or equal to the distance F1 between the centers of two adjacent light-emitting units 12 distributed in the main display area 111.

[0227] Among them, please refer to Figure 12 , in the case where the modification of the display substrate 10 is small, for example, when the first distance B1 is small, the influence of the first chamfer on the arrangement of the light-emitting units 12 is small. The backplane 11 can be modified only, and the arrangement positions of the light-emitting units 12 in the first chamfer display area 112 remain unchanged. That is, the distance F1 is set equal to the distance F2. Exemplarily, when B1 ≤ 0.2*P s the distance F1 is set equal to the distance F2.

[0228] Please refer to Figure 13 , in the case where the modification of the display substrate 10 is large, for example, when the first distance B1 is large, the influence of the first chamfer on the arrangement of the light-emitting units 12 is large. The backplane 11 can be modified, and the arrangement positions of the light-emitting units 12 in the first chamfer display area 112 can be adjusted. That is, the distance F2 is set less than the distance F1. Exemplarily, when 0.2*P s ≤ B1 ≤ 0.8*P sIn the case of, set the distance F2 to be less than the distance F1.

[0229] In the embodiment of the present application, the number of rows of the light-emitting units 12 in the first chamfer display area 112 that need to be adjusted can be further determined according to the value range of the first distance B1. Exemplarily, when 0.2*P s ≤B1≤0.3*P s In the case of, the row spacing of the 1 to 2 rows of light-emitting units 12 closest to the chamfer edge C3 of the first chamfer in the first chamfer display area 112 can be reduced. When 0.3*P s ≤B1≤0.5*P s In the case of, the row spacing of the 2 to 4 rows of light-emitting units 12 closest to the chamfer edge C3 of the first chamfer in the first chamfer display area 112 can be reduced. When 0.5*P s ≤B1≤0.8*P s In the case of, the row spacing of the 4 to 7 rows of light-emitting units 12 closest to the chamfer edge C3 of the first chamfer in the first chamfer display area 112 can be reduced.

[0230] Optionally, please refer to Figure 9 and Figure 13 , in the first chamfer 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 a row of light-emitting units 12 gradually increases along the direction from the first curved edge C21 to the second curved edge C22. Exemplarily, 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, in the second direction Y2, the row spacing of the light-emitting units 12 in the first chamfer display area 112 can achieve a gradient effect, so that the display effect transition between the first chamfer display area 112 and the main display area 111 is more natural.

[0231] And / or, the multiple light-emitting units 12 in the first chamfer display area 112 are divided into multiple first light-emitting unit groups 12a. A 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 edge C11 to the second straight edge C12. Exemplarily, 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 chamfer display area 112 can achieve a gradient effect, so that the display effect transition between the first chamfer display area 112 and the main display area 111 is more natural.

[0232] In summary, the embodiment of the present application provides a display substrate. Among them, the first side of the backplane is a straight edge, and the second side is a curved edge, which can ensure that the display substrate can be flattened for easy production and manufacturing. 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 that of the second curved edge, and both the first curved edge and the second curved edge protrude in the same direction, so that the shape of the display substrate can better conform to the geometric characteristics of the spherical surface, thereby reducing the seam during the assembly of the display substrate, and further improving the visual effect of the display screen equipped with the display substrate.

[0233] In the second exemplary embodiment, please refer to Figure 14 , Figure 14 which is a schematic diagram of the division structure of another display substrate provided by the embodiment of the present application. This division method may include:

[0234] (1) Vertically divide the spherical surface A along the meridian direction. Vertical division means dividing the spherical surface A through multiple meridian planes to obtain multiple lobe surfaces A2. Among them, the multiple meridian planes used for vertical division can be set at equal angles. Here, Figure 14 the shown spherical surface A can be a standard spherical surface.

[0235] (2) Horizontally divide the multiple lobe surfaces A2 along the latitude direction. Horizontal division means dividing the spherical surface A through multiple planes parallel to the equatorial plane. Among them, the multiple planes parallel to the equatorial plane used for horizontal division can be set at equal distances. Here, the intersection line of the plane used for horizontal division and the spherical surface A is a straight line.

[0236] (3) After horizontal division and vertical division, the spherical surface A can be divided into multiple structural units A3, and the structural units A3 are flattened along the meridian direction. The two opposite sides of the flattened structural unit A3 in the meridian direction are straight edges, and the two opposite sides in the latitude direction are curved edges, so that the shape structure of the display substrate can be determined according to the structural unit A3. Here, the display substrate can be planar during production and manufacturing, and can be curved when assembled into the display screen.

[0237] For the display substrate obtained by the embodiment of the present application based on the above second division method, please refer to Figure 15 , Figure 15It is a schematic structural diagram of another display substrate provided by 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 the features of the display substrate 10 in the flattened 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. The backplane 11 has: a pair of first sides C1 oppositely arranged in the first direction Y1, and a pair of second sides C2 oppositely arranged in the second direction Y2. The first side C1 is a curved side, and the second side C2 is a straight side. The pair of first sides C1 are respectively a third curved side C13 and a fourth curved side C14, and the pair of second sides C2 are respectively a third straight side C23 and a fourth straight side C24.

[0238] Among them, the third straight side C23 and the fourth straight side C24 are parallel, 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 in a direction away from the center of the backplane 11.

[0239] 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 projection of the light-emitting unit 12 closest to the second side C2 on the backplane 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, for the row of light-emitting units 12 closest to the first side C1, in the arrangement direction of this row of light-emitting units 12, the distance between the center of the projection of the light-emitting unit 12 closest to the second side C2 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the first sides C1 is 2, so the number of the row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1.

[0240] And / or, for a 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 on the backplane 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, for a row of light-emitting units 12 closest to the second side C2, in the arrangement direction of this 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 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, so the number of a row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2.

[0241] Further, in some embodiments, the distance between the center of the orthographic projection of a row of light-emitting units 12 closest to the second side C2 on the backplane 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 a row of light-emitting units 12 closest to the first straight side C11 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the second sides C2 is 2, such as the third straight side C23 and the fourth straight side C24, so the number of a row of light-emitting units 12 closest to the second side C2 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the second side C2. A specific embodiment is as Figure 15 shown.

[0242] And / or, in some embodiments, the distance between the center of the orthographic projection of a row of light-emitting units 12 closest to the first side C1 on the backplane 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 a row of light-emitting units 12 closest to the first side C1 on the backplane 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 this row of light-emitting units 12. It can be understood that the number of the first sides C1 is 2, such as the third curved side C13 and the fourth curved side C14, so the number of a row of light-emitting units 12 closest to the first side C1 can be 2, and the above situation can be satisfied for each row of light-emitting units 12 closest to the first side C1. A specific embodiment is as Figure 15 shown.

[0243] It should be noted that the third curved side C13 and the fourth curved side C14 are not conic curves and do not have a fixed analytical formula. Therefore, in order to determine the external dimensions of the third curved side C13 and the fourth curved side C14, the embodiments of the present application can use approximate curve fitting, that is, discretize the third curved side C13 and the fourth curved side C14 to obtain a series of discrete points, and determine the external dimensions of the third curved side C13 and the fourth curved side C14 by curve fitting based on the positions of these discrete points.

[0244] For the display substrate 10 assembled closer to the south pole or the north pole of the display screen, the extended length of the third straight side C23 will gradually decrease until the third straight side C23 shrinks to a point and coincides with the south pole or the north pole. Therefore, the shape of the display substrate assembled at the south pole or the north pole can be a curvilinear triangle. In addition, the shape of the display substrate assembled at the south pole or the north pole can also be a polygon, that is, the display substrate assembled at the south pole or the north pole is not vertically divided, which can improve the splicing effect at the south pole or the north pole.

[0245] In summary, the embodiments of the present application provide a display substrate. Among them, the first side of the backplane is a curved side, and the second side is a straight side, which can ensure that the display substrate can be flattened for easy production and manufacturing. The third straight side is parallel to the fourth straight side, and both the third curved side and the fourth curved side protrude in a direction away from the center of the backplane, so that the shape of the display substrate can better conform to the geometric characteristics of the spherical surface, thereby reducing the seam during the assembly of the display substrate, and further improving the visual effect of the display screen equipped with the display substrate.

[0246] Optionally, the third curved side C13 and the fourth curved side C14 are symmetrically arranged along the center line C5 of the display substrate 10, and the midpoints of the third straight side C23 and the fourth straight side 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 relatively regular and convenient for manufacturing.

[0247] The embodiments of the present application can establish a coordinate system with the midpoint of the fourth straight side C24 as the origin, and the first direction Y1 and the second direction Y2 can be used as the directions of the two axes of the coordinate system, so as to quickly determine the coordinates of multiple discrete points on the third curved side C13 and the fourth curved side C14. The external dimensions of the third curved side C13 and the fourth curved side C14 can be determined by curve fitting based on the coordinates of these discrete points. Moreover, the more the number of discrete points, the better the fitting effect. Exemplarily, the present application can obtain the coordinates of 50 discrete points.

[0248] The following describes the external dimensions of the display substrate provided by the second exemplary embodiment:

[0249] Optionally, please refer to Figure 15And Figure 16 , Figure 16 is Figure 14 A schematic structural diagram of a display substrate assembled into a display screen. After the display substrate 10 is assembled into the display screen 20 extending in a spherical shape, the plane formed by the third straight edge C23 and the center of the sphere O2 of the display screen 20 is the third plane, and the plane formed by the fourth straight edge C24 and the center of the sphere O2 of the display screen 20 is the fourth plane. The plane formed by any specified line segment C4 parallel to the third straight edge C23 in the display substrate 10 and the center of the sphere O2 of the display screen 20 is the fifth plane, and the two end points of the specified line segment C4 are respectively on the third curved edge C13 and the fourth curved edge C14. The meridian plane corresponding to the meridian line coinciding with the third curved edge C13 in the display screen 20 is the third meridian plane, and the meridian plane corresponding to the meridian line coinciding with the fourth curved edge C14 in the display screen 20 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 the direction 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 meridian line is located.

[0250] The display substrate 10 satisfies:

[0251] L5 = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 );

[0252] L6 = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ4)) 2 );

[0253] M1 = R1 * (γ3 - γ4) / 180° * π;

[0254] L x = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ x )) 2 );

[0255] Among them, 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 extended length of the specified line segment C4. γ x is the angle between the fifth plane and the equatorial plane of the display screen.

[0256] 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 of the specified line segment C4 x are all the external shape characteristics of the display substrate 10 in the flattened state. The included angles γ3, γ4, and γ x and the included angle β are all parameters determined according to the position of the display substrate 10 in the assembled state. Specifically, the display substrate 10 in the assembled state can be in a bent state.

[0257] Based on the radius R1 of the display screen 20 and the range of the size of the display substrate 10 in the first direction Y1, the number of display substrates 10 to be divided in each toroidal surface can be determined, and thus the included angle β can be determined. Exemplarily, when the number of display substrates 10 that can be divided in the toroidal surface near the equator is set to 192, β = 360° / 192 = 1.875°.

[0258] Based on the radius R1 of the display screen 20 and the range of the size of the display substrate 10 in the second direction Y2, the number of toroidal surfaces to be divided in the spherical surface can be determined, and thus the included angles γ3, γ4, and γ corresponding to the display substrate 10 can be determined x .

[0259] Through the above formula, the dimensions of the third straight edge C23 and the fourth straight edge C24 of the backplane 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 can be calculated 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 limits the range of the specified line segment C4 in the second direction Y2. Combining the length M1 of the center line C5 of the display substrate 10 and the length L of a specified line segment C4 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. Moreover, the more data of the calculated length L x of the specified line segment C4, the higher the accuracy of the determined external dimensions of the display substrate 10 can be improved, so as to facilitate production and manufacturing according to the calculated external dimensions.

[0260] Under the influence of factors such as poor manufacturing accuracy and assembly position deviation of the display substrate 10, it is easy to cause interference between the corners of the display substrate 10 and the adjacent display substrates 10 during assembly. Therefore, the embodiment of the present application can modify the display substrate 10 to reduce the interference risk.

[0261] In a possible implementation, the embodiments of the present application can adjust the shapes of the third curved edge C13 and the fourth curved edge C14 of the backplane 11.

[0262] Optionally, please refer to Figure 15 and Figure 16 , it is shown that the display substrate 10 satisfies:

[0263] L x = λ x *(R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ x ))) 2 );

[0264] Wherein, L x is the extended length of the specified line segment C4. λ x is the fifth correction coefficient of the specified line segment C4, and the value range of λ x is: 0.95 to 1. R1 is the radius of the display screen. β is the included angle between the third meridian plane and the fourth meridian plane. γ x is the included angle between the fifth plane and the equatorial plane of the display screen.

[0265] Through the above formula, the extended length L x of any specified line segment C4 in the display substrate 10 can be calculated. Based on the value range of the fifth correction coefficient λ x , it can be known that by setting the fifth correction coefficient λ x to be less than or equal to 1, it can adapt to the situation without interference risk, or, in the case of interference risk, the length L x of the specified line segment C4 can be reduced, so that the third curved edge C13 and the fourth curved edge C14 can be retracted towards the center line C5. And, by setting λ x to be greater than or equal to 0.95, it can ensure that the reduction degree of the specified line segment C4 will not be too large to avoid obvious seams when the display substrate 10 is assembled in the display screen. Therefore, under the adjustment of the fifth correction coefficient λ x , the risk of interference at the corners of the display substrate 10 can be reduced.

[0266] In the established coordinate system, the third straight edge C23 and the fourth straight edge C24 can also be regarded as the specified line segment C4, so the following calculation formula can be used for calculation:

[0267] L5 = λ8 * (R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 ));

[0268] L6 = λ x2*(R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ4)) 2 ));

[0269] Wherein, L5 is the extended length of the third straight side C23, L6 is the extended 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.

[0270] The value ranges of λ8 and λ9 can 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 the display screen.

[0271] It should be noted that when there is a risk of interference, λ x is set to be greater than or equal to 0.95 and less than 1 to achieve the modification of the display substrate 10. When the manufacturing accuracy and assembly accuracy of the display substrate 10 meet the requirements, the display substrate 10 is not likely to interfere, and the fifth correction coefficient λ x can also be taken as 1, that is, the shapes of the third curved side C13 and the fourth curved side C14 can be not adjusted. The setting of the value ranges 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 and will not be elaborated here.

[0272] Optionally, for two display substrates 10 adjacent in the meridional direction of the display screen 20, the fifth correction coefficient λ x corresponding to the display substrate 10 closer to the equatorial plane of the display screen 10 is greater than the fifth correction coefficient λ x corresponding to the display substrate 10 farther from the equatorial plane of the display screen 10. Exemplarily, 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 to 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 to 0.98. This is more in line with the geometric characteristics of the spherical surface, thereby improving the splicing effect of the display substrate 10. Similarly, the eighth correction coefficient λ8 and the ninth correction coefficient λ9 can also have the same trend as the fifth correction coefficient λ x and will not be elaborated here.

[0273] In another possible implementation manner, the embodiment of the present application can chamfer the corners of the backplane 11.

[0274] Please refer toFigure 17 , Figure 17 FIG. Figure 17 is a schematic structural view of a backplane in another display substrate provided by an embodiment of the present application. The shape of the backplane 11 is a curvilinear trapezoid, and at least one corner of the backplane 11 has a chamfer, and the chamfer edge of the chamfer is a straight edge or a curved edge. By providing the chamfer, the protrusion degree of the corner of the display substrate 10 in the first direction Y1 can also be reduced, so that the risk of interference at the corner of the display substrate 10 can be reduced.

[0275] It should be noted that, Figure 17 the chamfer between the third straight edge C23 and the third curved edge C13 is taken as an example, but the embodiments of the present application are not limited thereto. Chamfers can be provided at each corner of the backplane 11, which can further reduce the risk of interference.

[0276] Optionally, there is a chamfer between the third straight edge C23 and the third curved edge C13, and / or there is a chamfer between the third straight edge C23 and the fourth curved edge C14. That is, for at least one of the two corners on the side close to the shorter third straight edge C23, providing a chamfer can facilitate reducing the manufacturing difficulty compared to the other two corners.

[0277] In addition, Figure 17 only the case where the chamfer edge C3 is a straight edge is shown as an example, but the embodiments of the present application are not limited thereto. When the chamfer edge C3 is a curved edge, the chamfer edge C3 protrudes outward from the backplane 11, so that the protrusion degree of the corner can be reduced.

[0278] Optionally, please refer to Figure 18 , Figure 18 which is Figure 17 a partial enlarged view of the backplane provided at Q5. The chamfer between the third straight edge C23 and the third curved edge C13 is the second chamfer. The intersection point of the chamfer edge C3 of the second chamfer and the third curved edge C13 is the fourth intersection point E4, the intersection point of the extension line of the third straight edge C23 and the extension line of the third curved edge C13 is the fifth intersection point E5, and the intersection point of the chamfer edge C3 of the second chamfer and the third straight edge C23 is the sixth intersection point E6.

[0279] Among them, the third distance B3 between the fifth intersection point E5 and the fourth intersection point E4 is greater than the fourth distance B4 between the fifth intersection point E5 and the sixth intersection point E6. Here, for the display substrate 10 provided by the first exemplary embodiment, it is necessary to set the second distance B2 to be relatively large to ensure that the interference risk in the first direction Y1 can be reduced. Therefore, setting the third distance B3 to be greater than the fourth distance B4 can reduce the modification difficulty and avoid the problem of obvious seam caused by setting the fourth distance B4 too large.

[0280] Optionally, the ratio of the third distance B3 to the fourth distance B4 is in the 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 interference risk.

[0281] Optionally, the chamfer between the third straight edge C23 and the third curved edge C13 is the second chamfer. The intersection point of the chamfer edge C3 of the second chamfer and the third curved edge C13 is the fourth intersection point E4, and the intersection point of the extension line of the third straight edge C23 and the extension line of the third curved edge C13 is the fifth intersection point E5.

[0282] The chamfer edge C3 of the second chamfer satisfies:

[0283] B4 ≤ 0.8 * P s ;

[0284] wherein, B4 is the distance between the fifth intersection point E5 and the sixth intersection point E6. P s is the minimum value among the row spacings between any two adjacent light-emitting units 12.

[0285] The above formula determines the setting range of the second chamfer through the row spacing between two adjacent light-emitting units. On the one hand, by setting the fourth distance B4 within this range, it is convenient to assemble the display substrate 10 in a display screen extending in a spherical shape. On the other hand, it can also avoid the problem that there is no space for some light-emitting units 12 in the area where the second chamfer is located, so that the influence of the second chamfer on the arrangement of the light-emitting units 12 is small. And 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.

[0286] In the embodiment of the present application, the above two ways of modifying the display substrate 10 can be combined, that is, the chamfer can be set at the corner of the backplane 11 while adjusting the shapes of the third curved edge C13 and the fourth curved edge C14 of the backplane 11. Among them, the extended length L x of the specified line segment C4 is applicable to the area other than the chamfer. Correspondingly, the relative magnitude relationship of the fifth correction coefficient λ x in different display substrates 10 is applicable to the area other than the chamfer.

[0287] Next, the arrangement of the light-emitting units in the display substrate provided by the second exemplary embodiment will be described:

[0288] Optionally, please refer to Figure 15, a plurality of light-emitting units 12 are arranged in multiple rows along the second direction Y2. The multiple rows of light-emitting units 12 respectively correspond to multiple specified line segments C4. The centers of the multiple light-emitting units 12 in the same row of light-emitting units 12 are all located on a corresponding specified line segment C4. The two end points of the specified line segment C4 are respectively on the third curved side C13 and the fourth curved side C14, and the specified line segment C4 is parallel to the third straight side C23.

[0289] Since the extension lengths of the specified line segments C4 corresponding to different rows of light-emitting units 12 are different, the numbers of light-emitting units 12 in different rows are also different, so that the difference in the distance between the centers of any two adjacent light-emitting units 12 in different rows can be reduced. Exemplarily, along the direction from the third straight side C23 to the fourth straight side C24, the number of light-emitting units 12 in each row gradually increases.

[0290] 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.

[0291] Optionally, please refer to Figure 15 and Figure 19 , Figure 19 is Figure 15 a partial enlarged view of the provided display substrate at Q4. The third curved side C13 and the fourth curved side C14 are symmetrically arranged along the center line of the display substrate 10. The multiple rows of light-emitting units 12 satisfy:

[0292] S1 = λ6 * 0.5 * P C ;

[0293] wherein, S1 is the minimum distance between the specified line segment corresponding to the row of light-emitting units 12 closest to the third straight side C23 and the third straight side C23. λ6 is the sixth correction coefficient, and the value range of λ6 is: 0.5 to 1.0. P C is the row spacing between two adjacent rows of light-emitting units 12.

[0294] Based on the value range of the sixth correction coefficient λ6, it can be known that by setting the sixth correction coefficient λ6 to be less than or equal to 1, it is possible to, or, in the case of the existence of a seam, reduce the distance S1, so that the possible seam between adjacent display substrates 10 in the second direction Y2 in the display screen can be compensated, and thus the splicing effect of multiple display substrates 10 in the display screen can be improved. By setting λ3 to be greater than or equal to 0.5, it can be ensured that the distance between the row of light-emitting units 12 closest to the third straight edge C23 and the third straight edge C23 is not too close, so as to avoid insufficient setting space for the light-emitting units 12 and the corresponding circuit structures. And, if dark seams are likely to appear between the display substrates 10, the sixth correction coefficient λ6 needs to take a smaller value. For example, the value range of λ6 can be: 0.5 to 0.8.

[0295] In the embodiment of the present application, the row pitch P between adjacent rows of light-emitting units 12 C can be determined according to the target pitch P b which can be the pitch between two adjacent light-emitting units 12 specified in advance in the first direction Y1 or the second direction Y2. The row pitch P b satisfies: C

[0296] P C =M 1 / [M1 / P b ;

[0297] wherein, M1 is the length of the center line C5 of the display substrate 10. Since it cannot be ensured that the length M1 of the center line C5 of the display substrate 10 is an integer multiple of the target pitch P b in the above formula, by taking the integer part of the ratio of the length M1 of the center line C5 of the display substrate 10 to the target pitch P b to determine the number of rows of the light-emitting units 12, the accuracy of the determined row pitch P C is relatively high. Here, the way of taking the integer part can include any one of rounding up, rounding down, and rounding to the nearest integer.

[0298] Optionally, any row of light-emitting units 12 satisfies:

[0299] S n =λ7*0.5*P p ;

[0300] wherein, 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 to 1.0, and P p is the distance between the centers of two adjacent light-emitting units 12 in the nth row of light-emitting units 12.​

[0301] Based on the value range of the seventh correction coefficient λ7, it can be known that by setting the seventh correction coefficient λ7, the distance S can be reduced n , so as to compensate for the possible seam between adjacent display substrates 10 in the first direction Y1 on the display screen, and further improve the splicing effect of multiple display substrates 10 on the display screen. And if dark seams are likely to appear between the display substrates 10, the seventh correction coefficient λ7 needs to be taken as a smaller value. For example, the value range of λ7 can be: 0.5~0.8.

[0302] 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 p can be determined according to the target pitch P b , and the target pitch P b can be the pitch between two adjacent light-emitting units 12 specified in advance in the first direction Y1 or the second direction Y2. The distance P p satisfies:

[0303] P P =L xn / [M1 / P b ;

[0304] wherein, L xn is the extended length of the specified line segment C4 corresponding to the nth row of light-emitting units 12. Since it cannot be ensured that the extended length L xn of the specified line segment C4 corresponding to the nth row of light-emitting units 12 is an integer multiple of the target pitch P b , in the above formula, by taking the integer of the ratio of the extended length L xn of the specified line segment C4 to the target pitch P b , the number of light-emitting units 12 in the nth row of light-emitting units 12 is determined. In this way, the determined distance P p is relatively accurate. Here, the rounding method can include any one of rounding up, rounding down, and rounding.

[0305] It should be noted that since the extended lengths L xn of the specified line segments C4 corresponding to each row of light-emitting units 12 are different, the number of light-emitting units 12 in each row of light-emitting units 12 and / or the distance P p between the centers of adjacent light-emitting units 12 are different.

[0306] Optionally, please refer to Figure 20 and Figure 21 , Figure 20 is Figure 17 another partial enlarged view of the backplane provided at Q5, Figure 21 is Figure 17Another partial enlarged view of the backplane provided at Q5. The backplane 11 has a main display area 111 and a second chamfer display area 113. The second chamfer display area 113 is closer to the second chamfer than the main display area 111. Exemplarily, the main display area 111 can be the area outside the second chamfer display area 113. In the case where chamfers are also provided at other corners, the main display area 111 should exclude the areas where other chamfers are located.

[0307] In the first direction Y1, the distance F6 between the centers of two adjacent light-emitting units 12 distributed in the second chamfer display area 113 is less than or equal to the distance F7 between the centers of two adjacent light-emitting units 12 distributed in the main display area 111.

[0308] Among them, please refer to Figure 20 , in the case where the modification of the display substrate 10 is small, for example, when the fourth distance B4 is small, the influence of the second chamfer on the arrangement of the light-emitting units 12 is small. Only the backplane 11 can be modified, and the arrangement positions of the light-emitting units 12 in the second chamfer display area 113 remain unchanged. That is, the distance F6 is set equal to the distance F7. Exemplarily, when B4 ≤ 0.2*P s , the distance F6 is set equal to the distance F7.

[0309] Please refer to Figure 13 , in the case where the modification of the display substrate 10 is large, for example, when the fourth distance B4 is large, the influence of the second chamfer on the arrangement of the light-emitting units 12 is large. The backplane 11 can be modified, and the arrangement positions of the light-emitting units 12 in the second chamfer display area 113 can be adjusted. That is, the distance F6 is set less than the distance F7. Exemplarily, when 0.2*P s ≤ B4 ≤ 0.8*P s , the distance F6 is set less than the distance F7.

[0310] Optionally, please refer to Figure 17 and Figure 20 , in the second chamfer 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 a row of light-emitting units 12 gradually increases along the direction from the third curved edge C13 to the fourth curved edge C14. Exemplarily, 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, in the first direction Y1, the pitch of the light-emitting units 12 in the first chamfer display area 112 can achieve a gradual change effect, so that the display effect transition between the second chamfer display area 113 and the main display area 111 is more natural.

[0311] And / or, the multiple light-emitting units 12 in the second chamfer display area 113 are divided into multiple second light-emitting unit groups 12b. One second light-emitting unit group 12b includes two adjacent light-emitting units 12 arranged in the first direction Y1. For any row of the 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 edge C23 to the fourth straight edge C24. Exemplarily, for the row of the 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 pitch of the light-emitting units 12 in the first chamfer display area 112 can achieve a gradient effect, so that the display effect transition between the first chamfer display area 112 and the main display area 111 is more natural.

[0312] In summary, the embodiment of the present application provides a display substrate. Among them, the first side of the backplane is a curved edge, and the second side is a straight edge, which can ensure that the display substrate can be flattened for easy production and manufacturing. The third straight edge is parallel to the fourth straight edge, and both the third curved edge and the fourth curved edge protrude away from the center of the backplane, so that the shape of the display substrate more conforms to the geometric characteristics of the spherical surface, thereby reducing the seam when assembling the display substrate, and further improving the visual effect of the display screen equipped with the display substrate.

[0313] The embodiment of the present application provides a display module, including: a box body, and at least one display substrate located on one side of the box body. The display substrate is the display substrate provided in any of the above embodiments. Since the display module includes the display substrate provided in the above embodiments, the display module can also have a similar effect, that is, the splicing effect of the display module can be improved.

[0314] In the present application, only one display substrate can be installed on one box body of the display module. Then, the outer shape structure of the installation surface of the box body can be similar to the outer box structure of the display substrate provided in the above embodiments. That is, a pair of opposite sides of the installation surface of the box body are straight edges, and the other pair of opposite sides are curved edges. In addition, multiple display substrates can also be installed on one box body of the display module. Exemplarily, for the display module assembled at the South Pole or the North Pole, the shape of the box body can be circular or polygonal, and multiple display substrates are spliced and installed on the installation surface of the box body.

[0315] Optionally, at least part of the side of the box body facing at least one display substrate is a curved surface. In this case, the backplane in the display substrate has a certain flexibility or toughness. Therefore, when installing the display substrate on one side of the box body, the display substrate can be bent according to the curved surface provided on one side of the box body, so that the display module can be a display module with a curved display surface.

[0316] An embodiment of the present application provides a display screen, including: a plurality of spliced display modules, where the display module is the display module provided in any of the above embodiments, and the display surface of the display screen is a curved surface.

[0317] The display screen can be various display screens extending in a spherical or ellipsoidal shape. For example, a motion simulator display screen, a flight simulation display screen, a vehicle driving simulation display screen, etc. Since the display screen includes the display module provided in the above embodiment, the display screen can also have a similar effect, that is, it can improve the splicing effect of the display screen. In addition, since the display module in the present application can be a display module with a curved display surface, after splicing a plurality of display modules in the display screen, a spherical ultra-large display screen can be obtained.

[0318] Optionally, the display screen extends in a spherical shape. The display surface of the display screen can face the center of the sphere, and the user can observe inside the sphere. The display surface of the display screen can also face outside the sphere, and the user can observe outside the sphere. The splicing effect of the display screen in both cases is good, thereby improving the visual effect of the display screen.

[0319] An embodiment of the present application provides display substrates under two division methods. Correspondingly, the embodiments of the present application respectively provide display screens spliced by the display substrates under these two division methods.

[0320] In the first exemplary embodiment, the first side of each display substrate in the display screen is a straight edge, and the second side is a curved edge. The first side corresponds to the meridian 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.

[0321] After the display substrate is assembled into the display screen, the plane formed by the first curved edge and the center of the sphere of the display screen is the first plane, and the plane formed by the second curved edge and the center of the sphere of the display screen is the second plane. The meridian plane corresponding to the meridian where the first straight edge coincides in the display screen is the first meridian plane, and the meridian plane corresponding to the meridian where the second straight edge coincides in the display screen 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.

[0322] The curvatures of the first curved edge and the second curved edge satisfy:

[0323] K1 = λ1 / (π * cosγ1 * R1 * (β / 360°) / β * sin(2γ1));

[0324] K2 = λ2 / (π * cosγ2 * R1 * (β / 360°) / β * sin(2γ2));

[0325] 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: 1~1.05. γ1 is the angle between the first plane and the equatorial plane of the display screen. R1 is the radius of the spherical surface where 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: 0.95~1. γ2 is the angle between the second plane and the equatorial plane of the display screen.

[0326] 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.

[0327] The first correction coefficient corresponding to the curvature of the first curved edge in the first display substrate is smaller than the first correction coefficient corresponding to the curvature of the first curved edge in the second display substrate.

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

[0329] Optionally, the display substrate satisfies, in a flattened state:

[0330] L1=2π*cosγ1*R1*(β / 360°);

[0331] L2=2π*cosγ2*R1*(β / 360°);

[0332] α=2β*sin(2γ1);

[0333] L3=L4=π*cos(γ2-γ1)*R1*(β / 360°) / β*sin(2γ1);

[0334] Wherein, L1 is the extension 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 display screen. β is the angle between the first meridian plane and the second meridian plane. L2 is the extension 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 extension line of the first straight side and the extension line of the second straight side when the display substrate is flattened. L3 is the extension length of the first straight side. L4 is the extension length of the second straight side.

[0335] 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.

[0336] After the display substrate is assembled into the display screen, the plane formed by any specified line segment parallel to the third straight edge in the display substrate and the center of the sphere of the display screen is the fifth plane, and the two endpoints of the specified line segment are respectively on the third curved edge and the fourth curved edge. The meridian plane corresponding to the meridian line that coincides with the third curved edge in the display screen is the third meridian plane, and the meridian plane corresponding to the meridian line that coincides with the fourth curved edge in the display screen 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.

[0337] The display substrate satisfies:

[0338] L x =λ x *(R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ x )) 2 ));

[0339] Wherein, L x is the extended length of the specified line segment. λ x is the fifth correction coefficient of the specified line segment, and the value range of λ x 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.

[0340] Optionally, after the display substrate is assembled into the display screen, the plane formed by the third straight edge and the center of the sphere of the display screen is the third plane, and the plane formed by the fourth straight edge and the center of the sphere of the display screen is the fourth plane.

[0341] The display substrate satisfies:

[0342] L5 = λ8 * (R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 ));

[0343] L6 = λ9 * (R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ4)) 2 ));

[0344] Wherein, L5 is the extended 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 extended 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.

[0345] Optionally, two adjacent display substrates in the warp direction of the display screen are respectively: the third display substrate and the fourth display substrate, and the third display substrate is closer to the equatorial plane of the display screen than the fourth display substrate.

[0346] The third display substrate and the fourth display substrate satisfy at least one of the following conditions:

[0347] The fifth correction coefficient of the specified line segment in the third display substrate is less than the fifth correction coefficient of the specified line segment in the fourth display substrate.

[0348] The eighth correction coefficient of the third straight edge in the third display substrate is less than the eighth correction coefficient of the third straight edge in the fourth display substrate.

[0349] The ninth correction coefficient of the fourth straight edge in the third display substrate is less than the ninth correction coefficient of the fourth straight edge in the fourth display substrate.

[0350] Optionally, the third curved edge and the fourth curved edge are symmetrically arranged along the center line of the display substrate.

[0351] The display substrate satisfies:

[0352] L5 = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ3)) 2 )

[0353] L6 = R1 * 2 * tan(0.5 * β) * (1 - 0.5 * (cos(90° - 0.5 * γ4)) 2 )

[0354] M1 = R1 * (γ3 - γ4) / 180° * π

[0355] Wherein, L5 is the extended length of the third straight edge. R1 is the radius of the display screen. β is the included angle between the third meridian plane and the fourth meridian plane. γ3 is the included 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 included angle between the fourth plane and the equatorial plane of the display screen.

[0356] In this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0357] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or an intermediate layer may be present. Additionally, it is understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or more than one intermediate layer or element may be present. Further, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or more than one intermediate layer or element may also be present. Like reference numerals throughout the specification indicate like elements.

[0358] In this application, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" means two or more unless otherwise specifically defined.

[0359] The above are only optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A display substrate, characterized in that, include: A back plate, and a plurality of light-emitting units located on one side of the back plate; The back plate comprises: a pair of first edges arranged opposite to each other in a first direction, and a pair of second edges arranged opposite to each other in a second direction; the first edges are straight edges, and the second edges are curved edges; the pair of first edges are respectively a first straight edge and a second straight edge, and the pair of second edges are respectively a first curved edge and a second curved edge; The back plate is in a fan-shaped shape, and at least one corner of the back plate has a chamfer; the chamfer between the first straight line side and the first curved line side is a first chamfer; the intersection of the chamfered side of the first chamfer and the first straight line side is a first intersection, the intersection of the extended line of the first curved line side and the extended line of the first straight line side is a second intersection, and the intersection of the chamfered side of the first chamfer and the first curved line side is a third intersection; wherein a first distance between the second intersection and the first intersection is less than a second distance between the second intersection and the third intersection; 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 in a row closest to the second side 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, and / or, For a row of the light-emitting units closest to the second 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 in the row closest to the first side on the back panel and the first side is less than or equal to half of the distance between the centers of two adjacent light-emitting units in the row.

2. The display substrate according to claim 1, wherein 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 of the arc edge in the first curved edge and the center 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.

3. The display substrate according to claim 2, wherein 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 second straight edge; the first straight edge and the second straight edge are symmetrically arranged along the line axis connecting the centers of the first curved edge and the center of the back panel.

4. The display substrate according to any one of claims 1 to 3, characterized in that The chamfered edge of the chamfer is a straight line edge or a curved line edge.

5. The display substrate according to claim 4, wherein A chamfer is formed between the first curved side and the second straight side.

6. The display substrate according to claim 1, characterized in that, The ratio of the second distance to the first distance is in the range of 5 to 15.

7. The display substrate according to claim 4, wherein The plurality of light emitting units are arranged in a plurality of rows along the second direction; The chamfered edge of the first chamfer satisfies: B1 ≤ 0.8 * P s ; Wherein, B1 is the distance between the first intersection point and the second intersection point; P s is the minimum value among the row spacings between any two adjacent rows of the light-emitting units.

8. The display substrate according to any one of claims 1 to 3, 5 to 7, characterized in that The back panel has a main display area and a first chamfered display area, wherein the first chamfered display area is closer to the first chamfer than the main display area; In the second direction, the distance between the centers of two adjacent light-emitting units distributed in the first chamfer display area is less than the distance between the centers of two adjacent light-emitting units distributed in the main display area.

9. The display substrate according to claim 8, wherein In the first chamfer 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 in the direction from the first curved edge to the second curved edge, and / or The multiple light-emitting units in the first chamfer display area are divided into multiple first light-emitting unit groups. 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 in the direction from the first straight edge to the second straight edge.

10. The display substrate according to any one of claims 1 to 3, 5 to 7, characterized in that The multiple light-emitting units are arranged in multiple rows in the second direction. At least some rows of the light-emitting units respectively correspond to multiple first reference lines. The centers of the multiple light-emitting units in the same row are all located on a corresponding first reference line. The two end points of the first reference line are respectively on the first straight edge and the second straight edge, and the first reference line is an arc. The center of the first reference line is the intersection point of the extension lines of the first straight edge and the second straight edge.

11. The display substrate according to claim 10, wherein The multiple rows of light-emitting units satisfy: D1 = λ3 * 0.5 * P v ; Wherein, D1 is the minimum distance between the first reference line corresponding to a row of the light-emitting units closest to the first curved edge and the first curved edge; λ3 is a third correction coefficient, and the value range of λ3 is: 0.7 to 1.0; P v is the row pitch between two adjacent rows of the light-emitting units.

12. The display substrate according to claim 10, wherein The line connecting the center of the light-emitting unit and the center of the first reference line is the second reference line corresponding to the light-emitting unit. Any row of light-emitting units satisfies: A n = λ4 * 0.5 * P A_n ; Wherein, A n is the included angle between the second reference line corresponding to the light-emitting unit closest to the first straight side among the light-emitting units in the nth row and the first straight side; the λ4 is the fourth correction coefficient, and the value range of the λ4 is: 0.7 to 1.0; the P A_n is the included angle between the second reference lines corresponding to two adjacent light-emitting units among the light-emitting units in the nth row.

13. The display substrate according to claim 12, wherein The two opposite sides of the light-emitting unit in the first direction are both parallel to the second reference line corresponding to the light-emitting unit.

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

15. A display screen, characterized in that, Comprising: Multiple spliced display modules, where the display module is the display module according to claim 14, and the display surface of the display screen is an arc surface.

16. The display screen according to claim 15, characterized in that, The display screen extends in a spherical shape; the first side corresponds to the meridian 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. After the display substrate is assembled into the display screen, the plane formed by the first curved edge and the center of the display screen is the first plane, and the plane formed by the second curved edge and the center of the display screen is the second plane; the meridian plane corresponding to the meridian where the first straight edge coincides in the display screen is the first meridian plane, and the meridian plane corresponding to the meridian where the second straight edge coincides in the display screen 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. The curvatures of the first curved edge and the second curved edge satisfy: K1 = λ1 / (π * cosγ1 * R1 * (β / 360°) / β * sin(2γ1)); K2 = λ2 / (π * cosγ2 * R1 * (β / 360°) / β * sin(2γ2)); 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: 0.95 to 1; γ1 is the angle between the first plane and the equatorial plane of the display screen; R1 is the radius of the sphere where 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: 1 to 1.05; γ2 is the angle between the second plane and the equatorial plane of the display screen.

17. The display screen according to claim 16, wherein Among the two display substrates adjacent in the longitude direction of the display screen, they are respectively: the first display substrate and the second display substrate, and the first display substrate is closer to the equatorial plane of the display screen than the second display substrate; The first correction coefficient corresponding to the curvature of the first curved edge in the first display substrate is greater than the first correction coefficient corresponding to the curvature of the first curved edge in the second display substrate; The second correction coefficient corresponding to the curvature of the second curved edge in the first display substrate is less than the second correction coefficient corresponding to the curvature of the second curved edge in the second display substrate.

18. The display screen according to claim 15, wherein, The display screen extends spherically; 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; After the display substrate is assembled into the display screen, the plane formed by the first curved edge and the center of the sphere of the display screen is the first plane, and the plane formed by the second curved edge and the center of the sphere of the display screen is the second plane; the meridian plane corresponding to the meridian where the first straight edge coincides in the display screen is the first meridian plane, and the meridian plane corresponding to the meridian where the second straight edge coincides in the display screen 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; The display substrate in the flattened state satisfies: L1 = 2π * cosγ1 * R1 * (β / 360°); L2 = 2π * cosγ2 * R1 * (β / 360°); α = 2β * sin(2γ1); L3 = L4 = π * cos(γ1 - γ2) * R1 * (β / 360°) / β * sin(2γ1); Wherein, L1 is the extension 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 spherical surface where the display screen is located; β is the angle between the first meridian plane and the second meridian plane; L2 is the extension 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 extension line of the first straight edge and the extension line of the second straight edge of the display substrate in the flattened state; L3 is the extension length of the first straight edge; and L4 is the extension length of the second straight edge.

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