Display substrate and display device

Abstract

The invention provides a display substrate and a display device. The display substrate comprises a plurality of pixel circuits. The pixel circuit comprises a pixel driving circuit and a light-emitting element, and the pixel driving circuit comprises a driving output end; the anode of the light-emitting element comprises an anode main body part and an anode connecting wire which are integrally formed; the anode connecting wire is electrically connected with the anode main body part and the driving output end respectively; the length of the anode connecting line is smaller than or equal to N times of the line width of the anode connecting line, and N is larger than or equal to 1 and smaller than or equal to 5. According to the invention, the length of the anode connecting line integrally formed with the anode main body part is set to be smaller, so that the line breaking risk of the anode connecting line is reduced, the brightness uniformity is improved, and the power consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display substrate and a display device. Background Art

[0002] In the related art, a pixel module may include three pixel circuits: a red pixel circuit, a green pixel circuit and a blue pixel circuit, and the three pixel circuits include light-emitting elements of different colors; the three pixel circuits use the same pixel driving circuit, and the pixel driving circuit includes a driving output end. The driving output ends of the three pixel driving circuits are located at the same height in the Y direction. When the driving output end is connected to the anode connecting line through a via hole, it can be found that the lengths of the anode connecting lines corresponding to pixel circuits of different colors are different, and the length of the anode connecting line corresponding to the pixel circuit far away from the driving output end is longer, which poses risks of broken wires, reduced brightness uniformity, and increased power consumption. Summary of the invention

[0003] The main purpose of the present invention is to provide a display substrate and a display device to solve the problem that the anode connection line corresponding to the pixel circuit far away from the driving output end is long, has the possibility of disconnection and reduced brightness uniformity.

[0004] In one aspect, at least one embodiment of the present invention provides a display substrate, comprising a plurality of pixel circuits; the pixel circuits comprise a pixel driving circuit and a light emitting element, the pixel driving circuit comprises a driving output terminal;

[0005] The anode of the light emitting element comprises an anode main body and an anode connecting wire formed in one piece;

[0006] The anode connecting wire is electrically connected to the anode main body and the driving output terminal respectively;

[0007] The length of the anode connection line is less than or equal to N times the line width of the anode connection line, and N is greater than or equal to 1 and less than or equal to 5.

[0008] Optionally, the pixel driving circuit includes a storage capacitor, the storage capacitor includes a first electrode plate, and the first electrode plate includes a first electrode plate portion;

[0009] The first electrode portion is electrically connected to the anode connection line through a first via hole.

[0010] Optionally, the display substrate described in at least one embodiment of the present invention further includes a substrate; the pixel circuit is arranged on the substrate; the effective light emitting area of ​​the light emitting element is located inside the anode main body;

[0011] An orthographic projection of the first via hole on the substrate does not overlap with an orthographic projection of the anode body on the substrate.

[0012] Optionally, the first electrode portion includes a first electrode portion extending along a first direction; the first direction is an extending direction of a data line electrically connected to the pixel driving circuit;

[0013] The length of the first electrode portion along the first direction is a first length, and the length of the first electrode portion along the second direction is a second length; the first length is greater than the second length;

[0014] The second direction intersects the first direction.

[0015] Optionally, a ratio of the first length to the second length is greater than or equal to 2.

[0016] Optionally, the first electrode portion is electrically connected to the anode connecting line through a first via hole.

[0017] Optionally, the first electrode portion further includes a second electrode portion integrally formed with the first electrode portion;

[0018] The second electrode portion is electrically connected to the anode connection line through a first via hole.

[0019] Optionally, the pixel circuit is disposed on a substrate; the first electrode plate further includes a second electrode plate portion electrically connected to the first electrode plate portion; the storage capacitor further includes a second electrode plate;

[0020] The first electrode portion is formed on a first metal layer, the second electrode portion is formed on a second metal layer, and the second electrode is formed on a third metal layer;

[0021] The second metal layer, the third metal layer and the first metal layer are arranged in a direction away from the substrate;

[0022] The orthographic projection of the first electrode portion on the substrate, the orthographic projection of the second electrode portion on the substrate, and the orthographic projection of the second electrode portion on the substrate at least partially overlap.

[0023] Optionally, the pixel driving circuit includes a driving transistor;

[0024] The driving transistor includes a gate, a first electrode and a second electrode, wherein the first electrode includes a first electrode portion and a second electrode portion electrically connected to each other;

[0025] The first electrode portion and the second electrode are formed on the first metal layer, and the second electrode portion is formed on the second metal layer.

[0026] Optionally, the pixel driving circuit includes a driving transistor;

[0027] The driving transistor includes a gate, a first electrode and a second electrode, the first electrode includes a first electrode portion and a second electrode portion electrically connected to each other; the second electrode includes a third electrode portion and a fourth electrode portion electrically connected to each other;

[0028] The first electrode portion and the third electrode portion are formed in a first metal layer, and the second electrode portion and the fourth electrode portion are formed in a second metal layer.

[0029] Optionally, the pixel driving circuit further includes a driving circuit, a first light emitting control circuit and a first initialization circuit;

[0030] The control end of the driving circuit is electrically connected to the first node, the first end of the driving circuit is electrically connected to the second node, the second end of the driving circuit is electrically connected to the third node, and the driving circuit is used to generate a driving current under the control of the potential of the first node;

[0031] The first light-emitting control circuit is electrically connected to the light-emitting control line, the second node and the driving output end respectively, and is used to control the connection or disconnection between the second node and the driving output end under the control of the light-emitting control signal provided by the light-emitting control line;

[0032] The first initialization circuit is electrically connected to the reset control line, the initial voltage line and the driving output terminal respectively, and is used to write the initial voltage provided by the initial voltage line into the driving output terminal under the control of the reset control signal provided by the reset control line;

[0033] The driving output terminal is electrically connected to the anode of the light emitting element.

[0034] Optionally, the display substrate includes a first pixel circuit, a second pixel circuit and a third pixel circuit;

[0035] The light emitting element included in the first pixel circuit is a red light emitting element, the light emitting element included in the second pixel circuit is a green light emitting element, and the light emitting element included in the third pixel circuit is a blue light emitting element; the ratio of the length of the anode connection line included in the red light emitting element to the length of the anode connection line included in the green light emitting element is greater than 1 and less than 2;

[0036] The ratio of the length of the anode connection line included in the blue light emitting element to the length of the anode connection line included in the green light emitting element is greater than 1 and less than 2;

[0037] A ratio of a length of an anode connection line included in the red light emitting element to a length of an anode connection line included in the blue light emitting element is greater than 0.75 and less than 1.25.

[0038] Optionally, the driving circuit includes a driving transistor, the first light emitting control circuit includes a first transistor, and the first initialization circuit includes a second transistor;

[0039] The gate of the driving transistor is electrically connected to the first node;

[0040] The first electrode of the driving transistor is electrically connected to the second node, and the second electrode of the driving transistor is electrically connected to the third node; or the first electrode of the driving circuit is electrically connected to the third node, and the second electrode of the driving transistor is electrically connected to the second node;

[0041] The gate of the first transistor is electrically connected to the light emitting control line, the first electrode of the first transistor is electrically connected to the second node, and the second electrode of the first transistor is electrically connected to the driving output terminal;

[0042] The gate of the second transistor is electrically connected to the reset control line, the first electrode of the second transistor is electrically connected to the initial voltage line, and the second electrode of the second transistor is electrically connected to the driving output terminal;

[0043] The second plate of the storage capacitor is electrically connected to the first node, and the first plate of the storage capacitor is electrically connected to the anode of the light emitting element.

[0044] Optionally, the display substrate described in at least one embodiment of the present invention includes a pixel module, and the pixel module includes a first pixel circuit, a second pixel circuit and a third pixel circuit;

[0045] The light-emitting element included in the first pixel circuit is a first light-emitting element, the light-emitting element included in the second pixel circuit is a second light-emitting element, and the light-emitting element included in the third pixel circuit is a third light-emitting element;

[0046] The anode of the second light emitting element and the anode of the third light emitting element are arranged along a first direction;

[0047] The anode of the first light emitting element and the anode of the second light emitting element are arranged along a third direction;

[0048] The first direction intersects the third direction;

[0049] The first direction is an extending direction of a data line electrically connected to the pixel module.

[0050] Optionally, the first light-emitting element is a blue light-emitting element, the second light-emitting element is a green light-emitting element, and the third light-emitting element is a red light-emitting element; the first light-emitting element includes a first light-emitting material pattern, the second light-emitting element includes a second light-emitting material pattern, and the third light-emitting element includes a third light-emitting material pattern;

[0051] The first light-emitting material pattern is larger than an area of ​​the second light-emitting material layer, and an area of ​​the first light-emitting material pattern is larger than an area of ​​the third light-emitting material pattern.

[0052] In a second aspect, an embodiment of the present invention provides a display device, comprising the above-mentioned display substrate.

[0053] In the display substrate and the display device described in the embodiments of the present invention, the length of the anode connecting line integrally formed with the anode main body is set to be smaller, that is, the length of the anode connecting line is less than or equal to N times the line width of the anode connecting line, so as to reduce the risk of breaking of the anode connecting line, improve brightness uniformity, and reduce power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is a structural diagram of at least one embodiment of a pixel circuit in the display substrate of the present invention;

[0055] Figure 2 is a circuit diagram of at least one embodiment of the pixel circuit;

[0056] Figure 3 yes Figure 2 An operation timing diagram of at least one embodiment of the pixel circuit shown;

[0057] Figure 4A is a structural diagram of a display substrate according to at least one embodiment of the present invention;

[0058] Figure 4B yes Figure 4A Schematic diagram of the anode layer in FIG.

[0059] Figure 4C yes Figure 4A A schematic diagram of a light-emitting material layer in FIG.

[0060] Figure 5 and Figure 6 is Figure 4A A stacking diagram of a source-drain metal layer, an anode layer and a light-emitting material layer in at least one embodiment of the display substrate shown;

[0061] Figure 7 and Figure 8 is a cross-sectional view of a display substrate according to at least one embodiment of the present invention;

[0062] Fig.9A , Fig. 9B is a cross-sectional view of a first storage capacitor C11;

[0063] Fig. 10A is a structural diagram of a display substrate according to at least one embodiment of the present invention;

[0064] Fig. 10B yes Fig. 10A Schematic diagram of the anode layer in FIG.

[0065] Fig. 10C yes Fig. 10A A schematic diagram of a light-emitting material layer in FIG.

[0066] Fig.11 It is a schematic diagram of the arrangement of the first light-emitting element, the second light-emitting element and the third light-emitting element. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] The transistors used in all embodiments of the present invention may be thin film transistors or field effect transistors or other devices with the same characteristics. In the embodiments of the present invention, to distinguish the two electrodes of the transistor except the gate, one electrode is called the first electrode and the other electrode is called the second electrode.

[0069] In actual operation, when the transistor is a thin film transistor or a field effect transistor, the first electrode may be a drain electrode, and the second electrode may be a source electrode; or, the first electrode may be a source electrode, and the second electrode may be a drain electrode.

[0070] The display substrate described in the embodiment of the present invention includes a plurality of pixel circuits; the pixel circuits include a pixel driving circuit and a light-emitting element, and the pixel driving circuit includes a driving output terminal;

[0071] The anode of the light emitting element comprises an anode main body and an anode connecting wire formed in one piece;

[0072] The anode connecting wire is electrically connected to the anode main body and the driving output terminal respectively;

[0073] The length of the anode connection line is less than or equal to N times the line width of the anode connection line, and N is greater than or equal to 1 and less than or equal to 5.

[0074] In at least one embodiment of the present invention, N may be greater than or equal to 1 and less than or equal to 5; more specifically, N may be greater than or equal to 1 and less than or equal to 3.5; for example, N may be equal to 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5 or 5.

[0075] In the related art, a pixel module may include three pixel circuits: a red pixel circuit, a green pixel circuit and a blue pixel circuit, and the three pixel circuits include light-emitting elements of different colors; the three pixel circuits use the same pixel driving circuit, and the pixel driving circuit includes a driving output end. The driving output ends of the three pixel driving circuits are located at the same height in the Y direction. When the driving output end is connected to the anode connecting line through a via hole, it can be found that the lengths of the anode connecting lines corresponding to pixel circuits of different colors are different, and the length of the anode connecting line corresponding to the pixel circuit far away from the driving output end is longer, which poses risks of broken wires, reduced brightness uniformity, and increased power consumption.

[0076] Based on this, in the display substrate described in the embodiment of the present invention, the length of the anode connecting line integrally formed with the anode main body is set to be smaller, that is, the length of the anode connecting line is less than or equal to N times the line width of the anode connecting line, so as to reduce the risk of breaking of the anode connecting line, improve brightness uniformity, and reduce power consumption.

[0077] In at least one embodiment of the present invention, the display substrate may include a first pixel circuit, a second pixel circuit, and a third pixel circuit;

[0078] The light emitting element included in the first pixel circuit is a red light emitting element, the light emitting element included in the second pixel circuit is a green light emitting element, and the light emitting element included in the third pixel circuit is a blue light emitting element; the ratio of the length of the anode connection line included in the red light emitting element to the length of the anode connection line included in the green light emitting element is greater than 1 and less than 2;

[0079] The ratio of the length of the anode connection line included in the blue light emitting element to the length of the anode connection line included in the green light emitting element is greater than 1 and less than 2;

[0080] A ratio of a length of an anode connection line included in the red light emitting element to a length of an anode connection line included in the blue light emitting element is greater than 0.75 and less than 1.25.

[0081] In at least one embodiment of the present invention, the effective light emitting area of ​​the light emitting element may be located inside the anode body.

[0082] In at least one embodiment of the present invention, the pixel driving circuit includes a storage capacitor, the storage capacitor includes a first plate, and the first plate includes a first plate portion;

[0083] The first electrode portion is electrically connected to the anode connection line through a first via hole.

[0084] In a specific implementation, the pixel driving circuit may include a storage capacitor, and the first plate in the storage capacitor includes a first plate portion electrically connected to the anode connecting line through a first via hole; the first plate portion may be formed in a source-drain metal layer, and the anode may be formed in an anode layer.

[0085] The display substrate described in at least one embodiment of the present invention further comprises a substrate; the pixel circuit is disposed on the substrate; the effective light emitting area of ​​the light emitting element is located inside the anode main body;

[0086] An orthographic projection of the first via hole on the substrate does not overlap with an orthographic projection of the anode body on the substrate.

[0087] In a specific implementation, the first via hole is located at the periphery of the light-emitting area to ensure that the light-emitting area is flat and improve the light-emitting efficiency.

[0088] In at least one embodiment of the present invention, the first electrode portion includes a first electrode portion extending along a first direction; the first direction is an extending direction of a data line electrically connected to the pixel driving circuit;

[0089] The length of the first electrode portion along the first direction is a first length, and the length of the first electrode portion along the second direction is a second length; the first length is greater than the second length;

[0090] The second direction intersects the first direction.

[0091] In a specific implementation, the first electrode portion may include a first electrode portion, and the first electrode portion may extend along a first direction, and the first direction may be a Y direction, and the first direction may be an extension direction of a data line; when the width of the pixel circuit in the X direction is small, the length of the first electrode portion along the first direction may be set to be longer to increase the area of ​​the first electrode portion, so as to facilitate maintaining the potential of the control end of the driving circuit.

[0092] Optionally, a ratio of the first length to the second length is greater than or equal to 2.

[0093] In at least one embodiment of the present invention, the first electrode portion is electrically connected to the anode connection line through a first via hole.

[0094] In a specific implementation, the first electrode plate portion in the first electrode plate part may be electrically connected to the anode connection line through a first via hole.

[0095] In at least one embodiment of the present invention, the first electrode portion further includes a second electrode portion integrally formed with the first electrode portion;

[0096] The second electrode portion is electrically connected to the anode connection line through a first via hole.

[0097] In a specific implementation, the first electrode plate portion may include a second electrode plate portion, the first electrode plate portion and the second electrode plate portion are integrally formed, and the second electrode plate portion may be electrically connected to the anode connection line through a first via hole.

[0098] In at least one embodiment of the present invention, the pixel circuit is disposed on a substrate; the first electrode plate further includes a second electrode plate portion electrically connected to the first electrode plate portion; the storage capacitor further includes a second electrode plate;

[0099] The first electrode portion is formed on a first metal layer, the second electrode portion is formed on a second metal layer, and the second electrode is formed on a third metal layer;

[0100] The second metal layer, the third metal layer and the first metal layer are arranged in a direction away from the substrate;

[0101] The orthographic projection of the first electrode portion on the substrate, the orthographic projection of the second electrode portion on the substrate, and the orthographic projection of the second electrode portion on the substrate at least partially overlap.

[0102] In a specific implementation, the first electrode plate of the storage capacitor can be set to include a first electrode plate portion and a second electrode plate portion that are electrically connected to each other, and the second electrode plate of the storage capacitor can be set between the first electrode plate portion and the second electrode plate portion to increase the facing area of ​​the first electrode plate and the second electrode plate, thereby improving the potential maintenance effect of the storage capacitor.

[0103] Optionally, the first metal layer may be a source-drain metal layer, the second metal layer may be a light-shielding metal layer, and the third metal layer may be a gate metal layer.

[0104] In at least one embodiment of the present invention, the pixel driving circuit includes a driving transistor;

[0105] The driving transistor includes a gate, a first electrode and a second electrode, wherein the first electrode includes a first electrode portion and a second electrode portion electrically connected to each other;

[0106] The first electrode portion and the second electrode are formed on the first metal layer, and the second electrode portion is formed on the second metal layer.

[0107] In a specific implementation, the first electrode can be set to include a first electrode portion and a second electrode portion, and the first electrode portion and the second electrode portion are arranged in different layers and are electrically connected to each other; the driving transistor is set to a transistor with a Bottom Source structure so that the driving transistor has higher stability.

[0108] In at least one embodiment of the present invention, the pixel driving circuit includes a driving transistor;

[0109] The driving transistor includes a gate, a first electrode and a second electrode, the first electrode includes a first electrode portion and a second electrode portion electrically connected to each other; the second electrode includes a third electrode portion and a fourth electrode portion electrically connected to each other;

[0110] The first electrode portion and the third electrode portion are formed in a first metal layer, and the second electrode portion and the fourth electrode portion are formed in a second metal layer.

[0111] In a specific implementation, the first electrode can be set to include a first electrode portion and a second electrode portion, and the second electrode can be set to include a third electrode portion and a fourth electrode portion. The first electrode portion and the second electrode portion are arranged in different layers and are electrically connected to each other, and the third electrode portion and the fourth electrode portion are arranged in different layers and are electrically connected to each other; the driving transistor is set to a transistor with a Bottom Source structure so that the driving transistor has higher stability.

[0112] Optionally, the pixel driving circuit further includes a driving circuit, a first light emitting control circuit and a first initialization circuit;

[0113] The control end of the driving circuit is electrically connected to the first node, the first end of the driving circuit is electrically connected to the second node, the second end of the driving circuit is electrically connected to the third node, and the driving circuit is used to generate a driving current under the control of the potential of the first node;

[0114] The first light-emitting control circuit is electrically connected to the light-emitting control line, the second node and the driving output end respectively, and is used to control the connection or disconnection between the second node and the driving output end under the control of the light-emitting control signal provided by the light-emitting control line;

[0115] The first initialization circuit is electrically connected to the reset control line, the initial voltage line and the driving output terminal respectively, and is used to write the initial voltage provided by the initial voltage line into the driving output terminal under the control of the reset control signal provided by the reset control line;

[0116] The driving output terminal is electrically connected to the anode of the light emitting element, and the cathode of the light emitting element is electrically connected to the low voltage terminal.

[0117] In a specific implementation, the pixel driving circuit may include a driving circuit, a first light-emitting control circuit and a first initialization circuit. The driving circuit generates a driving current under the control of the potential of the first node; the first light-emitting control circuit controls the connection or disconnection between the second node and the driving output terminal under the control of a light-emitting control signal; and the first initialization circuit writes an initial voltage to the driving output terminal under the control of a reset control signal.

[0118] Optionally, the driving circuit includes a driving transistor, the first light emitting control circuit includes a first transistor, and the first initialization circuit includes a second transistor;

[0119] The gate of the driving transistor is electrically connected to the first node;

[0120] The first electrode of the driving transistor is electrically connected to the second node, and the second electrode of the driving transistor is electrically connected to the third node; or the first electrode of the driving circuit is electrically connected to the third node, and the second electrode of the driving transistor is electrically connected to the second node;

[0121] The gate of the first transistor is electrically connected to the light emitting control line, the first electrode of the first transistor is electrically connected to the second node, and the second electrode of the first transistor is electrically connected to the driving output terminal;

[0122] The gate of the second transistor is electrically connected to the reset control line, the first electrode of the second transistor is electrically connected to the initial voltage line, and the second electrode of the second transistor is electrically connected to the driving output terminal;

[0123] The second plate of the storage capacitor is electrically connected to the first node, and the first plate of the storage capacitor is electrically connected to the anode of the light emitting element.

[0124] like Figure 1 As shown, at least one embodiment of the pixel driving circuit may include a light emitting element E1, a driving circuit 10, a first light emitting control circuit 11, a first initialization circuit 12, a second light emitting control circuit 13, a compensation control circuit 14, a data writing circuit 15, a second initialization circuit 16 and an energy storage circuit 17;

[0125] The control end of the driving circuit 10 is electrically connected to the first node N1, the first end of the driving circuit 10 is electrically connected to the second node N2, the second end of the driving circuit 10 is electrically connected to the third node N3, and the driving circuit 10 is used to generate a driving current under the control of the potential of the first node N1;

[0126] The first light emitting control circuit 11 is electrically connected to the light emitting control line EM, the second node N2 and the driving output terminal DT respectively, and is used to control the connection or disconnection between the second node N2 and the driving output terminal DT under the control of the light emitting control signal provided by the light emitting control line EM;

[0127] The first initialization circuit 12 is electrically connected to the reset control line Rst, the initial voltage line I0 and the driving output terminal DT respectively, and is used to write the initial voltage Vinit provided by the initial voltage line I0 into the driving output terminal DT under the control of the reset control signal provided by the reset control line Rst;

[0128] The driving output terminal DT is electrically connected to the anode of the light emitting element E1, and the cathode of the light emitting element E1 is electrically connected to the low voltage terminal ELVSS;

[0129] The second light emitting control circuit 13 is electrically connected to the light emitting control line EM, the power supply voltage terminal ELVDD and the third node N3 respectively, and is used to control the connection or disconnection between the power supply voltage terminal ELVDD and the third node N3 under the control of the light emitting control signal;

[0130] The compensation control circuit 14 is electrically connected to the scan line GT, the first node N1 and the third node N3 respectively, and is used to control the connection or disconnection between the first node N1 and the third node N3 under the control of the scan signal provided by the scan line GT;

[0131] The data writing circuit 15 is electrically connected to the scan line GT, the data line DL and the second node N2 respectively, and is used to write the data voltage provided by the data line DL into the second node N2 under the control of the scan signal;

[0132] The second initialization circuit 16 is electrically connected to the initial control line GL, the power supply voltage terminal ELVDD and the first node N1 respectively, and is used to control the connection or disconnection between the power supply voltage terminal ELVDD and the first node N1 under the control of the initial control signal provided by the initial control line GL;

[0133] The energy storage circuit 17 is electrically connected to the first node N1 and the anode of the light emitting element E1 respectively, and is used for storing electrical energy.

[0134] like Figure 2 As shown, in Figure 1 On the basis of at least one embodiment of the pixel driving circuit shown, the light emitting element is an organic light emitting diode O1; the energy storage circuit includes a storage capacitor C1;

[0135] The driving circuit includes a driving transistor T0, the first light emitting control circuit includes a first transistor T1, and the first initialization circuit includes a second transistor T2;

[0136] The gate of the driving transistor T0 is electrically connected to the first node N1;

[0137] The first electrode of the driving transistor T0 is electrically connected to the second node N2, and the second electrode of the driving transistor T0 is electrically connected to the third node N3;

[0138] The gate of the first transistor T1 is electrically connected to the light emitting control line EM, the first electrode of the first transistor T1 is electrically connected to the second node N2, and the second electrode of the first transistor T1 is electrically connected to the driving output terminal DT; DT is electrically connected to the anode of O1, and the cathode of O1 is electrically connected to the low voltage terminal ELVSS;

[0139] The gate of the second transistor T2 is electrically connected to the reset control line Rst, the first electrode of the second transistor T2 is electrically connected to the initial voltage line I0, and the second electrode of the second transistor T2 is electrically connected to the driving output terminal DT;

[0140] The second plate of the storage capacitor C1 is electrically connected to the first node N1, and the first plate of the storage capacitor C1 is electrically connected to the anode of O1;

[0141] The second light emitting control circuit includes a third transistor T3, the compensation control circuit includes a fourth transistor T4, the data writing circuit includes a fifth transistor T5, and the second initialization circuit includes a sixth transistor T6;

[0142] The gate of T3 is electrically connected to the light emitting control line EM, the first electrode of T3 is electrically connected to the power supply voltage terminal ELVDD, and the second electrode of T3 is electrically connected to the third node N3 of T0;

[0143] The gate of T4 is electrically connected to the scan line GT, the first electrode of T4 is electrically connected to the first node N1, and the second electrode of T1 is electrically connected to the third node N3;

[0144] The gate of T5 is electrically connected to the scan line GT, the first electrode of T5 is electrically connected to the data line DL, and the second electrode of T5 is electrically connected to the second node N2;

[0145] A gate electrode of T6 is electrically connected to the initial control line GL, a first electrode of T6 is electrically connected to the power supply voltage terminal ELVDD, and a second electrode of T6 is electrically connected to the first node N1.

[0146] Figure 3 yes Figure 2FIG. 1 is a timing diagram of an operation of at least one embodiment of a pixel driving circuit shown in FIG.

[0147] like Figure 4A As shown, the anode body portion of the anode of the first organic light emitting diode is labeled A1, the anode body portion of the anode of the second organic light emitting diode is labeled A2, and the anode body portion of the anode of the third organic light emitting diode is labeled A3;

[0148] The first organic light emitting diode is a blue OLED (organic light emitting diode), the second organic light emitting diode is a green OLED, and the third organic light emitting diode is a red OLED;

[0149] exist Figure 4A Among them, the line labeled EM is the light-emitting control line, the line labeled Rst is the reset control line, and the line labeled I0 is the initial voltage line;

[0150] exist Figure 4A , the capacitor labeled C11 is the first storage capacitor, the capacitor labeled C12 is the second storage capacitor, and the capacitor labeled C13 is the third storage capacitor;

[0151] The first transistor is labeled T11, and the first second transistor is labeled T12;

[0152] The one labeled T21 is the second first transistor, and the one labeled T22 is the second second transistor;

[0153] The transistor labeled T31 is the third first transistor, and the transistor labeled T32 is the third second transistor;

[0154] The gate of T11, the gate of T21 and the gate of T31 are electrically connected to EM;

[0155] The gate of T12, the gate of T22 and the gate of T32 are electrically connected to Rst;

[0156] The first electrode plate of C11 is electrically connected to the first anode connection line L1 through the first first via hole H11;

[0157] The first electrode plate of C21 is electrically connected to the second anode connection line L2 through the second first via hole H21;

[0158] The first electrode plate of C21 is electrically connected to the third anode connection line L3 through the third first via hole H31.

[0159] like Figure 4A As shown, the display substrate according to at least one embodiment of the present invention further includes a first light-emitting material pattern F1, a second light-emitting material pattern F2 and a third light-emitting material pattern F3;

[0160] The orthographic projection of A1 on the base covers the orthographic projection of F1 on the base;

[0161] The orthographic projection of A2 on the base covers the orthographic projection of F2 on the base;

[0162] The orthographic projection of A3 on the base covers the orthographic projection of F3 on the base.

[0163] exist Figure 4A In the figure, the one labeled H2 is the second via hole, and the one labeled H3 is the third via hole.

[0164] Figure 4B yes Figure 4A Schematic diagram of the anode layer in Figure 4C yes Figure 4A Schematic diagram of the light-emitting material layer in FIG.

[0165] Figure 5 yes Figure 4A A stacking diagram of a source / drain metal layer, an anode layer, and a light-emitting material layer in at least one embodiment of a display substrate is shown.

[0166] like Figure 5 As shown, the first electrode plate portion in the first electrode plate included in the first storage capacitor C11 is labeled C11a;

[0167] The first electrode plate portion in the first electrode plate included in the second first storage capacitor C21 is labeled C21a;

[0168] The first electrode plate portion in the first electrode plate included in the third first storage capacitor C31 is labeled C31a;

[0169] C11a is electrically connected to L1 through the first via hole H11, and L1 is formed integrally with A1;

[0170] C21a is electrically connected to L2 through the second first via H21, and L2 and A2 are formed integrally;

[0171] C31a is electrically connected to L3 through the third first via hole H31, and L3 and A3 are formed integrally.

[0172] exist Figure 5 In at least one embodiment shown, the ratio of the length of L1 to the line width of L1 is less than 3;

[0173] The ratio of the length of L2 to the line width of L2 is less than 3;

[0174] The ratio of the length of L3 to the line width of L3 is less than 3;

[0175] This reduces the risk of disconnection of L1, L2, and L3, improves brightness uniformity, and reduces power consumption.

[0176] exist Figure 5 In the embodiment, C11a, C21a and C31a are formed in the source and drain metal layers;

[0177] A1, L1, A2, L2, A3 and L3 are formed in the anode layer;

[0178] F1, F2 and F3 are formed in the light emitting material layer.

[0179] like Figure 5 As shown, the first plate portion of each storage capacitor can be effectively utilized, and the second first via hole H21 connected to the anode of the organic light emitting diode in the second pixel circuit is located at a higher position in the Y direction. According to this design, the length of the anode connection line corresponding to the organic light emitting diodes of different colors is relatively small, which can effectively improve the risk of disconnection. As can be seen from FIG6, the first via holes corresponding to the organic light emitting diodes of different colors are all located outside the light emitting area. This setting can ensure that the light emitting area is flat and improve the light emitting efficiency.

[0180] As shown in Figure 6, Figure 5 In at least one embodiment shown,

[0181] C21a includes a first electrode portion C211 of C21 and a second electrode portion C212 of C21, and C211 and C212 are integrally formed;

[0182] C11a includes a first electrode portion C111 of C11 and a second electrode portion C112 of C11; C111 and C112 are integrally formed;

[0183] C31a includes a first plate portion C311 of C31 and a second plate portion C312 of C31; C311 and C312 are integrally formed;

[0184] C211 extends along a vertical direction, the vertical direction may be a Y direction, and the vertical direction may be an extending direction of the data line;

[0185] C111 extends in the vertical direction; C311 extends in the vertical direction;

[0186] The X direction may be a horizontal direction, the X direction and the Y direction intersect, the first direction may be a vertical direction, and the second direction may be a horizontal direction;

[0187] The ratio between the length of C111 in the vertical direction and the length of C111 in the horizontal direction is greater than or equal to 2;

[0188] The ratio between the length of C211 in the vertical direction and the length of C211 in the horizontal direction is greater than or equal to 2;

[0189] The ratio between the length of C311 in the vertical direction and the length of C311 in the horizontal direction is greater than or equal to 2;

[0190] When the width of the pixel circuit in the X direction is small, the length of each first electrode portion in the vertical direction can be set to be longer to increase the area of ​​the first electrode portion, which is beneficial to maintain the potential of the first node in each pixel circuit.

[0191] Figure 7 and Figure 8 is a cross-sectional view of a display substrate according to at least one embodiment of the present invention.

[0192] exist Figure 7 Among them, number 70 is a substrate, number 71 is a shading metal layer, number 72 is a buffer layer, number 73 is a semiconductor layer (the semiconductor layer can be made of IGZO (indium gallium zinc oxide)), number 74 is a gate insulating layer, number 75 is a gate metal layer, number 76 is an interlayer insulating layer, number 77 is a source-drain metal layer, number 78 is a passivation layer, number 79 is a planarization layer, number 710 is a pixel defining layer, number 711 is an anode layer, number 712 is a light-emitting material layer, and number 713 is a spacer column.

[0193] exist Figure 7 In the figure, the transistor labeled T10 is a driving transistor in the first pixel circuit, the transistor labeled T11 is a first transistor in the first pixel circuit, and the transistor labeled T12 is a second transistor in the first pixel circuit.

[0194] exist Figure 7 Among them, the first electrode portion of the first storage capacitor C1 in the first pixel circuit is labeled C11a; C11a is made of a source-drain metal layer, and a passivation layer and a flat layer are present between the source-drain metal layer and the anode layer; corresponding to the third via H3, the shading metal layer can be connected to the source-drain metal layer through the conductive oxide.

[0195] like Figure 8 As shown, corresponding to the driving transistor T10 in the first pixel circuit, the gate of T10 is marked as G10, and the second electrode of T10 is marked as D10;

[0196] The first electrode portion labeled S101 is included in the first electrode T10, and the second electrode portion labeled S102 is included in the first electrode T10;

[0197] S101 is formed in the source and drain metal layer, and S102 is formed in the light shielding metal layer;

[0198] S101 is electrically connected to S102, and T10 is set as a transistor with a Bottom Source structure, so that T10 has higher stability.

[0199] Fig.9A , Fig. 9B is a cross-sectional view of a first storage capacitor C11.

[0200] like Fig. 9B As shown, the first electrode plate of C11 includes a first electrode plate portion marked as C11a, and the second electrode plate portion of the first electrode plate of C11 is marked as C11b;

[0201] The second plate of C11 is labeled C11c;

[0202] C11a is formed in the source and drain metal layer, C11b is formed in the light shielding metal layer, and C11c is formed in the gate metal layer;

[0203] exist Fig.9A , the substrate is labeled 70, the light-shielding metal layer is labeled 71, the buffer layer is labeled 72, the gate insulating layer is labeled 74, the gate metal layer is labeled 75, the interlayer insulating layer is labeled 76, and the source-drain metal layer is labeled 77; the light-shielding metal layer 71, the gate metal layer 75, and the source-drain metal layer 77 are arranged in sequence in a direction away from the substrate 70;

[0204] like Fig. 9B As shown, the orthographic projection of C11a on the substrate 70, the orthographic projection of C11b on the substrate 70, and the orthographic projection of C11c on the substrate 70 at least partially overlap;

[0205] The first electrode plate of C11 is configured to include C11a and C11b electrically connected to each other, and the second electrode plate C11c of C11 is configured between C11a and C11b to increase the facing area of ​​the first electrode plate of C11 and the second electrode plate C11c of C11, thereby improving the potential maintenance effect of the storage capacitor.

[0206] like Fig. 10A As shown, the anode body portion of the anode of the first organic light emitting diode is labeled A1, the anode body portion of the anode of the second organic light emitting diode is labeled A2, and the anode body portion of the anode of the third organic light emitting diode is labeled A3;

[0207] The first organic light emitting diode is a blue OLED (organic light emitting diode), the second organic light emitting diode is a green OLED, and the third organic light emitting diode is a red OLED;

[0208] exist Fig. 10AAmong them, the line labeled EM is the light-emitting control line, the line labeled Rst is the reset control line, and the line labeled I0 is the initial voltage line;

[0209] exist Fig. 10A , the capacitor labeled C11 is the first storage capacitor, the capacitor labeled C12 is the second storage capacitor, and the capacitor labeled C13 is the third storage capacitor;

[0210] The first transistor is labeled T11, and the first second transistor is labeled T12;

[0211] The one labeled T21 is the second first transistor, and the one labeled T22 is the second second transistor;

[0212] The transistor labeled T31 is the third first transistor, and the transistor labeled T32 is the third second transistor;

[0213] The gate of T11, the gate of T21 and the gate of T31 are electrically connected to EM;

[0214] The gate of T12, the gate of T22 and the gate of T32 are electrically connected to Rst;

[0215] The first electrode plate of C11 is electrically connected to the first anode connection line L1 through the first first via hole H11;

[0216] The first electrode plate of C21 is electrically connected to the second anode connection line L2 through the second first via hole H21;

[0217] The first electrode plate of C21 is electrically connected to the third anode connection line L3 through the third first via hole H31.

[0218] like Fig. 10A As shown, the display substrate according to at least one embodiment of the present invention further includes a first light-emitting material pattern F1, a second light-emitting material pattern F2 and a third light-emitting material pattern F3;

[0219] The orthographic projection of A1 on the base covers the orthographic projection of F1 on the base;

[0220] The orthographic projection of A2 on the base covers the orthographic projection of F2 on the base;

[0221] The orthographic projection of A3 on the base covers the orthographic projection of F3 on the base.

[0222] exist Fig. 10A In the figure, the one labeled H2 is the second via hole, and the one labeled H3 is the third via hole.

[0223] Fig. 10A At least one embodiment of the display substrate shown is Figure 4AThe difference of at least one embodiment of the display substrate shown is that: the position of C21 is interchanged with the position of C31, the position of T21 is interchanged with the position of T31, and the position of T22 is interchanged with the position of T32;

[0224] Furthermore, the position of L2 is different from the position of L3.

[0225] Fig. 10B yes Fig. 10A Schematic diagram of the anode layer in Fig. 10C yes Fig. 10A Schematic diagram of the light-emitting material layer in FIG.

[0226] The display substrate described in at least one embodiment of the present invention includes a pixel module, and the pixel module includes a first pixel circuit, a second pixel circuit and a third pixel circuit;

[0227] The light-emitting element included in the first pixel circuit is a first light-emitting element, the light-emitting element included in the second pixel circuit is a second light-emitting element, and the light-emitting element included in the third pixel circuit is a third light-emitting element;

[0228] The anode of the second light emitting element and the anode of the third light emitting element are arranged along a first direction;

[0229] The anode of the first light emitting element and the anode of the second light emitting element are arranged along a third direction;

[0230] The first direction intersects the third direction;

[0231] The first direction is an extending direction of a data line electrically connected to the pixel module.

[0232] In at least one embodiment of the present invention, the first light-emitting element is a blue light-emitting element, the second light-emitting element is a green light-emitting element, and the third light-emitting element is a red light-emitting element; the first light-emitting element includes a first light-emitting material pattern, the second light-emitting element includes a second light-emitting material pattern, and the third light-emitting element includes a third light-emitting material pattern;

[0233] The first light-emitting material pattern is larger than an area of ​​the second light-emitting material layer, and an area of ​​the first light-emitting material pattern is larger than an area of ​​the third light-emitting material pattern.

[0234] In a specific implementation, the first pixel circuit, the second pixel circuit and the third pixel circuit can be arranged in a triangle. This arrangement can make the spacing between light-emitting elements of the same color between different pixels larger, which is conducive to using a fine metal mask (Fine Metal Mask) to deposit light-emitting elements of corresponding colors in the light-emitting area of ​​the substrate by evaporation. Since the efficiency of the blue light-emitting element is relatively low, the area of ​​the blue light-emitting element can be set to be larger, which is conducive to improving the life of the OLED device and reducing the power consumption of the OLED device.

[0235] like Fig.11 As shown, the first light emitting element is labeled E11, the second light emitting element is labeled E21, and the third light emitting element is labeled E31;

[0236] E31 and E21 are arranged in the vertical direction;

[0237] The area of ​​the luminescent material pattern of E11 is larger than the area of ​​the luminescent material pattern of E21, and the area of ​​the luminescent material pattern of E11 is larger than the area of ​​the luminescent material pattern of E31.

[0238] The display device described in the embodiment of the present invention includes the above-mentioned display substrate.

[0239] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A display substrate, characterized in that: It comprises a plurality of pixel circuits; the pixel circuit comprises a pixel driving circuit and a light emitting element, and the pixel driving circuit comprises a driving output terminal; The anode of the light emitting element comprises an anode main body and an anode connecting wire formed in one piece; The anode connecting wire is electrically connected to the anode main body and the driving output terminal respectively; The length of the anode connection line is less than or equal to N times the line width of the anode connection line, and N is greater than or equal to 1 and less than or equal to 5.

2. The display substrate according to claim 1, wherein: The pixel driving circuit includes a storage capacitor, the storage capacitor includes a first plate, and the first plate includes a first plate portion; The first electrode portion is electrically connected to the anode connection line through a first via hole.

3. The display substrate according to claim 2, wherein: It also includes a substrate; the pixel circuit is arranged on the substrate; the effective light emitting area of ​​the light emitting element is located inside the anode main body; An orthographic projection of the first via hole on the substrate does not overlap with an orthographic projection of the anode body on the substrate.

4. The display substrate according to claim 2, wherein: The first electrode portion includes a first electrode portion extending along a first direction; the first direction is an extending direction of a data line electrically connected to the pixel driving circuit; The length of the first electrode portion along the first direction is a first length, and the length of the first electrode portion along the second direction is a second length; the first length is greater than the second length; The second direction intersects the first direction.

5. The display substrate according to claim 4, wherein: A ratio of the first length to the second length is greater than or equal to 2.

6. The display substrate according to claim 4, wherein: The first electrode portion is electrically connected to the anode connection line through a first via hole.

7. The display substrate according to claim 4, wherein: The first electrode portion further includes a second electrode portion integrally formed with the first electrode portion; The second electrode portion is electrically connected to the anode connection line through a first via hole.

8. The display substrate according to claim 2, wherein: The pixel circuit is arranged on the substrate; the first electrode plate further comprises a second electrode plate portion electrically connected to the first electrode plate portion; the storage capacitor further comprises a second electrode plate; The first electrode portion is formed on a first metal layer, the second electrode portion is formed on a second metal layer, and the second electrode is formed on a third metal layer; The second metal layer, the third metal layer and the first metal layer are arranged in a direction away from the substrate; The orthographic projection of the first electrode portion on the substrate, the orthographic projection of the second electrode portion on the substrate, and the orthographic projection of the second electrode portion on the substrate at least partially overlap.

9. The display substrate according to any one of claims 1 to 8, characterized in that: The display substrate includes a first pixel circuit, a second pixel circuit and a third pixel circuit; The light emitting element included in the first pixel circuit is a red light emitting element, the light emitting element included in the second pixel circuit is a green light emitting element, and the light emitting element included in the third pixel circuit is a blue light emitting element; the ratio of the length of the anode connection line included in the red light emitting element to the length of the anode connection line included in the green light emitting element is greater than 1 and less than 2; The ratio of the length of the anode connection line included in the blue light emitting element to the length of the anode connection line included in the green light emitting element is greater than 1 and less than 2; A ratio of a length of an anode connection line included in the red light emitting element to a length of an anode connection line included in the blue light emitting element is greater than 0.75 and less than 1.

25.

10. The display substrate according to any one of claims 1 to 8, characterized in that: The pixel driving circuit includes a driving transistor; The driving transistor includes a gate, a first electrode and a second electrode, wherein the first electrode includes a first electrode portion and a second electrode portion electrically connected to each other; The first electrode portion and the second electrode are formed on a first metal layer, and the second electrode portion is formed on a second metal layer.

11. The display substrate according to any one of claims 1 to 6, characterized in that: The pixel driving circuit includes a driving transistor; The driving transistor includes a gate, a first electrode and a second electrode, the first electrode includes a first electrode portion and a second electrode portion electrically connected to each other; the second electrode includes a third electrode portion and a fourth electrode portion electrically connected to each other; The first electrode portion and the third electrode portion are formed in a first metal layer, and the second electrode portion and the fourth electrode portion are formed in a second metal layer.

12. The display substrate according to any one of claims 2 to 6, characterized in that: The pixel driving circuit further includes a driving circuit, a first light emitting control circuit and a first initialization circuit; The control end of the driving circuit is electrically connected to the first node, the first end of the driving circuit is electrically connected to the second node, the second end of the driving circuit is electrically connected to the third node, and the driving circuit is used to generate a driving current under the control of the potential of the first node; The first light-emitting control circuit is electrically connected to the light-emitting control line, the second node and the driving output end respectively, and is used to control the connection or disconnection between the second node and the driving output end under the control of the light-emitting control signal provided by the light-emitting control line; The first initialization circuit is electrically connected to the reset control line, the initial voltage line and the driving output terminal respectively, and is used to write the initial voltage provided by the initial voltage line into the driving output terminal under the control of the reset control signal provided by the reset control line; The driving output terminal is electrically connected to the anode of the light emitting element.

13. The display substrate according to claim 12, wherein: The driving circuit includes a driving transistor, the first light emitting control circuit includes a first transistor, and the first initialization circuit includes a second transistor; The gate of the driving transistor is electrically connected to the first node; The first electrode of the driving transistor is electrically connected to the second node, and the second electrode of the driving transistor is electrically connected to the third node; or the first electrode of the driving circuit is electrically connected to the third node, and the second electrode of the driving transistor is electrically connected to the second node; The gate of the first transistor is electrically connected to the light emitting control line, the first electrode of the first transistor is electrically connected to the second node, and the second electrode of the first transistor is electrically connected to the driving output terminal; The gate of the second transistor is electrically connected to the reset control line, the first electrode of the second transistor is electrically connected to the initial voltage line, and the second electrode of the second transistor is electrically connected to the driving output terminal; The second plate of the storage capacitor is electrically connected to the first node, and the first plate of the storage capacitor is electrically connected to the anode of the light emitting element.

14. The display substrate according to any one of claims 1 to 6, characterized in that: A pixel module is included, wherein the pixel module includes a first pixel circuit, a second pixel circuit and a third pixel circuit; The light-emitting element included in the first pixel circuit is a first light-emitting element, the light-emitting element included in the second pixel circuit is a second light-emitting element, and the light-emitting element included in the third pixel circuit is a third light-emitting element; The anode of the second light emitting element and the anode of the third light emitting element are arranged along a first direction; The anode of the first light emitting element and the anode of the second light emitting element are arranged along a third direction; The first direction intersects the third direction; The first direction is an extending direction of a data line electrically connected to the pixel module.

15. The display substrate according to claim 14, wherein: The first light-emitting element is a blue light-emitting element, the second light-emitting element is a green light-emitting element, and the third light-emitting element is a red light-emitting element; the first light-emitting element includes a first light-emitting material pattern, the second light-emitting element includes a second light-emitting material pattern, and the third light-emitting element includes a third light-emitting material pattern; The first light-emitting material pattern is larger than an area of ​​the second light-emitting material layer, and an area of ​​the first light-emitting material pattern is larger than an area of ​​the third light-emitting material pattern.

16. A display device, characterized in that: The display substrate comprises the display substrate as claimed in any one of claims 1 to 15.

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