Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate, a circuit layer and a cathode layer, the circuit layer is located on one side of the substrate; the cathode layer is located on one side of the circuit layer away from the substrate; the cathode layer at least comprises a first type of cathodes and a second type of cathodes, and the first type of cathodes and the second type of cathodes are arranged at intervals; the circuit layer comprises a cathode power line; the cathode power line at least comprises a first type power line and a second type power line; the first type of cathodes are electrically connected with the first type of power lines, and the second type of cathodes are electrically connected with the second type of power lines; the first-type power line receives a first cathode signal, the second-type power line receives a second cathode signal, and the voltage absolute value of the first cathode signal is greater than that of the second cathode signal; the first type power line comprises a first main line, the second type power line comprises a second main line, and the width of the first main line is larger than that of the second main line. According to the technical scheme, the power consumption of the display panel can be reduced.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) display panels have the characteristics of self-luminescence, high brightness, wide viewing angle, high contrast, flexibility, and low energy consumption, and are widely used in display devices.

[0003] OLED display panels are composed of OLED elements with different luminous colors. In the prior art, all OLED elements usually share a whole layer of cathode. However, OLED elements with different luminous colors require different operating voltages. In order to ensure that each OLED element can work in the saturation region and meet the normal display of all images, the cathode voltage required by the OLED element with the largest operating voltage is usually selected as the voltage value of the cathode signal received by the cathode layer. In this way, power consumption is actually wasted for other OLED elements, resulting in a large overall power consumption of the display panel. Summary of the invention

[0004] The invention provides a display panel and a display device to reduce the power consumption of the display panel.

[0005] According to one aspect of the present invention, there is provided a display panel, comprising:

[0006] substrate;

[0007] A circuit layer, located on one side of the substrate;

[0008] The cathode layer is located on the side of the circuit layer away from the substrate; the cathode layer at least includes a first type of cathode and a second type of cathode, and the first type of cathode and the second type of cathode are arranged at intervals;

[0009] The circuit layer includes cathode power lines; the cathode power lines include at least a first type of power line and a second type of power line; the first type of cathode is electrically connected to the first type of power line, and the second type of cathode is electrically connected to the second type of power line; the first type of power line receives a first cathode signal, and the second type of power line receives a second cathode signal, and the absolute value of the voltage of the first cathode signal is greater than the absolute value of the voltage of the second cathode signal; the first type of power line includes a first main line, and the second type of power line includes a second main line, and the width of the first main line is greater than the width of the second main line.

[0010] According to another aspect of the present invention, a display device is provided, comprising the display panel provided by any embodiment of the present invention.

[0011] The technical solution of the embodiment of the present invention is to set the cathode layer to at least include the first type of cathode and the second type of cathode arranged at intervals, and the cathode power lines in the circuit layer to at least include the first type of power lines and the second type of power lines, so that the first type of cathode is electrically connected to the first type of power lines, and the second type of cathode is electrically connected to the second type of power lines, and the first type of power lines are used to receive and transmit the first cathode signal, and the second type of power lines are used to receive and transmit the second cathode signal. In this way, the cathode signals of the first type of cathode and the second type of cathode can be independently controlled, and then the first cathode signal and the second cathode signal can be adaptively set according to the actual working voltage requirements of the OLED element corresponding to the first type of cathode and the OLED element corresponding to the second type of cathode. The numerical value of the first cathode signal and the second cathode signal is adjusted to reduce power waste, thereby reducing the overall power consumption of the display panel; in addition, according to the size relationship between the first cathode signal and the second cathode signal, the width of the first main line of the first type of power line and the width of the second main line of the second type of power line are adaptively differentiated. For example, when the absolute value of the voltage of the first cathode signal transmitted by the first type of power line is greater than the absolute value of the voltage of the second cathode signal transmitted by the second type of power line, the width of the first main line is set to be greater than the width of the second main line. This can make the impedance of the first type of power line lower, and under the limited wiring space in the display panel, the power consumption generated on all cathode power lines can be reduced to a greater extent, thereby reducing the power consumption of the display panel to a greater extent.

[0012] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention;

[0015] Figure 2 is along Figure 1 A schematic cross-sectional structure diagram of a display panel taken along section BB';

[0016] Figure 3 It is a structural schematic diagram of a pixel circuit in the related art;

[0017] Figure 4 yes Figure 3 A driving timing diagram of the pixel circuit shown;

[0018] Figure 5 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0019] Figure 6 is along Figure 5 A schematic cross-sectional structure diagram of a display panel taken at CC';

[0020] Figure 7 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0021] Figure 8 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0022] Fig. 9 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0023] Fig.10 is along Fig. 9 A schematic cross-sectional structure diagram of a display panel taken at EE';

[0024] Fig.11 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0025] Fig.12 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0026] Fig.13 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0027] Fig.14 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0028] Fig.15 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0029] Fig.16 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0030] Fig.17 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0031] Fig.18 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0032] Fig.19 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention;

[0033] Fig. 20 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0035] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0036] First of all, it should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left" and "right" and similar words are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, the shapes and sizes of the components in the accompanying drawings do not reflect the true proportions, and the purpose is only to illustrate the content of the present invention.

[0037] Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention, Figure 2 is along Figure 1 A schematic diagram of a cross-sectional structure of a display panel taken at BB', as shown in FIG. Figure 1 and Figure 2As shown, the display panel 100 provided by the embodiment of the present invention includes a substrate 10, a circuit layer 20 and a cathode layer 33, wherein the circuit layer 20 is located on one side of the substrate 10; the cathode layer 33 is located on the side of the circuit layer 20 away from the substrate 10; the cathode layer 33 at least includes a first type of cathode 331 and a second type of cathode 332, and the first type of cathode 331 and the second type of cathode 332 are arranged at intervals; the circuit layer 20 includes a cathode power line 20a; the cathode power line 20a at least includes a first type of power line 21 and a second type of power line 22; the first type of cathode 331 is electrically connected to the first type of power line 21, and the second type of cathode 332 is electrically connected to the second type of power line 22; the first type of power line 21 receives a first cathode signal, and the second type of power line 22 receives a second cathode signal, and the absolute value of the voltage of the first cathode signal is greater than the absolute value of the voltage of the second cathode signal; the first type of power line 21 includes a first main line 211, and the second type of power line 22 includes a second main line 221, and the width d1 of the first main line 211 is greater than the width d2 of the second main line 221.

[0038] Among them, the circuit layer 20 is mainly used to form circuit structures such as pixel circuits, gate drive circuits, multiplexing circuits and electrostatic protection circuits. Among them, the pixel circuit is electrically connected to the OLED element, and one pixel circuit can be used to drive at least one OLED element to emit light; the gate drive circuit is electrically connected to the pixel circuit, and is used to enable the pixel circuit row by row, so as to light up the OLED element row by row through the pixel circuit to complete the display of a frame of the picture. The multiplexing circuit and the electrostatic protection circuit can be set as needed, among which the multiplexing circuit mainly solves the problem of mismatch between the number of signal lines and the number of driver chip pins, and the electrostatic protection circuit plays an electrostatic protection role to ensure the reliability of the display panel.

[0039] like Figure 2 As shown, the display panel includes an anode layer 31, an organic light-emitting layer 32 and a cathode layer 33 located on the side of the circuit layer 20 away from the substrate 10, the organic light-emitting layer 32 is located on the side of the anode layer 31 away from the substrate 10, and the cathode layer 33 is located on the side of the organic light-emitting layer 32 away from the substrate 10. The anode layer 31 includes a plurality of independent anode structures 310, the organic light-emitting layer 32 includes a plurality of organic light-emitting parts 320, and a pixel defining layer 5 is arranged between adjacent organic light-emitting parts 320. The cathode layer 33 includes a cathode structure, and the organic light-emitting part 320 and the anode structures 310 and cathode structures on opposite sides thereof constitute an OLED element 30. The anode structure 310 is electrically connected to the pixel circuit 210, and the cathode structure is electrically connected to the cathode power line.

[0040] Reference Figure 1In this embodiment, the cathode structure in the cathode layer 33 is divided into at least two categories, that is, the cathode layer 33 at least includes a first type of cathode 331 and a second type of cathode 332, and the first type of cathode 331 and the second type of cathode 332 are arranged at intervals. Correspondingly, the cathode power line 20a at least includes a first type of power line 21 and a second type of power line 22, the first type of cathode 331 is electrically connected to the first type of power line 21, and the second type of cathode 332 is electrically connected to the second type of power line 22, the first type of power line 21 receives a first cathode signal, and the second type of power line 22 receives a second cathode signal. In this way, the first cathode signal can be transmitted to the first type of cathode 331 through the first type of power line 21, and the second cathode signal can be transmitted to the second type of cathode 332 through the second type of power line 22, so as to realize independent control of the cathode signals of the first type of cathode 331 and the second type of cathode 332, and then the numerical values ​​of the first cathode signal and the second cathode signal can be adaptively set according to the actual working voltage requirements of the OLED element corresponding to the first type of cathode 331 and the OLED element corresponding to the second type of cathode 332, so as to reduce power consumption waste and thus reduce the overall power consumption of the display panel.

[0041] For example, Figure 3 is a schematic diagram of a pixel circuit structure in the related art, such as Figure 3 As shown, the pixel circuit includes a driving transistor T1, an initialization transistor T2, a data writing transistor T3, a threshold compensation transistor T4, a first light emission control transistor T5, a second light emission control transistor T6, a reset transistor T7 and a storage capacitor Cst, which can constitute a 7T1C pixel circuit. Optionally, the driving transistor T1, the data writing transistor T3, the first light emission control transistor T5, the second light emission control transistor T6 and the reset transistor T7 are LTPS transistors to reduce the power consumption of the pixel circuit and shorten the response time of the pixel circuit. The initialization transistor T2 and the threshold compensation transistor T4 are IGZO transistors to reduce the leakage current of the initialization transistor T2 and the threshold compensation transistor T4, thereby reducing the influence of the leakage current of the initialization transistor T2 and the threshold compensation transistor T4 on the gate potential of the driving transistor T1, and further optimizing the performance of the pixel circuit.

[0042] Figure 4 yes Figure 3 A driving timing diagram of the pixel circuit shown in FIG. Figure 3 and Figure 4As shown, the driving process of the pixel circuit includes an initialization phase t1, a data writing phase t2 and a light emitting phase t3. Specifically, in the initialization phase t1, the initialization transistor T2 is turned on under the control of the first scanning control signal sent by the first scanning control signal terminal Scan1, so that the initialization signal of the initialization signal terminal Vref is written into the gate of the driving transistor T1, and the gate of the driving crystal transistor is initialized. In the data writing phase t2, the data writing transistor T3 is turned on under the control of the second scanning control signal sent by the second scanning control signal terminal Scan2, and the threshold compensation transistor T4 is turned on under the control of the third scanning control signal sent by the third scanning control signal terminal Scan3. At the same time, the driving transistor T1 is turned on because the gate-source voltage meets the turn-on condition, so that the data writing transistor T3 writes the data signal of the data signal terminal into the gate of the driving transistor T1, and at the same time, the threshold compensation transistor T4 drives the gate of the transistor T1 with the threshold voltage compensation value of the driving transistor T1. In addition, in the data writing stage t2, the reset transistor T7 can be turned on under the control of the second scanning control signal sent by the second scanning control signal terminal Scan2, and the initialization signal of the initialization signal terminal Vref is written into the anode of the organic light emitting diode OLED to reset the anode voltage of the organic light emitting diode OLED. In the light emitting stage t3, the first light emitting control transistor T5 and the second light emitting control transistor T6 are turned on under the control of the light emitting control signal of the light emitting control signal terminal Emit. Since the storage capacitor Cst stores the gate potential of the driving transistor T1, the driving transistor T1 generates a driving current based on the gate potential and the potential of the first power signal terminal PVDD to drive the OLED to emit light. Figure 3 In the embodiment, PVEE is a second power signal terminal, which is used to provide a cathode signal to the cathode of the OLED, and the potential of the second power signal terminal is less than the potential of the first power signal terminal.

[0043] Reference Figure 3 , an OLED element of one luminous color corresponds to a sub-pixel of one luminous color, and the power consumption of the sub-pixel is (PVDD-PVEE)*I OLED is positively correlated, where PVDD represents the voltage of the first power signal terminal PVDD, PVEE represents the voltage of the second power signal terminal, and PVDD-PVEE can represent the operating voltage of the OLED element. OLEDRepresents the current flowing through the OLED element. Usually, the PVDD voltage corresponding to all OLED elements is consistent. Assuming that the cathode signal (PVEE) required by the OLED element with the largest working voltage among all OLED elements is -4V, and the cathode signal actually required by a certain type of OLED element is only -1V, if the existing cathode layer is set as a whole layer, and all OLED elements share a cathode, the PVEE voltage is -4V to ensure that all OLED elements work in the saturation region and all images are displayed normally, resulting in the actual power consumption of some OLED elements being greater than the maximum power consumption actually required, thereby increasing the overall power consumption of the display panel. The technical solution of the embodiment of the present invention is adopted, by dividing the cathode layer 33 into at least two types of cathodes, and the cathodes of different types are arranged at intervals, for example, the first type of cathode 331 and the second type of cathode 332 are arranged at intervals, and the first type of power signal line 21 is correspondingly set to transmit the first cathode signal for the first type of cathode 331, and the second type of power line 22 is set to transmit the second cathode signal for the second type of cathode 332. In this way, the numerical values ​​of the first cathode signal and the second cathode signal can be adaptively set according to the actual working voltage requirements of different OLED elements, thereby reducing power consumption waste and thus reducing the overall power consumption of the display panel.

[0044] It should be noted that Figure 1 The arrangement of the organic light-emitting portion 320 (ie, the pixel arrangement) shown is for illustration only and does not constitute a limitation on the technical solution of the embodiment of the present invention. The embodiment of the present invention is applicable to any type of pixel arrangement. Figure 3 and Figure 4 The structure of the pixel circuit and its operation timing are only for illustration and do not constitute a limitation on the technical solution of the embodiment of the present invention. The technical solution of the embodiment of the present invention is applicable to pixel circuits of any current driving type.

[0045] Reference Figure 1 and Figure 2 , the cathode power line 20a can be arranged in the circuit layer 20, referring to Figure 1 The cathodes in the cathode layer 33 (such as the first type cathodes 331 and the second type cathodes 332 ) and their corresponding cathode power lines 20 a can be electrically connected through the vias 5 .

[0046] Reference Figure 1 The display panel 100 includes a display area AA and a non-display area NA located on at least one side of the display area AA. Optionally, a first main line 211 of the first type of power line 21 and a second main line 221 of the second type of power line 22 are arranged in the non-display area NA. Such an arrangement can reduce the difficulty of wiring.

[0047] Furthermore, if Figure 1 As shown, in this embodiment, the width d1 of the first main line 211 is greater than the width d2 of the second main line 221. Figure 1 , the cathode signal is provided by the power board or the driver chip, and then transmitted to the corresponding cathode in the cathode layer 33 via the cathode power line 20a. It can be understood that the cathode power line 20a has a certain resistance, so that the voltage of the cathode signal will lose a part on the cathode power line 20a, that is, there is an IR drop (voltage drop) on the cathode power line, which will generate power consumption. Therefore, the power consumption of the sub-pixel includes not only the power consumption of the OLED element, but also the power consumption on the corresponding cathode power line 20a (of course, other wirings will also have power consumption, which is not considered here), and the power consumption of the display panel includes the power consumption of all OLED elements and the power consumption on all cathode power lines 20a. Considering that the power consumption of the OLED element is necessary to realize the display, and the power consumption on the cathode power line 20a is adjustable, therefore, the power consumption on the cathode power line 20a can be reduced by reducing the impedance of the cathode power line 20a, so as to reduce the power consumption of the display panel.

[0048] Optionally, the line width of the cathode power line 20a may be increased to reduce its impedance and thereby reduce power consumption.

[0049] In this embodiment, the absolute value of the voltage of the first cathode signal transmitted by the first power line 21 is greater than the absolute value of the voltage of the second cathode signal transmitted by the second power line 22, indicating that the working voltage (PVDD-PVEE) of the sub-pixel corresponding to the first power line 21 is greater than the working voltage of the sub-pixel corresponding to the second power line 22. Therefore, the current flowing through the OLED element in the sub-pixel corresponding to the first power line 21 is greater than the current flowing through the OLED element in the sub-pixel corresponding to the second power line 22, that is, the current on the first power line 21 is greater than the current on the second power line 22. In addition, since the power consumption of the routing is related to I 2 R is positively correlated, and the current on the first type of power line 21 is greater than the current on the second type of power line 22. Therefore, when the impedance reduction degree of the first type of power line 21 and the second type of power line 22 is the same, the power consumption reduction degree of the first type of power line 21 is greater than the power consumption reduction degree of the second type of power line 22. In view of this, since the wiring space in the display panel is very limited, this embodiment can reduce the impedance of the first type of power line 21 to a greater extent by setting the width of the first main line 211 to be greater than the width of the second main line 221, and reduce the power consumption of the first type of power line 21 to a greater extent, thereby reducing the power consumption of all cathode power lines 20a to a greater extent, and reducing the power consumption of the display panel to a greater extent. Of course, when the wiring space of the display panel is sufficient, all cathode power lines 20a can also be set to have a larger width.

[0050] For example, assuming that the current on the first type power line 21 is 10μA, the current on the second type power line 22 is 8μA, and the original design impedance of the first type power line 21 and the second type power line 22 is R, then the total power of the two is P = 100R + 64R = 164R. When the impedance of the first type power line 21 remains unchanged and the impedance of the second type power line 22 decreases by 20%, the total power of the two is P = 100R + 64*0.8R = 151.2R; when the impedance of the first type power line 21 decreases by 10% and the impedance of the second type power line 22 decreases by 10%, the total power of the two is P = 100*0.9R + 64*0.9R = 147.6R; when the impedance of the first type power line 21 decreases by 20% and the impedance of the second type power line 22 remains unchanged, the total power of the two is P = 100*0.8R + 64R = 144R. It can be seen from this that reducing the impedance of the first type power line 21 to a greater extent can reduce the power consumption on all cathode power lines to a greater extent, thereby reducing the power consumption of the display panel to a greater extent.

[0051] In summary, the embodiments of the present invention provide a cathode layer including at least a first type of cathode and a second type of cathode arranged at intervals, and a cathode power line in the circuit layer including at least a first type of power line and a second type of power line, so that the first type of cathode is electrically connected to the first type of power line, and the second type of cathode is electrically connected to the second type of power line, and the first type of power line is used to receive and transmit a first cathode signal, and the second type of power line is used to receive and transmit a second cathode signal. In this way, independent control of the cathode signals of the first type of cathode and the second type of cathode can be achieved, and then the voltage of the first cathode signal and the second cathode signal can be adaptively set according to the actual working voltage requirements of the OLED element corresponding to the first type of cathode and the OLED element corresponding to the second type of cathode. The value size can reduce power waste and thus reduce the overall power consumption of the display panel; in addition, according to the size relationship between the first cathode signal and the second cathode signal, the width of the first main line of the first type of power line and the width of the second main line of the second type of power line are adaptively differentiated. For example, when the absolute value of the voltage of the first cathode signal transmitted by the first type of power line is greater than the absolute value of the voltage of the second cathode signal transmitted by the second type of power line, the width of the first main line is set to be greater than the width of the second main line. This can make the impedance of the first type of power line lower, and under the limited wiring space in the display panel, the power consumption generated on the cathode power line can be reduced to a greater extent, thereby reducing the power consumption of the display panel to a greater extent.

[0052] Reference Figure 1 and Figure 2 Optionally, the organic light-emitting portion 320 includes at least a first type light-emitting portion 321 and a second type light-emitting portion 322 with different luminous colors, a first type cathode 331 covers at least one first type light-emitting portion 321, and a second type cathode 332 covers at least one second type light-emitting portion 322.

[0053] Specifically, according to different display requirements, the display panel may include sub-pixels of at least two colors. Accordingly, the organic light-emitting portion 320 includes at least two organic light-emitting portions with different light-emitting colors, namely a first light-emitting portion 321 and a second light-emitting portion 322 .

[0054] For example, Figure 1 The organic light-emitting portion 320 includes a first type of light-emitting portion 321 and a second type of light-emitting portion 322 . In other embodiments, the organic light-emitting portion 320 may include more types of light-emitting portions, which is not limited in the embodiments of the present invention.

[0055] Furthermore, according to the arrangement of sub-pixels (organic light-emitting portions 320 ), a first-type cathode 331 covers at least one first-type light-emitting portion 321 , and a second-type cathode 332 covers at least one second-type light-emitting portion 322 .

[0056] For example, Figure 1 The first type of light emitting parts 321 are arranged in a row, and the second type of organic light emitting parts 322 are arranged in a row. Correspondingly, one first type of cathode 331 can cover the first type of light emitting parts 321 in the same row, and one second type of cathode 332 can cover the second type of light emitting parts 322 in the same row. In other embodiments, different first type of light emitting parts 321 / second type of light emitting parts 322 may not be arranged adjacent to each other. In this case, one first type of cathode 331 may only cover one first type of light emitting part 321, and one second type of cathode 332 may only cover one second type of light emitting part 322, which will be illustrated later.

[0057] Figure 5 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, Figure 6 is along Figure 5 A schematic diagram of a cross-sectional structure of a display panel taken at CC' in FIG. Figure 5 and Figure 6 As shown, optionally, in addition to the first type of light-emitting portion 321 and the second type of light-emitting portion 322, the organic light-emitting portion 320 also includes a third type of light-emitting portion 323, and the light-emitting color of the third type of light-emitting portion 323 is different from the light-emitting colors of the first type of light-emitting portion 321 and the second type of light-emitting portion 322; a second type of cathode 332 covers at least one second type of light-emitting portion 322 and at least one third type of light-emitting portion 323.

[0058] Specifically, when the organic light-emitting portion 320 includes three or more organic light-emitting portions with different luminous colors, the organic light-emitting portion 320 can be divided into two groups according to the actual operating voltage required by the OLED elements corresponding to each organic light-emitting portion 320, so that the operating voltage of the OLED elements corresponding to the organic light-emitting portion 320 in each group is similar or even the same, and then one group of the organic light-emitting portions is covered by the first type of cathode 331, and the other group of the organic light-emitting portions is covered by the second type of cathode 332. In this way, while reducing power consumption, it is possible to reduce the difficulty of dividing the cathode layer, reduce the number of cathode power lines, and reduce the difficulty of wiring.

[0059] For example, refer to Figure 5 In this embodiment, the organic light-emitting portion 320 includes a first type of light-emitting portion 321, a second type of light-emitting portion 322 and a third type of light-emitting portion 323. The operating voltages of the OLED element corresponding to the second type of light-emitting portion 322 and the OLED element corresponding to the third type of light-emitting portion 323 are the same or similar, and the operating voltage of the OLED element corresponding to the first type of light-emitting portion 321 is quite different from the two. At this time, a first type cathode 331 can be selected to cover at least one first type of light-emitting portion 321, and a second type of cathode 332 can be selected to cover at least one second type of light-emitting portion 322 and at least one third type of light-emitting portion 323.

[0060] It should be noted that the number of organic light-emitting parts covered by the cathode is specifically determined by the arrangement of the organic light-emitting parts 320. Figure 5 The arrangement shown is not exclusive.

[0061] Further optionally, the first type of light-emitting portion 321 is a blue light-emitting portion; one of the second type of light-emitting portion 322 and the third type of light-emitting portion 323 is a green light-emitting portion, and the other is a red light-emitting portion.

[0062] Specifically, by providing the organic light-emitting portion 320 with organic light-emitting portions of three colors, red, green, and blue, color display can be achieved. Furthermore, since the operating voltage required for the blue OLED is relatively large, while the operating voltages required for the red OLED and the green OLED are similar, the first type of light-emitting portion 321 can be selected as a blue light-emitting portion; one of the second type of light-emitting portion 322 and the third type of light-emitting portion 323 is a green light-emitting portion, and the other is a red light-emitting portion, so that the first type of cathode 331 covers at least one blue light-emitting portion, and the second type of cathode 332 covers at least one green light-emitting portion and at least one red light-emitting portion, so as to reduce power consumption, reduce the number of cathode power lines, and reduce wiring difficulty.

[0063] Figure 7 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Figure 7As shown, in other embodiments, when the organic light-emitting portion 320 also includes a third type of light-emitting portion 323 whose light-emitting color is different from the light-emitting color of the first type of light-emitting portion 321 and the second type of light-emitting portion 322, optionally, the cathode layer 33 also includes a third type of cathode 333, and the third type of cathode 333 and the first type of cathode 331 are arranged at intervals, and the third type of cathode 333 and the second type of cathode 332 are arranged at intervals; a third type of cathode 333 covers at least one third type of light-emitting portion 323; the cathode power line 20a also includes a third type of power line 23, and the third type of cathode 333 is electrically connected to the third type of power line 23; the third type of power line 23 receives a third cathode signal, and the absolute value of the voltage of the third cathode signal is less than the absolute value of the voltage of the first cathode signal; the third type of power line 23 includes a third main line 231, and the width d3 of the third main line 231 is less than the width d1 of the first main line 211.

[0064] Specifically, when the organic light-emitting portion 320 includes three or more organic light-emitting portions with different light-emitting colors, the cathode layer 33 can be divided into several types of cathodes with an equal number, and accordingly, the cathode power line 20a includes several types of cathode power lines with an equal number. In this way, the size of the cathode signal transmitted by each type of cathode power line can be adaptively set according to the actual working voltage requirements of different OLED elements, thereby minimizing power consumption waste and reducing the overall power consumption of the display panel.

[0065] For example, refer to Figure 7 In this embodiment, the organic light-emitting portion 320 includes a first type of light-emitting portion 321, a second type of light-emitting portion 322 and a third type of light-emitting portion 323. Correspondingly, the cathode layer 33 includes a first type of cathode 331, a second type of cathode 332 and a third type of cathode 333. A first type of cathode 331 covers at least one first type of light-emitting portion 321, a second type of cathode 332 covers at least one second type of light-emitting portion 322, and a third type of cathode 333 covers at least one third type of light-emitting portion 323. Correspondingly, the cathode power line 20a includes a first type of power line 21, The second power line 22 and the third power line 23, the first power line 21 transmits a first cathode signal to the first cathode 331, the second power line 22 transmits a second cathode signal to the second cathode 332, and the third power line 23 transmits a third cathode signal to the third cathode 333, thereby realizing independent control of the cathode signals of OLEDs with different luminous colors. The size of the cathode signals transmitted by each type of cathode power line can be adaptively set according to the actual working voltage requirements of different OLED elements, thereby minimizing power waste and reducing the overall power consumption of the display panel.

[0066] In addition, referring to the above explanation, since the absolute value of the voltage of the first cathode signal is greater than the absolute value of the voltage of the third cathode signal, by setting the width d3 of the third main line 231 of the third type of power line 23 to be smaller than the width d1 of the first main line 211 of the first type of power line 21, it is beneficial to reduce the power consumption of the cathode power line 20a to a greater extent within a limited wiring space, thereby reducing the power consumption of the display panel.

[0067] Reference Figure 7 Optionally, the third main line 231 is located in the non-display area NA, which can reduce the difficulty of wiring.

[0068] Reference Figure 7 Optionally, the first type of light-emitting unit 321 is a blue light-emitting unit; the second type of light-emitting unit 322 is a green light-emitting unit, and the third type of light-emitting unit 323 is a red light-emitting unit; the absolute value of the voltage of the third cathode signal is greater than or equal to the absolute value of the voltage of the second cathode signal; the width d3 of the third main line 231 is greater than or equal to the width d2 of the second main line 221.

[0069] Specifically, the operating voltage required by the red OLED is usually slightly greater than or equal to the operating voltage required by the green OLED. When the second type of light-emitting portion 322 is a green light-emitting portion and the third type of light-emitting portion 323 is a red light-emitting portion, the absolute value of the voltage of the third cathode signal can be set to be greater than or equal to the absolute value of the voltage of the second cathode signal. The setting can be based on actual needs, and the embodiment of the present invention does not limit this. Adaptively, when the absolute value of the voltage of the third cathode signal is greater than the absolute value of the voltage of the second cathode signal, the width d3 of the third main line 231 can be set to be greater than the width d2 of the second main line 221. When the absolute value of the voltage of the third cathode signal is equal to the absolute value of the voltage of the second cathode signal, the width d3 of the third main line 231 can be set to be equal to the width d2 of the second main line 221.

[0070] In specific implementation, when the actual working voltage of the red OLED is greater than the actual working voltage of the green OLED, Figure 7 , the cathode layer 33 is provided to include a first type cathode 331, a second type cathode 332 and a third type cathode 333, a first type cathode 331 covers at least one blue light emitting portion (first type light emitting portion 321), a second type cathode 332 covers at least one green light emitting portion (second type light emitting portion 322), a third type cathode 333 covers at least one red light emitting portion (third type light emitting portion 323), the width of the first main line 211 is greater than the width of the third main line 231, and the width of the third main line 231 is greater than the width of the second main line 221. In this way, the corresponding cathode signal can be independently set according to the actual working voltage of each OLED element, reducing power consumption waste. In addition, the power consumption generated on the cathode power line can be reduced to a greater extent under limited wiring space, thereby further reducing the power consumption of the display panel.

[0071] In addition, when the actual operating voltage of the red OLED is equal to the actual operating voltage of the green OLED, Figure 5 The cathode layer 33 is provided to include a first type cathode 331 and a second type cathode 332. A first type cathode 331 covers at least one blue light-emitting portion (first type light-emitting portion 321), and a second type cathode 332 covers at least one green light-emitting portion (second type light-emitting portion 322) and at least one red light-emitting portion (third type light-emitting portion 323). In this way, the power consumption waste can be reduced, the power consumption generated on the cathode power line can be reduced, the power consumption of the display panel can be reduced, and the number of wirings can be reduced, thereby reducing the difficulty of wiring.

[0072] Figure 8 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Figure 8 As shown, optionally, the first type of power line 21 also includes multiple first branch lines 212, the extension directions of the first branch lines 212 and the first main line 211 intersect, and the multiple first branch lines 212 are electrically connected to the first main line 211; the first main line 211 is located in the non-display area NA, and the first branch lines 212 pass through the display area AA.

[0073] Specifically, by setting a plurality of first branch lines 212 passing through the display area AA, so that the plurality of first branch lines 212 are electrically connected to the first main line 211 to form the first type of power line 21, the impedance of the first type of power line 21 can be further reduced, and the power consumption generated by the first type of power line 21 can be reduced. Moreover, since the first main line 211 and the first branch line 212 are distributed in different areas, the wiring difficulty can be reduced. In addition, referring to the above explanation, since the absolute value of the voltage of the first cathode signal received by the first type of power line 21 is the largest, for the first type of power line 21, the first main line 211 and the plurality of first branch lines 212 are electrically connected to reduce the impedance of the first type of power line 21, which can further reduce the power consumption on the cathode power line, and thus further reduce the power consumption of the display panel.

[0074] It should be noted that Figure 8 The cathode layer 33 only includes the first type of cathode 331 and the second type of cathode 332 as an example for illustration. When the cathode layer 33 includes more types and numbers of cathodes, for example, the first type of cathode 331, the second type of cathode 332 and the third type of cathode 333, the first type of power line 21 can also be designed to include multiple branches.

[0075] Fig. 9 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig. 9As shown, optionally, the second type of power line 22 also includes multiple second branch lines 222, the extension directions of the second branch lines 222 and the second main line 221 intersect, and the multiple second branch lines 222 are all electrically connected to the second main line 221; the second main line 221 is located in the non-display area NA, and the second branch lines 222 pass through the display area AA.

[0076] Specifically, by setting a plurality of second branch lines 222 passing through the display area AA, the plurality of second branch lines 222 are electrically connected to the second main line 221 to form a second power line 22, the impedance of the second power line 22 can be reduced, the power consumption generated by the second power line 22 can be reduced, and the power consumption of the display panel can be further reduced. Moreover, since the second main line 221 and the second branch line 222 are distributed in different areas, the wiring difficulty can be reduced.

[0077] like Fig. 9 As shown, optionally, a width d4 of the first branch line 212 is greater than a width d5 ​​of the second branch line 222 .

[0078] Similar to the design concept of the width of the first main line 211 and the second main line 221, by setting the width d3 of the first branch line 212 to be greater than the width d4 of the second branch line 222, the power consumption generated on the cathode power line can be reduced to a greater extent, and the power consumption of the display panel can be reduced to a greater extent.

[0079] Fig.10 is along Fig. 9 A schematic diagram of a cross-sectional structure of a display panel taken from EE', such as Fig. 9 and Fig.10 As shown, optionally, the first branch line 212 and the second branch line 222 are located in the same film layer and extend in the same direction.

[0080] Specifically, refer to Fig. 9 Since the extension direction of the first main line 211 intersects with the extension direction of the first branch line 212, and the extension direction of the second main line 221 intersects with the extension direction of the second branch line 222, the wiring difficulty can be reduced by setting the first main line 211 and the second main line 221 to extend in the same direction, and setting the first branch line 212 and the second branch line 222 to extend in the same direction. Furthermore, the first main line 211 and the second main line 221 with the same extension direction can be set in the same film layer, and the first branch line 212 and the second branch line 222 with the same extension direction can be set in the same film layer. Such a design is conducive to avoiding interference between different routings and reducing the risk of short circuits.

[0081] For example, Fig.10 The schematic diagram shows the structure of some devices of the pixel circuit in the circuit layer 20, such as Fig.10As shown, optionally, the circuit layer 20 includes a first metal layer M1, a capacitor metal layer Mc, a second metal layer M2, and a third metal layer M3, wherein the first metal layer M1 can be used to set structures such as the gate metal GE of the transistor T, the lower plate CE1 of the storage capacitor Cst, and the scan line (for example, the routing for transmitting the above-mentioned Scan1, Scan2, Scan3 and Emit signals), the capacitor metal layer Mc can be used to set structures such as the upper plate CE2 of the storage capacitor Cst and the initialization signal line (transmitting the Vref signal), the second metal layer M2 can be used to set structures such as the source metal SE, the drain metal DE and the PVDD power signal line of the transistor T, and the third metal layer M3 can be used to form a data signal line (transmitting the Data signal).

[0082] Reference Fig. 9 , the first main line 211, the second main line 221, the initialization signal line and the scan line can optionally extend in the same direction, and the first branch line 212, the second branch line 222, the PVDD power signal line and the data signal line can extend in the same direction.

[0083] Furthermore, the first main line 211 and the second main line 221 can be located in the capacitor metal layer Mc, and the first branch line 212 and the second branch line 222 can be located in the third metal layer M3. The first metal layer M1 and the capacitor metal layer Mc both have signal lines extending in the same direction as the first main line 211 and the second main line 221, but since the structure of the capacitor metal layer Mc is relatively simple, the first main line 211 and the second main line 221 are arranged in the capacitor metal layer Mc, which can reduce the wiring difficulty. Similarly, the second metal layer M2 and the third metal layer M3 both have signal lines extending in the same direction as the first branch line 212 and the second branch line 222, but the structure of the third metal layer M3 is relatively simple, and the first branch line 212 and the second branch line 222 are arranged in the third metal layer M3, which is conducive to reducing the wiring difficulty. In addition, since the distance between the capacitor metal layer Mc and the third metal layer M3 is relatively reduced, setting the first main line 211 and the second main line 221 in the capacitor metal layer Mc, and the first branch line 212 and the second branch line 222 in the third metal layer M3 can reduce the difficulty of punching connection.

[0084] Reference Figure 8 The first branch line 212 can also be electrically connected to the first cathode 331 by punching. Such a setting can increase the contact area between the first power line 21 and the first cathode 331, improve the connection reliability, and reduce the voltage drop loss of the first cathode signal during the transmission process, that is, reduce the IR drop of the first power line 21 and reduce power consumption; the punching position can be located in at least one of the display area AA and the non-display area NA, and the number of punchings can be one or more, which is not limited in the embodiment of the present invention. Figure 8The example of multiple holes and some of the holes are located in the display area AA and some of the holes are located in the non-display area NA is used for illustration. Fig. 9 The second branch line 222 may also be electrically connected to the second cathode 332 by punching. The punching position may be located in at least one of the display area AA and the non-display area NA. The number of the punching may be one or more, which is not limited in the embodiment of the present invention.

[0085] It should also be noted that Fig.10 The film layer structure of the display panel shown and the film layer settings where the first main line 211, the second main line 221, the first branch line 212 and the second branch line 222 are located are only for reference. The film layer structure of the circuit layer of the display panel is not limited to this. According to the actual film layer structure, a suitable film layer can be selected for designing the first main line, the second main line, the first branch line and the second branch line. The embodiments of the present invention are not limited to this.

[0086] Fig.11 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig.11 As shown, optionally, the circuit layer 20 includes a plurality of pixel circuits 210 ( Fig.11 A dotted box represents a setting area of ​​a pixel circuit), the pixel circuit 210 includes a first type pixel circuit 2011 and a second type pixel circuit 2012, a plurality of first type pixel circuits 2011 arranged along the extension direction of the first branch line 212 constitute a first circuit group 201, and a plurality of second type pixel circuits 2012 arranged along the extension direction of the second branch line 222 constitute a second circuit group 202; the number of first branch lines 212 is equal to the number of first circuit groups 201; the number of second branch lines 222 is less than or equal to the number of second circuit groups 202.

[0087] Combination Fig. 9 and Fig.11 As shown, the first type of pixel circuit 2011 is used to drive the OLED element corresponding to the first type of light-emitting portion 321 to emit light, and the first type of pixel circuit 2011 can be set in a one-to-one correspondence with the OLED element, and the second type of pixel circuit 2012 is used to drive the OLED element corresponding to the second type of light-emitting portion 322 to emit light, and the second type of pixel circuit 2012 can be set in a one-to-one correspondence with the OLED element.

[0088] Furthermore, for any cathode power line, the more branches connected to the main line, the lower the impedance of the cathode power line and the lower the power consumption. However, since the branch line passes through the display area, and the display area in the circuit layer is provided with a pixel circuit, the structure of the pixel circuit is relatively complex and the free space is limited. Therefore, the number of optional branches is less than or equal to the number of corresponding circuit groups. Specifically, for the first branch line 212, the number of optional first branches 212 is less than or equal to the number of first circuit groups 201. For the second branch line 222, the number of optional second branches 222 is less than or equal to the number of second circuit groups 202. To reduce the difficulty of wiring.

[0089] Further, referring to the above explanation, considering that the first type of power line 21 has a greater impact on power consumption and the second type of power line 22 has a relatively smaller impact on power consumption, therefore, in a specific implementation, for the first branch line 212, the number of the first branch lines 212 can be set equal to the number of the first circuit groups 201 to reduce the impedance of the first type of power line 21 as much as possible, reduce the power consumption generated by the cathode power line 20a as much as possible, and reduce the power consumption of the display panel as much as possible.

[0090] For the second branch lines 222, the number of the second branch lines 222 can be set to be less than or equal to the number of the second circuit groups 202 according to actual design requirements. Fig.11 Take the example that the number of the second branch lines 222 is equal to the number of the second circuit groups 202 for illustration. Fig.12 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig.12 As shown, in other embodiments, the number of the optional second branches 222 is less than the number of the second circuit groups 202 .

[0091] Further, refer to Fig.12 When the number of the second branch lines 222 is less than the number of the second circuit groups 202, the number of the second branch lines 222 can be selected to be half of the number of the second circuit groups 202, and the second branch lines 222 are arranged side by side at equal intervals.

[0092] Such an arrangement can reduce the impedance of the second type power line 22, reduce the power consumption generated by the second type power line 22, and reduce the number of wirings and the difficulty of wiring. In addition, the metal structure inside the panel has a certain reflectivity. By arranging the second branch lines 222 in parallel at equal intervals, the structural uniformity inside the panel can be improved, the visual uniformity can be ensured, and the user experience can be improved.

[0093] Reference Fig.12 Optionally, the orthographic projection of the first branch line 212 on the substrate 10 overlaps with the orthographic projection of the region where the first circuit group 201 is located on the substrate 10 .

[0094] Reference Fig.12 The projection of the area where the first circuit group 201 is located overlaps with the projection of the area where the first type of cathode 331 is located. By setting the first branch line 212 to overlap with the projection of the area where the first circuit group 201 is located, it is convenient for the first branch line 212 to be electrically connected to the first type of cathode 331 through punching, thereby increasing the contact area between the first type of power line 21 and the first type of cathode 331, improving the connection reliability, reducing the IR drop of the first type of power line 21, and reducing power consumption.

[0095] It should be noted that the above pixel circuit 210 includes the first type of pixel circuit 2011 and the second type of pixel circuit 2012. The pixel circuit 210 may include only the first type of pixel circuit 2011 and the second type of pixel circuit 2012. The pixel circuit 210 may include other types of pixel circuits in addition to the first type of pixel circuit 2011 and the second type of pixel circuit 2012. The specific number may be determined according to the number of types of OLED elements. Figure 1 In the case where the display panel shown includes only two types of organic light-emitting parts 320, that is, two types of OLED elements, the pixel circuit 210 may include only a first type of pixel circuit 2011 and a second type of pixel circuit 2012; Figure 5-Figure 9 In the case where the display panel shown includes three types of organic light-emitting parts 320, the pixel circuit 210 may include three types of pixel circuits. The following further describes in detail the arrangement of the second branch line 222 and the structure of the display panel, taking the latter as an example.

[0096] Combination Fig. 9 and Fig.11 As shown, when the organic light-emitting portion includes a first type of light-emitting portion 321, a second type of light-emitting portion 322 and a third type of light-emitting portion 323, optionally, in addition to the first type of pixel circuit 2011 and the second type of pixel circuit 2012, the pixel circuit 210 also includes a third type of pixel circuit 2013, and a plurality of third type of pixel circuits 2013 arranged along the extension direction of the second branch line 222 constitute a third circuit group 203.

[0097] Further, refer to Fig. 9 When a second type cathode 332 covers at least one second type light emitting portion 322 and at least one third type light emitting portion 323, optionally, the orthographic projection of the second branch line 222 on the substrate 10 overlaps with the orthographic projection of the area where the second circuit group 202 is located on the substrate 10 (refer to Fig.11 ), or, the orthographic projection of the second branch line 222 on the substrate 10 overlaps with the orthographic projection of the area where the third circuit group 203 is located on the substrate 10 (refer to Fig.13 , Fig.13 is a schematic diagram of a top view structure of another display panel provided in an embodiment of the present invention).

[0098] Specifically, refer to Figure 11-13 The area where the second type cathode 332 is located overlaps with the areas where the second circuit group 202 and the third circuit group 203 are located at the same time. By setting the second branch line 222 to overlap with the area where the second circuit group 202 is located ( Fig.11 or Fig.12 ), or the second branch line 222 is set to overlap with the projection of the area where the third circuit group 203 is located ( Fig.13 ), it is convenient for the second branch line 222 to be electrically connected to the second type cathode 332 by punching, so as to improve the electrical connection between the second type power line 22 and the second type cathode 332 by punching, thereby increasing the contact area between the second type power line 22 and the second type cathode 332, improving the connection reliability, reducing the IR drop of the second type power line 22, and reducing power consumption.

[0099] Fig.14 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, compared with Figure 7 and Fig.14 , when the cathode layer 33 includes a first type cathode 331, a second type cathode 332 and a third type cathode 333, a first type cathode 331 covers at least one first type light-emitting portion 321, a second type cathode 332 covers at least one second type light-emitting portion 322, a third type cathode 333 covers at least one third type light-emitting portion 323, the cathode power line 20a includes a first type power line 21, a second type power line 22 and a third type power line 23, the first type cathode 331 is electrically connected to the first type power line 21, the second type cathode 332 is electrically connected to the second type power line 22, and the third type cathode 333 is electrically connected to the third type power line 23, optionally, except In addition to the third main line 231, the third type power line 23 also includes a plurality of third branch lines 232, the extension directions of the third branch lines 232 and the third main line 231 intersect, and the plurality of third branch lines 232 are electrically connected to the third main line 231; the third main line 231 is located in the non-display area NA, and the third branch lines 232 pass through the display area AA; the number of the third branch lines 232 is less than or equal to the number of the third circuit groups 203; the orthographic projection of the second branch line 222 on the substrate 10 overlaps with the orthographic projection of the area where the second circuit group 202 is located on the substrate 10; the orthographic projection of the third branch line 232 on the substrate 10 overlaps with the orthographic projection of the area where the third circuit group 203 is located on the substrate 10. The arrangement of the first branch line 212 can refer to the above description.

[0100] Specifically, when the number of types of organic light-emitting parts, the number of types of cathodes, and the number of types of cathode power lines are set one by one, the setting method of the first type of power line 21 and the second type of power line 22 can be referred to, and the third type of power line 23 can be set to be electrically connected by a third main line 231 and multiple third branch lines 232. Such a setting can further reduce the impedance of the third type of power line 23, reduce the power consumption generated by the third type of power line 23, and further reduce the power consumption of the display panel.

[0101] Furthermore, when the number of types of organic light-emitting parts, the number of types of cathodes, and the number of types of cathode power lines are set in a one-to-one correspondence, by setting the first branch line 212 to overlap with the projection of the area where the first circuit group 201 is located, setting the second branch line 222 to overlap with the projection of the area where the second circuit group 202 is located, and setting the third branch line 232 to overlap with the projection of the area where the third circuit group 203 is located, it is convenient to electrically connect each branch line to the corresponding cathode through punching, thereby increasing the contact area between each cathode power line 20a and the corresponding cathode, improving the connection reliability, reducing the IR drop of the cathode power line, and reducing power consumption.

[0102] Reference Fig.14 Optionally, the first branch line 212, the second branch line 222 and the third branch line 232 are located in the same film layer and extend in the same direction. The specific film layer positions can be referred to the above description and will not be repeated here.

[0103] Fig.15 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig.15 As shown, optionally, when the number of the third branch lines 232 is less than the number of the third circuit groups 203, the number of the optional third branch lines 232 is half of the number of the third circuit groups 203, and the third branch lines 232 are arranged side by side at equal intervals. In this way, the impedance of the third type power line 23 can be reduced, the power consumption generated on the third type power line 23 can be reduced, and the number of wirings can be reduced, and the wiring difficulty can be reduced. In addition, by arranging the third branch lines 232 to be arranged side by side at equal intervals, it is conducive to ensuring the uniformity of visual effects.

[0104] Reference Fig.14 Optionally, a width d6 of the third branch line 232 is smaller than a width d4 of the first branch line 212 ; and a width d6 of the third branch line 232 is greater than or equal to a width d5 ​​of the second branch line 222 .

[0105] Similar to the design ideas of the widths of the first main line, the second main line, and the third main line described above, by designing the width of the third branch line to be smaller than the width of the first branch line, and designing the width of the third branch line to be greater than or equal to the width of the second branch line, the power consumption generated on the cathode power line can be reduced to a greater extent, and the power consumption of the display panel can be reduced to a greater extent. Exemplarily, this design can be applicable to the case where the first type of light-emitting portion is a blue light-emitting portion, the second type of light-emitting portion is a green light-emitting portion, and the third type of light-emitting portion is a red light-emitting portion.

[0106] Fig.16 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig.16 As shown, optionally, the first main line 211 includes a first section 211 a and a second section 211 b , and the first section 211 a and the second section 211 b are located at opposite sides of the first branch line 212 .

[0107] With such a configuration, the first cathode signal can be received simultaneously through the first division 211a and the second division 211b, which is beneficial to improving the signal uniformity of the first cathode signal at different positions, and is also beneficial to increasing the contact area between the first type of power line 21 and the first type of cathode, improving the connection reliability, reducing the IR drop of the first type of power line 21, and reducing power consumption.

[0108] It should be noted that if the first main line 211 is located on one side of the first branch line 212, the width of the first main line 211 is d1, and the sum of the widths of the first subsection 211a and the second subsection 211b may be greater than or equal to d1, which is not limited in the embodiment of the present invention. Since the first main line 211 has more areas that can be set, it is convenient to achieve that the sum of the widths of the first subsection 211a and the second subsection 211b is greater than d1, further reducing the impedance of the first type of power line.

[0109] Fig.17 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig.17 As shown, optionally, the second main line 221 includes a third sub-section 221 a and a fourth sub-section 221 b , and the third sub-section 221 a and the fourth sub-section 221 b are located at opposite sides of the second branch line 222 .

[0110] With such a configuration, the second cathode signal can be received simultaneously through the third division 221a and the fourth division 221b, which is beneficial to improving the signal uniformity of the second cathode signal at different positions, and is also beneficial to increasing the contact area between the second power line 22 and the second cathode, improving connection reliability, reducing the IR drop of the second power line 22, and reducing power consumption.

[0111] It should be noted that if the second main line 221 is located on one side of the second branch line 222, the width of the second main line 221 is d2, and the sum of the widths of the third subsection 221a and the fourth subsection 221b can be greater than or equal to d2, which is not limited in the embodiment of the present invention. Since the second main line 221 has more areas that can be set, it is convenient to achieve that the sum of the widths of the third subsection 221a and the fourth subsection 221b is greater than d2, further reducing the impedance of the second type power line.

[0112] Reference Fig.17 Optionally, the third main line 231 includes a fifth sub-section 231 a and a sixth sub-section 231 b , and the fifth sub-section 231 a and the sixth sub-section 231 b are located on opposite sides of the third branch line 232 .

[0113] With such a configuration, the third cathode signal can be received simultaneously through the fifth division 231a and the sixth division 231b, which is beneficial to improving the signal uniformity of the third cathode signal at different positions, and is also beneficial to increasing the contact area between the third power line 23 and the third cathode, improving connection reliability, reducing the IR drop of the third power line 23, and reducing power consumption.

[0114] It should be noted that if the third main line 231 is located on one side of the third branch line 232, the width of the third main line 231 is d3, and the sum of the widths of the fifth subsection 231a and the sixth subsection 231b can be greater than or equal to d3, which is not limited in the embodiment of the present invention. Since the third main line 231 has more areas that can be set, it is convenient to achieve that the sum of the widths of the fifth subsection 231a and the sixth subsection 231b is greater than d3, further reducing the impedance of the third type power line.

[0115] In summary, in the above embodiments, organic light-emitting parts with the same light-emitting color are arranged side by side in the same direction, and organic light-emitting parts with different light-emitting colors are arranged alternately in another intersecting direction. Figure 5 Taking the example that a plurality of first-type light-emitting units 321, a plurality of second-type light-emitting units 322, and a plurality of third-type light-emitting units 323 are arranged side by side in the column direction, and the first-type light-emitting units 321, the second-type light-emitting units 322, and the third-type light-emitting units 323 are arranged alternately in the row direction, the arrangement of the cathode layer and the cathode power line in the display panel is described in detail. As described above, the technical solution of the embodiment of the present invention is not limited by the pixel arrangement method. The technical solution of the embodiment of the present invention is briefly described below by taking another pixel arrangement method as an example.

[0116] For example, Fig.18 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention. Fig.18As shown, taking the first type of light-emitting unit 321 as a blue light-emitting unit, the second type of light-emitting unit 322 as a green light-emitting unit, and the third type of light-emitting unit 323 as a red light-emitting unit as an example, optionally, multiple first type of light-emitting units 321 and third type of light-emitting units 323 constitute a first virtual quadrilateral 61, the center of the first type of light-emitting unit 321 is at the first vertex of the first virtual quadrilateral 61, the center of the third type of light-emitting unit 323 is at the second vertex of the first virtual quadrilateral 61, the first vertex 61 and the second vertex 62 are alternately and spaced apart, that is, the first type of light-emitting unit 321 and the third type of light-emitting unit 323 are respectively located on the diagonals of the first virtual quadrilateral, and the second type of light-emitting unit 322 is inside the first virtual quadrilateral 61; multiple second type of light-emitting units 322 constitute a second virtual quadrilateral 62, the centers of multiple second type of light-emitting units 322 are respectively at the vertices of the second virtual quadrilateral 62, and the first type of light-emitting unit 321 or the third type of light-emitting unit 323 is inside the second virtual quadrilateral 62. At this time, the overall arrangement is similar to the "diamond" pixel arrangement. Through the above arrangement, a good rendering effect can be guaranteed and the color display effect of the display panel can be further improved.

[0117] Correspondingly, the pixel circuit includes a first type of pixel circuit 2011, a second type of pixel circuit 2012 and a third type of pixel circuit 2013. The first type of pixel circuit 2011 is arranged corresponding to the OLED element where the first type of light emitting portion 321 is located, the second type of pixel circuit 2012 is arranged corresponding to the OLED element where the second type of light emitting portion 322 is located, and the third type of pixel circuit 2013 is arranged corresponding to the OLED element where the third type of light emitting portion 323 is located. In particular, based on the arrangement of the above-mentioned organic light emitting portion, the first type of pixel circuit 2011 and the third type of pixel circuit 2013 are alternately arranged along the extension direction of the first branch line 212, and there is an intersection in the area where the first circuit group 201 and the third circuit group 203 are located.

[0118] Further, for the arrangement of the cathode layer and the cathode power line, as Fig.18 As shown, the cathode layer at least includes a first type of cathode 331 and a second type of cathode 332, and the first type of cathode 331 and the second type of cathode 332 are arranged at intervals. The cathode power line 20a in the circuit layer at least includes a first type of power line 21 and a second type of power line 22. The first type of cathode 331 is electrically connected to the first type of power line 21, and the second type of cathode 332 is electrically connected to the second type of power line 22. The first type of power line 21 receives a first cathode signal, and the second type of power line 22 receives a second cathode signal. The absolute value of the voltage of the first cathode signal is greater than the absolute value of the voltage of the second cathode signal. The first type of power line 21 includes a first main line 211, and the second type of power line 22 includes a second main line 221. The width of the first main line 211 is greater than the width of the second main line 221 (indicated by the thickness of the line).

[0119] like Fig.18 As shown, in this embodiment, since each first-type light-emitting portion 321 is arranged at intervals, one first-type cathode 331 can only cover one first-type light-emitting portion 321, and each first-type cathode 331 is arranged at intervals. At this time, the first-type power line 21 can be arranged to include an electrically connected first main line 211 and a first branch line 212, so that the first branch line 212 is electrically connected to the first-type cathode 331 by punching, so as to realize the electrical connection between the first-type cathode 331 and the first-type power line 21.

[0120] like Fig.18 As shown, optionally, one second type cathode 332 covers at least one second type light emitting portion 322 and at least one third type light emitting portion 323 . Fig.18 Take the example of a second type cathode 332 covering multiple second type light emitting parts 322 and multiple third type light emitting parts 323. At this time, the second type power line 22 may only include the second main line 221, or may be composed of the electrically connected second main line 221 and the second branch line 222. Fig.18 The latter is used as an example only. This design is beneficial to reducing the impedance of the second type power line 22 and improving the connection reliability between the second type power line 22 and the second type cathode 332 .

[0121] like Fig.18 As shown, optionally, the number of first branches 212 is equal to the number of first circuit groups 201, and the number of second branches 222 is equal to the number of second circuit groups 202. In other embodiments, the number of second branches 222 may be less than the number of second circuit groups 202. For example, the number of second branches 222 may be half of the number of second circuit groups 202, and the second branches 222 are arranged side by side at equal intervals.

[0122] like Fig.18 As shown, optionally, the orthographic projection of the first branch line 212 on the substrate overlaps with the orthographic projection of the area where the first circuit group 201 is located on the substrate. For the setting position of the first branch line 212, when a second-type cathode 332 covers at least one second-type light-emitting portion 322 and at least one third-type light-emitting portion 323, optionally, the orthographic projection of the second branch line 222 on the substrate overlaps with the orthographic projection of the area where the second circuit group 202 is located on the substrate (refer to Fig.18 In other embodiments, the orthographic projection of the second branch line 222 on the substrate may be arranged to overlap with the orthographic projection of the region where the third circuit group 203 is located on the substrate. Fig.18 By arranging the second branch line 222 to overlap with the area where the second circuit group 202 is located, it is helpful to reduce the wiring difficulty.

[0123] Reference Fig.18Optionally, the width of the first branch line 212 is greater than the width of the second branch line 222 (illustrated by line thickness). In addition, optionally, the first branch line 212 and the second branch line 222 are located in the same film layer and extend in the same direction.

[0124] Fig.19 is a schematic diagram of a top view of another display panel provided by an embodiment of the present invention, Fig.18 The pixel arrangement in the display panel shown is the same, except that the cathode layer includes not only the first type cathode 331 and the second type cathode 332, but also the third type cathode 333. Fig.19 As shown, a first-type cathode 331 covers a first-type light-emitting portion 321, a second-type cathode 332 covers a plurality of second-type light-emitting portions 322, and a third-type cathode 333 covers a third-type light-emitting portion 323. The first-type cathode 331, the second-type cathode 332, and the third-type cathode 333 are arranged at intervals. Accordingly, the cathode power line includes not only the first-type power line 21 and the second-type power line 22, but also the third-type power line 23. The third-type cathode 333 is electrically connected to the third-type power line 23. The third-type power line 23 receives a third cathode signal. The absolute value of the voltage of the third cathode signal is less than the absolute value of the voltage of the first cathode signal. The third-type power line 23 includes a third main line 231. The width of the third main line 231 is less than the width of the first main line 211 (indicated by the thickness of the line).

[0125] like Fig.19 As shown, in this embodiment, since each third type light emitting portion 323 is arranged at intervals, one third type cathode 333 can only cover one third type light emitting portion 323, and each third type cathode 333 is arranged at intervals. At this time, the third type power line 23 can be arranged to include an electrically connected third main line 231 and a third branch line 232, so that the third branch line 232 and the third type cathode 333 are electrically connected by punching, so as to realize the electrical connection between the third type cathode 333 and the third type power line 23. Optionally, the width of the third branch line 232 is smaller than the width of the first branch line 212 (indicated by the thickness of the line).

[0126] like Fig.19 As shown, when the cathode and cathode power lines corresponding to the second type light emitting portion 322 and the third type light emitting portion 323 are independently arranged, optionally, the number of the third branch lines 232 is less than or equal to the number of the third circuit group 203 ( Fig.19 The two are equal for illustration only), in addition, the orthographic projection of the second branch line 222 on the substrate 10 can optionally overlap with the orthographic projection of the area where the second circuit group 202 is located on the substrate 10, and the orthographic projection of the third branch line 232 on the substrate 10 can overlap with the orthographic projection of the area where the third circuit group 203 is located on the substrate 10.

[0127] Reference Fig.19 When the first type of light-emitting unit 321 is a blue light-emitting unit, the second type of light-emitting unit 322 is a green light-emitting unit, and the third type of light-emitting unit 323 is a red light-emitting unit, the absolute value of the voltage of the third cathode signal can be greater than or equal to the absolute value of the voltage of the second cathode signal, the width of the third main line 231 is greater than or equal to the width of the second main line 221, and the width of the third branch line 232 is greater than or equal to the width of the second branch line 222. The embodiment of the present invention does not limit this. The embodiment of the present invention does not limit this.

[0128] In addition, it should be noted that Fig.18 and Fig.19 Only the first main line 211 is located on one side of the first branch line 212 as an example for illustration. Fig.17 Optionally, the first main line 211 includes a first sub-portion 211a and a second sub-portion 211b located on opposite sides of the first branch line 212. Fig.17 In other embodiments, the optional second main line 221 includes a third sub-section 221a and a fourth sub-section 221b located on opposite sides of the second branch line 222 , and the third main line 231 includes a fifth sub-section 231a and a sixth sub-section 231b located on opposite sides of the third branch line 232 .

[0129] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Fig. 20 is a schematic diagram of the structure of a display device provided by an embodiment of the present invention, such as Fig. 20 As shown, the display device 200 includes the display panel 100 provided in any of the above embodiments, and thus has the same beneficial effects as the above display panel. The same points can be found in the description of the above embodiments, which will not be repeated here. The display device 200 can be an OLED display device. In addition, the display device 200 provided in the embodiment of the present invention can be Fig. 20 The mobile phone shown can also be any electronic product with a display function, including but not limited to the following categories: televisions, laptops, desktop displays, tablet computers, digital cameras, smart bracelets, smart glasses, car displays, medical equipment, industrial control equipment, touch interactive terminals, etc. The embodiments of the present invention do not specifically limit this.

[0130] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; A circuit layer, located on one side of the substrate; A cathode layer is located on a side of the circuit layer away from the substrate; the cathode layer comprises at least a first type of cathode and a second type of cathode, and the first type of cathode and the second type of cathode are arranged at intervals; The circuit layer includes a cathode power line; the cathode power line includes at least a first type of power line and a second type of power line; the first type of cathode is electrically connected to the first type of power line, and the second type of cathode is electrically connected to the second type of power line; the first type of power line receives a first cathode signal, and the second type of power line receives a second cathode signal, and the absolute value of the voltage of the first cathode signal is greater than the absolute value of the voltage of the second cathode signal; the first type of power line includes a first main line, and the second type of power line includes a second main line, and the width of the first main line is greater than the width of the second main line.

2. The display panel according to claim 1, characterized in that: The display panel further includes: an anode layer, located on a side of the circuit layer away from the substrate; The organic light-emitting layer is located on a side of the anode layer away from the substrate; the cathode layer is located on a side of the organic light-emitting layer away from the substrate; The organic light-emitting layer includes a plurality of organic light-emitting parts, and the organic light-emitting parts include at least a first type of light-emitting part and a second type of light-emitting part with different light-emitting colors. A first type of cathode covers at least one of the first type of light-emitting parts, and a second type of cathode covers at least one of the second type of light-emitting parts.

3. The display panel according to claim 2, characterized in that: The organic light-emitting portion further includes a third type of light-emitting portion, and the light-emitting color of the third type of light-emitting portion is different from the light-emitting color of the first type of light-emitting portion and the light-emitting color of the second type of light-emitting portion; One second-type cathode covers at least one second-type light-emitting portion and at least one third-type light-emitting portion.

4. The display panel according to claim 3, characterized in that: The first type of light-emitting portion is a blue light-emitting portion; one of the second type of light-emitting portion and the third type of light-emitting portion is a green light-emitting portion, and the other is a red light-emitting portion.

5. The display panel according to claim 2, characterized in that: The organic light-emitting portion further includes a third type of light-emitting portion, and the light-emitting color of the third type of light-emitting portion is different from the light-emitting color of the first type of light-emitting portion and the light-emitting color of the second type of light-emitting portion; The cathode layer further includes a third type of cathode, the third type of cathode and the first type of cathode are arranged at intervals, and the third type of cathode and the second type of cathode are arranged at intervals; one third type of cathode covers at least one third type of light emitting portion; The cathode power line also includes a third type of power line, and the third type of cathode is electrically connected to the third type of power line; the third type of power line receives a third cathode signal, and the absolute value of the voltage of the third cathode signal is smaller than the absolute value of the voltage of the first cathode signal; the third type of power line includes a third main line, and the width of the third main line is smaller than the width of the first main line.

6. The display panel according to claim 5, characterized in that: The first type of light emitting unit is a blue light emitting unit; the second type of light emitting unit is a green light emitting unit, and the third type of light emitting unit is a red light emitting unit; The absolute value of the voltage of the third cathode signal is greater than or equal to the absolute value of the voltage of the second cathode signal; The width of the third main line is greater than or equal to the width of the second main line.

7. The display panel according to claim 2, characterized in that: The first type of power line also includes a plurality of first branch lines, the first branch lines and the first main line extend in a direction intersecting each other, and the plurality of first branch lines are electrically connected to the first main line; The display panel includes a display area and a non-display area located at least on one side of the display area. The first main line is located in the non-display area, and the first branch line passes through the display area.

8. The display panel according to claim 7, characterized in that: The first main line includes a first section and a second section, and the first section and the second section are located at opposite sides of the first branch line.

9. The display panel according to claim 7, characterized in that: The second type of power line further includes a plurality of second branch lines, the second branch lines and the second main line extend in a direction intersecting each other, and the plurality of second branch lines are electrically connected to the second main line; The display panel includes a display area and a non-display area located at least on one side of the display area. The second main line is located in the non-display area, and the second branch line passes through the display area.

10. The display panel according to claim 9, characterized in that: The second main line includes a third section and a fourth section, and the third section and the fourth section are located at opposite sides of the second branch line.

11. The display panel according to claim 9, characterized in that: The width of the first branch line is greater than the width of the second branch line.

12. The display panel according to claim 9, characterized in that: The first branch line and the second branch line are located in the same film layer and extend in the same direction.

13. The display panel according to claim 9, characterized in that: The circuit layer includes a plurality of pixel circuits, the pixel circuits include a first type of pixel circuits and a second type of pixel circuits, a plurality of the first type of pixel circuits arranged along the extension direction of the first branch line constitute a first circuit group, and a plurality of the second type of pixel circuits arranged along the extension direction of the second branch line constitute a second circuit group; The number of the first branches is equal to the number of the first circuit groups; the number of the second branches is less than or equal to the number of the second circuit groups.

14. The display panel according to claim 13, characterized in that: The number of the second branch lines is half of the number of the second circuit groups, and the second branch lines are arranged side by side at equal intervals.

15. The display panel according to claim 13, characterized in that: The orthographic projection of the first branch line on the substrate overlaps with the orthographic projection of the region where the first circuit group is located on the substrate.

16. The display panel according to claim 13, characterized in that: The organic light-emitting portion includes a third type of light-emitting portion, and one of the second type of cathodes covers at least one of the second type of light-emitting portion and at least one of the third type of light-emitting portion; The pixel circuit further includes a third type of pixel circuit, and a plurality of the third type of pixel circuits arranged along the extension direction of the second branch line constitute a third circuit group; The orthographic projection of the second branch line on the substrate overlaps with the orthographic projection of the area where the second circuit group is located on the substrate, or the orthographic projection of the second branch line on the substrate overlaps with the orthographic projection of the area where the third circuit group is located on the substrate.

17. The display panel according to claim 13, characterized in that: The organic light-emitting portion includes a third type of light-emitting portion, the cathode layer includes a third type of cathode, one of the third type of cathodes covers at least one of the third type of light-emitting portions, the cathode power line includes a third type of power line, the third type of cathode is electrically connected to the third type of power line; the third type of power line includes a third main line; The third type of power line further includes a plurality of third branch lines, the third branch lines and the third main line extend in a direction intersecting each other, and the plurality of third branch lines are electrically connected to the third main line; the third main line is located in the non-display area, and the third branch lines pass through the display area; The pixel circuit further includes a third type of pixel circuit, and a plurality of the third type of pixel circuits arranged along the extension direction of the third branch line constitute a third circuit group; the number of the third branch lines is less than or equal to the number of the third circuit group; The orthographic projection of the second branch line on the substrate overlaps with the orthographic projection of the area where the second circuit group is located on the substrate; The orthographic projection of the third branch line on the substrate overlaps with the orthographic projection of the region where the third circuit group is located on the substrate.

18. The display panel according to claim 17, characterized in that: The width of the third branch line is smaller than the width of the first branch line; The width of the third branch line is greater than or equal to the width of the second branch line.

19. The display panel according to claim 17, characterized in that: The third main line includes a fifth sub-section and a sixth sub-section, and the fifth sub-section and the sixth sub-section are located on opposite sides of the third branch line.

20. A display device, characterized in that: A display panel comprising any one of claims 1-19.

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