Display panel, control method thereof, and display device

Abstract

Provided are a display panel and a control method thereof, and a display device, and belong to the technical field of display. At least one pixel in the display panel comprises a plurality of sub-pixel groups, at least one sub-pixel group comprises a plurality of sub-pixels of the same color, and each sub-pixel comprises a driving circuit, a compensation circuit, a light-emitting element and a shielding circuit. The driving circuit and the compensation circuit can control the light-emitting element to emit light. The shielding circuit can be connected in series with any light-emitting channel of the light-emitting element, and is used for cutting off the light-emitting channel when a dark spot occurs in the light-emitting element. In this way, the dark spot defect problem of the display panel can be reliably solved by the cooperation of the above-mentioned circuits and timing setting, and when a dark spot occurs in a sub-pixel of a certain color, other sub-pixels of the same color can be driven to emit light, so that the display effect is ensured to be good. The product yield of the display panel provided by the present disclosure is good.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display panel and its control method and display device. Background Technology

[0002] In recent years, large-size top-emitting transparent organic light-emitting diode (OLED) display panels have become a research hotspot due to their advantages such as large aperture ratio and clear image quality.

[0003] Currently, transparent OLED display panels generally include: a substrate, and multiple pixels located on the substrate. Each pixel includes multiple sub-pixels, such as typically three sub-pixels: a red sub-pixel, a blue sub-pixel, and a green sub-pixel. Each sub-pixel includes pixel circuitry and an OLED light-emitting element. The pixel circuitry is used to drive the OLED light-emitting element to emit light. Furthermore, the OLED light-emitting element includes an anode layer, a light-emitting layer, and a cathode layer stacked sequentially in a direction away from the substrate. The cathode layer is often formed using a sputtering process.

[0004] However, due to the influence of the sputter process, the cathode layer formed at present is prone to abnormal problems such as particles, which leads to direct connection between the cathode layer and the anode layer, resulting in dark spot defects in OLED light-emitting elements and poor product yield. Summary of the Invention

[0005] A display panel and its control method and display device are provided, which can solve the problem of poor product yield caused by dark spot defects in OLED light-emitting elements in related technologies.

[0006] The technical solution is as follows:

[0007] On one hand, a display panel is provided, the display panel comprising:

[0008] Substrate, and multiple pixels located on the substrate;

[0009] Wherein, at least one of the pixels comprises a plurality of sub-pixel groups, and at least one of the sub-pixel groups comprises a plurality of sub-pixels of the same color, each of the sub-pixels comprising:

[0010] The driving circuit is coupled to the first control line, the data line, the first power line and the first node respectively, and is used to control the on / off state of the first power line and the first node based on the first control signal provided by the first control line and the data signal provided by the data line, and to control the potential of the first node based on the data signal and the first power signal provided by the first power line.

[0011] The compensation circuit is coupled to the second control line, the sensing line and the first node respectively, and is used to control the connection and disconnection of the sensing line and the first node based on the second control signal provided by the second control line;

[0012] The light-emitting element is coupled to the first node and the second power line respectively, and is used to emit light based on the potential of the first node and the second power signal provided by the second power line;

[0013] Additionally, a shielding circuit, connected in series with any of the light-emitting channels, is used to cut off the light-emitting channel when a dark spot appears on the light-emitting element. The light-emitting channel includes a first light-emitting channel and a second light-emitting channel. The first light-emitting channel includes a channel where the first power line is coupled to the light-emitting element, and the second light-emitting channel includes a channel where the sensing line is coupled to the light-emitting element.

[0014] Optionally, the driving circuit includes:

[0015] The data writing sub-circuit is coupled to the first control line, the data line and the second node respectively, and is used to control the connection and disconnection of the data line and the second node based on the first control signal provided by the first control line;

[0016] A driving sub-circuit is coupled to the second node, the first power line and the first node respectively, and is used to control the on / off state of the first power line and the first node based on the potential of the second node, and to control the potential of the first node based on the potential of the second node and the first power signal.

[0017] The regulating sub-circuit is coupled to the second node and the first node respectively, and is used to regulate the potential of the other node based on the potential of one of the first node and the second node;

[0018] The first light-emitting channel also includes the driving sub-circuit.

[0019] Optionally, the shielding circuit is connected in series between the first power line and the driving sub-circuit.

[0020] Optionally, the data writing sub-circuit includes a data writing transistor; the driving sub-circuit includes a driving transistor; the adjustment sub-circuit includes a storage capacitor; and the compensation circuit includes a compensation transistor.

[0021] The control electrode of the data writing transistor is coupled to the first control line, the first electrode of the data writing transistor is coupled to the data line, and the second electrode of the data writing transistor is coupled to the second node.

[0022] The control electrode of the driving transistor is coupled to the second node, the first electrode of the driving transistor is coupled to one end of the shielding circuit, the other end of the shielding circuit is coupled to the first power line, and the second electrode of the driving transistor is coupled to the first node.

[0023] One end of the storage capacitor is coupled to the first node, and the other end of the storage capacitor is coupled to the second node;

[0024] The gate of the compensation transistor is coupled to the second control line, the first electrode of the compensation transistor is coupled to the sensing line, and the second electrode of the compensation transistor is coupled to the first node.

[0025] Optionally, the second light-emitting channel further includes the compensation circuit, and the shielding circuit is connected in series between the light-emitting element and the compensation circuit.

[0026] Optionally, the data writing sub-circuit includes a data writing transistor; the driving sub-circuit includes a driving transistor; the adjustment sub-circuit includes a storage capacitor; and the compensation circuit includes a compensation transistor.

[0027] The control electrode of the data writing transistor is coupled to the first control line, the first electrode of the data writing transistor is coupled to the data line, and the second electrode of the data writing transistor is coupled to the second node.

[0028] The control electrode of the driving transistor is coupled to the second node, the first electrode of the driving transistor is coupled to the first power line, and the second electrode of the driving transistor is coupled to the first node.

[0029] One end of the storage capacitor is coupled to the first node, and the other end of the storage capacitor is coupled to the second node;

[0030] The control electrode of the compensation transistor is coupled to the second control line, the first electrode of the compensation transistor is coupled to the sensing line, the second electrode of the compensation transistor is coupled to one end of the shielding circuit, and the other end of the shielding circuit is coupled to the first node.

[0031] Optionally, the shielding circuit includes a shielding resistor.

[0032] Optionally, in a direction parallel to the bearing surface of the substrate, at least one end of the shielding resistor includes a partition structure, the partition structure including a groove recessed inward toward one side of the shielding resistor in a direction perpendicular to the substrate.

[0033] Optionally, in a direction parallel to the bearing surface of the substrate, the shielding resistor includes: a first structure and a second structure;

[0034] Wherein, the distance between the side of the second structure away from the substrate and the substrate is greater than the distance between the side of the first structure away from the substrate and the substrate.

[0035] Optionally, the first structure is located on both sides of the second structure and is used to connect the second structure in series with any light-emitting channel;

[0036] The first structure includes the partition structure, and in a direction parallel to the bearing surface of the substrate, both sides of the first structure include grooves that are recessed toward the center of the first structure.

[0037] Optionally, the first structure includes: multiple first film layers stacked sequentially in a direction away from the substrate; the second structure includes multiple second film layers stacked sequentially in a direction away from the substrate; and at least one of the multiple first film layers and the multiple second film layers is located in the same layer as the film layer included in the sub-pixel.

[0038] Optionally, the sub-pixel includes: a gate metal layer, a source / drain metal layer, a planarization layer, an anode layer, a pixel definition layer, a light-emitting layer, and a cathode layer stacked sequentially along a direction away from the substrate, wherein the cathode layer and the anode layer are both made of transparent materials;

[0039] The first structure includes five first film layers, wherein the materials of the first and third first film layers are the same as the material of the anode layer, the material of the second first film layer is the same as the material of the gate metal layer, the fourth first film layer is located in the same layer as the light-emitting layer, and the fifth first film layer is located in the same layer as the cathode layer, and the first structure overlaps with the source and drain metal layers through a transition hole;

[0040] The second structure includes three second film layers, wherein the first second film layer is located in the same layer as the planarization layer, the second second film layer is located in the same layer as the light-emitting layer, and the third first film layer is located in the same layer as the cathode layer.

[0041] Optionally, the plurality of pixel arrays are arranged in a manner such that, in the direction of pixel columns, the plurality of subpixels in each pair of adjacent subpixel groups are arranged alternately.

[0042] On the other hand, a control method for a display panel is provided, applied to a display panel as described in the above aspect, wherein the shielding circuit of a sub-pixel is connected in series in a first light-emitting channel coupled to a first power line and a light-emitting element in the display panel; the method includes:

[0043] If it is determined that the display panel does not have any dark spot defects, a first power signal with a first potential is provided to the first power line, and a second power signal with a second potential is provided to the second power line.

[0044] If it is determined that the display panel has a dark spot defect, a first power signal with a second potential is provided to the first power line, and a second power signal with a first potential is provided to the second power line.

[0045] Furthermore, when it is determined that the display panel has a dark spot defect, a first control signal with a first potential is provided to the first control line, a second control signal with a second potential is provided to the second control line, and a data signal with a first potential is provided to the data line. Based on the first control signal and the data signal, the driving circuit controls the first power line to be connected to the first node, and the compensation circuit controls the sensing line to be disconnected from the first node based on the second control signal.

[0046] In another aspect, a control method for a display panel is provided, applied to a display panel as described in the above aspect, wherein the shielding circuit of a sub-pixel is connected in series in a second light-emitting channel coupled to a sensing line and a light-emitting element; the method includes:

[0047] If it is determined that the display panel does not have any dark spot defects, a first power signal with a first potential is provided to the first power line, and a second power signal with a second potential is provided to the second power line.

[0048] If it is determined that the display panel has a dark spot defect, a first power signal with a second potential is provided to the first power line, and a second power signal with a first potential is provided to the second power line.

[0049] Furthermore, when it is determined that the display panel has a dark spot defect, a sensing signal with a second potential is provided to the sensing line, a first control signal with a first potential and a second potential is sequentially provided to the first control line, a second control signal with a first potential is provided to the second control line, and a data signal with a second potential is provided to the data line. Based on the first control signal and the data signal, the driving circuit controls the first power line to disconnect from the first node, and the compensation circuit controls the sensing line to conduct to the first node based on the second control signal.

[0050] In another aspect, a display device is provided, the display device comprising: a power supply component, and a display panel as described in the preceding aspect;

[0051] The power supply component is coupled to the display panel and is used to supply power to the display panel.

[0052] In summary, the beneficial effects of the technical solutions provided by the embodiments of this disclosure can at least include:

[0053] A display panel and its control method and display device are provided. At least one pixel in the display panel includes multiple sub-pixel groups, and each sub-pixel group includes multiple sub-pixels of the same color. Each sub-pixel includes a driving circuit, a compensation circuit, a light-emitting element, and a shielding circuit. The driving circuit and compensation circuit can control the light-emitting element to emit light. The shielding circuit can be connected in series with any one of the multiple light-emitting channels of the light-emitting element to cut off the light-emitting channel when a dark spot appears in the light-emitting element. Thus, the problem of dark spot defects in the display panel can be reliably solved by using the above circuit in conjunction with timing settings. Furthermore, when a dark spot appears in a sub-pixel of a certain color within a pixel, other sub-pixels of the same color can be driven to emit light, ensuring better display performance. The display panel provided in this embodiment has a high product yield. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this disclosure;

[0056] Figure 2 This is a schematic diagram of a sub-pixel group structure provided in an embodiment of this disclosure;

[0057] Figure 3 This is a schematic diagram of another sub-pixel group structure provided in an embodiment of this disclosure;

[0058] Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of this disclosure;

[0059] Figure 5 Is Figure 2 Based on this, a schematic diagram of another sub-pixel group structure is provided;

[0060] Figure 6 Is Figure 3 Based on this, another structural diagram of a sub-pixel group is provided;

[0061] Figure 7 Is Figure 5 Based on this, a schematic diagram of a sub-pixel group circuit structure is provided;

[0062] Figure 8 Is Figure 6 Based on this, a schematic diagram of another sub-pixel group circuit structure is provided;

[0063] Figure 9 Is Figure 7 Based on this, a schematic diagram of a pixel circuit structure is provided;

[0064] Figure 10 Is Figure 8 Based on this, a schematic diagram of another pixel circuit structure is provided;

[0065] Figure 11 This is a schematic diagram of the film layer of the shielding resistor portion in a display panel provided in an embodiment of this disclosure;

[0066] Figure 12 Is Figure 11 Based on this, a schematic diagram of a dark spot at the burn-out location of the shielding resistor is provided;

[0067] Figure 13 Is Figure 11 Based on this, a schematic diagram is provided showing another dark spot at the location where the shielding resistor is burned out;

[0068] Figure 14 Is Figure 2 Based on this, a flowchart of a control method for a display panel is provided;

[0069] Figure 15 Is Figure 14 Based on this, a signal timing diagram for a display panel is provided;

[0070] Figure 16 Is Figure 5 Based on this, a schematic diagram is provided showing the burn-off location when there is a dark spot defect;

[0071] Figure 17 Is Figure 5 Based on this, a schematic diagram of the burn-off location is provided for another type of dark spot defect;

[0072] Figure 18 Is Figure 3 Based on this, a flowchart of another control method for the display panel is provided;

[0073] Figure 19 Is Figure 18 Based on this, another signal timing diagram for a display panel is provided;

[0074] Figure 20 Is Figure 6 Based on this, a schematic diagram is provided showing the burn-off location when there is a dark spot defect;

[0075] Figure 21 Is Figure 6 Based on this, a schematic diagram of the burn-off location is provided for another type of dark spot defect;

[0076] Figure 22 This is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0077] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0078] It should be noted that the transistors used in all embodiments of this disclosure can be thin-film transistors, field-effect transistors, or other devices with similar characteristics. Based on their function in the circuit, the transistors used in the embodiments of this disclosure are mainly switching transistors. Since the source and drain of the switching transistors used here are symmetrical, their source and drain are interchangeable. In the embodiments of this disclosure, the source is referred to as the first electrode, and the drain as the second electrode. According to the configuration shown in the accompanying drawings, the middle terminal of the transistor is designated as the control electrode, also known as the gate; the signal input terminal is the source; and the signal output terminal is the drain. Furthermore, the switching transistors used in the embodiments of this disclosure can include either P-type or N-type switching transistors. A P-type switching transistor conducts when the gate is low and is cut off when the gate is high, while an N-type switching transistor conducts when the gate is high and is cut off when the gate is low. Additionally, multiple signals in various embodiments of this disclosure correspond to a first potential and a second potential. The first potential and the second potential only represent that the signal has two potential states and do not represent that the first potential or the second potential has a specific value throughout the text.

[0079] Currently, to address the dark spot defect in the light-emitting elements of transparent display panels, the common approach is to design an aging timing sequence in conjunction with the current 3T1C Two Gate (i.e., including three transistors and one capacitor, coupled to two gate lines) pixel circuit structure to burn off the particles at the dark spots. However, testing has shown that this method still results in a significant number of residual dark spots in the transparent display panel, making reliable burning off impossible and thus failing to meet mass production requirements. Therefore, this disclosure provides a display panel that can automatically disconnect numerous dark spots, shielding the large currents caused by these dark spots and preventing the large currents from affecting product reliability. This improves the lifespan of the display panel and meets mass production requirements.

[0080] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this disclosure. Figure 1 As shown, the display panel includes a substrate 01 and a plurality of pixels 02 located on the substrate 01.

[0081] Wherein, at least one pixel 02 includes a plurality of sub-pixel groups 02Z, and at least one sub-pixel group 02Z includes a plurality of sub-pixels 021 of the same color. Furthermore, in some embodiments, the sub-pixels 021 included in each sub-pixel group 02Z of at least one pixel 02 have different colors.

[0082] For example, regarding two sub-pixel groups 02Z within a pixel 02, one sub-pixel group 02Z may include multiple sub-pixels 021 that are all red, while the other sub-pixel group 02Z may include multiple sub-pixels 021 that are all green. That is, pixel 02 may include multiple red sub-pixels 021 and multiple green sub-pixels 021. Of course, in some other embodiments, a pixel 02 may also contain at least two sub-pixel groups 02Z that include sub-pixels 021 of the same color.

[0083] In current traditional display panels, taking red subpixel 021 and green subpixel 021 as examples, each pixel 02 generally includes only one red subpixel 021 and one green subpixel 021, meaning there is no concept of a subpixel group 02Z. Therefore, based on the above embodiments, this disclosure embodiment can employ a subpixel segmentation method to divide a traditional subpixel 021 into multiple subpixels 021. In this way, the illumination of multiple subpixels 021 of the same color within a single pixel 02 can be controlled individually. Furthermore, if a subpixel 021 of the same color exhibits a dark spot and cannot emit light normally, the other subpixels 021 besides the one that cannot emit light normally can be controlled to reliably emit light, ensuring normal grayscale display and a better display effect for the display panel.

[0084] exist Figure 1 Based on this, taking sub-pixel group 02Z within pixel 02 as an example, continue to refer to... Figure 2 and Figure 3 As shown in the schematic diagram of the sub-pixel structure, each sub-pixel 021 includes: a driving circuit 0211, a compensation circuit 0212, a light-emitting element 0213, and a shielding circuit 0214. The driving circuit 0211, the compensation circuit 0212, and the shielding circuit 0214 can be collectively referred to as the pixel circuit.

[0085] The driving circuit 0211 is coupled to the first control line Gate1 (also known as the first gate line), the data line Data, the first power line VDD, and the first node S1. The driving circuit 0211 controls the connection and disconnection of the first power line VDD and the first node S1 based on the first control signal provided by the first control line Gate1 and the data signal provided by the data line Data, and controls the potential of the first node S1 based on the data signal and the first power signal provided by the first power line VDD.

[0086] For example, the drive circuit 0211 can control the first power line VDD to conduct with the first node S1 when the potential of the first control signal provided by the first control line Gate1 is at the first potential and the potential of the data signal provided by the data line Data is at the first potential. Furthermore, the drive circuit 0211 can generate a drive signal based on the data signal at the first potential and the first power signal provided by the first power line VDD, and transmit it to the first node S1. The drive circuit 0211 can also control the first power line VDD to disconnect from the first node S1 when the potential of the first control signal provided by the first control line Gate1 is at the second potential, and / or when the potential of the data signal provided by the data line Data is at the second potential.

[0087] Optionally, in this embodiment of the disclosure, the first potential can be an effective potential, the second potential can be an ineffective potential, and the effective potential can be a higher potential relative to the ineffective potential. Of course, in some other embodiments, the effective potential can also be a lower potential relative to the ineffective potential.

[0088] The compensation circuit 0212 is coupled to the second control line Gate2 (also referred to as the second gate line), the sensing line Sense, and the first node S1, respectively. The compensation circuit 0212 is used to control the on / off state of the sensing line Sense and the first node S1 based on the second control signal provided by the second control line Gate2.

[0089] For example, the compensation circuit 0212 can control the sensing line Sense to conduct with the first node S1 when the potential of the second control signal provided by the second control line Gate2 is the first potential. At this time, the sensing line Sense can transmit a sensing signal to the first node S1; or, the sensing line Sense can acquire the potential of the first node S1. The sensing signal is generally used to reset the first node S1. The potential of the first node S1 acquired by the sensing line Sense can be used by the source drive circuit to compensate for the data signal.

[0090] The light-emitting element 0213 is coupled to the first node S1 and the second power line VSS. The light-emitting element 0213 is used to emit light based on the potential of the first node S1 and the second power signal provided by the second power line VSS.

[0091] For example, the light-emitting element 0213 can emit light under the voltage difference between the driving signal received by the first node S1 and the second power signal provided by the second power line VSS.

[0092] Optional, see reference Figure 2 It can also be seen that the light-emitting element 0213 can be coupled to the first node S1 through its anode and to the second power line VSS through its cathode. Based on this, the light-emitting element 0213 can reliably emit light when the potential of the driving signal received by the first node S1 is greater than the potential of the second power signal.

[0093] Since the driving signal is generated based on the first power signal provided by the first power line VDD, it can be known that when the potential of the first power signal provided by the first power line VDD is greater than the potential of the second power signal provided by the second power line VSS (i.e., the potential of the first power signal is the first potential and the potential of the second power signal is the second potential), the light-emitting element 0213 can be considered to be loaded with a forward voltage and reliably emit light. Conversely, when the potential of the first power signal is the second potential and the potential of the second power signal is the first potential (i.e., the potential of the first power signal is less than the potential of the second power signal), the light-emitting element 0213 can be considered to be loaded with a reverse voltage. Similarly, when the sensing signal transmitted from the sensing line Sense to the first node S1 is at the second potential and the potential of the second power signal is at the first potential (i.e., the potential of the sensing signal is less than the potential of the second power signal), the light-emitting element 0213 can be considered to be loaded with a reverse voltage. In other words, if the potential of the first node S1 is less than the potential of the second power signal, the light-emitting element 0213 can be considered to be loaded with a reverse voltage.

[0094] Furthermore, the shielding circuit 0214 is connected in series with any of the light-emitting channels. Optionally, in embodiments of this disclosure, the light-emitting channel may include the following first light-emitting channel and second light-emitting channel:

[0095] The first light-emitting channel includes a channel where the first power line VDD is coupled to the light-emitting element 0213. That is, the first power line VDD is coupled to the light-emitting element 0213 through the driving circuit 0211.

[0096] The second light-emitting channel includes the channel where the sensing line Sense is coupled to the light-emitting element 0213. That is, the channel where the sensing line Sense is coupled to the light-emitting element 0213 through the compensation circuit 0212.

[0097] For example, refer to Figure 2The shielding circuit 0214 shown is connected in series in the first light-emitting channel, which is coupled to the first power line VDD and the light-emitting element 0213. For example, it can be connected in series between the first power line VDD and the driving circuit 0211, with one end coupled to the first power line VDD and the other end coupled to the driving circuit 0211, so as to indirectly couple to the light-emitting element 0213 through the driving circuit 0211. Of course, in some other embodiments, the shielding circuit 0214 can also be connected in series between the driving circuit 0211 and the light-emitting element 0213, so as to indirectly couple to the first power line VDD through the driving circuit 0211.

[0098] For example, refer to Figure 3 The shielding circuit 0214 shown is connected in series in the second light-emitting channel where the sensing line Sense is coupled to the light-emitting element 0213. For example, it can be connected in series between the compensation circuit 0212 and the light-emitting element 0213, with one end coupled to the compensation circuit 0212 and the other end coupled to the light-emitting element 0213, so as to indirectly couple to the sensing line Sense through the compensation circuit 0212. Of course, in some other embodiments, the shielding circuit 0214 can also be connected in series between the compensation circuit 0212 and the sensing line Sense, so as to indirectly couple to the light-emitting element 0213 through the compensation circuit 0212.

[0099] Combination Figure 2 and Figure 3 In this embodiment of the disclosure, the shielding circuit 0214 can be used to cut off the light-emitting channel when a dark spot appears in the light-emitting element 0213. Here, the light-emitting channel refers to the light-emitting channel where the shielding circuit 0214 is located. For example, for... Figure 2 In the structure shown, the shielding circuit 0214, connected in series with the first power line VDD and the first light-emitting channel coupled to the light-emitting element 0213, can be used to cut off the first light-emitting channel when a dark spot appears in the light-emitting element 0213. Similarly, for Figure 3 In the structure shown, the shielding circuit 0214 connected in series with the second light-emitting channel coupled to the sensing line Sense and the light-emitting element 0213 can be used to cut off the second light-emitting channel when a dark spot appears in the light-emitting element 0213.

[0100] Furthermore, with Figure 3Taking the structure shown as an example, the principle of cutting off the light-emitting channel based on the above embodiment is briefly explained as follows: When a dark spot appears on the display panel, a reverse voltage can be applied to each light-emitting element 0213. At this time, the light-emitting element 0213 without particles can be equivalent to a diode structure and is not conductive; while the light-emitting element 0213 with particles will conduct abnormally. Then, the current will flow from the second power line VSS into the sensing line Sense through the second light-emitting channel, forming a circuit. If the current is large, some virtual short particles can be burned off, and the dark spot can return to normal. For some particles with good connectivity, so that the anode and cathode are connected, the current can be flexibly adjusted to burn them off in conjunction with the shielding circuit 0214. The burn-off point is generally located at the location of the shielding circuit 0214. In other words, the shielding circuit 0214 can melt itself when particles appear in the light-emitting element 0213, forming an open circuit, thereby automatically disconnecting the dark spot.

[0101] In summary, the embodiments of this disclosure provide a display panel. At least one pixel in the display panel includes multiple sub-pixel groups, and each sub-pixel group includes multiple sub-pixels of the same color. Each sub-pixel includes a driving circuit, a compensation circuit, a light-emitting element, and a shielding circuit. The driving circuit and compensation circuit can control the light-emitting element to emit light. The shielding circuit can be connected in series with any one of the multiple light-emitting channels of the light-emitting element to cut off the light-emitting channel when a dark spot appears in the light-emitting element. Thus, the problem of dark spot defects in the display panel can be reliably solved by using the above circuit in conjunction with timing settings. Furthermore, when a dark spot appears in a sub-pixel of a certain color within a pixel, other sub-pixels of the same color can be driven to emit light, ensuring a better display effect. The display panel provided by the embodiments of this disclosure has a high product yield.

[0102] Optional, Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of this disclosure. For example... Figure 4 As shown, each pixel 02 described in this embodiment may include four sub-pixel groups 02Z, and each sub-pixel group 02Z may include two sub-pixels 021 of the same color.

[0103] Furthermore, as described in the above embodiment, the colors of the sub-pixels 021 included in each of the four sub-pixel groups 02Z can be different. Accordingly, it can be understood that for... Figure 4 In the structure shown, each pixel 02 can include four sub-pixels 021 of different colors, with two sub-pixels 021 of each color. For example, the following embodiments use... Figure 4The structure shown is illustrated using an example where the four sub-pixel groups 02Z include two red sub-pixels 021R, two green sub-pixels 021G, two blue sub-pixels 021B, and two white sub-pixels 021W.

[0104] Optional, with Figure 4 In the structure shown, taking a subpixel group 02Z, which includes two red subpixels 021R, as an example, in... Figure 2 Based on the structure shown (i.e., the shielding circuit 0214 is connected in series in the first light-emitting channel where the first power line VDD is coupled to the light-emitting element 0213), Figure 5 A schematic diagram of another sub-pixel 021 structure is shown. And, in Figure 3 Based on the structure shown (i.e., the shielding circuit 0214 is connected in series in the second light-emitting channel where the sensing line Sense is coupled to the light-emitting element 0213), Figure 6 A schematic diagram of another sub-pixel 021 structure is shown. For example... Figure 5 and Figure 6 As shown, the driving circuit 021 may include: a data writing sub-circuit 02111, a driving sub-circuit 02112, and an adjustment sub-circuit 02113.

[0105] The data writing sub-circuit 02111 can be coupled to the first control line Gate1, the data line Data, and the second node G1, respectively. The data writing sub-circuit 02111 can be used to control the connection and disconnection of the data line Data and the second node G1 based on the first control signal provided by the first control line Gate1.

[0106] For example, the data writing sub-circuit 02111 can control the data line Data to conduct with the second node G1 when the potential of the first control signal provided by the first control line Gate1 is at the first potential. At this time, the data line Data can transmit data signals to the second node G1. Conversely, the data writing sub-circuit 02111 can control the data line Data to decouple from the second node G1 when the potential of the first control signal is at the second potential.

[0107] The driving sub-circuit 02112 can be coupled to the second node G1, the first power line VDD, and the first node S1, respectively. The driving sub-circuit 02112 can be used to control the switching of the first power line VDD and the first node S1 based on the potential of the second node G1, and to control the potential of the first node S1 based on the potential of the second node G1 and the first power signal.

[0108] For example, the driving sub-circuit 02112 can control the first power line VDD to conduct with the first node S1 when the potential of the second node G1 is the first potential. Then, the driving sub-circuit 02112 can generate a driving signal based on the potential of the second node G1 and the first power signal provided by the first power line VDD, and transmit it to the first node S1. Also, the driving sub-circuit 02112 can control the first power line VDD to disconnect from the first node S1 when the potential of the second node G1 is the first potential.

[0109] The regulating sub-circuit 02113 can be coupled to both the second node G1 and the first node S1. The regulating sub-circuit 02113 can be used to regulate the potential of one node (S1 or G1) based on the potential of the other node. For example, the regulating sub-circuit 02113 can regulate the potentials of both nodes through coupling.

[0110] The first light-emitting channel may further include a driving sub-circuit 02112. That is, the first light-emitting channel can be used to switch the first power line VDD coupled to the light-emitting element 0213 via the driving sub-circuit 02112. In other words, as an optional implementation: Figure 5 As shown, with the shielding circuit 0214 connected in series with the first light-emitting channel, the shielding circuit 0214 can actually be considered to be connected in series between the first power line VDD and the driving sub-circuit 02112 included in the driving circuit.

[0111] And for Figure 6 As shown in the structure, that is, as another optional implementation: based on the shielding circuit 0214 connected in series with the second light-emitting channel, as described in the above embodiment, the second light-emitting channel may also include a compensation circuit 0212, and the shielding circuit 024 may be connected in series between the light-emitting element 0213 and the compensation circuit 0212.

[0112] Optional, with Figure 5 Taking the structure shown as an example, Figure 7 A schematic diagram of a subpixel circuit structure is shown. Figure 6 Taking the structure shown as an example, Figure 8 A schematic diagram of a subpixel circuit structure is shown. (For example...) Figure 7 and Figure 8 As shown, the data writing sub-circuit 02111 may include: a data writing transistor T1. The driving sub-circuit 02112 may include: a driving transistor T3. The adjustment sub-circuit 02113 may include: a storage capacitor C1. The compensation circuit 0212 may include: a compensation transistor T2.

[0113] And, in Figure 5 Based on the structure shown, refer to Figure 7As can be seen, this is one possible implementation method:

[0114] The control electrode of the data writing transistor T1 can be coupled to the first control line Gate1, the first electrode of the data writing transistor T1 can be coupled to the data line Data, and the second electrode of the data writing transistor T1 can be coupled to the second node G1.

[0115] The control electrode of the driving transistor T3 can be coupled to the second node G1, the first electrode of the driving transistor T3 can be coupled to one end of the shielding circuit 024, the other end of the shielding circuit 024 can be coupled to the first power line VDD, and the second electrode of the driving transistor T3 can be coupled to the first node S1.

[0116] One end of the storage capacitor C1 can be coupled to the first node S1, and the other end of the storage capacitor C1 can be coupled to the second node G1.

[0117] The gate of the compensation transistor T2 can be coupled to the second control line Gate2, the first terminal of the compensation transistor T2 can be coupled to the sensing line Sense, and the second terminal of the compensation transistor T2 can be coupled to the first node S1.

[0118] exist Figure 6 Based on the structure shown, refer to Figure 8 As can be seen, another alternative implementation method is:

[0119] The control electrode of the data writing transistor T1 can be coupled to the first control line Gate1, the first electrode of the data writing transistor T1 can be coupled to the data line Data, and the second electrode of the data writing transistor T1 can be coupled to the second node G1.

[0120] The control electrode of the driving transistor T3 can be coupled to the second node G1, the first electrode of the driving transistor T3 can be coupled to the first power line VDD, and the second electrode of the driving transistor T3 can be coupled to the first node S1.

[0121] One end of the storage capacitor C1 can be coupled to the first node S1, and the other end of the storage capacitor C1 can be coupled to the second node G1.

[0122] The control electrode of the compensation transistor T2 can be coupled to the second control line Gate2, the first electrode of the compensation transistor T2 can be coupled to the sensing line Sense, the second electrode of the compensation transistor T2 can be coupled to one end of the shielding circuit 024, and the other end of the shielding circuit 024 can be coupled to the first node S1.

[0123] And, referring to the above Figure 7 and Figure 8As can be seen from the two circuit diagrams, the shielding circuit 0214 described in this embodiment may include a shielding resistor R1. Because it can automatically melt when a particle appears in the light-emitting element 0213, and is used to shield large currents, it can also be called a fusible resistor or a high-current shielding resistor.

[0124] Based on this, it can be known that for Figures 4 to 8 The structure shown in this embodiment can be considered as dividing the light-emitting channel of the light-emitting element 0213 in each sub-pixel 021 into two, and adding a shielding resistor R1 to each light-emitting channel. The shielding resistor R1 can melt and break when the current is constant, forming an open circuit, thereby disconnecting the dark spot, shielding the large current, avoiding the impact of the large current on the product reliability, and improving the product life.

[0125] Optionally, based on the above embodiments, the control electrode of a transistor can be the gate; the first electrode can be the drain; and the second electrode can be the source. Based on this, for Figure 7 The structure shown can be considered as a high-current shielding resistor connected in series between the first power line VDD and the drain of the driving transistor T3. For Figure 8 The structure shown can be considered as a high-current shielding resistor connected in series between the anode of the light-emitting element 0213 (i.e., the first node S1) and the source of the compensation transistor T2. Of course, in some other embodiments, the first terminal can refer to the source; the second terminal can refer to the drain.

[0126] Optional, Figure 7 and Figure 8 The structure shown can be considered a 6T2C2R circuit structure (i.e., including 6 transistors, 2 capacitors, and 2 resistors). Of course, in some other embodiments, each sub-pixel group 02Z can also be other circuit architectures besides those shown in the figure, such as 7T2C2R.

[0127] Optional, with Figure 4 The example shown includes a pixel 02 with four sub-pixel groups 02Z and eight sub-pixels 021, where the eight sub-pixels 021 are two red sub-pixels 021R, two green sub-pixels 021G, two blue sub-pixels 021B, and two white sub-pixels 021W. Figure 7 Based on the structure shown, Figure 9 A schematic diagram of the pixel structure in one of the above-mentioned alternative implementations is shown. Figure 8 Based on the structure shown, Figure 10 A schematic diagram of the pixel structure in another alternative implementation described above is shown.

[0128] refer to Figure 9 and Figure 10It can also be seen that all subpixels 021 of each color in each pixel 02 can be coupled to the same first control line Gate1, can be coupled to the same second control line Gate2, and can be coupled to the same first power line VDD. That is, Figure 4 The two red subpixels 021R, two green subpixels 021G, two blue subpixels 021B, and two white subpixels 021W shown can share the first control line Gate1, the second control line Gate2, and the first power line VDD. Of course, in some other embodiments, they can also share the same second power line VSS. Furthermore, subpixels 021 of the same color can be coupled to the same data line Data, and subpixels 021 of different colors can be coupled to different data lines Data, i.e. Figure 4 The two subpixels 021 in each subpixel group 02Z shown can share the same data line Data, while each subpixel group 02Z is ​​coupled to a different data line Data.

[0129] In addition, refer to Figure 9 and Figure 10 It can also be seen that the display panel may include an auxiliary electrode line Aux_on_array, which can be coupled to the cathode of the light-emitting element 0213 (not shown in the figure) to reduce voltage drop (IR drop).

[0130] Optional, combined Figure 4 In the embodiments of this disclosure, multiple pixels 02 in the display panel can be arranged in a row and column array. Furthermore, in conjunction with... Figure 9 and Figure 10 It can be seen that in the pixel column direction, multiple subpixels 021 in every two adjacent subpixel groups 02Z can be arranged alternately. In this way, good uniformity of light emission can be ensured.

[0131] It should be noted that, in order to distinguish the two sub-pixels 021 within a sub-pixel group 02Z, Figures 5 to 8In this diagram, the driving circuits 0211 included in the two sub-pixels 021 are designated as 0211_1 and 0211_2, the compensation circuits 0212 are designated as 0212_1 and 0212_2, the light-emitting elements 0213 are designated as 0213_1 and 0213_2, and the shielding circuits 0214 are designated as 0214_1 and 0214_2. The data writing sub-circuits 02111 in the driving circuits 0211 included in the two sub-pixels 021 are designated as 02111_1 and 02111_2, the driving sub-circuits 02112 are designated as 02112_1 and 02112_2, and the adjustment sub-circuits 02113 are designated as 02113_1 and 02113_2. The data writing transistors T1 in the two sub-pixels 021 are labeled T1_1 and T1_2, the compensation transistors T2 are labeled T2_1 and T2_2, the driving transistors T3 are labeled T3_1 and T3_2, the storage capacitors C1 are labeled C1_1 and C1_2, the shielding resistors R1 are labeled R1_1 and R1_2, the first node S1 is labeled S1_1 and S1_2, and the second node G1 is labeled G1_1 and G1_2. Furthermore, combined with... Figure 9 and Figure 10 As can be seen, to distinguish the different colored subpixels 021, the data writing transistor T1 in the red subpixel 021R is labeled r_T1, the compensation transistor T2 is labeled r_T2, the driving transistor T3 is labeled r_T3, the storage capacitor C1 is labeled r_C1, the shielding resistor R1 is labeled r_R1, the first node S1 is labeled r_S1, and the second node G1 is labeled r_G1, the light-emitting element 0213 is labeled r_0213, and the coupled data line Data is labeled Data_r. The labeling of each transistor, node, and coupled data line in the other subpixels 021B, 021G, and 021W is similar and will not be described in detail again.

[0132] Optional, Figure 11 This is a schematic diagram of the film structure of the shielding resistor R1 portion in a sub-pixel according to an embodiment of this disclosure. Figure 11 As shown, in the direction X1 parallel to the bearing surface of the substrate 01, at least one end of the shielding resistor R1 may include a rib structure, and the rib structure may include a groove recessed inward toward the side of the shielding resistor R1 along the direction Y1 perpendicular to the substrate 01.

[0133] Optional, continue to refer to Figure 11As can be seen, in the direction X1 parallel to the bearing surface of the substrate 01, the shielding resistor R1 may include a first structure R11 and a second structure R12. The distance between the side of the second structure R12 away from the substrate 01 and the substrate 01 can be greater than the distance between the side of the first structure R11 away from the substrate 01 and the substrate 01. That is, the thickness of the second structure R12 can be less than the thickness of the first structure R11.

[0134] Optional, continue to refer to Figure 11 As can be seen, the first structure R11 can be located on both sides of the second structure R12, and is used to connect the second structure R12 in series with either the first light-emitting channel or the second light-emitting channel described in the above embodiment. Correspondingly, the first structure R11 can also refer to one end and the other end of the shielding resistor R1, and the second structure R12 can also refer to the connecting line connecting the one end and the other end.

[0135] Optional, continue to refer to Figure 11 It can be seen that the first structure R11 may have the isolation structure described in the above embodiments, that is, the side of the first structure R11 away from the substrate 01 may have a groove that is recessed towards the shielding resistor R1 in a direction perpendicular to the substrate 01.

[0136] Optional, continue to refer to Figure 11 It can be seen that both sides of the first structure R11 may also include grooves that are recessed toward the center of the first structure R11.

[0137] For example, along the direction perpendicular to the substrate 01, the cross-section of the first structure R11 with the partition structure can be as follows: Figure 11 The I-shape shown. For the second structure R12, its cross-section can be... Figure 11 The trapezoid shown. Of course, in some other embodiments, the first structure R11 and the second structure R12 may also be of other shapes.

[0138] Optional, continue to refer to Figure 11 As can be seen, in the shielding resistor R1, the first structure R11 located on both sides of the second structure R12 can each include multiple first film layers stacked sequentially in a direction away from the substrate 01, and the second structure R12 can include multiple second film layers stacked sequentially in a direction away from the substrate 01. Furthermore, at least one of the multiple first film layers and multiple second film layers can be located on the same layer as the film layer included in the sub-pixel 021. Optionally, in this embodiment, the number of multiple second film layers can be less than the number of first film layers. Also, in both the multiple first film layers and multiple second film layers, the film layer furthest from the substrate 01 can be a transparent film layer. This ensures good light transmittance of the display panel and a relatively high resistance value for the shielding resistor R1.

[0139] Optional, continue to refer to Figure 11 As can be seen, sub-pixel 021 may include: a gate metal layer (Gate), a source / drain metal layer (SD1), a planarization layer (Resin), an anode layer (Anoede), a pixel defining layer (PDL), an electroluminescence layer (EL), and a cathode layer (Cathode) stacked sequentially along a direction away from the substrate 01. The materials of both the cathode layer (Anoede) and the anode layer (Cathode) can be transparent materials. For example, the transparent material of the cathode layer (Cathode) may include indium zinc oxide (IZO). The transparent material of the anode layer (Cathode) may include indium tin oxide (ITO).

[0140] And, for example, Figure 11 In the shielding resistor R1 shown, the first structure R11 may include five first film layers sequentially stacked along a direction away from the substrate O1. The materials of the first and third first film layers can both be the same as the material of the anode layer, which is the ITO material described in the above embodiments. Figure 11 The first and third first film layers are labeled 1ITO and 2ITO, respectively. The material of the second first film layer can be the same as that of the gate metal layer, such as aluminum alloy. The fourth first film layer can be located in the same layer as the light-emitting layer (EL), and the fifth first film layer can be located in the same layer as the cathode layer (Cathode). Accordingly, based on the cathode layer (Cathode) being made of IZO, the material of the fifth first film layer is also IZO. Figure 11 The first film layer of the fifth layer is labeled as IZO. That is, the film layer furthest from the substrate O1 in the shielding resistor R1 can be an IZO film layer, which can result in a larger resistance and reliably burn off the particles.

[0141] And, for example, Figure 11 In the shielding resistor R1 shown, the second structure R12 may include three second film layers stacked sequentially along the direction away from the substrate 01. The first second film layer may be located in the same layer as the planarization layer Resin, the second second film layer may be located in the same layer as the light-emitting layer EL, and the third first film layer may be located in the same layer as the cathode layer Cathode. As described in the above embodiment, it is also designated as IZO. Therefore, it can be seen that the film layer furthest from the substrate 01 in the shielding resistor R1 is the IZO film layer.

[0142] also, Figure 11The diagram also shows the active layer (Active) included in subpixel 021, and an insulating layer (not shown) that can be disposed between each pair of adjacent conductive layers (e.g., gate metal layer and source / drain metal layer SD1). Furthermore, the first structure R11 can be connected to the source / drain metal layer SD1 via a via, thereby achieving a connection to the transistor, and the second structure R12 can be connected in series with the light-emitting channel. The via can be a through-hole that penetrates the film layer located between the source / drain metal layer SD1 and the first structure R11. For example, based on the first light-emitting channel, refer to... Figure 7 The first structure R11 can be connected to the source / drain metal layer SD1 in the driving transistor T3 via an adapter hole. Based on the second light-emitting channel, refer to... Figure 8 The first structure R11 can be connected to the source-drain metal layer SD1 in the compensation transistor T2 through the adapter hole.

[0143] That is, in this embodiment of the disclosure, the two ends of the shielding resistor R1 (i.e., the first structure R11) can be formed using the Rib process. Combined with Figure 11 The principle of the process is explained as follows:

[0144] First, a patterning process can be used to form 1ITO on the side away from the substrate 01. Then, through a second deposition, an aluminum alloy film and an ITO film can be sequentially stacked along the direction away from 1ITO on the side of 1ITO away from the substrate 01. The aluminum alloy film and the ITO film are then processed through a second patterning process to form the third layer (first film) and 2ITO. The entire process requires no additional photomask or processing steps. The first patterning process includes photoresist coating, exposure, development, etching, and photoresist stripping.

[0145] Based on the above process, combined with Figure 11 It can be seen that an "I"-shaped Rib structure can be formed, serving as the two ends of the shielding resistor R1, causing 2ITO to protrude relative to the underlying film layer, exhibiting characteristics such as... Figure 11 The sharp corner shown cuts off the subsequently formed light-emitting layer EL, allowing the cathode layer IZO formed on the side of the light-emitting layer EL away from the substrate 01 to overlap with 1ITO. Based on this, when the shielding resistor R1 burns out, the reference... Figure 12 It can be seen that the burn-out location P1 can also occur on the second structure R12 (i.e., the connecting wire). Alternatively, refer to... Figure 13 It can be seen that the burn-out location P1 can occur at the first structure R11 (i.e., at both ends of the shielding resistor). For example, at the rib junction of the cathode layer IZO and IITO.

[0146] It should be noted that "being in the same layer" can refer to a layer structure formed by using the same film deposition process to create a film layer for a specific pattern, and then using the same photomask to pattern this film layer in a single patterning process. Depending on the specific pattern, the single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the resulting layer structure can be continuous or discontinuous. That is, multiple elements, components, structures, and / or parts located "in the same layer" are made of the same material and formed through the same single patterning process. This can save on manufacturing processes and costs, and can accelerate manufacturing efficiency.

[0147] In summary, the embodiments of this disclosure provide a display panel. At least one pixel in the display panel includes multiple sub-pixel groups, and each sub-pixel group includes multiple sub-pixels of the same color. Each sub-pixel further includes a driving circuit, a compensation circuit, a light-emitting element, and a shielding circuit. The driving circuit and compensation circuit can control the light-emitting element to emit light. The shielding circuit can be connected in series with any one of the multiple light-emitting channels of the light-emitting element to cut off the light-emitting channel when a dark spot appears in the light-emitting element. Thus, the problem of dark spot defects in the display panel can be reliably solved by using the above circuit in conjunction with timing settings. Furthermore, when a dark spot appears in a sub-pixel of a certain color within a pixel, other sub-pixels of the same color can be driven to emit light, ensuring a better display effect. The display panel provided by the embodiments of this disclosure has a high product yield.

[0148] As an optional implementation method, Figure 2 , Figure 5 , Figure 7 and Figure 9 The display panel shown, specifically the sub-pixel 021, includes a shielding circuit 0214 connected in series in the first light-emitting channel coupled to the first power line VDD and the light-emitting element 0213. Figure 14 A flowchart illustrating a control method for a display panel is shown. Figure 14 As shown, the method includes:

[0149] Step 1401: If it is determined that there are no dark spots on the display panel, a first power signal with a first potential is provided to the first power line, and a second power signal with a second potential is provided to the second power line.

[0150] That is, as described in the above embodiments, when there are no dark spots on the display panel, a positive voltage can be applied to the light-emitting element.

[0151] Step 1402: If it is determined that there is a dark spot defect on the display panel, then provide a first power signal with a second potential to the first power line and a second power signal with a first potential to the second power line.

[0152] That is, as described in the above embodiments, when there are no dark spot defects in the display panel, a reverse voltage can be applied to the light-emitting element.

[0153] Furthermore, upon determining that a dark spot defect has occurred on the display panel, a first control signal with a first potential is provided to the first control line, a second control signal with a second potential is provided to the second control line, and a data signal with a first potential is provided to the data line. Based on the first control signal and the data signal, the driving circuit controls the first power line to conduct with the first node, and the compensation circuit controls the sensing line to disconnect from the first node based on the second control signal. On this basis, light-emitting elements without particles can remain unconducted; while those with particles will conduct abnormally. Subsequently, current flows from the second power line to the first power line through the first light-emitting channel, forming a circuit. If the current is large, some short particles can be burned off, and the dark spot can be restored to normal. For particles with good connectivity, allowing the anode and cathode to be connected, the current can be flexibly adjusted in conjunction with a shielding circuit to burn them off; the burn-off point is generally located at the location of the shielding circuit. In other words, the shielding circuit can automatically melt and break when particles appear on the light-emitting element, thus automatically disconnecting the dark spot.

[0154] For example, with Figure 5 The structure shown uses N-type transistors, with the first potential being high (VGH) and the second potential being low (VGL). Figure 15 A timing diagram of the signal lines coupled to a subpixel is shown when a dark spot defect occurs on the display panel.

[0155] refer to Figure 13 It can be further seen that when a dark spot defect occurs on the display panel, on the one hand, a first control signal with a high potential VGH can be provided to the first control line Gate1, a second control signal with a low potential VGL can be provided to the second control line Gate2, and a data signal with a high potential VGH can be provided to the data line Data. Correspondingly, this allows the data writing transistor T1 (e.g., ...) included in each sub-pixel 021 of a pixel group 02Z to... Figure 5 Both T1_1 and T1_2 shown can be turned on, and the compensation transistor T2 (e.g., Figure 5 Both T2_1 and T2_2 shown are turned off. Therefore, the high-potential VGH data signal provided by the data line Data can be transmitted to the second node G1 (e.g., Figure 5 As shown in G1_1 and G1_2), this causes the driving transistor T3 (e.g., Figure 5 Both T3_1 and T3_2 shown are turned on. Furthermore, the first power line VDD and the first node S1 (e.g., Figure 5S1_1 and S1_2 shown can be turned on, while the sensing line Sense can be disconnected from the first node S1. Furthermore, on the other hand, a low-potential first power signal VGL can be provided to the first power line VDD, and a high-potential second power signal VGH can be provided to the second power line VSS; that is, the first power line VDD can be set low, and the second power line VSS can be set high. This low-potential first power signal VGL can be transmitted to the first node S1, thereby enabling power to the light-emitting element 0213 (e.g., ...). Figure 5 The purpose of applying a reverse voltage to 0213_1 and 0213_2 (shown) is to make the cathode potential of the light-emitting element 0213 greater than the anode potential.

[0156] Based on this, refer to Figure 16 and Figure 17 It can be seen that the particle-free light-emitting element 0213 can be equivalent to a diode structure and is not conductive; while the particle-containing light-emitting element 0213 will conduct, allowing current to flow from the second power line VSS through the driving transistor T3 to the first power line VDD, forming a path. This current flow direction can be found in [reference needed]. Figure 16 and Figure 17 The dashed arrow is shown. When the current is large, refer to... Figure 16 This can burn out some short, virtual particles, restoring dark spots to normal spots and resolving dark spot defects. Figure 16 The location of the burnout is indicated by resistor R0. For some stubborn particles, refer to... Figure 17 By increasing the current, the shielding resistor R1 can be burned out, creating an open circuit and thus automatically disconnecting the dark spot. Optionally, this can be combined with... Figure 12 It can be seen that the burnout point P1 of the shielding resistor R1 can be located on the connection line; or, combined with Figure 13 It can be seen that the burnout point P1 of the shielding resistor R1 can be located at the Rib overlap.

[0157] As another alternative implementation, Figure 3 , Figure 6 , Figure 8 and Figure 10 The display panel shown, specifically the sub-pixel 021, includes a shielding circuit 0214 connected in series in the second light-emitting channel where the sensing line Sense is coupled to the light-emitting element 0213. Figure 18 A flowchart illustrating a control method for a display panel is shown. Figure 18 As shown, the method includes:

[0158] Step 1801: If it is determined that there are no dark spots on the display panel, then provide a first power signal with a first potential to the first power line and a second power signal with a second potential to the second power line.

[0159] That is, as described in the above embodiments, when there are no dark spots on the display panel, a positive voltage can be applied to the light-emitting element.

[0160] Step 1802: If it is determined that there is a dark spot defect on the display panel, then provide a first power signal with a second potential to the first power line and a second power signal with a first potential to the second power line.

[0161] That is, as described in the above embodiments, when there are no dark spot defects in the display panel, a reverse voltage can be applied to the light-emitting element.

[0162] Furthermore, upon determining that a dark spot defect has occurred on the display panel, a sensing signal of the second potential is provided to the sensing line, a first control signal of the first and second potentials is sequentially provided to the first control line, a second control signal of the first potential is provided to the second control line, and a data signal of the second potential is provided to the data line. Based on the first control signal and the data signal, the driving circuit controls the first power line to disconnect from the first node, and the compensation circuit controls the sensing line to conduct to the first node based on the second control signal. On this basis, light-emitting elements without particles can remain unconducted; while light-emitting elements with particles will conduct abnormally. Subsequently, current flows from the second power line into the sensing line (Sense) through the second light-emitting channel, forming a circuit. If the current is large, some short particles can be burned off, and the dark spot can be restored to normal. For particles with good connectivity, allowing the anode and cathode to be connected, the current can be flexibly adjusted in conjunction with the shielding circuit to burn them off; the burn-off point is generally located at the location of the shielding circuit. In other words, the shielding circuit can automatically melt and break when particles appear on the light-emitting element, thus automatically disconnecting the dark spot.

[0163] For example, with Figure 6 The structure shown uses N-type transistors, with the first potential being high (VGH) and the second potential being low (VGL). Figure 19 A timing diagram of the signal lines coupled to a subpixel is shown when a dark spot defect occurs on the display panel.

[0164] refer to Figure 19 It can be further seen that when a dark spot defect occurs on the display panel, on the one hand, a first control signal with a high potential VGH and a low potential VGL can be sequentially provided to the first control line Gate1, a second control signal with a high potential VGH can be provided to the second control line Gate2, and a data signal with a low potential VGL can be provided to the data line Data. Correspondingly, this allows the data writing transistor T1 (e.g., ...) included in each sub-pixel 021 of a pixel group 02Z to... Figure 6The transistors T1_1 and T1_2 shown are first turned on and then turned off, and the compensation transistor T2 (e.g., Figure 6 Both T2_1 and T2_2 shown are turned on. Furthermore, the low-potential VGL data signal provided by the data line Data can be transmitted to the second node G1 (e.g., when the data write transistor T1 is turned on) Figure 6 As shown in G1_1 and G1_2), this causes the driving transistor T3 (e.g., Figure 6 Both T3_1 and T3_2 shown are turned off. Furthermore, the sensing line Sense and the first node S1 (e.g., Figure 6 S1_1 and S1_2 shown can be turned on, while the first power line VDD can be disconnected from the first node S1. Furthermore, on the other hand, a second power signal with a high potential VGH can be provided to the second power line VSS, and a sensing signal with a low potential VGL can be provided to the sensing line Sense. That is, the first power line VDD can be set low, and the sensing line Sense can be set high. Based on this embodiment, a first power signal with a low potential VGL can be provided to the first power line VDD, i.e., the first power line VDD is set low. Correspondingly, the sensing signal with the low potential VGL can be transmitted to the first node S1, thereby realizing the connection of the light-emitting element 0213 (e.g., ...). Figure 6 The purpose of applying a reverse voltage to 0213_1 and 0213_2 (shown) is to make the cathode potential of the light-emitting element 0213 greater than the anode potential.

[0165] Based on this, refer to Figure 20 and Figure 21 It can be seen that the particle-free light-emitting element 0213 can be equivalent to a diode structure and is not conductive; while the particle-containing light-emitting element 0213 will conduct, allowing current to flow from the second power line VSS through the compensation transistor T2 to the sensing line Sense, forming a path. The direction of this current flow can be found in [reference needed]. Figure 20 and Figure 21 The dashed arrow is shown. When the current is large, refer to... Figure 20 This can burn out some short, virtual particles, restoring dark spots to normal spots and resolving dark spot defects. Figure 16 The location of the burnout is indicated by resistor R0. For some stubborn particles, refer to... Figure 21 By increasing the current, the shielding resistor R1 can be burned out, creating an open circuit and thus automatically disconnecting the dark spot. Optionally, this can be combined with... Figure 12 It can be seen that the burnout point P1 of the shielding resistor R1 can be located on the connection line; or, combined with Figure 13 It can be seen that the burnout point P1 of the shielding resistor R1 can be located at the Rib overlap.

[0166] In summary, this disclosure provides a control method for a display panel. At least one pixel in the display panel includes multiple sub-pixel groups, and each sub-pixel group includes multiple sub-pixels of the same color. Each sub-pixel further includes a driving circuit, a compensation circuit, a light-emitting element, and a shielding circuit. In this method, when a dark spot defect occurs in the display panel, a reverse voltage can be applied to the light-emitting element by matching the signal timing to cut off the dark spot, thereby reliably solving the dark spot defect problem. Furthermore, when a dark spot occurs in a sub-pixel of a certain color within a pixel, other sub-pixels of the same color can be driven to emit light, ensuring a better display effect. This results in a higher product yield for the display panel.

[0167] Figure 22 This is a schematic diagram of the structure of a display device provided in an embodiment of this disclosure. Figure 22 As shown, the display device may include: a power supply component J1, and a display panel 00 as described in the above embodiments.

[0168] The power supply component J1 is connected to the display panel 00 and is used to supply power to the display panel 00.

[0169] Optionally, the display device described in the embodiments of this disclosure can be any product or component with display function, such as an OLED transparent display device, a mobile phone, a tablet computer, a flexible display device, a television, and a monitor.

[0170] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0171] Furthermore, the terminology used in the embodiments of this disclosure is for the purpose of explaining the embodiments of this disclosure only and is not intended to limit this disclosure. Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should be understood in their ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains.

[0172] For example, in embodiments of this disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0173] Similarly, words like "one" or "one" do not indicate a quantity limit, but rather that there is at least one.

[0174] The word “includes” or similar terms means that the elements or objects preceding “includes” or “include” cover the elements or objects listed after “includes” or “include” or their equivalents, and do not exclude other elements or objects.

[0175] "Up," "down," "left," or "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0176] The "and / or" signifies that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0177] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A display panel, characterized in that, The display panel includes: Substrate, and multiple pixels located on the substrate; Wherein, at least one of the pixels comprises a plurality of sub-pixel groups, and at least one of the sub-pixel groups comprises a plurality of sub-pixels of the same color, each of the sub-pixels comprising: The driving circuit is coupled to the first control line, the data line, the first power line and the first node respectively, and is used to control the on / off state of the first power line and the first node based on the first control signal provided by the first control line and the data signal provided by the data line, and to control the potential of the first node based on the data signal and the first power signal provided by the first power line. The compensation circuit is coupled to the second control line, the sensing line and the first node respectively, and is used to control the connection and disconnection of the sensing line and the first node based on the second control signal provided by the second control line; The light-emitting element is coupled to the first node and the second power line respectively, and is used to emit light based on the potential of the first node and the second power signal provided by the second power line; And a shielding circuit, connected in series with any light-emitting channel, is used to cut off the light-emitting channel when the light-emitting element has a dark spot. The light-emitting channel includes a first light-emitting channel and a second light-emitting channel. The first light-emitting channel includes a channel where the first power line is coupled to the light-emitting element, and the second light-emitting channel includes a channel where the sensing line is coupled to the light-emitting element. If the shielding circuit is connected in series with the first light-emitting channel, when it is determined that the display panel does not have a dark spot defect, the first power line is used to receive a first power signal at a first potential, and the second power line is used to receive a second power signal at a second potential; when it is determined that the display panel has a dark spot defect, the first power line is used to receive a first power signal at a second potential, the second power line is used to receive a second power signal at a first potential, the first control line is used to receive a first control signal at a first potential, the second control line is used to receive a second control signal at a second potential, the data line is used to receive a data signal at a first potential, the driving circuit is used to control the first power line to conduct with the first node based on the first control signal and the data signal, and the compensation circuit is used to control the sensing line to disconnect from the first node based on the second control signal.

2. The display panel according to claim 1, characterized in that, The driving circuit includes: The data writing sub-circuit is coupled to the first control line, the data line and the second node respectively, and is used to control the connection and disconnection of the data line and the second node based on the first control signal provided by the first control line; A driving sub-circuit is coupled to the second node, the first power line and the first node respectively, and is used to control the on / off state of the first power line and the first node based on the potential of the second node, and to control the potential of the first node based on the potential of the second node and the first power signal. The regulating sub-circuit is coupled to the second node and the first node respectively, and is used to regulate the potential of the other node based on the potential of one of the first node and the second node; The first light-emitting channel also includes the driving sub-circuit.

3. The display panel according to claim 2, characterized in that, The shielding circuit is connected in series between the first power line and the driving sub-circuit.

4. The display panel according to claim 3, characterized in that, The data writing sub-circuit includes a data writing transistor; the driving sub-circuit includes a driving transistor; the adjustment sub-circuit includes a storage capacitor; and the compensation circuit includes a compensation transistor. The control electrode of the data writing transistor is coupled to the first control line, the first electrode of the data writing transistor is coupled to the data line, and the second electrode of the data writing transistor is coupled to the second node. The control electrode of the driving transistor is coupled to the second node, the first electrode of the driving transistor is coupled to one end of the shielding circuit, the other end of the shielding circuit is coupled to the first power line, and the second electrode of the driving transistor is coupled to the first node. One end of the storage capacitor is coupled to the first node, and the other end of the storage capacitor is coupled to the second node; The gate of the compensation transistor is coupled to the second control line, the first electrode of the compensation transistor is coupled to the sensing line, and the second electrode of the compensation transistor is coupled to the first node.

5. The display panel according to claim 2, characterized in that, The second light-emitting channel also includes the compensation circuit, and the shielding circuit is connected in series between the light-emitting element and the compensation circuit.

6. The display panel according to claim 5, characterized in that, The data writing sub-circuit includes a data writing transistor; the driving sub-circuit includes a driving transistor; the adjustment sub-circuit includes a storage capacitor; and the compensation circuit includes a compensation transistor. The control electrode of the data writing transistor is coupled to the first control line, the first electrode of the data writing transistor is coupled to the data line, and the second electrode of the data writing transistor is coupled to the second node. The control electrode of the driving transistor is coupled to the second node, the first electrode of the driving transistor is coupled to the first power line, and the second electrode of the driving transistor is coupled to the first node. One end of the storage capacitor is coupled to the first node, and the other end of the storage capacitor is coupled to the second node; The control electrode of the compensation transistor is coupled to the second control line, the first electrode of the compensation transistor is coupled to the sensing line, the second electrode of the compensation transistor is coupled to one end of the shielding circuit, and the other end of the shielding circuit is coupled to the first node.

7. The display panel according to any one of claims 1 to 6, characterized in that, The shielding circuit includes a shielding resistor.

8. The display panel according to claim 7, characterized in that, In a direction parallel to the bearing surface of the substrate, at least one end of the shielding resistor includes a partition structure, the partition structure including a groove recessed toward one side of the shielding resistor in a direction perpendicular to the substrate.

9. The display panel according to claim 8, characterized in that, In a direction parallel to the bearing surface of the substrate, the shielding resistor includes: a first structure and a second structure; Wherein, the distance between the side of the second structure away from the substrate and the substrate is greater than the distance between the side of the first structure away from the substrate and the substrate.

10. The display panel according to claim 9, characterized in that, The first structure is located on both sides of the second structure and is used to connect the second structure in series with any light-emitting channel; The first structure includes the partition structure, and in a direction parallel to the bearing surface of the substrate, both sides of the first structure include grooves that are recessed toward the center of the first structure.

11. The display panel according to claim 9, characterized in that, The first structure includes: multiple first film layers stacked sequentially in a direction away from the substrate; the second structure includes multiple second film layers stacked sequentially in a direction away from the substrate; and at least one of the multiple first film layers and the multiple second film layers is located in the same layer as the film layer included in the sub-pixel.

12. The display panel according to claim 11, characterized in that, The sub-pixel includes: a gate metal layer, a source / drain metal layer, a planarization layer, an anode layer, a pixel definition layer, a light-emitting layer, and a cathode layer, which are stacked sequentially along a direction away from the substrate. The cathode layer and the anode layer are both made of transparent materials. The first structure includes five first film layers, wherein the materials of the first and third first film layers are the same as the material of the anode layer, the material of the second first film layer is the same as the material of the gate metal layer, the fourth first film layer is located in the same layer as the light-emitting layer, and the fifth first film layer is located in the same layer as the cathode layer, and the first structure overlaps with the source and drain metal layers through a transition hole; The second structure includes three second film layers, wherein the first second film layer is located in the same layer as the planarization layer, the second second film layer is located in the same layer as the light-emitting layer, and the third first film layer is located in the same layer as the cathode layer.

13. The display panel according to any one of claims 1 to 6, characterized in that, The plurality of pixel arrays are arranged in a manner such that, in the direction of pixel columns, the plurality of subpixels in each pair of adjacent subpixel groups are arranged alternately.

14. A method for controlling a display panel, characterized in that, The method is applied to a display panel as described in any one of claims 1 to 13, wherein the shielding circuit of the sub-pixel is connected in series in a second light-emitting channel coupled to the sensing line and the light-emitting element; the method includes: If it is determined that the display panel does not have any dark spot defects, a first power signal with a first potential is provided to the first power line, and a second power signal with a second potential is provided to the second power line. If it is determined that the display panel has a dark spot defect, a first power signal with a second potential is provided to the first power line, and a second power signal with a first potential is provided to the second power line. Furthermore, when it is determined that the display panel has a dark spot defect, a sensing signal with a second potential is provided to the sensing line, a first control signal with a first potential and a second potential is sequentially provided to the first control line, a second control signal with a first potential is provided to the second control line, and a data signal with a second potential is provided to the data line. Based on the first control signal and the data signal, the driving circuit controls the first power line to disconnect from the first node, and the compensation circuit controls the sensing line to conduct to the first node based on the second control signal.

15. A display device, characterized in that, The display device includes: a power supply component, and a display panel as described in any one of claims 1 to 13; The power supply component is coupled to the display panel and is used to supply power to the display panel.

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