Pixel circuit and display module

Abstract

The embodiment of the invention provides a pixel circuit and a display module, and relates to the field of display panels. The pixel circuit comprises a driving module which is electrically connected with a first electrode of a light-emitting element and is used for driving the light-emitting element to emit light; the first end of the shunt branch is electrically connected with the first electrode of the light-emitting element, the second end of the shunt branch is electrically connected with a first reference voltage signal line, and the shunt branch is used for transmitting part of driving current provided by the driving module to the first reference voltage signal line. According to the pixel circuit and the display module provided by the embodiment of the invention, the problem that the display brightness of a display panel is not uniform can be fully improved, so that the display effect and the use performance of the display panel are effectively improved.

Description

Technical Field

[0001] The present application belongs to the technical field of display panels, and in particular, relates to a pixel circuit and a display module. Background Art

[0002] With the rapid development of display technology, full-screen display has become the development trend of mobile display devices such as mobile phones. Organic Light Emitting Display (OLED) and flat display devices based on technologies such as light emitting diodes (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages of high image quality, power saving, thin body and wide application range, becoming the mainstream of display devices. However, the performance of current OLED display products needs to be improved. Summary of the invention

[0003] The embodiments of the present application provide a pixel circuit and a display module, which can fully improve the problem of uneven display brightness of a display panel, thereby effectively improving the display effect and performance of the display panel.

[0004] In a first aspect, an embodiment of the present application provides a pixel circuit, the pixel circuit comprising:

[0005] A driving module, the driving module is electrically connected to the first electrode of the light emitting element, and the driving module is used to drive the light emitting element to emit light;

[0006] A shunt branch, a first end of the shunt branch is electrically connected to the first electrode of the light-emitting element, a second end of the shunt branch is electrically connected to the first reference voltage signal line, and the shunt branch is used to transmit part of the driving current provided by the driving module to the first reference voltage signal line.

[0007] According to an implementation of the first aspect of the present application, the first reference voltage signal transmitted by the first reference voltage signal line is a voltage signal with a variable voltage value.

[0008] According to the implementation scheme of the first aspect of the present application, the shunt branch includes a shunt switch module, a control end of the shunt switch module is electrically connected to the target control signal line, a first end of the shunt switch module is electrically connected to the first electrode of the light-emitting element, and a second end of the shunt switch module is electrically connected to the first reference voltage signal line. The shunt switch module is used to turn on or off under the control of the target control signal line.

[0009] According to an implementation of the first aspect of the present application, the pixel circuit also includes a first reset module, a control end of the first reset module is electrically connected to the first scanning signal line, a first end of the first reset module is electrically connected to the first electrode of the light-emitting element, and a second end of the first reset module is electrically connected to the second reference voltage signal line. The first reset module is used to be turned on under the control of the first scanning signal line, transmit the second reference voltage signal on the second reference voltage signal line to the first electrode of the light-emitting element, and reset the first electrode of the light-emitting element.

[0010] According to the implementation of the first aspect of the present application, the shunt switch module is turned on during the light-emitting phase of the light-emitting element, the first reset module is turned on during the first reset phase, and the first reset phase does not overlap with the light-emitting phase in time.

[0011] According to an implementation of the first aspect of the present application, the second electrode of the light-emitting element is electrically connected to the first power supply voltage signal line, and the first reference voltage signal line and the first power supply voltage signal line are different signal lines.

[0012] According to an implementation of the first aspect of the present application, when the brightness of the light-emitting element connected to the pixel circuit is less than or equal to a first preset brightness threshold, the shunt switch module is turned on under the control of the target control signal line.

[0013] According to an implementation of the first aspect of the present application, when the brightness of the light-emitting element connected to the pixel circuit is a first brightness, the first reference voltage signal line transmits a first reference voltage signal of a first voltage value; when the brightness of the light-emitting element connected to the pixel circuit is a second brightness, the first reference voltage signal line transmits a first reference voltage signal of a second voltage value; the first brightness and the second brightness are both less than or equal to a first preset brightness threshold, the first brightness is different from the second brightness, and the first voltage value is different from the second voltage value.

[0014] According to an implementation of the first aspect of the present application, the first brightness is smaller than the second brightness, and the first voltage value is smaller than the second voltage value.

[0015] According to an implementation manner of the first aspect of the present application, the brightness of the light-emitting element connected to the pixel circuit is less than or equal to the first preset brightness threshold, including: the brightness level of the display panel where the pixel circuit is located is less than or equal to the first brightness level threshold, and / or, the grayscale of the light-emitting element connected to the pixel circuit is less than or equal to the first grayscale threshold, and / or, the average grayscale of multiple sub-pixels of the display panel where the pixel circuit is located in a frame display image is less than or equal to the second grayscale threshold, and / or, the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in a frame display image of the display panel where the pixel circuit is located is greater than the first number threshold, and / or, the number of sub-pixels whose grayscale is greater than the first grayscale threshold in a frame display image of the display panel where the pixel circuit is located is less than or equal to the second number threshold.

[0016] According to an implementation of the first aspect of the present application, when the brightness of the light-emitting element connected to the pixel circuit is greater than a first preset brightness threshold, the first reference voltage signal line does not transmit the first reference voltage signal, and / or the shunt switch module is turned off under the control of the target control signal line.

[0017] According to an implementation manner of the first aspect of the present application, the brightness of the light-emitting element connected to the pixel circuit is greater than the first preset brightness threshold value, including: the brightness level of the display panel where the pixel circuit is located is greater than the first brightness level threshold value, and / or, the grayscale of the light-emitting element connected to the pixel circuit is greater than the first grayscale threshold value, and / or, the average grayscale of multiple sub-pixels of the display panel where the pixel circuit is located in a frame display image is greater than the second grayscale threshold value, and / or, the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in a frame display image of the display panel where the pixel circuit is located is less than or equal to the first number threshold value, and / or, the number of sub-pixels whose grayscale is greater than the first grayscale threshold in a frame display image of the display panel where the pixel circuit is located is greater than the second number threshold value.

[0018] According to an implementation scheme of the first aspect of the present application, the shunt branch also includes a voltage divider module, which is electrically connected between the first end of the shunt switch module and the first electrode of the light-emitting element, and / or the voltage divider module is electrically connected between the second end of the shunt switch module and the first reference voltage signal line.

[0019] According to an implementation of the first aspect of the present application, the voltage divider module includes a resistor.

[0020] According to an implementation of the first aspect of the present application, the impedance of the voltage divider module is less than or equal to the impedance of the light emitting element.

[0021] According to an implementation of the first aspect of the present application, the first reference voltage signal line is electrically connected to the first reference voltage signal output terminal of the power module.

[0022] According to an implementation of the first aspect of the present application, the shunt branches of at least two pixel circuits are electrically connected to the first reference voltage signal output terminal through the same first reference voltage signal line.

[0023] According to an implementation scheme of the first aspect of the present application, the control end of the driving module is electrically connected to the first node, the first end of the driving module is electrically connected to the second node, and the second end of the driving module is electrically connected to the third node; the pixel circuit also includes a first light-emitting control module and / or a second light-emitting control module, wherein: the control end of the first light-emitting control module is electrically connected to the light-emitting control signal line, the first end of the first light-emitting control module is electrically connected to the second power supply voltage signal line, and the second end of the first light-emitting control module is electrically connected to the second node; the control end of the second light-emitting control module is electrically connected to the light-emitting control signal line, the first end of the second light-emitting control module is electrically connected to the third node, and the second end of the second light-emitting control module is electrically connected to the first electrode of the light-emitting element.

[0024] According to an implementation of the first aspect of the present application, the target control signal line multiplexes the light-emitting control signal line, or the target control signal line and the light-emitting control signal line are two different signal lines.

[0025] According to an implementation of the first aspect of the present application, the target control signal line is electrically connected to the control end of the shunt switch module of at least two rows of pixel circuits, and each row of pixel circuits includes a plurality of pixel circuits arranged along the row direction.

[0026] According to an implementation of the first aspect of the present application, the pixel circuit also includes: a data writing module, wherein the control end of the data writing module is electrically connected to the second scanning signal line, the first end of the data writing module is electrically connected to the data signal line, and the second end of the data writing module is electrically connected to the second node; a threshold compensation module, wherein the control end of the threshold compensation module is electrically connected to the third scanning signal line, the first end of the threshold compensation module is electrically connected to the first node, and the second end of the threshold compensation module is electrically connected to the third node; a second reset module, wherein the control end of the second reset module is electrically connected to the fourth scanning signal line, the first end of the second reset module is electrically connected to the first node, and the second end of the second reset module is electrically connected to the third reference voltage signal line, and the second reset module is used to be turned on under the control of the fourth scanning signal line, transmit the third reference voltage signal of the third reference voltage signal line to the first node, and reset the first node; a storage module, wherein the first end of the storage module is electrically connected to the second power supply voltage signal line, and the second end of the storage module is electrically connected to the first node.

[0027] According to an implementation of the first aspect of the present application, the pixel circuit also includes: a bias adjustment module, a control end of the bias adjustment module is electrically connected to the fifth scanning signal line, a first end of the bias adjustment module is electrically connected to the bias voltage signal line, and a second end of the bias adjustment module is electrically connected to the second node or the third node.

[0028] In a second aspect, an embodiment of the present application provides a display module, which includes a display module including a display panel, and the display panel includes a pixel circuit provided in any of the aforementioned embodiments of the first aspect of the present application.

[0029] According to the implementation scheme of the second aspect of the present application, the display panel includes a display area and a non-display area, the display area includes a plurality of sub-pixels arranged in an array, the sub-pixels include a pixel circuit and a light-emitting element; the first reference voltage signal line includes a secondary line located in the display area and a main line located in the non-display area, the secondary line is electrically connected to the plurality of pixel circuits, and the secondary line receives the first reference voltage signal through the main line.

[0030] According to an implementation of the second aspect of the present application, the secondary line includes a plurality of first routing portions extending along a first direction, a first routing portion being electrically connected to a plurality of pixel circuits arranged along the first direction, and the main line includes a first main line extending along a second direction, the first direction intersects the second direction, and the first routing portion is electrically connected to the first main line.

[0031] According to an implementation of the second aspect of the present application, the secondary line also includes a plurality of second routing portions extending along the second direction, any two adjacent second routing portions are separated by a pixel circuit, and the second routing portions are electrically connected to the plurality of first routing portions.

[0032] According to an implementation of the second aspect of the present application, the main line further includes a second main line extending along the first direction, and the first main line and the plurality of second routing portions are electrically connected to the second main line.

[0033] According to an implementation of the second aspect of the present application, the display module further includes a power module, and a first reference voltage signal output terminal of the power module is electrically connected to the main line.

[0034] According to an implementation of the second aspect of the present application, the power module includes a display driver chip or a power chip.

[0035] According to an implementation of the second aspect of the present application, the display panel includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are located in a display area of ​​the display panel, the sub-line includes a first sub-sub-line, a second sub-sub-line, and a third sub-sub-line, the main line includes a first sub-main line, a second sub-main line, and a third sub-main line, the first reference voltage signal includes a first sub-reference voltage signal, a second sub-reference voltage signal, and a third sub-reference voltage signal; the first sub-sub-line is electrically connected to a pixel circuit of a plurality of first color sub-pixels in the display area, and the first sub-sub-line receives the first sub-reference voltage signal through the first sub-main line;

[0036] The second sub-sub-line is electrically connected to the pixel circuits of multiple second color sub-pixels in the display area, and the second sub-sub-line receives the second sub-reference voltage signal through the second sub-main line; the third sub-sub-line is electrically connected to the pixel circuits of multiple third color sub-pixels in the display area, and the third sub-sub-line receives the third sub-reference voltage signal through the third sub-main line.

[0037] According to an implementation of the second aspect of the present application, the first color sub-pixel includes a red sub-pixel, the second color sub-pixel includes a green sub-pixel, and the third color sub-pixel includes a blue sub-pixel.

[0038] According to an implementation of the second aspect of the present application, the display module also includes a power supply module, and the first reference voltage signal output terminal of the power supply module includes a first sub-reference voltage signal output terminal, a second sub-reference voltage signal output terminal and a third sub-reference voltage signal output terminal, the first sub-reference voltage signal output terminal is electrically connected to the first sub-main line, the second sub-reference voltage signal output terminal is electrically connected to the second sub-main line, and the third sub-reference voltage signal output terminal is electrically connected to the third sub-main line.

[0039] According to an implementation of the second aspect of the present application, the display panel includes a display area and a non-display area, the display area includes M partitions, one partition includes at least one sub-pixel, the sub-pixel includes a pixel circuit and a light-emitting element, and M is an integer greater than 1; the display module includes M first reference voltage signal lines, one first reference voltage signal line corresponds to one partition, and one first reference voltage signal line is electrically connected to the pixel circuit in the corresponding partition; the voltage values ​​of the first reference voltage signals received by the M first reference voltage signal lines are the same or different.

[0040] According to an implementation of the second aspect of the present application, the display module also includes a power module, which includes at least M first reference voltage signal output terminals, and the M first reference voltage signal output terminals are electrically connected to the M first reference voltage signal lines in a one-to-one correspondence.

[0041] According to an implementation of the second aspect of the present application, the display panel includes a display area and a non-display area, the display panel includes a plurality of sub-pixels arranged in an array, the plurality of sub-pixels arranged in an array are located in the display area, and the sub-pixels include a pixel circuit and a light-emitting element; when the target brightness of the display panel is less than or equal to a first preset brightness threshold, the first reference voltage signal line transmits a first reference voltage signal.

[0042] According to an implementation of the second aspect of the present application, the shunt branch includes a shunt switch module, a control end of the shunt switch module is electrically connected to a target control signal line, a first end of the shunt switch module is electrically connected to a first electrode of a light-emitting element, and a second end of the shunt switch module is electrically connected to a first reference voltage signal line.

[0043] According to an implementation of the second aspect of the present application, when the target brightness of the display panel is less than or equal to a first preset brightness threshold, the target control signal line transmits an enable level.

[0044] According to an implementation of the second aspect of the present application, when the target brightness of the display panel is greater than a first preset brightness threshold, the target control signal line transmits a non-enable level.

[0045] According to an implementation manner of the second aspect of the present application, the target brightness of the display panel is less than or equal to the first preset brightness threshold value, including: the brightness level of the display panel is less than or equal to the first brightness level threshold value, and / or, the average value of the grayscales of multiple sub-pixels of the display panel in a frame of displayed image is less than or equal to the second grayscale threshold value, and / or, the number of sub-pixels of the display panel in a frame of displayed image whose grayscale is less than or equal to the first grayscale threshold value is greater than the first number threshold value, and / or, the number of sub-pixels of the display panel in a frame of displayed image whose grayscale is greater than the first grayscale threshold value is less than or equal to the second number threshold value.

[0046] According to an implementation of the second aspect of the present application, when the target brightness of the display panel is a first target brightness, the first reference voltage signal line transmits a first reference voltage signal of a first target voltage value; when the target brightness of the display panel is a second target brightness, the first reference voltage signal line transmits a first reference voltage signal of a second target voltage value; the first target brightness and the second target brightness are both less than or equal to a first preset brightness threshold, the first target brightness is different from the second target brightness, and the first target voltage value is different from the second target voltage value.

[0047] According to an implementation of the second aspect of the present application, the first target brightness is smaller than the second target brightness, and the first target voltage value is smaller than the second target voltage value.

[0048] According to an implementation of the second aspect of the present application, when the target brightness of the display panel is greater than a first preset brightness threshold, the first reference voltage signal is not transmitted, and / or the shunt switch module is turned off under the control of the target control signal line.

[0049] According to an implementation of the second aspect of the present application, the target brightness of the display panel includes an average brightness of multiple sub-pixels in the display panel.

[0050] According to an implementation manner of the second aspect of the present application, the target brightness of the display panel is greater than the first preset brightness threshold including: the brightness level of the display panel is greater than the first brightness level threshold, and / or the average value of the grayscales of multiple sub-pixels of the display panel in a frame of displayed image is greater than the second grayscale threshold, and / or the number of sub-pixels of the display panel in a frame of displayed image whose grayscale is less than or equal to the first grayscale threshold is less than or equal to the first number threshold, and / or the number of sub-pixels of the display panel in a frame of displayed image whose grayscale is greater than the first grayscale threshold is greater than the second number threshold.

[0051] It can be seen from the above description that the pixel circuit and display module provided by the embodiment of the present application include a driving module and a shunt branch. The driving module is electrically connected to the first electrode of the light-emitting element and can be used to drive the light-emitting element to emit light. The first end of the above-mentioned shunt branch is electrically connected to the first electrode of the light-emitting element, and the second end thereof is electrically connected to the first reference voltage signal line, which can be used to transmit part of the driving current provided by the driving module to the first reference voltage signal line. Compared with the prior art, the pixel circuit and display module provided by the embodiment of the present application shunt the driving current provided by the driving module through the shunt branch, which is conducive to making the current flowing through the driving module larger, that is, it is equivalent to indirectly raising the total current flowing through the driving module by shunt, and improving the "grayscale brightness" of the pixel circuit in disguise. In this way, after the grayscale brightness is raised due to shunt, the influence of the characteristic fluctuation of the electronic device inside the pixel circuit on the current becomes relatively small, so that the brightness of the light-emitting element driven by the pixel circuit reaches the expected brightness, thereby improving the brightness uniformity and picture quality under low grayscale and low brightness, and thus helping to improve the problem of uneven display of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0053] Figure 1 is a structural schematic diagram of a pixel circuit provided in an embodiment of the present application;

[0054] Figure 2 is a structural schematic diagram of another pixel circuit provided in an embodiment of the present application;

[0055] Figure 3 is a structural schematic diagram of another pixel circuit provided in an embodiment of the present application;

[0056] Figure 4 This is a schematic diagram of a structure between a first reference voltage signal line and a power module provided in an embodiment of the present application;

[0057] Figure 5 is a structural schematic diagram of another pixel circuit provided in an embodiment of the present application;

[0058] Figure 6 is a structural schematic diagram of another pixel circuit provided in an embodiment of the present application;

[0059] Figure 7 is a timing diagram of a pixel circuit provided in an embodiment of the present application;

[0060] Figure 8is a structural schematic diagram of another pixel circuit provided in an embodiment of the present application;

[0061] Fig. 9 is a structural schematic diagram of a display module provided in an embodiment of the present application;

[0062] Fig.10 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0063] Fig.11 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0064] Fig.12 is a structural schematic diagram of another display panel provided in an embodiment of the present application;

[0065] Fig.13 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0068] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0069] It should be noted that the transistor in the embodiment of the present application can be an N-type transistor or a P-type transistor. For an N-type transistor, the on-level is a high level and the off-level is a low level. That is, when the gate of the N-type transistor is at a high level, the first and second poles thereof are connected, and when the gate of the N-type transistor is at a low level, the first and second poles thereof are disconnected. For a P-type transistor, the on-level is a low level and the off-level is a high level. That is, when the control pole of the P-type transistor is at a low level, the first and second poles thereof are connected, and when the control terminal of the P-type transistor is at a high level, the first and second poles thereof are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors is used as its control pole, and, according to the signal of the gate of each transistor and its type, the first pole thereof can be used as the source and the second pole as the drain, or the first pole thereof can be used as the drain and the second pole as the source, and no distinction is made here. In addition, the on-level and the off-level in the embodiment of the present invention are both general terms, and the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / turn off the transistor.

[0070] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0071] In the embodiment of the present application, the first node, the second node and the third node are only defined for the convenience of describing the circuit structure, and the first node, the second node and the third node are not actual circuit units.

[0072] 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.

[0073] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0074] As mentioned above, with the continuous development of display technology, the application scope of OLED display products is becoming more and more extensive, and people's requirements for them are becoming higher and higher, but the performance of current OLED display products needs to be improved. Specifically, the inventors of this application have found that when the light-emitting device displays low grayscale (low brightness), there is a phenomenon of poor display.

[0075] The inventor of the present application has further studied and found that, due to the continuous iteration and update of the material system of OLED devices, the luminous efficiency of the devices is getting higher and higher, and the pixel circuit driving current at the same grayscale brightness is getting smaller and smaller. In this way, the influence of transistor characteristic fluctuations (such as electrical fluctuations, size fluctuations or film thickness fluctuations, etc.) in the pixel circuit on low brightness and low grayscale will become greater, thereby causing the display quality to deteriorate at low brightness and low grayscale. Based on this, how to better improve the display quality at low brightness and low grayscale is one of the problems that need to be solved urgently in the current current-controlled pixel driving circuit.

[0076] In order to solve the above technical problems, the embodiments of the present application provide a pixel circuit and a display module. It should be noted that the embodiments provided in the present application are not intended to limit the scope of the present application.

[0077] The following first introduces the pixel circuit provided by the embodiment of the present application. Figure 1 , Figure 1 is a schematic diagram of a pixel circuit provided in an embodiment of the present application. Figure 1 As shown, the pixel circuit 10 includes a driving module 101 and a shunt branch 11 .

[0078] Specifically, the driving module 101 is electrically connected to the first electrode of the light emitting element D, and the driving module 101 is used to drive the light emitting element D to emit light. The first electrode may be an anode of the light emitting element D, which is not strictly limited in this embodiment.

[0079] The first end of the shunt branch 11 is electrically connected to the first electrode of the light-emitting element D, and the second end of the shunt branch 11 is electrically connected to the first reference voltage signal line Vref1. The shunt branch 11 can be used to transmit part of the driving current provided by the driving module 101 to the first reference voltage signal line Vref1.

[0080] It can be seen from the above description that an embodiment of the present application provides a pixel circuit 10, which includes a driving module 101 and a shunt branch 11. The driving module 101 is electrically connected to the first electrode of the light-emitting element D, and can be used to drive the light-emitting element D to emit light. The first end of the shunt branch 11 is electrically connected to the first electrode of the light-emitting element D, and the second end of the shunt branch 11 is electrically connected to the first reference voltage signal line Vref1, which can be used to transmit part of the driving current provided by the driving module 101 to the first reference voltage signal line Vref1.

[0081] Compared with the prior art, a pixel circuit 10 in an embodiment of the present application shunts the driving current provided by the driving module 101 through a shunt branch 11, so that a part of the driving current is transmitted to the light-emitting element D to drive the light-emitting element D to emit light, and the other part of the driving current is transmitted to the first reference voltage signal line Vref1, which is conducive to making the current flowing through the driving module 101 larger, that is, it is equivalent to indirectly raising the total current flowing through the driving module 101 through shunt.

[0082] In this way, the influence of the characteristic fluctuations of the electronic devices inside the pixel circuit 10 on the current becomes relatively smaller, so that the brightness of the light-emitting element D driven by the pixel circuit 10 reaches the expected brightness, thereby improving the brightness uniformity under low grayscale and low brightness and improving the picture quality, which in turn helps to improve the problem of uneven display of the display panel.

[0083] Please continue to see Figure 1 According to some embodiments of the present application, combined with actual application requirements, in order to ensure the flexible controllability of current shunting of the pixel circuit under different display working scenarios, the above-mentioned shunt branch 11 includes a shunt switch module 102.

[0084] like Figure 1 In the structure shown, the control end of the shunt switch module 102 is electrically connected to the target control signal line EN, the first end of the shunt switch module 102 is electrically connected to the first electrode of the light-emitting element D, and the second end of the shunt switch module 102 is electrically connected to the first reference voltage signal line Vref1.

[0085] The shunt switch module 102 can be turned on or off under the control of the target control signal line EN. When the signal provided by the target control signal line EN is at an enable level, the shunt switch module 102 is turned on to transmit part of the driving current provided by the driving module 101 to the first reference voltage signal line Vref1.

[0086] As an example, the driving module 101 may include a first transistor T1, and the shunt switch module 102 may include an eighth transistor T8. The gate of the eighth transistor T8 may receive a signal provided by the target control signal line EN. The first electrode of the eighth transistor T8 is electrically connected to the anode of the light-emitting element D, and the second electrode of the eighth transistor T8 is electrically connected to the first reference voltage signal line Vref1. The signal provided by the target control signal line EN may be a pulse signal, and the high and low levels (enable level and non-enable level) of the pulse signal are used to control the eighth transistor T8 to be turned on or off.

[0087] See below Figure 2 , Figure 21 is a schematic diagram of the structure of another pixel circuit 10 provided in an embodiment of the present application. According to some embodiments of the present application, optionally, the pixel circuit 10 further includes a first reset module 103 .

[0088] like Figure 2 As shown, the control end of the first reset module 103 is electrically connected to the first scan signal line S1, the first end of the first reset module 103 is electrically connected to the first electrode of the light emitting element D, and the second end of the first reset module 103 is electrically connected to the second reference voltage signal line Vref2.

[0089] The first reset module 103 can be turned on under the control of the first scan signal line S1 to transmit the second reference voltage signal of the second reference voltage signal line Vref2 to the first electrode of the light emitting element D, thereby resetting the first electrode of the light emitting element D.

[0090] According to some embodiments of the present application, more specifically, in combination with the specific pixel circuit operation timing considerations, in order to more reasonably implement the shunt function of the shunt switch module 102 and ensure the normal reset operation of the first reset module 103 on the light emitting element D, the shunt switch module 102 is turned on during the light emitting phase of the light emitting element D, and the first reset module 103 is turned on during the first reset phase. The first reset phase and the light emitting phase do not overlap in time.

[0091] In this embodiment, the driving module 101 provides current to drive the light-emitting element D to emit light during the light-emitting stage. The shunt switch module 102 is turned on during the light-emitting stage, which can effectively shunt the current of the driving module 101, thereby achieving the purpose of improving the "grayscale brightness" of the pixel circuit in disguise, thereby helping to improve the problem of uneven display of the display panel.

[0092] In the first reset phase that does not overlap with the light-emitting phase, the first reset module 103 is turned on to implement a reset initialization operation on the light-emitting element D. In the first reset phase, the shunt switch module 102 remains turned off, which can effectively avoid the current loss caused by the access of the first reference voltage signal line Vref1 when resetting the light-emitting element D, thereby helping to ensure the stability and reliability of the reset operation of the light-emitting element D.

[0093] Please continue to see Figure 2 According to some embodiments of the present application, optionally, the second electrode of the light emitting element D is electrically connected to the first power supply voltage signal line VSS, and the power supply voltage signal provided by the first power supply voltage signal line VSS may be a fixed negative voltage signal, such as -5 V. The first reference voltage signal line Vref1 and the first power supply voltage signal line VSS are different signal lines.

[0094] More specifically, considering that the requirements for the voltage value of the first reference voltage signal may be inconsistent in different brightness display scenarios, the first reference voltage signal transmitted by the first reference voltage signal line Vref1 may be a voltage signal with a variable voltage value. It should be understood that the voltage signal provided by the first reference voltage signal line may be flexibly changed according to the actual shunting requirements in different display scenarios, and this embodiment does not impose any specific restrictions thereon.

[0095] According to some embodiments of the present application, optionally, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenarios, the present application makes targeted settings for the specific scenarios in which the above-mentioned shunt switch module 102 is turned on, so as to effectively improve the display quality while minimizing the display power consumption.

[0096] Specifically, when the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first preset brightness threshold, the shunt switch module 102 is turned on under the control of the target control signal line EN. And, optionally, when the brightness of the light-emitting element D connected to the pixel circuit 10 is greater than the first preset brightness threshold, the shunt switch module 102 is turned off under the control of the target control signal line EN.

[0097] In specific implementation, for example, before displaying a frame of image, it is usually necessary to first obtain the image parameters of the image to be displayed (such as the image grayscale value or brightness value, etc.), and then determine the actual brightness required to be displayed by each pixel in the display panel based on the image parameters.

[0098] In this embodiment, illustratively, if it is detected that the brightness of the light-emitting element D connected to the pixel circuit 10 is less than the first preset brightness threshold, it means that the pixel circuit 10 is in a low grayscale and low brightness display scene. In this case, the target control signal line EN outputs an enable level, so that the shunt switch module 102 is turned on in response to the enable level provided by the target control signal line EN, so as to shunt the current flowing through the driving module 101.

[0099] On the contrary, if it is detected that the brightness of the light-emitting element D connected to the pixel circuit 10 is greater than the first preset brightness threshold, it means that the display scene of the pixel circuit 10 is a high-brightness scene, and it may not be necessary to increase the "grayscale brightness" of the pixel circuit in disguise through the above-mentioned shunting process. In this case, the above-mentioned target control signal line EN outputs a cut-off level, so that the shunting switch module 102 remains turned off in response to the enable level provided by the target control signal line EN.

[0100] It should be noted that the above-mentioned first preset brightness threshold can be flexibly set according to factors such as the display unevenness processing experience of relevant personnel, actual display requirements, or different panel characteristics, and this application does not make any specific restrictions on this.

[0101] According to some embodiments of the present application, optionally, for reasons similar to those of the aforementioned embodiments, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenes, therefore, in order to effectively improve the display quality while more fully reducing the display power consumption, the present embodiment also proposes: if the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is less than or equal to the first preset brightness threshold, the above-mentioned first reference voltage signal line can stop transmitting the first reference voltage signal, or transmit the first reference voltage signal whose voltage value is lower than the first voltage threshold. The above-mentioned first voltage threshold can be flexibly set according to the display unevenness processing experience of relevant personnel, actual display requirements, or different panel characteristics and other factors, and the present application does not impose specific restrictions on this.

[0102] According to some embodiments of the present application, more specifically, considering that the degree of diversion of the current flowing through the driving module 101 may not be consistent in different brightness display scenarios, based on this, the signal value of the voltage signal of the above-mentioned first reference voltage signal line Vref1 can be adjusted to be different to meet various diversion requirements in different display brightness scenarios.

[0103] Specifically, in this embodiment, when the brightness of the light-emitting element D connected to the pixel circuit 10 is the first brightness, the first reference voltage signal line Vref1 transmits a first reference voltage signal of a first voltage value. When the brightness of the light-emitting element D connected to the pixel circuit 10 is the second brightness, the first reference voltage signal line Vref1 transmits a first reference voltage signal of a second voltage value. Both the first brightness and the second brightness are less than or equal to the first preset brightness threshold, the first brightness is different from the second brightness, and the first voltage value is different from the second voltage value.

[0104] According to some embodiments of the present application, optionally, in order to make the screen brightness under different display brightness scenes reach the expected brightness as much as possible, if the first brightness is less than the second brightness, the first voltage value is less than the second voltage value. In other words, when the brightness is less than or equal to the first preset brightness threshold, the smaller the brightness, the smaller the voltage value of the first reference voltage signal transmitted by the first reference voltage signal line Vref1.

[0105] Specifically, in this embodiment, if the voltage value of the first reference voltage signal is smaller, the shunting ratio of the current flowing through the driving module 101 by the shunting branch 11 is larger, and the raising amplitude of the total current flowing through the driving module 101 is larger. In this way, it is helpful to more effectively achieve the purpose of improving the "grayscale brightness" of the pixel circuit in a disguised manner in low grayscale and low brightness scenes, thereby helping to fully improve the display quality and display effect of the display panel.

[0106] According to some embodiments of the present application, optionally, in combination with actual display scenarios, in order to more reasonably determine whether the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is less than or equal to a first preset brightness threshold, the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is less than or equal to the first preset brightness threshold, including: the brightness level of the display panel where the pixel circuit 10 is located is less than or equal to the first brightness level threshold, and / or, the grayscale of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first grayscale threshold, and / or, the average grayscale of multiple sub-pixels of the display panel where the pixel circuit is located in a frame of display image is less than or equal to the second grayscale threshold, and / or, the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in a frame of display image of the display panel where the pixel circuit is located is greater than the first number threshold, and / or, the number of sub-pixels whose grayscale is greater than the first grayscale threshold in a frame of display image of the display panel where the pixel circuit is located is less than or equal to the second number threshold.

[0107] Specifically, in the field of display technology, display panels often have different brightness levels. The same grayscale at different brightness levels exhibits different brightness, and different grayscales at the same brightness level exhibit different brightness.

[0108] Based on this, the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first preset brightness threshold, which may include: the brightness level of the display panel where the pixel circuit 10 is located is less than or equal to the first brightness level threshold. In this way, the problem of uneven display quality of the display panel at low brightness levels is improved by current shunting at low brightness levels.

[0109] And / or, the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first preset brightness threshold, which may include: the grayscale of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first grayscale threshold. In this way, the above-mentioned shunting operation is performed for low grayscale scenes under different brightness levels to improve the display unevenness defect in low grayscale scenes.

[0110] And / or, the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is less than or equal to the first preset brightness threshold, which may include: the average value of the grayscale of multiple sub-pixels in a frame display image of the display panel where the pixel circuit is located is less than or equal to the second grayscale threshold. Specifically, the grayscale of each sub-pixel can be determined after acquiring a frame display image of the display panel, and the average value of the grayscale of multiple sub-pixels in the image data is calculated. If the average value of the grayscale of multiple sub-pixels in a frame display image of the display panel is less than or equal to the second grayscale threshold, it means that the overall grayscale of this image data is low. In this case, it can be considered to improve the uneven display quality of low grayscale images by current shunting the driving current.

[0111] And / or, the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is less than or equal to the first preset brightness threshold, which may include: the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in a frame of display image of the display panel where the pixel circuit is located is greater than the first number threshold. Specifically, the grayscale of each sub-pixel can be determined after acquiring a frame of display image of the display panel, and the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in multiple sub-pixels in the image data is counted. If the number obtained by counting is greater than the first number threshold, it can still be explained that the overall grayscale of this image data is low. In this case, it can be considered to improve the uneven display quality of low grayscale images by current shunting the driving current.

[0112] And / or, the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is less than or equal to the first preset brightness threshold, which may include: the number of sub-pixels whose grayscale is greater than the first grayscale threshold in a frame of display image of the display panel where the pixel circuit is located is less than or equal to the second number threshold. Specifically, the grayscale of each sub-pixel can be determined after acquiring a frame of display image of the display panel, and the number of sub-pixels whose grayscale is greater than the first grayscale threshold in the multiple sub-pixels in the image data is counted. If the number obtained by counting is greater than the first number threshold, it can still be explained that the overall grayscale of the image data is low. In this case, it can be considered to improve the uneven display quality of low grayscale images by current shunting the driving current.

[0113] It should be added that, in some feasible embodiments, further, it can also be the brightness level of the integrated display panel, the grayscale of the light-emitting element D connected to the pixel circuit 10, the average grayscale of multiple sub-pixels of the display panel in a frame of display image, the number of sub-pixels of the display panel in a frame of display image whose grayscale is less than or equal to the first grayscale threshold, and the number of sub-pixels of the display panel in a frame of display image whose grayscale is greater than the first grayscale threshold, so as to start the current shunt operation in a low brightness level and low grayscale scene in a more targeted manner. In this way, the impact of the screen power consumption caused by the above-mentioned shunt operation can be further reduced, and at the same time, the display quality of the display panel in a low brightness level and low grayscale scene can be effectively guaranteed.

[0114] According to some embodiments of the present application, accordingly, the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is greater than the first preset brightness threshold, including: the brightness level of the display panel where the pixel circuit 10 is located is greater than the first brightness level threshold, and / or, the grayscale of the light-emitting element D connected to the pixel circuit 10 is greater than the first grayscale threshold, and / or, the average value of the grayscales of multiple sub-pixels of the display panel in a frame of displayed image is greater than the second grayscale threshold, and / or, the number of sub-pixels whose grayscales of the display panel in a frame of displayed image are less than or equal to the first grayscale threshold is less than or equal to the first number threshold, and / or, the number of sub-pixels whose grayscales of the display panel in a frame of displayed image are greater than the first grayscale threshold is greater than the second number threshold.

[0115] It should be understood here that this embodiment involves how to determine that the brightness of the light-emitting element D connected to the above-mentioned pixel circuit 10 is greater than the first preset brightness threshold, which corresponds to the implementation principle and implementation method of determining that the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first preset brightness threshold in the aforementioned embodiment. For the sake of brevity, this embodiment will not be elaborated here.

[0116] In addition, the specific values ​​of the above-mentioned first brightness level threshold, first grayscale threshold, second grayscale threshold, first quantity threshold and second quantity threshold can be flexibly set according to factors such as the display unevenness processing experience of relevant personnel, actual display requirements, or different panel characteristics, and this application does not impose any specific restrictions on this.

[0117] See below Figure 3 , Figure 3 is a schematic diagram of the structure of another pixel circuit 10 provided in an embodiment of the present application. Figure 3 As shown, according to some embodiments of the present application, optionally, in order to more reasonably implement the shunt operation of the driving current provided by the driving module 101 based on the shunt branch 11 , the shunt branch 11 may further include a voltage dividing module 104 .

[0118] When specifically connected, the voltage dividing module 104 is electrically connected between the first end of the current shunt switch module 102 and the first electrode of the light emitting element D ( Figure 3 The example shown), and / or, the voltage dividing module 104 is electrically connected between the second end of the shunt switch module 102 and the first reference voltage signal line Vref1.

[0119] In this embodiment, by setting the above-mentioned voltage divider module 104 in the shunt branch 11 to perform voltage division, it can effectively avoid the node potential of the first electrode of the light-emitting element D being the same as the voltage signal provided by the first reference voltage signal line Vref1 during shunt, which helps to ensure the normal light-emitting operation of the light-emitting element D connected to the pixel circuit 10.

[0120] According to some embodiments of the present application, more specifically, the voltage dividing module 104 includes a resistor. The impedance of the resistor may be a fixed value, and the resistor may be, for example, a semiconductor resistor, etc., which is not strictly limited here.

[0121] In this embodiment, the smaller the resistance impedance of the resistor is, the greater the shunt ratio of the shunt branch 11 to the driving current provided by the driving module 101 is, which is more conducive to indirectly increasing the total current flowing through the driving module 101 during actual driving operation.

[0122] In this way, the greater the total current flowing through the driving module 101, the smaller the impact of the characteristic fluctuations of the electronic devices inside the pixel circuit 10 on the current will be, which is more helpful to make the brightness of the light-emitting element driven by the pixel circuit reach the expected brightness, thereby improving the problem of uneven display.

[0123] According to some embodiments of the present application, optionally, considering that if the impedance of the above-mentioned resistor is too large, the smaller the shunting ratio of the shunt branch 11 to the driving current provided by the driving module 101, the less obvious the shunting effect, and the less help it provides for improving the display quality. Based on this, in order to effectively ensure the shunting effect of the shunt branch 11 on the current provided by the driving module 101, the impedance of the above-mentioned voltage divider module 104 is less than or equal to the impedance of the light-emitting element D.

[0124] See below Figure 4 , Figure 4 1 is a schematic diagram of a structure between a first reference voltage signal line Vref1 and a power module 200 provided in an embodiment of the present application. Figure 4 As shown, according to some embodiments of the present application, optionally, the first reference voltage signal line Vref1 is electrically connected to the first reference voltage signal output terminal of the power module 200. The power module 200 may be, for example, a display driver chip, etc., and no further restrictions are made here.

[0125] In this embodiment, when the display panel is working, the first reference voltage signal line Vref1 is linked to the power module 200. When it is detected that the first reference voltage signal line Vref1 needs to be shunted, the power module 200 provides the first reference voltage signal line Vref1 with a corresponding voltage value.

[0126] According to some embodiments of the present application, more specifically, the shunt branches 11 of at least two pixel circuits 10 are electrically connected to the first reference voltage signal output terminal through the same first reference voltage signal line Vref1. In other words, the first reference voltage signal lines Vref1 connected to the plurality of pixel circuits 10 are interconnected.

[0127] See below Figure 5 , Figure 5is a schematic diagram of the structure of another pixel circuit 10 provided in an embodiment of the present application. Figure 5 As shown, according to some embodiments of the present application, optionally, the control end of the driving module 101 is electrically connected to the first node N1, the first end of the driving module 101 is electrically connected to the second node N2, and the second end of the driving module 101 is electrically connected to the third node N3.

[0128] The pixel circuit 10 further includes a first light emitting control module 105 and / or a second light emitting control module 106. Figure 5 In the example shown, the pixel circuit 10 includes both a first light emitting control module 105 and a second light emitting control module 106 .

[0129] When specifically connected, the control end of the first light emitting control module 105 is electrically connected to the light emitting control signal line EM, the first end of the first light emitting control module 105 is electrically connected to the second power supply voltage signal line VDD, and the second end of the first light emitting control module 105 is electrically connected to the second node N2. The power supply voltage signal provided by the second power supply voltage signal line VDD can be a positive voltage signal.

[0130] The control end of the second light emitting control module 106 is electrically connected to the light emitting control signal line EM, the first end of the second light emitting control module 106 is electrically connected to the third node N3, and the second end of the second light emitting control module 106 is electrically connected to the first electrode of the light emitting element D.

[0131] During the light emitting phase of the light emitting element D connected to the pixel circuit 10, the light emitting control signal line EM provides a conduction level. The first light emitting control module 105 and the second light emitting control module 106 are turned on under the control of the light emitting control signal line EM to make the light emitting element D emit light.

[0132] Please continue to see Figure 5 According to some embodiments of the present application, optionally, in order to realize reasonable reuse of signal lines in the display panel to save wiring space and wiring cost, the target control signal line EN can specifically reuse the light-emitting control signal line EM. Alternatively, in order to meet the flexible control requirements of different functional modules in the pixel circuit 10, the target control signal line EN and the light-emitting control signal line EM can also be two different signal lines.

[0133] In this embodiment, the control ends of the shunt switch module 102, the first light-emitting control module 105, and the second light-emitting control module 106 are all electrically connected to the light-emitting control signal line EM. In the light-emitting stage of the light-emitting element D, the light-emitting control signal line EM transmits the provided conduction level to the control ends of the shunt switch module 102, the first light-emitting control module 105, and the second light-emitting control module 106, respectively, so that the modules are turned on in the light-emitting stage. In this way, by using the light-emitting control signal line EM as the target control signal line EN, it is possible to save wiring space and the number of signal lines while effectively ensuring that the shunt switch module 102 can shunt the current provided by the driving module 101 while the light-emitting element D is emitting light normally.

[0134] According to some embodiments of the present application, optionally, the target control signal line EN is electrically connected to the control terminals of the shunt switch modules 102 of at least two rows of pixel circuits 10, and each row of pixel circuits 10 includes a plurality of pixel circuits 10 arranged along the row direction. In other words, the control terminals of the shunt switch modules 102 in the plurality of rows of pixel circuits 10 can be electrically connected to the same target control line EN.

[0135] According to some embodiments of the present application, optionally, in order to effectively reduce the shunt power consumption in high-brightness scenes, if the target control signal line EN and the light-emitting control signal line EM are two different signal lines, when the brightness of the light-emitting element D connected to the pixel circuit 10 is greater than the first preset brightness threshold, the first reference voltage signal line Vref1 may not transmit the first reference voltage signal, that is, the first reference voltage signal line Vref1 may be in a suspended state. And / or, if the target control signal line EN and the light-emitting control signal line EM are two different signal lines, when the brightness of the light-emitting element D connected to the pixel circuit 10 is greater than the first preset brightness threshold, the shunt switch module 102 may be turned off under the control of the target control signal line EN.

[0136] See below Figure 6 , Figure 6 is a schematic diagram of the structure of another pixel circuit 10 provided in an embodiment of the present application. Figure 6 As shown, according to some embodiments of the present application, optionally, the pixel circuit 10 further includes a data writing module 107, a threshold compensation module 108, a second resetting module 109 and a storage module 110. The specific structures of the above modules are described below.

[0137] The control end of the data writing module 107 is electrically connected to the second scanning signal line S2, the first end of the data writing module 107 is electrically connected to the data signal line Vdata, and the second end of the data writing module 107 is electrically connected to the second node N2.

[0138] The control end of the threshold compensation module 108 is electrically connected to the third scan signal line S3 , the first end of the threshold compensation module 108 is electrically connected to the first node N1 , and the second end of the threshold compensation module 108 is electrically connected to the third node N3 .

[0139] The control end of the second reset module 109 is electrically connected to the fourth scan signal line S4, the first end of the second reset module 109 is electrically connected to the first node N1, and the second end of the second reset module 109 is electrically connected to the third reference voltage signal line Vref3. The second reset module 109 is used to be turned on under the control of the fourth scan signal line S4, and transmit the third reference voltage signal of the third reference voltage signal line Vref3 to the first node N1, so as to reset the first node N1.

[0140] A first terminal of the storage module 110 is electrically connected to the second power supply voltage signal line VDD, and a second terminal of the storage module 110 is electrically connected to the first node N1.

[0141] In order to facilitate understanding of the pixel circuit 10 provided by the present application, some specific application embodiments are described below. Figure 6 As shown, the driving module 101 may include a first transistor T1, the data writing module 107 may include a second transistor T2, the threshold compensation module 108 may include a third transistor T3, the storage module may include a storage capacitor Cst., the second reset module 109 may include a fourth transistor T4, the first light-emitting control module 105 may include a fifth transistor T5, the second light-emitting control module 106 may include a sixth transistor T6, the first reset module 103 may include a seventh transistor T7, and the shunt switch module 102 may include an eighth transistor T8. In addition, in order to reduce the influence of leakage current, the third transistor T3 and the fourth transistor T4 may both be IGZO (Indium Gallium Zinc Oxide) transistors, and the present application does not make specific restrictions on this.

[0142] For ease of understanding Figure 6 The working process of the pixel circuit 10 provided can be referred to below. Figure 7 .and Figure 6 The pixel circuit shown corresponds to, Figure 7 1 is a timing diagram of a pixel circuit 10 provided in an embodiment of the present application.

[0143] like Figure 7 As shown, in some embodiments, Figure 6 The specific working phases of the pixel circuit 10 shown may include: an initialization phase t1 , a data writing phase t2 , and a light emitting phase t3 .

[0144] In the initialization stage t1, the first transistor T1 can be turned on under the control of the first scan signal line S1, and transmit the second reference voltage signal of the second reference voltage signal line Vref2 to the first electrode of the light emitting element D, so as to reset the first electrode of the light emitting element D. The fourth transistor T4 can be turned on under the control of the fourth scan signal line S4, and transmit the third reference voltage signal of the third reference voltage signal line Vref3 to the first node N1, so as to reset the first node N1.

[0145] In the data writing stage t2, the second transistor T2 can be turned on under the control of the second scanning signal line S2, the third transistor T3 can be turned on under the control of the third scanning signal line S3, and the data signal of the data signal line Vdata is written into the first node N1 through the second transistor T2, the first transistor T1 and the third transistor T3 in sequence, completing the data signal writing and compensating the threshold voltage of the first transistor T1.

[0146] In the light emitting stage t3, the fifth transistor T5 and the sixth transistor T6 are turned on under the control of the light emitting control signal line EM, and the driving current of the first transistor T1 is transmitted to the first electrode of the light emitting element D through the sixth transistor T6, driving the light emitting element D to emit light.

[0147] It should be noted that the present embodiment is different from the conventional pixel circuit in that: Figure 7 The pixel circuit 10 is provided with an eighth transistor T8. The gate of the eighth transistor T8 is electrically connected to the target control signal line EN, the first electrode of the eighth transistor T8 is electrically connected to the anode of the light emitting element D, and the second electrode of the eighth transistor T8 is electrically connected to the first reference voltage signal line Vref1.

[0148] exist Figure 7 In the light emitting stage shown, the signal provided by the target control signal line EN is at an enable level, and the eighth transistor T8 is turned on under the control of the target control signal line EN to transmit part of the driving current provided by the first transistor M1 to the first reference voltage signal line Vref1.

[0149] For the sake of brevity, the specific working process of the pixel circuit 10 is not elaborated in detail in this embodiment.

[0150] It can be understood that the driving timing given in the embodiment of the present application is only a possible example. In some other embodiments, the working timing of the above-mentioned pixel circuit can also be flexibly adjusted according to actual conditions and needs, and the present application does not make any specific restrictions on it.

[0151] See below Figure 8 , Figure 8 is a schematic diagram of the structure of another pixel circuit 10 provided in an embodiment of the present application. Figure 8As shown, according to some embodiments of the present application, optionally, in order to further improve the display effect of the display panel, the pixel circuit 10 further includes a bias adjustment module 111, the control end of the bias adjustment module 111 is electrically connected to the fifth scan signal line S5, the first end of the bias adjustment module 111 is electrically connected to the bias voltage signal line VEH, and the second end of the bias adjustment module 111 is electrically connected to the second node N2 or the third node N3, which can be used to adjust the bias state of the driving module 101. As an example, the bias adjustment module 111 can specifically include a ninth transistor T9. The fifth scan signal line S5 can reuse the first scan signal line S1, that is, the first scan signal line S1 and the fifth scan signal line S5 are the same scan signal line.

[0152] It can be understood that, for reasons similar to those in the above-mentioned embodiment, considering the wide application of the 8T1C basic pixel structure in the field of panels, for the sake of brevity, the present embodiment will only describe the 8T1C basic pixel structure in detail. Figure 8 The specific working processes of other devices in the pixel circuit shown are not described in detail.

[0153] It should be noted that in addition to the several pixel circuit structures listed above, the pixel circuit 10 of the present application may also include other numbers of electronic devices with other connection relationships. These electronic devices (such as transistors, capacitors, etc.) together constitute various types of pixel circuits, and the present application does not impose any specific restrictions on this.

[0154] Based on the pixel circuit provided in the above embodiment, the embodiment of the present application provides a display module, which includes a display module including a display panel, and the display panel includes a pixel circuit provided in any of the above embodiments of the present application. The display panel provided in the embodiment of the present application can be AMOLED, OLED or other. Those skilled in the art should understand that in other implementations of the present application, the display panel can also be a micro light emitting diode display panel, a quantum dot display panel, etc.

[0155] Please refer to the following Fig. 9 , Fig. 9 This is a schematic diagram of the structure of a display module provided in an embodiment of the present application. Fig. 9 As shown, the display module 1000 provided in the embodiment of the present application may include the display panel 100 described in any of the above embodiments, and the display panel 100 includes the pixel circuit described in any of the above embodiments. The display module 1000 provided in the embodiment of the present application has the beneficial effects of the pixel circuit provided in the embodiment of the present application, and the specific description of the pixel circuit in the above embodiments can be referred to, and the present embodiment will not be repeated here.

[0156] See below Fig.10 , Fig.101 is a schematic diagram of the structure of a display panel 100 provided in an embodiment of the present application. Fig.10 As shown, the display panel 100 includes a display area AA and a non-display area NA. The display area AA can be used to display images, and the non-display area NA can be used to set wiring, etc. The display area AA includes a plurality of sub-pixels 20 arranged in an array, and the sub-pixels 20 include pixel circuits and light-emitting elements as described in any of the above embodiments.

[0157] In this embodiment, the first reference voltage signal line may include a sub-line S1 located in the display area AA and a main line S2 located in the non-display area NA. The sub-line S1 is electrically connected to a plurality of pixel circuits, and the sub-line S1 may receive the first reference voltage signal through the main line S2. It is worth noting that Fig.10 The thickness of the lines in the subsequent figures is only for better distinguishing the various routing lines, and is not used to limit the actual width of the various routing lines mentioned above.

[0158] Please continue to see Fig.10 According to some embodiments of the present application, more specifically, Fig.10 In the example shown, the secondary line S1 may include a plurality of first wiring portions S11 extending along a first direction X, and one first wiring portion S11 is electrically connected to a plurality of pixel circuits arranged along the first direction X. The main line S2 includes a first main line S21 extending along a second direction Y. The first direction X intersects with the second direction Y, and the first wiring portion S11 is electrically connected to the first main line S21. The number of the first main line S21 may be one, or may be as follows: Fig.10 The two lines shown are arranged on the two opposite side frames, and the present application does not impose strict restrictions on this.

[0159] It should be noted that Fig.10 In the example shown, the first direction X is the row direction and the second direction Y is the column direction for illustration, but the present invention is not limited thereto.

[0160] For some possible implementations, see Fig.11 , Fig.11 1 is a schematic diagram of the structure of a display panel 100 provided in an embodiment of the present application. Fig.11 As shown, the first direction X is the column direction and the second direction Y is the row direction. In this case, the above-mentioned secondary line S1 may include a plurality of first wiring portions S11 extending along the first direction X (column direction), and one first wiring portion S11 is electrically connected to a plurality of pixel circuits arranged along the first direction X. The main line S2 includes a first main line S21 extending along the second direction Y (row direction). The first direction X intersects with the second direction Y, and the first wiring portion S11 is electrically connected to the first main line S21.

[0161] Overall, Fig.10 or Fig.11In the structure shown, there is only a first horizontal or vertical routing portion S11 in the display area AA, which can effectively ensure the shunting function of each pixel circuit while saving the number of signal lines and layout space in the display area AA as much as possible, which is more conducive to improving the overall competitiveness of the display panel.

[0162] See below Fig.12 , Fig.12 1 is a schematic diagram of the structure of a display panel 100 provided in an embodiment of the present application. Fig.12 As shown, according to some embodiments of the present application, optionally, in addition to the plurality of first routing portions S11 extending along the first direction X, the secondary line S1 may further include a plurality of second routing portions S12 extending along the second direction Y. Any two adjacent second routing portions S12 are separated by a pixel circuit, and the second routing portion S12 is electrically connected to the plurality of first routing portions S11.

[0163] Please continue to see Fig.12 According to some embodiments of the present application, optionally, in addition to the aforementioned first main line S21 extending along the second direction Y, the above-mentioned main line S2 may also include a second main line S22 extending along the first direction X, and the first main line S21 and the plurality of second routing portions S12 are electrically connected to the second main line S22.

[0164] In this embodiment, by setting the display panel as follows Fig.12 The multiple first routing portions S11, the multiple second routing portions S12, the first main line S21 and the second main line S22 in the structure shown are used to arrange the first reference voltage signal line into a mesh shape, thereby effectively improving the driving capability of the first reference voltage signal line, which is beneficial to enhancing the shunting capability of the pixel circuit, and furthermore can fully improve the picture quality of the display panel.

[0165] Please continue to see Fig.10 , Fig.11 or Fig.12 According to some embodiments of the present application, optionally, in combination with the actual display module structure, in order to more reasonably implement the output of the first reference voltage signal, the display module 1000 further includes a power module. Fig.10 As shown, the first reference voltage signal terminal D1 of the power module is electrically connected to the main line S2. Thus, the secondary line S1 can be electrically connected to the first reference voltage signal output terminal D1 of the power module through the main line S2, thereby receiving the first reference voltage signal provided by the first reference voltage signal output terminal D1.

[0166] And, more specifically, the power module may include a display driver chip (DDIC, Display Driver Integrated Circuit) or a power chip PMIC (Power Management Integrated Circuit). Specifically, the selection of the display driver chip or the power chip may be determined according to different requirements and chip characteristics in actual application scenarios, and this embodiment does not impose too many restrictions on this.

[0167] See below Fig.13 , Fig.13 1 is a schematic diagram of the structure of a display panel 100 provided in an embodiment of the present application. Fig.13 As shown, according to some embodiments of the present application, optionally, the display panel 100 includes a first color sub-pixel P1, a second color sub-pixel P2 and a third color sub-pixel P3, and the first color sub-pixel P1, the second color sub-pixel P2 and the third color sub-pixel P3 are located in the display area AA of the display panel 100.

[0168] The above-mentioned secondary line S1 includes a first secondary line S101, a second secondary line S102 and a third secondary line S103. The above-mentioned main line S2 includes a first main line S201, a second main line S202 and a third main line S203.

[0169] The first reference voltage signal includes a first sub-reference voltage signal, a second sub-reference voltage signal and a third sub-reference voltage signal. The first sub-sub-line S101 is electrically connected to the pixel circuits of the plurality of first color sub-pixels P1 in the display area AA, and the first sub-sub-line S101 receives the first sub-reference voltage signal through the first sub-main line S201.

[0170] The second sub-line S102 is electrically connected to the pixel circuits of the plurality of second color sub-pixels P2 in the display area, and the second sub-line S102 receives the second sub-reference voltage signal through the second sub-main line S202. The third sub-line S103 is electrically connected to the pixel circuits of the plurality of third color sub-pixels P3 in the display area AA, and the third sub-line S103 receives the third sub-reference voltage signal through the third sub-main line S203.

[0171] The voltage values ​​of the first sub-reference voltage signal, the second sub-reference voltage signal and the third sub-reference voltage signal may be the same or different, and the present application does not impose strict restrictions on this. They may be set specifically in combination with the luminous characteristics of sub-pixels of different colors and diversion requirements.

[0172] In the present embodiment, according to the different colors of the sub-pixels in the display area AA, the above-mentioned first reference voltage signal is divided into a first sub-reference voltage signal, a second sub-reference voltage signal and a third sub-reference voltage signal, thereby forming three types of reference voltage signals corresponding to the first color sub-pixel P1, the second color sub-pixel P2 and the third color sub-pixel P3 respectively. This is conducive to achieving fine control over the degree of diversion of sub-pixels of different colors, which is more conducive to making the brightness of the light-emitting elements in each sub-pixel in the display panel reach the expected brightness, thereby helping to improve the problem of uneven display of the display panel.

[0173] According to some embodiments of the present application, optionally, the first color sub-pixel P1 includes a red sub-pixel, the second color sub-pixel P2 includes a green sub-pixel, and the third color sub-pixel P3 includes a blue sub-pixel. In some other embodiments, the first color sub-pixel P1 may also be a green sub-pixel, or a blue sub-pixel, etc., which is not specifically limited in this embodiment.

[0174] Continue as Fig.13 As shown, according to some embodiments of the present application, optionally, in combination with the actual display module structure, in order to more reasonably realize the output of the first sub-reference voltage signal, the second sub-reference voltage signal and the third sub-reference voltage signal, so that the brightness of the light-emitting element in each sub-pixel in the display panel can reach the expected brightness, the above-mentioned display module 1000 may also include a power supply module.

[0175] like Fig.13 As shown, the first reference voltage signal output terminal D1 of the power module may include a first sub-reference voltage signal output terminal D11, a second sub-reference voltage signal output terminal D12, and a third sub-reference voltage signal output terminal D13. The first sub-reference voltage signal output terminal D11 is electrically connected to the first sub-main line S21, the second sub-reference voltage signal output terminal D12 is electrically connected to the second sub-main line S22, and the third sub-reference voltage signal output terminal D13 is electrically connected to the third sub-main line S23.

[0176] Specifically, the first sub-line S101 is electrically connected to the pixel circuits of the plurality of first color sub-pixels P1 in the display area AA, and the first sub-line S101 is electrically connected to the first sub-reference voltage signal output terminal D11 through the first sub-line S201.

[0177] The second sub-line S102 is electrically connected to the pixel circuits of the plurality of second color sub-pixels P2 in the display area AA, and the second sub-line S102 is electrically connected to the second sub-reference voltage signal output terminal D12 through the second sub-main line S202.

[0178] The third sub-line S103 is electrically connected to the pixel circuits of a plurality of third color sub-pixels P3 in the display area AA, and the third sub-line S103 is electrically connected to the third sub-reference voltage signal output terminal D13 through the third sub-main line S203.

[0179] In this embodiment, the first reference voltage signal line is divided according to the different colors of the sub-pixels in the display area AA, so as to form three groups of mesh wiring corresponding to the first color sub-pixel P1, the second color sub-pixel P2 and the third color sub-pixel P3 respectively. The voltage values ​​on the mesh wiring corresponding to the sub-pixels of different colors can be provided by the first sub-reference voltage signal output terminal D11, the second sub-reference voltage signal output terminal D12 and the third sub-reference voltage signal output terminal D13 of the power module respectively.

[0180] This also means that if the signal values ​​of the voltage signals output by the first sub-reference voltage signal output terminal D11, the second sub-reference voltage signal output terminal D12 and the third sub-reference voltage signal output terminal D13 are different, the voltage values ​​of the first reference voltage signal used to shunt currents to sub-pixels of different colors may be different. In this way, the currents in sub-pixels of different colors can be finely controlled, which is more conducive to making the brightness of the light-emitting elements in each sub-pixel in the display panel reach the expected brightness, thereby helping to improve the problem of uneven display of the display panel.

[0181] According to some embodiments of the present application, optionally, considering the partition display scene of the display panel, the brightness display conditions of different display partitions may not be consistent. Based on this, in order to achieve fine adjustment of the brightness of different display areas, the above-mentioned display panel 100 includes a display area AA and a non-display area NA, and the display area AA includes M partitions, each partition includes at least one sub-pixel 20, and the sub-pixel 20 includes a pixel circuit and a light-emitting element, and M is an integer greater than 1.

[0182] The display module 1000 includes M first reference voltage signal lines, one first reference voltage signal line corresponds to one partition, and one first reference voltage signal line is electrically connected to the pixel circuit in the corresponding partition; the voltage values ​​of the first reference voltage signals received by the M first reference voltage signal lines are the same or different.

[0183] More specifically, the display module 1000 may further include a power module. The power module may include at least M first reference voltage signal output terminals D1, and the M first reference voltage signal output terminals D1 are electrically connected to the M first reference voltage signal lines in a one-to-one correspondence.

[0184] In this embodiment, by dividing the display area AA into a plurality of partitions, the pixel circuits in each partition are connected to a first reference voltage signal line corresponding to the partition, and each first reference voltage signal line is electrically connected to the first reference voltage signal output terminal D1 corresponding to the first reference voltage signal line. In this way, different first reference voltage signal lines and their corresponding first reference voltage signal output terminals D1 can provide first reference voltage signals of different voltage values ​​to different partitions, which can achieve the purpose of finely controlling the current of the pixel circuits in different partitions, and is more conducive to making the brightness of the light-emitting elements in each partition of the display panel reach the expected brightness of each partition, thereby being more conducive to improving the problem of uneven display of the display panel.

[0185] According to some embodiments of the present application, optionally, considering that uneven display of the display panel image is more likely to occur in low grayscale and low brightness scenarios, the present application makes targeted settings for the transmission scenarios of the above-mentioned first reference voltage signal to effectively improve the display quality while minimizing display power consumption.

[0186] Specifically, the display panel 100 includes a display area AA and a non-display area NA, and a plurality of sub-pixels 20 arranged in an array are located in the display area AA, and the sub-pixels 20 include a pixel circuit and a light-emitting element. When the target brightness of the display panel 100 is less than or equal to the first preset brightness threshold, the first reference voltage signal is transmitted to the first reference voltage signal line through the first reference voltage signal output terminal D1.

[0187] In specific implementation, for example, before displaying a frame of picture, it is usually necessary to first obtain image data of the picture to be displayed on the display panel. After obtaining the image data, the target brightness of the display panel can be determined according to the image data, so as to determine whether it is necessary to transmit the first reference voltage signal to the first reference voltage signal line through the first reference voltage signal output terminal D1 according to the target brightness.

[0188] More specifically, the target brightness of the display panel 100 includes the average brightness of the plurality of sub-pixels 20 in the display panel 100, that is, the target brightness may be the average brightness of the plurality of sub-pixels in the display panel 100. However, it should be understood that the above method for determining the target brightness is only a possible example and should not substantially limit the target brightness in the present application.

[0189] According to some embodiments of the present application, optionally, in order to facilitate the reasonable shunt control of the pixel circuit in each sub-pixel, the shunt branch in the above-mentioned pixel circuit includes a shunt switch module, the control end of the shunt switch module is electrically connected to the target control signal line, the first end of the shunt switch module is electrically connected to the first electrode of the light-emitting element, the second end of the shunt switch module is electrically connected to the first reference voltage signal line, and the target control signal line is electrically connected to the power supply module.

[0190] According to some embodiments of the present application, more specifically, when the target brightness of the display panel 100 is less than or equal to a first preset brightness threshold, an enable level is transmitted to the target control signal line to turn on the corresponding shunt switch module, thereby realizing the shunt operation of sub-pixels in the display panel in scenarios such as low grayscale and low brightness, thereby effectively improving the display quality of the display panel.

[0191] According to some embodiments of the present application, accordingly, when the target brightness of the display panel 100 is greater than a first preset brightness threshold, a non-enable level is transmitted to the target control signal line to keep the corresponding shunt switch module cut off, thereby stopping the shunt operation of the sub-pixels in the display panel in scenarios such as high grayscale and high brightness, thereby helping to reduce display power consumption in such scenarios.

[0192] According to some embodiments of the present application, optionally, the target brightness of the display panel 100 is less than or equal to a first preset brightness threshold, including: the brightness level of the display panel 100 is less than or equal to the first brightness level threshold, and / or the average value of the grayscales of multiple sub-pixels 20 of the display panel 100 in a frame of displayed image is less than or equal to the second grayscale threshold, and / or the number of sub-pixels 20 of the display panel 100 in a frame of displayed image whose grayscale is less than or equal to the first grayscale threshold is greater than the first number threshold, and / or the number of sub-pixels 20 of the display panel 100 in a frame of displayed image whose grayscale is greater than the first grayscale threshold is less than or equal to the second number threshold.

[0193] It should be added that the grayscale of the sub-pixel in the display panel 100 may refer to the grayscale of the corresponding sub-pixel in a frame of an image displayed by the display panel. Also, it should be understood that for the sake of brevity, the specific implementation process of some of the above embodiments can refer to the corresponding description part above, which will not be repeated here.

[0194] According to some embodiments of the present application, optionally, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenes, in order to effectively improve the display quality and more fully reduce the display power consumption, the first reference voltage signal line does not transmit the first reference voltage signal when the target brightness of the display panel 100 is greater than the first preset brightness threshold. That is, the first reference voltage signal line Vref1 can be in a suspended state. And / or, if the target control signal line and the light control signal line are two different signal lines, when the target brightness of the display panel 100 is greater than the first preset brightness threshold, the shunt switch module 102 can be turned off under the control of the target control signal line EN.

[0195] According to some embodiments of the present application, accordingly, the target brightness of the display panel is greater than the first preset brightness threshold value, including: the brightness level of the display panel is greater than the first brightness level threshold value, and / or, the average value of the grayscales of multiple sub-pixels of the display panel in a frame of displayed image is greater than the second grayscale threshold value, and / or, the number of sub-pixels of the display panel in a frame of displayed image whose grayscale is less than or equal to the first grayscale threshold value is less than or equal to the first number threshold value, and / or, the number of sub-pixels of the display panel in a frame of displayed image whose grayscale is greater than the first grayscale threshold value is greater than the second number threshold value.

[0196] According to some embodiments of the present application, optionally, more specifically, considering that the degree of diversion required for sub-pixel driving current in different brightness display scenarios may not be consistent, based on this, the first reference voltage signal transmitted by the first reference voltage signal line can be set to be different to meet various diversion requirements in different display brightness scenarios.

[0197] Specifically, in this embodiment, when the target brightness of the display panel 100 is the first target brightness, the first reference voltage signal line transmits a first reference voltage signal of a first target voltage value; when the target brightness of the display panel is the second target brightness, the first reference voltage signal line transmits a first reference voltage signal of a second target voltage value; the first target brightness and the second target brightness are both less than or equal to a first preset brightness threshold, the first target brightness is different from the second target brightness, and the first target voltage value is different from the second target voltage value.

[0198] According to some embodiments of the present application, optionally, in order to ensure that the screen brightness in different display brightness scenes can reach the expected brightness as much as possible, if the first target brightness is less than the second target brightness, the first target voltage value is less than the second target voltage value.

[0199] Specifically, in this embodiment, if the voltage value of the target brightness is smaller, the voltage value of the first reference voltage signal transmitted by the first reference voltage signal line is set to be smaller, and the degree of diversion is higher, so that the image quality improvement effect brought about by the diversion will be more obvious, which is more conducive to more effectively achieving the purpose of disguisedly improving the "grayscale brightness" of the pixel circuit in the display panel in low grayscale and low brightness scenes, thereby helping to fully improve the display quality and display effect of the display panel.

[0200] It is understandable that the above-mentioned display module provided in the embodiment of the present application can be installed on a display device, and the display device can be a wearable product, a computer, a television, a car display device, or other display devices with display functions, and the present application does not impose specific restrictions on this. The display device provided in the embodiment of the present application has the beneficial effects of the pixel circuit / display panel provided in the previous embodiment of the present application, and the specific description of the pixel circuit / display panel in the above embodiments can be referred to, and this embodiment will not be repeated here.

[0201] It should be understood that the specific structure of the circuit and the cross-sectional structure of the display panel provided in the drawings of the embodiments of the present application are only some examples and are not used to limit the present application. In addition, the above embodiments provided by the present application can be combined with each other if there is no contradiction.

[0202] It should be clear that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. According to the embodiments described above in this application, these embodiments do not describe all the details in detail, nor do they limit the application to only the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that technicians in the relevant technical field can make good use of the application and the modified use based on the application. The application is only limited by the claims and their full scope and equivalents.

[0203] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other structures; the quantity involves "one" but does not exclude multiple; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A pixel circuit, characterized in that: include: A driving module, the driving module is electrically connected to the first electrode of the light-emitting element, and the driving module is used to drive the light-emitting element to emit light; A shunt branch, a first end of which is electrically connected to the first electrode of the light-emitting element, a second end of which is electrically connected to the first reference voltage signal line, and the shunt branch is used to transmit part of the driving current provided by the driving module to the first reference voltage signal line.

2. The pixel circuit according to claim 1, characterized in that: The first reference voltage signal transmitted by the first reference voltage signal line is a voltage signal with a variable voltage value.

3. The pixel circuit according to claim 1, characterized in that: The shunt branch includes a shunt switch module, a control end of the shunt switch module is electrically connected to the target control signal line, a first end of the shunt switch module is electrically connected to the first electrode of the light-emitting element, a second end of the shunt switch module is electrically connected to the first reference voltage signal line, and the shunt switch module is used to be turned on or off under the control of the target control signal line; Preferably, the pixel circuit further comprises a first reset module, a control end of the first reset module is electrically connected to the first scan signal line, a first end of the first reset module is electrically connected to the first electrode of the light emitting element, a second end of the first reset module is electrically connected to the second reference voltage signal line, and the first reset module is configured to be turned on under the control of the first scan signal line, transmit the second reference voltage signal on the second reference voltage signal line to the first electrode of the light emitting element, and reset the first electrode of the light emitting element; Preferably, the shunt switch module is turned on during the light-emitting phase of the light-emitting element, the first reset module is turned on during the first reset phase, and the first reset phase does not overlap with the light-emitting phase in time; Preferably, the second electrode of the light emitting element is electrically connected to a first power supply voltage signal line, and the first reference voltage signal line and the first power supply voltage signal line are different signal lines.

4. The pixel circuit according to claim 3, characterized in that: When the brightness of the light-emitting element connected to the pixel circuit is less than or equal to a first preset brightness threshold, the shunt switch module is turned on under the control of the target control signal line; Preferably, when the brightness of the light-emitting element connected to the pixel circuit is a first brightness, the first reference voltage signal line transmits a first reference voltage signal of a first voltage value; When the brightness of the light-emitting element connected to the pixel circuit is a second brightness, the first reference voltage signal line transmits a first reference voltage signal of a second voltage value; The first brightness and the second brightness are both less than or equal to the first preset brightness threshold, the first brightness is different from the second brightness, and the first voltage value is different from the second voltage value; Preferably, the first brightness is smaller than the second brightness, and the first voltage value is smaller than the second voltage value.

5. The pixel circuit according to claim 4, characterized in that: The brightness of the light-emitting element connected to the pixel circuit is less than or equal to a first preset brightness threshold value, including: the brightness level of the display panel where the pixel circuit is located is less than or equal to the first brightness level threshold value, and / or, the grayscale of the light-emitting element connected to the pixel circuit is less than or equal to the first grayscale threshold value, and / or, the average grayscale of multiple sub-pixels of the display panel where the pixel circuit is located in a frame of displayed image is less than or equal to a second grayscale threshold value, and / or, the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in a frame of displayed image on the display panel where the pixel circuit is located is greater than a first number threshold value, and / or, the number of sub-pixels whose grayscale is greater than the first grayscale threshold in a frame of displayed image on the display panel where the pixel circuit is located is less than or equal to a second number threshold value.

6. The pixel circuit according to claim 3, characterized in that: When the brightness of the light-emitting element connected to the pixel circuit is greater than the first preset brightness threshold, the first reference voltage signal line does not transmit the first reference voltage signal, and / or the shunt switch module is turned off under the control of the target control signal line; Preferably, the brightness of the light-emitting element connected to the pixel circuit is greater than the first preset brightness threshold, including: the brightness level of the display panel where the pixel circuit is located is greater than the first brightness level threshold, and / or, the grayscale of the light-emitting element connected to the pixel circuit is greater than the first grayscale threshold, and / or, the average grayscale of multiple sub-pixels of the display panel where the pixel circuit is located in a frame of displayed image is greater than the second grayscale threshold, and / or, the number of sub-pixels whose grayscale is less than or equal to the first grayscale threshold in a frame of displayed image of the display panel where the pixel circuit is located is less than or equal to the first number threshold, and / or, the number of sub-pixels whose grayscale is greater than the first grayscale threshold in a frame of displayed image of the display panel where the pixel circuit is located is greater than the second number threshold.

7. The pixel circuit according to claim 3, characterized in that: The shunt branch further includes a voltage dividing module, the voltage dividing module is electrically connected between the first end of the shunt switch module and the first electrode of the light emitting element, and / or, the voltage dividing module is electrically connected between the second end of the shunt switch module and the first reference voltage signal line; Preferably, the voltage dividing module comprises a resistor; Preferably, the impedance of the voltage divider module is less than or equal to the impedance of the light emitting element; Preferably, the first reference voltage signal line is electrically connected to the first reference voltage signal output terminal of the power module; Preferably, the shunt branches of at least two of the pixel circuits are electrically connected to the first reference voltage signal output terminal through the same first reference voltage signal line.

8. The pixel circuit according to claim 3, characterized in that: The control end of the driving module is electrically connected to the first node, the first end of the driving module is electrically connected to the second node, and the second end of the driving module is electrically connected to the third node; The pixel circuit further includes a first light emitting control module and / or a second light emitting control module, wherein: The control end of the first light emitting control module is electrically connected to the light emitting control signal line, the first end of the first light emitting control module is electrically connected to the second power supply voltage signal line, and the second end of the first light emitting control module is electrically connected to the second node; The control end of the second light emitting control module is electrically connected to the light emitting control signal line, the first end of the second light emitting control module is electrically connected to the third node, and the second end of the second light emitting control module is electrically connected to the first electrode of the light emitting element; Preferably, the target control signal line multiplexes the light-emission control signal line, or the target control signal line and the light-emission control signal line are two different signal lines; Preferably, the target control signal line is electrically connected to the control end of the shunt switch module of at least two rows of pixel circuits, and each row of pixel circuits includes a plurality of the pixel circuits arranged along the row direction.

9. The pixel circuit according to claim 8, characterized in that: The pixel circuit further comprises: a data writing module, wherein a control end of the data writing module is electrically connected to the second scanning signal line, a first end of the data writing module is electrically connected to the data signal line, and a second end of the data writing module is electrically connected to the second node; a threshold compensation module, wherein a control end of the threshold compensation module is electrically connected to the third scan signal line, a first end of the threshold compensation module is electrically connected to the first node, and a second end of the threshold compensation module is electrically connected to the third node; a second reset module, wherein a control end of the second reset module is electrically connected to the fourth scan signal line, a first end of the second reset module is electrically connected to the first node, and a second end of the second reset module is electrically connected to the third reference voltage signal line, and the second reset module is used to be turned on under the control of the fourth scan signal line, transmit the third reference voltage signal of the third reference voltage signal line to the first node, and reset the first node; a storage module, wherein a first end of the storage module is electrically connected to the second power supply voltage signal line, and a second end of the storage module is electrically connected to the first node; Preferably, the pixel circuit further includes: A bias adjustment module, wherein a control end of the bias adjustment module is electrically connected to the fifth scan signal line, a first end of the bias adjustment module is electrically connected to the bias voltage signal line, and a second end of the bias adjustment module is electrically connected to the second node or the third node.

10. A display module, characterized in that: The display module includes a display panel, and the display panel includes the pixel circuit according to any one of claims 1 to 9.

11. The display module according to claim 10, characterized in that: The display panel includes a display area and a non-display area, the display area includes a plurality of sub-pixels arranged in an array, and the sub-pixels include the pixel circuit and the light-emitting element; The first reference voltage signal line includes a sub-line located in the display area and a main line located in the non-display area, the sub-line is electrically connected to a plurality of the pixel circuits, and the sub-line receives a first reference voltage signal through the main line; Preferably, the secondary line includes a plurality of first wiring portions extending along a first direction, one of the first wiring portions is electrically connected to a plurality of the pixel circuits arranged along the first direction, and the main line includes a first main line extending along a second direction, the first direction intersects the second direction, and the first wiring portion is electrically connected to the first main line; Preferably, the secondary line further includes a plurality of second wiring portions extending along the second direction, any two adjacent second wiring portions are separated by the pixel circuit, and the second wiring portion is electrically connected to the plurality of first wiring portions; Preferably, the main line further includes a second main line extending along the first direction, and the first main line and the plurality of second routing portions are electrically connected to the second main line; Preferably, the display module further comprises a power module, and a first reference voltage signal output terminal of the power module is electrically connected to the main line; Preferably, the power module includes a display driver chip or a power chip.

12. The display module according to claim 11, characterized in that: The display panel comprises a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, the first color sub-pixel, the second color sub-pixel and the third color sub-pixel are located in a display area of ​​the display panel, the sub-line comprises a first sub-sub-line, a second sub-sub-line and a third sub-sub-line, the main line comprises a first sub-main line, a second sub-main line and a third sub-main line, and the first reference voltage signal comprises a first sub-reference voltage signal, a second sub-reference voltage signal and a third sub-reference voltage signal; The first sub-sub-line is electrically connected to the pixel circuits of the plurality of first color sub-pixels in the display area, and the first sub-sub-line receives the first sub-reference voltage signal through the first sub-main line; The second sub-line is electrically connected to the pixel circuits of the plurality of second color sub-pixels in the display area, and the second sub-line receives the second sub-reference voltage signal through the second sub-line; The third sub-line is electrically connected to the pixel circuits of the plurality of third color sub-pixels in the display area, and the third sub-line receives the third sub-reference voltage signal through the third sub-line; Preferably, the first color sub-pixel includes a red sub-pixel, the second color sub-pixel includes a green sub-pixel, and the third color sub-pixel includes a blue sub-pixel; Preferably, the display module also includes a power supply module, and the first reference voltage signal output terminal of the power supply module includes a first sub-reference voltage signal output terminal, a second sub-reference voltage signal output terminal and a third sub-reference voltage signal output terminal, the first sub-reference voltage signal output terminal is electrically connected to the first sub-main line, the second sub-reference voltage signal output terminal is electrically connected to the second sub-main line, and the third sub-reference voltage signal output terminal is electrically connected to the third sub-main line.

13. The display module according to claim 10, characterized in that: The display panel includes a display area and a non-display area, the display area includes M partitions, one of the partitions includes at least one sub-pixel, the sub-pixel includes the pixel circuit and the light-emitting element, and M is an integer greater than 1; The display module comprises M first reference voltage signal lines, one first reference voltage signal line corresponds to one partition, and one first reference voltage signal line is electrically connected to the pixel circuit in the corresponding partition; The voltage values ​​of the first reference voltage signals received by the M first reference voltage signal lines are the same or different; Preferably, the display module further includes a power module, the power module includes at least M first reference voltage signal output terminals, and the M first reference voltage signal output terminals are electrically connected to the M first reference voltage signal lines in a one-to-one correspondence.

14. The display module according to claim 10, characterized in that: The display panel comprises a display area and a non-display area, a plurality of sub-pixels arranged in an array are located in the display area, and the sub-pixels comprise the pixel circuit and the light-emitting element; When the target brightness of the display panel is less than or equal to a first preset brightness threshold, the first reference voltage signal line transmits a first reference voltage signal; Preferably, the shunt branch includes a shunt switch module, a control end of the shunt switch module is electrically connected to the target control signal line, a first end of the shunt switch module is electrically connected to the first electrode of the light-emitting element, and a second end of the shunt switch module is electrically connected to the first reference voltage signal line; Preferably, when the target brightness of the display panel is less than or equal to the first preset brightness threshold, the target control signal line transmits an enable level; Preferably, when the target brightness of the display panel is greater than the first preset brightness threshold, the target control signal line transmits a non-enable level; Preferably, the target brightness of the display panel being less than or equal to a first preset brightness threshold comprises: the brightness level of the display panel being less than or equal to the first brightness level threshold, and / or the average value of the grayscales of the plurality of sub-pixels of the display panel in a frame of displayed image being less than or equal to a second grayscale threshold, and / or the number of the sub-pixels of which the grayscale of the display panel in a frame of displayed image is less than or equal to the first grayscale threshold is greater than a first number threshold, and / or the number of the sub-pixels of which the grayscale of the display panel in a frame of displayed image is greater than the first grayscale threshold is less than or equal to a second number threshold; Preferably, when the target brightness of the display panel is a first target brightness, the first reference voltage signal line transmits a first reference voltage signal of a first target voltage value; when the target brightness of the display panel is a second target brightness, the first reference voltage signal line transmits a first reference voltage signal of a second target voltage value; the first target brightness and the second target brightness are both less than or equal to the first preset brightness threshold, the first target brightness is different from the second target brightness, and the first target voltage value is different from the second target voltage value; Preferably, the first target brightness is smaller than the second target brightness, and the first target voltage value is smaller than the second target voltage value.

15. The display module according to claim 10, characterized in that: When the target brightness of the display panel is greater than the first preset brightness threshold, the first reference voltage signal line does not transmit the first reference voltage signal, and / or the shunt switch module is turned off under the control of the target control signal line; Preferably, the target brightness of the display panel includes an average brightness of a plurality of the sub-pixels in the display panel; Preferably, the target brightness of the display panel is greater than a first preset brightness threshold value, including: the brightness level of the display panel is greater than the first brightness level threshold value, and / or the average value of the grayscales of the plurality of sub-pixels of the display panel in a frame of displayed image is greater than a second grayscale threshold value, and / or the number of the sub-pixels of the display panel whose grayscale in a frame of displayed image is less than or equal to the first grayscale threshold value is less than or equal to a first number threshold value, and / or the number of the sub-pixels of the display panel whose grayscale in a frame of displayed image is greater than the first grayscale threshold value is greater than a second number threshold value.

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