Pixel circuit and display module

Abstract

This application provides a pixel circuit and display module, relating to the field of display panels. The pixel circuit includes: a driving module electrically connected to a first electrode of a light-emitting element, the driving module driving the light-emitting element to emit light; and a shunt branch, a first end of which is electrically connected to the first electrode of the light-emitting element, and a second end of which is electrically connected to a first reference voltage signal line, the shunt branch transmitting a portion of the driving current provided by the driving module to the first reference voltage signal line. According to the pixel circuit and display module of this application, the problem of uneven brightness in display panels can be significantly improved, thereby effectively enhancing the display effect and performance of the display panel.

Description

Technical Field

[0001] This application belongs to the field of display panel technology, and in particular relates to a pixel circuit and display module. Background Technology

[0002] With the rapid development of display technology, full-screen displays have become a trend in mobile display devices such as smartphones. Organic Light Emitting Display (OLED) and flat panel displays based on Light Emitting Diode (LED) technologies are widely used in various consumer electronics products such as mobile phones, televisions, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thinness, and wide application range, becoming the mainstream display device. However, the performance of current OLED display products still needs improvement. Summary of the Invention

[0003] This application provides a pixel circuit and a display module that can significantly improve the problem of uneven brightness in the display panel, thereby effectively enhancing the display effect and performance of the display panel.

[0004] In a first aspect, embodiments of this application provide a pixel circuit, the pixel circuit comprising:

[0005] The driving module is electrically connected to the first electrode of the light-emitting element and is used to drive the light-emitting element to emit light.

[0006] The shunt branch has a first end electrically connected to the first electrode of the light-emitting element and a second end electrically connected to the first reference voltage signal line. 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 embodiment of the first aspect of this 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 an embodiment of the first aspect of this application, the shunt branch includes a shunt switch module, the control terminal of the shunt switch module is electrically connected to the target control signal line, the first terminal of the shunt switch module is electrically connected to the first electrode of the light-emitting element, and the second terminal 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 embodiment of the first aspect of this application, the pixel circuit further includes a first reset module. The control terminal of the first reset module is electrically connected to the first scan signal line, the first terminal of the first reset module is electrically connected to the first electrode of the light-emitting element, and the second terminal of the first reset module is electrically connected to the second reference voltage signal line. The first reset module is used to turn 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.

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

[0011] According to an embodiment of the first aspect of this 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 embodiment of the first aspect of this 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 embodiment of the first aspect of this 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; both the first brightness and the second brightness are 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 embodiment of the first aspect of this application, the first brightness is less than the second brightness, and the first voltage value is less than the second voltage value.

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

[0016] According to an embodiment of the first aspect of this 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 embodiment of the first aspect of this application, the brightness of the light-emitting element connected to the pixel circuit being greater than a first preset brightness threshold includes: the brightness level of the display panel where the pixel circuit is located being greater than a first brightness level threshold, and / or, the grayscale of the light-emitting element connected to the pixel circuit being greater than a first grayscale threshold, and / or, the average grayscale of multiple sub-pixels in a frame of a display image where the pixel circuit is located being greater than a second grayscale threshold, and / or, the number of sub-pixels in a frame of a display image where the pixel circuit is located being less than or equal to the first grayscale threshold being less than or equal to a first quantity threshold, and / or, the number of sub-pixels in a frame of a display image where the pixel circuit is located being located being greater than the first grayscale threshold being greater than a second quantity threshold.

[0018] According to an embodiment of the first aspect of this application, the shunt branch further includes a voltage divider module, which is electrically connected between the first terminal 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 terminal of the shunt switch module and the first reference voltage signal line.

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

[0020] According to an embodiment of the first aspect of this 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 embodiment of the first aspect of this application, the first reference voltage signal line is electrically connected to the first reference voltage signal output terminal of the power supply module.

[0022] According to an embodiment of the first aspect of this application, at least two pixel circuits have their shunt branches electrically connected to the first reference voltage signal output terminal via the same first reference voltage signal line.

[0023] According to an embodiment of the first aspect of this application, the control terminal 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 terminal 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 terminal 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 the first aspect of this application, the target control signal line is multiplexed with the light emission control signal line, or the target control signal line and the light emission control signal line are two different signal lines.

[0025] According to an embodiment of the first aspect of this application, the target control signal line is electrically connected to the control terminal 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 embodiment of the first aspect of this application, the pixel circuit further includes: a data writing module, the control terminal of which is electrically connected to a second scan signal line, the first terminal of which is electrically connected to a data signal line, and the second terminal of which is electrically connected to a second node; a threshold compensation module, the control terminal of which is electrically connected to a third scan signal line, the first terminal of which is electrically connected to a first node, and the second terminal of which is electrically connected to a third node; a second reset module, the control terminal of which is electrically connected to a fourth scan signal line, the first terminal of which is electrically connected to the first node, and the second terminal of which is electrically connected to a third reference voltage signal line, the second reset module being used to conduct under the control of the fourth scan signal line, transmitting the third reference voltage signal of the third reference voltage signal line to the first node, and resetting the first node; and a storage module, the first terminal of which is electrically connected to a second power supply voltage signal line, and the second terminal of which is electrically connected to the first node.

[0027] According to an embodiment of the first aspect of this application, the pixel circuit further includes: a bias adjustment module, the control terminal of the bias adjustment module being electrically connected to the fifth scan signal line, the first terminal of the bias adjustment module being electrically connected to the bias voltage signal line, and the second terminal of the bias adjustment module being electrically connected to the second node or the third node.

[0028] Secondly, embodiments of this application provide a display module, which includes a display panel and the display panel includes pixel circuits as provided in any of the foregoing embodiments of the first aspect of this application.

[0029] According to an embodiment of the second aspect of this 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. Each sub-pixel includes a pixel circuit and a 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 the plurality of pixel circuits and receives the first reference voltage signal through the main line.

[0030] According to an embodiment of the second aspect of this application, the sub-line includes a plurality of first traces extending along a first direction, one of which is electrically connected to a plurality of pixel circuits arranged along the first direction. The main line includes a first main line extending along a second direction, the first direction intersecting the second direction, and the first traces being electrically connected to the first main line.

[0031] According to an embodiment of the second aspect of this application, the sub-line further includes a plurality of second trace portions extending along a second direction, any two adjacent second trace portions being separated by a pixel circuit, and the second trace portions being electrically connected to the plurality of first trace portions.

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

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

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

[0035] According to an embodiment of the second aspect of this application, a display panel includes a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel, which are located in the display area of ​​the display panel. A sub-line includes a first sub-sub-line, a second sub-sub-line, and a third sub-sub-line. A main line includes a first sub-main line, a second sub-main line, and a third sub-main line. A 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 the pixel circuits of a plurality of first color sub-pixels in the display area, and 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 circuit 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 circuit 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 embodiment of the second aspect of this 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 embodiment of the second aspect of this application, the display module further includes a power supply module. 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 a first sub-main line, the second sub-reference voltage signal output terminal is electrically connected to a second sub-main line, and the third sub-reference voltage signal output terminal is electrically connected to a third sub-main line.

[0039] According to an embodiment of the second aspect of this application, the display panel includes a display area and a non-display area. The display area includes M partitions, each partition including at least one sub-pixel. The sub-pixel includes a pixel circuit and a light-emitting element, where M is an integer greater than 1. The display module includes M first reference voltage signal lines, each first reference voltage signal line corresponding to one partition, and each first reference voltage signal line 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 embodiment of the second aspect of this application, the display module further 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 M first reference voltage signal lines one by one.

[0041] According to an embodiment of the second aspect of this 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. The sub-pixels include pixel circuits and light-emitting elements. 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 embodiment of the second aspect of this application, the shunt branch includes a shunt switch module, the control terminal of the shunt switch module is electrically connected to the target control signal line, the first terminal of the shunt switch module is electrically connected to the first electrode of the light-emitting element, and the second terminal of the shunt switch module is electrically connected to the first reference voltage signal line.

[0043] According to an embodiment of the second aspect of this 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 embodiment of the second aspect of this application, when the target brightness of the display panel is greater than a first preset brightness threshold, the target control signal line transmits an enabled level.

[0045] According to an embodiment of the second aspect of this application, the target brightness of the display panel being less than or equal to a first preset brightness threshold includes: the brightness level of the display panel being less than or equal to a first brightness level threshold, and / or, the average gray level of a plurality of sub-pixels of the display panel in a frame of a display image being less than or equal to a second gray level threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is less than or equal to the first gray level threshold is greater than a first quantity threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is greater than the first gray level threshold is less than or equal to a second quantity threshold.

[0046] According to an embodiment of the second aspect of this 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 the 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 the second target voltage value; both the first target brightness and the second target brightness are 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 embodiment of the second aspect of this application, the first target brightness is less than the second target brightness, and the first target voltage value is less than the second target voltage value.

[0048] According to an embodiment of the second aspect of this 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 embodiment of the second aspect of this application, the target brightness of the display panel includes the average brightness of a plurality of sub-pixels in the display panel.

[0050] According to an embodiment of the second aspect of this application, the target brightness of the display panel being greater than a first preset brightness threshold includes: the brightness level of the display panel being greater than a first brightness level threshold, and / or, the average gray level of multiple sub-pixels of the display panel in a frame of a display image being greater than a second gray level threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is less than or equal to the first gray level threshold being less than or equal to a first quantity threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is greater than the first gray level threshold being greater than a second quantity threshold.

[0051] As described above, the pixel circuit and display module provided in this 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 shunt branch is electrically connected to the first electrode of the light-emitting element, and its second end 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 in this application shunt the driving current provided by the driving module through the shunt branch, which helps to increase the current flowing through the driving module. That is, it is equivalent to indirectly increasing the total current flowing through the driving module by shunting, thereby indirectly improving the "grayscale brightness" of the pixel circuit. In this way, after the grayscale brightness is increased due to shunting, the influence of the characteristic fluctuations of the electronic devices inside the pixel circuit on the current is 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 under low grayscale and low brightness and improving the image quality, thus helping to improve the problem of uneven display on the display panel. Attached Figure Description

[0052] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of a pixel circuit provided in an embodiment of this application;

[0054] Figure 2 This is a schematic diagram of another pixel circuit structure provided in an embodiment of this application;

[0055] Figure 3 This is a schematic diagram of another pixel circuit provided in the embodiments of this application;

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

[0057] Figure 5 This is a schematic diagram of another pixel circuit provided in an embodiment of this application;

[0058] Figure 6 This is a schematic diagram of another pixel circuit provided in the embodiments of this application;

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

[0060] Figure 8This is a schematic diagram of another pixel circuit provided in the embodiments of this application;

[0061] Figure 9 This is a schematic diagram of the structure of a display module provided in an embodiment of this application;

[0062] Figure 10 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0063] Figure 11 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0064] Figure 12 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application;

[0065] Figure 13 This is a schematic diagram of the structure of another display panel provided in the embodiments of this application. Detailed Implementation

[0066] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0068] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0069] It should be noted that the transistors in the embodiments of this application can be either N-type or P-type transistors. For N-type transistors, the on-state level is high and the off-state level is low. That is, when the gate of an N-type transistor is high, its first and second terminals are connected; when the gate of an N-type transistor is low, its first and second terminals are off. For P-type transistors, the on-state level is low and the off-state level is high. That is, when the control terminal of a P-type transistor is low, its first and second terminals are connected; when the control terminal of a P-type transistor is high, its first and second terminals are off. In specific implementations, the gate of each transistor is used as its control terminal. Furthermore, depending on the signal and type of the gate of each transistor, its first terminal can be used as the source and its second terminal as the drain, or vice versa. No distinction is made here. Additionally, the on-state and off-state levels in the embodiments of this invention are general terms. The on-state level refers to any level that enables the transistor to conduct, and the off-state level refers to any level that enables the transistor to turn off / become off.

[0070] In the embodiments of this application, the term "electrical connection" can refer to a direct electrical connection between two components, or it can refer to an electrical connection between two components via one or more other components.

[0071] In the embodiments of this application, the first node, the second node, and the third node are defined only 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] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0073] Before describing the technical solutions provided in the embodiments of this application, in order to facilitate understanding of the embodiments of this application, this application first specifically explains the problems existing in the related technologies:

[0074] As mentioned earlier, with the continuous development of display technology, the application range of OLED display products is becoming increasingly wide, and people's requirements for them are also getting higher and higher. However, the performance of current OLED display products needs to be improved. Specifically, the inventors of this application have discovered that there is a display defect when the light-emitting device displays low grayscale (low brightness).

[0075] Further research by the inventors of this application revealed that, due to continuous iterations and updates in OLED device material systems, device luminous efficiency is increasing, while the driving current of pixel circuits at the same grayscale brightness is decreasing. This leads to a greater impact of transistor characteristic fluctuations (such as electrical fluctuations, size fluctuations, or film thickness fluctuations) on low brightness and low grayscale levels, resulting in deteriorated display quality at these conditions. Therefore, improving display quality at low brightness and low grayscale levels is one of the urgent problems to be solved in current-controlled pixel driving circuits.

[0076] To address the aforementioned technical problems, embodiments of this application provide a pixel circuit and a display module. It should be noted that the embodiments provided in this application are not intended to limit the scope of this application.

[0077] The pixel circuit provided in the embodiments of this application will be described below. Please refer to... Figure 1 , Figure 1 This is a schematic diagram of a pixel circuit provided in an embodiment of this 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 can be the anode of the light-emitting element D, but this embodiment does not impose strict limitations on this.

[0079] The first end of the aforementioned 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] As described above, the pixel circuit 10 provided in this application 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 to the prior art, the pixel circuit 10 of this application embodiment divides the driving current provided by the driving module 101 through the shunt branch 11, so that 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. This is beneficial to make the current flowing through the driving module 101 larger, that is, it is equivalent to indirectly increasing the total current flowing through the driving module 101 by shunt.

[0082] In this way, the influence of the characteristic fluctuations of the electronic devices inside the pixel circuit 10 on the current is relatively reduced, 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 reading below. Figure 1 According to some embodiments of this application, and in consideration of actual application needs, in order to ensure the flexibility and controllability of current shunting in different display operating scenarios, the above-mentioned shunting branch 11 includes a shunting switch module 102.

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

[0085] The aforementioned 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 the enable level, the shunt switch module 102 is turned on, and part of the drive current provided by the drive module 101 is transmitted to the first reference voltage signal line Vref1.

[0086] As an example, the aforementioned drive module 101 may include a first transistor T1, and the aforementioned 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 terminal of the eighth transistor T8 is electrically connected to the anode of the aforementioned light-emitting element D, and the second terminal of the eighth transistor T8 is electrically connected to the aforementioned first reference voltage signal line Vref1. The signal provided by the target control signal line EN may be a pulse signal, and the high or low level (enable level and disable level) of the pulse signal controls the eighth transistor T8 to be turned on or off.

[0087] Please see below. Figure 2 , Figure 2This is a schematic diagram of another pixel circuit 10 provided in an embodiment of this application. Optionally, according to some embodiments of this application, the pixel circuit 10 may further include a first reset module 103.

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

[0089] The first reset module 103 described above 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 this application, more specifically, considering the specific pixel circuit operating timing, in order to more rationally realize the shunt function of the shunt switch module 102 and ensure the normal reset operation of the light-emitting element D by the first reset module 103, the shunt switch module 102 is turned on during the light-emitting stage of the light-emitting element D, and the first reset module 103 is turned on during the first reset stage. The first reset stage and the light-emitting stage do not overlap in time.

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

[0092] In the first reset phase, which does not overlap with the light-emitting phase, the first reset module 103 is turned on to perform a reset initialization operation on the light-emitting element D. During this first reset phase, the shunt switch module 102 remains off, effectively preventing current loss due to the connection of the first reference voltage signal line Vref1 during the reset of the light-emitting element D, thus helping to ensure the stable and reliable reset operation of the light-emitting element D.

[0093] Please continue reading Figure 2 According to some embodiments of this application, optionally, the second electrode of the light-emitting element D is electrically connected to the first power supply voltage signal line VSS. The power supply voltage signal provided by the first power supply voltage signal line VSS can be a fixed negative voltage signal, such as -5V. 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 required voltage value of the first reference voltage signal may differ under different brightness display scenarios, the first reference voltage signal transmitted by the first reference voltage signal line Vref1 can 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 can be flexibly varied according to the actual current distribution requirements under different display scenarios, and this embodiment does not impose specific limitations.

[0095] According to some embodiments of this application, optionally, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenarios, this 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 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 a first preset brightness threshold, the shunt switch module 102 is turned on under the control of the target control signal line EN. 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 practice, for example, before displaying a frame, it is usually necessary to obtain the image parameters of the image to be displayed (such as the grayscale value or brightness value), and then determine the actual brightness required for each pixel in the display panel based on the image parameters.

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

[0099] Conversely, if the brightness of the light-emitting element D connected to the pixel circuit 10 is detected to be greater than the first preset brightness threshold, it indicates that the display scene of the pixel circuit 10 is a high-brightness scene, and it may not be necessary to indirectly improve the "grayscale brightness" of the pixel circuit through the above-mentioned shunting process. In this case, the target control signal line EN outputs a cutoff level, causing the shunting switch module 102 to remain off in response to the enable level provided by the target control signal line EN.

[0100] It should be noted that the aforementioned first preset brightness threshold can be flexibly set based on factors such as the relevant personnel's experience in handling uneven display, actual display needs, or different panel characteristics. This application does not impose any specific restrictions on this.

[0101] According to some embodiments of this application, optionally, for reasons similar to those in the foregoing embodiments, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenarios, this embodiment, in order to effectively improve display quality while more fully reducing display power consumption, also proposes that: if the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to a first preset brightness threshold, the first reference voltage signal line can stop transmitting the first reference voltage signal, or transmit a first reference voltage signal with a voltage value lower than the first voltage threshold. The first voltage threshold can be flexibly set based on the experience of relevant personnel in handling uneven display, actual display needs, or different panel characteristics, etc., and this application does not impose specific limitations on it.

[0102] According to some embodiments of this application, more specifically, considering that the current shunting requirements for the current flowing through the driving module 101 may not be consistent under different brightness display scenarios, based on this, the signal value of the voltage signal of the first reference voltage signal line Vref1 can be adjusted to meet the various current shunting requirements under 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 a 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 a 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 a first preset brightness threshold, wherein the first brightness is different from the second brightness, and the first voltage value is different from the second voltage value.

[0104] Optionally, according to some embodiments of this application, in order to ensure that the screen brightness in different display brightness scenarios can reach the expected brightness, if the first brightness is less than the second brightness, the first voltage value is less than the second voltage value. That is, when the brightness is lower than or equal to the first preset brightness threshold, the lower the brightness, the lower the voltage value of the first reference voltage signal transmitted by the first reference voltage signal line Vref1.

[0105] Specifically, in this embodiment, the smaller the voltage value of the first reference voltage signal, the greater the shunting ratio of the current flowing through the driving module 101 by the aforementioned shunt branch 11, and the greater the increase in the total current flowing through the driving module 101. This is beneficial for more effectively achieving the purpose of indirectly improving the "grayscale brightness" of the pixel circuit in low grayscale and low brightness scenarios, thereby helping to fully improve the display quality and display effect of the display panel.

[0106] According to some embodiments of this application, optionally, in consideration of actual display scenarios, in order to more reasonably determine whether the brightness of the light-emitting element D connected to the 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 pixel circuit 10 being less than or equal to the first preset brightness threshold includes: 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 gray level of the light-emitting element D connected to the pixel circuit 10 is less than or equal to the first gray level threshold, and / or, the average gray level of multiple sub-pixels in a frame of a display image where the pixel circuit is located is less than or equal to a second gray level threshold, and / or, the number of sub-pixels in a frame of a display image where the pixel circuit is located has a gray level less than or equal to the first gray level threshold and is greater than a first quantity threshold, and / or, the number of sub-pixels in a frame of a display image where the pixel circuit is located has a gray level greater than the first gray level threshold and is less than or equal to the second quantity 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 being less than or equal to the first preset brightness threshold can include: the brightness level of the display panel where the pixel circuit 10 is located being less than or equal to the first brightness level threshold. Thus, by shunting current at low brightness levels, the problem of uneven display quality at low brightness levels can be improved.

[0109] And / or, the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to a 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 a first grayscale threshold. Thus, the aforementioned flow splitting operation is performed for low grayscale scenes at different brightness levels to improve the uneven display defects in low grayscale scenes.

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

[0111] And / or, the brightness of the light-emitting element D connected to the pixel circuit 10 is less than or equal to a first preset brightness threshold, which may include: the number of sub-pixels in a frame of a display image where the pixel circuit is located has a gray level less than or equal to the first gray level threshold greater than a first quantity threshold. Specifically, after acquiring a frame of a display image of the display panel, the gray level of each sub-pixel can be determined, and the number of sub-pixels with a gray level less than or equal to the first gray level threshold in the multiple sub-pixels in the image data can be counted. If the counted number is greater than the first quantity threshold, it can still be said that the overall gray level of the image data is too low. In this case, the problem of uneven display quality of low gray level images can be improved by shunting the driving current.

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

[0113] Furthermore, in some feasible embodiments, the current shunting operation can be initiated more specifically in low-brightness, low-grayscale scenarios by comprehensively considering at least two of the following: the brightness level of the display panel, the grayscale of the light-emitting element D connected to the pixel circuit 10, the average grayscale of multiple sub-pixels in a frame of the display panel, the number of sub-pixels in a frame of the display panel whose grayscale is less than or equal to a first grayscale threshold, and the number of sub-pixels in a frame of the display panel whose grayscale is greater than the first grayscale threshold. This further reduces the power consumption impact of the aforementioned current shunting operation while effectively ensuring the display quality of the display panel in low-brightness, low-grayscale scenarios.

[0114] According to some embodiments of this application, the brightness of the light-emitting element D connected to the pixel circuit 10 being greater than the first preset brightness threshold includes: the brightness level of the display panel where the pixel circuit 10 is located being greater than the first brightness level threshold; and / or, the gray level of the light-emitting element D connected to the pixel circuit 10 being greater than the first gray level threshold; and / or, the average gray level of multiple sub-pixels in a frame of the display panel being greater than the second gray level threshold; and / or, the number of sub-pixels in a frame of the display panel whose gray level is less than or equal to the first gray level threshold being less than or equal to the first quantity threshold; and / or, the number of sub-pixels in a frame of the display panel whose gray level is greater than the first gray level threshold being greater than the second quantity threshold.

[0115] It should be understood here that this embodiment relates to how to determine that the brightness of the light-emitting element D connected to the pixel circuit 10 is greater than the first preset brightness threshold. This corresponds to the implementation principle and 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 previous embodiment. For the sake of brevity, this embodiment will not be described in detail here.

[0116] Furthermore, the specific values ​​of the first brightness level threshold, the first grayscale threshold, the second grayscale threshold, the first quantity threshold, and the second quantity threshold can be flexibly set based on the relevant personnel's experience in handling uneven display, actual display needs, or different panel characteristics, etc., and this application does not impose specific restrictions on them.

[0117] Please see below. Figure 3 , Figure 3 This is a schematic diagram of another pixel circuit 10 provided in an embodiment of this application. For example... Figure 3 As shown, according to some embodiments of this application, optionally, in order to more reasonably realize the shunting operation of the drive current provided by the drive module 101 based on the above-mentioned shunting branch 11, the above-mentioned shunting branch 11 may also include a voltage divider module 104.

[0118] In a specific connection, the voltage divider module 104 is electrically connected between the first terminal of the shunt switch module 102 and the first electrode of the light-emitting element D. Figure 3 (as shown in the example), and / or, the voltage divider module 104 is electrically connected between the second terminal of the shunt switch module 102 and the first reference voltage signal line Vref1.

[0119] In this embodiment, by setting the voltage divider module 104 in the shunt branch 11 to perform voltage division, it is possible to 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 this application, more specifically, the voltage divider module 104 described above includes a resistor. The impedance of the resistor can be a fixed value, and the resistor can be, for example, a semiconductor resistor, etc., without strict limitation.

[0121] In this embodiment, the smaller the resistance of the resistor, the greater the shunting ratio of the drive current provided by the drive module 101 to the shunt branch 11, which is more conducive to indirectly increasing the total current flowing through the drive module 101 during actual drive 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 will help the brightness of the light-emitting element driven by the pixel circuit to reach the expected brightness, thereby improving the problem of uneven display.

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

[0124] Please see below. Figure 4 , Figure 4 This is a schematic diagram of the structure between the first reference voltage signal line Vref1 and the power module 200 provided in an embodiment of this application. Figure 4 As shown, according to some embodiments of this 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 can be, for example, a display driver chip, etc., and is not limited thereto.

[0125] In this embodiment, when the display panel is in operation, the first reference voltage signal line Vref1 is controlled by the power supply module 200. When it is detected that current needs to be shunted through the first reference voltage signal line Vref1, the power supply module 200 provides a first reference voltage signal with a corresponding voltage value to the first reference voltage signal line Vref1.

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

[0127] Please see below. Figure 5 , Figure 5This is a schematic diagram of another pixel circuit 10 provided in an embodiment of this application. For example... Figure 5 As shown, according to some embodiments of this application, optionally, the control terminal of the drive module 101 is electrically connected to the first node N1, the first terminal of the drive module 101 is electrically connected to the second node N2, and the second terminal of the drive module 101 is electrically connected to the third node N3.

[0128] The pixel circuit 10 described above also 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] In specific connection, the control terminal of the first light-emitting control module 105 is electrically connected to the light-emitting control signal line EM, the first terminal of the first light-emitting control module 105 is electrically connected to the second power supply voltage signal line VDD, and the second terminal 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 terminal of the second light-emitting control module 106 is electrically connected to the light-emitting control signal line EM, the first terminal of the second light-emitting control module 106 is electrically connected to the third node N3, and the second terminal 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 this light-emitting control signal line EM, so that the light-emitting element D emits light.

[0132] Please continue reading Figure 5 According to some embodiments of this application, optionally, in order to achieve reasonable reuse of signal lines in the display panel to save wiring space and wiring costs, the target control signal line EN can specifically reuse the light emission 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 emission control signal line EM can also be two different signal lines.

[0133] In this embodiment, the control terminals 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 aforementioned light-emitting control signal line EM. During the light-emitting phase of the light-emitting element D, the light-emitting control signal line EM transmits the provided conduction level to the control terminals 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 during the light-emitting phase. Thus, by using the light-emitting control signal line EM as the aforementioned 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 drive module 101 while the light-emitting element D is emitting light normally.

[0134] According to some embodiments of this application, optionally, the target control signal line EN is electrically connected to the control terminal of the shunt switch module 102 of at least two rows of pixel circuits 10, and each row of pixel circuits 10 includes multiple pixel circuits 10 arranged along the row direction. That is, the control terminal of the shunt switch module 102 in multiple rows of pixel circuits 10 can be electrically connected to the same target control line EN.

[0135] According to some embodiments of this application, optionally, to effectively reduce shunt power consumption in high-brightness scenarios, if the target control signal line EN and the light emission control signal line EM are two different signal lines, when the brightness of the light emission element D connected to the pixel circuit 10 is greater than a 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 floating state. And / or, if the target control signal line EN and the light emission control signal line EM are two different signal lines, when the brightness of the light emission 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] Please see below. Figure 6 , Figure 6 This is a schematic diagram of another pixel circuit 10 provided in an embodiment of this application. For example... Figure 6 As shown, according to some embodiments of this application, optionally, the pixel circuit 10 further includes a data writing module 107, a threshold compensation module 108, a second reset module 109, and a storage module 110. The specific structures of each of the above modules will be described in detail below.

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

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

[0139] The control terminal of the second reset module 109 is electrically connected to the fourth scan signal line S4, the first terminal of the second reset module 109 is electrically connected to the first node N1, and the second terminal 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 conduct under the control of the fourth scan signal line S4, transmit the third reference voltage signal of the third reference voltage signal line Vref3 to the first node N1, and reset the first node N1.

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

[0141] To facilitate understanding of the pixel circuit 10 provided in this application, the following description is provided in conjunction with some specific application embodiments. Continuing with... 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. Furthermore, to reduce the impact of leakage current, both the third transistor T3 and the fourth transistor T4 may be IGZO (Indium Gallium Zinc Oxide) transistors; this application does not impose specific limitations on this.

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

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

[0144] During the initialization phase t1, the first transistor T1 can be turned on under the control of the first scan signal line S1, transmitting 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. The fourth transistor T4 can be turned on under the control of the fourth scan signal line S4, transmitting the third reference voltage signal of the third reference voltage signal line Vref3 to the first node N1, thereby resetting the first node N1.

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

[0146] During 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. 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 this embodiment differs from conventional pixel circuits in that: Figure 7 The pixel circuit 10 shown includes an eighth transistor T8. The gate of the eighth transistor T8 is electrically connected to the target control signal line EN, the first terminal of the eighth transistor T8 is electrically connected to the anode of the light-emitting element D, and the second terminal of the eighth transistor T8 is electrically connected to the first reference voltage signal line Vref1.

[0148] exist Figure 7 During the light-emitting stage, the signal provided by the target control signal line EN is at the enable level. The eighth transistor T8 is turned on under the control of the target control signal line EN, and transmits 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 will not be elaborated in detail in this embodiment.

[0150] It is understood that the driving timing given in the embodiments of this application is only one possible example. In other embodiments, the operating timing of the above-mentioned pixel circuit can be flexibly adjusted according to the actual situation and needs. This application does not impose specific limitations on it here.

[0151] Please see below. Figure 8 , Figure 8 This is a schematic diagram of another pixel circuit 10 provided in an embodiment of this application. For example... Figure 8As shown, according to some embodiments of this application, optionally, to further improve the display effect of the display panel, the pixel circuit 10 further includes a bias adjustment module 111. The control terminal of the bias adjustment module 111 is electrically connected to the fifth scan signal line S5, the first terminal of the bias adjustment module 111 is electrically connected to the bias voltage signal line VEH, and the second terminal 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 may specifically include the ninth transistor T9. The fifth scan signal line S5 can reuse the aforementioned 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] Understandably, for reasons similar to those in the foregoing embodiments, and considering the widespread application of the 8T1C basic pixel structure in the panel industry, for the sake of brevity, this embodiment will not describe it further. Figure 8 The specific working process of other components in the pixel circuit shown is not described in detail.

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

[0154] Based on the pixel circuits provided in the above embodiments, this application provides a display module, which includes a display panel. The display panel includes the pixel circuits provided in any of the foregoing embodiments of this application. The display panel provided in this application can be AMOLED, OLED, or others. Those skilled in the art should understand that in other implementations of this 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. Figure 9 , Figure 9 This is a schematic diagram of the structure of a display module provided in an embodiment of this application. Figure 9 As shown, the display module 1000 provided in this application embodiment may include the display panel 100 described in any of the above embodiments, and the display panel 100 includes the pixel circuit as described in any of the above embodiments. The display module 1000 provided in this application embodiment has the beneficial effects of the pixel circuit provided in this application embodiment. For details, please refer to the specific description of the pixel circuit in the above embodiments, which will not be repeated here.

[0156] Please see below. Figure 10 , Figure 10This is a schematic diagram of the structure of a display panel 100 provided in an embodiment of this application. Figure 10 As shown, the display panel 100 includes a display area AA and a non-display area NA. The display area AA is used to display images, while the non-display area NA is used for routing, etc. The display area AA includes a plurality of sub-pixels 20 arranged in an array, and each sub-pixel 20 includes pixel circuitry and light-emitting elements as described in any of the preceding embodiments.

[0157] In this embodiment, the aforementioned first reference voltage signal line may specifically include a secondary line S1 located in the display area AA and a main line S2 located in the non-display area NA. The secondary line S1 is electrically connected to multiple pixel circuits, and it can receive the first reference voltage signal through the main line S2. It is worth noting that... Figure 10 The thickness of the lines in the following diagrams is only for better distinguishing various traces and is not intended to limit the actual width of the aforementioned traces.

[0158] Please continue reading Figure 10 According to some embodiments of this application, more specifically, in Figure 10 In the example shown, the secondary line S1 may include multiple first traces S11 extending along the first direction X, and each first trace S11 is electrically connected to multiple pixel circuits arranged along the first direction X. The main line S2 includes a first main line S21 extending along the second direction Y. The first direction X intersects the second direction Y, and the first traces S11 are electrically connected to the first main line S21. The number of the aforementioned first main lines S21 can be one, or it can be as follows: Figure 10 The two lines shown are positioned on opposite side borders, but this application does not impose strict limitations on them.

[0159] It should be noted that, Figure 10 The example shown uses the first direction X as the row direction and the second direction Y as the column direction for illustration, but it is not limited to this.

[0160] For some feasible implementation methods, please refer to Figure 11 , Figure 11 This is a schematic diagram of the structure of a display panel 100 provided in an embodiment of this application. Figure 11 As shown, the first direction X is the column direction, and the second direction Y is the row direction. In this case, the aforementioned sub-line S1 may include multiple first traces S11 extending along the first direction X (column direction), and each first trace S11 is electrically connected to multiple 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 the second direction Y, and the first traces S11 are electrically connected to the first main line S21.

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

[0162] Please see below. Figure 12 , Figure 12 This is a schematic diagram of the structure of a display panel 100 provided in an embodiment of this application. Figure 12 As shown, according to some embodiments of this application, optionally, in addition to the multiple first traces S11 extending along the first direction X, the sub-line S1 may also include multiple second traces S12 extending along the second direction Y. Any two adjacent second traces S12 are separated by pixel circuits, and the second traces S12 are electrically connected to the multiple first traces S11.

[0163] Please continue reading Figure 12 According to some embodiments of this application, optionally, in addition to the first main line S21 extending along the second direction Y, the main line S2 may also include a second main line S22 extending along the first direction X, and the first main line S21 and a plurality of second wiring portions S12 are electrically connected to the second main line S22.

[0164] In this embodiment, by setting such in the display panel Figure 12 The multiple first traces S11, multiple second traces S12, first main line S21, and second main line S22 in the structure shown are used to set the first reference voltage signal line into a mesh, thereby effectively improving the driving capability of the first reference voltage signal line, which is beneficial to enhancing the current shunting capability of the pixel circuit, and thus more fully improving the image quality of the display panel.

[0165] Please continue reading Figure 10 , Figure 11 or Figure 12 According to some embodiments of this application, optionally, in conjunction with the actual display module structure, in order to more reasonably realize the output of the first reference voltage signal, the display module 1000 further includes a power supply module. Figure 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 via the main line S2, thereby receiving the first reference voltage signal provided by the first reference voltage signal output terminal D1.

[0166] More specifically, the power module may include a display driver integrated circuit (DDIC) or a power management integrated circuit (PMIC). The choice between the display driver chip and the power management integrated circuit depends on the specific requirements of the application scenario and the characteristics of the chip; this embodiment does not impose any restrictions on this.

[0167] Please see below. Figure 13 , Figure 13 This is a schematic diagram of the structure of a display panel 100 provided in an embodiment of this application. Figure 13 As shown, according to some embodiments of this 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, which are located in the display area AA of the display panel 100.

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

[0169] The aforementioned 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 circuit of a plurality of first color sub-pixels P1 in the display area AA, and the first sub-sub-line S101 receives the aforementioned first sub-reference voltage signal through the first sub-main line S201.

[0170] The second sub-line S102 is electrically connected to the pixel circuit of multiple second-color sub-pixels P2 in the display area, and 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 circuit of multiple third-color sub-pixels P3 in the display area AA, and 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 can be the same or different. This application does not impose strict restrictions on this. Specifically, they can be set according to the light emission characteristics of different color sub-pixels and the current splitting requirements.

[0172] In this embodiment, the 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 according to the different colors of the sub-pixels in the display area AA. This forms 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 facilitates fine control over the degree of current distribution of different color sub-pixels, which in turn helps to ensure that the brightness of the light-emitting elements in each sub-pixel of the display panel reaches the expected brightness, thus further improving the problem of uneven display of the display panel.

[0173] According to some embodiments of this 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 other embodiments, the first color sub-pixel P1 may also be a green sub-pixel or a blue sub-pixel, etc., and this embodiment does not specifically limit this.

[0174] Continue as Figure 13 As shown, according to some embodiments of this application, optionally, in conjunction 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 display module 1000 may also include a power supply module.

[0175] like Figure 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-sub-line S101 is electrically connected to the pixel circuit of the plurality of first color sub-pixels P1 in the display area AA, and the first sub-sub-line S101 is electrically connected to the first sub-reference voltage signal output terminal D11 through the first sub-main line S201.

[0177] The aforementioned second sub-sub-line S102 is electrically connected to the pixel circuit of multiple second color sub-pixels P2 in the display area AA, and the second sub-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 aforementioned third sub-sub-line S103 is electrically connected to the pixel circuit of multiple third color sub-pixels P3 in the display area AA, and the third sub-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, thereby forming three sets of mesh traces 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 traces corresponding to different color sub-pixels 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 means that if the voltage signal values ​​output from 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, then the voltage value of the first reference voltage signal used to shunt current to different color sub-pixels can also be different. This allows for precise control of the current in different color sub-pixels, making it easier to ensure that the brightness of the light-emitting elements in each sub-pixel of the display panel reaches the expected brightness, thus further improving the problem of uneven display on the display panel.

[0181] According to some embodiments of this application, optionally, considering the partitioned display scenario of the display panel, the brightness display 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 aforementioned display panel 100 includes a display area AA and a non-display area NA. The display area AA includes M partitions, and each partition includes at least one sub-pixel 20. The sub-pixel 20 includes a pixel circuit and a light-emitting element, where M is an integer greater than 1.

[0182] The aforementioned display module 1000 includes M first reference voltage signal lines, each first reference voltage signal line corresponding to a partition, and each first reference voltage signal line being 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 may be the same or different.

[0183] More specifically, the display module 1000 may further include a power supply module. The power supply 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 M first reference voltage signal lines in a one-to-one correspondence.

[0184] In this embodiment, the display area AA is divided into multiple zones. Each zone's pixel circuit is connected to a corresponding first reference voltage signal line, and each first reference voltage signal line is electrically connected to its corresponding first reference voltage signal output terminal D1. Thus, by using different first reference voltage signal lines and their corresponding first reference voltage signal output terminals D1, different first reference voltage values ​​can be provided to different zones. This allows for precise current control of the pixel circuits in different zones, ensuring that the brightness of the light-emitting elements in each zone of the display panel reaches the desired brightness for each zone, thereby improving the problem of uneven display.

[0185] According to some embodiments of this application, optionally, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenarios, this application makes targeted settings for the transmission scenario of the 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. A plurality of sub-pixels 20 arranged in an array are located in the display area AA. Each sub-pixel 20 includes a pixel circuit and a light-emitting element. When the target brightness of the display panel 100 is less than or equal to a first preset brightness threshold, a first reference voltage signal is transmitted to the first reference voltage signal line through the first reference voltage signal output terminal D1.

[0187] In practice, for example, before displaying a frame, it is usually necessary to acquire the image data of the image to be displayed on the display panel. After acquiring the image data, the target brightness of the display panel can be determined based on the image data, so as to decide whether to transmit the first reference voltage signal to the first reference voltage signal line through the first reference voltage signal output terminal D1 based on the target brightness.

[0188] More specifically, the target brightness of the display panel 100 includes the average brightness of a plurality of sub-pixels 20 in the display panel 100, that is, the target brightness can be the average value of the brightness of a plurality of sub-pixels in the display panel 100. However, it should be understood that the above method of determining the target brightness is only one possible example and should not be construed as a substantial limitation on the target brightness in this application.

[0189] According to some embodiments of this application, optionally, in order to facilitate reasonable current shunting control of the pixel circuit in each sub-pixel, the current shunting branch in the pixel circuit includes a current shunting switch module, the control terminal of the current shunting switch module is electrically connected to the target control signal line, the first terminal of the current shunting switch module is electrically connected to the first electrode of the light-emitting element, the second terminal of the current shunting 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 this 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 under scenarios such as low grayscale and low brightness, thereby effectively improving the display quality of the display panel.

[0191] According to some embodiments of this application, when the target brightness of the display panel 100 is greater than a first preset brightness threshold, an enable level is transmitted to the target control signal line so that the corresponding shunt switch module remains cut off, thereby stopping the shunt operation of 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 this application, optionally, the target brightness of the display panel 100 being less than or equal to a first preset brightness threshold includes: the brightness level of the display panel 100 being less than or equal to a first brightness level threshold, and / or, the average gray level of a plurality of sub-pixels 20 in a frame of the display panel 100 being less than or equal to a second gray level threshold, and / or, the number of sub-pixels 20 in a frame of the display panel 100 whose gray level is less than or equal to the first gray level threshold being greater than a first quantity threshold, and / or, the number of sub-pixels 20 in a frame of the display panel 100 whose gray level is greater than the first gray level threshold being less than or equal to a second quantity threshold.

[0193] It should be added that the grayscale of the subpixels in the aforementioned display panel 100 can refer to the grayscale of the corresponding subpixels in a frame of the displayed image on the display panel. Furthermore, it should be understood that, for the sake of brevity, the specific implementation process of some of the above embodiments can be referred to the corresponding descriptions above, and will not be repeated here.

[0194] According to some embodiments of this application, optionally, considering that uneven display of the display panel is more likely to occur in low grayscale and low brightness scenarios, this embodiment, in order to effectively improve display quality while more fully reducing display power consumption, 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 floating state. And / or, if the target control signal line and the light emission 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 this application, the target brightness of the display panel being greater than a first preset brightness threshold includes: the brightness level of the display panel being greater than a first brightness level threshold, and / or, the average gray level of multiple sub-pixels of the display panel in a frame of a display image being greater than a second gray level threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is less than or equal to the first gray level threshold being less than or equal to a first quantity threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is greater than the first gray level threshold being greater than a second quantity threshold.

[0196] According to some embodiments of this application, optionally, and more specifically, considering that the shunting requirements for the sub-pixel driving current may not be consistent under different brightness display scenarios, based on this, the first reference voltage signal transmitted by the first reference voltage signal line can be set to be different to meet the various shunting requirements under 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 the first reference voltage signal of the first target voltage value; when the target brightness of the display panel is the second target brightness, the first reference voltage signal line transmits the first reference voltage signal of the second target voltage value; both the first target brightness and the second target brightness are 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.

[0198] According to some embodiments of this application, optionally, in order to ensure that the screen brightness in different display brightness scenarios can reach the expected brightness, 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 smaller, and the degree of current shunting is higher. In this way, the image quality improvement effect brought about by current shunting will be more obvious, which is more conducive to effectively improving the "grayscale brightness" of the pixel circuit in the display panel in low grayscale and low brightness scenarios, thereby helping to fully improve the display quality and display effect of the display panel.

[0200] It is understood that the display module provided in the embodiments of this application can be installed on a display device, which can be a wearable product, computer, television, vehicle display device, or other display device with display function. This application does not impose specific limitations on this. The display device provided in the embodiments of this application has the beneficial effects of the pixel circuit / display panel provided in the foregoing embodiments of this application. For details, please refer to the specific descriptions of the pixel circuit / display panel in the above embodiments. These descriptions will not be repeated here.

[0201] It should be understood that the specific circuit structures and cross-sectional structures of the display panels provided in the accompanying drawings of the embodiments of this application are merely examples and are not intended to limit this application. Furthermore, the above embodiments provided in this application can be combined with each other unless there is contradiction.

[0202] It should be clarified that the various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. According to the embodiments described above, these embodiments do not exhaustively describe all details, nor do they limit this application to only the specific embodiments described. Obviously, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to make good use of this application and modifications based on it. This application is limited only by the claims and their full scope and equivalents.

[0203] Those skilled in the art will understand that the above embodiments are exemplary and not restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specification, and 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 refers to "one" but does not exclude multiple; the terms "first" and "second" are used to identify names and not to indicate any particular order. Any reference numerals in the claims should not be construed 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 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. The shunt branch has a first end electrically connected to the first electrode of the light-emitting element and a second end electrically connected to the first reference voltage signal line. The shunt branch is used to transmit part of the driving current provided by the driving module to the first reference voltage signal line. The first reference voltage signal transmitted by the first reference voltage signal line is a voltage signal with a variable voltage value; The shunt branch includes a shunt switch module. The control terminal of the shunt switch module is electrically connected to the target control signal line. The first terminal of the shunt switch module is electrically connected to the first electrode of the light-emitting element. The second terminal 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. 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; 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 with a first voltage value; When the brightness of the light-emitting element connected to the pixel circuit is the second brightness, the first reference voltage signal line transmits a first reference voltage signal with 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; The first brightness is less than the second brightness, and the first voltage value is less than the second voltage value; Wherein, when the brightness of the light-emitting element connected to the pixel circuit is less than or equal to the first preset brightness threshold, the signal provided by the target control signal line is a pulse signal, and the target control signal line is used to provide a non-enable level in the non-light-emitting stage and an enable level in the light-emitting stage. The shunt switch module is turned on in the light-emitting stage and turned off in the non-light-emitting stage. The shunt branch further includes a voltage divider module, which is electrically connected between the first terminal 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 terminal of the shunt switch module and the first reference voltage signal line, wherein the impedance of the voltage divider module is less than or equal to the impedance of the light-emitting element; The first reference voltage signal line is electrically connected to the first reference voltage signal output terminal of the power module; At least two of the pixel circuits' shunt branches are electrically connected to the first reference voltage signal output terminal via the same first reference voltage signal line; The target control signal line is multiplexed with the light emission control signal line. When the brightness of the light emission 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. Alternatively, the target control signal line and the light emission control signal line are two different signal lines, and when the brightness of the light emission element connected to the pixel circuit is less than or equal to the first preset brightness threshold, the pulse signal provided by the target control signal line is synchronized with the signal provided by the light emission control signal line; when the brightness of the light emission element connected to the pixel circuit is greater than the first preset brightness threshold, the shunt switch module is turned off under the control of the target control signal line.

2. The pixel circuit according to claim 1, characterized in that, The pixel circuit further includes a first reset module. The control terminal of the first reset module is electrically connected to the first scan signal line. The first terminal of the first reset module is electrically connected to the first electrode of the light-emitting element. The second terminal of the first reset module is electrically connected to the second reference voltage signal line. The first reset module is used to conduct 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.

3. The pixel circuit according to claim 2, characterized in that, The shunt switch module is turned on during the light-emitting phase of the light-emitting element, and the first reset module is turned on during the first reset phase. The first reset phase and the light-emitting phase do not overlap in time.

4. The pixel circuit according to claim 1, characterized in that, 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.

5. The pixel circuit according to claim 1, characterized in that, The brightness of the light-emitting element connected to the pixel circuit being less than or equal to a first preset brightness threshold includes: the brightness level of the display panel where the pixel circuit is located being less than or equal to a first brightness level threshold, and / or, the grayscale of the light-emitting element connected to the pixel circuit being less than or equal to a first grayscale threshold, and / or, the average grayscale of multiple sub-pixels in a frame of a display image where the pixel circuit is located being less than or equal to a second grayscale threshold, and / or, the number of sub-pixels in a frame of a display image where the grayscale of the pixel circuit is located being less than or equal to the first grayscale threshold being greater than a first quantity threshold, and / or, the number of sub-pixels in a frame of a display image where the grayscale of the pixel circuit is located being greater than the first grayscale threshold being less than or equal to a second quantity threshold.

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

7. The pixel circuit according to claim 6, characterized in that, The voltage divider module includes resistors.

8. The pixel circuit according to claim 1, characterized in that, The control terminal of the drive module is electrically connected to the first node, the first terminal of the drive module is electrically connected to the second node, and the second terminal of the drive 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 terminal of the first light-emitting control module is electrically connected to the light-emitting control signal line, the first terminal of the first light-emitting control module is electrically connected to the second power supply voltage signal line, and the second terminal of the first light-emitting control module is electrically connected to the second node. The control terminal of the second light-emitting control module is electrically connected to the light-emitting control signal line, the first terminal of the second light-emitting control module is electrically connected to the third node, and the second terminal of the second light-emitting control module is electrically connected to the first electrode of the light-emitting element.

9. The pixel circuit according to claim 1, characterized in that, The target control signal line is electrically connected to the control terminal 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.

10. The pixel circuit according to claim 8, characterized in that, The pixel circuit also includes: The data writing module has a control terminal electrically connected to the second scan signal line, a first terminal electrically connected to the data signal line, and a second terminal electrically connected to the second node. A threshold compensation module, wherein the control terminal of the threshold compensation module is electrically connected to the third scan signal line, the first terminal of the threshold compensation module is electrically connected to the first node, and the second terminal of the threshold compensation module is electrically connected to the third node; The second reset module has a control terminal electrically connected to the fourth scan signal line, a first terminal electrically connected to the first node, and a second terminal electrically connected to the third reference voltage signal line. The second reset module is used to be turned on under the control of the fourth scan signal line to transmit the third reference voltage signal of the third reference voltage signal line to the first node and reset the first node. The storage module has a first end electrically connected to the second power supply voltage signal line and a second end electrically connected to the first node.

11. The pixel circuit according to claim 10, characterized in that, The pixel circuit also includes: The bias adjustment module has its control terminal electrically connected to the fifth scan signal line, its first terminal electrically connected to the bias voltage signal line, and its second terminal electrically connected to either the second node or the third node.

12. A display module, characterized in that, The display module includes a display panel, and the display panel includes pixel circuitry as described in any one of claims 1 to 11; The shunt branch includes a shunt switch module, the control terminal of the shunt switch module is electrically connected to the target control signal line, the first terminal of the shunt switch module is electrically connected to the first electrode of the light-emitting element, and the second terminal of the shunt switch module is electrically connected to the first reference voltage signal line. The display panel includes a display area and a non-display area, and a plurality of sub-pixels arranged in an array are located in the display area. Each sub-pixel includes the pixel circuit and the light-emitting element. The first reference voltage signal transmitted by the first reference voltage signal line is a voltage signal with a variable voltage value; 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; 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 the 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 the second target voltage value; Both the first target brightness and the second target brightness are 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; The first target brightness is less than the second target brightness, and the first target voltage value is less than the second target voltage value; Wherein, when the brightness of the light-emitting element connected to the pixel circuit is less than or equal to the first preset brightness threshold, the signal provided by the target control signal line is a pulse signal, and the target control signal line is used to provide a non-enable level in the non-light-emitting stage and an enable level in the light-emitting stage. The shunt switch module is turned on in the light-emitting stage and turned off in the non-light-emitting stage. The shunt branch further includes a voltage divider module, which is electrically connected between the first terminal 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 terminal of the shunt switch module and the first reference voltage signal line, wherein the impedance of the voltage divider module is less than or equal to the impedance of the light-emitting element; The first reference voltage signal line is electrically connected to the first reference voltage signal output terminal of the power module; At least two of the pixel circuits' shunt branches are electrically connected to the first reference voltage signal output terminal via the same first reference voltage signal line; The target control signal line reuses the light emission control signal line. When the brightness of the light emission 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. Alternatively, the target control signal line and the light emission control signal line are two different signal lines, and when the brightness of the light emission element connected to the pixel circuit is less than or equal to the first preset brightness threshold, the pulse signal provided by the target control signal line is synchronized with the signal provided by the light emission control signal line; when the brightness of the light emission element connected to the pixel circuit is greater than the first preset brightness threshold, the shunt switch module is turned off under the control of the target control signal line.

13. The display module according to claim 12, 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. Each sub-pixel includes 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 pixel circuits and receives the first reference voltage signal through the main line.

14. The display module according to claim 13, characterized in that, The secondary line includes multiple first traces extending along a first direction, one of which is electrically connected to multiple pixel circuits arranged along the first direction. The main line includes a first main line extending along a second direction, the first direction intersecting the second direction, and the first trace is electrically connected to the first main line.

15. The display module according to claim 14, characterized in that, The sub-line also includes multiple second traces extending along the second direction, any two adjacent second traces are separated by the pixel circuit, and the second traces are electrically connected to the multiple first traces.

16. The display module according to claim 15, characterized in that, The main line also includes a second main line extending along a first direction, and the first main line and a plurality of second wiring sections are electrically connected to the second main line.

17. The display module according to claim 14, characterized in that, The display module also includes a power supply module, the first reference voltage signal output terminal of which is electrically connected to the main line.

18. The display module according to claim 17, characterized in that, The power module includes a display driver chip or a power chip.

19. The display module according to claim 14, characterized in that, 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 being located in the 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; and 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 the pixel circuit 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 circuit 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-main line; The third sub-line is electrically connected to the pixel circuit 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-main line.

20. The display module according to claim 19, characterized in that, 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.

21. The display module according to claim 19, characterized in that, The display module further includes a power module. The first reference voltage signal output terminal of the power 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.

22. The display module according to claim 12, characterized in that, The display panel includes a display area and a non-display area. The display area includes M partitions. Each partition includes at least one sub-pixel. The sub-pixel includes the pixel circuit and the light-emitting element. 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.

23. The display module according to claim 22, characterized in that, The display module further 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 M first reference voltage signal lines in a one-to-one correspondence.

24. The display module according to claim 12, characterized in that, When the target brightness of the display panel is greater than the first preset brightness threshold, the target control signal line transmits an inactive level.

25. The display module according to claim 12, characterized in that, The target brightness of the display panel being less than or equal to a first preset brightness threshold includes: the brightness level of the display panel being less than or equal to a first brightness level threshold, and / or, the average grayscale value of a plurality of sub-pixels of the display panel in a frame of a display image being less than or equal to a second grayscale threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose grayscale value is less than or equal to the first grayscale threshold being greater than a first quantity threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose grayscale value is greater than the first grayscale threshold being less than or equal to a second quantity threshold.

26. The display module according to claim 12, 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.

27. The display module according to claim 12, characterized in that, The target brightness of the display panel includes the average brightness of the plurality of sub-pixels in the display panel.

28. The display module according to claim 12, characterized in that, The target brightness of the display panel being greater than a first preset brightness threshold includes: the brightness level of the display panel being greater than a first brightness level threshold, and / or, the average gray level of multiple sub-pixels of the display panel in a frame of a display image being greater than a second gray level threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is less than or equal to the first gray level threshold being less than or equal to a first quantity threshold, and / or, the number of sub-pixels of the display panel in a frame of a display image whose gray level is greater than the first gray level threshold being greater than a second quantity threshold.

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