Pixel circuit and display device

Abstract

The present application provides a pixel circuit and a display device, comprising: a plurality of pixel driving modules, the pixel driving module comprising: a main pixel control group, comprising a main switch and a main pixel electrode, the main switch is configured to be controlled by a scanning signal of a current level scanning line to transmit a data signal of a data line to the main pixel electrode; a secondary pixel control group, comprising a secondary switch and a secondary pixel electrode, the secondary switch is configured to be controlled by a scanning signal of the current level scanning line to transmit a data signal of the data line to the secondary pixel electrode; and a shared switch configured to be controlled by a shared scanning signal of a shared scanning line to lower the potential of the secondary pixel electrode. Thus, the low color distortion curve adjustable range of the prior art is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a pixel circuit and a display device. Background Technology

[0002] In liquid crystal display devices, to improve the large viewing angle color shift phenomenon of vertically aligned liquid crystal displays, low color shift (LCS) design can be implemented for pixel units. For example, each sub-pixel unit can be divided into a main pixel electrode and a sub-pixel electrode. During the display process, the main pixel electrode and the sub-pixel electrode are first charged to the same potential, and then the potential of the sub-pixel electrode is pulled down, so that the potentials of the main pixel electrode and the sub-pixel electrode are different.

[0003] For example, when the switching of the main pixel electrode, the sub-pixel electrode, and the sharing signal switch are controlled by the same signal line, the LCS curve will show a downward trend. When the LCS characteristic parameter is low, the viewing angle is poor, and when the LCS characteristic parameter is high, the penetration is poor. To improve this situation, although other technologies have been proposed, such as changing the control method of the sharing signal switch, the adjustable range of the LCS characteristic curve is limited, and it cannot simultaneously meet the requirements of viewing angle and penetration rate, so further improvement is needed. Summary of the Invention

[0004] The present invention provides a pixel circuit and a display device for improving the adjustable range of the low color deviation curve in the prior art.

[0005] To address the aforementioned problems, a first aspect of the present invention provides a pixel circuit, comprising: a plurality of pixel driving modules, each pixel driving module comprising: a main pixel control group, including a main switch and a main pixel electrode, the main switch being configured to be controlled by a scan signal of a primary scan line to transmit a data signal of a data line to the main pixel electrode; a secondary pixel control group, including a secondary switch and a secondary pixel electrode, the secondary switch being configured to be controlled by a scan signal of the primary scan line to transmit the data signal of the data line to the secondary pixel electrode; and a shared switch, configured to be controlled by a shared scan signal of a shared scan line to lower the potential of the secondary pixel electrode.

[0006] According to an embodiment of the present invention, the main switch, the secondary switch, and the shared switch are each transistor switches. The transistor switch includes a control terminal, a first terminal, and a second terminal. The control terminals of the main switch and the secondary switch are electrically connected to the scan line, and the control terminal of the shared switch is electrically connected to the shared scan line.

[0007] According to one embodiment of the present invention, the first terminal of the shared switch is electrically connected to the sub-pixel electrode and the second terminal of the sub-switch, and the second terminal of the shared switch is electrically connected to a common electrode.

[0008] According to an embodiment of the present invention, the main pixel electrode and the secondary pixel electrode each include a liquid crystal capacitor and a storage capacitor. The liquid crystal capacitor of the secondary pixel electrode is electrically connected to the second terminal of the secondary switch and a first common electrode. The storage capacitor of the secondary pixel electrode is electrically connected to the second terminal of the secondary switch and a second common electrode. The second terminal of the shared switch is electrically connected to the second common electrode.

[0009] According to one embodiment of the present invention, the local scan line and the shared scan line are mutually insulated.

[0010] According to one embodiment of the present invention, the local scan line and the shared scan line are disposed on two metal material layers, and an insulating layer is disposed between the two metal material layers.

[0011] According to one embodiment of the present invention, the shared switch is configured to be turned on to reduce the potential of the sub-pixel electrode.

[0012] According to an embodiment of the present invention, the scan signal of the scan line is configured to have a first positive level pulse, the shared scan signal of the shared scan line is configured to have a second positive level pulse, the second positive level pulse being later than the first positive level pulse, and there is an interval time between the first positive level pulse and the second positive level pulse.

[0013] According to one embodiment of the present invention, the pixel driving module is configured for blue sub-pixels, red sub-pixels, or blue and red sub-pixels.

[0014] To address the aforementioned problems, a second aspect of the present invention provides a display device comprising the pixel circuit described above.

[0015] The pixel circuit and display device of the present invention, wherein the main switch is configured to be controlled by the scan signal of the local scan line to transmit the data signal of the data line to the main pixel electrode, the secondary switch is configured to be controlled by the scan signal of the local scan line to transmit the data signal of the data line to the secondary pixel electrode, and the shared switch is configured to be controlled by the shared scan signal of the shared scan line to lower the potential of the secondary pixel electrode. Thus, the potentials of the main pixel electrode and the secondary pixel electrode are different, significantly increasing the adjustable range of the LCS curve. This allows for the simultaneous satisfaction of the display device's low grayscale viewing angle and high grayscale transmittance requirements, appropriately controlling the difference in liquid crystal deflection angle, improving the viewing angle, and mitigating the large viewing angle color shift phenomenon in the liquid crystal display device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a circuit diagram of the pixel circuit according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of pixel brightness change when the shared switch turns on 1 / 4 frame time later than the main switch and the secondary switch, according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram illustrating the time interval between the scan signal and the shared scan signal in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the LCS curve in an embodiment of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the description herein, it should be understood that the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise,” etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] This document provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure of the invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided herein, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] In order to improve the large viewing angle color shift phenomenon in liquid crystal display panels (such as vertically aligned types), low color shift (LCS) design can be applied to pixel units.

[0026] For example, a first aspect of the present invention provides a pixel circuit that is applicable to liquid crystal display devices with low color shift design, such as liquid crystal display devices with multi-domain (e.g., quad-domain or octet) architecture, but is not limited thereto.

[0027] like Figure 1 As shown, the pixel circuit includes: multiple pixel driving modules L, used to drive multiple sub-pixels (such as red, green, and blue sub-pixels). For example, the pixel driving module L includes a main pixel control group M and a secondary pixel control group S. For example, the pixel driving module L including the main pixel control group M and the secondary pixel control group S can be configured for blue sub-pixels, red sub-pixels, or blue and red sub-pixels to optimize the display effect, but is not limited thereto.

[0028] like Figure 1 As shown, the main pixel control group M may include a main switch T1 and a main pixel electrode P1. The main switch T1 may be configured to be controlled by the scan signal G(n) of a primary scan line WG(n) to transmit the data signal D of a data line WD to the main pixel electrode P1. n is a positive integer representing a specific primary scan configuration in a multi-level scan architecture.

[0029] like Figure 1 As shown, the sub-pixel control group S may include a primary switch T2 and a primary pixel electrode P2. The primary switch T2 may be configured to be controlled by the scan signal of the current scan line G(n) to transmit the data signal D of the data line WD to the sub-pixel electrode P2.

[0030] like Figure 1 As shown, the pixel driving module may further include a shared switch T3, which can be configured to be controlled by a shared scan signal SG(n) of a shared scan line WSG(n) to lower the potential of the sub-pixel electrode P2.

[0031] The following examples illustrate embodiments of the pixel circuit, but are not intended to limit the scope of the invention.

[0032] For example, such as Figure 1 As shown, the main switch T1, the secondary switch T2, and the shared switch T3 are all transistor switches. Each transistor switch includes a control terminal, a first terminal, and a second terminal, such as the gate, drain, and source of a thin-film transistor (TFT), but not limited thereto. The control terminal can be controlled by an electrical signal to control the conduction state between the first terminal and the second terminal, so that the signal from the first terminal is transmitted to the second terminal.

[0033] like Figure 1 As shown, the control terminal of the main switch T1 is electrically connected to the scan line WG(n), the first terminal of the main switch T1 is electrically connected to the data line WD, and the second terminal of the main switch T1 is electrically connected to the main pixel electrode P1. For example, the main pixel electrode P1 includes a liquid crystal capacitor C11 and a storage capacitor C12. The liquid crystal capacitor C11 is electrically connected between the second terminal of the main switch T1 and a first common electrode Ccom, and the storage capacitor C12 is electrically connected between the second terminal of the main switch T1 and a second common electrode Acom.

[0034] like Figure 1 As shown, the control terminal of the secondary switch T2 is electrically connected to the scan line WG(n), the first terminal of the secondary switch T2 is electrically connected to the data line D, and the second terminal of the secondary switch T2 is electrically connected to the sub-pixel electrode P2. For example, the sub-pixel electrode P2 includes a liquid crystal capacitor C21 and a storage capacitor C22. The liquid crystal capacitor C21 is electrically connected between the second terminal of the secondary switch T2 and the first common electrode Ccom, and the storage capacitor C22 is electrically connected between the second terminal of the secondary switch T2 and the second common electrode Acom.

[0035] like Figure 1 As shown, the control terminal of the shared switch T3 is electrically connected to the shared scan line WSG(n), the first terminal of the shared switch T3 is electrically connected to the sub-pixel electrode P2 (such as the liquid crystal capacitor C21 and the storage capacitor C22) and the second terminal of the sub-switch T2, and the second terminal of the shared switch T3 is electrically connected to the second common electrode Acom.

[0036] like Figure 1As shown, during the display process, the main switch T1 and the secondary switch T2 can be turned on (ON) by the scan signal G(n) of the local scan line WG(n), while the shared switch T3 is turned off (OFF) by the shared scan signal SG(n) of the shared scan line WSG(n). This transmits the data signal D of the data line WD to the main pixel electrode P1 and the secondary pixel electrode P2, causing the main pixel electrode P1 (such as the liquid crystal capacitor C11 and the storage capacitor C12) and the secondary pixel electrode P2 (such as the liquid crystal capacitor C21 and the storage capacitor C12) to... The capacitor C22 is charged to the same potential (e.g., a high potential); then, the main switch T1 and the secondary switch T2 are closed by the scan signal SG(n) of the scan line WG(n) of the current level, and the shared switch T3 is opened by the shared scan signal SG(n) of the shared scan line WSG(n), so that the potentials of the main pixel electrode P1 and the secondary pixel electrode P2 are different. For example, the secondary pixel electrode P2 is discharged to the second common electrode Acom through the shared switch T3, so that the potential of the secondary pixel electrode P2 is lower than the potential of the main pixel electrode P1.

[0037] Alternatively, in one embodiment, as Figure 1 As shown, the main switch T1, the secondary switch T2, and the shared switch T3 are each transistor switches, each including a control terminal, a first terminal, and a second terminal. The control terminals of the main switch T1 and the secondary switch T2 are electrically connected to the scan line WG(n), and the control terminal of the shared switch T3 is electrically connected to the shared scan line WSG(n). Therefore, the control terminal of the shared switch can be controlled independently of the control terminals of the main switch and the secondary switch to adjust the brightness ratio between the main pixel electrode and the secondary pixel electrode.

[0038] Alternatively, in one embodiment, as Figure 1 As shown, the first terminal of the shared switch T3 is electrically connected to the sub-pixel electrode P2 and the second terminal of the sub-switch T2, and the second terminal of the shared switch T3 is electrically connected to a common electrode. Therefore, the sub-pixel electrode discharges through the shared switch, causing its potential to be lower than that of the main pixel electrode, thereby improving the viewing angle.

[0039] Alternatively, in one embodiment, as Figure 1As shown, the main pixel electrode P1 and the secondary pixel electrode P2 each include a liquid crystal capacitor (such as C11, C21) and a storage capacitor (such as C12, C22). The liquid crystal capacitor C21 of the secondary pixel electrode P2 is electrically connected to the second terminal of the secondary switch T2 and a first common electrode Ccom. The storage capacitor C22 of the secondary pixel electrode P2 is electrically connected to the second terminal of the secondary switch T2 and a second common electrode Acom. The second terminal of the shared switch T3 is electrically connected to the second common electrode Acom. Thus, the secondary pixel electrode discharges to the second common electrode through the shared switch, making the potential of the main pixel electrode different from that of the secondary pixel electrode, thereby appropriately controlling the difference in liquid crystal deflection angle.

[0040] Alternatively, in one embodiment, as Figure 1 As shown, the shared switch T3 is configured to be turned on to lower the potential of the sub-pixel electrode P2. Therefore, the potential of the sub-pixel electrode is lower than the potential of the main pixel electrode, making the potentials of the main pixel electrode and the sub-pixel electrode different, which can improve the large-viewing-angle color shift phenomenon in the liquid crystal display device.

[0041] Alternatively, in one embodiment, as Figure 1 As shown, the local scan line WG(n) and the shared scan line WSG(n) are mutually insulated. For example, the local scan line WG(n) and the shared scan line WSG(n) are disposed on two metal material layers, with an insulating layer between the two metal material layers to avoid mutual interference of control signals. Therefore, the scan signal of the local scan line and the shared scan signal of the shared scan line can be independent of each other. The shared scan signal can have its duration adjusted using time division between the scan signals, allowing for flexible adjustment of the potential and brightness ratio between the sub-pixel electrode and the main pixel electrode.

[0042] It should be noted that the duration for which the sub-pixel electrode is at a high potential and at a low potential is adjustable (time segmentation), allowing low color shift (LCS) characteristic parameters (such as the ratio of the brightness of the sub-pixel electrode to the brightness of the main pixel electrode) to be flexibly adjusted.

[0043] For example, consider the pixel brightness that is activated by the shared switch 1 / 4 frame later than the main switch and the secondary switch. Figure 2 This diagram illustrates pixel brightness changes when a shared switch is activated 1 / 4 frame later than the main and secondary switches. The vertical axis represents a positive correlation between pixel brightness and voltage, while the horizontal axis represents time. Figure 2In the example of two frames, U1 represents the brightness curve of the high grayscale main pixel electrode when the main switch is turned on and the main pixel electrode is maintained at a high level (e.g., 14 volts); U2 represents the brightness curve of the high grayscale sub-pixel electrode when the secondary switch is turned on and off and the sub-pixel electrode has a high-level pulse; U3 represents the brightness curve of the low grayscale main pixel electrode when the main switch is turned on and the main pixel electrode is maintained at a low level (e.g., 0.2 volts); U4 represents the brightness curve of the low grayscale sub-pixel electrode during the charging and discharging process of the sub-pixel electrode when the secondary switch is turned on and off; and U5 represents the voltage curve of the shared switch that is turned on 1 / 4 frame later than the main switch and the secondary switch.

[0044] exist Figure 2 As shown by curve U1, the main pixel electrode maintains high brightness at high gray levels; as shown by curve U3, the main pixel electrode maintains low brightness at low gray levels.

[0045] exist Figure 2 As shown by curves U2 and U5, when the secondary switch is turned on (high level as shown by curve U2) and the shared switch is turned off (low level as shown by curve U5), the secondary pixel electrode maintains high brightness at high grayscale (as shown by curve U2), and when the secondary switch is turned off (low level as shown by curve U2) and the shared switch is turned on (high level as shown by curve U5), the secondary pixel electrode maintains low brightness at high grayscale (as shown by curve U2), so that the brightness of the secondary pixel electrode is different from the brightness of the primary pixel electrode.

[0046] It should be noted that after the shared switch is turned on, the voltage of the sub-pixel electrode decreases, resulting in brightness changes. However, the brightness change frequency is consistent with the refresh rate of the display panel, unlike the flickering image where the brightness change frequency is twice the refresh rate of the display panel. Therefore, the brightness changes after the shared switch is turned on will not cause obvious flickering.

[0047] exist Figure 2 As shown in curves U4 and U5, after the shared switch is turned on, in another frame (e.g.) Figure 2In frame 2), when the secondary switch is turned on (high level as shown in curve U2) and the shared switch is turned off (low level as shown in curve U5), the brightness of the secondary pixel electrode gradually increases at low gray levels because the liquid crystal reacts slowly at low gray levels (as shown in curve U4). Before the brightness of the secondary pixel electrode reaches the brightness of the main pixel electrode, the secondary switch is turned off and the shared switch is turned on (high level as shown in curve U5), causing the secondary pixel electrode to start discharging. The brightness of the secondary pixel electrode gradually decreases at low gray levels (as shown in curve U4), resulting in even lower brightness at low gray levels. Therefore, the LCS characteristic parameters at low gray levels are lower than those at high gray levels, causing the LCS characteristic curve to show an upward trend.

[0048] exist Figure 2 As shown by curves U2, U4, and U5, after the shared switch is turned on, the voltage of the sub-pixel electrode decreases, resulting in a decrease in the brightness of the sub-pixel electrode. Since the LCS characteristic parameter is the ratio of the brightness of the sub-pixel electrode to the brightness of the main pixel electrode, the brightness of the sub-pixel electrode can be adjusted by changing the time the shared switch is turned on, thereby controlling the LCS characteristic parameter.

[0049] It should be noted that, such as Figure 1 As shown, since the local scan line WG(n) and the shared scan line WSG(n) are insulated from each other, the scan signal G(n) of the local scan line WG(n) and the shared scan signal SG(n) of the shared scan line WSG(n) are delivered separately, so that the opening time of the shared switch T3 can be controlled independently.

[0050] For example, such as Figure 1 and Figure 3 As shown, after the pulse of the scan signal G(n) of the local scan line WG(n) changes from high level to low level, after a certain interval t, the pulse of the shared scan signal SG(n) of the shared scan line WSG(n) changes from low level to high level. This causes the potential of the sub-pixel electrode P2 to decrease after the interval t while the sub-pixel electrode P2 is maintained at a high potential. The potential of the sub-pixel electrode P2 is lower than the potential of the main pixel electrode P1, making the potential of the main pixel electrode P1 different from that of the sub-pixel electrode P2. This allows for appropriate adjustment of the liquid crystal deflection angle difference, thereby improving the viewing angle and mitigating the large viewing angle deflection phenomenon of the liquid crystal display device.

[0051] Alternatively, in one embodiment, as Figure 1 and Figure 3As shown, the scan signal G(n) of the scan line WG(n) is configured to have a first positive level pulse, and the shared scan signal SG(n) of the shared scan line WSG(n) is configured to have a second positive level pulse. The second positive level pulse is later than the first positive level pulse, and there is an interval between the first positive level pulse and the second positive level pulse. Therefore, by adjusting the interval, the potential and brightness ratio between the main pixel electrode and the sub-pixel electrode can be adjusted.

[0052] Furthermore, a second aspect of the present invention provides a display device, such as a liquid crystal display device having a low color shift architecture, the display device including the pixel circuit described above, the implementation details of which can be found in the above embodiments and will not be repeated here.

[0053] It should be noted that the pixel circuit and display device of the above embodiments of the present invention, by individually controlling the opening and closing time of the shared switch, enable the display process of the sub-pixels to have a time segmentation effect. For example... Figure 4 As shown, this significantly increases the adjustable range of an LCS curve V that exhibits an upward trend. In the low grayscale range (as shown in range E1), the LCS characteristic parameter is low, resulting in a better viewing angle; in the high grayscale range (as shown in range E2), the LCS characteristic parameter is high, resulting in better transmission. This simultaneously satisfies the display device's requirements for both low grayscale viewing angle and high grayscale transmission. Therefore, the pixel circuit and display device of the above embodiments of the present invention can improve the problems arising from the downward trend or limited adjustable range of the LCS curve in the prior art, such as limited viewing angle and transmittance.

[0054] The pixel circuit and display device of the above embodiments of the present invention, wherein the main switch is configured to be controlled by the scan signal of the local scan line to transmit the data signal of the data line to the main pixel electrode, the secondary switch is configured to be controlled by the scan signal of the local scan line to transmit the data signal of the data line to the secondary pixel electrode, and the shared switch is configured to be controlled by the shared scan signal of the shared scan line to lower the potential of the secondary pixel electrode. Thus, the potentials of the main pixel electrode and the secondary pixel electrode are different, significantly increasing the adjustable range of the LCS curve. This allows for the simultaneous satisfaction of the display device's low grayscale viewing angle and high grayscale transmittance requirements, appropriately controlling the difference in liquid crystal deflection angle, improving the viewing angle, and mitigating the large viewing angle color shift phenomenon of the liquid crystal display device.

[0055] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pixel circuit, characterized by comprising: include: Multiple pixel driving modules, the pixel driving module comprising: A main pixel control group includes a main switch and a main pixel electrode, wherein the main switch is configured to be controlled by a scan signal of a primary scan line to transmit a data signal of a data line to the main pixel electrode; A primary pixel control group includes a primary switch and a primary pixel electrode, wherein the primary switch is configured to be controlled by the scan signal of the current scan line to transmit the data signal of the data line to the primary pixel electrode; and A shared switch is configured to be controlled by a shared scan signal of a shared scan line to lower the potential of the sub-pixel electrode. The control terminal of the shared switch is independent of the control terminal of the main switch and the control terminal of the sub-switch. The duration of the sub-pixel electrode being at a high potential and at a low potential is adjustable by the shared scan signal. The shared scanning signal controls the opening and closing time of the shared switch to control the pixel driving module to have a first low color shift feature parameter and a second low color shift feature parameter in low grayscale and high grayscale respectively, and the value of the first low color shift feature parameter is lower than the value of the second low color shift feature parameter. Wherein, the first low color shift feature parameter is a ratio of the brightness of the sub-pixel electrode to the brightness of the main pixel electrode, and the second low color shift feature parameter is another ratio of the brightness of the sub-pixel electrode to the brightness of the main pixel electrode. The shared switch is activated 1 / 4 frame later than the main switch and the secondary switch, and after the shared switch is activated, the brightness change frequency caused by the voltage drop of the secondary pixel electrode is consistent with the refresh rate of the display panel.

2. The pixel circuit of claim 1, wherein, The main switch, the secondary switch, and the shared switch are each transistor switches. Each transistor switch includes a control terminal, a first terminal, and a second terminal. The control terminals of the main switch and the secondary switch are electrically connected to the scan line, and the control terminal of the shared switch is electrically connected to the shared scan line.

3. The pixel circuit of claim 2, wherein, The first terminal of the shared switch is electrically connected to the sub-pixel electrode and the second terminal of the sub-switch, and the second terminal of the shared switch is electrically connected to a common electrode.

4. The pixel circuit according to claim 3, characterized in that, The main pixel electrode and the sub-pixel electrode each include a liquid crystal capacitor and a storage capacitor. The liquid crystal capacitor of the sub-pixel electrode is electrically connected to the second terminal of the sub-switch and a first common electrode. The storage capacitor of the sub-pixel electrode is electrically connected to the second terminal of the sub-switch and a second common electrode. The second terminal of the shared switch is electrically connected to the second common electrode.

5. The pixel circuit according to claim 1, characterized in that, The local scan line and the shared scan line are mutually insulated.

6. The pixel circuit according to claim 1, characterized in that, The local scan line and the shared scan line are disposed on two metal material layers, and an insulating layer is disposed between the two metal material layers.

7. The pixel circuit according to claim 1, characterized in that, The shared switch is configured to be turned on to reduce the potential of the sub-pixel electrode.

8. The pixel circuit according to claim 1, characterized in that, The scan signal of the scan line is configured to have a first positive level pulse, and the shared scan signal of the shared scan line is configured to have a second positive level pulse, the second positive level pulse being later than the first positive level pulse, and there is an interval between the first positive level pulse and the second positive level pulse.

9. The pixel circuit according to claim 1, characterized in that, The pixel driving module is configured for blue sub-pixels, red sub-pixels, or blue and red sub-pixels.

10. A display device, characterized in that, Includes the pixel circuit according to any one of claims 1 to 9.

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