Pixel driving circuit and display panel

Abstract

The present application belongs to the field of display, and specifically relates to a pixel driving circuit and a display panel. The pixel driving circuit includes a switching transistor, a voltage divider circuit and a pressure sensing circuit. The control end of the switching transistor is connected to a scan line, the first end of the switching transistor is connected to a data line, the second end of the switching transistor is connected to a pixel electrode, the first input end of the voltage divider circuit is connected to the data line, the second input end of the voltage divider circuit is connected to a common signal line, the output end of the voltage divider circuit is connected to a common electrode, and the pressure sensing circuit is connected to the voltage divider circuit. The pressure sensing circuit responds to external pressure and controls the voltage divider circuit to compensate for the common electrode voltage, so that the voltage difference between the common electrode voltage and the pixel electrode voltage is reduced, thereby reducing the deflection angle of the liquid crystal molecules accordingly, and accelerating the speed at which the liquid crystal molecules return to their original positions, which can suppress or eliminate the white line scratch phenomenon and improve the display effect of the display panel.

Description

Technical Field

[0001] The present application belongs to the field of display, and specifically relates to a pixel driving circuit and a display panel. Background Art

[0002] The pixel drive circuit of a display panel includes a switching transistor. The gate of the switching transistor is connected to a scan line, the source of the switching transistor is connected to a data line, and the drain of the switching transistor is connected to a pixel electrode. When the pixel drive circuit is in operation, a scan signal on the scan line turns on the switching transistor. The data voltage on the data line is written to the pixel electrode through the source and drain electrodes. This generates an electric field between the pixel electrode and the common electrode, driving the deflection of liquid crystal molecules in the liquid crystal layer, controlling the brightness of the sub-pixels, and realizing the display panel's image.

[0003] When a hard object scratches the display panel surface, while no physical damage is done to the display panel's surface coating, the liquid crystal molecules in the liquid crystal layer undergo a significant angle of deflection due to the combined effects of the electric field and the hard object. Once the pressure on the display panel is removed, the liquid crystal molecules are unable to return to their original positions within a short period of time, resulting in a white trace mura phenomenon that affects the display quality. Summary of the Invention

[0004] The purpose of this application is to provide a pixel driving circuit and a display panel to suppress or eliminate the white line scratch phenomenon and improve the display effect of the display panel.

[0005] To achieve the above-mentioned object, the present application provides a pixel driving circuit, comprising a switching transistor, wherein a control terminal of the switching transistor is connected to a scan line, a first terminal of the switching transistor is connected to a data line, and a second terminal of the switching transistor is connected to a pixel electrode. The pixel driving circuit further comprises:

[0006] A voltage divider circuit includes a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal of the voltage divider circuit is connected to the data line, the second input terminal of the voltage divider circuit is connected to the common signal line, and the output terminal of the voltage divider circuit is connected to the common electrode;

[0007] A pressure sensing circuit is connected to the voltage divider circuit, and is used to respond to external pressure and control the voltage divider circuit to compensate the common electrode voltage according to the data line voltage and the common signal line voltage, so that the voltage difference between the common electrode voltage and the pixel electrode voltage is reduced.

[0008] Optionally, the pressure sensing circuit includes a piezoresistor, and the voltage divider circuit compensates the common electrode voltage according to the resistance value of the piezoresistor.

[0009] Optionally, the varistor is a resistor with a positive pressure coefficient, and the voltage difference between the common electrode voltage and the pixel electrode voltage is negatively correlated with the resistance value of the varistor.

[0010] Optionally, the voltage divider circuit includes an operational amplifier and a first resistor, the operational amplifier includes a non-inverting input terminal, an inverting input terminal and an output terminal, the non-inverting input terminal of the operational amplifier is connected to the data line, the inverting input terminal of the operational amplifier is connected to the common signal line through the first resistor, and the inverting input terminal and the output terminal of the operational amplifier are connected through the varistor.

[0011] Optionally, the voltage-dividing circuit further includes a voltage-stabilizing capacitor, and the voltage-stabilizing capacitor is connected to the output end of the operational amplifier and the common electrode.

[0012] Optionally, the common electrode is also connected to the common signal line.

[0013] Optionally, in a natural state, the resistance value of the varistor is less than or equal to 1Ω, and the resistance value of the first resistor is greater than 1Ω.

[0014] Optionally, the voltage divider circuit further includes a second resistor and a third resistor, the second resistor is connected to the non-inverting input terminal of the operational amplifier and the ground terminal, and the third resistor is connected to the data line and the non-inverting input terminal of the operational amplifier.

[0015] The present application also provides a display panel, comprising:

[0016] pixel driving circuit;

[0017] The gate driving circuit is connected to the scanning line.

[0018] Optionally, the display panel includes multiple rows of scan lines, multiple columns of data lines, multiple pixel electrodes and the common electrode, each pixel driving circuit is arranged at the intersection of the scan line and the data line, the second end of each switching transistor is connected to a pixel electrode, the output end of each voltage divider circuit is connected to the common electrode, and the common electrode is also connected to the common signal line.

[0019] The pixel driving circuit and display panel disclosed in this application have the following beneficial effects:

[0020] In the present application, the control end of the switching transistor is connected to the scan line, the first end of the switching transistor is connected to the data line, the second end of the switching transistor is connected to the pixel electrode, the first input end of the voltage divider circuit is connected to the data line, the second input end of the voltage divider circuit is connected to the common signal line, the output end of the voltage divider circuit is connected to the common electrode, and the pressure sensing circuit is connected to the voltage divider circuit. The pressure sensing circuit is used to respond to external pressure, compensate for the common electrode voltage, reduce the voltage difference between the common electrode voltage and the pixel electrode voltage, and the deflection angle of the liquid crystal molecules in the liquid crystal layer is also reduced accordingly. The speed at which the liquid crystal molecules return to their original positions is accelerated, thereby suppressing or eliminating the white line scratch phenomenon and improving the display effect of the display panel.

[0021] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0024] Figure 1 It is a structural diagram of the pixel driving circuit in Example 1 of the present application.

[0025] Figure 2 This is a schematic diagram of the common electrode voltage and the data line voltage in Example 1 of the present application.

[0026] Figure 3 It is a structural diagram of the pixel driving circuit in the second embodiment of the present application.

[0027] Figure 4 It is a structural diagram of the display panel in Example 3 of the present application.

[0028] Description of reference numerals:

[0029] 100. Switching transistor;

[0030] 200, voltage divider circuit; 210, operational amplifier; 220, first resistor; 230, second resistor; 240, third resistor; 250, voltage stabilizing capacitor;

[0031] 300, pressure sensing circuit; 310, varistor;

[0032] 401, scan line; 402, data line; 403, pixel electrode; 404, common electrode; 405, common signal line;

[0033] 500. Gate drive circuit. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0035] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0036] The present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0037] Example 1

[0038] See also Figure 1 As shown, in this embodiment, the pixel driving circuit includes a switching transistor 100, a voltage divider circuit 200, and a pressure sensing circuit 300. The switching transistor 100 includes a control terminal, a first terminal, and a second terminal. The control terminal of the switching transistor 100 is connected to the scan line 401, the first terminal of the switching transistor 100 is connected to the data line 402, and the second terminal of the switching transistor 100 is connected to the pixel electrode 403. The switching transistor 100 can be a thin film transistor (TFT), and the control terminal, first terminal, and second terminal of the switching transistor 100 are the gate, source, and drain, respectively.

[0039] The voltage divider circuit 200 includes a first input terminal, a second input terminal, and an output terminal. The first input terminal of the voltage divider circuit 200 is connected to the data line 402, the second input terminal of the voltage divider circuit 200 is connected to the common signal line 405, and the output terminal of the voltage divider circuit 200 is connected to the common electrode 404. The pressure sensing circuit 300 is connected to the voltage divider circuit 200. The pressure sensing circuit 300 is used to respond to external pressure and control the voltage divider circuit 200 to compensate for the voltage of the common electrode 404 based on the voltage of the data line 402 and the voltage of the common signal line 405, thereby reducing the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage.

[0040] See also Figure 2 As shown, the data voltage Vdata on the data line 402 has positive and negative polarity. When the data voltage Vdata is greater than the voltage Vcom0 of the common signal line 405, it is a positive voltage. When the data voltage Vdata is less than the voltage Vcom0 of the common signal line 405, it is a negative voltage. The voltage divider circuit 200 compensates the voltage Vcom1 of the common electrode 404 to reduce the voltage difference between the voltage Vcom1 of the common electrode 404 and the voltage of the pixel electrode 403. That is, when the data voltage Vdata is positive, the voltage Vcom1 of the common electrode 404 is increased, and when the voltage of the data line 402 is negative, the voltage Vcom1 of the common electrode 404 is decreased.

[0041] The display panel includes an array substrate, an opposing substrate, and a liquid crystal layer disposed between the array substrate and the opposing substrate. A pixel driving circuit is disposed on the array substrate. The array substrate includes a pixel electrode 403 and a common electrode 404. The pixel electrode 403 and the common electrode 404 together form a storage capacitor Cst. The pixel electrode 403, the liquid crystal layer, and the common electrode 404 form a liquid crystal capacitor Clc. The display panel includes multiple pixel electrodes 403. Each pixel electrode 403, its corresponding common electrode 404, and liquid crystal molecules form a pixel unit. Each pixel driving circuit drives a corresponding pixel unit.

[0042] A control terminal of the switch transistor 100 is connected to the scan line 401 , a first terminal of the switch transistor 100 is connected to the data line 402 , and a second terminal of the switch transistor 100 is connected to the pixel electrode 403 .

[0043] When the pixel driving circuit is working: the scanning signal on the scanning line 401 controls the switching transistor 100 to turn on, and the data voltage Vdata on the data line 402 is written to the pixel electrode 403 through the source and drain. An electric field is generated between the pixel electrode 403 and the common electrode 404, driving the deflection of the liquid crystal molecules in the liquid crystal layer, controlling the brightness change of the sub-pixel, and realizing the picture display of the display panel.

[0044] The greater the voltage difference between the pixel electrode 403 and the common electrode 404 , the stronger the generated electric field, the greater the deflection angle of the liquid crystal molecules in the liquid crystal layer, and the slower the liquid crystal molecules cannot return to their original positions in a short time.

[0045] In this embodiment, the control end of the switching transistor 100 is connected to the scan line 401, the first end of the switching transistor 100 is connected to the data line 402, the second end of the switching transistor 100 is connected to the pixel electrode 403, the first input end of the voltage divider circuit 200 is connected to the data line 402, the second input end of the voltage divider circuit 200 is connected to the common signal line 405, the output end of the voltage divider circuit 200 is connected to the common electrode 404, and the pressure sensing circuit 300 is connected to the voltage divider circuit 200. The pressure sensing circuit 300 is used to respond to external pressure, compensate for the voltage of the common electrode 404, and reduce the voltage difference between the voltage of the common electrode 404 and the voltage of the pixel electrode 403. The deflection angle of the liquid crystal molecules in the liquid crystal layer is also reduced accordingly, and the speed at which the liquid crystal molecules return to their original positions is accelerated, thereby suppressing or eliminating the white line scratch phenomenon and improving the display effect of the display panel.

[0046] For example, see Figure 1 As shown, the pressure sensing circuit 300 includes a piezoresistor 310, and the voltage divider circuit 200 compensates the voltage of the common electrode 404 according to the resistance value of the piezoresistor 310. In this embodiment, the pressure sensing circuit 300 includes at least one piezoresistor 310. When the pressure sensing circuit 300 includes two or more piezoresistors 310, the piezoresistors 310 can be connected in series.

[0047] The pressure-sensing circuit 300 includes a piezoresistor 310. When the display panel is pressed, the resistance of the piezoresistor 310 changes. In response to this change in resistance, the pressure-sensing circuit 300 compensates for the voltage on the common electrode 404, reducing the voltage difference between the common electrode 404 and the pixel electrode 403. The magnitude of the voltage compensated by the pressure-sensing circuit 300 for the common electrode 404 is related to the resistance of the piezoresistor 310. This design controls the deflection angle of the liquid crystal molecules in the liquid crystal layer in response to external pressure, thereby suppressing or eliminating white line scratches.

[0048] In some embodiments, the piezoresistor 310 is a resistor with a positive pressure coefficient, and the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage is negatively correlated with the resistance value of the piezoresistor 310. The piezoresistor 310 is a resistor with a positive pressure coefficient, and the resistance value of the piezoresistor 310 is positively correlated with the external pressing pressure, that is, the greater the external pressing pressure, the greater the resistance value of the piezoresistor 310.

[0049] The voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage is negatively correlated with the resistance value of the varistor 310. That is, the greater the external pressing pressure, the greater the resistance value of the varistor 310, the greater the amplitude of the pressure sensing circuit 300 compensating the common electrode 404 voltage, and the corresponding smaller the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage, the faster the liquid crystal molecules return to their original positions, thereby suppressing or eliminating the white line scratch phenomenon and improving the display effect of the display panel.

[0050] It should be noted that the piezoresistor 310 may be a resistor with a positive pressure coefficient, but is not limited thereto. The piezoresistor 310 may also be a resistor with a negative pressure coefficient, depending on the specific situation.

[0051] See also Figure 1 As shown, the voltage divider circuit 200 includes an operational amplifier 210 and a first resistor 220. The operational amplifier 210 includes a non-inverting input terminal, an inverting input terminal, and an output terminal. The non-inverting input terminal of the operational amplifier 210 is connected to the data line 402, and the inverting input terminal of the operational amplifier 210 is connected to the common signal line 405 through the first resistor 220. The inverting input terminal and the output terminal of the operational amplifier 210 are connected through the piezoresistor 310. The piezoresistor 310 is a positive pressure coefficient resistor with a resistance value of R1, where R1 is a variable positively correlated with pressure. The resistance value of the first resistor 220 is R2.

[0052] The output voltage U1 of the operational amplifier 210 is affected by the resistance of the varistor 310. When there is no external pressure, the output voltage U1 of the operational amplifier 210 remains unchanged. When the external pressure increases, if the data voltage Vdata is positive, then based on the electrical characteristics of the differential operational amplifier circuit, the output voltage U1 of the operational amplifier 210 is calculated to be R1 / R2 (Vdata - Vcom0). The resistance of the varistor 310 increases, and the output voltage U1 of the operational amplifier 210 increases accordingly. If the data voltage Vdata is negative, the output voltage U1 of the operational amplifier 210 is R1 / R2 (Vdata - Vcom0). The resistance of the varistor 310 increases, and the output voltage U1 of the operational amplifier 210 decreases accordingly.

[0053] That is to say, regardless of whether the data voltage Vdata is positive or negative, when the external pressure increases, the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage decreases, and the liquid crystal molecules return to their original positions faster, thereby suppressing or eliminating the white line scratch phenomenon and improving the display effect of the display panel.

[0054] See also Figure 1The voltage divider circuit 200 further includes a second resistor 230 and a third resistor 240 . The second resistor 230 is connected to the non-inverting input terminal of the operational amplifier 210 and the ground terminal. The third resistor 240 is connected to the data line 402 and the non-inverting input terminal of the operational amplifier 210 .

[0055] The second resistor 230 is connected to the non-inverting input terminal of the operational amplifier 210 and the ground terminal, and the third resistor 240 is connected to the data line 402 and the non-inverting input terminal of the operational amplifier 210 , which can play a voltage stabilizing role and suppress voltage fluctuations of the common electrode 404 .

[0056] Example 2

[0057] See also Figure 3 As shown, the main difference between the second embodiment and the first embodiment is that the common electrode 404 in the second embodiment is further connected to the common signal line 405 .

[0058] The output voltage U1 of the operational amplifier 210 is affected by the resistance of the piezoresistor 310. When there is no external pressure, the output voltage U1 of the operational amplifier 210 remains unchanged, and the voltage at the common electrode 404 is equal to the voltage at the common signal line 405. When the external pressure increases, if the data voltage Vdata is positive, then based on the electrical characteristics of the differential operational amplifier circuit, the output voltage U1 of the operational amplifier 210 can be calculated to be R1 / R2 (Vdata-Vcom0). The resistance of the piezoresistor 310 increases, and the output voltage U1 of the operational amplifier 210 increases accordingly, causing the voltage at the common electrode 404 to increase. If the data voltage Vdata is negative, the output voltage U1 of the operational amplifier 210 is R1 / R2 (Vdata-Vcom0). The resistance of the piezoresistor 310 increases, causing the output voltage U1 of the operational amplifier 210 to decrease, and the voltage at the common electrode 404 to decrease. That is, no matter the data voltage Vdata is positive or negative, when the external pressure increases, the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage decreases.

[0059] The common electrode 404 is also connected to the common signal line 405. When there is no external pressure, the output voltage U1 of the operational amplifier 210 does not change, and the voltage of the common electrode 404 is equal to the voltage of the common signal line 405. When the external pressure changes, the voltage of the common electrode 404 is pulled down or up, and the voltage stability of the common electrode 404 is better.

[0060] It should be noted that the common electrode 404 may be an ITO electrode provided on the entire surface, but is not limited thereto. The common electrode 404 may also include a plurality of independently provided electrode blocks, each electrode block corresponding to each pixel electrode 403 on a one-to-one basis.

[0061] When the common electrode 404 is an ITO electrode set on the entire surface, the external pressure increases the resistance value of the varistor 310, and the voltage of the common electrode 404 corresponding to all pixel units is pulled down or up, and the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage is reduced. The overall brightness of the display panel is reduced but the contrast remains unchanged, and the speed at which the liquid crystal molecules return to their original positions is accelerated, which can suppress or eliminate the white line scratch phenomenon without affecting the normal display of the display panel.

[0062] The common electrode 404 includes a plurality of independently arranged electrode blocks, each electrode block corresponding to each pixel electrode 403. When the resistance value of the varistor 310 of the pressed pixel unit increases, only the voltage difference between the common electrode 404 voltage and the pixel electrode 403 voltage of the pressed pixel unit decreases. The brightness of the pressed area of ​​the display panel decreases, while the brightness of the unpressed area remains unchanged. However, the pressing blocks the line of sight, and the brightness difference between the pressed area and the unpressed area does not affect the display. When the pressing is eliminated, the liquid crystal molecules in the pressed area return to their original positions, which will not affect the normal display of the display panel.

[0063] See also Figure 3 As shown, the voltage divider circuit 200 further includes a voltage stabilizing capacitor 250 , which is connected to the output terminal of the operational amplifier 210 and the common electrode 404 .

[0064] When external pressure increases, if the data voltage Vdata is positive at this time, the resistance value of the varistor 310 increases, and the output voltage U1 of the operational amplifier 210 increases accordingly. The voltage on the left plate of the stabilizing capacitor 250 increases, and the voltage on the right plate of the stabilizing capacitor 250 also increases, and the voltage of the common electrode 404 is pulled up. If the data voltage Vdata is negative at this time, the resistance value of the varistor 310 increases, the output voltage U1 of the operational amplifier 210 decreases, the voltage on the left plate of the stabilizing capacitor 250 decreases, and the voltage on the right plate of the stabilizing capacitor 250 also decreases, and the voltage on the common electrode 404 is pulled down. The stabilizing capacitor 250 is arranged between the output of the operational amplifier 210 and the common electrode 404, which makes the voltage on the common electrode 404 more stable.

[0065] See also Figure 3 In a natural state, the resistance value of the varistor 310 is less than or equal to 1Ω, and the resistance value of the first resistor 220 is greater than 1Ω.

[0066] In the natural state, the resistance value of the varistor 310 is appropriately reduced, which can reduce the amplitude of the voltage divider circuit 200 compensating the common electrode 404 voltage, avoiding the common electrode 404 voltage being pulled too high or too low, and at the same time making the common electrode 404 voltage equal to the common signal line 405 voltage when not pressed.

[0067] Example 3

[0068] See 3 and Figure 4 As shown, the display panel includes multiple rows of scan lines 401, multiple columns of data lines 402, multiple pixel electrodes 403, and a common electrode 404. The display panel includes multiple pixel driving circuits and a gate driving circuit 500. The pixel driving circuits include the pixel driving circuits disclosed in Embodiments 1 and 2. Each pixel driving circuit is arranged at the intersection of a scan line 401 and a data line 402. The gate driving circuit 500 includes a GOA circuit. The gate driving circuit 500 is arranged on at least one side of the display panel in the row direction and is connected to the scan line 401.

[0069] The display panel includes a pixel driving circuit, in which the control end of the switching transistor 100 is connected to the scan line 401, the first end of the switching transistor 100 is connected to the data line 402, the second end of the switching transistor 100 is connected to the pixel electrode 403, the first input end of the voltage divider circuit 200 is connected to the data line 402, the second input end of the voltage divider circuit 200 is connected to the common signal line 405, the output end of the voltage divider circuit 200 is connected to the common electrode 404, and the pressure sensing circuit 300 is connected to the voltage divider circuit 200. The pressure sensing circuit 300 is used to respond to external pressure, compensate for the voltage of the common electrode 404, reduce the voltage difference between the voltage of the common electrode 404 and the voltage of the pixel electrode 403, and correspondingly reduce the deflection angle of the liquid crystal molecules in the liquid crystal layer. The liquid crystal molecules return to their original positions faster, thereby suppressing or eliminating the white line scratch phenomenon and improving the display effect of the display panel.

[0070] See 3 and Figure 4 As shown, the second end of each switch transistor 100 is connected to a pixel electrode 403 , the output end of each voltage divider circuit 200 is connected to a common electrode 404 , and the common electrode 404 is further connected to a common signal line 405 .

[0071] The common electrode 404 is connected to the common signal line 405. When there is no external pressure, the output voltage U1 of the operational amplifier 210 does not change, and the voltage of the common electrode 404 is equal to the voltage of the common signal line 405. When the external pressure changes, the voltage of the common electrode 404 is pulled down or up, and the voltage stability of the common electrode 404 is better.

[0072] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0073] In this application, unless otherwise specified or limited, terms such as "assembly" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0074] In the description of this specification, the reference terms "some embodiments", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0075] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent application.

Claims

1. A pixel driving circuit, comprising a switching transistor, wherein a control terminal of the switching transistor is connected to a scan line, a first terminal of the switching transistor is connected to a data line, and a second terminal of the switching transistor is connected to a pixel electrode, wherein: The pixel driving circuit further includes: A voltage divider circuit includes a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal of the voltage divider circuit is connected to the data line, the second input terminal of the voltage divider circuit is connected to the common signal line, and the output terminal of the voltage divider circuit is connected to the common electrode; a pressure sensing circuit connected to the voltage divider circuit, the pressure sensing circuit being configured to respond to external pressure and control the voltage divider circuit to compensate for the common electrode voltage according to the data line voltage and the common signal line voltage, thereby reducing the voltage difference between the common electrode voltage and the pixel electrode voltage; Wherein, the pressure sensing circuit includes a piezoresistor, and the voltage divider circuit compensates the common electrode voltage according to the resistance value of the piezoresistor; The voltage divider circuit includes an operational amplifier and a first resistor, the operational amplifier includes a non-inverting input terminal, an inverting input terminal and an output terminal, the non-inverting input terminal of the operational amplifier is connected to the data line, the inverting input terminal of the operational amplifier is connected to the common signal line through the first resistor, and the inverting input terminal and the output terminal of the operational amplifier are connected through the piezoresistor.

2. The pixel driving circuit according to claim 1, wherein: The varistor is a resistor with a positive pressure coefficient, and the voltage difference between the common electrode voltage and the pixel electrode voltage is negatively correlated with the resistance value of the varistor.

3. The pixel driving circuit according to claim 1, wherein: The voltage-dividing circuit further includes a voltage-stabilizing capacitor connected to the output end of the operational amplifier and the common electrode.

4. The pixel driving circuit according to claim 3, wherein: The common electrode is also connected to the common signal line.

5. The pixel driving circuit according to claim 4, wherein: In a natural state, the resistance value of the varistor is less than or equal to 1Ω, and the resistance value of the first resistor is greater than 1Ω.

6. The pixel driving circuit according to claim 1, wherein: The voltage divider circuit further includes a second resistor and a third resistor, the second resistor is connected to the non-inverting input terminal of the operational amplifier and the ground terminal, and the third resistor is connected to the data line and the non-inverting input terminal of the operational amplifier.

7. A display panel, characterized in that: include: The pixel driving circuit according to any one of claims 1 to 6; The gate driving circuit is connected to the scanning line.

8. The display panel according to claim 7, wherein: The display panel includes multiple rows of scan lines, multiple columns of data lines, multiple pixel electrodes and the common electrode. Each pixel driving circuit is arranged at the intersection of the scan line and the data line. The second end of each switching transistor is connected to a pixel electrode. The output end of each voltage divider circuit is connected to the common electrode, and the common electrode is also connected to the common signal line.

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