Pixel driving circuit, display panel and terminal

Abstract

The present disclosure provides a pixel driving circuit, a display panel, and a terminal. The pixel driving circuit includes a pixel driving unit and a voltage compensation unit. The voltage compensation unit is electrically connected to a capacitor storage unit in the pixel driving unit. The voltage compensation unit is configured to compensate the capacitor storage unit for a set voltage when the pixel driving unit is in an operating state with a set frame rate. In the present disclosure, a voltage compensation unit is newly added to the pixel driving circuit. When the pixel driving unit is in an operating state with a set frame rate, the voltage compensation unit can compensate the capacitor storage unit for a set voltage, thereby effectively preventing color deviation in the pixel driving unit when in the operating state with a set frame rate. The display effect of the display panel to which this pixel driving unit belongs improves the user experience.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a pixel driving circuit, a display panel, and a terminal. Background Art

[0002] AMOLED driving technology boasts the advantages of high refresh rate, high contrast, wide color gamut, and flexibility. Currently, AMOLED technology is widely used in mobile phones, TVs, and other end products. AMOLED, short for Active-matrix organic light-emitting diode (AMOLED), is a display technology. OLED (organic light-emitting diode) describes a specific type of thin-film display technology: organic electroluminescent display; AM refers to the way the underlying pixels emit light, a current-driven active luminescence technology.

[0003] In recent years, thin film transistors (TFTs) in mobile phones and other terminal products have increasingly been implemented using LTPO (Low Temperature Polycrystalline Oxide) technology. LTPO is a combination of LTPS (Low Temperature Poly-Silicon) and IGZO (indium gallium zinc oxide). TFTs implemented using LTPO technology are generally referred to as LTPO TFTs. LTPO TFTs can achieve lower refresh rates, reducing power consumption in mobile phones.

[0004] However, in the current pixel driving circuit based on LTPO TFT, the low frame rate implementation of LTPO TFT adopts frame skipping in terms of timing. It takes a high frame rate as the benchmark and reduces the frame rate by skipping different numbers of frames. This can easily lead to color deviation at low brightness and low frame rate, resulting in a poor experience. Summary of the Invention

[0005] To overcome the problems existing in the related art, the present disclosure provides a pixel driving circuit, a display panel and a terminal.

[0006] According to a first aspect of an embodiment of the present disclosure, there is provided a pixel driving circuit, characterized in that the pixel driving circuit includes a pixel driving unit and a voltage compensation unit, wherein the voltage compensation unit is electrically connected to a capacitor storage unit in the pixel driving unit;

[0007] The voltage compensation unit is configured to perform voltage compensation of a set voltage for the capacitor storage unit when the pixel driving unit is in a working state of a set frame rate.

[0008] Optionally, the voltage compensation unit includes a compensation voltage switch unit;

[0009] The compensation voltage switch unit is configured to control the voltage compensation unit and the pixel driving unit to be electrically connected when the pixel driving unit is in a working state with a set frame rate, so that the voltage compensation unit performs voltage compensation for the capacitor storage unit.

[0010] Optionally, the voltage compensation unit includes a compensation control signal terminal, and the compensation control signal terminal is electrically connected to the compensation voltage switch unit;

[0011] The compensation control signal end is configured such that, when the pixel driving unit is in a working state with a set frame rate, the compensation control signal end controls the compensation voltage switch unit to be in an on state through a compensation control signal, so that the compensation voltage switch unit controls the voltage compensation unit to be electrically connected to the pixel driving unit.

[0012] Optionally, the voltage compensation unit includes a compensation voltage input terminal and a compensation voltage output terminal, the compensation voltage input terminal is electrically connected to the compensation voltage output terminal through the compensation voltage switch unit, and the voltage compensation unit is electrically connected to the capacitor storage unit through the compensation voltage output terminal.

[0013] Optionally, the compensation voltage switching unit includes a switching transistor, the input end of the switching transistor is electrically connected to the compensation voltage input end of the voltage compensation unit, the output end of the switching transistor is electrically connected to the compensation voltage output end of the voltage compensation unit, and the control end of the switching transistor is electrically connected to the compensation control signal end of the voltage compensation unit.

[0014] Optionally, the switching transistor includes a field effect transistor and / or a thin film transistor.

[0015] Optionally, the pixel driving unit includes a low-temperature polycrystalline oxide pixel driving circuit.

[0016] Optionally, the low-temperature polycrystalline oxide pixel driving circuit includes a 7T1C pixel driving circuit and / or a 7T2C pixel driving circuit.

[0017] Optionally, the set frame rate is positively correlated with the compensation voltage.

[0018] Optionally, the set frame rate is less than or equal to 60 Hz.

[0019] According to a second aspect of an embodiment of the present disclosure, a display panel is provided, comprising the pixel driving circuit as described in the first aspect.

[0020] According to a third aspect of the embodiments of the present disclosure, a terminal is provided, comprising a driver chip and the display panel according to the second aspect, wherein the driver chip is electrically connected to a pixel driving circuit of the display panel.

[0021] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: In the present disclosure, a voltage compensation unit is newly added to the pixel driving circuit. When the pixel driving unit is in a working state with a set frame rate, the voltage compensation unit may perform corresponding voltage compensation for the capacitor storage unit in the pixel driving unit, thereby effectively avoiding color deviation of the pixel driving unit in the working state with a set frame rate. The display effect of the display panel to which this pixel driving unit belongs enhances the user experience.

[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, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] Figure 1 is a block diagram of a pixel driving circuit according to an exemplary embodiment.

[0025] Figure 2 is a circuit diagram of a pixel driving circuit according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods of some embodiments of the present disclosure.

[0027] The disclosed embodiments provide a pixel driving circuit that incorporates a newly added voltage compensation unit. When the pixel driving unit operates at a set frame rate, the voltage compensation unit compensates the capacitor storage unit within the pixel driving unit for the corresponding voltage. This effectively prevents color deviations in the pixel driving unit at the set frame rate, improves the display quality of the display panel to which the pixel driving unit belongs, and enhances the user experience.

[0028] In one exemplary embodiment, a pixel driving circuit is provided. Figure 1 and Figure 2 As shown, the pixel driving circuit may include a pixel driving unit Drive and a voltage compensation unit Bv.

[0029] Among them, the pixel driving unit Drive may include a low-temperature polycrystalline oxide (LTPO) pixel driving circuit, and the LTPO pixel driving circuit refers to a pixel driving circuit based on LTPO technology. The LTPO pixel driving circuit may include a 7T1C pixel driving circuit, a 7T2C pixel driving circuit, or other types of pixel driving circuits, without limitation. Among them, a 7T1C pixel driving circuit generally refers to a pixel driving circuit including 7 transistors and 1 capacitor. A 7T2C pixel driving circuit generally refers to a pixel driving circuit including 7 transistors and 2 capacitors.

[0030] The voltage compensation unit Bv may be electrically connected to the capacitor storage unit Cst in the pixel drive unit Drive. The voltage compensation unit Bv may be configured such that, when the pixel drive unit Drive is in an operating state with a set frame rate, the voltage compensation unit Bv may perform voltage compensation for the capacitor storage unit Cst. That is, in the pixel drive circuit, when the pixel drive unit Drive is in an operating state with a set frame rate, the voltage compensation unit Bv may perform voltage compensation for the capacitor storage unit Cst with a compensation voltage, thereby preventing color deviation in the pixel drive unit Drive when in the operating state with a set frame rate.

[0031] It should be noted that the capacitance storage unit Cst may include one capacitor or two capacitors, without limitation. For example, when the pixel driving unit Drive is a 7T1C type pixel driving circuit, the capacitance driving unit is a capacitor, i.e., a capacitor in the 7T1C type pixel driving circuit. In this case, the voltage compensation unit Bv is electrically connected to the one capacitor. For another example, when the pixel driving unit Drive is a 7T2C type pixel driving circuit, the capacitance driving unit is two capacitors, i.e., a capacitor in the 7T2C type pixel driving circuit. In this case, the voltage compensation unit Bv is electrically connected to both capacitors.

[0032] Among them, the set frame rate can be a low frame rate less than or equal to 60Hz, but its specific value is not limited. For example, the set frame rate can be 60Hz, 40Hz, 30Hz, 24Hz, 10Hz or 1Hz, etc. The compensation voltage can be greater than 0V and less than or equal to 0.5V, but its specific value is not limited, as long as it can avoid color deviation of the pixel driving unit Drive under the working state of the set frame rate. It should be noted that, under normal circumstances, the set frame rate is positively correlated with the compensation voltage. That is, the larger the set frame rate, the larger the compensation voltage will be.

[0033] It should be noted that when the pixel driving circuit is applied to a terminal with a display panel, such as a mobile phone, the voltage compensation unit Bv can be electrically connected to a driver chip. That is, the compensation voltage of the voltage compensation unit Bv can be provided by the terminal's driver chip. Of course, the voltage compensation unit Bv can also be electrically connected to other devices that can provide compensation voltage, and this is not limited to this.

[0034] In this pixel driving circuit, the pixel driving unit Drive, which is composed of an LTPO pixel driving circuit, and the voltage compensation unit Bv are electrically connected. The voltage compensation unit Bv can effectively avoid color deviation of the pixel driving unit Drive under the working state of the set frame rate, thereby improving the display effect of the display panel to which this pixel driving unit Drive belongs and enhancing the user experience.

[0035] In one exemplary embodiment, a pixel driving circuit is provided. Figure 1 and Figure 2 As shown, in the pixel driving circuit, the voltage compensation unit Bv may include a compensation voltage switch T8 unit.

[0036] In which, the compensation voltage switch T8 unit can be configured such that when the pixel driving unit Drive is in the working state of the set frame rate, the compensation voltage switch T8 unit can control the voltage compensation unit Bv and the pixel driving unit Drive to be electrically conductive, so that the voltage compensation unit Bv performs voltage compensation for the capacitor storage unit Cst.

[0037] That is, in the pixel driving circuit, when the pixel driving unit Drive is in the working state of the set frame rate, the compensation voltage switch T8 unit can control the voltage compensation unit Bv and the pixel driving unit Drive to be electrically conductive, so that the voltage compensation unit Bv performs voltage compensation for the capacitor storage unit Cst, thereby avoiding color deviation of the pixel driving unit Drive in the working state of the set frame rate.

[0038] In addition, in the pixel driving circuit, when the pixel driving unit Drive is not in the working state of the set frame rate, the compensation voltage switch T8 unit can control the voltage compensation unit Bv to be electrically disconnected from the pixel driving unit Drive. In this case, the voltage compensation unit Bv can no longer perform voltage compensation for the capacitor storage unit Cst, thereby reducing power consumption.

[0039] The compensation voltage switch T8 unit may include a switching transistor or other device capable of performing a switching function, without limitation. The switching transistor may include a field-effect transistor (MOS transistor), a thin-film transistor (TFT transistor, also referred to as TFT), or other transistor capable of performing a switching function, without limitation. It should be noted that the MOS transistor may be a P-channel MOS transistor or an N-channel MOS transistor, without limitation. The TFT may be a silicon-based TFT or an oxygen-based TFT, without limitation.

[0040] In this pixel driving circuit, a compensation voltage switch T8 is provided to control the electrical connection state (including electrical conduction and electrical disconnection) between the voltage compensation unit Bv and the pixel driving unit Drive, thereby better improving the controllability and practicality of the pixel driving circuit. This can not only prevent color deviation of the pixel driving unit Drive when operating at a set frame rate, thereby improving the display effect of the display panel to which this pixel driving unit Drive belongs, but also avoid unnecessary voltage compensation when the pixel driving unit Drive is not operating at the set frame rate, thereby reducing power consumption and better improving the user experience.

[0041] In one exemplary embodiment, a pixel driving circuit is provided. Figure 1 and Figure 2 As shown, in the pixel driving circuit, the voltage compensation unit Bv may include a compensation control signal terminal Ctrl. The compensation control signal terminal Ctrl may be electrically connected to the compensation voltage switch unit T8.

[0042] Among them, the compensation control signal terminal Ctrl can be configured so that when the pixel driving unit Drive is in the working state of the set frame rate, the compensation control signal terminal Ctrl can control the compensation voltage switch T8 unit to be in the on state through the compensation control signal, so that the compensation voltage switch T8 unit controls the voltage compensation unit Bv and the pixel driving unit Drive to be electrically conductive.

[0043] That is, in the pixel driving circuit, when the pixel driving unit Drive is in the working state of the set frame rate, the compensation control signal terminal Ctrl can control the compensation voltage switch T8 unit to be in the on state through the compensation control signal, so that the compensation voltage switch T8 unit controls the voltage compensation unit Bv and the pixel driving unit Drive to be electrically conductive, and then the voltage compensation unit Bv performs voltage compensation for the capacitor storage unit Cst to avoid color deviation of the pixel driving unit Drive in the working state of the set frame rate.

[0044] In addition, in the pixel driving circuit, when the pixel driving unit Drive is not in the working state of the set frame rate, the compensation control signal terminal Ctrl can control the compensation voltage switch T8 unit to be in the disconnected state through the compensation control signal, so that the compensation voltage switch T8 unit controls the voltage compensation unit Bv to be electrically disconnected from the pixel driving unit Drive. In this case, the voltage compensation unit Bv can no longer perform voltage compensation for the capacitor storage unit Cst, thereby reducing power consumption.

[0045] The compensation voltage switch T8 unit may be a switch transistor, and the compensation control signal terminal Ctrl may be electrically connected to the control terminal of the switch transistor, so that the compensation control signal terminal Ctrl can control the switch transistor through the compensation control signal.

[0046] In some embodiments,

[0047] The compensation voltage switch T8 unit can be a switching transistor, which can be a P-channel MOS transistor, also known as a P-type MOS transistor. The gate (G) of the P-type MOS transistor can serve as a control terminal, that is, the gate of the P-type MOS transistor is electrically connected to the compensation control signal terminal Ctrl of the voltage compensation unit Bv.

[0048] In this embodiment, the compensation control signal can be a low-level signal, the voltage of which is greater than the gate-set turn-on voltage of the P-type MOS transistor. When the compensation control signal terminal Ctrl inputs the low-level signal to the gate of the P-type MOS transistor, the P-type MOS transistor can be controlled to be in a conducting state.

[0049] In some embodiments,

[0050] The compensation voltage switch T8 unit can be a switching transistor, which can be an N-channel MOS transistor, also known as an N-type MOS transistor. The gate (G) of the N-type MOS transistor can serve as a control terminal, that is, the gate of the N-type MOS transistor is electrically connected to the compensation control signal terminal Ctrl of the voltage compensation unit Bv.

[0051] In this embodiment, the compensation control signal can be a high-level signal, the voltage of which is greater than the gate-set turn-on voltage of the P-type MOS transistor. When the compensation control signal terminal Ctrl inputs a high-level signal to the gate of the N-type MOS transistor, the N-type MOS transistor can be controlled to be in a conducting state.

[0052] In this pixel driving circuit, the electrical connection state (including electrical conduction and electrical disconnection) between the voltage compensation unit Bv and the pixel driving unit Drive is controlled by setting a compensation control signal terminal Ctrl, thereby better improving the controllability and practicality of the pixel driving circuit. This can not only prevent the pixel driving unit Drive from having color deviation when operating at a set frame rate, thereby improving the display effect of the display panel to which this pixel driving unit Drive belongs, but also avoid unnecessary voltage compensation when the pixel driving unit Drive is not operating at the set frame rate, thereby reducing power consumption and better improving the user experience.

[0053] In one exemplary embodiment, a pixel driving circuit is provided. Figure 1 and Figure 2 As shown, in the pixel driving circuit, the voltage compensation unit Bv may include a compensation voltage input terminal D and a compensation voltage output terminal. The compensation voltage input terminal D is electrically connected to the compensation voltage output terminal through the compensation voltage switch T8 unit, and the voltage compensation unit Bv is electrically connected to the capacitor storage unit Cst through the compensation voltage output terminal.

[0054] When the compensation voltage switch T8 is in the on state, the compensation voltage can be sequentially transmitted to the capacitor storage unit Cst through the compensation voltage input terminal D, the voltage compensation switch unit and the compensation voltage output terminal, thereby achieving voltage compensation for the capacitor storage unit Cst.

[0055] It should be noted that when the pixel driving circuit is applied to a terminal with a display panel such as a mobile phone, the compensation voltage input terminal D can be electrically connected to the driver chip. Of course, it can also be electrically connected to other devices that can provide compensation voltage, which is not limited to this.

[0056] The compensation voltage switch T8 unit may be a switch transistor, the input end of which may be electrically connected to the compensation voltage input end D of the voltage compensation unit Bv, and the output end of which may be electrically connected to the compensation voltage output end of the voltage compensation unit Bv.

[0057] In some embodiments,

[0058] The compensation voltage switch T8 unit can be a switching transistor, which can be a P-type MOS transistor. The source (S-pole) of the P-type MOS transistor can serve as an input terminal, and the drain (D-pole) of the P-type MOS transistor can serve as an output terminal. That is, the source of the P-type MOS transistor is electrically connected to the compensation voltage input terminal D, and the drain of the P-type MOS transistor is electrically connected to the compensation voltage output terminal.

[0059] In this embodiment, when the P-type MOS transistor is in the on state, the voltage compensation unit Bv can receive the compensation voltage through the compensation voltage input terminal D, the compensation voltage can be input into the P-type MOS transistor through the source of the P-type MOS transistor, then output through the drain of the P-type MOS transistor, and finally transmitted to the capacitor storage unit Cst through the compensation voltage output terminal.

[0060] In some embodiments,

[0061] The compensation voltage switch T8 unit can be a switching transistor, which can be an N-type MOS transistor. The source (S-pole) of the N-type MOS transistor can serve as an output terminal, and the drain (D-pole) of the N-type MOS transistor can serve as an input terminal. That is, the source of the N-type MOS transistor is electrically connected to the compensation voltage output terminal, and the drain of the N-type MOS transistor is electrically connected to the compensation voltage input terminal D.

[0062] In this embodiment, when the N-type MOS transistor is in the on state, the voltage compensation unit Bv can receive the compensation voltage through the compensation voltage input terminal D, the compensation voltage can be input into the N-type MOS transistor through the drain of the N-type MOS transistor, then output through the source of the N-type MOS transistor, and finally transmitted to the capacitor storage unit Cst through the compensation voltage output terminal.

[0063] In this pixel driving circuit, when the compensation voltage switch T8 unit is in the on state, the voltage compensation unit Bv can receive the compensation voltage through the compensation voltage input terminal D, and then transmit the compensation voltage to the capacitor storage unit Cst through the compensation voltage output terminal, so as to avoid color deviation of the pixel driving unit Drive under the working state of the set frame rate, improve the display effect of the display panel to which this pixel driving unit Drive belongs, and enhance the user experience.

[0064] In one exemplary embodiment, a pixel driving circuit is provided. Figure 1 and Figure 2 As shown, in the pixel driving circuit, the pixel driving module may be a 7T1C pixel driving circuit, and the compensation voltage switch T8 unit may be an N-type MOS tube.

[0065] The pixel driving module may include a capacitor storage unit Cst, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, and a seventh transistor T7.

[0066] Among them, the capacitive storage unit Cst can be a capacitor, and the voltage for storing the data signal is denoted as Vdata. The first transistor T1 and the second transistor T2 can be P-type MOS transistors, and the third transistor can be an N-type MOS transistor. The first transistor T1, the second transistor T2, and the third transistor T3 are used to write the data signal into the capacitive storage unit Cst. The fourth transistor T4 can be an N-type MOS transistor. The first reset voltage signal can reset the capacitive storage unit Cst through the fourth transistor T4, and can make the first transistor T1 in a critical conduction state, that is, the first transistor T1 is just in a conduction state. Among them, the voltage of the first reset voltage signal is denoted as V11. The fifth transistor T5 and the sixth transistor T6 can both be P-type MOS transistors. The seventh transistor T7 can be a P-type MOS transistor.

[0067] When the pixel driving circuit is in a working state with a high frame rate (e.g., 120 Hz) (i.e., the pixel driving circuit is not in a working state with a high frame rate), the working process is as follows:

[0068] In the first stage (also called the preparation stage), the fourth transistor T4 can be in a conduction state. The first reset voltage V11 is written into the pixel driving circuit through the fourth transistor T4 to reset the potential of the first node N1, so that the potential of the first node N1 reaches V11; and it can make the first transistor T1 in a conduction state to prepare for charging the capacitive storage unit Cst. In this stage, other transistors can all be in an off state.

[0069] In the second stage (also called the charging stage), the first transistor T1, the second transistor T2, and the third transistor T3 are all in a conduction state. Ideally, using the turn-on condition of the first transistor T1, the potential of the first node N1 reaches Vdata + Vth to complete the charging process of the capacitive storage unit Cst; in addition, the seventh transistor T7 is also in a conduction state to reset the potential of the second node N2, so that the potential of the second node N2 is equal to the voltage V12 of the second reset voltage signal. Among them, the turn-on condition of the first transistor T1 is: Vgs < Vth, where Vgs is the voltage difference between the gate and the source of the first transistor T1, and Vth is the threshold voltage of the first transistor T1, that is, the voltage at which the first transistor T1 is in a conduction state. In this stage, other transistors can all be in an off state.

[0070] In the third stage (also called the light-emitting stage), the first transistor T1, the fifth transistor T5, and the sixth transistor T6 are all in a conduction state, and other transistors can all be in an off state. Figure 1The circuit between the positive driving voltage signal VDD (also referred to as ELVDD) and the negative driving voltage signal VSS (also referred to as ELVSS) of the electroluminescent (EL) device is in a conductive state, thereby causing the pixel connected to the pixel driving circuit to emit light. The light-emitting current in the conductive circuit is related to the potential of the first node N1.

[0071] When the pixel driving circuit is in an operating state with a set frame rate (e.g., 40 Hz), frame skipping is generally used. That is, based on the workflow corresponding to the above-mentioned 120 Hz operating state, three frames are used as a unit, with the first frame receiving a data signal input and the remaining two frames not receiving a data signal input, thereby achieving a 40 Hz frame rate.

[0072] When the pixel driving circuit is operating at a set frame rate (e.g., 40 Hz), during the light-emitting phase of the pixel driving circuit, a driver chip or other device of the terminal may send a high-level signal to the compensation control signal terminal Ctrl. Upon receiving the high-level signal, the compensation control signal terminal Ctrl may transmit the signal to the gate of the compensation voltage switch T8 unit. The compensation voltage switch T8 unit may then enter a conductive state at the initial stage of the light-emitting phase and compensate the compensation voltage (i.e., the set voltage) to the capacitor storage unit Cst, thereby offsetting the effect of the EM signal on the potential of the first node N1 during the light-emitting phase. This maintains the light-emitting current and brightness of each RGB sub-pixel in the display panel and avoids color deviation. The EM signal refers to the signal used to drive the fifth transistor T5 and the sixth transistor T6 into a conductive state.

[0073] This pixel driving circuit adds a voltage compensation unit Bv based on the 7T1C pixel driving circuit. When the 7T1C pixel driving circuit is in the operating state of the set frame rate, the voltage compensation unit Bv can perform corresponding voltage compensation for the capacitor storage unit Cst, thereby effectively avoiding color deviation, improving the display effect of the display panel to which this pixel driving circuit belongs, and enhancing the user experience.

[0074] In one exemplary embodiment, a display panel is provided. The display panel includes the aforementioned pixel driving circuit. The pixel driving circuit effectively prevents color deviation when operating at a set frame rate, thereby improving the display quality of the display panel and enhancing the user experience.

[0075] In one exemplary embodiment, a terminal is provided, such as, but not limited to, a mobile phone, a laptop computer, or a desktop computer. This terminal may include a driver chip and the aforementioned display panel. The driver chip may be electrically connected to a pixel driver circuit of the display panel. In this terminal, when the display panel is in a display state at a set frame rate, color deviation can be effectively avoided, thereby improving the display quality of the display panel and enhancing the user experience.

[0076] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the claims.

[0077] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A pixel driving circuit, characterized in that: The pixel driving circuit includes a pixel driving unit and a voltage compensation unit, wherein the voltage compensation unit is electrically connected to the capacitor storage unit in the pixel driving unit; In which, the voltage compensation unit includes a compensation voltage switch unit, and the compensation voltage switch unit is configured to, when the pixel driving unit is in a working state with a set frame rate, control the voltage compensation unit and the pixel driving unit to be electrically connected, so that the voltage compensation unit performs voltage compensation for the compensation voltage of the capacitor storage unit to avoid color deviation of the pixel driving unit in the working state with the set frame rate.

2. The pixel driving circuit according to claim 1, wherein: The voltage compensation unit includes a compensation control signal terminal, and the compensation control signal terminal is electrically connected to the compensation voltage switch unit; The compensation control signal end is configured such that, when the pixel driving unit is in a working state with a set frame rate, the compensation control signal end controls the compensation voltage switch unit to be in an on state through a compensation control signal, so that the compensation voltage switch unit controls the voltage compensation unit to be electrically connected to the pixel driving unit.

3. The pixel driving circuit according to claim 1, wherein: The voltage compensation unit includes a compensation voltage input terminal and a compensation voltage output terminal. The compensation voltage input terminal is electrically connected to the compensation voltage output terminal through the compensation voltage switch unit. The voltage compensation unit is electrically connected to the capacitor storage unit through the compensation voltage output terminal.

4. The pixel driving circuit according to claim 1, wherein: The compensation voltage switching unit includes a switching transistor, the input end of the switching transistor is electrically connected to the compensation voltage input end of the voltage compensation unit, the output end of the switching transistor is electrically connected to the compensation voltage output end of the voltage compensation unit, and the control end of the switching transistor is electrically connected to the compensation control signal end of the voltage compensation unit.

5. The pixel driving circuit according to claim 4, wherein: The switching transistor includes a field effect transistor and / or a thin film transistor.

6. The pixel driving circuit according to claim 1, wherein: The pixel driving unit includes a low-temperature polycrystalline oxide pixel driving circuit.

7. The pixel driving circuit according to claim 6, wherein: The low-temperature polycrystalline oxide pixel driving circuit includes a 7T1C pixel driving circuit and / or a 7T2C pixel driving circuit.

8. The pixel driving circuit according to claim 1, wherein: The set frame rate is positively correlated with the compensation voltage.

9. The pixel driving circuit according to any one of claims 1 to 8, wherein: The set frame rate is less than or equal to 60 Hz.

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

11. A terminal, characterized in that: The terminal includes a driving chip and the display panel according to claim 10, and the driving chip is electrically connected to a pixel driving circuit of the display panel.

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