Micro-Led display driving circuit based on 13T2C and driving method thereof

Abstract

The invention discloses a Micro-Led display driving circuit based on 13T2C and a driving method of the Micro-Led display driving circuit. Comprising a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a twelfth transistor, a thirteenth transistor, a first capacitor, a second capacitor, a first micro light-emitting diode and a second micro light-emitting diode. A third micro light emitting diode; according to the pixel circuit, different Micro-LED pixel points share the same driving circuit, the area occupied by the driving circuit is reduced, and therefore higher pixel density can be supported; the threshold voltage drift is eliminated through the first capacitor C1, the pixel current of the circuit is controlled through the second capacitor C2, VDD I-R drop is compensated, and the display effect of pixels is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a 13T2C-based Micro-LED display driving circuit and a driving method thereof. Background Art

[0002] Micro-LEDs (micro-LEDs) are micron-sized LEDs (generally less than 50 μm) that are miniaturized from traditional light-emitting diodes (LEDs). These devices enable display arrays with ultra-high pixel density and resolution. Micro-LEDs are self-luminous, making color more easily and accurately tuned compared to organic light-emitting diodes (OLEDs), offering longer lifetimes and higher brightness. Furthermore, their compact size, thinness, and low cost make them ideal for micro-display applications. Micron- and even nano-sized LED arrays are the only display devices capable of integrating driving, emitting, and signal transmission functions with high luminous efficiency and low power consumption, achieving ultra-large-scale integrated light-emitting units. Combining the technological advantages of liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs), they offer far superior performance to current transistor-based TFTs or OLEDs, and boast a wider range of applications, including flexible and transparent displays. Due to their high density, small size, and high number of pixels, Micro-LEDs are poised to lead the third generation of display technology, characterized by high fidelity, interactivity, and personalized displays.

[0003] Micro-LED driving technology can be divided into passive matrix driving (PM) and active matrix driving (AM) based on the driving method. The advantages of passive driving are its relatively simple structure, low technical barriers, relatively mature technology, and low cost. However, passive driving uses a row-by-row scanning and gating method, so only one row of pixels can be illuminated at a time, while the pixels in other rows are off. This method reduces the average brightness of the display. As the number of rows increases, the average brightness will drop even more. To offset the brightness drop, high voltage and high current are used, but this will affect the device's luminous efficiency and lifespan. In the active driving method, each pixel has its own independent driving circuit. Each independent driving circuit consists of multiple thin-film transistors (TFTs) or complementary metal oxide semiconductors (CMOS) and capacitors. Utilizing the storage characteristics of capacitors, it is possible to avoid the use of large pulsed driving voltages or driving currents required by passive driving, thereby improving the device's luminous efficiency and lifespan.

[0004] However, traditional active driving circuits, such as 2T1C pixel driving circuits, are very sensitive to the threshold voltage and mobility variations of transistors. When the threshold voltage and mobility of the driving transistors change over time during operation, it will cause unstable light emission of pixel points, and then lead to uneven light emission and brightness among pixels, reducing the product yield and increasing the difficulty for subsequent work. Summary of the Invention

[0005] Object of the Invention: The object of the present invention is to provide a 13T2C-based Micro-Led display driving circuit and its driving method, which solve the problems of large area occupied by the driving circuit and low pixel density, eliminate threshold voltage drift and compensate for VDD I-R drop, and improve the display effect of pixels.

[0006] Technical Solution: A 13T2C-based Micro-Led display driving circuit according to the present invention is characterized by comprising: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a twelfth transistor, a thirteenth transistor, a first capacitor, a second capacitor, a first micro-light emitting diode, a second micro-light emitting diode, and a third micro-light emitting diode;

[0007] Wherein: The gate of the first transistor is connected to the first scan control signal, the source is connected to node B, and the drain is connected to the data voltage; the gate of the second transistor is connected to the sixth scan control signal, the drain is connected to node B, and the source is connected to node C; the gate of the third transistor is connected to the second scan control signal, the source is connected to the high-voltage power supply, and the drain is connected to the source of the fifth transistor; the gate of the fourth transistor is connected to the first scan control signal, the source is connected to the source of the fifth transistor, and the drain is connected to node A; the gate of the fifth transistor is connected to one end of the first capacitor, the other end of the first capacitor is connected to node B, and the drain is connected to the anode of the first micro-light-emitting diode; the gate of the sixth transistor is connected to the third scan control signal, the source is connected to the drain of the eleventh transistor, and the drain is grounded; the gate of the seventh transistor is connected to the first pulse width control signal, the source is connected to the anode of the first micro-light-emitting diode, and the drain is connected to the anode of the second micro-light-emitting diode; the gate of the eighth transistor is connected to the second pulse width control signal, the source is connected to the anode of the second micro-light-emitting diode, and the drain is connected to the anode of the third micro-light-emitting diode; the gate of the ninth transistor is connected to the third pulse width control signal, the source is connected to the anode of the third micro-light-emitting diode, and the drain is grounded; the gate of the tenth transistor is connected to the fourth scan control signal, the source is connected to node B, and the drain is connected to the cathode of the third micro-light-emitting diode; the gate of the eleventh transistor is connected to the second scan control signal, the source is connected to the high-voltage power supply, and the drain is connected to one end of the second capacitor, node D; the gate of the twelfth transistor is connected to the fifth scan control signal, the drain is connected to node C, and the source is connected to the reference voltage; the gate of the thirteenth transistor is connected to the fourth pulse width control signal, the source is connected to node A, and the drain is connected to the anode of the first micro-light-emitting diode;

[0008] Further, it further includes: One end of the second capacitor is connected to node C, and the other end is connected to node D; The first micro-light-emitting diode, the second micro-light-emitting diode, and the third micro-light-emitting diode are connected in series in sequence, and the cathode is grounded.

[0009] Further, the first scan control signal, the second scan control signal, the third scan control signal, the fourth scan control signal, the fifth scan control signal, the sixth scan control signal, the first pulse width control signal, the second pulse width control signal, the third pulse width control signal, the reference voltage, and the data voltage are all provided by an external timing controller.

[0010] Further, the driving timing sequentially includes the following stages:

[0011] Reset stage: The third scan control signal, the fourth scan control signal, and the sixth scan control signal are at a high potential, the other scan control signals and the data voltage are at a low potential, and all pulse width control signals are at a high potential;

[0012] Compensation stage: The first scan control signal, the third scan control signal, and the fifth scan control signal are at high potential, the remaining scan control signals and the data voltage are at low potential, and all pulse width control signals are at high potential; Holding stage: The third scan control signal and the fifth scan control signal are at high potential, the remaining scan control signals and the data voltage are at low potential, and the pulse width control signals are dynamically adjusted according to the display requirements; Emission stage: The second scan control signal, the sixth scan control signal, and the data voltage are at high potential, the remaining scan control signals are at low potential, and the pulse width control signals are dynamically adjusted according to the display requirements.

[0013] A driving method for a Micro-Led display driving circuit based on 13T2C according to the present invention includes the following steps: Reset stage: Discharge the first capacitor and the second capacitor through a control signal to zero the voltages of nodes A and B; Compensation stage: Store the difference between the threshold voltage of the fifth transistor and the data voltage through the first capacitor, and store the reference voltage through the second capacitor to eliminate the threshold voltage drift; Holding stage: Maintain the capacitor voltages, selectively turn on the seventh to ninth transistors according to the pulse width control signals, and control the lighting time of the micro light-emitting diodes; Emission stage: Compensate for the voltage drop of the power supply voltage through the second capacitor, and the driving current is independent of the threshold voltage. The formula is:

[0014] I Micro-LED =K(V GST5 -V TH5 ) 2

[0015] =K(V TH5 -V data +V dd +V ref -V dd -V TH5 ) 2

[0016] =K(V ref -V data ) 2

[0017] where K is a transistor characteristic parameter.

[0018] Further, the transistor is a thin film transistor or a silicon-based complementary metal oxide semiconductor.

[0019] Further, the first capacitor is used for threshold voltage compensation, and the second capacitor is used for power supply voltage (VDD) drop compensation.

[0020] Further, in the emission stage, by dynamically adjusting the first to third pulse width control signals, the brightness of the red, green, and blue micro light-emitting diodes is respectively controlled to achieve full-color display.

[0021] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: The present invention adopts a pixel multiplexing circuit and uses a method of sharing one driving circuit by three pixels, which reduces the area occupied by the driving circuit, thereby supporting a higher pixel density. Full color is achieved by controlling three different color Micro-LEDs through PWM signals; a compensation circuit is adopted. The threshold voltage drift is eliminated by the connection method of capacitor C1 and transistor diodes, and the pixel current of the circuit is controlled by the second capacitor C2 to compensate for the VDD I-R drop, so that the driving current is not affected by the threshold voltage of the driving transistor and the VDD I-R drop, improving the display effect of the pixels. Description of the Drawings

[0022] Figure 1 is the circuit diagram of the 13T2C pixel driving circuit for Micro-LED driving of the present invention;

[0023] Figure 2 is the timing diagram of the 13T2C pixel driving circuit for Micro-LED driving of the present invention;

[0024] Figure 3 is the schematic circuit diagram of the reset stage in the pixel driving method of the present invention;

[0025] Figure 4 is the schematic circuit diagram of the compensation stage in the pixel driving method of the present invention;

[0026] Figure 5 is the schematic circuit diagram of the holding stage in the pixel driving method of the present invention;

[0027] Figure 6 is the schematic circuit diagram of the light-emitting stage in the pixel driving method of the present invention. Detailed Embodiments

[0028] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

[0029] As Figure 1 shown, the embodiment of the present invention provides a Micro-Led display driving circuit based on 13T2C, including: a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, an eighth transistor T8, a ninth transistor T9, a tenth transistor T10, an eleventh transistor T11, a twelfth transistor T12, a thirteenth transistor T13, a first capacitor C1, a second capacitor C2, and a first micro light-emitting diode Micro-LED-R, a second micro light-emitting diode Micro-LED-G, and a third micro light-emitting diode Micro-LED-B.

[0030] The specific connection method is as follows: the gate of the first transistor T1 is connected to the first scan control signal V SCAN1 , the source of the first transistor T1 is electrically connected to node B, and the drain of the first transistor T1 is connected to the data voltage V data ; the gate of the second transistor T2 is connected to the sixth scan control signal V SCAN6 , the drain of the second transistor T2 is electrically connected to node B, and the source of the second transistor T2 is electrically connected to node C; the gate of the third transistor T3 is connected to the second scan control signal V SCAN2 , the source of the third transistor T3 is electrically connected to the high-voltage power supply V DD , the drain of the third transistor T3 is electrically connected to the source of the fifth transistor T5; the gate of the fourth transistor T4 is connected to the first scan control signal V SCAN1 , the source of the fourth transistor T4 is electrically connected to the source of the fifth transistor T5, and the drain of the fourth transistor T4 is connected to node A; the gate of the fifth transistor T5 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is electrically connected to node B, the drain of the fifth transistor T5 is electrically connected to the anode of the first micro light-emitting diode, the cathode of the first micro light-emitting diode is connected to the anode of the second micro light-emitting diode, and the source of the fifth transistor T5 is connected to the drain of the third transistor T3; the gate of the sixth transistor T6 is connected to the third scan control signal V SCAN3 , the source of the sixth transistor T6 is connected to node D, and the drain of the sixth transistor T6 is connected to the ground voltage GND; the gate of the seventh transistor T7 is connected to the first pulse width control signal V PWM1 , the source of the seventh transistor T7 is connected to the anode of the first micro light-emitting diode, the drain of the seventh transistor T7 is electrically connected to the anode of the second micro light-emitting diode, and the cathode of the second micro light-emitting diode is connected to the anode of the third micro light-emitting diode; the gate of the eighth transistor T8 is connected to the second pulse width control signal V PWM2 , the source of the eighth transistor T8 is connected to the anode of the second micro light-emitting diode, and the drain of the eighth transistor T8 is electrically connected to the anode of the third micro light-emitting diode; the gate of the ninth transistor T9 is connected to the third pulse width control signal V PWM3 , the source of the ninth transistor T9 is connected to the anode of the third micro light-emitting diode, the drain of the ninth transistor T9 is electrically connected to the cathode of the third micro light-emitting diode, and the cathode of the third micro light-emitting diode is connected to the ground voltage GND; the gate of the tenth transistor T10 is connected to the fourth scan control signal V SCAN4 , the source of the tenth transistor T10 is electrically connected to node B, and the drain of the tenth transistor T10 is connected to the cathode of the third micro light-emitting diode; the gate of the eleventh transistor T11 is connected to the second scan control signal V SCAN2 , the source of the eleventh transistor T11 is electrically connected to the high-voltage power supply V DD, the drain of the eleventh transistor T11 is connected to node D; the gate of the twelfth transistor T12 receives the fifth scan control signal V SCAN5 , the drain of the twelfth transistor T12 is electrically connected to node C, and the source of the twelfth transistor T12 receives the reference voltage V ref ; the gate of the thirteenth transistor T13 receives the fourth pulse width control signal V PWM4 , the source of the thirteenth transistor T13 is electrically connected to node A, the drain of the thirteenth transistor T13 is connected to the anode of the first micro light-emitting diode, and the cathode of the first micro light-emitting diode is connected to the anode of the second micro light-emitting diode; one end of the first capacitor C1 is electrically connected to node B, and the other end of the second capacitor C2 is electrically connected to node A; one end of the second capacitor C2 is electrically connected to node C, and the other end of the second capacitor C2 is electrically connected to node D.

[0031] According to one aspect of the present application, the transistors of the Micro-LED driving circuit can be thin film transistors (TFTs) or silicon-based complementary metal oxide semiconductors (silicon-based CMOS).

[0032] Further, the first scan control signal V SCAN1 , the second scan control signal V SCAN2 , the third scan control signal V SCAN3 , the fourth scan control signal V SCAN4 , the fifth scan control signal V SCAN5 , the sixth scan control signal V SCAN6 , the first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , the third pulse width control signal V PWM3 , the reference voltage V ref and the data voltage V data are all provided by an external timing controller.

[0033] As Figure 3 shown, the first scan control signal V SCAN1 , the second scan control signal V SCAN2 , the third scan control signal V SCAN3 , the fourth scan control signal V SCAN4 , the fifth scan control signal V SCAN5 , the sixth scan control signal V SCAN6 , the first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , the third pulse width control signal V PWM3 and the data voltage V data are combined to correspond to the reset stage, the compensation stage, the holding stage, and the light-emitting stage.

[0034] In a further embodiment, the specific working operation steps of a Micro-LED pixel circuit driving method based on a Micro-LED pixel driving circuit are as follows:

[0035] As Figure 2 shown, it is a 13T2C Micro-LED pixel driving circuit.

[0036] When entering the reset stage, in combination with Figure 3 and Figure 4 , the third scan control signal V SCAN3 , the fourth scan control signal V SCAN4 , and the sixth scan control signal V SCAN6 provide a high potential, and the first scan control signal V SCAN1 , the second scan control signal V SCAN2 , the fifth scan control signal V SCAN5 , the data voltage V data provide a low potential. The first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , and the third pulse width control signal V PWM3 provide a high potential. The second transistor T2, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the ninth transistor T9, the tenth transistor T10, and the thirteenth transistor T13 are all turned on, and the first transistor T1, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the eleventh transistor T11, and the twelfth transistor T12 are all turned off. Each Micro-LED pixel point is not lit. At this time, the first capacitor C1 and the second capacitor C2 are discharged, and the charges in the first capacitor C1 and the second capacitor C2 are discharged. At this time, the voltages of node A and node B are both 0, making the charges stored in the subsequent capacitors independent of the initial capacitor values and avoiding the influence of the initial capacitor values on the circuit.

[0037] When entering the compensation stage, in combination with Figure 3 and Figure 5 , the first scan control signal V SCAN1 , the third scan control signal V SCAN3 , and the fifth scan control signal V SCAN5 provide a high potential, and the second scan control signal V SCAN2 , the fourth scan control signal V SCAN4 , the sixth scan control signal V SCAN6 , the data voltage V data provide a low potential. The first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , and the third pulse width control signal V PWM3A high potential is provided, and the first transistor T1, the fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the ninth transistor T9, and the twelfth transistor T12 are all turned on, while the second transistor T2, the third transistor T3, the tenth transistor T10, and the eleventh transistor T11 are all turned off. At this time, the voltage difference between node C and node D is the reference voltage V ref , that is

[0038] V CD =V ref

[0039] The voltage difference between node A and node B is the threshold voltage V TH5 of the fifth transistor T5 and the data voltage V data difference, that is

[0040] V AB =V TH5 -V data

[0041] This makes the subsequent drive current independent of the threshold voltage of the drive transistor, avoiding the influence of threshold voltage drift on the circuit.

[0042] When entering the holding stage, in combination with Figure 3 and Figure 6 , the third scan control signal V SCAN3 , the fifth scan control signal V SCAN5 provide a high potential, and the first scan control signal V SCAN1 , the second scan control signal V SCAN2 , the fourth scan control signal V SCAN4 , the sixth scan control signal V SCAN6 , and the data voltage V data provide a low potential. The first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , and the third pulse width control signal V PWM3 provide the required potential according to the front-end display control. The first transistor T1, the fifth transistor T5, the sixth transistor T6, and the twelfth transistor T12 are all turned on, while the second transistor T2, the third transistor T3, the fourth transistor T4, the tenth transistor T10, and the eleventh transistor T11 are all turned off. The seventh transistor T7, the eighth transistor T8, and the ninth transistor T9 are determined to be switched on or off according to the real-time pulse width control voltage, and each Micro-LED is lit according to the signal control logic. Since this stage is very short, the voltages at both ends of the first capacitor C1 and the second capacitor C2 remain unchanged at this time, and the voltage at point A is still V TH5 , and the voltage at point B is still V data .

[0043] When entering the light-emitting stage, in combination with Figure 3 , the second scan control signal V SCAN2 , the sixth scan control signal V SCAN6 , and the data voltage V data provide a high potential, while the first scan control signal V SCAN1 , the third scan control signal V SCAN3 , the fourth scan control signal V SCAN4 , the fifth scan control signal V SCAN5 provide a low potential. The first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , and the third pulse width control signal V PWM3 provide the required potential according to the front-end display control. The second transistor T2, the third transistor T3, the fifth transistor T5, and the eleventh transistor T11 are all turned on, while the first transistor T1, the fourth transistor T4, the sixth transistor T6, the tenth transistor T10, and the twelfth transistor T12 are all turned off. The seventh transistor T7, the eighth transistor T8, and the ninth transistor T9 determine whether to switch according to the real-time pulse width control voltage, and each Micro-LED is lit according to the signal control logic. Due to the function of the storage capacitor in the circuit to store charges, the gate voltage of the driving transistor can be maintained basically unchanged, enabling each pixel to emit light according to the driving requirements within one frame time, which can improve the working efficiency of the circuit and reduce the power consumption of the circuit.

[0044] At this time, the second capacitor C2 remains unchanged, and the voltage at one end changes from the ground voltage GND to the power supply voltage V dd , so the voltage at point B becomes the sum of the power supply voltage and the reference voltage V dd + V ref . At this time, the first capacitor C1 remains unchanged, and the voltage at one end of C1, that is, the voltage at point B, changes from the data voltage V data to the sum of the power supply voltage and the reference voltage V dd + V ref . At this time, the gate voltage of the fifth transistor T5, that is, the voltage at point A, becomes V TH5 - V data + V dd + V ref , making the subsequent driving current magnitude independent of the power supply voltage. When using a transistor as the driving transistor, when the current flows through the micro-light-emitting diode, the current formula is:

[0045] I Micro-LED = K(V GST5 - V TH5 ) 2

[0046] = K(V TH5 - V data + V dd + Vref -V dd -V TH5 ) 2

[0047] = K(V ref -V data ) 2

[0048] where I Micro-LED is the total current flowing through the Micro-LED, K is the structural parameter of the driving transistor, i.e., the fifth transistor T5, V GST5 is the voltage difference between the gate and the source of the driving transistor, i.e., the fifth transistor T5, V TH5 is the threshold voltage of the fifth transistor T5. It can be seen that the magnitude of the driving current is only related to the structural parameter K of the driving transistor, the reference voltage V ref and the data voltage V data , and has nothing to do with the threshold voltage V TH5 and the power supply voltage V dd . Threshold voltage compensation and VDD I-R drop compensation are realized. Therefore, the driving current of the driving circuit proposed by the present invention can eliminate the factor of threshold voltage drift, which seriously affects the image quality of pixels.

[0049] The first pulse width control signal V PWM1 , the second pulse width control signal V PWM2 , and the third pulse width control signal V PWM3 control the lighting time and brightness of the first micro light-emitting diode Micro-LED-R, the second micro light-emitting diode Micro-LED-G, and the third micro light-emitting diode Micro-LED-B on the basis of the fifth transistor T5 to achieve full-color control display.

[0050] In summary, the Micro-LED pixel driving circuit of the present invention is a pixel driving circuit adopting a 13T2C structure and is paired with a specific driving timing. By adopting the method of sharing one driving circuit for three pixels, the area occupied by the driving circuit is reduced, so that a higher pixel density can be supported; three pulse width modulation (PWM) signals are used to control different three-color Micro-LEDs to achieve full color; by adopting a compensation circuit, threshold voltage drift can be eliminated by connecting a capacitor and a transistor diode, and the pixel current of the circuit can be controlled by the capacitor and VDD I-R drop can be compensated, so that the driving current is not affected by the threshold voltage of the driving transistor and VDD I-R drop, and the display effect of the pixels is improved.

Claims

1. A Micro-Led display driving circuit based on 13T2C, characterized in that, Including: The first transistor (T1), the second transistor (T2), the third transistor (T3), the fourth transistor (T4), the fifth transistor (T5), the sixth transistor (T6), the seventh transistor (T7), the eighth transistor (T8), the ninth transistor (T9), the tenth transistor (T10), the eleventh transistor (T11), the twelfth transistor (T12), the thirteenth transistor (T13), the first capacitor (C1), the second capacitor (C2), the first micro light-emitting diode (Micro-LED-R), the second micro light-emitting diode (Micro-LED-G), the third micro light-emitting diode (Micro-LED-B); Wherein: the gate of the first transistor (T1) is connected to a first scan control signal (V SCAN1 ), the source is connected to node B, and the drain is connected to a data voltage (V data ); the gate of the second transistor (T2) is connected to a sixth scan control signal (V SCAN6 ), the drain is connected to node B, and the source is connected to node C; the gate of the third transistor (T3) is connected to a second scan control signal (V SCAN2 ), the source is connected to a high voltage power supply (V DD ), and the drain is connected to the source of the fifth transistor (T5); the fourth The gate of the transistor (T4) is connected to the first scan control signal (V SCAN1 ), the source is connected to the source of the fifth transistor (T5), and the drain is connected to node A; the gate of the fifth transistor (T5) is connected to one end of the first capacitor (C1), the other end of the first capacitor (C1) is connected to node B, and the drain is connected to the anode of the first micro light-emitting diode; the gate of the sixth transistor (T6) is connected to the third scan control signal (V SCAN3 ), the source is connected to the drain of the eleventh transistor (T11), and the drain is grounded; the gate of the seventh transistor (T7) is connected to the first pulse width control signal (V PWM1 ), the source is connected to the anode of the first micro light-emitting diode, and the drain is connected to the anode of the second micro light-emitting diode; the gate of the eighth transistor (T8) is connected to the second pulse width control signal (V PWM2 ), the source is connected to the anode of the second micro light-emitting diode, and the drain is connected to the anode of the third micro light-emitting diode; the gate of the ninth transistor (T9) is connected to the third pulse width control signal (V PWM3 ), the source is connected to the anode of the third micro light-emitting diode, and the drain is grounded; the gate of the tenth transistor (T10) is connected to the fourth scan control signal (V SCAN4 ), the source is connected to node B, and the drain is connected to the cathode of the third micro light-emitting diode; the gate of the eleventh transistor (T11) is connected to the second scan control signal (V SCAN2 ), the source is connected to the high-voltage power supply (VDD), and the drain is connected to one end node D of the second capacitor (C2); the gate of the twelfth transistor (T12) is connected to the fifth scan control signal (V SCAN5 ), the drain is connected to node C, and the source is connected to the reference voltage (V ref ); the gate of the thirteenth transistor (T13) is connected to the fourth pulse width control signal (V PWM4 ), the source is connected to node A, and the drain is connected to the anode of the first micro light-emitting diode.

2. The Micro-Led display driving circuit based on 13T2C according to claim 1, wherein It also includes: One end of the second capacitor (C2) is connected to node C, and the other end is connected to node D; the first micro light-emitting diode, the second micro light-emitting diode, and the third micro light-emitting diode are connected in series in sequence, and the cathode is grounded.

3. A Micro-LED display driving circuit based on 13T2C according to claim 1, wherein, First scan control signal (V SCAN1 ), second scan control signal (V SCAN2 ), third scan control signal (V SCAN3 ), fourth scan control signal (V SCAN4 ), fifth scan control signal (V SCAN5 ), sixth scan control signal (V SCAN6 ), first pulse width control signal (V PWM1 ), second pulse width control signal (V PWM2 ), third pulse width control signal (V PWM3 ), reference voltage (V ref ) and data voltage (V data ) are all provided by an external timing controller.

4. A Micro-LED display driving circuit based on 13T2C according to claim 1, characterized in that, The driving timing sequentially includes the following stages: Reset stage: The third scan control signal (V SCAN3 ), the fourth scan control signal (V SCAN4 ), and the sixth scan control signal (V SCAN6 ) are at high potential, the remaining scan control signals and the data voltage (V data ) are at low potential, and all pulse width control signals are at high potential; Compensation stage: The first scan control signal (V SCAN1 ), the third scan control signal (V SCAN3 ), and the fifth scan control signal (V SCAN5 ) are at high potential, the remaining scan control signals and the data voltage (V data ) are at low potential, and all pulse width control signals are at high potential; Holding stage: The third scan control signal (V SCAN3 ), and the fifth scan control signal (V SCAN5 ) are at high potential, the remaining scan control signals and the data voltage (V data ) are at low potential, and the pulse width control signals are dynamically adjusted according to the display requirements; Emission stage: The second scan control signal (V SCAN2 ), the sixth scan control signal (V SCAN6 ), and the data voltage (V data ) are at high potential, the remaining scan control signals are at low potential, and the pulse width control signals are dynamically adjusted according to the display requirements.

5. A driving method for a Micro-Led display driving circuit based on 13T2C according to any one of claims 1-3, characterized in that, Including the following steps: Reset stage: Discharge the first capacitor (C1) and the second capacitor (C2) through a control signal, and the voltages of nodes A and B return to zero; Compensation stage: The threshold voltage (V TH5 ) of the fifth transistor (T5) and the data voltage (V data ) difference is stored by the first capacitor (C1), and the reference voltage (V ref ) is stored by the second capacitor (C2) to eliminate threshold voltage drift; Holding stage: The capacitor voltage is maintained, and the seventh to ninth transistors (T7-T9) are selectively turned on according to the pulse width control signal to control the lighting time of the micro light-emitting diode; Light-emitting stage: Compensate for the voltage drop of the power supply voltage (VDD) through the second capacitor (C2), and the driving current is independent of the threshold voltage. The formula is: I Micro-LED = K(V GST5 - V TH5 ) 2 =K(V TH5 -V data +V dd +V ref -V dd -V TH5 ) 2 = K(V ref - V data ) 2 Where K is the transistor characteristic parameter.

6. A driving method for a Micro-Led display driving circuit based on 13T2C according to claim 1, characterized in that The transistor is a thin-film transistor (TFT) or a silicon-based complementary metal oxide semiconductor (CMOS).

7. A driving method for a Micro-Led display driving circuit based on 13T2C according to claim 1, characterized in that The first capacitor (C1) is used for threshold voltage compensation, and the second capacitor (C2) is used for power supply voltage (V DD ) voltage drop compensation.

8. A driving method of a Micro-Led display driving circuit based on 13T2C according to claim 5, characterized in that, During the light-emitting phase, by dynamically adjusting the first to third pulse-width control signals (V PWM1 -V PWM3 ), the brightness of the red, green, and blue micro light-emitting diodes is controlled respectively to achieve full-color display.

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