Drive circuit, drive method and display apparatus

Abstract

A drive circuit (100), a drive method, and a display apparatus (300). The drive circuit (100) comprises a timing control board (110), a glass substrate (120), a data drive chip (130), a load calculation module (140), and a current regulation module (150). The glass substrate (120) is provided with a plurality of wires connected to the timing control board (110) and receiving a drive signal and a power supply current signal; the load calculation module (140) is used for measuring and calculating a voltage difference value of the drive signal in unit time; the current regulation module (150) comprises a control selector (170) and, each connected in series to a power supply chip (112), a plurality of series resistance circuits (160); on the basis of the voltage difference value and resistance values of the wires on the glass substrate (120), the control selector (170) controls connection to the corresponding series resistance circuits (160), so as to control the value of the peak current output by the power supply chip (112).

Description

Drive circuit, drive method and display device Technical Field

[0001] This application relates to the field of display technology, and in particular to a driving circuit, driving method and display device. Background Technology

[0002] As a flat panel display device, TFT-LCD (Thin Film Transistor Liquid Crystal Display) is increasingly used in high-performance display fields due to its small size, low power consumption, no radiation, and relatively low manufacturing cost. When a TFT-LCD is displaying, the grid lines on each row of the display panel are scanned line by line to activate the pixel units connected to that row of grid lines. The data lines output data signals to the activated pixel units to charge them.

[0003] To further reduce the production cost of LCD products, existing circuits used for scanning gate lines often employ a G0A (Gate Driver on Array) design, integrating the TFT (Thin Film Transistor) gate switching circuit onto the array substrate of the display panel to form a scanning drive for the display panel. Glass substrates are used as glass PCBs, but due to the high impedance and lack of capacitors on the glass substrate, the instantaneous load of the power supply voltage is large, affecting the stability of the power supply reference ground, i.e., the 0-level reference voltage GND, and thus affecting the stability of all power supplies and voltages. Summary of the Invention

[0004] The purpose of this application is to provide a drive circuit, drive method, and display device that can improve the power supply system by improving the effect of excessive power supply voltage fluctuations caused by excessive load changes generating peak current.

[0005] This application discloses a driving circuit for driving a display panel. The driving circuit includes a timing control board, a glass substrate, a data driving chip, a load calculation module, and a current adjustment module. The timing control board is equipped with a timing control chip and a power chip. The timing control chip outputs a driving signal, and the power chip outputs a power current signal. The glass substrate has multiple traces connected to the timing control board to receive the driving signal and the power current signal. The data driving chip is connected to the traces on the glass substrate, receives the driving signal and the power current signal transmitted by the traces, and generates a corresponding data signal to be output to the data line. The load calculation module is used to detect and calculate the voltage difference of the driving signal flowing into the data driving chip per unit time. The current adjustment module is disposed on the timing control board and connected to the power chip. The current adjustment module includes multiple series resistor circuits connected in series with the power chip and a control selector. The control selector controls the connection of the corresponding series resistor circuit according to the voltage difference of the load calculation module and the resistance value of the traces on the glass substrate to control the peak current value output by the power chip.

[0006] This application also discloses a driving method for driving a circuit, the driving circuit including a timing control board and a glass substrate, the timing control board being provided with a current adjustment module, the current adjustment module including multiple series resistor circuits, the driving method including:

[0007] Detect and calculate the voltage difference of the drive signal flowing into the data driver chip per unit time; and

[0008] Based on the voltage difference and the resistance of the traces on the glass substrate, the corresponding series resistor circuit is connected in series to the circuit of the power chip and the glass substrate to control the peak current value output by the power chip.

[0009] The resistance values ​​will differ depending on the series resistor circuit.

[0010] This application also discloses a display device, the display device including a driving circuit and a display panel, the driving circuit being used to drive the display panel, the driving circuit including:

[0011] The timing control board includes a timing control chip and a power supply chip. The timing control chip outputs a drive signal, and the power supply chip outputs a power supply current signal.

[0012] The glass substrate has multiple traces connected to the timing control board to receive drive signals and power current signals.

[0013] The data driver chip is connected to the traces on the glass substrate, receives the drive signals and power current signals transmitted by the traces, and generates corresponding data signals to output to the data line.

[0014] A load calculation module is used to detect and calculate the voltage difference of the drive signal flowing into the data driver chip per unit time; and

[0015] A current regulation module is mounted on the timing control board and connected to the power chip;

[0016] The current regulation module includes multiple series resistor circuits connected in series with the power chip and a control selector. The control selector controls the connection to the corresponding series resistor circuit based on the voltage difference of the load calculation module and the resistance of the traces on the glass substrate, so as to control the peak current value output by the power chip.

[0017] This application uses a glass substrate to reduce costs, and additionally sets a current adjustment module on the timing control board. The current adjustment module is connected to the power chip and is used to adjust the peak current in the power supply current signal. The load calculation module judges the load, such as voltage difference. If the difference is within the range, no action is taken. If the difference is large, it means that the instantaneous current will increase. Then, the control selector selects the corresponding series resistor circuit in the series-connected circuit. The timing of the resistor being connected in series in the circuit is chosen to be at the moment of signal switching. At this time, a change will be generated. If the voltage difference per unit time is constant, to reduce the peak current, the resistance needs to be increased. Therefore, the function of the series resistor circuit is to prevent the instantaneous change of current from surging, so that it rises slowly. When the rise is complete, the series resistor is removed and the normal mode is restored. This solves the problem of large instantaneous current drawdown during light and heavy load switching, maintains the stability of the power supply and the 0-level reference voltage GND, and avoids excessive power supply current fluctuations leading to excessive power supply voltage fluctuations, which in turn cause abnormal gamma voltage levels and affect the display panel display. Attached Figure Description

[0018] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0019] Figure 1 is a schematic diagram of the driving circuit structure of the first embodiment of this application;

[0020] Figure 2 is a schematic diagram of the current regulation module structure according to the second embodiment of this application;

[0021] Figure 3 is a schematic diagram of the control signal waveform of the second embodiment of this application;

[0022] Figure 4 is a schematic diagram of the power supply current before and after improvement according to the second embodiment of this application;

[0023] Figure 5 is a schematic diagram of the driving circuit structure of the third embodiment of this application;

[0024] Figure 6 is a schematic diagram of the driving circuit structure of the fourth embodiment of this application;

[0025] Figure 7 is a schematic flowchart of the driving method according to the fifth embodiment of this application;

[0026] Figure 8 is a schematic flowchart of the driving method according to the sixth embodiment of this application;

[0027] Figure 9 is a schematic flowchart of the driving method of the seventh embodiment of this application;

[0028] Figure 10 is a schematic diagram of the structure of the display device according to the eighth embodiment of this application. Detailed Implementation

[0029] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0030] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0031] Referring to Figure 1, as a first embodiment of this application, a driving circuit 100 is disclosed. The driving circuit 100 is used to drive the display panel 200 to display. The driving circuit 100 includes a timing control board 110, a glass substrate 120, a data driving chip 130, a load calculation module 140, and a current adjustment module 150. The timing control board 110 is provided with a timing control chip 111 and a power chip 112. The timing control chip 111 outputs a driving signal, and the power chip 112 outputs a power current signal. The glass substrate 120 is provided with multiple traces, which are connected to the timing control board 110 to receive the driving signal and the power current signal. The data driving chip 130 is connected to the traces on the glass substrate 120 to receive the driving signal and the power current signal. The drive signal and power current signal transmitted by the wiring are received and the corresponding data signal is generated and output to the data line 210. The load calculation module 140 is used to detect and calculate the voltage difference of the drive signal flowing into the data drive chip 130 per unit time. The current adjustment module 150 is disposed on the timing control board 110 and connected to the power chip 112. The current adjustment module 150 includes a plurality of series resistor circuits 160 and a control selector 170 respectively connected in series with the power chip 112. The control selector 170 controls the connection of the corresponding series resistor circuit 160 according to the voltage difference of the load calculation module 140 and the resistance value of the wiring on the glass substrate 120, so as to control the peak current value output by the power chip 112.

[0032] In this embodiment, a glass substrate 120 is used as the PCB board. Although this reduces costs, the impedance of the glass is much greater than that of the original PCB board (more than 10 times the impedance). Furthermore, the glass PCB lacks capacitors for voltage regulation and current freewheeling, leading to a series of problems. The most critical issue is the stability of the power supply and GND. To ensure this stability, a current regulation module 150 is installed on the timing control board 110. This module is connected to the power chip 112 and is used to regulate the peak current in the power supply current signal. The load calculation module 140 determines the load, such as voltage differences. If the difference is within acceptable limits, no action is taken. If the difference is large, it means that the instantaneous current will increase. In this case, the control selector 170 selects the corresponding series resistor circuit 160 in the series-connected circuit. The timing of the resistor being connected in series is chosen at the moment of signal switching. At this time, a change will be generated. If the voltage difference per unit time is constant, the resistance needs to be increased to reduce the peak current. Therefore, the function of the series resistor circuit 160 is to prevent the instantaneous change in current from surging, so that it rises slowly. When the rise is complete, the series resistor is removed and the normal mode is restored. This solves the problem of large instantaneous current drawdown during light and heavy load switching, maintains the stability of the power supply and the 0-level reference voltage GND, and avoids excessive power supply voltage fluctuations caused by excessive power supply current fluctuations.

[0033] Since the current supplied to the display panel 200 is actually a charging process, the change in charge of the capacitor during charging is proportional to time. According to the definition of current (I = dQ / dt), the formula for calculating capacitance can be derived. Let the potential difference between the capacitor plates be V, the charge be Q, the time be t, and the initial charge of the capacitor be t. Then, we have I = dQ / dt = Q / t. According to the definitions of capacitance and charge, C = Q / V, we can derive I = dQ / dt = C(dV / dt) = CV / t, V = It / C. Here, C represents capacitance in farads (F), Q represents the amount of charge stored in the capacitor in coulombs (C), and V represents the potential difference between the capacitor plates in volts (V).

[0034] As shown in the formula above, the smaller the charging current, the smaller the instantaneous voltage V will be. Since the power required for each sub-pixel to display the corresponding grayscale is fixed, the power required for the entire panel display is P (which can be obtained through software simulation). Therefore, P = I²R. The larger the resistance, the smaller the current. The current Imax² = P / (trace resistance + load resistance), where Imax is the maximum instantaneous current supplied to the load for charging. This current is limited by the load resistance and trace resistance. Therefore, the role of the series resistor is to limit the instantaneous current and slow down the charging / discharging speed, so that the instantaneous voltage high / low points will not exceed our specifications.

[0035] Because the total power required for the panel varies depending on the grayscale and display conditions, Imax2 = Ptotal / (Rside + Rglass + Rseries). When switching loads, Ptotal = the power difference between the previous grayscale and the next grayscale. Since the resistance value (Rside) of the display panel 200 and the impedance value of the glass substrate trace (Rglass) can be obtained through simulation in the early design stage, different series impedance values ​​can be obtained according to different grayscale voltage power. However, since the selection of resistor Rseries in the series resistor circuit 160 is limited, it is not possible to design a resistance value for each grayscale. Therefore, it can be divided into ranges. For example, the maximum power is when all sub-pixels are 255 grayscale, and the minimum power is when all grayscales are 0 grayscale. Then the range is P0 to P255. The differences between different grayscales are adjusted separately by classifying and then using series resistors.

[0036] Referring to Figure 2, as a second embodiment of this application, which is a further refinement of the first embodiment described above, at least two series resistor circuits 160 are provided. Each series resistor circuit 160 is provided with two control switches and one resistor. The resistor in each series resistor circuit 160 is placed between the two control switches. The control terminals of the two control switches are respectively connected to a control selector 170. The control selector 170 outputs different control signals to the two control switches in each series resistor circuit 160 according to the voltage difference calculated by the load calculation module 140, so as to control the corresponding series resistor circuit 160 to be connected in series to the circuit of the power chip 112 and the glass substrate 120.

[0037] Intervening at the source of the problem: For the display panel 200, transitioning from light load to heavy load or vice versa is caused by sudden changes in the data voltage in the drive signal. Given a fixed trace resistance on the glass substrate 120 and a constant load at the back end, the greater the voltage difference per unit time, the greater the current. To solve this problem, the load calculation module 140 first calculates the load difference. If the difference is within a certain range, no action is taken. If the difference is large, indicating a sudden increase in current, the selector 170 outputs a control signal to select the series resistor circuit 160, choosing the resistor to be connected in series into the trace loop under different conditions. The resistor is added to the loop at the instant of signal switching, which generates a change in current. If the voltage difference per unit time is constant, increasing the resistance is needed to reduce the peak current. Therefore, the role of the series resistor is to impede the sudden surge in current, allowing the power supply output current to rise slowly. Once the current has risen sufficiently, the series resistor is removed, restoring normal operation.

[0038] Furthermore, there are at least four series resistor circuits 160, and generally four are provided. Taking four as an example, the four series resistor circuits 160 are respectively a first series resistor circuit 161, a second series resistor circuit 162, a third series resistor circuit 163, and a fourth series resistor circuit 164. The first series resistor circuit 161 includes a first control switch T1, a second control switch T2, and a first resistor R1. The control terminal of the first control switch T1 receives a first control signal S1, the input terminal is connected to the power chip 112, and the output terminal is connected to the input terminal of the second control switch T2 through the first resistor R1. The control terminal of the second control switch T2 receives a second control signal S2, and the output terminal is connected to the trace on the glass substrate 120. The second series resistor circuit 162 includes a third control switch T3, a fourth control switch T4, and a second resistor R2. The control terminal of the third control switch T3 receives the first control signal S1, the input terminal is connected to the power chip 112, and the output terminal is connected to the input terminal of the fourth control switch T4 through the second resistor R2. The control terminal of switch 4 receives the third control signal S3, and its output terminal is connected to the trace on the glass substrate 120. The third series resistor circuit 163 includes a fifth control switch T5, a sixth control switch T6, and a third resistor R3. The control terminal of the fifth control switch T5 receives the fourth control signal S4, its input terminal is connected to the power chip 112, and its output terminal is connected to the input terminal of the sixth control switch T6 through the third resistor R3. The control terminal of the sixth control switch T6 receives the second control signal S2, and its output terminal is connected to the trace on the glass substrate 120. The fourth series resistor circuit 164 includes a seventh control switch T7, an eighth control switch T8, and a fourth resistor R4. The control terminal of the seventh control switch T7 receives the fourth control signal S4, its input terminal is connected to the power chip 112, and its output terminal is connected to the input terminal of the eighth control switch T8 through the fourth resistor R4. The control terminal of the eighth control switch T8 receives the third control signal S3, and its output terminal is connected to the trace on the glass substrate 120. The resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 increase sequentially.

[0039] Referring to Figures 2 to 4, the first control signal S1 and the fourth control signal S4 are a set of inverted control signals, and the second control signal S2 and the third control signal S3 are a set of inverted control signals. The first control signal S1, the second control signal S2, the third control signal S3, and the fourth control signal S4 control the corresponding control switches to conduct for a duration of 1 / n of the pixel charging time, where n is a natural number greater than or equal to 8 and less than or equal to 15. The bit data corresponding to the control signals can be seen in Figure 3. With a fixed charging time, it is only necessary to change the current magnitude within a certain time period. If the unit time... With a constant voltage difference, to reduce the peak current, the resistance needs to be increased. Therefore, the role of the series resistor is to impede the sudden surge in current change (as shown in Figure 4), allowing it to rise slowly. Once the rise is complete, the series resistor is removed, and the normal mode is restored. If it is continuously connected in series, it will increase the power consumption of the entire circuit. However, if it is only for a moment, the increased power consumption can be ignored. The timing of the series connection can be referred to Figure 3. At the moment of switching, when the gray level is low, the 2-bit control is 0101, and R1 is selected for series connection. When the gray level increases, 0110 is selected, and R2 is selected for series connection. This method is applicable whether the gray level is increasing from low to high or switching from high to low gray level.

[0040] Voltage differences are typically represented by grayscale values. If the grayscale difference is within 20 grayscale levels, the current output by the power chip 112 is not processed. If the grayscale difference is between 21 and 100 grayscale levels, the first series resistor circuit 161 is connected. The first control signal S1 and the second control signal S2 control the first control switch T1 and the second control switch T2 to conduct. The current output by the power chip 112 is modified after passing through the first resistor R1 and output to the traces on the glass substrate 120, ultimately being input to the display panel 200. If the grayscale difference is between 101 and 150 grayscale levels, the second series resistor circuit 162 is connected. The first control signal S1 and the third control signal S3 control the third control switch T3 and the fourth control switch T4 to conduct. The current output by the power chip 112 is modified after passing through the second resistor R2 and output to the traces on the glass substrate 120, ultimately being input to the display panel 200. If the grayscale difference is between 151 and 200 grayscale levels, the third series resistor circuit 163 is connected. The second control signal S2 and the fourth control signal S4 control the fifth control switch T5 and the sixth control switch T6 to conduct. The current output by the power chip 112 is changed after passing through the third resistor R3 to be output to the traces of the glass substrate 120 and finally input to the display panel 200. If the grayscale difference is between 201 and 250 grayscale levels, the fourth series resistor circuit 164 is connected. The third control signal S3 and the fourth control signal S4 control the seventh control switch T7 and the eighth control switch T8 to conduct. The current output by the power chip 112 is changed after passing through the fourth resistor R4 to be output to the traces of the glass substrate 120 and finally input to the display panel 200. According to the load size fed back by the display panel 200, the resistance value and grayscale range value in the series circuit resistor can be adjusted.

[0041] Referring to Figure 5, as a third embodiment of this application, which is a further refinement of the second embodiment described above, the driving circuit 100 further includes a current adjustment auxiliary circuit 180. The current adjustment auxiliary circuit 180 includes a current adjustment detection unit 181, a ninth control switch T9, and a fifth resistor R5. The current adjustment auxiliary circuit 180 is disposed between the series resistor circuit 160 and the traces of the glass substrate 120. The control terminal of the ninth control switch T9 is connected to the current adjustment detection unit 181, the input terminal is connected to the output terminal of the series resistor circuit 160, and the output terminal is connected to the traces of the glass substrate 120. One end of the fifth resistor R5 is connected to the series resistor circuit 160, and the other end is connected to the traces of the glass substrate 120.

[0042] The current regulation detection unit 181 detects the peak value of the regulated current. If the peak value of the current is greater than the preset value, it controls the ninth control switch T9 to open. The power chip 112 outputs current to the series resistor circuit 160 and the fifth resistor R5, thereby reaching the trace of the glass substrate 120. The current regulation detection unit 181 detects the peak value of the regulated current. If the peak value of the current is less than or equal to the preset value, it controls the ninth control switch T9 to turn on. The power chip 112 outputs current to the series resistor circuit 160 and the ninth control switch T9, thereby reaching the trace of the glass substrate 120.

[0043] This embodiment adds a current regulation detection unit 181. After the adjustment is completed in the above embodiment, further detection can be performed to determine whether the adjusted current meets the requirements. If the peak current after adjustment is still large, further adjustment is required by connecting it in series with a resistor, namely the fifth resistor R5, to further adjust the peak current.

[0044] Referring to Figure 6, as a fourth embodiment of this application, it is a further refinement of the second embodiment described above. Unlike the third embodiment, the driving circuit 100 further includes multiple current adjustment auxiliary circuits 180. Each current adjustment auxiliary circuit 180 is correspondingly disposed between the traces of each series resistor circuit 160 and the glass substrate 120. Each current adjustment auxiliary circuit 180 includes a current adjustment detection unit 181, a ninth control switch T9, and a fifth resistor R5. The current adjustment auxiliary circuit 180 is disposed between the traces of the series resistor circuit 160 and the glass substrate 120. The control terminal of the ninth control switch T9 is connected to the current adjustment detection unit 181, and its input terminal is connected to the output terminal of the series resistor circuit 160. The output terminal is connected to the trace of the glass substrate 120. One end of the fifth resistor R5 is connected to the series resistor circuit 160, and the other end is connected to the trace of the glass substrate 120. The current adjustment detection unit 181 detects the peak value of the adjusted current. If the peak value of the current is greater than the preset value, it controls the ninth control switch T9 to open. The power chip 112 outputs current to the series resistor circuit 160 and the fifth resistor R5, thereby reaching the trace of the glass substrate 120. The current adjustment detection unit 181 detects the peak value of the adjusted current. If the peak value of the current is less than or equal to the preset value, it controls the ninth control switch T9 to turn on. The power chip 112 outputs current to the series resistor circuit 160 and the ninth control switch T9, thereby reaching the trace of the glass substrate 120.

[0045] In this embodiment, a current adjustment auxiliary circuit 180 is provided after each series resistor circuit 160. The current adjustment auxiliary circuit 180 can adjust the current in conjunction with the series resistor circuit 160. For example, when the gray level difference is within the range of 20 to 100 gray levels, assuming the gray level difference is 30, the first resistor R1 is selected to be connected, and the adjusted current value meets the requirements. However, when the gray level difference is 90, if the first resistor R1 is still selected to be connected, the adjusted current may be higher than the ideal current. At this time, the fifth resistor R5 can be connected, that is, the first resistor R1 and the fifth resistor R5 are connected in series in the circuit, thereby further reducing the current, so that the adjusted current meets the requirements and is close to the ideal current.

[0046] As shown in Figure 7, as a fifth embodiment of this application, a driving method is disclosed. The driving method is used to drive the driving circuit described in any of the above embodiments. The driving circuit includes a timing control board and a glass substrate. The timing control board is provided with a current adjustment module, which includes multiple series resistor circuits. The driving method includes:

[0047] S1: Detect and calculate the voltage difference of the drive signal flowing into the data driver chip per unit time; and

[0048] S2: Based on the voltage difference and the resistance of the traces on the glass substrate, control the corresponding series resistor circuit to be connected in series to the circuit of the power chip and the glass substrate, so as to control the peak current value output by the power chip.

[0049] The resistance values ​​will differ depending on the series resistor circuit.

[0050] The voltage difference of the drive signal flowing into the data driver chip per unit time is detected and calculated. Based on the voltage difference and the resistance of the traces on the glass substrate, the corresponding series resistor circuit is controlled to be connected in series to the circuit of the power chip and the glass substrate to control the peak current value output by the power chip, so as to adjust the spike current in the power current signal and maintain the stability of the power supply and reference ground. Its ultimate purpose is to maintain the normal operation of the data driver chip and the stability of the display screen.

[0051] As shown in Figure 8, this sixth embodiment of the present application is a further refinement and improvement of the fifth embodiment described above. The voltage difference is referenced using grayscale variation values. The series resistor circuit includes four circuits: a first series resistor circuit, a second series resistor circuit, a third series resistor circuit, and a fourth series resistor circuit. The resistances of the four series resistor circuits connected in series to the circuit between the power chip and the glass substrate are respectively the first resistor, the second resistor, the third resistor, and the fourth resistor. Step S2 includes:

[0052] S21: When the grayscale change value is less than or equal to the first preset grayscale, no processing is performed on the current output by the power chip;

[0053] S22: When the grayscale change value is greater than the first preset grayscale and less than or equal to the second preset grayscale, the first series resistor circuit is turned on, connecting the first resistor in series to the circuit of the power chip and the glass substrate. When the grayscale change value is greater than the second preset grayscale and less than or equal to the third preset grayscale, the second series resistor circuit is turned on, connecting the second resistor in series to the circuit of the power chip and the glass substrate. When the grayscale change value is greater than the third preset grayscale and less than or equal to the fourth preset grayscale, the third series resistor circuit is turned on, connecting the third resistor in series to the circuit of the power chip and the glass substrate. When the grayscale change value is greater than the fourth preset grayscale and less than or equal to the fifth preset grayscale, the fourth series resistor circuit is turned on, connecting the fourth resistor in series to the circuit of the power chip and the glass substrate, so as to adjust the current output by the power chip.

[0054] In step S22, the control selector generates a corresponding control signal based on the grayscale change value, controls the corresponding series resistor circuit to turn on at the moment the driving signal changes, and turns off the series resistor circuit within a preset time; wherein, the preset time is 1 / 15 to 1 / 8 of the pixel charging time.

[0055] In this embodiment, the calculated grayscale difference is compared with a preset grayscale value. Based on the comparison result, a corresponding series resistor circuit is selected to adjust the power supply current. The values ​​of the first, second, third, fourth, and fifth preset grayscale values ​​increase sequentially, either proportionally or according to preset requirements. Considering that current spikes can be significant when the grayscale difference exceeds 20, the first preset grayscale value is set to 20, and the second, third, fourth, and fifth preset grayscale values ​​are 100, 150, 200, and 250 grayscale, respectively. If the grayscale difference is within 20 grayscale values, no processing is applied to the current output by the power chip. If the grayscale difference is between 21 and 100 grayscale values, the first series resistor circuit is connected. The first and second control signals control the first and second control switches to conduct, and the current output by the power chip is changed after passing through the first resistor to be output to the traces on the glass substrate and finally input into the display panel. If the grayscale difference is between 101 and 150 grayscale levels, a second series resistor circuit is connected. The first and third control signals control the third and fourth control switches to conduct. The current output by the power chip is changed after passing through the second resistor to be output to the traces on the glass substrate and finally input to the display panel. If the grayscale difference is between 151 and 200 grayscale levels, a third series resistor circuit is connected. The second and fourth control signals control the fifth and sixth control switches to conduct. The current output by the power chip is changed after passing through the third resistor to be output to the traces on the glass substrate and finally input to the display panel. If the grayscale difference is between 201 and 250 grayscale levels, a fourth series resistor circuit is connected. The third and fourth control signals control the seventh and eighth control switches to conduct. The current output by the power chip is changed after passing through the fourth resistor to be output to the traces on the glass substrate and finally input to the display panel. The resistance and grayscale range of the series circuit resistors can be adjusted according to the load feedback from the display panel.

[0056] As shown in Figure 9, the seventh embodiment of this application is a further refinement and improvement of the sixth embodiment described above. The driving circuit further includes a current regulation auxiliary circuit, which includes a current regulation detection unit, a ninth control switch, and a fifth resistor. After step S22, the following step is also included:

[0057] S3: Detect the peak value of the adjusted current. If the peak value of the current is greater than the preset value, control the ninth control switch to open. The power chip outputs current to the series resistor circuit and the fifth resistor, thereby reaching the trace of the glass substrate. The current adjustment detection unit detects the peak value of the adjusted current. If the peak value of the current is less than or equal to the preset value, control the ninth control switch to turn on. The power chip outputs current to the series resistor circuit and the ninth control switch, thereby reaching the trace of the glass substrate.

[0058] This embodiment adds a testing and debugging step. After completing the basic current adjustment, considering that the gray level difference is within a certain range, a fixed resistor is selected for current adjustment. However, the difference between gray levels within the gray level range is relatively large, which may lead to inaccurate current adjustment of the latter. Therefore, a current adjustment auxiliary circuit is added to further test and determine whether the adjusted current meets the requirements. If the peak current after adjustment is still large, further adjustment is required by connecting it in series with another resistor, namely the fifth resistor, to further adjust the peak current.

[0059] As shown in FIG10, as the eighth embodiment of this application, a display device 300 is disclosed. The display device 300 includes a driving circuit 100 and a display panel 200 as described in any of the above embodiments. The driving circuit 100 drives the display panel 200 using the driving method described in the above embodiments.

[0060] Referring to Figures 1 and 10, this application uses a glass substrate 120 as a circuit board for routing traces. Based on the voltage change value of the data line 210 and the resistance value of the traces on the glass substrate 120, the current pre-input to the data line 210 is adjusted. The load calculation module 140 judges the load, such as the voltage difference. If the difference is within the range, no processing is done. If the difference is large, it means that the instantaneous current will increase. Then the control selector 170 selects the corresponding series resistor circuit 160 in the series-connected trace loop to adjust the peak current. This avoids severe load withdrawal, which would affect the power supply current and GND, causing abnormal gamma voltage level. Moreover, it does not require additional current changing circuits or voltage changing circuits to adjust the power supply voltage. It can compensate for the instantaneous load withdrawal problem of each voltage source, thereby solving the problem of large instantaneous current withdrawal during light and heavy load switching, maintaining the stability of the power supply and GND, and avoiding the problem caused by excessive current and voltage fluctuations in the power supply, which would lead to abnormal gamma voltage level.

[0061] It should be noted that the limitations on the steps involved in this solution, without affecting the implementation of the specific solution, are not considered as limiting the order of the steps. That is, the steps listed first can be performed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the protection scope of this application. The inventive concept of this application can form many embodiments, but due to space limitations in the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. The combination of embodiments or technical features will enhance the original technical effect.

[0062] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A drive circuit for driving a display panel to display, wherein, The driving circuit includes: The timing control board includes a timing control chip and a power supply chip. The timing control chip outputs a drive signal, and the power supply chip outputs a power supply current signal. The glass substrate has multiple traces connected to the timing control board to receive drive signals and power current signals. The data driver chip is connected to the traces on the glass substrate, receives the drive signals and power current signals transmitted by the traces, and generates corresponding data signals to output to the data line. A load calculation module is used to detect and calculate the voltage difference of the drive signal flowing into the data driver chip per unit time; and A current regulation module is mounted on the timing control board and connected to the power chip; The current regulation module includes multiple series resistor circuits connected in series with the power chip and a control selector. The control selector controls the connection to the corresponding series resistor circuit based on the voltage difference of the load calculation module and the resistance of the traces on the glass substrate, so as to control the peak current value output by the power chip.

2. The drive circuit of claim 1, wherein, At least two series resistor circuits are provided. Each series resistor circuit has two control switches and one resistor. The resistor in each series resistor circuit is set between the two control switches. The control terminals of the two control switches are respectively connected to a control selector. The control selector outputs different control signals to the two control switches in each series resistor circuit according to the voltage difference calculated by the load calculation module, so as to control the corresponding series resistor circuit to be connected in series to the circuit of the power chip and the glass substrate.

3. The drive circuit of claim 2, wherein, The series resistor circuit is provided with four circuits, namely the first series resistor circuit, the second series resistor circuit, the third series resistor circuit, and the fourth series resistor circuit. The control selector outputs different control signals to two control switches in each series resistor circuit according to the voltage difference calculated by the load calculation module, so as to control the corresponding series resistor circuit to be connected in series to the circuit of the power chip and the glass substrate.

4. The drive circuit of claim 2, wherein, The first series resistor circuit includes a first control switch, a second control switch, and a first resistor. The control terminal of the first control switch receives a first control signal, the input terminal is connected to a power chip, and the output terminal is connected to the input terminal of the second control switch through the first resistor. The control terminal of the second control switch receives a second control signal, and the output terminal is connected to a trace on the glass substrate. The second series resistor circuit includes a third control switch, a fourth control switch, and a second resistor. The control terminal of the third control switch receives a first control signal, the input terminal is connected to a power chip, and the output terminal is connected to the input terminal of the fourth control switch through the second resistor. The control terminal of the fourth control switch receives a third control signal, and the output terminal is connected to the trace on the glass substrate. The third series resistor circuit includes a fifth control switch, a sixth control switch, and a third resistor. The control terminal of the fifth control switch receives a fourth control signal, the input terminal is connected to the power chip, and the output terminal is connected to the input terminal of the sixth control switch through the third resistor. The control terminal of the sixth control switch receives a second control signal, and the output terminal is connected to the trace on the glass substrate. The fourth series resistor circuit includes a seventh control switch, an eighth control switch, and a fourth resistor. The control terminal of the seventh control switch receives a fourth control signal, its input terminal is connected to a power chip, and its output terminal is connected to the input terminal of the eighth control switch through the fourth resistor. The control terminal of the eighth control switch receives a third control signal, and its output terminal is connected to the traces on the glass substrate.

5. The drive circuit of claim 4, wherein, The first control signal and the fourth control signal are a set of inverted control signals, and the second control signal and the third control signal are a set of inverted control signals. The first control signal, the second control signal, the third control signal and the fourth control signal control the corresponding control switch to conduct for a duration of 1 / n of the pixel charging time, where n is a natural number greater than or equal to 8 and less than or equal to 15.

6. The drive circuit of claim 4, wherein, The resistance values ​​of the first resistor, the second resistor, the third resistor, and the fourth resistor increase sequentially.

7. The drive circuit of claim 2, wherein, The driving circuit further includes a current regulation auxiliary circuit, which includes a current regulation detection unit, a ninth control switch, and a fifth resistor. The current regulation auxiliary circuit is disposed between the series resistor circuit and the traces of the glass substrate. The control terminal of the ninth control switch is connected to the current regulation detection unit, the input terminal is connected to the output terminal of the series resistor circuit, and the output terminal is connected to the traces of the glass substrate. One end of the fifth resistor is connected to the series resistor circuit, and the other end is connected to the traces of the glass substrate. The current regulation detection unit detects the peak value of the regulated current. If the peak value of the current is greater than the preset value, it controls the ninth control switch to open, and the power chip outputs current to the series resistor circuit and the fifth resistor to reach the traces of the glass substrate. The current regulation detection unit detects the peak value of the regulated current. If the peak value of the current is less than or equal to the preset value, it controls the ninth control switch to turn on, and the power chip outputs current to the series resistor circuit and the ninth control switch to reach the traces of the glass substrate.

8. The drive circuit of claim 2, wherein, The driving circuit also includes multiple current regulation auxiliary circuits. Each current regulation auxiliary circuit is correspondingly disposed between each series resistor circuit and the trace of the glass substrate. Each current regulation auxiliary circuit includes a current regulation detection unit, a ninth control switch and a fifth resistor. The current regulation auxiliary circuit is disposed between the series resistor circuit and the trace of the glass substrate. The control terminal of the ninth control switch is connected to the current regulation detection unit, the input terminal is connected to the output terminal of the series resistor circuit, and the output terminal is connected to the trace of the glass substrate. One end of the fifth resistor is connected to the series resistor circuit and the other end is connected to the trace of the glass substrate. The current regulation detection unit detects the peak value of the regulated current. If the peak value of the current is greater than the preset value, it controls the ninth control switch to open, and the power chip outputs current to the series resistor circuit and the fifth resistor to reach the traces of the glass substrate. The current regulation detection unit detects the peak value of the regulated current. If the peak value of the current is less than or equal to the preset value, it controls the ninth control switch to turn on, and the power chip outputs current to the series resistor circuit and the ninth control switch to reach the traces of the glass substrate.

9. The drive circuit of claim 6, wherein, Adjust the resistance and grayscale range of the series circuit resistor based on the load feedback from the display panel.

10. A driving method, wherein, The driving method is used to drive a circuit, the driving circuit including a timing control board and a glass substrate, the timing control board being provided with a current adjustment module, the current adjustment module including multiple series resistor circuits, and the driving method including: Detect and calculate the voltage difference of the drive signal flowing into the data driver chip per unit time; and Based on the voltage difference and the resistance of the traces on the glass substrate, the corresponding series resistor circuit is connected in series to the circuit of the power chip and the glass substrate to control the peak current value output by the power chip. The resistance values ​​will differ depending on the series resistor circuit.

11. The driving method of claim 10, wherein, The voltage difference is a grayscale variation value. The series resistor circuit has four series resistor circuits: a first series resistor circuit, a second series resistor circuit, a third series resistor circuit, and a fourth series resistor circuit. The loop resistances of the four series resistor circuits connected in series to the power chip and the glass substrate are the first resistor, the second resistor, the third resistor, and the fourth resistor, respectively. The step of controlling the corresponding series resistor circuit connected in series to the power chip and the glass substrate according to the voltage difference and the resistance value of the traces on the glass substrate to control the peak current value output by the power chip includes: When the grayscale change value is less than or equal to the first preset grayscale, the current output by the power chip is not processed. When the grayscale change value is greater than the first preset grayscale and less than or equal to the second preset grayscale, the first series resistor circuit is activated, connecting the first resistor in series to the circuit of the power chip and the glass substrate. When the grayscale change value is greater than the second preset grayscale and less than or equal to the third preset grayscale, the second series resistor circuit is activated, connecting the second resistor in series to the circuit of the power chip and the glass substrate. When the grayscale change value is greater than the third preset grayscale and less than or equal to the fourth preset grayscale, the third series resistor circuit is activated, connecting the third resistor in series to the circuit of the power chip and the glass substrate. When the grayscale change value is greater than the fourth preset grayscale and less than or equal to the fifth preset grayscale, the fourth series resistor circuit is activated, connecting the fourth resistor in series to the circuit of the power chip and the glass substrate, thereby adjusting the current output by the power chip.

12. The driving method of claim 11, wherein, The steps for adjusting the output current of the power chip include: when the grayscale change value is greater than a first preset grayscale and less than or equal to a second preset grayscale, the first series resistor circuit is activated, connecting the first resistor in series to the circuit of the power chip and the glass substrate; when the grayscale change value is greater than the second preset grayscale and less than or equal to a third preset grayscale, the second series resistor circuit is activated, connecting the second resistor in series to the circuit of the power chip and the glass substrate; when the grayscale change value is greater than the third preset grayscale and less than or equal to a fourth preset grayscale, the third series resistor circuit is activated, connecting the third resistor in series to the circuit of the power chip and the glass substrate; and when the grayscale change value is greater than the fourth preset grayscale and less than or equal to a fifth preset grayscale, the fourth series resistor circuit is activated, connecting the fourth resistor in series to the circuit of the power chip and the glass substrate. Based on the grayscale change value, a corresponding control signal is generated. At the moment the drive signal changes, the corresponding series resistor circuit is turned on and turned off within a preset time. The preset time is 1 / 15 to 1 / 8 of the pixel charging time.

13. The driving method of claim 11, wherein, The driving circuit further includes a current adjustment auxiliary circuit, which includes a current adjustment detection unit, a ninth control switch, and a fifth resistor. After the step of adjusting the output current of the power chip, the circuit further includes the following steps: When the grayscale change value is greater than a first preset grayscale and less than or equal to a second preset grayscale, the first series resistor circuit is activated, connecting the first resistor in series to the circuit of the power chip and the glass substrate; when the grayscale change value is greater than the second preset grayscale and less than or equal to a third preset grayscale, the second series resistor circuit is activated, connecting the second resistor in series to the circuit of the power chip and the glass substrate; when the grayscale change value is greater than the third preset grayscale and less than or equal to a fourth preset grayscale, the third series resistor circuit is activated, connecting the third resistor in series to the circuit of the power chip and the glass substrate; when the grayscale change value is greater than the fourth preset grayscale and less than or equal to a fifth preset grayscale, the fourth series resistor circuit is activated, connecting the fourth resistor in series to the circuit of the power chip and the glass substrate. The peak current after adjustment is detected. If the peak current is greater than the preset value, the ninth control switch is turned off, and the power chip outputs current to the series resistor circuit and the fifth resistor, thereby reaching the traces of the glass substrate. If the peak current is less than or equal to the preset value, the ninth control switch is turned on, and the power chip outputs current to the series resistor circuit and the ninth control switch, thereby reaching the traces of the glass substrate.

14. The driving method of claim 11, wherein, The values ​​of the first preset grayscale, the second preset grayscale, the third preset grayscale, the fourth preset grayscale, and the fifth preset grayscale increase proportionally in sequence.

15. The driving method of claim 11, wherein, The values ​​of the second, third, fourth, and fifth preset gray levels increase proportionally in sequence, and the value of the first preset gray level is 20 gray levels.

16. A display device comprising: The display device includes a driving circuit and a display panel. The driving circuit is used to drive the display panel and includes: The timing control board includes a timing control chip and a power supply chip. The timing control chip outputs a drive signal, and the power supply chip outputs a power supply current signal. The glass substrate has multiple traces connected to the timing control board to receive drive signals and power current signals. The data driver chip is connected to the traces on the glass substrate, receives the drive signals and power current signals transmitted by the traces, and generates corresponding data signals to output to the data line. A load calculation module is used to detect and calculate the voltage difference of the drive signal flowing into the data driver chip per unit time; and A current regulation module is mounted on the timing control board and connected to the power chip; The current regulation module includes multiple series resistor circuits connected in series with the power chip and a control selector. The control selector controls the connection to the corresponding series resistor circuit based on the voltage difference of the load calculation module and the resistance of the traces on the glass substrate, so as to control the peak current value output by the power chip.

17. The display device of claim 16, wherein, At least two series resistor circuits are provided. Each series resistor circuit has two control switches and one resistor. The resistor in each series resistor circuit is set between the two control switches. The control terminals of the two control switches are respectively connected to a control selector. The control selector outputs different control signals to the two control switches in each series resistor circuit according to the voltage difference calculated by the load calculation module, so as to control the corresponding series resistor circuit to be connected in series to the circuit of the power chip and the glass substrate. The timing of the series resistor circuit being connected to the loop is chosen at the instant of signal switching to prevent a sudden surge in the instantaneous change in current, allowing the power supply output current to rise slowly. Once the rise is complete, the series resistor is removed, and the normal mode is restored.

18. The display device of claim 16, wherein, The series resistor circuit is provided with four circuits, namely the first series resistor circuit, the second series resistor circuit, the third series resistor circuit and the fourth series resistor circuit. The first series resistor circuit includes a first control switch, a second control switch, and a first resistor. The control terminal of the first control switch receives a first control signal, the input terminal is connected to a power chip, and the output terminal is connected to the input terminal of the second control switch through the first resistor. The control terminal of the second control switch receives a second control signal, and the output terminal is connected to a trace on the glass substrate. The second series resistor circuit includes a third control switch, a fourth control switch, and a second resistor. The control terminal of the third control switch receives a first control signal, the input terminal is connected to a power chip, and the output terminal is connected to the input terminal of the fourth control switch through the second resistor. The control terminal of the fourth control switch receives a third control signal, and the output terminal is connected to the trace on the glass substrate. The third series resistor circuit includes a fifth control switch, a sixth control switch, and a third resistor. The control terminal of the fifth control switch receives a fourth control signal, the input terminal is connected to the power chip, and the output terminal is connected to the input terminal of the sixth control switch through the third resistor. The control terminal of the sixth control switch receives a second control signal, and the output terminal is connected to the trace on the glass substrate. The fourth series resistor circuit includes a seventh control switch, an eighth control switch, and a fourth resistor. The control terminal of the seventh control switch receives a fourth control signal, the input terminal is connected to the power chip, and the output terminal is connected to the input terminal of the eighth control switch through the fourth resistor. The control terminal of the eighth control switch receives a third control signal, and the output terminal is connected to the trace on the glass substrate. Wherein, the first control signal and the fourth control signal are a set of inverted control signals, the second control signal and the third control signal are a set of inverted control signals, and the first control signal, the second control signal, the third control signal and the fourth control signal control the conduction time of the corresponding control switch to be 1 / n of the pixel charging time, where n is a natural number greater than or equal to 8 and less than or equal to 15; the resistance values ​​of the first resistor, the second resistor, the third resistor and the fourth resistor increase sequentially.

19. The display device of claim 16, wherein, The driving circuit also includes multiple current regulation auxiliary circuits. Each current regulation auxiliary circuit is correspondingly disposed between each series resistor circuit and the trace of the glass substrate. Each current regulation auxiliary circuit includes a current regulation detection unit, a ninth control switch and a fifth resistor. The current regulation auxiliary circuit is disposed between the series resistor circuit and the trace of the glass substrate. The control terminal of the ninth control switch is connected to the current regulation detection unit, the input terminal is connected to the output terminal of the series resistor circuit, and the output terminal is connected to the trace of the glass substrate. One end of the fifth resistor is connected to the series resistor circuit and the other end is connected to the trace of the glass substrate. The current regulation detection unit detects the peak value of the regulated current. If the peak value of the current is greater than the preset value, it controls the ninth control switch to open, and the power chip outputs current to the series resistor circuit and the fifth resistor to reach the traces of the glass substrate. The current regulation detection unit detects the peak value of the regulated current. If the peak value of the current is less than or equal to the preset value, it controls the ninth control switch to turn on, and the power chip outputs current to the series resistor circuit and the ninth control switch to reach the traces of the glass substrate.

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