Display device driving method and display device

Abstract

The present application discloses a driving method for a display device and a display device, the driving method comprising: predicting the voltage change value of a data line in a display panel; obtaining the resistance value of a wiring on a glass substrate; determining whether to perform graded adjustment on a target data voltage pre-inputted to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate; when the voltage change value is greater than or equal to a preset value, graded adjustment of the data voltage on the data line according to a preset graded rule and inputting it to the data line for driving; when the voltage change value is less than a preset value, directly outputting the target data voltage pre-inputted to the data line to the data line for driving. The present application graded adjustment of the data voltage pre-inputted to the data line according to the voltage change value of the data line and the resistance value of the wiring on the glass substrate avoids excessive voltage difference before and after the data line, resulting in severe extraction, thereby affecting the power supply voltage, causing abnormal gamma voltage level, and affecting the display effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a driving method for a display device and a display device. Background Art

[0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display, thin film transistor-liquid crystal display) as a flat panel display device, because it has small volume, low power consumption, no radiation and relatively low production cost and other characteristics, and is increasingly used in the field of high performance display. When TFT-LCD is displayed, the gate line of each row on the display panel is scanned line by line to open the pixel unit connected with the row gate line, and the data line outputs the data signal to the pixel unit that is turned on, and the pixel unit is charged. The deflection angle of the liquid crystal corresponding to the pixel unit charged with different electric quantities is also different, so that pictures of different gray scales can be displayed. In order to further reduce the production cost of liquid crystal display products, the existing circuit for scanning the gate line often adopts G0A (Gate Driver on Array, array substrate row drive) design to integrate TFT (Thin Film Transistor, thin film field effect transistor) gate switch circuit on the array substrate of the display panel to form a scan drive to the display panel. This gate switch circuit integrated on the array substrate using GOA technology is also called GOA unit or shift register unit. The display device using the GOA unit can reduce product costs in terms of both material cost and manufacturing process because the part of the binding driving circuit is omitted.

[0003] In addition to designing GOA, there is now another new trend of solution to reduce the cost of panels, namely glass substrates. In addition to being used for CELL design, glass substrates also have glass-based backlight design and glass PCB design. However, due to the large impedance and lack of capacitance on the glass substrate, the power supply voltage is instantly loaded, affecting the stability of GND, and thus the stability of all power supplies and voltages. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a driving method and a display device that can improve the display device with large load changes causing large instantaneous power supply voltage draw and reduced stability.

[0005] The present application discloses a driving method for a display device, wherein the display device comprises a display panel and a driving module, wherein the driving module comprises a timing control board and a glass substrate, wherein the timing control board outputs a driving signal and a power supply signal to a wiring of the glass substrate to output to the display panel, and the driving method comprises:

[0006] Predicting voltage change values ​​of data lines in a display panel;

[0007] Obtain the resistance value of the trace on the glass substrate;

[0008] Determining whether to perform graded adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate;

[0009] When the voltage change value is greater than or equal to the preset value, the data voltage on the data line is adjusted in a graded manner according to the preset grading rules, and multiple graded data voltages are generated and input into the data line for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rules.

[0010] Optionally, the voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes:

[0011] Obtaining grayscale values ​​of data voltages corresponding to pixels in a current row and pixels in a next row on a current data line in a display panel in a current frame, and calculating a difference to obtain a grayscale change value;

[0012] The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises:

[0013] Determine whether to perform hierarchical adjustment on the data voltage corresponding to the next row of pixels on the current data line according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table;

[0014] The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises:

[0015] When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is graded according to the first lookup table, and multiple graded data voltages are generated according to the grayscale values ​​and input into the next row of pixels on the current data line for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving.

[0016] Optionally, the voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes:

[0017] In the current frame, the grayscale value of the data voltage of the current data line in the display panel corresponding to the display time and the blanking time is obtained, and the difference is calculated to obtain the grayscale change value;

[0018] The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises:

[0019] Determine whether to perform hierarchical adjustment on the data voltage within the blanking time according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table;

[0020] The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises:

[0021] When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in stages according to the first lookup table during the blanking time, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving during the blanking time;

[0022] The data voltage corresponding to the display time is the data voltage corresponding to the last row of pixels scanned.

[0023] Optionally, the voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes:

[0024] Obtaining grayscale values ​​of data voltages corresponding to pixels in a current row on a current data line of a current frame and pixels in a current row on a current data line of a next frame in the display panel, and calculating a difference to obtain a grayscale change value;

[0025] The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises:

[0026] Determine whether to perform hierarchical adjustment on the data voltage corresponding to the current row of pixels on the current data line of the next frame according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table;

[0027] The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises:

[0028] When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the current row of pixels on the current data line of the next frame is graded according to the first lookup table, and multiple graded data voltages are generated according to the grayscale values ​​and input into the current row of pixels on the current data line of the next frame for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the current row of pixels on the current data line of the next frame is directly output to the data line for driving.

[0029] Optionally, a plurality of first lookup tables are provided, each of which is set according to the average resistance of the wiring on the glass substrate. When the average resistance is R1, if the grayscale change value is less than the first preset grayscale value, no graded adjustment is performed; when the grayscale change value is greater than the first preset grayscale value and less than or equal to twice the first preset grayscale value, two-stage adjustment is performed; when the grayscale change value is greater than twice the first preset grayscale value and less than three times the first preset grayscale value, three-stage adjustment is performed, and so on;

[0030] When the average resistance is R2, if the grayscale change value is less than the second preset grayscale value, no graded adjustment is performed; when the grayscale change value is greater than the second preset grayscale value and less than or equal to twice the second preset grayscale value, two-grade adjustment is performed; when the absolute value of the grayscale change value is greater than twice the second preset grayscale value and less than three times the second preset grayscale value, three-grade adjustment is performed, and so on;

[0031] Wherein, R1 is any resistance value within the first resistance range, R2 is any resistance value within the second resistance range, R2=(1.5 ~ 2.5)R1, and the first preset grayscale value is 1.25 times to 1.5 times the second preset grayscale value.

[0032] Optionally, when the grayscale change value is greater than or equal to a preset value, the charging time corresponding to the pixel of the data voltage to be adjusted includes a first charging time and a second charging time, during the first charging time, the data voltage on the data line is graded from the first data voltage when the previous pixel is charged to the second data voltage, during the second charging time, the second data voltage is continuously output from the data line to the pixel of the data voltage to be adjusted;

[0033] The ratio of the duration of the first charging time to the duration of the second charging time is less than or equal to one fifth, and the duration of the first charging time is set according to the peak moment of the analog voltage of the power signal.

[0034] Optionally, when the first preset grayscale value is 50 grays and the data voltage of the pixel to be adjusted is greater than the data voltage of the previous pixel, if the grayscale value change is 255 grays, the voltage boost adjustment is performed in six levels, and the data voltage of the last level is greater than the data voltage corresponding to 255 grays. After the adjustment is completed, the data voltage of the last level is continuously input to charge the pixel to be adjusted.

[0035] Optionally, the display device includes an aging test module, the aging test module tests the aging test degree of the display panel and provides an aging value of the display panel, the voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes:

[0036] Obtaining grayscale values ​​of data voltages corresponding to pixels in a current row and pixels in a next row on a current data line in a display panel in a current frame, and calculating a difference to obtain a grayscale change value;

[0037] The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises:

[0038] According to the grayscale change value, the resistance value of the wiring on the glass substrate, and the aging value of the display panel, the data voltage corresponding to the next row of pixels on the current data line is adjusted in stages;

[0039] The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises:

[0040] When the grayscale change value is greater than or equal to the preset value, and the aging value is less than the preset aging value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in a hierarchical manner according to the preset first grading rule, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving;

[0041] When the grayscale change value is greater than or equal to the preset value, and the aging value is greater than or equal to the preset aging value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in a hierarchical manner according to the preset second grading rule, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving;

[0042] When the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving.

[0043] The present application also discloses a display device, which is driven using any of the driving methods described above. The display device includes a driving module and a display panel. The driving module includes a timing control board and a glass substrate. The timing control board outputs a driving signal and a power supply signal to the wiring of the glass substrate to output to the display panel. The display device also includes a source driver chip. The timing control board includes a storage and a logic judgment module. The storage stores the resistance value and data information of the wiring on the glass substrate. The logic judgment module determines whether to perform graded adjustment on the target data voltage pre-input to the data line according to the resistance value and data information of the wiring on the glass substrate. The source driver chip generates a corresponding data voltage according to the judgment result of the logic judgment module, and outputs it to the data line of the display panel for driving.

[0044] Optionally, a first lookup table is stored in the storage, and the logic judgment module determines whether to perform graded adjustment on the data voltage corresponding to the next row of pixels on the current data line according to the grayscale change value and the resistance of the wiring on the glass substrate, as well as the first lookup table, so as to control the source driver chip to generate a corresponding data voltage, which is output to the data line of the display panel for driving.

[0045] The present application uses a glass substrate as a circuit board for laying out wiring, and graded adjustment is performed on the data voltage pre-input to the data line according to the voltage change value of the data line and the resistance value of the wiring on the glass substrate. When the voltage change value is greater than or equal to a preset value, the data voltage on the data line is graded and adjusted according to a preset grading rule, and a plurality of graded data voltages are generated and respectively input to the data line for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rule, so as to avoid excessive voltage difference before and after the data line, resulting in serious drawback, thereby affecting the power supply voltage and causing abnormal gamma voltage level, and there is no need to set up an additional current changing circuit or voltage changing circuit to adjust the power supply voltage, so as to compensate for the instantaneous drawback problem of each voltage source, thereby solving the problem of large instantaneous current drawback during light-heavy load switching, and maintaining the stability of the power supply and GND. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0047] Figure 1 is a schematic flow chart of a driving method according to a first embodiment of the present application;

[0048] Figure 2 is a schematic diagram of an exemplary power supply voltage and current signal waveform of the present application;

[0049] Figure 3 is a schematic flow chart of a driving method according to a second embodiment of the present application;

[0050] Figure 4 is a schematic diagram of the power supply voltage and current signal waveforms before and after the improvement of the second embodiment of the present application;

[0051] Figure 5 is a schematic flow chart of a driving method according to a third embodiment of the present application;

[0052] Figure 6 is a schematic flow chart of a driving method according to a fourth embodiment of the present application;

[0053] Figure 7 is a schematic flow chart of a driving method according to a fifth embodiment of the present application;

[0054] Figure 8 It is a schematic structural diagram of a display device according to the sixth embodiment of the present application.

[0055] Among them, 100, display device; 200, display panel; 210, data line; 220, pixel; 230, aging test module; 300, driving module; 310, glass substrate; 320, timing control board; 321, storage; 322, logic judgment module; 323, first lookup table; 330, source driver chip. DETAILED DESCRIPTION

[0056] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0057] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0058] refer to Figure 1 As shown, as the first embodiment of the present application, in order to solve the instability of power supply voltage caused by large load changes, a driving method of a display device is disclosed, the display device includes a display panel and a driving module, the driving module includes a timing control board and a glass substrate, the timing control board outputs a driving signal and a power supply signal to the wiring of the glass substrate to output to the display panel, the driving method includes:

[0059] S1: predicting the voltage change value of the data line in the display panel;

[0060] S2: Obtain the resistance value of the trace on the glass substrate;

[0061] S3: determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate;

[0062] S4: When the voltage change value is greater than or equal to the preset value, the data voltage on the data line is adjusted in a graded manner according to the preset grading rules, and a plurality of graded data voltages are generated and respectively input to the data line for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rules.

[0063] refer to Figure 2 As shown, the actual voltage test diagram of light load switching to heavy load when the glass substrate is used as the PCB between the timing control board of the display device and the flip chip film. The blue is the voltage waveform of the simulated power supply VAA, the green is the current waveform of the simulated power supply VAA, and the orange is the voltage waveform of GND. Under normal circumstances, VAA is a stable voltage source waveform with almost invisible voltage fluctuations, and GND is the 0-level reference voltage. At the moment of screen switching, the current required by the back-end load suddenly increases, but the power IC cannot react so quickly at this time, and the power provided is constant, so the VAA voltage suddenly drops to the voltage of V1 (less than VAA), and the VAA current suddenly reaches I1. In the extremely short time before and after this change, the power before the change = the power after the change, so there is Iaa*VAA voltage ≈ I1*V1, and the subsequent power supply adjusts the output to make the VAA voltage return to the standard voltage, and Iaa outputs the current according to the actual demand; because of this instantaneous load withdrawal, the presence of routing impedance and parasitic inductance of GND, when the circuit switch is suddenly disconnected or opened, an overvoltage will be generated inside, resulting in a spike current in the circuit in a short period of time, and the GND voltage of the glass PCB will also increase instantly; based on this, the application first predicts the voltage change value of the data line in the display panel, and connects the data line The difference between the pixel changes before and after on the glass substrate is determined, and then according to the voltage change value and the resistance of the wiring on the glass substrate, it is determined whether to perform graded adjustment on the target data voltage pre-input to the data line; when the voltage change value is greater than or equal to the preset value, the data voltage on the data line is graded and adjusted according to the preset grading rules, and a plurality of graded data voltages are generated and respectively input to the data line for driving, that is, graded adjustment is performed on the basis of the data voltage that has been output, instead of directly outputting the data voltage of the data line of the pre-output value, so as to avoid excessive voltage difference between the data voltages before and after; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rules, without worrying about the problem of unstable power supply voltage caused by excessive voltage difference, and avoiding the problem that the VAA voltage fluctuation is too large, which causes abnormal Gamma voltage level.

[0064] like Figure 3 As shown, as the second embodiment of the present application, it is a further refinement and improvement of the above first embodiment, the voltage change value includes a grayscale change value, and the step S1 includes:

[0065] S11: obtaining grayscale values ​​of data voltages corresponding to pixels in a current row and pixels in a next row on a current data line in a display panel in a current frame, and calculating a difference to obtain a grayscale change value;

[0066] The step S3 comprises:

[0067] S31: determining whether to perform hierarchical adjustment on the data voltage corresponding to the next row of pixels on the current data line according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table;

[0068] The step S4 comprises:

[0069] S41: When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in a graded manner according to the first lookup table, and multiple graded data voltages are generated according to the grayscale values ​​and inputted into the next row of pixels on the current data line for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly outputted to the data line for driving.

[0070] This embodiment takes the change of data voltages of two adjacent pixels on a data line as an example for illustration. In the current frame, the grayscale values ​​of the data voltages corresponding to the current row of pixels and the next row of pixels on the current data line in the display panel are obtained, and the difference is calculated to obtain the grayscale change value. According to the grayscale change value, it is determined whether the grayscale adjustment of the data voltage is required. When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in stages according to the first lookup table. According to the grayscale value, a plurality of data voltages after being graded are generated and inputted to the next row of pixels on the current data line for driving respectively. When the grayscale change value is less than When the preset value is reached, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving. The preset value can be set as needed. For example, if the grayscale difference is 30, the fluctuation of the power supply voltage has little effect on the gamma voltage level and does not affect the display effect. After exceeding 30, the impact is more obvious, so the preset value can be set at 30 grays. Of course, it can also be selected according to the specific display effect. Display panels of different sizes or different types of display panels will test their respective preset values ​​through the size of abnormal changes during display, so that the preset values ​​are stored in the timing control board.

[0071] Among them, the grayscale change value is the absolute value of the difference between the previous and next grayscale values. When the previous grayscale value is greater than the next grayscale value, the data voltage is adjusted down in stages from high to low. When the previous grayscale value is less than the next grayscale value, the data voltage is adjusted up in stages from low to high. For example, when the load is small, the grayscale voltage is 100. To switch to 200 grayscale voltage, the instantaneous current is too large. When we charge normally, from 100 to 200 grayscale, the data voltage is directly given to 200 grayscale voltage after the thin film transistor TFT corresponding to the pixel is turned on. Such a difference is too large. At this time, our solution is to increase the data voltage in stages within the effective charging time (sufficient charging time), such as Figure 4 In this way, during the effective charging time, the current rises slowly and eventually reaches the target voltage level. Therefore, the voltage V2 pulled by VAA will be significantly improved compared to V1, smaller and smoother, and the peak voltage of GND will also be reduced.

[0072] In addition, if the resistance on the glass substrate, i.e., the PCB board, is different, the adjustment levels will also be different when graded adjustment is performed. The corresponding PCB resistance and grayscale change value can form a lookup table. When adjustment is required, the grayscale change value and the resistance of the wiring on the glass substrate and the first lookup table are used to determine whether to perform specific graded adjustment on the data voltage corresponding to the next row of pixels on the current data line.

[0073] Generally, the first lookup table is provided with a plurality of them, each of which is set according to the average resistance of the wiring on the glass substrate. When the average resistance is R1, if the grayscale change value is less than the first preset grayscale value, no graded adjustment is performed; when the grayscale change value is greater than the first preset grayscale value and less than or equal to twice the first preset grayscale value, two-stage adjustment is performed; when the grayscale change value is greater than twice the first preset grayscale value and less than three times the first preset grayscale value, three-stage adjustment is performed, and so on;

[0074] Specifically, taking the average resistance as R1 and the first preset grayscale value as 50 gray as an example, the first lookup table mainly includes grayscale difference values ​​and grading rules, as shown in Table 1 below:

[0075]

[0076] Table 1: First lookup table

[0077] Furthermore, when the average resistance is R2, if the grayscale change value is less than the second preset grayscale value, no graded adjustment is performed; when the grayscale change value is greater than the second preset grayscale value and is less than or equal to twice the second preset grayscale value, two-level adjustment is performed; when the absolute value of the grayscale change value is greater than twice the second preset grayscale value and is less than three times the second preset grayscale value, three-level adjustment is performed, and so on; wherein, R1 is any resistance value within the first resistance range, R2 is any resistance value within the second resistance range, R2=(1.5 ~ 2.5)R1, the first preset grayscale value is 1.25 times to 1.5 times the second preset grayscale value, different PCBs have different resistances, and different preset values ​​and different graded adjustment strategies are set according to different resistances.

[0078] In addition, different display panel sizes have different corresponding display panel loads, that is, different draw currents. For a 23.8 size, in the early stage of display panel drawing, the resistance R of the entire display panel can be simulated by software. This value is not much different from the actual value after the display panel is produced. Therefore, after knowing the display panel load size in the early stage of panel design, the benchmark rule to be used can be determined by evaluating the R size of the display panel; for example, if the display panel load loading size is 1~1.5 times the load of the display panel used as the benchmark, then we still perform graded boosting according to the benchmark table. If it is 1.5~2.5 times, the grades in the table are halved, that is, 0~25 gray is not processed, 25~50 is divided into two levels, 50 to 75 is divided into three levels, and so on. In this way, different boosting treatment methods can be implemented according to different display panel loads.

[0079] In addition, it should be noted that, considering that when the voltage is adjusted in stages, the voltage of the previous levels rises slowly, this will have a certain impact on the charging of the pixels. For example, previously the 100 grayscale directly changes to the 200 grayscale, and after changing to the 200 grayscale, the charging time requires 0.2s to ensure pixel display, but now the 100 grayscale first changes to the 150 grayscale, and then from the 150 grayscale to the 200 grayscale, and the charging time remains unchanged, resulting in insufficient charging. Therefore, in order to meet the charging capacity of the pixel, the voltage needs to be adjusted to greater than 200 grays while the charging time remains unchanged. When the first preset grayscale value is 50 grays and the data voltage of the pixel to be adjusted is greater than the data voltage of the previous pixel, if the grayscale value change value is 255 grays, it is divided into six levels of boost adjustment, and the data voltage of the last level is greater than the data voltage corresponding to the 255 grayscale. After the adjustment is completed, the data voltage of the last level is continuously input to charge the pixel to be adjusted, thereby avoiding insufficient pixel charging and affecting display.

[0080] like Figure 5As shown, as the third embodiment of the present application, different from the above second embodiment, the step S1 includes:

[0081] S11': obtaining the grayscale value of the data voltage corresponding to the display time and the blanking time of the current data line in the display panel in the current frame, and calculating the difference to obtain the grayscale change value;

[0082] The step S3 comprises:

[0083] S31': determining whether to perform hierarchical adjustment on the data voltage within the blanking time according to the gray scale change value, the resistance of the wiring on the glass substrate, and the first lookup table;

[0084] The step S4 comprises:

[0085] S41': when the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in stages according to the first lookup table within the blanking time, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving within the blanking time;

[0086] The data voltage corresponding to the display time is the data voltage corresponding to the last row of pixels scanned.

[0087] This embodiment mainly aims at the power supply voltage fluctuation caused by excessive load change during the conversion of display time and blanking time. The grayscale value of the data voltage corresponding to the display time and the blanking time of the current data line in the display panel is obtained in the current frame, and the difference is calculated to obtain the grayscale change value, and then the data voltage on the data line is upgraded and adjusted accordingly according to the grayscale change value; the upgrade adjustment rules can be adjusted according to the first lookup table in Example 2, and the specific adjustment size of each level can be adjusted after averaging the difference. For example, if the grayscale difference is 100, the first level can be adjusted by 50 grays, and the second level can be adjusted by 50 grays. Of course, it is also possible not to adjust according to the average value, and it is also possible to adjust 60 grays first and then 40 grays.

[0088] like Figure 6 As shown, as the fourth embodiment of the present application, different from the above second embodiment, the step S1 includes:

[0089] S11”: obtaining grayscale values ​​of data voltages corresponding to pixels in a current row on a current data line of a current frame and pixels in a current row on a current data line of a next frame in the display panel, and calculating a difference to obtain a grayscale change value;

[0090] The step S3 comprises:

[0091] S31”: determining whether to perform hierarchical adjustment on the data voltage corresponding to the current row of pixels on the current data line of the next frame according to the grayscale change value and the resistance value of the wiring on the glass substrate and the first lookup table;

[0092] The step S4 comprises:

[0093] S41": When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the current row of pixels on the current data line of the next frame is graded and adjusted according to the first lookup table, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the current row of pixels on the current data line of the next frame for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the current row of pixels on the current data line of the next frame is directly output to the data line for driving.

[0094] In this embodiment, the main purpose is to address the impact of excessive load changes on the same pixel when switching between previous and next frames. By obtaining the grayscale value of the data voltage corresponding to the current row pixel on the current data line of the current frame in the display panel and the current row pixel on the current data line of the next frame, the difference is calculated to obtain the grayscale change value, and then the size of the data voltage is adjusted in a graded manner according to the grayscale change value. Referring to Table 1 above, for example, if the grayscale difference is within 100 grays, it can be adjusted in two levels. For example, if the grayscale value of the data voltage corresponding to the current row pixel on the current data line of the current frame in the display panel is 0, and the grayscale value of the data voltage corresponding to the current row pixel on the current data line of the next frame is 90, then during the graded adjustment, it can be adjusted to 45 grays first and then to 90 grays. Of course, it can also be adjusted to 50 grays first and then to 90 grays. The graded adjustment can balance the above, or it can be more first and less later, such as 50 in the first level and 40 in the second level. In addition, in order to avoid insufficient pixel charging, it can also be directly adjusted to 95 grays or 100 grays during the second level adjustment.

[0095] like Figure 7 As shown, as the fifth embodiment of the present application, it is also a further refinement and improvement of the above-mentioned first embodiment or second embodiment. The display device includes an aging test module, the aging test module tests the aging test degree of the display panel and gives the aging value of the display panel, the voltage change value includes a grayscale change value, and the step S1 includes:

[0096] S161: obtaining grayscale values ​​of data voltages corresponding to pixels in a current row and pixels in a next row on a current data line in a display panel in a current frame, and calculating a difference to obtain a grayscale change value;

[0097] The step S3 comprises:

[0098] S361: adjusting the data voltage corresponding to the next row of pixels on the current data line in a graded manner according to the grayscale change value, the resistance value of the wiring on the glass substrate, and whether the aging value of the display panel is sufficient;

[0099] The step S4 comprises:

[0100] S461: When the grayscale change value is greater than or equal to the preset value, and the aging value is less than the preset aging value, grayscale values ​​corresponding to the next row of pixels on the current data line are adjusted in a hierarchical manner according to a preset first grading rule, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving;

[0101] S462: When the grayscale change value is greater than or equal to the preset value, and the aging value is greater than or equal to the preset aging value, grayscale values ​​corresponding to the next row of pixels on the current data line are adjusted in a hierarchical manner according to a preset second grading rule, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving;

[0102] S463: When the grayscale change value is less than the preset value, directly outputting the data voltage corresponding to the next row of pixels on the current data line to the data line for driving.

[0103] In this embodiment, the aging test degree of the display panel is tested by the aging test module, and an aging value of the display panel is given. The data lines with large load changes are graded and adjusted according to the aging value and the grayscale change value.

[0104] like Figure 8 As shown, as a sixth embodiment of the present application, a display device 100 is disclosed. The display device 100 is driven using the driving method described in any of the above embodiments. The display device 100 includes a driving module 300 and a display panel. The driving module 300 includes a timing control board 320 and a glass substrate 310. The timing control board 320 outputs a driving signal and a power signal to the wiring of the glass substrate 310 to output to the display panel 200. The display device 100 also includes a source driver chip. The timing control board 320 includes a storage 321 and a logic judgment module 322. The storage 321 stores the resistance value and data information of the wiring on the glass substrate 310. The logic judgment module 322 determines whether to perform graded adjustment on the target data voltage pre-input to the data line 210 according to the resistance value and data information of the wiring on the glass substrate 310. The source driver chip generates a corresponding data voltage according to the judgment result of the logic judgment module 322, and outputs it to the data line 210 of the display panel 200 for driving.

[0105] The present application uses a glass substrate 310 as a circuit board for laying out the wiring. According to the voltage change value of the data line 210 and the resistance value of the wiring on the glass substrate 310, the data voltage pre-input to the data line 210 is graded and adjusted. When the voltage change value is greater than or equal to the preset value, the data voltage on the data line 210 is graded and adjusted according to the preset grading rules, and a plurality of graded data voltages are generated and respectively input to the data line 210 for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line 210 is directly output to the data line 210 for driving according to the original rules, so as to avoid the voltage difference before and after the data line 210 being too large, resulting in serious drawback, thereby affecting the power supply voltage and causing abnormal gamma voltage level. Moreover, there is no need to set up an additional current changing circuit or a voltage changing circuit to adjust the power supply voltage, so as to compensate for the instantaneous drawback problem of each voltage source, thereby solving the problem of large instantaneous current drawback when switching between light and heavy loads, maintaining the stability of the power supply and GND, and avoiding the problem caused by excessive current and voltage fluctuations of the power supply, which causes abnormal gamma voltage level.

[0106] Furthermore, the storage 321 stores a first lookup table 323, and the logic judgment module 322 determines whether to perform graded adjustment on the data voltage corresponding to the next row of pixels on the current data line 210 according to the grayscale change value and the resistance of the wiring on the glass substrate 310, as well as the first lookup table 323, so as to control the source driver chip 330 to generate the corresponding data voltage, which is output to the data line 210 of the display panel 200 for driving; wherein, there are multiple first lookup tables 323, each of which is set according to the average resistance of the wiring on the glass substrate 310, and of course, can also be set according to the wiring with the largest resistance among all the wirings on the glass substrate 310.

[0107] In addition, the display device 100 includes an aging test module 230, which tests the aging test degree of the display panel 200 and gives an aging value of the display panel 200. The aging test degree of the display panel 200 is tested by the aging test module 230, and the aging value of the display panel 200 is given. According to the aging value and the grayscale change value, it is decided to perform graded adjustment on the data line 210 with a large load change.

[0108] It should be noted that the limitations of the various steps involved in this scheme, without affecting the implementation of the specific scheme, are not considered to limit the order of the steps, that is, the steps written in front can be executed first, or can be executed later, or even simultaneously. As long as this scheme can be implemented, it should be considered to belong to the scope of protection of this application. The inventive concept of this application can form a lot of embodiments, but the length of the application document is limited and cannot be listed one by one. Therefore, under the premise of no conflict, the various embodiments or technical features described above can be arbitrarily combined to form a new embodiment. After the various embodiments or technical features are combined, the original technical effect will be enhanced.

[0109] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A method for driving a display device, wherein the display device comprises a display panel and a driving module, wherein: The driving module includes a timing control board and a glass substrate, the timing control board outputs a driving signal and a power signal to the wiring of the glass substrate to output to the display panel, and the driving method includes: Predicting voltage change values ​​of data lines in a display panel; Obtain the resistance value of the trace on the glass substrate; Determining whether to perform graded adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate; When the voltage change value is greater than or equal to the preset value, the data voltage on the data line is adjusted in a hierarchical manner according to the preset grading rules, and a plurality of graded data voltages are generated and respectively input to the data line for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rules; The voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes: Obtaining grayscale values ​​of data voltages corresponding to pixels in a current row and pixels in a next row on a current data line in a display panel in a current frame, and calculating a difference to obtain a grayscale change value; The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises: Determine whether to perform hierarchical adjustment on the data voltage corresponding to the next row of pixels on the current data line according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table; The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises: When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is graded according to the first lookup table, and multiple graded data voltages are generated according to the grayscale values ​​and input into the next row of pixels on the current data line for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving.

2. A method for driving a display device, the display device comprising a display panel and a driving module, characterized in that: The driving module includes a timing control board and a glass substrate, the timing control board outputs a driving signal and a power signal to the wiring of the glass substrate to output to the display panel, and the driving method includes: Predicting voltage change values ​​of data lines in a display panel; Obtain the resistance value of the trace on the glass substrate; Determining whether to perform graded adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate; When the voltage change value is greater than or equal to the preset value, the data voltage on the data line is adjusted in a hierarchical manner according to the preset grading rules, and a plurality of graded data voltages are generated and respectively input to the data line for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rules; The voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes: In the current frame, the grayscale value of the data voltage of the current data line in the display panel corresponding to the display time and the blanking time is obtained, and the difference is calculated to obtain the grayscale change value; The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises: Determine whether to perform hierarchical adjustment on the data voltage within the blanking time according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table; The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises: When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in stages according to the first lookup table during the blanking time, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving during the blanking time; The data voltage corresponding to the display time is the data voltage corresponding to the last row of pixels scanned.

3. A method for driving a display device, the display device comprising a display panel and a driving module, characterized in that: The driving module includes a timing control board and a glass substrate, the timing control board outputs a driving signal and a power signal to the wiring of the glass substrate to output to the display panel, and the driving method includes: Predicting voltage change values ​​of data lines in a display panel; Obtain the resistance value of the trace on the glass substrate; Determining whether to perform graded adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate; When the voltage change value is greater than or equal to the preset value, the data voltage on the data line is adjusted in a hierarchical manner according to the preset grading rules, and a plurality of graded data voltages are generated and respectively input to the data line for driving; when the voltage change value is less than the preset value, the target data voltage pre-input to the data line is directly output to the data line for driving according to the original rules; The voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes: Obtaining grayscale values ​​of data voltages corresponding to pixels in a current row on a current data line of a current frame and pixels in a current row on a current data line of a next frame in the display panel, and calculating a difference to obtain a grayscale change value; The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises: Determine whether to perform hierarchical adjustment on the data voltage corresponding to the current row of pixels on the current data line of the next frame according to the grayscale change value, the resistance value of the wiring on the glass substrate, and the first lookup table; The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises: When the grayscale change value is greater than or equal to the preset value, the grayscale value corresponding to the current row of pixels on the current data line of the next frame is graded according to the first lookup table, and multiple graded data voltages are generated according to the grayscale values ​​and input into the current row of pixels on the current data line of the next frame for driving; when the grayscale change value is less than the preset value, the data voltage corresponding to the current row of pixels on the current data line of the next frame is directly output to the data line for driving.

4. The driving method according to any one of claims 1 to 3, characterized in that: The first lookup table is provided with a plurality of first lookup tables, each of which is set according to the average resistance of the wiring on the glass substrate. When the average resistance is R1, if the grayscale change value is less than the first preset grayscale value, no graded adjustment is performed. When the grayscale change value is greater than the first preset grayscale value and less than or equal to twice the first preset grayscale value, two-level adjustment is performed. When the grayscale change value is greater than twice the first preset grayscale value and less than three times the first preset grayscale value, three-level adjustment is performed, and so on. When the average resistance is R2, if the grayscale change value is less than the second preset grayscale value, no graded adjustment is performed; when the grayscale change value is greater than the second preset grayscale value and less than or equal to twice the second preset grayscale value, two-grade adjustment is performed; when the absolute value of the grayscale change value is greater than twice the second preset grayscale value and less than three times the second preset grayscale value, three-grade adjustment is performed, and so on; Wherein, R1 is any resistance value within the first resistance range, R2 is any resistance value within the second resistance range, R2=(1.5 ~ 2.5)R1, and the first preset grayscale value is 1.25 times to 1.5 times the second preset grayscale value.

5. The driving method according to any one of claims 1 to 3, characterized in that: When the grayscale change value is greater than or equal to the preset value, the charging time corresponding to the pixel of the data voltage to be adjusted includes a first charging time and a second charging time. During the first charging time, the data voltage on the data line is graded from the first data voltage when the previous pixel is charged to the second data voltage. During the second charging time, the second data voltage is continuously output from the data line to the pixel of the data voltage to be adjusted. The ratio of the duration of the first charging time to the duration of the second charging time is less than or equal to one fifth, and the duration of the first charging time is set according to the peak moment of the analog voltage of the power signal.

6. The driving method according to claim 4, characterized in that: The first preset grayscale value is 50 grays. When the data voltage of the pixel to be adjusted is greater than the data voltage of the previous pixel, if the grayscale value change value is 255 grays, it is divided into six levels of boost adjustment, and the data voltage of the last level is greater than the data voltage corresponding to the 255 grayscale. After the adjustment is completed, the data voltage of the last level is continuously input to charge the pixel to be adjusted.

7. The driving method according to claim 1, characterized in that: The display device includes an aging test module, the aging test module tests the aging test degree of the display panel and gives an aging value of the display panel, the voltage change value includes a grayscale change value, and the step of predicting the voltage change value of the data line in the display panel includes: Obtaining grayscale values ​​of data voltages corresponding to pixels in a current row and pixels in a next row on a current data line in a display panel in a current frame, and calculating a difference to obtain a grayscale change value; The step of determining whether to perform hierarchical adjustment on the target data voltage pre-input to the data line according to the voltage change value and the resistance value of the wiring on the glass substrate comprises: According to the grayscale change value, the resistance value of the wiring on the glass substrate, and the aging value of the display panel, the data voltage corresponding to the next row of pixels on the current data line is adjusted in stages; The step of adjusting the data voltage on the data line in a hierarchical manner according to a preset grading rule when the voltage change value is greater than or equal to a preset value, generating a plurality of graded data voltages and inputting them to the data line for driving respectively; and directly outputting the target data voltage pre-input to the data line to the data line for driving according to the original rule when the voltage change value is less than the preset value comprises: When the grayscale change value is greater than or equal to the preset value, and the aging value is less than the preset aging value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in a hierarchical manner according to the preset first grading rule, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving; When the grayscale change value is greater than or equal to the preset value, and the aging value is greater than or equal to the preset aging value, the grayscale value corresponding to the next row of pixels on the current data line is adjusted in a hierarchical manner according to the preset second grading rule, and a plurality of graded data voltages are generated according to the grayscale values ​​and respectively input to the next row of pixels on the current data line for driving; When the grayscale change value is smaller than the preset value, the data voltage corresponding to the next row of pixels on the current data line is directly output to the data line for driving.

8. A display device driven by the driving method according to any one of claims 1 to 7, characterized in that: The display device includes a driving module and a display panel, the driving module includes a timing control board and a glass substrate, the timing control board outputs a driving signal and a power supply signal to the wiring of the glass substrate to output to the display panel, the display device also includes a source driving chip, the timing control board includes a storage and a logic judgment module, the storage stores the resistance value and data information of the wiring on the glass substrate, the logic judgment module determines whether to perform graded adjustment on the target data voltage pre-input to the data line according to the resistance value and data information of the wiring on the glass substrate, and the source driving chip generates a corresponding data voltage according to the judgment result of the logic judgment module, and outputs it to the data line of the display panel for driving.

9. The display device according to claim 8, wherein: The storage device stores a first lookup table, and the logic judgment module determines whether to perform graded adjustment on the data voltage corresponding to the next row of pixels on the current data line according to the grayscale change value, the resistance of the wiring on the glass substrate, and the first lookup table, so as to control the source driver chip to generate the corresponding data voltage, which is output to the data line of the display panel for driving.

Images