Driving method, device and display device of display panel

Abstract

The application provides a display panel driving method, device and display device, and belongs to the technical field of display equipment. The driving method determines a charging end time point according to a light emission start time point of a current row line, and the charging end time point is a time point before the light emission start time point and different from the light emission start time point by a first preset time length. The driving method determines a charging start time point according to a light emission end time point of a previous row line of the current row line, and the charging start time point is a time point after the light emission end time point and different from the charging end time point by a second preset time length. That is, the light emission start time point, the light emission end time point, the first preset time length and the second preset time length of each row line can be used to control the charging of a column line at the charging start time point of each row line and end the charging of the column line at the charging end time point of each row line, so that the column line is driven after voltage compensation, the voltage of the column line can be kept the same before the light emission of each row line starts, and the problem of uneven display of picture brightness can be solved.

Description

Technical Field

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

[0002] Currently, when the display panel is driven to display by scanning line by line from top to bottom, one end of the LCD panel is closer to the source driver chip (the input end of the data signal), resulting in a smaller RC delay (resistive-capacitive delay effect) at that end, a better pixel charging rate, and a brighter display. Conversely, the other end of the LCD panel is farther from the source driver chip, resulting in a larger RC delay, a poorer pixel charging rate, and a darker display. This leads to uneven brightness across the entire display panel. Summary of the Invention

[0003] The main objective of this application is to provide a driving method, apparatus, and display device for a display panel. The aim is to improve the problem of uneven brightness display on the display panel by performing voltage compensation on the column lines before each row line begins to emit light.

[0004] To achieve the above objectives, a first aspect of this application provides a driving method for a display panel, the display panel including row lines and column lines, the row lines connecting the anode of each light-emitting diode in the row line direction, and the column lines connecting the cathode of each light-emitting diode in the column line direction; the driving method includes:

[0005] Obtain the start time of illumination of the current row line on the display panel;

[0006] Before the light emission start time of the current row line, the charging end time is the time corresponding to the time difference of the light emission start time of the current row line from the first preset time.

[0007] Obtain the end time of light emission of the previous row line of the current row line;

[0008] After the end time of the light emission of the previous row line, the time corresponding to the second preset time difference from the end time of the charging is taken as the charging start time. The sum of the first preset time and the second preset time is less than or equal to the time between the end time of the light emission of the previous row line and the start time of the light emission of the current row line.

[0009] The system controls the charging of the column line to begin at the charging start time of the current row line and ends the charging of the column line at the charging end time of the current row line, so as to drive the column line after voltage compensation.

[0010] Update the next row of the current row to the current row, and return to the step of obtaining the start time of illumination of the current row on the display panel.

[0011] In one embodiment of this application, controlling the charging of the column line at the charging start time of the current row line and ending the charging of the column line at the charging end time of the current row line includes:

[0012] Control the charging of the column line at the charging start time of the current row line;

[0013] Before the charging end time of the current row line, the voltage of the column line after charging is controlled to reach the target voltage, and then the charging to the column line is controlled to end at the charging end time.

[0014] In one embodiment of this application, determining the first preset duration includes:

[0015] Obtain the start and end times of light emission for each row of lines on the display panel;

[0016] Based on the light emission start time and light emission end time of each row, the target duration is determined, wherein the target duration is the duration between the light emission end time of the previous row and the light emission start time of the current row;

[0017] The shortest target duration is selected as the first debugging duration, and a first preset duration is determined based on the first debugging duration, wherein the first preset duration is less than the first debugging duration.

[0018] In one embodiment of this application, the second preset duration is determined based on the first preset duration, and determining the second preset duration includes:

[0019] The longest of the target durations is selected as the first target duration.

[0020] Obtain the end time of light emission of the previous target line corresponding to the first target duration and the start time of light emission of the current target line corresponding to the first target duration;

[0021] Before the light emission start time corresponding to the current target row line, the time that differs from the light emission start time of the current target row line by the first preset time is taken as the first time.

[0022] The duration between the end time of the light emission of the previous target line and the first time is used as the second debugging duration.

[0023] The second debugging time is reduced based on the charging efficiency to obtain a second preset time, which is less than or equal to the second debugging time.

[0024] In one embodiment of this application, the second debugging time is reduced according to the charging efficiency to obtain a second preset time, including:

[0025] Obtain a second target duration from the start of charging the column line to the arrival of the target voltage after charging;

[0026] When the second target duration is less than or equal to the second debugging duration, the second target duration is determined to be the second preset duration.

[0027] When the second target duration is greater than the second debugging duration, the charging efficiency is adjusted until the second target duration is less than or equal to the second debugging duration.

[0028] A second aspect of this application provides a driving device for a display panel, the display panel including row lines and column lines, the row lines connecting the anode of each light-emitting diode in the row line direction, the column lines connecting the cathode of each light-emitting diode in the column line direction, the driving device including a timing control module and a driving module, the driving module being electrically connected to the timing control module, and the driving module being electrically connected to the row lines and the column lines;

[0029] The timing control module is used to generate row drive control signals and column drive control signals based on the data to be displayed.

[0030] The driving module is used to drive the display panel according to the row driving control signal and the column driving control signal, and by applying the driving method described in any embodiment of the present application.

[0031] In one embodiment of this application, the driving module includes a row driving unit and a plurality of column driving units; the row driving unit is electrically connected to the row line, and the column driving unit is electrically connected to the column line;

[0032] The row drive unit is used to generate a row drive voltage waveform signal according to the row drive control signal sent by the timing control module and transmit it to the row line;

[0033] The column drive unit is used to generate column drive voltage waveform signals corresponding to each column line according to the column drive control signals sent by the timing control module, and transmit them to the corresponding column line. It also drives the column line after voltage compensation by charging the column line at the start of charging and stopping charging the column line at the end of charging.

[0034] In one embodiment of this application, the column drive unit includes a charging control component, which includes a timing controller, a first switch, and a power module.

[0035] The power module is connected to the first switch and is used to charge the column line when the first switch is turned on, so as to perform voltage compensation on the column line.

[0036] The timing controller is used to control the first switch to turn on and off according to the first preset duration, the second preset duration, and the start and end times of light emission for each row.

[0037] In one embodiment of this application, the timing controller is used for:

[0038] The first switch is turned on at the start of charging for each row of lines, and turned off at the end of charging for each row of lines.

[0039] A third aspect of the present application provides a display device, including a display panel and a driving device as described in the second aspect of the present application.

[0040] The driving module in the driving device drives the display panel using the driving method described in the first aspect of the embodiments of this application.

[0041] In the technical solution provided in this application embodiment, based on the light emission start time of the current row line, a time preceding the light emission start time and corresponding to a first preset time difference from the light emission start time is determined as the charging end time. After determining the charging end time, a time following the light emission end time of the row line preceding the current row line and corresponding to a second preset time difference from the charging end time is determined as the charging start time. That is, by using the light emission start time, light emission end time, and the predetermined first and second preset times for each row line, it is possible to control the charging of the column lines at the charging start time of each row line and to stop charging the column lines at the charging end time of each row line. Thus, by performing voltage compensation on the column lines before driving, it is possible to ensure that the voltage on the column lines remains the same before each row line starts emitting light, thereby improving the problem of uneven screen brightness caused by the resistive-capacitive delay effect. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the driving architecture for a mini LED display panel;

[0043] Figure 2 This is a schematic diagram of the driving timing of a mini LED display panel;

[0044] Figure 3 This is a flowchart of the display panel driving method provided in the embodiments of this application;

[0045] Figure 4This is a schematic diagram illustrating the determination of the charging end time provided in an embodiment of this application;

[0046] Figure 5 This is a schematic diagram illustrating the determination of the charging start time provided in an embodiment of this application;

[0047] Figure 6 This is a flowchart of the steps for controlling the charging of the column line at the start of charging and ending the charging of the column line at the end of charging, provided in an embodiment of this application.

[0048] Figure 7 This is a flowchart illustrating the steps for determining the first preset duration provided in an embodiment of this application;

[0049] Figure 8 This is a flowchart illustrating the steps for determining the second preset duration provided in an embodiment of this application;

[0050] Figure 9 This is a schematic diagram illustrating the process of determining the second preset duration provided in the embodiments of this application;

[0051] Figure 10 This is a flowchart of the steps for reducing the second debugging time based on charging efficiency to obtain a second preset time, provided in an embodiment of this application.

[0052] Figure 11 This is a schematic block diagram of the structure of the driving device for the display panel provided in the embodiments of this application;

[0053] Figure 12 This is another schematic block diagram of the structure of the driving device for the display panel provided in the embodiments of this application;

[0054] Figure 13 This is another schematic block diagram of the structure of the driving device for the display panel provided in the embodiments of this application. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0056] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0058] With the rapid development of Mini LED (submillimeter-sized light-emitting diode) display technology, Mini LED display products have begun to be applied to ultra-large screen high-definition displays, such as monitoring and command, high-definition broadcasting, high-end cinemas, medical diagnosis, advertising displays, conferences and exhibitions, office displays, virtual reality and other commercial fields.

[0059] In a Mini LED display panel, the anodes of each row of LEDs (light-emitting diodes) are connected together horizontally, and the cathodes of each column of LEDs are connected together vertically. When a row drive control signal is applied to a row, whether each LED in that row lights up is determined by the column drive control signals applied to the corresponding columns in that row.

[0060] Because of the parasitic capacitance on the column data lines (i.e., column lines), and due to the existence of the V-blanking region (the time interval between the last row and the first row of the next frame after the entire screen scan is completed), the time between the end of the first row's illumination and the start of the second row's illumination, and the time between the end of the second row's illumination and the start of the third row's illumination, are different from the time between the end of the last row's illumination in the current display and the start of the first row's illumination in the next display. This causes the discharge of charge on the parasitic capacitance to be different between the row lines. In other words, the degree of parasitic capacitance discharge before the first row begins to illuminate is different from the degree of parasitic capacitance discharge before the other row lines begin to illuminate. This results in uneven brightness across the entire display panel, especially with the first row appearing darker.

[0061] Based on this, this application proposes a driving method for a display panel. The aim is to perform voltage compensation on the column lines before each row line begins to emit light, thereby improving the problem of uneven brightness display on the display panel.

[0062] First, the display principle of the display panel will be explained in the embodiments of this application.

[0063] Reference Figure 1 , Figure 1 This is a schematic diagram of the driving architecture for a mini LED display panel. Figure 1As shown, the display panel 200 includes multiple row lines 210 and multiple column lines 220. Each row line 210 connects to the anode of each light-emitting diode (LED) along its direction, and each column line 220 connects to the cathode of each LED along its direction. Each row line 210 corresponds to an input row drive voltage waveform signal. For example, the nth row line 210 corresponds to the input row drive voltage waveform signal Gn, the (n+1)th row line 210 corresponds to the input row drive voltage waveform signal Gn+1, and the (n+2)th row line 210 corresponds to the input row drive voltage waveform signal Gn+2. Each column line 220 corresponds to an input column drive voltage waveform signal. For example, the nth column line 220 corresponds to the input column drive voltage waveform signal Sn, the (n+1)th column line 220 corresponds to the input column drive voltage waveform signal Sn+1, and the (n+2)th column line 220 corresponds to the input column drive voltage waveform signal Sn+2.

[0064] Reference Figure 2 , Figure 2 This is a driving timing diagram for a mini LED display panel. Figure 2 As shown, curve OE is the enable output curve of the row drive voltage waveform signal curve Gn. Only when Gn is high and Sn is low, a voltage difference is formed between the anode and cathode of the LEDs on the nth row and nth column lines, causing the LEDs to emit light. The luminous intensity is determined by the duration of illumination; the longer the duration, the brighter the light. (Refer to...) Figure 2 At time T1, Gn outputs a high-level signal. At time T2, Sn is pulled down to a low-level signal, creating a voltage difference between Gn and Sn at time T2, allowing the LED to light up. That is, the LED starts lighting up at time T2. At time T3, Sn is pulled up to a high-level signal, preventing a voltage difference between Gn and Sn at time T3, and the LED stops lighting up. That is, the LED stops lighting up at time T3. At time T4, Gn is pulled down to a low-level signal, turning off the nth row line corresponding to Gn. It is evident that the start and end times of LED lighting in each row are achieved by switching between high and low levels of Sn on the column line. However, parasitic capacitance exists on each column line, leading to varying brightness of the LEDs in each row due to the RC delay effect.

[0065] The specific implementation methods of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0066] Reference Figure 3 , Figure 3 This is a flowchart of a driving method for a display panel provided in an embodiment of this application, executed by a driving module, including but not limited to steps S310 to S360. The display panel includes row lines and column lines; the row lines connect to the anode of each light-emitting diode in the row line direction, and the column lines connect to the cathode of each light-emitting diode in the column line direction.

[0067] Step S310: Obtain the start time of illumination of the current row line on the display panel.

[0068] In this embodiment, considering that the charge release on parasitic capacitors is not uniform between row lines, the voltage on the corresponding column line is different before each row line starts emitting light, resulting in uneven display. To improve this uneven display, voltage compensation needs to be performed on the column lines before each row line starts emitting light, ensuring that the voltage on the corresponding column lines is the same before each row line starts emitting light. Determining the start and end times of voltage compensation is crucial. In this embodiment, by obtaining the start time of the current row line's light emission on the display panel, the end time of the voltage compensation for the corresponding column line can be determined.

[0069] Step S320: Before the start time of light emission of the current row line, the charging end time is the time corresponding to the time that differs from the start time of light emission of the current row line by a first preset time.

[0070] In this embodiment of the application, after determining the light emission start time of the current row line, the charging end time can be a time corresponding to the difference between the light emission start time of the current row line and the light emission start time of the current row line. It should be noted that the first preset time is a predetermined time.

[0071] For example, refer to Figure 4 , Figure 4 This is a schematic diagram illustrating the determination of the charging end time provided in an embodiment of this application. Figure 4 As shown, taking the second line in the display as the current line as an example, the driver module can determine the starting time of the second line's illumination as t based on the received data to be displayed. S If the first preset duration is T1, then the charging end time corresponding to the second line can be determined as Te.

[0072] Step S330: Obtain the end time of the light emission of the previous row line of the current row line.

[0073] In this embodiment, after determining the light emission end time corresponding to the current row line, it is necessary to further determine the charging start time corresponding to the current row line based on the light emission end time of the row line preceding the current row line. In this embodiment, the driving module can obtain the light emission end time of the row line preceding the current row line through the received data to be displayed.

[0074] Step S340: After the end time of light emission of the previous row line, the time corresponding to the second preset time difference from the end time of charging is taken as the start time of charging. The sum of the first preset time and the second preset time is less than or equal to the time between the end time of light emission of the previous row line and the start time of light emission of the current row line.

[0075] In this embodiment, after obtaining the end time of light emission of the previous row, the charging start time can be set at a time corresponding to the difference between the end time of charging and the end time of charging. It should be noted that the second preset time is a time predetermined based on a first preset time, and the sum of the first preset time and the second preset time is less than or equal to the time between the end time of light emission of the previous row and the start time of light emission of the current row.

[0076] For example, refer to Figure 5 , Figure 5 This is a schematic diagram illustrating the determination of the charging start time provided in an embodiment of this application. Figure 5 As shown, taking the second line in the display as the current line as an example, the driver module can determine the starting time of the second line's illumination as t based on the received data to be displayed. S If the predetermined first preset duration is T1, then the charging end time corresponding to the second row line can be determined as Te. Then, the light emission end time of the row line preceding the second row line, i.e., the first row line, is obtained as t. e The predetermined second preset duration is T2, so that at the end of the emission time t e Then, the charging start time Ts is the time that is different from the charging end time Te by a second preset time T2.

[0077] Step S350: Control the charging of the column line at the start of the charging of the current row line and stop the charging of the column line at the end of the charging of the current row line, so as to perform voltage compensation on the column line and then drive it.

[0078] In this embodiment, the driving module can determine the charging start time and charging end time corresponding to the current row line by obtaining the light emission start time of the current row line and the light emission end time of the previous row line, as well as the predetermined first preset duration and second preset duration. Thus, the driving module can control the charging of the column line at the charging start time of the current row line and stop the charging of the column line at the charging end time of the current row line, so that the driving can be performed after voltage compensation on the column line.

[0079] For example, taking the second row line in the display panel as the current row line. Based on the light emission start time t of the second row line... sBased on the predetermined first preset duration T1, the charging end time Te corresponding to the second row line can be determined. According to the light emission end time t of the first row line... e Based on the charging end time Te corresponding to the second row line and the predetermined second preset duration T2, the charging start time Ts corresponding to the second row line can be determined. Therefore, after determining the charging start time Ts and the charging end time Te corresponding to the second row line, the drive module can control the start of charging to each column line at the charging start time Ts corresponding to the second row line, and control the end of charging at the charging end time Te corresponding to the second row line. This ensures that before the second row line starts emitting light, voltage compensation is performed on each column line, making the voltage on the column line consistent with the voltage on the column line before the second row line starts emitting light, thereby improving the problem of uneven display on the display panel, especially improving the color shift problem of the first row line on the display panel.

[0080] In one embodiment of this application, reference is made to Figure 6 , Figure 6 This is a flowchart of the steps provided in this application embodiment to control the charging of the column line at the start of the charging of the current row line and to stop the charging of the column line at the end of the charging of the current row line. It is executed by the driving module and includes, but is not limited to, steps S610 to S620.

[0081] Step S610: Control the charging of the column line at the start of charging of the current row line;

[0082] Step S620: Before the charging end time of the current row line, control the voltage on the column line after charging to reach the target voltage, and then control the charging to the column line to end at the charging end time.

[0083] In this embodiment, the driving module needs to determine the target voltage based on the data to be displayed. Therefore, at the start of charging for the current row line, the driving module first controls the charging of each column line to begin, and ensures that before the end of charging for the current row line, the voltage on each column line reaches the preset target voltage, and then controls the charging to end at the end of charging.

[0084] It should be noted that the drive module can control the voltage to reach the target voltage exactly at the end of charging for the current row line after charging begins, thus stopping charging. Alternatively, it can reach the target voltage before the end of charging, maintain that target voltage until the end of charging, and then stop charging when the end of charging is reached.

[0085] For example, taking the second row line in the display panel as the current row line, the light emission start time t of the second row line is used as an example. sBased on the predetermined first preset duration T1, the charging end time Te corresponding to the second row line can be determined. According to the light emission end time t of the first row line... e Based on the charging end time Te corresponding to the second row line and the predetermined second preset duration T2, the charging start time Ts corresponding to the second row line can be determined. Therefore, since the charging start time Ts and charging end time Te corresponding to the second row line are determined, charging to each column line can be started directly at the charging start time Ts corresponding to the second row line, and charging can be stopped at the charging end time Te corresponding to the second row line. This ensures that the voltage on the column lines is compensated before the second row line starts emitting light, thereby improving the problem of uneven display on the display panel.

[0086] Step S360: Update the next row of the current row to the current row and return to the step of obtaining the start time of illumination of the current row on the display panel.

[0087] In this embodiment, after determining the charging start time and charging end time corresponding to the current row line, charging can be controlled to start at the charging start time corresponding to the current row line, and charging can be controlled to end at the charging end time corresponding to the current row line. This allows for voltage compensation via the column lines before driving the LEDs on the row lines to emit light, thereby improving the problem of uneven display on the display panel.

[0088] For example, the driving module determines the charging start time as Ts2 and the charging end time as Te2 for the second row line based on the light emission end time of the first row line, the light emission start time of the second row line, and a predetermined first preset duration and a predetermined second preset duration. The driving module controls the charging of each column line to begin at the charging start time Ts2, and controls the charging voltage to reach and maintain the target voltage Vn before the charging end time Te2, and then controls the charging to end when the charging end time Te2 is reached. Similarly, the driving module determines the charging start time Ts3 and the charging end time as Te3 for the third row line based on the light emission end time of the second row line, the light emission start time of the third row line, and a predetermined first preset duration and a predetermined second preset duration. The driving module controls the charging of each column line to begin at the charging start time Ts3, and controls the charging voltage to reach and maintain the target voltage Vn before the charging end time Te3, and then controls the charging to end when the charging end time Te3 is reached. Similarly, the driving module determines the charging start time (Ts1) and charging end time (Te1) of the first row line (the last row line) based on the light emission end time of the last row line (the last row line), the light emission start time of the first row line (the first row line), and a predetermined first and second preset duration. The driving module controls the charging of each row line to begin at the charging start time (Ts1), and controls the charging voltage to reach and maintain the target voltage (Vn) before the charging end time (Te1). Then, it controls the charging to end when the charging end time (Te1) is reached. In this way, by controlling the charging start time of each row line to start charging each row line and maintaining the target voltage after reaching it, and controlling the charging to end when the charging end time is reached, the voltage at the same time interval corresponding to the first preset duration before each row line starts emitting light can be the same, thereby improving the problem of uneven display on the display panel, especially improving the color shift problem of the first row line on the display panel.

[0089] In one embodiment of this application, reference is made to Figure 7 , Figure 7 This is a flowchart of the steps for determining the first preset duration provided in the embodiments of this application, including but not limited to steps S710 to S730.

[0090] Step S710: Obtain the start and end times of light emission for each row of lines on the display panel;

[0091] Step S720: Determine the target duration based on the light emission start time and light emission end time of each row line. The target duration is the duration between the light emission end time of the previous row line and the light emission start time of the current row line.

[0092] Step S730: Select the shortest target duration as the first debugging duration, and determine the first preset duration based on the first debugging duration. The first preset duration is less than the first debugging duration.

[0093] In this embodiment, the first preset duration is a predetermined duration. By acquiring the start and end times of light emission for each row, the duration between the end time of light emission of the previous row and the start time of light emission of the current row can be determined. For example, the duration between the end time of light emission of the first row and the start time of light emission of the second row, the duration between the end time of light emission of the second row and the start time of light emission of the third row, the duration between the end time of light emission of the last row and the start time of light emission of the first row, etc. Then, the duration with the shortest duration between the end time of light emission of the previous row and the start time of light emission of the current row is selected as the first debugging duration, and the first preset duration is determined based on the first debugging duration. The first preset duration is less than the first debugging duration.

[0094] It should be noted that in determining the first preset duration, since voltage compensation for the current row line needs to be performed after the previous row line finishes illuminating and before the current row line starts illuminating, the determined first preset duration must be less than the first debugging duration. Since the performance parameters of the display panel are determined once production is complete, the specific moment at which charging ends after the previous row line finishes illuminating and before the current row line starts illuminating can be further determined based on the display panel's performance parameters. Therefore, a suitable first preset duration can be selected within the first debugging duration based on the display panel's performance parameters. These performance parameters may include size, resolution, color gamut, refresh rate, etc.

[0095] It should be noted that during the debugging process, the first debugging duration can be further adjusted according to the display effect requirements of the display panel to finally obtain the first preset duration.

[0096] In one embodiment of this application, reference is made to Figure 8 , Figure 8 This is a flowchart of the steps for determining the second preset duration provided in the embodiments of this application, including but not limited to steps S810 to S850.

[0097] Step S810: Select the longest target duration as the first target duration;

[0098] Step S820: Obtain the end time of light emission of the previous target line corresponding to the first target duration and the start time of light emission of the current target line corresponding to the first target duration;

[0099] Step S830: Before the light emission start time corresponding to the current target row line, the time that differs from the light emission start time of the current target row line by a first preset time is taken as the first time.

[0100] Step S840: Obtain the duration between the end time of the light emission of the previous target line and the first time as the second debugging duration;

[0101] Step S850: Reduce the second debugging time according to the charging efficiency to obtain a second preset time, wherein the second preset time is less than or equal to the second debugging time.

[0102] In this embodiment, the second preset duration can be determined based on a pre-determined first preset duration. Similarly, by acquiring the light emission start time and light emission end time of each row line, the duration between the light emission end time of the previous row line and the light emission start time of the current row line can be determined. For example, the duration between the light emission end time of the first row line and the light emission start time of the second row line, the duration between the light emission end time of the second row line and the light emission start time of the third row line, the duration between the light emission end time of the tail row line and the light emission start time of the first row line, etc. Then, the longest duration between the light emission end time of the previous row line and the light emission start time of the current row line is selected as the first target duration. The light emission end time of the previous target row line corresponding to the first target duration and the light emission start time of the current target row line corresponding to the first target duration are acquired. Thus, before the light emission start time corresponding to the current target row line, a time that differs from the light emission start time of the current target row line by a first preset duration can be used as the first time. Furthermore, the duration between the light emission end time of the previous target row line and the first time can be acquired as the second debugging duration. After obtaining the second debugging time, the second debugging time can be reduced according to the charging efficiency to obtain the second preset time, wherein the second preset time is less than or equal to the second debugging time.

[0103] For example, refer to Figure 9 , Figure 9 This is a schematic diagram illustrating the process of determining the second preset duration provided in an embodiment of this application. Figure 9 As shown, the longest time between the end of the light emission of the tail line and the start of the light emission of the head line is determined from the time between the end of the light emission of the previous line and the start of the light emission of the current line in each pair of adjacent lines. This time is then used as the first target time. Then, the end of the light emission of the tail line is obtained as te. n The starting time of the first line's light emission is ts1. Therefore, before the starting time ts1 of the first line's light emission, a time differing from this starting time ts1 by a first preset duration T1 is taken as the first time T1. Thus, it can be determined that the charging start time corresponding to the first line should be the ending time ts1 of the last line's light emission.n Between the first moment T1 and the moment when the taillight ends at the moment te. n The duration between the first moment T1 and the second debugging duration T is taken as the second debugging duration T. The second debugging duration is reduced according to the charging efficiency to obtain the second preset duration T2, wherein the second preset duration T2 is less than or equal to the second debugging duration T.

[0104] It should be noted that the first and second preset durations obtained after debugging must meet the following condition: the sum of the first and second preset durations must be less than or equal to the duration between the end time of the previous row's illumination and the start time of the current row's illumination on each pair of adjacent rows on the display panel. The first and second preset durations obtained after debugging need to be pre-written into the driver module.

[0105] In one embodiment of this application, reference is made to Figure 10 , Figure 10 This application provides a flowchart of steps for reducing the second debugging time based on charging efficiency to obtain a second preset time, including but not limited to steps S1010 to S1030.

[0106] Step S1010: Obtain the second target duration between the start of charging of the nematic line and the arrival of the target voltage after charging;

[0107] Step S1020: When the second target duration is less than or equal to the second debugging duration, determine the second target duration as the second preset duration;

[0108] Step S1030: When the second target duration is greater than the second debugging duration, adjust the charging efficiency until the second target duration is less than or equal to the second debugging duration.

[0109] In this embodiment, after determining the second debugging duration, it indicates that the voltage after charging each line within the second debugging duration should reach the target voltage. Specifically, since the charging end time is predetermined, a target time can be randomly selected within the second debugging duration, and charging can begin at a predetermined charging efficiency. It is then determined whether the voltage at the charging end time is the target voltage. If the voltage at the charging end time is the target voltage, then the target time is determined to be a valid time. Using this target time as a base point, other times are taken at fixed time intervals before and after the target time, and charging begins at a predetermined charging efficiency. It is then determined whether the voltage at the charging end time is the target voltage. In this way, multiple valid time points can be selected. Therefore, one of the valid time points can be arbitrarily selected to determine the final second preset duration.

[0110] It should be noted that when the end time of the previous line's light emission within the second debugging period is taken as the target time, and charging begins with a predetermined charging efficiency, it is found that the voltage is less than the target voltage when the charging end time is reached. This indicates that the voltage cannot reach the target voltage after charging with the predetermined charging efficiency for the entire second debugging period. In this case, the charging efficiency needs to be adjusted, that is, the charging efficiency needs to be increased so that the voltage can reach the target voltage after charging with the predetermined charging efficiency for the entire second debugging period.

[0111] Reference Figure 11 , Figure 11 This is a schematic block diagram of the structure of the driving device for the display panel provided in an embodiment of this application. Figure 11 As shown, the display panel 200 includes row lines 210 and column lines 220, and the driving device 100 includes a timing control module 110 and a driving module 120. The driving module 120 is electrically connected to the timing control module 110 and to the row lines 210 and column lines 220 in the display panel 200.

[0112] In this embodiment, the driving module 120 can convert the row driving control signal sent by the timing control module 110 into a row driving voltage waveform signal Gn that can be recognized by the display panel 200. Simultaneously, it can convert the column driving control signal sent by the timing control module 110 into a column driving voltage waveform signal Sn that can be recognized by the display panel 200. Therefore, the display panel can be driven after voltage compensation based on the row driving control signal and the column driving control signal, and by applying the driving method described in this embodiment.

[0113] It is understood that the display panel 200 is driven row by row. When inputting a row drive voltage waveform signal to the top row line 210 of the display panel 200, the corresponding column drive voltage waveform signal must be input to each column line 220 on the row line 210 simultaneously. While inputting the corresponding column drive voltage waveform signal to each column line 220 on the row line 210, the driving method described in this embodiment must also be executed to perform voltage compensation on each column line. Thus, the illumination and illumination duration of each LED on the row line 210 can be controlled by jointly inputting the row drive voltage waveform signal of the row line 210 and the corresponding column drive voltage waveform signals and voltage compensation signals for each column line 220 on the row line 210. After the top row line 210 of the display panel 200 is driven, the LEDs on the next row line 210 are driven in the same way.

[0114] Reference Figure 12 , Figure 12 This is another schematic block diagram of the driving device for the display panel provided in the embodiments of this application. Figure 12As shown, the display panel 200 includes row lines 210 and column lines 220, and the driving device 100 includes a timing control module 110 and a driving module 120. The driving module 120 is electrically connected to the timing control module 110, and the driving module 120 includes a row driving unit 121 and a plurality of column driving units 122. The row driving unit 121 is electrically connected to the row lines, and the column driving unit 122 is electrically connected to the column lines.

[0115] In this embodiment, the driving module 120 includes a row driving unit 121 and multiple column driving units 122. The row driving unit 121 controls the input of row line driving signals for each row of the display panel 200, and each column driving unit 122 controls the input of column line driving signals for each column of the display panel 200. Furthermore, each driving unit 122 is also used to charge the column lines at the start of charging and to stop charging at the end of charging, so as to perform voltage compensation on the column lines before driving.

[0116] In this embodiment, the row driving unit 121 receives row driving control signals sent by the timing control module 110, generates row driving voltage waveform signals according to the row driving control signals, and transmits the row driving voltage waveform signals to the row lines. The column driving unit 122 receives column driving control signals corresponding to multiple column lines sent by the timing control module 110, generates column driving voltage waveform signals corresponding to each column line according to the column driving control signals and transmits them to the corresponding column lines, and drives the column lines after voltage compensation by charging the column lines at the start of charging and stopping charging the column lines at the end of charging.

[0117] For example, row driving unit 121 first inputs the row driving voltage waveform signal to the first row line, and each column driving unit 122 inputs the column driving voltage waveform signals corresponding to multiple column lines to their respective column lines. Simultaneously, it controls the start of charging for each column line at the start of charging for the first row line and controls the end of charging at the end of charging for the first row line. This drives all LEDs on the first row line to emit light. Next, row driving unit 121 inputs the row driving voltage waveform signal to the second row line, and each column driving unit 122 inputs the column driving voltage waveform signals corresponding to multiple column lines to their respective column lines. Simultaneously, it controls the start of charging for each column line at the start of charging for the second row line and controls the end of charging at the end of charging for the second row line. This drives all LEDs on the second row line to emit light.

[0118] It is understandable that each column drive unit 122 is responsible for the drive control of multiple column lines. For example, one column drive unit 122 can be responsible for the drive control of 960 column lines.

[0119] In one embodiment of this application, reference is made to Figure 13 , Figure 13 This is another schematic block diagram of the driving device for the display panel provided in the embodiments of this application. Figure 13 As shown, the column drive unit 122 includes a charging control component 1220, which includes a timing controller 1221, a first switch 1222, and a power module 1223. The power module 1223 is connected to the first switch 1222 and is used to charge the column lines when the first switch 1222 is turned on, for voltage compensation on the column lines. The timing controller 1221 controls the first switch 1222 to turn on and off according to a first preset duration, a second preset duration, and the start and end times of light emission for each row line.

[0120] In this embodiment of the application, by setting a charging control component 1220 in the column driving unit 122, the charging control component 1220 can control the column line to be charged at the start time of charging of each row line and to stop charging of the column line at the end time of charging of each row line, so as to drive the column line after voltage compensation.

[0121] In one embodiment of this application, the timing controller 1221 is used for:

[0122] The first switch is turned on at the start of charging for each row of lines and turned off at the end of charging for each row of lines.

[0123] In this embodiment, a first preset duration and a second preset duration need to be pre-written into the timing controller 1221 of the charging control component 1220. Therefore, after obtaining the light emission start time and light emission end time of each row line, the timing controller 1221 can automatically determine the charging start time and charging end time corresponding to each row line based on the first preset duration and the second preset duration. This allows it to control the first switch to be turned on at the charging start time of each row line and to be turned off at the charging end time of each row line, thereby controlling voltage compensation to each column line and improving the problem of uneven display on the display panel.

[0124] This application also provides a display device, including a display panel 200 and a driving device 100 provided in any embodiment of this application. The driving device 100 includes a timing control module 110 and a driving module 120, the driving module 120 being applicable to… Figure 3 The driving method shown drives the display panel 200.

[0125] Since the display device provided in this application includes the driving device 100 provided in any embodiment of this application, the display device of this application can improve the problem of uneven image display in the display panel.

[0126] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0127] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0128] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0129] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0130] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0131] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0133] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0134] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0135] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0136] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes row lines and column lines, the row lines connecting the anode of each light-emitting diode in the row line direction, and the column lines connecting the cathode of each light-emitting diode in the column line direction. The method includes: Obtain the start time of illumination of the current row line on the display panel; Before the light emission start time of the current row line, the charging end time is the time corresponding to the time difference of the light emission start time of the current row line from the first preset time. Obtain the end time of light emission of the previous row line of the current row line; After the end time of the light emission of the previous row line, the time corresponding to the second preset time difference from the end time of the charging is taken as the charging start time. The sum of the first preset time and the second preset time is less than or equal to the time between the end time of the light emission of the previous row line and the start time of the light emission of the current row line. The second preset duration is determined based on the first preset duration, and determining the second preset duration includes: The longest target duration is selected as the first target duration, which is the duration between the end of the light emission of the previous row line and the start of the light emission of the current row line. Obtain the end time of light emission of the previous target line corresponding to the first target duration and the start time of light emission of the current target line corresponding to the first target duration; Before the light emission start time corresponding to the current target row line, the time that differs from the light emission start time of the current target row line by the first preset time is taken as the first time. The duration between the end time of the light emission of the previous target line and the first time is used as the second debugging duration. Obtain a second target duration from the start of charging the column line to the arrival of the target voltage after charging; When the second target duration is less than or equal to the second debugging duration, the second target duration is determined to be the second preset duration. When the second target duration is greater than the second debugging duration, adjust the charging efficiency until the second target duration is less than or equal to the second debugging duration; The system controls the charging of the column line to begin at the charging start time of the current row line and ends the charging of the column line at the charging end time of the current row line, so as to drive the column line after voltage compensation. Update the next row of the current row to the current row, and return to the step of obtaining the start time of illumination of the current row on the display panel.

2. The method according to claim 1, characterized in that, The control of charging the column line at the start time of charging the current row line and ending charging the column line at the end time of charging the current row line includes: Control the charging of the column line at the charging start time of the current row line; Before the charging end time of the current row line, the voltage of the column line after charging is controlled to reach the target voltage, and then the charging to the column line is controlled to end at the charging end time.

3. The method according to claim 1, characterized in that, Determining the first preset duration includes: Obtain the start and end times of light emission for each row of lines on the display panel; The target duration is determined based on the light emission start time and light emission end time of each row. The shortest target duration is selected as the first debugging duration, and a first preset duration is determined based on the first debugging duration, wherein the first preset duration is less than the first debugging duration.

4. A driving device for a display panel, characterized in that, The display panel includes row lines and column lines. The row lines are connected to the anodes of each light-emitting diode in the row line direction, and the column lines are connected to the cathodes of each light-emitting diode in the column line direction. The driving device includes a timing control module and a driving module. The driving module is electrically connected to the timing control module and to the row lines and the column lines. The timing control module is used to generate row drive control signals and column drive control signals based on the data to be displayed. The driving module is used to drive the display panel according to the row driving control signal and the column driving control signal, and by applying the driving method according to any one of claims 1-3.

5. The driving device according to claim 4, characterized in that, The driving module includes a row driving unit and multiple column driving units; the row driving unit is electrically connected to the row line, and the column driving unit is electrically connected to the column line; The row drive unit is used to generate a row drive voltage waveform signal according to the row drive control signal sent by the timing control module and transmit it to the row line; The column drive unit is used to generate column drive voltage waveform signals corresponding to each column line according to the column drive control signals sent by the timing control module, and transmit them to the corresponding column line. It also drives the column line after voltage compensation by charging the column line at the start of charging and stopping charging the column line at the end of charging.

6. The driving device according to claim 5, characterized in that, The column drive unit includes a charging control component, which includes a timing controller, a first switch, and a power module. The power module is connected to the first switch and is used to charge the column line when the first switch is turned on, so as to perform voltage compensation on the column line. The timing controller is used to control the first switch to turn on and off according to the first preset duration, the second preset duration, and the start and end times of light emission for each row.

7. The driving device according to claim 6, characterized in that, The timing controller is used for: The first switch is turned on at the start of charging for each row of lines, and turned off at the end of charging for each row of lines.

8. A display device, characterized in that, Includes a display panel and the driving device as described in any one of claims 4-7; The driving module in the driving device drives the display panel using the driving method described in any one of claims 1-3.

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