Display device, display driving method and timing controller

Abstract

A display device, display driving method, and timing controller. The display device includes a plurality of sub-pixels arranged in an array, a crosstalk detector, and a timing controller. The crosstalk detector is configured to: obtain display data of an image displayed by the display device; obtain, for each column of at least one of the plurality of sub-pixels, a plurality of display difference information based on the display data, each piece of display difference information being obtained based on the grayscale information between two adjacent rows of sub-pixels; determine, based on the plurality of display difference information, whether crosstalk exists in the image displayed by the display device; and the timing controller is configured to: adjust the polarity information of the liquid crystal molecules of the plurality of sub-pixels in response to the presence of crosstalk in the image displayed by the display device. The display device can improve crosstalk that occurs during display due to hardware circuit or process defects during panel manufacturing.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a display device, a display driving method, and a timing controller. Background Art

[0002] With the rapid development of display technology, display panels are increasingly moving towards high integration and low cost. Liquid Crystal Display (LCD) panels have been a rapidly developing high-tech technology over the past two decades. Due to their advantages such as thinner and lighter weight, low radiation, high contrast, fast response speed, and low energy consumption, they have been widely used in flat-panel display devices. Summary of the Invention

[0003] At least one embodiment of the present disclosure provides a display device, comprising a plurality of sub-pixels and a crosstalk detector, wherein the plurality of sub-pixels are arranged in an array, the crosstalk detector being configured to: obtain display data of an image displayed by the display device; obtain, for each column of at least one column of the plurality of sub-pixels, a plurality of display difference information based on the display data, each piece of display difference information being obtained based on grayscale information between two adjacent rows of sub-pixels; determine, based on the plurality of display difference information, whether crosstalk exists when the image is displayed by the display device; and a timing controller being configured to adjust polarity information of liquid crystal molecules of the plurality of sub-pixels in response to the presence of crosstalk in the image displayed by the display device.

[0004] For example, in the display device provided in some embodiments of the present disclosure, the timing controller includes a timing adjustment module, and the crosstalk detector is configured to: in response to the display device displaying the presence of the crosstalk in the image, provide a first indication signal to the timing adjustment module, and the timing adjustment module is configured to: adjust the polarity information of the liquid crystal molecules of the multiple sub-pixels based on the first indication signal.

[0005] For example, in the display device provided in some embodiments of the present disclosure, the timing controller further includes: a timing generation module configured to provide first polarity information to the crosstalk detector, wherein the first polarity information indicates the polarity of the liquid crystal molecules in the multiple sub-pixels, and the crosstalk detector is configured to: determine whether there is crosstalk when the display device displays the image based on the multiple display difference information and the first polarity information.

[0006] For example, in the display device provided in some embodiments of the present disclosure, the two adjacent rows of sub-pixels include a first row of sub-pixels and a second row of sub-pixels. When the first row of sub-pixels is charged, the first row of sub-pixels is provided with a first voltage. When the second row of sub-pixels is charged, the second row of sub-pixels is provided with a second voltage. The crosstalk detector is configured to: determine a voltage change direction according to the first polarity information, the voltage change direction being determined based on the first voltage and the second voltage, and the voltage change direction including voltage pull-up and voltage pull-down; and determine whether there is crosstalk when the display device displays the image based on the multiple display difference information and the voltage change direction corresponding to each of the multiple display difference information.

[0007] For example, in the display device provided in some embodiments of the present disclosure, voltage pull-up includes one of the following situations: the two adjacent rows of sub-pixels are both negative polarity, and the grayscale value of the first row of sub-pixels is greater than the grayscale value of the second row of sub-pixels; the two adjacent rows of sub-pixels are both positive polarity, and the grayscale value of the first row of sub-pixels is less than the grayscale value of the second row of sub-pixels; or the first row of sub-pixels is negative polarity, and the second row of sub-pixels is positive polarity, wherein the turn-on time of the first row of sub-pixels is earlier than the turn-on time of the second row of sub-pixels.

[0008] For example, in the display device provided in some embodiments of the present disclosure, the voltage pull-down includes one of the following situations: the two adjacent rows of sub-pixels are both negative polarity, and the grayscale value of the first row of sub-pixels is less than the grayscale value of the second row of sub-pixels; the two adjacent rows of sub-pixels are both positive polarity, and the grayscale value of the first row of sub-pixels is greater than the grayscale value of the second row of sub-pixels; or the first row of sub-pixels are positive polarity, the second row of sub-pixels are negative polarity, and the turn-on time of the first row of sub-pixels is earlier than the turn-on time of the second row of sub-pixels.

[0009] For example, in the display device provided in some embodiments of the present disclosure, each display difference information includes a first difference between the grayscale values ​​of the two adjacent rows of sub-pixels, and the crosstalk detector is configured to: obtain a first number of the first difference values ​​being greater than a first threshold value in the voltage pull-up situation and a second number of the first difference values ​​being greater than a second threshold value in the voltage pull-down situation; and based on the first number and the second number, determine whether there is crosstalk when the display device displays the image.

[0010] For example, in the display device provided in some embodiments of the present disclosure, the crosstalk detector is configured to: calculate a second difference between the first number and the second number; and in response to the second difference being greater than a preset threshold, cumulatively count the second difference to obtain a cumulative count value; and in response to the cumulative count value being greater than a polarity reversal threshold, determine that crosstalk exists when the display device displays the image.

[0011] For example, in the display device provided in some embodiments of the present disclosure, the crosstalk detector is further configured to: in response to the display device displaying that the image does not contain the crosstalk, provide a second indication signal to the timing adjustment module, the second indication signal being different from the first indication signal, and the timing adjustment module is further configured to: in response to obtaining the second indication signal, determine that the polarity information of the liquid crystal molecules of multiple sub-pixels is the first polarity information.

[0012] At least some embodiments of the present disclosure also provide a display driving method for a display device, wherein the display device includes a plurality of sub-pixels arranged in an array, and the detection and compensation method includes: obtaining display data of an image displayed by the display device; for each column of at least one column of the plurality of sub-pixels, obtaining a plurality of display difference information based on the display data, wherein each piece of display difference information is obtained based on grayscale information between two adjacent rows of sub-pixels; determining whether there is crosstalk when the display device displays the image based on the plurality of display difference information; and in response to the presence of crosstalk in the image displayed by the display device, adjusting the polarity information of the liquid crystal molecules of the plurality of sub-pixels to drive the display device according to the polarity of the liquid crystal molecules.

[0013] At least some embodiments of the present disclosure also provide a timing controller, which is applied to a display device, wherein the display device includes a plurality of sub-pixels arranged in an array, and the timing controller is configured to adjust the polarity information of the liquid crystal molecules of the plurality of sub-pixels in response to the presence of crosstalk in an image displayed by the display device, and the timing controller includes a crosstalk detection module, which is configured to: obtain display data of the image displayed by the display device; for each column of at least one column of the plurality of sub-pixels, obtain a plurality of display difference information based on the display data, each piece of display difference information is obtained based on the grayscale information between two adjacent rows of sub-pixels; and determine whether there is crosstalk in displaying the image by the display device based on the multiple display difference information.

[0014] For example, in the timing controller provided in some embodiments of the present disclosure, a timing adjustment module is further included, and the crosstalk detection module is further configured to: in response to the display device displaying the image with the crosstalk, provide a first indication signal to the timing adjustment module, and the timing adjustment module is configured to: in response to obtaining the first indication signal, adjust the polarity information of the liquid crystal molecules of the multiple sub-pixels. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, rather than limiting the present disclosure.

[0016] Figure 1A shows a schematic diagram of an equivalent circuit of an LCD panel;

[0017] Figure 1B An equivalent circuit of a sub-pixel in an LCD panel is shown;

[0018] Figure 1C A voltage waveform diagram for driving the positive and negative polarity changes of liquid crystal molecules is shown;

[0019] Figure 2A A schematic diagram of a display device provided by at least one embodiment of the present disclosure is shown;

[0020] Figure 2B A schematic diagram of a timing controller provided by at least one embodiment of the present disclosure is shown;

[0021] Figure 3 A schematic diagram showing a voltage variation method provided by at least one embodiment of the present disclosure is shown;

[0022] Figure 4 A schematic diagram showing another voltage variation method provided by at least one embodiment of the present disclosure is shown;

[0023] Figure 5 A schematic diagram showing the arrangement of sub-pixels of a liquid crystal display panel provided by at least one embodiment of the present disclosure is shown;

[0024] Figure 6 A schematic diagram showing a timing controller provided by at least one embodiment of the present disclosure; and

[0025] Figure 7 A flowchart of a display driving method provided by at least one embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0027] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] Figure 1A shows a schematic diagram of an equivalent circuit of an LCD panel; Figure 1B An equivalent circuit of a sub-pixel in an LCD panel is shown; Figure 1C A voltage waveform diagram for driving the liquid crystal molecules to change their positive and negative polarities is shown.

[0029] like Figure 1A As shown, the LCD panel includes a plurality of sub-pixels 101 arranged in an array. Figure 1B As shown, each sub-pixel 101 includes a pixel switch element T0, a liquid crystal capacitor C LC and storage capacitor C ST The pixel switch element T0 can be, for example, a thin film transistor, whose first electrode (e.g., drain) is electrically connected to the pixel electrode, the second electrode (e.g., source) is electrically connected to the source line corresponding to the pixel column where the sub-pixel is located, and the control electrode (e.g., gate) is electrically connected to the gate line corresponding to the pixel row where the sub-pixel is located. The liquid crystal molecules are located between the pixel electrode and the common electrode, forming a liquid crystal capacitor C LC , used to store the data signal written by the pixel switching element T0. Storage capacitor C ST It is formed by the overlap between the pixel electrode and a potential reference electrode. For example, depending on the potential reference electrode, the storage capacitor has two structural forms. One is to use the common electrode as the potential reference electrode, called CST-on-COM. Figure 1B The equivalent circuit shown is an example of a CST-on-COM circuit. Another approach uses the gate line of the previous (or next) row of pixels as the potential reference electrode, known as CST-on-Gate. For example, each row of subpixels is connected to a gate line, and each column of subpixels is connected to a source line.

[0030] In an LCD panel, liquid crystal is a non-conductive dielectric layer, typically located between pixel electrodes on an array substrate and a common electrode on a color filter substrate, forming a liquid crystal cell. To prevent polarization of the liquid crystal molecules during operation, a voltage signal with alternating positive and negative polarity is applied to the liquid crystal molecules to achieve AC drive.

[0031] like Figure 1C As shown, the voltage of the common electrode is fixed, and the voltage of the pixel electrode fluctuates up and down according to different gray levels. Figure 1C The example shows the voltage waveform changes of the pixel electrode with 256 grayscales. V0 to V255 represent the voltages corresponding to different grayscale values. For example, the grayscale value corresponding to voltage value V0 is higher than the grayscale value corresponding to voltage V255. For example, for the Nth image frame, the voltage of the common electrode is higher than the voltage of the pixel electrode, and the liquid crystal molecules are negative polarity; for the N+1th image frame, the voltage of the common electrode is lower than the voltage of the pixel electrode, and the liquid crystal molecules are positive polarity. Whether positive or negative polarity, liquid crystal molecules can achieve different grayscales.

[0032] like Figure 1A The waveform on the left is the driving waveform of the gate line. The high level of each row of gate lines is given in an alternating manner, thereby achieving the purpose of row-by-row driving. At the same time, it is ensured that only the gate of one row of sub-pixels is open, that is, all the sub-pixels in the row are charged. At the same time, multiple source lines provide the liquid crystal driving voltage required for the display of this row. When the charging of the pixels in this row is completed, the gate of the sub-pixels in this row is closed, and the sub-pixels in this row enter the holding state, waiting for the next frame to scan to this row and charge again. According to the above display driving method, the LCD panel is charged and maintained row by row from the first row to the last row. The source line charges all the sub-pixels in each row at the same time through the source of the transistor in the sub-pixel, so that the pixel display of each row is completed row by row, completing the display of one frame of the picture. When the next frame of data is input, the above scanning drive is repeated, and the display of the entire picture is completed row by row.

[0033] Only when the transistor in the sub-pixel is in the ON state can the liquid crystal box be affected by the voltage signal on the source line, charging and discharging the liquid crystal box through the transistor. If the transistor is in the OFF state, the liquid crystal box is theoretically isolated from other external electrodes or liquid crystal boxes, so it will not be affected by changes in other voltage signals. However, the transistor is not a completely ideal switch, and leakage current will still be generated when the transistor is in the OFF state. The stray capacitance effect between the various electrodes and the semiconductor components will affect the display state of the liquid crystal box.

[0034] A change in the voltage source on a single gate line in an LCD panel can disrupt the display's grayscale display. This phenomenon is known as crosstalk. If a change in the operating electrode state of another subpixel in the display affects the original display state of that subpixel, the display's image will exhibit crosstalk, resulting in visible lines.

[0035] LCD screen crosstalk is mainly caused by the following factors: (1) Spark interference: The sub-pixels in the LCD panel are controlled by liquid crystal molecules. When the liquid crystal molecules are disturbed by voltage during the switching process, incomplete switching may occur, resulting in image cross-interference. (2) Response time: Liquid crystal molecules need a certain amount of time to change their polarity. If the response time of the liquid crystal molecules is too long, when the image is switched quickly, the image of the previous frame may still exist in the pixel and overlap with the image of the current frame. (3) Signal interference: During the driving process of the LCD panel, noise or other electromagnetic interference in the circuit may interfere with the signal, resulting in image cross-interference. (4) Voltage fluctuation: When the voltage fluctuates or is unstable, the liquid crystal molecules may not be able to switch completely, resulting in image cross-interference.

[0036] For example, when the signal on the panel's source line changes, it couples to the common electrode signal through parasitic capacitance. Under certain display conditions, when the coupling between positive and negative polarity data signals on the common electrode varies significantly, the voltage on the common electrode can fluctuate significantly, leading to Excel crosstalk. Excel crosstalk refers to display noise, such as horizontal lines, that appears on the screen.

[0037] In order to reduce LCD screen crosstalk, the following measures are usually taken: (1) Improve the response speed of liquid crystal molecules, such as by improving the composition and structure of liquid crystal molecules or optimizing electric field driving technology to speed up the response speed of liquid crystal molecules and reduce image crosstalk. (2) Optimize circuit design to reduce the impact of signal interference and voltage fluctuations on the liquid crystal panel. (3) Adjust the driving algorithm. By improving the driving algorithm of the liquid crystal panel, image crosstalk can be reduced. (4) Increase the display refresh rate. Increasing the refresh rate of the display can reduce the residence time of liquid crystal molecules when switching images, thereby reducing the possibility of crosstalk.

[0038] The above measures are all applied in the process of manufacturing liquid crystal display panels, but it is difficult to alleviate the image crosstalk problem in the liquid crystal display panels that have already been manufactured.

[0039] Some embodiments of the present disclosure provide a display device, comprising a plurality of sub-pixels arranged in an array, a crosstalk detector, and a timing controller. The crosstalk detector is configured to: obtain display data of an image displayed by the display device; for each column of at least one column of the plurality of sub-pixels, obtain a plurality of display difference information based on the display data, wherein each display difference information is obtained based on the grayscale information between two adjacent rows of sub-pixels; based on the plurality of display difference information, determine whether there is crosstalk when the display device displays the image; and the timing controller is configured to adjust the polarity of the liquid crystal molecules of the plurality of sub-pixels in response to the display device displaying the image having the crosstalk. The display device can alleviate the problem of screen crosstalk that occurs during display due to hardware circuit or process defects in the panel manufacturing process, and can be applied to display devices that have already been manufactured.

[0040] Figure 2A FIG2 shows a schematic diagram of a display device 10 provided by at least one embodiment of the present disclosure.

[0041] like Figure 2A As shown, the display device 10 includes a display area 100 , a scan driver 200 , a data driver 300 , a timing controller (TCON) 400 , and a crosstalk detector 500 .

[0042] The display area 100 can display an image. The display area 100 can be implemented as a display panel. The display area 100 can include various display elements, such as light-emitting elements (e.g., light-emitting diodes). For example, the present disclosure can be applied to devices such as liquid crystal display devices (LCDs).

[0043] The display area 100 may include source lines (also referred to as "data lines") DL1 to DLm, gate lines (also referred to as scan lines) SL1 to SLn, and sub-pixels PX, where m and n are positive integers. Each sub-pixel PX may be arranged in an area defined by the source lines DL1 to DLm and the gate lines SL1 to SLn, thereby forming an array arrangement. The sub-pixels PX may be electrically connected to the source lines DL1 to DLm and the gate lines SL1 to SLn.

[0044] For example, the subpixel PX arranged in the first row and the first column can be connected to the first source line DL1 and the first gate line SL1. For another example, the subpixel PX arranged in the nth row and the mth column can be connected to the mth source line DLm and the nth gate line SLn. However, the subpixel PX is not limited thereto. For example, the subpixel PX can be connected to the gate line corresponding to the adjacent row (for example, the gate line corresponding to the previous row of the row including the subpixel PX and the gate line corresponding to the subsequent row).

[0045] In response to a scan signal supplied through a corresponding gate line, the subpixel PX may emit light at a brightness corresponding to a data signal supplied through a corresponding source line.

[0046] The plurality of sub-pixels PX may include a plurality of pixel rows PXR1 to PXRn. For example, the first pixel row PXR1 may include a plurality of sub-pixels PX connected to the first gate line SL1, and the second pixel row PXR2 may include a plurality of sub-pixels PX connected to the second gate line SL2. Similarly, the n-th pixel row PXRn may include a plurality of sub-pixels PX connected to the n-th gate line SLn.

[0047] The scan driver 200 can generate a scan signal (also referred to as a gate signal) based on the gate control signal GCS and provide the scan signal to the gate lines SL1 to SLn. Here, the gate control signal GCS can be a signal for controlling the operation of the scan driver 200 and can include a start signal and a clock signal, etc. For example, the scan driver 200 can use the clock signal to sequentially generate and output a scan signal corresponding to the start signal (for example, a scan signal having a waveform that is the same as or similar to the waveform of the start signal). The scan driver 200 can be implemented as a shift register, but is not limited thereto. The scan driver 200 can be formed on an area of ​​the display area 100, or can be implemented as an integrated circuit and can be mounted on a flexible circuit board to be connected to the display area 100.

[0048] The data driver 300 may be implemented as an integrated circuit (e.g., a driver IC) or may be mounted on a flexible circuit board to be connected to the display area 100. The data driver 300 may generate a data signal (or voltage) based on the image data DATA2 and the data control signal DCS, and may provide the data signal to the pixel rows PXR1 to PXRn through the source lines DL1 to DLm. Here, the data control signal DCS is a signal for controlling the operation of the data driver 300 and may include a load signal, a start signal, a clock signal, and the like.

[0049] The image data DATA2 supplied to the data driver 300 may include grayscale information corresponding to each of the pixel rows PXR1 to PXRn. The data driver 300 may supply voltages to the pixel rows PXR1 to PXRn corresponding to the grayscale data.

[0050] The timing controller 400 may receive input image data DATA1 (e.g., RGB data) and input control signals for each frame from an external processor (e.g., a graphics processor). The input image data DATA1 may include grayscale values ​​corresponding to each of the subpixels PX. The input control signals may include a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a main clock signal MCLK, and a data enable signal DE.

[0051] The timing controller 400 can generate image data DATA2 based on the input image data DATA1. Specifically, the timing controller 400 can render the input image data DATA1 so that the input image data DATA1 corresponds to the specifications of the display device 10. For example, an external processor can provide a red grayscale value, a green grayscale value, and a blue grayscale value for each unit point. The image data rendered or not rendered by the timing controller 400 can be provided to the data driver 300 or the crosstalk detector 500.

[0052] In addition, the timing controller 400 may generate a gate control signal GCS and a data control signal DCS based on the input control signal. The timing controller 400 may provide the gate control signal GCS to the scan driver 200 and may provide the data control signal DCS to the data driver 300.

[0053] The crosstalk detector 500 obtains multiple display difference information based on the image data DATA2. Each display difference information is derived based on the grayscale information between two adjacent rows of sub-pixels. Based on this multiple display difference information, the detector determines whether crosstalk is present when the display device displays the image. In response to the presence of crosstalk in the image displayed by the display device, the timing controller 400 adjusts the polarity information of the liquid crystal molecules in the multiple sub-pixels. The timing controller 400 then provides the adjusted polarity information of the liquid crystal molecules to the data driver 300. The data driver 300 adjusts the polarity of the liquid crystal molecules in the multiple sub-pixels based on the polarity information and provides voltages to the corresponding pixel rows PXR1 to PXRn based on the polarity information and the image data DATA2.

[0054] exist Figure 2A In the embodiment, the timing controller 400 and the data driver 300 are implemented as separate components, but are not limited thereto. For example, the timing controller 400 may be implemented together with the data driver 300 as one integrated circuit (eg, a timing controller embedded driver (TED)).

[0055] like Figure 2A As shown in , the crosstalk detector 500 may be a component included in the timing controller 400. For example, the crosstalk detector 500 may be implemented as an integrated circuit together with the timing controller 400, or may be included in the timing controller 400 so that some or all of the crosstalk detector 500 is implemented as software. However, the crosstalk detector 500 is not limited thereto. For example, the crosstalk detector 500 and the timing controller 400 may be implemented as separate components, or may be implemented in one component.

[0056] Figure 2B FIG. 1 shows a schematic diagram of a timing controller 2000 provided by at least one embodiment of the present disclosure. Figure 2B In the example of , the crosstalk detector 201 and the timing controller 2000 can be separate components. Figure 2A In the example of FIG. 4 , the crosstalk detector 500 is implemented in the timing controller 400 .

[0057] like Figure 2B As shown, the crosstalk detector 201 is configured to: obtain display data of an image displayed by a display device; obtain multiple display difference information for each of at least one column of multiple sub-pixels based on the display data, each display difference information being derived based on the grayscale information between two adjacent rows of sub-pixels; and determine whether crosstalk exists in the image displayed by the display device based on the multiple display difference information. The timing controller 2000 is configured to: in response to the presence of crosstalk in the image displayed by the display device, adjust the polarity information of the liquid crystal molecules of the multiple sub-pixels.

[0058] The display device can determine whether crosstalk exists based on the grayscale information between two adjacent rows of sub-pixels. When crosstalk exists, the polarity of the liquid crystal molecules is adjusted to compensate for the display voltage of the display device, thereby alleviating the crosstalk of the screen, ensuring the accuracy of the displayed image, and improving the display effect of the LCD panel.

[0059] In some embodiments of the present disclosure, the arrangement of display data matches the arrangement of sub-pixels in the display device, and the arrangement of display data conforms to the structure of the display device. For example, the display device is a liquid crystal display panel. For example, in Figure 2B In the example of , the display data is the source data obtained by remapping the input image data DATA1 according to the gate drive hardware design arrangement and source drive hardware design arrangement of the LCD panel. Figure 2B As shown, the timing controller 2000 includes a pixel value reordering and mapping module 203. The pixel value reordering and mapping module 203 remaps the input image data into a first format to obtain low-bit data that conforms to the LCD structure. The low-bit data is used to drive the source lines of the liquid crystal display panel based on the low-bit data, so that the liquid crystal display panel displays an image. The low-bit data is, for example, the image data DATA2 described above. The pixel value reordering and mapping module 203 also remaps the input image data into a second format to obtain source data in a data format suitable for crosstalk detection, which is provided to the crosstalk detector 201. For example, the source data in the second format is the intensity of the source control voltage of an entire row of sub-pixels (or the grayscale value of an entire row of sub-pixels). This is intermediate data processed by the pixel value reordering and mapping module 203. The low-bit data in the first format is data obtained by splitting a complete row of source data into segments according to the number of source lines. For example, the data driver includes multiple source line driver chips, and each segment of data corresponds to a source line driver chip to drive the source line to provide the segment of data to the sub-pixels.

[0060] Regarding methods for remapping input image data to obtain display data that conforms to the LCD structure, reference can be made to relevant literature and will not be detailed in this disclosure. The display data, for example, includes the grayscale values ​​of each of multiple sub-pixels. The following describes embodiments of the present disclosure using a display device including a liquid crystal display panel as an example.

[0061] In some embodiments of the present disclosure, the display difference information may refer to, for example, the difference between the source voltages provided to two adjacent rows of sub-pixels. For example, the grayscale value is related to the source voltage, so the grayscale value may be used to represent the difference between the source voltages provided to two adjacent rows of sub-pixels. For example, two adjacent rows of sub-pixels refer to two adjacent rows of sub-pixels in a display row of a liquid crystal display panel, or refer to, for example, Figure 1A In the example, multiple gate lines are connected to multiple rows of sub-pixels in a one-to-one correspondence, and multiple gate lines are turned on row by row. Two adjacent rows of sub-pixels are two rows of sub-pixels connected by two gate lines that are turned on successively (the two gate lines that are turned on successively can be, for example, two adjacent gate lines in the physical layout).

[0062] For example, a liquid crystal display panel includes multiple rows and columns of sub-pixels. The multiple columns of sub-pixels are sequentially traversed. For each column of sub-pixels, multiple display difference information between multiple adjacent rows of sub-pixels in the column of sub-pixels is calculated, with each adjacent row of sub-pixels corresponding to one display difference information. For example, for each column of sub-pixels, the difference between the grayscale values ​​corresponding to the two adjacent rows of sub-pixels is sequentially calculated, and the multiple differences are used as multiple display difference information. For another example, for each column of sub-pixels, multiple adjacent rows of sub-pixels are randomly searched from the multiple rows of sub-pixels to obtain multiple display difference information. For another example, at least one column of sub-pixels is selected from the multiple columns of sub-pixels, and for each column of the at least one column of sub-pixels, multiple display difference information between multiple adjacent rows of sub-pixels in the column of sub-pixels is calculated.

[0063] In some embodiments of the present disclosure, for example, if multiple pieces of display difference information satisfy a preset crosstalk condition, then crosstalk is present in the image displayed by the liquid crystal display panel. The preset crosstalk condition is, for example, determined by those skilled in the art based on experience. For example, the preset crosstalk condition may include the number of pieces of display difference information that are greater than a preset value reaching a preset number.

[0064] like Figure 2B As shown, the timing controller 2000 may include a timing adjustment module 222. The crosstalk detector 201 provides an indication signal to the timing adjustment module 222 based on whether crosstalk exists in the image displayed by the display device. For example, the indication signal includes a first indication signal and a second indication signal, where the first indication signal and the second indication signal are different. The crosstalk detector 500 provides the first indication signal to the timing adjustment module 222 in response to the presence of crosstalk in the image displayed by the display device.

[0065] The timing adjustment module 202 adjusts the polarity information of the liquid crystal molecules of the plurality of sub-pixels according to the first indication signal. For example, the polarity information of the liquid crystal molecules of each of the plurality of sub-pixels is adjusted from the initial polarity information to the target polarity information. For another example, the polarity information of the liquid crystal molecules of some of the plurality of sub-pixels is adjusted from the initial polarity information to the target polarity information. For example, the initial polarity information is positive polarity and the target polarity information is negative polarity, or the initial polarity information is negative polarity and the target polarity information is positive polarity. For example, if the timing adjustment module 222 receives the first indication signal, the polarity information of the liquid crystal molecules of each of the plurality of sub-pixels is reversed, so that the polarity of the liquid crystal molecules is reversed.

[0066] If it is determined that there is no crosstalk in the image displayed by the display device, the crosstalk detector 201 provides a second indication signal to the timing adjustment module 222. In response to obtaining the second indication signal, the timing adjustment module 222 does not adjust the polarity information of the liquid crystal molecules of the multiple sub-pixels, but maintains the initial polarity information of the liquid crystal molecules of the multiple sub-pixels.

[0067] In some embodiments of the present disclosure, for example, the first indication signal is a digital signal 1, and the second indication signal is a digital signal 0. For another example, the first indication signal is a high level, and the second indication signal is a low level. Those skilled in the art may use any two different signals to represent the first indication signal and the second indication signal, respectively, and the present disclosure does not limit the first indication signal and the second indication signal.

[0068] like Figure 2B As shown, the timing controller 2000 further includes a timing generation module 212 .

[0069] The timing generation module 212 is configured to provide first polarity information to the crosstalk detector, where the first polarity information indicates polarities of liquid crystal molecules in the plurality of sub-pixels.

[0070] In this embodiment, the crosstalk detector 201 is configured to determine whether crosstalk exists in an image displayed by the display device based on a plurality of display difference information and the first polarity information.

[0071] In this embodiment, the crosstalk detector 201 determines whether crosstalk is present in the image displayed by the display device based on the first polarity information (indicating the initial polarity of the liquid crystal molecules) and multiple display difference information provided by the timing generation module. Determining the presence of crosstalk based on the polarity of the liquid crystal molecules can detect the difference in coupling between positive and negative polarity data signals on the common electrode, thereby improving the accuracy of crosstalk detection.

[0072] For example, the first polarity information provided by the timing generation module 212 to the crosstalk detector 201 is the polarity information of the liquid crystal molecules in multiple sub-pixels represented in binary. For example, 0 indicates that the liquid crystal molecules of the sub-pixel are positive polarity, and 1 indicates that the liquid crystal molecules are negative polarity. For example, if the first polarity information is 11110000..., then the polarity of the liquid crystal molecules in the 0th to 3rd columns of the sub-pixels in the first row of sub-pixels is negative polarity, and the polarity of the liquid crystal molecules in the 4th to 7th columns of the sub-pixels in the first row of sub-pixels is positive polarity. In some embodiments of the present disclosure, the timing generation module 212 can, for example, generate the first polarity information according to a pre-configuration by a person skilled in the art.

[0073] In some embodiments of the present disclosure, the crosstalk detector 201 receives the first polarity information provided by the timing generation module 212 and determines whether crosstalk exists in the image displayed by the display device according to the first polarity information and a plurality of display difference information.

[0074] In some embodiments of the present disclosure, the display data includes the grayscale value presented by each sub-pixel, and each display difference information includes the difference between the grayscale values ​​presented by the sub-pixels in two adjacent rows. For example, the difference between the grayscale value of the sub-pixel in the first row and the first column and the grayscale value of the sub-pixel in the second row and the first column is a display difference information. Similarly, the difference between the grayscale value of the sub-pixel in the first row and the second column and the grayscale value of the sub-pixel in the second row and the second column is a display difference information; the difference between the grayscale value of the sub-pixel in the second row and the first column and the grayscale value of the sub-pixel in the third row and the first column is a display difference information.

[0075] For example, two adjacent rows of sub-pixels include a first row of sub-pixels and a second row of sub-pixels. When the first row of sub-pixels is charged, the first row of sub-pixels is provided with a first voltage. When the second row of sub-pixels is charged, the second row of sub-pixels is provided with a second voltage. The crosstalk detector 201 determines the direction of voltage change based on the first polarity information. The voltage change direction is determined based on the first voltage and the second voltage. The voltage change direction includes voltage pull-up and voltage pull-down. And based on multiple display difference information and the voltage change direction corresponding to each of the multiple display difference information, it is determined whether there is crosstalk in the image displayed by the display device.

[0076] For example, when charging the first row of sub-pixels, the source line provides a first voltage to charge the first row of sub-pixels; when charging the second row of sub-pixels, the source line provides a second voltage to charge the second row of sub-pixels.

[0077] In some embodiments of the present disclosure, voltage pull-up includes: two adjacent rows of sub-pixels are both negative, and the grayscale value of the sub-pixels in the first row is greater than the grayscale value of the sub-pixels in the second row; or two adjacent rows of sub-pixels are both positive, and the grayscale value of the sub-pixels in the first row is less than the grayscale value of the sub-pixels in the second row, and the turn-on time of the sub-pixels in the first row is earlier than the turn-on time of the sub-pixels in the second row. In some embodiments of the present disclosure, voltage pull-down includes: two adjacent rows of sub-pixels are both negative, and the grayscale value of the sub-pixels in the first row is less than the grayscale value of the sub-pixels in the second row; or two adjacent rows of sub-pixels are both positive, and the grayscale value of the sub-pixels in the first row is greater than the grayscale value of the sub-pixels in the second row.

[0078] The grayscale value displayed by the sub-pixels is controlled by the charging voltage on the source line. If two adjacent rows of sub-pixels are both negative, and the grayscale value displayed by the first row of sub-pixels turned on earlier is greater than the grayscale value displayed by the second row of sub-pixels, the charging voltage on the source line is pulled up. Alternatively, if two adjacent rows of sub-pixels are both positive, and the grayscale value displayed by the first row of sub-pixels turned on earlier is less than the grayscale value displayed by the second row of sub-pixels, the charging voltage on the source line is pulled up.

[0079] If the two adjacent rows of sub-pixels are both negative polarity, and the grayscale value presented by the first row of sub-pixels turned on earlier is smaller than the grayscale value presented by the second row of sub-pixels, the charging voltage on the source line is pulled down; or if the two adjacent rows of sub-pixels are both positive polarity, and the grayscale value presented by the first row of sub-pixels turned on earlier is larger than the grayscale value presented by the second row of sub-pixels, the charging voltage on the source line is pulled down.

[0080] For example, two adjacent rows of subpixels in the same column are subpixel A (an example of a first row of subpixels) and subpixel B (an example of a second row of subpixels). Subpixel A is located in the row before subpixel B, that is, subpixel A is turned on earlier than subpixel B. The crosstalk detector 201 determines, based on the polarity information and grayscale values ​​of subpixel A and subpixel B, a first voltage on the source line to charge subpixel A when subpixel A is turned on, and a second voltage on the source line to charge subpixel B when subpixel B is turned on. Since subpixel A is turned on earlier than subpixel B, the voltage provided by the source line changes from the first voltage to the second voltage. For example, the direction of voltage change is determined based on the first voltage and the second voltage. For example, if the first voltage is less than the second voltage, the direction of voltage change is voltage pull-up; if the first voltage is greater than the second voltage, the direction of voltage change is voltage pull-down.

[0081] Figure 3 A schematic diagram showing a voltage variation method provided by at least one embodiment of the present disclosure is shown; Figure 4 A schematic diagram illustrating another voltage variation method provided by at least one embodiment of the present disclosure is shown.

[0082] like Figure 3 and 4As shown, the horizontal axis T represents the time axis, and the vertical axis V represents the voltage axis. Since voltage is related to grayscale value, grayscale value is used to represent voltage, and grayscale is used as a form of voltage quantization. For example, 255 on the voltage axis represents the voltage value corresponding to the grayscale value of the positive polarity sub-pixel being 255. That is, the voltage axis [0,255] represents the voltage values ​​corresponding to the grayscale values ​​of the positive polarity sub-pixel being [0,255]. For example, -255 on the voltage axis represents the voltage value corresponding to the grayscale value of the negative polarity sub-pixel being 255. That is, the voltage axis [-255,0] represents the voltage values ​​corresponding to the grayscale values ​​of the negative polarity sub-pixel being [255,0].

[0083] like Figure 3 As shown, if the first polarity information indicates that the liquid crystal molecules of sub-pixel A and sub-pixel B are both negative, then the grayscale value increases from small to large as the source line charges sub-pixel A and then charges sub-pixel B, and the voltage shows a downward trend. Therefore, the voltage change direction is downward.

[0084] like Figure 3 As shown, if the first polarity information indicates that the liquid crystal molecules of sub-pixel C and sub-pixel D are both positive, then the grayscale value decreases from large to small as the source line charges sub-pixel C and then the source line charges sub-pixel D, and the voltage shows a downward trend. Therefore, the voltage change direction is voltage pull-down.

[0085] like Figure 4 As shown, if the first polarity information indicates that the liquid crystal molecules of sub-pixel A and sub-pixel B are both negative, then the grayscale value decreases from large to small, and the voltage tends to be pulled up. Therefore, the voltage change direction is voltage pull-up.

[0086] like Figure 4 As shown, if the first polarity information indicates that the liquid crystal molecules of sub-pixel C and sub-pixel D are both positive, then the grayscale value increases from small to large as the source line charges sub-pixel C and then charges sub-pixel D, and the voltage shows a pull-up trend. Therefore, the voltage change direction is voltage pull-up.

[0087] In other embodiments of the present disclosure, voltage pull-up includes the sub-pixels in the first row having negative polarity and the sub-pixels in the second row having positive polarity, and the sub-pixels in the first row being turned on earlier than the sub-pixels in the second row. For example, in two adjacent rows of sub-pixels in the same column, sub-pixel A is turned on earlier than sub-pixel B, sub-pixel A is negative polarity and sub-pixel B is positive polarity, and the direction of voltage change of the charging voltage provided by the source line is voltage pull-up.

[0088] In other embodiments of the present disclosure, voltage pull-down includes the first row of sub-pixels being positive polarity, the second row of sub-pixels being negative polarity, and the first row of sub-pixels being turned on earlier than the second row of sub-pixels. For example, in two adjacent rows of sub-pixels in the same column, sub-pixel A is turned on earlier than sub-pixel B, sub-pixel A is positive polarity, and sub-pixel B is negative polarity, and the direction of voltage change of the charging voltage provided by the source line is voltage pull-down.

[0089] In some embodiments of the present disclosure, each display difference information includes a first difference between the grayscale values ​​of the two adjacent rows of sub-pixels, and the crosstalk detector 201 is configured to: obtain a first number of first differences greater than a first threshold in the voltage pull-up situation and a second number of first differences greater than a second threshold in the voltage pull-down situation; and determine whether there is crosstalk in the image displayed by the display device based on the first number and the second number.

[0090] For example, every two adjacent sub-pixels in the display device are traversed to find adjacent sub-pixels in the voltage pull-up state and adjacent sub-pixels in the voltage pull-down state. Then, for each pair of adjacent sub-pixels in the voltage pull-up state, a comparison is made to see whether the first difference between the two adjacent sub-pixels is greater than a first threshold; and for each pair of adjacent sub-pixels in the voltage pull-down state, a comparison is made to see whether the first difference between the two adjacent sub-pixels is greater than a second threshold, thereby obtaining the first quantity and the second quantity.

[0091] In some embodiments of the present disclosure, the crosstalk detector 201 is configured to: calculate a second difference between the first number and the second number; in response to the second difference being greater than a preset threshold, cumulatively count the second difference to obtain a cumulative count value; and in response to the cumulative count value being greater than a polarity reversal threshold, determine that crosstalk exists in the image displayed by the display device.

[0092] For example, the second difference refers to the absolute value of the difference between the first number and the second number. If the second difference is greater than a preset threshold, the second difference is cumulatively counted to obtain a cumulative count value, and the preset step size of the cumulative count is, for example, 1. That is, if the second difference is greater than the preset threshold, the cumulative count value is increased by 1. If the cumulative count value (i.e., the result of the cumulative count) is greater than the polarity reversal threshold, it is determined that crosstalk exists in the image displayed by the display device. For the calculation of the cumulative count value, please refer to Figure 5 Example of .

[0093] It should be noted that the first threshold, the second threshold, the preset threshold and the polarity reversal threshold in the present disclosure can all be set by those skilled in the art based on actual needs and experience.

[0094] Return Reference Figure 2BThe timing adjustment module 222 is configured to adjust the first polarity information to the second polarity information in response to obtaining the first indication signal; and control the polarity of the liquid crystal molecules of the plurality of sub-pixels based on the second polarity information.

[0095] For example, the first indication signal is 1, the first polarity information is 1111000..., when the timing adjustment module 222 receives the indication signal 1, it adjusts the first polarity information 1111000... to polarity information 11110000 (an example of the second polarity information). The timing adjustment module 222 provides the adjusted polarity information to, for example, a panel driving device. In some embodiments of the present disclosure, the display device further includes: a panel driving device coupled to the timing controller 2000, the panel driving device being configured to drive the liquid crystal display panel to display an image according to the adjusted polarity information of the plurality of liquid crystal molecules. For example, the panel driving device is Figure 2A The data driver 300 in the panel driving device is configured to drive the image data according to the adjusted polarity information and the image data (eg, Figure 2B The panel driver determines a target voltage on a source line connected to the LCD panel based on the adjusted polarity information and the image data, and then provides the target voltage to the source line provided by the LCD panel, thereby driving the LCD panel to display the image.

[0096] Those skilled in the art may set an adjustment rule for the polarity information based on experience, so as to adjust the first polarity information to the second polarity information according to the adjustment rule. The embodiments of the present disclosure do not limit the adjustment rule.

[0097] In some embodiments of the present disclosure, crosstalk detector 201 is further configured to: in response to the display device displaying an image without crosstalk, provide a second indication signal to the timing adjustment module, where the second indication signal is different from the first indication signal. In this example, timing adjustment module 222 is configured to, in response to obtaining the second indication signal, determine that the polarity information of the liquid crystal molecules of the plurality of sub-pixels is the first polarity information.

[0098] For example, if a binary value of 0 is used as the second indication signal and a binary value of 1 is used as the first indication signal, and the indication signal provided by the crosstalk detector 201 to the timing adjustment module 222 is a signal of 0, the timing adjustment module 222 determines the polarity of the liquid crystal molecules of the plurality of sub-pixels as the first polarity information. For example, the timing adjustment module 222 provides the first polarity information to the panel driving device, so that the panel driving device drives the display device to display an image based on the first polarity information and the image data.

[0099] Figure 5 A schematic diagram of the arrangement of sub-pixels of a liquid crystal display panel provided by at least one embodiment of the present disclosure is shown. Figure 5To illustrate the implementation of some embodiments of the present disclosure.

[0100] like Figure 5 As shown, the structure of the liquid crystal display panel is that each row of sub-pixels is coupled to the same gate line, and each column of sub-pixels is coupled to the same source line. The gate line is used to control whether the sub-pixels in the row are turned on or off, and the source line is used to charge the turned-on sub-pixels. For example, the liquid crystal pixel panel includes n rows and m columns of sub-pixels. The first row of sub-pixels is coupled to the gate line L0, the second row of sub-pixels is coupled to the gate line L1, and so on, until the nth row of sub-pixels is coupled to the gate line L(n-1); the first column of sub-pixels is coupled to the source line S0, the second column of sub-pixels is coupled to the source line S1, and so on, until the mth column of sub-pixels is coupled to the source line S(m-1).

[0101] When detecting display difference information, the polarity of the source line and the polarity of the gate line need to be comprehensively considered to determine the direction of voltage change between the current row of sub-pixels and the previous row of sub-pixels.

[0102] like Figure 5 As shown, the polarity of each sub-pixel can be determined by the voltage of the source line and the voltage of the gate line. For example, the gate line can provide a polarity reversal signal, and if the hardware obtains the polarity reversal signal, it changes the positive and negative of the driving voltage on the source line.

[0103] For example, for the second column S1, the voltage on the source line is a negative voltage. For the first row L0, a negative voltage is provided on the gate line. This negative voltage can serve as a polarity reversal signal, causing the voltage on the source line to reverse. For example, for the sub-pixel 501 in the first row and second column, since the gate line L0 provides a positive voltage, the direction of the voltage on the source line S1 remains unchanged and remains a negative voltage. Therefore, the sub-pixel 501 in the first row and second column has a negative polarity. For another example, for the sub-pixel 502 in the second row and second column, since the gate line L1 provides a positive voltage, the direction of the voltage on the source line S1 remains unchanged and remains a negative voltage. Therefore, the sub-pixel 502 in the second row and second column has a negative polarity. For example, for the sub-pixel 503 in the third row and second column, since the gate line L2 is a negative voltage, the direction of the voltage on the source line S1 changes from a negative voltage to a positive voltage. Therefore, the sub-pixel 503 in the third row and second column has a positive polarity.

[0104] In some embodiments of the present disclosure, if the polarity of two adjacent rows of sub-pixels in the same column is the same, it is called same-polarity detection; if the polarity of two adjacent rows of sub-pixels in the same column is different, it is called different-polarity detection. For example, if sub-pixel 501 and sub-pixel 502 have the same polarity, then sub-pixel 501 and sub-pixel 502 are in same-polarity detection. For example, if sub-pixel 502 and sub-pixel 503 have different polarities, then sub-pixel 502 and sub-pixel 503 are in different-polarity detection.

[0105] For same-polarity detection, if the grayscale value of the sub-pixel turned on first in two adjacent rows of negative polarity sub-pixels is greater than the grayscale value of the sub-pixel turned on later, the voltage is pulled up; if the grayscale value of the sub-pixel turned on first in two adjacent rows of positive polarity sub-pixels is less than the grayscale value of the sub-pixel turned on later, the voltage is pulled up. Conversely, if the grayscale value of the sub-pixel turned on first in two adjacent rows of negative polarity sub-pixels is less than the grayscale value of the sub-pixel turned on later, the voltage is pulled down; if the grayscale value of the sub-pixel turned on first in two adjacent rows of positive polarity sub-pixels is greater than the grayscale value of the sub-pixel turned on later, the voltage is pulled down.

[0106] For polarity detection, if the sub-pixel turned on first in two adjacent rows is negative polarity and the sub-pixel turned on later is positive polarity, the voltage is pulled up; if the sub-pixel turned on first in two adjacent rows is positive polarity and the sub-pixel turned on later is negative polarity, the voltage is pulled down.

[0107] In some embodiments of the present disclosure, the method described below may be performed to determine whether crosstalk exists in an image displayed by a liquid crystal display panel.

[0108] For example, for adjacent subpixel rows on each source line, in the voltage pull-up scenario, if the difference ABS(diff_p) between the grayscale values ​​of two adjacent subpixels is greater than the first threshold diff_thr_p, then the count value cross_talk_count_p for the voltage pull-up scenario is incremented by 1. That is, if ABS(diff_p)>diff_thr_p, then cross_talk_count_p=cross_talk_count_p+1. Similarly, in the voltage pull-down scenario, if the difference ABS(diff_n) between the grayscale values ​​of two adjacent subpixels is greater than the second threshold diff_thr_n, then the count value cross_talk_count_n for the voltage pull-down scenario is incremented by 1. That is, if ABS(diff_n)>diff_thr_n, then cross_talk_count_n=cross_talk_count_n+1.

[0109] For example, for sub-pixel 501 and sub-pixel 502, sub-pixel 501 has a negative polarity and sub-pixel 502 has a negative polarity. Sub-pixel 501 is turned on earlier than sub-pixel 502. If the grayscale value presented by sub-pixel 501 is less than the grayscale value presented by sub-pixel 502, this is a voltage pull-down situation. The absolute value of the difference between the grayscale value of sub-pixel 501 and the grayscale value of sub-pixel 502 is calculated as the difference ABS(diff_n), and then ABS(diff_n) is compared with diff_thr_n. After detecting sub-pixel 501 and sub-pixel 502, detection is continued for sub-pixel 502 and sub-pixel 503. Similarly, sub-pixel 502 has a negative polarity and sub-pixel 503 has a positive polarity. Therefore, the period from the turning on of sub-pixel 502 to the turning on of sub-pixel 503 is a voltage pull-up situation. The absolute value of the difference between the grayscale value of sub-pixel 502 and the grayscale value of sub-pixel 503 is calculated as the difference ABS(diff_p), and then ABS(diff_p) is compared with diff_thr_p. And so on. After each update of the count value cross_talk_count_n or the count value cross_talk_count_p, the difference ABS(count_diff) between cross_talk_count_p and cross_talk_count_p is calculated. The difference ABS(count_diff) refers to the absolute value of the difference between cross_talk_count_p and cross_talk_count_p, for example. If ABS(count_diff) is greater than a preset threshold, the cumulative count value cross_talk_stastistic_count is incremented by 1. That is, if (ABS(count_diff)>count_thr), then cross_talk_stastistic_count=cross_talk_stastistic_count+1. Until it is detected that the accumulated count value cross_talk_stastistic_count is greater than the preset polarity flip threshold polarity_flip_thr, a first indication signal is returned, for example, the first indication signal is 1. If the accumulated count value cross_talk_stastistic_count is not greater than the preset polarity flip threshold polarity_flip_thr, a second indication signal is returned, for example, the first indication signal is 2.

[0110] In this embodiment, for example, two adjacent rows of sub-pixels in each column may be traversed sequentially in the order of column S0 and column S1 until the accumulated count value cross_talk_stastistic_count exceeds the preset polarity flip threshold polarity_flip_thr, and a first indication signal is returned. If, after traversing each sub-pixel of the liquid crystal display panel, the accumulated count value cross_talk_stastistic_count is still not greater than the polarity flip threshold polarity_flip_thr, then it is determined that crosstalk does not exist.

[0111] In some embodiments of the present disclosure, crosstalk may refer to table crosstalk. Some embodiments of the present disclosure can detect whether table crosstalk exists in an image displayed by a liquid crystal display panel. If table crosstalk exists, the voltage value is compensated by changing the polarity, thereby improving the table crosstalk problem.

[0112] Figure 6 A schematic diagram of a timing controller provided by at least one embodiment of the present disclosure is shown. The timing controller is configured to adjust polarity information of liquid crystal molecules of the plurality of sub-pixels in response to crosstalk in an image displayed by the display device.

[0113] like Figure 6 As shown, the timing controller 600 includes a crosstalk detector 601. The crosstalk detector 601 is configured to: obtain display data of an image displayed by a display device; obtain, for each column of at least one column of a plurality of sub-pixels, a plurality of display difference information based on the display data, each piece of display difference information being obtained based on grayscale information between two adjacent rows of sub-pixels; and determine, based on the plurality of display difference information, whether crosstalk exists in the image displayed by the display device.

[0114] In addition to the crosstalk detector 601, the timing controller 600 may also include a timing adjustment module 604. The crosstalk detection module 601 is further configured to provide a first indication signal to the timing adjustment module in response to the presence of crosstalk in the image displayed by the display device. The timing adjustment module 604 is configured to adjust the polarity information of the liquid crystal molecules of the plurality of sub-pixels in response to receiving the first indication signal.

[0115] For example, the timing controller 600 is coupled to a panel driving device 602. The panel driving device 602 may be similar to Figure 2A For example, the timing adjustment module 604 provides polarity information to the panel driver 602 based on the first indication signal. The polarity information is used to control the polarity of the liquid crystal molecules of the plurality of sub-pixels. The panel driver is configured to drive the display device to display an image based on the low-bit data and the polarity information.

[0116] For example, the timing adjustment module 604 can provide different polarity information to the panel driver device based on the indication signal returned by the crosstalk detector 601. For example, if the indication signal is 0, the first polarity information is provided to the panel driver device 602. If the indication signal is 1, the second polarity information is provided to the panel driver device 602. The second polarity information is polarity information adjusted from the first polarity information. The panel driver device 602 determines the direction of the voltage signal on the source line provided to the display device based on the polarity information, and determines the magnitude of the voltage signal on the source line provided to the display device based on the low-bit data, thereby driving the display device to display an image.

[0117] like Figure 6 As shown, the timing controller 600 may further include a timing generation module 603, configured to provide first polarity information to a crosstalk detector, the first polarity information indicating the polarity of the liquid crystal molecules in the plurality of sub-pixels, and the crosstalk detector being configured to determine whether crosstalk exists when the display device displays the image based on the plurality of display difference information and the first polarity information.

[0118] like Figure 6 As shown, the timing controller 600 may also include a pixel value re-arrangement mapping module, a dithering module, a color correction module, and the like. For example, the color correction module performs color correction on the input video stream data. The dithering module converts the high-bit data after the previous module operation into low-bit data of the bit width required for panel display. The pixel value re-arrangement mapping module re-maps and arranges the low-bit data after dithering according to the hardware design of the LCD panel to meet the requirements of the LCD panel display. The crosstalk detector detects table crosstalk on the source data mapped and arranged into a second format that meets the panel structure arrangement. For example, the polarity of the liquid crystal is detected in combination with the first polarity information on the source, gate, and timing generation module. When it is detected that it meets the table crosstalk characteristics, a first indication signal is returned, the initial first polarity information is adjusted, and the adjusted second polarity information is provided to the panel driver. The control panel performs polarity adjustment to compensate for the table crosstalk of the panel, thereby improving the table crosstalk problem of the panel.

[0119] In some embodiments of the present disclosure, two adjacent rows of sub-pixels include a first row of sub-pixels and a second row of sub-pixels. When the first row of sub-pixels is charged, a first voltage is provided to the first row of sub-pixels. When the second row of sub-pixels is charged, a second voltage is provided to the second row of sub-pixels. The crosstalk detector is configured to: determine a voltage change direction based on first polarity information, wherein the voltage change direction is determined based on the first voltage and the second voltage, wherein the voltage change direction includes voltage pull-up and voltage pull-down; and determine whether there is crosstalk in an image displayed by a display device based on multiple display difference information and the voltage change direction corresponding to each of the multiple display difference information.

[0120] In some embodiments of the present disclosure, voltage pull-up includes one of the following situations: two adjacent rows of sub-pixels are both negative polarity, and the grayscale value of the sub-pixel in the first row is greater than the grayscale value of the sub-pixel in the second row; two adjacent rows of sub-pixels are both positive polarity, and the grayscale value of the sub-pixel in the first row is less than the grayscale value of the sub-pixel in the second row; or the sub-pixel in the first row is negative polarity, the sub-pixel in the second row is positive polarity, and the turn-on time of the sub-pixel in the first row is earlier than the turn-on time of the sub-pixel in the second row.

[0121] In some embodiments of the present disclosure, voltage pull-down includes one of the following situations: two adjacent rows of sub-pixels are both negative polarity, and the grayscale value of the sub-pixels in the first row is less than the grayscale value of the sub-pixels in the second row; two adjacent rows of sub-pixels are both positive polarity, and the grayscale value of the sub-pixels in the first row is greater than the grayscale value of the sub-pixels in the second row; or the sub-pixels in the first row are positive polarity, the sub-pixels in the second row are negative polarity, and the turn-on time of the sub-pixels in the first row is earlier than the turn-on time of the sub-pixels in the second row.

[0122] In some embodiments of the present disclosure, each display difference information includes a first difference between the grayscale values ​​of two adjacent rows of sub-pixels, and the crosstalk detector is configured to: obtain a first number of first differences greater than a first threshold in a voltage pull-up situation and a second number of first differences greater than a second threshold in a voltage pull-down situation; and determine whether there is crosstalk in the image displayed by the display device based on the first number and the second number.

[0123] In some embodiments of the present disclosure, the crosstalk detector is configured to: calculate a second difference between the first number and the second number; in response to the second difference being greater than a preset threshold, increase the cumulative count value by a preset step size; and in response to the cumulative count value being greater than a polarity reversal threshold, determine that crosstalk exists in the image displayed by the display device.

[0124] In some embodiments of the present disclosure, the crosstalk detector is further configured to: in response to the display device displaying an image without crosstalk, provide a second indication signal to the timing adjustment module, wherein the second indication signal is different from the first indication signal, and the timing adjustment module is further configured to: in response to obtaining the second indication signal, determine that the polarity information of the liquid crystal molecules of multiple sub-pixels is the first polarity information.

[0125] Another aspect of the present disclosure provides a display driving method for a display device, wherein the display device includes a plurality of sub-pixels arranged in an array.

[0126] Figure 7 A flowchart of a display driving method provided by at least one embodiment of the present disclosure is shown.

[0127] like Figure 7 As shown, the display driving method includes steps S701 to S704.

[0128] Step S701: Acquire display data of an image displayed by a display device.

[0129] Step S702: for each column of at least one column of the plurality of sub-pixels, obtain a plurality of display difference information according to the display data, where each piece of display difference information is obtained based on the grayscale information between two adjacent rows of sub-pixels.

[0130] Step S703: Based on the plurality of display difference information, determine whether crosstalk exists in the image displayed by the display device.

[0131] Step S704 : In response to the presence of crosstalk in an image displayed by the display device, adjusting polarity information of liquid crystal molecules of a plurality of sub-pixels to drive the display device according to the polarity of the liquid crystal molecules.

[0132] The method can improve the crosstalk phenomenon that occurs during display due to hardware circuit or process defects in the panel manufacturing process.

[0133] In step S701 , for example, source data that complies with the LCD panel structure and is provided by a pixel value rearrangement mapping module is obtained.

[0134] For step S702, the display difference information may refer to, for example, the difference between the source voltages provided to two adjacent rows of sub-pixels. For example, grayscale values ​​are related to source voltages, and thus grayscale values ​​may be used to represent the difference between the source voltages provided to two adjacent rows of sub-pixels.

[0135] In step S703 , for example, it is determined whether the plurality of display difference information meets the characteristics of table crosstalk. If so, it is determined whether the image displayed by the liquid crystal display panel has table crosstalk.

[0136] In step S704 , for example, if crosstalk exists in the image displayed by the liquid crystal display panel, the polarity information of the liquid crystal molecules of the plurality of sub-pixels is adjusted.

[0137] In the embodiments of the present disclosure, the timing adjustment module, the crosstalk detection module, the timing generation module, the pixel value rearrangement mapping module, the dither module, the color correction module, etc. can be hardware, software, firmware, and any feasible combination thereof. For example, the timing adjustment module, the timing generation module, the crosstalk detection module, the pixel value rearrangement mapping module, the dither module, the color correction module can be a dedicated or general circuit, chip, or device, etc. The embodiments of the present disclosure do not limit the specific implementation form of each of the above modules or submodules. The detection and compensation device corresponds to each step of the detection and compensation method. For the specific functions of the detection and compensation method, please refer to the relevant description of the detection and compensation device, which will not be repeated here.

[0138] Regarding this disclosure, the following points need to be explained:

[0139] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to conventional designs.

[0140] (2) Unless there is any conflict, the features of the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0141] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display device, comprising: a plurality of sub-pixels, wherein the plurality of sub-pixels are arranged in an array; A crosstalk detector, wherein the crosstalk detector is configured to: Acquiring display data of an image displayed by the display device; For each column of at least one column of the plurality of sub-pixels, obtaining, according to the display data, a plurality of display difference information, wherein each piece of display difference information is obtained based on grayscale information between two adjacent rows of sub-pixels; determining whether crosstalk exists when the image is displayed by the display device based on the plurality of display difference information; and A timing controller configured to: in response to the display device displaying the image having the crosstalk, adjust the polarity information of the liquid crystal molecules of the plurality of sub-pixels; The timing controller further includes: a timing generation module configured to provide first polarity information to the crosstalk detector, wherein the first polarity information indicates polarities of liquid crystal molecules in the plurality of sub-pixels; The two adjacent rows of sub-pixels include a first row of sub-pixels and a second row of sub-pixels. When the first row of sub-pixels is charged, a first voltage is provided to the first row of sub-pixels. When the second row of sub-pixels is charged, a second voltage is provided to the second row of sub-pixels. The crosstalk detector is configured as follows: determining a voltage change direction according to the first polarity information, wherein the voltage change direction is determined based on the first voltage and the second voltage, and wherein the voltage change direction includes voltage pull-up and voltage pull-down; and Based on the plurality of display difference information and the voltage change direction corresponding to each of the plurality of display difference information, it is determined whether crosstalk exists when the display device displays the image.

2. The display device according to claim 1, wherein The timing controller includes a timing adjustment module, and the crosstalk detector is configured as follows: In response to the display device displaying that the image has the crosstalk, providing a first indication signal to the timing adjustment module, The timing adjustment module is configured as follows: Based on the first indication signal, polarity information of liquid crystal molecules of the plurality of sub-pixels is adjusted.

3. The display device according to claim 1, wherein The voltage pull-up includes one of the following situations: The two adjacent rows of sub-pixels are both negative polarity, and the grayscale value of the sub-pixels in the first row is greater than the grayscale value of the sub-pixels in the second row; The two adjacent rows of sub-pixels are both positive polarity, and the grayscale value of the sub-pixels in the first row is smaller than the grayscale value of the sub-pixels in the second row; or The first row of sub-pixels has a negative polarity, and the second row of sub-pixels has a positive polarity. The turn-on time of the sub-pixels in the first row is earlier than the turn-on time of the sub-pixels in the second row. The display device according to claim 1 , wherein: The voltage pull-down includes one of the following situations: The two adjacent rows of sub-pixels are both negative polarity, and the grayscale value of the sub-pixels in the first row is smaller than the grayscale value of the sub-pixels in the second row; The two adjacent rows of sub-pixels are both positive polarity, and the grayscale value of the sub-pixels in the first row is greater than the grayscale value of the sub-pixels in the second row; or The first row of sub-pixels has positive polarity, and the second row of sub-pixels has negative polarity. The turn-on time of the sub-pixels in the first row is earlier than the turn-on time of the sub-pixels in the second row.

5. The display device according to claim 1, wherein Each display difference information includes a first difference between the grayscale values ​​of the two adjacent rows of sub-pixels. The crosstalk detector is configured as follows: Acquire a first number of the first difference values ​​greater than a first threshold value in the voltage pull-up situation and a second number of the first difference values ​​greater than a second threshold value in the voltage pull-down situation; as well as Based on the first number and the second number, it is determined whether crosstalk occurs when the display device displays the image. The display device according to claim 5 , wherein: The crosstalk detector is configured as follows: calculating a second difference between the first amount and the second amount; In response to the second difference being greater than a preset threshold, accumulating and counting the second difference to obtain an accumulated count value; as well as In response to the accumulated count value being greater than a polarity reversal threshold, it is determined that crosstalk exists when the display device displays the image.

7. The display device according to claim 2, wherein The crosstalk detector is further configured to: In response to the display device displaying the image without the crosstalk, providing a second indication signal to the timing adjustment module, wherein the second indication signal is different from the first indication signal, The timing adjustment module is further configured to: In response to acquiring the second indication signal, the polarity information of the liquid crystal molecules of the plurality of sub-pixels is determined to be the first polarity information.

8. A display driving method for a display device, wherein the display device comprises a plurality of sub-pixels arranged in an array, wherein: The display driving method includes: Acquiring display data of an image displayed by the display device; For each column of at least one column of the plurality of sub-pixels, obtaining, according to the display data, a plurality of display difference information, wherein each piece of display difference information is obtained based on grayscale information between two adjacent rows of sub-pixels; determining whether crosstalk exists when the image is displayed by the display device based on the plurality of display difference information; and In response to the display device displaying the image having the crosstalk, adjusting the polarity information of the liquid crystal molecules of the plurality of sub-pixels to drive the display device according to the polarity of the liquid crystal molecules, The method further comprises: providing first polarity information to a crosstalk detector, wherein the first polarity information indicates polarities of liquid crystal molecules in the plurality of sub-pixels, The two adjacent rows of sub-pixels include a first row of sub-pixels and a second row of sub-pixels. When the first row of sub-pixels is charged, a first voltage is provided to the first row of sub-pixels. When the second row of sub-pixels is charged, a second voltage is provided to the second row of sub-pixels. Determining whether crosstalk occurs when displaying the image on the display device based on the plurality of display difference information includes: determining a voltage change direction according to the first polarity information, wherein the voltage change direction is determined based on the first voltage and the second voltage, and wherein the voltage change direction includes voltage pull-up and voltage pull-down; and Based on the plurality of display difference information and the voltage change direction corresponding to each of the plurality of display difference information, it is determined whether crosstalk exists when the display device displays the image.

9. A timing controller applied to a display device, wherein the display device comprises a plurality of sub-pixels arranged in an array. in, The timing controller is configured to adjust polarity information of liquid crystal molecules of the plurality of sub-pixels in response to crosstalk in the image displayed by the display device. The timing controller includes a crosstalk detection module, and the crosstalk detection module is configured as follows: Acquiring display data of an image displayed by the display device; For each column of at least one column of the plurality of sub-pixels, obtaining, according to the display data, a plurality of display difference information, wherein each piece of display difference information is obtained based on grayscale information between two adjacent rows of sub-pixels; determining whether crosstalk exists when the image is displayed by the display device based on the plurality of display difference information; The timing controller further includes: a timing generation module configured to provide first polarity information to the crosstalk detector, wherein the first polarity information indicates polarities of liquid crystal molecules in the plurality of sub-pixels; The two adjacent rows of sub-pixels include a first row of sub-pixels and a second row of sub-pixels. When the first row of sub-pixels is charged, a first voltage is provided to the first row of sub-pixels. When the second row of sub-pixels is charged, a second voltage is provided to the second row of sub-pixels. The crosstalk detector is configured as follows: determining a voltage change direction according to the first polarity information, wherein the voltage change direction is determined based on the first voltage and the second voltage, and wherein the voltage change direction includes voltage pull-up and voltage pull-down; and Based on the plurality of display difference information and the voltage change direction corresponding to each of the plurality of display difference information, it is determined whether crosstalk exists when the display device displays the image.

10. The timing controller according to claim 9, further comprising: Timing adjustment module, The crosstalk detection module is further configured to: in response to the display device displaying that the image has the crosstalk, provide a first indication signal to the timing adjustment module, The timing adjustment module is configured to adjust polarity information of liquid crystal molecules of the plurality of sub-pixels in response to obtaining a first indication signal.

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