Display device and driving method of display device

Abstract

This application discloses a display device and a driving method for the display device. In a normal state, a timing controller determines the driving polarity of each column of display data in at least one frame of display data according to a first polarity inversion driving ratio. When a first ratio adjustment condition is met, the timing controller adjusts the first polarity inversion driving ratio to a second polarity inversion driving ratio, and determines the driving polarity of each column of display data in at least one subsequent frame of display data according to the second polarity inversion driving ratio. The timing controller also determines the driving data corresponding to each column of display data based on each column of display data and its driving polarity, and sends at least one frame of driving data to the source driver chip, so that the source driver chip drives each column of sub-pixels in the display panel according to the driving data in each frame of driving data. This application achieves image retention prevention or improvement based on a driving method by adjusting the polarity inversion driving ratio to avoid or reduce the additional electric field formed by impurities.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically to a display device and a driving method for the display device. Background Technology

[0002] Image sticking refers to the phenomenon where, after a display panel has been driven to display a specific image A for an extended period, and then switched to display another image B, the image of the original image A remains. Figure 1 As shown, image retention may disappear after a period of time, but it may also remain regardless of time. Since image retention severely affects the display effect, how to effectively improve image retention is a technical problem that the industry is currently dedicated to researching. Summary of the Invention

[0003] This application provides a display device and a driving method for the display device, which adjusts the polarity reversal driving ratio to avoid or reduce the additional electric field formed by impurities, thereby preventing or improving image retention based on the driving method.

[0004] In a first aspect, embodiments of this application provide a display device, the display device comprising: a timing controller, a source driver chip connected to the timing controller, and a display panel connected to the source driver chip.

[0005] The timing controller is configured to: determine the driving polarity of each column of display data in at least one frame of display data according to a first polarity inversion driving ratio; adjust the first polarity inversion driving ratio to a second polarity inversion driving ratio when a first ratio adjustment condition is met; determine the driving polarity of each column of display data in at least one frame of display data according to the second polarity inversion driving ratio; determine the driving data corresponding to each column of display data based on each column of display data and the driving polarity of each column of display data; and send at least one frame of driving data to the source driver chip.

[0006] The source driver chip is used to drive each column of sub-pixels in the display panel according to each column of the driving data in each frame of the driving data.

[0007] Optionally, the relationship between the second polarity reversal drive ratio and the first polarity reversal drive ratio is related to the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

[0008] Optionally, both the first polarity reversal drive ratio and the second polarity reversal drive ratio are ratios between the number of drive columns of the first polarity and the number of drive columns of the second polarity, where the first polarity is one of positive and negative polarities, and the second polarity is the other of positive and negative polarities. When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio is the same as the direction of the drive electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio, the second polarity reversal drive ratio is less than the first polarity reversal drive ratio. When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio is the same as the direction of the drive electric field formed by the display panel when the display device is driven based on the second polarity, the second polarity reversal drive ratio is greater than the first polarity reversal drive ratio.

[0009] Optionally, the degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is related to the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

[0010] Optionally, the degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is positively correlated with the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

[0011] Optionally, the first ratio adjustment condition includes at least one of the following: a still image is detected based on the display data, the display duration of the still image is greater than a preset display duration, and the driving duration of the first polarity inversion driving ratio is greater than a first preset driving duration.

[0012] Optionally, the timing controller is further configured to: adjust the second polarity reversal drive ratio to the first polarity reversal drive ratio when the second proportional adjustment condition is met.

[0013] Optionally, the second ratio adjustment condition includes at least one of the following: dynamic images are detected based on the display data, and the driving duration of the second polarity reversal driving ratio is greater than the second preset driving duration.

[0014] Secondly, embodiments of this application provide a driving method for a display device. The display device includes: a timing controller, a source driver chip connected to the timing controller, and a display panel connected to the source driver chip. The driving method includes: the timing controller determining the driving polarity of each column of display data in at least one frame of display data according to a first polarity inversion driving ratio; when a first ratio adjustment condition is met, the timing controller adjusts the first polarity inversion driving ratio to a second polarity inversion driving ratio; the timing controller determining the driving polarity of each column of display data in at least one frame of display data according to the second polarity inversion driving ratio; the timing controller determining driving data corresponding to each column of display data based on each column of display data and the driving polarity of each column of display data; the timing controller sending at least one frame of driving data to the source driver chip; and the source driver chip driving each column of sub-pixels in the display panel according to each column of driving data in each frame of driving data.

[0015] Optionally, the driving method further includes: when the second proportional adjustment condition is met, the timing controller adjusts the second polarity reversal driving ratio to the first polarity reversal driving ratio.

[0016] In summary, the technical solution provided by this application embodiment allows the timing controller to determine the driving polarity of each column of display data in at least one frame of display data according to a first polarity inversion driving ratio under normal conditions. When the first ratio adjustment condition is met, the timing controller adjusts the first polarity inversion driving ratio to a second polarity inversion driving ratio, and determines the driving polarity of each column of display data in at least one subsequent frame of display data according to the second polarity inversion driving ratio. Furthermore, the timing controller also determines the driving data corresponding to each column of display data based on each column of display data and its driving polarity, and sends at least one frame of driving data to the source driver chip, so that the source driver chip drives each column of sub-pixels in the display panel according to the driving data in each frame of driving data. This application embodiment, by adjusting the first polarity inversion driving ratio to the second polarity inversion driving ratio after driving for a period of time according to the first polarity inversion driving ratio, promptly offsets the unbalanced electric field within the display panel, suppresses the accumulation of impurities within the display panel, avoids or reduces the additional electric field formed by impurities, and maintains the brightness balance of positive and negative polarities, thereby achieving a driving-based method to prevent or improve image retention. Furthermore, this application embodiment does not require knowledge of the cause of image retention, and can directly improve image retention from its root cause even when the cause is unknown, thus enhancing the effectiveness of image retention improvement. In addition, this application embodiment can improve image retention without modifying or tightening the photomask, manufacturing process, or other aspects of the display panel, resulting in lower cost and higher efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a residual image;

[0019] Figure 2 This is a schematic diagram of a display device provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of a first polarity reversal driving ratio provided in an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of a second polarity reversal driving ratio provided in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of another second polarity reversal drive ratio provided in an embodiment of this application;

[0023] Figure 6 This is a flowchart of a driving method for a display device provided in an embodiment of this application;

[0024] Figure 7 This is a flowchart of another driving method for a display device provided in an embodiment of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. The described technical solutions are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0026] Furthermore, in the embodiments of this application, "multiple" refers to two or more. The terms "first" and "second," etc., in the embodiments of this application are used to distinguish different technical features and do not indicate any order, quantity, or importance.

[0027] The various embodiments provided in this application are similar, and features in different embodiments can be combined with each other.

[0028] The order in which the following embodiments are described is not intended to limit the preferred order of the embodiments.

[0029] Display devices typically use VCOM (Common Voltage Composition) as a reference, driving the output voltage of the source driver IC (Driver IC) to either High or Low. Different frame values ​​generate their own positive or negative driving electric fields to maintain the liquid crystal angle, thereby achieving brightness adjustment. However, after a period of driving, an excess electric field gradually forms inside the display panel. This is because ionized impurities inside the display panel accumulate in one area during long-term driving, forming an additional electric field. Even if the voltage setting is correct, the presence of this additional electric field cannot be avoided. This additional electric field causes the originally set driving electric field to become unbalanced, and depending on the degree of imbalance error in the driving electric field, varying degrees of image retention will occur.

[0030] Therefore, the principle of image retention can be summarized as follows: In the initial stage of driving, the display panel is set in a balanced manner according to the brightness of the positive or negative electric field, which is consistent with the initial characteristics of the display panel. Over time, the display panel forms an additional electric field. This is because impurities inside the display panel accumulate in one area during long-term driving, and these impurities are polarized. If they accumulate in one area, they will form an electric field. The additional electric field will change the initial characteristics of the display panel. An error will appear between the voltage difference between the output voltage of the source driver chip and VCOM and the characteristics of the display panel. This error will break the brightness balance of the positive and negative polarities, thus causing image retention.

[0031] In view of this, embodiments of this application provide a display device and a driving method for the display device, which can eliminate or reduce the additional electric field based on the driving method, thereby preventing or improving image retention. Embodiments of this application do not require knowledge of the cause of image retention and can directly improve image retention at its root cause even when image retention is caused by any unknown reason. Furthermore, embodiments of this application do not require changes or tightening of the display panel's mask, manufacturing process, etc., to improve image retention, resulting in lower cost and higher efficiency.

[0032] Please see Figure 2 , Figure 2This is a schematic diagram of a display device provided in an embodiment of this application. The display device can be an LCD (Liquid Crystal Display). It should be understood that this does not constitute a limitation on the embodiments of this application. In practical applications, the display device can also be implemented as any of the following: LED (Light Emitting Diode) display, Mini LED (Miniature Light Emitting Diode) display, Micro LED (Micro Light Emitting Diode) display, AMOLED (Active Matrix Organic Light Emitting Diode) display, OLED (Organic Light Emitting Diode Display), etc.

[0033] like Figure 2 As shown, the display device may include: a timing controller 100, a source driver chip 200 connected to the timing controller 100, and a display panel 300 connected to the source driver chip 200.

[0034] The timing controller 100 can send driving data to the source driver chip 200, which can then drive the display panel 300 to display an image. For example, the display panel 300 includes an array of sub-pixels, i.e., at least one row and at least one column of sub-pixels. The source driver chip 200 can drive each sub-pixel in the display panel 300 according to the driving data to adjust the brightness and / or color of the sub-pixels, thereby achieving image display.

[0035] In some embodiments, such as Figure 2 As shown, the display device may further include a processor 400, which may be a GPU (Graphics Processing Unit), an AP (Application Processor), an MCU (Microcontroller Unit), etc. A timing controller 100 may be connected to the processor 400, allowing the processor 400 to send display data to the timing controller 100 for processing. This display data may be static image display data or dynamic video display data; this embodiment does not limit the specific type of data.

[0036] In normal operation, the timing controller 100 is used to: determine the driving polarity of each column of display data in at least one frame of display data according to the first polarity inversion driving ratio; determine the driving data corresponding to each column of display data based on each column of display data and its driving polarity; and send at least one frame of driving data to the source driver chip 200. The source driver chip 200 is used to: drive each column of sub-pixels in the display panel 300 according to the driving data in each frame of driving data.

[0037] In the column inversion driving process of the display panel, a first polarity drive and a second polarity drive are performed sequentially in each driving cycle. The ratio between the number of columns driven by the first polarity and the number of columns driven by the second polarity in a complete driving cycle is the polarity inversion drive ratio. The first polarity can be either positive or negative, and the second polarity can be either positive or negative. For example, the first polarity can be positive and the second polarity negative, or vice versa. In this embodiment, the first polarity inversion drive ratio and the second polarity inversion drive ratio are polarity inversion drive ratios with different values.

[0038] The embodiments of this application do not limit the specific value of the first polarity reversal driving ratio. In practical applications, it can be flexibly set according to the characteristics of the display panel, etc. For example, the first polarity reversal driving ratio can be set to 1:1, 1:1.2, 1.5:1, 2:1 or 1:2, etc.

[0039] Please see Figure 3 , Figure 3 This is a schematic diagram of a first polarity reversal driving ratio provided in an embodiment of this application. Figure 3 In the display panel shown, red sub-pixels, green sub-pixels, and blue sub-pixels can be arranged in columns in sequence, such as the S1 column being a red sub-pixel, the S2 column being a green sub-pixel, the S3 column being a blue sub-pixel, the S4 column being a red sub-pixel, and so on. Figure 3 Taking a first polarity reversal drive ratio of 1:1 as an example, such as Figure 3 As shown, the S1st column sub-pixel in the display panel 300 can be driven based on positive polarity, the next column of sub-pixels adjacent to the S1st column sub-pixel (the S2nd column sub-pixel) can be driven based on negative polarity, the next column of sub-pixels adjacent to the S2nd column sub-pixel (the S3rd column sub-pixel) can be driven based on positive polarity, and so on.

[0040] Each frame of display data may include display data corresponding to each sub-pixel in the array arrangement, such as grayscale. The timing controller 100, according to the first polarity inversion drive ratio, can determine the drive polarity of each column of display data in at least one frame of display data. Then, for each column of display data, it processes the display data according to its drive polarity, such as performing voltage or current mapping processing, to obtain the corresponding drive data. In this embodiment, the drive polarity needs to be considered when mapping display data to drive data because the physical response characteristics of the display panel differ under different drive polarities, and the nonlinear characteristics of the display panel also vary under different drive polarities.

[0041] When the first ratio adjustment condition is met, the timing controller 100 is further configured to: adjust the first polarity inversion drive ratio to the second polarity inversion drive ratio; determine the drive polarity of each column of display data in at least one frame of display data according to the second polarity inversion drive ratio; determine the drive data corresponding to each column of display data according to each column of display data and the drive polarity of each column of display data; and send at least one frame of drive data to the source driver chip 200. Furthermore, the source driver chip 200 is further configured to: drive each column of sub-pixels in the display panel 300 according to the drive data in each frame of drive data.

[0042] This application does not limit the specific content of the first ratio adjustment condition in its embodiments, and it can be flexibly set according to actual needs in practical applications. In some embodiments, the first ratio adjustment condition includes, but is not limited to, at least one of the following: detecting a still image based on display data, the display duration of the still image being greater than a preset display duration, and the driving duration of the first polarity inversion driving ratio being greater than a first preset driving duration. The preset display duration and the first preset driving duration can both be flexibly set according to needs, and this application does not limit them.

[0043] The timing controller 100 can detect whether the displayed image is static based on the display data. For example, if the grayscale of each sub-pixel in the display data does not change or the change is within a preset range, a static image is detected. The timing controller 100 can also detect the display duration of the static image (i.e., the static duration) to determine whether the display duration is greater than a preset display duration. In addition, the timing controller 100 can also detect the driving duration of the first polarity inversion drive ratio to determine whether the driving duration is greater than a first preset driving duration. If a static image is detected, the display duration of the static image is greater than the preset display duration, and / or the driving duration of the first polarity inversion drive ratio is greater than the first preset driving duration, it can be determined that the first ratio adjustment condition is met. The timing controller 100 adjusts the first polarity inversion drive ratio to a second polarity inversion drive ratio and continues to process subsequent display data according to the second polarity inversion drive ratio.

[0044] The second polarity reversal drive ratio is a polarity reversal drive ratio with different values ​​than the first polarity reversal drive ratio. In this embodiment, after driving according to the first polarity reversal drive ratio for a period of time, the first polarity reversal drive ratio is adjusted to the second polarity reversal drive ratio. This promptly counteracts the unbalanced electric field within the display panel, suppresses the accumulation of impurities within the display panel, avoids or reduces the formation of additional electric fields by impurities, maintains the brightness balance of positive and negative polarities, and thus prevents or improves image retention.

[0045] As can be seen from the above embodiments, the additional electric field refers to an electric field formed inside the display panel, in addition to the normal driving electric field, due to the accumulation of impurities, etc. The additional electric field interferes with normal pixel driving, leading to display abnormalities. In some embodiments, to effectively avoid or mitigate the additional electric field and improve the image retention effect, the value relationship between the second polarity inversion driving ratio and the first polarity inversion driving ratio is related to the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity inversion driving ratio. By determining the adjustment direction of the polarity inversion driving ratio based on the direction of the additional electric field, the adjustment of the polarity inversion driving ratio is matched with the current characteristics of the display panel, ensuring that the adjusted second polarity inversion driving ratio can effectively and accurately avoid or mitigate the additional electric field, thereby improving the image retention effect.

[0046] Here, both the first polarity reversal drive ratio and the second polarity reversal drive ratio are ratios between the number of drive columns for the first polarity and the number of drive columns for the second polarity. The first polarity is either positive or negative, and the second polarity is either positive or negative. For example, the first polarity is positive and the second polarity is negative, or the first polarity is negative and the second polarity is positive.

[0047] When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio is the same as the direction of the driving electric field formed by the display panel when the display device is driven based on the first polarity, the second polarity reversal drive ratio is smaller than the first polarity reversal drive ratio. That is, the polarity reversal drive ratio is the ratio between the number of driving columns of the first polarity and the number of driving columns of the second polarity. When the direction of the additional electric field is the same as the direction of the driving electric field corresponding to the first polarity, or in other words, when the direction of the additional electric field is opposite to the direction of the driving electric field corresponding to the second polarity, the additional electric field is reduced or eliminated by adjusting the first polarity reversal drive ratio to a smaller second polarity reversal drive ratio, thereby reducing the number of driving columns of the first polarity and / or increasing the number of driving columns of the second polarity, thus mitigating or eliminating the driving electric field corresponding to the first polarity and / or strengthening the driving electric field corresponding to the second polarity.

[0048] When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio is the same as the direction of the driving electric field formed by the display panel when the display device is driven based on the second polarity, the second polarity reversal drive ratio is greater than the first polarity reversal drive ratio. That is, the polarity reversal drive ratio is the ratio between the number of driving columns of the first polarity and the number of driving columns of the second polarity. When the direction of the additional electric field is the same as the direction of the driving electric field corresponding to the second polarity, or in other words, when the direction of the additional electric field is opposite to the direction of the driving electric field corresponding to the first polarity, by adjusting the first polarity reversal drive ratio to a second polarity reversal drive ratio with a larger value, the polarity reversal drive ratio is increased, the number of driving columns of the second polarity is decreased and / or the number of driving columns of the first polarity is increased, the driving electric field corresponding to the second polarity is reduced and / or the driving electric field corresponding to the first polarity is strengthened, thereby reducing or eliminating the additional electric field.

[0049] In some embodiments, to further improve the image retention reduction effect and more accurately reduce or eliminate the additional electric field, the degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is related to the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio. By determining the adjustment degree of the polarity reversal drive ratio based on the strength of the additional electric field, the adjustment of the polarity reversal drive ratio is matched with the current characteristics of the display panel, avoiding adjustment that is too light or too heavy, ensuring that the additional electric field can be accurately reduced or eliminated, thereby precisely improving the image retention reduction effect.

[0050] The degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio can be positively correlated with the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio. The greater the strength of the additional electric field, the greater the adjustment degree of the polarity reversal drive ratio, and the greater the absolute value of the difference between the second and first polarity reversal drive ratios. Conversely, the smaller the strength of the additional electric field, the smaller the adjustment degree of the polarity reversal drive ratio, and the smaller the absolute value of the difference between the second and first polarity reversal drive ratios.

[0051] The embodiments of this application do not limit the specific value of the second polarity reversal driving ratio. In practical applications, it can be flexibly set according to the characteristics of the display panel, the direction and intensity of the added electric field, etc. For example, the second polarity reversal driving ratio can be set to 2:1, 3:2, 2:3 or 1:1.5, etc.

[0052] Please see Figure 4 and Figure 5 , Figure 4This is a schematic diagram of a second polarity reversal drive ratio provided in an embodiment of this application. Figure 5 This is a schematic diagram of another second polarity reversal driving ratio provided in an embodiment of this application. Figure 4 and Figure 5 In the display panel shown, red sub-pixels, green sub-pixels, and blue sub-pixels can be arranged in columns in sequence, such as the S1 column being a red sub-pixel, the S2 column being a green sub-pixel, the S3 column being a blue sub-pixel, the S4 column being a red sub-pixel, and so on. Figure 4 Taking a second polarity reversal drive ratio of 3:2 as an example, such as Figure 4 As shown, in the display panel 300, the sub-pixels in columns S1 to S3 can be driven based on positive polarity, the next group of sub-pixels adjacent to the sub-pixels in columns S1 to S3 (sub-pixels in columns S4 to S5) can be driven based on negative polarity, the next group of sub-pixels adjacent to the sub-pixels in columns S4 to S5 (sub-pixels in columns S6 to S8) can be driven based on positive polarity, and so on. Figure 5 Taking a second polarity reversal drive ratio of 2:1 as an example, such as Figure 5 As shown, in the display panel 300, the sub-pixels in column S1 to column S2 can be driven based on positive polarity, the next group of sub-pixels adjacent to the sub-pixels in column S1 to column S2 (the sub-pixels in column S3) can be driven based on negative polarity, the next group of sub-pixels adjacent to the sub-pixels in column S3 (the sub-pixels in columns S4 to S5) can be driven based on positive polarity, and so on.

[0053] It should be understood that in the embodiments of this application, the first polarity reversal drive ratio and the second polarity reversal drive ratio can both be obtained based on actual testing or debugging, and preset in the display device; during the driving process, the timing controller can read and use the corresponding polarity reversal drive ratio according to the requirements or the characteristics of the added electric field.

[0054] Each frame of display data may include display data corresponding to each sub-pixel in the array arrangement, such as grayscale. After adjusting the first polarity inversion drive ratio to the second polarity inversion drive ratio, the timing controller 100 can determine the drive polarity of each column of display data in at least one subsequent frame of display data according to the second polarity inversion drive ratio. Then, for each column of display data, the controller processes the column of display data according to its drive polarity, such as performing voltage, current, or other mapping processing, to obtain the drive data corresponding to that column of display data.

[0055] In some embodiments, the timing controller 100 is further configured to: adjust the second polarity inversion drive ratio to the first polarity inversion drive ratio when the second ratio adjustment condition is met. By restoring the second polarity inversion drive ratio to the first polarity inversion drive ratio after driving according to the second polarity inversion drive ratio for a period of time, the formation of an additional electric field or incompatibility with the characteristics of the display panel due to long-term driving based on the second polarity inversion drive ratio is avoided, thereby effectively ensuring the display effect of the display device.

[0056] This application does not limit the specific content of the second ratio adjustment condition in its embodiments, and it can be flexibly set according to actual needs in practical applications. In some embodiments, the second ratio adjustment condition includes, but is not limited to, at least one of the following: dynamic images are detected based on display data, and the driving duration of the second polarity inversion driving ratio is greater than the second preset driving duration. The second preset driving duration can be flexibly set according to needs, and this application does not limit it. Furthermore, the second preset driving duration and the first preset driving duration can be the same or different.

[0057] The timing controller 100 can detect whether the displayed image has changed based on the display data. For example, if the grayscale of each sub-pixel in the display data changes or the amount of change exceeds a preset range, a dynamic image is detected. The timing controller 100 can also detect the driving duration of the second polarity inversion driving ratio to determine whether the driving duration is greater than a second preset driving duration. If a dynamic image is detected, and / or the driving duration of the second polarity inversion driving ratio is greater than the second preset driving duration, it can be determined that the second ratio adjustment condition is met. The timing controller 100 restores the second polarity inversion driving ratio to the first polarity inversion driving ratio and continues to process subsequent display data according to the first polarity inversion driving ratio.

[0058] In summary, the technical solution provided by this application embodiment allows the timing controller to determine the driving polarity of each column of display data in at least one frame of display data according to a first polarity inversion driving ratio under normal conditions. When the first ratio adjustment condition is met, the timing controller adjusts the first polarity inversion driving ratio to a second polarity inversion driving ratio, and determines the driving polarity of each column of display data in at least one subsequent frame of display data according to the second polarity inversion driving ratio. Furthermore, the timing controller also determines the driving data corresponding to each column of display data based on each column of display data and its driving polarity, and sends at least one frame of driving data to the source driver chip, so that the source driver chip drives each column of sub-pixels in the display panel according to the driving data in each frame of driving data. This application embodiment, by adjusting the first polarity inversion driving ratio to the second polarity inversion driving ratio after driving for a period of time according to the first polarity inversion driving ratio, promptly offsets the unbalanced electric field within the display panel, suppresses the accumulation of impurities within the display panel, avoids or reduces the additional electric field formed by impurities, and maintains the brightness balance of positive and negative polarities, thereby achieving a driving-based method to prevent or improve image retention. Furthermore, this application embodiment does not require knowledge of the cause of image retention, and can directly improve image retention from its root cause even when the cause is unknown, thus enhancing the effectiveness of image retention improvement. In addition, this application embodiment can improve image retention without modifying or tightening the photomask, manufacturing process, or other aspects of the display panel, resulting in lower cost and higher efficiency.

[0059] Please see Figure 6 , Figure 6 This is a flowchart illustrating a driving method for a display device according to an embodiment of this application. This driving method can be used to drive the aforementioned display device, such as... Figure 2 The display device shown may include: a timing controller, a source driver chip connected to the timing controller, and a display panel connected to the source driver chip. Figure 6 As shown, the driving method may include the following steps S610 to S660.

[0060] Step S610: The timing controller determines the driving polarity of each column of display data in at least one frame of display data according to the first polarity inversion drive ratio;

[0061] Step S620: When the first proportional adjustment condition is met, the timing controller adjusts the first polarity reversal drive ratio to the second polarity reversal drive ratio.

[0062] Step S630: The timing controller determines the driving polarity of each column of display data in at least one frame of display data according to the second polarity inversion drive ratio;

[0063] Step S640: The timing controller determines the driving data corresponding to each column of display data based on the display data of each column and the driving polarity of each column of display data;

[0064] Step S650: The timing controller sends at least one frame of drive data to the source driver chip;

[0065] Step S660: The source driver chip drives each column of sub-pixels in the display panel according to the driving data in each frame of driving data.

[0066] In some embodiments, the magnitude relationship between the second polarity reversal drive ratio and the first polarity reversal drive ratio is related to the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

[0067] In some embodiments, both the first polarity reversal drive ratio and the second polarity reversal drive ratio are ratios between the number of drive columns of the first polarity and the number of drive columns of the second polarity, where the first polarity is either positive or negative, and the second polarity is either positive or negative. When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio is the same as the direction of the drive electric field formed by the display panel when the display device is driven based on the first polarity, the second polarity reversal drive ratio is less than the first polarity reversal drive ratio. When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio is the same as the direction of the drive electric field formed by the display panel when the display device is driven based on the second polarity, the second polarity reversal drive ratio is greater than the first polarity reversal drive ratio.

[0068] In some embodiments, the degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is related to the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

[0069] In some embodiments, the degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is positively correlated with the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

[0070] In some embodiments, the first scaling condition includes at least one of the following: a still image is detected based on display data, the display duration of the still image is greater than a preset display duration, and the driving duration of the first polarity reversal driving ratio is greater than a first preset driving duration.

[0071] In some embodiments, the driving method of the display device further includes: when the second ratio adjustment condition is met, the timing controller adjusts the second polarity reversal driving ratio to the first polarity reversal driving ratio.

[0072] In some embodiments, the second scaling condition includes at least one of the following: dynamic images are detected based on display data, and the driving duration of the second polarity reversal driving ratio is greater than the second preset driving duration.

[0073] For further description of the steps and their beneficial effects in the driving method of the above-described display device, please refer to the above embodiments; they will not be repeated here.

[0074] The technical solution provided in the embodiments of this application will be described below with an example.

[0075] Please see Figure 7 , Figure 7 This is a flowchart of another driving method for a display device provided in an embodiment of this application. This driving method can be used to drive the aforementioned display device, such as... Figure 2 The display device shown may include: a timing controller, a source driver chip connected to the timing controller, and a display panel connected to the source driver chip. Figure 7 As shown, the driving method may include the following steps S701 to S709.

[0076] Step S701: The timing controller determines the driving polarity of each column of display data in at least one frame of display data according to the first polarity inversion drive ratio. In the initial driving phase of the display panel, the first polarity inversion drive ratio can be set according to requirements such as brightness standards and electric field balance, for example, as described above. Figure 3 The first polarity reversal drive ratio shown is matched to the characteristics of the display panel during initial driving.

[0077] Step S702: The timing controller determines whether the first ratio adjustment condition is met; if it is met, proceed to step S703 below; otherwise, proceed to step S707 below. The first ratio adjustment condition includes, but is not limited to, at least one of the following: a still image is detected based on the display data, the display duration of the still image is greater than the preset display duration, and the driving duration of the first polarity inversion drive ratio is greater than the first preset driving duration.

[0078] Step S703: The timing controller adjusts the first polarity reversal drive ratio to the second polarity reversal drive ratio. When the first ratio adjustment condition is met, if a static image is displayed for a long time, an additional electric field may be formed. At this time, the polarity reversal drive ratio is adjusted, such as by adjusting it to... Figure 4 or Figure 5 The second polarity reversal drive ratio is shown.

[0079] Step S704: The timing controller determines the driving polarity of each column of display data in at least one frame of display data according to the second polarity inversion drive ratio. After adjusting the polarity inversion drive ratio, the unbalanced electric field in the original display panel can be canceled, the accumulation of impurities in the display panel can be suppressed, so that impurities cannot form an electric field, thereby preventing or reducing the effect of adding an electric field, ensuring that the display panel maintains the characteristics of the initial driving stage, so that the voltage difference between the output voltage of the source driver chip and VCOM is matched with the characteristics of the display panel, maintaining the brightness balance of positive and negative polarities, and avoiding or improving image retention.

[0080] Step S705: The timing controller determines whether the second proportional adjustment condition is met; if it is met, proceed to step S706 below; otherwise, proceed to step S704 above.

[0081] Step S706: The timing controller adjusts the second polarity inversion drive ratio to the first polarity inversion drive ratio.

[0082] Step S707: The timing controller determines the driving data corresponding to each column of display data based on the display data of each column and the driving polarity of each column of display data.

[0083] Step S708: The timing controller sends at least one frame of drive data to the source driver chip.

[0084] Step S709: The source driver chip drives each column of sub-pixels in the display panel according to the driving data in each frame of driving data.

[0085] For further description of the steps and their beneficial effects in the driving method of the above-described display device, please refer to the above embodiments; they will not be repeated here.

[0086] The above provides a detailed description of a display device and a driving method for the display device according to embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display device, characterized in that, The display device includes: a timing controller, a source driver chip connected to the timing controller, and a display panel connected to the source driver chip; wherein, The timing controller is configured to: determine the driving polarity of each column of display data in at least one frame of display data according to a first polarity inversion driving ratio; adjust the first polarity inversion driving ratio to a second polarity inversion driving ratio when a first ratio adjustment condition is met; determine the driving polarity of each column of display data in at least one frame of display data according to the second polarity inversion driving ratio; determine the driving data corresponding to each column of display data based on each column of display data and the driving polarity of each column of display data; and send at least one frame of driving data to the source driver chip. The source drive chip is used to drive each column of sub-pixels in the display panel according to each column of drive data in each frame of drive data; The relationship between the second polarity reversal driving ratio and the first polarity reversal driving ratio is related to the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal driving ratio.

2. The display device according to claim 1, characterized in that, Both the first polarity reversal drive ratio and the second polarity reversal drive ratio are ratios between the number of drive columns of the first polarity and the number of drive columns of the second polarity. The first polarity is one of positive polarity and negative polarity, and the second polarity is the other of positive polarity and negative polarity. When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal driving ratio is the same as the direction of the driving electric field formed by the display panel when the display device is driven based on the first polarity, the second polarity reversal driving ratio is smaller than the first polarity reversal driving ratio. When the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal driving ratio is the same as the direction of the driving electric field formed by the display panel when the display device is driven based on the second polarity, the second polarity reversal driving ratio is greater than the first polarity reversal driving ratio.

3. The display device according to claim 1, characterized in that, The degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is related to the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

4. The display device according to claim 3, characterized in that, The degree of difference between the second polarity reversal drive ratio and the first polarity reversal drive ratio is positively correlated with the strength of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal drive ratio.

5. The display device according to claim 1, characterized in that, The first ratio adjustment condition includes at least one of the following: a still image is detected based on the display data, the display duration of the still image is greater than a preset display duration, and the driving duration of the first polarity reversal driving ratio is greater than a first preset driving duration.

6. The display device according to claim 1, characterized in that, The timing controller is further configured to: adjust the second polarity reversal drive ratio to the first polarity reversal drive ratio when the second proportional adjustment condition is met.

7. The display device according to claim 6, characterized in that, The second ratio adjustment condition includes at least one of the following: dynamic images are detected based on the display data, and the driving duration of the second polarity reversal driving ratio is greater than the second preset driving duration.

8. A driving method for a display device, characterized in that, The display device includes: a timing controller, a source driver chip connected to the timing controller, and a display panel connected to the source driver chip; wherein, the driving method includes: The timing controller determines the driving polarity of each column of display data in at least one frame of display data according to the first polarity inversion driving ratio; When the first proportional adjustment condition is met, the timing controller adjusts the first polarity reversal drive ratio to the second polarity reversal drive ratio. The timing controller determines the driving polarity of each column of display data in at least one frame of display data according to the second polarity inversion driving ratio; The timing controller determines the driving data corresponding to each column of display data based on each column of display data and the driving polarity of each column of display data; The timing controller sends at least one frame of the driving data to the source driver chip; The source driver chip drives each column of sub-pixels in the display panel according to each column of the driving data in each frame of the driving data; The relationship between the second polarity reversal driving ratio and the first polarity reversal driving ratio is related to the direction of the additional electric field formed by the display panel when the display device is driven based on the first polarity reversal driving ratio.

9. The driving method for the display device according to claim 8, characterized in that, The driving method further includes: When the second proportional adjustment condition is met, the timing controller adjusts the second polarity reversal drive ratio to the first polarity reversal drive ratio.

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