Method for eliminating residual image of display panel, device for eliminating residual image and display device

Abstract

The application discloses a residual image elimination method, a residual image elimination device and a display device of a display panel, and the residual image elimination method comprises the following steps: performing partition detection on a display area of the display panel, and determining whether a static display subarea exists in the display area; if the static display subarea exists, performing position transformation on display data of a subpixel in the static display subarea, and the position transformation area is located on one side or opposite two sides of the subpixel. The technical scheme provided by the embodiment of the application improves the display effect of the display panel, and reduces the complexity of position transformation of the display data of the subpixel in the static display subarea.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a method, apparatus and device for eliminating image retention on a display panel. Background Technology

[0002] With the development of display technology, people have increasingly higher requirements for the display performance of display panels.

[0003] Currently, the display panel's display effect is poor and cannot meet the requirements for high-quality display. Summary of the Invention

[0004] This invention provides a method, apparatus, and display device for eliminating image retention on a display panel, thereby improving the display effect of the display panel.

[0005] According to one aspect of the present invention, a method for eliminating image retention on a display panel is provided, comprising:

[0006] The display area of ​​the display panel is partitioned for detection to determine whether there is a static display sub-area in the display area;

[0007] If present, the display data of the sub-pixels in the static display sub-area will be repositioned around the sub-pixels, with the repositioning area located on one side or opposite sides of the sub-pixels.

[0008] Optionally, when the region of position transformation is located on opposite sides of the sub-pixel, the distance from the transformed positions on opposite sides to the sub-pixel is equal.

[0009] Optionally, the step of repositioning the display data of the sub-pixels in the static display sub-area around the sub-pixels includes:

[0010] In N consecutive frames, the display data of all sub-pixels in the static display sub-area is provided to the surrounding sub-pixels for display; where N is an integer greater than or equal to 1.

[0011] Optionally, the step of repositioning the display data of the sub-pixels in the static display sub-area around the sub-pixels includes:

[0012] The display data of each sub-pixel in the static display sub-area are synchronously transformed in the same direction and at the same distance, so that the display image of the static display sub-area is shifted as a whole in the display area of ​​the display panel.

[0013] Optionally, when the region of position change is located on either side of the sub-pixel, the step of providing the display data of each sub-pixel in the static display sub-area to the surrounding sub-pixels for display in N consecutive frames includes:

[0014] In a series of S frames, the display data of each sub-pixel in the static display sub-area is provided to the substitute display sub-pixel located on the first side of each sub-pixel for display;

[0015] In a continuous T-frame, the display data of each sub-pixel in the static display sub-area is provided to the substitute display sub-pixel located on the second side opposite to the first side for display;

[0016] Where T = S + T; N is an integer greater than or equal to 2, S is an integer greater than or equal to 1, and T is an integer greater than or equal to 1.

[0017] Optionally, the step of performing partition detection on the display panel to determine whether there is a static display sub-area in the display area includes:

[0018] The display area of ​​the display panel is divided into multiple display sub-areas;

[0019] Determine whether there is a display sub-region among multiple display sub-regions whose display image remains unchanged within M consecutive frames; where M is an integer greater than 1;

[0020] If it exists, then the display sub-area will be designated as a static display sub-area.

[0021] Optionally, the step of performing partition detection on the display panel to determine whether there is a static display sub-area in the display area further includes:

[0022] Determine whether any of the multiple display sub-regions has a portion of its display area that remains unchanged within M consecutive frames; if so,

[0023] Then determine whether the ratio of the non-static screen area in the display sub-area to the area of ​​the display sub-area is less than a preset ratio. If so, determine that the display sub-area is a static display sub-area.

[0024] Alternatively, determine whether the difference between the area of ​​the static screen area and the area of ​​the non-static screen area in the display sub-area is greater than a preset difference. If so, then determine that the display sub-area is a static display sub-area.

[0025] Optionally, the method for eliminating image retention on the display panel further includes:

[0026] Obtain the actual usage time of each sub-pixel in the display panel;

[0027] The total equivalent aging time of each sub-pixel is determined based on the actual usage time of each sub-pixel.

[0028] Obtain the aging curve, and determine the brightness decay of each sub-pixel based on the aging curve and the total equivalent aging time; the aging curve is the relationship curve between the equivalent aging time and the brightness decay.

[0029] The display data of each sub-pixel is compensated based on the brightness attenuation of each sub-pixel and the target attenuation.

[0030] According to another aspect of the present invention, a display panel ghosting elimination device is provided, comprising:

[0031] The detection module is used to perform partition detection on the display area of ​​the display panel to determine whether there is a static display sub-area in the display area;

[0032] The data transposition module is used to reposition the display data of the sub-pixels in the static display sub-area around the sub-pixels; wherein the repositioning area is located on one side or opposite sides of the sub-pixels.

[0033] According to another aspect of the present invention, a display device is provided, including a display panel and a ghosting elimination device for the display panel as described in any embodiment of the present invention.

[0034] This invention provides a method, apparatus, and display device for eliminating image retention in a display panel. The method for eliminating image retention in a display panel includes: performing partition detection on the display area of ​​the display panel to determine whether a static display sub-area exists in the display area; if so, performing position transformation on the display data of the sub-pixels in the static display sub-area around the sub-pixels, wherein the position transformation area is located on one side or opposite sides of the sub-pixels. The technical solution provided by this invention detects the display area of ​​the display panel by partitioning it to determine whether there is a static display portion in the display image, i.e., whether there is a static display sub-area in the display area. If so, the display data of the sub-pixels in the static display sub-area is repositioned around the sub-pixels, so that the display position of the static image in the static display sub-area moves. This avoids the sub-pixels from remaining unchanged in their position for a long time, which can improve the ghosting problem of static images in their original positions and improve the display effect of the display panel. In addition, setting the position transformation area to be located on one side or opposite sides of the sub-pixel can keep the static image in the static display sub-area moving on one side or opposite sides of the static display sub-area, reducing the complexity of the position transformation of the display data of the sub-pixels in the static display sub-area.

[0035] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the display screen of a display panel in the previous frame, provided in related technologies;

[0038] Figure 2 This is a schematic diagram of the target display screen of a display panel in the current frame, provided in related technologies;

[0039] Figure 3 This is a schematic diagram of the actual display screen of a display panel in the current frame, provided in related technologies;

[0040] Figure 4 This is a flowchart of a method for eliminating image retention on a display panel according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram illustrating a display area division method for a display panel provided in an embodiment of the present invention;

[0042] Figure 6 This is a flowchart of another method for eliminating image retention in a display panel provided in an embodiment of the present invention;

[0043] Figure 7 This is a flowchart of another method for eliminating image retention in a display panel provided in an embodiment of the present invention;

[0044] Figure 8 This is a structural block diagram of a display panel image retention elimination device provided in an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] As mentioned in the background technology, the requirements for display performance of display panels are becoming increasingly stringent. When an AMOLED (Active-matrix organic light-emitting diode) display panel displays the same image for an extended period before switching scenes, a residual image from the previous frame will remain. This residual image takes a considerable amount of time to gradually fade until it disappears completely; this phenomenon is called image retention. For example, Figure 1 This is a schematic diagram of the display panel shown in the previous frame, provided in related technologies. Figure 2 This is a schematic diagram of a display panel displaying its target image in the current frame, as provided in related technologies. Figure 3 This is a schematic diagram of the actual display screen of a display panel in the current frame, provided in related technologies. (Reference) Figures 1-3 The display panel displays a hexagonal image 01 at the four corners of the display area for an extended period of time. The target display image of the display panel in the current frame is to display a hexagonal image 02 at the center of the display area. However, because the hexagonal image 01 is displayed at the corners of the display area for an extended period of time, the sub-pixels of this part of the display panel will suffer more severe wear and tear than other sub-pixels, and the luminous efficiency will decay faster. As a result, the actual display image of the display panel in the current frame will show a ghost image of the hexagonal image 01 from the previous frame.

[0049] In related technologies, during the normal display process of the display panel, the driver chip records the usage time and total equivalent aging time of each sub-pixel in the display panel in real time. Then, the driver chip compensates the display grayscale of the sub-pixels according to the aging curve obtained from the previous experiment of the display panel and the set target decay curve, so as to improve the image retention problem. However, due to the poor accuracy and consistency of the data obtained from the previous experiment, the aging compensation accuracy of the sub-pixels in the display panel is inaccurate, which affects the image retention improvement effect.

[0050] Based on this, embodiments of the present invention provide a method for eliminating image retention in a display panel. Figure 4 This is a flowchart of a method for eliminating image retention on a display panel according to an embodiment of the present invention, see reference. Figure 4 Methods for eliminating image retention on display panels include:

[0051] S110. Perform partition detection on the display area of ​​the display panel to determine whether there is a static display sub-area in the display area.

[0052] Specifically, during the detection of the display panel's screen, the display screen is divided into multiple sub-regions. Each sub-region is detected to determine if a static display sub-region exists. A static display sub-region can be understood as a sub-region where the displayed image remains unchanged for M consecutive frames, where M is an integer greater than 1, and the value of M can be set according to actual conditions. A static display sub-region can also be understood as a sub-region where the displayed content remains unchanged for a first preset time period, which can be set according to actual conditions, such as 10 minutes, 15 minutes, 20 minutes, 30 minutes, etc. The time conditions or frame count conditions for different display sub-regions to be identified as static display sub-regions can be the same or different.

[0053] By performing zoned detection on the display area of ​​the display panel, it is possible to more accurately identify local areas prone to ghosting (such as areas displaying static icons for extended periods), avoiding the risk of missed detections caused by global monitoring. Different locations within the display area can also be treated differently: higher monitoring frequencies or stricter thresholds can be configured for high-ghosting-risk areas (such as the status bar and navigation bar), while monitoring intensity can be reduced for dynamic content areas (such as video playback areas) to save resources. Furthermore, zoned detection of the display area can reduce frequent intervention in non-ghosting areas. The graphics and areas of different display sub-areas can be the same or different. The number and graphics of the display sub-areas can be set according to actual conditions, and this embodiment of the invention does not limit this. For example, Figure 5 This is a schematic diagram illustrating a display area division method for a display panel according to an embodiment of the present invention. (Refer to...) Figure 5 If the display area of ​​the display panel is rectangular, then the display area can be divided into multiple rectangular display sub-areas AA1, and the multiple rectangular display sub-areas AA1 can be arranged in an array.

[0054] S120. If present, the display data of the sub-pixels in the static display sub-area will be repositioned around the sub-pixels. The repositioning area is located on one side or opposite sides of the sub-pixels.

[0055] Specifically, image retention is essentially caused by sub-pixels in static image areas maintaining the same brightness for an extended period, leading to sub-pixel aging and a difference in brightness compared to surrounding dynamic image areas. For example, a sub-pixel includes the OLED light-emitting structure and the driving circuitry that drives it. The self-emissive electroluminescent layer of the OLED structure is a thin film of organic compounds. These organic materials have a limited lifespan and will gradually degrade and age over time, significantly reducing brightness and accuracy. When a display panel displays the same image in a fixed position for a long time, the OLED light-emitting structure within that position ages faster, reducing its photoelectric conversion efficiency. When switching between different screen displays, the aging rate and conversion efficiency of the OLED structures in different areas vary, causing the viewer to see the previous content in areas where the OLED structure has aged more rapidly, resulting in image retention. The display data of sub-pixels in the static display sub-area is repositioned around the sub-pixels, forcing the same display content to alternately display on different physical sub-pixels. This prevents sub-pixels from remaining in their original positions for extended periods, thus homogenizing the aging rate and improving the ghosting problem of the display panel, thereby enhancing the display effect. Setting the repositioning area to one side or opposite sides of the sub-pixel allows the static image in the static display sub-area to move along one side or opposite sides of the static display sub-area, reducing the complexity of the repositioning of the display data of the sub-pixels in the static display sub-area. If there is no static display sub-area in the display area, the step of partitioning and detecting the display area of ​​the display panel continues.

[0056] The image retention method for display panels provided in this invention detects the display area of ​​the display panel in sections to determine whether there is a static display sub-region. If so, the display data of the sub-pixels in the static display sub-region is repositioned around the sub-pixels, causing the static image displayed in the static display sub-region to move. This avoids the sub-pixels from remaining in their positions for extended periods, thus improving the image retention problem of the display panel and enhancing its display effect. Furthermore, by setting the repositioning area to one side or opposite sides of the sub-pixels, the static image in the static display sub-region can be kept moving on one side or opposite sides of the static display sub-region, reducing the complexity of the repositioning of the display data of the sub-pixels in the static display sub-region.

[0057] Furthermore, the display data of sub-pixels in the static display sub-area is repositioned around the sub-pixels, including: synchronously repositioning the display data of all sub-pixels in the static display sub-area in the same direction and at the same distance.

[0058] By synchronously transforming the display data of all sub-pixels in the static display sub-area in the same direction and at the same distance, the display image of the static display sub-area can be shifted as a whole in the display area of ​​the display panel, avoiding display screen distortion and further improving the display effect of the display panel.

[0059] Furthermore, when the display data of the sub-pixels in the static display sub-area is repositioned around the sub-pixels, the display data of the sub-pixels in the static display sub-area is shifted slightly (e.g., ±1 to 3 sub-pixels).

[0060] By slightly shifting the display data of sub-pixels in the static display sub-area (e.g., ±1 to 3 sub-pixels), the same display content can be forced to alternately display on different physical sub-pixels. This avoids fixed sub-pixels continuously bearing high loads, thereby uniformizing the aging rate and improving the ghosting problem of static images in their original positions, thus enhancing the display panel's display effect. Simultaneously, it allows for a slight movement of the static image within the static display sub-area to one side or opposite sides, further preventing display distortion and improving the display panel's overall display quality.

[0061] Based on the above embodiments, optionally, the regions of position transformation are located on opposite sides of the sub-pixels.

[0062] By setting the area for position transformation to be located on both sides of the sub-pixel, the display data of the sub-pixel in the static display sub-area can be changed on both sides of the sub-pixel, thereby avoiding the overuse of local sub-pixels caused by unidirectional offset.

[0063] Furthermore, when the area of ​​position transformation is located on opposite sides of a sub-pixel, the distance from the transformed position on both sides to the sub-pixel can be set to be equal. For example, after moving 2 pixels to the left relative to the original position, and then moving 2 pixels to the right relative to the original position, the displayed image in the static display sub-area can move on opposite sides of the static display sub-area, avoiding overuse of local pixels caused by unidirectional offset. The displayed image in the static display sub-area can move periodically on opposite sides of the static display sub-area within a second preset time period, or it can move once on each side of the static display sub-area within the second preset time period. The second preset time can be equal to or unequal to the first preset time.

[0064] The technical solution provided by this invention ensures that the same display content is alternately displayed on different physical pixels by moving the display image in the static display sub-area at equal distances in a symmetrical direction (such as left and right or up and down), thus symmetrically distributing aging pressure. Furthermore, by symmetrically offsetting the display image in the static display sub-area on opposite sides, the static content remains visually near its original position (e.g., within ±2 pixels), and the user's perceived "center position" of the display image remains unchanged. This avoids the overall content drifting sensation caused by continuous unidirectional offset, thereby further improving the display effect of the display panel.

[0065] Figure 6 This is a flowchart of another method for eliminating image retention in a display panel provided in an embodiment of the present invention, see reference. Figure 6 Methods for eliminating image retention on display panels include:

[0066] S210. Perform partition detection on the display area of ​​the display panel to determine whether there is a static display sub-area in the display area.

[0067] S220. If it exists, then in N consecutive frames, the display data of each sub-pixel in the static display sub-area is provided to the sub-pixels around each sub-pixel for display; where N is an integer greater than or equal to 1, and the area of ​​position change is located on one side or opposite sides of the sub-pixel.

[0068] Specifically, the repositioning of the display data of sub-pixels in the static display sub-area around the sub-pixels includes: providing the display data of each sub-pixel in the static display sub-area to the surrounding sub-pixels for display in N consecutive frames; where N is an integer greater than or equal to 1, and the value of N can be set according to actual needs.

[0069] In this context, a substitute display sub-pixel can be understood as a sub-pixel that replaces an atomic pixel for display after the display data changes position. An atomic pixel is each sub-pixel in the static display sub-area that needs to shift the display data. The substitute display sub-pixels are located around the atomic pixels, and on one side or opposite sides of the atomic pixels; during each position change of the display data of the atomic pixels, there is a one-to-one correspondence between the atomic pixels and the substitute display sub-pixels.

[0070] The technical solution provided by this invention determines in real time whether to switch to a substitute display sub-pixel by using frames as the smallest time unit (e.g., 16.67ms per frame when the refresh rate of the display panel is 60Hz), ensuring that aging protection and screen updates are synchronized; and without the need for additional clock signals or sensors, it reduces the cost of the display panel and the difficulty of controlling the display data of each sub-pixel in the static display sub-area to be provided to the substitute display sub-pixels around each sub-pixel for display.

[0071] Furthermore, when the region of position change is located on either side of a sub-pixel, the display data of each sub-pixel in the static display sub-region is provided to the surrounding sub-pixels for display in N consecutive frames, including:

[0072] In a series of S frames, the display data of each sub-pixel in the static display sub-area is provided to the substitute display sub-pixel located on the first side of each sub-pixel for display;

[0073] In a continuous T-frame, the display data of each sub-pixel in the static display sub-area is provided to the substitute display sub-pixel located on the second side opposite to the first side for display;

[0074] Where T = S + T; N is an integer greater than or equal to 2, S is an integer greater than or equal to 1, and T is an integer greater than or equal to 1.

[0075] In this embodiment of the invention, by controlling the displayed image in the static display sub-area to move once on each of the opposite sides of the static display sub-area within N consecutive frames, the ghosting problem of the static image at its original position can be improved, thus enhancing the display effect of the display panel. Compared to periodic movement on the opposite sides of the static display sub-area, this also reduces the difficulty of controlling the positional changes of the displayed image in the static display sub-area. Here, N can be equal to S, or N can be different from S.

[0076] Figure 7 This is a flowchart of another method for eliminating image retention in a display panel provided in an embodiment of the present invention, see reference. Figure 7 Methods for eliminating image retention on display panels include:

[0077] S310 divides the display panel's display area into multiple display sub-areas.

[0078] S320. Determine whether there is a display sub-region among multiple display sub-regions whose display image remains unchanged within M consecutive frames; where M is an integer greater than 1.

[0079] S330. If it exists, the display sub-area whose display image remains unchanged within M consecutive frames will be determined as the static display sub-area.

[0080] S340. In N consecutive frames, the display data of each sub-pixel in the static display sub-area is provided to the surrounding sub-pixels for display; where N is an integer greater than or equal to 1, and the area of ​​position change is located on one side or opposite sides of the sub-pixel.

[0081] Specifically, the display panel's display area is partitioned for detection to determine whether a static display sub-area exists. This includes dividing the display panel's display area into multiple display sub-areas; determining whether any of these sub-areas has a display image that remains unchanged for M consecutive frames, where M frames could be 200, 300, 350, 400, 420, etc., and M can be set according to actual conditions; if such a sub-area exists, it is then designated as a static display sub-area.

[0082] Optionally, since some areas of the display sub-area may remain unchanged (i.e., display a static image), while other areas may change (i.e., display a dynamic image), the display panel's display image is partitioned for detection to determine whether a static display sub-area exists. This also includes: determining whether there is a display sub-area among multiple display sub-areas where some areas of the display image remain unchanged within M consecutive frames; if so, determining whether the ratio of the non-static image area to the area of ​​the display sub-area is less than a preset ratio; if so, determining that the display sub-area is a static display sub-area; or, determining whether the difference between the area of ​​the static image area and the area of ​​the non-static image area in the display sub-area is greater than a preset difference; if so, determining that the display sub-area is a static display sub-area.

[0083] Specifically, the system detects whether a portion of the display sub-region remains unchanged within M consecutive frames (e.g., M=300 frames) to initially screen potential static display sub-regions. If such a sub-region exists, further determination can be made based on the areas of the dynamic and static regions within it, reducing the likelihood of missed static display sub-regions. The area ratio of the non-static image region to the sub-region is calculated; if it is less than a preset ratio (e.g., 5%), the sub-region is determined to be a static display sub-region. Alternatively, the area difference between the static and non-static image regions is calculated; if it is greater than a preset difference (e.g., 200 pixels), the sub-region is determined to be a static display sub-region. During the repositioning of the display data of subpixels within a static display sub-region around the subpixels, either only the static display portion of the sub-region can be translated, or the entire display portion of the sub-region can be translated.

[0084] In this embodiment of the invention, by determining the area ratio or the difference threshold, static and mixed content sub-areas can be more intelligently distinguished, which reduces the misjudgment rate and determination difficulty of static display sub-areas while ensuring the effectiveness of image retention protection.

[0085] Based on the above embodiments, optionally, before providing the display data of each sub-pixel in the static display sub-area to the surrounding sub-pixels for display, the image retention method of the display panel further includes:

[0086] S10. Obtain the actual usage time of each sub-pixel in the display panel.

[0087] S20. Determine the total equivalent aging time of each sub-pixel based on the actual usage time of each sub-pixel.

[0088] S30. Obtain the aging curve, and determine the brightness decay of each sub-pixel based on the aging curve and the total equivalent aging time; the aging curve is the relationship curve between the equivalent aging time and the brightness decay.

[0089] S40 compensates for the display data of each sub-pixel based on the brightness attenuation of each sub-pixel and the target attenuation.

[0090] Specifically, because subpixels experience different levels of aging when operating at different brightness levels for the same amount of time—for example, operating at maximum brightness for one hour may be equivalent to operating at low brightness for several hours—it is necessary to determine the total equivalent aging time for each subpixel based on its actual usage time. The total equivalent aging time can be understood as converting the aging effects of subpixels under different usage conditions (such as high brightness and high color levels) into a unified time index; it can be calculated based on an accelerated aging model, combined with weighted calculations of parameters such as usage time, brightness, and temperature.

[0091] The aging curve is a curve showing the relationship between equivalent aging time and brightness decay rate obtained from experimental test data. The brightness decay trend of sub-pixels is experimentally measured (e.g., the curve showing brightness decrease over time). For example, the brightness of a certain sub-pixel may decay to 80% of its initial value after 1000 hours of equivalent aging time. The target decay curve can be understood as the set ideal aging curve, specifically the relationship between equivalent aging time and target brightness decay rate. For example, it is expected that the brightness of all sub-pixels will decay to 85% of its initial value after 1000 hours of equivalent aging time. The driver chip compares the deviation between the actual aging curve and the target curve and compensates for the display data of each sub-pixel to dynamically adjust the grayscale brightness. By balancing the brightness decay of each sub-pixel, image retention caused by localized aging is reduced. Based on this, by providing the compensated display data of each sub-pixel in the static display sub-area to the surrounding sub-pixels for display in N consecutive frames, the image retention problem of the display panel can be further improved, enhancing the display effect.

[0092] This invention also provides a display panel ghosting elimination device for performing the display panel ghosting elimination method described in any embodiment of this invention. Figure 8 This is a structural block diagram of a display panel image retention elimination device provided in an embodiment of the present invention, with reference to... Figure 8 The image retention device for the display panel includes:

[0093] The detection module 10 is used to perform partition detection on the display area of ​​the display panel to determine whether there is a static display sub-area in the display area;

[0094] The data transposition module 20 is used to change the position of the display data of the sub-pixel in the static display sub-area around the sub-pixel; wherein the area of ​​position change is located on one side or opposite sides of the sub-pixel.

[0095] Specifically, during the detection process of the display panel, the detection module 10 divides the display panel into multiple sub-regions. It detects each sub-region to determine whether a static display sub-region exists. A static display sub-region can be understood as a sub-region where the displayed image remains unchanged for M consecutive frames, where M is an integer greater than 1, and the value of M can be set according to actual conditions. A static display sub-region can also be understood as a sub-region where the displayed content remains unchanged for a first preset time period, which can be set according to actual conditions, such as 10 minutes, 15 minutes, 20 minutes, 30 minutes, etc. The time conditions or frame count conditions for different display sub-regions to be determined as static display sub-regions can be the same or different.

[0096] The data transposition module 20 repositions the display data of sub-pixels in the static display sub-area around the sub-pixels, forcing the same display content to be displayed alternately on different physical sub-pixels. This prevents sub-pixels from remaining in their original positions for extended periods, thus homogenizing the aging rate and improving the ghosting problem of the display panel, thereby enhancing the display effect. Setting the repositioning area to one side or opposite sides of the sub-pixel allows the static image in the static display sub-area to move along one side or opposite sides of the static display sub-area, reducing the complexity of repositioning the display data of sub-pixels in the static display sub-area. If there is no static display sub-area in the display area, the step of partitioning and detecting the display area of ​​the display panel continues.

[0097] The image retention device for a display panel provided in this embodiment of the invention uses a detection module 10 to perform partitioned detection on the display area of ​​the display panel, determining whether there is a static display portion in the display image, i.e., determining whether there is a static display sub-area in the display area. If so, the data transposition module 20 performs position transformation on the display data of the sub-pixels in the static display sub-area around the sub-pixels, causing the display position of the static image in the static display sub-area to move, thereby avoiding the sub-pixels from remaining unchanged in their position for a long time. This can improve the image retention problem of the static image in its original position and enhance the display effect of the display panel. In addition, by setting the position transformation area to be located on one side or opposite sides of the sub-pixel, the static image in the static display sub-area can be kept moving on one side or opposite sides of the static display sub-area, reducing the complexity of the position transformation of the display data of the sub-pixels in the static display sub-area.

[0098] Furthermore, when the region of position transformation is located on opposite sides of the sub-pixel, the distance from the transformed positions on opposite sides to the sub-pixel is equal.

[0099] Optionally, the data transposition module 10 includes: a data transposition unit, used to transform the display data of each sub-pixel in the static display sub-area in the same direction and at the same distance, so that the display image of the static display sub-area is shifted as a whole in the display area of ​​the display panel.

[0100] Optionally, the data transposition module 10 further includes a pixel driving unit, used to provide the display data of each sub-pixel in the static display sub-area to the surrounding sub-pixels for display in N consecutive frames; where N is an integer greater than or equal to 1.

[0101] Optionally, when the position change area is located on opposite sides of a sub-pixel, the pixel driving unit is specifically used to provide the display data of each sub-pixel in the static display sub-area to the substitute display sub-pixel located on the first side of each sub-pixel for display in S consecutive frames, and to provide the display data of each sub-pixel in the static display sub-area to the substitute display sub-pixel located on the second side opposite to the first side of each sub-pixel for display in T consecutive frames; where T = S + T; N is an integer greater than or equal to 2, S is an integer greater than or equal to 1, and T is an integer greater than or equal to 1.

[0102] Optionally, the detection module 10 includes:

[0103] Sub-area division unit, used to divide the display area of ​​the display panel into multiple display sub-areas;

[0104] The static display sub-area determination unit is used to determine whether there is a display sub-area among multiple display sub-areas whose display image remains unchanged within M consecutive frames; if so, the display sub-area is determined as a static display sub-area; where M is an integer greater than 1.

[0105] Furthermore, the static display sub-region determination unit is also used to determine whether there is a display sub-region among the multiple display sub-regions whose display image remains unchanged in a portion of a continuous M frames; if so,

[0106] Then determine whether the ratio of the non-static screen area in the display sub-area to the area of ​​the display sub-area is less than a preset ratio. If so, then determine that the display sub-area is a static display sub-area.

[0107] Alternatively, determine whether the difference between the area of ​​the static screen area and the area of ​​the non-static screen area in the display sub-area is greater than a preset difference. If so, then determine that the display sub-area is a static display sub-area.

[0108] Optionally, the image retention device for the display panel also includes a data compensation module, used to obtain the actual usage time of each sub-pixel in the display panel, determine the total equivalent aging time of each sub-pixel based on the actual usage time of each sub-pixel, and obtain an aging curve, determine the brightness decay of each sub-pixel based on the aging curve and the total equivalent aging time, and compensate the display data of each sub-pixel based on the brightness decay and the target decay; wherein, the aging curve is the relationship curve between the equivalent aging time and the brightness decay.

[0109] The image retention elimination device for display panels provided in this embodiment of the invention can execute the image retention elimination method for display panels provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0110] This invention also provides a display device, including a display panel and a ghosting elimination device for the display panel as described in any embodiment of this invention. Therefore, this display device also possesses the beneficial effects described in any of the above embodiments. The ghosting elimination device for the display panel can be integrated onto a driver chip within the display device. Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention, for reference. Figure 9 In this embodiment, the display device 100 can be a mobile phone or any electronic product with display function, including but not limited to the following categories: display panels in products such as televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, and touch interactive terminals. This embodiment of the invention does not impose any special limitations on this.

[0111] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for eliminating image retention on a display panel, characterized in that, include: The display area of ​​the display panel is partitioned for detection to determine whether there is a static display sub-area in the display area; If present, the display data of the sub-pixels in the static display sub-area will be repositioned around the sub-pixels, with the repositioning area located on one side or opposite sides of the sub-pixels.

2. The method for eliminating image retention on a display panel according to claim 1, characterized in that, When the region of position transformation is located on both sides of the sub-pixel, the distance from the transformed position on both sides to the sub-pixel is equal.

3. The method for eliminating image retention on a display panel according to claim 1, characterized in that, The step of repositioning the display data of the sub-pixels in the static display sub-area around the sub-pixels includes: In N consecutive frames, the display data of each sub-pixel in the static display sub-area is provided to the surrounding sub-pixels for display; where N is an integer greater than or equal to 1.

4. The method for eliminating image retention on a display panel according to claim 1, characterized in that, The step of repositioning the display data of the sub-pixels in the static display sub-area around the sub-pixels includes: The display data of all sub-pixels in the static display sub-area are synchronously transformed in the same direction and at the same distance, so that the display image of the static display sub-area is shifted as a whole in the display area of ​​the display panel.

5. The method for eliminating ghosting according to claim 3, characterized in that, When the region of position change is located on either side of the sub-pixel, the step of providing the display data of each sub-pixel in the static display sub-area to the surrounding sub-pixels for display in N consecutive frames includes: In a series of S frames, the display data of each sub-pixel in the static display sub-area is provided to the substitute display sub-pixel located on the first side of each sub-pixel for display; In a continuous T-frame, the display data of each sub-pixel in the static display sub-area is provided to the substitute display sub-pixel located on the second side opposite to the first side for display; Where T = S + T; N is an integer greater than or equal to 2, S is an integer greater than or equal to 1, and T is an integer greater than or equal to 1.

6. The method for eliminating image retention on a display panel according to claim 1, characterized in that, The step of performing partition detection on the display panel to determine whether there is a static display sub-area in the display area includes: The display area of ​​the display panel is divided into multiple display sub-areas; Determine whether there is a display sub-region among multiple display sub-regions whose display image remains unchanged within M consecutive frames; where M is an integer greater than 1; If it exists, then the display sub-area will be designated as a static display sub-area.

7. The method for eliminating image retention in a display panel according to claim 6, characterized in that, The step of performing partition detection on the display panel to determine whether there is a static display sub-area in the display area further includes: Determine whether any of the multiple display sub-regions has a portion of its display area that remains unchanged within M consecutive frames; if so, Then determine whether the ratio of the non-static screen area in the display sub-area to the area of ​​the display sub-area is less than a preset ratio. If so, determine that the display sub-area is a static display sub-area. Alternatively, determine whether the difference between the area of ​​the static screen area and the area of ​​the non-static screen area in the display sub-area is greater than a preset difference. If so, then determine that the display sub-area is a static display sub-area.

8. The method for eliminating image retention in a display panel according to any one of claims 1 to 7, characterized in that, Also includes: Obtain the actual usage time of each sub-pixel in the display panel; The total equivalent aging time of each sub-pixel is determined based on the actual usage time of each sub-pixel. Obtain the aging curve, and determine the brightness decay of each sub-pixel based on the aging curve and the total equivalent aging time; the aging curve is the relationship curve between the equivalent aging time and the brightness decay. The display data of each sub-pixel is compensated based on the brightness attenuation of each sub-pixel and the target attenuation.

9. A device for eliminating image retention on a display panel, characterized in that, include: The detection module is used to perform partition detection on the display area of ​​the display panel to determine whether there is a static display sub-area in the display area; The data transposition module is used to reposition the display data of the sub-pixels in the static display sub-area around the sub-pixels; wherein the repositioning area is located on one side or opposite sides of the sub-pixels.

10. A display device, characterized in that, Includes a display panel and the image retention device for the display panel as described in claim 9.

Images