Brightness compensation method, compensation parameter generation method and related devices for display panels

Abstract

This application discloses a brightness compensation method, a compensation parameter generation method, and related apparatus for a display panel. The method includes: responding to a frequency switching command, determining corresponding compensation parameters based on the current brightness level, a first refresh frequency, and a second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch; adjusting the light-emitting time ratio at the second refresh frequency according to the compensation parameters. According to embodiments of this application, by adjusting the light-emitting time ratio at the refresh frequency after the switch during the refresh frequency switching process, the display brightness after the switch can be made closer to the display brightness before the switch, reducing the difference in display brightness before and after the refresh frequency switch and improving the flicker problem during the refresh frequency switching process.

Description

Technical Field

[0001] This application belongs to the field of display panel technology, and particularly relates to a brightness compensation method, a compensation parameter generation method, and related apparatus for a display panel. Background Technology

[0002] With the continuous development of display panel technology, OLED (Organic Light-Emitting Diode) devices and other light-emitting devices have been gradually applied to various display panel products such as mobile phones, tablets, and laptops.

[0003] To reduce power consumption during the display process, display panel technologies that support low refresh rates have emerged. For example, LTPO (Low Temperature Polycrystalline Oxide) can support lower refresh rates, with some reaching as low as 1Hz.

[0004] However, when the display panel switches between high and low refresh rates, the brightness of the displayed image will change significantly, resulting in screen flickering and affecting the user's viewing experience. Summary of the Invention

[0005] This application provides a brightness compensation method, a compensation parameter generation method, and related apparatus for a display panel, which can improve the technical problem of flickering caused by brightness changes during refresh frequency switching.

[0006] In a first aspect, embodiments of this application provide a brightness compensation method for a display panel, the method comprising:

[0007] In response to the frequency switching command, the corresponding compensation parameters are determined based on the current brightness level, the first refresh frequency, and the second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch.

[0008] Adjust the percentage of light emission time at the second refresh rate according to the compensation parameters.

[0009] In some embodiments, in response to a frequency switching command, a corresponding compensation parameter is determined based on the current brightness level, a first refresh rate, and a second refresh rate, including:

[0010] In response to a frequency switching command, based on a first refresh frequency and a second refresh frequency, a brightness level and compensation parameter correspondence that matches the switching from the first refresh frequency to the second refresh frequency is determined from multiple brightness level and compensation parameter correspondences; the refresh frequencies before the switching correspondences of the multiple brightness level and compensation parameter correspondences are different, and / or the refresh frequencies after the switching correspondences of the multiple brightness level and compensation parameter correspondences are different.

[0011] Determine the compensation parameter corresponding to the current brightness level from the matched correspondence between brightness levels and compensation parameters;

[0012] In some embodiments, the grayscale values ​​of the binding points corresponding to the multiple brightness levels and compensation parameters are all the same grayscale value of the binding point.

[0013] In some embodiments, the grayscale corresponding to the multiple brightness levels and compensation parameters is the maximum grayscale.

[0014] In some embodiments, adjusting the proportion of light emission time at the second refresh frequency according to compensation parameters includes:

[0015] Obtain the original emission time percentage corresponding to the second refresh frequency;

[0016] The target emission time percentage is determined based on the compensation parameters and the original emission time percentage.

[0017] In some embodiments, the target emission time percentage EM2 = EM1 * (1 + Ni);

[0018] Wherein, EM1 is the original emission time percentage, EM2 is the target emission time percentage, and Ni is the compensation parameter.

[0019] In some embodiments, after adjusting the proportion of light emission time at the second refresh frequency according to the compensation parameters, the method further includes:

[0020] Starting from the first frame after the refresh rate switch, a light emission control signal is generated based on the target light emission time ratio; the light emission control signal is used to selectively allow the light emission element to emit light.

[0021] Secondly, embodiments of this application provide a method for generating compensation parameters, the method comprising:

[0022] When the display panel displays an image corresponding to the grayscale of the first bound point at at least two refresh rates and at least two brightness levels, obtain the display brightness value corresponding to the grayscale of the first bound point respectively.

[0023] Based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level, determine the compensation parameters corresponding to different refresh rate switching methods at each brightness level.

[0024] The compensation parameters are stored in the display panel; the display panel is used to implement the brightness compensation method of the display panel in the first aspect according to the compensation parameters.

[0025] In some embodiments, when the display panel displays images corresponding to the first bound point grayscale at at least two refresh rates and different brightness levels, obtaining the display brightness values ​​corresponding to the first bound point grayscale respectively includes:

[0026] When at least some display panels display images corresponding to the first binding point grayscale at different refresh rates and different brightness levels, obtain the luminous brightness corresponding to the first binding point grayscale at different refresh rates and / or different brightness levels of at least some display panels.

[0027] Based on the luminance of each display panel, determine the display brightness value corresponding to the first grayscale of each brightness level and each refresh rate.

[0028] In some embodiments, compensation parameters corresponding to different refresh rate switching methods at each brightness level are determined based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level, including:

[0029] Based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level, determine the brightness difference between at least two refresh rates at the first binding point grayscale.

[0030] Based on the brightness difference and the display brightness value corresponding to each refresh rate, determine the compensation parameters corresponding to different refresh rate switching methods at each brightness level.

[0031] Thirdly, embodiments of this application provide a brightness compensation device for a display panel, the device comprising:

[0032] The parameter determination module is used to respond to the frequency switching command and determine the corresponding compensation parameters based on the current brightness level, the first refresh frequency, and the second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch.

[0033] The brightness compensation module is used to adjust the proportion of light emission time at the second refresh frequency according to the compensation parameters.

[0034] Fourthly, embodiments of this application provide a brightness compensation device for a display panel, the brightness compensation device for the display panel including: a processor and a memory storing computer program instructions;

[0035] The processor executes computer program instructions to implement the brightness compensation method for the display panel in the above embodiments.

[0036] Fifthly, embodiments of this application provide a computer storage medium storing computer program instructions, which, when executed by a processor, implement the brightness compensation method for the display panel described in the above embodiments.

[0037] Compared with the prior art, the brightness compensation method, compensation parameter generation method and related device for display panels provided in this application embodiment can, when the refresh frequency is switched, respond to the frequency switching command and determine the compensation parameters corresponding to the refresh frequency switching process based on the current brightness level, the first refresh frequency before the switch and the second refresh frequency after the switch. Based on the compensation parameters, the proportion of light emission time under the second refresh frequency after the switch can be adjusted so that the display brightness of the display panel under the second refresh frequency after the switch is close to the display brightness under the first refresh frequency before the switch after brightness compensation, thereby reducing the difference in display brightness before and after the refresh frequency switch and improving the flickering problem caused by the change in display brightness during the refresh frequency switching process. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the 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.

[0039] Figure 1 This is a schematic flowchart of a brightness compensation method for a display panel provided in an embodiment of this application;

[0040] Figure 2 This is a flowchart illustrating a brightness compensation method for a display panel provided in another embodiment of this application;

[0041] Figure 3 This is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of this application;

[0042] Figure 4 This is a flowchart illustrating a brightness compensation method for a display panel provided in another embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the circuit structure of a pixel circuit provided in an embodiment of this application;

[0044] Figure 6 This is a schematic diagram illustrating the timing change of the proportion of light emission time during refresh frequency switching according to an embodiment of this application;

[0045] Figure 7 This is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of this application;

[0046] Figure 8 This is a flowchart illustrating a brightness compensation method for a display panel provided in another embodiment of this application;

[0047] Figure 9 This is a flowchart illustrating a brightness compensation method for a display panel according to another embodiment of this application;

[0048] Figure 10 This is a table showing the correspondence between compensation parameters provided in one embodiment of this application;

[0049] Figure 11 This refers to the brightness difference between each frame image in an existing refresh rate switching method provided in an embodiment of this application;

[0050] Figure 12 This refers to the brightness difference between each frame image in the method of adjusting the emission time ratio of the refresh frequency after switching provided in one embodiment of this application;

[0051] Figure 13 A schematic diagram of the structure of a brightness compensation device for a display panel provided in an embodiment of this application;

[0052] Figure 14 This is a schematic diagram of the structure of a brightness compensation device for a display panel provided in an embodiment of this application. Detailed Implementation

[0053] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The embodiments will now be described in detail with reference to the accompanying drawings.

[0056] With the continuous development of display panel technology, OLED (Organic Light-Emitting Diode) devices and other light-emitting devices have been gradually applied to various display panel products such as mobile phones, tablets, and laptops.

[0057] To reduce power consumption during the display process, display panel technologies that support low refresh rates have emerged. For example, LTPO (Low Temperature Polycrystalline Oxide) can support lower refresh rates, with some reaching as low as 1Hz.

[0058] However, when display panel products switch between high and low refresh rates, the brightness of the displayed image will change noticeably, causing screen flickering and affecting the user's viewing experience. For example, when the display panel switches from 120Hz to 1Hz, the number of hold frames at the lower refresh rate increases, resulting in a brightness difference between the data writing frames and the hold frames. This causes a decrease in the display brightness at the lower refresh rate, resulting in a noticeable brightness jump in the displayed image, and the user can perceive the screen flickering when the refresh rate switches.

[0059] To address the aforementioned technical problems, embodiments of this application provide a brightness compensation method for a display panel, a compensation parameter generation method, and related apparatus. The brightness compensation method for a display panel provided in this application embodiment will be described first below.

[0060] Figure 1 A schematic flowchart of a brightness compensation method for a display panel according to an embodiment of this application is shown. The brightness compensation method for the display panel includes:

[0061] S110, in response to the frequency switching command, determines the corresponding compensation parameters based on the current brightness level, the first refresh frequency, and the second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch.

[0062] S120, adjusts the proportion of light emission time at the second refresh frequency according to the compensation parameters.

[0063] The brightness compensation method for a display panel provided in this embodiment can be applied to a brightness compensation device for a display panel. This device can correct the brightness of the display panel by adjusting the proportion of light emission time when the refresh rate switches, thereby improving the problem of significant brightness changes and flickering caused by refresh rate switching, and enhancing the compensation effect and display uniformity of the display panel. This display panel can be installed in a PC, television, smart terminal, or tablet computer, etc. This embodiment does not limit the specific form of the display panel.

[0064] In this embodiment, when the refresh rate is switched, the display panel can respond to the frequency switching command and determine the compensation parameters corresponding to the refresh rate switching process based on the current brightness level, the first refresh rate before the switch, and the second refresh rate after the switch. Based on the compensation parameters, the proportion of light emission time under the second refresh rate after the switch can be adjusted so that the display brightness of the display panel under the second refresh rate after the switch is close to the display brightness under the first refresh rate before the switch after brightness compensation, thereby reducing the difference in display brightness before and after the refresh rate switch and improving the flickering problem caused by the change in display brightness during the refresh rate switching process.

[0065] In S110, the display panel can obtain the brightness level of the current display state when displaying an image.

[0066] The display panel can determine the brightness level corresponding to the brightness range DBVBand of the Display Brightness Value (DBV). For example, different brightness ranges can correspond to HDR (High Dynamic Range Imaging), HBM (High Brightness Monitor), and multiple Normal brightness levels. Among these, the brightness values ​​of each emitting pixel are higher at the maximum grayscale under the HDR and HBM brightness levels. For instance, the brightness value of the display panel at the highest grayscale under the HDR brightness level can reach 1000 nits or more, and the brightness value under the HBM brightness level can reach 700 nits or more. The multiple Normal brightness levels can correspond to 460 nits, 300 nits, 120 nits, 50 nits, 20 nits, 10 nits, 6 nits, or other emitting brightness levels, without limitation.

[0067] When displaying images on the display panel, if the user needs to adjust the current refresh rate, or if the currently displayed content meets the conditions for switching refresh rates, a corresponding frequency switching command can be triggered. This frequency switching command should include the refresh rate to be switched.

[0068] Frequency switching commands can be generated in various application scenarios. For example, when a user wants to adjust to a higher or lower refresh rate, they can trigger the frequency switching command via remote control, smart device, voice control, or button control. If the image content currently displayed on the display panel meets the requirement of a higher refresh rate, a frequency switching command can also be triggered to increase the refresh rate, providing a better viewing experience for the user. Furthermore, to reduce power consumption, the display panel can switch from a higher refresh rate to a lower refresh rate by triggering a frequency switching command, thereby reducing display power consumption.

[0069] After receiving a frequency switching command, the display panel can respond to the command by performing brightness compensation during the frequency switching process. To indicate the new refresh rate to the display panel, the frequency switching command should include the new refresh rate, i.e., the second refresh rate. The refresh rate before the switch is the current refresh rate of the display panel, which can be directly obtained.

[0070] After determining the current brightness level, the display panel can determine the corresponding compensation parameters based on the first refresh rate and the second refresh rate. These compensation parameters are the parameters required for brightness compensation when the display panel switches from the first refresh rate to the second refresh rate at the current brightness level, in order to reduce the brightness difference between the two refresh rates.

[0071] It should be noted that, at the same brightness level, the compensation parameters when the display panel switches from the first refresh rate to the second refresh rate are different from those when switching from the second refresh rate to the first refresh rate. In other words, swapping the refresh rates before and after the switch will result in different compensation parameters.

[0072] Taking a single refresh rate switching process as an example, when the display panel switches from a refresh rate of 120Hz to a refresh rate of 1Hz, the number of data frames written in the same time interval decreases while the number of frames held increases. This will cause a sudden decrease in brightness when the display panel switches from a higher refresh rate to a lower refresh rate, which will make users perceive flickering during the refresh rate switching process and affect the user's viewing experience.

[0073] After determining the refresh rates before and after the frequency switching command, a compensation parameter can be determined based on the current brightness level during the refresh rate switching process. This compensation parameter characterizes the brightness difference between the two refresh rates before and after the switch at the current brightness level. By compensating for the luminous brightness after the refresh rate switch using this compensation parameter, the luminous brightness after the refresh rate switch can be made closer to the luminous brightness before the refresh rate switch, thereby reducing the brightness difference between the two different refresh rates during the refresh rate switching process and improving the flickering phenomenon.

[0074] Please refer to Figure 2 As an optional embodiment, the above-described S110 may include:

[0075] S210, in response to the frequency switching command, based on the first refresh frequency and the second refresh frequency, determine the brightness level and compensation parameter correspondence that matches the switching from the first refresh frequency to the second refresh frequency from multiple brightness level and compensation parameter correspondences; the refresh frequencies before the switching are different for the multiple brightness level and compensation parameter correspondences, and / or the refresh frequencies after the switching are different for the multiple brightness level and compensation parameter correspondences.

[0076] S220, determine the compensation parameter corresponding to the current brightness level from the matching brightness level and compensation parameter correspondence.

[0077] In this embodiment, the display panel can determine the second refresh frequency after switching according to the frequency switching command, and determine the current refresh frequency as the first refresh frequency. Based on the first and second refresh frequencies, a brightness level and compensation parameter correspondence matching the switch from the first refresh frequency to the second refresh frequency can be determined from multiple brightness level and compensation parameter correspondences. Based on the current brightness level, the compensation parameter corresponding to the current brightness level can be indexed from the brightness level and compensation parameter correspondence matching the switch from the first refresh frequency to the second refresh frequency, so that brightness compensation after the refresh frequency switch can be achieved based on this compensation parameter.

[0078] In S210, the display panel can determine the refresh rate after switching, i.e., the second refresh rate, based on the frequency switching command. The first refresh rate is the current refresh rate. After determining the first and second refresh rates, the display panel can determine the brightness level and compensation parameter correspondence that matches the switch from the first refresh rate to the second refresh rate from multiple brightness level and compensation parameter correspondences.

[0079] The display panel can pre-store multiple brightness levels and their corresponding compensation parameters, which can be correlated with a first refresh rate and a second refresh rate. After determining the first and second refresh rates, the display panel can determine the corresponding brightness level and compensation parameter relationship for switching from the first refresh rate to the second refresh rate from these multiple relationships. For example, if the display panel determines the first refresh rate to be 120Hz and the second refresh rate to be 1Hz, it can determine the corresponding brightness level and compensation parameter relationship for switching from 120Hz to 1Hz from these multiple relationships.

[0080] Taking a first refresh rate of 120Hz and a second refresh rate of 1Hz as an example, the correspondence between the matched brightness level and the compensation parameter can be the compensation parameters corresponding to different brightness levels of the display panel when switching from 120Hz to 1Hz.

[0081] As an optional implementation, when the grayscale range is 0-255, the first binding point grayscale can be one of multiple binding point grayscales, such as 255 grayscale. Taking Normal3 brightness level as an example, the display panel can display a 255 grayscale image at Normal3 brightness level using refresh rates of 120Hz and 1Hz respectively, and obtain the display brightness values ​​at 120Hz and 1Hz through optical devices. Based on the two display brightness values ​​at 120Hz and 1Hz, the compensation parameters corresponding to the switch from 120Hz to 1Hz at Normal3 brightness level and 255 grayscale can be determined.

[0082] In the above embodiment, taking two different refresh rates of 120Hz and 1Hz as examples, after determining the compensation parameters corresponding to switching from 120Hz to 1Hz based on the brightness difference between 120Hz and 1Hz at Normal3 brightness level and 255 grayscale, the display panel can be driven to display images at 120Hz and 1Hz at other brightness levels, and the compensation parameters corresponding to other brightness levels can be determined based on the two display brightness values ​​at other brightness levels.

[0083] After obtaining the compensation parameters corresponding to each brightness level, a correspondence between brightness levels and compensation parameters when switching from 120Hz to 1Hz can be generated. This correspondence includes the compensation parameters corresponding to each brightness level.

[0084] Similarly, by adjusting the first and second refresh rates, the corresponding brightness levels and compensation parameters during different refresh rate switching processes can be obtained. For example, with a first refresh rate of 120Hz and a second refresh rate of 60Hz, the corresponding brightness level and compensation parameter relationship when switching from 120Hz to 60Hz can be obtained; with a first refresh rate of 90Hz and a second refresh rate of 120Hz, the corresponding brightness level and compensation parameter relationship when switching from 900Hz to 120Hz can be obtained. The first and second refresh rates mentioned above can be any two of the multiple refresh rates supported by the display panel, and are not limited here.

[0085] When the refresh rate switches from 120Hz to 1Hz, the display panel's brightness will decrease. To reduce the brightness difference between the refresh rate before and after the switch, the corresponding compensation parameters should compensate for the increased brightness after the switch. Conversely, when the refresh rate switches from 1Hz to 120Hz, the display panel's brightness will increase, and the corresponding compensation parameters should compensate for the decreased brightness after the switch. In other words, the correspondence between the brightness level and compensation parameters when switching from 120Hz to 1Hz is different from the correspondence when switching from 1Hz to 120Hz. Specifically, when the first and second refresh rates are interchanged, the corresponding brightness level and compensation parameter correspondence is not the same.

[0086] At different refresh rates, the emission control signal EM uses different emission time ratios, which results in a fixed emission time ratio at a single refresh rate. Therefore, at the same refresh rate, the brightness cannot be changed by adjusting the emission time ratio. In this embodiment, the emission time ratio after refresh rate switching is adjusted according to compensation parameters, while the emission time ratio before switching can be flexibly adjusted to achieve brightness variations.

[0087] It should be noted that the aforementioned correspondences between multiple brightness levels and compensation parameters are calculated and generated during the production and testing phase of the display panel by driving the display panel to display corresponding images and obtaining the corresponding display brightness values. These correspondences can be stored in the display panel's storage module after calculation. The display panel's driver chip can respond to frequency switching commands, read the corresponding brightness level and compensation parameter relationships from the storage module that match the switch from the first refresh frequency to the second refresh frequency, and adjust the light-emitting time ratio at the second refresh frequency according to the corresponding compensation parameters.

[0088] In S220, the display panel can determine the compensation parameter corresponding to the current brightness level from the matching brightness level and compensation parameter correspondence.

[0089] The matched brightness level and compensation parameter correspondence includes multiple compensation parameters, each corresponding to a different brightness level. After determining the matched brightness level and compensation parameter correspondence from these multiple correspondences, the display panel can then determine the compensation parameter corresponding to the current brightness level from among the multiple compensation parameters included in that matched brightness level and compensation parameter correspondence.

[0090] The first binding point grayscale mentioned above can be one of multiple binding point grayscales, such as 255 grayscale, 128 grayscale, 64 grayscale, etc.

[0091] As an optional implementation, the binding point grayscale corresponding to multiple brightness levels and compensation parameters can all be the same binding point grayscale. For example, when switching from 120Hz to 1Hz, the first binding point grayscale selected in the brightness level and compensation parameter correspondence can be grayscale 255. The first binding point grayscale selected in the brightness level and compensation parameter correspondence for other different refresh frequencies before and after the switch can also be grayscale 255.

[0092] In one exemplary embodiment, the grayscale corresponding to the multiple brightness levels and compensation parameters can be the largest grayscale among the multiple grayscales.

[0093] Based on the display brightness values ​​corresponding to the two refresh rates at the first binding point grayscale, the brightness difference between the two refresh rates at the same grayscale and brightness level can be determined. When the first binding point grayscale is the maximum binding point grayscale, the display brightness value of the image is at its maximum, which allows for a more accurate calculation of the brightness difference between the two refresh rates and improves the accuracy of the compensation parameters.

[0094] In S120, after determining the compensation parameter corresponding to the switching mode from the first refresh frequency to the second refresh frequency under the current brightness level, the proportion of light emission time under the second refresh frequency can be adjusted according to the compensation parameter.

[0095] The emission time percentage (EMduty) refers to the ratio of the duration of the emission control signal as an enable signal to the period of the emission frame within a single emission frame. In other words, the emission time percentage indicates the emission duration within a single emission frame. The larger the emission time percentage, the longer the emission duration within a single emission frame.

[0096] The compensation parameter characterizes the brightness difference between the two refresh rates during the refresh rate switching process, specifically at their respective light-emitting time percentages. Based on this brightness difference, the light-emitting time percentage at the second refresh rate can be adjusted to ensure a difference between the pre- and post-refresh-rate percentages. This makes the display brightness value at the refresh rate after the switch closer to the pre-switch brightness value, thus reducing the brightness difference and improving flicker. If the first refresh rate is higher than the second refresh rate, the light-emitting time percentage increases. If the first refresh rate is lower than the second refresh rate, the light-emitting time percentage decreases.

[0097] As an optional embodiment, when the display panel switches from a higher refresh rate to a lower refresh rate, if the proportion of light emission time remains unchanged, the brightness value of the displayed image after the switch will be lower than the brightness value before the switch. This results in a significant brightness difference between the first frame image after the switch and the image before the switch, causing the user to perceive flicker. By using a compensation parameter that characterizes the brightness difference between the two refresh rates, the proportion of light emission time at the second refresh rate after the switch can be increased, thereby increasing the actual brightness of the first frame image after the switch. This reduces the brightness difference between the first frame image after the switch and the image before the switch, improving the flicker phenomenon.

[0098] Correspondingly, when the display panel switches from a lower refresh rate to a higher refresh rate, if the proportion of light-emitting time remains unchanged, the brightness value after the switch will increase. To reduce the brightness difference before and after the switch and improve flicker, the display panel can reduce the proportion of light-emitting time at the second refresh rate after the switch, based on compensation parameters, thus reducing the actual brightness of the first frame image after the switch. In other words, during the refresh rate switching process, when switching from a higher frequency to a lower frequency, the proportion of light-emitting time at the second refresh rate can be increased based on compensation parameters; conversely, when switching from a lower frequency to a higher frequency, the proportion of light-emitting time at the second refresh rate can be decreased based on compensation parameters.

[0099] Please refer to Figure 3 As an optional embodiment, the above-described S120 may include:

[0100] S310, obtain the original light emission time percentage corresponding to the second refresh frequency;

[0101] S320 determines the target emission time percentage based on compensation parameters and the original emission time percentage.

[0102] In this embodiment, the initial light-emitting time percentage corresponding to the second refresh frequency is the original light-emitting time percentage. To ensure that the display brightness at the second refresh frequency is close to that at the first refresh frequency, the original light-emitting time percentage needs to be adjusted. The target light-emitting time percentage can be determined using compensation parameters and the original light-emitting time percentage. By adjusting the light-emitting time percentage at the second refresh frequency to the target light-emitting time percentage, the display brightness at the second refresh frequency can be made close to that at the first refresh frequency, thereby reducing the brightness difference during refresh frequency switching.

[0103] In S310, after determining the compensation parameters corresponding to the refresh rate switch, the display panel can obtain the original light-emitting time percentage corresponding to the second refresh rate. If the light-emitting time percentage does not change during the refresh rate switch, the light-emitting time percentage before and after the switch will remain consistent. Therefore, the unchanged original light-emitting time percentage corresponding to the second refresh rate is the same as the light-emitting time percentage at the first refresh rate before the switch.

[0104] In S320, after determining the original emission time percentage corresponding to the second refresh frequency, it can be determined that if the emission time percentage does not change before and after the refresh frequency switch, there will be a brightness difference before and after the refresh frequency switch. To reduce the brightness difference before and after the refresh frequency switch, the original emission time percentage corresponding to the second refresh frequency can be adjusted to the target emission time percentage based on the compensation parameters corresponding to this switching process. For example, if the brightness decreases after the switch compared to before the switch, the emission time percentage can be increased to increase the brightness after the switch, at which point the target emission time percentage is greater than the original emission time percentage. If the brightness increases after the switch compared to before the switch, the emission time percentage can be decreased to decrease the brightness after the switch, at which point the target emission time percentage is less than the original emission time percentage.

[0105] As an optional embodiment, the calculation formula for the above compensation parameters can be:

[0106] △L=(L1-L2);

[0107] Ni = ΔL / (L2);

[0108] Where L1 is the display brightness value corresponding to the first bound point grayscale at the first refresh frequency before switching; L2 is the display brightness value corresponding to the first bound point grayscale at the second refresh frequency after switching, before the above brightness compensation method is adopted; Ni is the compensation parameter corresponding to brightness level i.

[0109] After determining the original emission time percentage, the target emission time percentage can be determined according to the following brightness compensation formula;

[0110] EM2 = EM1 * (1 + Ni);

[0111] Wherein, EM1 is the original emission time percentage, and EM2 is the target emission time percentage.

[0112] In another alternative implementation, after determining Ni, (1+Ni) can be used as a compensation parameter to generate a correspondence between brightness levels and compensation parameters, and this correspondence can be stored in the storage module of the display panel. The display panel's driver chip can respond to a frequency switching command, read the correspondence between brightness levels and compensation parameters from the storage module, and after obtaining the stored compensation parameter (1+Ni), determine the target emission time percentage based on the product of the original emission time percentage and the compensation parameter.

[0113] Please refer to Figure 4 As an optional embodiment, after S120 above, the following may also be included:

[0114] S410 generates a light emission control signal based on the target light emission time ratio, starting from the first frame after the refresh rate switch; the light emission control signal is used to selectively allow the light emission element to emit light.

[0115] After determining the adjusted target emission time ratio at the second refresh rate based on compensation parameters, the display panel can adjust the duty cycle of the emission control signal EM to the target emission time ratio, starting from the first frame after the refresh rate switch. The emission control signal EM is then provided to the pixel circuits of each emission pixel via the emission control signal line, ensuring that the emission time of each emission pixel in a single emission frame meets the target emission time ratio.

[0116] The display panel may include multiple arrays of light-emitting pixels, each of which may include pixel circuitry and a light-emitting element. Figure 5 A schematic diagram of a 7T1C pixel circuit is shown. The pixel circuit may include a storage capacitor Cst, a driving transistor T1, two light-emitting control transistors T4 and T5, a data writing transistor T2, a compensation transistor T3, and two initialization transistors T6 and T7.

[0117] When the light-emitting control signal EM is disabled, the two light-emitting control transistors T4 and T5 are turned off, indicating a non-light-emitting stage. The gate of the driving transistor T1 and the anode of the light-emitting element L can be initialized using two initialization transistors T6 and T7, respectively. The data signal data is written to the storage capacitor Cst using the data writing transistor T2 and the compensation transistor T3. S1, S2, S3, and S4 can be the scan signals connected to the gates of T2, T3, T6, and T7, respectively. Vref1 and Vref2 are the initialization signals connected to T7 and T6, respectively.

[0118] When the light-emitting control signal EM is enabled, the two light-emitting control transistors T4 and T5 are turned on. This is the light-emitting stage, and the anode of the light-emitting element L can be connected to the power supply signal through T1, T4, and T5. When the anode and cathode of the light-emitting element L are connected to the first power supply signal ELVDD and the second power supply signal ELVss respectively, the driving transistor T1 generates a driving current based on its gate-source voltage difference, driving the light-emitting element to emit light.

[0119] In a single emission frame, a low level EM signal indicates an enable signal, and a high level indicates a disable signal. The emission time percentage is the ratio of the duration the EM signal remains low to the duration of the emission frame. For example... Figure 6 As shown, Fr1 is the first refresh frequency, and Fr2 is the second refresh frequency. If the duration (i.e., period) of a single light-emitting frame is T, then the proportion of light-emitting time at the first refresh frequency Fr1 can be EM1 = t1 / T, and the proportion of light-emitting time at the second refresh frequency Fr2 can be EM2 = t2 / T. When the refresh frequency switches from the first refresh frequency Fr1 to the second refresh frequency Fr2, the proportion of light-emitting time EM1 corresponding to the first refresh frequency Fr1 can be calculated according to the implementation method described in the above embodiments. By adjusting the proportion of light-emitting time to EM2, brightness compensation during the refresh frequency switching process can be achieved. The higher the refresh frequency, the more light-emitting frames that perform data writing in the same number of light-emitting frames, which is equivalent to more data-writing frames, and the fewer light-emitting frames that do not perform data writing, which is equivalent to fewer hold frames. The duration of a single light-emitting frame can be equal under different refresh frequencies.

[0120] The above-mentioned emission time percentage EM1 is the original emission time percentage during the refresh frequency switching process, and the emission time percentage EM2 is the target emission time percentage during the refresh frequency switching process.

[0121] A single emission frame can be driven by a single pulse or multiple pulses. In single-pulse mode, an emission frame consists of one high-low level waveform; while in multi-pulse mode, an emission frame consists of multiple high-low level waveforms. It can be understood that in multi-pulse mode, the emission time percentage is the ratio of the sum of the durations of all low-level waveforms in the multiple high-low level waveforms within a single emission frame to the duration of the single emission frame.

[0122] In this embodiment, after determining the target emission time ratio corresponding to the second refresh frequency after the refresh frequency switching process, the time interval of the enable signal of the emission control signal can be adjusted according to the target emission time ratio, so that the duration of the enable signal of the emission control signal in a single emission frame meets the target emission time ratio, thereby realizing brightness compensation after refresh frequency switching.

[0123] This application also provides a method for generating compensation parameters. Figure 7 A flowchart illustrating a compensation parameter generation method according to an embodiment of this application is shown. The compensation parameter generation method includes:

[0124] S510: When the display panel displays an image corresponding to the grayscale of the first bound point at at least two refresh rates and at least two brightness levels, the display brightness value corresponding to the grayscale of the first bound point is obtained respectively.

[0125] S520 determines the compensation parameters corresponding to different refresh rate switching methods at each brightness level based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level.

[0126] S530 stores the compensation parameters to the display panel; the display panel is used to implement the brightness compensation method of the display panel according to the compensation parameters.

[0127] In this embodiment, the compensation parameter generation method can be applied to a compensation parameter generation device. The compensation parameter generation device can be electrically connected to the display panel during production testing. By driving the display panel to display different images and obtaining the display brightness values ​​under different images, the compensation parameters corresponding to each brightness level under different refresh rate switching modes can be determined. The compensation parameter generation device can store the compensation parameters in the display panel. By generating compensation parameters and storing them in the display panel, the display panel can implement the brightness compensation method of the display panel in the above embodiment by reading the compensation parameters during the display process. In order to reduce the brightness difference before and after the refresh rate switching process of the display panel, the flicker phenomenon during refresh rate switching is improved.

[0128] In S510, during the production and testing phase of the display panel, the compensation parameter generation device can be electrically connected to the display panel and drive the display panel to perform corresponding image display.

[0129] After the compensation parameter generation device is electrically connected to the display panel, it can drive the display panel to display at least two refresh rates. At each refresh rate, it displays the image corresponding to the first bound point grayscale at different brightness levels, and obtains the display brightness value corresponding to the first bound point grayscale when the corresponding image is displayed through optical equipment.

[0130] The optical device can acquire the display brightness value of at least a portion of the display panel and use it as the overall display brightness value of the display panel. In an optional real-time mode, the optical device can acquire the display brightness value of the central area of ​​the display panel.

[0131] Taking a display panel with two refresh rates as an example, at one refresh rate, the display panel can display images corresponding to the first bound point grayscale at different brightness levels, and obtain the display brightness values ​​corresponding to the first bound point grayscale at each brightness level. The number of display brightness values ​​obtained at a single refresh rate is the same as the number of brightness levels. For example, when the display panel includes 10 brightness levels, at a single refresh rate, 10 display brightness values ​​corresponding to the first bound point grayscale at each of the 10 brightness levels can be obtained. Therefore, when the display panel displays two or more refresh rates, by driving the display panel to display images of the first bound point grayscale at each brightness level at different refresh rates, the final number of display brightness values ​​obtained is the product of the number of brightness levels and the number of refresh rates.

[0132] Please refer to Figure 8 As an optional embodiment, the above-described S510 may include:

[0133] S610, when at least part of the display panel displays images corresponding to the first binding point grayscale at different refresh rates and different brightness levels, obtain the luminous brightness corresponding to the first binding point grayscale at different refresh rates and / or different brightness levels of the at least part of the display panel respectively.

[0134] S620 determines the display brightness value corresponding to the first grayscale of each binding point at each brightness level and each refresh rate based on the luminous brightness of each display panel.

[0135] In this embodiment, the compensation parameter generation device can drive a portion of the display panels to display images and determine the corresponding display brightness value based on the luminance of that portion of the display panels. After determining the display brightness value and generating the compensation parameters, the compensation parameters can be stored in that portion of the display panels and other display panels in the same batch, thereby realizing the generation of compensation parameters for the same batch of display panels.

[0136] In S610, during the production testing of display panels, a subset of display panels can be selected from multiple display panels, and the display brightness value shared by multiple display panels can be determined based on the display brightness value of the subset of display panels when displaying images.

[0137] To ensure the accuracy of the display brightness values ​​obtained from a subset of display panels, multiple display panels can be manufactured from the same batch. After selecting a subset of display panels from the multiple panels, each subset can be driven to display images corresponding to the first bound point grayscale at different brightness levels under different refresh rates, and the luminous brightness of each display panel under each image can be obtained through optical devices.

[0138] In the S620, taking a single refresh rate as an example, after selecting a subset of display panels, such as 30 display panels, each display panel can be driven to display the image corresponding to the first bound-point grayscale of a certain brightness level at that refresh rate, and the luminance of each display panel can be acquired. Based on the 30 luminance values ​​corresponding to the 30 display panels, the corresponding display brightness value can be determined. For example, the average of the 30 luminance values ​​can be used as the display brightness value, or other brightness value calculation formulas can be used to determine the display brightness value based on the 30 luminance values. This display brightness value can then be used as the display brightness value corresponding to the first bound-point grayscale of a certain brightness level at that refresh rate.

[0139] After determining the display brightness value corresponding to a certain brightness level, the compensation parameter generation device can drive each display panel to display the image corresponding to the first bound point grayscale of the next brightness level, and continue to determine the display brightness value corresponding to the next brightness level according to the luminous brightness of each display panel, until the display brightness value corresponding to each brightness level at the current refresh rate is determined.

[0140] Similarly, after determining the display brightness values ​​corresponding to each brightness level at a certain refresh rate, the compensation parameter generation device can drive the display panel to display the image corresponding to the first bound point grayscale of each brightness level at the next refresh rate, thereby obtaining the display brightness values ​​corresponding to each brightness level at the next refresh rate, until the display brightness values ​​corresponding to the first bound point grayscale of each brightness level at each refresh rate are obtained.

[0141] In S520, after obtaining the display brightness value corresponding to each brightness level under the two refresh rates, the compensation parameters corresponding to each brightness level under the two refresh rates can be determined.

[0142] When there are three or more refresh rates, the compensation parameters corresponding to each brightness level under each different refresh rate switching mode can be determined.

[0143] In one exemplary embodiment, the compensation parameter generation device can obtain the display brightness values ​​corresponding to the first bound point grayscale of each brightness level of the display panel at 1Hz, 60Hz, and 120Hz. Taking the refresh rate switching mode from 120Hz to 1Hz as an example, when determining the compensation parameters corresponding to the HBM brightness level, the compensation parameter generation device can determine the compensation parameters corresponding to the HBM brightness level based on the display brightness values ​​corresponding to the HBM brightness level at 120Hz and 1Hz.

[0144] In one exemplary implementation, the compensation parameters in the above embodiments can be obtained using the following calculation formula:

[0145] N HBM =△L / (L2)=|L1-L2| / (L2);

[0146] Where L1 is the display brightness value corresponding to the first bound point grayscale at 120Hz and HBM brightness level; L2 is the display brightness value corresponding to the first bound point grayscale at 1Hz and HBM brightness level.

[0147] The compensation generation device can calculate the compensation parameters corresponding to each brightness level when switching from 120Hz to 1Hz based on the display brightness values ​​corresponding to other brightness levels at 120Hz and other brightness levels at 1Hz.

[0148] Similarly, the compensation generation device can also determine the compensation parameters corresponding to each brightness level under refresh rate switching modes such as switching from 120Hz to 60Hz, from 60Hz to 1Hz, from 1Hz to 120Hz, from 1Hz to 60Hz, and from 60Hz to 120Hz. That is, when the display panel supports three or more refresh rates, the compensation generation device can determine the compensation parameters corresponding to each brightness level under different refresh rate switching modes.

[0149] Please refer to Figure 9 As an optional embodiment, the above-described S520 may include:

[0150] S710 determines the brightness difference between at least two refresh rates at the first binding point grayscale based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level.

[0151] S720 determines the compensation parameters corresponding to different refresh rate switching methods at each brightness level based on the brightness difference and the display brightness value corresponding to each refresh rate.

[0152] In this embodiment, the compensation parameter generation device can determine the compensation parameters corresponding to the switching from one refresh frequency to another at a certain brightness level based on the brightness difference between the two refresh frequencies at that brightness level. After determining the compensation parameters corresponding to each brightness level under different refresh frequency switching methods, the compensation parameters can be stored in the display panel so that the display panel can perform brightness compensation through the corresponding compensation parameters under different refresh frequency switching methods.

[0153] In S710, after determining the display brightness values ​​corresponding to each brightness level at at least two different refresh frequencies, the compensation parameter generation device can determine two refresh frequencies from a plurality of refresh frequencies and determine the brightness difference of the first bound point grayscale at a certain brightness level between the two refresh frequencies. For example, the compensation parameter generation device can determine the display brightness value of the first bound point grayscale at 120Hz and 1Hz at the first bound point grayscale at the Normal1 brightness level, and determine the brightness difference of the first bound point grayscale at the Normal1 brightness level when switching from 120Hz to 1Hz based on the difference between the two display brightness values.

[0154] In S720, after determining the brightness difference of the first bound point grayscale at Normal1 brightness level when switching from 120Hz to 1Hz, the corresponding compensation parameters when switching from 1Hz to 120Hz can be determined based on the display brightness value of the first bound point grayscale at 120Hz; and the corresponding compensation parameters when switching from 120Hz to 1Hz can be determined based on the display brightness value of the first bound point grayscale at 1Hz.

[0155] Taking a refresh rate switching mode from 120Hz to 1Hz as an example, the ratio of the brightness difference before and after the switch to the display brightness value at the second refresh rate after the switch is the required brightness compensation range after the switch. Therefore, when performing brightness compensation for the second refresh rate, the compensation parameters can be determined based on the brightness difference before and after the switch and the display brightness value after the switch. Thus, when switching from 120Hz to 1Hz at Normal1 brightness level, the corresponding compensation parameters for switching from 120Hz to 1Hz can be determined based on the display brightness value of the first grayscale at 1Hz and the brightness difference between 120Hz and 1Hz at Normal1 brightness level.

[0156] Based on the display brightness value of 1Hz at other brightness levels and the brightness difference between 120Hz and 1Hz, the corresponding compensation parameters when switching from 120Hz to 1Hz at other brightness levels can be determined.

[0157] Similarly, the above implementation method can also be used to determine the compensation parameters corresponding to each brightness level under other refresh rate switching methods. For example, the compensation parameters corresponding to each brightness level when switching from 120Hz to 60Hz can be determined, which will not be elaborated here.

[0158] In S530, after determining the compensation parameters corresponding to each brightness level under different refresh rate switching modes, the compensation parameter generating device can store the compensation parameters in the display panel so that the display panel can implement the brightness compensation method of the display panel in the above embodiment according to the compensation parameters.

[0159] It should be noted that after the compensation parameter generation device displays an image on the drive panel and obtains the compensation parameters corresponding to each brightness level under different refresh rate switching modes, it can store the compensation parameters in the display panels of the same batch. At this point, the display panels of the same batch can achieve brightness compensation during refresh rate switching based on the compensation parameters stored in the storage module during normal display.

[0160] The compensation parameter generation device can also store compensation parameters to the display panel by storing multiple brightness levels and their corresponding compensation parameters. A single brightness level and its corresponding compensation parameter can include multiple compensation parameters. These multiple compensation parameters can be the compensation parameters corresponding to each brightness level under a refresh rate switching mode. For example, when switching from 120Hz to 1Hz, they could be the compensation parameters corresponding to HDR, HBM, Normal1, Normal2, Normal3, Normal4, Normal5, Normal6, and Normal7 respectively. This brightness level and compensation parameter correspondence can be a brightness level and compensation parameter correspondence table. Figure 10 As shown, Figure 10 The table shows the correspondence between brightness levels and compensation parameters when switching refresh rates from 120Hz to 1Hz. After the display panel determines that the refresh rate switching mode is from 120Hz to 1Hz, it can determine the compensation parameters corresponding to the current brightness level from the table.

[0161] The display panel can also store multiple tables mapping brightness levels to compensation parameters. Each table corresponds to the compensation parameters for each brightness level under a specific refresh rate switching mode. If the display panel determines that the refresh rate switching mode is from 60Hz to 1Hz, the compensation parameters can be obtained from the table mapping 60Hz to 1Hz.

[0162] Please refer to Figures 11 to 12 ,exist Figure 11 and Figure 12 In the diagram, the horizontal axis represents the time points for brightness detection during image display, and the vertical axis represents the brightness difference between the current time point and the previous time point. Figure 11 The diagram illustrates the brightness difference between each light-emitting frame in an implementation where the proportion of light emission time is not adjusted after the refresh rate is switched. Figure 12 This shows the brightness difference between each emission frame after adjusting the emission time percentage at the second refresh rate. According to... Figure 11 and Figure 12 It is certain that when no brightness compensation is performed during refresh rate switching, there is a significant brightness difference between the first frame image after the switch and the frame image before the switch. However, when the proportion of the emission time of the refresh rate after the switch is adjusted during refresh rate switching, the brightness difference between the first frame image after the switch and the frame image before the switch decreases. Therefore, by adjusting the proportion of the emission time of the refresh rate after the switch, the brightness difference between the frame images before and after the switch can be reduced, thereby improving the flickering phenomenon during refresh rate switching.

[0163] This application embodiment also provides a brightness compensation device for a display panel, such as... Figure 13 As shown, the device includes:

[0164] The parameter determination module 1301 is used to respond to the frequency switching command and determine the corresponding compensation parameters according to the current brightness level, the first refresh frequency, and the second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch.

[0165] The brightness compensation module 1302 is used to adjust the proportion of light emission time at the second refresh frequency according to the compensation parameters.

[0166] As one implementation of this application, the parameter determination module 1301 may include:

[0167] The compensation relationship determination unit is used to respond to a frequency switching command and, based on a first refresh frequency and a second refresh frequency, determine a brightness level and compensation parameter correspondence that matches the switching from the first refresh frequency to the second refresh frequency from multiple brightness level and compensation parameter correspondences; the multiple brightness level and compensation parameter correspondences correspond to different refresh frequencies before the switching and / or different refresh frequencies after the switching.

[0168] The compensation parameter determination unit is used to determine the compensation parameter corresponding to the current brightness level from the matched brightness level and compensation parameter correspondence.

[0169] As one implementation of this application, the brightness compensation module 1302 described above may include:

[0170] The light emission ratio acquisition unit is used to acquire the original light emission time ratio corresponding to the second refresh frequency;

[0171] The emission ratio determination unit is used to determine the target emission time ratio based on the compensation parameters and the original emission time ratio.

[0172] As one implementation of this application, the brightness compensation module 1302 may further include:

[0173] The light emission control signal unit is used to generate a light emission control signal based on the target light emission time ratio, starting from the first frame after the refresh rate switch; the light emission control signal is used to selectively allow the light emission element to emit light.

[0174] Figure 14 A schematic diagram of the hardware structure of the brightness compensation device for the display panel provided in an embodiment of this application is shown.

[0175] The brightness compensation device for the display panel may include a processor 1401 and a memory 1402 storing computer program instructions.

[0176] Specifically, the processor 1401 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0177] Memory 1402 may include mass storage for data or instructions. For example, and not limitingly, memory 1402 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where suitable, memory 1402 may include removable or non-removable (or fixed) media. Where suitable, memory 1402 may be internal or external to a brightness compensation device for a display panel. In a particular embodiment, memory 1402 is a non-volatile solid-state memory.

[0178] In a particular embodiment, memory 1402 may include read-only memory (ROM), random access memory (RAM), disk storage media device, optical storage media device, flash memory device, electrical, optical, or other physical / tangible memory storage device. Therefore, typically, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform operations described with reference to the method according to one aspect of this disclosure. Processor 1401 implements any of the brightness compensation methods for a display panel in the above embodiments by reading and executing computer program instructions stored in memory 1402.

[0179] In one example, the brightness compensation device for the display panel may further include a communication interface 1403 and a bus 1410. For example, Figure 14 As shown, the processor 1401, memory 1402, and communication interface 1403 are connected through bus 1410 and complete communication with each other.

[0180] Communication interface 1403 is primarily used to enable communication between modules, devices, units, and / or equipment in the embodiments of this application. Bus 1410 includes hardware, software, or both, coupling components of the brightness compensation device of the display panel together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 1410 may include one or more buses. Although specific buses are described and shown in the embodiments of this application, this application contemplates any suitable bus or interconnect.

[0181] Furthermore, in conjunction with the brightness compensation method for the display panel in the above embodiments, this application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the brightness compensation methods for the display panel in the above embodiments.

[0182] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0183] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0184] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0185] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0186] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A brightness compensation method for a display panel, characterized in that, The method includes: In response to a frequency switching command, the corresponding compensation parameters are determined based on the current brightness level, the first refresh frequency, and the second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch. Adjust the proportion of light emission time at the second refresh frequency according to the compensation parameters; The method of responding to a frequency switching command by determining corresponding compensation parameters based on the current brightness level, the first refresh rate, and the second refresh rate includes: In response to a frequency switching command, based on the first refresh frequency and the second refresh frequency, a brightness level and compensation parameter correspondence that matches the switching from the first refresh frequency to the second refresh frequency is determined from a plurality of brightness level and compensation parameter correspondences; the refresh frequencies before the switching correspond to the plurality of brightness level and compensation parameter correspondences are different, and / or the refresh frequencies after the switching correspond to the plurality of brightness level and compensation parameter correspondences are different. Determine the compensation parameter corresponding to the current brightness level from the matched correspondence between brightness levels and compensation parameters; The step of adjusting the proportion of light emission time at the second refresh frequency according to the compensation parameter includes: Obtain the original emission time percentage corresponding to the second refresh frequency; The target emission time percentage is determined based on the compensation parameters and the original emission time percentage.

2. The brightness compensation method for a display panel according to claim 1, characterized in that, The grayscale values ​​of the binding points corresponding to multiple brightness levels and compensation parameters are all the same grayscale value of the binding point.

3. The brightness compensation method for a display panel according to claim 2, characterized in that, The grayscale values ​​corresponding to the binding points of multiple brightness levels and compensation parameters are all the maximum binding point grayscale values.

4. The brightness compensation method for a display panel according to claim 1, characterized in that, The target emission time percentage EM2 = EM1 * (1 + Ni); Wherein, EM1 is the original emission time percentage, EM2 is the target emission time percentage, and Ni or 1+Ni is the compensation parameter.

5. The brightness compensation method for a display panel according to claim 1, characterized in that, After adjusting the proportion of light emission time at the second refresh frequency according to the compensation parameter, the method further includes: Starting from the first frame after the refresh rate switch, a light emission control signal is generated based on the target light emission time ratio; the light emission control signal is used to selectively allow the light emission element to emit light.

6. A method for generating compensation parameters, characterized in that, The method includes: When the display panel displays an image corresponding to the grayscale of the first bound point at at least two refresh rates and at least two brightness levels, the display brightness value corresponding to the grayscale of the first bound point is obtained respectively. Based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level, determine the compensation parameters corresponding to different refresh rate switching methods at each brightness level. The compensation parameters are stored in the display panel; the display panel is used to implement the brightness compensation method of the display panel as described in any one of claims 1-5 according to the compensation parameters.

7. The compensation parameter generation method according to claim 6, characterized in that, When the display panel displays an image corresponding to the first bound point grayscale at at least two refresh rates and at least two brightness levels, the display brightness values ​​corresponding to the first bound point grayscale are obtained, including: When at least some display panels display images corresponding to the first binding point grayscale at different refresh rates and different brightness levels, obtain the luminous brightness corresponding to the first binding point grayscale at different refresh rates and / or different brightness levels of at least some display panels. Based on the luminance of each display panel, determine the display brightness value corresponding to the first grayscale of each brightness level and each refresh rate.

8. The compensation parameter generation method according to claim 6, characterized in that, The step of determining compensation parameters for different refresh rate switching methods at each brightness level based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level includes: Based on the display brightness values ​​corresponding to at least two refresh rates at each brightness level, determine the brightness difference between at least two refresh rates at the first binding point grayscale. Based on the brightness difference and the display brightness value corresponding to each refresh rate, the compensation parameters corresponding to different refresh rate switching methods under each brightness level are determined.

9. A brightness compensation device for a display panel, characterized in that, The device includes: The parameter determination module is used to respond to the frequency switching command and determine the corresponding compensation parameters based on the current brightness level, the first refresh frequency, and the second refresh frequency; the first refresh frequency is the refresh frequency before the switch, and the second refresh frequency is the refresh frequency after the switch. A brightness compensation module is used to adjust the proportion of light emission time at the second refresh frequency according to the compensation parameters; The parameter determination module includes: The compensation relationship determination unit is used to respond to a frequency switching command and, based on a first refresh frequency and a second refresh frequency, determine a brightness level and compensation parameter correspondence that matches the switching from the first refresh frequency to the second refresh frequency from multiple brightness level and compensation parameter correspondences; the multiple brightness level and compensation parameter correspondences correspond to different refresh frequencies before the switching and / or different refresh frequencies after the switching. The compensation parameter determination unit is used to determine the compensation parameter corresponding to the current brightness level from the matched brightness level and compensation parameter correspondence. The brightness compensation module includes: The light emission ratio acquisition unit is used to acquire the original light emission time ratio corresponding to the second refresh frequency; The emission ratio determination unit is used to determine the target emission time ratio based on the compensation parameters and the original emission time ratio.

10. A brightness compensation device for a display panel, characterized in that, The brightness compensation device for the display panel includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, it implements the brightness compensation method for the display panel as described in any one of claims 1-5 or the compensation parameter generation method as described in any one of claims 6-8.

11. A computer storage medium, characterized in that, The computer storage medium stores computer program instructions, which, when executed by a processor, implement the brightness compensation method for the display panel as described in any one of claims 1-5 or the compensation parameter generation method as described in any one of claims 6-8.

Images