Display device and display correction method for display device

Abstract

The application provides a display device and a display correction method of the display device. The display device comprises a core, a power management module and a display panel which are electrically connected in sequence. The core is used for obtaining a first frame rate of a signal source in a first time period and a second frame rate of the signal source in a second time period. The first time period is earlier than the second time period. The signal source comprises multiple frames of images. If the first frame rate and the second frame rate are not matched, a blanking time period corresponding to the second frame rate and multiple target gamma voltage values of the brightness of multiple pixel units on each frame of image are determined, and the blanking time period and the multiple target gamma voltage values are transmitted to the power management module. The power management module is used for driving the display panel according to the multiple target gamma voltage values in the blanking time period, so as to maintain the brightness of the display panel. The display device can maintain the brightness of the displayed picture and avoid the phenomenon of flickering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device and a display correction method of the display device. BACKGROUND

[0002] In the working process, the display device usually displays images with constant refresh rate. If the frame rate of the rendering of the signal source provided by the image processing unit (CPU) or main processor to the display device is different from the refresh rate of the display device, the screen tearing phenomenon will occur. To solve this problem, the prior art proposes a display device with variable refresh rate (VRR). In the VRR mode, the display device can freely switch between high refresh rate and low refresh rate without causing screen tearing phenomenon.

[0003] However, when the display device switches from high refresh rate to low refresh rate or from low refresh rate to high refresh rate through the VRR mode, the low refresh rate has a longer field blanking time period (also called blank time period) than the high refresh rate, that is, the time for the display device to maintain the image under low refresh rate is longer than that under high refresh rate, and the leakage time of the thin film transistor of the display device is increased, resulting in a decrease in the brightness of the display device. Similarly, when switching from low refresh rate to high refresh rate, the brightness of the display device increases. If the frequency switching is fast, the user may feel that the display panel flickers. SUMMARY

[0004] The embodiments of the present application provide a display device and a display correction method of the display device, which can maintain the brightness of the displayed image and avoid flickering phenomenon.

[0005] The embodiments of the present application provide a display device, which comprises a core, a power management module and a display panel connected in sequence; the core is configured to obtain a first frame rate of a signal source in a first time period and a second frame rate of the signal source in a second time period, the first time period is earlier than the second time period, and the signal source comprises multiple images; if the first frame rate and the second frame rate are not matched, the second frame rate corresponding blanking time period and multiple target gamma voltage values of the brightness of multiple pixel units on each frame of the image are calculated, and the blanking time period and the multiple target gamma voltage values are transmitted to the power management module; the power management module is configured to drive the display panel according to the multiple target gamma voltage values in the blanking time period, so as to maintain the brightness of the display panel.

[0006] In some embodiments, the core is further configured to obtain a first average image level value of a plurality of pixel units on each frame of the image in the first time period and a second average image level value of the plurality of pixel units on each frame of the image in the second time period; calculate an absolute value of a first difference value between the first average image level value and the second average image level value; and obtain the plurality of target gamma voltage values according to the absolute values of the first difference values.

[0007] In some embodiments, the core is further configured to obtain a first average image level value of a plurality of pixel units on each frame of the image in the first time period and a second average image level value of the plurality of pixel units on each frame of the image in the second time period; calculate a target average image level value of the first average image level value and the second average image level value; calculate an absolute value of a second difference value between the target average image level value and the corresponding first average image level value; and obtain the plurality of target gamma voltage values according to the absolute values of the second difference values.

[0008] In some embodiments, the core is configured to obtain the first frame rate corresponding to the nth frame and the second frame rate corresponding to the (n+1)th frame of the signal source, where n is a positive integer.

[0009] In some embodiments, the power management module includes a plurality of registers, each of which is configured to obtain a driving voltage according to one of the target gamma voltage values and input the driving voltage to the display panel in the blanking time period to display an image.

[0010] Embodiments of the present application also provide a display correction method of a display device, comprising:

[0011] obtaining a first frame rate of a signal source in a first time period;

[0012] obtaining a second frame rate of the signal source in a second time period, the first time period being earlier than the second time period, and the signal source including a plurality of images;

[0013] if the first frame rate does not match the second frame rate, calculating a blanking time period corresponding to the second frame rate and a plurality of target gamma voltage values according to brightness of a plurality of pixel units on each frame of the image;

[0014] displaying an image according to the plurality of target gamma voltage values in the blanking time period.

[0015] In some embodiments, the plurality of target gamma voltage values are determined according to brightness of a plurality of pixel units on each frame of the image, comprising:

[0016] acquire a first average image level value of a plurality of pixel units on each frame of the image in a first time period and a second average image level value of the plurality of pixel units on each frame of the image in a second time period;

[0017] calculate an absolute value of a first difference value of the first average image level value and the second average image level value;

[0018] acquire a first average image level value of a plurality of pixel units on each frame of the image in a first time period and a second average image level value of the plurality of pixel units on each frame of the image in a second time period;

[0019] In some embodiments, the acquiring the first average image level value of the plurality of pixel units on each frame of the image in the first time period and the second average image level value of the plurality of pixel units on each frame of the image in the second time period, and the determining the plurality of target gamma voltage values according to the brightness of the plurality of pixel units on each frame of the image comprises: calculating a target average image level value of the first average image level value and the second average image level value; calculating an absolute value of a second difference value of the plurality of target average image level values and corresponding first average image level values; and obtaining the plurality of target gamma voltage values according to the absolute value of the plurality of second difference values.

[0020] In some embodiments, the acquiring the first frame rate of the signal source in a first time period and the second frame rate of the signal source in a second time period, the first time period being earlier than the second time period, comprises: acquiring the first frame rate corresponding to an n th frame and the second frame rate corresponding to an n+1 th frame of the signal source; wherein n is a positive integer.

[0021] In some embodiments, the displaying the image according to the target gamma voltage value in the blanking time period comprises: determining a plurality of driving voltages according to the target gamma voltage value, and inputting the driving voltages to the display device to display the image in the blanking time period.

[0022] The display device provided by the embodiments of the present application comprises a core, a power management module and a display panel which are electrically connected in sequence. The display device is connected with an image processing unit or a main processor, and the image processing unit or the main processor provides a signal source for the display device, and the signal source comprises a plurality of images. The core can detect the change of the frame rate of the signal source, and when the frame rate of the signal source changes, a blanking time period after the change of the frame rate and the brightness of a plurality of pixel units on each frame of image are calculated to determine a plurality of target gamma voltage values, and the display panel is driven according to the plurality of target gamma voltage values in the blanking time period, so as to maintain the brightness of the displayed image and avoid the phenomenon of flickering. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings are within the scope of protection of the present application.

[0024] Figure 1 The first structural schematic diagram of the display device provided by the embodiments of the present application.

[0025] Figure 2 The second structural schematic diagram of the display device provided by the embodiments of the present application.

[0026] Figure 3 The flowchart of the display correction method of the display device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0028] In the working process of the display device, a constant refresh rate is usually used to display images. If the frame rate of the rendering of the signal source provided by the image processing unit (CPU) or the main processor to the display device is different from the refresh rate of the display device, the screen tearing phenomenon will occur. To this end, the prior art proposes a display device with a variable refresh frequency (VRR). In the VRR mode, the display device can freely switch between high refresh frequency and low refresh frequency without generating the screen tearing phenomenon.

[0029] However, when the display device switches from high refresh rate to low refresh rate or from low refresh rate to high refresh rate through the VRR mode, the low refresh rate has a longer field blanking time period (also called blank time period) than the high refresh rate, that is, the time for maintaining the image of the display device is prolonged at the low refresh rate compared with the high refresh rate, the leakage time of the thin film transistor of the display device is increased, and the brightness of the display device is reduced. Similarly, when switching from low refresh rate to high refresh rate, the brightness of the display device is increased. If the frequency switching is fast, the user may feel that the display panel flickers.

[0030] Therefore, the embodiments of the present application provide a display device and a display correction method of the display device, which can maintain the brightness of the displayed image and avoid the flickering phenomenon. The specific description will be made below with reference to the drawings.

[0031] Referring to Figure 1 and Figure 2 , Figure 1 A first structural schematic diagram of a display device provided by an embodiment of the present application, Figure 2 A second structural schematic diagram of a display device provided by an embodiment of the present application.

[0032] The present application provides a display device 100, which comprises a system on chip (SOC) 110, a power management module (PMIC) 120 and a display panel 130 connected in sequence. The SOC 110 is configured to obtain a first frame rate of a signal source in a first time period and a second frame rate of the signal source in a second time period, the first time period being earlier than the second time period, and the signal source comprising multiple frames of images. If the first frame rate and the second frame rate are not matched, a blanking time period corresponding to the second frame rate is calculated, a plurality of target gamma voltage values are determined according to the brightness of a plurality of pixel units on each frame of image, and the blanking time period and the plurality of target gamma voltage values are transmitted to the PMIC 120. The PMIC 120 is configured to drive the display panel 130 according to the plurality of target gamma voltage values in the blanking time period, so as to maintain the brightness of the display panel 130. In some cases, the first frame rate and the second frame rate are not equal means that the first frame rate and the second frame rate are not equal.

[0033] The first time period and the second time period are not coincident. The first time period is earlier than the second time period. For example, in a time period of 0-10 seconds, the first time period is 0-2 seconds and the second time period is 4-6 seconds. For another example, the first time period is 0-1 second and the second time period is 1-2 seconds. It can be understood that the first time period and the second time period can be continuous or not. Thus, the SOC 110 can monitor the frame rate of the signal source in real time or at intervals of the same time, for example, once every 2 seconds. It can be understood that, when the SOC 110 monitors the frame rate of the signal source at intervals of the same time, the energy consumption can be saved compared with monitoring the frame rate of the signal source in real time. When the SOC 110 monitors the frame rate of the signal source in real time, the change of the frame rate of the signal source is sensitive, and the accuracy of monitoring is improved.

[0034] The signal source can be provided by a signal device 200, such as an image processing unit (CPU) or a main processor. For example, a game console or other computer host provides a signal source to the display device 100. The signal source includes multiple frames of images, and the speed at which the multiple frames of images are generated determines the size of the frame rate, i.e., the frame rate is a property of the signal source. In actual applications, high frame rates are mainly used in gaming, desktop sliding, photo browsing, and other scenarios, and low frame rates are mainly used in static display, low-speed sliding, and low-frame-rate video playback scenarios. The image processing unit (CPU) or the main processor can be connected to the display device 100 through a high-definition multimedia interface (HDMI).

[0035] The power management module 120 is configured to input a driving voltage to the display panel 130. The power management module 120 can be connected to the display panel 130 through the power management module 120.

[0036] In the VRR mode, the frame rate of the signal source corresponds to the refresh rate of the display device 100. That is, when the frame rate of the signal source changes, the refresh rate of the display device 100 also changes accordingly. In some cases, the frame rate of the signal source is not less than the refresh rate of the display device 100. When the frame rate of the signal source increases, the refresh rate of the display device 100 also increases accordingly. When the frame rate of the signal source decreases, the refresh rate of the display device 100 also decreases accordingly.

[0037] In the refresh process of the display device 100, each frame of image includes a charging time period and a blanking time period, and the blanking time period refers to a field blanking time period. When the charging time period is the same, the refresh rate of the display device 100 decreases, and the blanking time period increases, i.e., the leakage time period increases, thereby reducing the brightness of the display panel 130. In this regard, the core 110 detects the brightness of a plurality of pixel units on the image before and after the change of the frame rate of the signal source, obtains a plurality of target gamma voltage values, and then sends the target gamma voltage values to the power management module 120. The power management module 120 drives the display panel 130 according to the target gamma voltage values. For example, when the first frame rate is less than the second frame rate, the first brightness of the plurality of pixel units corresponding to the first frame rate is less than the first brightness of the plurality of pixel units corresponding to the second frame rate, and the core 110 determines a plurality of target gamma voltage values according to the first brightness and the second brightness, so that the power management module 120 charges the display panel 130 in the blanking area according to the plurality of target gamma voltage values, to compensate for the problem of excessively low voltage of the display panel 130 due to long-time leakage, to maintain the brightness of the display panel 130 and avoid flickering.

[0038] The display device 100 provided by the embodiment of the present application comprises a core 110, a power management module 120 and a display panel 130 which are electrically connected in sequence. The display device 100 is connected with an image processing unit or a main processor, and the image processing unit or the main processor provides a signal source for the display device 100, and the signal source comprises multiple frames of images. The core 110 can detect the change of the frame rate of the signal source. When the frame rate of the signal source changes, the core 110 calculates the blanking time period after the change of the frame rate and the luminance of multiple pixel units on each frame of image to determine multiple target gamma voltage values, and drives the display panel 130 according to the multiple target gamma voltage values in the blanking time period, so as to maintain the luminance of the displayed image and avoid the flickering phenomenon.

[0039] In some embodiments, the core 110 is further configured to obtain multiple first average image level values of multiple pixel units on each frame of image in a second time period and multiple second average image level values of the multiple pixel units on each frame of image in the second time period, the multiple first average image level values correspond to the multiple second average image level values one by one; calculate multiple first difference values of the multiple first average image level values and the corresponding second average image level values; and calculate the target gamma voltage value according to the multiple first difference values.

[0040] It can be understood that the average image level (APL) is positively correlated with the luminance. The greater the average image level is, the greater the luminance is; the smaller the average image level is, the smaller the luminance is. The frame rate of the signal source is positively correlated with the refresh rate of the display device 100, and the refresh rate of the display device 100 is positively correlated with the luminance of the display panel 130. The core 110 obtains the multiple target gamma voltage values through the first difference values of the multiple first average image level values and the multiple second average image level values, and drives the display panel 130 according to the target gamma voltage values in the blanking time period, so as to compensate for the voltage drop caused by the leakage of the display panel 130 in the blanking time period.

[0041] In this process, during the transition between the first and second frame rates, each grayscale level of multiple pixel units corresponds to a first average image level value and a second average image level value. That is, each grayscale level corresponds to the absolute value of a first difference, and a third brightness can be obtained from the absolute value of each first difference. The mechanism 110 obtains a fitted third brightness-grayscale curve based on the correspondence between multiple third brightness levels and multiple grayscale levels. A small number of feature-binding grayscale levels are selected as target grayscale levels on the third brightness-grayscale curve. For example, for an 8-bit color depth (grayscale from 0 to 256) display panel 130, 14 feature-binding grayscale levels can be selected as target grayscale levels. Each target grayscale level corresponds to a third brightness. After obtaining the 14 feature-binding grayscale levels and the 14 third brightness levels corresponding to them, the mechanism 110 corrects the 14 third brightness levels according to the reference gamma curve to transform them into corresponding 14 fourth brightness levels. Then, 14 target gamma voltage values ​​are obtained from the 14 fourth brightness levels. The target grayscale value can be 225+, 225-, 254+, 254-, 223+, 223-, 127+, 127-, 31+, 31-, 1+, and 1-. For example, the reference gamma curve can be a 2.2 gamma curve.

[0042] In some scenarios, when the first frame rate is greater than the second frame rate, the mechanism 110 acquires the first average image level value of multiple pixel units in each frame of the image within the second time period and the second average image level value of multiple pixel units in each frame of the image within the second time period; calculates the absolute value of multiple first differences between the multiple first average image level values ​​and the corresponding second average image level values; and calculates 14 target gamma voltage values ​​based on the absolute values ​​of the multiple first differences. The mechanism 110 then transmits the 14 target gamma voltage values ​​to the power management module 120. The power management module 120 drives the display panel 130 according to the 14 target gamma voltage values ​​during the blanking time period to compensate for the reduced brightness of the display panel 130 and the flickering phenomenon caused by the longer leakage time.

[0043] In some embodiments, as shown in formula (1), the mechanism 110 obtains the target average image level value A through the first average image level value A1 and the second average image level value A2. n Then calculate the target average image level value A. n The absolute value of the second difference between the first average image level value A1 and the second average image level value A1; the target gamma voltage value is calculated based on the absolute values ​​of multiple second differences. Optionally, the mechanism 110 can acquire a first coefficient k1 and a second coefficient k2 to obtain the target average image level value A1. n Then, the weights of the first average image level value A1 and the second average image level value A2 are determined.

[0044] A n = k1 x A1 + k2 x A2 (1)

[0045] wherein, A n is a target average image level value; A1 is a first average image level value; A2 is a second average image level value; k1 is a first coefficient; k2 is a second coefficient; k1 + k2 = 1.

[0046] In some cases, the first coefficient is 0.2, and the second coefficient is 0.8. It can be understood that the target average image level value is mainly determined by the second average image level value, that is, the target average image level value is the second average image level value, and the target gamma voltage value is obtained according to the absolute value of the second difference between the target average image level value and the first average image level value. Relatively speaking, the display panel 130 is driven according to the target gamma voltage value in the blanking time period to compensate for the voltage drop caused by the leakage of the display panel 130 in the blanking time period. Since the target gamma voltage value obtained according to the absolute value of the second difference between the target average image level value and the first average image level value is small, the brightness of the display panel 130 in the blanking time period is between the brightness in the charging time period corresponding to the first frame rate and the brightness in the charging time period corresponding to the second frame rate, so that the brightness changes more gently.

[0047] In other cases, the first coefficient is 0.5, and the second coefficient is 0.5. The movement 110 is also used to calculate a target average image level value of the first average image level value and the second average image level value; calculate the absolute value of the second difference between the target average image level value and the first average image level value; and obtain a target gamma voltage value according to a plurality of absolute values of the second difference. For example, the average image level value at the first frame rate is 50%, corresponding to the brightness of the display panel 130 being 5mit, and the average image level value at the second frame rate is 70%, corresponding to the brightness of the display panel 130 being 11mit. The target average image level value obtained by the above formula (1) is 60%, corresponding to the target brightness of the display panel 130 being 8mit, and the absolute value of the second difference between the target average image level value and the first average image level value is 20%, corresponding to the target brightness of the display panel 130 being 2mit, that is, the display panel 130 needs to be charged with a gamma voltage value corresponding to the absolute value of the second difference between the target average image level value and the first average image level value in the blanking time period to compensate for the display panel 130 in the blanking time period.

[0048] In some embodiments, the core 110 is configured to obtain the first frame rate corresponding to the nth frame of the signal source and the second frame rate corresponding to the (n+1)th frame, where n is a positive integer. It can be understood that the core 110 can obtain the frame rate of each frame of the signal source without interruption, so as to achieve the effect of real-time monitoring.

[0049] In some embodiments, the power management module 120 includes a plurality of registers configured to obtain a plurality of driving voltages according to a target gamma voltage value, and input the plurality of driving voltages to the display panel 130 in the blanking time period to display the image.

[0050] In some embodiments, the core 110 inputs a target gamma voltage value to each register. Each register obtains a plurality of driving voltages according to the target gamma voltage value, and inputs the plurality of driving voltages to the display panel 130 in the blanking time period to display the image.

[0051] Please refer to Figure 3 , Figure 3 The flowchart of the display correction method of the display device provided in the embodiments of the present application is shown.

[0052] The present application also provides a display correction method of a display device, which includes:

[0053] S1, obtaining a first frame rate of a signal source in a first time period;

[0054] S2, obtaining a second frame rate of the signal source in a second time period, the first time period being earlier than the second time period, the signal source including a plurality of frames of images, and the frame period corresponding to the second frame rate including a charging time period and a blanking time period;

[0055] S3, if the first frame rate and the second frame rate do not match, calculating the blanking time period corresponding to the second frame rate and determining a plurality of target gamma voltage values according to the brightness of a plurality of pixel units on each frame of image;

[0056] S4, displaying the image according to the plurality of target gamma voltage values in the blanking time period.

[0057] In some cases, the first frame rate and the second frame rate are not equal means that the first frame rate and the second frame rate are not equal.

[0058] The first time period and the second time period are not coincident. The first time period is earlier than the second time period. For example, in a time period of 0-10 seconds, the first time period is 0-2 seconds, and the second time period is 4-6 seconds. For another example, the first time period is 0-1 second, and the second time period is 1-2 seconds. It can be understood that the first time period and the second time period can be continuous time periods or can not be continuous time periods. Thus, the frame rate of the signal source can be monitored in real time or can be monitored in the same interval, for example, once every 2 seconds. It can be understood that, when the frame rate of the signal source is monitored in the same interval, energy consumption can be saved compared with monitoring the frame rate of the signal source in real time. When the frame rate of the signal source is monitored in real time, the change of the frame rate of the signal source is sensitive, and the accuracy of monitoring is improved.

[0059] The signal source can be provided by an image processing unit (CPU) or a host processor. For example, a game console or other computer host provides a signal source to a display device. The signal source includes multiple frames of images, and the speed at which the multiple frames of images are generated determines the frame rate, that is, the frame rate is a property of the signal source. In actual application, high frame rate is mainly applied in scenarios such as games, desktop sliding, album browsing, and the like, and low frame rate is mainly applied in scenarios such as static display, low-speed sliding, and low frame rate video playing.

[0060] In the VRR mode, the frame rate of the signal source corresponds to the refresh rate of the display device. That is, when the frame rate of the signal source changes, the refresh rate of the display device also changes correspondingly. In some cases, the frame rate of the signal source is not less than the refresh rate of the display device. When the frame rate of the signal source increases, the refresh rate of the display device also increases correspondingly. When the frame rate of the signal source decreases, the refresh rate of the display device also decreases correspondingly.

[0061] The display device includes a charging time period and a blanking time period in the refresh process, and the blanking time period refers to a field blanking time period. When the charging time period is the same, the refresh rate of the display device decreases, and the blanking time period increases, that is, the leakage time period increases, and thus the brightness of the display panel decreases. In this regard, the brightness of multiple pixel units on the image before and after the change of the frame rate of the signal source is detected to obtain multiple target gamma voltage values, and the display panel is driven according to the target gamma voltage values. For example, when a first frame rate is less than a second frame rate, a first brightness of multiple pixel units corresponding to the first frame rate is less than a first brightness of multiple pixel units corresponding to the second frame rate, and multiple target gamma voltage values are determined according to the first brightness and the second brightness, and the image is displayed according to the multiple target gamma voltage values, so as to maintain the brightness of the display device and avoid flickering.

[0062] In some embodiments, the step of determining the plurality of target gamma voltage values according to the brightness of the plurality of pixel units on each frame image comprises obtaining a first average picture level value of the plurality of pixel units on each frame image in a second time period and a second average picture level value of the plurality of pixel units on each frame image in the second time period, the plurality of first average picture level values corresponding to the plurality of second average picture level values one by one; calculating an absolute value of a first difference value of the plurality of first average picture level values and the corresponding second average picture level values; and calculating the plurality of target gamma voltage values according to the absolute values of the plurality of first difference values.

[0063] It can be understood that the average picture level (APL) is positively correlated with the brightness. The greater the average picture level is, the greater the brightness is; the smaller the average picture level is, the smaller the brightness is. The frame rate of the signal source is positively correlated with the refresh rate of the display device, and the refresh rate of the display device is positively correlated with the brightness. The plurality of target gamma voltage values are obtained by the absolute values of the first difference values of the first average picture level values of the plurality of pixel units and the second average picture level values of the plurality of pixel units, and the target gamma voltage values are used to drive in the blanking time period to compensate for the voltage drop caused by the leakage in the blanking time period.

[0064] In the transition process of the first frame rate and the second frame rate of the signal source, each gray scale of the pixel unit corresponds to a first average picture level value and a second average picture level value, respectively. That is, each gray scale corresponds to an absolute value of a first difference value, and a third brightness can be obtained by each absolute value of the first difference value. A fitted third brightness-gray scale curve is obtained by the corresponding relationship between the plurality of third brightnesses and the plurality of gray scales. A small number of feature binding point gray scales are selected as target gray scales on the third brightness-gray scale curve, for example, 14 feature binding point gray scales can be selected as target gray scales for 8-bit color depth (gray scale is 0 to 256). Each target gray scale corresponds to an absolute value of a first difference value, that is, each absolute value of the first difference value corresponds to a third brightness. After obtaining 14 feature binding point gray scales and 14 third brightnesses corresponding to the 14 feature binding point gray scales, the 14 third brightnesses are corrected according to the reference gamma curve to convert the 14 third brightnesses into corresponding 14 fourth brightnesses, and 14 target gamma voltage values are obtained by the 14 fourth brightnesses. The target gray scale values can be 225+, 225-, 254+, 254-, 223+, 223-, 127+, 127-, 31+, 31-, 1+, and 1-. For example, the reference gamma curve can be a 2.2 gamma curve.

[0065] In some scenarios, when the first frame rate is greater than the second frame rate, the first average image level value of each frame of the image on the plurality of pixel units in the second time period and the second average image level value of each frame of the image on the plurality of pixel units in the second time period are obtained; the absolute value of the plurality of first difference values of the plurality of first average image level values and the corresponding second average image level values is calculated; and the 14 target gamma voltage values are calculated according to the absolute value of the plurality of first difference values. The 14 target gamma voltage values are then transmitted to drive the display panel according to the 14 target gamma voltage values in the blanking time period, so as to compensate for the decrease in brightness caused by the increase in leakage time and the flicker phenomenon.

[0066] In some embodiments, the target average image level value is obtained by the first average image level value and the second average image level value, and the absolute value of the second difference value of the target average image level value and the first average image level value is calculated; and the target gamma voltage value is calculated according to the absolute value of the plurality of second difference values. Optionally, the first coefficient and the second coefficient can be obtained to determine the proportion of the first average image level value and the second average image level value when obtaining the target average image level value.

[0067] In some cases, it can be understood that the target average image level value is mainly determined by the second average image level value, that is, the target average image level value is the second average image level value, and the target gamma voltage value is obtained according to the absolute value of the second difference value of the target average image level value and the first average image level value. Relatively speaking, the display panel is driven according to the target gamma voltage value in the blanking time period to compensate for the voltage drop caused by the leakage of the display panel in the blanking time period. Since the target gamma voltage value obtained according to the absolute value of the second difference value of the target average image level value and the first average image level value is small, the brightness of the display panel in the blanking time period is between the brightness of the charging time period corresponding to the first frame rate and the brightness of the charging time period corresponding to the second frame rate, so that the brightness changes more smoothly.

[0068] In some other cases, the target average image level value is calculated based on the first average image level value and the second average image level value; the second difference value between the target average image level value and the first average image level value is calculated; and the target gamma voltage value is obtained based on the absolute value of the second difference value. For example, the average image level value at the first frame rate is 50%, corresponding to a brightness of 5 mit, and the average image level value at the second frame rate is 70%, corresponding to a brightness of 11 mit. The target average image level value is calculated to be 60%, corresponding to a target brightness of 8 mit, the second difference value between the target average image level value and the first average image level value is 20%, corresponding to a target brightness of 2 mit, and thus the gamma voltage value corresponding to the absolute value of the second difference value is charged in the blanking time period to compensate the brightness of the display image of the display device in the blanking time period.

[0069] The step of determining the target gamma voltage value based on the brightness of the plurality of pixel units in each frame image comprises: calculating a plurality of first average image level values and a target average image level value corresponding to a plurality of second average image level values; calculating the absolute value of the second difference value between the plurality of target average image level values and the corresponding first average image level values; and obtaining the plurality of target gamma voltage values based on the absolute value of the plurality of second difference values.

[0070] The step of obtaining the frame rate of the signal source in the first time period and the second time period, and the first time period being earlier than the second time period, comprises obtaining the first frame rate corresponding to the nth frame and the second frame rate corresponding to the n+1th frame of the signal source; wherein n is a positive integer. It can be understood that the frame rate of each frame image of the signal source can be obtained uninterruptedly to achieve the effect of real-time monitoring.

[0071] The step of displaying the image based on the target gamma voltage value in the blanking time period, and the step of displaying the image based on the target gamma voltage value in the blanking time period, comprises obtaining the driving voltage based on the target gamma voltage value, and inputting a plurality of driving voltages in the blanking time period to display the image. The target gamma voltage value is input to each register. Each register obtains the driving voltage based on the target gamma voltage value, so as to display the image based on the plurality of driving voltages in the blanking time period.

[0072] To this end, an embodiment of the present application provides a storage medium having a plurality of instructions stored therein, the instructions being capable of being loaded by a processor to execute the steps in any of the display correction methods of the display device provided by the embodiments of the present application. The instructions can execute the following steps:

[0073] For example, a first frame rate of the signal source in a first time period is obtained; a second frame rate of the signal source in a second time period is obtained, the first time period is earlier than the second time period, the signal source comprises a plurality of frames of images, a frame period corresponding to the second frame rate comprises a charging time period and a blanking time period; if the first frame rate does not match the second frame rate, a blanking time period corresponding to the second frame rate is calculated, and a plurality of target gamma voltage values are determined according to brightness of a plurality of pixel units on each frame of image; and the image is displayed according to the plurality of target gamma voltage values in the blanking time period.

[0074] For example, the step of determining the plurality of target gamma voltage values according to the brightness of the plurality of pixel units on each frame of image comprises obtaining a first average image level value of the plurality of pixel units on each frame of image in the second time period and a second average image level value of the plurality of pixel units on each frame of image in the second time period, the plurality of first average image level values correspond to the plurality of second average image level values one by one; an absolute value of a first difference value of the plurality of first average image level values and the corresponding second average image level values is calculated; and the plurality of target gamma voltage values are calculated according to the absolute value of the plurality of first difference values.

[0075] For example, the step of determining the plurality of target gamma voltage values according to the brightness of the plurality of pixel units on each frame of image comprises calculating a target average image level value of the plurality of first average image level values and the corresponding second average image level values; calculating an absolute value of a second difference value of the plurality of target average image level values and the corresponding first average image level values; and obtaining the plurality of target gamma voltage values according to the absolute value of the plurality of second difference values.

[0076] For example, the step of obtaining the frame rate of the signal source in the first time period and the second time period, the first time period being earlier than the second time period, comprises obtaining a first frame rate corresponding to an n-th frame and a second frame rate corresponding to an n+1-th frame; wherein n is a positive integer.

[0077] For example, the step of displaying the image according to the target gamma voltage value in the blanking time period comprises obtaining a driving voltage according to the target gamma voltage value, and displaying the image according to the driving voltage in the blanking time period.

[0078] The specific implementation of each operation can refer to the foregoing embodiments, which will not be described here again.

[0079] The storage medium can include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0080] Since the instructions stored in the storage medium can execute the steps in the display correction method of any one of the display devices provided in the embodiments of the present application, the beneficial effects that can be achieved by the display correction method of any one of the display devices provided in the embodiments of the present application can be achieved. Details are described in the foregoing embodiments, and will not be described here.

[0081] In the foregoing embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0082] In the description of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0083] The display device and the display correction method of the display device provided in the embodiments of the present application are described in detail. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the foregoing embodiment descriptions are only for helping understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will have changes, and the foregoing description of the present application should not be understood as the limitation of the present application.

Claims

1. A display device, characterized in that, The display panel comprises a movement, a power management module and a display panel which are electrically connected in sequence; the movement is configured to obtain a first frame rate of a signal source in a first time period and a second frame rate of the signal source in a second time period, the first time period is earlier than the second time period, and the signal source comprises multiple frames of images; if the first frame rate is not matched with the second frame rate, a blanking time period corresponding to the second frame rate and multiple target gamma voltage values determined according to the brightness of multiple pixel units on each frame of the images are calculated, and the blanking time period and the multiple target gamma voltage values are transmitted to the power management module; the power management module is configured to drive the display panel according to the multiple target gamma voltage values in the blanking time period, so as to maintain the brightness of the display panel, and the movement is further configured to obtain a first average image level value of multiple pixel units on each frame of the images in the first time period and a second average image level value of multiple pixel units on each frame of the images in the second time period; the absolute value of a first difference value of the first average image level value and the second average image level value is calculated; and the multiple target gamma voltage values are obtained according to the absolute values of multiple first difference values.

2. A display device, characterized by comprising: The display panel comprises a movement, a power management module and a display panel which are electrically connected in sequence; the movement is configured to obtain a first frame rate of a signal source in a first time period and a second frame rate of the signal source in a second time period, the first time period is earlier than the second time period, and the signal source comprises multiple frames of images; if the first frame rate is not matched with the second frame rate, a blanking time period corresponding to the second frame rate and multiple target gamma voltage values determined according to the brightness of multiple pixel units on each frame of the images are calculated, and the blanking time period and the multiple target gamma voltage values are transmitted to the power management module; the power management module is configured to drive the display panel according to the multiple target gamma voltage values in the blanking time period, so as to maintain the brightness of the display panel, and the movement is further configured to obtain a first average image level value of multiple pixel units on each frame of the images in the first time period and a second average image level value of multiple pixel units on each frame of the images in the second time period; a target average image level value of the first average image level value and the second average image level value is calculated; the absolute value of a second difference value of the multiple target average image level values and corresponding first average image level values is calculated; and the multiple target gamma voltage values are obtained according to the absolute values of multiple second difference values.

3. The display device according to claim 1 or 2, wherein The movement is configured to obtain the first frame rate corresponding to the nth frame of the signal source and the second frame rate corresponding to the (n+1)th frame of the signal source; wherein n is a positive integer.

4. The display device according to claim 1 or 2, wherein The power management module comprises multiple registers, each of which is configured to obtain a driving voltage according to the target gamma voltage value, and input the driving voltage to the display panel in the blanking time period to display images.

5. A display correction method of a display device, characterized by, It comprises: obtaining a first frame rate of a signal source in a first time period; obtaining a second frame rate of the signal source in a second time period, the first time period is earlier than the second time period, and the signal source comprises multiple frames of images; If the first frame rate does not match the second frame rate, a blanking time period corresponding to the second frame rate is calculated, and a plurality of target gamma voltage values are determined according to brightness of a plurality of pixel units on each frame of the image; During the blanking time period, the image is displayed according to the plurality of target gamma voltage values; The determination of the plurality of target gamma voltage values according to the brightness of the plurality of pixel units on each frame of the image comprises: obtaining a first average image level value of the plurality of pixel units on each frame of the image in a second time period and a second average image level value of the plurality of pixel units on each frame of the image in the second time period; The absolute value of a first difference value between the first average image level value and the second average image level value is calculated; The plurality of target gamma voltage values are calculated according to the absolute values of the plurality of first difference values.

6. A display correction method of a display device, characterized by, It comprises: a first frame rate of a signal source in a first time period is obtained; a second frame rate of the signal source in a second time period is obtained, the first time period is earlier than the second time period, and the signal source comprises a plurality of frames of images; If the first frame rate does not match the second frame rate, a blanking time period corresponding to the second frame rate is calculated, and a plurality of target gamma voltage values are determined according to brightness of a plurality of pixel units on each frame of the image; During the blanking time period, the image is displayed according to the plurality of target gamma voltage values; The determination of the plurality of target gamma voltage values according to the brightness of the plurality of pixel units on each frame of the image comprises: obtaining a first average image level value of the plurality of pixel units on each frame of the image in a second time period and a second average image level value of the plurality of pixel units on each frame of the image in the second time period; calculating a target average image level value of the first average image level value and the second average image level value; calculating the absolute value of a second difference value between the plurality of target average image level values and corresponding first average image level values; and obtaining the plurality of target gamma voltage values according to the absolute values of the plurality of second difference values.

7. The display correction method of a display device according to claim 5 or 6, wherein The first frame rate of the signal source in the first time period and the second frame rate of the signal source in the second time period are obtained, the first time period is earlier than the second time period, and the signal source comprises a plurality of frames of images; the first frame rate of the signal source corresponding to the nth frame and the second frame rate of the signal source corresponding to the n+1th frame are obtained; wherein n is a positive integer.

8. The display correction method of a display device according to claim 5 or 6, wherein During the blanking time period, the image is displayed according to the target gamma voltage value, which comprises obtaining a driving voltage according to the target gamma voltage value, and displaying the image according to the driving voltage during the blanking time period.

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