Display device, display device image brightness adjusting method and storage medium

Abstract

The embodiment of the invention belongs to the display device technology, and provides a display device, a display device image brightness adjusting method and a storage medium. The display device comprises a display screen, a processor and a time sequence controller. The display screen is used for displaying images of different frames, and the processor is used for establishing mapping relations between different refresh frequency bands and the VCOM, the VGL and the VGH. The time schedule controller is used for detecting the refresh rate of the current frame image of the display screen when the display device is in the variable refresh rate mode, determining the target VCOM, the target VGL and the target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relation, and then adjusting the display brightness of the current frame image in the display screen according to the target VCOM, the target VGL and the target VGH. According to the invention, the display brightness of the current frame image adjusted according to the target VCOM, the target VGL and the target VGH is more accurate, and the screen flash problem is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to display device technology, and more specifically, to a display device, a method for adjusting the brightness of an image of a display device, and a storage medium. Background Art

[0002] With the rapid development of display technology, more and more display devices are equipped with variable refresh rate mode (VRR). The VRR mode enables the display device to automatically adjust the refresh rate to match the frame rate, thereby bringing a smooth visual experience to users.

[0003] In the prior art, in VRR mode, there is a problem of inconsistent leakage time of pixels during VRR switching, resulting in flickering of the display screen (screen flicker). Currently, the display brightness of the image is usually adjusted by backlight compensation brightness, gamma voltage compensation brightness and other methods to improve the screen flicker phenomenon.

[0004] However, the current methods for improving the screen flicker phenomenon are less effective, and the display screen still has a relatively obvious screen flicker problem. Summary of the invention

[0005] The embodiments of the present application provide a display device, a method for adjusting the image brightness of the display device, and a storage medium, which are used to solve the problem of obvious screen flickering in the display screen in the prior art.

[0006] In a first aspect, an embodiment of the present application provides a display device, including:

[0007] A display screen, wherein the display screen is configured to: display images of different frames;

[0008] A processor is connected to the display screen, and the processor is configured to:

[0009] Establishing mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT;

[0010] A timing controller, the timing controller is connected to the processor and the display screen respectively, and the timing controller is configured as follows:

[0011] When the display device is in a variable refresh rate mode, detecting a refresh rate of a current frame image of the display screen;

[0012] Determine a target VCOM, a target VGL, and a target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship;

[0013] The display brightness of the current frame image in the display screen is adjusted according to the target VCOM, the target VGL and the target VGH.

[0014] In the present application, the processor segments the refresh rate, establishes mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL of the thin film transistor TFT, and the on-state voltage VGH, and inputs them into the timing controller. When the display device is in the variable refresh rate mode, the timing controller detects the refresh rate of the current frame image of the display screen, and determines the refresh frequency segment corresponding to the refresh rate and the target VCOM, target VGL, and target VGH corresponding to the refresh frequency segment according to the mapping relationship. In this way, the display brightness of the current frame image adjusted according to the target VCOM, target VGL, and target VGH is more accurate, thereby effectively reducing the problem of screen flickering on the display screen.

[0015] In some embodiments of the present application, when the processor is configured to establish mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT, respectively, the processor is specifically configured as follows:

[0016] Obtaining a refresh rate range of the display device;

[0017] According to the refresh rate range, the refresh frequency segments are divided to obtain different refresh frequency segments;

[0018] For any refresh frequency segment, the lower limit value of the refresh frequency segment is used as the target refresh rate for adjusting VCOM, and VCOM, VGL and VGH corresponding to the refresh frequency segment are determined according to the target refresh rate and a preset algorithm;

[0019] According to VCOM, VGL and VGH corresponding to different refresh frequency segments, mapping relationships are established between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

[0020] In the present application, the processor divides the refresh rate range of the display device to obtain different refresh frequency segments, detects each refresh frequency segment, and thereby determines the VCOM, VGL, and VGH corresponding to each refresh frequency segment, so that the determined VCOM, VGL, and VGH corresponding to each refresh frequency segment are more accurate, and thus the mapping relationship established according to the VCOM, VGL, and VGH corresponding to different refresh frequency segments is more accurate.

[0021] In some embodiments of the present application, when the processor is configured to determine VCOM, VGL, and VGH corresponding to the refresh frequency segment according to the target refresh rate and a preset algorithm, the processor is specifically configured as follows:

[0022] Determine VCOM at the target refresh rate according to the target refresh rate and a preset optimal algorithm;

[0023] Determining a target brightness value for image adjustment according to display panel parameters of the display device, wherein the display panel parameters include a fixed refresh rate of the display panel;

[0024] Under VCOM at the target refresh rate, adjusting VGL and VGH until the display brightness value of the image reaches the target brightness value;

[0025] When the display brightness value of the image reaches the target brightness value, the adjusted VGL and VGH are determined as the VGL and VGH corresponding to the refresh frequency segment.

[0026] In the present application, the processor determines the VCOM of the corresponding refresh frequency segment according to the target refresh rate determined for each refresh frequency segment, and determines the VGL and VGH of each refresh frequency segment according to the obtained fixed refresh rate of the display panel, thereby improving the feasibility and convenience of obtaining the VCOM, VGL and VGH corresponding to each refresh frequency segment.

[0027] In some embodiments of the present application, when the processor is configured to determine the target brightness value for image adjustment according to the display panel parameters of the display device, the processor is specifically configured to:

[0028] Acquire display panel parameters of the display device, wherein the display panel parameters include a fixed refresh rate of the display panel;

[0029] Determining a standard brightness value of an image at a fixed refresh rate of the display panel according to a correspondence between a fixed refresh rate of the display panel and a preset standard brightness value;

[0030] The standard brightness value is determined as a target brightness value for image adjustment.

[0031] In the present application, the processor determines the target brightness value according to the determined standard brightness value, thereby providing a basis for determining the target brightness value, thereby making the VGL and VGH determined according to the target brightness value more accurate.

[0032] In some embodiments of the present application, when the timing controller is configured to detect the refresh rate of the current frame image of the display screen, it is specifically configured as follows:

[0033] Detecting the end time of display of the current frame image and the start time of display of the next frame image in the display screen;

[0034] Determining a refresh duration of a current frame according to the display end time and the display start time;

[0035] The refresh rate of the current frame image of the display screen is determined according to the refresh duration.

[0036] In the present application, the timing controller determines the refresh duration according to the display end time of the current frame image and the display start time of the next frame image, and then the refresh rate of the current frame image of the display screen determined according to the refresh duration is more in line with the current actual refresh rate.

[0037] In some embodiments of the present application, when the timing controller is configured to determine the target VCOM, target VGL, and target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship, it is specifically configured as follows:

[0038] According to the refresh rate, determining a target refresh frequency segment corresponding to the refresh rate in the mapping relationship;

[0039] The VCOM, VGL and VGH corresponding to the target refresh frequency segment are determined as the target VCOM, target VGL and target VGH corresponding to the refresh rate.

[0040] In the present application, the timing controller adjusts the display brightness of the image according to VCOM, VGL and VGH corresponding to the refresh rate in the mapping relationship, effectively reducing the screen flicker problem of the display screen at the current refresh rate.

[0041] In some embodiments of the present application, when the timing controller is configured to adjust the display brightness of the current frame image in the display screen according to the target VCOM, the target VGL and the target VGH, it is specifically configured as follows:

[0042] Writing the target VCOM into a first power management integrated circuit chip through an integrated circuit bus, wherein the first power management integrated circuit chip is used to adjust the voltage of VCOM to the target VCOM;

[0043] Writing the target VGL and the target VGH into a second power management integrated circuit chip through the integrated circuit bus, wherein the second power management integrated circuit chip is used to adjust the voltage of VGL to the target VGL and to adjust the voltage of VGH to the target VGH;

[0044] The display brightness of the current frame image in the display screen is adjusted according to the adjusted VCOM, VGL and VGH.

[0045] In the present application, after the timing controller determines the target VCOM, target VGL and target VGH, it writes them into the corresponding power management integrated circuit chip through the integrated circuit bus, and adjusts the voltage through the corresponding power management integrated circuit chip. The image brightness displayed according to the adjusted voltage makes the display picture smoother.

[0046] In some embodiments of the present application, the processor inputs the mapping relationship into the timing controller through an integrated circuit bus.

[0047] In the present application, the processor inputs the mapping relationship into the timing controller through the integrated circuit bus, thereby improving the transmission efficiency and convenience.

[0048] In a second aspect, an embodiment of the present application provides a method for adjusting the brightness of an image of a display device, comprising:

[0049] When the display device is in a variable refresh rate mode, detecting a refresh rate of a current frame image of the display screen;

[0050] Determine the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the mapping relationship between the pre-established different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT;

[0051] The display brightness of the current frame image in the display screen is adjusted according to the target VCOM, the target VGL and the target VGH.

[0052] In the present application, when the display device is in the variable refresh rate mode, the refresh rate of the current frame image of the display screen is detected, and the refresh frequency segment corresponding to the refresh rate and the target VCOM, target VGL and target VGH corresponding to the refresh frequency segment are determined according to the mapping relationship. Thus, the display brightness of the current frame image adjusted according to the target VCOM, target VGL and target VGH is more accurate, effectively reducing the problem of screen flickering on the display screen and improving the user's viewing visual experience.

[0053] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, the method described in the second aspect is implemented.

[0054] In the present application, a computer-readable storage medium is provided, which provides storage conditions for executing a method for adjusting the brightness of an image of a display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0056] Figure 1A A schematic diagram of a low-frequency screen flicker provided in an embodiment of the present application;

[0057] Figure 1B A schematic diagram of a variable frequency screen flash provided in an embodiment of the present application;

[0058] Figure 2 A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0059] Figure 3 A schematic diagram of a flow chart of a solution for establishing mapping relationships between different refresh frequency segments and VCOM, VGL and VGH respectively provided in an embodiment of the present application;

[0060] Figure 4 A flowchart of a method for determining VCOM, VGL and VGH corresponding to a refresh frequency segment provided in an embodiment of the present application;

[0061] Figure 5 A flowchart of a method for adjusting the display brightness of a current frame image in a display screen provided in an embodiment of the present application;

[0062] Figure 6 A schematic diagram of the structure of another display device provided in an embodiment of the present application;

[0063] Figure 7 A schematic diagram of a flow chart of a method for adjusting the image brightness of a display device provided in an embodiment of the present application;

[0064] Figure 8 A device for adjusting the image brightness of a display device is provided in an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0066] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0067] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0068] The rapid development of display technology has led to the widespread application of variable refresh rate VRR technology. VRR is a display technology that can adjust the refresh rate in real time according to the changes in screen content to provide smoother visual effects. Taking high-frame-rate game scenes as an example, by adjusting the refresh rate of the display device through VRR so that the adjusted refresh rate matches the frame rate of the game screen, the freeze and tearing of the game screen can be reduced, thereby providing a smoother visual effect.

[0069] When the display device is in variable refresh rate VRR mode, the charging time of the pixels remains unchanged during the refresh rate switching process, but the field blanking V-blank area changes with the frame rate, resulting in inconsistent leakage time of the pixels during the VRR switching process, which in turn causes screen flickering.

[0070] In order to understand the cause of the screen flicker phenomenon, Figure 1A to Figure 1B To illustrate:

[0071] Figure 1A A schematic diagram of a low-frequency screen flicker provided in an embodiment of the present application is shown in FIG. Figure 1A As shown, the display device takes an LCD TV as an example. When the LCD TV operates at a low frame rate and a low refresh rate, the voltage decreases due to the leakage of the LCD TV pixels. If the liquid crystal molecule deflection reference voltage VCOM maintains the original value unchanged, the liquid crystal of the display screen will flicker when the positive and negative are flipped due to the asymmetry of the positive and negative half-cycle voltages (△V1≠△V2), that is, if VCOM is not an optimal value.

[0072] Figure 1B A schematic diagram of a variable frequency screen flash provided in an embodiment of the present application, such as Figure 1B As shown, the display device also takes the LCD TV as an example. At high frame rate and high refresh rate, the positive and negative half-cycle voltages of the liquid crystal of the display screen of the LCD TV are almost symmetrical when the positive and negative are flipped (△V3=△V4), that is, VCOM is the optimal value. When the LCD TV changes from a low frame rate to a high frame rate, due to the different pixel leakage at different frame rates, the low frame rate has more leakage, and the image display brightness is relatively low. The high frame rate has less leakage, and the image display brightness is relatively high. Therefore, when the LCD TV changes from a low frame rate to a high frame rate, there is a relatively obvious brightness difference, resulting in screen flicker.

[0073] In order to reduce the screen flicker phenomenon in VRR mode, the prior art usually adjusts the brightness of the displayed image by backlight compensation brightness, adjusting the voltage table ACC table and gamma voltage compensation brightness, or adjusting the VCOM voltage. However, the prior art does not improve the screen flicker phenomenon very well, and the display screen still has a relatively obvious screen flicker problem, which affects the user's viewing experience.

[0074] In order to solve the above technical problems in the prior art, the present application proposes a display device, a method for adjusting the image brightness of the display device and a storage medium, wherein the display device includes a display screen, a processor and a timing controller. Among them, the display screen is used to display images of different frames, and the processor is used to establish a mapping relationship between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL of the thin film transistor TFT and the on-state voltage VGH, and input it to the timing controller. The timing controller is used to detect the refresh rate of the current frame image of the display screen when the display device is in a variable refresh rate mode, and determine the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the above-established mapping relationship, and then adjust the display brightness of the current frame image in the display screen according to the target VCOM, target VGL and target VGH. The present application makes the display brightness of the current frame image adjusted according to the target VCOM, target VGL and target VGH more accurate, and effectively reduces the problem of flickering on the display screen.

[0075] The display device provided in the embodiments of the present application may have various implementation forms, for example, it may be a liquid crystal television, a monitor, an electronic bulletin board, an electronic table, etc. The present application does not limit the type of the display device.

[0076] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0077] Figure 2 A schematic diagram of a display device provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the display device includes: a display screen 201 , a processor 202 and a timing controller 203 .

[0078] The connection relationship is:

[0079] The display screen 201 is connected to the processor 202 , and the timing controller 203 is connected to the display screen 201 and the processor 202 respectively.

[0080] Its functions are:

[0081] The display screen 201 is configured to display images of different frames.

[0082] The processor 202 is configured to establish mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

[0083] In this embodiment, the processor 202 may also be a controller, a SOC main control chip, or an operating system, etc., and this application does not limit its type.

[0084] The processor 202 divides the refresh rate range of the display device into multiple refresh frequency segments, and determines the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT corresponding to each refresh frequency segment according to a preset algorithm or detection method, and finally obtains the mapping relationship shown in Table 1.

[0085] Table 1

[0086] Refresh frequency range VCOM voltage value VGL voltage value VGH voltage value Fre1-Fre2 VCOM1 VGL1 VGH1 Fre3-Fre4 VCOM2 VGL2 VGH2 Fre5-Fre6 VCOM3 VGL3 VGH3 ... ... ... ... Frem-Fren VCOMn VxD Vx

[0087] In this embodiment, the on-state voltage VGH of the thin film transistor TFT is considered because the on-state voltage VGH will affect the current condition when the TFT is turned on. In the display device, after the horizontal TFT switch is turned on, the vertical TFT circuit will charge the display panel to form pixels. When VGH decreases, the on-state leakage current will decrease and the brightness loss will be reduced.

[0088] The reason why the off-state voltage VGL of the thin film transistor TFT is considered is that the off-state voltage VGL affects the current condition when the TFT is turned off, and the current condition affects the retention condition of the pixel after charging, thereby affecting the optical properties of the displayed image. When VGL decreases, the off-state leakage current will decrease and the brightness loss will decrease.

[0089] Therefore, in the present application, in addition to the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT are also considered.

[0090] After the processor 202 establishes mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT, the mapping relationship is transmitted to the timing controller 203 via the integrated circuit bus IIC.

[0091] The timing controller 203 is configured to detect the refresh rate of the current frame image of the display screen 201 when the display device is in the variable refresh rate mode.

[0092] One possible implementation is:

[0093] Detect the end time of the display of the current frame image and the start time of the display of the next frame image in the display screen 201, determine the refresh time of the current frame according to the end time and the start time, and determine the refresh rate of the current frame image of the display screen 201 according to the refresh time.

[0094] The timing controller 203 is further configured to determine the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship, and adjust the display brightness of the current frame image in the display screen 201 according to the target VCOM, target VGL and target VGH.

[0095] For example,

[0096] Assuming that the refresh rate of the current frame image of the display screen 201 detected corresponds to the refresh frequency segment of Fre3-Fre4 in Table 1, it can be determined that the target VCOM under the refresh rate is VCOM2, the target VGL is VGL2, and the target VGH is VGH2. Then, the display brightness of the current frame image in the display screen 201 is adjusted according to VCOM2, VGL2, and VGH2.

[0097] In the above-mentioned embodiment of the present application, the display device includes a display screen, a processor and a timing controller. Among them, the display screen is used to display images of different frames, and the processor is used to establish a mapping relationship between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL of the thin film transistor TFT and the on-state voltage VGH, and input it to the timing controller. The timing controller is used to detect the refresh rate of the current frame image of the display screen when the display device is in a variable refresh rate mode, and determine the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the above-mentioned established mapping relationship, and then adjust the display brightness of the current frame image in the display screen according to the target VCOM, target VGL and target VGH. The present application makes the display brightness of the current frame image adjusted according to the target VCOM, target VGL and target VGH more accurate, and effectively reduces the problem of flickering on the display screen.

[0098] Furthermore, based on the above embodiments, the following embodiments describe in detail the process of the processor establishing mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

[0099] Figure 3 A flowchart of a solution for establishing mapping relationships between different refresh frequency segments and VCOM, VGL, and VGH provided in an embodiment of the present application is shown as follows: Figure 3 As shown, the processor is configured to perform the following steps:

[0100] S301. Obtain a refresh rate range of a display device.

[0101] The processor obtains the refresh rate range from the attribute data of the display device, for example, 48HZ-144HZ. It is understood that the above range is only used for illustration and is not intended to limit the present application.

[0102] S302 , dividing the refresh frequency segments according to the refresh rate range to obtain different refresh frequency segments.

[0103] For example,

[0104] For example, according to a preset algorithm, 48 Hz-144 Hz may be divided into multiple refresh frequency segments at fixed frequency steps.

[0105] For another example, in response to user operations and according to user instructions, 48 ​​Hz-144 Hz may be divided into multiple refresh frequency segments.

[0106] This embodiment does not limit the method of dividing the refresh frequency segments, which can be determined according to actual application conditions, etc.

[0107] S303 . For any refresh frequency segment, use the lower limit value of the refresh frequency segment as the target refresh rate for adjusting VCOM, and determine VCOM, VGL and VGH corresponding to the refresh frequency segment according to the target refresh rate and a preset algorithm.

[0108] One possible implementation is:

[0109] Figure 4 A flow chart of a method for determining VCOM, VGL and VGH corresponding to a refresh frequency segment provided in an embodiment of the present application is shown as follows: Figure 4 As shown, the processor is configured to perform the following steps:

[0110] S401 : Determine VCOM at the target refresh rate according to the target refresh rate and a preset optimization algorithm.

[0111] For any refresh frequency segment, the minimum value of the refresh frequency segment is used as the target refresh rate for adjusting VCOM. According to the color analyzer and the Flicker chart, a voltage test is performed on the VCOM at the target refresh rate through a preset optimization algorithm to obtain a VCOM curve. The VCOM corresponding to the minimum inflection point of the curve is determined as the optimal VCOM at the target refresh rate.

[0112] S402 . Determine a target brightness value for image adjustment according to display panel parameters of the display device, where the display panel parameters include a fixed refresh rate of the display panel.

[0113] Obtain display panel parameters of the display device, wherein the display panel parameters include a fixed refresh rate of the display panel. According to the correspondence between the fixed refresh rate of the display panel and a preset standard brightness value, determine a standard brightness value of an image at the fixed refresh rate of the display panel, and determine the standard brightness value as a target brightness value for image adjustment.

[0114] For example,

[0115] Assuming that the fixed refresh rate of the display panel is 120 Hz, it can be determined that the refresh rate of the display device in non-VRR mode is 120 Hz. According to the preset relationship between the preset refresh rate and the standard brightness value, the standard brightness value corresponding to 120 Hz can be determined, and the standard brightness value is the target brightness value.

[0116] S403 , adjusting VGL and VGH at VCOM at the target refresh rate until the display brightness value of the image reaches the target brightness value.

[0117] After determining VCOM at the target refresh rate, VGL and VGH are continuously adjusted until the display brightness of the image reaches the target brightness value determined in the above step.

[0118] S404 , when the display brightness value of the image reaches the target brightness value, the adjusted VGL and VGH are determined as the VGL and VGH corresponding to the refresh frequency segment.

[0119] Steps S401 - S404 are repeated to obtain VCOM, VGL and VGH corresponding to each refresh frequency segment.

[0120] S304 , according to VCOM, VGL and VGH corresponding to different refresh frequency segments, establish mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

[0121] In the above-mentioned embodiment of the present application, the processor obtains the refresh rate range of the display device, and divides the refresh frequency segments according to the refresh rate range to obtain different refresh frequency segments. For any refresh frequency segment, the lower limit value of the refresh frequency segment is used as the target refresh rate for adjusting VCOM, and the VCOM, VGL and VGH corresponding to the refresh frequency segment are determined according to the target refresh rate and the preset algorithm. Finally, according to the VCOM, VGL and VGH corresponding to different refresh frequency segments, the mapping relationship between different refresh frequency segments and VCOM, VGL and VGH is established. The method of this embodiment makes the determined VCOM, VGL and VGH of each refresh frequency segment more accurate, which is convenient for the subsequent VCOM, VGL and VGH used to adjust the image display brightness determined according to the refresh rate of the display device to be more accurate, thereby effectively reducing the screen flickering phenomenon of the display screen.

[0122] Furthermore, after the processor creates mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT, the mapping relationship is input into the timing controller.

[0123] When the timing controller determines the target VCOM, the target VGL, and the target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship, the timing controller is specifically configured as follows:

[0124] According to the refresh rate, a target refresh frequency segment corresponding to the refresh rate in the mapping relationship is determined.

[0125] The VCOM, VGL and VGH corresponding to the target refresh frequency segment are determined as the target VCOM, target VGL and target VGH corresponding to the refresh rate.

[0126] After the timing controller determines the target VCOM, the target VGL and the target VGH, it adjusts the display brightness of the current frame image in the display screen according to the target VCOM, the target VGL and the target VGH. Figure 5 As shown, Figure 5 A flowchart of a method for adjusting the display brightness of a current frame image in a display screen provided in an embodiment of the present application is provided, and the method comprises the following steps:

[0127] S501 , writing a target VCOM into a first power management integrated circuit chip through an integrated circuit bus, the first power management integrated circuit chip being used to adjust the voltage of VCOM to the target VCOM.

[0128] The timing controller writes the target VCOM into the first power management integrated circuit chip PMIC through the IIC.

[0129] S502, writing the target VGL and the target VGH into the second power management integrated circuit chip through the integrated circuit bus, the second power management integrated circuit chip is used to adjust the voltage of VGL to the target VGL, and to adjust the voltage of VGH to the target VGH.

[0130] The timing controller writes the target VGL and the target VGH into the second power management integrated circuit chip PMIC through the IIC.

[0131] S503 , adjusting the display brightness of the current frame image in the display screen according to the adjusted VCOM, VGL and VGH.

[0132] The timing controller adjusts the display brightness of the current frame image in the display screen according to the VCOM, VGL and VGH adjusted by the PMIC, thereby reducing the screen flicker phenomenon.

[0133] In the present application, a method for adjusting the image brightness of a display device is also provided, which can be implemented by software, hardware, or a combination of software and hardware. The execution subject of the method can be a display device, and the structure of the display device can be as follows: Figure 6 As shown, Figure 6 A schematic diagram of the structure of another display device provided in an embodiment of the present application.

[0134] The processor may be a SOC control chip 601 for creating mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT, and inputting the mapping relationships to the timing control chip 602 .

[0135] The timing controller 6021 in the timing control chip 602 is used to determine the target VCOM, target VGL and target VGH corresponding to the refresh rate of the current frame image of the display screen according to the above-mentioned mapping relationship, and write the target VCOM, target VGL and target VGH into the corresponding power management integrated circuit chip PMIC chip 6022 through IIC, and then the timing controller 6021 adjusts the display brightness of the current frame image in the display screen 603 according to the VCOM, VGL and VGH adjusted by the PMIC chip 6022.

[0136] Specifically,

[0137] Figure 7 A flow chart of a method for adjusting the image brightness of a display device provided in an embodiment of the present application is shown as follows: Figure 7 As shown, the method comprises the following steps:

[0138] S701: When the display device is in a variable refresh rate mode, detect the refresh rate of the current frame image of the display screen.

[0139] S702, determining the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the pre-established mapping relationship between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

[0140] S703 : adjusting the display brightness of the current frame image in the display screen according to the target VCOM, the target VGL and the target VGH.

[0141] In the above embodiments of the present application, the specific implementation steps and technical effects please refer to the above embodiments. To avoid redundancy, this embodiment will not be repeated.

[0142] Figure 8 An apparatus for adjusting the image brightness of a display device provided in an embodiment of the present application includes: a detection module 801, a determination module 802 and an adjustment module 803.

[0143] The detection module 801 is used to detect the refresh rate of the current frame image of the display screen when the display device is in the variable refresh rate mode.

[0144] The determination module 802 is used to determine the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the pre-established mapping relationship between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

[0145] The adjustment module 803 is used to adjust the display brightness of the current frame image in the display screen according to the target VCOM, the target VGL and the target VGH.

[0146] The device for adjusting the image brightness of a display device provided in the embodiment of the present application can execute the method for adjusting the image brightness of a display device in the above method embodiment, and its implementation principle and technical effect are similar and will not be repeated here.

[0147] It should be noted that the above Figure 8 The division of the modules shown is only a schematic diagram, and the present application does not limit the division of the modules and the naming of the modules.

[0148] The present application also provides a computer-readable storage medium, which may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes. Specifically, the computer-readable storage medium stores computer execution instructions, and the program instructions are used for the methods in the above embodiments.

[0149] The present application also provides a program product, which includes an execution instruction, which is stored in a readable storage medium. At least one control module of the display device can read the execution instruction from the readable storage medium, and at least one control module executes the execution instruction so that the display device implements the display device image brightness adjustment method provided by the various embodiments described above.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0151] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: The display device comprises: A display screen, wherein the display screen is configured to: display images of different frames; A processor connected to the display screen, wherein the processor is configured to: establish mapping relationships between different refresh frequency segments and a liquid crystal molecule deflection reference voltage VCOM, an off-state voltage VGL of a thin film transistor TFT, and an on-state voltage VGH; A timing controller, the timing controller is connected to the processor and the display screen respectively, and the timing controller is configured as follows: When the display device is in a variable refresh rate mode, detecting a refresh rate of a current frame image of the display screen; Determine a target VCOM, a target VGL, and a target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship; The display brightness of the current frame image in the display screen is adjusted according to the target VCOM, the target VGL and the target VGH.

2. The display device according to claim 1, characterized in that When the processor is configured to establish mapping relationships between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT, the processor is specifically configured as follows: Obtaining a refresh rate range of the display device; According to the refresh rate range, the refresh frequency segments are divided to obtain different refresh frequency segments; For any refresh frequency segment, the lower limit value of the refresh frequency segment is used as the target refresh rate for adjusting VCOM, and VCOM, VGL and VGH corresponding to the refresh frequency segment are determined according to the target refresh rate and a preset algorithm; According to VCOM, VGL and VGH corresponding to different refresh frequency segments, mapping relationships are established between different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT.

3. The display device according to claim 2, characterized in that When the processor is configured to determine VCOM, VGL, and VGH corresponding to the refresh frequency segment according to the target refresh rate and a preset algorithm, the processor is specifically configured as follows: Determine VCOM at the target refresh rate according to the target refresh rate and a preset optimal algorithm; Determining a target brightness value for image adjustment according to display panel parameters of the display device, wherein the display panel parameters include a fixed refresh rate of the display panel; Under VCOM at the target refresh rate, adjusting VGL and VGH until the display brightness value of the image reaches the target brightness value; When the display brightness value of the image reaches the target brightness value, the adjusted VGL and VGH are determined as the VGL and VGH corresponding to the refresh frequency segment.

4. The display device according to claim 3, characterized in that When the processor is configured to determine the target brightness value for image adjustment according to the display panel parameters of the display device, the processor is specifically configured to: Acquire display panel parameters of the display device, wherein the display panel parameters include a fixed refresh rate of the display panel; Determining a standard brightness value of an image at a fixed refresh rate of the display panel according to a correspondence between a fixed refresh rate of the display panel and a preset standard brightness value; The standard brightness value is determined as a target brightness value for image adjustment.

5. The display device according to any one of claims 1 to 4, characterized in that: When the timing controller is configured to detect the refresh rate of the current frame image of the display screen, it is specifically configured as follows: Detecting the end time of display of the current frame image and the start time of display of the next frame image in the display screen; Determining a refresh duration of a current frame according to the display end time and the display start time; The refresh rate of the current frame image of the display screen is determined according to the refresh duration.

6. The display device according to claim 5, characterized in that When the timing controller is configured to determine the target VCOM, the target VGL, and the target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship, the timing controller is specifically configured as follows: According to the refresh rate, determining a target refresh frequency segment corresponding to the refresh rate in the mapping relationship; The VCOM, VGL and VGH corresponding to the target refresh frequency segment are determined as the target VCOM, target VGL and target VGH corresponding to the refresh rate.

7. The display device according to claim 6, characterized in that When the timing controller is configured to adjust the display brightness of the current frame image in the display screen according to the target VCOM, the target VGL and the target VGH, it is specifically configured as follows: Writing the target VCOM into a first power management integrated circuit chip through an integrated circuit bus, wherein the first power management integrated circuit chip is used to adjust the voltage of VCOM to the target VCOM; Writing the target VGL and the target VGH into a second power management integrated circuit chip through the integrated circuit bus, wherein the second power management integrated circuit chip is used to adjust the voltage of VGL to the target VGL and to adjust the voltage of VGH to the target VGH; The display brightness of the current frame image in the display screen is adjusted according to the adjusted VCOM, VGL and VGH.

8. The display device according to claim 7, characterized in that The processor inputs the mapping relationship into the timing controller through an integrated circuit bus.

9. A method for adjusting the image brightness of a display device, characterized in that: The method comprises: When the display device is in a variable refresh rate mode, detecting a refresh rate of a current frame image of the display screen; Determine the target VCOM, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the mapping relationship between the pre-established different refresh frequency segments and the liquid crystal molecule deflection reference voltage VCOM, the off-state voltage VGL and the on-state voltage VGH of the thin film transistor TFT; The display brightness of the current frame image in the display screen is adjusted according to the target VCOM, the target VGL and the target VGH.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method of claim 9 is implemented.

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