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

Abstract

The application provides a display device, a display device image brightness adjustment method and a storage medium. The display device comprises a display screen, a processor and a timing controller. The display screen is used for displaying different frame images. The processor is used for establishing a mapping relationship between different refresh frequency segments and VCOM, VGL and VGH. The timing controller is used for detecting the refresh rate of the current frame image of the display screen when the display device is in a 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 mapping relationship established above, 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. The application makes the display brightness of the current frame image adjusted according to the target VCOM, the target VGL and the target VGH more accurate, and reduces the screen flicker problem.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to display device technology. More particularly, to a display device, a display device image brightness adjustment method and a storage medium. BACKGROUND

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

[0003] In the prior art, in the VRR mode, the pixel has an inconsistent leakage time during the VRR switching process, resulting in screen flicker (screen flashing). 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 flashing phenomenon.

[0004] However, the current method for improving the screen flashing phenomenon has poor effect, and the display screen still has a relatively obvious screen flicker problem. SUMMARY

[0005] Embodiments of the present application provide a display device, a display device image brightness adjustment method and a storage medium, which are used to solve the problem that the display screen still has a relatively obvious screen flicker problem in the prior art.

[0006] In a first aspect, embodiments of the present application provide a display device, comprising:

[0007] a display screen configured to display images of different frames;

[0008] a processor connected to the display screen, the processor being configured to:

[0009] establish a mapping relationship between different refresh frequency segments and liquid crystal molecule deflection reference voltage VCOM, thin film transistor TFT off-state voltage VGL and on-state voltage VGH, respectively;

[0010] a timing controller connected to the processor and the display screen, respectively, the timing controller being configured to:

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

[0012] 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 relationship;

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

[0014] In the present application, the processor divides the refresh rate into different refresh frequency segments, and establishes the mapping relationship between the 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 inputs to 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, the target VGL and the target VGH corresponding to the refresh frequency segment according to the mapping relationship. Further, the display brightness of the current frame image adjusted according to the target VCOM, the target VGL and the target VGH is more accurate, thereby effectively reducing the problem of flicker of the display screen.

[0015] In some embodiments of the present application, when the processor is configured to establish the mapping relationship between the 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, it is specifically configured to:

[0016] Obtain the refresh rate range of the display device;

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

[0018] For any refresh frequency segment, the lower limit value of the refresh frequency segment is taken 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 a preset algorithm;

[0019] According to the VCOM, VGL and VGH corresponding to the different refresh frequency segments, the mapping relationship between the 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 is established.

[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 the mapping relationship established according to the VCOM, VGL and VGH corresponding to the different refresh frequency segments is more accurate.

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

[0022] determine the VCOM under the target refresh rate according to the target refresh rate and a preset preferred algorithm;

[0023] determine a target brightness value of image adjustment according to the display panel parameters of the display device, the display panel parameters including a display panel fixed refresh rate;

[0024] adjust the VGL and the VGH under the VCOM under the target refresh rate until the display brightness value of the image reaches the target brightness value;

[0025] determine the adjusted VGL and the VGH as the VGL and the VGH corresponding to the refresh frequency segment when the display brightness value of the image reaches the target brightness value.

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

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

[0028] obtain the display panel parameters of the display device, the display panel parameters including a display panel fixed refresh rate;

[0029] determine a standard brightness value of the image under the display panel fixed refresh rate according to a corresponding relationship between the display panel fixed refresh rate and a preset standard brightness value;

[0030] determine the standard brightness value as the target brightness value of 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, and further making the VGL and the 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, the timing controller is specifically configured to:

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

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

[0035] determine a refresh rate of the current frame image of the display screen 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 determines the refresh rate of the current frame image of the display screen according to the refresh duration, which is more in line with the actual refresh rate.

[0037] In some embodiments of the present application, 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 mapping relationship established according to the refresh rate, and is specifically configured to:

[0038] determine the target refresh frequency segment corresponding to the refresh rate in the mapping relationship according to the refresh rate;

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

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

[0041] In some embodiments of the present application, 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, and is specifically configured to:

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

[0043] write the target VGL and the target VGH into a second power management integrated circuit chip through the integrated circuit bus, and 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] adjust the display brightness of the current frame image in the display screen according to the adjusted VCOM, VGL and VGH.

[0045] In the present application, after the timing controller determines the target VCOM, the target VGL and the 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, so that the image brightness displayed according to the adjusted voltage makes the display picture more smooth.

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

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

[0048] In a second aspect, the embodiments of the present application provide a display device image brightness adjustment method, which comprises:

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

[0050] According to the mapping relationship between the refresh rate and 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 target VCOM, the target VGL and the target VGH corresponding to the refresh rate are determined;

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

[0052] In the present application, when the display device is in a 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, the target VGL and the target VGH corresponding to the refresh frequency segment are determined according to the mapping relationship. Further, the display brightness of the current frame image adjusted according to the target VCOM, the target VGL and the target VGH is more accurate, which effectively reduces the problem of display screen flicker and improves the user's visual experience.

[0053] In a third aspect, the embodiments of the present application provide a computer readable storage medium, and the computer readable storage medium stores computer execution instructions. When the computer execution instructions are executed by a processor, the method of the second aspect is implemented.

[0054] In the present application, the computer readable storage medium is provided to provide storage conditions for executing the display device image brightness adjustment method. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings needed to be used in the embodiments or related art description. Obviously, the drawings described in the following are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0056] FIG. 1A A low-frequency flicker schematic diagram provided for the embodiments of the present application;

[0057] FIG. 1B A variable-frequency flicker schematic diagram provided for the embodiments of the present application;

[0058] FIG. 2 A structure schematic diagram of a display device provided for the embodiments of the present application;

[0059] FIG. 3 A flowchart of a scheme for establishing the mapping relationship between different refresh frequency segments and VCOM, VGL and VGH provided for the embodiments of the present application;

[0060] FIG. 4 A flowchart of a method for determining VCOM, VGL and VGH corresponding to a refresh frequency segment provided for the embodiments of the present application;

[0061] FIG. 5 A flowchart of a method for adjusting the display brightness of a current frame image in a display screen provided for the embodiments of the present application;

[0062] FIG. 6 A structure schematic diagram of another display device provided for the embodiments of the present application;

[0063] FIG. 7 A flowchart of a method for adjusting the image brightness of a display device provided for the embodiments of the present application;

[0064] FIG. 8 An adjusting device for the image brightness of a display device provided for the embodiments of the present application. DETAILED DESCRIPTION

[0065] In order to make the purpose, implementation manners and advantages of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to clearly and completely describe the exemplary implementation manners of the present application. Obviously, the described exemplary embodiments are only some embodiments of the present application, but not all the embodiments.

[0066] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0067] Furthermore, the terms "comprise", "comprising", "have", "having", "include", "including" and "contains", "containing", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or article that comprises a list of components does not include only those components but can include other components not expressly listed or inherent to such product or article.

[0068] The rapid development of display technology has enabled 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 a smoother visual effect. For example, in a high frame rate game scene, adjusting the refresh rate of the display device through VRR to match the adjusted refresh rate with the frame rate of the game picture can reduce the stuttering and tearing of the game picture, thereby providing a smoother visual effect.

[0069] When the display device is in a variable refresh rate (VRR) mode, the VRR has a constant charging time of the pixel during the refresh rate switching process, but the V-blank area changes with the frame rate, resulting in inconsistent discharge times of the pixel during the VRR switching process, and thus causing screen flicker.

[0070] In order to facilitate understanding of the cause of the screen flicker, the following describes the cause of the screen flicker through FIG. 1A to FIG. 1B .

[0071] FIG. 1A A low-frequency screen flicker diagram provided for an embodiment of the present application is shown in FIG. 1A , which takes a liquid crystal television as an example. When the liquid crystal television is at a low frame rate (low refresh rate), the voltage is reduced due to the pixel discharge of the liquid crystal television. If the liquid crystal molecule deflection reference voltage VCOM is maintained at the original value, the liquid crystal of the display screen will have screen flicker when the positive and negative half-cycle voltages are asymmetric (△V1≠△V2) if the VCOM is not the optimal value when the positive and negative half-cycle voltages are reversed.

[0072] FIG. 1B A variable frequency screen flicker diagram provided for an embodiment of the present application is shown in FIG. 1B , which also takes a liquid crystal television as an example. When the liquid crystal television is at a high frame rate (high refresh rate), the positive and negative half-cycle voltages of the liquid crystal of the display screen are almost symmetrical (△V3=△V4) when the positive and negative half-cycle voltages are reversed, i.e., the VCOM is the optimal value. When the liquid crystal television changes from a low frame rate to a high frame rate, the pixel discharge is different at different frame rates, i.e., the pixel discharge is more at a low frame rate, and the image display brightness is relatively low, and the pixel discharge is less at a high frame rate, and the image display brightness is relatively high. Therefore, there is a relatively obvious brightness difference when the liquid crystal television changes from a low frame rate to a high frame rate, resulting in screen flicker.

[0073] In the prior art, in order to reduce the screen flicker phenomenon in the VRR mode, the brightness of the display image is usually adjusted by any one of the following methods: 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 well improve the screen flicker phenomenon, and the display screen still has a relatively obvious picture flicker problem, which affects the user's visual experience.

[0074] In order to solve the above technical problems in the prior art, the present application provides a display device, a display device image brightness adjustment method and a storage medium. The display device comprises a display screen, a processor and a timing controller. The display screen is used to display images of different frames. The processor is used to establish a mapping relationship between different refresh frequency segments and liquid crystal molecule deflection reference voltage VCOM, off-state voltage VGL of a thin film transistor TFT and on-state voltage VGH, and input the mapping relationship 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, 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, and then 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. The present application makes the display brightness of the current frame image adjusted according to the target VCOM, the target VGL and the target VGH more accurate, and effectively reduces the picture flicker problem of the display screen.

[0075] The display device provided by the embodiments of the present application can have various implementation forms, for example, can be a liquid crystal television, a monitor, an electronic bulletin board, an electronic table, etc., and the type of the display device is not limited in the present application.

[0076] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be 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 can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0077] FIG. 2 A structural schematic diagram of a display device provided by an embodiment of the present application is shown in FIG. 2 The display device comprises a display screen 201, a processor 202 and a timing controller 203.

[0078] The connection relationship is as follows:

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

[0080] The processor 202 is configured 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.

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

[0082] The processor 202 is configured 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.

[0083] In this embodiment, the processor 202 can also be a controller, a SOC master chip, or an operating system, and the type of the processor 202 is not limited in the present application.

[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 of the thin film transistor TFT and the on-state voltage VGH corresponding to each refresh frequency segment according to a preset algorithm or detection method, and finally obtains the mapping relationship as shown in Table 1.

[0085] Table 1

[0086] Refresh frequency band 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 VGLn VGHn

[0087] In this embodiment, the on-state voltage VGH of the thin film transistor TFT is considered because the on-state voltage VGH affects 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 charges the display panel to form a pixel. When VGH decreases, the on-state leakage current decreases, and the brightness loss decreases.

[0088] The off-state voltage VGL of the thin film transistor TFT is considered because the off-state voltage VGL affects the current condition when the TFT is turned off, and the current condition affects the holding condition of the pixel after charging, thereby affecting the optical properties of the display image. When VGL decreases, the off-state leakage current decreases, and the brightness loss decreases.

[0089] Therefore, in the present application, in addition to considering 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 the 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, the mapping relationship is transmitted to the timing controller 203 through 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] The display end time of the current frame image in the display screen 201 and the display start time of the next frame image are detected, the refresh duration of the current frame is determined according to the display end time and the display start time, and the refresh rate of the current frame image of the display screen 201 is determined according to the refresh duration.

[0094] The timing controller 203 is further 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, and adjust the display brightness of the current frame image in the display screen 201 according to the target VCOM, the target VGL and the target VGH.

[0095] For example,

[0096] Suppose the detected refresh rate of the current frame image of the display screen 201 corresponds to the refresh frequency segment of Fre3-Fre4 in Table 1, so it can be determined that the target VCOM under this refresh rate is VCOM2, the target VGL is VGL2, and the target VGH is VGH2. Further, 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 embodiments of the present application, the display device includes a display screen, a processor and a timing controller. The display screen is used to display images of different frames, 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 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 the variable refresh rate mode, and determine the target VCOM, the target VGL and the 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, the target VGL and the target VGH. The present application makes the display brightness of the current frame image adjusted according to the target VCOM, the target VGL and the target VGH more accurate, effectively reducing the problem of flicker of the display screen.

[0098] Further, on the basis of the above embodiments, the process of the processor establishing 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 is explained in detail by the following embodiments.

[0099] FIG. 3 A flowchart of a scheme for establishing a mapping relationship between different refresh frequency segments and VCOM, VGL and VGH is provided for an embodiment of the present application, as shown in FIG. 3 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 attribute data of the display device, for example, 48HZ-144HZ. It can be understood that the above range is only used for illustration and does not limit the present application.

[0102] S302. According to the refresh rate range, perform refresh frequency segment division to obtain different refresh frequency segments.

[0103] For example,

[0104] For example, according to a preset algorithm, 48HZ-144HZ can be divided into multiple refresh frequency segments every fixed frequency step.

[0105] For another example, in response to a user operation, 48HZ-144HZ can be divided into multiple refresh frequency segments according to a user indication.

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

[0107] S303. For any refresh frequency segment, take the lower limit value of the refresh frequency segment as a 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] A possible implementation is:

[0109] FIG. 4 A flowchart of a method for determining VCOM, VGL and VGH corresponding to a refresh frequency segment provided for an embodiment of the present application is shown in FIG. 4 The processor is configured to perform the following steps:

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

[0111] For any refresh frequency segment, take the minimum value of the refresh frequency segment as a target refresh rate for adjusting VCOM, and perform voltage test on VCOM at the target refresh rate through a preset preferred algorithm according to a color analyzer and a Flicker chart to obtain a VCOM curve, and determine VCOM corresponding to the minimum inflection point of the curve as the optimal VCOM at the target refresh rate.

[0112] S402, determine the target brightness value of image adjustment according to the display panel parameter of the display device, and the display panel parameter includes the fixed refresh rate of the display panel.

[0113] Obtain the display panel parameter of the display device, wherein the display panel parameter includes the fixed refresh rate of the display panel. According to the corresponding relationship between the fixed refresh rate of the display panel and the preset standard brightness value, the standard brightness value of the image under the fixed refresh rate of the display panel is determined, and the standard brightness value is determined as the target brightness value of image adjustment.

[0114] Exemplary,

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

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

[0117] After determining the VCOM under 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] Repeat steps S401-S404 to obtain the VCOM, VGL and VGH corresponding to each refresh frequency segment.

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

[0121] In the above embodiment of the present application, the processor acquires the refresh rate range of the display device, and performs refresh frequency segment division 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 taken 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. Finally, the mapping relationship between different refresh frequency segments and VCOM, VGL and VGH is established according to VCOM, VGL and VGH corresponding to different refresh frequency segments. The method of the embodiment makes the determined VCOM, VGL and VGH of each refresh frequency segment more accurate, and facilitates the subsequent determination of VCOM, VGL and VGH for adjusting the brightness of image display according to the refresh rate of the display device, thereby effectively reducing the flicker phenomenon of the display screen.

[0122] Further, after the processor creates the mapping relationship between different refresh frequency segments and liquid crystal molecule deflection reference voltage VCOM, off-state voltage VGL and 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, target VGL and target VGH corresponding to the refresh rate according to the refresh rate and the established mapping relationship, it is specifically configured to:

[0124] According to the refresh rate, the 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, target VGL and target VGH, the display brightness of the current frame image in the display screen is adjusted according to the target VCOM, target VGL and target VGH. As shown in FIG. 5 FIG. 5 A flowchart of a method for adjusting the display brightness of the current frame image in the display screen provided by the embodiment of the present application is shown. The method comprises the following steps:

[0127] S501, write the target VCOM into the first power management integrated circuit chip through the integrated circuit bus, and the first power management integrated circuit chip is 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 IIC.

[0129] ​S502, write the target VGL and the target VGH to the second power management integrated circuit chip through an integrated circuit bus, and the second power management integrated circuit chip is configured to adjust the voltage of the VGL to the target VGL and to adjust the voltage of the VGH to the target VGH.

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

[0131] S503, adjust 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 adjusted VCOM, VGL and VGH of the PMIC, thereby reducing the screen flicker phenomenon.

[0133] In the present application, a display device image brightness adjustment method is also provided, which can be realized 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 shown in FIG. 6 , FIG. 6 Another display device structure diagram is provided for the embodiments of the present application.

[0134] The processor can be a SOC control chip 601, configured to create a 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, and input to the timing control chip 602.

[0135] The timing controller 6021 in the timing control chip 602 is configured to determine the target VCOM, the target VGL and the target VGH corresponding to the refresh rate of the current frame image in the display screen according to the mapping relationship, and write the target VCOM, the target VGL and the target VGH to 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 adjusted VCOM, VGL and VGH of the PMIC chip 6022.

[0136] Specifically,

[0137] FIG. 7 A flowchart of a display device image brightness adjustment method provided by the embodiments of the present application is shown in FIG. 7 , and the method comprises the following steps:

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

[0139] S702, determine target VCOM, target VGL and target VGH corresponding to the refresh rate according to the 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 respectively.

[0140] S703, 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.

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

[0142] FIG. 8 A display device image brightness adjustment device is provided in the embodiments of the present application, the device comprises: 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, the target VGL and the target VGH corresponding to the refresh rate according to the 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 respectively.

[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 display device image brightness adjustment device provided in the embodiments of the present application can execute the display device image brightness adjustment method in the above method embodiments, and the implementation principle and technical effects are similar, which will not be repeated here.

[0147] It should be noted that the above FIG. 8 The division of each module shown above is only a kind of demonstration, the division of each module and the naming of each module are not limited in the present application.

[0148] The application further provides a computer readable storage medium, which can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage media that can store program codes. Specifically, the computer readable storage medium stores computer execution instructions, and the program instructions are used for the method in the above embodiments.

[0149] The application further provides a program product, which includes execution instructions stored in a readable storage medium. At least one control module of a display device can read the execution instructions from the readable storage medium, and the at least one control module executes the execution instructions to enable the display device to implement the method for adjusting the image brightness of the display device provided in the various embodiments.

[0150] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

[0151] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained according to the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified 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, the processor being configured to establish mapping relationships between different refresh frequency segments and a liquid crystal molecule deflection reference voltage VCOM, an off-state voltage VGL, and an on-state voltage VGH of a thin film transistor TFT; A timing controller, the timing controller is connected to the processor and the display screen respectively, and the timing controller is configured to: When the display device is in a variable refresh rate mode, detecting a refresh rate of a current frame image of the display screen; Determining 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; Adjusting the display brightness of the current frame image in the display screen according to the target VCOM, target VGL, and target VGH; 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 to: Obtaining a refresh rate range of the display device; Dividing 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 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, a mapping relationship is 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; 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 to: 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.

2. The display device according to claim 1, wherein When the processor is configured to determine a target brightness value for image adjustment according to a display panel parameter 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 the 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.

3. The display device according to claim 2, wherein 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 the display of the current frame image and the start time of the display of the next frame image on 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.

4. The display device according to claim 3, wherein 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, 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.

5. The display device according to claim 4, wherein: 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, the timing controller 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.

6. The display device according to claim 5, wherein: The processor inputs the mapping relationship into the timing controller through an integrated circuit bus.

7. A method for adjusting the image brightness of a display device, applied to the display device according to any one of claims 1 to 6, characterized in that: The method comprises: When the display device is in variable refresh rate mode, detecting the refresh rate of the 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 pre-established 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 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.

8. 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 7 is implemented.

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