Backlight control method, device and equipment for black insertion under variable refresh rate and medium

Abstract

The application belongs to the technical field of display and relates to a backlight control method, device, equipment and medium under variable refresh frequency and black insertion. When switching from a first refresh rate to a second refresh rate, a second current change parameter is generated according to the total average current of a second black insertion period and a second display period being equal to a first average current, in combination with a first current change parameter, a third current change parameter is generated according to the average current of a second balance period being equal to the first average current, and the current output of the second display period and the second balance period is controlled according to the second current change parameter and the third current change parameter. The current output under the second refresh rate is dynamically adjusted in combination with the actual current change parameter under the first refresh rate, the display flicker caused by the brightness change being too large when switching from continuous execution of multiple frames under one refresh rate to another refresh rate due to the existence of current deviation is avoided, and the consistency of picture brightness under different refresh rates is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a backlight control method and device for black frame insertion under variable refresh rate, equipment and medium. BACKGROUND

[0002] In the prior art, when implementing the black frame insertion (BFI) technology under the variable refresh rate (VRR), the core idea of calculating the average brightness is generally display time / (display time+black frame insertion time)*display brightness. This method only executes a single frame under one refresh rate. At this time, after switching to another refresh rate, there may be no backlight flicker problem. However, after continuously executing multiple frames under one refresh rate, at this time, after switching to another refresh rate, although the brightness calculated according to the average brightness algorithm theoretically will not cause flicker, in fact, due to factors such as differences in circuit response speed, precision limitations of components, temperature fluctuations, or delays in control signals, the existence of current deviation in actual control will cause the brightness under different refresh rates to be unable to completely consistent when switching, resulting in the same picture presenting two different brightnesses under different refresh rates, thereby possibly causing visual discomfort and flicker. Therefore, how to control the display current when switching the refresh rate after continuously executing multiple frames under one refresh rate to avoid display flicker caused by brightness change has become a problem to be solved. SUMMARY

[0003] Therefore, a backlight control method and device for black frame insertion under variable refresh rate are provided to solve the problem of how to control the display current when switching the refresh rate after continuously executing multiple frames under one refresh rate to avoid display flicker caused by brightness change.

[0004] In a first aspect, an embodiment of the present application provides a backlight control method for black frame insertion under variable refresh rate, comprising:

[0005] When a backlight partition of a display panel is switched from a first refresh rate to a second refresh rate, a first current change parameter in a first display period under the first refresh rate and a first average current under the first refresh rate are obtained.

[0006] According to the fact that the total average current of a second black frame insertion period and a second display period under the second refresh rate is equal to the first average current, a second current change parameter for controlling the second display period is generated in combination with the first current change parameter.

[0007] According to the fact that the average current of a second balance period under the second refresh rate is equal to the first average current, a third current change parameter for controlling the second balance period is generated.

[0008] The control module controls current output of the second display period according to the second current variation parameter, and controls current output of the second balance period according to the third current variation parameter.

[0009] In a second aspect, an embodiment of the present application provides a backlight control device for black insertion under variable refresh rate, comprising:

[0010] The acquisition module is configured to acquire a first current variation parameter in a first display period in a first refresh rate and a first average current in the first refresh rate when a backlight subregion of a display panel switches from the first refresh rate to a second refresh rate.

[0011] The first adjustment module is configured to generate a second current variation parameter for controlling the second display period according to the total average current of the second black insertion period and the second display period in the second refresh rate being equal to the first average current, and in combination with the first current variation parameter.

[0012] The second adjustment module is configured to generate a third current variation parameter for controlling the second balance period according to the average current of the second balance period in the second refresh rate being equal to the first average current.

[0013] The control module controls current output of the second display period according to the second current variation parameter, and controls current output of the second balance period according to the third current variation parameter.

[0014] In a third aspect, an embodiment of the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the backlight control method for black insertion under variable refresh rate according to the first aspect when executing the computer program.

[0015] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, wherein the computer program is executable on a processor to implement the steps of the backlight control method for black insertion under variable refresh rate according to the first aspect.

[0016] The present application differs from the technical effects achieved by the prior art solutions, and the present application generates a second current variation parameter for controlling the second display period according to the total average current of the second black insertion period and the second display period in the second refresh rate being equal to the first average current in the first refresh rate, in combination with the first current variation parameter, generates a third current variation parameter for controlling the second balance period according to the average current of the second balance period in the second refresh rate being equal to the first average current, controls current output of the second display period according to the second current variation parameter, and controls current output of the second balance period according to the third current variation parameter.

[0017] Wherein, when different refresh rate switching is carried out under variable refresh rate black insertion, by ensuring that the total average current of the second black insertion period and the second display period under the second refresh rate, and the average current of the second balance period are consistent with the first average current under the first refresh rate, and combining the actual current variation parameter under the first refresh rate, the current output under the second refresh rate is dynamically adjusted, the display flicker caused by the brightness change during different refresh rate switching due to the existence of current deviation is avoided, the consistency of picture brightness under different refresh rates is improved, and the visual experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a flowchart of a backlight control method of variable refresh rate black insertion provided by the first embodiment of the present application;

[0020] Figure 2 is a flowchart of a backlight control method of variable refresh rate black insertion provided by the second embodiment of the present application;

[0021] Figure 3 is a current timing diagram of backlight partition under the first refresh rate provided by the second embodiment of the present application;

[0022] Figure 4 is a flowchart of a backlight control method of variable refresh rate black insertion provided by the third embodiment of the present application;

[0023] Figure 5 is a current timing diagram of backlight partition under the second refresh rate provided by the third embodiment of the present application;

[0024] Figure 6 is a flowchart of a backlight control method of variable refresh rate black insertion provided by the fourth embodiment of the present application;

[0025] Figure 7 is a current timing diagram of backlight partition under the second refresh rate provided by the fourth embodiment of the present application;

[0026] Figure 8 is a flowchart of a backlight control method of variable refresh rate black insertion provided by the fifth embodiment of the present application;

[0027] Figure 9This is a current timing diagram of a backlight partition at a second refresh rate provided in Embodiment 5 of the present invention;

[0028] Figure 10 This is a schematic diagram of a variable refresh rate black-insertion backlight control device provided in Embodiment Six of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of a computer device provided in Embodiment 7 of the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be understood that the sequence number of each step in the following embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0032] like Figure 1 The diagram shown is a flowchart illustrating a variable refresh rate black-insertion backlight control method according to Embodiment 1 of the present invention, which may include the following steps:

[0033] Step S101: When a backlight zone of the display panel switches from the first refresh rate to the second refresh rate, obtain the first current change parameter and the first average current under the first refresh rate during the first display period.

[0034] In this embodiment, the backlight partition can refer to a partition obtained by dividing the backlight component of the display panel, each backlight partition corresponds to a pixel partition of the display panel, each pixel partition contains at least one row of liquid crystal pixels, the first refresh rate and the second refresh rate respectively refer to two different refresh rates of the display panel, for example, the first refresh rate and the second refresh rate can be 180Hz, 120Hz, 75Hz and 60Hz, etc. The vertical synchronization signal period of the backlight partition under the first refresh frequency is divided to obtain the first black insertion period, the first display period and the first balance period. The first black insertion period is used for black insertion operation to achieve the display picture black insertion effect. The first display period is used for frame display. The first balance period is used for adjusting the brightness consistency of the pixels in the pixel partition. The first current change parameter can refer to the actual output current parameter value in the first display period. The first current change parameter can include the starting current, the intermediate current, the current change number and the current change amount of the first display period, etc. The first average current can refer to the average value of the currents of the first black insertion period, the first display period and the first balance period under the first refresh rate.

[0035] Specifically, when any backlight partition is switched from the first refresh rate to the second refresh rate, the first current change parameter is obtained, the average current of the first display period is obtained according to the first current change parameter, the brightness current of the first black insertion period is obtained, the brightness current of the first balance period is obtained according to the length of the first black insertion period, the brightness current, and the length and average current of the first display period, and the first average current is obtained according to the brightness current of the first black insertion period, the average current of the first display period and the brightness current of the first balance period.

[0036] Step S102: According to the total average current of the second black insertion period and the second display period in the second refresh rate being equal to the first average current, the second current change parameter controlling the second display period is generated in combination with the first current change parameter.

[0037] In this embodiment, the vertical synchronization signal period of the backlight partition under the second refresh frequency is divided to obtain the second black insertion period, the second display period and the second balance period. The second black insertion period is used for black insertion operation to achieve the display picture black insertion effect. The second display period is used for frame display. The second balance period is used for adjusting the brightness consistency of the pixels in the pixel partition. The total average current can refer to the average value of the currents of the second black insertion period and the second display period. The second current change parameter can refer to the parameter value controlling the current output of the second display period. The second current change parameter can include the starting current, the intermediate current, the current change number and the current change amount of the second display period, etc.

[0038] Specifically, in the case of ensuring that the total average current of the second black insertion period and the second display period is equal to the first average current, the starting current, the intermediate current, the number of current changes, and the current change amount of the first display period in the first current change parameter are adjusted to generate the second current change parameter for controlling the second display period.

[0039] Step S103: generating a third current change parameter for controlling the second balance period according to the average current of the second balance period in the second refresh rate being equal to the first average current.

[0040] Step S104: controlling the current output of the second display period according to the second current change parameter and controlling the current output of the second balance period according to the third current change parameter.

[0041] In the embodiment, the third current change parameter can refer to a parameter value for controlling the current output of the second balance period, and the third current change parameter can include the luminance current output by the second balance period.

[0042] Specifically, in the case of ensuring that the average current of the second balance period is equal to the first average current, the third current change parameter for controlling the second balance period is generated according to the luminance current of the second black insertion period and the second current change parameter of the second display period, the current output of the second display period is controlled according to the second current change parameter, and the current output of the second balance period is controlled according to the third current change parameter.

[0043] Alternatively, the present application can be applied to the scenes of direct current (DC) dimming and pulse width modulation (PWM) dimming. In the application scene of DC dimming, the actual current change parameter under the first refresh rate can be combined to directly and dynamically adjust the current size under the second refresh rate to realize brightness adjustment, that is, when the current increases, the brightness increases, and when the current decreases, the brightness decreases. In the application scene of PWM dimming, the actual current change parameter under the first refresh rate can be combined to dynamically adjust the duty cycle under the second refresh rate to realize brightness adjustment, that is, when the duty cycle increases, the brightness increases, and when the duty cycle decreases, the brightness decreases.

[0044] In the embodiment, when only a single frame is executed at one refresh rate and then switched to another refresh rate, the current deviation amount only exists between the single frames corresponding to the two adjacent refresh rates, and generally does not have a great influence on the luminance after the switching. When multiple frames are continuously executed at one refresh rate and then switched to another refresh rate, the current deviation of each frame gradually accumulates, so that the accumulated current deviation of the multiple frames has a great influence on the luminance after the switching. The application dynamically adjusts the current output at the second refresh rate on the basis of ensuring that the total average current of the second black insertion period and the second display period at the second refresh rate and the average current of the second balancing period are consistent with the first average current at the first refresh rate, and combining the actual current change parameter at the first refresh rate, avoids the display flicker caused by the great change in luminance when one refresh rate is continuously executed for multiple frames and then switched to another refresh rate due to the existence of the accumulated current deviation of the multiple frames, improves the consistency of the picture luminance at different refresh rates, and improves the visual experience.

[0045] As shown in Figure 2 , it is a flowchart of a backlight control method for variable refresh rate black insertion provided by the second embodiment of the application. The step S101 of obtaining the first current change parameter in the first display period at the first refresh rate and the first average current at the first refresh rate can include the following steps:

[0046] Step S201: obtaining the average current of the first display period according to the starting current, the intermediate current and the number of current changes in the first current change parameter.

[0047] Step S202: obtaining the luminance current of the first black insertion period at the first refresh rate, and obtaining the luminance current of the first balancing period at the first refresh rate according to the time length and the luminance current of the first black insertion period, and the time length and the average current of the first display period.

[0048] Step S203: obtaining the first average current according to the luminance current of the first black insertion period, the average current of the first display period and the luminance current of the first balancing period.

[0049] In the embodiment, the starting current can be the current value corresponding to the starting time point of the first display period, the intermediate current can be the current value corresponding to the intermediate time point in the first display period, the number of current changes can be the number of current changes from the starting current to the intermediate current, the current change amount can be the amount of current change each time, and the luminance current can be the current value output to maintain a certain luminance level.

[0050] For example, as shown in Figure 3The diagram shown is a current timing diagram of a backlight partition at a first refresh rate according to Embodiment 2 of the present invention. The vertical synchronization signal cycle of the backlight partition at the first refresh rate is divided into a first black insertion period, a first display period, and a first balancing period, with durations of T1, T2, and T3 respectively. The brightness current of the first black insertion period is I1, the initial current of the first display period is I2-1, the intermediate current is I2-2, and the brightness current of the first balancing period is I3. Regarding the brightness current I1 of the first black insertion period, there is... For the first display period, during the process of changing from the initial current to the intermediate current, the current change gradually increases, and it increases a total of 3 times to reach the intermediate current. Therefore, the number of current changes is determined to be 3. In the first display period, starting from the initial current I2-1, the current change gradually increases, and after 3 changes, it reaches the intermediate current I2-2. After maintaining this position for a period of time, the current change gradually decreases, and after 3 changes, it reaches the initial current I2-1.

[0051] Specifically, firstly, the average current of the first display period is obtained based on the starting current, intermediate current, and number of current changes in the first current change parameters. Then, the brightness current of the first balance period is obtained based on the duration and brightness current of the first blackout period, as well as the duration and average current of the first display period. Finally, the brightness current of the first blackout period, the average current of the first display period, and the brightness current of the first balance period are averaged to obtain the first average current.

[0052] The formula for calculating the luminance current during the first equilibrium period is as follows: Wherein, I3 is the brightness current of the first balanced period, T1 is the duration of the first black insertion period, T2 is the duration of the first display period, I1 is the brightness current of the first black insertion period, and I2 is the average current of the first display period.

[0053] In this embodiment, the brightness current of the first balanced period and the first average current at the first refresh rate are obtained based on the starting current, intermediate current and number of current changes in the first current change parameters, as well as the brightness current during the first blackout period. This provides actual current parameters for adjusting the current output at the second refresh rate when switching refresh rates, further improving the accuracy of the current output at the second refresh rate and improving the consistency of screen brightness at different refresh rates.

[0054] like Figure 4 The diagram shown is a flowchart of a variable refresh rate black insertion backlight control method according to Embodiment 3 of the present invention. In step S102 above, the total average current of the second black insertion period and the second display period in the second refresh rate is equal to the first average current. Combined with the first current change parameter, the second current change parameter for controlling the second display period is generated, which may include the following steps:

[0055] Step S401: Based on the fact that the total average current is equal to the first average current, update the starting current and intermediate current in the first current change parameters respectively to obtain the updated starting current and updated intermediate current.

[0056] Step S402: Update the starting current to the starting current of the second display period, and update the intermediate current to the intermediate current of the second display period.

[0057] Step S403: Combine the starting current and intermediate current of the second display period with the number of current changes and the amount of current change in the first current change parameter to form the second current change parameter.

[0058] In this embodiment, updating the starting current can refer to the current after updating the starting current in the first changing parameter, and updating the intermediate current can refer to the current after updating the intermediate current in the first changing parameter.

[0059] For example, such as Figure 5 The diagram shown is a current timing diagram of a backlight partition at a second refresh rate, provided in Embodiment 3 of the present invention.

[0060] Note: The frame displayed at the first refresh rate is the last frame after a series of consecutive frames at that refresh rate. There is at least one frame that also belongs to the first refresh rate before this refresh rate. For the sake of simplicity, the preceding frame is not shown in the illustration. Similarly, the frame displayed at the second refresh rate is the first frame at that refresh rate. There may be frames that also belong to the second refresh rate after this refresh rate. For the sake of simplicity, the following frames are not shown in the illustration.

[0061] like Figure 5 As shown, the backlight partition is divided into a second black insertion period, a second display period, and a second balancing period during the vertical synchronization signal cycle of the second refresh rate. The durations of each period are T1', T2', and T3', respectively. While ensuring that the total average current is equal to the first average current, the starting current I2-1 and the intermediate current I2-2 in the first current change parameter are updated to obtain the updated starting current I2-1' and the updated intermediate current I2-2'. The updated starting current I2-1' is used as the starting current of the second display period, and the updated intermediate current is used as the intermediate current of the second display period. The starting current and intermediate current of the second display period, as well as the number of current changes and the amount of current change in the first current change parameter, are combined to form the second current change parameter.

[0062] For the second display period, starting from the starting current I2-1', gradually increase according to the current change amount, after 3 changes reach the intermediate current I2-2', after keeping for a period of time, gradually decrease according to the current change amount, after 3 changes reach the starting current I2-1'.

[0063] In the embodiment, in the case of ensuring that the total average current is equal to the first average current, the current output under the second refresh rate is dynamically adjusted in combination with the actual current change parameter under the first refresh rate, which avoids the display flicker caused by the too large brightness change when switching from the continuous execution of multiple frames under one refresh rate to another refresh rate due to the existence of the current deviation accumulated by multiple frames, improves the consistency of the picture brightness under different refresh rates, and improves the visual experience.

[0064] As Figure 6 shown, a flowchart of a backlight control method for variable refresh rate black insertion provided by Embodiment Four of the application, the step S102 of generating the second current change parameter for controlling the second display period in combination with the first current change parameter according to the total average current of the second black insertion period and the second display period under the second refresh rate being equal to the first average current, can further include the following steps:

[0065] Step S601: updating the starting current and the current change amount in the first current change parameter respectively according to the total average current being equal to the first average current, to obtain an updated starting current and an updated current change amount.

[0066] Step S602: taking the updated starting current as the starting current of the second display period, and taking the updated current change amount as the current change amount of the second display period.

[0067] Step S603: forming the second current change parameter by taking the starting current and the current change amount of the second display period, and taking the intermediate current and the current change number in the first current change parameter.

[0068] Optionally, the step S102 of generating the second current change parameter for controlling the second display period in combination with the first current change parameter according to the total average current of the second black insertion period and the second display period under the second refresh rate being equal to the first average current can further include:

[0069] updating the starting current and the current change number in the first current change parameter respectively according to the total average current being equal to the first average current, to obtain an updated starting current and an updated current change number;

[0070] taking the updated starting current as the starting current of the second display period, and taking the updated current change number as the current change number of the second display period.

[0071] The second current change parameter is formed by combining the update start current and the number of current changes during the second display period, as well as the intermediate current and the amount of current change in the first current change parameter.

[0072] In this embodiment, the updated current change amount can refer to the current after updating the current change amount in the first current change parameter, and the updated current change number can refer to the number of times the current change amount in the first current change parameter is updated.

[0073] For example, such as Figure 7 The diagram shown is a current timing diagram of a backlight partition at a second refresh rate according to Embodiment 4 of the present invention. The vertical synchronization signal period of the backlight partition at the second refresh rate is divided into a second black insertion period, a second display period, and a second balancing period, with the durations of each period being T1”, T2”, and T3”, respectively. While ensuring that the total average current equals the first average current, the starting current I2-1 in the first current change parameter is updated to the starting current I2-1”. The number of current changes in the first display period is updated from 3 to 2. The updated starting current I2-1” is used as the starting current of the second display period, and the number of current changes is updated to the number of current changes in the second display period. The starting current and the number of current changes in the second display period, along with the intermediate current and the amount of current change in the first current change parameter, are combined to form the second current change parameter.

[0074] For the second display period, starting from the initial current I2-1", the current gradually increases according to the change amount, reaching the intermediate current I2-2 after two changes. After maintaining this position for a period of time, the current gradually decreases according to the change amount, reaching the initial current I2-1 after two changes.

[0075] In this embodiment, while ensuring that the total average current is equal to the first average current, the current output at the second refresh rate is dynamically adjusted in combination with the actual current change parameters at the first refresh rate. This avoids the display flickering caused by excessive brightness changes when switching to another refresh rate after executing multiple frames continuously at one refresh rate due to the existence of current deviation accumulated over multiple frames. This improves the consistency of screen brightness at different refresh rates and enhances the visual experience.

[0076] like Figure 8 The diagram shown is a flowchart of a backlight control method with variable refresh rate black insertion provided in Embodiment 5 of the present invention. In step S102 above, based on the fact that the total average current during the second black insertion period and the second display period in the second refresh rate equals the first average current, and combined with the first current change parameter, a second current change parameter for controlling the second display period is generated. This step may further include the following steps:

[0077] Step S801: Based on the fact that the total average current is equal to the first average current, update the number of current changes in the first current change parameter to obtain the updated number of current changes;

[0078] Step S802: Update the number of current changes to the number of current changes in the second display period, set the starting current in the first current change parameter to the intermediate current in the second display period, and set the intermediate current in the first current change parameter to the starting current in the second display period.

[0079] Step S803: The starting current, intermediate current, and number of current changes during the second display period, along with the amount of current change in the first current change parameter, are used to form the second current change parameter.

[0080] Optionally, step S102 above, which generates a second current change parameter for controlling the second display period based on the fact that the total average current of the second black insertion period and the second display period in the second refresh rate equals the first average current, and in combination with the first current change parameter, further includes:

[0081] Based on the fact that the total average current is equal to the first average current, the current change in the first current change parameter is updated to obtain the updated current change.

[0082] The current change will be updated to the current change during the second display period, the starting current in the first current change parameter will be set to the intermediate current during the second display period, and the intermediate current in the first current change parameter will be set to the starting current during the second display period.

[0083] The starting current, intermediate current, and current change amount of the second display period, along with the number of current changes in the first current change parameter, are used to form the second current change parameter.

[0084] like Figure 9 The diagram shown is a current timing diagram of a backlight partition at a second refresh rate according to Embodiment 5 of the present invention. The vertical synchronization signal period of the backlight partition at the second refresh rate is divided into a second black insertion period, a second display period, and a second balancing period, with the durations of each period being T1'", T2'", and T3'", respectively. While ensuring that the total average current equals the first average current, the number of current changes during the first display period is updated from 3 to 2. The starting current I2-1 in the first current change parameter is taken as the intermediate current during the second display period, the intermediate current I2-2 in the first current change parameter is taken as the starting current during the second display period, and the number of current changes updated twice is taken as the number of current changes during the second display period. The starting current, intermediate current, and number of current changes during the second display period, along with the current change amount in the first current change parameter, are combined to form the second current change parameter.

[0085] For the second display period, starting from the initial current I2-2, the current gradually decreases according to the change amount, and after two changes, it reaches the intermediate current I2-1. After maintaining this for a period of time, the current gradually increases according to the change amount, and after two changes, it reaches the initial current I2-2.

[0086] In this embodiment, while ensuring that the total average current is equal to the first average current, the current output at the second refresh rate is dynamically adjusted in combination with the actual current change parameters at the first refresh rate. This avoids the display flickering caused by excessive brightness changes when switching to another refresh rate after executing multiple frames continuously at one refresh rate due to the existence of current deviation accumulated over multiple frames. This improves the consistency of screen brightness at different refresh rates and enhances the visual experience.

[0087] like Figure 10 The diagram shown is a structural schematic of a variable refresh rate black-insertion backlight control device according to Embodiment Six of this application. This variable refresh rate black-insertion backlight control device corresponds one-to-one with the aforementioned variable refresh rate black-insertion backlight control method. The variable refresh rate black-insertion backlight control device includes a first acquisition module 1001, a first adjustment module 1002, a second adjustment module 1003, and a control module 1004. Detailed descriptions of each functional module are as follows:

[0088] The acquisition module 1001 is used to acquire the first current change parameter and the first average current under the first refresh rate when a backlight zone of the display panel switches from the first refresh rate to the second refresh rate.

[0089] The first adjustment module 1002 is used to generate a second current change parameter for controlling the second display period based on the fact that the total average current of the second black insertion period and the second display period in the second refresh rate is equal to the first average current, and in combination with the first current change parameter.

[0090] The second adjustment module 1003 is used to generate a third current change parameter for controlling the second balanced period based on the fact that the average current during the second balanced period in the second refresh rate is equal to the first average current.

[0091] The control module 1004 is used to control the current output during the second display period according to the second current change parameter, and to control the current output during the second balanced period according to the third current change parameter.

[0092] Optionally, the acquisition module 1001 mentioned above includes:

[0093] The first calculation unit is used to obtain the average current of the first display period based on the starting current, intermediate current and number of current changes in the first current change parameters.

[0094] The second calculation unit is configured to obtain a luminance current of a first blanking period in the first refresh rate according to a time length of the first blanking period and the luminance current, and a time length of the first display period and the average current, and obtain a luminance current of a first balancing period in the first refresh rate.

[0095] The third calculation unit is configured to obtain the first average current according to the luminance current of the first blanking period, the average current of the first display period, and the luminance current of the first balancing period.

[0096] Optionally, the first adjustment module 1002 comprises:

[0097] The first updating unit is configured to update a starting current and an intermediate current in the first current change parameter respectively according to that the total average current is equal to the first average current, to obtain an updated starting current and an updated intermediate current.

[0098] The first determination unit is configured to take the updated starting current as a starting current of the second display period, and take the updated intermediate current as an intermediate current of the second display period.

[0099] The first forming unit is configured to form the second current change parameter by using the starting current and the intermediate current of the second display period, and a current change number and a current change amount in the first current change parameter.

[0100] Optionally, the first adjustment module 1002 further comprises:

[0101] The second updating unit is configured to update a starting current and a current change amount in the first current change parameter respectively according to that the total average current is equal to the first average current, to obtain an updated starting current and an updated current change amount.

[0102] The second determination unit is configured to take the updated starting current as a starting current of the second display period, and take the updated current change amount as a current change amount of the second display period.

[0103] The second forming unit is configured to form the second current change parameter by using the starting current and the current change amount of the second display period, and an intermediate current and a current change number in the first current change parameter.

[0104] Optionally, the first adjustment module 1002 further comprises:

[0105] a third updating unit, configured to update the starting current and the current change times in the first current change parameter respectively according to the total average current being equal to the first average current, to obtain an updated starting current and an updated current change times;

[0106] a third determining unit, configured to take the updated starting current as the starting current of the second display period, and take the updated current change times as the current change times of the second display period;

[0107] a third forming unit, configured to form the second current change parameter by using the updated starting current and the current change times of the second display period, and the intermediate current and the current change amount in the first current change parameter.

[0108] Optionally, the first adjusting module 1002 further includes:

[0109] a fourth updating unit, configured to update the current change times in the first current change parameter according to the total average current being equal to the first average current, to obtain an updated current change times;

[0110] a fourth determining unit, configured to take the updated current change times as the current change times of the second display period, take the starting current in the first current change parameter as the intermediate current of the second display period, and take the intermediate current in the first current change parameter as the starting current of the second display period;

[0111] a fourth forming unit, configured to form the second current change parameter by using the starting current, the intermediate current and the current change times of the second display period, and the current change amount in the first current change parameter.

[0112] Optionally, the first adjusting module 1002 further includes:

[0113] a fifth updating unit, configured to update the current change amount in the first current change parameter according to the total average current being equal to the first average current, to obtain an updated current change amount;

[0114] a fifth determining unit, configured to take the updated current change amount as the current change amount of the second display period, take the starting current in the first current change parameter as the intermediate current of the second display period, and take the intermediate current in the first current change parameter as the starting current of the second display period;

[0115] a fifth forming unit, configured to form the second current change parameter by using the starting current, the intermediate current and the current change amount of the second display period, and the current change times in the first current change parameter.

[0116] Specific limitations regarding the variable refresh rate black-insertion backlight control device can be found in the limitations of the variable refresh rate black-insertion backlight control method described above, and will not be repeated here. Each module in the aforementioned variable refresh rate black-insertion backlight control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in the computer device in hardware form, or stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0117] Figure 11 This is a schematic diagram of the structure of a computer device provided in Embodiment Seven of the present invention. Figure 11 As shown, the computer device of this embodiment includes: at least one processor ( Figure 11 Only one is shown in the diagram), a memory, and a computer program stored in the memory and executable on at least one processor. When the processor executes the computer program, it implements the steps in any of the above embodiments of the variable refresh rate black insertion backlight control method.

[0118] This computer device may include, but is not limited to, a processor and memory. Those skilled in the art will understand that... Figure 11 The examples of computer devices are merely examples and do not constitute a limitation on computer devices. Computer devices may include more or fewer components than shown in the illustration, or combinations of certain components, or different components, such as network interfaces, displays, and input devices.

[0119] The processor referred to can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0120] The memory includes a readable storage medium, an internal memory, etc., wherein the internal memory can be a memory of the computer device, and the internal memory provides an environment for running of the operating system and the computer-readable instructions in the readable storage medium. The readable storage medium can be a hard disk of the computer device, and in other embodiments, can also be an external storage device of the computer device, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory can include both an internal storage unit of the computer device and an external storage device. The memory is used to store an operating system, an application program, a BootLoader, data, and other programs, such as program codes of computer programs, etc. The memory can also be used to temporarily store data that has been output or will be output.

[0121] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the unit and module in the above device can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here. If the integrated unit is realized in the form of software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the present application realizes all or part of the processes in the above-mentioned embodiment methods, which can be realized by a computer program to instruct related hardware to complete, and the computer program can be stored in a computer readable storage medium. The computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form. The computer readable medium at least includes any entity or device capable of carrying computer program code, recording medium, computer memory, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, computer readable medium cannot be electrical carrier signal and telecommunication signal.

[0122] The present application realizes all or part of the processes in the above-mentioned embodiment methods, which can also be completed by a computer program product. When the computer program product runs on the computer equipment, it makes the computer equipment execute the steps in the above-mentioned embodiment methods.

[0123] In the above-mentioned embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0124] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0125] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / computer device and method can be implemented in other manners. For example, the described apparatus / computer device embodiments are merely illustrative. For example, the division of the modules or units can be different, and each can include a plurality of units or a plurality of modules. For example, some or all of the units can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0126] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments.

[0127] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones, and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A backlight control method of variable refresh rate under-insert black, characterized in that, The application relates to a display panel and a display method thereof. When a backlight partition of a display panel is switched from a first refresh rate to a second refresh rate, a first current change parameter in a first display period in the first refresh rate and a first average current under the first refresh rate are obtained, wherein the first current change parameter comprises a starting current, an intermediate current, a current change frequency and a current change amount of the first display period; According to total average current of a second blanking period and a second display period in the second refresh rate being equal to the first average current, a third current change parameter for controlling the second balance period is generated, wherein the third current change parameter comprises a luminance current output in the second balance period, and the average current is calculated according to the luminance current in the third current change parameter and the time length of the second balance period; According to the second current change parameter, the current output of the second display period is controlled, and according to the third current change parameter, the current output of the second balance period is controlled. The first current change parameter in the first display period in the first refresh rate and the first average current under the first refresh rate are obtained, comprising:

2. The variable refresh rate black insertion backlight control method of claim 1, wherein, According to the starting current, the intermediate current and the current change frequency in the first current change parameter, the average current of the first display period is obtained; The luminance current of the first blanking period in the first refresh rate is obtained, and the luminance current of the first balance period in the first refresh rate is obtained according to the time length and the luminance current of the first blanking period and the time length and the average current of the first display period; The first average current is obtained according to the luminance current of the first blanking period, the average current of the first display period and the luminance current of the first balance period. ​ 3. The variable refresh rate black insertion backlight control method of claim 1, wherein, The total average current of the second blank insertion period and the second display period in the second refresh rate is equal to the first average current, the initial current, the intermediate current, the current change number and the current change amount in the first current change parameter are updated, and the second current change parameter for controlling the second display period is generated, including: According to the total average current equal to the first average current, the initial current and the intermediate current in the first current change parameter are updated respectively to obtain an updated initial current and an updated intermediate current; The updated initial current is the initial current of the second display period, and the updated intermediate current is the intermediate current of the second display period; The initial current and the intermediate current of the second display period, and the current change number and the current change amount in the first current change parameter form the second current change parameter.

4. The variable refresh rate black insertion backlight control method of claim 1, wherein, The total average current of the second blank insertion period and the second display period in the second refresh rate is equal to the first average current, the initial current, the intermediate current, the current change number and the current change amount in the first current change parameter are updated, and the second current change parameter for controlling the second display period is generated, including: According to the total average current equal to the first average current, the initial current and the current change amount in the first current change parameter are updated respectively to obtain an updated initial current and an updated current change amount; The updated initial current is the initial current of the second display period, and the updated current change amount is the current change amount of the second display period; The initial current and the current change amount of the second display period, and the intermediate current and the current change number in the first current change parameter form the second current change parameter.

5. The variable refresh rate black insertion backlight control method of claim 1, wherein, The total average current of the second blank insertion period and the second display period in the second refresh rate is equal to the first average current, the initial current, the intermediate current, the current change number and the current change amount in the first current change parameter are updated, and the second current change parameter for controlling the second display period is generated, including: According to the total average current equal to the first average current, the initial current and the current change number in the first current change parameter are updated respectively to obtain an updated initial current and an updated current change number; The updated initial current is the initial current of the second display period, and the updated current change number is the current change number of the second display period; The updated initial current and the current change number of the second display period, and the intermediate current and the current change amount in the first current change parameter form the second current change parameter.

6. The variable refresh rate lower black insertion backlight control method of claim 1, wherein, The total average current of the second blank insertion period and the second display period in the second refresh rate is equal to the first average current, the initial current, the intermediate current, the current change number and the current change amount in the first current change parameter are updated, and the second current change parameter for controlling the second display period is generated, including: According to the total average current equaling the first average current, the number of current changes in the first current change parameter is updated to obtain an updated number of current changes; The updated number of current changes is the number of current changes of the second display period, the starting current in the first current change parameter is the intermediate current of the second display period, and the intermediate current in the first current change parameter is the starting current of the second display period; The starting current, the intermediate current and the number of current changes of the second display period, and the current change amount in the first current change parameter form the second current change parameter.

7. The variable refresh rate lower black insertion backlight control method of claim 1, wherein, According to the total average current equaling the first average current, the number of current changes in the first current change parameter is updated to obtain an updated number of current changes; The updated number of current changes is the number of current changes of the second display period, the starting current in the first current change parameter is the intermediate current of the second display period, and the intermediate current in the first current change parameter is the starting current of the second display period; The starting current, the intermediate current and the number of current changes of the second display period, and the current change amount in the first current change parameter form the second current change parameter. According to the total average current equaling the first average current, the number of current changes in the first current change parameter is updated to obtain an updated number of current changes; 8. A backlight control apparatus of variable refresh rate under-insert black, characterized by, The updated number of current changes is the number of current changes of the second display period, the starting current in the first current change parameter is the intermediate current of the second display period, and the intermediate current in the first current change parameter is the starting current of the second display period; The starting current, the intermediate current and the number of current changes of the second display period, and the current change amount in the first current change parameter form the second current change parameter. Comprise: The acquisition module is used for acquiring a first current change parameter in a first display period in a first refresh rate and a first average current in the first refresh rate when a backlight sub-area of a display panel is switched from the first refresh rate to a second refresh rate, wherein the first current change parameter comprises a starting current, an intermediate current, a number of current changes and a current change amount of the first display period; The first adjusting module is configured to update the initial current, the intermediate current, the number of current changes and the current change amount in the first current change parameter according to the total average current equal to the second average current in the second black insertion period and the second display period, and generate a second current change parameter for controlling the second display period, wherein the second current change parameter comprises the initial current, the intermediate current, the number of current changes and the current change amount in the second display period, in the second display period, the current value is adjusted by the current change amount in the second display period each time starting from the initial current in the second display period at the initial time point, and the current value is adjusted by the inverse of the current change amount in the second display period each time after reaching the intermediate current in the second display period at the intermediate time point after the number of current changes in the second display period, and the initial current in the second display period is reached at the terminal time point after the number of current changes in the second display period, and the total average current is calculated according to the initial current, the intermediate current, the number of current changes, the current change amount in the second current change parameter and the luminance current in the second black insertion period, in combination with the lengths of the second black insertion period and the second display period; The second adjusting module is configured to generate a third current change parameter for controlling the second balance period according to the average current equal to the total average current in the second balance period, wherein the third current change parameter comprises the luminance current output in the second balance period, and the average current is calculated according to the luminance current in the third current change parameter, in combination with the length of the second balance period. The control module is configured to control the current output in the second display period according to the second current change parameter, and control the current output in the second balance period according to the third current change parameter.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the backlight control method for black insertion under variable refresh rate according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to implement the steps of the backlight control method for black insertion under variable refresh rate according to any one of claims 1 to 7.

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