Black insertion backlight control method and device under variable refresh rate, equipment and medium

Abstract

The invention is suitable for the technical field of displays, and relates to a black insertion backlight control method and device under a variable refresh frequency, equipment and a medium. When the first refresh rate is switched to the second refresh rate, generating a second current change parameter according to the fact that the total average current of the second black insertion period and the second display period is equal to the first average current and combining the first current change parameter, and generating a third current change parameter according to the fact that the average current of the second balance period is equal to the first average current and combining the second current change parameter with the third current change parameter; and according to the second current change parameter and the third current change parameter, current output of the second display time period and the second balance time period is controlled. The current output under the second refresh rate is dynamically adjusted in combination with the actual current change parameter under the first refresh rate, so that the condition of display flicker caused by excessive brightness change when switching to another refresh rate after continuously executing multiple frames under one refresh rate due to the existence of current deviation is avoided, and the display quality is improved. And the consistency of the picture brightness under different refresh rates is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a backlight control method, device, equipment and medium for black insertion under a variable refresh rate. Background Art

[0002] In the prior art, when implementing the black frame insertion (BFI) technology under a 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 at one refresh rate. At this time, after switching to another refresh rate, there may be no backlight flickering problem. However, after executing multiple frames continuously at one refresh rate, after switching to another refresh rate, although the brightness calculated according to the average brightness algorithm will not cause flickering in theory, in fact, due to factors such as differences in circuit response speed, precision limitations of components, temperature fluctuations or delays in control signals, the brightness switching at different refresh rates cannot be completely consistent due to the existence of current deviation during actual control, resulting in the same picture showing two different brightnesses at different refresh rates, which may cause visual discomfort and flickering. Therefore, how to control the display current when switching the refresh rate after executing multiple frames continuously at one refresh rate to avoid display flickering caused by brightness changes has become an urgent problem to be solved. Summary of the invention

[0003] Based on this, a backlight control method, device, equipment and medium for black insertion under variable refresh rate are provided to solve the problem of how to control the display current when switching the refresh rate after executing multiple frames continuously at one refresh rate to avoid the display flickering caused by brightness changes.

[0004] In a first aspect, an embodiment of the present invention provides a backlight control method for black insertion under a variable refresh rate, comprising: When a backlight partition of the display panel switches from a first refresh rate to a second refresh rate, obtaining a first current change parameter in a first display period at the first refresh rate and a first average current at the first refresh rate; 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, combined with the first current change parameter, a second current change parameter for controlling the second display period is generated; generating a third current variation parameter for controlling the second balancing period according to that the average current in the second balancing period in the second refresh rate is equal to the first average current; The current output in the second display period is controlled according to the second current variation parameter, and the current output in the second balance period is controlled according to the third current variation parameter.

[0005] In a second aspect, an embodiment of the present invention provides a backlight control device for black insertion under a variable refresh rate, comprising: An acquisition module, configured to acquire, when a backlight partition of a display panel switches from a first refresh rate to a second refresh rate, a first current change parameter in a first display period at the first refresh rate and a first average current at the first refresh rate; a first adjustment module, 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 combining the first current variation parameter; a second adjustment module, configured to generate a third current change parameter for controlling the second balancing period according to that the average current in the second balancing period in the second refresh rate is equal to the first average current; A control module is used to control the current output in the second display period according to the second current change parameter, and to control the current output in the second balance period according to the third current change parameter.

[0006] In a third aspect, an embodiment of the present invention 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 of the first aspect when executing the computer program.

[0007] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the backlight control method for black insertion under a variable refresh rate of the first aspect are implemented.

[0008] The technical effect achieved by the present invention is different from that of the prior art: when the first backlight partition of the display panel switches from the first refresh rate to the second refresh rate, the present invention generates a second current change parameter for controlling the second display period based on 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 under the first refresh rate, combined with the first current change parameter; based on the average current of the second balance period in the second refresh rate being equal to the first average current, generates a third current change parameter for controlling the second balance period; based on the second current change parameter, controls the current output of the second display period; and based on the third current change parameter, controls the current output of the second balance period.

[0009] Among them, when switching between different refresh rates by inserting black at a variable refresh rate, by 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 balance period are consistent with the first average current at the first refresh rate, combined with the actual current change parameters at the first refresh rate, the current output at the second refresh rate is dynamically adjusted, thereby avoiding display flickering caused by brightness changes when switching between different refresh rates due to the existence of current deviation, improving the consistency of picture brightness at different refresh rates, and enhancing the visual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0011] Figure 1 It is a flow chart of a backlight control method for black insertion under a variable refresh rate provided in Embodiment 1 of the present invention; Figure 2 It is a flow chart of a backlight control method for black insertion under a variable refresh rate provided in the second embodiment of the present invention; Figure 3 is a current timing diagram of a backlight partition at a first refresh rate provided by the second embodiment of the present invention; Figure 4 It is a flow chart of a backlight control method for black insertion under a variable refresh rate provided in Embodiment 3 of the present invention; Figure 5 is a current timing diagram of a backlight partition at a second refresh rate provided by Embodiment 3 of the present invention; Figure 6 It is a flow chart of a backlight control method for black insertion under a variable refresh rate provided by a fourth embodiment of the present invention; Figure 7 This is a current timing diagram of a backlight partition at a second refresh rate provided by a fourth embodiment of the present invention; Figure 8 It is a flowchart of a backlight control method for black insertion under a variable refresh rate provided by Embodiment 5 of the present invention; Fig. 9 This is a current timing diagram of a backlight partition at a second refresh rate provided by Embodiment 5 of the present invention; Fig.10 It is a structural schematic diagram of a backlight control device for black insertion at a variable refresh rate provided by Embodiment 6 of the present invention; Fig.11It is a structural diagram of a computer device provided in Embodiment 7 of the present invention. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] It should be understood that the order of execution of the steps in the following embodiments does not imply a precedence 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.

[0014] like Figure 1 As shown, it is a flow chart of a backlight control method for black insertion under a variable refresh rate provided in Embodiment 1 of the present invention, which may include the following steps: Step S101: when a backlight partition of a display panel switches from a first refresh rate to a second refresh rate, a first current variation parameter in a first display period at the first refresh rate and a first average current at the first refresh rate are obtained.

[0015] In this embodiment, the backlight partition may 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, and 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 may be 180 Hz, 120 Hz, 75 Hz, and 60 Hz, etc. The vertical synchronization signal period of the backlight partition at the first refresh frequency is divided to obtain a first black insertion period, a first display period, and a first balance period. The first black insertion period is used to perform a black insertion operation to achieve a black insertion effect on the display screen. The first display period is used for frame display. The first balance period is used to adjust the brightness consistency of pixels in the pixel partition. The first current change parameter may refer to the current parameter value of the actual output in the first display period. The first current change parameter may include the starting current, the intermediate current, the number of current changes, and the current change amount of the first display period, etc. The first average current may refer to the average value of the currents of the first black insertion period, the first display period, and the first balance period at the first refresh rate.

[0016] Specifically, when any backlight partition switches from the first refresh rate to the second refresh rate, the first current change parameter is obtained, and the average current of the first display period is obtained based on the first current change parameter, and the brightness current of the first black insertion period is obtained. The brightness current of the first balance period is obtained based on the length of the first black insertion period and the brightness current, and the length and average current of the first display period. The first average current is obtained based on 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.

[0017] 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, in combination with the first current variation parameter, a second current variation parameter for controlling the second display period is generated.

[0018] In this embodiment, the vertical synchronization signal period of the backlight partition at the second refresh frequency is divided to obtain a second black insertion period, a second display period and a second balance period. The second black insertion period is used to perform a black insertion operation to achieve a black insertion effect on the display screen. The second display period is used to perform frame display. The second balance period is used to adjust the brightness consistency of pixels in the pixel partition. The total average current may refer to the current average value of the second black insertion period and the second display period. The second current change parameter may refer to a parameter value for controlling the current output in the second display period. The second current change parameter may include the starting current, intermediate current, number of current changes and current change amount of the second display period.

[0019] Specifically, while 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, intermediate current, number of current changes and current change amount of the first display period in the first current change parameter are adjusted to generate a second current change parameter for controlling the second display period.

[0020] Step S103: generating a third current variation parameter for controlling the second balancing period according to the average current in the second balancing period in the second refresh rate being equal to the first average current.

[0021] Step S104: controlling the current output in the second display period according to the second current variation parameter, and controlling the current output in the second balancing period according to the third current variation parameter.

[0022] In this embodiment, the third current variation parameter may refer to a parameter value for controlling the current output during the second balancing period, and the third current variation parameter may include the brightness current output during the second balancing period.

[0023] Specifically, while ensuring that the average current of the second balancing period is equal to the first average current, a third current change parameter for controlling the second balancing period is generated based on the brightness current of the second black insertion period and the second current change parameter of the second display period, and the current output of the second display period is controlled based on the second current change parameter, and the current output of the second balancing period is controlled based on the third current change parameter.

[0024] Optionally, the present invention can be applied to direct current (DC) dimming and pulse width modulation (PWM) dimming scenarios. In the application scenario of DC dimming, the current size at the second refresh rate can be directly and dynamically adjusted in combination with the actual current change parameters at the first refresh rate to achieve brightness adjustment, that is, when the current increases, the brightness increases, and when the current decreases, the brightness decreases; in the application scenario of PWM dimming, the duty cycle at the second refresh rate can be dynamically adjusted in combination with the actual current change parameters at the first refresh rate to achieve brightness adjustment, that is, when the duty cycle increases, the brightness increases, and when the duty cycle decreases, the brightness decreases.

[0025] In this embodiment, when only a single frame is executed at one refresh rate and switched to another refresh rate, since the current deviation only exists between single frames corresponding to two adjacent refresh rates, it usually does not have a significant impact on the brightness after switching; when multiple frames are executed continuously 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 multiple frames has a greater impact on the brightness after switching. The present application dynamically adjusts the current output at the second refresh rate based on 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 balance period are consistent with the first average current at the first refresh rate, combined with the actual current change parameters at the first refresh rate, thereby avoiding the display flickering caused by excessive brightness change when switching to another refresh rate after executing multiple frames continuously at one refresh rate due to the existence of accumulated current deviation of multiple frames, thereby improving the consistency of picture brightness at different refresh rates and enhancing the visual experience.

[0026] like Figure 2 As shown, it is a flow chart of a backlight control method for black insertion under a variable refresh rate provided in Embodiment 2 of the present invention. In the above step S101, obtaining a first current change parameter in a first display period at a first refresh rate and a first average current at the first refresh rate may include the following steps: Step S201: obtaining an average current in a first display period according to a starting current, an intermediate current and the number of current changes in a first current change parameter.

[0027] Step S202: Obtain the brightness current of the first black insertion period in the first refresh rate, and obtain the brightness current of the first balancing period in the first refresh rate according to the duration and brightness current of the first black insertion period and the duration and average current of the first display period.

[0028] Step S203: obtaining a first average current 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 balancing period.

[0029] In this embodiment, the starting current may refer to the current value corresponding to the starting time point of the first display period, the intermediate current may refer to the current value corresponding to the intermediate time point within the first display period, the number of current changes may refer to the number of current changes from the starting current to the intermediate current, the current change amount may refer to the amount of each current change, and the brightness current may refer to the current value output to maintain a specific brightness level.

[0030] For example, Figure 3 The figure shows a current timing diagram of a backlight partition at the first refresh rate provided by the second embodiment of the present invention. The vertical synchronization signal period of the backlight partition at the first refresh rate is divided into a first black insertion period, a first display period and a first balance period. The durations of the corresponding periods are T1, T2 and T3 respectively. The brightness current of the first black insertion period is I1, the starting current of the first display period is I2-1, the middle current is I2-2, and the brightness current of the first balance period is I3. For the brightness current I1 of the first black insertion period, there is ; For the first display period, in the process of changing from the starting current to the intermediate current, the current change amount gradually increases, and it increases 3 times to reach the intermediate current. It can be determined that the number of current changes is 3 times. In the first display period, starting from the starting current I2-1, the current change amount gradually increases, and after 3 changes, it reaches the intermediate current I2-2. After maintaining for a period of time, the current change amount gradually decreases, and after 3 changes, it reaches the starting current I2-1.

[0031] Specifically, first, the average current of the first display period is obtained according to the starting current, the intermediate current and the number of current changes in the first current change parameter, and then, the brightness current of the first balance period is obtained according to the duration and brightness current of the first black insertion period, and the duration and average current of the first display period. Finally, 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 are averaged to obtain the first average current.

[0032] The calculation formula of the brightness current in the first balancing period can be: , wherein I3 is the brightness current of the first balancing 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.

[0033] In this embodiment, the brightness current of the first balance 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 parameter, and the brightness current of the first black insertion period. This provides actual current parameters for adjusting the current output at the second refresh rate during refresh rate switching, further improves the accuracy of the current output at the second refresh rate, and improves the consistency of picture brightness at different refresh rates.

[0034] like Figure 4 As shown, it is a flow chart of a backlight control method for black insertion under a variable refresh rate provided in Embodiment 3 of the present invention. In the above 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, combined with the first current change parameter, generating the second current change parameter for controlling the second display period may include the following steps: Step S401: According to the total average current being equal to the first average current, the starting current and the middle current in the first current variation parameter are updated respectively to obtain an updated starting current and an updated middle current.

[0035] Step S402: updating the starting current to be the starting current of the second display period, and updating the middle current to be the middle current of the second display period.

[0036] Step S403: forming a second current variation parameter by combining the initial current and the middle current of the second display period, and the current variation times and the current variation amount in the first current variation parameter.

[0037] In this embodiment, updating the starting current may refer to a current after the starting current in the first variation parameter is updated, and updating the intermediate current may refer to a current after the intermediate current in the first variation parameter is updated.

[0038] For example, Figure 5 As shown, it is a current timing diagram of a backlight partition at the second refresh rate provided by the third embodiment of the present invention.

[0039] Note: What is displayed at the first refresh rate is the last frame after multiple consecutive frames at the first refresh rate. There is at least one frame belonging to the first refresh rate before the first refresh rate. For the sake of simplicity of the illustration, the previous frames are not shown in the illustration; similarly, what is displayed at the second refresh rate is the first frame at the second refresh rate. There may be frames belonging to the second refresh rate after the second refresh rate. For the sake of simplicity of the illustration, the following frames are not shown in the illustration.

[0040] like Figure 5 As shown, the backlight partition is divided into a second black insertion period, a second display period and a second balance period in the vertical synchronization signal cycle of the second refresh rate, and the durations of the corresponding segments are T1', T2' and T3', respectively. Under the condition 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 an updated starting current I2-1' and an updated intermediate current I2-2', and the updated starting current I2-1' is the starting current of the second display period, and the updated intermediate current is the intermediate current of the second display period. The starting current and the intermediate current of the second display period, as well as the number of current changes and the current change amount in the first current change parameter, are combined to form a second current change parameter; For the second display period, starting from the starting current I2-1', the current gradually increases according to the current change amount, and reaches the intermediate current I2-2' after 3 changes. After maintaining for a period of time, the current gradually decreases according to the current change amount, and reaches the starting current I2-1' after 3 changes.

[0041] 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, thereby avoiding 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, thereby improving the consistency of picture brightness at different refresh rates and enhancing the visual experience.

[0042] like Figure 6 As shown, it is a flow chart of a backlight control method for black insertion under a variable refresh rate provided by a fourth embodiment of the present invention. In the above 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, combined with the first current change parameter, a second current change parameter for controlling the second display period is generated, and the following steps may also be included: Step S601: According to the total average current being equal to the first average current, the starting current and the current variation in the first current variation parameter are updated respectively to obtain an updated starting current and an updated current variation.

[0043] Step S602: updating the starting current to the starting current of the second display period, and updating the current variation to the current variation of the second display period.

[0044] Step S603: forming a second current variation parameter by combining the starting current and the current variation amount of the second display period, and the intermediate current and the number of current variations in the first current variation parameter.

[0045] Optionally, in the above 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, combined with the first current change parameter, generating the second current change parameter for controlling the second display period may also include: According to the total average current being equal to the first average current, the starting current and the number of current changes in the first current change parameter are updated respectively to obtain an updated starting current and an updated number of current changes; updating the starting current to the starting current of the second display period, and updating the number of current changes to the number of current changes of the second display period; The update start current and the current change times of the second display period, as well as the intermediate current and the current change amount in the first current change parameter, are used to form a second current change parameter.

[0046] In this embodiment, the updated current variation may refer to the current after the current variation in the first current variation parameter is updated, and the updated current variation times may refer to the times after the current variation in the first current variation parameter is updated.

[0047] For example, Figure 7 As shown, it is a current timing diagram of a backlight partition at the second refresh rate provided in 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 balance period, and the corresponding durations of each segment are T1", T2" and T3", respectively. Under the condition of ensuring that the total average current is equal to the first average current, for the starting current I2-1 in the first current change parameter, an updated starting current I2-1" is obtained, and the number of current changes in the first display period is updated from 3 times to 2 times, and the updated starting current I2-1" is the starting current of the second display period, and the updated current change number 2 is the current change number of the second display period, and the starting current and current change number of the second display period, as well as the intermediate current and current change amount in the first current change parameter, are combined to form the second current change parameter.

[0048] For the second display period, starting from the starting current I2-1", the current gradually increases according to the current change, and reaches the intermediate current I2-2 after 2 changes. After maintaining for a period of time, the current gradually decreases according to the current change, and reaches the starting current I2-1" after 2 changes.

[0049] 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, thereby avoiding 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, thereby improving the consistency of picture brightness at different refresh rates and enhancing the visual experience.

[0050] like Figure 8 As shown, it is a flow chart of a backlight control method for black insertion under a variable refresh rate provided by Embodiment 5 of the present invention. In the above 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, combined with the first current change parameter, a second current change parameter for controlling the second display period is generated, and the following steps may also be included: Step S801: updating 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; Step S802: updating the current change times to the current change times of the second display period, setting the starting current in the first current change parameter to the middle current of the second display period, and setting the middle current in the first current change parameter to the starting current of the second display period; Step S803: the starting current, the middle current and the number of current changes in the second display period, and the current change amount in the first current change parameter are combined to form a second current change parameter.

[0051] Optionally, in the above 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, combined with the first current change parameter, generating a second current change parameter for controlling the second display period, further includes: According to the total average current being equal to the first average current, updating the current variation in the first current variation parameter to obtain an updated current variation; The updated current variation is the current variation of the second display period, the starting current in the first current variation parameter is the middle current of the second display period, and the middle current in the first current variation parameter is the starting current of the second display period; The starting current, the middle current and the current variation amount of the second display period, and the number of current variations in the first current variation parameter are combined to form a second current variation parameter.

[0052] like Fig. 9 As shown, it is a current timing diagram of a backlight partition at the second refresh rate provided by 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 balance period, and the corresponding durations of each segment are T1'", T2'" and T3'", respectively. Under the condition of ensuring that the total average current is equal to the first average current, the number of current changes in the first display period is updated from 3 times to 2 times, the starting current I2-1 in the first current change parameter is the middle current of the second display period, the middle current I2-2 in the first current change parameter is the starting current of the second display period, the number of current changes is updated 2 times to the number of current changes in the second display period, the starting current, middle current and current change times of the second display period, and the current change amount in the first current change parameter are combined to form the second current change parameter.

[0053] For the second display period, starting from the starting current I2-2, the current gradually decreases according to the current change, and reaches the intermediate current I2-1 after 2 changes. After maintaining for a period of time, the current gradually increases according to the current change, and reaches the starting current I2-2 after 2 changes.

[0054] 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, thereby avoiding 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, thereby improving the consistency of picture brightness at different refresh rates and enhancing the visual experience.

[0055] like Fig.10 As shown, it is a structural schematic diagram of a backlight control device for inserting black at a variable refresh rate provided in Embodiment 6 of the present application. The backlight control device for inserting black at a variable refresh rate corresponds one-to-one to the backlight control method for inserting black at a variable refresh rate described above. The backlight control device for inserting black at a variable refresh rate includes a first acquisition module 1001, a first adjustment module 1002, a second adjustment module 1003 and a control module 1004. Each functional module is described in detail as follows: An acquisition module 1001 is used to acquire a first current change parameter in a first display period at the first refresh rate and a first average current at the first refresh rate when a backlight partition of a display panel switches from a first refresh rate to a second refresh rate; A first adjustment module 1002, 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 combining the first current variation parameter; A second adjustment module 1003, configured to generate a third current change parameter for controlling the second balancing period according to that the average current in the second balancing period in the second refresh rate is equal to the first average current; The control module 1004 is used to control the current output in the second display period according to the second current change parameter, and to control the current output in the second balance period according to the third current change parameter.

[0056] Optionally, the acquisition module 1001 includes: a first calculation unit, configured to obtain an average current in the first display period according to a starting current, an intermediate current and a number of current changes in the first current change parameter; a second calculation unit, configured to obtain a brightness current in a first black insertion period in the first refresh rate, and obtain a brightness current in a first balancing period in the first refresh rate according to a duration and a brightness current of the first black insertion period, and a duration and an average current of the first display period; The third calculation unit is used to obtain the first average current 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.

[0057] Optionally, the first adjustment module 1002 includes: A first updating unit, configured to update a starting current and an intermediate current in the first current variation parameter respectively according to the total average current being equal to the first average current, to obtain an updated starting current and an updated intermediate current; a first determining unit, configured to set the update start current to be the start current of the second display period, and set the update middle current to be the middle current of the second display period; The first forming unit is used to form the second current variation parameter by using the starting current and the middle current of the second display period, and the number of current variation and the current variation amount in the first current variation parameter.

[0058] Optionally, the first adjustment module 1002 further includes: A second updating unit, configured to update the starting current and the current variation in the first current variation 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 variation; a second determining unit, configured to set the update start current to be the start current of the second display period, and set the update current change to be the current change of the second display period; The second forming unit is used to form the second current change parameter by using the starting current and the current change amount of the second display period, and the intermediate current and the number of current changes in the first current change parameter.

[0059] Optionally, the first adjustment module 1002 further includes: a third updating unit, configured to update the starting current and the number of current changes 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 number of current changes; a third determining unit, configured to set the update start current to be the start current of the second display period, and set the update current change times to be the current change times of the second display period; The third forming unit is used to form the second current change parameter by using the update start 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.

[0060] Optionally, the first adjustment module 1002 further includes: A fourth updating unit, configured to update the number of current changes in the first current change parameter according to the total average current being equal to the first average current, to obtain an updated number of current changes; a fourth determining unit, configured to set the update current change times as the current change times in the second display period, set the starting current in the first current change parameter as the middle current in the second display period, and set the middle current in the first current change parameter as the starting current in the second display period; The fourth forming unit is used to form the second current change parameter by using the starting current, the middle current and the number of current changes in the second display period and the current change amount in the first current change parameter.

[0061] Optionally, the first adjustment module 1002 further includes: A fifth updating unit, configured to update the current variation in the first current variation parameter according to the total average current being equal to the first average current, to obtain an updated current variation; a fifth determining unit, configured to set the updated current variation as the current variation of the second display period, set the starting current in the first current variation parameter as the middle current of the second display period, and set the middle current in the first current variation parameter as the starting current of the second display period; The fifth forming unit is used to form the second current change parameter by using the starting current, the middle current and the current change amount of the second display period and the number of current changes in the first current change parameter.

[0062] For the specific definition of the backlight control device for inserting black at a variable refresh rate, please refer to the definition of the backlight control method for inserting black at a variable refresh rate above, which will not be repeated here. Each module in the above-mentioned backlight control device for inserting black at a variable refresh rate can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0063] Fig.11 This is a schematic diagram of the structure of a computer device provided in Embodiment 7 of the present invention. Fig.11 As shown, the computer device of this embodiment includes: at least one processor ( Fig.11 Only one is shown), a memory, and a computer program stored in the memory and executable on at least one processor, wherein when the processor executes the computer program, the steps in any of the above-mentioned backlight control method embodiments for black insertion under variable refresh rate are implemented.

[0064] The computer device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that Fig.11 This is merely an example of a computer device and does not constitute a limitation on the computer device. The computer device may include more or fewer components than those shown in the figure, or a combination of certain components, or different components. For example, it may also include a network interface, a display screen, and an input device.

[0065] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0066] The memory includes a readable storage medium, an internal memory, etc., wherein the internal memory may be the memory of a computer device, and the internal memory provides an environment for the operation of the operating system and computer-readable instructions in the readable storage medium. The readable storage medium may be a hard disk of a computer device, and in other embodiments, it may also be an external storage device of the computer device, for example, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the computer device. Further, the memory may also 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 boot loader (BootLoader), data, and other programs, such as the program code of a computer program, etc. The memory may also be used to temporarily store data that has been output or is to be output.

[0067] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, 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. The functional units and modules in the embodiment can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention. The specific working process of the units and modules in the above-mentioned device can refer to the corresponding process in the above-mentioned method embodiment, which will not be repeated here. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying computer program code, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0068] The present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by a computer program product. When the computer program product runs on a computer device, the computer device can implement the steps in the above-mentioned method embodiment when executing.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0071] In the embodiments provided by the present invention, it should be understood that the disclosed devices / computer equipment and methods can be implemented in other ways. For example, the device / computer equipment embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0072] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A backlight control method for black insertion under variable refresh rate, characterized in that: include: When a backlight partition of the display panel switches from a first refresh rate to a second refresh rate, obtaining a first current change parameter in a first display period at the first refresh rate and a first average current at the first refresh rate; 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, combined with the first current change parameter, a second current change parameter for controlling the second display period is generated; generating a third current variation parameter for controlling the second balancing period according to that the average current in the second balancing period in the second refresh rate is equal to the first average current; The current output in the second display period is controlled according to the second current variation parameter, and the current output in the second balance period is controlled according to the third current variation parameter.

2. The backlight control method for black insertion under variable refresh rate as claimed in claim 1, characterized in that: The obtaining of a first current change parameter in a first display period at the first refresh rate and a first average current at the first refresh rate includes: Obtaining an average current in the first display period according to the starting current, the intermediate current and the number of current changes in the first current change parameter; Obtaining the brightness current of the first black insertion period in the first refresh rate, and obtaining the brightness current of the first balancing period in the first refresh rate according to the duration and brightness current of the first black insertion period, and the duration and average current of the first display period; 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.

3. The backlight control method for black insertion under variable refresh rate as claimed in claim 1, characterized in that: The method of generating 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 combining the first current variation parameter comprises: According to the total average current being equal to the first average current, respectively updating the starting current and the middle current in the first current variation parameter to obtain an updated starting current and an updated middle current; The updating start current is set as the starting current of the second display period, and the updating middle current is set as the middle current of the second display period; The starting current and the middle current of the second display period, and the number of current changes and the current change amount in the first current change parameter are used to form the second current change parameter.

4. The backlight control method for black insertion under variable refresh rate as claimed in claim 1, characterized in that: The method further comprises: generating 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 combining the first current variation parameter. According to the total average current being equal to the first average current, respectively updating the starting current and the current variation in the first current variation parameter to obtain an updated starting current and an updated current variation; The update start current is set as the start current of the second display period, and the update current change is set as the current change of the second display period; The starting current and the current change amount of the second display period, and the intermediate current and the number of current changes in the first current change parameter are used to form the second current change parameter.

5. The backlight control method for black insertion under variable refresh rate as claimed in claim 1, characterized in that: The method further comprises: generating 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 combining the first current variation parameter. According to the total average current being equal to the first average current, respectively updating the starting current and the number of current changes in the first current change parameter to obtain an updated starting current and an updated number of current changes; The update start current is set to the start current of the second display period, and the update current change times is set to the current change times of the second display period; The update start current and the current change times of the second display period, as well as the intermediate current and the current change amount in the first current change parameter, are used to form the second current change parameter.

6. The backlight control method for black insertion under variable refresh rate as claimed in claim 1, characterized in that: The method further comprises: generating 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 combining the first current variation parameter. According to the total average current being equal to the first average current, updating the number of current changes in the first current change parameter to obtain an updated number of current changes; The update current change times are the current change times of the second display period, the starting current in the first current change parameter is the middle current of the second display period, and the middle current in the first current change parameter is the starting current of the second display period; The starting current, the middle current and the number of current changes in the second display period, as well as the current change amount in the first current change parameter, are used to form the second current change parameter.

7. The backlight control method for black insertion under variable refresh rate as claimed in claim 1, characterized in that: The method further comprises: generating 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 combining the first current variation parameter. According to the total average current being equal to the first average current, updating the current variation in the first current variation parameter to obtain an updated current variation; The update current variation is the current variation of the second display period, the starting current in the first current variation parameter is the middle current of the second display period, and the middle current in the first current variation parameter is the starting current of the second display period; The starting current, the middle current and the current variation amount of the second display period, and the number of current variations in the first current variation parameter are used to form the second current variation parameter.

8. A backlight control device for black insertion under variable refresh rate, characterized in that: include: An acquisition module, configured to acquire, when a backlight partition of a display panel switches from a first refresh rate to a second refresh rate, a first current change parameter in a first display period at the first refresh rate and a first average current at the first refresh rate; a first adjustment module, 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 combining the first current variation parameter; a second adjustment module, configured to generate a third current change parameter for controlling the second balancing period according to that the average current in the second balancing period in the second refresh rate is equal to the first average current; A control module is used to control the current output in the second display period according to the second current change parameter, and to 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: When the processor executes the computer program, the steps of the backlight control method for black insertion under a variable refresh rate as claimed in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the backlight control method for black insertion under a variable refresh rate as claimed in any one of claims 1 to 7 are implemented.

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