Display driving method, apparatus and system therefor, and display device

Abstract

A display driving method, an apparatus and system therefor, and a display device, relating to the technical field of display. The display driving method comprises: acquiring a data write instruction for a current frame of display data, the data write instruction comprising grayscale data information and black frame insertion control information of partitions; and for each partition, on the basis of the grayscale data information, outputting a display driving signal to a corresponding constant current source, and, on the basis of the black frame insertion control information, outputting a black frame insertion control signal to the corresponding constant current source according to a frequency corresponding to the black frame insertion control information, the display driving signal being used to control the constant current source to output a corresponding driving current, and the black frame insertion control signal being used to turn off the constant current source. Outputting the black frame insertion control signal to the corresponding constant current source according to the frequency corresponding to the black frame insertion control information makes the proportion of an effective time period of the black frame insertion control signal of each frame of display data in each partition not differ greatly, so that display brightness is not affected, and the problem of display flickering is avoided.

Description

Display driving methods, devices, systems, and display equipment Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display driving method, apparatus, system, and display device. Background Technology

[0002] Liquid crystal displays (LCDs) are currently the mainstream display devices, widely used in televisions and personal computers. However, due to the low response speed of liquid crystal cells, they are prone to ghosting and image retention.

[0003] A black frame can be added to a single frame of display data to improve ghosting at high frame rates. However, with the increasing demands of Variable Refresh Rate (VRR) displays, this approach significantly impacts display brightness at different frame rates, easily leading to display flickering. Summary of the Invention

[0004] The embodiments of this disclosure provide a display driving method, apparatus, system, and display device to solve the technical problem that adding a black frame to a frame of display data can easily cause display flickering.

[0005] In a first aspect, embodiments of this disclosure provide a display driving method, comprising:

[0006] Obtain the write data command for the display data of the current frame; the write data command includes grayscale data information and black insertion control information for each partition;

[0007] For each partition, a display drive signal is output to the corresponding constant current source based on grayscale data information, and a black insertion control signal is output to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on the black insertion control information.

[0008] Among them, the display drive signal is used to control the output drive current of the constant current source, and the blackout control signal is used to turn off the constant current source.

[0009] In one possible implementation, based on the black insertion control information, a black insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black insertion control information, including:

[0010] In response to the synchronous display update time point of the display update signal, based on the black insertion control information, the black insertion control signal is output to the corresponding constant current source at the frequency corresponding to the black insertion control information.

[0011] Among them, the synchronous display update time point is used to indicate the first predetermined time point after the reception of the current frame display data is completed.

[0012] In one possible implementation, the black insertion control information includes at least one of the following:

[0013] Black insertion start point information; Black insertion start point information is used to indicate the interval between the start time of the black insertion control signal and the synchronous display update time.

[0014] Black insertion duration information; Black insertion duration information is used to indicate the first predetermined duration of the black insertion control signal.

[0015] In one possible implementation, the black insertion control information also includes fixed-frequency black insertion information, which is used to indicate that a black insertion control signal of the first predetermined duration is output at intervals of the second predetermined duration.

[0016] Output black insertion control signals to the corresponding constant current source according to the frequency corresponding to the black insertion control information, including:

[0017] At every second predetermined time interval, a blackout control signal of the first predetermined time is output to the corresponding constant current source.

[0018] In one possible implementation, the drive signal is a pulse width modulation signal and / or an amplitude modulation signal.

[0019] In one possible implementation, the display driver method also includes any of the following:

[0020] When outputting the black insertion control signal to the corresponding constant current source, the display drive signal is synchronously output based on the grayscale data information so that the constant current source continues to receive the display drive signal after the black insertion control signal stops being output.

[0021] When outputting the black insertion control signal to the corresponding constant current source, the output of the display drive signal is stopped. After the black insertion control signal stops being output, the output of the display drive signal to the constant current source continues.

[0022] Secondly, embodiments of this disclosure provide a display driving device, comprising:

[0023] The acquisition module is used to acquire write data instructions for the display data of the current frame; the write data instructions include grayscale data information and black insertion control information for each partition;

[0024] The driver module is used to output display drive signals to the corresponding constant current source for each partition based on grayscale data information, and to output black insertion control signals to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on the black insertion control information.

[0025] Among them, the display drive signal is used to control the output drive current of the constant current source, and the blackout control signal is used to turn off the constant current source.

[0026] Thirdly, embodiments of this disclosure provide a display driving system, including: a constant current module and a display driving module;

[0027] The constant current module includes multiple constant current sources, each of which is connected to a corresponding partition of the display driver module;

[0028] The display driver module is used to obtain write data instructions for the display data of the current frame. The write data instructions include grayscale data information and black insertion control information for each partition. For each partition, a display driver signal is output to the corresponding constant current source based on the grayscale data information, and a black insertion control signal is output to the corresponding constant current source at the frequency corresponding to the black insertion control information based on the black insertion control information. The display driver signal is used to control the constant current source to output the corresponding drive current, and the black insertion control signal is used to turn off the constant current source.

[0029] In one possible implementation, the display driver system also includes:

[0030] The decoding module is used to decode the input data and generate write data instructions and display update signals for each frame of display data; the input data is generated based on preset rules and display data.

[0031] The storage module, connected to the decoding module and the display driver module, is used to store the write data instructions sent by the decoding module for each frame of display data, and to update the display driver module with the write data instructions for the current frame of display data in response to the display update signal sent by the decoding module.

[0032] In one possible implementation, the storage module includes:

[0033] The first data storage area is connected to the decoding module and is used to store the write data instructions sent by the decoding module for each frame of display data.

[0034] The second data storage area, connected to the decoding module and the display driver module, is used to respond to the display update signal sent by the decoding module, obtain the write data instruction for the display data of the current frame from the first data storage area, and update the grayscale data information and black insertion control information of each partition of the display driver module based on the write data instruction.

[0035] Fourthly, embodiments of this disclosure provide a display device, including: a display driving device according to the second aspect or a display driving system according to the third aspect.

[0036] The beneficial effects of the technical solutions provided by the embodiments of this disclosure are:

[0037] The embodiments of this disclosure can obtain write data instructions for the current frame display data. The write data instructions include grayscale data information and black frame insertion control information for each partition. Then, for each partition, a display drive signal can be output to the corresponding constant current source based on the grayscale data information to control the constant current source to output the corresponding drive current, thereby displaying the current frame display data. Based on the black frame insertion control information, a black frame insertion control signal can be output to the corresponding constant current source at a frequency corresponding to the black frame insertion control information to turn off the constant current source. That is, a black frame for a period of time can be inserted into the current frame display data, thereby improving the ghosting phenomenon under high display frame rate.

[0038] Meanwhile, in the embodiments of this disclosure, the black insertion control signal is output to the corresponding constant current source at the frequency corresponding to the black insertion control information. This fixed-frequency black insertion method can make the proportion of the effective black insertion time period of each frame of display data in each partition not much different, and will not affect the display brightness. It can ensure that the brightness difference of different frame frequencies is very small in VRR mode, and avoid the problem of display flicker. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below.

[0040] Figure 1 is a flowchart of a display driving method provided by an embodiment of this disclosure.

[0041] Figure 2 is a timing diagram of a display driving method provided in an embodiment of this disclosure.

[0042] Figure 3 is a schematic diagram of the structure of a display driving device provided in an embodiment of this disclosure.

[0043] Figure 4 is a schematic diagram of the structure of a first display driving system provided in an embodiment of this disclosure.

[0044] Figure 5 is a schematic diagram of the structure of a second display driving system provided in an embodiment of this disclosure.

[0045] Figure 6 is a schematic diagram of the structure of a third display driving system provided in an embodiment of this disclosure.

[0046] Reference numerals: 10-Display driving system; 110-Display driving module; 120-Constant current module; 130-Decoding module; 140-Storage module; 141-First data storage area; 142-Second data storage area; 20-Display driving device; 201-Acquisition module; 202-Driver module. Detailed Implementation

[0047] The embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions of the technical solutions used to explain the embodiments of this disclosure, and do not constitute a limitation on the technical solutions of the embodiments of this disclosure.

[0048] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the terms “comprising” and “including” as used in embodiments of this disclosure mean that the corresponding feature can be implemented as the presented feature, information, data, step, operation, element, and / or component, but do not exclude implementation as other features, information, data, step, operation, element, component, and / or combinations thereof supported by the art. It should be understood that when we say that an element is “connected” or “coupled” to another element, the one element may be directly connected or coupled to the other element, or it may mean that the one element and the other element are connected through an intermediate element. Furthermore, “connected” or “coupled” as used herein may include wireless connection or wireless coupling. The term “and / or” as used herein indicates at least one of the items defined by the term; for example, “A and / or B” indicates implementation as “A,” or implementation as “A,” or implementation as “A and B.”

[0049] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0050] In related technologies, liquid crystal displays (LCDs) are currently the mainstream display devices, widely used in televisions and personal computers. However, due to the low response speed of liquid crystal cells, they are prone to ghosting and image retention.

[0051] To address the ghosting issue in LCD displays, a common black frame insertion technique involves adding a black frame between two data frames, effectively mitigating the ghosting phenomenon. However, this method requires sending multiple data frames, placing certain demands on data bandwidth. Furthermore, with the increasing demands for higher display frame rates and resolutions, data transmission time has been further compressed, while the data volume has increased. Therefore, this technique is no longer suitable for current LCD displays.

[0052] The inventors of this disclosure further discovered that by adding a period of black frames to a single frame of display data, ghosting can be improved while maintaining a high display frame rate. However, with the increasing demands of Variable Refresh Rate (VRR) display modes, this method has a significant impact on display brightness at different frame rates, and in more severe cases, may cause display flickering.

[0053] VRR (Variable Refresh Rate) mode is a technology that allows the screen to dynamically adjust the refresh rate of the image display based on the current game frame rate, thus providing a smoother visual experience. This technology can solve the problem of screen tearing or jittering in games, making the picture more stable and smooth. VRR mode synchronizes the refresh rate of the display device with the game frame rate, avoiding the situation where the previous frame and the next frame of the game picture appear on the screen at the same time, thereby reducing screen tearing.

[0054] The display driving method, apparatus, system, and display device disclosed herein are intended to solve the above-mentioned technical problems of the prior art.

[0055] The technical solutions of this disclosure and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, learned from, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0056] Referring to Figure 1, an embodiment of this disclosure provides a flowchart of a display driving method. As shown in Figure 1, the display driving method includes steps S101 to S102.

[0057] S101. Obtain the write data instruction for the display data of the current frame; the write data instruction includes grayscale data information and black insertion control information for each partition.

[0058] According to embodiments of this disclosure, grayscale data information is used to output a display drive signal to the corresponding constant current source, so that the constant current source outputs the corresponding drive current, which can display the current frame display data.

[0059] The black frame insertion control information can insert a black frame for a certain period of time into the current frame display data. The black frame insertion control information is used to output a black frame insertion control signal to the corresponding constant current source. The duration of the black frame insertion control signal is a first predetermined duration, thereby realizing the insertion of a black frame for a certain period of time into the current frame display data.

[0060] S102. For each partition, output a display drive signal to the corresponding constant current source based on grayscale data information, and output a black insertion control signal to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on black insertion control information.

[0061] Among them, the display drive signal is used to control the output drive current of the constant current source, and the blackout control signal is used to turn off the constant current source.

[0062] According to embodiments of this disclosure, each partition is equivalent to a data channel, through which grayscale data information and black insertion control information of each partition can be output. The black insertion control signal is used to turn off the constant current source, at which point the constant current source cannot receive display drive signals.

[0063] According to embodiments of this disclosure, black insertion control information can be used to characterize the output frequency of black insertion control signal, or each partition can have a pre-stored frequency corresponding to the black insertion control information, thereby achieving fixed-frequency black insertion and outputting black insertion control signal at a certain frequency.

[0064] Based on the above steps S101 to S102, the display driving method of the present disclosure can obtain a write data instruction for the display data of the current frame. The write data instruction includes grayscale data information and black frame insertion control information for each partition. Then, for each partition, a display driving signal can be output to the corresponding constant current source based on the grayscale data information to control the constant current source to output the corresponding driving current, thereby displaying the display data of the current frame. Based on the black frame insertion control information, a black frame insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black frame insertion control information to turn off the constant current source. That is, a black frame for a period of time can be inserted into the display data of the current frame, thereby improving the ghosting phenomenon under high display frame rate.

[0065] Meanwhile, the display driving method of the embodiments of this disclosure outputs a black insertion control signal to the corresponding constant current source at a frequency corresponding to the black insertion control information. This fixed-frequency black insertion method ensures that the proportion of the effective black insertion time period for each frame of display data in each partition does not differ significantly, thus not affecting the display brightness. This guarantees that the brightness difference between different frame rates is minimal in VRR mode, avoiding display flickering. Therefore, the embodiments of this disclosure can improve the problem of inconsistent display brightness or even display flickering in VRR mode, and can also improve the ghosting phenomenon.

[0066] The embodiments of this disclosure relate to the field of LED (Light Emitting Diode) display technology, and involve inserting black bars into each display data frame at a certain frequency to improve the problem of inconsistent display brightness or even display flickering in VRR mode, while also reducing ghosting. The display driving method provided by the embodiments of this disclosure can be applied to various liquid crystal display devices.

[0067] In some embodiments, step S102, based on the black insertion control information, outputs a black insertion control signal to the corresponding constant current source at a frequency corresponding to the black insertion control information, including:

[0068] In response to the synchronous display update time point of the display update signal, based on the black insertion control information, the black insertion control signal is output to the corresponding constant current source at the frequency corresponding to the black insertion control information.

[0069] Among them, the synchronous display update time point is used to indicate the first predetermined time point after the reception of the current frame display data is completed.

[0070] The embodiments of this disclosure use the synchronous display update time point as a fixed frequency reference time point. At each synchronous display update time point, the black insertion control signal is output to the corresponding constant current source according to the frequency corresponding to the black insertion control information.

[0071] In some embodiments, the black insertion control information includes at least one of the following:

[0072] Black insertion start point information; Black insertion start point information is used to indicate the interval between the start time of the black insertion control signal and the synchronous display update time.

[0073] Black insertion duration information; Black insertion duration information is used to indicate the first predetermined duration of the black insertion control signal.

[0074] Specifically, the first predetermined duration is the effective time of the black insertion control signal, during which the black insertion control signal is effective.

[0075] In some embodiments, the black insertion control information further includes fixed-frequency black insertion information, which is used to indicate that a black insertion control signal of the first predetermined duration is output at intervals of the second predetermined duration.

[0076] Output black insertion control signals to the corresponding constant current source according to the frequency corresponding to the black insertion control information, including:

[0077] At every second predetermined time interval, a blackout control signal of the first predetermined time is output to the corresponding constant current source.

[0078] According to embodiments of this disclosure, the fixed-frequency black insertion information provides the interval time between two adjacent black insertion control signals, which is equivalent to providing the frequency corresponding to the black insertion control information. The fixed-frequency black insertion information is the interval at which a black insertion control signal is output, corresponding to the black insertion start point information and black insertion duration information.

[0079] As an example, the black insertion control information includes black insertion start information, black insertion duration information, and fixed frequency black insertion information. The black insertion start, black insertion duration, and fixed frequency black insertion duration can all be set uniformly or independently for each partition. Different options can be selected and set according to different schemes.

[0080] In some embodiments, the display drive signal is a pulse width modulation signal and / or an amplitude modulation signal.

[0081] According to embodiments of this disclosure, pulse width modulation can be an analog control method that modulates the bias of the transistor base or MOSFET gate according to the change of the corresponding load, thereby changing the conduction time of the transistor or MOSFET and thus changing the output of the switching power supply.

[0082] According to embodiments of this disclosure, an amplitude modulation (AM) signal is defined as a signal in which the amplitude of the carrier wave changes linearly with the magnitude of the modulating signal.

[0083] In some embodiments, the display driving method further includes any one of the following:

[0084] When outputting the black insertion control signal to the corresponding constant current source, the display drive signal is synchronously output based on the grayscale data information so that the constant current source continues to receive the display drive signal after the black insertion control signal stops being output.

[0085] When outputting the black insertion control signal to the corresponding constant current source, the output of the display drive signal is stopped. After the black insertion control signal stops being output, the output of the display drive signal to the constant current source continues.

[0086] In practical applications, when the embodiments of this disclosure output the black insertion control signal to the corresponding constant current source, the constant current source is in a closed state and does not receive the display drive signal. However, the display drive signal can be output synchronously according to the timing sequence, but the constant current source does not receive it. After the black insertion control signal stops outputting, the constant current source continues to receive the display drive signal at the current moment.

[0087] The inventors of this disclosure discovered through research that, in VRR mode, if the difference in the effective black insertion time period between displaying the Nth frame and the N+1th frame is significant, it can easily lead to large brightness differences during normal display, affecting the display effect. The display driving method of the embodiments of this disclosure can avoid the above-mentioned problem.

[0088] Referring to Figure 2, an embodiment of this disclosure provides a display timing diagram of a display driving method. As shown in Figure 2, the Nth frame and the (N+1)th frame of chip data are display data. Partition 0, partition 1, and partition 2 each correspond to a partition. Displaying the (N-1)th frame, displaying the Nth frame, and displaying the (N+1)th frame are respectively done by displaying each frame as the current frame display data. The black insertion length is the duration of the black insertion control signal, and the black insertion start point of partition 2 is the start time point of the black insertion control signal.

[0089] Referring to Figure 2, based on the input data, the black insertion start point for partition 0 is 0µs, the black insertion start point for partition 1 is 100µs, and the black insertion start point for partition 2 is 200µs. The black insertion duration is uniformly 200µs, and the fixed-frequency black insertion duration is uniformly 450µs. Taking the synchronous display update point as the origin of the coordinate system, the unit is µs: First black insertion: The effective time period of the black insertion control signal for partition 0 is [0, 200], that is, [the black insertion start point of partition 0, the black insertion start point of partition 0 + the black insertion duration]; the effective time period of the black insertion control signal for partition 1 is [100, 300], that is, [the black insertion start point of partition 1, the black insertion start point of partition 1 + the black insertion duration]; the effective time period of the black insertion control signal for partition 2 is [200, 400], that is, [the black insertion start point of partition 2, the black insertion start point of partition 2 + the black insertion duration].

[0090] Second black insertion: The effective time period of the black insertion control signal for partition 0 is [450, 650], that is, [partition 0 black insertion start point + fixed frequency black insertion duration × 1, partition 0 black insertion start point + black insertion duration + fixed frequency black insertion duration × 1]; the effective time period of the black insertion control signal for partition 1 is [550, 750], that is, [partition 1 black insertion start point + fixed frequency black insertion duration × 1, partition 1 black insertion start point + black insertion duration + fixed frequency black insertion duration × 1]; the effective time period of the black insertion control signal for partition 2 is [650, 850], that is, [partition 2 black insertion start point + fixed frequency black insertion duration × 1, partition 2 black insertion start point + black insertion duration + fixed frequency black insertion duration × 1].

[0091] The Nth black insertion: The effective time period of the black insertion control signal for partition 0 is [450, 650], that is, [the black insertion start point of partition 0 + the fixed frequency black insertion duration × (N-1), the black insertion start point of partition 0 + the black insertion duration + the fixed frequency black insertion duration × (N-1)], the effective time period of the black insertion control signal for partition 1 is [550, 750], that is, [the black insertion start point of partition 1 + the fixed frequency black insertion duration × (N-1), the black insertion start point of partition 1 + the black insertion duration + the fixed frequency black insertion duration × (N-1)], the effective time period of the black insertion control signal for partition 2 is [650, 850], that is, [the black insertion start point of partition 2 + the fixed frequency black insertion duration × (N-1), the black insertion start point of partition 2 + the black insertion duration + the fixed frequency black insertion duration × (N-1)].

[0092] Therefore, in VRR mode, even if the frame rates of two display data frames differ significantly, the display driving method of the embodiments of this disclosure can still ensure that the proportion of the effective black insertion time period of each display data frame is consistent and will not affect the display brightness.

[0093] Referring to Figure 3, an embodiment of this disclosure provides a schematic diagram of the structure of a display driving device 20. As shown in Figure 3, the display driving device 20 includes: an acquisition module 201 and a driving module 202.

[0094] The acquisition module 201 is used to acquire write data instructions for the display data of the current frame; the write data instructions include grayscale data information and black insertion control information for each partition.

[0095] The driver module 202 is used to output a display drive signal to the corresponding constant current source based on grayscale data information for each partition, and to output a black insertion control signal to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on the black insertion control information.

[0096] Among them, the display drive signal is used to control the output drive current of the constant current source, and the blackout control signal is used to turn off the constant current source.

[0097] According to embodiments of this disclosure, the driving module 202 is further configured to, in response to the synchronous display update time point of the display update signal, output a black insertion control signal to the corresponding constant current source at a frequency corresponding to the black insertion control information. The synchronous display update time point represents a first predetermined time point after the reception of the current frame display data is completed.

[0098] According to an embodiment of this disclosure, the driving module 202 is further configured to output a blackout control signal of a first predetermined duration to the corresponding constant current source at intervals of a second predetermined duration.

[0099] According to embodiments of this disclosure, the driving module 202 is further configured to perform any of the following:

[0100] When outputting the black insertion control signal to the corresponding constant current source, the display drive signal is synchronously output based on the grayscale data information so that the constant current source continues to receive the display drive signal after the black insertion control signal stops being output.

[0101] When outputting the black insertion control signal to the corresponding constant current source, the output of the display drive signal is stopped. After the black insertion control signal stops being output, the output of the display drive signal to the constant current source continues.

[0102] The apparatus of the embodiments of this disclosure can execute the methods provided in the embodiments of this disclosure, and their implementation principles are similar. The actions performed by each module in the apparatus of each embodiment of this disclosure correspond to the steps in the methods of each embodiment of this disclosure. For detailed functional descriptions of each module of the apparatus, please refer to the descriptions in the corresponding methods shown above, which will not be repeated here.

[0103] Referring to Figure 4, an embodiment of this disclosure provides a schematic diagram of the structure of a first display driving system 10. As shown in Figure 4, the display driving system 10 includes a constant current module 120 and a display driving module 110.

[0104] The constant current module 120 includes multiple constant current sources, each of which is connected to a corresponding partition of the display driver module 110.

[0105] The display driver module 110 is used to acquire write data instructions for the display data of the current frame; the write data instructions include grayscale data information and black insertion control information for each partition; for each partition, a display driver signal is output to the corresponding constant current source based on the grayscale data information, and a black insertion control signal is output to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on the black insertion control information; wherein, the display driver signal is used to control the constant current source to output the corresponding drive current, and the black insertion control signal is used to turn off the constant current source.

[0106] Alternatively, the constant current module 120 can display the current waveform corresponding to the drive signal output. The display drive module 110 has multiple data channels, each data channel being equivalent to a partition.

[0107] The display driving system 10 of the embodiments of this disclosure can acquire a write data instruction for the display data of the current frame. The write data instruction includes grayscale data information and black frame insertion control information for each partition. Then, for each partition, a display driving signal is output to the corresponding constant current source based on the grayscale data information to control the constant current source to output the corresponding driving current, so as to display the display data of the current frame. Based on the black frame insertion control information, a black frame insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black frame insertion control information to turn off the constant current source. That is, a black frame for a period of time can be inserted into the display data of the current frame, thereby improving the ghosting phenomenon under high display frame rate.

[0108] Meanwhile, the display driving system 10 of the embodiments of this disclosure outputs black insertion control signals to the corresponding constant current source at a frequency corresponding to the black insertion control information. This fixed-frequency black insertion method ensures that the proportion of effective black insertion time for each frame of display data in each partition is not significantly different, thus not affecting display brightness. This guarantees that the brightness difference between different frame rates is minimal in VRR mode, avoiding display flickering. Therefore, the embodiments of this disclosure can improve the problem of inconsistent display brightness or even display flickering in VRR mode, and can also improve ghosting.

[0109] According to embodiments of this disclosure, the display driver module 110 is further configured to, in response to the synchronous display update time point of the display update signal, output a black insertion control signal to a corresponding constant current source at a frequency corresponding to the black insertion control information. The synchronous display update time point represents a first predetermined time point after the reception of the current frame display data is completed.

[0110] According to an embodiment of this disclosure, the display driver module 110 is further configured to output a black insertion control signal of a first predetermined duration to the corresponding constant current source at intervals of a second predetermined duration.

[0111] According to embodiments of this disclosure, the display driver module 110 is further configured to perform any of the following:

[0112] When outputting the black insertion control signal to the corresponding constant current source, the display drive signal is synchronously output based on the grayscale data information, so that after the black insertion control signal stops outputting, the constant current source continues to receive the display drive signal.

[0113] When outputting the black insertion control signal to the corresponding constant current source, the output of the display drive signal is stopped. After the black insertion control signal stops being output, the output of the display drive signal to the constant current source continues.

[0114] The display driver module 110 of the embodiments of this disclosure is used to execute the display driver method of the embodiments of this disclosure, and has the same function as the display driver device 20 of the embodiments of this disclosure.

[0115] Referring to Figure 5, an embodiment of this disclosure provides a schematic diagram of the structure of a second display driving system 10. As shown in Figure 5, the display driving system 10 further includes a decoding module 130 and a storage module 140.

[0116] The decoding module 130 is used to decode the input data and generate write data instructions and display update signals for each frame of display data; the input data is generated based on preset rules and display data.

[0117] The storage module 140 is connected to the decoding module 130 and the display driver module 110. The storage module 140 is used to store the write data instructions for each frame of display data sent by the decoding module 130, and in response to the display update signal sent by the decoding module 130, it updates the write data instructions for the current frame of display data to the display driver module 110.

[0118] According to embodiments of this disclosure, the preset rules are determined based on brightness information and frame rate information of the display data. The input data can be sent from a host computer to the decoding module 130, and the display data can be a video stream, etc. The storage module 140 is used to store write data instructions for each frame of display data and display update signals.

[0119] Referring to Figure 6, an embodiment of this disclosure provides a structural schematic diagram of a third display driving system 10. As shown in Figure 6, the storage module 140 includes: a first data storage area 141 and a second data storage area 142.

[0120] The first data storage area 141 is connected to the decoding module 130. The first data storage area 141 is used to store the write data instructions sent by the decoding module 130 for each frame of display data.

[0121] The second data storage area 142 is connected to the decoding module 130 and the display driver module 110. The second data storage area 142 is used to respond to the display update signal sent by the decoding module 130, obtain the write data instruction for the display data of the current frame from the first data storage area 141, and update the grayscale data information and black insertion control information of each partition of the display driver module 110 based on the write data instruction.

[0122] According to embodiments of this disclosure, the first data storage area 141 may be the next frame data storage area, used to cache the grayscale data information and black insertion control information of the next frame display data in the parsed write data instruction, and the second data storage area 142 may be the current frame data storage area, used to synchronously update the grayscale data information and black insertion control information of the current frame display data of each partition when a display update signal is received.

[0123] Based on the display driving system 10 of the embodiments of this disclosure, the embodiments of this disclosure provide a display driving method, including: decoding input data to obtain a write data instruction and a display update signal, wherein the write data instruction includes black insertion control information and grayscale data information; when a synchronous display update time point in the display update signal is identified, a black insertion control signal is output according to the black insertion control information of each partition; simultaneously, each partition outputs a corresponding display driving signal according to the grayscale data information; when the black insertion control signal of each partition is valid, the constant current source is turned off, which is equivalent to not outputting the display driving signal; the constant current source outputs a corresponding current waveform according to the display driving signal.

[0124] The embodiments of this disclosure take into account the impact of existing black frame insertion techniques on display brightness in VRR mode. By decoding input data, write data instructions and display update signals, including black frame insertion control information and grayscale data information, are obtained. When a synchronous display update time point in the display update signal is identified, a black frame insertion control signal is output based on the black frame insertion start point information, black frame insertion duration information, and fixed-frequency black frame insertion information in the black frame insertion control information of each partition. Outside the effective time period of the black frame insertion control signal, a corresponding display drive signal is output based on the grayscale data information; during the effective time period of the black frame insertion control signal, the constant current source is turned off, and no display drive signal is output. A corresponding current waveform is output based on the display drive signal. By using fixed-frequency black frame insertion information to control black frame insertion in the black frame insertion technology of the embodiments of this disclosure, it is possible to ensure that the brightness difference between different frame rates in VRR mode is very small, and the display flickering problem will not occur.

[0125] Based on the same inventive concept, embodiments of this disclosure provide a display device, including: a display driving device 20 or a display driving system 10 according to embodiments of this disclosure.

[0126] According to embodiments of this disclosure, the display device may be a smartphone, tablet computer, 2-in-1 computer, laptop computer, e-reader, smart wearable device, etc.

[0127] The display device of the present disclosure can acquire a write data instruction for the current frame display data. The write data instruction includes grayscale data information and black frame insertion control information for each partition. Then, for each partition, a display drive signal is output to the corresponding constant current source based on the grayscale data information to control the constant current source to output the corresponding drive current, thereby displaying the current frame display data. Based on the black frame insertion control information, a black frame insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black frame insertion control information to turn off the constant current source. That is, a black frame for a period of time can be inserted into the current frame display data, thereby improving the ghosting phenomenon under high display frame rate.

[0128] Meanwhile, the display device in the embodiments of this disclosure outputs a black insertion control signal to the corresponding constant current source at a frequency corresponding to the black insertion control information. This fixed-frequency black insertion method ensures that the proportion of the effective black insertion time period for each frame of display data in each partition is not significantly different, thus not affecting the display brightness. This guarantees that the brightness difference between different frame rates is minimal in VRR mode, avoiding display flickering. Therefore, the embodiments of this disclosure can improve the problem of inconsistent display brightness or even display flickering in VRR mode, and can also improve ghosting.

[0129] The display device of the present disclosure includes the display driving device 20 or display driving system 10 of the present disclosure. It has the same inventive concept and the same beneficial effects as the various embodiments of the display driving device 20 or display driving system 10 described above. For the contents of the display device of the present disclosure that are not described in detail, please refer to the description of the corresponding display driving device 20 or display driving system 10 shown above. They will not be repeated here.

[0130] It should be understood that although arrows indicate various operation steps in the flowcharts of the embodiments of this disclosure, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of the embodiments of this disclosure, the implementation steps in the flowcharts may be executed in other orders as required. Furthermore, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on the actual implementation scenario. Some or all of these sub-steps or stages may be executed at the same time, and each sub-step or stage may also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured as needed, and the embodiments of this disclosure do not limit this.

[0131] In embodiments of this disclosure, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0132] The above description is only an optional implementation of some implementation scenarios of this disclosure. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this disclosure, without departing from the technical concept of this disclosure, also fall within the protection scope of the embodiments of this disclosure.

Claims

1. A display driving method, comprising: Obtain the write data instruction for the display data of the current frame; the write data instruction includes grayscale data information and black insertion control information for each partition; For each partition, a display drive signal is output to the corresponding constant current source based on the grayscale data information, and a black insertion control signal is output to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on the black insertion control information. The display drive signal is used to control the constant current source to output the corresponding drive current, and the blackout control signal is used to turn off the constant current source.

2. The display driving method according to claim 1, wherein, Based on the black insertion control information, a black insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black insertion control information, including: In response to the synchronous display update time point of the display update signal, based on the black insertion control information, a black insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black insertion control information; The synchronous display update time point is used to indicate the first predetermined time point after the reception of the current frame display data is completed.

3. The display driving method according to claim 2, wherein, The blackboard insertion control information includes at least one of the following: Black insertion start point information; the black insertion start point information is used to indicate the interval between the start time of the black insertion control signal and the synchronous display update time. Blackout duration information; the blackout duration information is used to indicate the first predetermined duration of the blackout control signal.

4. The display driving method according to any one of claims 1-3, wherein, The black insertion control information also includes fixed-frequency black insertion information, which is used to indicate that a black insertion control signal of the first predetermined duration is output at intervals of the second predetermined duration. Output a black insertion control signal to the corresponding constant current source at the frequency corresponding to the black insertion control information, including: At every second predetermined time interval, a blackout control signal of the first predetermined time is output to the corresponding constant current source.

5. The display driving method according to claim 1, wherein, The display driving signal is a pulse width modulation signal and / or amplitude modulation signal.

6. The display driving method according to claim 1, further comprising any one of the following: When outputting the black insertion control signal to the corresponding constant current source, a display driving signal is synchronously output based on the grayscale data information, so that after the black insertion control signal stops being output, the constant current source continues to receive the display driving signal. When outputting the black insertion control signal to the corresponding constant current source, the output of the display drive signal is stopped. After the black insertion control signal stops being output, the output of the display drive signal to the constant current source continues.

7. A display driving device, comprising: The acquisition module is used to acquire write data instructions for displaying data in the current frame; The write data command includes grayscale data information and black insertion control information for each partition; The driving module is used to output a display driving signal to the corresponding constant current source for each partition based on the grayscale data information, and to output a black insertion control signal to the corresponding constant current source according to the frequency corresponding to the black insertion control information based on the black insertion control information. The display drive signal is used to control the constant current source to output the corresponding drive current, and the blackout control signal is used to turn off the constant current source.

8. A display driving system, comprising: Constant current module and display driver module; The constant current module includes multiple constant current sources, and each constant current source is connected to a corresponding partition of the display driver module. The display driver module is used to obtain write data instructions for the display data of the current frame; the write data instructions include grayscale data information and black insertion control information for each partition; For each partition, a display drive signal is output to the corresponding constant current source based on the grayscale data information, and a black insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black insertion control information based on the black insertion control information; wherein, the display drive signal is used to control the constant current source to output the corresponding drive current, and the black insertion control signal is used to turn off the constant current source.

9. The display driving system according to claim 8, further comprising: The decoding module is used to decode the input data and generate write data instructions and display update signals for each frame of display data; The input data is generated based on preset rules and displayed data; A storage module, connected to the decoding module and the display driver module, is used to store the write data instructions sent by the decoding module for each frame of display data, and in response to the display update signal sent by the decoding module, update the write data instructions for the current frame of display data to the display driver module.

10. The display driving system according to claim 9, wherein, The storage module includes: The first data storage area is connected to the decoding module and is used to store the write data instructions sent by the decoding module for each frame of display data. The second data storage area, connected to the decoding module and the display driver module, is used to respond to the display update signal sent by the decoding module, obtain a write data instruction for the display data of the current frame from the first data storage area, and update the grayscale data information and black insertion control information of each partition of the display driver module based on the write data instruction.

11. A display device comprising: The display driving device as claimed in claim 7 or the display driving system as claimed in any one of claims 8-10.

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