Display driving method, display driving device, display driving system and display equipment

Abstract

The embodiment of the invention provides a display driving method, a display driving device, a display driving system and display equipment, and relates to the technical field of display. The display driving method comprises the following steps: acquiring a data writing instruction for current frame display data; the data writing instruction comprises gray scale data information and black frame insertion control information of each partition; for each partition, a display driving signal is output to the corresponding constant current source based on the gray 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 driving signal is used for controlling the constant current source to output corresponding driving current, and the black frame insertion control signal is used for closing the constant current source. According to the embodiment of the invention, the black insertion control signal can be output to the corresponding constant current source according to the frequency corresponding to the black insertion control information, so that the effective time period proportion difference of the black insertion control signal of each frame of display data of each partition is small, the display brightness is not influenced, and the problem of display flicker is avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology. Specifically, the present application relates to a display driving method and its device, system, and display equipment. Background Art

[0002] Liquid Crystal Display (LCD) is currently the mainstream display device and is widely used in televisions and personal computers. However, due to the low response speed of the liquid crystal cell (LCC), it is prone to tailing and afterimage phenomenon. A black frame can be added to a frame of display data for a period of time, which can improve the ghosting phenomenon under high display frame rates. However, with the higher requirements for variable refresh rate (VRR) mode, this solution has a great impact on the display brightness under different frame rates, and is prone to display flickering problems. Summary of the invention

[0003] The embodiments of the present application provide a display driving method and apparatus, system, and display device thereof, which are used to solve the technical problem that display flickering is likely to occur when a black frame is added to a frame of display data.

[0004] In a first aspect, an embodiment of the present application provides a display driving method, comprising: Obtaining a write data instruction for display data of the current frame; the write data instruction includes grayscale data information and black insertion control information of each partition; For each partition, output a display driving signal to a corresponding constant current source based on the grayscale data information, and output a black insertion control signal to the corresponding constant current source based on the black insertion control information at a frequency corresponding to the black insertion control information; The display driving signal is used to control the constant current source to output a corresponding driving current, and the black insertion control signal is used to turn off the constant current source.

[0005] In a possible implementation, based on the black insertion control information, outputting a black insertion control signal to a corresponding constant current source at a frequency corresponding to the black insertion control information includes: In response to a synchronous display update time point of the display update signal, based on the black insertion control information, 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 is used to indicate the first predetermined time point after the reception of the current frame display data is completed.

[0006] In a possible implementation, the black insertion control information includes at least one of the following: Black insertion starting point information: The black insertion starting point information is used to indicate the interval between the start time point of the black insertion control signal and the synchronous display update time point; Black insertion duration information: The black insertion duration information is used to indicate a first predetermined duration of the black insertion control signal.

[0007] In a possible implementation, the black insertion control information further includes fixed-frequency black insertion information, where the fixed-frequency black insertion information is used to indicate that a black insertion control signal of a first predetermined duration is output every second predetermined duration. Outputting a black insertion control signal to a corresponding constant current source according to a frequency corresponding to the black insertion control information, including: At intervals of a second predetermined time, a black insertion control signal of a first predetermined time is output to the corresponding constant current source.

[0008] In a possible implementation, the display driving signal is a pulse width modulation signal and / or an amplitude modulation signal.

[0009] In a possible implementation, the display driving method further includes any one of the following: When outputting a black insertion control signal to a 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 the black insertion control signal is output to the corresponding constant current source, the display driving signal is stopped from being output, and after the black insertion control signal stops being output, the display driving signal continues to be output to the constant current source.

[0010] In a second aspect, an embodiment of the present application provides a display driving device, including: An acquisition module is used to acquire a write data instruction for display data of the current frame; the write data instruction includes grayscale data information and black insertion control information of each partition; A driving module, for each partition, outputting a display driving signal to a corresponding constant current source based on the grayscale data information, and outputting a black insertion control signal to the corresponding constant current source based on the black insertion control information at a frequency corresponding to the black insertion control information; The display driving signal is used to control the constant current source to output a corresponding driving current, and the black insertion control signal is used to turn off the constant current source.

[0011] In a third aspect, an embodiment of the present application provides a display driving system, including: a constant current module and a display driving module; The constant current module includes a plurality of constant current sources, each of which is connected to a partition of the display driving module; The display driver module is used to obtain a write data instruction for the current frame display data; the write data instruction includes grayscale data information and black insertion control information of each partition; for each partition, a display drive signal is output to the corresponding constant current source based on the grayscale data information, and 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; 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.

[0012] In a possible implementation, the display driving system further includes: A decoding module, used to decode input data and generate a write data instruction and a display update signal for each frame of display data; the input data is generated based on preset rules and display data; The storage module is connected to the decoding module and the display driving module, and is used to store the write data instruction for each frame of display data sent by the decoding module, and update the write data instruction for the current frame of display data to the display driving module in response to the display update signal sent by the decoding module.

[0013] In a possible implementation, the storage module includes: A first data storage area, connected to the decoding module, for storing a data writing instruction for each frame of display data sent by the decoding module; The second data storage area is connected to the decoding module and the display driving module, and is used to respond to the display update signal sent by the decoding module, obtain the write data instruction for the current frame display data from the first data storage area, and update the grayscale data information and black insertion control information of each partition of the display driving module based on the write data instruction.

[0014] In a fourth aspect, an embodiment of the present application provides a display device, comprising: the display driving apparatus of the second aspect or the display driving system of the third aspect.

[0015] The beneficial effects of the technical solution provided by the embodiment of the present application are: The embodiment of the present application can obtain a write data instruction for the current frame display data, the write data instruction includes the grayscale data information and black insertion control information of each partition, and 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, so that the current frame display data can be displayed; based on the black insertion control information, a black insertion control signal can be output to the corresponding constant current source at a frequency corresponding to the black insertion control information to turn off the constant current source, that is, a black frame can be inserted into the current frame display data for a period of time, thereby improving the ghosting phenomenon under high display frame rate.

[0016] At the same time, the embodiment of the present application 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 can make the proportion of the black insertion effective time period of each frame display data of each partition not much different, and will not affect the display brightness. It can ensure that the brightness difference of different frame frequencies in VRR mode is very small, avoiding the problem of display flickering. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in describing the embodiments of the present application.

[0018] Figure 1 A flow chart of a display driving method is provided for an embodiment of the present application; Figure 2 A display timing diagram of a display driving method provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a display driving device provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a first display driving system provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a second display driving system provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a third display driving system provided in an embodiment of the present application.

[0019] Reference numerals: 10- Display drive system; 110-display driver 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-driving module. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0021] It will be understood by those skilled in the art that, unless specifically stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the terms "including" and "comprising" used in the embodiments of the present application refer to that the corresponding features can be implemented as the presented features, information, data, steps, operations, elements and / or components, but do not exclude the implementation as other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the technical field. 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 refer to that the one element and the other element establish a connection relationship through an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein indicates at least one of the items defined by the term, for example, "A and / or B" indicates that it is implemented as "A", or is implemented as "A", or is implemented as "A and B".

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0023] In the related art, liquid crystal display (LCD) is currently the mainstream display device and is widely used in televisions and personal computers. However, due to the low response speed of the liquid crystal cell (LCD), the phenomenon of trailing image is prone to occur. In order to solve the problem of trailing image afterimage in LCD display devices, the commonly used black insertion technology solution can be to add a black frame between two frames of data, thereby effectively improving the phenomenon of trailing image afterimage. However, this method requires multiple data frames to be sent, which has certain requirements for data bandwidth. With the higher demand for display frame rate and resolution, the data transmission time is further compressed and the data volume increases. Therefore, this technical solution is no longer suitable for existing LCD display devices.

[0024] The inventor of the present application has further discovered that by adding a black frame for a period of time in a frame of display data, the ghosting phenomenon can be improved under high display frame rates. However, with the higher requirements for the variable refresh rate (VRR) mode, this method has a great impact on the display brightness under different frame rates, and more seriously, display flickering may occur.

[0025] Among them, VRR (Variable Refresh Rate) mode is a technology that allows the screen to dynamically adjust the refresh rate of the image display according to the current game frame rate, thereby providing a smoother visual experience. This technology can solve the problem of tearing or jittering in the game screen, 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 and next game frames appear on the screen at the same time, thereby reducing the phenomenon of screen tearing.

[0026] The display driving method and its device, system, and display equipment provided in the present application are intended to solve the above technical problems in the prior art.

[0027] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above technical problems with specific embodiments. It should be noted that the following implementations can refer to, draw on or combine with each other, and the same terms, similar features and similar implementation steps in different implementations will not be described repeatedly.

[0028] See also Figure 1 As shown, the present application embodiment provides a flow chart of a display driving method. Figure 1 As shown, the display driving method includes: step S101 to step S102.

[0029] S101, obtaining a write data instruction for display data of a current frame; the write data instruction includes grayscale data information and black insertion control information of each partition.

[0030] Optionally, the grayscale data information is used to output a display driving signal to a corresponding constant current source, so that the constant current source outputs a corresponding driving current, and the current frame display data can be displayed.

[0031] The black insertion control information can insert a black frame for a period of time in the current frame display data. The black insertion control information is used to output a black insertion control signal to the corresponding constant current source. The time of the black insertion control signal is a first predetermined time length, thereby realizing the insertion of a black frame for a period of time in the current frame display data.

[0032] S102 . For each partition, output a display driving signal to a corresponding constant current source based on the grayscale data information, and output a black insertion control signal to the corresponding constant current source based on the black insertion control information at a frequency corresponding to the black insertion control information.

[0033] The display driving signal is used to control the constant current source to output a corresponding driving current, and the black insertion control signal is used to turn off the constant current source.

[0034] Optionally, each partition is equivalent to a data channel, and the grayscale data information and black insertion control information of each partition can be output through the corresponding data channel. The black insertion control signal is used to turn off the constant current source, and the constant current source cannot receive the display drive signal at this time.

[0035] Optionally, the black insertion control information may be used to characterize the output frequency of the black insertion control signal, or each partition may pre-store a frequency corresponding to the black insertion control information, thereby achieving fixed-frequency black insertion and outputting the black insertion control signal at a certain frequency.

[0036] Based on the above steps S101 to S102, the display driving method of the embodiment of the present application can obtain a write data instruction for the current frame display data, and the write data instruction includes the grayscale data information and black insertion control information of 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, so that the current frame display data can be displayed; 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 to turn off the constant current source, that is, a black frame can be inserted into the current frame display data for a period of time, thereby improving the ghosting phenomenon under high display frame rate.

[0037] At the same time, the display driving method of the embodiment of the present application 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 can make the black insertion effective 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 in VRR mode is very small, avoiding the problem of display flicker. Therefore, the embodiment of the present application can improve the problem of inconsistent display brightness or even display flicker in VRR mode, and can also improve the ghosting phenomenon.

[0038] The embodiment of the present application relates to the field of LED (light emitting diode) display technology, which inserts black into each frame of display data at a certain frequency to improve the problem of inconsistent display brightness or even display flickering in VRR mode, and at the same time improve the ghosting phenomenon. The display driving method provided in the embodiment of the present application can be applied to various liquid crystal display devices.

[0039] In some embodiments, in step S102, based on the black insertion control information, outputting a black insertion control signal to a corresponding constant current source at a frequency corresponding to the black insertion control information includes: 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.

[0040] 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.

[0041] In the embodiment of the present application, the synchronous display update time point is used as a reference time point of a fixed frequency, and at each synchronous display update time point, a black insertion control signal is output to the corresponding constant current source at a frequency corresponding to the black insertion control information.

[0042] In some embodiments, the black insertion control information includes at least one of the following: Black insertion starting point information: The black insertion starting point information is used to indicate the interval between the start time point of the black insertion control signal and the synchronous display update time point; Black insertion duration information: The black insertion duration information is used to indicate a first predetermined duration of the black insertion control signal.

[0043] Specifically, the first predetermined time length is the effective time of the black insertion control signal, and within the first predetermined time length, the black insertion control signal is effective.

[0044] In some embodiments, the black insertion control information further includes fixed-frequency black insertion information, where the fixed-frequency black insertion information is used to indicate that a black insertion control signal of a first predetermined duration is output every second predetermined duration; Outputting a black insertion control signal to a corresponding constant current source according to a frequency corresponding to the black insertion control information, including: At intervals of a second predetermined time, a black insertion control signal of a first predetermined time is output to the corresponding constant current source.

[0045] Optionally, the fixed-frequency black insertion information provides the interval 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 corresponding to the black insertion starting point information and the black insertion duration information to output a black insertion control signal each time.

[0046] As an example, the black insertion control information includes black insertion starting point information, black insertion duration information and fixed-frequency black insertion information. The black insertion starting point, black insertion duration and fixed-frequency black insertion duration can be set uniformly or independently for all partitions. Different options and settings can be made according to different solutions.

[0047] In some embodiments, the display driving signal is a pulse width modulation signal and / or an amplitude modulation signal.

[0048] Optionally, pulse width modulation can be an analog control method, which modulates the bias of the transistor base or the MOS tube gate according to the change of the corresponding load to achieve the change of the transistor or MOS tube conduction time, thereby achieving the change of the output of the switching regulated power supply.

[0049] Optionally, the amplitude modulated signal is an amplitude modulated signal according to the definition of amplitude modulation. When the amplitude value of the carrier changes linearly with the magnitude of the modulation signal, it is an amplitude modulated signal.

[0050] In some embodiments, the display driving method further includes any one of the following: When outputting a black insertion control signal to a 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 the black insertion control signal is output to the corresponding constant current source, the display driving signal is stopped from being output, and after the black insertion control signal stops being output, the display driving signal continues to be output to the constant current source.

[0051] In actual applications, when the embodiment of the present application outputs a black insertion control signal to the corresponding constant current source, the constant current source is in a closed state and does not receive a display drive signal. However, the display drive signal can be output synchronously according to the timing, but the constant current source does not receive it. After the black insertion control signal stops being output, the constant current source continues to receive the display drive signal at the current moment.

[0052] The inventor of the present application has found through research that in VRR mode, if the difference in the effective black insertion time period between the Nth frame data and the N+1 frame data is large, it is particularly easy to cause a large difference in brightness during normal display, affecting the display effect. The display driving method of the embodiment of the present application can avoid the above problem.

[0053] See also Figure 2 As shown, the embodiment of the present application provides a display timing diagram of a display driving method. Figure 2 As shown, the Nth frame of chip data and the N+1th frame of chip data are display data, partition 0, partition 1, and partition 2 correspond to one partition respectively, displaying the N-1th frame data, displaying the Nth frame data, and displaying the N+1th frame data are to display each frame data as the current frame display data respectively, the black insertion length is the duration of the black insertion control signal, and the partition 2 black insertion starting point is the starting time point of the black insertion control signal.

[0054] See also Figure 2As shown, according to the input data, the partition 0 black insertion starting point is 0us, the partition 1 black insertion starting point is 100us, and the partition 2 black insertion starting point is 200us. The black insertion duration is uniformly 200us, and the fixed-frequency black insertion duration is uniformly 450us; take the synchronous display update point as the coordinate origin for explanation, the unit is us: the first black insertion: the partition 0 black insertion control signal effective time period is [0, 200], that is, [partition 0 black insertion starting point, partition 0 black insertion starting point + black insertion duration], the partition 1 black insertion control signal effective time period is [100, 300], that is, [partition 1 black insertion starting point, partition 1 black insertion starting point + black insertion duration], the partition 2 black insertion control signal effective time period is [200, 400], that is, [partition 2 black insertion starting point, partition 2 black insertion starting point + black insertion duration].

[0055] Second black insertion: The effective time period of the black insertion control signal of partition 0 is [450, 650], that is, [partition 0 black insertion starting point + fixed-frequency black insertion time × 1, partition 0 black insertion starting point + black insertion time + fixed-frequency black insertion time × 1], the effective time period of the black insertion control signal of partition 1 is [550, 750], that is, [partition 1 black insertion starting point + fixed-frequency black insertion time × 1, partition 1 black insertion starting point + black insertion time + fixed-frequency black insertion time × 1], and the effective time period of the black insertion control signal of partition 2 is [650, 850], that is, [partition 2 black insertion starting point + fixed-frequency black insertion time × 1, partition 2 black insertion starting point + black insertion time + fixed-frequency black insertion time × 1].

[0056] The Nth black insertion: the effective time period of the black insertion control signal of partition 0 is [450, 650], that is, [partition 0 black insertion starting point + fixed-frequency black insertion duration × (N-1), partition 0 black insertion starting point + black insertion duration + fixed-frequency black insertion duration × (N-1)], the effective time period of the black insertion control signal of partition 1 is [550, 750], that is, [partition 1 black insertion starting point + fixed-frequency black insertion duration × (N-1), partition 1 black insertion starting point + black insertion duration + fixed-frequency black insertion duration × (N-1)], the effective time period of the black insertion control signal of partition 2 is [650, 850], that is, [partition 2 black insertion starting point + fixed-frequency black insertion duration × (N-1), partition 2 black insertion starting point + black insertion duration + fixed-frequency black insertion duration × (N-1)].

[0057] Therefore, in the VRR mode, the display driving method of the embodiment of the present application can ensure that the proportion of the black insertion effective time period of each frame of display data is consistent even if the frame rates of the two frames of display data differ greatly, and will not affect the display brightness.

[0058] See also Figure 3 As shown, the present application embodiment provides a schematic diagram of the structure of a display driving device 20. Figure 3 As shown, the display driving device 20 includes: an acquisition module 201 and a driving module 202 .

[0059] The acquisition module 201 is used to acquire a write data instruction for display data of the current frame; the write data instruction includes grayscale data information and black insertion control information of each partition.

[0060] The driving module 202 is used for outputting a display driving signal to a corresponding constant current source based on the grayscale data information for each partition, and outputting a black insertion control signal to the corresponding constant current source based on the black insertion control information at a frequency corresponding to the black insertion control information.

[0061] The display driving signal is used to control the constant current source to output a corresponding driving current, and the black insertion control signal is used to turn off the constant current source.

[0062] Optionally, the driving module 202 is further configured to respond to the synchronous display update time point of the display update signal, and output a black insertion control signal to the corresponding constant current source at a frequency corresponding to the black insertion control information based on 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.

[0063] Optionally, the driving module 202 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.

[0064] Optionally, the driving module 202 is further used for any of the following: When outputting a black insertion control signal to a 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 the black insertion control signal is output to the corresponding constant current source, the display driving signal is stopped from being output, and after the black insertion control signal stops being output, the display driving signal continues to be output to the constant current source.

[0065] The device of the embodiments of the present application can execute the method provided by the embodiments of the present application, and the implementation principles are similar. The actions performed by each module in the device of each embodiment of the present application correspond to the steps in the method of each embodiment of the present application. For the detailed functional description of each module of the device, please refer to the description in the corresponding method shown in the previous text, which will not be repeated here.

[0066] See also Figure 4 As shown, the present embodiment provides a schematic diagram of the structure of a first display driving system 10. Figure 4 As shown, the display driving system 10 includes: a constant current module 120 and a display driving module 110 .

[0067] The constant current module 120 includes a plurality of constant current sources, each of which is connected to a corresponding partition of the display driving module 110 .

[0068] The display driver module 110 is used to obtain a write data instruction for the current frame display data; the write data instruction includes grayscale data information and black insertion control information of 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 based on the black insertion control information at a frequency corresponding to 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.

[0069] Optionally, the constant current module 120 can output a current waveform corresponding to the display driving signal. The display driving module 110 has a plurality of data channels, each of which is equivalent to a partition.

[0070] The display driving system 10 of the embodiment of the present application can obtain a write data instruction for the current frame display data, and the write data instruction includes the grayscale data information and black insertion control information of 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, so that the current frame display data can be displayed; based on the black insertion control information, a black insertion control signal can be output to the corresponding constant current source at a frequency corresponding to the black insertion control information to turn off the constant current source, that is, a black frame can be inserted into the current frame display data for a period of time, thereby improving the ghosting phenomenon under high display frame rate.

[0071] At the same time, the display driving system 10 of the embodiment of the present application 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 can make the black insertion effective 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 in VRR mode is very small, avoiding the problem of display flicker. Therefore, the embodiment of the present application can improve the problem of inconsistent display brightness or even display flicker in VRR mode, and can also improve the ghosting phenomenon.

[0072] Optionally, the display driver module 110 is further configured to respond to the synchronous display update time point of the display update signal, and output a black insertion control signal to the corresponding constant current source at a frequency corresponding to the black insertion control information based on 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.

[0073] Optionally, the display driving 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.

[0074] Optionally, the display driver module 110 is further used for any of the following: When the black insertion control signal is output to the corresponding constant current source, the 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.

[0075] When the black insertion control signal is output to the corresponding constant current source, the display driving signal is stopped from being output, and after the black insertion control signal stops being output, the display driving signal continues to be output to the constant current source.

[0076] The display driving module 110 of the embodiment of the present application is used to execute the display driving method of the embodiment of the present application, and has the same function as the display driving device 20 of the embodiment of the present application.

[0077] See also Figure 5 As shown, the present embodiment provides a schematic diagram of the structure of a second display driving system 10. Figure 5 As shown, the display driving system 10 further includes: a decoding module 130 and a storage module 140 .

[0078] The decoding module 130 is used to decode the input data and generate a write data instruction and a display update signal for each frame of display data; the input data is generated based on a preset rule and the display data.

[0079] 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 instruction 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, update the write data instruction for the current frame of display data to the display driver module 110.

[0080] Optionally, the preset rule is determined based on the brightness information and frame rate of the display data, the input data may be sent by the host computer to the decoding module 130, and the display data may be a video stream, etc. The storage module 140 is used to store the write data instruction and display update signal of each frame of display data.

[0081] See also Figure 6 As shown, the present embodiment provides a schematic diagram of the structure of a third display driving system 10. Figure 6 As shown, the storage module 140 includes: a first data storage area 141 and a second data storage area 142 .

[0082] The first data storage area 141 is connected to the decoding module 130 , and is used to store the write data instruction for each frame of display data sent by the decoding module 130 .

[0083] 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 current frame display data 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.

[0084] Optionally, the first data storage area 141 can be a 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 can be a 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.

[0085] Based on the display driving system 10 of the embodiment of the present application, the embodiment of the present application provides a display driving method, including: decoding input data to obtain a write data instruction and a display update signal, 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; at the same time, each partition outputs a corresponding display driving signal according to the grayscale data information, and when the black insertion control signal of each partition is valid, a constant current source is turned off, which is equivalent to not outputting a display driving signal; the constant current source outputs a corresponding current waveform according to the display driving signal.

[0086] The embodiment of the present application takes into account the influence of the existing black insertion technology on the display brightness in the VRR mode, and obtains the write data instruction and display update signal including the black insertion control information and the grayscale data information by decoding the input data; when the synchronous display update time point in the display update signal is identified, the black insertion control signal is output according to the black insertion starting point information, black insertion duration information and fixed-frequency black insertion information in the black insertion control information of each partition; the corresponding display drive signal is output according to the grayscale data information outside the effective time period of the black insertion control signal, and the constant current source is turned off during the effective time period of the black insertion control signal, and the display drive signal is not output; the corresponding current waveform is output according to the display drive signal. The black insertion technology of the embodiment of the present application uses the fixed-frequency black insertion information to control the black insertion, which can ensure that the brightness difference of different frame rates in the VRR mode is very small, and there will be no display flickering problem.

[0087] Based on the same inventive concept, an embodiment of the present application provides a display device, including: a display driving apparatus 20 of an embodiment of the present application or a display driving system 10 of an embodiment of the present application.

[0088] Optionally, the display device may be a smart phone, a tablet computer, a two-in-one computer, a laptop computer, an e-reader, a smart wearable device, etc.

[0089] The display device of the embodiment of the present application can obtain a write data instruction for the current frame display data, and the write data instruction includes the grayscale data information and black insertion control information of 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, so that the current frame display data can be displayed; based on the black insertion control information, a black insertion control signal can be output to the corresponding constant current source at a frequency corresponding to the black insertion control information to turn off the constant current source, that is, a black frame can be inserted into the current frame display data for a period of time, thereby improving the ghosting phenomenon under high display frame rate.

[0090] At the same time, the display device of the embodiment of the present application 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 can make the black insertion effective 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 in VRR mode is very small, avoiding the problem of display flicker. Therefore, the embodiment of the present application can improve the problem of inconsistent display brightness or even display flicker in VRR mode, and can also improve the ghosting phenomenon.

[0091] The display device of the embodiment of the present application includes the display driver device 20 or the display driver system 10 of the embodiment of the present application, and has the same inventive concept and the same beneficial effect as the various embodiments described in the previous display driver device 20 or the display driver system 10. For the contents not described in detail in the function of the display device of the present application, please refer to the description of the corresponding display driver device 20 or the display driver system 10 shown in the previous text, and will not be repeated here.

[0092] It should be understood that, although each operation step is indicated by arrows in the flowchart of the embodiment of the present application, the implementation order of these steps is not limited to the order indicated by the arrows. Unless clearly stated herein, in some implementation scenarios of the embodiment of the present application, the implementation steps in each flowchart can be performed in other orders according to demand. In addition, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, and each sub-step or stage in these sub-steps or stages may also be executed at different times respectively. In different scenarios of execution time, the execution order of these sub-steps or stages may be flexibly configured according to demand, and the embodiment of the present application does not limit this.

[0093] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program that has a predetermined function and works together with other related parts to achieve a predetermined goal, and can be implemented in whole or in part by using software, hardware (such as processing circuits or memories), or a combination thereof. Similarly, a processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be part of an overall module or unit that includes the function of the module or unit.

[0094] The above is only an optional implementation method for some implementation scenarios of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A display driving method, characterized in that: include: Obtaining a write data instruction for display data of the current frame; the write data instruction includes grayscale data information and black insertion control information of each partition; For each partition, output a display driving signal to a corresponding constant current source based on the grayscale data information, and output a black insertion control signal to the corresponding constant current source based on the black insertion control information at a frequency corresponding to the black insertion control information; The display driving signal is used to control the constant current source to output a corresponding driving current, and the black insertion control signal is used to turn off the constant current source.

2. The display driving method according to claim 1, characterized in that: Based on the black insertion control information, outputting a black insertion control signal to a corresponding constant current source at a frequency corresponding to the black insertion control information includes: In response to a synchronous display update time point of a display update signal, based on the black insertion control information, 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 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, characterized in that: The black insertion control information includes at least one of the following: Black insertion starting point information; the black insertion starting point information is used to indicate the interval time between the start time point of the black insertion control signal and the synchronous display update time point; Black insertion duration information: The black insertion duration information is used to indicate a first predetermined duration of the black insertion control signal.

4. The display driving method according to any one of claims 1 to 3, characterized in that: The black insertion control information further includes fixed-frequency black insertion information, wherein the fixed-frequency black insertion information is used to indicate that a black insertion control signal of a first predetermined duration is output every second predetermined duration; Outputting a black insertion control signal to a corresponding constant current source according to a frequency corresponding to the black insertion control information includes: At intervals of a second predetermined time, a black insertion control signal of a first predetermined time is output to the corresponding constant current source.

5. The display driving method according to claim 1, characterized in that: The display driving signal is a pulse width modulation signal and / or an amplitude modulation signal.

6. The display driving method according to claim 1, characterized in that: Also includes any of the following: When outputting a black insertion control signal to a corresponding constant current source, synchronously outputting a display driving signal 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 the black insertion control signal is output to the corresponding constant current source, the display driving signal is stopped from being output, and after the black insertion control signal stops being output, the display driving signal continues to be output to the constant current source.

7. A display driving device, characterized in that: include: An acquisition module, used to acquire a write data instruction for display data of a current frame; the write data instruction includes grayscale data information and black insertion control information of each partition; A driving module, configured to output a display driving signal to a corresponding constant current source based on the grayscale data information for each partition, and output a black insertion control signal to the corresponding constant current source based on the black insertion control information at a frequency corresponding to the black insertion control information; The display driving signal is used to control the constant current source to output a corresponding driving current, and the black insertion control signal is used to turn off the constant current source.

8. A display driving system, characterized in that: include: Constant current module and display driver module; The constant current module includes a plurality of constant current sources, each of which is connected to a partition of the display driving module; The display driver module is used to obtain a write data instruction for display data of the current frame; the write data instruction includes grayscale data information and black insertion control information of 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 based on the black insertion control information at a frequency corresponding to the black insertion control information; wherein the display drive signal is used to control the constant current source to output a 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, characterized in that: Also includes: A decoding module, used for decoding input data and generating a write data instruction and a display update signal for each frame of display data; The input data is generated based on preset rules and display data; A storage module is connected to the decoding module and the display driving module, and is used to store the write data instruction for each frame of display data sent by the decoding module, and update the write data instruction for the current frame of display data to the display driving module in response to the display update signal sent by the decoding module.

10. The display driving system according to claim 9, characterized in that: The storage module comprises: A first data storage area, connected to the decoding module, for storing a data writing instruction for each frame of display data sent by the decoding module; A second data storage area is connected to the decoding module and the display driver module, and is used to obtain a write data instruction for the current frame display data from the first data storage area in response to a display update signal sent by the decoding module, 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, characterized in that: include: The display driving device according to claim 7 or the display driving system according to any one of claims 8 to 10.

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