WO2023040592A1 - 图像数据传输方法、装置、终端及介质 - Google Patents

图像数据传输方法、装置、终端及介质 Download PDF

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Publication number
WO2023040592A1
WO2023040592A1 PCT/CN2022/114024 CN2022114024W WO2023040592A1 WO 2023040592 A1 WO2023040592 A1 WO 2023040592A1 CN 2022114024 W CN2022114024 W CN 2022114024W WO 2023040592 A1 WO2023040592 A1 WO 2023040592A1
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WIPO (PCT)
Prior art keywords
ddic
frame
image data
timer
signal
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PCT/CN2022/114024
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English (en)
French (fr)
Inventor
高延凯
王月文
苗守飞
钟柳和
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Oppo广东移动通信有限公司
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Publication of WO2023040592A1 publication Critical patent/WO2023040592A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/39—Control of the bit-mapped memory
    • G09G5/393—Arrangements for updating the contents of the bit-mapped memory

Definitions

  • the embodiments of the present application relate to the field of display technology, and in particular to an image data transmission method, device, terminal and medium.
  • the DDIC outputs the frame rate according to the AP (that is, the output The rate of image data) adaptively adjusts the refresh frequency to realize adaptive frequency conversion.
  • AP Application Processor
  • DDIC display driver integrated circuit
  • the output frame rate of the AP will fluctuate within a certain range, it will cause the refresh rate of the DDIC to fluctuate.
  • the refresh rate jumps, for example, when the refresh rate jumps from 45Hz to 72Hz, the screen will flicker and shake. problem that affects image display quality.
  • Embodiments of the present application provide an image data transmission method, device, terminal, and medium. Described technical scheme is as follows:
  • an embodiment of the present application provides an image data transmission method for an AP, and the method includes:
  • n is an integer less than m and greater than or equal to 2;
  • the m+1th frame of image data is transmitted to the DDIC.
  • an image data transmission device the device includes:
  • the transmission module is used to transmit the image data of the mth frame to the DDIC, where m is a positive integer;
  • the first determination module is used to determine the historical refresh frequency of the DDIC when displaying the m-nth to m-1th frame images, n is an integer less than m and greater than or equal to 2;
  • a delay module configured to perform a display delay operation on the (m+1)th frame of image data when the historical refresh frequency satisfies the display delay condition, and the display delay operation is used to delay the transmission to the DDIC Describe the image data of the m+1th frame;
  • the transmission module is further configured to transmit the m+1th frame of image data to the DDIC when the display delay operation is completed.
  • an embodiment of the present application provides a terminal, the terminal includes an AP, a display screen, and a DDIC, and the AP and the DDIC are connected through a Mobile Industry Processor Interface (MIPI),
  • MIPI Mobile Industry Processor Interface
  • the AP is used to execute at least one program in the memory to realize the image data transmission method described above.
  • an embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores at least one program, and the at least one program is used to be executed by a processor to implement the above-mentioned image data transmission method .
  • an embodiment of the present application provides a computer program product, the computer program product includes computer instructions, and the computer instructions are stored in a computer-readable storage medium; the processor of the terminal reads the computer program from the computer-readable storage medium. Instructions, the processor executes the computer instructions, so that the terminal executes the image data transmission method provided in the above aspect.
  • FIG. 1 shows a schematic diagram of an image display process under the AP-DDCI-Panel architecture
  • FIG. 2 shows a schematic diagram of the principle of an image data transmission method provided by an exemplary embodiment of the present application
  • FIG. 3 shows a flowchart of an image data transmission method provided by an exemplary embodiment of the present application
  • Figure 4 shows a comparison of the refresh frequency when the display delay mechanism is introduced and the display delay mechanism is not introduced
  • FIG. 5 shows a flowchart of a process of determining a historical refresh rate provided by an exemplary embodiment of the present application
  • FIG. 6 shows a schematic diagram of the implementation of the historical refresh frequency determination process provided by an exemplary embodiment of the present application
  • FIG. 7 shows a flowchart of an image data transmission method provided by another exemplary embodiment of the present application.
  • Fig. 8 shows an implementation schematic diagram of the implementation process of the image data transmission method shown in Fig. 7;
  • FIG. 9 shows a flowchart of an image data transmission method shown in another exemplary embodiment of the present application.
  • FIG. 10 shows a schematic diagram of the implementation process of the image data transmission method shown in FIG. 9;
  • Fig. 11 shows a structural block diagram of an image data transmission device provided by an embodiment of the present application.
  • Fig. 12 shows a structural block diagram of a terminal provided by an exemplary embodiment of the present application.
  • the AP side first performs layer drawing and rendering through the application program (Application, App), and then performs layering on the drawn layer through SurfaceFlinger (layer compositor) Synthesize the image data, and then send the image data to display (write) DDIC through MIPI.
  • the DDIC stores the image data sent by the AP in the buffer (Buffer), and controls the Panel to refresh and display the image (Display) by scanning (reading) the image data in the Buffer.
  • the DDIC When implementing adaptive frequency conversion, the DDIC will adaptively adjust the refresh frequency according to the output frame rate of the AP (that is, the amount of image data transmitted by the AP to the DDIC per unit time, or the speed at which the AP transmits image data to the DDIC). For example, when the output frame rate of the AP decreases, the DDIC lowers the refresh rate, and when the output frame rate of the AP increases, the DDIC increases the refresh rate.
  • the output frame rate of the AP that is, the amount of image data transmitted by the AP to the DDIC per unit time, or the speed at which the AP transmits image data to the DDIC. For example, when the output frame rate of the AP decreases, the DDIC lowers the refresh rate, and when the output frame rate of the AP increases, the DDIC increases the refresh rate.
  • the refresh frequency changes in a small range in a short time without affecting the image display quality, but when the refresh frequency changes in a large range in a short time, problems such as flickering and jitter will occur, which will affect the image display quality.
  • the output frame rate of the AP changes from 60 Hz to 45 Hz in a short period of time, and then changes from 45 Hz to 72 Hz, and the refresh rate of the DDIC changes from 60 Hz.
  • the refresh rate of DDIC changes from 45Hz to 72Hz, the flickering and jittering of the screen will appear because the refresh rate changes too much.
  • the AP side introduces a display delay mechanism.
  • the AP obtains the historical refresh rate of DDIC during the display process of the latest n frames of images (that is, the refresh rate of DDIC when displaying each frame of images in the latest n frames of images), and stabilizes the algorithm based on the DDIC refresh rate
  • the AP obtains the historical refresh rate of DDIC during the display process of the latest n frames of images (that is, the refresh rate of DDIC when displaying each frame of images in the latest n frames of images), and stabilizes the algorithm based on the DDIC refresh rate
  • Check the display delay condition for the historical refresh frequency so that when the display delay condition is met, the next frame of image data will be sent to the display delay operation, avoiding the problem of a large jump in the refresh frequency, and achieving the effect of stabilizing the DDIC refresh frequency , thereby reducing the flickering problem of the display screen.
  • the AP obtains the historical refresh rate of the DDIC during the display of the last two frames of images.
  • the historical refresh rates of the DDIC are 60 Hz (refresh frame image refresh rate)
  • the AP directly transmits the next frame of image data to the DDIC after completing the data preparation, the refresh rate of the DDIC will become 72Hz; and after the display delay mechanism is introduced, the AP detects the historical refresh of the DDIC
  • the frequency satisfies the delay condition of sending display, so that the next frame of image data is transmitted to DDIC after a certain period of time delay, so that the refresh frequency of DDIC becomes 60Hz, thus avoiding the sharp jump of DDIC refresh frequency directly from 45Hz to 72Hz.
  • the method provided in the embodiment of the present application is applied to a terminal, and the above image data transmission method is executed by an AP in the terminal.
  • the terminal may include a smart phone, a tablet computer, a wearable device (such as a smart watch), a portable personal computer, a smart TV, etc.
  • the embodiment of the present application does not limit the specific type of the terminal.
  • FIG. 3 shows a flowchart of an image data transmission method provided by an exemplary embodiment of the present application.
  • the method includes:
  • Step 301 transmit the image data of the mth frame to the DDIC, where m is a positive integer.
  • the AP and the DDIC are connected through MIPI. After the image data preparation is completed, the AP transmits the image data to the DDIC through the MIPI, and the DDIC controls the panel to display the image based on the image data.
  • Step 302 determine the historical refresh frequency of the DDIC when displaying the m-nth to m-1th frames of images, where n is an integer less than m and greater than or equal to 2.
  • the AP In order to avoid jumping the refresh frequency of DDIC, before transmitting the next frame of image data (that is, the m+1th frame of image data) to DDIC, the AP needs to determine the latest n frames of images (that is, the m-nth to m-1th frame of image) Display the historical refresh rate of DDIC during the display process, so as to check whether the display delay condition is satisfied based on the historical refresh rate.
  • the specific implementation manner of determining the historical refresh frequency on the DDIC side the following embodiments will describe in detail.
  • the AP monitors the refresh rate of the DDIC in real time during the image display process of each frame, and performs a corresponding refresh rate on the n-frame images closest to the m-th frame (currently displayed frame).
  • Storage that is, the AP stores the historical refresh frequency of the last n frames.
  • the AP obtains the stored n historical refresh frequencies.
  • the AP determines the first DDIC during the display of the 8th frame of image The historical refresh rate, and the second historical refresh rate of DDIC during the image display of the ninth frame.
  • Step 303 When the historical refresh frequency meets the display delay condition, perform a display delay operation on the m+1th frame of image data, and the display delay operation is used to delay the transmission of the m+1th frame of image data to the DDIC.
  • the display delay condition is used to filter sporadic acceleration requests on the AP side, preventing the DDIC from directly increasing from a low refresh rate to a high refresh rate.
  • the AP when the image data preparation speed on the AP side changes suddenly in a short period of time, the AP generates sporadic acceleration requests, and after the sporadic acceleration requests, the speed of preparing image data on the AP side drops and cannot be maintained for a long time. Occurs after the delay in preparing image frame data on the AP side.
  • the AP judges whether there is an image preparation delay in the latest n frames of images based on the historical refresh frequency of the latest n frames of images.
  • +1 frame of image data is sent to the display with a delay operation to avoid that when the m+1th frame of image data is prepared in advance, the refresh rate jumps due to the AP immediately transmitting the m+1th frame of image data to the DDIC (because the previous frame is sent Display delay will shorten the sending interval between two adjacent frames of image data, which will lead to an increase in refresh rate).
  • the purpose of the display delay operation is to reduce the refresh frequency of the DDIC, so as to avoid the sudden increase in the image preparation speed of the AP side that causes the DDIC refresh frequency to jump and rise when there is an image preparation delay in the latest n frames of images. .
  • the mode of performing the display delay operation on the m+1th frame image data may include skipping the tearing effect (Tearing Effect, TE) signal (Skip TE) or blocking MIPI (MIPI Block), the following embodiments will The above two methods are described in detail.
  • TE tearing Effect
  • MIPI Block blocking MIPI
  • the AP when the historical refresh frequency of the latest n frames does not meet the display delay condition, the AP does not need to perform the display delay operation on the m+1th frame of image data, and transmits the m+1th frame to the DDIC according to the conventional display logic image data.
  • Step 304 when the delay operation of sending to display is completed, transmit the m+1th frame of image data to the DDIC.
  • the AP transmits the m+1th frame of image data to the DDIC according to the TE signal output by the DDIC. After completing the transmission of the image data of the m+1 frame, and before transmitting the image data of the m+2 frame, the AP re-executes the above steps 302 to 303, which will not be repeated here in this embodiment.
  • the DDIC displays according to the refresh frequency corresponding to the frame register (the register used to store the correspondence between the refresh frequency and the display screen parameters in the DDIC).
  • the parameters of the display screen are adjusted.
  • the adjusted display screen parameters may include Gamma parameters and Demura parameters, which are not limited in this embodiment.
  • the refresh frequency of the DDIC jumps from 45Hz to 72Hz without introducing a display delay mechanism.
  • the refresh frequency of the DDIC jumps from 51Hz to 72Hz.
  • the AP After introducing the display delay mechanism, before sending the seventh frame of image data to the DDIC, the AP determines that the historical refresh frequencies of the DDIC during the display of the fourth and fifth frames are 60 Hz and 45 Hz, respectively, so it is determined that the display delay condition is met.
  • the display delay operation is implemented, and the transmission of the seventh frame of image data to the DDIC is delayed, so that the refresh frequency of the DDIC is reduced to 60Hz during the display of the sixth frame of the image, that is, in the process of displaying the fifth and sixth frames of images, the DDIC’s Refresh frequency increased from 45Hz to 60Hz, but did not jump directly to 72Hz;
  • the AP displays the images based on the 12th and 13th frames
  • the historical refresh frequencies of the DDIC are 60Hz and 51Hz respectively, so it is determined that the display delay condition is satisfied, so that the transmission of the 15th frame of image data to the DDIC is delayed, so that the refresh rate of the DDIC is reduced to 60Hz during the display of the 14th frame of image, that is, in the display During the 13th and 14th frames, the refresh rate of DDIC increased from 51Hz to 60Hz, but did not jump directly to 72Hz.
  • the AP transmits the mth frame of image data to the DDIC, it determines whether the display delay condition is satisfied based on the historical refresh frequency of the DDIC during the display process of the latest n frames of images. , and when the display delay condition is satisfied, the image data of the m+1th frame is sent to the display delay operation, and then the image data of the m+1th frame is transmitted to the DDIC, so as to avoid the DDIC refresh frequency greatly increased due to the fluctuation of the output frame rate of the AP.
  • Jumping which leads to the problem of flickering and jittering of the picture, helps to improve the stability of the DDIC refresh frequency during the image display process, and achieves the effect of improving the image display quality.
  • the AP is used for image data transmission based on the rising edge of the multiple tearing effect Multiple-TE signal, and the Multiple-TE signal is output by the DDIC;
  • the historical refresh frequency of the DDIC for each frame image in the m-nth to m-1th frame images is determined.
  • obtain the historical number of Multiple-TE signals in the process of displaying each frame of image including:
  • the count value of the counter is updated, and the counter is used to record the Multiple output from the DDIC during the image display process of each frame - the number of TE signals;
  • the count value of the counter is determined as the historical number, and the count value of the counter is set to is 1.
  • determine the historical refresh frequency of DDIC based on the historical number including:
  • the historical refresh frequency is determined from the corresponding relationship between the number of TE signals and the refresh frequency.
  • the frequency of the Multiple-TE signal output by the DDIC is the TE frequency
  • the TE frequency is the same as the light-emitting EM frequency of the display screen, or the EM frequency is an integer multiple of the TE frequency.
  • the historical refresh frequency satisfies the delay condition of sending display
  • perform the display sending delay operation on the image data of the m+1th frame including:
  • the display delay operation is performed on the m+1th frame of image data.
  • the target refresh rate is the same as that of the foreground application during running to match the base frame rate.
  • the AP is used for image data transmission based on the rising edge of the Multiple-TE signal, and the Multiple-TE signal is output by the DDIC;
  • Perform display delay operation on the image data of the m+1th frame including:
  • the TE signal skip operation is performed, and the number threshold is set based on the target refresh frequency.
  • the TE signal skipping operation is performed, including:
  • the real-time continuous number is less than the number threshold, based on the difference between the number threshold and the real-time continuous number, determine the target skip quantity of the Multiple-TE signal;
  • the Multiple-TE signal output by the DDIC When the Multiple-TE signal output by the DDIC is received and the number of real-time skips does not reach the target number of skips, the Multiple-TE signal is skipped;
  • data transmission is performed between the AP and the DDIC through the mobile industry processor interface MIPI;
  • the method After transmitting the mth frame of image data to the DDIC, the method also includes:
  • Performing the display delay operation on the image data of the m+1th frame includes:
  • a second timer is started, and the MIPI is set to a blocking state within the timer duration of the second timer;
  • the timer durations of the first timer and the second timer are set based on the target refresh frequency.
  • the target refresh rate is i
  • the highest refresh rate required by the DDIC during the running of the foreground application is j, where j is greater than i;
  • Methods also include:
  • the timer duration of the first timer is less than 1/j
  • the sum of the timer duration of the first timer and the timer duration of the second timer is greater than 1/j and less than 1/i.
  • the method also includes:
  • the DDIC when the DDIC completes the image display based on the image data transmitted by the AP and is ready to display the next frame of image, it will output the TE signal.
  • the AP completes the preparation of the next frame of image data and detects the TE Signal, transmit the next frame of image data to DDIC.
  • the TE signal output by the DDIC is a Multiple-TE (multiple tearing effect) signal, that is, when the next frame of image is ready to be refreshed, the DDIC continuously outputs multiple TE signals according to a preset frequency.
  • the AP detects the rising edge of the TE signal, it transmits image data to the DDIC.
  • the AP By outputting the Multiple-TE signal (equivalent to increasing the probability that the AP can detect the rising edge of the TE signal), the AP can transmit the image data to the DDIC in time after the image data preparation is completed, which helps to reduce the image display delay.
  • the TE frequency of the Multiple-TE signal is the same as the emission (EM) frequency of the display screen, or the EM frequency is an integer multiple of the TE frequency.
  • the EM frequency of the display screen is 360Hz
  • the TE frequency of the Multiple-TE signal is 360Hz, that is, a Multiple-TE signal is output every 2.8ms (1000 ⁇ 360)
  • the TE frequency of the Multiple-TE signal is 180Hz , that is, output a Multiple-TE signal every 5.6ms.
  • the AP side can determine the historical refresh frequency of the DDIC by detecting the number of Multiple-TE signals output by the DDIC.
  • the process of determining the historical refresh frequency may include the following steps.
  • Step 302A for the m-nth to m-1th frames of images, acquire the historical number of Multiple-TE signals output by the DDIC during the display process of each frame of images.
  • the AP For each frame of images in the latest n frames of images, the AP counts the number of Multiple-TE signals output by the DDIC during the display process of each frame of images, and obtains the historical number corresponding to each frame of image, which is the AP transmission The number of Multiple-TE signals detected between two adjacent frames of image data.
  • the display process of a frame image includes the process of DDIC performing frame scanning, and the process of DDIC waiting for the next frame of image data after the frame scanning is completed (the process of maintaining the currently displayed image frame), because DDIC is not in the process of frame scanning
  • the Multiple-TE signal will not be output, so the interval between the Multiple-TE signals output by the DDIC after completing the scanning of two adjacent image frames (that is, the Multiple-TE signal output by the DDIC after completing the scanning of the previous image frame and the completed
  • the interval between the Multiple-TE signals output after one image frame scanning is significantly greater than the interval between two or more Multiple-TE signals output by the DDIC after completing the same image frame scanning.
  • the AP can use a counter to record the number of Multiple-TE signals during the display of each frame of images based on the time interval between adjacent Multiple-TE signals.
  • this step may include the following sub-steps.
  • the AP sets a counter, and uses the counter to record the number of Multiple-TE signals output by the DDIC during the display of each frame of image.
  • the initial count value of the counter is 0, and the counter can be set by calling the counting thread.
  • the AP starts the counter after completing the transmission of the image data corresponding to the image frame A.
  • the AP calculates the time interval (existence In the case of forwarding adjacent Multiple-TE signals), and check whether the time interval is smaller than the interval threshold. If it is less than, go to step 2; if it is larger, go to step 3.
  • the interval threshold is determined based on the TE frequency of the Multiple-TE signal, where, when the TE frequency is k, the interval threshold is slightly greater than 1/k. For example, when the TE frequency is 360 Hz, the interval threshold is 3 ms.
  • update the count value of the counter that is, add 1 to the current count value of the counter.
  • the TE signals are all output by the DDIC after scanning the frame of the same frame image, so as to add one to the count value of the counter.
  • the TE frequency 360 Hz
  • the interval threshold 3 ms.
  • the AP updates the count value of the counter to 1;
  • the time interval of 2.8ms is less than the interval threshold of 3ms, so the AP counts the counter The value is updated to 2.
  • the count value of the counter is updated from 1 to 4.
  • the count value of the counter is determined as the historical number, and the count value of the counter is set to is 1.
  • the AP determines the current count value of the counter as the historical number corresponding to the current frame image, and sets the count value of the counter to 1, so that the next frame image Statistics of the historical number of Multiple-TE signals during the display process.
  • the TE frequency 360Hz, and the interval threshold is 3ms.
  • the AP determines the history number corresponding to image frame A as 2, and sets the count value of the counter to 1; similarly, in image frame B
  • the AP sends the image frame B corresponding to The historical number is determined to be 4, and the count value of the counter is set to 1.
  • Step 302B determine the historical refresh frequency of the DDIC based on the historical number.
  • the corresponding relationship between the number of TE signals and the refresh frequency of the DDIC is preset in the terminal.
  • the AP determines the historical number based on the corresponding relationship.
  • the historical refresh frequency of the corresponding DDIC is preset in the terminal.
  • the AP determines that the historical refresh frequency of DDIC during the display of image frame A is 60 Hz, and determines that the historical refresh frequency of DDIC during the display of image frame B is 45 Hz.
  • the AP may also monitor the refresh frequency of the DDIC in other manners, which is not limited in this embodiment.
  • the refresh rate of DDIC should be designed to stabilize the frame with 60Hz as the target refresh rate, that is, the target refresh rate
  • the frequency matches the base frame rate while the foreground app is running.
  • the match between the target refresh rate and the reference frame rate means that the difference between the target refresh rate and the reference frame rate is less than a threshold (for example, 5FPS).
  • the target refresh rate is equal to the reference frame rate, or the target refresh rate is slightly lower than greater than the base frame rate, or, the target refresh rate is slightly less than the base frame rate.
  • the DDIC can wait appropriately to ensure that the refresh rate of the DDIC is not greater than the target refresh rate in most scenarios. range (such as 45Hz to 60Hz).
  • the AP when the AP prepares the image data in advance (that is, when there is a demand for acceleration), in order to avoid the DDIC’s refresh rate from directly jumping from a low refresh rate to a high refresh rate (that is, from a refresh rate lower than 60Hz to a refresh rate higher than 60Hz) Refresh frequency), in this application, the AP performs display delay operation.
  • the AP obtains the historical refresh frequency, it detects whether the historical refresh frequency is lower than the target refresh frequency. If the historical refresh frequency corresponding to at least one frame of image is less than the target refresh frequency, it is determined that the display delay condition is satisfied, and then the display delay operation is performed on the (m+1)th frame of image data.
  • the AP transmits the m+1th frame of image data to the DDIC.
  • the AP determines the base frame rate of the foreground application, so as to set the display delay condition based on the base frame rate.
  • the AP sets the display delay condition as follows: among the historical refresh rates corresponding to the last two frames of images, there is a historical refresh rate less than 60Hz. That is, as long as the historical refresh frequency corresponding to an image is less than 60Hz, the AP will perform the display delay operation; if the historical refresh frequency corresponding to two frames of images is not less than 60Hz, the AP does not need to perform the display delay operation.
  • the AP uses the skip TE signal The way to realize the display delay.
  • the following uses an exemplary embodiment for description.
  • FIG. 7 shows a flowchart of an image data transmission method provided by another exemplary embodiment of the present application.
  • the method includes:
  • Step 701 transmit the image data of the mth frame to the DDIC, where m is a positive integer.
  • Step 702 Determine the historical refresh frequency of the DDIC when displaying the m-nth to m-1th frames of images, where n is an integer less than m and greater than or equal to 2.
  • steps 701 to 702 reference may be made to the foregoing embodiments, and details are not repeated in this embodiment.
  • the AP transmits the image data of image frame C to the DDIC, it determines that the historical refresh frequency of the DDIC when displaying image frame A is 60 Hz, and that the historical refresh frequency of DDIC when displaying image frame B is 45 Hz.
  • Step 703 in the case that there is at least one frame of image whose historical refresh frequency is less than the target refresh frequency, and when the m+1th frame image data preparation is completed, determine the real-time duration of the Multiple-TE signal during the mth frame image display process number.
  • the AP detects the real-time continuous number of Multiple-TE signals generated by the DDIC before transmitting the image data of the m+1 frame to the DDIC (the image data of the m+1 frame has been prepared), and then determines the Whether to perform display delay operation.
  • the AP obtains the real-time count value of the counter to determine the real-time continuous number of Multiple-TE signals during the image display process of the m-th frame, so as to determine the output position of the current Multiple-TE signal.
  • the real-time continuous number is based on the real-time count value of the counter and the image frame corresponding to the real-time count value, wherein, the update method of the count value of the counter can refer to the above-mentioned embodiment, and this embodiment will not repeat it here.
  • the real-time continuous number of Multiple-TE signals during the m-frame image display process is the real-time count value of the counter; if the real-time count value of the counter The corresponding image frame is the m-1th frame image, and the real-time continuous number of Multiple-TE signals during the display process of the m-th frame image is 0.
  • Step 704 in the case that the real-time continuous number is less than the number threshold, perform a TE signal skip operation, and the number threshold is set based on the target refresh frequency.
  • the AP In order to prevent the refresh rate from jumping higher than the target refresh rate, the AP sets the number threshold based on the target refresh rate, and detects whether the real-time continuous number is less than the number threshold. If the real-time continuous number is less than the number threshold, it indicates that the image preparation of the m+1th frame is completed in advance. If the image data transmission is directly based on the next Multiple-TE signal, the refresh frequency will jump greatly, so the AP skips at least A Multiple-TE signal is used to achieve the effect of delayed display.
  • the DDIC scans the image at the target refresh rate
  • the number of Multiple-TE signals generated before scanning the next frame of image is the number threshold -1
  • the TE signal is skipped
  • the number of Multiple-TE signals skipped during operation is the difference between the number threshold and the real-time continuous number, that is, after the TE signal skip operation is completed, the refresh rate of the DDIC during the image display process of the mth frame is the target refresh rate.
  • the AP determines the target skip number of the Multiple-TE signal based on the difference between the number threshold and the real-time continuous number; when receiving the DDIC When the multiple-TE signal is output, and the number of real-time skips does not reach the target number of skips, the AP performs skip processing on the multiple-TE signal, that is, it does not transmit image data to the DDIC based on the multiple-TE signal. Further, the AP updates the real-time skip count, that is, adds one to the real-time skip count, so that when the Multiple-TE signal is detected again, the updated real-time skip count is compared with the target skip count.
  • the real-time continuous number is not less than the number threshold, it indicates that the image of the m+1th frame has not been prepared in advance, and the image data transmission is directly based on the next Multiple-TE signal, which will not cause a large jump in the refresh rate Change.
  • the AP determines that the number threshold is 1 (it can be determined by searching the correspondence between the refresh frequency and the number threshold). Since the real-time continuous number of Multiple-TE signals during the display of image frame C is 0, the AP skips the current Multiple-TE signal and only transmits the m+th signal to the DDIC when it detects the rising edge of the next Multiple-TE signal. 1 frame of image data (that is, transmit the m+1th frame of image data to DDIC with a delay of 2.8ms).
  • Step 705 when the TE signal skipping operation is completed, transmit the m+1th frame of image data to the DDIC.
  • the AP transmits the m+1th frame of image data to the DDIC when the next Multiple-TE signal is detected, so that the refresh rate of the DDIC during the mth frame of image display is the target Refresh frequency.
  • the AP skips the first Multiple-TE signal, when it detects the rising edge of the second Multiple-TE signal, it transmits the m+th 1 image data.
  • the change of DDIC refresh frequency is changed from 60Hz ⁇ 45Hz ⁇ 72Hz (without introducing the display delay mechanism) to 60Hz ⁇ 45Hz ⁇ 60Hz (introducing the display delay mechanism), avoiding the jump of refresh frequency.
  • the TE signal skips the operation, since the display interval between the current frame and the next frame is shortened, the refresh rate corresponding to the display display of the next frame is increased, thereby reducing the frequency of low refresh rates such as 45Hz and further improving The stability of the refresh rate is improved.
  • the AP since the data transmission between the AP and the DDIC is carried out through MIPI, when the historical refresh frequency satisfies the display delay condition and the m+1th frame of image data is ready to be provided, the AP can pass through the blocking MIPI implements display delay.
  • the following uses an exemplary embodiment for description.
  • FIG. 9 shows a flowchart of an image data transmission method according to another exemplary embodiment of the present application.
  • the method includes:
  • Step 901 transmit the image data of the mth frame to the DDIC, where m is a positive integer.
  • Step 902 start a first timer, wherein the MIPI is in the on-line state within the timer duration of the first timer.
  • the AP after transmitting the image data to the DDIC, the AP starts the first timer and ensures that the MIPI is in the pass state within the timer duration of the first timer, so that the AP can pass the MIPI during the frame scanning process. Instructions other than image data are transmitted to the DDIC, wherein the first timer can be started by the AP by calling a timing thread.
  • the AP starts the first timer after transmitting the image data of the image frame C to the DDIC.
  • Step 903 determine the historical refresh frequency of the DDIC when displaying the m-nth to m-1th frames of images, where n is an integer less than m and greater than or equal to 2.
  • the AP transmits the image data of image frame C to the DDIC, it determines that the historical refresh frequency of the DDIC when displaying image frame A is 60 Hz, and that the historical refresh frequency of DDIC when displaying image frame B is 45 Hz.
  • Step 904 In the case that there is at least one frame of image whose historical refresh rate is less than the target refresh rate, and when the timer duration of the first timer is reached, start the second timer, and Set MIPI to blocking state for a period of time.
  • the AP when the first timer reaches the timer duration, the AP sets the MIPI from the channel state to the blocking state, and starts the second timer to ensure that the MIPI remains in the blocking state within the timer duration of the second timer. Since MIPI is in the blocking state, the TE signal cannot be detected during the second timer period, so the AP cannot transmit the m+1th frame of image data to the DDIC during the second timer period, thus achieving the effect of delayed display.
  • the timer duration of the first timer and the timer duration of the second timer are set based on the target refresh frequency.
  • the target refresh frequency is i
  • the highest refresh frequency required by DDIC during the running of the foreground application is j
  • the timer duration of the first timer is less than 1/j
  • the first timer The sum of the timer duration of the second timer and the second timer is greater than 1/j and less than 1/i, so that MIPI enters the blocking state before the rising edge of the next TE signal, and makes the refresh of DDIC during the image display process of the mth frame Frequency is the target refresh rate.
  • the AP cannot transmit the image data of the image frame D to the DDIC within this period.
  • Step 905 when the timer duration of the second timer is reached, set the MIPI to the channel state, and transmit the m+1th frame of image data to the DDIC.
  • the AP when the timer duration of the second timer is reached, the AP resets the MIPI to the channel state, and when the next TE signal is detected, transmits the m+1th frame of image data to the DDIC, so that the mth frame of image
  • the refresh rate of DDIC during the display process is the target refresh rate.
  • the above-mentioned embodiment only takes the skipping TE signal and blocking MIPI as examples to illustrate.
  • the AP can delay the timing of sending the display in other ways. It is not limited to the specific delayed display mode.
  • FIG. 11 shows a structural block diagram of an image data transmission device provided by an embodiment of the present application.
  • the unit includes:
  • the transmission module 1101 is configured to transmit the mth frame of image data to the display driver chip DDIC, where m is a positive integer;
  • the first determination module 1102 is configured to determine the historical refresh frequency of the DDIC when displaying the m-nth to m-1th frame images, where n is an integer less than m and greater than or equal to 2;
  • the delay module 1103 is configured to perform a display delay operation on the m+1th frame of image data when the historical refresh frequency satisfies the display delay condition, and the display delay operation is used to delay transmission to the DDIC The m+1th frame of image data;
  • the transmission module 1101 is further configured to transmit the m+1th frame of image data to the DDIC when the display delay operation is completed.
  • the AP is used to transmit image data based on the rising edge of the multiple tearing effect Multiple-TE signal, and the Multiple-TE signal is output by the DDIC;
  • the first determining module 1102 includes:
  • the acquiring unit is configured to acquire, for the m-nth to m-1th frame images, the historical number of the Multiple-TE signals output by the DDIC during the display process of each frame image;
  • a determining unit configured to determine the historical refresh frequency of the DDIC for each frame image in the m-nth to m-1th frame images based on the historical number.
  • the acquisition unit is used for:
  • the count value of the counter is updated, and the counter is used to record the display process of each frame image The number of the Multiple-TE signals output by the DDIC;
  • the determining unit is used for:
  • the historical refresh frequency is determined from the correspondence between the number of TE signals and the refresh frequency.
  • the frequency at which the DDIC outputs the Multiple-TE signal is a TE frequency
  • the TE frequency is the same as the light-emitting EM frequency of the display screen, or the TE frequency is an integer multiple of the EM frequency.
  • the delay module 1103 is configured to:
  • the historical refresh frequency corresponding to at least one frame of image is less than the target refresh frequency, it is determined that the display delay condition is met, and the display delay operation is performed on the m+1th frame of image data, so
  • the above target refresh rate matches the base frame rate when the foreground application is running.
  • the AP is used to transmit image data based on the rising edge of the Multiple-TE signal, and the Multiple-TE signal is output by the DDIC;
  • the delay module 1103 includes:
  • the first delay unit is used to determine the real-time continuous number of the Multiple-TE signal during the m-th frame image display process when the m+1th frame of image data is ready; If the number threshold is less than the TE signal skipping operation, the number threshold is set based on the target refresh frequency.
  • the first delay unit is configured to:
  • the target skip number of the Multiple-TE signal In the case where the real-time continuous number is less than the number threshold, based on the difference between the number threshold and the real-time continuous number, determine the target skip number of the Multiple-TE signal;
  • the real-time skip quantity is updated.
  • data transmission is performed between the AP and the DDIC through a mobile industry processor interface MIPI;
  • the device also includes:
  • a timing module configured to start a first timer, wherein the MIPI is in a pass state within the timer duration of the first timer;
  • the delay module 1103 includes:
  • a second delay unit configured to start a second timer when the timer duration of the first timer is reached, and set the MIPI to a blocking state within the timer duration of the second timer ;
  • the timer durations of the first timer and the second timer are set based on the target refresh frequency.
  • the target refresh frequency is i
  • the highest refresh frequency required by the DDIC during the running of the foreground application is j, where j is greater than i;
  • the timer duration of the first timer and the second timer is less than 1/j
  • the sum of the timer duration of the first timer and the timer duration of the second timer is greater than 1/j and less than 1/i.
  • the device also includes:
  • a second determining module configured to determine the reference frame rate of the foreground application
  • a setting module configured to set the display delay condition based on the reference frame rate.
  • the AP transmits the mth frame of image data to the DDIC, it determines whether the display delay condition is satisfied based on the historical refresh frequency of the DDIC during the display process of the latest n frames of images. , and when the display delay condition is met, the m+1th frame image data is sent to the display delay operation, and then the m+1th frame image data is transmitted to the DDIC to avoid the DDIC refresh frequency jump due to the fluctuation of the AP output frame rate , which in turn leads to problems of screen flickering and jittering, which helps to improve the stability of the DDIC refresh frequency during the image display process, and achieves the effect of improving image display quality.
  • FIG. 12 shows a structural block diagram of a terminal 1200 provided by an exemplary embodiment of the present application.
  • the terminal 1200 may be a smart phone, a tablet computer, a notebook computer, and the like.
  • the terminal 1200 in this application may include one or more of the following components: a processor 1210 , a memory 1220 , and a display screen module 1230 .
  • the processor 1210 may include one or more processing cores, and the processor 1210 may be the AP described in the foregoing embodiments.
  • the processor 1210 uses various interfaces and lines to connect various parts of the entire terminal 1200, and executes the terminal by running or executing instructions, programs, code sets or instruction sets stored in the memory 1220, and calling data stored in the memory 1220. 1200 various functions and processing data.
  • the processor 1210 may adopt at least one of Digital Signal Processing (Digital Signal Processing, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), and Programmable Logic Array (Programmable Logic Array, PLA). implemented in the form of hardware.
  • DSP Digital Signal Processing
  • FPGA Field-Programmable Gate Array
  • PLA Programmable Logic Array
  • the processor 1210 can integrate one or more of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), a neural network processor (Neural-network Processing Unit, NPU) and a modem, etc.
  • a central processing unit Central Processing Unit, CPU
  • an image processor Graphics Processing Unit, GPU
  • a neural network processor Neural-network Processing Unit, NPU
  • the CPU mainly processes the operating system, user interface and application programs, etc.
  • the GPU is used for rendering and drawing the content that the touch display module 1230 needs to display
  • the NPU is used for realizing artificial intelligence (Artificial Intelligence, AI) functions
  • the modem Used to handle wireless communications. It can be understood that, the above-mentioned modem may not be integrated into the processor 1210, but may be implemented by a single chip.
  • the memory 1220 may include a random access memory (Random Access Memory, RAM), and may also include a read-only memory (Read-Only Memory, ROM).
  • the memory 1220 includes a non-transitory computer-readable storage medium.
  • the memory 1220 may be used to store instructions, programs, codes, sets of codes or sets of instructions.
  • the memory 1220 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like for implementing various method embodiments of the present application; the storage data area may store data created according to the use of the terminal 1200 (such as audio data, phone book) and the like.
  • the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like for implementing various method embodiments of the present application; the storage data area may store data created according to the use of the terminal 1200 (such as audio data, phone book) and the like.
  • the display screen module 1230 is a display component for displaying images, and is usually arranged on the front panel of the terminal 1200 .
  • the display module 1230 can be designed as a full screen, a curved screen, a special-shaped screen, a double-sided screen or a folding screen.
  • the display module 1230 can also be designed as a combination of a full screen and a curved screen, or a combination of a special-shaped screen and a curved screen, which is not limited in this embodiment.
  • the display screen module 1230 includes a DDIC 1231 and a display screen 1232 (panel).
  • the display screen 1232 may be an OLED display screen, which may be a low temperature polysilicon (Low Temperature Poly-Silicon, LTPS) AMOLED display screen or a low temperature polycrystalline oxide (Low Temperature Polycrystalline Oxide, LTPO) AMOLED display screen.
  • the DDIC1231 is used to drive the display screen 1232 to display images.
  • the DDIC 1231 is connected to the processor 1210 through a MIPI interface, and is used for receiving image data and instructions issued by the processor 1210 .
  • the display screen module 1230 also has a touch function, through which a user can use any suitable object such as a finger or a touch pen to perform a touch operation on the display screen module 1230 .
  • the structure of the terminal 1200 shown in the above drawings does not constitute a limitation on the terminal 1200, and the terminal may include more or less components than those shown in the figure, or combine some components, or different component arrangements.
  • the terminal 1200 also includes components such as a microphone, a speaker, a radio frequency circuit, an input unit, a sensor, an audio circuit, a wireless fidelity (Wireless Fidelity, WiFi) module, a power supply, and a bluetooth module, which will not be repeated here.
  • the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores at least one instruction, and the at least one instruction is used to be executed by a processor to realize image data transmission as described in the above-mentioned embodiments method.
  • the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

一种图像数据传输方法、装置、终端及介质。方法包括：向DDIC传输第m帧图像数据，m为正整数（301）；确定显示第m-n至第m-1帧图像时DDIC的历史刷新频率，n为小于m且大于等于2的整数（302）；在满足历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，送显延迟操作用于延迟向DDIC传输第m+1帧图像数据（303）；在完成送显延迟操作的情况下，向DDIC传输第m+1帧图像数据（304）。本申请实施例通过引入送显延迟机制，避免因AP输出帧率波动导致DDIC刷新频率跳变，以及画面闪烁和抖动的问题，提高了图像显示过程中DDIC刷新频率的稳定性，达到提升图像显示质量的效果。

Description

图像数据传输方法、装置、终端及介质
本申请要求于2021年9月15日提交的申请号为202111078949.X、发明名称为“图像数据传输方法、装置、终端及介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及显示技术领域，特别涉及一种图像数据传输方法、装置、终端及介质。
背景技术
随着显示屏技术的不断发展，越来越多能够支持高刷新频率显示的显示屏应运而生，在运行高帧率应用程序或在滑动操作过程中，通过将显示屏设置为高刷新频率模式能够提高画面的流畅度。
对于采用应用处理器(Application Processor，AP)-显示驱动芯片(Display Driver Integrated Circuit，DDIC)-显示面板(Panel)驱动架构的显示屏，图像显示过程中，DDIC根据AP的输出帧率(即输出图像数据的速率)自适应调整刷新频率，实现自适应变频。
然而，由于AP的输出帧率会在一定范围内波动，因此会导致DDIC的刷新频率波动，当刷新频率发生跳变时，比如刷新频率由45Hz跳变为72Hz时，会出现画面闪烁和抖动的问题，影响图像显示质量。
发明内容
本申请实施例提供了一种图像数据传输方法、装置、终端及介质。所述技术方案如下：
一方面，本申请实施例提供了一种图像数据传输方法，用于AP，所述方法包括：
向DDIC传输第m帧图像数据，m为正整数；
确定显示第m-n至第m-1帧图像时所述DDIC的历史刷新频率，n为小于m且大于等于2的整数；
在满足所述历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，所述送显延迟操作用于延迟向所述DDIC传输所述第m+1帧图像数据；
在完成所述送显延迟操作的情况下，向所述DDIC传输所述第m+1帧图像数据。
另一方面，本申请实施例提供了一种图像数据传输装置，所述装置包括：
传输模块，用于向DDIC传输第m帧图像数据，m为正整数；
第一确定模块，用于确定显示第m-n至第m-1帧图像时所述DDIC的历史刷新频率，n为小于m且大于等于2的整数；
延迟模块，用于在满足所述历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像 数据进行送显延迟操作，所述送显延迟操作用于延迟向所述DDIC传输所述第m+1帧图像数据；
所述传输模块，还用于在完成所述送显延迟操作的情况下，向所述DDIC传输所述第m+1帧图像数据。
另一方面，本申请实施例提供了一种终端，所述终端包括AP、显示屏和DDIC，所述AP与所述DDIC之间通过移动产业处理器接口(Mobile Industry Processor Interface，MIPI)相连，所述AP用于执行存储器中的至少一段程序以实现如上述图像数据传输方法。
另一方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有至少一段程序，所述至少一段程序用于被处理器执行以实现如上述图像数据传输方法。
另一方面，本申请实施例提供了一种计算机程序产品，该计算机程序产品包括计算机指令，该计算机指令存储在计算机可读存储介质中；终端的处理器从计算机可读存储介质读取该计算机指令，处理器执行该计算机指令，使得该终端执行上述方面提供的图像数据传输方法。
附图说明
图1示出了AP-DDCI-Panel架构下图像显示过程的示意图；
图2示出了本申请一个示例性实施例提供的图像数据传输方法的原理示意图；
图3示出了本申请一个示例性实施例提供的图像数据传输方法的流程图；
图4示出了引入送显延迟和未引入送显延迟机制时刷新频率的对比图；
图5示出了本申请一个示例性实施例提供的历史刷新频率确定过程的流程图；
图6示出了本申请一个示例性实施例提供的历史刷新频率确定过程的实施示意图；
图7示出了本申请另一个示例性实施例提供的图像数据传输方法的流程图；
图8示出了图7所示图像数据传输方法实施过程的实施示意图；
图9示出了本申请另一个示例性实施例示出的图像数据传输方法的流程图；
图10示出了图9所示图像数据传输方法实施过程的实施示意图；
图11示出了本申请一个实施例提供的图像数据传输装置的结构框图；
图12示出了本申请一个示例性实施例提供的终端的结构方框图。
具体实施方式
如图1所示，在AP-DDIC-Panel架构下，AP侧首先通过应用程序(Application，App)进行图层绘制渲染，然后通过SurfaceFlinger(图层合成者)对绘制得到的图层进行图层合成得到图像数据，进而通过MIPI将图像数据送显(写入)DDIC。DDIC将AP送显的图像数据存储在缓存器(Buffer)中，并通过扫描(读取)Buffer中的图像数据，控制Panel进行图像刷新显示(Display)。而在实现自适应变频时，DDIC会根据AP的输出帧率(即，AP在单位时间内向DDIC输送图像数据的数量，或者，AP向DDIC输送图像数据的速度)，自适应地调节刷新频率。比如，当AP的输出帧率降低时，DDIC下调刷新频率，而当AP的输出帧率 提高时，DDIC则上调刷新频率。
自适应变频过程中，刷新频率在短时内小范围变化不会对图像显示质量造成影响，而当刷新频率在短时内大范围变化时，则会出现闪烁抖动等问题，影响图像显示质量。
比如，在一些场景下，由于AP侧准备图像数据的速度存在波动，使得AP的输出帧率在短时内由60Hz变为45Hz，再由45Hz变为72Hz时，DDIC的刷新频率随之由60Hz变为45Hz时并不会造成画面闪烁抖动，而当DDIC的刷新频率由45Hz变为72Hz时，由于刷新频率变化幅度过大，因此会出现画面闪烁抖动。
为了解决上述技术问题，本申请实施例中，AP侧引入了送显延迟机制。在该机制下，如图2所示，AP获取最近n帧图像显示过程中DDIC的历史刷新频率(即显示最近n帧图像中各帧图像时DDIC的刷新频率)，并基于DDIC刷新频率稳定算法对该历史刷新频率进行送显延迟条件检测，从而在满足送显延迟条件时，对下一帧图像数据进行送显延迟操作，避免出现刷新频率大幅跳变的问题，达到稳定DDIC刷新频率的效果，进而减少因此带来的显示画面闪烁的问题。
比如，AP获取最近两帧图像显示过程中DDIC的历史刷新频率，当检测到最近两帧图像显示过程，DDIC的历史刷新频率分别为60Hz(最近第二帧图像的刷新频率)和45Hz(最近一帧图像的刷新频率)时，若AP在完成数据准备后直接向DDIC传输下一帧图像数据，DDIC的刷新频率将会变为72Hz；而引入送显延迟机制后，AP检测到DDIC的历史刷新频率满足送显延迟条件，从而在经过一定时长延迟后向DDIC传输下一帧图像数据，使DDIC的刷新频率变为60Hz，从而避免DDIC的刷新频率直接由45Hz大幅跳变到72Hz。
本申请实施例提供的方法应用于终端，且由终端中的AP执行上述图像数据传输方法。该终端可以包括智能手机、平板电脑、可穿戴式设备(比如智能手表)、便携式个人计算机、智能电视等等，本申请实施例并不对终端的具体类型进行限定。
请参考图3，其示出了本申请一个示例性实施例提供的图像数据传输方法的流程图。该方法包括：
步骤301，向DDIC传输第m帧图像数据，m为正整数。
在一种可能的实施方式中，AP与DDIC之间通过MIPI相连，完成图像数据准备后，AP通过MIPI向DDIC传输图像数据，由DDIC基于图像数据控制显示屏(Panel)进行图像显示。
步骤302，确定显示第m-n至第m-1帧图像时DDIC的历史刷新频率，n为小于m且大于等于2的整数。
为了避免DDIC的刷新频率发生跳变，在向DDIC传输下一帧图像数据(即第m+1帧图像数据)前，AP需要确定最近n帧图像(即第m-n至第m-1帧图像)显示过程中DDIC的历史刷新频率，以便后续基于历史刷新频率检测是否满足送显延迟条件。关于确定DDIC侧历史刷新频率的具体实施方式，后续实施例将进行详述。
在一种可能的实施方式中，图像显示过程中，AP实时监测每帧图像显示过程中DDIC的 刷新频率，并对离第m帧(当前显示帧)最近的n帧图像各自对应的刷新频率进行存储，即AP存储了最近n帧的历史刷新频率。在传输第m+1帧图像数据时，AP即获取存储的n个历史刷新频率。
在一个示意性的例子中，当m＝10，n＝2时，在显示第10帧图像的过程中且在传输第11帧图像数据前，AP确定第8帧图像显示过程中DDIC的第一历史刷新频率，以及第9帧图像显示过程中DDIC的第二历史刷新频率。
步骤303，在满足历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，送显延迟操作用于延迟向DDIC传输第m+1帧图像数据。
在一些实施例中，该送显延迟条件用于过滤AP侧的零散加速请求，避免DDIC直接由低刷新频率升至高刷新频率。其中，当AP侧的图像数据准备速度在短时间内突然变化时，AP即产生零散加速请求，且零散加速请求后AP侧准备图像数据的速度下降，无法长时间保持，该零散加速请求通常在AP侧准备图像帧数据出现延迟后出现。
在一种可能的实施方式中，AP基于最近n帧图像的历史刷新频率判断最近n帧图像是否存在图像准备延迟的情况，若存在图像准备延迟，则确定满足送显延迟条件，从而对第m+1帧图像数据进行送显延迟操作，避免在第m+1帧图像数据提前准备完成时，因AP立即向DDIC传输第m+1帧图像数据导致刷新频率跳变上升(因为前一帧送显延迟会使相邻两帧图像数据之间的下发间隔较短，进而导致刷新频率上升)。
本申请实施例中，送显延迟操作的目的是为了降低DDIC的刷新频率，从而避免在最近n帧图像存在图像准备延迟的情况下，因AP侧图像准备速度突然提升造成DDIC刷新频率跳变上升。
可选的，对第m+1帧图像数据进行送显延迟操作的方式可以包括跳过撕裂效应(Tearing Effect，TE)信号(Skip TE)或阻隔MIPI(MIPI Block)，下述实施例将对上述两种方式进行详述。
可选的，当最近n帧的历史刷新频率不满足送显延迟条件时，AP则无需对第m+1帧图像数据进行送显延迟操作，按照常规送显逻辑向DDIC传输第m+1帧图像数据。
步骤304，在完成送显延迟操作的情况下，向DDIC传输第m+1帧图像数据。
在一种可能的实施方式中，完成对第m+1帧图像数据的送显延迟操作后，AP根据DDIC输出的TE信号向DDIC传输第m+1帧图像数据。完成第m+1帧图像数据传输后，在传输第m+2帧图像数据前，AP重新执行上述步骤302至303，本实施例在此不再赘述。
可选的，DDIC的刷新频率发生变化时，为了避免频率变化对画面显示造成影响，DDIC根据帧寄存器(DDIC中用于存储刷新频率与显示屏参数间对应关系的寄存器)中刷新频率对应的显示屏参数进行参数调整，其中，调整的显示屏参数可以包括Gamma参数和Demura参数，本实施例对此不作限定。
在一个示意性的例子中，如图4所示，在未引入送显延迟机制的情况下，在显示第5帧和第6帧图像的过程中，DDIC的刷新频率由45Hz跳变为72Hz，在显示第13帧和第14帧图像的过程中，DDIC的刷新频率由51Hz跳变为72Hz。
而引入送显延迟机制后，向DDIC发送第7帧图像数据前，AP确定第4帧和第5帧图像显示过程中DDIC的历史刷新频率分别为60Hz和45Hz，故确定满足送显延迟条件，从而实行送显延迟操作，延迟向DDIC传输第7帧图像数据，使第6帧图像显示过程中DDIC的刷新频率降为60Hz，即在显示第5帧和第6帧图像的过程中，DDIC的刷新频率由45Hz上升为60Hz，而并未直接跳升至72Hz；又如：在引入送显延迟机制后，向DDIC发送第15帧图像数据前，AP基于第12帧和第13帧图像显示过程中DDIC的历史刷新频率分别为60Hz和51Hz，故确定满足送显延迟条件，从而延迟向DDIC传输第15帧图像数据，使第14帧图像显示过程中DDIC的刷新频率降为60Hz，即在显示第13帧和第14帧图像的过程中，DDIC的刷新频率由51Hz上升为60Hz，而并未直接跳升至72Hz。
综上所述，本申请实施例中，通过引入送显延迟机制，AP向DDIC传输第m帧图像数据后，基于最近n帧图像显示过程中DDIC的历史刷新频率，确定是否满足送显延迟条件，并在满足送显延迟条件时，对第m+1帧图像数据进行送显延迟操作后，再向DDIC传输第m+1帧图像数据，避免因AP的输出帧率波动导致DDIC刷新频率大幅跳变，进而导致画面闪烁和抖动的问题，有助于提高图像显示过程中DDIC刷新频率的稳定性，达到提升图像显示质量的效果。
可选的，AP用于基于多重撕裂效应Multiple-TE信号的上升沿进行图像数据传输，Multiple-TE信号由DDIC输出；
确定显示第m-n至第m-1帧图像时DDIC的历史刷新频率，包括：
对于第m-n至第m-1帧图像，获取各帧图像显示过程中，DDIC输出的Multiple-TE信号的历史个数；
基于历史个数确定DDIC对第m-n至第m-1帧图像中各帧图像的历史刷新频率。
可选的，获取各帧图像显示过程中Multiple-TE信号的历史个数，包括：
在检测到Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔小于间隔阈值的情况下，更新计数器的计数值，计数器用于记录各帧图像显示过程中DDIC输出的Multiple-TE信号的个数；
在检测到Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔大于间隔阈值的情况下，将计数器的所述计数值确定为历史个数，并将计数器的计数值置为1。
可选的，基于历史个数确定DDIC的历史刷新频率，包括：
基于历史个数，从TE信号个数与刷新频率之间的对应关系中确定历史刷新频率。
可选的，DDIC输出Multiple-TE信号的频率为TE频率，TE频率与显示屏的发光EM频率相同，或，EM频率为TE频率的整数倍。
可选的，在满足历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，包括：
在存在至少一帧图像对应的历史刷新频率小于目标刷新频率的情况下，确定满足送显延迟条件，并对第m+1帧图像数据进行送显延迟操作，目标刷新频率与前台应用运行过程中的基准帧率相匹配。
可选的，AP用于基于Multiple-TE信号的上升沿进行图像数据传输，Multiple-TE信号由DDIC输出；
对第m+1帧图像数据进行送显延迟操作，包括：
在第m+1帧图像数据准备完成的情况下，确定第m帧图像显示过程中Multiple-TE信号的实时持续个数；
在实时持续个数小于个数阈值的情况下，进行TE信号跳过操作，个数阈值基于目标刷新频率设置。
可选的，在实时持续个数小于个数阈值的情况下，进行TE信号跳过操作，包括：
在实时持续个数小于个数阈值的情况下，基于个数阈值与实时持续个数之差，确定Multiple-TE信号的目标跳过数量；
在接收到DDIC输出的Multiple-TE信号，且实时跳过数量未达到目标跳过数量的情况下，对Multiple-TE信号进行跳过处理；
更新实时跳过数量。
可选的，AP与所述DDIC之间通过移动产业处理器接口MIPI进行数据传输；
向DDIC传输第m帧图像数据之后，方法还包括：
启动第一定时器，其中，第一定时器的定时器时长内MIPI处于通路状态；
对第m+1帧图像数据进行所述送显延迟操作，包括：
在达到第一定时器的定时器时长的情况下，启动第二定时器，并在第二定时器的定时器时长内将MIPI设置为阻隔状态；
其中，第一定时器和第二定时器的定时器时长基于目标刷新频率设置。
可选的，目标刷新频率为i，前台应用运行过程中DDIC所需的最高刷新频率为j，j大于i；
方法还包括：
第一定时器的定时器时长小于1/j；
第一定时器的定时器时长与第二定时器的定时器时长之和大于1/j且小于1/i。
可选的，方法还包括：
确定前台应用的基准帧率；
基于基准帧率设置送显延迟条件。
在一种可能的实施方式中，DDIC基于AP传输的图像数据完成图像显示并准备好显示下一帧图像时，会输出TE信号，相应的，AP在完成下一帧图像数据准备且检测到TE信号时，向DDIC传输下一帧图像数据。本申请实施例中，DDIC输出的TE信号为Multiple-TE(多重撕裂效应)信号，即在准备好刷新下一帧图像时，DDIC按照预设频率连续输出多个TE信号。当AP检测到TE信号上升沿时，即向DDIC传输图像数据。通过输出Multiple-TE信号(相当于增加了AP能够检测到TE信号上升沿的概率)，使得AP在完成图像数据准备后，可以及时将图像数据传输至DDIC，有助于降低图像显示时延。
可选的，Multiple-TE信号的TE频率与显示屏的发光(Emission，EM)频率相同，或者，EM频率为TE频率的整数倍。比如，当显示屏的EM频率为360Hz时，Multiple-TE信号的TE频率为360Hz，即每隔2.8ms(1000÷360)输出一个Multiple-TE信号，或者，Multiple-TE信号的TE频率为180Hz，即每隔5.6ms输出一个Multiple-TE信号。本申请实施例并不对TE频率进行限定。相应的，AP侧可以通过检测DDIC输出的Multiple-TE信号的数量，确定DDIC的历史刷新频率。在一种可能的实施方式中，如图5所示，确定历史刷新频率的过程可以包括如下步骤。
步骤302A，对于第m-n至第m-1帧图像，获取各帧图像显示过程中，DDIC输出的Multiple-TE信号的历史个数。
对于最近n帧图像中的各帧图像，AP对各帧图像在显示过程中DDIC输出的Multiple-TE信号的数量进行统计，得到各帧图像对应的历史个数，该历史个数即为AP传输相邻两帧图像数据间检测到的Multiple-TE信号的数量。
一帧图像的显示过程包括DDIC进行帧扫描的过程，以及帧扫描完成后DDIC等待下一帧图像数据(这个过程中保持当前显示的图像帧)的过程，由于DDIC在进行帧扫描的过程中并不会输出Multiple-TE信号，因此DDIC完成相邻两帧图像帧扫描后分别输出的Multiple-TE信号之间的间隔(即，DDIC完成前一图像帧扫描后输出的Multiple-TE信号与完成后一帧图像帧扫描后输出的Multiple-TE信号之间的间隔)，明显大于DDIC完成同一帧图像帧扫描后输出的两个或多个Multiple-TE信号之间的间隔。基于上述特性，AP可以基于相邻Multiple-TE信号之间的时间间隔，并利用计数器对各帧图像显示过程中Multiple-TE信号的数量进行记录。
可选的，本步骤可以包括如下子步骤。
一、设置计数器。
AP设置计数器，利用该计数器记录各帧图像显示过程中DDIC输出的Multiple-TE信号的数量。其中，该计数器的初始计数值为0，且该计数器可以通过调用计数线程设置。
示意性的，如图6所示，AP完成图像帧A对应图像数据的传输后启动计数器。
每次检测到DDIC输出的Multiple-TE信号后，AP即计算该Multiple-TE信号与前向相邻Multiple-TE信号(即之前接收到的最近一个Multiple-TE信号)之间的时间间隔(存在前向相邻Multiple-TE信号的情况下)，并检测该时间间隔是否小于间隔阈值。若小于，则执行步骤二，若大于，则执行步骤三。
可选的，该间隔阈值基于Multiple-TE信号的TE频率确定得到，其中，当TE频率为k时，该间隔阈值略大于1/k。比如，当TE频率为360Hz时，该间隔阈值为3ms。
二、在检测到Multiple-TE信号，且Multiple-TE信号与前向相邻Multiple-TE信号之间的时间间隔小于间隔阈值的情况下，则更新计数器的计数值。
可选地，更新计数器的计数值，即，将该计数器当前的计数值+1。
当检测到Multiple-TE信号，且该Multiple-TE信号与前向相邻Multiple-TE信号之间的时间间隔小于间隔阈值时，表明当前检测到的Multiple-TE信号与前向相邻的Multiple-TE信号 均是由DDIC完成对同一帧图像的帧扫描后输出的，从而对计数器的计数值进行加一操作。
示意性的，如图6所示，TE频率＝360Hz，间隔阈值为3ms，在图像帧A的显示过程中，首次检测到Multiple-TE信号时，AP将计数器的计数值更新为1；当再次检测到Multiple-TE信号时，由于此时检测到Multiple-TE信号与上一Multiple-TE信号之间的时间间隔为2.8ms，故该时间间隔2.8ms小于间隔阈值3ms，因此AP将计数器的计数值更新为2。类似的，在图像帧B的显示过程中，计数器的计数值由1更新至4。
三、在检测到Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔大于间隔阈值的情况下，将计数器的计数值确定为历史个数，并将计数器的计数值置为1。
当检测到Multiple-TE信号，且该Multiple-TE信号与前向相邻Multiple-TE信号之间的时间间隔大于间隔阈值时，表明当前检测到的Multiple-TE信号与前向相邻Multiple-TE信号由DDIC完成对相邻帧图像的帧扫描后输出，因此AP将计数器当前的计数值确定为当前帧图像对应的历史个数，并将计数器的计数值置为1，以便对下一帧图像显示过程中Multiple-TE信号的历史个数进行统计。
示意性的，如图6所示，TE频率＝360Hz，间隔阈值为3ms，在图像帧A的显示过程中，在计数器的计数值为2的情况下，当再次检测到Multiple-TE信号时，由于与上一Multiple-TE信号之间的时间间隔大于时间阈值，因此AP将图像帧A对应的历史个数确定为2，并将计数器的计数值设置为1；类似的，在图像帧B的显示过程中，在计数器的计数值为4的情况下，当再次检测到Multiple-TE信号时，由于与上一Multiple-TE信号之间的时间间隔大于时间阈值，因此AP将图像帧B对应的历史个数确定为4，并将计数器的计数值设置为1。
步骤302B，基于历史个数确定DDIC的历史刷新频率。
在一种可能的实施方式中，终端中预先设置有TE信号个数与DDIC的刷新频率之间的对应关系，相应的，确定出历史个数后，AP即基于该对应关系，确定历史个数对应的DDIC的历史刷新频率。
示意性的，TE信号个数与DDIC的刷新频率之间的对应关系如表一所示。
表一
TE信号个数 DDIC的刷新频率
1 72Hz
2 60Hz
3 51Hz
4 45Hz
结合表一所示的对应关系，如图6所示，AP确定图像帧A显示过程中DDIC的历史刷新频率为60Hz，确定图像帧B显示过程中DDIC的历史刷新频率为45Hz。
需要说明的是，在其他可能的实施方式中，AP还可以采用其他方式监测DDIC的刷新频率，本实施例对此并不构成限定。
在一种可能的场景下，当前台应用运行过程中的基准帧率为60FPS(Frame Per Second， 帧每秒)时，DDIC的刷新频率应该以60Hz为目标刷新频率进行稳帧设计，即目标刷新频率与前台应用运行过程中的基准帧率相匹配。其中，目标刷新频率与基准帧率相匹配是指目标刷新频率与基准帧率之间的差值小于阈值(比如5FPS)，可选的，目标刷新频率等于基准帧率，或，目标刷新频率略大于基准帧率，或，目标刷新频率略小于基准帧率。
其中，当AP准时准备好图像数据(即按照60Hz的频率)或者延迟准备完毕(即小于60Hz)时，DDIC可以适当进行等待，保证DDIC的刷新频率在大多数场景下保持在不大于目标刷新频率的范围内(比如45Hz至60Hz)。
而当AP提前准备好图像数据时(即存在加速需求时)，为了避免DDIC的刷新频率由低刷新频率直接跳变为高刷新频率(即由低于60Hz的刷新频率跳变为高于60Hz的刷新频率)，在本申请中，AP进行送显延迟操作。
由于刷新频率跳变发生在历史刷新频率较低而当前刷新频率较高的情况下，因此在一种可能的实施方式中，AP获取到历史刷新频率后，检测历史刷新频率是否小于目标刷新频率。若存在至少一帧图像对应的历史刷新频率小于目标刷新频率，则确定满足送显延迟条件，进而对第m+1帧图像数据进行送显延迟操作。
若各帧图像对应的历史刷新频率均大于等于目标刷新频率，则确定不满足送显延迟条件，从而按照常规送显逻辑向DDIC传输第m+1帧图像数据(即检测到Multiple-TE信号的上升沿时，AP向DDIC传输第m+1帧图像数据)。
由于不同应用对应的基准帧率不同，因此需要针对不同应用设置不同的目标刷新频率。在一种可能的实施方式中，图像数据传输前，AP确定前台应用的基准帧率，从而基于基准帧率设置送显延迟条件。
在一个示意性的例子中，当前台应用为游戏应用，且游戏应用的基准帧率为60FPS时，AP设置送显延迟条件为：最近2帧图像对应的历史刷新频率中，存在历史刷新频率小于60Hz。即只要存在图像对应的历史刷新频率小于60Hz，AP即进行送显延迟操作；若两帧图像对应的历史刷新频率均不小于60Hz，AP则无需进行送显延迟操作。
关于对图像数据进行送显延迟操作的具体方式，在一种可能的实施方式中，当历史刷新频率满足送显延迟条件，且第m+1帧图像数据准备完毕时，AP采用跳过TE信号的方式实现送显延迟。下面采用示例性的实施例进行说明。
请参考图7，其示出了本申请另一个示例性实施例提供的图像数据传输方法的流程图。该方法包括：
步骤701，向DDIC传输第m帧图像数据，m为正整数。
步骤702，确定显示第m-n至第m-1帧图像时DDIC的历史刷新频率，n为小于m且大于等于2的整数。
步骤701至702的实施方式可以参考上述实施例，本实施例在此不再赘述。
示意性的，如图8所示，AP向DDIC传输图像帧C的图像数据后，确定显示图像帧A时DDIC的历史刷新频率为60Hz，显示图像帧B时DDIC的历史刷新频率为45Hz。
步骤703，在存在至少一帧图像对应的历史刷新频率小于目标刷新频率的情况下，且在第m+1帧图像数据准备完成时，确定第m帧图像显示过程中Multiple-TE信号的实时持续个数。
当满足延迟送显条件时，AP在向DDIC传输第m+1帧图像数据前(第m+1帧图像数据已准备完毕)，检测DDIC产生的Multiple-TE信号的实时持续个数，进而确定是否需要进行送显延迟操作。
在一种可能的实施方式中，AP通过获取计数器的实时计数值，确定第m帧图像显示过程中Multiple-TE信号的实时持续个数，以此确定当前Multiple-TE信号的输出位置。其中，该实时持续个数基于计数器的实时计数值以及实时计数值对应的图像帧，其中，计数器的计数值的更新方式可以参考上述实施例，本实施例在此不再赘述。
可选的，若计数器的实时计数值对应的图像帧为第m帧图像，第m帧图像显示过程中Multiple-TE信号的实时持续个数即为计数器的实时计数值；若计数器的实时计数值对应的图像帧为第m-1帧图像，第m帧图像显示过程中Multiple-TE信号的实时持续个数即为0。
示意性的，如图8所示，图像帧D的图像数据准备完成时，DDIC在对图像帧C进行帧扫描，此时计数器的实时计数值对应的图像帧为图像帧B，而非图像帧C，因此图像帧C显示过程中Multiple-TE信号的实时持续个数为0，即在DDIC输出Multiple-TE信号前图像帧D的图像数据就已经准备完成。
步骤704，在实时持续个数小于个数阈值的情况下，进行TE信号跳过操作，个数阈值基于目标刷新频率设置。
为了避免刷新频率跳变至高于目标刷新频率，AP基于目标刷新频率设置个数阈值，并检测实时持续个数是否小于个数阈值。若实时持续个数小于个数阈值，则表明第m+1帧图像提前准备完成，若直接基于下一个Multiple-TE信号进行图像数据传输，会造成刷新频率大幅度跳变，因此AP跳过至少一个Multiple-TE信号，以此达到延迟送显的效果。
可选的，DDIC以目标刷新频率扫描图像时，图像扫描完成后，在扫描下一帧图像之前生成的Multiple-TE信号的个数即为个数阈值-1，相应的，进行TE信号跳过操作时跳过的Multiple-TE信号的数量为个数阈值与实时持续个数之差，即完成TE信号跳过操作后，第m帧图像显示过程中DDIC的刷新频率为目标刷新频率。
在一种可能的实施方式中，在实时持续个数小于个数阈值的情况下，AP基于个数阈值与实时持续个数之差，确定Multiple-TE信号的目标跳过数量；当接收到DDIC输出的Multiple-TE信号，且实时跳过数量未达到目标跳过数量时，AP对Multiple-TE信号进行跳过处理，即不会根据该Multiple-TE信号向DDIC传输图像数据。进一步的，AP更新实时跳过数量，即对实时跳过数量进行加一操作，以便再次检测到Multiple-TE信号时，将更新后的实时跳过数量与目标跳过数量进行对比。
可选的，若实时持续个数不小于个数阈值，则表明第m+1帧图像未提前准备完成，直接基于下一个Multiple-TE信号进行图像数据传输，并不会造成刷新频率大幅度跳变。
示意性的，如图8所示，当目标刷新频率为60Hz时，AP确定个数阈值为1个(可以通 过查找刷新频率与个数阈值之间的对应关系确定得到)。由于图像帧C显示过程中Multiple-TE信号的实时持续个数为0个，因此AP跳过当前Multiple-TE信号，在检测到下一个Multiple-TE信号的上升沿时才向DDIC传输第m+1帧图像数据(即延迟2.8ms向DDIC传输第m+1帧图像数据)。
步骤705，在完成TE信号跳过操作的情况下，向DDIC传输第m+1帧图像数据。
可选的，完成TE信号跳过操作后，AP即在检测到下一个Multiple-TE信号时，向DDIC传输第m+1帧图像数据，使第m帧图像显示过程中DDIC的刷新频率为目标刷新频率。
示意性的，如图8所示，引入送显延迟机制后，AP跳过第一个Multiple-TE信号后，在检测到第二个Multiple-TE信号的上升沿时，向DDIC传输第m+1图像数据。通过TE信号跳过操作，DDIC刷新频率的变化情况由60Hz→45Hz→72Hz(未引入送显延迟机制)变为60Hz→45Hz→60Hz(引入送显延迟机制)，避免刷新频率的跳变。此外，TE信号跳过操作后，由于当前帧与下一帧之间的送显间隔缩短，因此下一帧送显所对应的刷新频率提升，从而减少45Hz等低刷新频率的出现频次，进一步提高了刷新频率的稳定性。
在另一种可能的实施方式中，由于AP与DDIC之间通过MIPI进行数据传输，因此当历史刷新频率满足送显延迟条件，且第m+1帧图像数据提供准备完毕时，AP可以通过阻隔MIPI实现送显延迟。下面采用示例性的实施例进行说明。
请参考图9，其示出了本申请另一个示例性实施例示出的图像数据传输方法的流程图。该方法包括：
步骤901，向DDIC传输第m帧图像数据，m为正整数。
步骤902，启动第一定时器，其中，第一定时器的定时器时长内MIPI处于通路状态。
在一种可能的实施方式中，向DDIC传输图像数据后，AP即启动第一定时器，并保证第一定时器的定时器时长内MIPI处于通路状态，使AP能够在帧扫描过程中通过MIPI向DDIC传输图像数据以外的指令，其中，第一定时器可以由AP通过调用定时线程启动。
示意性的，如图10所示，AP向DDIC传输图像帧C的图像数据后启动第一定时器。
步骤903，确定显示第m-n至第m-1帧图像时DDIC的历史刷新频率，n为小于m且大于等于2的整数。
示意性的，如图10所示，AP向DDIC传输图像帧C的图像数据后，确定显示图像帧A时DDIC的历史刷新频率为60Hz，显示图像帧B时DDIC的历史刷新频率为45Hz。
步骤904，在存在至少一帧图像对应的历史刷新频率小于目标刷新频率的情况下，且在达到第一定时器的定时器时长时，启动第二定时器，并在第二定时器的定时器时长内将MIPI设置为阻隔状态。
本实施例中，在第一定时器达到定时器时长时，AP将MIPI由通路状态设置为阻隔状态，并启动第二定时器，保证在第二定时器的定时器时长内MIPI保持阻隔状态。由于MIPI处于阻隔状态，故无法在第二定时器期间内检测到TE信号，因此AP无法在第二定时器期间向DDIC传输第m+1帧图像数据，从而达到了延时送显的效果。
其中，第一定时器的定时器时长和第二定时器的定时器时长基于目标刷新频率设置。在一种可能的实施方式中，当目标刷新频率为i，前台应用运行过程中DDIC所需的最高刷新频率为j时，第一定时器的定时器时长小于1/j，且第一定时器和第二定时器的定时器时长之和大于1/j且小于1/i，从而使得MIPI在下一个TE信号的上升沿之前进入阻隔状态，并使在第m帧图像显示过程中，DDIC的刷新频率为目标刷新频率。
示意性的，如图10所示，当前台应用运行的目标刷新频率为60Hz，前台应用运行过程中DDIC所需的最高刷新频率为72Hz时，AP设置第一定时器的定时器时长为13ms(小于1000÷72＝13.9ms)，并设置第二定时器的定时器时长为2ms(第一定时器的定时器时长与第二定时器的定时器时长之和为15ms，15ms小于1000÷60＝16.7ms)。在第二定时器期间内，由于MIPI处于阻隔状态，因此AP无法在这期间内向DDIC传输图像帧D的图像数据。
步骤905，在达到第二定时器的定时器时长的情况下，将MIPI设置为通路状态，并向DDIC传输第m+1帧图像数据。
可选的，达到第二定时器的定时器时长时，AP将MIPI重新设置为通路状态，并在检测到下一个TE信号时，向DDIC传输第m+1帧图像数据，使第m帧图像显示过程中DDIC的刷新频率为目标刷新频率。
示意性的，如图10所示，当达到第二定时器的定时器时长后，将MIPI恢复通路状态，AP在检测到DDIC输出的下一个TE信号时，向DDIC传输图像帧D的图像数据。
需要说明的是，上述实施例仅以跳过TE信号和阻隔MIPI两种延迟送显方式为例进行说明，在其他可能的实施方式中，AP可以通过其他方式延迟送显时机，本申请实施例并不对具体延迟送显方式构成限定。
请参考图11，其示出了本申请一个实施例提供的图像数据传输装置的结构框图。该装置包括：
传输模块1101，用于向显示驱动芯片DDIC传输第m帧图像数据，m为正整数；
第一确定模块1102，用于确定显示第m-n至第m-1帧图像时所述DDIC的历史刷新频率，n为小于m且大于等于2的整数；
延迟模块1103，用于在满足所述历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，所述送显延迟操作用于延迟向所述DDIC传输所述第m+1帧图像数据；
所述传输模块1101，还用于在完成所述送显延迟操作的情况下，向所述DDIC传输所述第m+1帧图像数据。
可选的，所述AP用于基于多重撕裂效应Multiple-TE信号的上升沿进行图像数据传输，所述Multiple-TE信号由所述DDIC输出；
所述第一确定模块1102，包括：
获取单元，用于对于所述第m-n至第m-1帧图像，获取各帧图像显示过程中，所述DDIC输出的所述Multiple-TE信号的历史个数；
确定单元，用于基于所述历史个数确定所述DDIC对第m-n至第m-1帧图像中各帧图像的所述历史刷新频率。
可选的，所述获取单元，用于：
在检测到所述Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔小于间隔阈值的情况下，更新计数器的计数值，所述计数器用于记录各帧图像显示过程中DDIC输出的所述Multiple-TE信号的个数；
在检测到所述Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔大于所述间隔阈值的情况下，将所述计数器的所述计数值确定为所述历史个数，并将所述计数器的所述计数值置为1。
可选的，所述确定单元，用于：
基于所述历史个数，从TE信号个数与刷新频率之间的对应关系中确定所述历史刷新频率。
可选的，所述DDIC输出Multiple-TE信号的频率为TE频率，所述TE频率与显示屏的发光EM频率相同，或，所述TE频率为所述EM频率的整数倍。
可选的，所述延迟模块1103，用于：
在存在至少一帧图像对应的所述历史刷新频率小于目标刷新频率的情况下，确定满足所述送显延迟条件，并对所述第m+1帧图像数据进行所述送显延迟操作，所述目标刷新频率与前台应用运行过程中的基准帧率相匹配。
可选的，所述AP用于基于Multiple-TE信号的上升沿进行图像数据传输，所述Multiple-TE信号由所述DDIC输出；
所述延迟模块1103，包括：
第一延迟单元，用于在所述第m+1帧图像数据准备完成的情况下，确定第m帧图像显示过程中所述Multiple-TE信号的实时持续个数；在所述实时持续个数小于个数阈值的情况下，进行TE信号跳过操作，所述个数阈值基于所述目标刷新频率设置。
可选的，所述第一延迟单元，用于：
在所述实时持续个数小于所述个数阈值的情况下，基于所述个数阈值与所述实时持续个数之差，确定Multiple-TE信号的目标跳过数量；
在接收到所述DDIC输出的所述Multiple-TE信号，且实时跳过数量未达到所述目标跳过数量的情况下，对所述Multiple-TE信号进行跳过处理；
更新所述实时跳过数量。
可选的，所述AP与所述DDIC之间通过移动产业处理器接口MIPI进行数据传输；
所述装置还包括：
定时模块，用于启动第一定时器，其中，所述第一定时器的定时器时长内所述MIPI处于通路状态；
所述延迟模块1103，包括：
第二延迟单元，用于在达到所述第一定时器的定时器时长的情况下，启动第二定时器， 并在所述第二定时器的定时器时长内将所述MIPI设置为阻隔状态；
其中，所述第一定时器和所述第二定时器的定时器时长基于所述目标刷新频率设置。
可选的，所述目标刷新频率为i，所述前台应用运行过程中所述DDIC所需的最高刷新频率为j，j大于i；
所以第一定时器和所述第二定时器的定时器时长小于1/j；
所述第一定时器的定时器时长与所述第二定时器的定时器时长之和大于1/j且小于1/i。
可选的，所述装置还包括：
第二确定模块，用于确定所述前台应用的所述基准帧率；
设置模块，用于基于所述基准帧率设置所述送显延迟条件。
综上所述，本申请实施例中，通过引入送显延迟机制，AP向DDIC传输第m帧图像数据后，基于最近n帧图像显示过程中DDIC的历史刷新频率，确定是否满足送显延迟条件，并在满足送显延迟条件时，对第m+1帧图像数据进行送显延迟操作后，再向DDIC传输第m+1帧图像数据，避免因AP输出帧率波动导致DDIC刷新频率跳变，进而导致画面闪烁和抖动的问题，有助于提高图像显示过程中DDIC刷新频率的稳定性，达到提升图像显示质量的效果。
请参考图12，其示出了本申请一个示例性实施例提供的终端1200的结构方框图。该终端1200可以是智能手机、平板电脑、笔记本电脑等。本申请中的终端1200可以包括一个或多个如下部件：处理器1210、存储器1220、显示屏模组1230。
处理器1210可以包括一个或者多个处理核心，该处理器1210可以为上述实施例中所述的AP。处理器1210利用各种接口和线路连接整个终端1200内的各个部分，通过运行或执行存储在存储器1220内的指令、程序、代码集或指令集，以及调用存储在存储器1220内的数据，执行终端1200的各种功能和处理数据。可选地，处理器1210可以采用数字信号处理(Digital Signal Processing，DSP)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)、可编程逻辑阵列(Programmable Logic Array，PLA)中的至少一种硬件形式来实现。处理器1210可集成中央处理器(Central Processing Unit，CPU)、图像处理器(Graphics Processing Unit，GPU)、神经网络处理器(Neural-network Processing Unit，NPU)和调制解调器等中的一种或几种的组合。其中，CPU主要处理操作系统、用户界面和应用程序等；GPU用于负责触摸显示屏模组1230所需要显示的内容的渲染和绘制；NPU用于实现人工智能(Artificial Intelligence，AI)功能；调制解调器用于处理无线通信。可以理解的是，上述调制解调器也可以不集成到处理器1210中，单独通过一块芯片进行实现。
存储器1220可以包括随机存储器(Random Access Memory，RAM)，也可以包括只读存储器(Read-Only Memory，ROM)。可选地，该存储器1220包括非瞬时性计算机可读介质(non-transitory computer-readable storage medium)。存储器1220可用于存储指令、程序、代码、代码集或指令集。存储器1220可包括存储程序区和存储数据区，其中，存储程序区可存储用于实现操作系统的指令、用于至少一个功能的指令(比如触控功能、声音播放功能、图 像播放功能等)、用于实现本申请各个方法实施例的指令等；存储数据区可存储根据终端1200的使用所创建的数据(比如音频数据、电话本)等。
显示屏模组1230是用于进行图像显示的显示组件，通常设置在终端1200的前面板。显示屏模组1230可被设计成为全面屏、曲面屏、异型屏、双面屏或折叠屏。显示屏模组1230还可被设计成为全面屏与曲面屏的结合，异型屏与曲面屏的结合，本实施例对此不加以限定。
本申请实施例中，显示屏模组1230包括DDIC1231和显示屏1232(面板)。其中，显示屏1232可以为OLED显示屏，其可以是低温多晶硅(Low Temperature Poly-Silicon，LTPS)AMOLED显示屏或低温多晶氧化物(Low Temperature Polycrystalline Oxide，LTPO)AMOLED显示屏。
DDIC1231用于驱动显示屏1232进行图像显示。此外，DDIC1231与处理器1210之间通过MIPI接口相连，用于接收处理器1210下发的图像数据以及指令。
在一种可能的实现方式中，该显示屏模组1230还具有触控功能，通过触控功能，用户可以使用手指、触摸笔等任何适合的物体在显示屏模组1230上进行触控操作。
除此之外，本领域技术人员可以理解，上述附图所示出的终端1200的结构并不构成对终端1200的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。比如，终端1200中还包括麦克风、扬声器、射频电路、输入单元、传感器、音频电路、无线保真(Wireless Fidelity，WiFi)模块、电源、蓝牙模块等部件，在此不再赘述。
本申请实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质存储有至少一条指令，所述至少一条指令用于被处理器执行以实现如上述实施例所述图像数据传输方法。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (25)

  1. 一种图像数据传输方法，用于应用处理器AP，所述方法包括：
    向显示驱动芯片DDIC传输第m帧图像数据，m为正整数；
    确定显示第m-n至第m-1帧图像时所述DDIC的历史刷新频率，n为小于m且大于等于2的整数；
    在满足所述历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，所述送显延迟操作用于延迟向所述DDIC传输所述第m+1帧图像数据；
    在完成所述送显延迟操作的情况下，向所述DDIC传输所述第m+1帧图像数据。
  2. 根据权利要求1所述的方法，其中，所述AP用于基于多重撕裂效应Multiple-TE信号的上升沿进行图像数据传输，所述Multiple-TE信号由所述DDIC输出；
    所述确定显示第m-n至第m-1帧图像时所述DDIC的历史刷新频率，包括：
    对于所述第m-n至第m-1帧图像，获取各帧图像显示过程中，所述DDIC输出的所述Multiple-TE信号的历史个数；
    基于所述历史个数确定所述DDIC对第m-n至第m-1帧图像中各帧图像的所述历史刷新频率。
  3. 根据权利要求2所述的方法，其中，所述获取各帧图像显示过程中所述Multiple-TE信号的历史个数，包括：
    在检测到所述Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔小于间隔阈值的情况下，更新计数器的计数值，所述计数器用于记录各帧图像显示过程中DDIC输出的所述Multiple-TE信号的个数；
    在检测到所述Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔大于所述间隔阈值的情况下，将所述计数器的所述计数值确定为所述历史个数，并将所述计数器的所述计数值置为1。
  4. 根据权利要求2所述的方法，其中，所述基于所述历史个数确定所述DDIC的所述历史刷新频率，包括：
    基于所述历史个数，从TE信号个数与刷新频率之间的对应关系中确定所述历史刷新频率。
  5. 根据权利要求2所述的方法，其中，所述DDIC输出Multiple-TE信号的频率为TE频率，所述TE频率与显示屏的发光EM频率相同，或，所述EM频率为所述TE频率的整数倍。
  6. 根据权利要求1至5任一所述的方法，其中，所述响应于所述历史刷新频率满足送显延迟条件，对第m+1帧图像数据进行送显延迟操作，包括：
    在存在至少一帧图像对应的所述历史刷新频率小于目标刷新频率的情况下，确定满足所述送显延迟条件，并对所述第m+1帧图像数据进行所述送显延迟操作，所述目标刷新频率与前台应用运行过程中的基准帧率相匹配。
  7. 根据权利要求6所述的方法，其中，所述AP用于基于Multiple-TE信号的上升沿进行图像数据传输，所述Multiple-TE信号由所述DDIC输出；
    所述对所述第m+1帧图像数据进行所述送显延迟操作，包括：
    在所述第m+1帧图像数据准备完成的情况下，确定第m帧图像显示过程中所述Multiple-TE信号的实时持续个数；
    在所述实时持续个数小于个数阈值的情况下，进行TE信号跳过操作，所述个数阈值基于所述目标刷新频率设置。
  8. 根据权利要求7所述的方法，其中，所述响应于所述实时持续个数小于个数阈值，进行TE信号跳过操作，包括：
    在所述实时持续个数小于所述个数阈值的情况下，基于所述个数阈值与所述实时持续个数之差，确定Multiple-TE信号的目标跳过数量；
    在接收到所述DDIC输出的所述Multiple-TE信号，且实时跳过数量未达到所述目标跳过数量的情况下，对所述Multiple-TE信号进行跳过处理；
    更新所述实时跳过数量。
  9. 根据权利要求6所述的方法，其中，所述AP与所述DDIC之间通过移动产业处理器接口MIPI进行数据传输；
    所述向DDIC传输第m帧图像数据之后，所述方法还包括：
    启动第一定时器，其中，所述第一定时器的定时器时长内所述MIPI处于通路状态；
    所述对所述第m+1帧图像数据进行所述送显延迟操作，包括：
    在达到所述第一定时器的定时器时长的情况下，启动第二定时器，并在所述第二定时器的定时器时长内将所述MIPI设置为阻隔状态；
    其中，所述第一定时器和所述第二定时器的定时器时长基于所述目标刷新频率设置。
  10. 根据权利要求9所述的方法，其中，所述目标刷新频率为i，所述前台应用运行过程中所述DDIC所需的最高刷新频率为j，j大于i；
    所以第一定时器的定时器时长小于1/j；
    所述第一定时器的定时器时长与所述第二定时器的定时器时长之和大于1/j且小于1/i。
  11. 根据权利要求6所述的方法，所述方法还包括：
    确定所述前台应用的所述基准帧率；
    基于所述基准帧率设置所述送显延迟条件。
  12. 一种图像数据传输装置，所述装置包括：
    传输模块，用于向显示驱动芯片DDIC传输第m帧图像数据，m为正整数；
    第一确定模块，用于确定显示第m-n至第m-1帧图像时所述DDIC的历史刷新频率，n为小于m且大于等于2的整数；
    延迟模块，用于在所述历史刷新频率满足送显延迟条件的情况下，对第m+1帧图像数据进行送显延迟操作，所述送显延迟操作用于延迟向所述DDIC传输所述第m+1帧图像数据；
    所述传输模块，还用于在完成所述送显延迟操作的情况下，向所述DDIC传输所述第m+1帧图像数据。
  13. 根据权利要求12所述的装置，其中，所述AP用于基于多重撕裂效应Multiple-TE信号的上升沿进行图像数据传输，所述Multiple-TE信号由所述DDIC输出；
    所述第一确定模块，包括：
    获取单元，用于对于所述第m-n至第m-1帧图像，获取各帧图像显示过程中，所述DDIC输出的所述Multiple-TE信号的历史个数；
    确定单元，用于基于所述历史个数确定所述DDIC对第m-n至第m-1帧图像中各帧图像的所述历史刷新频率。
  14. 根据权利要求13所述的装置，其中，所述获取单元，用于：
    在检测到所述Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔小于间隔阈值的情况下，更新计数器的计数值，所述计数器用于记录各帧图像显示过程中DDIC输出的所述Multiple-TE信号的个数；
    在检测到所述Multiple-TE信号，且与前向相邻Multiple-TE信号之间的时间间隔大于所述间隔阈值的情况下，将所述计数器的所述计数值确定为所述历史个数，并将所述计数器的所述计数值置为1。
  15. 根据权利要求13所述的装置，其中，所述确定单元，用于：
    基于所述历史个数，从TE信号个数与刷新频率之间的对应关系中确定所述历史刷新频率。
  16. 根据权利要求13所述的装置，其中，所述DDIC输出Multiple-TE信号的频率为TE频率，所述TE频率与显示屏的发光EM频率相同，或，所述EM频率为所述TE频率的整数倍。
  17. 根据权利要求12至16任一所述的装置，其中，所述延迟模块，用于：
    在存在至少一帧图像对应的所述历史刷新频率小于目标刷新频率的情况下，确定满足所述送显延迟条件，并对所述第m+1帧图像数据进行所述送显延迟操作，所述目标刷新频率与前台应用运行过程中的基准帧率相匹配。
  18. 根据权利要求17所述的装置，其中，所述AP用于基于Multiple-TE信号的上升沿进行图像数据传输，所述Multiple-TE信号由所述DDIC输出；
    所述延迟模块，包括：
    第一延迟单元，用于在所述第m+1帧图像数据准备完成的情况下，确定第m帧图像显示过程中所述Multiple-TE信号的实时持续个数；在所述实时持续个数小于个数阈值的情况下，进行TE信号跳过操作，所述个数阈值基于所述目标刷新频率设置。
  19. 根据权利要求18所述的装置，其中，所述第一延迟单元，用于：
    在所述实时持续个数小于所述个数阈值的情况下，基于所述个数阈值与所述实时持续个数之差，确定Multiple-TE信号的目标跳过数量；
    在接收到所述DDIC输出的所述Multiple-TE信号，且实时跳过数量未达到所述目标跳过数量的情况下，对所述Multiple-TE信号进行跳过处理；
    更新所述实时跳过数量。
  20. 根据权利要求17所述的装置，其中，所述AP与所述DDIC之间通过移动产业处理器接口MIPI进行数据传输；
    所述装置还包括：
    定时模块，用于启动第一定时器，其中，所述第一定时器的定时器时长内所述MIPI处于通路状态；
    所述延迟模块，包括：
    第二延迟单元，用于在达到所述第一定时器的定时器时长的情况下，启动第二定时器，并在所述第二定时器的定时器时长内将所述MIPI设置为阻隔状态；
    其中，所述第一定时器和所述第二定时器的定时器时长基于所述目标刷新频率设置。
  21. 根据权利要求20所述的装置，其中，所述目标刷新频率为i，所述前台应用运行过程中所述DDIC所需的最高刷新频率为j，j大于i；
    所以第一定时器和所述第二定时器的定时器时长小于1/j；
    所述第一定时器的定时器时长与所述第二定时器的定时器时长之和大于1/j且小于1/i。
  22. 根据权利要求17所述的装置，所述装置还包括：
    第二确定模块，用于确定所述前台应用的所述基准帧率；
    设置模块，用于基于所述基准帧率设置所述送显延迟条件。
  23. 一种终端，所述终端包括应用处理器AP、显示屏和显示驱动电路芯片DDIC，所述AP与所述DDIC之间通过移动产业处理器接口MIPI相连，所述AP用于执行存储器中的至少一段程序以实现如权利要求1至11任一所述的图像数据传输方法。
  24. 一种计算机可读存储介质，所述计算机可读存储介质存储有至少一段程序，所述至少一段程序用于被处理器执行以实现如权利要求1至11任一所述的图像数据传输方法。
  25. 一种计算机程序产品，所述计算机程序产品包括计算机指令，所述计算机指令存储在计算机可读存储介质中；计算机设备的处理器从计算机可读存储介质读取该计算机指令，处理器执行该计算机指令，使得所述计算机设备执行以实现如权利要求1至11任一所述的图像数据传输方法。
PCT/CN2022/114024 2021-09-15 2022-08-22 图像数据传输方法、装置、终端及介质 WO2023040592A1 (zh)

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