WO2016091082A1 - 多屏拼接显示处理方法和设备 - Google Patents

多屏拼接显示处理方法和设备 Download PDF

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Publication number
WO2016091082A1
WO2016091082A1 PCT/CN2015/095697 CN2015095697W WO2016091082A1 WO 2016091082 A1 WO2016091082 A1 WO 2016091082A1 CN 2015095697 W CN2015095697 W CN 2015095697W WO 2016091082 A1 WO2016091082 A1 WO 2016091082A1
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WIPO (PCT)
Prior art keywords
display
display screen
virtual
screen
data
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PCT/CN2015/095697
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English (en)
French (fr)
Inventor
陈磊
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP15866764.2A priority Critical patent/EP3211523A4/en
Publication of WO2016091082A1 publication Critical patent/WO2016091082A1/zh
Priority to US15/618,754 priority patent/US10403237B2/en

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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
    • 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
    • G09G5/14—Display of multiple viewports
    • 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
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • 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
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
    • 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
    • G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0232—Special driving of display border areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0464—Positioning
    • G09G2340/0485—Centering horizontally or vertically
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/18—Use of a frame buffer in a display terminal, inclusive of the display panel
    • 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
    • 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
    • G09G5/399—Control of the bit-mapped memory using two or more bit-mapped memories, the operations of which are switched in time, e.g. ping-pong buffers

Definitions

  • the present invention relates to display processing technologies, and in particular, to a multi-screen splicing display processing method and apparatus.
  • Supporting multi-display folding and splicing is a development direction of future display devices, such as a dual-screen folding mobile phone, and a folding splicing mode of three or more screens.
  • two or more display screens are used as completely independent devices, and the application directly selects one or more designated display screens for display processing.
  • Nippon Electric Company Limited Nippon Electric Company Limited (NEC) designed a mobile phone called Medias.
  • NEC Nippon Electric Company Limited
  • the design is double-screen folding and splicing, the actual display processing treats the two displays as independent of each other. The two displays are processed separately.
  • FIG. 1 is a schematic diagram of a conventional multi-screen display processing process.
  • the application must complete multi-screen display, the application itself must support multi-screen display, that is, the application can directly call two or more display interfaces, and directly complete the image on it. Draw and output. Even if the application can directly call two or more display interfaces, the final display result is that each display separately displays the application, that is, display A and display B finally display the same image.
  • the invention provides a multi-screen splicing display processing method and device, aiming at solving the existing display Processing technology cannot achieve the problem of multi-screen splicing display of images on an application on a multi-screen display device.
  • a multi-screen splicing display processing method including:
  • Receiving multi-screen splicing display indication information where the indication information is used to indicate that at least two physical display screens are spliced and displayed;
  • the method further includes:
  • the video memory of the virtual display screen includes a buffer area; and the sending the display data to the video memory of the virtual display screen, specifically, according to the frame order in the display data, The display data is sequentially sent to the buffer area.
  • the buffer area includes: at least two cache units, the at least two cache units are the same size; and the display data is sequentially sent to the buffer area, specifically
  • the method includes: transmitting, according to a frame sequence in the display data, display data corresponding to each frame in the display data to the at least two cache units.
  • the sending the divided data blocks to the video memory of the corresponding physical display screen separately includes: synchronizing any one of the at least two physical display screens Determining, as a frame synchronization signal of the virtual display screen, transmitting, according to a frame synchronization signal of the virtual display screen, each display data of the at least two buffer units to a video memory of a corresponding physical display screen.
  • the at least two physical displays are Determining, by the frame synchronization signal of the virtual display screen, a frame synchronization signal of the virtual display screen, the frame synchronization signal of the at least two physical display screens being determined as a frame synchronization signal of the virtual display screen And transmitting, according to the frame synchronization signal of the virtual display screen, each display data of the at least two buffer units to a video memory of a corresponding physical display screen.
  • the method further includes: acquiring the first virtual display screen according to the parameter information of the virtual display screen
  • the size is the first resolution
  • the memory of the first virtual display is the first memory
  • the size of the first memory corresponds to the first resolution
  • the first resolution is smaller than the virtual display
  • the method further includes: outside the central area of the virtual display screen The preset background display data is added to the corresponding video memory of the area.
  • a multi-screen splicing display processing device including a processor, the processor comprising:
  • a receiving module configured to receive the multi-screen splicing display indication information, where the indication information is used to indicate that at least two physical display screens are spliced and displayed, and the indication information is sent to the processing module;
  • a processing module configured to send the display data to the video memory of the virtual display screen formed by the splicing of the at least two physical display screens according to the indication information, the memory size of the virtual display screen and the size of the virtual display screen Corresponding;
  • the processing module is further configured to divide the display data into at least two data blocks corresponding to sizes of the at least two physical display screens, and send the divided data blocks to corresponding physical display screens respectively.
  • the video memory In the video memory;
  • a display module configured to output data blocks received in the video memory of the at least two physical display screens to display hardware corresponding to the at least two physical display screens for display.
  • the receiving module is further configured to: send, according to the indication information, the display data to the virtual form formed by the splicing of the at least two physical display screens.
  • the display memory of the virtual display screen includes a buffer area
  • the processing module is configured to sequentially send the display data to the location according to a frame sequence in the display data.
  • the cache area In the cache area.
  • the buffer area includes: at least two cache units, the at least two cache units are the same size; and the processing module is specifically configured to follow the display data. a frame sequence, wherein display data corresponding to each frame in the display data is alternately sent to the at least two cache units.
  • the processing module is specifically configured to determine any one of the at least two physical display signals as a frame synchronization signal of the virtual display screen;
  • the frame synchronization signal of the virtual display screen sends each display data of the at least two buffer units to the video memory of the corresponding physical display screen.
  • the processing module is specifically configured to determine, as a frame synchronization signal of the virtual display screen, a frame synchronization signal with a faster frequency in the at least two physical display screens;
  • the frame synchronization signal of the virtual display screen respectively sends each display data of the at least two buffer units to the video memory of the corresponding physical display screen.
  • the receiving module is further configured to: after acquiring the parameter information of the virtual display screen, according to parameter information of the virtual display screen, Obtaining a size of the first virtual display screen as a first resolution, a memory of the first virtual display screen is a first video memory, and a size of the first video memory is corresponding to the first resolution, where the first resolution is smaller than
  • the processing module is configured to send the display data to the first display memory, and compile the display data in the first display memory to a central area of the virtual display screen.
  • the processing module is further configured to supplement the preset background display data to the video memory corresponding to the area other than the central area of the virtual display screen.
  • the embodiment of the present invention can change the parameter reported to the application to the virtual display parameter when the plurality of screens are spliced and displayed, and the corresponding memory address is switched to the virtual display memory address, so that the application can be displayed in multiple displays.
  • the multi-screen splicing display of the image is completed on the screen.
  • FIG. 1 is a schematic diagram of a process of a conventional multi-screen display process
  • FIG. 2 is a flowchart of an embodiment of a multi-screen splicing display processing method according to the present invention
  • FIG. 3 is a schematic diagram of a process of multi-screen splicing display processing according to the present invention.
  • FIG. 4 is a flowchart of still another embodiment of a multi-screen splicing display processing method according to the present invention.
  • FIG. 5 is a schematic diagram of an image data frame processing process
  • FIG. 6 is a schematic diagram of a process of processing an image data frame in a multi-screen splicing display processing method according to the present invention.
  • FIG. 7 is a flowchart of still another embodiment of a multi-screen splicing display processing method according to the present invention.
  • FIG. 8 is a schematic diagram of a multi-screen splicing display processing device of the present invention.
  • the multi-screen splicing display processing method provided by the embodiment of the present invention can be specifically applied to the process of performing image splicing display, and is applicable to an electronic device having multiple display screens, for example, a multi-screen folding mobile phone, a multi-screen folding computer, a folding television, Folding electronic photo albums and other equipment.
  • the processing may be performed by a data processing system in the above device, such as a CPU or the like.
  • FIG. 2 is a flowchart of an embodiment of a multi-screen splicing display processing method according to the present invention, including:
  • Step 21 Receive multi-screen splicing display indication information, where the indication information is used to indicate that at least two physical display screens are spliced and displayed;
  • Step 22 Send display data to the video memory of the virtual display screen formed by the stitching of the at least two physical display screens according to the indication information, where the memory size of the virtual display screen corresponds to the size of the virtual display screen ;
  • Step 23 dividing the display data into at least two and at least two physical display screens a data block corresponding to the size, and sending the divided data blocks to the video memory of the corresponding physical display screen;
  • Step 24 Output data blocks received in the display memory of the at least two physical display screens to display hardware corresponding to the at least two physical display screens for display.
  • the splicing display of two physical display screens is taken as an example for detailed description, and the two physical display screens are respectively labeled as the display screen A and the display screen B. It can be understood that when the electronic device has three or more display screens, the principle of image mosaic display is the same, and the processing of three or more display screens is not described in this embodiment.
  • the foregoing indication information is, for example, that the electronic device user flips or lights another display screen, or may be triggered by an operation such as a multi-screen mode selected in an application display option menu.
  • the indication information includes the number of display screens to be spliced and the size of each display screen, for example, splicing of two display screens, or splicing of three display screens, or even more. It may also include a spliced form of a plurality of display screens, such as upper and lower (longitudinal) stitching, or left and right (horizontal) stitching, and the like.
  • the virtual display screen is a display screen composed of the display screen A and the display screen B.
  • the size of the virtual display screen is two physical display screens. For example, if the two physical display screens are 1024*768, the size is 1024*768.
  • the size of the virtual display is 1536*1024. According to the size of the virtual display, the corresponding storage space can be allocated in the memory as the corresponding display memory of the virtual display.
  • FIG. 3 is a schematic diagram of a multi-screen splicing display processing process of the present invention.
  • the user of the electronic device can flip or illuminate another display screen, or by applying
  • the program displays the multi-screen mode selected in the option menu to trigger the multi-screen splicing display indication information.
  • the data processing system After receiving the indication information, the data processing system only needs to change the parameter reported to the application to the virtual display parameter, and at the same time, The corresponding memory address can be switched to the virtual display memory address.
  • the application sends the display data to the corresponding display memory of the virtual display, and the data processing system divides the corresponding display data in the virtual display memory into two, and sends them to the display A and the display B respectively.
  • the application program completes the horizontal image drawing in the corresponding display memory of the virtual display screen, and then the image drawn in the virtual display screen memory can be divided into two parts. Copy the data corresponding to the image on the left to the memory corresponding to the display A, and copy the data corresponding to the image on the right to the memory corresponding to the display B.
  • the data corresponding to the image drawn in the virtual display memory is [M N], where M, N represents two data blocks, and the data block M is copied to the display memory corresponding to the display A, and the data block N is copied to the display memory corresponding to the display B.
  • the application completes the vertical image drawing in the corresponding display memory of the virtual display screen, and then the image drawn in the virtual display screen memory can be divided into two upper and lower blocks. Copy the data corresponding to the upper image to the video memory corresponding to the display A, and copy the data corresponding to the lower image to the video memory corresponding to the display B.
  • the data processing system copies the data block M to the video memory corresponding to the display A at the same time, and copies the data block N to the video memory corresponding to the display screen B.
  • the data received by the display A is output to the display hardware corresponding to the display A for display.
  • the data received by the display B is output to the display hardware corresponding to the display B for display.
  • the foregoing step 24 can be implemented by using an existing image display solution, and the embodiment does not impose any limitation.
  • the multi-screen splicing display processing method provided by the embodiment can change the parameter reported to the application to the virtual display parameter when the multiple screens are spliced and displayed, and the corresponding memory address is switched to the memory address of the virtual display screen, thereby realizing the application.
  • the program completes the multi-screen stitching display of the image on multiple displays.
  • the display data is sent to the virtual display screen formed by the splicing of the at least two physical display screens according to the indication information.
  • the parameter information of the virtual display screen includes the size of the virtual display screen and the display information of the virtual display screen.
  • the multi-screen splicing display processing method provided in this embodiment includes:
  • Step 41 Receive multi-screen splicing display indication information, where the indication information is used to indicate that at least two physical display screens are spliced and displayed;
  • Step 42 Obtain parameter information of the virtual display screen, where the parameter information of the virtual display screen includes a size of the virtual display screen and display memory information of the virtual display screen;
  • Step 43 Send display data to the video memory of the virtual display screen formed by the stitching of the at least two physical display screens according to the indication information, where the memory size of the virtual display screen corresponds to the size of the virtual display screen. ;
  • Step 44 The display data is divided into at least two data blocks corresponding to the sizes of the at least two physical display screens, and the divided data blocks are respectively sent to the video memory of the corresponding physical display screen;
  • Step 45 Output data blocks received in the video memory of the at least two physical display screens to display hardware corresponding to the at least two physical display screens for display.
  • the user of the electronic device can trigger multi-screen splicing display indication information by flipping or lighting another display screen, or by an operation such as multi-screen mode selected in the application display option menu, data processing
  • the system allocates the corresponding storage space as the memory corresponding to the virtual display screen according to the indication information, switches the main display screen to the virtual display screen, and obtains the virtual according to the indication information and the memory of the allocated virtual display screen.
  • the parameter information of the display screen includes the size of the virtual display screen and the memory information of the virtual display screen, and then reports the parameter information of the virtual display screen to the application to be displayed, and simultaneously switches the corresponding memory address to the virtual display screen.
  • the memory address can be.
  • the application will send display data to the corresponding interface function of the main display of the current system, that is, the application will send the display data to the corresponding video memory of the virtual display through the corresponding interface function of the main display of the current system.
  • the video memory may include a buffer area, and the display data may be sequentially sent to the buffer area according to the frame order in the display data, which may play a transition role in the image data display processing process to ensure The fluency of the image display.
  • FIG. 5 is a schematic diagram of an image data frame processing process.
  • the video memory may not be a memory having the same resolution as the display screen, but may include multiple frame buffers of the same size ( Frame buffer (abbreviated as FB), for example, can be two or three, or even more.
  • FB Frame buffer
  • Each frame of the display data is then alternately transmitted to the FB in accordance with the frame order in the display data.
  • the function is to ensure that at least one FB is in the display data transmitted by the application layer, and the other has previously stored the previous frame display data, which can be transmitted to the display hardware at the same time, so as to ensure the smoothness of the image display. .
  • the frame synchronization (Vsync) signal is a synchronous hardware signal on the display hardware, indicating that the display hardware has completed one frame of data display, and the system can go to the display hardware through the hardware bus. Pass the next frame of data on.
  • the Vsync signal is the system switching FB1 and FB2, one for the input (application to input data into the memory), and the other for the output (output data to the display hardware) switching signal.
  • the memory of the virtual display screen includes: at least two cache units, that is, the FBs described above, and the at least two cache units have the same size.
  • step 43 the display data is sent to the video memory of the virtual display screen formed by the splicing of the at least two physical display screens, which may specifically include the following steps:
  • Display data corresponding to each frame in the display data is alternately transmitted to the at least two cache units according to a frame sequence in the display data.
  • FIG. 6 is a schematic diagram of a process of processing an image data frame in a multi-screen splicing display processing method according to the present invention. Please refer to FIG. 6.
  • the folding and splicing display of two physical display screens are also taken as an example for detailed description, and the two physical display screens are respectively labeled as the display screen A and the display screen B.
  • Vsync signals When the display A and the display B are required to be displayed together, there will be two Vsync signals. In order to ensure the smoothness of the image display, it is necessary to ensure that the two Vsync signals are triggered at almost the same time, which is equivalent to the Vsync signals A and Vsync.
  • Signal B is unified into a Vsync signal and acts as a Vsync signal for the virtual display.
  • the conditions to be satisfied are as follows: 1) the resolutions of the two display screens are exactly the same; 2) the self-refresh frequency of the two display settings is completely the same, and there is no frequency.
  • the data processing system determines any one of the Vsync signal A and the Vsync signal B corresponding to the display screen A and the display screen B as the Vsync signal of the virtual display screen.
  • the Vsync signal A is selected as the Vsync signal of the virtual display screen, and then the data in the current frame in the FB1 and FB2 of the virtual display screen is respectively sent to the video memory of the corresponding physical display screen according to the Vsync signal A.
  • any one of the Vsync signal A and the Vsync signal B is selected as the Vsync signal of the virtual display screen, for example, the Vsync signal A is selected as the Vsync signal of the virtual display screen, and the Vsync signal of the display screen B is sent to The corresponding FB, when the display memory of the display B completes the FB switching, triggers the movement of moving data from the FB of the virtual display memory to the display memory of the display B.
  • Vsync signal A and the Vsync signal B have the same frequency, but the timing is inconsistent, there will be no problem, because only the time displayed on the two screens differs by a few milliseconds, and the human eye is completely unrecognizable.
  • the frequency of the Vsync signal A is faster than the Vsync signal B, it will appear in the display period of a certain Vsync signal A, and the Vsync signal B is not triggered, so that there is no Move the data to display B, that is, display B will display one frame less than display A.
  • the frequency of the frame display is very fast (for example, 60 Hz per second), the next frame will be compensated for immediately, and it is difficult for the human eye to feel it. If the frequency of the Vsync signal A is slower than the Vsync signal B, a certain Vsync signal B signal is triggered, and the data moved is the data of the previous frame that has been displayed before, so that the human eye cannot feel it, so It doesn't matter.
  • the system may further determine the Vsync signal of the Vsync signal A and the Vsync signal B corresponding to the display screen A and the display screen B as the Vsync of the virtual display screen. signal. Specifically, the system may first identify the respective frequencies of the Vsync signal A and the Vsync signal B, and then select the Vsync signal as the virtual display screen with the fast frequency. Then, according to the selected Vsync signal, the data in the current frame in FB1 and FB2 of the virtual display screen are respectively sent to the video memory of the corresponding physical display screen.
  • the multi-screen splicing display processing method provided by the embodiment can change the parameter reported to the application to the virtual display parameter when the multiple screens are spliced and displayed, and the corresponding memory address is switched to the memory address of the virtual display screen, thereby realizing the application.
  • the program completes the multi-screen stitching display of the image on multiple displays. Further, by selecting the Vsync signal of one of the display screens as the Vsync signal of the virtual display screen, or the Vsync signal of the Vsync signal corresponding to each display screen as the virtual display screen, the display data is accurately output, thereby ensuring the accurate display.
  • FIG. 7 is a flowchart of still another embodiment of a multi-screen splicing display processing method according to the present invention.
  • the multi-screen splicing display processing method provided in this embodiment further describes another possible implementation manner for displaying the virtual display screen in the above embodiment on the basis of the embodiments shown in FIG. 2 and FIG. How to make the display better when the ratio does not meet the standard display scale of the application.
  • the multi-screen splicing display processing method provided in this embodiment includes:
  • Step 71 Receive multi-screen splicing display indication information, where the indication information is used to indicate that at least two physical display screens are spliced and displayed;
  • Step 72 Obtain parameter information of the virtual display screen, where the parameter information of the virtual display screen includes a size of the virtual display screen and display memory information of the virtual display screen;
  • Step 73 Acquire, according to the parameter information of the virtual display screen, a size of the first virtual display screen as a first resolution, a memory of the first virtual display screen is a first display memory, and a size of the first display memory and the first Corresponding to a resolution, the first virtual display screen is smaller than the virtual display screen;
  • Step 74 Send the display data to the first display memory according to the indication information.
  • Step 75 Compile display data in the first video memory to a central area of the virtual display screen
  • Step 76 The display data is divided into at least two data blocks corresponding to the sizes of the at least two physical display screens, and the divided data blocks are respectively sent to the video memory of the corresponding physical display screen;
  • Step 77 Output data blocks received in the video memory of the at least two physical display screens to display hardware corresponding to the at least two physical display screens for display.
  • the display ratio after splicing multiple physical displays may not meet the standard display ratio of the application, which may result in poor display performance.
  • the size of two physical displays is 1024*768, and the size of the virtual display is 1536*1024, but this is not a standard display ratio. If it is directly reported to the application, most applications may not This display specification is supported so that it cannot be displayed, or it needs to be zoomed to display, which may result in an unsatisfactory display.
  • the data processing system acquires the size of the virtual display screen, and according to the size of the virtual display screen, selects the first virtual display screen that is closest to the virtual display screen and is used for transition.
  • Display wherein the resolution of the first virtual display is a standard display scale.
  • the system may allocate a corresponding storage space as the first video memory to the first virtual display screen according to the resolution of the first virtual display screen.
  • the actual size of the virtual display screen acquired by the system is 1536*1024, and the closest and smaller standard size resolution is WXGA+ (1440*900). In this case, another 1440*900 can be opened.
  • the memory area is reported to the application by the standard size resolution and its corresponding memory information, and the application draws the image in the corresponding video memory of 1440*900. After the drawing is completed, the data is compiled into the virtual display (1536*1024). Central area.
  • an area other than the central area of the virtual display screen may be set as a preset background.
  • the area outside the central area of the virtual display screen can be set to black or other user-friendly color, or the area outside the center area of the virtual display screen can be set as the eye color, or can be set as the user favorite frame or Other backgrounds, etc.
  • the preset background display data may be added to the video memory corresponding to the area other than the central area of the virtual display screen.
  • the following is an example of setting the area outside the center of the virtual display to black as an example. Bright.
  • the display data of the application in the virtual display is:
  • the display data in the virtual display memory after filling can be expressed as:
  • the display data in the virtual display memory is divided into two, and then the data on the left side is copied to the corresponding display memory of the display A, and the right side is The data is copied to the video memory corresponding to the display B.
  • the multi-screen splicing display processing method provided by the embodiment can change the parameter reported to the application to the virtual display parameter when the multiple screens are spliced and displayed, and the corresponding memory address is switched to the memory address of the virtual display screen, thereby realizing the application.
  • the program completes the multi-screen stitching display of the image on multiple displays. Further, the transition display is performed by the additionally applied first virtual display screen having the standard display scale, so that the display effect of the application is more ideal.
  • FIG. 8 is a schematic diagram of a multi-screen splicing display processing device of the present invention.
  • the multi-screen splicing display processing device provided in this embodiment can implement various steps of the multi-screen splicing display processing method provided by the embodiment shown in FIG. 2 , FIG. 4 and FIG. 7 , and details are not described herein again. .
  • the multi-screen splicing display processing device includes a multi-screen splicing display processor, and the processor specifically includes a receiving module 81, a processing module 82, and a display module 83.
  • the receiving module 81 is configured to receive the multi-screen splicing display indication information, where the indication information is used to indicate that at least two physical display screens are spliced and displayed, and the indication information is sent to the processing module.
  • the processing module 82 is configured to send display data to the at least two objects according to the indication information.
  • the memory size of the virtual display screen corresponds to the size of the virtual display screen.
  • the processing module is further configured to divide the display data in the video memory of the virtual display screen into at least two data blocks corresponding to the sizes of the at least two physical display screens, and send the divided data blocks to the Corresponding physical display in the video memory.
  • the display module 83 is configured to output data blocks received in the display memory of the at least two physical display screens to display hardware corresponding to the at least two physical display screens for display.
  • the receiving module 81 is further configured to: before sending the display data to the video memory of the virtual display screen formed by the splicing of the at least two physical display screens according to the indication information, acquiring the virtual display screen Parameter information, the parameter information of the virtual display screen includes a size of the virtual display screen and display information of the virtual display screen.
  • the video memory may include a buffer area
  • the processing module 82 may be specifically configured to sequentially send the display data to the buffer area according to the frame sequence in the display data.
  • the foregoing buffer may include: at least two cache units, and the at least two cache units are the same size.
  • the processing module 82 is specifically configured to alternately send display data corresponding to each frame in the display data to at least two cache units according to a frame sequence in the display data.
  • the processing module 82 is further configured to determine any one of the at least two physical display signals as a frame synchronization signal of the virtual display screen; and according to the frame synchronization signal of the virtual display screen. Sending each display data of the at least two cache units to a video memory of a corresponding physical display screen.
  • the processing module 82 is further configured to determine, as a frame synchronization signal of the virtual display screen, a frame synchronization signal that is faster in the at least two physical display screens;
  • the frame synchronization signal of the display screen sends the respective display data of the at least two buffer units to the video memory of the corresponding physical display screen.
  • the receiving module 81 is further configured to acquire, according to the parameter information of the virtual display screen, a size of the first virtual display screen as a first resolution, and the first virtual display screen
  • the video memory is a first video memory, and the size of the first video memory corresponds to the first resolution, and the first resolution is smaller than the virtual display screen.
  • the processing module 82 is specifically configured to send the display data to the first display memory, and compile image data in the first display memory to a central area of the virtual display screen.
  • the processing module 82 is further configured to set an area other than a central area of the virtual display screen as a preset background.
  • the processing module 82 is further configured to add preset background display data to the video memory corresponding to the area other than the central area of the virtual display screen.
  • the multi-screen splicing display processing device provided in this embodiment can realize the multi-screen splicing display of the image on the multi-display screen when the plurality of screens are spliced and displayed. Further, the display of the application can be made smoother and the display effect is more ideal.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

一种多屏拼接显示处理方法和设备，该方法包括：接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示(21)；根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应(22)；将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中(23)；将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示(24)。可以在多个屏幕拼接显示时，实现应用程序在多显示屏上完成图像的多屏拼接显示。

Description

多屏拼接显示处理方法和设备
本申请要求于2014年12月11日提交中国专利局、申请号为201410765262.7，发明名称为“多屏拼接显示处理方法和设备”的中国专利申请的优先权，在先申请文件的内容通过引用结合在本申请中。
技术领域
本发明涉及显示处理技术，尤其涉及一种多屏拼接显示处理方法和设备。
背景技术
支持多显示屏的折叠拼接，是未来显示设备的一个发展方向，例如双屏折叠手机，还可以有三屏甚至更多屏的折叠拼接模式。
目前的多屏显示方案中，均是将两个或者多个显示屏，作为完全独立的设备，应用程序直接选择指定的一个或者多个显示屏进行显示处理。例如日本电气有限公司(Nippon Electric Company Limited，简称NEC)设计的一款名为Medias的手机，虽然设计外形是双屏折叠拼接的，但实际的显示处理还是将两个显示屏当作彼此独立的两个显示屏进行单独处理。
现有技术中，显示处理过程中，将两个或者多个显示屏作为完全独立的设备，应用程序直接选择指定的一个或者多个显示屏进行显示处理。现有多屏显示处理过程可参照图1所示，图1为现有多屏显示处理过程示意图。从图1中可以看出，应用程序要完成多屏显示，就要求应用程序本身就必须支持多屏显示，即需要应用程序能直接调用两个或者多个显示接口，并直接在其上完成图像绘制和输出。即使应用程序能直接调用两个或者多个显示接口，最终的显示结果也是每个显示屏对应用程序进行单独显示，即显示屏A和显示屏B最终显示出一模一样的图像。
而当前绝大多数应用程序，都是针对单一显示屏设计的，难以在多屏显示设备上完成图像的多屏拼接显示。
发明内容
本发明提供一种多屏拼接显示处理方法和设备，目的就是解决现有显示 处理技术无法实现应用程序在多屏显示设备上完成图像的多屏拼接显示问题。
第一方面，提供一种多屏拼接显示处理方法，包括：
接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示；
根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应；
将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
结合本发明实施例第一方面的一种可能的实现方式中，所述方法还包括：
在根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中之前，获取所述虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息。
进一步地，在一种可能的实现方式中，所述虚拟显示屏的显存包括缓存区；所述将显示数据发送至虚拟显示屏的显存中，具体包括：按照所述显示数据中的帧顺序，将所述显示数据依次发送至所述缓存区中。
进一步地，在一种可能的实现方式中，所述缓存区包括：至少两个缓存单元，所述至少两个缓存单元的大小相同；所述将显示数据依次发送至所述缓存区中，具体包括：按照所述显示数据中的帧顺序，将所述显示数据中的每一帧对应的显示数据交替发送至所述至少两个缓存单元中。
进一步地，在一种可能的实现方式中，所述将所划分的数据块分别发送至对应的物理显示屏的显存中，具体包括：将所述至少两个物理显示屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
进一步地，在另一种可能的实现方式中，所述将所述至少两个物理显示 屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号，具体包括：将所述至少两个物理显示屏中频率较快的帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
结合本发明实施例第一方面的另一种可能的实现方式中，所述获取所述虚拟显示屏的参数信息之后，还包括：根据所述虚拟显示屏的参数信息，获取第一虚拟显示屏的大小为第一分辨率，第一虚拟显示屏的显存为第一显存，所述第一显存的大小与所述第一分辨率对应，所述第一分辨率小于所述虚拟显示屏；所述将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，具体包括：将所述显示数据发送至所述第一显存；将所述第一显存中的显示数据编译到所述虚拟显示屏的中心区域。
进一步地，在一种可能的实现方式中，所述将所述第一显存中的图像数据编译到所述虚拟显示屏的中心区域之后，还包括：向所述虚拟显示屏的中心区域以外的区域对应的显存中补充预设的背景显示数据。
第二方面，提供了一种多屏拼接显示处理设备，包括处理器，所述处理器包括：
接收模块，用于接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示，并将所述指示信息发送给处理模块；
处理模块，用于根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应；
所述处理模块还用于，将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
显示模块，用于将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
结合本发明实施例第二方面的另一种可能的实现方式中，所述接收模块还用于，在根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中之前，获取所述虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显 存信息。
进一步地，在一种可能的实现方式中，所述虚拟显示屏的显存包括缓存区；所述处理模块具体用于，按照所述显示数据中的帧顺序，将所述显示数据依次发送至所述缓存区中。
进一步地，在一种可能的实现方式中，所述缓存区包括：至少两个缓存单元，所述至少两个缓存单元的大小相同；所述处理模块具体用于，按照所述显示数据中的帧顺序，将所述显示数据中的每一帧对应的显示数据交替发送至所述至少两个缓存单元中。
进一步地，在一种可能的实现方式中，所述处理模块具体用于，将所述至少两个物理显示屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
进一步地，在一种可能的实现方式中，所述处理模块具体用于，将所述至少两个物理显示屏中频率较快的帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
结合本发明实施例第二方面的另一种可能的实现方式中，所述接收模块还用于，在所述获取所述虚拟显示屏的参数信息之后，根据所述虚拟显示屏的参数信息，获取第一虚拟显示屏的大小为第一分辨率，第一虚拟显示屏的显存为第一显存，所述第一显存的大小与所述第一分辨率对应，所述第一分辨率小于所述虚拟显示屏；所述处理模块具体用于将所述显示数据发送至所述第一显存，将所述第一显存中的显示数据编译到所述虚拟显示屏的中心区域。
进一步地，在一种可能的实现方式中，所述处理模块还用于向所述虚拟显示屏的中心区域以外的区域对应的显存中补充预设的背景显示数据。
基于上述技术方案，本发明实施例在多个屏幕拼接显示时，通过将上报给应用的参数变更为虚拟显示屏参数，对应的显存地址切换为虚拟显示屏显存地址，可以实现应用程序在多显示屏上完成图像的多屏拼接显示。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有多屏显示处理过程示意图；
图2为本发明多屏拼接显示处理方法一实施例的流程图；
图3为本发明多屏拼接显示处理过程示意图；
图4为本发明多屏拼接显示处理方法又一实施例的流程图；
图5为图像数据帧处理过程示意图；
图6为本发明多屏拼接显示处理方法中图像数据帧处理过程示意图；
图7为本发明多屏拼接显示处理方法再一实施例的流程图；
图8为本发明多屏拼接显示处理设备示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供的多屏拼接显示处理方法具体可以应用于进行图像拼接显示的过程，适用于具有多个显示屏的电子设备，例如：多屏折叠手机、多屏折叠电脑、折叠电视机、折叠电子相册等设备。执行该处理过程的可以是上述设备中的数据处理系统，例如：CPU等。
图2为本发明多屏拼接显示处理方法一实施例的流程图，包括：
步骤21，接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示；
步骤22，根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应；
步骤23，将所述显示数据划分为至少两个与所述至少两个物理显示屏的 大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
步骤24，将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
本实施例具体以两个物理显示屏的拼接显示为例进行详细说明，将两个物理显示屏分别标记为显示屏A和显示屏B。可以理解，当电子设备具有三个或者更多的显示屏时，图像拼接显示的原理是一样的，本实施例不再描述三个或者更多的显示屏的处理。
可选的，上述指示信息，例如是电子设备使用者翻转或点亮另一显示屏，也可以是通过应用程序显示选项菜单中选择的多屏模式等操作来触发。所述指示信息包括，需要拼接的显示屏的数量及各个显示屏的大小，例如，两个显示屏的拼接，或者三个显示屏的拼接，甚至更多。还可以包括，多个显示屏的拼接形式，例如上下(纵向)拼接，或者左右(横向)拼接等。
本实施例定义虚拟显示屏为显示屏A和显示屏B拼接构成的显示屏，此虚拟显示屏的大小为两个物理显示屏相加，例如，两个物理显示屏大小为1024*768，则虚拟显示屏的大小为1536*1024，按照虚拟显示屏的大小，可以内存中分配相应的存储空间作为虚拟显示屏对应的显存。
图3为本发明多屏拼接显示处理过程示意图。请参照图3，本实施例提供的多屏拼接显示处理方法中，在需要显示屏A和显示屏B拼接显示的时候，电子设备使用者可以通过翻转或点亮另一显示屏，或通过应用程序显示选项菜单中选择的多屏模式等操作来触发多屏拼接显示指示信息，数据处理系统接收上述指示信息后，只需要将上报给应用程序的参数变更为虚拟显示屏的参数，同时，将对应的显存地址切换为虚拟显示屏显存地址即可。
接下来，应用程序会将显示数据发送至虚拟显示屏对应的显存中，数据处理系统再将虚拟显示屏显存中对应的显示数据一分为二，分别发送给显示屏A和显示屏B对应的显存中。一方面，当所述指示信息指示两个显示屏横向拼接时，应用程序会在虚拟显示屏对应的显存内完成横向图像绘制，然后可以将虚拟显示屏显存中绘制的图像分为左右两块，将左边图像对应的数据拷贝至显示屏A对应的显存中，将右边图像对应的数据拷贝至显示屏B对应的显存中。例如虚拟显示屏显存中绘制的图像对应的数据为[M N],其中M、 N代表两个数据块，将数据块M拷贝至显示屏A对应的显存中，将数据块N拷贝至显示屏B对应的显存中。另一方面，当所述指示信息指示两个显示屏纵向拼接时，应用程序会在虚拟显示屏对应的显存内完成纵向图像绘制，然后可以将虚拟显示屏显存中绘制的图像分为上下两块，将上边图像对应的数据拷贝至显示屏A对应的显存中，将下边图像对应的数据拷贝至显示屏B对应的显存中。需要说明的是，数据处理系统会同时将数据块M拷贝至显示屏A对应的显存中，将数据块N拷贝至显示屏B对应的显存中。
最后再将显示屏A显存接收的数据输出至显示屏A对应的显示硬件中进行显示，同样，将显示屏B显存接收的数据输出至显示屏B对应的显示硬件中进行显示。一种优选的实施方式，上述步骤24可一通过现有图像显示方案实现，本实施例对此不做任何限制。
本实施例提供的多屏拼接显示处理方法，在多个屏幕拼接显示时，通过将上报给应用的参数变更为虚拟显示屏参数，对应的显存地址切换为虚拟显示屏的显存地址，可以实现应用程序在多显示屏上完成图像的多屏拼接显示。
图4为本发明多屏拼接显示处理方法又一实施例的流程图。本实施例提供的多屏拼接显示处理方法，在图2所实施示例的基础上，在根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中之前，还需获取所述虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息。
如图4所示，本实施例提供的多屏拼接显示处理方法包括：
步骤41，接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示；
步骤42，获取虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息；
步骤43，根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应；
步骤44，将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
步骤45，将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
在需要进行多屏拼接显示时，电子设备使用者可以通过翻转或点亮另一显示屏，或通过应用程序显示选项菜单中选择的多屏模式等操作来触发多屏拼接显示指示信息，数据处理系统接收上述指示信息后，根据该指示信息，分配相应的存储空间作为虚拟显示屏对应的显存，将主显示屏切换为虚拟显示屏，再根据指示信息和所分配的虚拟显示屏的显存获取虚拟显示屏的参数信息，包括虚拟显示屏的大小和所述虚拟显示屏的显存信息，然后将虚拟显示屏的参数信息上报给待显示的应用程序，同时，将对应的显存地址切换为虚拟显示屏显存地址即可。应用程序就会往当前系统的主显示屏的对应接口函数上发送显示数据，即应用程序会通过当前系统的主显示屏的对应接口函数将显示数据发送至虚拟显示屏对应的显存中。
在图像数据显示处理过程中，显存可以包括缓存区，就可以按照显示数据中的帧顺序，将显示数据依次发送至缓存区中，可以在图像数据显示处理过程中起到过渡的作用，以保证图像显示的流畅性。
图5为图像数据帧处理过程示意图，请参照图5，根据图5可以看出，显存其实可以不是一个和显示屏分辨率大小一致的内存，而是可以包括多个同样大小的帧缓冲区(frame buffer，简称FB)，例如可以是两个或三个，甚至更多个，FB的个数越多，显示越流畅。然后按照显示数据中的帧顺序，将所述显示数据中的每一帧数据交替发送至FB中。其作用是保证至少一个FB在承接应用层往下传送的显示数据的时候，另一个已经事先存放好上一帧显示数据，可以同时往显示屏硬件上传递，这样可以充分保证图像显示的流畅性。在图5所示的图像数据帧处理过程中，帧同步(Vsync)信号是显示屏硬件上的一个同步硬件信号，表示显示屏硬件已经完成一帧数据显示，系统可以通过硬件总线往显示屏硬件上传递下一帧数据了。也可以理解为，Vsync信号就是系统切换FB1和FB2，将一个用于输入(应用程序往显存内输入数据)，另一个用于输出(往显示屏硬件上输出数据)的切换信号。当显存划分为三个甚至更多个FB时，数据显示原理是相同的，对此不再赘述。
相类似的，在本实施例中，虚拟显示屏的显存包括：至少两个缓存单元，即上述的FB，所述至少两个缓存单元的大小相同。
进一步的，步骤43中，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，具体可以包括以下步骤：
按照所述显示数据中的帧顺序，将所述显示数据中的每一帧对应的显示数据交替发送至所述至少两个缓存单元中。
图6为本发明多屏拼接显示处理方法中图像数据帧处理过程示意图，请参照图6。本实施例同样以两个物理显示屏的折叠拼接显示为例进行详细说明，将两个物理显示屏分别标记为显示屏A和显示屏B。
当需要显示屏A和显示屏B拼接显示时，就会有两个Vsync信号，为了保证图像显示的流畅性，必须保证两个Vsync信号几乎是同一时间触发，这样就相当于Vsync信号A和Vsync信号B统一成为一个Vsync信号，并作为虚拟显示屏的Vsync信号。然而要保证Vsync信号A和Vsync信号B同一时间触发，需要满足的条件是：1)两个显示屏分辨率大小完全一致；2)两个显示屏设置的自刷新频率完全一致，且不存在频率偏移的问题；3)两个显示屏同时启动并完成初始化操作。上述条件尽管可以满足，但给电子设备的设计增加了诸多限制。而且在显示屏A显示，显示屏B睡眠，翻转显示屏B后，点亮显示屏B这样的场景下，由于显示屏A和显示屏B不是一起启动并完成初始化操作的，则无法做到Vsync信号的同步，即无法满足上述条件。
作为本实施例一种可选的实施方式，数据处理系统将显示屏A和显示屏B对应的Vsync信号A和Vsync信号B中任意一个确定为所述虚拟显示屏的Vsync信号。例如选定Vsync信号A作为虚拟显示屏的Vsync信号，然后，根据Vsync信号A将虚拟显示屏的FB1和FB2中的当前帧中的数据分别发送至对应的物理显示屏的显存中。
需要说明的是，选择Vsync信号A和Vsync信号B中任意一个作为所述虚拟显示屏的Vsync信号，例如选定Vsync信号A作为虚拟显示屏的Vsync信号，则当显示屏B的Vsync信号发给对应的FB，让显示屏B的显存完成FB切换的时候，则会触发从虚拟显示屏显存的FB中搬移数据到显示屏B显存的动作。如果Vsync信号A和Vsync信号B频率一致，只是时机不一致，则不会有问题，因为只是两个屏幕上图像显示的时间相差几毫秒而已，人眼完全无法识别。但是，如果Vsync信号A的频率快于Vsync信号B，则会出现在某个Vsync信号A的显示周期中，Vsync信号B没有被触发，从而没有 搬移数据到显示屏B，即显示屏B会比显示屏A少显示一帧数据。然而，由于帧显示的频率很快(例如每秒60Hz)，马上下一帧就弥补回来了，人眼很难感受出来。如果Vsync信号A的频率慢于Vsync信号B，则会出现某次Vsync信号B信号触发后，搬移的数据是其之前已经显示过的上一帧的数据，这样人眼也是无法感受出来的，因此也没有关系。
进一步的，作为本实施例一种优选的实施方式，系统还可以将显示屏A和显示屏B对应的Vsync信号A和Vsync信号B中频率较快的Vsync信号确定为所述虚拟显示屏的Vsync信号。具体的，系统可以先识别出Vsync信号A和Vsync信号B各自的频率，然后选择其中频率快的作为虚拟显示屏的Vsync信号。然后，再根据选定的Vsync信号将虚拟显示屏的FB1和FB2中的当前帧中的数据分别发送至对应的物理显示屏的显存中。
本实施例提供的多屏拼接显示处理方法，在多个屏幕拼接显示时，通过将上报给应用的参数变更为虚拟显示屏参数，对应的显存地址切换为虚拟显示屏的显存地址，可以实现应用程序在多显示屏上完成图像的多屏拼接显示。进一步的，通过选定其中一个显示屏的Vsync信号作为虚拟显示屏的Vsync信号，或者各显示屏对应的Vsync信号中频率快的作为虚拟显示屏的Vsync信号，使显示数据准确输出，从而保证了多屏拼接图像显示的流畅性。
图7为本发明多屏拼接显示处理方法再一实施例的流程图。本实施例提供的多屏拼接显示处理方法，在图2和图4所示实施例的基础上，进一步描述了另一种可能的实现方式，用于当上述实施例中的虚拟显示屏的显示比例，不满足应用程序的标准显示比例时，如何使得显示效果更佳。
如图7所示，本实施例提供的多屏拼接显示处理方法，包括：
步骤71：接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示；
步骤72，获取虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息；
步骤73，根据所述虚拟显示屏的参数信息，获取第一虚拟显示屏的大小为第一分辨率，第一虚拟显示屏的显存为第一显存，所述第一显存的大小与所述第一分辨率对应，所述第一虚拟显示屏小于所述虚拟显示屏；
步骤74，根据所述指示信息，将所述显示数据发送至所述第一显存；
步骤75，将所述第一显存中的显示数据编译到所述虚拟显示屏的中心区域；
步骤76，将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
步骤77，将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
在实际应用中，多个物理显示屏拼接以后的显示比例，可能不满足应用程序的标准显示比例，可能造成显示效果不佳。例如，两个物理显示屏的大小为1024*768，拼接起来的虚拟显示屏大小为1536*1024，但这不是一个标准显示屏比例，如果直接上报给应用程序，则可能大部分应用程序并不支持此种显示规格从而无法显示，或需要通过缩放才能显示，这可能造成显示效果不理想。
为了使显示效果更加理想，作为一种较佳的实施方式，数据处理系统获取虚拟显示屏的大小，根据虚拟显示屏的大小，选择最近接且小于虚拟显示屏的第一虚拟显示屏用于过渡显示，其中第一虚拟显示屏的分辨率为标准显示比例。系统可以根据第一虚拟显示屏的分辨率为第一虚拟显示屏分配相应的存储空间作为第一显存。举例来说，例如系统获取的虚拟显示屏的实际大小是1536*1024，最接近且小于其的标准尺寸分辨率是WXGA+(1440*900)，在这种情况下，可以另开辟一个1440*900的显存区，将标准尺寸分辨率及其对应的显存信息上报给应用程序，应用程序在1440*900对应的显存中进行图像绘制，绘制完成后，将数据编译到虚拟显示屏(1536*1024)的中心区域。
进一步的，由于应用程序显示比例小于虚拟显示屏的显示比例，作为一种较佳的实施方式，还可以将所述虚拟显示屏的中心区域以外的区域设置为预先设置好的背景。例如，可以将虚拟显示屏的中心区域以外的区域设置为黑色或其他的用户所喜爱的颜色，也可以将虚拟显示屏的中心区域以外的区域设置为护眼色，还可以设置为用户喜爱边框或其他背景等。
具体的，可以向虚拟显示屏的中心区域以外的区域对应的显存中补充预设的背景显示数据。
下面以将虚拟显示屏的中心区域以外的区域设置为黑色为例进行详细说 明。虚拟显示屏的中的应用程序的显示数据为：
[M N]
那么，就需要向虚拟显示屏的中心区域以外的区域对应的显存中补充黑色对应的显示数据，假设黑色对应的显示数据为B，即将虚拟显示屏的中心区域以外的区域对应的显存中补充显示数据B。填充以后的虚拟显示屏显存中的显示数据可以表示为：
Figure PCTCN2015095697-appb-000001
接下来，当显示屏A和显示屏B横向拼接显示时，将虚拟显示屏显存中的显示数据一分为二，然后将左侧的数据拷贝至显示屏A对应的显存中，将右侧的数据拷贝至显示屏B对应的显存中。
可以理解，当显示屏A和显示屏B纵向拼接显示时，或者将虚拟显示屏的中心区域以外的区域设置为其他的背景，其原理是一样的，本实施例对此不再赘述。
本实施例提供的多屏拼接显示处理方法，在多个屏幕拼接显示时，通过将上报给应用的参数变更为虚拟显示屏参数，对应的显存地址切换为虚拟显示屏的显存地址，可以实现应用程序在多显示屏上完成图像的多屏拼接显示。进一步的，通过另外申请的具有标准显示比例的第一虚拟显示屏进行过渡显示，使得应用程序的显示效果更加理想。
图8为本发明多屏拼接显示处理设备示意图。如图8所示，本实施例提供的多屏拼接显示处理设备可以实现本发明图2、图4和图7所示实施例提供的多屏拼接显示处理方法的各个步骤，此处不再赘述。
本实施例提供的多屏拼接显示处理设备包括多屏拼接显示处理器，该处理器具体包括，接收模块81、处理模块82和显示模块83。
接收模块81用于接收多屏拼接显示指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示，并将所述指示信息发送给处理模块。
处理模块82用于根据所述指示信息，将显示数据发送至所述至少两个物 理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应。处理模块还用于，将所述虚拟显示屏的显存中的显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中。
显示模块83用于将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
在实际应用中，接收模块81还用于，在根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中之前，获取所述虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息。
在实际应用中，显存可以包括缓存区，处理模块82具体可以用于，按照显示数据中的帧顺序，将显示数据依次发送至缓存区中。
进一步的，在实际应用中，上述的缓冲区可以包括：至少两个缓存单元，所述至少两个缓存单元的大小相同。处理模块82具体用于按照显示数据中的帧顺序，将显示数据中的每一帧对应的显示数据交替发送至至少两个缓存单元中。
在实际应用中，处理模块82具体还用于，将所述至少两个物理显示屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
可选的，在实际应用中，处理模块82具体还用于，将所述至少两个物理显示屏中频率较快的帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
作为一种较佳的实施方式，在实际应用中，接收模块81还用于，根据所述虚拟显示屏的参数信息，获取第一虚拟显示屏的大小为第一分辨率，第一虚拟显示屏的显存为第一显存，所述第一显存的大小与所述第一分辨率对应，所述第一分辨率小于所述虚拟显示屏。所述处理模块82具体用于将所述显示数据发送至所述第一显存，将所述第一显存中的图像数据编译到所述虚拟显示屏的中心区域
进一步的，在实际应用中，处理模块82还用于将所述虚拟显示屏的中心区域以外的区域设置为预设的背景。
进一步的，在实际应用中，处理模块82具体还用于向所述虚拟显示屏的中心区域以外的区域对应的显存中补充预设的背景显示数据。
本实施例提供的多屏拼接显示处理设备，在多个屏幕拼接显示时，可以实现应用程序在多显示屏上完成图像的多屏拼接显示。进一步的，还可以使应用程序的显示更加流畅，显示效果更加理想。
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (16)

  1. 一种多屏拼接显示处理方法，其特征在于，包括：
    接收多屏拼接显示的指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示；
    根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应；
    将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
    将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中之前，还包括：
    获取所述虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述虚拟显示屏的显存包括缓存区；
    所述将显示数据发送至虚拟显示屏的显存中，具体包括：
    按照所述显示数据中的帧顺序，将所述显示数据依次发送至所述缓存区中。
  4. 根据权利要求3所述的方法，其特征在于，所述缓存区包括：至少两个缓存单元，所述至少两个缓存单元的大小相同；
    所述将显示数据依次发送至所述缓存区中，具体包括：
    按照所述显示数据中的帧顺序，将所述显示数据中的每一帧对应的显示数据交替发送至所述至少两个缓存单元中。
  5. 根据权利要求4所述的方法，其特征在于，所述将所划分的数据块分别发送至对应的物理显示屏的显存中，具体包括：
    将所述至少两个物理显示屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号；
    根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示 数据分别发送至对应的物理显示屏的显存中。
  6. 根据权利要求5所述的方法，其特征在于，所述将所述至少两个物理显示屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号，具体包括：
    将所述至少两个物理显示屏中频率较快的帧同步信号确定为所述虚拟显示屏的帧同步信号。
  7. 根据权利要求2所述的方法，其特征在于，所述获取所述虚拟显示屏的参数信息之后，还包括：
    根据所述虚拟显示屏的参数信息，获取第一虚拟显示屏的大小为第一分辨率，第一虚拟显示屏的显存为第一显存，所述第一显存的大小与所述第一分辨率对应，所述第一分辨率小于所述虚拟显示屏；
    所述将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，具体包括：
    将所述显示数据发送至所述第一显存；
    将所述第一显存中的显示数据编译到所述虚拟显示屏的中心区域。
  8. 根据权利要求7所述的方法，其特征在于，所述将所述第一显存中的图像数据编译到所述虚拟显示屏的中心区域之后，还包括：
    向所述虚拟显示屏的中心区域以外的区域对应的显存中补充预设的背景显示数据。
  9. 一种多屏拼接显示处理设备，其特征在于，包括处理器，所述处理器包括：
    接收模块，用于接收多屏拼接显示的指示信息，所述指示信息用于指示至少两个物理显示屏拼接显示，并将所述处理指示信息发送给处理模块；
    处理模块，用于根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中，所述虚拟显示屏的显存大小与所述虚拟显示屏的大小相对应；
    所述处理模块还用于，将所述显示数据划分为至少两个与所述至少两个物理显示屏的大小相对应的数据块，并将所划分的数据块分别发送至对应的物理显示屏的显存中；
    显示模块，用于将所述至少两个物理显示屏的显存中接收的数据块输出至所述至少两个物理显示屏对应的显示硬件中进行显示。
  10. 根据权利要求9所述的设备，其特征在于，所述接收模块还用于，在根据所述指示信息，将显示数据发送至所述至少两个物理显示屏拼接形成的虚拟显示屏的显存中之前，获取所述虚拟显示屏的参数信息，所述虚拟显示屏的参数信息包括所述虚拟显示屏的大小和所述虚拟显示屏的显存信息。
  11. 根据权利要求9或10所述的设备，其特征在于，所述虚拟显示屏的显存包括缓存区；
    所述处理模块具体用于，按照所述显示数据中的帧顺序，将所述显示数据依次发送至所述缓存区中。
  12. 根据权利要求11所述的设备，其特征在于，所述缓冲区包括：至少两个缓存单元，所述至少两个缓存单元的大小相同；
    所述处理模块具体用于，按照所述显示数据中的帧顺序，将所述显示数据中的每一帧对应的显示数据交替发送至所述至少两个缓存单元中。
  13. 根据权利要求12所述的设备，其特征在于，所述处理模块具体用于，将所述至少两个物理显示屏中任意一个帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
  14. 根据权利要求13所述的设备，其特征在于，所述处理模块具体用于，将所述至少两个物理显示屏中频率较快的帧同步信号确定为所述虚拟显示屏的帧同步信号；根据所述虚拟显示屏的帧同步信号将所述至少两个缓存单元中的各个显示数据分别发送至对应的物理显示屏的显存中。
  15. 根据权利要求10所述的设备，其特征在于，所述接收模块还用于，在所述获取所述虚拟显示屏的参数信息之后，根据所述虚拟显示屏的参数信息，获取第一虚拟显示屏的大小为第一分辨率，第一虚拟显示屏的显存为第一显存，所述第一显存的大小与所述第一分辨率对应，所述第一分辨率小于所述虚拟显示屏；
    所述处理模块具体用于将所述显示数据发送至所述第一显存，将所述第一显存中的显示数据编译到所述虚拟显示屏的中心区域。
  16. 根据权利要求15所述的设备，其特征在于，所述处理模块还用于向所述虚拟显示屏的中心区域以外的区域对应的显存中补充预设的背景显示数据。
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CN111179810B (zh) * 2020-02-18 2023-07-14 中车青岛四方车辆研究所有限公司 显示屏、显示屏控制系统、显示控制方法及列车显示系统
CN113014867A (zh) * 2021-02-08 2021-06-22 上海核工程研究设计院有限公司 一种像素级视频组态的方法
CN113014867B (zh) * 2021-02-08 2024-03-26 上海核工程研究设计院股份有限公司 一种像素级视频组态的方法

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