WO2024059967A1 - 交互系统、板卡、书写轨迹显示方法、平板和存储介质 - Google Patents

交互系统、板卡、书写轨迹显示方法、平板和存储介质 Download PDF

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Publication number
WO2024059967A1
WO2024059967A1 PCT/CN2022/119601 CN2022119601W WO2024059967A1 WO 2024059967 A1 WO2024059967 A1 WO 2024059967A1 CN 2022119601 W CN2022119601 W CN 2022119601W WO 2024059967 A1 WO2024059967 A1 WO 2024059967A1
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WIPO (PCT)
Prior art keywords
screen
writing
display
pixel
current touch
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PCT/CN2022/119601
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English (en)
French (fr)
Inventor
谭凯
崔剑
张悦
Original Assignee
广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Application filed by 广州视源电子科技股份有限公司, 广州视睿电子科技有限公司 filed Critical 广州视源电子科技股份有限公司
Priority to PCT/CN2022/119601 priority Critical patent/WO2024059967A1/zh
Priority to CN202280006786.0A priority patent/CN118057961A/zh
Publication of WO2024059967A1 publication Critical patent/WO2024059967A1/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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures

Definitions

  • the present application relates to the technical field of touch device image processing, and in particular to an interactive system, a board, a writing track display method, a tablet and a storage medium.
  • the existing interactive system includes a signal driving motherboard 10, a screen driving board 20, a touch screen 30, a main chip module 40 and a display screen 50.
  • the main chip module 40 outputs a screen image signal to the signal driving motherboard. 10.
  • the signal driving motherboard 10 processes the image signal and outputs it to the screen driving board 20.
  • the screen driving board 20 converts the image signal into a screen display signal to drive the display screen 50 to display the screen image.
  • the writing trace generated by the user's writing operation on the touch screen 30 is superimposed on the screen image in the main chip module 40 , so that the screen image and the writing trace are simultaneously displayed on the display screen 50 .
  • the writing track generated by the touch screen 30 needs to pass through the main chip module 40, the signal driving motherboard 10, the screen driving board 20 and other modules and the connection interfaces between the modules, resulting in the touch screen 30 After the writing operation is performed on the screen, the writing track needs to be delayed for a long time before being displayed on the display screen 50 .
  • This application provides an interactive system, a board, a writing track display method, a tablet and a storage medium to solve the problem of long writing track display delay in the interactive system.
  • this application provides an interactive system, including a signal driving motherboard, a screen driving board, a touch screen and a main chip module.
  • the main chip module is respectively connected to the signal driving main board and the touch screen.
  • the screen driving board is connected to the touch screen and the signal driving main board respectively;
  • the touch screen is used to generate the current touch coordinates of the current writing position
  • the main chip module is used to generate a screen image and send it to the signal driving main board when receiving the current touch coordinates from the touch screen;
  • the screen driver board is used for:
  • the present application provides a board, including a signal driving mainboard, a screen driving board and a main chip module, wherein the signal driving mainboard is connected to the screen driving board and the main chip module respectively;
  • the main chip module is used to receive the current touch coordinates and generate a screen image to send to the signal driving main board, wherein the current touch coordinates are obtained from the current writing position of the touch screen connected to the board card;
  • the screen driver board is used for:
  • this application provides a writing trajectory display method, which is applied to the interactive system described in the first aspect, including:
  • the signal driving mainboard receives a first screen image, wherein the first screen image is an image including a historical writing track generated by the main chip module;
  • this application provides a writing track display method, which is applied to the board described in the second aspect, including:
  • this application provides a display module, including a display screen and a screen driving board.
  • the display screen is connected to the screen driving board.
  • the screen driving board is used for:
  • the current touch coordinates are obtained from the current writing position of the touch screen connected to the display module;
  • the first screen image being an image containing a historical writing track received by a signal driven motherboard connected to the display module;
  • the present application provides an intelligent interactive tablet, including a display screen, a screen drive board and a touch screen.
  • the screen drive board is connected to the display screen and the touch screen respectively;
  • the screen driver board is used for:
  • the first screen image being an image containing a historical writing track received by a signal driven motherboard connected to the intelligent interactive tablet;
  • this application provides an intelligent interactive tablet, which includes:
  • the memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor, so that the at least one processor can perform the writing described in the second aspect of the application. Trajectory display method.
  • the present application provides a computer-readable storage medium that stores computer instructions, and the computer instructions are used to enable the processor to implement the writing trajectory described in the second aspect of the application when executed. Display method.
  • the screen driving board can receive the current touch coordinates of the current writing position from the touch screen, and receive the first screen image from the signal driving main board.
  • the first screen image is received by the signal driving main board.
  • the screen driver board determines the writing color of the current touch coordinates from the color of the pixels contained in the historical writing track, drives the display screen to display the first screen image, and drives the display screen to display the first screen image in the first screen image.
  • the pixel corresponding to the current touch coordinate displays the writing color to display the writing track of the current touch coordinate.
  • the screen driver board can directly receive the touch coordinates of the current writing position, directly determine the writing color of the touch coordinates in the first screen image containing the historical writing track, and drive the display screen to correspond to the touch coordinates in the first screen image.
  • the pixels display the writing color to display the writing track, which solves the problem of delay in the display of the writing track caused by the main chip module synthesizing the trajectory of the screen image and the touch coordinates and then sequentially driving the main board and the screen driver board to the display through signals. , shortening the writing track display delay and achieving synchronization of writing operations and display.
  • FIG1 is a schematic diagram of a topological structure of an interactive system in the prior art
  • Figure 2A is a schematic diagram of the topology of an interactive system according to Embodiment 1 of the present application.
  • Figure 2B is a schematic diagram of a screen image in this embodiment
  • Figure 2C is a schematic diagram of the first screen image in this embodiment.
  • Figure 2D is a schematic diagram of the second screen image in this embodiment.
  • Figure 3 is a schematic diagram of the topology structure of a board card provided in Embodiment 2 of the present application.
  • Figure 4 is a flow chart of a writing track display method provided in Embodiment 3 of the present application.
  • Figure 5 is a flow chart of a writing track display method provided in Embodiment 4 of the present application.
  • Figure 6 is a flow chart of a writing track display method provided in Embodiment 5 of the present application.
  • Figure 7 is a flow chart of a writing track display method provided in Embodiment 6 of the present application.
  • Figure 8 is a schematic diagram of the topology of a display module provided in Embodiment 7 of the present application.
  • Figure 9 is a schematic diagram of the topology of an intelligent interactive tablet provided in Embodiment 8 of the present application.
  • Figure 10 is a schematic diagram of the topology of an intelligent interactive tablet provided in Embodiment 9 of the present application.
  • FIG 2A is a schematic diagram of the topology of an interactive system provided in Embodiment 1 of the present application.
  • the interactive system in this embodiment includes a signal driving motherboard 10, a screen driving board 20, a touch screen 30, and a main chip module 40 and display screen 50.
  • the main chip module 40 is connected to the signal driving motherboard 10 and the touch screen 30 respectively, and the screen driving board 20 is connected to the touch screen 30 and the signal driving motherboard 10 respectively.
  • the touch screen 30 is used to generate the current touch coordinates of the current writing position, and the main chip module 40 is used to generate a screen image and send it to the signal driving motherboard 10 when receiving the current touch coordinates from the touch screen 30 .
  • the screen driving board 20 can be provided with a screen driving signal interface 201 and a touch signal interface 202, so that the screen driving board 20 can receive the current information of the current writing position from the touch screen 30 through the touch signal interface 202.
  • the first screen image is an image containing a historical writing track generated by the main chip module 40.
  • the first screen image is generated by the main chip module 40.
  • the module 40 sends a signal to the driving main board 10.
  • the screen driving board 20 is used to determine the writing color of the current touch coordinates from the color of the pixels included in the historical writing track, and drives the display screen 50 to display the first screen image, and in the first The pixels corresponding to the current touch coordinates in the screen image display the writing color to display the writing track of the current touch coordinates.
  • the touch screen 30 may be a touch screen integrated with the display screen 50 in the interactive tablet, or may be an external touch device connected to the interactive tablet.
  • the touch screen may be an infrared touch screen. screen, electromagnetic touch screen, capacitive touch screen, resistive touch screen, and pressure-sensitive touch screen.
  • the touch screen 30 can The preset sampling rate outputs the current touch coordinates of the current writing position.
  • the main chip module 40 can be a computer module with an operating system installed on the interactive tablet.
  • the operating system can be a Windows system, an Android system, etc.
  • the number of the main chip module 40 can be one or more than two, and the main chip module 40 is installed with
  • the main chip module 40 can be connected to the touch screen 30 through the USB interface or the RS232 interface, and the main chip module 40 can receive the touch coordinates generated by the writing operation from the touch screen 30 through the USB interface or the RS232 interface.
  • the interactive system is used in teaching as an example.
  • the main chip module 40 outputs the background image 1 to the display screen 50 for teaching display.
  • Writing on the screen generates a writing track 2, which is superimposed on the background image 1 and output to the display screen 50 as a screen image for display.
  • the signal driving mainboard 10 can be a module that digitizes the screen image output by the main chip module 40 and then outputs the digital signal to the screen driving board 20.
  • the signal driving mainboard 10 can be connected to the main chip module 40 through the image input interface.
  • HDMI High Definition Multimedia Interface, High Definition Multimedia Interface
  • VGA Video Graphics Array, Video Graphics Array Interface
  • the screen driver board 20 can be TCON (Timer Control Register, timer/counter control register).
  • the function of the screen driver board 20 is to drive the screen image signal sent from the main board 10
  • the main chip module 40 receives the touch coordinates of the current writing position output by the touch screen 30.
  • the main chip module 40 generates a writing trajectory according to the current touch coordinates, superimposes the writing trajectory into the screen image, and then drives the mainboard 10 through the signal to convert the screen image. output to the screen driver board 20.
  • the response time of the touch screen 30 is 5 ⁇ 20ms
  • the processing response time of the main chip module 40 is 40 ⁇ 60ms
  • the processing response time of the signal driving main board 10 is 20 ⁇ 30ms.
  • the response time of the display screen 50 is 8 to 10 ms, which results in a delay time of 70 to 120 ms for displaying the writing track of the current writing position on the display screen 50 after writing at the current writing position is completed.
  • the screen driver board 20 receives the current touch coordinates of the current writing position sent by the touch screen 30 through the touch signal interface 202, since the main chip module 40 generates the current touch coordinates of the current writing position, There is a delay in the screen image of the writing track, which has not yet been transmitted to the screen driving board 20 through the main chip module 40 and the signal driving motherboard 10.
  • the screen driving board 20 can determine it from the currently received first screen image containing the historical writing track.
  • the writing color of the current touch coordinates is displayed, where the first screen image may be the latest screen image received by the screen driver board 20 from the signal drive main board 10, and the historical writing track contained in the screen image does not include the current touch coordinates.
  • the writing track that is, the historical writing track is the writing track of the writing position before the current writing position.
  • the screen driver board 20 can determine the pixel corresponding to the current touch coordinate in the currently received first screen image to display the writing color to drive the display.
  • the screen 50 displays the writing trajectory of the current touch coordinates on the first screen image. There is no need to wait for the touch coordinates of the current writing position to be output to the main chip module 40.
  • the signal is passed Driving the main board 10 to output to the screen driver board 20 reduces the processing response time of the main chip module 40 (40-60ms) and the processing response time of the signal driving mainboard 10 (20-30ms), and can reduce the writing track display delay by 60 -90ms, thereby reducing the writing track display delay from 70-120ms to 10-30ms, realizing that the screen driver board 20 receives the current touch coordinates of the current writing position and displays the corresponding writing track, shortening the writing track display delay, and realizing Synchronizes writing operations and display.
  • the interactive system of the present embodiment may further include a memory 60, which is connected to the screen driver board 20.
  • the memory 60 is used to store calibration data.
  • the calibration data includes pixel coordinates that match each touch coordinate.
  • the pixel coordinates may be the coordinates of each pixel in the display screen 50.
  • the screen driver board 20 is further used to search for pixel coordinates that match the current touch coordinates in the calibration data. Since the touch screen 30 and the display screen 50 are two independent components, in order to enable the touch coordinates to correspond to the pixels on the display screen 50, the pixel coordinates that match the touch coordinates on the display screen 50 can be quickly found through the calibration data.
  • the pixels corresponding to the pixel coordinates on the display screen 50 are the pixels that display the writing trajectory of the touch coordinates.
  • the screen driver board 20 can store the received screen image. For example, it can store a frame of screen image, specifically, store a frame of screen image before the currently received first screen image.
  • the stored The screen image is the second screen image, and then determine at least one target pixel in the first screen image that has the same pixel position and different pixel color as the second screen image, and for each current touch coordinate, from at least one target pixel Determine the pixel with the smallest distance between the pixel coordinates and the pixel coordinates of the current touch coordinates, determine the color of the pixel with the smallest distance as the writing color of the current touch coordinates, and match the pixel coordinates of the current touch coordinates in the first screen image. of pixels display the writing color.
  • FIG. 2C is the first screen image currently received by the screen driving board 20
  • FIG. 2D is the second screen image before the first screen image currently received by the screen driving board 20
  • Both the first screen image and the second screen image include historical writing tracks.
  • the user can perform a single touch on the touch screen 30, that is, a writing pen for writing operation, or it can be multi-touch. That is, more than two writing pens perform writing operations.
  • This example takes two writing pens performing writing operations as an example.
  • the historical writing track includes the first writing track 21 and the second writing track 22.
  • the image of the previous frame of the first screen image that is, the first screen image and the second screen image are adjacent images, and the second screen image is before the first screen image.
  • the two adjacent frames Only the writing track changes between the screen images, and the background image 1 does not change.
  • the first screen image and the second screen image can be compared, specifically comparing the pixels at the same position in the first screen image and the second screen image. color to determine pixels of different colors as target pixels.
  • the pixels included in area A in the first writing track 21 and the pixels included in area B in the second writing track 22 are target pixels. These target pixels are the writing track formed by the user continuing the writing operation after the second screen image shown in Figure 2D.
  • Each target pixel has a pixel coordinate.
  • the pixel coordinate matching the touch coordinate is determined.
  • the distance is calculated through the pixel coordinates of each touch coordinate matching and the pixel coordinates of the target pixel, so as to determine the pixel with the smallest distance among multiple target pixels, and determine the color of the pixel with the smallest distance as the current touch coordinate.
  • For writing color directly set the writing color to the pixel corresponding to the pixel coordinate matching the current touch coordinate in the first screen image, that is, the writing track of the current touch coordinate is obtained.
  • the screen driver board 20 receives two touch coordinates.
  • the corresponding pixels of the two touch coordinates in the first screen image are pixel P1 and pixel P2 respectively.
  • the pixel P1 The distance to pixel A in the first writing track 21 is the closest.
  • the color of pixel A can be used as the writing color of pixel P1 to display the writing track.
  • the distance between pixel P2 and pixel B in the second writing track 22 is the closest.
  • the color of pixel B can be used as the writing color of pixel P2.
  • This embodiment caches the second screen image before the currently received first screen image, and searches for target pixels with the same position and different colors in the first screen image to determine the historical writing trajectory, thereby converting the target pixel
  • the color is determined to be the writing color.
  • the color of the pixel corresponding to the pixel coordinate matching the current touch coordinate is directly set to the writing color, that is, the writing track of the current touch coordinate is obtained.
  • the screen driver board 20 is also used to determine the target pixel corresponding to the historical touch coordinates from the first screen image, where the historical touch coordinates are the previous touch coordinates before the current touch coordinates are received, For each current touch coordinate, determine the pixel with the smallest distance between the pixel coordinate and the pixel coordinate of the current touch coordinate from the target pixel, and determine the color of the pixel with the smallest distance as the writing color of the current touch coordinate. On the first screen The pixel corresponding to the pixel coordinates matching the current touch coordinates in the image displays the writing color.
  • the historical touch coordinates can be the previous touch coordinates of the current touch coordinates, and the screen driver board 20 can store the historical touch coordinates, because the writing track of the historical touch coordinates has been displayed in the first screen image.
  • the color of the writing track of the historical touch coordinates can be determined as the writing color of the current touch coordinates.
  • there are two writing pens performing writing operations and the screen driver board 20 receives the two current touch coordinates.
  • the pixels corresponding to the two current touch coordinates in the first screen image are pixel P1 and pixel P2 respectively.
  • the distance between pixel P1 and the pixel A corresponding to the historical touch coordinates in the first writing track 21 is closest.
  • the pixel A can be The color is used as the writing color of pixel P1 to display the writing track. Similarly, the distance between pixel P2 and pixel B corresponding to the historical touch coordinates in the second writing track 22 is closest, and the color of pixel B can be used as the writing color of pixel P2. .
  • This embodiment caches the historical touch coordinates and finds the target pixel corresponding to the historical touch coordinates in the first screen image, thereby determining the color of the target pixel as the writing color.
  • the amount of data stored in the historical touch coordinates is small. , takes up less storage space.
  • the writing color can be quickly determined, and the writing color can be displayed by finding the pixel coordinates corresponding to the pixel coordinates matching the current touch coordinates in the first screen image, that is, the writing track of the current touch coordinates can be obtained.
  • the screen driving board 20 can receive the current touch coordinates from the touch screen 30 through the touch signal interface 202 and determine the writing color through the historical writing track in the first screen image, it can directly drive the display screen 50 in the first screen image.
  • the pixels matching the current touch coordinates display the writing color.
  • the drive board takes 20 (20 ⁇ 30ms) time, that is, it saves at least 60 ⁇ 90ms, reduces the writing track delay from 70-120ms to 10-30ms, shortens the writing track display delay, and improves the synchronization performance of writing and display. .
  • FIG 3 is a schematic diagram of the topology of a board card provided in Embodiment 2 of the present application.
  • the board card 100 in this embodiment includes a signal driver main board 10, a screen driver board 20 and a main chip module 40.
  • the signal driver The main board 10 is connected to the screen driver board 20 and the main chip module 40 respectively.
  • the board 100 in this embodiment may be an integrated board, that is, the signal driving main board 10, the screen driving board 20 and the main chip module 40 are integrated on one circuit board.
  • the board 100 may also be composed of more than one circuit board, that is, the signal driving board 100 may be integrated on one circuit board.
  • At least one of the main driving board 10, the screen driving board 20 and the main chip module 40 is an independent circuit board, and each circuit board is connected through a connecting line or a plug interface.
  • the screen driving board 20 is provided with a screen driving signal interface. 201 and touch signal interface 202, the screen driving signal interface of the screen driving board 20 is connected to the signal driving main board 10, the touch signal interface 20 of the screen driving board 20 is connected to the touch screen, and the screen driving board 20 is also connected to the display screen. Drives the display to display images.
  • the main chip module 40 is connected to the signal driving mainboard 10 and the touch screen respectively.
  • the main chip module 40 can be a computer module with an operating system installed.
  • the main chip module 40 is installed with a writing application, such as whiteboard software, drawing software, etc. When the writing application is opened, writing operations can be performed on the touch screen.
  • the touch screen can be a touch screen integrated with the display screen on an interactive tablet, or it can be a touch screen other than an interactive tablet.
  • the main chip module 40 can be connected to the touch screen via a USB interface or an RS232 interface to receive touch coordinates generated by a writing operation from the touch screen, and generate a writing trajectory based on the touch coordinates, superimpose the writing trajectory on the image that the main chip module 40 currently needs to output as a screen image, and send the screen image to the signal driving mainboard 10.
  • the signal driving mainboard 10 can be a module that digitizes the screen image output by the main chip module 40 and then outputs the digital signal to the screen driving board 20.
  • the signal driving mainboard 10 can be connected to the main chip module 40 through an image input interface.
  • an image input interface For example, through HDMI (High Definition Multimedia Interface, High Definition Multimedia Interface), or VGA (Video Graphics Array, Video Graphics Array Interface).
  • the screen driver board 20 can be TCON (Timer Control Register, timer/counter control register).
  • the function of the screen driver board 20 is to drive the screen image signal sent from the main board 10
  • the screen driving board 20 is used to receive the current touch coordinates of the current writing position of the touch screen, and to receive the first screen image from the signal driving motherboard 10.
  • the first screen image is the signal driving motherboard.
  • the received image containing the historical writing track may, for example, be an image containing the historical writing track sent by the main chip module 40 to the signal driving motherboard 10.
  • the screen driving motherboard 20 determines the current image from the color of the pixels contained in the historical writing track.
  • the writing color of the touch coordinates drives the display screen to display the first screen image, and drives the display screen to display the writing color in the pixels corresponding to the current touch coordinates in the first screen image, so as to drive the display screen to display the writing track of the current touch coordinates.
  • the screen driver board 20 can determine the writing color of the current touch coordinates from the currently received first screen image containing the historical writing track.
  • the historical writing track contained in the screen image does not include
  • the screen driver board 20 can determine the writing color of the pixel corresponding to the current touch coordinates in the currently received first screen image, so as to drive the display screen to display in the received first screen image.
  • the writing track of the current touch coordinates does not need to wait for the touch coordinates of the current writing position to be output to the main chip module 40.
  • the board 20 reduces the processing response time (40-60ms) of the main chip module 40 and the processing response time (20-30ms) of the signal drive mainboard 10, and can reduce the writing track display delay by 60-90ms, thereby making the writing track display
  • the delay is reduced from 70-120ms to 10-30ms, enabling the screen driver board 20 to receive the current touch coordinates of the current writing position and display the corresponding writing track, shortening the writing track display delay, and achieving synchronization of writing operation and display.
  • FIG 4 is a flowchart of a writing trajectory display method provided in Embodiment 3 of the present application. This embodiment can be applied to the situation of displaying writing trajectories on a touch screen in an interactive system. This method can be implemented by the interactive system. As shown in Figure 4, the writing track display method includes:
  • the interactive system of this embodiment includes a signal driving motherboard 10, a screen driving board 20, a touch screen 30, a main chip module 40 and a display screen 50.
  • the screen driving board 20 can be a TCON (Timer Control Register). counter/counter control register), the function of the screen driver board 20 is to process the screen image signal sent by the signal driving motherboard 10 and convert it into a signal that can drive the liquid crystal display screen to drive the liquid crystal display screen to display the screen image.
  • the screen driving board 20 is provided with a screen driving signal interface 201 and a touch signal interface 202.
  • the touch signal interface 202 is used to receive the current touch coordinates of the current writing position from the touch screen 30.
  • the touch screen 30 may be a touch screen integrated with the display screen 50 in the interactive tablet, or may be an external touch device connected to the interactive tablet.
  • the touch screen 30 The current touch coordinates of the current writing position can be output according to a preset sampling rate, and the current touch coordinates can be output to the screen driving board 20 through the touch signal interface 202 .
  • the touch screen 30 can be a touch module in an interactive tablet, which includes an infrared touch frame and an MCU for identifying a touch position.
  • the MCU can identify a writing position within an area surrounded by the infrared touch frame and output the touch coordinates of the writing position to the screen driver board 2 through a touch signal interface 202.
  • the S402. Receive a first screen image from the signal-driven motherboard.
  • the first screen image is an image generated by the main chip module and contains a historical writing track.
  • the signal driving motherboard 10 can be a module that digitizes the screen image output by the main chip module 40 and then outputs the digital signal to the screen driving board 20.
  • the main chip module 40 can be a computer module with an operating system installed on the interactive tablet.
  • the main chip module Writing applications, such as whiteboard software, drawing software, etc., are installed on the touch screen 40. When the writing application is opened, writing operations can be performed on the touch screen 30.
  • the main chip module 40 receives the touch coordinates generated by the writing operation from the touch screen 30, generates a writing trajectory based on the touch coordinates, and superimposes the writing trajectory on the image that the main chip module 40 currently needs to output as The screen image is output to the signal driving motherboard 10 .
  • the signal driving motherboard 10 converts the screen image into a digital signal and then outputs it to the screen driving board 20 through the screen driving signal interface 201 .
  • S403. Determine the writing color of the current touch coordinates from the colors of the pixels included in the historical writing track.
  • the main chip module 40 receives the touch coordinates of the current writing position output by the touch screen 30.
  • the main chip module 40 generates a writing trajectory according to the current touch coordinates, superimposes the writing trajectory into the screen image, and then drives the mainboard 10 through the signal to convert the screen image. output to the screen driver board 20.
  • the response time of the touch screen 30 is 5 ⁇ 20ms
  • the processing response time of the main chip module 40 is 40 ⁇ 60ms
  • the processing response time of the signal driving main board 10 is 20 ⁇ 30ms.
  • the response time of the display screen 50 is 8 to 10 ms, which results in a delay time of 70 to 120 ms for displaying the writing track of the current writing position on the display screen 50 after writing at the current writing position is completed.
  • the writing track of the current touch coordinates has not yet been superimposed on the screen image and transmitted to the screen driver board 20 , that is, the first screen image currently received by the screen driver board 20
  • the writing trajectory of does not yet include the writing trajectory of the current touch coordinates.
  • the writing trajectory in the first screen image is the historical writing trajectory formed by the historical touch coordinates before the current touch coordinates.
  • the screen driver board 20 can determine the historical writing trajectory from the first screen image, and determine the historical writing trajectory from the historical writing trajectory.
  • the writing color of the current touch coordinate is determined from the colors of the included pixels. For example, the color of the pixel with the smallest distance from the pixel corresponding to the current touch coordinate among the pixels included in the historical writing track is determined as the writing color.
  • the pixel corresponding to the current touch coordinate in the first screen image can be determined, and the first screen image with the updated writing color is displayed on the pixel, so as to generate the current touch coordinate in the first screen image.
  • the screen driver board converts the signal of the first screen image to drive the LCD display to display the updated first screen image, and then quickly displays the writing track of the current touch coordinates.
  • the screen driving board in the embodiment of the present application receives the current touch coordinates of the current writing position from the touch screen, and receives the first screen image from the signal driving main board.
  • the first screen image contains the historical writing track generated by the main chip module.
  • Image the screen driver board determines the writing color of the current touch coordinates from the color of the pixels included in the historical writing track, drives the display screen to display the first screen image, and displays writing on the pixels corresponding to the current touch coordinates in the first screen image Color to display the writing track of the current touch coordinates. Since the screen driver board can directly receive the touch coordinates of the current writing position, directly determine the writing color of the touch coordinates in the first screen image containing the historical writing track, and drive the display screen to correspond to the touch coordinates in the first screen image.
  • the pixels display the writing color to display the writing track, which solves the problem of delay in the display of the writing track caused by the main chip module synthesizing the trajectory of the screen image and the touch coordinates and then sequentially driving the main board and the screen driver board to the display through signals. , shortening the writing track display delay and achieving synchronization of writing operations and display.
  • Figure 5 is a flow chart of a writing track display method provided in Embodiment 4 of the present application. This embodiment is optimized on the basis of the above-mentioned Embodiment 3. As shown in Figure 5, the writing track display method includes:
  • the S502 Receive a first screen image from the signal-driven mainboard.
  • the first screen image is an image generated by the main chip module and contains a historical writing track.
  • S503. Determine at least one target pixel in the first screen image that has the same pixel position and different pixel color as the second screen image.
  • the second screen image is the previous frame image received before the first screen image is received.
  • the screen driver board can store a second screen image.
  • the second screen image is the previous frame image received before the first screen image is received.
  • the first screen image and the second screen image are both main chips.
  • the image generated by the module containing the historical writing track, that is, the first screen image and the second screen image are adjacent frame screen images, and the second screen image is before the first screen image.
  • the screen driver board When the screen driver board receives the first screen image, it can determine in the first screen image at least one target pixel with the same pixel position and different pixel color as that in the second screen image, as shown in Figures 2C and 2D.
  • Figure 2C is the first screen image currently received by the screen driver board
  • Figure 2D is the second screen image before the first screen image currently received by the screen driver board.
  • Both the first screen image and the second screen image include historical writing tracks.
  • the user can perform a single-point touch on the touch screen, that is, a writing pen for writing operation, or a multi-point touch, that is, more than two writing pens for writing operation. This example takes the writing operation of two writing pens as an example.
  • the historical writing tracks include a first writing track 21 and a second writing track 22. Since the second screen image is the screen driver board The previous frame image of the first screen image received by the dynamic board, that is, the first screen image and the second screen image are adjacent images and the second screen image is before the first screen image. During the writing operation, only the writing track changes between the two adjacent frames of the screen images, and the background image 1 does not change.
  • the first screen image and the second screen image can be compared, specifically, the pixel colors of the pixels at the same position in the first screen image and the second screen image are compared to determine the pixels with different pixel colors as the target pixels. As shown in FIG2C , the pixels contained in area A in the first writing track 21 and the pixels contained in area B in the second writing track 22 are target pixels. These target pixels are the writing tracks formed by the user continuing the writing operation after the second screen image shown in FIG2D .
  • For each current touch coordinate determine the pixel with the smallest distance between the pixel coordinate and the pixel coordinate of the current touch coordinate from at least one target pixel.
  • Each target pixel has pixel coordinates. For each touch coordinate, after determining the pixel coordinates matching the touch coordinates, the distance is calculated through the pixel coordinates matched by each touch coordinate and the pixel coordinates of the target pixel, so as to detect multiple targets. The pixel with the smallest distance is determined among the pixels.
  • the screen driver board receives two touch coordinates.
  • the corresponding pixels of the two touch coordinates in the first screen image are pixel P1 and pixel P2 respectively.
  • the pixel P1 and The pixel A in the first writing track 21 has the closest distance, and the pixel A can be determined as the pixel closest to the pixel P1.
  • the pixel P2 has the closest distance to the pixel B in the second writing track 22.
  • the pixel B can be determined as the closest pixel to the pixel P1.
  • Pixel P2 is the closest pixel.
  • the distance between pixel P1 and pixel A in the first writing track 21 is the closest.
  • the color of pixel A is used as the writing color of pixel P1 to display the writing track.
  • the distance between pixel P2 and pixel B in the second writing track 22 is Recently, the color of pixel B can be used as the writing color of pixel P2.
  • the screen driver board receives the current touch coordinates of the current writing position from the touch screen, and after receiving the first screen image from the signal driver motherboard, caches the second screen image before the currently received first screen image.
  • Image find the target pixels with the same position and different colors in the first screen image to determine the historical writing trajectory, thereby determining the color of the target pixel as the writing color, and driving the display screen to match the current touch coordinates in the first screen image
  • the pixels corresponding to the pixel coordinates display the writing color, that is, the writing trajectory of the current touch coordinates is obtained, which solves the problem of synthesizing the screen image and the trajectory of the touch coordinates through the main chip module and then sequentially driving the motherboard and screen driver board through signals to output to the display screen.
  • the problem of writing track display delay caused by display shortens the writing track display delay and realizes the synchronization of writing operation and display.
  • Figure 6 is a flow chart of a writing track display method provided in Embodiment 5 of the present application. This embodiment is optimized on the basis of the above-mentioned Embodiment 3. As shown in Figure 6, the writing track display method includes:
  • the S602. Receive a first screen image from the signal-driven motherboard.
  • the first screen image is an image generated by the main chip module and contains a historical writing track.
  • the screen driver board of this embodiment can store historical touch coordinates, for example, store a historical touch coordinate before the current touch coordinate, that is, the historical touch coordinate and the current touch coordinate are two adjacent touch coordinates, and the history
  • the writing track corresponding to the touch coordinates has been displayed in the first screen image.
  • the target pixel corresponding to the historical touch coordinates can be determined from the first screen image.
  • the historical touch coordinates can be searched in the pre-stored calibration data.
  • the corresponding pixel coordinates, and the pixel corresponding to the pixel coordinates in the first screen image is the target pixel.
  • the writing operation can be a single-touch operation or a multi-touch operation. Take the two writing pens performing the writing operation in Figure 2C as an example.
  • the current touch coordinate can also be found from the calibration data.
  • For the pixel coordinates corresponding to the touch coordinates calculate the distance between the pixel coordinates of the current touch coordinates and the pixel coordinates of the target pixel, thereby obtaining the pixel with the smallest distance from the pixel coordinates of the current touch coordinates.
  • the screen driver board 20 receives two current touch coordinates, and the pixels corresponding to the two current touch coordinates in the first screen image are pixel P1 and pixel P2 respectively.
  • Pixel P1 is closest to pixel A corresponding to the historical touch coordinates in the first writing trajectory 21
  • pixel P2 is closest to pixel B corresponding to the historical touch coordinates in the second writing trajectory 22.
  • the writing color usually does not change during the continuous writing operation, and the writing colors of adjacent or similar pixels are the same, the color of the pixels adjacent or similar to the pixel at the current touch coordinates can be used as the writing color.
  • the screen driver board 20 receives two current touch coordinates.
  • the corresponding pixels of the two current touch coordinates in the first screen image are pixel P1 and pixel P2 respectively.
  • the distance between the pixel P1 and the pixel A corresponding to the historical touch coordinates in the first writing track 21 is closest, and the color of the pixel A can be used as the writing color of the pixel P1.
  • the distance between the pixel P2 and the historical touch coordinates in the second writing track 22 The distance between pixel B corresponding to the touch coordinates is the closest, and the color of pixel B can be used as the writing color of pixel P2.
  • the pixel corresponding to the pixel coordinate matching the current touch coordinate can be directly set to the writing color in the first screen image, that is, the writing track of the current touch coordinate is obtained.
  • the screen driver board receives the current touch coordinates of the current writing position from the touch screen, and after receiving the first screen image from the signal driver main board, determines the target pixel corresponding to the historical touch coordinates from the first screen image.
  • the touch coordinates are the previous touch coordinates before the current touch coordinates are received.
  • the target pixel corresponding to the historical touch coordinates is determined in the first screen image, and the pixel coordinates and the pixel of the current touch coordinates are determined from the target pixel.
  • the pixel with the smallest coordinate distance determines the color of the pixel with the smallest distance as the writing color of the current touch coordinates, and drives the display screen to display the writing color in the pixel corresponding to the pixel coordinates matching the current touch coordinates in the first screen image, solving the problem of passing
  • the main chip module synthesizes the trajectory of the screen image and touch coordinates and then outputs the signal to the main board and the screen driver board to the display screen in turn.
  • the problem of writing trajectory display delay caused by this shortens the writing trajectory display delay and realizes writing operations and Show synchronization.
  • the color of the target pixel is determined as the writing color.
  • the amount of historical touch coordinate data stored is small. It takes up less storage space.
  • it matches target pixels through touch coordinates which is highly efficient and can quickly determine the writing color and further reduce the writing track display delay.
  • Figure 7 is a flow chart of a writing track display method provided in Embodiment 6 of the present application. This embodiment can be applied to the situation where a board drives the display screen to display the writing track on the touch screen. This method can be implemented by the board. . As shown in Figure 7, the writing track display method includes:
  • the board card of this embodiment includes a signal driver motherboard 10, a screen driver board 20 and a main chip module 40.
  • the screen driver board 20 can be a TCON (Timer Control Register, timer/counter control register), and the screen driver
  • the function of the board 20 is to process the screen image signal sent by the signal driving main board 10 and convert it into a signal that can drive the liquid crystal display screen to drive the liquid crystal display screen to display the screen image.
  • the screen driving board 20 may receive the current touch coordinates of the current writing position from the touch screen connected to the board 100 .
  • the first screen image is an image containing historical writing tracks.
  • the signal driving motherboard 10 can be a module that digitizes the screen image output by the main chip module 40 and then outputs the digital signal to the screen driving board 20 .
  • the main chip module 40 can be an interactive tablet with an operating system installed on it.
  • Computer module the main chip module 40 is installed with a writing application program, such as whiteboard software, drawing software, etc.
  • a writing application program such as whiteboard software, drawing software, etc.
  • the main chip module 40 receives the touch coordinates generated by the writing operation from the touch screen, generates a writing trajectory based on the touch coordinates, and superimposes the writing trajectory on the image that the main chip module 40 currently needs to output as a screen image, and output the screen image to the signal driving motherboard 10.
  • the signal driving motherboard 10 converts the screen image into a digital signal and outputs it to the screen driving board 20.
  • Obtaining the first screen image may be to obtain the screen driving board 20 from the main chip module. 40.
  • the latest screen image received, the first screen image is an image containing historical writing tracks.
  • S703. Determine the writing color of the current touch coordinates from the colors of the pixels included in the historical writing track.
  • the main chip module 40 receives the touch coordinates of the current writing position output by the touch screen 30.
  • the main chip module 40 generates a writing trajectory according to the current touch coordinates, superimposes the writing trajectory into the screen image, and then drives the mainboard 10 through the signal to convert the screen image. output to the screen driver board 20.
  • the response time of the touch screen 30 is 5 ⁇ 20ms
  • the processing response time of the main chip module 40 is 40 ⁇ 60ms
  • the processing response time of the signal driving main board 10 is 20 ⁇ 30ms.
  • the response time of the display screen 50 is 8 to 10 ms, which results in a delay time of 70 to 120 ms for displaying the writing track of the current writing position on the display screen 50 after writing at the current writing position is completed.
  • the writing track of the current touch coordinates has not yet been superimposed on the screen image and transmitted to the screen driver board 20 , that is, the first screen image currently received by the screen driver board 20
  • the writing trajectory of does not yet include the writing trajectory of the current touch coordinates.
  • the writing trajectory in the first screen image is the historical writing trajectory formed by the historical touch coordinates before the current touch coordinates.
  • the screen driver board 20 can determine the historical writing trajectory from the first screen image, and determine the historical writing trajectory from the historical writing trajectory.
  • the writing color of the current touch coordinate is determined from the colors of the included pixels. For example, the color of the pixel with the smallest distance from the pixel corresponding to the current touch coordinate among the pixels included in the historical writing track is determined as the writing color.
  • the pixel corresponding to the current touch coordinate in the first screen image can be determined, and the first screen image with the updated writing color is displayed on the pixel, so as to generate the current touch coordinate in the first screen image.
  • the screen driver board converts the signal of the first screen image to drive the LCD display to display the updated first screen image, and then quickly displays the writing track of the current touch coordinates.
  • the board card in the embodiment of the present application can receive the current touch coordinates of the current writing position from the touch screen, and obtain the first screen image.
  • the first screen image is an image containing the historical writing trajectory, and further obtains the image contained in the historical writing trajectory from the Determine the writing color of the current touch coordinates from the color of the pixel, drive the display screen to display the first screen image, and drive the display screen to display the writing color in the pixel corresponding to the current touch coordinates in the first screen image, so as to drive the display screen to display the current touch coordinates.
  • the writing track of the control coordinates is an image containing the historical writing trajectory, and further obtains the image contained in the historical writing trajectory from the Determine the writing color of the current touch coordinates from the color of the pixel, drive the display screen to display the first screen image, and drive the display screen to display the writing color in the pixel corresponding to the current touch coordinates in the first screen image, so as to drive the display screen to display the current touch coordinates.
  • the board can directly receive the touch coordinates of the current writing position, it can directly determine the writing color of the touch coordinates in the first screen image containing the historical writing track, and drive the display screen to display the corresponding touch coordinates in the first screen image.
  • the pixels display the writing color to display the writing trajectory, which solves the problem of writing trajectory display delay caused by the main chip module synthesizing the trajectory of the screen image and the touch coordinates and then sequentially outputting the signals to the main board and screen driver board to the display screen.
  • the writing track display delay is shortened and the writing operation and display are synchronized.
  • FIG. 8 is a schematic diagram of the topology of a display module provided in Embodiment 7 of the present application.
  • the display module 200 includes a display screen 50 and a screen drive board 20.
  • the display screen 50 is connected to the screen drive board 20.
  • the screen drive board 20 is used to receive the current touch coordinates and receive the third touch coordinate from the signal drive main board.
  • the first screen image is received by the signal driving motherboard connected to the display module 200 and contains historical writing.
  • the image of the trajectory and determine the writing color of the current touch coordinates from the color of the pixels contained in the historical writing trajectory, drive the display screen to display the first screen image, and drive the display screen to display the current touch coordinates corresponding to the first screen image.
  • the pixels display the writing color to drive the display to display the writing track of the current touch coordinates.
  • the screen driving board 20 may be provided with a touch signal interface 202 and a screen driving signal interface 201.
  • the touch signal interface 202 may be connected to the touch screen to receive the current signal from the touch screen connected to the display module 200.
  • the current touch coordinates of the writing position, the screen driver signal interface 202 can be connected to the signal driver motherboard to receive a screen image from the signal driver motherboard connected to the display module 200 , and the screen image can be a signal driver connected to the display module 200
  • the screen driver board 20 is also used to drive the display screen 50 to display the screen image based on the image received by the main board and containing the historical writing track.
  • the principle of displaying the writing track by the display module 200 of this embodiment can be referred to the interactive system of Embodiment 1, which will not be described in detail here.
  • the screen driver board 20 can determine the writing color of the current touch coordinates from the currently received first screen image containing the historical writing track.
  • the historical writing track contained in the screen image does not include According to the writing track of the current touch coordinates, the screen driver board 20 can drive the display screen 50 to display the writing color in the pixels corresponding to the current touch coordinates in the first screen image, without waiting for the touch coordinates of the current writing position to be output to the main chip module.
  • the writing trace generated in the main chip module is superimposed on the screen image, it is then output to the screen driver board 20 through the signal driver board, which reduces the processing response time of the main chip module (40-60ms) and the processing response time of the signal driver board (20 ⁇ 30ms), the writing track display delay can be reduced by 60-90ms, thereby reducing the writing track display delay from 70-120ms to 10-30ms, realizing that the screen driver board 20 can display the current touch coordinates of the current writing position after receiving it.
  • the corresponding writing track shortens the display delay of the writing track of the display module 200 and realizes the synchronization of writing operation and display on the display module 200 .
  • Figure 9 is a schematic diagram of the topology of an intelligent interactive tablet provided in Embodiment 8 of the present application.
  • the intelligent interactive tablet 300 of this embodiment includes a display screen 50 , a screen driving board 20 and a touch screen 30 .
  • the screen driving board 20 is connected to the display screen 50 and the touch screen 30 respectively.
  • the touch screen 30 may be a touch screen integrated with the display screen 50 in an intelligent interactive tablet.
  • the touch screen 30 may be an infrared touch screen, an electromagnetic touch screen, or a capacitive touch screen. , resistive touch screen, and pressure-sensitive touch screen.
  • the touch screen 30 can output the current touch of the current writing position according to a preset sampling rate. coordinates, and outputs the current touch coordinates to the screen driver board 20 through the touch signal interface.
  • the screen driver board 20 receives the current touch coordinates.
  • the screen driver board 20 also receives the first screen image from the signal driver motherboard.
  • the first screen image The signal connected to the intelligent interactive tablet 300 drives the image received by the mainboard and containing the historical writing track, determines the writing color of the current touch coordinates from the color of the pixels contained in the historical writing track, and drives the display screen to display the first screen image, and the writing color is displayed on the pixel corresponding to the current touch coordinate in the first screen image to display the writing track of the current touch coordinate.
  • the screen driver board 20 after the screen driver board 20 receives the current touch coordinates of the current writing position sent by the touch screen 30, due to the delay in the screen image containing the writing track of the current writing position, the main board has not yet been driven by the signal. Transmitted to the screen driver board 20, the screen driver board 20 can determine the writing color of the current touch coordinates from the currently received first screen image containing the historical writing track. The historical writing track contained in the screen image does not include For the writing track of the current touch coordinates, the screen driver board 20 drives the display screen 50 to display the writing color on the pixel corresponding to the current touch coordinates in the first screen image, so as to display the writing of the current touch coordinates on the received first screen image.
  • the processing response time (40 ⁇ 60ms) and the processing response time of the signal driver motherboard (20 ⁇ 30ms) can reduce the writing track display delay by 60-90ms, thereby reducing the writing track display delay from 70-120ms to 10-30ms.
  • the screen driving board 20 receives the current touch coordinates of the current writing position and drives the display screen 50 to display the corresponding writing trajectory, shortening the writing trajectory display delay of the intelligent interactive tablet, and realizing the smooth operation and display of writing on the intelligent interactive tablet. Synchronize.
  • FIG10 shows a schematic diagram of the structure of a smart interactive tablet that can be used to implement an embodiment of the present application.
  • the smart interactive tablet includes at least one processor 71, and a memory connected to the at least one processor 71 in communication, such as a read-only memory (ROM) 72, a random access memory (RAM) 73, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 71 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 72 or the computer program loaded from the storage unit 78 to the random access memory (RAM) 73.
  • RAM 73 various programs and data required for the operation of the smart interactive tablet can also be stored.
  • the processor 71, ROM 72, and RAM 73 are connected to each other via a bus 74.
  • An input/output (I/O) interface 75 is also connected to the bus 74.
  • I/O interface 75 Multiple components in the smart interactive tablet are connected to the I/O interface 75, including: input unit 76, such as keyboard, mouse, touch screen, etc.; output unit 77, such as various types of displays, speakers, etc.; storage unit 78, For example, a magnetic disk, an optical disk, etc.; and a communication unit 79, such as a network card, modem, wireless communication transceiver, etc.
  • the communication unit 79 allows the intelligent interactive tablet to exchange information/data with other devices through a computer network such as the Internet and/or various telecommunications networks.
  • Processor 71 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 71 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processing processor (DSP), and any appropriate processor, controller, microcontroller, etc.
  • the processor 71 executes each method and process described above, such as the writing track display method.
  • the writing track display method may be implemented as a computer program, which is tangibly included in a computer-readable storage medium, such as the storage unit 78 .
  • part or all of the computer program may be loaded and/or installed on the intelligent interactive tablet via the ROM 72 and/or the communication unit 79.
  • the processor 71 may be configured to perform the writing track display method in any other suitable manner (eg, by means of firmware).
  • Various implementations of the systems and techniques described above may be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip implemented in a system (SOC), load programmable logic device (CPLD), computer hardware, firmware, software, and/or a combination thereof.
  • FPGAs field programmable gate arrays
  • ASICs application specific integrated circuits
  • ASSPs application specific standard products
  • SOC system
  • CPLD load programmable logic device
  • computer hardware firmware, software, and/or a combination thereof.
  • These various embodiments may include implementation in one or more computer programs executable and/or interpreted on a programmable system including at least one programmable processor, the programmable processor
  • the processor which may be a special purpose or general purpose programmable processor, may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.
  • An output device may be a special purpose or general purpose programmable processor, may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.
  • An output device may be a special purpose or general purpose programmable processor, may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.
  • the computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer programs are executed by the processor, the functions/operations specified in the flow charts and/or block diagrams are implemented.
  • the computer programs may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.
  • a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device.
  • Computer-readable storage media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any suitable combination of the foregoing.
  • the computer-readable storage medium may be a machine-readable signal medium.
  • machine-readable storage media would include one or more wire-based electrical connections, laptop disks, hard drives, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • RAM random access memory
  • ROM read only memory
  • EPROM or flash memory erasable programmable read only memory
  • CD-ROM portable compact disk read-only memory
  • magnetic storage device or any suitable combination of the above.
  • the systems and techniques described herein may be implemented on a smart interactive tablet having a display device (eg, CRT (Cathode Ray Tube) or LCD (Liquid Crystal)) for displaying information to the user. Display) monitor); and a keyboard, a pointing device (such as a mouse or a trackball) and a touch screen through which the user can provide input to the intelligent interactive tablet.
  • a display device eg, CRT (Cathode Ray Tube) or LCD (Liquid Crystal)
  • a keyboard e.g., a keyboard
  • a pointing device such as a mouse or a trackball
  • touch screen e.g., a touch screen
  • Other kinds of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and may be provided in any form, including Acoustic input, voice input or tactile input) to receive input from the user.

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Abstract

本申请公开了一种交互系统、板卡、书写轨迹显示方法、平板和存储介质，交互系统包括信号驱动主板、屏幕驱动板、触控屏和主芯片模块，主芯片模块分别与信号驱动主板和触控屏连接，屏幕驱动板分别与触控屏和信号驱动主板连接；屏幕驱动板从触控屏接收当前书写位置的当前触控坐标，以及从信号驱动主板接收第一屏幕图像，第一屏幕图像为信号驱动主板所接收到的包含历史书写轨迹的图像；屏幕驱动板从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以显示当前触控坐标的书写轨迹，该交互系统能够缩短书写轨迹显示延迟，实现书写操作和显示的同步。

Description

交互系统、板卡、书写轨迹显示方法、平板和存储介质 技术领域
本申请涉及触控设备图像处理技术领域，尤其涉及一种交互系统、板卡、书写轨迹显示方法、平板和存储介质。
背景技术
随着交互平板应用于教育、会议等场景，交互平板上使用触控功能进行书写操作的应用越来越多，对书写轨迹显示提出了更高要求。
如图1所示，现有的交互系统中，包括信号驱动主板10、屏幕驱动板20、触控屏30、主芯片模块40以及显示屏50，主芯片模块40输出屏幕图像信号到信号驱动主板10，信号驱动主板10对图像信号处理后输出到屏幕驱动板20，屏幕驱动板20将图像信号转换为屏显信号来驱动显示屏50显示屏幕图像，当需要通过触控屏30在屏幕图像上进行书写操作时，用户在触控屏30书写操作所产生的书写轨迹在主芯片模块40叠加到屏幕图像中，从而在显示屏50同时显示屏幕图像和书写轨迹。
上述现有交互系统中，触控屏30所产生的书写轨迹需要经过主芯片模块40、信号驱动主板10、屏幕驱动板20等多个模块和模块之间的连接接口，导致在触控屏30上进行书写操作后，书写轨迹需要延迟较长时间才在显示屏50中显示。
发明内容
本申请提供了一种交互系统、板卡、书写轨迹显示方法、平板和存储介质，以解决交互系统中书写轨迹显示延迟时间长的问题。
第一方面，本申请提供了一种交互系统，包括信号驱动主板、屏幕驱动板、触控屏和主芯片模块，所述主芯片模块分别与所述信号驱动主板和所述触控屏连接，所述屏幕驱动板分别与所述触控屏和所述信号驱动主板连接；
所述触控屏用于生成当前书写位置的当前触控坐标；
所述主芯片模块用于从所述触控屏接收到所述当前触控坐标时，生成屏幕图像并发送到所述信号驱动主板；
所述屏幕驱动板用于：
从所述触控屏接收当前书写位置的当前触控坐标；
从所述信号驱动主板接收第一屏幕图像，所述第一屏幕图像为所述信号驱动主板所接收到的包含历史书写轨迹的图像；
从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
第二方面，本申请提供了一种板卡，包括信号驱动主板、屏幕驱动板和主芯片模块，所述信号驱动主板分别与所述屏幕驱动板和所述主芯片模块连接；
所述主芯片模块用于接收当前触控坐标，并生成屏幕图像发送到所述信号驱动主板，其中所述当前触控坐标从与所述板卡连接的触控屏的当前书写位置获取；
所述屏幕驱动板用于：
接收所述当前触控坐标，以及
从所述信号驱动主板接收第一屏幕图像，所述第一屏幕图像为所述信号驱动主板所接收到的包含历史书写轨迹的图像；
从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
第三方面，本申请提供了一种书写轨迹显示方法，应用于第一方面所述的交互系统，包括：
从触控屏接收当前书写位置的当前触控坐标；
从信号驱动主板接收第一屏幕图像，所述第一屏幕图像为主芯片模块所生成的包含历史书写轨迹的图像；
从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
第四方面，本申请提供一种书写轨迹显示方法，应用于第二方面所述的板卡，包括：
接收当前触控坐标，所述当前触控坐标从与所述板卡连接的触控屏的当前 书写位置获取；
获取第一屏幕图像，所述第一屏幕图像为包含历史书写轨迹的图像；
从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
第五方面，本申请提供了一种显示模组，包括显示屏和屏幕驱动板，所述显示屏和所述屏幕驱动板连接，所述屏幕驱动板用于：
当前触控坐标，所述当前触控坐标从与所述显示模组连接的触控屏的当前书写位置获取；
接收第一屏幕图像，所述第一屏幕图像为与所述显示模组连接的信号驱动主板所接收到的、包含历史书写轨迹的图像；
从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
第六方面，本申请提供了一种智能交互平板，包括显示屏、屏幕驱动板和触控屏，所述屏幕驱动板分别与所述显示屏和所述触控屏连接；
所述屏幕驱动板用于：
接收当前触控坐标，所述当前触控坐标从所述触控屏的当前书写位置获取；
接收第一屏幕图像，所述第一屏幕图像为与所述智能交互平板连接的信号驱动主板所接收到的、包含历史书写轨迹的图像；
从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
第七方面，本申请提供了一种智能交互平板，所述智能交互平板包括：
至少一个处理器；以及
与所述至少一个处理器通信连接的存储器；其中，
所述存储器存储有可被所述至少一个处理器执行的计算机程序，所述计算机程序被所述至少一个处理器执行，以使所述至少一个处理器能够执行本申请第二方面所述的书写轨迹显示方法。
第八方面，本申请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计算机指令，所述计算机指令用于使处理器执行时实现本申请第二方面所述的书写轨迹显示方法。
本申请实施例的交互系统中，屏幕驱动板可以从触控屏接收当前书写位置的当前触控坐标，以及从信号驱动主板接收第一屏幕图像，该第一屏幕图像为信号驱动主板所接收到的包含历史书写轨迹的图像，屏幕驱动板从历史书写轨迹所包含的像素的颜色中确定当前触控坐标的书写颜色，驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以显示当前触控坐标的书写轨迹。由于屏幕驱动板可直接接收到当前书写位置的触控坐标，直接在包含历史书写轨迹的第一屏幕图像中确定出触控坐标的书写颜色，驱动显示屏在第一屏幕图像中触控坐标对应的像素显示书写颜色以显示书写轨迹，解决了通过主芯片模块将屏幕图像和触控坐标的轨迹合成后依次通过信号驱动主板、屏幕驱动板输出到显示屏显示所导致的书写轨迹显示延迟的问题，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
应当理解，本部分所描述的内容并非旨在标识本申请的实施例的关键或重要特征，也不用于限制本申请的范围。本申请的其它特征将通过以下的说明书而变得容易理解。
附图说明
为了更清楚地说明本申请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简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术的交互系统的拓扑结构示意图；
图2A是本申请实施例一的一种交互系统的拓扑结构示意图；
图2B是本实施例中屏幕图像的示意图；
图2C是本实施例中第一屏幕图像的示意图；
图2D是本实施例中第二屏幕图像的示意图；
图3是本申请实施例二提供的一种板卡的拓扑结构示意图；
图4是本申请实施例三提供的一种书写轨迹显示方法的流程图；
图5是本申请实施例四提供的一种书写轨迹显示方法的流程图；
图6是本申请实施例五提供的一种书写轨迹显示方法的流程图；
图7是本申请实施例六提供的一种书写轨迹显示方法的流程图；
图8是本申请实施例七提供的一种显示模组的拓扑结构示意图；
图9是本申请实施例八提供的一种智能交互平板的拓扑结构示意图；
图10是本申请实施例九提供的一种智能交互平板的拓扑结构示意图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，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，都应当属于本申请保护的范围。
实施例一
图2A为本申请实施例一提供的一种交互系统的拓扑结构示意图，如图2A所示，本实施例的交互系统包括信号驱动主板10、屏幕驱动板20、触控屏30、主芯片模块40以及显示屏50。
其中，主芯片模块40分别与信号驱动主板10和触控屏30连接，屏幕驱动板20分别与触控屏30和信号驱动主板10连接。触控屏30用于生成当前书写位置的当前触控坐标，主芯片模块40用于从触控屏30接收到当前触控坐标时，生成屏幕图像并发送到信号驱动主板10。
在一个可选实施例中，屏幕驱动板20可以设置有驱屏信号接口201和触控信号接口202，使得屏幕驱动板20可以通过触控信号接口202从触控屏30接收当前书写位置的当前触控坐标，以及通过驱屏信号接口201从信号驱动主板10接收第一屏幕图像，该第一屏幕图像为主芯片模块40所生成的包含历史书写轨迹的图像，该第一屏幕图像由主芯片模块40发送到信号驱动主板10，屏幕驱动板20用于从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，驱动显示屏50显示第一屏幕图像，并在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以显示当前触控坐标的书写轨迹。
本实施例中，触控屏30可以是交互平板中与显示屏50一体化的触控屏，还可以是交互平板外接的触控设备，在一个示例中，触控屏可以是红外式触控 屏、电磁式触控屏、电容式触控屏、电阻式触控屏、压感式触控屏中的一种，当用户在触控屏30上进行书写操作时，触控屏30可以按照预设的采样率输出当前书写位置的当前触控坐标。
主芯片模块40可以是交互平板上安装有操作系统的计算机模块，操作系统可以是Windows系统、Android系统等，该主芯片模块40的数量可以是一个或者两个以上，并且主芯片模块40上安装有书写应用程序，例如白板软件、绘图软件等，书写应用程序打开时可以在触控屏30上进行书写操作。本实施例中，主芯片模块40可以通过USB接口或者RS232接口与触控屏30连接，主芯片模块40可以通过USB接口或者RS232接口从触控屏30接收由书写操作所产生的触控坐标，并根据触控坐标生成书写轨迹，将书写轨迹叠加在主芯片模块40当前需要输出的图像中作为屏幕图像，并将该屏幕图像输出到信号驱动主板10，如图2B所示为屏幕图像的一个示意图，在图2B中以交互系统应用于教学作为示例，主芯片模块40将背景图像1输出到显示屏50进行教学展示，在打开主芯片模块40中的白板软件后，通过在触控屏30上书写产生书写轨迹2，该书写轨迹2叠加在背景图像1上作为屏幕图像输出到显示屏50展示。
信号驱动主板10可以是将主芯片模块40输出的屏幕图像数字化后输出数字信号到屏幕驱动板20的模块，在本实施例中，信号驱动主板10可以通过图像输入接口与主芯片模块40连接，例如通过HDMI(High Definition Multimedia Interface，高清晰度多媒体接口)，或者是VGA(Video Graphics Array，视频图形阵列接口)。
屏幕驱动板20可以是TCON(Timer Control Register，定时器/计数器控制寄存器)，屏幕驱动板20的作用是把信号驱动主板10送来的屏幕图像信号
进行处理后，转换成能驱动液晶显示屏的信号，以驱动液晶显示屏显示屏幕图像。
如图1所示，在现有交互系统中，在主芯片模块40输出屏幕图像的过程中，当用户打开主芯片模块40上的白板软件并且在触控屏30上进行书写操作时，主芯片模块40接收到触控屏30输出的当前书写位置的触控坐标，主芯片模块40根据当前触控坐标生成书写轨迹，将该书写轨迹叠加到屏幕图像中，再通过信号驱动主板10将屏幕图像输出到屏幕驱动板20，在此过程中，触控屏30的响应时间为5～20ms，主芯片模块40的处理响应时间为40～60ms，信号驱动主板10的处理响应时间为20～30ms，显示屏50的响应时间为8～10ms，从而导致在当前书写位置书写结束之后，在显示屏50显示当前书写位置的书写轨迹的延迟 时间为70～120ms。
相对于现有交互系统，本实施例屏幕驱动板20通过触控信号接口202接收到触控屏30发送的当前书写位置的当前触控坐标后，由于主芯片模块40所生成的包含当前书写位置的书写轨迹的屏幕图像存在延迟，尚未通过主芯片模块40、信号驱动主板10传输到屏幕驱动板20，屏幕驱动板20可以从当前所接收到的、包含历史书写轨迹的第一屏幕图像中确定出当前触控坐标的书写颜色，其中，第一屏幕图像可以是屏幕驱动板20从信号驱动主板10接收到的最新的屏幕图像，该屏幕图像所包含的历史书写轨迹不包含当前触控坐标的书写轨迹，即历史书写轨迹是当前书写位置之前的书写位置的书写轨迹，屏幕驱动板20可以在当前所接收到的第一屏幕图像中确定当前触控坐标对应的像素显示书写颜色，以驱动显示屏50在第一屏幕图像显示当前触控坐标的书写轨迹，无需等待当前书写位置的触控坐标输出到主芯片模块40，在主芯片模块40中生成书写轨迹叠加到屏幕图像之后，再通过信号驱动主板10来输出到屏幕驱动板20，减少了主芯片模块40的处理响应时间(40～60ms)、信号驱动主板10的处理响应时间(20～30ms)，可以将书写轨迹显示延迟减少了60-90ms，从而使得书写轨迹显示延迟从70-120ms降低到10-30ms，实现了屏幕驱动板20接收到当前书写位置的当前触控坐标即显示对应的书写轨迹，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
为了使得本领域技术人员更清楚地理解本实施例的交互系统对书写轨迹的显示过程，以下结合示例进行说明。
如图2A所示，本实施例的交互系统还可以包括存储器60，存储器60与屏幕驱动板20连接，该存储器60用于存储校准数据，在一个示例中，校准数据包括每个触控坐标匹配的像素坐标，像素坐标可以是显示屏50中每个像素的坐标，屏幕驱动板20还用于在校准数据中查找当前触控坐标匹配的像素坐标，由于触控屏30和显示屏50属于两个独立的元件，为了使得触控坐标能够对应到显示屏50上的像素，通过校准数据可以快速查找出触控坐标在显示屏50上匹配的像素坐标，该像素坐标在显示屏50上对应的像素即为显示触控坐标的书写轨迹的像素。
在一个可选实施例中，屏幕驱动板20可以存储所接收到的屏幕图像，例如可以存储一帧屏幕图像，具体为存储当前所接收到的第一屏幕图像之前的一帧屏幕图像，所存储的屏幕图像为第二屏幕图像，然后在第一屏幕图像中确定出与第二屏幕图像中像素位置相同、像素颜色不同的至少一个目标像素，针对每 个当前触控坐标，从至少一个目标像素中确定出像素坐标与当前触控坐标的像素坐标距离最小的像素，将距离最小的像素的颜色确定为当前触控坐标的书写颜色，在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示书写颜色。
如图2C和图2D所示，图2C为屏幕驱动板20当前所接收到的第一屏幕图像，图2D为屏幕驱动板20当前所接收到的第一屏幕图像之前的第二屏幕图像，第一屏幕图像和第二屏幕图像中均包括历史书写轨迹，在本示例中，用户可以在触控屏30上单点触控，即一支书写笔进行书写操作，也可以是多点触控，即两支以上书写笔进行书写操作，本示例以两支书写笔进行书写操作为例，历史书写轨迹包括第一书写轨迹21和第二书写轨迹22，由于第二屏幕图像是屏幕驱动板20接收到的第一屏幕图像的前一帧图像，即第一屏幕图像和第二屏幕图像为相邻的图像，并且第二屏幕图像在第一屏幕图像之前，在书写操作过程中，相邻两帧屏幕图像之间只有书写轨迹在变化，背景图像1不会发生变化，则可以将第一屏幕图像和第二屏幕图像对比，具体是比对第一屏幕图像和第二屏幕图像中相同位置像素的颜色，以确定出不同颜色的像素作为目标像素，如图2C所示，第一书写轨迹21中的区域A所包含的像素以及第二书写轨迹22中的区域B所包含的像素为目标像素，这些目标像素是由于用户在图2D所示的第二屏幕图像之后继续书写操作所形成的书写轨迹，每个目标像素具有像素坐标，对于每个触控坐标，确定该触控坐标匹配的像素坐标后，通过每个触控坐标匹配的像素坐标与目标像素的像素坐标计算距离，以在多个目标像素中确定出距离最小的像素，将该距离最小的像素的颜色确定为当前触控坐标的书写颜色，在第一屏幕图像中直接将当前触控坐标匹配的像素坐标对应的像素设置该书写颜色，即得到当前触控坐标的书写轨迹。
如图2C中，有两支书写笔进行书写操作，屏幕驱动板20接收到两个触控坐标，两个触控坐标在第一屏幕图像中对应的像素分别为像素P1和像素P2，像素P1与第一书写轨迹21中的像素A的距离最近，可以将像素A的颜色作为像素P1的书写颜色，从而显示书写轨迹，同理，像素P2与第二书写轨迹22中的像素B的距离最近，可以将像素B的颜色作为像素P2的书写颜色。
本实施例通过缓存当前所接收到的第一屏幕图像之前的第二屏幕图像，通过在第一屏幕图像中查找出位置相同、颜色不同的目标像素以确定出历史书写轨迹，从而将目标像素的颜色确定为书写颜色，在第一屏幕图像中直接将当前触控坐标匹配的像素坐标对应的像素的颜色设置为该书写颜色，即得到当前触 控坐标的书写轨迹。
在另一个实施例中，屏幕驱动板20还用于从第一屏幕图像中确定出历史触控坐标对应的目标像素，历史触控坐标为接收到当前触控坐标之前的前一个触控坐标，针对每个当前触控坐标，从目标像素中确定出像素坐标与当前触控坐标的像素坐标距离最小的像素，将距离最小的像素的颜色确定为当前触控坐标的书写颜色，在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示书写颜色。
如图2C所示，历史触控坐标可以是当前触控坐标的前一个触控坐标，屏幕驱动板20可以存储历史触控坐标，由于历史触控坐标的书写轨迹已经显示在第一屏幕图像中，可以将历史触控坐标的书写轨迹的颜色确定为当前触控坐标的书写颜色，如在图2C中，有两支书写笔进行书写操作，屏幕驱动板20接收到两个当前触控坐标，两个当前触控坐标在第一屏幕图像中对应的像素分别为像素P1和像素P2，像素P1与第一书写轨迹21中的历史触控坐标对应的像素A的距离最近，可以将像素A的颜色作为像素P1的书写颜色，从而显示书写轨迹，同理，像素P2与第二书写轨迹22中的历史触控坐标对应的像素B的距离最近，可以将像素B的颜色作为像素P2的书写颜色。
本实施例通过缓存历史触控坐标，通过在第一屏幕图像中查找出历史触控坐标对应的目标像素，从而将目标像素的颜色确定为书写颜色，一方面，存储历史触控坐标数据量小，占用存储空间少，另一方面，能够快速确定出书写颜色，以在第一屏幕图像中查找当前触控坐标匹配的像素坐标对应的像素显示书写颜色，即得到当前触控坐标的书写轨迹。
通过上述示例，由于屏幕驱动板20可以通过触控信号接口202从触控屏30接收当前触控坐标，并通过第一屏幕图像中的历史书写轨迹确定出书写颜色，直接驱动显示屏50在第一屏幕图像中将当前触控坐标匹配的像素显示书写颜色，相对于传统交互系统，节省了信号从主芯片模块40传输到信号驱动主板10(40～60ms)以及从信号驱动主板10传输到屏幕驱动板20(20～30ms)的时间，即至少节省了60～90ms的时间，将书写轨迹延迟从70-120ms降低到10-30ms，缩短了书写轨迹显示延迟，提高了书写和显示的同步性能。
实施例二
图3为本申请实施例二提供的一种板卡的拓扑结构示意图，如图3所示，本实施例的板卡100包括信号驱动主板10、屏幕驱动板20以及主芯片模块40，信号驱动主板10分别与屏幕驱动板20和主芯片模块40连接。
本实施例的板卡100可以是集成板卡，即信号驱动主板10、屏幕驱动板20以及主芯片模块40集成在一块电路板上，板卡100还可以是一块以上的电路板组成，即信号驱动主板10、屏幕驱动板20以及主芯片模块40中的至少一个为独立的电路板，各个电路板之间通过连接线或者插接口连接，示例性地，屏幕驱动板20设置有驱屏信号接口201和触控信号接口202，屏幕驱动板20的驱屏信号接口与信号驱动主板10连接，屏幕驱动板20的触控信号接口20与触控屏连接，屏幕驱动板20还与显示屏连接以驱动显示屏显示图像。
其中，主芯片模块40分别与信号驱动主板10和触控屏连接，主芯片模块40可以是安装有操作系统的计算机模块，该主芯片模块40上安装有书写应用程序，例如白板软件、绘图软件等，书写应用程序打开时可以在触控屏上进行书写操作，触控屏可以是交互平板上与显示屏一体化的触控屏，还可以是交互平板之外的触控屏。
本实施例中，主芯片模块40可以通过USB接口或者RS232接口与触控屏连接，以从触控屏接收由书写操作所产生的触控坐标，并根据触控坐标生成书写轨迹，将书写轨迹叠加在主芯片模块40当前需要输出的图像中作为屏幕图像，并将屏幕图像发送到信号驱动主板10。
信号驱动主板10可以是将主芯片模块40输出的屏幕图像数字化后输出数字信号到屏幕驱动板20的模块，在本实施例中，信号驱动主板10可以通过图像输入接口与主芯片模块40连接，例如通过HDMI(High Definition Multimedia Interface，高清晰度多媒体接口)，或者是VGA(Video Graphics Array，视频图形阵列接口)。
屏幕驱动板20可以是TCON(Timer Control Register，定时器/计数器控制寄存器)，屏幕驱动板20的作用是把信号驱动主板10送来的屏幕图像信号
进行处理后，转换成能驱动液晶显示屏的信号，以驱动液晶显示屏显示屏幕图像。
本实施例的板卡100中，屏幕驱动板20用于接收触控屏的当前书写位置的当前触控坐标，以及从信号驱动主板10接收第一屏幕图像，该第一屏幕图像为信号驱动主板所接收到的包含历史书写轨迹的图像，例如可以是主芯片模块40发送给信号驱动主板10的包含历史书写轨迹的图像，屏幕驱动主板20从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以驱动显示屏显示当前触控坐标的书写轨迹。
本实施例的板卡100中，屏幕驱动板20接收到触控屏发送的当前书写位置的当前触控坐标后，由于包含当前书写位置的书写轨迹的屏幕图像存在延迟，尚未通过信号驱动主板10传输到屏幕驱动板20，屏幕驱动板20可以从当前所接收到的、包含历史书写轨迹的第一屏幕图像中确定出当前触控坐标的书写颜色，该屏幕图像所包含的历史书写轨迹不包含当前触控坐标的书写轨迹，屏幕驱动板20可以在当前所接收到的第一屏幕图像中确定当前触控坐标对应的像素显示书写颜色，以驱动显示屏在所接收到的第一屏幕图像显示当前触控坐标的书写轨迹，无需等待当前书写位置的触控坐标输出到主芯片模块40，在主芯片模块40中生成书写轨迹叠加到屏幕图像之后，再通过信号驱动主板10来输出到屏幕驱动板20，减少了主芯片模块40的处理响应时间(40～60ms)、信号驱动主板10的处理响应时间(20～30ms)，可以将书写轨迹显示延迟减少了60-90ms，从而使得书写轨迹显示延迟从70-120ms降低到10-30ms，实现了屏幕驱动板20接收到当前书写位置的当前触控坐标即显示对应的书写轨迹，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
实施例三
图4为本申请实施例三提供的一种书写轨迹显示方法的流程图，本实施例可适用于交互系统中显示触控屏上的书写轨迹的情况，该方法可以由交互系统来实现。如图4所示，该书写轨迹显示方法包括：
S401、从触控屏接收当前书写位置的当前触控坐标。
如图2A所示，本实施例的交互系统包括信号驱动主板10、屏幕驱动板20、触控屏30、主芯片模块40以及显示屏50，屏幕驱动板20可以是TCON(Timer Control Register，定时器/计数器控制寄存器)，屏幕驱动板20的作用是把信号驱动主板10发送的屏幕图像信号进行处理后，转换成能驱动液晶显示屏的信号，以驱动液晶显示屏显示屏幕图像。屏幕驱动板20设置有驱屏信号接口201和触控信号接口202，触控信号接口202用于从触控屏30接收当前书写位置的当前触控坐标。
其中，触控屏30可以是交互平板中与显示屏50一体化的触控屏，还可以是交互平板外接的触控设备，当用户在触控屏30上进行书写操作时，触控屏30可以按照预设的采样率输出当前书写位置的当前触控坐标，并将该当前触控坐标通过触控信号接口202输出到屏幕驱动板20。
在一个示例中，触控屏30可以是交互平板中的触控模组，该触控模组包括红外触摸框和识别触摸位置的MCU，该MCU可以识别位于红外触摸框所围成 的区域内的书写位置，并将书写位置的触控坐标通过触控信号接口202输出到屏幕驱动板2。
S402、从信号驱动主板接收第一屏幕图像，第一屏幕图像为主芯片模块所生成的包含历史书写轨迹的图像。
信号驱动主板10可以是将主芯片模块40输出的屏幕图像数字化后输出数字信号到屏幕驱动板20的模块，其中，主芯片模块40可以是交互平板上安装有操作系统的计算机模块，主芯片模块40上安装有书写应用程序，例如白板软件、绘图软件等，书写应用程序打开时可以在触控屏30上进行书写操作。本实施例中，主芯片模块40从触控屏30接收由书写操作所产生的触控坐标，并根据触控坐标生成书写轨迹，将书写轨迹叠加在主芯片模块40当前需要输出的图像中作为屏幕图像，并将该屏幕图像输出到信号驱动主板10，该信号驱动主板10将屏幕图像转换为数字信号后通过驱屏信号接口201输出到屏幕驱动板20。
S403、从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色。
如图1所示，在现有交互系统中，在主芯片模块40输出屏幕图像的过程中，当用户打开主芯片模块40上的白板软件并且在触控屏30上进行书写操作时，主芯片模块40接收到触控屏30输出的当前书写位置的触控坐标，主芯片模块40根据当前触控坐标生成书写轨迹，将该书写轨迹叠加到屏幕图像中，再通过信号驱动主板10将屏幕图像输出到屏幕驱动板20，在此过程中，触控屏30的响应时间为5～20ms，主芯片模块40的处理响应时间为40～60ms，信号驱动主板10的处理响应时间为20～30ms，显示屏50的响应时间为8～10ms，从而导致在当前书写位置书写结束之后，在显示屏50显示当前书写位置的书写轨迹的延迟时间为70～120ms。
即屏幕驱动板20接收到当前触控坐标时，该当前触控坐标的书写轨迹尚未叠加到屏幕图像中传输到屏幕驱动板20，亦即屏幕驱动板20当前所接收到的第一屏幕图像中的书写轨迹尚未包含当前触控坐标的书写轨迹，第一屏幕图像中的书写轨迹为当前触控坐标之前的历史触控坐标所形成的历史书写轨迹。
由于在书写操作过程中，相邻两帧屏幕图像之间背景图像不会发生变化，只有书写轨迹在变化，屏幕驱动板20可以从第一屏幕图像中确定出历史书写轨迹，从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，例如，将历史书写轨迹所包含的像素中与当前触控坐标对应的像素的距离最小的像素的颜色确定为书写颜色。
S404、驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以驱动显示屏显示当前触控坐标的书写轨迹。
在确定书写颜色之后，可以确定当前触控坐标在第一屏幕图像中对应的像素，在该像素显示书写颜色得到更新后的第一屏幕图像，以在第一屏幕图像中生成当前触控坐标的书写轨迹，屏幕驱动板对该第一屏幕图像的信号进行转换，以驱动液晶显示屏显示更新后的第一屏幕图像，进而快速地显示当前触控坐标的书写轨迹。
本申请实施例的屏幕驱动板从触控屏接收当前书写位置的当前触控坐标，以及从信号驱动主板接收第一屏幕图像，该第一屏幕图像为主芯片模块所生成的包含历史书写轨迹的图像，屏幕驱动板从历史书写轨迹所包含的像素的颜色中确定当前触控坐标的书写颜色，驱动显示屏显示第一屏幕图像，并在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以显示当前触控坐标的书写轨迹。由于屏幕驱动板可直接接收到当前书写位置的触控坐标，直接在包含历史书写轨迹的第一屏幕图像中确定出触控坐标的书写颜色，驱动显示屏在第一屏幕图像中触控坐标对应的像素显示书写颜色以显示书写轨迹，解决了通过主芯片模块将屏幕图像和触控坐标的轨迹合成后依次通过信号驱动主板、屏幕驱动板输出到显示屏显示所导致的书写轨迹显示延迟的问题，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
实施例四
图5为本申请实施例四提供的一种书写轨迹显示方法的流程图，本实施例在上述实施例三的基础上进行优化，如图5所示，该书写轨迹显示方法包括：
S501、从触控屏接收当前书写位置的当前触控坐标。
S502、从信号驱动主板接收第一屏幕图像，第一屏幕图像为主芯片模块所生成的包含历史书写轨迹的图像。
S503、在第一屏幕图像确定出与第二屏幕图像中像素位置相同、像素颜色不同的至少一个目标像素，第二屏幕图像为接收到第一屏幕图像之前所接收到的前一帧图像。
本实施例中，屏幕驱动板可以存储第二屏幕图像，该第二屏幕图像为接收到第一屏幕图像之前所接收到的前一帧图像，第一屏幕图像和第二屏幕图像均为主芯片模块所生成的包含历史书写轨迹的图像，即第一屏幕图像和第二屏幕图像为相邻帧屏幕图像，第二屏幕图像在第一屏幕图像之前。
屏幕驱动板在接收到第一屏幕图像时，可以在第一屏幕图像确定出与第二屏幕图像中像素位置相同、像素颜色不同的至少一个目标像素，如图2C和图2D所示，图2C为屏幕驱动板当前所接收到的第一屏幕图像，图2D为屏幕驱动板当前所接收到的第一屏幕图像之前的第二屏幕图像，第一屏幕图像和第二屏幕图像中均包括历史书写轨迹，在本示例中，用户可以在触控屏上单点触控，即一支书写笔进行书写操作，也可以是多点触控，即两支以上书写笔进行书写操作，本示例以两支书写笔进行书写操作为例，历史书写轨迹包括第一书写轨迹21和第二书写轨迹22，由于第二屏幕图像是屏幕驱动板接收到的第一屏幕图像的前一帧图像，即第一屏幕图像和第二屏幕图像为相邻的图像并且第二屏幕图像在第一屏幕图像之前，在书写操作过程中，相邻两帧屏幕图像之间只有书写轨迹在变化，背景图像1不会发生变化，则可以将第一屏幕图像和第二屏幕图像对比，具体是比对第一屏幕图像和第二屏幕图像中相同位置像素的像素颜色，以确定出不同像素颜色的像素作为目标像素，如图2C所示，第一书写轨迹21中的区域A所包含的像素以及第二书写轨迹22中的区域B所包含的像素为目标像素，这些目标像素是由于用户在图2D所示的第二屏幕图像之后继续书写操作所形成的书写轨迹。
S504、针对每个当前触控坐标，从至少一个目标像素中确定出像素坐标与当前触控坐标的像素坐标距离最小的像素。
每个目标像素具有像素坐标，对于每个触控坐标，确定该触控坐标匹配的像素坐标后，通过每个触控坐标匹配的像素坐标与目标像素的像素坐标计算距离，以在多个目标像素中确定出距离最小的像素。
如图2C中，有两支书写笔进行书写操作，屏幕驱动板接收到两个触控坐标，两个触控坐标在第一屏幕图像中对应的像素分别为像素P1和像素P2，像素P1与第一书写轨迹21中的像素A的距离最近，可以将像素A确定为与像素P1距离最近的像素，像素P2与第二书写轨迹22中的像素B的距离最近，可以将像素B确定为与像素P2距离最近的像素。
S505、将距离最小的像素的颜色确定为当前触控坐标的书写颜色。
像素P1与第一书写轨迹21中的像素A的距离最近，将像素A的颜色作为像素P1的书写颜色，从而显示书写轨迹，同理，像素P2与第二书写轨迹22中的像素B的距离最近，可以将像素B的颜色作为像素P2的书写颜色。
S506、驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示书写颜色。
将该距离最小的像素的颜色确定为当前触控坐标的书写颜色之后，直接驱动显示屏在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示该书写颜色，即得到当前触控坐标的书写轨迹。
本实施例屏幕驱动板从触控屏接收当前书写位置的当前触控坐标，以及从所述信号驱动主板接收第一屏幕图像后，通过缓存当前所接收到的第一屏幕图像之前的第二屏幕图像，在第一屏幕图像中查找出位置相同、颜色不同的目标像素以确定出历史书写轨迹，从而将目标像素的颜色确定为书写颜色，驱动显示屏在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示书写颜色，即得到当前触控坐标的书写轨迹，解决了通过主芯片模块将屏幕图像和触控坐标的轨迹合成后依次通过信号驱动主板、屏幕驱动板输出到显示屏显示所导致的书写轨迹显示延迟的问题，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
实施例五
图6为本申请实施例五提供的一种书写轨迹显示方法的流程图，本实施例在上述实施例三的基础上进行优化，如图6所示，该书写轨迹显示方法包括：
S601、从触控屏接收当前书写位置的当前触控坐标。
S602、从信号驱动主板接收第一屏幕图像，第一屏幕图像为主芯片模块所生成的包含历史书写轨迹的图像。
S603、从第一屏幕图像中确定出历史触控坐标对应的目标像素，历史触控坐标为接收到当前触控坐标之前的前一个触控坐标。
本实施例的屏幕驱动板可以存储历史触控坐标，例如存储当前触控坐标之前的一个历史触控坐标，即历史触控坐标和当前触控坐标为相邻的两个触控坐标，并且历史触控坐标对应的书写轨迹已经显示在第一屏幕图像中，可以从第一屏幕图像中确定出历史触控坐标对应的目标像素，具体地，可以在预先存储的校准数据中查找历史触控坐标对应的像素坐标，该像素坐标在第一屏幕图像中对应的像素即为目标像素。
S604、针对每个当前触控坐标，从目标像素中确定出像素坐标与当前触控坐标的像素坐标距离最小的像素。
书写操作可以是单点触控操作，还可以是多点触控操作，以图2C中有两支书写笔进行书写操作作为示例，对于每个当前触控坐标，同样可以从校准数据中查找当前触控坐标对应的像素坐标，计算当前触控坐标的像素坐标与目标像素的像素坐标之间的距离，从而得到与当前触控坐标的像素坐标距离最小的像 素。
如在图2C中，屏幕驱动板20接收到两个当前触控坐标，两个当前触控坐标在第一屏幕图像中对应的像素分别为像素P1和像素P2，像素P1与第一书写轨迹21中的历史触控坐标对应的像素A的距离最近，像素P2与第二书写轨迹22中的历史触控坐标对应的像素B的距离最近。
S605、将距离最小的像素的颜色确定为当前触控坐标的书写颜色。
由于在连续书写操作过程中，书写颜色通常不会改变，相邻或相近的像素的书写颜色相同，可以将与当前触控坐标的像素相邻或相近的像素的颜色作为书写颜色。
如在图2C中，有两支书写笔进行书写操作，屏幕驱动板20接收到两个当前触控坐标，两个当前触控坐标在第一屏幕图像中对应的像素分别为像素P1和像素P2，像素P1与第一书写轨迹21中的历史触控坐标对应的像素A的距离最近，可以将像素A的颜色作为像素P1的书写颜色，同理，像素P2与第二书写轨迹22中的历史触控坐标对应的像素B的距离最近，可以将像素B的颜色作为像素P2的书写颜色。
S606、驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示书写颜色。
在确定书写颜色之后，可以在第一屏幕图像中直接将当前触控坐标匹配的像素坐标对应的像素设置为该书写颜色，即得到当前触控坐标的书写轨迹。
本实施例屏幕驱动板从触控屏接收当前书写位置的当前触控坐标，以及从信号驱动主板接收第一屏幕图像后，从第一屏幕图像中确定出历史触控坐标对应的目标像素，历史触控坐标为接收到当前触控坐标之前的前一个触控坐标，在第一屏幕图像中确定出历史触控坐标对应的目标像素，从目标像素中确定出像素坐标与当前触控坐标的像素坐标距离最小的像素，将距离最小的像素的颜色确定为当前触控坐标的书写颜色，驱动显示屏在第一屏幕图像中当前触控坐标匹配的像素坐标对应的像素显示书写颜色，解决了通过主芯片模块将屏幕图像和触控坐标的轨迹合成后依次通过信号驱动主板、屏幕驱动板输出到显示屏显示所导致的书写轨迹显示延迟的问题，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
另外，通过缓存历史触控坐标，通过在第一屏幕图像中查找出历史触控坐标对应的目标像素，从而将目标像素的颜色确定为书写颜色，一方面，存储历史触控坐标数据量小，占用存储空间少，另一方面，通过触控坐标匹配目标像 素，效率高，能够快速确定出书写颜色，进一步缩小书写轨迹显示延迟。
实施例六
图7为本申请实施例六提供的一种书写轨迹显示方法的流程图，本实施例可适用于板卡驱动显示屏显示触控屏上的书写轨迹的情况，该方法可以由板卡来实现。如图7所示，该书写轨迹显示方法包括：
S701、接收当前触控坐标，当前触控坐标从与板卡连接的触控屏的当前书写位置获取。
如图3所示，本实施例的板卡包括信号驱动主板10、屏幕驱动板20以及主芯片模块40，屏幕驱动板20可以是TCON(Timer Control Register，定时器/计数器控制寄存器)，屏幕驱动板20的作用是把信号驱动主板10发送的屏幕图像信号进行处理后，转换成能驱动液晶显示屏的信号，以驱动液晶显示屏显示屏幕图像。屏幕驱动板20可以从与板卡100所连接的触控屏接收当前书写位置的当前触控坐标。
S702、获取第一屏幕图像，第一屏幕图像为包含历史书写轨迹的图像。
如图3所示，信号驱动主板10可以是将主芯片模块40输出的屏幕图像数字化后输出数字信号到屏幕驱动板20的模块，其中，主芯片模块40可以是交互平板上安装有操作系统的计算机模块，主芯片模块40上安装有书写应用程序，例如白板软件、绘图软件等，书写应用程序打开时可以在触控屏上进行书写操作。本实施例中，主芯片模块40从触控屏接收由书写操作所产生的触控坐标，并根据触控坐标生成书写轨迹，将书写轨迹叠加在主芯片模块40当前需要输出的图像中作为屏幕图像，并将该屏幕图像输出到信号驱动主板10，该信号驱动主板10将屏幕图像转换为数字信号后输出到屏幕驱动板20，获取第一屏幕图像可以是获取屏幕驱动板20从主芯片模块40所接收到的最新的屏幕图像，该第一屏幕图像为包含历史书写轨迹的图像。
S703、从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色。
如图1所示，在现有交互系统中，在主芯片模块40输出屏幕图像的过程中，当用户打开主芯片模块40上的白板软件并且在触控屏30上进行书写操作时，主芯片模块40接收到触控屏30输出的当前书写位置的触控坐标，主芯片模块40根据当前触控坐标生成书写轨迹，将该书写轨迹叠加到屏幕图像中，再通过信号驱动主板10将屏幕图像输出到屏幕驱动板20，在此过程中，触控屏30的响应时间为5～20ms，主芯片模块40的处理响应时间为40～60ms，信号驱动主板 10的处理响应时间为20～30ms，显示屏50的响应时间为8～10ms，从而导致在当前书写位置书写结束之后，在显示屏50显示当前书写位置的书写轨迹的延迟时间为70～120ms。
即屏幕驱动板20接收到当前触控坐标时，该当前触控坐标的书写轨迹尚未叠加到屏幕图像中传输到屏幕驱动板20，亦即屏幕驱动板20当前所接收到的第一屏幕图像中的书写轨迹尚未包含当前触控坐标的书写轨迹，第一屏幕图像中的书写轨迹为当前触控坐标之前的历史触控坐标所形成的历史书写轨迹。
由于在书写操作过程中，相邻两帧屏幕图像之间背景图像不会发生变化，只有书写轨迹在变化，屏幕驱动板20可以从第一屏幕图像中确定出历史书写轨迹，从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，例如，将历史书写轨迹所包含的像素中与当前触控坐标对应的像素的距离最小的像素的颜色确定为书写颜色。
S704、驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以驱动显示屏显示当前触控坐标的书写轨迹。
在确定书写颜色之后，可以确定当前触控坐标在第一屏幕图像中对应的像素，在该像素显示书写颜色得到更新后的第一屏幕图像，以在第一屏幕图像中生成当前触控坐标的书写轨迹，屏幕驱动板对该第一屏幕图像的信号进行转换，以驱动液晶显示屏显示更新后的第一屏幕图像，进而快速地显示当前触控坐标的书写轨迹。
本申请实施例的板卡可以从触控屏接收当前书写位置的当前触控坐标，以及获取第一屏幕图像，该第一屏幕图像为包含历史书写轨迹的图像，进一步从历史书写轨迹所包含的像素的颜色中确定当前触控坐标的书写颜色，驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以驱动显示屏显示当前触控坐标的书写轨迹。由于板卡可直接接收到当前书写位置的触控坐标，直接在包含历史书写轨迹的第一屏幕图像中确定出触控坐标的书写颜色，驱动显示屏在第一屏幕图像中触控坐标对应的像素显示书写颜色以显示书写轨迹，解决了通过主芯片模块将屏幕图像和触控坐标的轨迹合成后依次通过信号驱动主板、屏幕驱动板输出到显示屏显示所导致的书写轨迹显示延迟的问题，缩短了书写轨迹显示延迟，实现了书写操作和显示的同步。
实施例七
图8为本申请实施例七提供的一种显示模组的拓扑结构示意图。如图8所示，该显示模组200包括显示屏50和屏幕驱动板20，显示屏50和屏幕驱动板20连接，屏幕驱动板20用于接收当前触控坐标，以及从信号驱动主板接收第一屏幕图像，其中，当前触控坐标从与显示模组200连接的触控屏的当前书写位置获取，第一屏幕图像为与显示模组200连接的信号驱动主板所接收到的、包含历史书写轨迹的图像，并从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，驱动显示屏显示第一屏幕图像，并驱动显示屏在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以驱动显示屏显示当前触控坐标的书写轨迹。
具体地，屏幕驱动板20可以设置有触控信号接口202和驱屏信号接口201，其中，触控信号接口202可以与触控屏连接，以从与显示模组200连接的触控屏接收当前书写位置的当前触控坐标，驱屏信号接口202可与信号驱动主板连接，以从与显示模组200连接的信号驱动主板接收屏幕图像，该屏幕图像可以是与显示模组200连接的信号驱动主板所接收到的、包含历史书写轨迹的图像，屏幕驱动板20还用于驱动显示屏50显示屏幕图像。
本实施例的显示模组200显示书写轨迹的原理可参考实施例一的交互系统，在此不再详述。
本实施例的显示模组200中，屏幕驱动板20接收到触控屏发送的当前书写位置的当前触控坐标后，由于包含当前书写位置的书写轨迹的屏幕图像存在延迟，尚未通过信号驱动主板传输到屏幕驱动板20，屏幕驱动板20可以从当前所接收到的、包含历史书写轨迹的第一屏幕图像中确定出当前触控坐标的书写颜色，该屏幕图像所包含的历史书写轨迹不包含当前触控坐标的书写轨迹，屏幕驱动板20可以驱动显示屏50在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，无需等待当前书写位置的触控坐标输出到主芯片模块，在主芯片模块中生成书写轨迹叠加到屏幕图像之后，再通过信号驱动主板来输出到屏幕驱动板20，减少了主芯片模块的处理响应时间(40～60ms)、信号驱动主板的处理响应时间(20～30ms)，可以将书写轨迹显示延迟减少了60-90ms，从而使得书写轨迹显示延迟从70-120ms降低到10-30ms，实现了屏幕驱动板20接收到当前书写位置的当前触控坐标即显示对应的书写轨迹，缩短了显示模组200的书写轨迹显示延迟，实现了在显示模组200上书写操作和显示的同步。
实施例八
图9为本申请实施例八提供的一种智能交互平板的拓扑结构示意图。如图9 所示，本实施例的智能交互平板300包括显示屏50、屏幕驱动板20和触控屏30，屏幕驱动板20分别与显示屏50和触控屏30连接。
在本实施例中，触控屏30可以是智能交互平板中与显示屏50一体化的触控屏，触控屏30可以是红外式触控屏、电磁式触控屏、电容式触控屏、电阻式触控屏、压感式触控屏中的一种，当用户在触控屏30上进行书写操作时，触控屏30可以按照预设的采样率输出当前书写位置的当前触控坐标，并将该当前触控坐标通过触控信号接口输出到屏幕驱动板20，屏幕驱动板20接收当前触控坐标，屏幕驱动板20还从信号驱动主板接收第一屏幕图像，第一屏幕图像为与智能交互平板300连接的信号驱动主板所接收到的、包含历史书写轨迹的图像，从历史书写轨迹所包含的像素的颜色中确定出当前触控坐标的书写颜色，驱动显示屏显示第一屏幕图像，并在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以显示当前触控坐标的书写轨迹。
本实施例的智能交互平板显示书写轨迹的原理可参考实施例一的交互系统，在此不再详述。
本实施例的智能交互平板中，屏幕驱动板20接收到触控屏30发送的当前书写位置的当前触控坐标后，由于包含当前书写位置的书写轨迹的屏幕图像存在延迟，尚未通过信号驱动主板传输到屏幕驱动板20，屏幕驱动板20可以从当前所接收到的、包含历史书写轨迹的第一屏幕图像中确定出当前触控坐标的书写颜色，该屏幕图像所包含的历史书写轨迹不包含当前触控坐标的书写轨迹，屏幕驱动板20驱动显示屏50在第一屏幕图像中当前触控坐标对应的像素显示书写颜色，以在所接收到的第一屏幕图像显示当前触控坐标的书写轨迹，无需等待当前书写位置的触控坐标输出到主芯片模块，在主芯片模块中生成书写轨迹叠加到屏幕图像之后，再通过信号驱动主板来输出到屏幕驱动板20，减少了主芯片模块的处理响应时间(40～60ms)、信号驱动主板的处理响应时间(20～30ms)，可以将书写轨迹显示延迟减少了60-90ms，从而使得书写轨迹显示延迟从70-120ms降低到10-30ms，实现了屏幕驱动板20接收到当前书写位置的当前触控坐标即驱动显示屏50显示对应的书写轨迹，缩短了智能交互平板的书写轨迹显示延迟，实现了在智能交互平板上书写操作和显示的同步。
实施例九
图10示出了可以用来实施本申请的实施例的智能交互平板的结构示意图。如图10所示，智能交互平板包括至少一个处理器71，以及与至少一个处理器71通信连接的存储器，如只读存储器(ROM)72、随机访问存储器(RAM)73 等，其中，存储器存储有可被至少一个处理器执行的计算机程序，处理器71可以根据存储在只读存储器(ROM)72中的计算机程序或者从存储单元78加载到随机访问存储器(RAM)73中的计算机程序，来执行各种适当的动作和处理。在RAM 73中，还可存储智能交互平板操作所需的各种程序和数据。处理器71、ROM 72以及RAM 73通过总线74彼此相连。输入/输出(I/O)接口75也连接至总线74。
智能交互平板中的多个部件连接至I/O接口75，包括：输入单元76，例如键盘、鼠标、触控屏等；输出单元77，例如各种类型的显示器、扬声器等；存储单元78，例如磁盘、光盘等；以及通信单元79，例如网卡、调制解调器、无线通信收发机等。通信单元79允许智能交互平板通过诸如因特网的计算机网络和/或各种电信网络与其他设备交换信息/数据。
处理器71可以是各种具有处理和计算能力的通用和/或专用处理组件。处理器71的一些示例包括但不限于中央处理单元(CPU)、图形处理单元(GPU)、各种专用的人工智能(AI)计算芯片、各种运行机器学习模型算法的处理器、数字信号处理器(DSP)、以及任何适当的处理器、控制器、微控制器等。处理器71执行上文所描述的各个方法和处理，例如书写轨迹显示方法。
在一些实施例中，书写轨迹显示方法可被实现为计算机程序，其被有形地包含于计算机可读存储介质，例如存储单元78。在一些实施例中，计算机程序的部分或者全部可以经由ROM 72和/或通信单元79而被载入和/或安装到智能交互平板上。当计算机程序加载到RAM 73并由处理器71执行时，可以执行上文描述的书写轨迹显示方法的一个或多个步骤。备选地，在其他实施例中，处理器71可以通过其他任何适当的方式(例如，借助于固件)而被配置为执行书写轨迹显示方法。
本文中以上描述的系统和技术的各种实施方式可以在数字电子电路系统、集成电路系统、场可编程门阵列(FPGA)、专用集成电路(ASIC)、专用标准产品(ASSP)、芯片上系统的系统(SOC)、负载可编程逻辑设备(CPLD)、计算机硬件、固件、软件、和/或它们的组合中实现。这些各种实施方式可以包括：实施在一个或者多个计算机程序中，该一个或者多个计算机程序可在包括至少一个可编程处理器的可编程系统上执行和/或解释，该可编程处理器可以是专用或者通用可编程处理器，可以从存储系统、至少一个输入装置、和至少一个输出装置接收数据和指令，并且将数据和指令传输至该存储系统、该至少一个输入装置、和该至少一个输出装置。
用于实施本申请的方法的计算机程序可以采用一个或多个编程语言的任何组合来编写。这些计算机程序可以提供给通用计算机、专用计算机或其他可编程数据处理装置的处理器，使得计算机程序当由处理器执行时使流程图和/或框图中所规定的功能/操作被实施。计算机程序可以完全在机器上执行、部分地在机器上执行，作为独立软件包部分地在机器上执行且部分地在远程机器上执行或完全在远程机器或服务器上执行。
在本申请的上下文中，计算机可读存储介质可以是有形的介质，其可以包含或存储以供指令执行系统、装置或设备使用或与指令执行系统、装置或设备结合地使用的计算机程序。计算机可读存储介质可以包括但不限于电子的、磁性的、光学的、电磁的、红外的、或半导体系统、装置或设备，或者上述内容的任何合适组合。备选地，计算机可读存储介质可以是机器可读信号介质。机器可读存储介质的更具体示例会包括基于一个或多个线的电气连接、便携式计算机盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦除可编程只读存储器(EPROM或快闪存储器)、光纤、便捷式紧凑盘只读存储器(CD-ROM)、光学储存设备、磁储存设备、或上述内容的任何合适组合。
为了提供与用户的交互，可以在智能交互平板上实施此处描述的系统和技术，该智能交互平板具有：用于向用户显示信息的显示装置(例如，CRT(阴极射线管)或者LCD(液晶显示器)监视器)；以及键盘、指向装置(例如，鼠标或者轨迹球)以及触控屏，用户可以通过该键盘、该指向装置以及触控屏来将输入提供给智能交互平板。其它种类的装置还可以用于提供与用户的交互；例如，提供给用户的反馈可以是任何形式的传感反馈(例如，视觉反馈、听觉反馈、或者触觉反馈)；并且可以用任何形式(包括声输入、语音输入或者、触觉输入)来接收来自用户的输入。
应该理解，可以使用上面所示的各种形式的流程，重新排序、增加或删除步骤。例如，本申请中记载的各步骤可以并行地执行也可以顺序地执行也可以不同的次序执行，只要能够实现本申请的技术方案所期望的结果，本文在此不进行限制。
上述具体实施方式，并不构成对本申请保护范围的限制。本领域技术人员应该明白的是，根据设计要求和其他因素，可以进行各种修改、组合、子组合和替代。任何在本申请的精神和原则之内所作的修改、等同替换和改进等，均应包含在本申请保护范围之内。

Claims (16)

  1. 一种交互系统，其特征在于，包括信号驱动主板、屏幕驱动板、触控屏和主芯片模块，所述主芯片模块分别与所述信号驱动主板和所述触控屏连接，所述屏幕驱动板分别与所述触控屏和所述信号驱动主板连接；
    所述触控屏用于生成当前书写位置的当前触控坐标；
    所述主芯片模块用于从所述触控屏接收到所述当前触控坐标时，生成屏幕图像并发送到所述信号驱动主板；
    所述屏幕驱动板用于：
    从所述触控屏接收当前书写位置的当前触控坐标；
    从所述信号驱动主板接收第一屏幕图像，所述第一屏幕图像为所述信号驱动主板所接收到的包含历史书写轨迹的图像；
    从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
    驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
  2. 如权利要求1所述的交互系统，其特征在于，所述屏幕驱动板设置有触控信号接口和驱屏信号接口；
    所述触控信号接口用于从所述触控屏接收两个以上当前书写位置的当前触控坐标信息；
    所述驱屏信号接口用于从所述信号驱动主板接收所述第一屏幕图像。
  3. 如权利要求1所述的交互系统，其特征在于，还包括：
    存储器，所述存储器与所述屏幕驱动板连接，所述存储器用于存储校准数据，所述校准数据包括每个触控坐标匹配的像素坐标；
    所述屏幕驱动板还用于在所述校准数据中查找所述当前触控坐标匹配的像素坐标。
  4. 如权利要求1-3任一项所述的交互系统，其特征在于，所述当前触控坐标为一个以上，所述当前触控坐标具有匹配的像素坐标；
    所述屏幕驱动板还用于：
    在所述第一屏幕图像确定出与第二屏幕图像中像素位置相同、像素颜色不同的至少一个目标像素，所述第二屏幕图像为接收到所述第一屏幕图像之前所接收到的前一帧图像；
    针对每个所述当前触控坐标，从所述至少一个目标像素中确定出像素坐标与所述当前触控坐标的像素坐标距离最小的像素；
    将所述距离最小的像素的颜色确定为所述当前触控坐标的书写颜色；
    驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标匹配的像素坐标对应的像素显示所述书写颜色。
  5. 如权利要求1-3任一项所述的交互系统，其特征在于，所述当前触控坐标为一个以上，所述当前触控坐标具有匹配的像素坐标；
    所述屏幕驱动板还用于：
    从所述第一屏幕图像中确定出历史触控坐标对应的目标像素，所述历史触控坐标为接收到所述当前触控坐标之前的前一个触控坐标；
    针对每个所述当前触控坐标，从所述目标像素中确定出像素坐标与所述当前触控坐标的像素坐标距离最小的像素；
    将所述距离最小的像素的颜色确定为所述当前触控坐标的书写颜色；
    驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标匹配的像素坐标对应的像素显示所述书写颜色。
  6. 一种板卡，其特征在于，包括信号驱动主板、屏幕驱动板和主芯片模块，所述信号驱动主板分别与所述屏幕驱动板和所述主芯片模块连接；
    所述主芯片模块用于接收当前触控坐标，并生成屏幕图像发送到所述信号驱动主板，其中所述当前触控坐标从与所述板卡连接的触控屏的当前书写位置获取；
    所述屏幕驱动板用于：
    接收所述当前触控坐标，以及
    从所述信号驱动主板接收第一屏幕图像，所述第一屏幕图像为所述信号驱动主板所接收到的包含历史书写轨迹的图像；
    从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
    驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
  7. 一种书写轨迹显示方法，其特征在于，应用于如权利要求1-5任一项所述的交互系统，包括：
    从触控屏接收当前书写位置的当前触控坐标；
    从信号驱动主板接收第一屏幕图像，所述第一屏幕图像为主芯片模块所生成的包含历史书写轨迹的图像；
    从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
    驱动显示屏显示所述第一屏幕图像，并在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以显示所述当前触控坐标的书写轨迹。
  8. 如权利要求7所述的书写轨迹显示方法，其特征在于，所述从触控屏接收当前书写位置的当前触控坐标，包括：
    从所述触控屏接收两个以上的当前书写位置的当前触控坐标信息。
  9. 如权利要求7所述的书写轨迹显示方法，其特征在于，在从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色之前，还包括：
    在预先存储的校准数据中查找所述当前触控坐标匹配的像素坐标。
  10. 如权利要求7-9任一项所述的书写轨迹显示方法，其特征在于，所述当前触控坐标为一个以上，所述当前触控坐标具有匹配的像素坐标，所述从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色，包括：
    在所述第一屏幕图像确定出与第二屏幕图像中像素位置相同、像素颜色不同的至少一个目标像素，所述第二屏幕图像为接收到所述第一屏幕图像之前所接收到的前一帧图像；
    针对每个所述当前触控坐标，从所述至少一个目标像素中确定出像素坐标与所述当前触控坐标的像素坐标距离最小的像素；
    将所述距离最小的像素的颜色确定为所述当前触控坐标的书写颜色；
    所述在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，包括：
    在所述第一屏幕图像中所述当前触控坐标匹配的像素坐标对应的像素显示所述书写颜色。
  11. 如权利要求7-9任一项所述的书写轨迹显示方法，其特征在于，所述当前触控坐标为一个以上，所述当前触控坐标具有匹配的像素坐标，所述从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色，包 括：
    从所述第一屏幕图像中确定出历史触控坐标对应的目标像素，所述历史触控坐标为接收到所述当前触控坐标之前的前一个触控坐标；
    针对每个所述当前触控坐标，从所述目标像素中确定出像素坐标与所述当前触控坐标的像素坐标距离最小的像素；
    将所述距离最小的像素的颜色确定为所述当前触控坐标的书写颜色；
    所述在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，包括：
    在所述第一屏幕图像中所述当前触控坐标匹配的像素坐标对应的像素显示所述书写颜色。
  12. 一种书写轨迹显示方法，其特征在于，应用于权利要求6所述的板卡，包括：
    接收当前触控坐标，所述当前触控坐标从与所述板卡连接的触控屏的当前书写位置获取；
    获取第一屏幕图像，所述第一屏幕图像为包含历史书写轨迹的图像；
    从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
    驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以驱动所述显示屏显示所述当前触控坐标的书写轨迹。
  13. 一种显示模组，其特征在于，包括显示屏和屏幕驱动板，所述显示屏和所述屏幕驱动板连接，所述屏幕驱动板用于：
    接收当前触控坐标，所述当前触控坐标从与所述显示模组连接的触控屏的 当前书写位置获取；
    接收第一屏幕图像，所述第一屏幕图像为与所述显示模组连接的信号驱动主板所接收到的、包含历史书写轨迹的图像；
    从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
    驱动显示屏显示所述第一屏幕图像，并驱动所述显示屏在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以显示所述当前触控坐标的书写轨迹。
  14. 一种智能交互平板，其特征在于，包括显示屏、屏幕驱动板和触控屏，所述屏幕驱动板分别与所述显示屏和所述触控屏连接；
    所述屏幕驱动板用于：
    接收当前触控坐标，所述当前触控坐标从所述触控屏的当前书写位置获取；
    接收第一屏幕图像，所述第一屏幕图像为与所述智能交互平板连接的信号驱动主板所接收到的、包含历史书写轨迹的图像；
    从所述历史书写轨迹所包含的像素的颜色中确定出所述当前触控坐标的书写颜色；
    驱动显示屏显示所述第一屏幕图像，并在所述第一屏幕图像中所述当前触控坐标对应的像素显示所述书写颜色，以显示所述当前触控坐标的书写轨迹。
  15. 一种智能交互平板，其特征在于，所述智能交互平板包括：
    至少一个处理器；以及
    与所述至少一个处理器通信连接的存储器；其中，
    所述存储器存储有可被所述至少一个处理器执行的计算机程序，所述计算机程序被所述至少一个处理器执行，以使所述至少一个处理器能够执行权利要 求7-11中任一项所述的书写轨迹显示方法。
  16. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机指令，所述计算机指令用于使处理器执行时实现权利要求7-11中任一项所述的书写轨迹显示方法。
PCT/CN2022/119601 2022-09-19 2022-09-19 交互系统、板卡、书写轨迹显示方法、平板和存储介质 WO2024059967A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016075976A (ja) * 2014-10-02 2016-05-12 株式会社リコー 画像処理装置、画像処理方法、画像通信システム、及びプログラム
CN108628531A (zh) * 2018-04-19 2018-10-09 广州视源电子科技股份有限公司 取色书写的方法、装置、电子设备、存储介质及智能笔
CN109032494A (zh) * 2018-08-15 2018-12-18 广州视源电子科技股份有限公司 智能交互系统、书写轨迹显示方法、装置、平板及介质
US20200278768A1 (en) * 2017-09-26 2020-09-03 Samsung Electronics Co., Ltd. Electronic blackboard and control method thereof
CN112783346A (zh) * 2021-01-19 2021-05-11 深圳市皓丽智能科技有限公司 一种笔迹数据处理方法、系统、计算机设备及存储介质
CN113168254A (zh) * 2018-12-25 2021-07-23 深圳市柔宇科技股份有限公司 续笔方法与显示终端

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016075976A (ja) * 2014-10-02 2016-05-12 株式会社リコー 画像処理装置、画像処理方法、画像通信システム、及びプログラム
US20200278768A1 (en) * 2017-09-26 2020-09-03 Samsung Electronics Co., Ltd. Electronic blackboard and control method thereof
CN108628531A (zh) * 2018-04-19 2018-10-09 广州视源电子科技股份有限公司 取色书写的方法、装置、电子设备、存储介质及智能笔
CN109032494A (zh) * 2018-08-15 2018-12-18 广州视源电子科技股份有限公司 智能交互系统、书写轨迹显示方法、装置、平板及介质
CN113168254A (zh) * 2018-12-25 2021-07-23 深圳市柔宇科技股份有限公司 续笔方法与显示终端
CN112783346A (zh) * 2021-01-19 2021-05-11 深圳市皓丽智能科技有限公司 一种笔迹数据处理方法、系统、计算机设备及存储介质

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