CN113867677A - Display system and refreshing method of electronic ink display screen - Google Patents

Display system and refreshing method of electronic ink display screen Download PDF

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Publication number
CN113867677A
CN113867677A CN202111145392.7A CN202111145392A CN113867677A CN 113867677 A CN113867677 A CN 113867677A CN 202111145392 A CN202111145392 A CN 202111145392A CN 113867677 A CN113867677 A CN 113867677A
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frame
electronic ink
frames
display screen
current
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陈锐
龚元宏
龚东
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Beijing Dasung Tech Co ltd
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Beijing Dasung Tech Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/451—Execution arrangements for user interfaces
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The embodiment of the disclosure provides a display system and a refreshing method of an electronic ink display screen, wherein the display system comprises: the video streaming processing device samples an input video stream to obtain a plurality of frames which are sequentially arranged, stores the frames into the image buffer according to an arrangement sequence, and respectively stores at least two frames into the two frame buffers from the image buffer according to the arrangement sequence, and the video streaming processing device respectively reads a current frame displayed by the electronic ink display screen and a next frame of the current frame from the two frame buffers to compare a difference between the next frame of the current frame and the current frame, and refreshes the electronic ink display screen based on the difference, so that the display and memory scheduling efficiency can be optimized.

Description

Display system and refreshing method of electronic ink display screen
Technical Field
The disclosed embodiments relate to a display system and a method for refreshing an electronic ink display screen.
Background
Display technologies of a computer monitor (i.e., a desktop computer monitor or a notebook computer monitor) in the related art are mostly based on CRT (cathode ray tube technology), LCD (liquid crystal display technology), and LED (light emitting diode technology). In these displays, whether the electron gun shoots a fluorescent coating, or a built-in lamp tube, or a light emitting diode is self-emitting, the display based on the above technology is likely to damage the retina for a user gazing at the computer display for a long time. In addition, the generally low screen resolution of the computer monitor in the prior art also easily causes eye focus fatigue, thereby causing overall eye fatigue of the computer user, and even serious and ill-conditioned people.
Electronic ink Display (EPD) is a new technology that displays information by ambient light. The EPD display technology is to encapsulate black and white charged particles (ink droplets) in a microcapsule structure, and to control the lifting and lowering movement of the black and white particles with different charges by an external electric field to display the black-white monochromatic display effect. When the electrodes are exchanged, the two color particles exchange positions, so that the white particles go to the lower side and the black particles go to the upper side, and light is totally absorbed by the black particles, thereby resulting in black and white display. In addition, the upper surface can be in a mixed state, and two different particles are mixed in proportion, so that different colors with black and gray levels can be formed.
Because the EPD technology can present a black-and-white display effect with high reflectivity and high contrast, and simultaneously has a memory effect, when the external electric field is cancelled, the currently presented display is displayed in real time, like the content displayed by a piece of printed paper. Due to bistability, the image remains on the EPD display screen for months or years after the power supply field is removed. The technology can realize reflective display by means of ambient light, and is similar to the printing display effect of common paper. Therefore, compared with traditional self-luminous display screens such as CRT, LED, LCD, OLED and the like, the EPD display screen is not easy to fatigue eyes, and the retina cannot be damaged by long-time staring. In addition, the EPD display screen also has the advantages of low power consumption, energy conservation and power conservation. Currently, EPD technology is always applied to handheld electronic reader devices such as electronic books.
EPD displays have been widely used in small-sized electronic devices such as electronic books, shelf labels, and the like. Also, display systems currently exist such as computer displays based on EPD display screens that can play back continuous pictures. However, when attempting to play a video stream (e.g., streaming media acquired from the internet) using a display system based on an EPD display screen according to the related art, it is difficult to display the video stream on the EPD display screen more smoothly due to limitations in processing methods of the video stream, transmission and storage methods of processed data, refresh methods of the EPD display screen, and the like. In particular, the prior art display system architecture and display memory scheduling techniques limit the overall efficiency of an EPD display screen to display a video stream.
Disclosure of Invention
The embodiment of the disclosure optimizes a display system structure and a display memory scheduling technology, and based on a frame buffer mode of a double-frame buffer, two adjacent image frames extracted from a video stream are rapidly scheduled and compared to obtain a difference to refresh an electronic ink display screen, so that the defects of an EPD display screen based on the prior art when the display displays the video stream are overcome.
In a first aspect, an embodiment of the present disclosure provides a display system, including:
a video stream processing device, an image buffer, two frame buffers and an electronic ink display screen,
wherein the content of the first and second substances,
the video stream processing apparatus samples an input video stream to obtain a plurality of frames arranged in order, stores the plurality of frames in the image buffer in the arrangement order, and stores at least two frames from the image buffer in the two frame buffers respectively in the arrangement order,
the video stream processing device respectively reads the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers to compare the difference between the next frame of the current frame and the current frame, and refreshes the electronic ink display screen based on the difference.
With reference to the first aspect, in a first implementation manner of the first aspect, the two frame buffers are respectively an odd frame buffer in which odd frames of the multiple frames are sequentially stored and an even frame buffer in which even frames of the multiple frames are sequentially stored.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the two frame buffers each store only one frame.
With reference to the first aspect, the first implementation manner, or the second implementation manner of the first aspect, in a third implementation manner of the first aspect, the video stream processing apparatus includes:
an image frame sampling module for sampling an input video stream to obtain a plurality of frames arranged in sequence, and storing the plurality of frames in the image buffer in the arrangement sequence, and storing at least two frames from the image buffer in the two frame buffers, respectively, in the arrangement sequence;
an operation data module for reading the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers respectively, comparing the difference between the next frame of the current frame and the current frame, and providing operation data based on the difference;
a gate/source driver for generating gate/source drive signals from the operational data to refresh the electronic ink display screen based on the difference.
In a second aspect, an embodiment of the present disclosure provides a method for refreshing an electronic ink display screen, including:
sampling an input video stream to obtain a plurality of frames arranged in sequence;
storing the plurality of frames in the image buffer in an order of arrangement;
storing at least two frames from the image buffer into the two frame buffers according to the arrangement sequence;
respectively reading a current frame displayed by an electronic ink display screen and a next frame of the current frame from the two frame buffers to compare the difference between the next frame of the current frame and the current frame;
refreshing the electronic ink display screen based on the difference.
With reference to the second aspect, in a first implementation manner of the second aspect, the storing at least two frames from the image buffer to the two frame buffers according to the arrangement order includes:
storing odd frames of the plurality of frames to an odd frame buffer and storing even frames of the plurality of frames to an even frame buffer in the order of the permutation.
With reference to the first implementation manner of the second aspect, in a second implementation manner of the second aspect, the reading a current frame displayed on an electronic ink display screen and a next frame of the current frame from the two frame buffers respectively to compare a difference between the next frame of the current frame and the current frame includes:
reading a current odd frame which is a current frame displayed by the electronic ink display screen or a current odd frame which is a next frame of the current frame from the odd frame buffer, and reading the current frame displayed by the electronic ink display screen or the current even frame which is the next frame of the current frame from the even frame buffer so as to compare the difference between the next frame of the current frame and the current frame.
With reference to the second implementation manner of the second aspect, in a third implementation manner of the second aspect, the refreshing the electronic ink display screen based on the difference includes:
refreshing the electronic ink display screen based on the difference to display a current even frame according to the fact that the current frame displayed by the electronic ink display screen is the current odd frame; or refreshing the electronic ink display screen based on the difference to display the current odd frame according to the fact that the current frame displayed by the electronic ink display screen is the current even frame.
With reference to the second aspect, or any one of the first implementation manner to the third implementation manner of the second aspect, in a fourth implementation manner of the second aspect, the present disclosure further includes:
and in response to the completion of the refreshing of the electronic ink display screen, deleting frames which are not displayed any more after refreshing from one of the two frame buffers.
With reference to the second aspect and any one of the first to third implementation manners of the second aspect, in a fifth implementation manner of the second aspect, data of one pixel in one frame is stored as one unit in the odd frame buffer and the even frame buffer.
The beneficial effects of the embodiment of the disclosure are: according to the display system of the embodiment of the disclosure, through a video stream processing device, an image buffer, two frame buffers and an electronic ink display screen, wherein the video stream processing device samples an input video stream to obtain a plurality of frames arranged in sequence, stores the plurality of frames into the image buffer according to the arrangement sequence, and stores at least two frames into the two frame buffers from the image buffer according to the arrangement sequence, the video stream processing device reads a current frame displayed by the electronic ink display screen and a next frame of the current frame from the two frame buffers respectively to compare a difference between the next frame of the current frame and the current frame, and refreshes the electronic ink display screen based on the difference, a migration process of data required by the electronic ink display screen for displaying in a display memory can be reduced based on optimization of a display memory structure and improvement of a working mode, and optimizing the video memory scheduling efficiency. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the previous frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
According to the embodiment of the disclosure, the two frame buffers are respectively an odd frame buffer for sequentially storing odd frames in the plurality of frames and an even frame buffer for sequentially storing even frames in the plurality of frames, so that the video memory structure can be optimized to include the odd frame buffer and the even frame buffer, the migration process of data required by the display of the electronic ink display screen in the video memory is reduced through the improvement of the working mode, the scheduling efficiency of the video memory is optimized, and the overall efficiency of the display system based on the electronic ink technology from the receiving of the video stream to the display can be improved.
According to the embodiment of the disclosure, two frame buffers used by the display system can be minimized by storing only one frame in each of the two frame buffers, thereby reducing the cost of the display system. And the migration process of data required by the electronic ink display screen in the video memory is reduced through the improvement of the working mode, and the scheduling efficiency of the video memory is optimized. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system.
According to an embodiment of the present disclosure, by the video stream processing apparatus, comprising: an image frame sampling module for sampling an input video stream to obtain a plurality of frames arranged in sequence, and storing the plurality of frames in the image buffer in the arrangement sequence, and storing at least two frames from the image buffer in the two frame buffers, respectively, in the arrangement sequence; an operation data module for reading the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers respectively, comparing the difference between the next frame of the current frame and the current frame, and providing operation data based on the difference; and the gating/source driver is used for generating a gating/source driving signal according to the operation data so as to refresh the electronic ink display screen based on the difference, and can reduce the migration process of data required by the electronic ink display screen for displaying in the display memory based on the optimization of the display memory structure and the improvement of the working mode and optimize the scheduling efficiency of the display memory. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the previous frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
According to an embodiment of the present disclosure, a plurality of frames arranged in sequence are obtained by sampling an input video stream; storing the plurality of frames in the image buffer in an order of arrangement; storing at least two frames from the image buffer into the two frame buffers according to the arrangement sequence; respectively reading a current frame displayed by an electronic ink display screen and a next frame of the current frame from the two frame buffers to compare the difference between the next frame of the current frame and the current frame; the electronic ink display screen is refreshed based on the difference, the migration process of data required by the electronic ink display screen to display in the display memory can be reduced based on the optimization of the display memory structure and the improvement of the working mode, and the display memory scheduling efficiency is optimized. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the previous frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
According to an embodiment of the present disclosure, storing at least two frames from the image buffer into the two frame buffers according to the arrangement order, respectively, includes: according to the arrangement sequence, the odd frames in the plurality of frames are stored in the odd frame buffer, and the even frames in the plurality of frames are stored in the even frame buffer, so that the video memory structure can be optimized to comprise the odd frame buffer and the even frame buffer, the migration process of data required by the display of the electronic ink display screen in the video memory is reduced through the improvement of the working mode, and the scheduling efficiency of the video memory is optimized. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system.
According to an embodiment of the present disclosure, the reading the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers respectively to compare the difference between the next frame of the current frame and the current frame includes: reading a current frame displayed by the electronic ink display screen or a current odd frame used as a next frame of the current frame from the odd frame buffer, reading the current frame displayed by the electronic ink display screen or a current even frame used as the next frame of the current frame from the even frame buffer, comparing the difference between the next frame of the current frame and the current frame, optimizing the video memory structure to include the odd frame buffer and the even frame buffer, reducing the migration process of data required by the electronic ink display screen in the video memory through the improvement of the working mode, and optimizing the video memory scheduling efficiency. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the next frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
According to an embodiment of the present disclosure, refreshing the electronic ink display screen based on the difference by the refreshing includes: refreshing the electronic ink display screen based on the difference to display a current even frame according to the fact that the current frame displayed by the electronic ink display screen is the current odd frame; or according to the fact that the current frame displayed by the electronic ink display screen is the current even frame, the electronic ink display screen is refreshed based on the difference to display the current odd frame, the electronic ink display screen can be refreshed based on the frame difference, and therefore the state of the pixels in the electronic ink display screen is changed as few as possible, so that the refreshing efficiency can be improved, and the display effect is optimized.
According to the embodiment of the disclosure, by responding to the completion of the refreshing of the electronic ink display screen and deleting the frames which are not displayed any more after the refreshing from one of the two frame buffers, the migration process of the data required by the electronic ink display screen to display in the video memory can be reduced based on the optimization of the video memory structure and the improvement of the working mode, and the video memory scheduling efficiency is optimized.
According to the embodiment of the disclosure, data of one pixel in one frame is stored in the odd frame buffer and the even frame buffer as a unit, the difference between the current frame and the next frame of the current frame respectively stored in the two buffers can be compared by taking the pixel as a unit to obtain the difference of the frames, and then the electronic ink display screen is refreshed based on the pixel level difference of the frames, so that the state of the pixels in the electronic ink display screen is changed as few as possible, the refreshing efficiency can be improved, and the display effect is optimized.
Drawings
Fig. 1 is a block diagram of a schematic structure of a display system based on an electronic ink technology according to the related art.
Fig. 2 is a block diagram of a schematic structure of an electronic ink technology based display system according to a specific embodiment of the present disclosure.
FIG. 3 is a flow chart of a method for refreshing an electronic ink display according to an embodiment of the present disclosure.
FIG. 4 is a block diagram of a schematic structure of an electronic device according to a specific implementation of an embodiment of the disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the embodiments of the present disclosure are described in further detail below with reference to the accompanying drawings in conjunction with the detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the embodiments of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the embodiments of the present disclosure.
Fig. 1 is a block diagram of a schematic structure of a display system based on an electronic ink technology according to the related art.
As shown in fig. 1, the related art electronic ink technology-based display system includes a micro control circuit 101, a timing controller 102, a display memory 103, and an electronic ink display screen 104. The micro control circuit 101 receives a picture signal and supplies the picture signal to the timing controller 102. Also, the micro control circuit 101 may provide a video screen refresh mode to the timing controller 102. In the related art, the picture signal received by the micro control circuit 101 is not a video stream signal but a picture signal subjected to video image conversion. For example, in the related art, the display system may further include a video image conversion device (not shown in fig. 1) that receives a video signal such as a video stream from the outside, converts the video signal into a picture signal having different gray scales suitable for display on the electronic ink display screen, and supplies the picture signal having the different gray scales to the micro control circuit 101. Of course, the module performing the video image conversion function may not be included in the display system based on the electronic ink technology, but be a part other than the display system. In the related art, the picture signal received by the micro control circuit 101 is a picture signal having different gray scales, not a video signal transmitted through, for example, a wired network or a wireless network.
As shown in fig. 1, the timing controller 102 may include a data transfer module 1021, an operation data module 1022, and a gate/source driver 1023. The data transmission module 1021 receives the picture signal transmitted by the micro control circuit 101 and transmits the received picture signal (image frame) to the video memory 103.
As shown in fig. 1, the video memory 103 includes an image buffer 1031, a previous image update buffer 1032, and a current image update buffer 1033. The image frames transferred to the video memory 103 by the data transfer module 1021 are first stored in the image buffer 1031. In the case where the timing controller 102 starts refreshing the electronic ink display screen 104, in step S1 in fig. 1, the timing controller 102 controls the video memory 103 to migrate the image frames in the image buffer 1031 to the current image update buffer 1033. Next, in step S2 in fig. 1, the operation data module 1022 of the timing controller 102 performs reading operations from the current image update buffer 1033 and the previous image update buffer 1032 at the same time, that is, reads an image frame to be currently displayed from the current image update buffer 1033 and reads an image frame previous to the image frame to be currently displayed from the previous image update buffer 1032. The operation data module 1022 compares the image frame to be displayed with the previous image frame of the image frame to be displayed, calculates the data required for driving the electronic ink display screen 104, and provides the data to the gate/source driver 1023 to drive the electronic ink display screen 104. After the electronic ink display screen 104 is refreshed, in step S3 of fig. 1, the timing controller 102 controls the video memory 103 to transfer the image frame to be currently displayed in the current image update buffer 1033 to the previous image update buffer 1032.
In the related art electronic ink technology-based display system, one image frame is migrated at least three times in the video memory, i.e., the aforementioned steps S1, S2, and S3. Due to the fact that the number of times of image frame migration is large, the efficiency of whole data transmission, data processing and refreshing display of a display system based on the electronic ink technology in the related technology is greatly limited. In particular, when the video data is a video stream, the related art electronic ink technology-based display system has difficulty in securing a display effect due to its architecture and operation. Moreover, because the data migration process is more, and because the physical characteristics of the video memory are limited, the probability of data errors during the migration process is increased, and therefore, the reliability of the display system based on the electronic ink technology in the related art is also affected.
In the related art electronic ink technology-based display system, the image buffer 1031, the previous image update buffer 1032, and the current image update buffer 1033 may be a plurality of storage portions in one video memory, or may be a plurality of separate memories. However, no matter how the image buffer 1031, the previous image update buffer 1032, and the current image update buffer 1033 are configured, the image frame migration process causes the aforementioned problems.
In the related art, if the contents (frames) stored in the previous image update buffer 1032 and the current image update buffer 1033 are the same, there is no difference (change) in the result of comparing the image frame to be currently displayed and the image frame previous to the image frame to be currently displayed. In this case, the electronic ink display still performs a refresh action, but such a refresh action may be considered as "empty refresh", i.e., without changing the displayed screen.
Aiming at the problems of the related art, the embodiment of the disclosure provides a new architecture of a display system based on an electronic ink technology and a refreshing method of an electronic ink display screen.
The display system based on the electronic ink technology provided in the embodiment of the disclosure can directly process the video stream to obtain the image frame without performing video signal processing by an external device, optimizes the video memory architecture, and only needs to perform data migration twice in the processes of data transmission, data processing and display refreshing, so that the efficiency of the whole data transmission, data processing and display refreshing of the display system is improved. The structure of a display system according to an embodiment of the present disclosure is described below with reference to fig. 2.
Fig. 2 is a block diagram of a schematic structure of an electronic ink technology based display system according to a specific embodiment of the present disclosure.
In contrast to the display system shown in fig. 1, the display system shown in fig. 2 does not include a micro control circuit and a timing controller, but includes a video stream processing apparatus 201. However, the video stream processing apparatus 201 has all or part of the functions of the timing controller in fig. 1. The display system based on the electronic ink technology according to the embodiment of the present disclosure includes a video stream processing apparatus 201, a display memory 202, and an electronic ink display screen 203. It should be noted that the video memory 202 shown in fig. 2 includes an image buffer 2021 and two frame buffers 2022 and 2023. The image buffer 2021 may be an image buffer similar to the image buffer 1031 shown in fig. 1. The two frame buffers 2022 and 2023 may be similar in physical structure to the current image update buffer 1033 and the previous image update buffer 1032 shown in FIG. 1, but operate in a completely different manner. In the display system shown in fig. 2, the odd frame is stored from the image buffer 2021 to the odd frame buffer 2022 and the even frame is stored to the even frame buffer 2023 without data migration between the current image update buffer 1033 and the previous image update buffer 1032 as shown in fig. 1.
In an embodiment of the present disclosure, the image buffer 2031 and the two frame buffers 2022 and 2023 may be three storage portions in one video memory 202, or may be a plurality of separate memories. That is, the display system shown in fig. 2 may include a video stream processing apparatus 201, an image buffer 2021, two frame buffers 2022 and 2023, an electronic ink display screen 203.
In the display system shown in fig. 2, the video stream processing apparatus 201 samples an input video stream to obtain a plurality of image frames arranged in order, stores the plurality of frames in the image buffer 2021 in the arrangement order, and stores at least two frames from the image buffer 2021 in the arrangement order in the two frame buffers 2022 and 2023, respectively. In embodiments of the present disclosure, the image frame may also be referred to as a picture frame, or simply a frame. In an embodiment of the present disclosure, the video stream processing apparatus 201 is capable of receiving a video stream, for example, a video stream of streaming media that is propagated through a wired network or a wireless network. The video stream processing apparatus 201 samples an input video stream to obtain a plurality of frames arranged in order, and stores the plurality of frames in the two frame buffers 2022 and 2023, respectively, in order. The video stream processing apparatus 201 reads the current frame displayed on the electronic ink display 203 and the next frame of the current frame from the two frame buffers 2022 and 2023, respectively, to compare the difference between the next frame of the current frame and the current frame, and refreshes the electronic ink display 203 based on the difference. The current frame referred to in the embodiments of the present disclosure refers to a frame currently displayed on the electronic ink display screen 203. In an embodiment of the present disclosure, sampling the input video stream to obtain the sequentially arranged plurality of frames may refer to extracting the sequentially arranged image frames from the video stream.
The beneficial effects of the embodiment of the disclosure are: according to the display system of the embodiment of the disclosure, through a video stream processing device, an image buffer, two frame buffers and an electronic ink display screen, wherein the video stream processing device samples an input video stream to obtain a plurality of frames arranged in sequence, stores the plurality of frames into the image buffer according to the arrangement sequence, and stores at least two frames into the two frame buffers from the image buffer according to the arrangement sequence, the video stream processing device reads a current frame displayed by the electronic ink display screen and a next frame of the current frame from the two frame buffers respectively to compare a difference between the next frame of the current frame and the current frame, and refreshes the electronic ink display screen based on the difference, a migration process of data required by the electronic ink display screen for displaying in a display memory can be reduced based on optimization of a display memory structure and improvement of a working mode, and optimizing the video memory scheduling efficiency. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the previous frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
In one embodiment of the present disclosure, the video stream processing apparatus 201 may include an image frame sampling module 2011, an operation data module 2012, and a gate/source driver 2013. The image frame sampling module 2011 samples an input video stream to obtain a plurality of frames arranged in order, and stores the plurality of frames in the image buffer 2021 in order, and stores the plurality of frames from the image buffer 2021 into the two frame buffers 2022 and 2023, respectively, in the arrangement order. The operation data module 2012 reads the current frame displayed on the electronic ink display 203 and the next frame of the current frame from the two frame buffers 2022 and 2023, respectively, to compare the difference between the next frame of the current frame and the current frame, and generates operation data based on the difference. The gate/source driver 2013 generates a gate/source driving signal according to the operation data to refresh the electronic ink display screen 203 based on the difference.
According to an embodiment of the present disclosure, by the video stream processing apparatus, comprising: an image frame sampling module for sampling an input video stream to obtain a plurality of frames arranged in sequence, and storing the plurality of frames in the image buffer in the arrangement sequence, and storing at least two frames from the image buffer in the two frame buffers, respectively, in the arrangement sequence; an operation data module for reading the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers respectively, comparing the difference between the next frame of the current frame and the current frame, and providing operation data based on the difference; and the gating/source driver is used for generating a gating/source driving signal according to the operation data so as to refresh the electronic ink display screen based on the difference, and can reduce the migration process of data required by the electronic ink display screen for displaying in the display memory based on the optimization of the display memory structure and the improvement of the working mode and optimize the scheduling efficiency of the display memory. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the previous frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
In one embodiment of the present disclosure, the image frame sampling module 2011 may be separate hardware, such as a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or a combination of software and hardware. The image frame sampling module 2011 may extract image frames from the video stream, e.g., 20, 24, 25, 30, 48, 60 frames per second of the video stream, etc. In one embodiment of the present disclosure, the frequency of extracting image frames of the video stream processing apparatus 201 may be determined according to various factors such as the data processing capability of the video stream processing apparatus 201, the data access speed of the two frame buffers 2022 and 2023, the refresh speed of the electronic ink display screen 203, and the like.
In one embodiment of the present disclosure, the two frame buffers 2022 and 2023 are respectively an odd frame buffer 2022 in which odd frames of the plurality of frames are sequentially stored and an even frame buffer 2023 in which even frames of the plurality of frames are sequentially stored. For example, the image frame sampling module 2011 extracts a first frame, a second frame, a third frame, and … N (N is an integer equal to or greater than 1) th frame from a video stream input to the video stream processing apparatus 201 at a preset frequency, and stores a plurality of frames in the image buffer 2021. The video stream processing apparatus 201 (or the operation data module 2012 therein) stores the first frame, the third frame, and … frame 2N-1 from the image buffer 2021 to the odd frame buffer 2022, and stores the second frame, the fourth frame, and … frame 2N to the even frame buffer 2023. In one embodiment of the present disclosure, the frequency at which the odd and even frames are stored from the image buffer 2021 to the odd and even frame buffers 2022 and 2023, respectively, may be the same as or different from the frequency at which the image frame sampling module 2011 acquires (extracts) image frames from the video stream, and may be the same as or different from the frequency at which the image frame sampling module 2011 stores image frames to the image buffer 2021. For example, each time the electronic ink display 203 is refreshed, if an odd frame is to be displayed after the refresh, the odd frame may be stored from the image buffer 2021 to the odd frame buffer 2022, and if an even frame is to be displayed after the refresh, the even frame may be stored from the image buffer 2021 to the even frame buffer 2023.
For example, the image frame sampling module 2011 may extract frames from the video stream at a frequency of 24 frames/second and store the extracted frames to the image buffer 2021 at a frequency of 24 frames/second, and store corresponding odd or even frames from the image buffer 2021 to the odd and even frame buffers 2022 and 2023, respectively, at a frequency of 24 frames/second. For another example, the image frame sampling module 2011 may extract frames from the video stream at a frequency of 48 frames/second and store the extracted frames to the image buffer 2021 at the frequency of 48 frames/second. However, if the refresh frequency of the electronic ink display 203 is only 24 frames/sec, one frame may be stored to the corresponding odd frame buffer 2022 and even frame buffer 2023 every other frame from among the frames stored in the image buffer 2021. That is, the odd frame buffer 2022 and the even frame buffer 2023 may only store the frames to be displayed after the electronic ink display 203 is refreshed.
According to the embodiment of the disclosure, the two frame buffers are respectively an odd frame buffer for sequentially storing odd frames in the plurality of frames and an even frame buffer for sequentially storing even frames in the plurality of frames, so that the video memory structure can be optimized to include the odd frame buffer and the even frame buffer, the migration process of data required by the display of the electronic ink display screen in the video memory is reduced through the improvement of the working mode, the scheduling efficiency of the video memory is optimized, and the overall efficiency of the display system based on the electronic ink technology from the receiving of the video stream to the display can be improved.
As shown in fig. 2, in the display system of the embodiment of the present disclosure, one image frame only needs to be migrated twice in the video memory, i.e., steps S11 and S12 shown in fig. 2. In step S11, the odd frame is stored from the image buffer 2021 to the odd frame buffer 2022 or the even frame is stored to the even frame buffer 2023. In step S12, the video stream processing apparatus 201 reads the current frame displayed on the electronic ink display screen 203 and the next frame of the current frame from the two frame buffers 2022 and 2023, respectively. The image frame is transferred less times, so that the overall data transmission, data processing and display refreshing efficiency of the display system is improved. In particular, when the video data is a video stream, the display system of the embodiment of the present disclosure can secure the display effect. Moreover, since the data migration operation is few, the probability of data errors in the migration operation is also small compared to the related art, and therefore, the reliability of the display system according to the embodiment of the present disclosure may also be improved.
In one embodiment of the present disclosure, both frame buffers 2022 and 2023 may each store only one frame. For example, the odd frame buffer 2022 stores only one odd frame as the current frame or the next frame to the current frame, and the even frame buffer 2023 stores only one even frame as the current frame or the next frame to the current frame. In one embodiment of the present disclosure, the odd and even frame buffers 2022, 2023 may have various memory sizes, e.g., have memory that can store more than one frame. The embodiments of the present disclosure may not limit the storage space of the odd frame buffer 2022 and the even frame buffer 2023.
According to the embodiment of the disclosure, two frame buffers used by the display system can be minimized by storing only one frame in each of the two frame buffers, thereby reducing the cost of the display system. And the migration process of data required by the electronic ink display screen in the video memory is reduced through the improvement of the working mode, and the scheduling efficiency of the video memory is optimized. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system.
In one embodiment of the present disclosure, if the contents (frames) stored in the two frame buffers 2022 and 2023 are the same, there is no difference (change) in the result of comparing the next frame of the current frame with the current frame. For example, the refresh operation of the electronic ink display screen calculated for each pixel point (pixel data) of the next frame of the current frame and the current frame is not refreshed (for example, the operation data is 00). In this case, the electronic ink display still performs a refresh action, but such a refresh action may be considered as "empty refresh", i.e., without changing the displayed screen.
In the display system according to the embodiment of the present disclosure, the total time for completely updating (i.e., completing the frame refresh from the received video stream to the electronic ink display screen) one frame of the image of the electronic ink display screen is denoted as T, where a sampling time, a screen refresh time and a waiting sampling time are respectively denoted as Ts, Tu and Tw. Sampling refers to extracting image frames from a video stream.
During the sampling time Ts, the receiving time of one frame in the video stream, the processing time of one frame in the video stream, and the time for storing the sampled frame in the video memory are included. In one embodiment of the present disclosure, the sampling time Ts may be controlled to coincide with the transmission time of one frame in the video stream. I.e. the beginning of a frame is transmitted to the display system and the previous frame is just finished sampling. In one embodiment of the present disclosure, the frame rate of the video stream may not be consistent with the sampling frequency of the display system, that is, the frame rate of the video stream is higher than the sampling frequency of the display system, and at this time, two adjacent frames sampled by the display system may not be adjacent frames in the video stream.
In the refresh time Tu of the electronic ink display screen, the time for moving the ink droplets in the microcapsules of all the pixels once through line-by-line scanning is Tu, and N times of refreshing are required to reach a specified gray scale (for example, the gray scale of the pixel of the aforementioned target), that is, Tu × N, where N is a positive integer.
After the electronic ink display screen is refreshed within the refreshing time Tu, the next sampling can be performed after waiting for a period of time Tw. Since each sampling must be performed from the beginning of a frame of image of the video stream, the following relationship must be found among the sampling time Ts, the screen refresh time Tu, and the waiting sampling time Tw: tu + Tw ═ k × Ts, where k is a positive integer.
By adjusting and controlling the parameters of the display system, the waiting sampling time Tw can be made small enough to be ignored. The total time for completely updating the image of one frame of the electronic ink display screen is simplified into T + Tu + Ts + N.
In one embodiment of the present disclosure, two frame buffers are arranged outside the image buffer to buffer the odd frame and the even frame respectively, and only two times of frame migration is performed in each buffer during the refreshing process, which is a technical means for optimizing the sampling time Ts. By optimizing the sampling time Ts, the total time T for updating the image of a frame of electronic ink display screen can be reduced.
In an embodiment of the present disclosure, the operation data module 2012 may read the current frame displayed on the electronic ink display screen and the next frame of the current frame from the two frame buffers 2022 and 2023, respectively, to compare the difference between the next frame of the current frame and the current frame, and generate the operation data based on the difference. The operation data module 2012, like the image frame sampling module 2011, may also be hardware or a combination of hardware and software.
In one embodiment of the present disclosure, the operation data module 2012 reads the current odd frame from the odd frame buffer 2022 as the current frame displayed on the electronic ink display 203 or as the next frame of the current frame, and reads the current frame from the even frame buffer 2023 as the current frame displayed on the electronic ink display 203 or as the current even frame of the next frame of the current frame, so as to compare the difference between the next frame of the current frame and the current frame. In one embodiment of the present disclosure, in a case where the current frame displayed on the electronic ink display 203 is an odd frame, the odd frame is stored in the odd frame buffer 2022, and in a case where the electronic ink display 203 starts to refresh, the operation data module 2012 may read the current frame from the odd frame buffer 2022 and read the next frame of the current frame from the even frame buffer 2023 to compare a difference between the next frame of the current frame and the current frame. In one embodiment of the present disclosure, in case that the current frame displayed on the electronic ink display 203 is an even frame, the even frame is stored in the even frame buffer 2023, and in case that the electronic ink display 203 starts refreshing, the operation data module 2012 may read the current frame from the even frame buffer 2023 and read the next frame of the current frame from the odd frame buffer 2022 to compare the difference between the next frame of the current frame and the current frame.
In one embodiment of the present disclosure, the difference between the next frame of the current frame and the current frame may refer to a difference between the same positions (pixels) of the two image frames, for example, a difference between the first pixel in the upper left corner of the next frame of the current frame and the first pixel in the upper left corner of the current frame. In one embodiment of the present disclosure, the difference between the next frame of the current frame and the current frame may be compared pixel by pixel to obtain the difference between the pixels, thereby obtaining the difference between the two image frames. In one embodiment of the present disclosure, the operation data module 2012 provides the operation data based on the difference to the gate/source driver 2013, so that the gate/source driver 2013 generates the gate/source driving signal according to the operation data to refresh the electronic ink display screen based on the difference. In one embodiment of the present disclosure, the difference refers to a specific change of which pixels of the current frame are changed with respect to the next frame of the current frame, and the gate/source driver 2013 drives only the pixels of the electronic ink display screen 203 which are changed according to the gate/source driving signal generated by the difference to display the next frame of the current frame.
In one embodiment of the present disclosure, the gate/source driver 2013 drives the electronic ink display 203 to refresh to display the current even frame based on the difference, according to the current frame displayed by the electronic ink display 203 being the current odd frame. In one embodiment of the present disclosure, the gate/source driver 2013 drives the electronic ink display 203 to refresh to display the current odd frame based on the difference, according to the current frame displayed by the electronic ink display 203 being the current even frame.
In one embodiment of the present disclosure, in response to the refresh of the electronic ink display screen being completed, the video stream processing apparatus deletes the frame that is no longer displayed after the refresh, i.e., the aforementioned current frame (which has not been displayed any more after the refresh), from one of the two frame buffers 2022 and 2023.
According to the embodiment of the disclosure, by responding to the completion of the refreshing of the electronic ink display screen and deleting the frames which are not displayed any more after the refreshing from one of the two frame buffers, the migration process of the data required by the electronic ink display screen to display in the video memory can be reduced based on the optimization of the video memory structure and the improvement of the working mode, and the video memory scheduling efficiency is optimized.
In one embodiment of the present disclosure, data in one pixel is stored as one unit in the two frame buffers 2022 and 2023. Therefore, data of one pixel in one frame is stored as one unit in the odd frame buffer 2022 and the even frame buffer 2023. In one embodiment of the present disclosure, the data of a pixel represents a gray level of the pixel, i.e., multi-level gray data. In one embodiment of the present disclosure, the number of bits of one unit may be 1 bit, or 2 bits, or 4 bits, or 8 bits, and so on. Data of 1 bit corresponds to 2 gray scales (i.e., 2-step gray scales), data of 2 bit corresponds to 4 gray scales (i.e., 4-step gray scales), data of 4 bit corresponds to 16 gray scales (i.e., 16-step gray scales), and data of 8 bit corresponds to 256 gray scales (i.e., 256-step gray scales). In one embodiment of the present disclosure, the image buffer 2021 may also store data of one pixel as one unit.
According to the embodiment of the disclosure, data of one pixel in one frame is stored in the odd frame buffer and the even frame buffer as a unit, the difference between the current frame and the next frame of the current frame respectively stored in the two buffers can be compared by taking the pixel as a unit to obtain the difference of the frames, and then the electronic ink display screen is refreshed based on the pixel level difference of the frames, so that the state of the pixels in the electronic ink display screen is changed as few as possible, the refreshing efficiency can be improved, and the display effect is optimized.
In one example, when the electronic ink display 203 is refreshed, if an odd frame (a frame that is an even frame on the screen) is ready to be displayed, the frame in the even frame buffer 2023 is taken as the "source" and the frame in the odd frame buffer 2022 is taken as the "destination", and the refresh is performed according to the difference between the "destination" and the "source". For the case where even frames are ready to be displayed, the process is similar. For example, when the frame to be displayed is a 2 gray scale, if the source is 0 (black) and the target is 1 (white), a control signal for pushing ink droplets in microcapsules corresponding to the target pixel of the source in the electronic ink display screen 203 to move to white is generated. The control signal format is different for electronic ink display screens of different interfaces. For example, the control signal is 01 for the electronic ink display screen of the TTL interface, and 011 for the electronic ink display screen of the Mini-LVDS interface. For example, when the frame to be displayed is a 2 gray scale, if the source is 1 (white) and the target is 0 (black), a control signal for pushing ink droplets in microcapsules corresponding to the target pixel of the source in the electronic ink display screen 203 to move to black is generated. For example, the control signal is 10 for the electronic ink display screen of the TTL interface, and 100 for the electronic ink display screen of the Mini-LVDS interface. When the gray level of the frame to be displayed is greater than 2, the preset lookup table is used for looking up the multi-step black or white motion data from the source to the target. The lookup table may be provided by the manufacturer of the electronic ink display screen, or may be set by the user of the electronic ink display screen according to the needs of the user and the actual situation of the electronic ink display screen.
The structure of the display system shown in fig. 2 is merely an example, and the structure of the video stream processing apparatus 201 in fig. 2 is not limited to that shown in fig. 2, and the included components or modules are merely listed exemplarily for convenience of explaining the functions of the video stream processing apparatus 201, and may include more or less components or modules, or may include different components or modules from those shown in fig. 2, as long as the functions of the video stream processing apparatus 201 are completed. For example, the video stream processing apparatus 201 in fig. 2 may incorporate a video memory 202 (i.e., an image buffer 2021 and two frame buffers 2022 and 2023). The present disclosure does not limit the structure of the video stream processing apparatus 201.
A method of refreshing an electronic ink display screen according to an embodiment of the present disclosure is described below with reference to fig. 3.
FIG. 3 is a flow chart of a method for refreshing an electronic ink display according to an embodiment of the present disclosure. The method for refreshing the electronic ink display screen shown in fig. 3 includes steps S301, S302, S303, and S304.
In step S301, an input video stream is sampled to obtain a plurality of frames arranged in sequence.
In step S302, the plurality of frames are stored in the image buffer in the order of arrangement.
In step S303, at least two frames are stored from the image buffer into the two frame buffers, respectively, in the order of arrangement.
In step S304, a current frame displayed on the electronic ink display screen and a next frame of the current frame are respectively read from the two frame buffers, so as to compare a difference between the next frame of the current frame and the current frame.
In step S305, the electronic ink display screen is refreshed based on the difference.
According to an embodiment of the present disclosure, a plurality of frames arranged in sequence are obtained by sampling an input video stream; storing the plurality of frames in the image buffer in an order of arrangement; storing at least two frames from the image buffer into the two frame buffers according to the arrangement sequence; respectively reading a current frame displayed by an electronic ink display screen and a next frame of the current frame from the two frame buffers to compare the difference between the next frame of the current frame and the current frame; the electronic ink display screen is refreshed based on the difference, the migration process of data required by the electronic ink display screen to display in the display memory can be reduced based on the optimization of the display memory structure and the improvement of the working mode, and the display memory scheduling efficiency is optimized. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the previous frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
In one embodiment of the present disclosure, step S303 includes: storing odd frames of the plurality of frames to an odd frame buffer and storing even frames of the plurality of frames to an even frame buffer in the order of the permutation.
According to an embodiment of the present disclosure, storing at least two frames from the image buffer into the two frame buffers according to the arrangement order, respectively, includes: according to the arrangement sequence, the odd frames in the plurality of frames are stored in the odd frame buffer, and the even frames in the plurality of frames are stored in the even frame buffer, so that the video memory structure can be optimized to comprise the odd frame buffer and the even frame buffer, the migration process of data required by the display of the electronic ink display screen in the video memory is reduced through the improvement of the working mode, and the scheduling efficiency of the video memory is optimized. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system.
In one embodiment of the present disclosure, step S304 includes: reading a current odd frame which is a current frame displayed by the electronic ink display screen or a current odd frame which is a next frame of the current frame from the odd frame buffer, and reading the current frame displayed by the electronic ink display screen or the current even frame which is the next frame of the current frame from the even frame buffer so as to compare the difference between the next frame of the current frame and the current frame.
According to an embodiment of the present disclosure, the reading the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers respectively to compare the difference between the next frame of the current frame and the current frame includes: reading a current frame displayed by the electronic ink display screen or a current odd frame used as a next frame of the current frame from the odd frame buffer, reading the current frame displayed by the electronic ink display screen or a current even frame used as the next frame of the current frame from the even frame buffer, comparing the difference between the next frame of the current frame and the current frame, optimizing the video memory structure to include the odd frame buffer and the even frame buffer, reducing the migration process of data required by the electronic ink display screen in the video memory through the improvement of the working mode, and optimizing the video memory scheduling efficiency. Moreover, the overall efficiency of the display system based on the electronic ink technology from receiving the video stream to displaying is improved due to the optimization of the overall structure of the display system. Moreover, the difference of the frames is obtained by comparing the current frame and the next frame of the current frame which are respectively stored in the two buffers, and the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen can be changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
In one embodiment of the present disclosure, step S305 includes: refreshing the electronic ink display screen based on the difference to display a current even frame according to the fact that the current frame displayed by the electronic ink display screen is the current odd frame; or refreshing the electronic ink display screen based on the difference to display the current odd frame according to the fact that the current frame displayed by the electronic ink display screen is the current even frame.
According to an embodiment of the present disclosure, refreshing the electronic ink display screen based on the difference by the refreshing includes: refreshing the electronic ink display screen based on the difference to display a current even frame according to the fact that the current frame displayed by the electronic ink display screen is the current odd frame; or according to the fact that the current frame displayed by the electronic ink display screen is the current even frame, the electronic ink display screen is refreshed based on the difference to display the current odd frame, the electronic ink display screen can be refreshed based on the frame difference, and therefore the state of the pixels in the electronic ink display screen is changed as few as possible, so that the refreshing efficiency can be improved, and the display effect is optimized.
In an embodiment of the present disclosure, a method for refreshing an electronic ink display according to an embodiment of the present disclosure further includes: and in response to the completion of the refreshing of the electronic ink display screen, deleting frames which are not displayed any more after refreshing from one of the two frame buffers.
According to the embodiment of the disclosure, by responding to the completion of the refreshing of the electronic ink display screen and deleting the frames which are not displayed any more after the refreshing from one of the two frame buffers, the migration process of the data required by the electronic ink display screen to display in the video memory can be reduced based on the optimization of the video memory structure and the improvement of the working mode, and the video memory scheduling efficiency is optimized.
In one embodiment of the present disclosure, data of one pixel in one frame is stored as one unit in the odd frame buffer and the even frame buffer.
According to the embodiment of the disclosure, data of one pixel in one frame is stored in the odd frame buffer and the even frame buffer as a unit, the difference between the current frame and the next frame of the current frame respectively stored in the two buffers can be compared by taking the pixel as a unit to obtain the difference of the frames, and then the electronic ink display screen is refreshed based on the pixel level difference of the frames, so that the state of the pixels in the electronic ink display screen is changed as few as possible, the refreshing efficiency can be improved, and the display effect is optimized.
In one embodiment of the present disclosure, the data of the pixel represents a gray level of the pixel.
According to the embodiment of the disclosure, the gray scale of the pixel is represented by the data of the pixel, the difference of the frames can be obtained by comparing the current frame and the next frame of the current frame which are respectively stored in the two buffers, and then the electronic ink display screen is refreshed based on the difference of the frames, so that the state of the pixels in the electronic ink display screen is changed as few as possible, the refreshing efficiency can be improved, and the display effect can be optimized.
In one possible design, the structure of the aforementioned display system may be implemented as an electronic device, as shown in fig. 4, the electronic device 400 may include a processor 401 and a memory 402.
The memory 402 is used for storing a program for supporting a processor to execute the method for refreshing the electronic ink display screen in any of the above embodiments, and the processor 401 is configured to execute the program stored in the memory 402. In one embodiment of the present disclosure, the memory 402 is used only for storing programs and not for frame storage.
The memory 402 is used to store one or more computer instructions that are executed by the processor 401 to implement all or a portion of the aforementioned method steps.
The exemplary embodiments of the present disclosure also provide a computer storage medium for storing computer software instructions used by the embodiments of the present disclosure, which includes a program for executing the method in any of the embodiments, thereby providing technical effects brought by the method.
In one embodiment of the present disclosure, the foregoing scheme may be applied to a color electronic ink display screen. In the color electronic ink display screen, the surface of each pixel is coated with a color filter, and the pixel implementation adopts a black-white electronic ink technology. By the black-and-white degree (gray scale) of each pixel, a color value of the corresponding color can be realized. The specific implementation manner of the method can be obtained through related technologies, and details are not repeated in the present disclosure.
Those of skill would further appreciate that the various illustrative logical blocks, units, and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, elements, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present disclosure.
The various illustrative logical blocks, or elements, described in connection with the embodiments disclosed herein may be implemented or operated by a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may be located in a user terminal. In the alternative, the processor and the storage medium may reside in different components in a user terminal.
The above-mentioned embodiments, objects, technical solutions and advantages of the embodiments of the present disclosure are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present disclosure, and are not intended to limit the scope of the embodiments of the present disclosure, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the embodiments of the present disclosure should be included in the scope of the embodiments of the present disclosure.

Claims (10)

1. A display system, comprising:
a video stream processing device, an image buffer, two frame buffers and an electronic ink display screen,
wherein the content of the first and second substances,
the video stream processing apparatus samples an input video stream to obtain a plurality of frames arranged in order, stores the plurality of frames in the image buffer in the arrangement order, and stores at least two frames from the image buffer in the two frame buffers respectively in the arrangement order,
the video stream processing device respectively reads the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers to compare the difference between the next frame of the current frame and the current frame, and refreshes the electronic ink display screen based on the difference.
2. The display system according to claim 1, wherein the two frame buffers are respectively an odd frame buffer in which odd frames of the plurality of frames are sequentially stored and an even frame buffer in which even frames of the plurality of frames are sequentially stored.
3. The display system according to claim 2, wherein both of the two frame buffers store only one frame.
4. A display system according to any one of claims 1 to 3, wherein the video stream processing means comprises:
an image frame sampling module for sampling an input video stream to obtain a plurality of frames arranged in sequence, and storing the plurality of frames in the image buffer in the arrangement sequence, and storing at least two frames from the image buffer in the two frame buffers, respectively, in the arrangement sequence;
an operation data module for reading the current frame displayed by the electronic ink display screen and the next frame of the current frame from the two frame buffers respectively, comparing the difference between the next frame of the current frame and the current frame, and providing operation data based on the difference;
a gate/source driver for generating gate/source drive signals from the operational data to refresh the electronic ink display screen based on the difference.
5. A method for refreshing an electronic ink display screen, comprising:
sampling an input video stream to obtain a plurality of frames arranged in sequence;
storing the plurality of frames in the image buffer in an order of arrangement;
storing at least two frames from the image buffer into the two frame buffers according to the arrangement sequence;
respectively reading a current frame displayed by an electronic ink display screen and a next frame of the current frame from the two frame buffers to compare the difference between the next frame of the current frame and the current frame;
refreshing the electronic ink display screen based on the difference.
6. The method of claim 5, wherein storing at least two frames from the image buffer into the two frame buffers in the order of arrangement comprises:
storing odd frames of the plurality of frames to an odd frame buffer and storing even frames of the plurality of frames to an even frame buffer in the order of the permutation.
7. The method according to claim 6, wherein said reading a current frame displayed on an electronic ink display screen and a next frame of the current frame from the two frame buffers respectively to compare a difference between the next frame of the current frame and the current frame comprises:
reading a current odd frame which is a current frame displayed by the electronic ink display screen or a current odd frame which is a next frame of the current frame from the odd frame buffer, and reading the current frame displayed by the electronic ink display screen or the current even frame which is the next frame of the current frame from the even frame buffer so as to compare the difference between the next frame of the current frame and the current frame.
8. The method of claim 7, wherein refreshing the electronic ink display screen based on the difference comprises:
refreshing the electronic ink display screen based on the difference to display a current even frame according to the fact that the current frame displayed by the electronic ink display screen is the current odd frame; or refreshing the electronic ink display screen based on the difference to display the current odd frame according to the fact that the current frame displayed by the electronic ink display screen is the current even frame.
9. The method of any of claims 5 to 8, further comprising:
and in response to the completion of the refreshing of the electronic ink display screen, deleting frames which are not displayed any more after refreshing from one of the two frame buffers.
10. A method according to any one of claims 5 to 8, wherein data for a pixel in a frame is stored as a unit in the odd frame buffer and the even frame buffer.
CN202111145392.7A 2021-09-28 2021-09-28 Display system and refreshing method of electronic ink display screen Pending CN113867677A (en)

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