CN114023272A

CN114023272A - Method and terminal equipment for eliminating residual shadow of ink screen

Info

Publication number: CN114023272A
Application number: CN202111339206.3A
Authority: CN
Inventors: 步晨; 朱聪; 张华伟
Original assignee: Hisense Mobile Communications Technology Co Ltd
Current assignee: Hisense Mobile Communications Technology Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-02-08
Anticipated expiration: 2041-11-12
Also published as: CN114023272B

Abstract

The application relates to the technical field of terminals, and discloses a method for eliminating residual shadows of an ink screen and terminal equipment. The method comprises the following steps: recording color values displayed by pixel points in a multi-frame image to obtain display records of the pixel points; and if the pixel point is determined to need to eliminate the residual image based on the display record, eliminating the residual image of the pixel point in a specified frame number displayed later, wherein the specified frame number meets the requirement that a specified color is displayed at the pixel point, the specified color is black if the bottom color of the display screen is white, and the specified color is white if the bottom color of the display screen is black. By the method, the pixels with the residual shadows can be automatically refreshed only in the state that the user does not sense or feels weakly, so that the residual shadows of the ink screen are reduced or even eliminated, and the reading and using experience of the user is improved.

Description

Method and terminal equipment for eliminating residual shadow of ink screen

Technical Field

The application relates to the technical field of terminals, in particular to a method and terminal equipment for eliminating residual shadows of an ink screen.

Background

Each pixel point in the ink-water screen comprises a plurality of black capsules with negative charges and white capsules with positive charges, the top layer and the bottom layer of the screen are used as two conductive electrode plates, and when the voltage application time is controlled and the positive voltage and the negative voltage are changed alternately, the black capsules and the white capsules float to the top layer of the screen in different proportions, and gray with different gray values can be displayed. However, when the gray value change between two frames is large, the control voltage application time is short, which results in insufficient power and time for the capsule to move to the proper position, thereby causing the occurrence of afterimage.

In the prior art, when a manual global refreshing method is used for removing ghosts, the whole screen can be refreshed, a user can obviously feel the change of the whole screen, and certain power consumption can be increased.

Disclosure of Invention

The application aims to provide a method and terminal equipment for eliminating residual shadows of an ink screen, and the method and terminal equipment are used for solving the problems that in the prior art, the residual shadows are eliminated by using a manual global refreshing method, so that images cannot be normally displayed during refreshing, and certain power consumption is increased.

In a first aspect, the present application provides a method for eliminating an ink screen ghost, which is applied to a second-order display mode, and the method includes:

recording color values displayed by pixel points in a multi-frame image to obtain display records of the pixel points;

and if the pixel point is determined to need to eliminate the residual image based on the display record, eliminating the residual image of the pixel point in a specified frame number displayed later, wherein the specified frame number meets the requirement that a specified color is displayed at the pixel point, the specified color is black if the bottom color of the display screen is white, and the specified color is white if the bottom color of the display screen is black.

In a possible implementation manner, the recording color values displayed by the pixel points in the multi-frame image to obtain the display records of the pixel points includes:

recording the color value displayed by the pixel point in each frame of image in the multi-frame of image;

if the color value displayed by the pixel point is the designated color, the value of the display record of the pixel point is configured to be a first value;

if the color value displayed by the pixel point is the background color of the display screen, accumulating the value of the display record of the pixel point by a second value;

the initial value of the display record is a third value, and the third value is used for indicating that the operation of eliminating the ghost shadow is completed.

In a possible implementation manner, determining whether the pixel point needs to eliminate the afterimage based on the display record specifically includes:

if the value of the display record of the pixel point is larger than or equal to a preset threshold value, determining that the pixel point needs to eliminate the ghost;

and if the value of the display record is smaller than the preset threshold value, determining that the pixel point does not need to eliminate the ghost.

In a possible embodiment, after determining that the pixel needs to be subjected to image sticking elimination based on the display record and before eliminating the image sticking of the pixel within a specified number of frames, the method further includes:

marking pixel points needing to eliminate residual shadows in a display screen, and calculating the proportion of the currently marked pixel points in all the pixel points in one frame of image in real time;

if the proportion is larger than or equal to the proportion threshold, the operation of eliminating the residual image of the pixel point in the appointed frame number is executed aiming at any pixel point marked as needing to eliminate the residual image.

In one possible embodiment, the method further comprises:

and when the appointed frame number is not reached and the residual image of the pixel point is not completely eliminated, if the pixel point redisplays the appointed color based on the content to be displayed, setting the display record of the pixel point to be the first value, and finishing the operation of eliminating the residual image of the pixel point.

In a possible implementation manner, the eliminating the afterimage of the pixel point within the specified number of frames to be displayed later specifically includes:

if the number of the appointed frames is not reached and a new image frame is not received within the preset time, continuously eliminating the ghost of the pixel point in the current image frame;

and if the number of the appointed frames is not reached and a new image frame is generated within the preset time, eliminating the ghost of the pixel point in the new image frame.

In one possible embodiment, the method further comprises:

and resetting the display record of the pixel point to be a third value after the afterimage of the pixel point is eliminated.

In a second aspect, the present application provides a terminal device, comprising:

a display, a processor, and a memory;

the display is used for displaying information;

the memory to store the processor-executable instructions;

the processor is configured to execute the instructions to implement the method for eliminating the ink screen ghost as any one of the first aspect.

In a third aspect, the present application provides a computer-readable storage medium, wherein when instructions in the computer-readable storage medium are executed by a terminal device, the terminal device is enabled to execute the method for eliminating the ink screen ghost as described in any one of the first aspect.

In a fourth aspect, the present application provides a computer program product comprising a computer program, which when executed by a processor, implements the method for removing an ink screen ghost as described in any one of the first aspects above.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects:

in the embodiment of the application, the display record of the pixel point is obtained by recording the color value displayed by the pixel point in the multi-frame image; and if the pixel point is determined to need to eliminate the residual image based on the display record, eliminating the residual image of the pixel point in a specified frame number displayed later, wherein the specified frame number meets the requirement that a specified color is displayed at the pixel point, the specified color is black if the bottom color of the display screen is white, and the specified color is white if the bottom color of the display screen is black. Need not the operation of user's manual trigger elimination ghost, this application only need refresh to the pixel that has the ghost simultaneously, and not refresh whole screen for can the automatic refresh pixel under the state that the user does not have perception or weak perception, thereby alleviate or even eliminate the ghost of ink screen, improve user's use and experience.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a basic structure of an ink screen provided in an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a state of an ink-jet screen displaying a residual image according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating a moving state of black and white particles during an image sticking elimination process according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 5 is a block diagram of a software structure of a terminal device according to an embodiment of the present application;

FIG. 6 is a flowchart illustrating a method for removing an afterimage of an ink screen according to an embodiment of the present disclosure;

fig. 7 is a schematic flow chart of display recording of a recording pixel point in a first frame image according to an embodiment of the present disclosure;

fig. 8 is a schematic flowchart illustrating an operation of removing residual images on a single pixel point in real time according to an embodiment of the present disclosure;

fig. 9 is a schematic flowchart illustrating another operation of immediately removing the afterimage for a single pixel according to an embodiment of the present disclosure;

fig. 10 is a flowchart illustrating an operation of removing the residual image by alignment of dynamic unadded pixel groups according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The embodiments described are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Also, in the description of the embodiments of the present application, "/" indicates or means, for example, a/B may indicate a or B; "and/or" in the text is only an association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: three cases of a alone, a and B both, and B alone exist, and in addition, "a plurality" means two or more than two in the description of the embodiments of the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "second" may explicitly or implicitly include one or more of that feature, and in the description of embodiments of the application, "a plurality" means two or more unless otherwise indicated.

The basic structure of the ink screen is explained below with reference to fig. 1, so as to be easily understood by those skilled in the art.

Referring to fig. 1, a schematic diagram of a basic structure of an ink screen provided in an embodiment of the present application is shown. As shown in fig. 1, the ink screen includes: an upper layer 101, a transparent electrode layer 102, transparent microcapsules 103, positively charged white particles 104, negatively charged black particles 105, a transparent liquid (oil) 106, an electrode pixel layer 107, a bottom electrode plate 108.

The electrode pixel layer 107 and the bottom electrode plate 108 can also be combined, because the bottom electrode plate 108 is composed of a plurality of electrode plates, and the plurality of electrode plates can be manufactured according to pixel distribution, each electrode plate in the bottom electrode plate 108 can be controlled independently, and all the electrode plates can be controlled uniformly, that is, the whole bottom electrode plate 108 can be controlled integrally.

The ink screen is composed of a plurality of electronic inks which can be seen as individual transparent microcapsules 103. Each transparent microcapsule 103 contains positively charged white particles 104 and negatively charged black particles 105 suspended in a transparent liquid (oil) 106. The transparent electrode layer 102 and the bottom electrode plate 108 are used as two conductive plates, when a negative voltage is applied to the transparent electrode layer 102 and a positive voltage is applied to the bottom electrode plate 108 for a long time, the positively charged white particles 104 move to the upper layer 101 of the transparent microcapsule 103, and at the same time, the negatively charged black particles 105 are attracted to the electrode pixel layer 107 of the transparent microcapsule 103, so that each pixel point on the upper layer 101 of the ink screen is displayed as white; in contrast, when a positive voltage is applied to the transparent electrode layer 102 and a negative voltage is applied to the bottom electrode plate 108 for a long time, the negatively charged black particles 105 move toward the upper layer 101 of the transparent microcapsule 103, while the positively charged white particles 104 are attracted to the electrode pixel layer 107 of the transparent microcapsule 103, so that each pixel point on the upper layer 101 of the ink screen is displayed in black.

When the voltage application time is controlled and the positive and negative voltages are alternately changed, the positively charged white particles 104 and the negatively charged black particles 105 move to the upper layer 101 of the transparent microcapsule 103 at different ratios, and the upper layer 101 displays gray colors of different gray values. As shown in fig. 2, when the gray level change between two images is large and the control voltage application time is short, the white particles 104 and the black particles 105 do not have enough time and power to move to the proper positions, thereby causing the ghost state of the upper layer 101 of the ink screen.

Hereinafter, some terms related to the method for removing the ink screen ghost provided in the embodiment of the present application will be explained to facilitate understanding by those skilled in the art.

(1) Mode a 2: the method mainly aims at a special mode when an ink screen needs to be refreshed quickly when browsing a webpage, handwriting, watching a video and the like, and the content of the original display 16-level gray scale is displayed in a black-white two-pole gray scale, so that the consumption of performance and time caused by rendering the gray scale is reduced, and the refreshing speed is higher.

(2) A2 residual average gray scale: under a specific electronic ink screen and a specific voltage control sequence, in an a2 (fast refresh) mode, when a pixel displaying 100% gray displays 0% gray in the next frame image, the average gray of afterimages is left. According to the screen characteristics of the ink screen and the test results, the gray level of the afterimage depends on the voltage control sequence and the screen characteristics, and an inappropriate voltage control sequence can generate more afterimages, but the equivalent gray level is generally not higher than 10%.

(3) Equivalent gray scale: when the "gradation of afterimage" is equal to the "certain specific display gradation reached by the ink-and-wash screen by applying a voltage", the gradation value of the specific display gradation is regarded as the equivalent gradation of afterimage.

(4) Voltage control sequence: when the gray scale of a certain pixel is changed from the previous state a to the other state B, the black-and-white particles have inertia and collide with each other, so that it is necessary to apply positive and negative voltages in sequence to make the black-and-white particles reach the correct position, and it is not necessary to simply apply a voltage once. For example: when a certain pixel changes from pure black to 50% gray, the following steps can be performed: a voltage sequence of 0, 2, 2, 2, 2, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0 in which 0 represents no voltage application, 1 represents that the upper plate (transparent electrode layer 102) applies a positive voltage, and 2 represents that the upper plate applies a negative voltage for a period of 11.76ms (milliseconds) is applied, is not necessarily an optimal solution, and is used only as a reference. The more the voltage sequence is applied, the longer the time is taken, and the more the black-and-white particles tend to reach the correct position, so that the long voltage sequence is applied to reduce or even eliminate the afterimage, and the short voltage sequence is applied to obtain the quick screen response.

(5) wave form: the above only exemplifies the voltage control sequence when a certain pixel is switched from pure black to 50% gray, and in fact, a reader supporting 16-step gray display needs to have 16 × 16 voltage control sequences, i.e. 256 voltage control sequences, if the influence of temperature on the transparent liquid (oil) 106 is considered, the most suitable voltage control sequence needs to be tested at different temperatures, and the table summarized by the set of voltage control sequences is called waveform.

Typical refresh modes of the prior art ink screen include a GU (direct update) mode, a GC (global clear refresh) mode, an a2 mode, and the like. The GU mode is a global refreshing mode, and ultralong voltage sequence refreshing is carried out on pixels of a full screen; the GC mode is a clear refreshing mode, and long voltage sequence refreshing is carried out on pixels with gray level change between two frames of images; the a2 mode is a fast refresh mode, and performs short voltage sequence refresh for pixels with gray scale change between two frame images.

At present, a refresh mode used when each manufacturer removes an afterimage is generally a GU mode, and when a new image frame arrives, a positive voltage is applied to a transparent electrode layer on an upper layer of a screen of a full-screen pixel at first to enable most of white particles with positive charges to leave a limit position of the upper layer of the screen, and then a negative voltage is applied to the transparent electrode layer on the upper layer of the screen until all the white particles with positive charges move to the limit position of the upper layer of the screen, so that the upper layer of the screen is in a pure white state without the afterimage, and then different voltages are applied to different pixels according to a displayed image to display a normal image.

It should be noted that, in the actual test, it is found that, as shown in fig. 3, it is easy to cause some of the negatively charged black particles to be surrounded by the positively charged white particles and not fall down by applying a voltage only once, and therefore, as shown in (b), it is necessary to apply a positive voltage to the transparent electrode layer on the upper layer of the screen first to cause the positively charged white particles to fall down, thereby releasing the wrapping of the negatively charged black particles, and when most of the positively charged white particles are separated from the top position of the screen, a negative voltage is applied to the transparent electrode layer on the upper layer of the screen for a long time until almost all of the positively charged white particles move to the limit position of the upper layer of the screen, as shown in (c). This also explains why different gray values need to be displayed according to a certain voltage sequence.

Therefore, the black particles and the white particles move to the extreme positions of the screen respectively, and the afterimage removal is completed, but when the afterimage is removed by using the manual global refreshing method, the black particles and the white particles move to the upper layer of the screen in batches, so that a user can see that the whole ink screen flickers once according to the black-white sequence, and finally, a normal image is displayed.

In the related technology, the method can eliminate the residual image only by moving 80% of the black particles to the extreme position of the upper layer of the screen without completely moving the black particles to the extreme position of the upper layer of the screen, so that a user can see that the whole ink screen flickers once according to the gray-white sequence, and the user has visual sense improvement relative to the black-white flickers, but still needs to refresh the pixels of the whole screen, so that the image cannot be normally displayed during refreshing, and certain power consumption can be increased.

In view of this, the present application provides a method and a terminal device for eliminating an ink screen ghost, so as to solve the problems that in the prior art, a manual global refresh method is used to eliminate the ghost, pixels of a full screen still need to be refreshed, so that an image cannot be normally displayed during refreshing, and a certain power consumption is increased.

The inventive concept of the present application can be summarized as follows: in the embodiment of the application, the display record of the pixel point is obtained by recording the color value displayed by the pixel point in the multi-frame image; and if the pixel point is determined to need to eliminate the residual image based on the display record, eliminating the residual image of the pixel point in a specified frame number displayed later, wherein the specified frame number meets the requirement that a specified color is displayed at the pixel point, the specified color is black if the bottom color of the display screen is white, and the specified color is white if the bottom color of the display screen is black. The realization can only refresh to the pixel that has the afterimage automatically under the state that the user does not have perception or the feelings of weakness to alleviate or even eliminate the afterimage of ink screen, promote user's reading and use experience.

After the inventive concept of the present application is introduced, the terminal device provided in the present application will be described below. Fig. 4 shows a schematic structural diagram of a terminal device 400. It should be understood that the terminal device 400 shown in fig. 4 is only an example, and the terminal device 400 may have more or fewer components than shown in fig. 4, may combine two or more components, or may have a different configuration of components. The various components shown in fig. 4 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

A block diagram of a hardware configuration of a terminal device 400 according to an exemplary embodiment is exemplarily shown in fig. 4. As shown in fig. 4, the terminal device 400 includes: radio Frequency (RF) circuit 410, memory 420, display unit 430, camera 440, sensor 450, audio circuit 460, Wireless Fidelity (Wi-Fi) module 470, processor 480, bluetooth module 481, and power supply 490.

The RF circuit 410 may be used for receiving and transmitting signals during information transmission and reception or during a call, and may receive downlink data of a base station and then send the downlink data to the processor 480 for processing; the uplink data may be transmitted to the base station. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 420 may be used to store software programs and data. The processor 480 executes various functions of the terminal device 400 and data processing by executing software programs or data stored in the memory 420. The memory 420 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. The memory 420 stores an operating system that enables the terminal device 400 to operate. The memory 420 may store an operating system and various application programs, and may also store program codes for performing the methods described in the embodiments of the present application.

The display unit 430 may be used to receive input numeric or character information, generate signal input related to user settings and function control of the terminal apparatus 400, and particularly, the display unit 430 may include a touch screen 431 disposed on the front surface of the terminal apparatus 400, and may collect touch operations of a user thereon or nearby, such as clicking a button, dragging a scroll box, and the like.

The display unit 430 may also be used to display information input by the user or information provided to the user and a Graphical User Interface (GUI) of various menus of the terminal apparatus 400. Specifically, the display unit 430 may include a display screen 432 disposed on the front surface of the terminal device 400. The display screen 432 may be an ink screen.

The touch screen 431 may cover the display screen 432, or the touch screen 431 and the display screen 432 may be integrated to implement the input and output functions of the terminal device 400, and after the integration, the touch screen may be referred to as a touch display screen for short. The display unit 430 in this application can display the application programs and the corresponding operation steps.

The camera 440 may be used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The light sensing elements convert the light signals into electrical signals which are then passed to the processor 480 for conversion into digital image signals.

The terminal device 200 may further comprise at least one sensor 450, such as an acceleration sensor 451, a distance sensor 452, a fingerprint sensor 453, a temperature sensor 454. The terminal device 400 may also be configured with other sensors such as a gyroscope, barometer, hygrometer, thermometer, infrared sensor, light sensor, motion sensor, and the like.

The audio circuit 460, speaker 461, microphone 462 may provide an audio interface between a user and the terminal device 400. The audio circuit 460 may transmit the electrical signal converted from the received audio data to the speaker 461, and convert the electrical signal into a sound signal for output by the speaker 461. The terminal device 400 may also be provided with a volume button for adjusting the volume of the sound signal. On the other hand, the microphone 462 converts the collected sound signal into an electrical signal, converts the electrical signal into audio data after being received by the audio circuit 460, and then outputs the audio data to the RF circuit 410 to be transmitted to, for example, another terminal device, or outputs the audio data to the memory 420 for further processing.

Wi-Fi belongs to short-distance wireless transmission technology, and the terminal device 400 can help a user send and receive e-mails, browse webpages, access streaming media and the like through the Wi-Fi module 470, and provides wireless broadband Internet access for the user.

The processor 480 is a control center of the terminal device 400, connects various parts of the entire terminal device using various interfaces and lines, and performs various functions of the terminal device 400 and processes data by running or executing software programs stored in the memory 420 and calling data stored in the memory 420. In some embodiments, processor 480 may include one or more processing units; the processor 480 may also integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a baseband processor, which primarily handles wireless communications. It will be appreciated that the baseband processor may not be integrated into the processor 480. In the present application, the processor 480 may run an operating system, an application program, a user interface display, a touch response, and the method for eliminating the residual image of the ink screen according to the embodiment of the present application. Further, processor 480 is coupled to display unit 430.

The bluetooth module 481 is configured to perform information interaction with other bluetooth devices having a bluetooth module through a bluetooth protocol. For example, the terminal device 400 may establish a bluetooth connection with a wearable electronic device (e.g., a smart watch) that is also equipped with a bluetooth module through the bluetooth module 481, so as to perform data interaction.

The terminal device 400 also includes a power source 490 (e.g., a battery) for powering the various components. The power supply may be logically coupled to the processor 480 through a power management system to manage charging, discharging, and power consumption through the power management system. The terminal device 400 may also be configured with a power button for powering on and off the terminal device, and for locking the screen.

Fig. 5 is a block diagram of a software configuration of the terminal device 400 according to the embodiment of the present application.

The layered architecture divides the software into several layers, each layer having a clear role and division of labor. The layers communicate with each other through a software interface. In some embodiments, the Android system may be divided into four layers, an application layer, an application framework layer, an Android runtime (Android runtime) and system library, and a kernel layer, from top to bottom, respectively.

The application layer may include a series of application packages.

As shown in fig. 5, the application package may include applications such as camera, gallery, calendar, phone call, map, navigation, WLAN, bluetooth, music, video, short message, etc.

The application framework layer provides an Application Programming Interface (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions.

As shown in FIG. 5, the application framework layers may include a window manager, content provider, view system, phone manager, resource manager, notification manager, and the like.

The window manager is used for managing window programs. The window manager can obtain the size of the display screen, judge whether a status bar exists, lock the screen, intercept the screen and the like.

The content provider is used to store and retrieve data and make it accessible to applications. The data may include video, images, audio, dialed and answered calls, browsing history and bookmarks, phone books, short messages, etc.

The view system includes visual controls such as controls to display text, controls to display pictures, and the like. The view system may be used to build applications. The display interface may be composed of one or more views. For example, the display interface including the short message notification icon may include a view for displaying text and a view for displaying a picture.

The phone manager is used to provide the communication function of the terminal device 400. Such as management of call status (including on, off, etc.).

The resource manager provides various resources, such as localized strings, icons, pictures, layout files, video files, etc., to the application.

The notification manager allows the application to display notification information (e.g., message digest of short message, message content) in the status bar, can be used to convey notification-type messages, and can automatically disappear after a short dwell without user interaction. Such as a notification manager used to inform download completion, message alerts, etc. The notification manager may also be a notification that appears in the form of a chart or scroll bar text at the top status bar of the system, such as a notification of a background running application, or a notification that appears on the screen in the form of a dialog window. For example, text information is prompted in the status bar, a prompt tone is given, the terminal device vibrates, an indicator light flickers, and the like.

The Android Runtime comprises a core library and a virtual machine. The Android runtime is responsible for scheduling and managing an Android system.

The core library comprises two parts: one part is a function which needs to be called by java language, and the other part is a core library of android.

The application layer and the application framework layer run in a virtual machine. And executing java files of the application program layer and the application program framework layer into a binary file by the virtual machine. The virtual machine is used for performing the functions of object life cycle management, stack management, thread management, safety and exception management, garbage collection and the like.

The system library may include a plurality of functional modules. For example: surface managers (surface managers), Media Libraries (Media Libraries), three-dimensional graphics processing Libraries (e.g., OpenGL ES), 2D graphics engines (e.g., SGL), and the like.

The surface manager is used to manage the display subsystem and provide fusion of 2D and 3D layers for multiple applications.

The media library supports a variety of commonly used audio, video format playback and recording, and still image files, among others. The media library may support a variety of audio-video encoding formats, such as: MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, etc.

The three-dimensional graphic processing library is used for realizing three-dimensional graphic drawing, image rendering, synthesis, layer processing and the like.

A 2D (an animation mode) graphics engine is a drawing engine for 2D drawing.

The kernel layer is a layer between hardware and software. The inner core layer at least comprises a display driver, a camera driver, an audio driver and a sensor driver.

The terminal device 400 in the embodiment of the present application may be an electronic device with an ink screen, including but not limited to a mobile phone, a mobile terminal, a desktop computer, a mobile computer, a tablet computer, and the like.

To further illustrate the technical solutions provided by the embodiments of the present application, the following detailed description is made with reference to the accompanying drawings and the detailed description.

Referring to fig. 6, a schematic flowchart of a method for removing an ink screen ghost according to an embodiment of the present application is shown in fig. 6, where the method is applied to a second-order display mode, and includes the following steps:

in step 601, the color values displayed by the pixel points in the multi-frame image are recorded, and the display records of the pixel points are obtained.

In step 602, if it is determined that the pixel needs to be eliminated based on the display record, eliminating the afterimage of the pixel within a specified number of frames displayed later, where the specified number of frames satisfies that a specified color is displayed at the pixel, where the specified color is black if the ground color of the display screen is white, and the specified color is white if the ground color of the display screen is black.

The second-order display mode only displays two colors of black and white, does not display gray, the refreshing time of each frame of image is 120ms, voltage control needs to be executed 10 times for each frame of image, and the single voltage control time is 11.76 ms. The refresh time and the number of times of voltage control and the time of voltage control of each frame of image are generally set by each ink screen manufacturer at the time of shipping the ink screen according to the characteristics of the ink screen and the characteristics of black and white particles.

In a possible implementation manner, in order not to refresh the pixels of the full screen but only refresh the pixels with the afterimage, the color value displayed by each pixel point in each frame of image needs to be observed, and the display state of the pixel point is recorded, so that the pixel point with the afterimage state is determined. Therefore, in the embodiment of the present application, the color value displayed by the pixel point in the multi-frame image needs to be recorded, and the display record of the pixel point is obtained, which can be implemented as follows: recording the color value displayed by the pixel point in each frame of image in the multi-frame of image; if the color value displayed by the pixel point is the designated color, the value of the display record of the pixel point is configured to be a first value; if the color value displayed by the pixel point is the background color of the display screen, accumulating the value of the display record of the pixel point by a second value; the initial value of the display record is a third value, and the third value is used for indicating that the operation of eliminating the ghost shadow is completed.

In a possible embodiment, if the background color of the display screen is white, the display screen may be in a ghost state when a certain pixel appears black, and thus the designated color is black, and if the background color of the display screen is black, the display screen may be in a ghost state when a certain pixel appears white, and thus the designated color is white. In the following, the case that the ground color of the display screen is white, and when a certain pixel appears with a specified color of black, the ground color is a ghost state is described as an example, and if the ground color of the display screen is black, the following steps in various embodiments are not changed, and only the specified color of the pixel needs to be set to white.

In a possible implementation manner, after obtaining the display record of the pixel point in the embodiment of the present application, it needs to determine whether the pixel point needs to eliminate the ghost based on the display record, and the implementation may specifically be:

if the value of the display record of the pixel point is larger than or equal to a preset threshold value, determining that the pixel point needs to eliminate the ghost; and if the value of the display record is smaller than the preset threshold value, determining that the pixel point does not need to eliminate the ghost.

Supposing that there are 1920 × 1080 pixels of the ink screen, because the voltage for controlling the movement of the black and white particles can realize independent control of each pixel, the color display condition of only one pixel needs to be analyzed in the application, and other pixels are similar. Now, suppose that the screen is refreshed at a rate of 120ms for one frame, each pixel in the image is scanned and the display record of the pixel is recorded, as shown in fig. 7, which is a schematic flow chart of recording the display record of the pixel in the first frame image according to the embodiment of the present application. The method can be specifically implemented as the following steps:

in step 701, the initial value of the display record of each pixel point is set to-1.

In step 702, an image frame is input.

In step 703, the next pixel is scanned.

In step 704, the color value of the pixel point is read.

In step 705, it is determined whether the color value of the pixel is black, if so, in step 706, the value of the display record of the pixel is configured to be 0, and then step 712 is executed; if not, in step 707, the value of the display record of the pixel is read.

In step 708, it is determined whether the value of the display record of the pixel point is-1, if yes, step 712 is directly performed; if not, in step 709, 1 is added to the value of the display record of the pixel.

In step 710, determining whether the value of the display record of the pixel point is greater than or equal to a preset threshold, if not, directly executing step 712; if yes, in step 711, it is determined that the pixel point needs to be removed from the ghost.

In step 712, it is determined whether all the pixels have been scanned, if not, the process returns to step 703, and if so, the process ends the scanning of the image of the current frame in step 713.

Wherein, in the above steps, step 701 is only for the first frame image, and when the second frame image is scanned, only step 702 to step 713 need to be executed on the basis of the scanned first frame image.

In one possible implementation, after the pixel has finished removing the afterimage, the corresponding display record is reset to-1, and the display record is changed to 0 again only when the pixel changes to the designated color.

Therefore, the color value of each pixel point displayed in each frame of image in the ink screen can be observed, the display state of each pixel point is recorded, the pixel point in the residual image state can be determined, the residual image can be eliminated for the pixel points in a targeted manner, the problem that the image cannot be normally displayed when the pixel points are refreshed is solved.

In a possible implementation, after determining the pixel points that need to eliminate the residual image, the method can be divided into two methods for eliminating the residual image according to the time of applying the GM sequence:

the GU mode for removing the afterimage aims to complete the operation of removing the afterimage within the time of synthesizing one frame of image, and another GM voltage control sequence mode (GM mode for short) for removing the afterimage is proposed in the embodiment of the present application. It is mentioned in the foregoing that, the longer the voltage sequence is applied, the higher the proportion of black and white particles reaching the correct position, and the better the ink screen display effect, compared to GU mode, GM mode does not apply enough voltage to the pixel points in the time of synthesizing one frame of image, but completes the operation of removing the residual image in the time of synthesizing multiple frames of image, so that 2 times or more voltage control sequence can be applied. In the following, taking the example of applying M times voltage control sequence, assuming that the average gray scale of the residual image of the ink screen is G%, the first frame is in G% gray scale direction

A gray scale application voltage sequence, the second frame being in accordance with

Direction of gray scale

The grayscale applied voltage sequence is according to the Nth (N is less than or equal to M) frame

Direction of gray scale

Gray scale application voltage sequence。

For example, in an ideal case, the gray scale displayed when all the black particles are at the extreme position of the upper layer of the screen is i 00%, and the gray scale displayed when all the white particles are at the extreme position of the upper layer of the screen is 0%. Assuming that the average gray level of the afterimage of the ink screen is 5%, it is now required to apply 5 times of the voltage sequence, it can be calculated that it is required to apply the voltage sequence to 4% gray level according to 5% gray level for the first frame image, to apply the voltage sequence to 3% gray level according to 4% gray level for the second frame image, to apply the voltage sequence to 2% gray level according to 3% gray level for the third frame image, to apply the voltage sequence to 1% gray level according to 2% gray level for the fourth frame image, to apply the voltage sequence to 0% gray level according to 1% gray level for the fifth frame image, for 5 times in total, and the voltage sequence required to be applied for each percentage change is the best voltage sequence tested in advance, which can be obtained by looking up the table in the waveform. Then the 5 voltage sequences are combined to complete a complete GM voltage sequence.

If M is 10, then the voltage sequence needs to be applied from 5% to 4.5%, 4.5% to 4%. however, waveform is not so finely divided, so the value theory of M should be such that the applied voltage sequence required for each percentage change is data-visible.

1) Instant residual image removing

The basic concept of removing the ghost immediately is to judge whether the value of the display record corresponding to each pixel point is greater than or equal to a preset threshold value or not for each pixel point in each frame of image, and if the value of the display record corresponding to one pixel point is greater than or equal to the preset threshold value, immediately applying a GM sequence to the pixel point so as to remove the ghost of the pixel point in a specified frame number displayed later.

In a possible implementation manner, when the specified frame number is not reached and the afterimage of the pixel point is not completely eliminated, if the pixel point redisplays the specified color based on the content to be displayed, the display record of the pixel point is set to the first value, and the operation of eliminating the afterimage of the pixel point is finished.

If the GM sequence is not completely applied and the pixel point needs to be displayed as black again, resetting the display record corresponding to the pixel point to 0 and stopping applying the GM sequence; and if the GM sequence is applied, resetting the display record corresponding to the pixel point to-1, and starting to clear the residual image of the next pixel point.

In a possible embodiment, the operation of instant removing the ghost of a single pixel point is shown in fig. 8, and includes the following steps:

in step 801, the GM sequence application multiple M is read and the average afterimage gray level G is read.

In step 802, the pixels that need to be eliminated with ghost are searched.

In step 803, a GM sequence is applied.

In step 804, determining whether the GM sequence is applied, if so, resetting the display record corresponding to the pixel point to-1 in step 805, and then executing step 809; if not, then in step 806, the next frame of image is waited for.

In step 807, determining whether the pixel in the next frame of image is black, if not, returning to step 803; if yes, in step 808, the display record corresponding to the pixel point is reset to 0.

In step 809, the operation of removing the ghost is ended.

In another possible implementation manner, because the GM mode provided in this embodiment of the present application is to complete the operation of removing the afterimage in the time of synthesizing the multi-frame image, in order to avoid a situation that the operation time length of not reaching the specified frame number and not completing the operation of removing the afterimage does not synthesize the image frame, this embodiment of the present application further sets a preset time, and counts the preset time by using a timer, that is, in this embodiment of the present application, the method specifically includes:

if the number of the appointed frames is not reached and no new image frame is received within the preset time, continuously eliminating the ghost of the pixel point in the current image frame, namely no new image frame is synthesized after the timing of the timer is finished, immediately adopting a frame interpolation method, namely continuously synthesizing the current image frame and continuously applying the GM sequence until the pixel point finishes the operation of eliminating the ghost; and if the specified frame number is not reached and a new image frame is generated within the preset time, eliminating the ghost of the pixel point in the new image frame, namely using the new image frame to continuously trigger the GM sequence.

As shown in fig. 9, another operation of instant removing ghost of a single pixel point includes the following steps:

in step 901, the GM sequence application multiple M is read and the average gray level G of the afterimage is read.

In step 902, the pixel points that need to be eliminated with the ghost are searched.

In step 903, a GM sequence is applied.

In step 904, determining whether the GM sequence is applied, if so, in step 905, resetting the display record corresponding to the pixel point to-1, and then performing step 911;

if the application is not completed, it is determined whether an image frame arrives in step 906, and if so, the timer thread is stopped in step 907 (if the timer thread executes the step, if the timer thread does not ignore the step), and then step 909 is executed; if not, in step 908, a timer thread is started. Wherein, in the timer thread, the following steps are performed:

in step S801, a timeout time is set. In step S802, it is determined whether the timer has timed out, and if it has timed out, in step S803, the current image frame is synthesized at a certain refresh frequency, and then step 909 is executed; if not, the process returns to step S802.

In step 909, determining whether the pixel in the next frame image is black, if not, returning to execute step 903; if yes, in step 910, the display record corresponding to the pixel point is reset to 0.

In step 911, the operation of removing the ghost is finished.

2) Alignment for removing residual image

In a possible implementation manner, in addition to immediately applying the GM sequence to the pixel after determining that the pixel needs to eliminate the residual image, the embodiment of the present application may also adopt a manner of aligning and eliminating the residual image. The basic concept of alignment elimination of the ghost is that before eliminating the ghost of the pixel in a specified frame number, the pixel needing to eliminate the ghost in the display screen is marked, the proportion of the currently marked pixel in all the pixels in a frame of image is calculated in real time, and a proportion threshold is set; if the proportion is larger than or equal to the proportion threshold value, the marked pixel points are combined into a dynamic non-increased pixel group (dynamic pixel group for short), then a GM sequence is applied to any pixel point marked as needing to eliminate the residual image in the pixel group, and the operation of eliminating the residual image of the pixel point in a specified frame number is executed.

Any pixel point in the pixel group is in a state of needing to be cleared of residual images as long as being marked, and time sequence is not distinguished, so that all pixel points are processed in parallel.

In a possible implementation manner, when the specified number of frames is not reached and the afterimage of the pixel point is not completely eliminated, if the pixel point redisplays the specified color based on the content to be displayed, the display record of the pixel point is set to the first value, and the operation of eliminating the afterimage of the pixel point is finished.

If the GM sequence is not completely applied and a pixel point in the pixel group needs to be redisplayed as black, resetting the display record corresponding to the pixel point to 0, and deleting the pixel point from the pixel group; and if the GM sequence is applied, resetting the display records corresponding to all the pixel points in the pixel group to-1, and starting the next round of operations of generating the dynamic pixel group and clearing the ghost.

After a dynamic pixel group is generated, if a new marked pixel point is not added to the dynamic pixel group, a dynamic pixel group is generated again after the marked pixel point reaches the proportion threshold value again.

In a possible implementation manner, because the GM mode provided in this embodiment of the present application is to complete the operation of removing the afterimage in the time of synthesizing the multi-frame image, in order to avoid a situation that the operation time length of not reaching the specified frame number and not completing the operation of removing the afterimage does not synthesize the image frame, this embodiment of the present application further sets a preset time, and counts the time by using a timer, that is, in this embodiment of the present application, the method specifically includes:

if the number of the appointed frames is not reached and a new image frame is not received within the preset time, continuously eliminating the ghost of the pixel point in the current image frame; and if the number of the appointed frames is not reached and a new image frame is generated within the preset time, eliminating the ghost of the pixel point in the new image frame.

The method can be implemented in such a way that no new image frame is synthesized after the timing of the timer is finished, the frame interpolation method is immediately adopted, namely, the current image frame is continuously synthesized, and the GM sequence is continuously applied until all pixel points in the pixel group finish the operation of removing the ghost; and if the specified frame number is not reached and a new image frame is generated within the preset time, eliminating the ghost of the pixel point in the new image frame, namely using the new image frame to continuously trigger the GM sequence.

In one possible implementation, the operation of dynamically aligning the unchanged pixel groups to remove the afterimage is shown in fig. 10, and includes the following steps:

in step 1001, the GM sequence application multiple M is read, and the afterimage average gradation G is read.

In step 1002, the pixels that need to eliminate the ghost are searched for, and a dynamic pixel group is established.

In step 1003, a GM sequence is applied.

In step 1004, determining whether the GM sequence is applied, if so, resetting the display records corresponding to all the pixels to-1 in step 1005, and then performing step 1012;

if the application is not completed, in step 1006, it is determined whether an image frame arrives, if so, in step 1007, the timer thread is stopped (if the timer thread executes the step, if the timer thread does not ignore the step), and then step 1009 is executed; if not, then in step 1008, a timer thread is started. Wherein, in the timer thread, the following steps are performed:

in step S01, a timeout time is set. In step S02, it is determined whether the timer has timed out, and if yes, in step S03, the current image frame is synthesized at a certain refresh frequency, and then step 1009 is executed; if not, the process returns to step S02.

In step 1009, it is determined whether there is a black pixel in the pixel group in the next frame of image, and if not, the step 1003 is executed again; if yes, in step 1010, the pixel points are deleted from the pixel group, and the display records corresponding to the pixel points are reset to 0.

In step 1011, it is determined whether the dynamic pixel set is empty, and if not, the process returns to step 1003; if empty, the timer thread is stopped (if there is a timer thread to perform this step, if there is no timer thread to ignore this step) in step 1012.

In step 1013, the operation of removing the afterimage is ended.

Therefore, the residual shadow can be removed immediately, the pixel points needing to be removed of the residual shadow can be processed in time, the pixel points are independent, the residual shadow can be removed in an aligned mode, the pixel points needing to be removed of the residual shadow can be processed in a unified mode, when the number of the pixel points needing to be removed of the residual shadow is too large, the pressure of a processor can be relieved, and the residual shadow removing efficiency is improved.

Based on the foregoing description, in the embodiment of the present application, a display record of a pixel point is obtained by recording a color value displayed by the pixel point in a multi-frame image; if it is determined that the pixel points need to eliminate the residual shadows based on the display records, the residual shadows of the pixel points are eliminated within a specified number of frames displayed later, the specified number of frames meets the requirement that specified colors are displayed at the pixel points, wherein the specified colors are black if the ground color of the display screen is white, and the specified colors are white if the ground color of the display screen is black, so that the pixels with the residual shadows can be automatically refreshed under the state that a user does not perceive or perceives weakly, the residual shadows of the ink screen are reduced or even eliminated, and the reading and using experience of the user is improved.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus (system), or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for eliminating the afterimage of an ink screen is applied to a second-order display mode, and comprises the following steps:

2. The method of claim 1, wherein said recording color values of pixels displayed in a plurality of frames of images to obtain a display record of the pixels comprises:

3. The method according to claim 2, wherein determining whether the pixel points need to eliminate the afterimage based on the display record specifically comprises:

4. The method of claim 1, wherein after determining that the pixel point needs to be ghosted based on the display record and before removing the ghosting of the pixel point within a specified number of frames, the method further comprises:

5. The method of claim 2, further comprising:

6. The method of claim 1, wherein eliminating the afterimage of the pixel within a specified number of frames to be displayed later comprises:

7. The method of claim 2, further comprising:

8. A terminal device, comprising:

a display, a processor, and a memory;

the display is used for displaying information;

the memory to store the processor-executable instructions;

the processor is configured to execute the instructions to implement the method for eliminating the ink screen ghost according to any one of claims 1-7.

9. A computer-readable storage medium, comprising:

the instructions in the computer-readable storage medium, when executed by the terminal device, enable the terminal device to perform the method of eliminating ink screen ghosting as claimed in any one of claims 1 to 7.

10. A computer program product, comprising:

a computer program;

the computer program, when executed by a processor, implements the method of eliminating ink screen ghosting as recited in any one of claims 1 to 7.