Electronic ink screen display

Abstract

The present disclosure provides an electronic ink screen display, comprising: an electronic ink screen configured to display a video picture, and comprising microcapsules encapsulating colored particles, and electrodes for applying voltage to the microcapsules; a display controller configured to process received video data in units of pixels or a pixel group comprising a plurality of pixels so as to obtain video data to be displayed, generate drive data on the basis of the video data to be displayed, and send the drive data to the electronic ink screen, so that the electronic ink screen drives, on the basis of the drive data, the electrodes to apply voltage at most once to the microcapsules corresponding to pixels associated with the video data to be displayed; and a video processor configured to receive, from a video source, video source data comprising a plurality of frames, convert the video source data into video data adapted to be displayed on the electronic ink screen, and provide the video data to the display controller. Therefore, the refresh time of each picture frame in a video can be significantly reduced, and the overall video picture quality is maintained at a high level, thereby achieving an excellent display effect.

Description

Electronic ink screen display

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to Chinese Patent Application No. 202411323841.6, filed on September 20, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present invention relates to displays, and in particular to electronic ink screen displays. BACKGROUND

[0004] Electronic paper display (EPD) is a technology that displays by means of ambient light. For example, the EPD display technology can encapsulate black and white color particles in a microcapsule structure, and control the up-and-down movement of different charged black and white particles by an applied electric field to present a black-and-white monochrome display effect. Under the action of the electric field, the two different particles keep moving. When the white particles rise to the upper surface, all ambient light shining on the upper surface is completely reflected, thus forming a white state, i.e., a paper state. When the electrodes are exchanged, the two colors of particles will exchange positions, so that the white particles can go to the lower surface, and the black particles go to the upper surface. The light is completely absorbed by the black particles, resulting in black, i.e., a black-and-white display. In addition, there can also be a mixed state on the upper surface, in which the two different particles are mixed in proportion, thus forming different colors with black-and-white and gray levels. Similarly, for microcapsules with one or more color particles such as black, white, red, yellow, etc., various color particles can also be moved by applying an electric field, thus presenting different colors.

[0005] Due to the high reflectivity and high-contrast black-and-white display effect of the EPD technology, it also has a memory effect. When the applied electric field is removed, the current display is immediately displayed, just like the content displayed on a printed paper. Due to the bistability, the image is retained on the EPD display screen for several months or years after the power electric field is removed. This technology can achieve reflective display by means of ambient light, similar to the printing display effect of ordinary paper. Therefore, compared with traditional display screens such as CRT, LED, LCD, OLED, etc., which are self-luminous, the EPD display screen is less likely to cause eye fatigue, and long-term staring will not damage the retina. In addition, the EPD display screen also has the advantages of low power consumption and energy saving. Currently, the EPD technology is usually applied to handheld electronic reader devices such as electronic books.

[0006] However, various devices using the EPD display screen of the related art have poor display effect when playing video pictures. SUMMARY

[0007] The purpose of the present disclosure is to provide an electronic ink screen display based on which the refresh speed of each frame in a video can be greatly improved by applying a driving voltage to each microcapsule corresponding to each pixel of the electronic ink screen at most once when displaying a frame in the video, while maintaining the picture quality of the video as a whole at a high level, thereby overcoming the poor display effect of the electronic ink screen of the related art when playing a video.

[0008] According to a first aspect of the present disclosure, an electronic ink screen display is provided, comprising:

[0009] an electronic ink screen for displaying a video picture, and comprising microcapsules encapsulating color particles, electrodes above and below the microcapsules for applying a voltage to the microcapsules to drive the color particles;

[0010] a display controller for processing received video data in units of pixels or pixel groups comprising a plurality of pixels to obtain to-be-displayed video data, generating driving data based on the to-be-displayed video data and sending the driving data to the electronic ink screen, so that the electronic ink screen drives the electrodes to apply a voltage at most once to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data based on the driving data;

[0011] a video processor for receiving video source data comprising a plurality of frames from a video source at a preset frame rate, and converting the video source data into video data suitable for display on the electronic ink screen, and providing the video data to the display controller in units of pixels or pixel groups.

[0012] According to a second aspect of the present disclosure, the display controller arranges the received video data in sequence in units of pixels or pixel groups, and packs as a video data packet as to-be-displayed video data, and generates driving data based on the video data packet and sends the driving data to the electronic ink screen whenever a video data packet is packed, so that the electronic ink screen drives the electrodes to apply a voltage at most once to the microcapsules corresponding to one or more pixels corresponding to the video data packet based on the driving data, thereby completing the display of one or more pixels corresponding to the to-be-displayed video data.

[0013] According to a third aspect of the present disclosure, the electronic ink screen display further comprises:

[0014] a frame data storage for storing first video data of a current frame which is currently displayed on the electronic ink screen and has been completed display, and second video data of a previous frame which has been completed display on the electronic ink screen and has not been replaced by the video data of the current frame, wherein the second video data comprises third video data, the pixels corresponding to the third video data are the same position pixels as the pixels corresponding to the to-be-displayed video data in the frame thereof,

[0015] wherein the display controller compares the to-be-displayed video data with the third video data, and outputs a comparison result, and generates driving data based on the comparison result, wherein if the comparison result is different, the generated driving data instructs the electronic ink screen to drive the electrodes to apply a voltage to the microcapsule corresponding to one or more pixels corresponding to the to-be-displayed video data once; if the comparison result is the same, the generated driving data instructs the electronic ink screen to drive the electrodes to re-apply a voltage in the manner of applying a previous voltage once.

[0016] According to a fourth aspect of the present disclosure, if the comparison result is the same, and the number of consecutive applied voltages of the driving data generated by the display controller instructing the electronic ink screen to drive the electrodes to re-apply a voltage in the manner of applying a previous voltage once reaches a preset threshold, the generated driving data instructs the electronic ink screen not to drive the electrodes.

[0017] According to a fifth aspect of the present disclosure, the display controller comprises:

[0018] a display engine for reading the third video data from the second video data stored in the frame data storage based on the index of the pixels corresponding to the to-be-displayed video data in the frame thereof, comparing the to-be-displayed video data with the read third video data, and outputting a comparison result;

[0019] a driving data output module for generating the driving data according to the comparison result and sending to the electronic ink screen;

[0020] a pixel data buffer for buffering the video data received from the video processor in units of pixels or the pixel groups, collating the received video data in order, and packing as a video data packet as to-be-displayed video data, and providing to the display engine as soon as a video data packet is packed.

[0021] According to a sixth aspect of the present disclosure, the display engine writes the to-be-displayed video data into the frame data storage to replace the third video data in the second video data as part of the first video data.

[0022] According to a seventh aspect of the present disclosure, the display engine writes only the video data to be displayed and the video data in the third video data which are different for the same pixel into the frame data memory according to the comparison result, and keeps the video data in the third video data which are the same for the same pixel, thereby completing the replacement of the third video data and serving as a part of the first video data.

[0023] According to an eighth aspect of the present disclosure, the duration of the time that the electronic ink screen drives the electrode to apply a voltage is not more than the duration of a frame of video picture corresponding to the frame rate.

[0024] According to a ninth aspect of the present disclosure, the preset frame rate is set to be consistent with the frame rate of the electronic ink screen display to display a video picture.

[0025] According to a tenth aspect of the present disclosure, the video processor receives video source data including a plurality of frames from a video source in a manner of a video stream in units of pixels or the pixel groups at a preset frame rate, converts the video source data into video data with corresponding attributes suitable for display on the electronic ink screen in units of pixels or the pixel groups in sequence, and provides the video data with corresponding attributes to the display controller in units of pixels or the pixel groups in sequence.

[0026] The present disclosure has the following beneficial effects:

[0027] In an electronic ink screen display according to one embodiment of the present disclosure, by the electronic ink screen, which is used to display video pictures, and which comprises microcapsules encapsulating color particles, electrodes above and below the microcapsules for applying voltage to the microcapsules to drive the color particles; a display controller, which is used to process received video data in units of pixels or pixel groups comprising multiple pixels to obtain to-be-displayed video data, generate driving data based on the to-be-displayed video data and send to the electronic ink screen, so that the electronic ink screen drives the electrodes to apply at most one voltage to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data based on the driving data; a video processor, which is used to receive video source data comprising multiple frames from a video source at a preset frame rate, and convert the video source data into video data suitable for display on the electronic ink screen, and provide the video data to the display controller in units of pixels or the pixel groups, and at most one voltage can be applied to the microcapsules corresponding to one or more pixels of to-be-displayed video data of each frame in the video, which greatly reduces the refresh time of each frame picture in the video, so that video display can be performed by the electronic ink screen at a preset frame rate, that is, the refresh frequency of the electronic ink screen is consistent with the frame rate of the video input to the electronic ink screen, even achieving video display at the limit refresh frequency of the electronic ink screen itself, and the picture quality of the video as a whole can be maintained at a high level while video display is performed by the electronic ink screen at a preset frame rate, thereby obtaining good display effect.

[0028] In an electronic ink screen display according to one embodiment of the present disclosure, the display controller sequentially arranges received video data in units of pixels or the pixel groups, and packs as a video data packet as to-be-displayed video data, and generates driving data based on the video data packet and sends to the electronic ink screen every time a video data packet is packed, so that the electronic ink screen drives the electrodes to apply at most one voltage to the microcapsules corresponding to one or more pixels corresponding to the video data packet based on the driving data, thereby completing the display of one or more pixels corresponding to the to-be-displayed video data, which can make the driving data provided by the display controller better match the inherent performance of the electronic ink screen, so that the refresh time of each frame picture in the video can be further reduced, and the video picture quality can be further improved as a whole while video display is performed by the electronic ink screen at a preset frame rate, thereby obtaining good display effect.

[0029] In an electronic ink screen display according to one embodiment of the present disclosure, by a frame data storage, which is used to store first video data of a current frame that is currently displayed on the electronic ink screen and has completed display, and second video data of a previous frame that has completed full display and has not been replaced by the video data of the current frame, which is currently displayed on the electronic ink screen, wherein the second video data includes third video data, the pixels corresponding to the third video data and the pixels corresponding to the to-be-displayed video data in the frame to which the to-be-displayed video data belongs are the same position pixels, wherein the display controller compares the to-be-displayed video data and the third video data, and outputs the comparison result, and generates driving data based on the comparison result, wherein if the comparison result is different, the generated driving data instructs the electronic ink screen to drive the electrodes to apply a voltage to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data; if the comparison result is the same, the generated driving data instructs the electronic ink screen to drive the electrodes to re-apply a voltage in the manner of applying a previous voltage, and the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data can be applied with a voltage in different ways when the to-be-displayed video data is the same as or different from the third video data when the electronic ink screen is refreshed, thereby reducing the refresh time of each frame of the video, while the overall picture quality of the video can be maintained at a high level, thereby achieving good display effect.

[0030] In an electronic ink screen display according to one embodiment of the present disclosure, if the comparison result is the same, and the number of consecutive voltage applications reaches a preset threshold value, the generated driving data instructs the electronic ink screen not to drive the electrodes, so that the power consumption can be reduced as much as possible while the video is displayed on the electronic ink screen at a preset frame rate, the service life of the corresponding components of the electronic ink screen is maintained, and the power consumption of the electronic ink screen display is reduced and the service life of the electronic ink screen display is improved.

[0031] In the electronic ink screen display according to one embodiment of the present disclosure, the display controller comprises: a display engine configured to read the third video data from the second video data stored in the frame data storage based on the index of the pixel corresponding to the to-be-displayed video data in the frame to which the to-be-displayed video data belongs, compare the to-be-displayed video data with the read third video data, and output a comparison result; a driving data output module configured to generate the driving data according to the comparison result and send the driving data to the electronic ink screen; and a pixel data buffer configured to buffer the video data received from the video processor in units of pixels or pixel groups, arrange the received video data in sequence, and pack the video data as a video data packet as the to-be-displayed video data, and provide the to-be-displayed video data to the display engine as soon as a video data packet is packed. The display controller can be implemented in a proper structure, the video data processing speed of the electronic ink screen display is improved, and in the case that the to-be-displayed video data is the same as or different from the third video data, the electronic ink screen is driven in a proper manner to refresh, so that the refresh time of each frame of the video is reduced, the picture quality of the entire video can be maintained at a high level, and good display effect is achieved.

[0032] In the electronic ink screen display according to one embodiment of the present disclosure, the display engine writes the to-be-displayed video data into the frame data storage to replace the third video data in the second video data as part of the first video data, so that the video data stored in the frame data storage can be updated in time, the display engine can accurately compare the third video data with the to-be-displayed video data, the reliability of the driving data provided by the display controller is ensured, and the display effect of the electronic ink screen display is ensured.

[0033] In the electronic ink screen display according to one embodiment of the present disclosure, the display engine writes the to-be-displayed video data into the frame data storage to replace the third video data in the second video data as part of the first video data, so that the video data stored in the frame data storage can be updated in time, the display engine can accurately compare the third video data with the to-be-displayed video data, the reliability of the driving data provided by the display controller is ensured, and the display effect of the electronic ink screen display is ensured.

[0034] In the electronic ink screen display according to one embodiment of the present disclosure, the duration of the voltage applied to the electrodes by the electronic ink screen is not more than the duration of one frame of video corresponding to the frame rate, so that the color particles in the microcapsules can be driven by appropriate voltage while video display is performed on the electronic ink screen at the preset frame rate, thereby maintaining the picture quality of the video as a whole at a high level and achieving good display effect.

[0035] In the electronic ink screen display according to one embodiment of the present disclosure, the preset frame rate is set to be consistent with the frame rate of the video displayed by the electronic ink screen display, so that the preset frame rate can be set based on the performance of the electronic ink screen display itself, and the refresh frequency of the electronic ink screen has good matching degree with the frame rate of the video input to the electronic ink screen display, thereby achieving good display effect.

[0036] In the electronic ink screen display according to one embodiment of the present disclosure, the video processor receives video source data including multiple frames from the video source in the form of video stream in units of pixels or the pixel groups at the preset frame rate, and sequentially converts the video source data into video data with corresponding attributes suitable for display on the electronic ink screen in units of pixels or the pixel groups, and sequentially provides the video data with corresponding attributes to the display controller, so that the display controller controls the electronic ink screen to display the video picture represented by the video source data in real time, i.e., display the video stream in real time, and during the display of the video stream, the picture quality of the video as a whole can be maintained at a high level due to the appropriate attributes of the video data, thereby achieving good display effect. BRIEF DESCRIPTION OF DRAWINGS

[0037] FIG. 1 is a schematic block diagram of an electronic ink screen display according to one embodiment of the present disclosure.

[0038] FIG. 2 shows an exemplary structural diagram of the video processor 130 in the electronic ink screen display 100 of FIG. 1 according to an embodiment of the present disclosure.

[0039] FIG. 3A exemplarily shows a conceptual diagram of the movement of color particles in microcapsules in an electronic ink display screen in the related art when displaying one frame of image completely.

[0040] FIG. 3B exemplarily shows a conceptual diagram of the movement of color particles in microcapsules in an electronic ink display screen according to an embodiment of the present disclosure when displaying two frames of image continuously.

[0041] FIG. 4 shows a schematic block diagram of an electronic ink screen display according to another embodiment of the present disclosure.

[0042] FIG. 5 shows an exemplary schematic diagram of an example of video data stored in the frame data storage 410 in an embodiment of the present disclosure.

[0043] FIG. 6 shows an exemplary structural diagram of the display controller 120 in the electronic ink screen display 400 shown in FIG. 4. DETAILED DESCRIPTION

[0044] For the purposes of the present disclosure, the technical solutions and advantages are more clearly apparent, the present disclosure is further described in detail below with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present disclosure. In addition, in the following description, the description of some known structures and technologies is omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0045] In an embodiment of the present disclosure, the microcapsule structure in the electronic ink screen can also be implemented as a microcup structure, which can be understood from the related art, and the present disclosure omits the discussion of the electronic ink screen including the microcup structure.

[0046] When the electronic ink screen in the related art performs video display, due to the characteristics of the electronic ink screen itself, the color particles in the microcapsule cannot reach the target position (e.g., the top end, the bottom end, or other specific positions of the capsule) under the driving of the voltage at one time, so the display of the frame image cannot be completed by only one refresh. Specifically, the color particles cannot be driven to reach the target position in the microcapsule required for displaying the frame image by only one movement through the application of voltage once. Therefore, the driving scheme of the electronic ink screen in the related art is that, after receiving the video data from the video source, in order to display a frame image, the voltage needs to be applied multiple times to drive the color particles in the microcapsule to move multiple times to achieve clear and complete display of the frame image. For example, in the refresh mode of the related art, in order to display a frame image, the voltage needs to be applied 4 to 16 times to drive the color particles in the microcapsule to move 4 to 16 times, so that the color particles can reach the target position in the microcapsule.

[0047] Moreover, in the related art, in the manner of applying multiple voltages to drive the color particles to move multiple times, the refresh speed of the electronic ink screen is relatively low. In one example, the refresh mode of the electronic ink screen in the related art is to output a 40Hz video, but since 4 to 16 voltages are usually applied in succession to drive the color particles to move from the initial position to the target position to complete the refresh each time the frame image is updated, in fact, the electronic ink screen usually displays only 7 to 10 frames per second. Obviously, when the user performs operations such as moving the mouse, scrolling the webpage, playing the video, etc. on the electronic ink screen, which have a higher requirement for the refresh speed, it will be found that the displayed content has a phenomenon of lag.

[0048] From one perspective, this is due to the characteristics of the electronic ink screen itself.

[0049] From another perspective, this may be due to the inherent cognition of those skilled in the art. That is, in the field of electronic ink screens, when displaying a frame of a video (for example, a movie), as with displaying a static image (for example, a page of an electronic book), multiple applications of voltage are required to drive the color particles in the microcapsules multiple times to achieve clear and complete display of each frame, that is, the color particles are moved to the target position in the microcapsules.

[0050] Based on this cognition, even if those skilled in the art display a video using an electronic ink screen, the same frame of image is refreshed multiple times on the entire screen each time a frame of image is displayed, that is, after refreshing a frame of image once, the same frame of image is refreshed multiple times. This leads to further cognition of those skilled in the art that, due to the long refresh time of the electronic ink screen for displaying a frame of image, the electronic ink screen is suitable for displaying static images but not suitable for displaying videos. In the related art, various refresh modes for displaying a video using an electronic ink screen have been conceived by those skilled in the art. However, in the related art, the refresh mode for each frame of a video proposed by those skilled in the art is different from the refresh mode for a static image only in terms of refresh speed, refresh gray scale, and the like, which are not substantial differences. In fact, both are multiple applications of voltage to drive the color particles in the microcapsules to the target position multiple times for complete display of a frame of image. Moreover, even if the refresh mode for improving the refresh speed of the electronic ink screen is mentioned in the related art, the refresh speed is improved by compressing the refresh time for displaying a frame of image as a whole, that is, reducing the duration of each application of voltage in the process of multiple applications of voltage, but not by reducing the number of applications of voltage to at most once to drive the movement of the color particles in the microcapsules at most once. Moreover, in the case of improving the refresh speed by compressing the refresh time for displaying a frame of image as a whole, the overall picture quality of the video, such as definition, gray scale, and ghosting, is degraded.

[0051] To overcome the deficiencies in the related art, the embodiments of the present disclosure provide an electronic ink screen display that can greatly improve the refresh speed of each frame of a video by applying at most one driving voltage to each microcapsule corresponding to each pixel of the electronic ink screen when displaying a frame of picture in the video, while maintaining the overall picture quality of the video at a high level, thereby overcoming the poor display effect of the electronic ink screen of the related art when playing a video picture.

[0052] FIG. 1 is a schematic block diagram of an electronic ink screen display according to an embodiment of the present disclosure.

[0053] As shown in FIG. 1, the electronic ink screen display 100 includes an electronic ink screen 110, a display controller 120 and a video processor 130. The electronic ink screen 110 is used to display video pictures, and it includes microcapsules encapsulating color particles, electrodes above and below the microcapsules for applying voltage to the microcapsules to drive the color particles. The display controller 120 is used to process received video data in units of pixels or pixel groups including multiple pixels to obtain to-be-displayed video data, generate driving data based on the to-be-displayed video data and send to the electronic ink screen 110 to control the electronic ink screen 110 to drive the electrodes to apply voltage to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data at most once. The video processor 130 receives video source data including multiple frames from a video source at a preset frame rate, and converts the video source data into video data suitable for display on the electronic ink screen, and provides the video data to the display controller in units of pixels or the pixel groups.

[0054] In the embodiments of the present disclosure, the structure of the electronic ink screen 110 is to adopt an electronic ink screen known in the related art, and thus the microcapsules, the color particles in the microcapsules, and the electrodes above and below the microcapsules thereof can be known from the related art. In the embodiments of the present disclosure, the color particles can include charged particles and / or uncharged particles, which can be known from the related art. However, the color particles mentioned in the present disclosure that can be driven by voltage are all charged particles. In addition, the electronic ink screen 110 in the embodiments of the present disclosure can also include modules for power supply control, timing control and the like functions, which can all be obtained from the related art. Therefore, the specific structure of the electronic ink screen 110 is not described in detail in the present disclosure.

[0055] In the embodiments of the present disclosure, the video source (not shown in the figure) can be located outside the electronic ink screen display, and exist independently of the electronic ink screen display 100, or can be located inside the electronic ink screen display 100. The video source can provide video source data to the electronic ink screen display 100 through MIPI (Mobile Industry Processor Interface), HDMI (High-Definition Multimedia Interface), DP (DisplayPort), Edp (Embedded DisplayPort) and the like. Moreover, the video source can be a wireless signal receiver, or a wired signal receiver, or an analog-to-digital conversion device, or a separate storage device, and the like, which are not limited in the present disclosure.

[0056] In an embodiment of the present disclosure, the preset frame rate refers to the speed at which the video processor 130 receives the video source data from the video source, in units of frames per second. The conversion of the video source data into video data suitable for display on the e-ink screen 110 refers to the fact that, due to the resolution, brightness, grayscale, and other attributes of the video source data obtained from the video source, the video source data is not necessarily suitable for display on the e-ink screen 110, and thus needs to be converted. After the attribute conversion, the video data obtained is suitable for display on the e-ink screen 110. Moreover, the converted video data can be provided to the display controller 120 in units of pixels or groups of pixels. In this way, the video processor 130 does not need to process a large amount of data at one time, but can receive, process, and provide the video source data to the display controller 120 in real time at an appropriate speed.

[0057] In an e-ink screen display according to an embodiment of the present disclosure, the e-ink screen is used to display a video image, and includes microcapsules encapsulating color particles, electrodes above and below the microcapsules for applying a voltage to the microcapsules to drive the color particles; a display controller for processing received video data in units of pixels or groups of pixels including a plurality of pixels to obtain to-be-displayed video data, generating driving data based on the to-be-displayed video data and sending the driving data to the e-ink screen, so that the e-ink screen drives the electrodes to apply a voltage at most once to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data based on the driving data; and a video processor for receiving video source data including a plurality of frames from a video source at a preset frame rate, and converting the video source data into video data suitable for display on the e-ink screen, and providing the video data to the display controller in units of pixels or groups of pixels. The voltage can be applied at most once to the microcapsules corresponding to one or more pixels of the to-be-displayed video data of each frame of the video, which greatly reduces the refresh time of each frame of the video image, so that the video can be displayed on the e-ink screen at the preset frame rate, that is, the refresh frequency of the e-ink screen is consistent with the frame rate of the video input to the e-ink screen display, and even the video can be displayed on the e-ink screen at the limit refresh frequency of the e-ink screen itself, and the image quality of the video as a whole can be maintained at a high level while the video is displayed on the e-ink screen at the preset frame rate, thereby achieving good display effect.

[0058] In an embodiment of the present disclosure, the preset frame rate is set to be consistent with the frame rate at which the electronic ink screen display 100 displays a video picture. For example, if the frame rate (also referred to as refresh rate) at which the electronic ink screen display 100 displays a video picture is 40 Hz (i.e., 40 frames per second), the preset frame rate at which the video processor 130 receives video source data from the video source can be set to 40 Hz based on the refresh rate. Moreover, by this setting, on the one hand, the input video (or video stream) is facilitated to be processed in real time (or real-time processing) and displayed in real time (or real-time display). On the other hand, since a higher processing capability is required for receiving, processing, or displaying a large amount of video data at the same time, which increases the overall cost of the electronic ink screen display and may affect the reliability of the electronic ink screen display, the electronic ink screen display in the embodiment of the present disclosure processes and displays the video in units of a single pixel or a pixel group, which facilitates the real-time processing and real-time display of the video, controls the product manufacturing cost at a reasonable level, and ensures the reliability of the electronic ink screen display. In an embodiment of the present disclosure, the video processor 130 learns the refresh rate of the electronic ink screen 110 and notifies the video source of the refresh rate, and the video source sets the frame rate at which the video source data is sent to be consistent with the refresh rate. It should be understood that the preset frame rate is set to 40 Hz only as an example, and any value of the preset frame rate that is consistent with the refresh rate of the electronic ink screen display 100 can be set as long as it does not exceed the refresh rate limit of the electronic ink screen 110 and meets the smoothness requirement of video display.

[0059] In the electronic ink screen display according to an embodiment of the present disclosure, by setting the preset frame rate to be consistent with the frame rate at which the electronic ink screen display displays a video picture, the preset frame rate can be set based on the performance of the electronic ink screen display itself, so that the refresh frequency of the electronic ink screen and the frame rate of the video input to the electronic ink screen display have good matching degree, thereby obtaining good display effect.

[0060] In the electronic ink screen display 100 in an embodiment of the present disclosure, the video processor 130 receives video source data including a plurality of frames from the video source in units of pixels or pixel groups in the form of a video stream at a preset frame rate, converts the video source data into video data having corresponding attributes suitable for display on the electronic ink screen 110 in units of pixels or pixel groups in sequence, and provides the video data having corresponding attributes to the display controller 120 in units of pixels or pixel groups in sequence, so that the display controller 120 controls the electronic ink screen 110 to display a video picture represented by the video data in real time.

[0061] Those skilled in the art can understand that the video stream is a common video transmission mode, which can also be referred to as streaming media. The video stream can realize playing while downloading, and the user can start watching without waiting for the complete video file to be downloaded, and meanwhile, has a smooth experience. In this way, the input video stream is convenient for being processed in real time and displayed in real time. Moreover, since the resolution, brightness, grayscale and other attributes of the video source data obtained from the video source can not be suitable for the electronic ink screen 110, it is necessary to convert the video source data, and the video data obtained after the attribute conversion is suitable for being displayed on the electronic ink screen 110. Moreover, the converted video data can be provided to the display controller 120 in units of pixels or pixel groups. In this way, the video processor 130 can receive, process and provide the video source data to the display controller 120 at an appropriate speed without processing a large amount of data at a time.

[0062] In the electronic ink screen display according to one embodiment of the present disclosure, the video processor receives video source data including a plurality of frames from a video source in units of pixels or pixel groups in a video stream manner at a preset frame rate, converts the video source data into video data with corresponding attributes suitable for being displayed on the electronic ink screen in units of pixels or pixel groups in sequence, and provides the video data with corresponding attributes to the display controller in units of pixels or pixel groups, so that the display controller controls the electronic ink screen to display a video picture represented by the video source data in real time, that is, displays the video stream in real time, and meanwhile, since the video data has appropriate attributes, the picture quality of the whole video can be maintained at a high level, thereby obtaining a good display effect.

[0063] The exemplary structure of the video processor 130 in FIG. 1 is described below with reference to FIG. 2.

[0064] FIG. 2 shows an exemplary structure diagram of the video processor 130 in the electronic ink screen display 100 in FIG. 1 according to an embodiment of the present disclosure.

[0065] As shown in FIG. 2, in one embodiment of the present disclosure, the video processor 130 can include a video receiving module 210, a resolution adjusting module 220, a pixel brightness adjusting module 230, and a gray scale converting module 240. The video receiving module 210 is configured to receive video source data including a plurality of frames from a video source in a manner of a video stream at a preset frame rate. The resolution adjusting module 220 is configured to adjust the resolution of the received video source data to be consistent with the resolution of the e-ink screen 110. The pixel brightness adjusting module 230 is configured to adjust the pixel brightness of the video data after the resolution adjustment. The gray scale converting module 240 is configured to convert the video data after the pixel brightness adjustment to obtain video data with corresponding resolution, brightness, and gray scale suitable for display on the e-ink screen 110, and provide the video data with corresponding resolution, brightness, and gray scale to the display controller 120 in units of pixels or pixel groups.

[0066] In one embodiment of the present disclosure, the video source data processing performed by the video processor 130 can be understood as pixel operation. After the video receiving module 210 receives the video source data, the resolution adjusting module 220 is first used to perform resolution adjustment. In one example in which the resolution of the video source data needs to be adjusted to be higher, the resolution adjusting module 220 can be referred to as a stretching module configured to stretch the original image in the video source data. For example, some mobile phone manufacturers only support 1080P (resolution 1920x1080) image output by default, but the resolution of the e-ink screen in the e-ink screen display of the embodiment of the present disclosure is 3200x1800. In this case, the resolution adjusting module 220 can adjust the 1080P image to a resolution of 3200x1800 through an algorithm. It should be understood that the resolution adjusting module 220 can adjust the resolution of the video source data to be higher or lower. For example, the resolution adjusting module 220 can adjust the video source data with a resolution of 3840x2160 to video data with a resolution of 1080P or video data with a resolution of 3200x1800. Those skilled in the art can understand that the specific details of the resolution adjustment operation performed by the resolution adjusting module 220 can be obtained from related technologies, and the present disclosure is not limited to the above examples, and no further description is made.

[0067] In one embodiment of the present disclosure, the brightness adjustment of the pixel brightness adjustment module 230 on the resolution-adjusted video data can refer to brightness increase or brightness decrease on the video signal. For example, the pixel brightness adjustment module 230 increases the brightness of all pixels of the resolution-adjusted video data, so that the original color of all pixels is brighter. For another example, the pixel brightness adjustment module 230 decreases the brightness of all pixels of the resolution-adjusted video data, so that the original color of all pixels is darker. For yet another example, the pixel brightness adjustment module 230 decreases the brightness of some pixels of the resolution-adjusted video data and increases the brightness of some pixels. Through such operations, the display effect of the video when displayed on the electronic ink screen can be improved. Those skilled in the art can understand that the specific details of the brightness adjustment operation performed by the pixel brightness adjustment module 230 can be obtained from the related art, and the present disclosure is not limited to the above examples, and will not be described here.

[0068] In one embodiment of the present disclosure, the gray scale conversion module 240 can perform gray scale conversion on the video data after the pixel brightness adjustment, i.e., the pixel data. For example, the gray scale conversion can include linear transformation and nonlinear transformation. In one example, the gray scale conversion module 240 can convert the 24-bit data of the standard RGB888 color format of the video source data into 8-bit gray scale values to adapt to the electronic ink screen. For example, the gray scale conversion module 240 can perform gray scale conversion through the following gray scale image conversion formula:

[0069] Gray = Coefficient 1 * R + Coefficient 2 * G + Coefficient 3 * B

[0070] wherein Gray represents the gray scale value obtained after conversion, R is 8-bit data representing red, G is 8-bit data representing green, and B is 8-bit data representing blue. Those skilled in the art can understand that the specific details of the gray scale conversion operation performed by the gray scale conversion module 240 and the specific gray scale image conversion formula (e.g., the respective coefficients) can be obtained from the related art, and the present disclosure is not limited to the above examples, and will not be described here.

[0071] In the electronic ink screen display according to one embodiment of the present disclosure, the video processor comprises: a video receiving module configured to receive video source data comprising a plurality of frames from a video source in the form of a video stream at a preset frame rate; a resolution adjusting module configured to adjust the resolution of the received video source data to be consistent with the resolution of the electronic ink screen; a pixel brightness adjusting module configured to adjust the pixel brightness of the video data after resolution adjustment; and a grayscale conversion module configured to convert the grayscale of the video data after pixel brightness adjustment to obtain video data with corresponding resolution, brightness and grayscale suitable for display on the electronic ink screen, and provide the video data with corresponding resolution, brightness and grayscale to the display controller in units of pixels or pixel groups, so that the electronic ink screen display can display the video stream in real time, the refresh frequency of the electronic ink screen is consistent with the frame rate of the video input to the electronic ink screen, and even the video display can be realized at the limit refresh frequency of the electronic ink screen itself, and the picture quality of the video as a whole can be maintained at a high level due to the appropriate resolution, brightness and grayscale of the video data while the video stream is being displayed, thereby obtaining a good display effect.

[0072] In the electronic ink screen display according to the embodiment of the present disclosure, the video processor 130 provides the video data with appropriate resolution, brightness and grayscale to the display controller 120. The display controller 120 processes the received video data in units of pixels or pixel groups comprising a plurality of pixels to obtain video data to be displayed, generates driving data based on the video data to be displayed and sends the driving data to the electronic ink screen 110 to control the electronic ink screen 110 to apply a voltage to the microcapsules corresponding to one or more pixels corresponding to the video data to be displayed at most once by driving electrodes. How the electronic ink screen drives the electrodes to apply a voltage to the microcapsules corresponding to the respective pixels corresponding to the video data to be displayed to drive the color particles in the microcapsules to move to reach the target position to complete the picture display is described below in conjunction with FIGS. 3A and 3B.

[0073] How the electronic ink screen of the related art makes the electrodes apply a voltage to the microcapsules to drive the color particles to move multiple times to reach the target position to complete the picture display is described below with reference to FIG. 3A.

[0074] FIG. 3A exemplarily shows a conceptual diagram of the movement of color particles in the microcapsules in the electronic ink display screen in the related art when a frame of image is completely displayed. It should be understood that the number, shape, size and working manner of the microcapsules and color particles shown in the figure are only examples to facilitate the understanding of the related concept by those skilled in the art, and the specific number, shape, size and working manner are not limited thereto.

[0075] As shown in FIG. 3A, in this example, the electronic ink screen of the related art needs to apply voltage through the upper electrode (upper plate) 311 and the lower electrode (lower plate) 312 above the capsule 320 multiple times to drive the color particles in the microcapsule 320 to the target position multiple times when displaying a frame of image in a video with a frame rate of 40 Hz of the video source. In the example of FIG. 3A, the black solid circle 321 in the microcapsule 320 represents the initial position of the color particles, and the black solid circle 322 represents the target position of the color particles. In the example shown in FIG. 3A, the electronic ink screen applies voltage through its electrodes 311 and 312 continuously 7 times to drive the color particles to move from the initial position 321 to the target position 322. The arrows in the figure show the 7 times of schematic movement trajectories of the color particles when the electrodes 311 and 312 apply voltage 7 times, and along the 7 times of movement trajectories, the 6 hollow circles located between the initial position 321 and the target position 322 represent the positions reached by the color particles when they are driven by voltage for the first 6 times, and the black solid circle 322 represents the target position reached by the color particles when they are driven by voltage for the 7th time. Moreover, the direction of voltage application can change every time during the 7 times of voltage application. It can be understood that it is also possible to apply voltage in the same direction for several times when applying voltage multiple times. By applying voltage multiple times to drive the color particles in the microcapsule 320 to the target position multiple times, the display of a frame of image in a video with a frame rate of 40 Hz can be completed, but the refresh rate of displaying the frame of image is much lower than 40 Hz. Since the color particles in each capsule of the electronic ink screen need to move 7 times during the display of a frame, the frame rate can only reach 7 frames to 10 frames per second. That is, for the input video with a frame rate of 40 Hz, the display refresh rate can only reach 7 Hz to 10 Hz. Such refresh rate is not sufficient to display the video smoothly, i.e., the display effect of the video is poor.

[0076] In addition, although only one color particle in one microcapsule 320 is shown in FIG. 3A, it should be understood that this is merely to illustrate how the color particles in the microcapsules move when the electronic ink screen of the related art displays one frame of image. Moreover, the electrodes apply the voltage 7 times to drive the color particles to move 7 times is merely an example, and the number of times the electrodes apply the voltage can be more or less. Moreover, depending on the refresh mode of the adopted related art, it is possible that the color particles in the microcapsules move vertically upward multiple times, or move vertically downward multiple times, or move vertically upward and move vertically downward multiple times alternately when the electronic ink screen displays one frame of image. It should be understood that the electronic ink screen of the related art needs to apply multiple voltages to drive the color particles to reach the target position through multiple movements when displaying one frame of image, usually 4 to 16 times of voltages are needed to drive the color particles in the microcapsules to move 4 to 16 times. Moreover, in the case of applying one voltage for tens of milliseconds, the electronic ink screen of the related art needs even hundreds of milliseconds to complete the display of one frame of image. It can be understood that the electronic ink display screen of the related art needs to apply multiple voltages to drive the color particles to move multiple times to display one frame of image, which is too long for video display, and the display effect is poor.

[0077] The electronic ink screen display according to the embodiments of the present disclosure is described below with reference to FIG. 3B to illustrate how the electrodes apply at most one voltage to the microcapsules to drive the color particles to move at most once to complete the video display when displaying one frame of image.

[0078] FIG. 3B illustrates a conceptual diagram of the movement of the color particles in the microcapsules when the electronic ink display screen according to the embodiments of the present disclosure displays two frames of images in succession. It should be understood that the number, shape, size and working manner of the microcapsules and the color particles shown in the figure are merely examples to facilitate the understanding of the related concepts by those skilled in the art, and the specific number, shape, size and working manner are not limited thereto.

[0079] As shown in FIG. 3B, when displaying the nth frame of the video, the electronic ink screen according to the embodiment of the present disclosure needs to apply a voltage once through the upper electrode (upper plate) 331 and the lower electrode (lower plate) 332 above the capsule 340 to drive the color particles (represented by black solid circles) in the microcapsule 340 to move once, i.e., from the initial position 341 at the time of displaying the nth frame to the target position 342. In one embodiment of the present disclosure, when displaying the nth+1 frame of the video, since the nth frame and the nth+1 frame in the video are different, the electronic ink screen according to the embodiment of the present disclosure applies a voltage once through the upper electrode 331 and the lower electrode 332 above the microcapsule 340 to drive the color particles in the microcapsule 340 to move again, i.e., from the initial position 342 at the time of displaying the nth+1 frame (the target position at the time of displaying the nth frame) to the target position 343. The color particle movement mode shown in FIG. 3B is only an example. In another embodiment of the present disclosure, it is possible that the color particles in the microcapsule move vertically upward once or vertically downward once when the electronic ink screen displays a frame of image.

[0080] In another embodiment of the present disclosure, since the nth frame and the nth+1 frame in the video are completely the same, or partially the same, when refreshing the nth+1 frame, for the same part of the pixels, the electronic ink screen can drive the upper electrode 331 and the lower electrode 332 above the capsule 340 to apply a voltage once again in the same way as applying a voltage once at the corresponding pixel position in the nth frame. This is because, since applying a voltage once in the nth frame can not have caused the color particles in the microcapsule at the corresponding pixel position to move to the target position enough to make the nth frame be clearly displayed, in the nth+1 frame, the color particles in the microcapsule still need to continue to move to the target position, so that the video frame picture at the corresponding pixel in the nth+1 frame is more clearly displayed than in the nth frame.

[0081] That is, the driving of the electrodes 331, 332 to apply a voltage once at the corresponding pixel position to make the color particles move when displaying the nth+1 frame shown in FIG. 3B represents two cases: for the same position of the pixels of the nth frame and the nth+1 frame, the displayed video data can be different, or can be the same. In addition, those skilled in the art can understand that, if the voltage direction of applying a voltage once at the corresponding pixel position when displaying the nth+1 frame is opposite to the voltage direction of applying a voltage once at the corresponding pixel position when displaying the nth frame, it is because the nth frame and the nth+1 frame in the video are different. In this case, the opposite voltage directions make the movement directions of the electrodes driving the color particles opposite.

[0082] In one embodiment of the present disclosure, if the nth frame in the video is identical to the nth+1 frame, or partially identical, and the driving data generated by the display controller 120 indicates that the electrodes 331 and 332 above and below the microcapsules 340 of the electronic ink screen 110 are driven to apply the voltage again in the same way as the previous time, and the number of continuous application of the voltage reaches a preset threshold, the driving data generated indicates that the electronic ink screen 110 does not drive the electrodes, i.e. does not apply voltage. The preset threshold can be determined according to the performance of the electronic ink screen itself. For example, the preset threshold can be 3 times, 4 times, 6 times, 10 times, etc., which is not limited in the present disclosure. For example, the preset threshold is 4 times can mean that the color particles in the microcapsules of the electronic ink screen 110 displaying the same video data for multiple times in succession are driven by the same voltage for 4 times in succession, i.e. the color particles can be moved to the target position. Moreover, in the case of displaying the same video data for the 5th time immediately after the color particles are driven for the 4th time, the display effect of the frame cannot be made better by continuing to drive the color particles. Therefore, in this embodiment, when displaying the nth+1 frame of the video, the electronic ink screen according to the embodiment of the present disclosure can not apply voltage to the electrodes 331 and 332 above and below the microcapsules corresponding to some or certain pixels. In this case, when displaying the nth+1 frame, the color particles in the corresponding microcapsules remain in the initial position at the nth+1 frame without movement. In addition, the driving data indicating that the electronic ink screen 110 does not drive the electrodes can also save energy and prolong the service life of the corresponding components.

[0083] The way of displaying video in the electronic ink screen display according to the embodiment of the present disclosure is further illustrated by examples as follows.

[0084] For example, in the case that the refresh mode of the electronic ink screen display of the embodiments of the present disclosure is to output a video at 40 Hz (i.e., 40 frames per second), the electronic ink screen of the embodiments of the present disclosure can display 40 frames per second, i.e., the refresh rate is also 40 Hz. That is, in the case that the driving electrode applies a voltage to the microcapsule corresponding to one or more pixels corresponding to the video data to be displayed in a frame once for 25 ms (milliseconds), the display of a frame of image is completed only in 25 ms. In contrast, in the case that the refresh mode of the electronic ink screen of the related art is to output a video at 40 Hz, since the electronic ink screen usually needs to be refreshed 4 to 16 times (i.e., 4 to 16 times of voltage application to drive the color particles to move from the initial position to the target position) for each frame of picture update, in fact, the electronic ink screen usually displays only 7 to 10 frames per second. Therefore, compared with the display scheme of the electronic ink screen of the related art, in the embodiments of the present disclosure, after the electronic ink screen display receives the video source data of the external video source, the video data can be refreshed to the electronic ink screen immediately, i.e., the electronic ink screen is refreshed synchronously while receiving the video source data, and the effect of real-time display of the video can be achieved.

[0085] For example, in the case that the refresh mode of the electronic ink screen display of the embodiments of the present disclosure is to output a video at 40 Hz (i.e., 40 frames per second), the electronic ink screen of the embodiments of the present disclosure can display 40 frames per second, i.e., the refresh rate is also 40 Hz. That is, in the case that the driving electrode applies a voltage to the microcapsule corresponding to one or more pixels corresponding to the video data to be displayed in a frame once for 25 ms (milliseconds), the display of a frame of image is completed only in 25 ms. In contrast, in the case that the refresh mode of the electronic ink screen of the related art is to output a video at 40 Hz, since the electronic ink screen usually needs to be refreshed 4 to 16 times (i.e., 4 to 16 times of voltage application to drive the color particles to move from the initial position to the target position) for each frame of picture update, in fact, the electronic ink screen usually displays only 7 to 10 frames per second. Therefore, compared with the display scheme of the electronic ink screen of the related art, in the embodiments of the present disclosure, after the electronic ink screen display receives the video source data of the external video source, the video data can be refreshed to the electronic ink screen immediately, i.e., the electronic ink screen is refreshed synchronously while receiving the video source data, and the effect of real-time display of the video can be achieved.

[0086] The refresh rate of the electronic ink screen display in the above examples exceeds the video playing speed of about 12 frames per second without a sense of lag, and also reaches or exceeds the frame rate requirement of 25 to 30 frames per second when playing a movie, a television program, a computer game, etc. It should be understood that the refresh rate, the frame rate, and the corresponding time of applying voltage to the microcapsule and the time of displaying a frame mentioned in the embodiments of the present disclosure are only examples, and various refresh rates, frame rates, etc. can be set according to the situation, as long as the actual needs of real-time playing of the video can be met.

[0087] According to the above content of the present disclosure, those skilled in the art can understand that, when displaying a frame of picture in a video, only applying the driving voltage to the microcapsule corresponding to each pixel of the electronic ink screen at most once to drive the color particles to move at most once can significantly improve the refresh speed of the frame of picture, so as to play the video smoothly. How to maintain the picture quality of the whole video at a high level while applying the driving voltage at most once will be described in detail below.

[0088] First of all, it needs to be pointed out that, in the related art, there is no implementation mode that the electronic ink screen can make the color particles move to the target position in the microcapsule by applying the voltage once to complete the refresh of a frame of picture in the video. Moreover, in the related art, the feature that the color particles can reach the target position in the microcapsule by applying the voltage multiple times to drive the color particles to move multiple times is the embodiment of the physical characteristics of the electronic ink screen, and is the way determined by the researchers of the electronic ink screen through repeated experiments to make the color particles reach the target position in the microcapsule to display a frame of picture completely and obtain the expected display effect.

[0089] Secondly, in the embodiment of the present disclosure, although the electronic ink screen driving electrode applies the voltage at most once to the microcapsule corresponding to one or more pixels corresponding to the video data to be displayed to improve the refresh speed, this way of driving the color particles to move once to complete the refresh of the current to-be-displayed data cannot guarantee that the previous several frames of picture in the video can be displayed completely and clearly. Especially for the first frame in the video, it is almost difficult to display the frame of picture completely and clearly by driving the color particles in the microcapsules corresponding to all the pixels corresponding to the video data in the frame to move once.

[0090] According to the experimental results of the inventors of the present disclosure, from the second frame or the third frame in the video, the image of the second frame or the third frame can be displayed completely and relatively clearly by driving the color particles in the microcapsules corresponding to all the pixels corresponding to the video data in the frame to move once, that is, the picture quality of the whole video can be acceptable. From the fourth frame in the video, the color particles in the microcapsules corresponding to all the pixels corresponding to the video data in the frame are driven by the electronic ink screen to move once, which can make the picture quality of the frame of picture reach almost the same picture quality as displaying a static picture with the same resolution, color and gray scale by using the electronic ink display screen of the related art, that is, the picture quality is maintained at an excellent level.

[0091] As can be appreciated by one skilled in the art, in the first few frames (e.g., 10 or more frames, such as the limit refresh rate of an e-ink screen corresponds to 60 frames) of a video display by the e-ink screen display according to the embodiments of the present disclosure, the first frame, or the first two frames, or the first five frames, or even the first eight frames, the color particles in the microcapsules corresponding to the pixels of the frames can not be driven to the proper positions in the microcapsules due to the electrode driving, and thus the picture quality can not be good enough. However, the inventors of the present disclosure have found through experiments that the picture quality of the frames after these frames (including the frames starting from the second second of the video) can be almost the same as the picture quality of a static image displayed by an e-ink screen according to the related art at the same resolution, color, and gray scale, if the color particles in the microcapsules corresponding to the pixels of the frames are driven only once.

[0092] As can be appreciated by one skilled in the art, the difference between two adjacent frames of video data in a video is usually small, and even most of the pixels do not change. That is, compared to the nth frame, the color particles in the microcapsules corresponding to the pixels of the nth+1 frame of video data can be driven to move a small distance to reach the target positions that can make the frame be displayed with good picture quality, and even most of the color particles in the microcapsules corresponding to the pixels of the nth+1 frame of video data do not need to be driven to move because most of the color particles in the microcapsules corresponding to the pixels of the nth frame of video data have already reached the target positions in the microcapsules (i.e., the target positions that make the nth frame reach good picture quality). Moreover, compared to the driving manner of the related art (the color particles in the microcapsules of each pixel are synchronously driven multiple times), the embodiments of the present disclosure reduce the driving of the color particles in the microcapsules of the pixels that do not change, and thus optimize the picture display. That is, the embodiments of the present disclosure achieve driving for the pixels that change and reducing driving or even not driving for the pixels that do not change. Therefore, the color particles in the microcapsules corresponding to the pixels of the frames after the aforementioned frames with poor picture quality are driven at most once, and the picture quality of the frames can be almost the same as the picture quality of a static image displayed by an e-ink screen according to the related art at the same resolution, color, and gray scale.

[0093] It should be noted that the picture quality of the first frame, the second frame, the third frame and the fourth frame mentioned here are the effects obtained by applying a voltage to the microcapsules of the corresponding pixels once. That is, the frame rate of the video including these frames is 33 frames per second, and the corresponding time of applying a voltage once is determined based on the frame rate, that is, 30 ms. If the frame rate of the video is higher, the corresponding time of applying a voltage once will be shorter, and the picture quality of the image of the frame can reach an excellent level from the fifth frame, the sixth frame or later frames in the video. In addition, the electronic ink screen produced by different manufacturers, the electronic ink screen of different materials can affect the frame from which the picture quality can reach an excellent level, so the above content is only an example based on a certain specific electronic ink screen.

[0094] In one embodiment of the present disclosure, the duration of applying a voltage to the electrodes of the electronic ink screen 110 by the electronic ink screen 110 does not exceed the duration of a frame of video corresponding to the frame rate. This is because, in one case, the gray scale of the same pixel in the nth frame and the nth+1 frame of a video in a video can be completely different, so if the duration of applying a voltage once exceeds the duration of a frame of video corresponding to the frame rate, the nth+1 frame cannot be correctly displayed, or even lost. In another case, since the difference between adjacent two frames of video data in a video can be small, compared with the nth frame, the color particles in the microcapsules corresponding to the pixels corresponding to the nth+1 frame of video data are usually driven to move a small distance, at this time, the duration of applying a voltage to the electrodes once can be shorter than the duration of a frame of video corresponding to the frame rate.

[0095] In the electronic ink screen display according to one embodiment of the present disclosure, the duration of applying a voltage to the electrodes by the electronic ink screen does not exceed the duration of a frame of video corresponding to the frame rate, so that the color particles in the microcapsules can be driven by appropriate voltage while video display is performed through the electronic ink screen at a preset frame rate, so as to maintain the picture quality of the video as a whole at a high level, thereby obtaining a good display effect.

[0096] It should be understood that the video frame rate should not be higher than the maximum refresh rate of the e-ink display screen, because a too high video frame rate does not bring about an improvement in smoothness and picture quality when displayed by the e-ink screen. In addition, if the frame rate of the video becomes lower, the time for applying a voltage to the microcapsule corresponding to one or more pixels of the video data to be displayed is longer, and the picture quality of the image of the 3rd frame from the video can reach an excellent level. Moreover, as mentioned above, there is no implementation in the related art in which the e-ink screen alone can move the color particles to the target position in the microcapsule by applying a voltage once to refresh a frame of the video. Therefore, even if the time for applying a voltage to the microcapsule corresponding to one or more pixels of the video data to be displayed is extended as much as possible, it is difficult to make the picture quality of the 1st frame reach an excellent level. Those skilled in the art can understand that even if it is difficult to make the picture quality reach an excellent level from the 1st frame of the video, making the picture quality reach an excellent level from the 4th frame is sufficient for the user of the video content. For example, when a user watches a video with a frame rate of 33 frames per second, the video picture is only slightly blurred for about 100 ms at the beginning, and reaches the same excellent picture quality as the e-ink display screen of the related art displays a static image in a very short time, with good smoothness. The inventors of the present disclosure have made a comparison by playing the same video content using a liquid crystal display and an e-ink screen according to the embodiments of the present disclosure (which can be an e-ink screen to which a color polarizing sheet is applied), and the refresh rates and picture qualities of the two are almost the same, and the user cannot distinguish the display effects of the two with the naked eye.

[0097] It should be noted that although the picture quality of each frame image is mentioned here, in the embodiments of the present disclosure, the picture refreshing mode of displaying one frame in its entirety and then displaying the next frame in its entirety, i.e., the mode of refreshing all the pixels in one frame at the same time, is not adopted. Specifically, the display controller of the electronic ink screen display according to the embodiments of the present disclosure processes the received video data in units of pixels or pixel groups including multiple pixels to obtain the video data to be displayed. The display controller generates driving data based on the video data to be displayed and sends the driving data to the electronic ink screen to control the electronic ink screen to apply a voltage at most once to the microcapsules corresponding to one or more pixels corresponding to the video data to be displayed by driving the electrodes. That is, the electronic ink screen display according to the embodiments of the present disclosure processes the video data in units of single pixels or pixel groups including multiple pixels, and displays the video picture in units of single pixels or pixel groups including multiple pixels (for example, 4 pixels per group, or 8 pixels per group, or 10 pixels per group, or 16 pixels per group, or one row of pixels of the electronic ink screen per group, or multiple rows of pixels per group, etc.). In this way, the efficiency of processing the video data and the refreshing efficiency of the electronic ink screen display when displaying the video can be improved, and the smoothness of displaying the video can be better. In the embodiments of the present disclosure, the video is processed and displayed in units of single pixels or pixel groups including multiple pixels, which on the one hand makes the input video (or video stream) easy to be processed and displayed in real time. On the other hand, since a large amount of video data needs to be received, processed, or displayed at the same time, higher processing capability and higher hardware configuration level are required, which increases the overall cost of the electronic ink screen display and may affect the reliability of the electronic ink screen display. Therefore, the electronic ink screen display according to the embodiments of the present disclosure processes and displays the video in units of single pixels or pixel groups including multiple pixels, which can facilitate the real-time processing and display of the video, control the product manufacturing cost at a reasonable level, and ensure the reliability of the electronic ink screen display.

[0098] In the electronic ink screen display 100 according to one embodiment of the present disclosure, the display controller 120 can arrange the received video data in sequence in units of pixels or pixel groups, and pack the video data as a video data packet as the video data to be displayed, and generate driving data based on the video data packet and send the driving data to the electronic ink screen 110 as soon as a video data packet is packed, so that the electronic ink screen 110 drives the electrodes to apply a voltage at most once to the microcapsules corresponding to one or more pixels corresponding to the video data packet based on the driving data, thereby completing the display of the one or more pixels corresponding to the video data to be displayed.

[0099] In this embodiment, the display controller 120 receives video data from the video processor 130 in units of pixels or groups of pixels and arranges the video data in correct front-to-back order. That is, the display controller 120 arranges video data corresponding to a plurality of pixels or video data corresponding to a plurality of groups of pixels in correct front-to-back order upon receiving the video data. Next, the display controller 120 packs the arranged data into a video data packet. The display controller 120 generates driving data based on the video data packet to provide to the electronic ink screen 110. The electronic ink screen 110 drives the electrode pair to apply a voltage to the microcapsule corresponding to the corresponding pixel based on the driving data at most once, thereby completing display of the video data packet. Embodiments of the present disclosure do not limit the size of the video data packet as long as the size of the video data of one frame of video is not exceeded.

[0100] In one embodiment of the present disclosure, the size of the video data packet should be suitable for the display controller 120 to perform processing and the driving data generated based thereon should be suitable for the electronic ink screen to drive the electrode for a proper number of pixels. That is, too small a video data packet and driving data generated based thereon can make the display controller 120 and the electronic ink screen 110 inefficient, and too large a video data packet and driving data generated based thereon can make the display controller 120 and the electronic ink screen 110 difficult to process, and the processing capacity must be improved, thereby requiring a hardware structure with high cost.

[0101] In an electronic ink screen display according to one embodiment of the present disclosure, the display controller arranges received video data in order in units of pixels or groups of pixels and packs the video data into a video data packet as to-be-displayed video data, and generates driving data based on the video data packet and sends the driving data to the electronic ink screen as soon as a video data packet is packed, so that the electronic ink screen drives the electrode to apply a voltage to the microcapsule corresponding to one or more pixels corresponding to the video data packet based on the driving data at most once, thereby completing display of the one or more pixels corresponding to the to-be-displayed video data, which can make the driving data provided by the display controller better match the inherent performance of the electronic ink screen, thereby further reducing the refresh time of each frame of video and further improving the overall video picture quality while displaying the video at a preset frame rate through the electronic ink screen, thereby achieving good display effect.

[0102] The schematic block diagram of an electronic ink screen display according to another embodiment of the present disclosure is described below with reference to FIG. 4.

[0103] FIG. 4 shows a schematic block diagram of an electronic ink screen display according to another embodiment of the present disclosure.

[0104] As shown in FIG. 4, the electronic ink screen display 400 includes the electronic ink screen 110, the display controller 120, the video processor 130, and a frame data storage 410. Among them, except for the frame data storage 410, the electronic ink screen 110, the display controller 120, and the video processor 130 are the same as the electronic ink screen 110, the display controller 120, and the video processor 130 in the electronic ink screen display 100 described with reference to FIG. 1, and the related content is not repeated here.

[0105] The frame data storage 410 is configured to store first video data of a current frame that is currently displayed on the electronic ink screen 110 and has completed display, and second video data of a previous frame that has completed full display on the electronic ink screen 110 and has not been replaced by video data of the current frame, wherein the second video data includes third video data, and the third video data corresponds to pixels that are the same as pixels corresponding to the to-be-displayed video data in the frame to which the to-be-displayed video data belongs. The display controller 120 compares the to-be-displayed video data with the third video data, and outputs a comparison result, and generates driving data based on the comparison result. If the comparison result is different, the generated driving data instructs the electronic ink screen 110 to drive the electrodes to apply a voltage to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data once; if the comparison result is the same, the generated driving data instructs the electronic ink screen 110 to drive the electrodes to apply a voltage in the same way as the previous time.

[0106] In another embodiment of the present disclosure, if the comparison result is the same, and the driving data generated by the display controller 120 instructs the electronic ink screen 110 to drive the electrodes to apply a voltage in the same way as the previous time for a preset threshold number of times of continuous voltage application, the generated driving data instructs the electronic ink screen 110 not to drive the electrodes.

[0107] The above discussion of various cases of different or same comparison results with reference to FIG. 4 can also refer to the foregoing discussion of the case of displaying the nth frame and the n+1th frame in the video based on FIG. 3B, wherein the nth frame can correspond to the third video data, and the n+1th frame can correspond to the to-be-displayed video data. Therefore, further discussion of various cases of different or same comparison results is omitted here.

[0108] In one embodiment of the present disclosure, the frame data memory 410 can be various volatile memories or non-volatile memories as long as the writing speed requirement and the reading speed requirement of the video data are met, and the present disclosure does not limit this. For example, the frame data memory 410 can be a DDR memory. In one embodiment of the present disclosure, the frame data memory 410 can store the data amount corresponding to one frame of image. In another embodiment of the present disclosure, the frame data memory 410 can store the data amount of more than one frame of image.

[0109] In the electronic ink screen display according to one embodiment of the present disclosure, by the frame data memory, it is used to store the first video data of the current frame which is currently displayed on the electronic ink screen and has completed the display, and the second video data of the previous frame which has completed the full display and has not been replaced by the video data of the current frame, wherein the second video data includes third video data, the pixel corresponding to the third video data is the same position pixel as the pixel corresponding to the to-be-displayed video data in the frame thereof, wherein the display controller compares the to-be-displayed video data with the third video data, and outputs the comparison result, and generates driving data based on the comparison result, wherein if the comparison result is different, the generated driving data instructs the electronic ink screen to drive the electrode to apply a voltage to the microcapsule corresponding to one or more pixels corresponding to the to-be-displayed video data; if the comparison result is the same, the generated driving data instructs the electronic ink screen to drive the electrode to re-apply a voltage in the manner of applying the previous voltage, and the microcapsule corresponding to one or more pixels corresponding to the to-be-displayed video data can be applied with a voltage in different ways when the to-be-displayed video data is the same or different from the third video data when the electronic ink screen is refreshed, thereby reducing the refresh time of each frame of the video, while the picture quality of the video as a whole can be maintained at a high level, thereby obtaining a good display effect.

[0110] In the electronic ink screen display according to one embodiment of the present disclosure, if the comparison result is the same, and the number of consecutive voltage applications of the driving data generated by the display controller instructing the electronic ink screen to drive the electrode to re-apply a voltage in the manner of applying the previous voltage reaches a preset threshold, the generated driving data instructs the electronic ink screen not to drive the electrode, so that the power consumption can be reduced as much as possible while the video is displayed by the electronic ink screen at a preset frame rate, the service life of the corresponding components of the electronic ink screen is maintained, and the power consumption of the electronic ink screen display is reduced and the service life of the electronic ink screen display is improved.

[0111] An exemplary schematic diagram of one example of the video data stored by the frame memory 410 is described below with reference to FIG. 5.

[0112] FIG. 5 shows an exemplary schematic diagram of one example of the video data stored by the frame data memory 410 in one embodiment of the present disclosure.

[0113] In one embodiment of the present disclosure, the video data 500 corresponding to one frame of image stored by the frame data memory 410 is stored in pixel units. In the example shown in FIG. 5, the video data 500 corresponding to one frame of image is of a data amount of 64*32 resolution. FIG. 5 shows 64*32 small squares 501, one small square 501 corresponding to the video data of one pixel. As shown in FIG. 5, the video data 510 corresponding to the upper 64*10 pixels of the video data 500 of one frame of data amount refers to the first video data (represented by the small squares with diagonal lines) of the current frame which has been completed display and is currently being displayed on the electronic ink screen 110 and has not yet completed the entire display. As shown in FIG. 5, the video data 520 corresponding to the lower 64*22 pixels of the video data 500 of one frame of data amount refers to the second video data (represented by the blank small squares) of the previous frame which has completed the entire display and has not yet been replaced by the video data of the current frame and is currently being displayed on the electronic ink screen 110. As shown in FIG. 5, the third video data 530 included in the second video data 520 is represented by the small squares in black, the pixels corresponding to the third video data 530 being the same position pixels as the pixels corresponding to the to-be-displayed video data in the frame thereof. In this embodiment, the third video data 530 is the video data corresponding to the pixels of the 11th row in the video data 500. It can be understood that the data amount of one frame of video data stored by the frame data memory 410 can not be limited to the data corresponding to the 64*32 resolution, but can be any resolution data as long as it corresponds to the resolution of the electronic ink screen.

[0114] Based on the video data stored in the frame data storage 410 shown in FIG. 5, it can be understood that the first video data 510 belongs to a current frame being displayed on the e-ink screen 110, and the second video data 520 belongs to a previous frame having been completely displayed on the e-ink screen 110. It should be noted that the "completely displayed on the e-ink screen 110" mentioned herein does not mean that the video data of the previous frame has been completely replaced (covered) by the current frame in the frame storage 410 and the e-ink screen 110, but only the partial video data corresponding to the 64*10 pixels corresponding to the first video data 510 is replaced (covered) by the first video data 510 in the frame storage 410 and the e-ink screen 110. From the perspective of instant display (real-time display), the current frame refers to a frame being provided from the video source to the e-ink screen display, and the previous frame having been completely displayed on the e-ink screen refers to a frame that has been completely provided from the video source to the e-ink screen display.

[0115] Based on the above description of FIG. 5, it can be understood that, unlike the related art, the e-ink screen display in the embodiments of the present disclosure can store and display video in units of pixels, pixel groups, lines, video data packets, etc., rather than in a frame-by-frame manner. However, those skilled in the art can understand that, with the provision of higher performance software and hardware, the e-ink screen display based on the embodiments of the present disclosure can also store and display video in a frame-by-frame manner, as long as complete and clear display of the video can be achieved by applying the driving voltage to the microcapsule corresponding to each pixel of the e-ink screen at most once when displaying a frame of the video.

[0116] In the e-ink screen display 400 of the embodiments of the present disclosure, the display controller 120 can read the third video data 530 from the frame data storage 410, compare the to-be-displayed video data (e.g., a video data packet) with the read third video data 530, output the comparison result, and generate driving data based on the comparison result. The manner of data comparison can be obtained from the related art, and the present disclosure will not be repeated. Generating driving data based on the comparison result means that different driving data can be generated based on whether the comparison result is the same or different, and the different driving data is for driving the electrode corresponding to the pixel in the previous frame displayed on the e-ink screen 110 corresponding to the video data that has not been replaced (covered) by the current frame video data at most once.

[0117] An exemplary block diagram of the display controller 120 in one embodiment of the present disclosure is described below with reference to FIG. 6, and one example of how to compare the to-be-displayed video data with the third video data and generate driving data is described with reference to FIGS. 5 and 6.

[0118] FIG. 6 shows an exemplary structure diagram of the display controller 120 in the electronic ink screen display 400 shown in FIG. 4.

[0119] As shown in FIG. 6, the display controller 120 includes a display engine 610, a driving data output module 620, and a pixel data buffer 630.

[0120] The display engine 610 reads the third video data 530 from the second video data 520 stored in the frame data storage 410 based on the index of the pixel corresponding to the to-be-displayed video data in the frame to which the to-be-displayed video data belongs, compares the to-be-displayed video data with the read third video data 530, and outputs the comparison result. In this embodiment, the third video data 530 is the video data corresponding to the 11th row of pixels in the video data 500. It can be understood that the to-be-displayed video data is the video data corresponding to the 11th row of pixels in the current frame in which the first video data 510 is located. The above to-be-displayed data (the video data packet provided by the pixel data buffer 630) is the video data corresponding to an entire row of pixels, which is merely an example. In fact, the to-be-displayed data (the video data packet provided by the pixel data buffer 630) can be video data of various sizes in units of pixels or pixel groups. In this embodiment, the index can be determined by the row number and the column number of the pixel in a frame image, or can be determined by assigning a number to each pixel in a frame image. Those skilled in the art can generate an index for a pixel according to the relevant technology, and the present disclosure does not limit this. In one embodiment, the difference video data can be the grayscale difference of the same pixel corresponding to the to-be-displayed video data and the third video data 530. For example, the grayscale difference can be a positive value or a negative value.

[0121] The driving data output module 620 generates the driving data according to the comparison result and sends the driving data to the electronic ink screen 110. The manner of generating the driving data according to the comparison result can refer to the foregoing content discussed based on FIG. 4, which will not be repeated here.

[0122] The pixel data buffer 630 buffers the video data received from the video processor 130 (see FIG. 4) in units of pixels or pixel groups, arranges the received video data in sequence, and packs the video data into a video data packet as to-be-displayed video data, and provides the to-be-displayed video data to the display engine 610 immediately after packing the video data packet. The related description of the arrangement and packing operation performed by the pixel data buffer 630 can refer to the foregoing description of the corresponding operation performed by the display controller 120, which will not be repeated here.

[0123] In the electronic ink screen display according to one embodiment of the present disclosure, the display controller comprises: a display engine configured to read the third video data from the second video data stored in the frame data storage based on the index of the pixel in the frame to which the to-be-displayed video data belongs, compare the to-be-displayed video data with the read third video data, and output a comparison result; a driving data output module configured to generate the driving data according to the comparison result and send the driving data to the electronic ink screen; and a pixel data buffer configured to buffer the video data received from the video processor in units of pixels or pixel groups, arrange the received video data in sequence, and pack the video data as a video data packet as the to-be-displayed video data, and provide the to-be-displayed video data to the display engine as soon as a video data packet is packed. The display controller can be implemented in a proper structure, the video data processing speed of the electronic ink screen display is improved, and the electronic ink screen is refreshed in a proper manner when the to-be-displayed video data is the same as or different from the third video data, so that the refresh time of each frame of the video is reduced, the picture quality of the video as a whole is maintained at a high level, and a good display effect is achieved.

[0124] In one embodiment of the present disclosure, the display engine 610 writes the to-be-displayed video data into the frame data storage 410 to replace the third video data 530 in the second video data 510 as part of the first video data 510.

[0125] As shown in FIG. 5, the display engine 610 writes the to-be-displayed video data into the frame data storage 410 to replace (overwrite) the third video data 530 through a write operation. In this case, the frame data storage 410 stores video data corresponding to the first 11 rows of pixels in the video data as the video data of the current frame, and stores video data corresponding to the last 21 rows of pixels in the video data as the video data of the previous frame. It can be understood that the display engine 610 can comprise a separate write operation module for performing video data writing to the frame data storage 410. In one example, the write operation module can be located outside the display engine 610 as part of the display controller 120. Similarly, the display engine 610 can comprise a separate read operation module for performing video data reading from the frame data storage 410 to complete the aforementioned comparison of the to-be-displayed video data with the second video data (third video data). In one example, the read operation module can be located outside the display engine 610 as part of the display controller 120.

[0126] In the electronic ink screen display according to one embodiment of the present disclosure, the display engine writes the to-be-displayed video data into the frame data memory to replace the third video data in the second video data as part of the first video data, so that the video data stored in the frame data memory can be updated in time, the display engine can accurately compare the third video data with the to-be-displayed video data, the reliability of the driving data provided by the display controller is ensured, and the display effect of the electronic ink screen display is ensured.

[0127] In one embodiment of the present disclosure, the display engine 610 writes the to-be-displayed video data which is different from the third video data 530 for the same pixel into the frame data memory 410 according to the comparison result, and retains the third video data 530 which is the same for the same pixel, so as to complete the replacement of the third video data 530 and serve as part of the first video data 510.

[0128] In the electronic ink screen display according to one embodiment of the present disclosure, the display engine writes the to-be-displayed video data which is different from the third video data for the same pixel into the frame data memory according to the comparison result, and retains the third video data which is the same for the same pixel, so as to complete the replacement of the third video data and serve as part of the first video data, which can reduce the number of times of writing into the frame data memory, improve the writing efficiency, reduce the power consumption of the frame data memory, prolong the service life of the frame data memory, and further reduce the power consumption of the electronic ink screen display and prolong the service life of the electronic ink screen display.

[0129] Those skilled in the art can also understand that various illustrative logical blocks, units, and steps listed in the embodiments of the present disclosure can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly show the replaceability of hardware and software, the above various illustrative components, units and steps have been generally described their functions. Whether the functions are implemented by hardware or software depends on the specific application and design requirements of the overall system. Those skilled in the art can use various methods to implement the functions for each specific application, but such implementation should not be understood as beyond the scope of protection of the embodiments of the present disclosure.

[0130] The various illustrative logical blocks, modules, or units described in connection with the embodiments disclosed herein can be implemented or performed with 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 can be a microprocessor, but in the alternative, the general purpose processor can be any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of 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 such configuration.

[0131] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside 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. An exemplary storage medium can be coupled to the processor, such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC, which can reside in a user terminal. In the alternative, the processor and the storage medium can also reside in different components of a user terminal.

[0132] The specific implementation described above is illustrative for carrying out the present application and implementing the purposes and advantages of the application. It is to be understood, however, that the application is not limited to the specific implementation described and is intended to cover any and all modifications, and equivalents, within the spirit and scope of the present application.

Claims

1. An electronic ink display, characterized by Comprise: An electronic ink screen for displaying video pictures, and comprising microcapsules encapsulating color particles, electrodes above and below the microcapsules for applying voltage to the microcapsules to drive the color particles; A display controller for processing received video data in units of pixels or pixel groups comprising a plurality of pixels to obtain to-be-displayed video data, generating driving data based on the to-be-displayed video data and sending to the electronic ink screen to make the electronic ink screen drive the electrodes to apply at most one voltage to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data based on the driving data; A video processor for receiving video source data comprising a plurality of frames from a video source at a preset frame rate, and converting the video source data into video data suitable for display on the electronic ink screen, and providing the video data to the display controller in units of pixels or the pixel groups.

2. An electronic ink display according to claim 1, wherein, The display controller arranges received video data in sequence in units of pixels or the pixel groups, and packs as video data packets as to-be-displayed video data, and generates driving data based on each video data packet as soon as a video data packet is packed and sends to the electronic ink screen to make the electronic ink screen drive the electrodes to apply at most one voltage to the microcapsules corresponding to one or more pixels corresponding to the video data packet based on the driving data, thereby completing display of one or more pixels corresponding to the to-be-displayed video data.

3. An electronic ink display according to claim 2, wherein, Further comprise: A frame data storage for storing first video data of a current frame currently displayed on the electronic ink screen and not yet completed all display, and second video data of a previous frame currently displayed on the electronic ink screen and completed all display, not yet replaced by the video data of the current frame, wherein the second video data comprises third video data, the pixels corresponding to the third video data are the same position pixels as the pixels corresponding to the to-be-displayed video data in the frame thereof, Wherein, the display controller compares the to-be-displayed video data with the third video data, and outputs a comparison result, and generates driving data based on the comparison result, wherein if the comparison result is different, the generated driving data instructs the electronic ink screen to drive the electrodes to apply one voltage to the microcapsules corresponding to one or more pixels corresponding to the to-be-displayed video data; if the comparison result is the same, the generated driving data instructs the electronic ink screen to drive the electrodes to apply one voltage again in the manner of applying the previous voltage.

4. An electronic ink display according to claim 3, wherein, If the comparison result is the same, and the number of consecutive voltage applications of the driving data generated by the display controller instructing the electronic ink screen to drive the electrodes to apply one voltage again in the manner of applying the previous voltage reaches a preset threshold, the generated driving data instructs the electronic ink screen not to drive the electrodes.

5. An electronic ink display according to claim 4, wherein, The display controller comprises: a display engine configured to read the third video data from the second video data stored in the frame data storage based on an index of a pixel in a frame to which the video data to be displayed belongs, compare the video data to be displayed with the read third video data, and output a comparison result; a driving data output module configured to generate the driving data according to the comparison result and send the driving data to the electronic ink screen; a pixel data buffer configured to buffer the video data received from the video processor in units of pixels or the pixel groups, arrange the received video data in sequence, and pack the video data as a video data packet as the video data to be displayed, and provide the video data to the display engine as the video data to be displayed as soon as a video data packet is packed.

6. An electronic ink display according to claim 5, wherein, The display engine writes the video data to be displayed in the frame data storage to replace the third video data in the second video data as part of the first video data.

7. An electronic ink display according to claim 6, wherein, The display engine writes the video data to be displayed in the frame data storage only when the video data to be displayed is different from the third video data for the same pixel according to the comparison result, and retains the third video data for the same pixel, thereby completing the replacement of the third video data and as part of the first video data.

8. An electronic ink display according to any one of claims 1 to 7, wherein, The electronic ink screen drives the electrode to apply a voltage for a duration not exceeding a duration of a frame of video picture corresponding to the frame rate.

9. An electronic ink display according to any one of claims 1 to 7, wherein, The preset frame rate is set to be consistent with a frame rate at which the electronic ink screen display displays video pictures.

10. An electronic ink display according to any one of claims 1 to 7, wherein, The video processor receives video source data including a plurality of frames in units of pixels or the pixel groups from a video source in a preset frame rate in a form of a video stream, converts the video source data into video data with corresponding attributes suitable for display on the electronic ink screen in units of pixels or the pixel groups in sequence, and provides the video data with corresponding attributes to the display controller in units of pixels or the pixel groups in sequence.

Images