CN115762428B - Display device and system based on electronic ink screen - Google Patents
Display device and system based on electronic ink screen Download PDFInfo
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- CN115762428B CN115762428B CN202211480696.3A CN202211480696A CN115762428B CN 115762428 B CN115762428 B CN 115762428B CN 202211480696 A CN202211480696 A CN 202211480696A CN 115762428 B CN115762428 B CN 115762428B
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Abstract
The embodiment of the application discloses a display device and a system based on an electronic ink screen. The technical scheme provided by the embodiment of the application is that the video command receiving module converts the video signal into the video data with the set video format, the control signal is converted into the control command, the data processing module converts the video data into the intermediate sequence frame, the intermediate sequence frame is converted into the driving waveform data in advance according to the control command, and the screen driving module outputs the screen driving signal based on the driving waveform data. According to the application, the video data is converted into the intermediate sequence frame, the intermediate sequence frame is converted into the corresponding driving waveform data according to the control command, the screen driving module outputs the screen driving signal based on the driving waveform data, and the driving waveform data is not required to be generated in real time when the ink screen is required to be driven subsequently, so that the refreshing delay of the ink screen can be effectively reduced, the flexibility of controlling the electronic ink screen is improved, and the display effect of the electronic ink screen is enriched.
Description
Technical Field
The embodiment of the application relates to the technical field of display, in particular to a display device and a system based on an electronic ink screen.
Background
The electronic ink screen achieves a display effect close to that of conventional paper by using an electrophoresis technology, and is therefore also called "electronic paper". The electronic ink screen generally displays images through electronic ink, the electronic ink is usually manufactured into an electronic ink film, the electronic ink film is composed of a large number of microcapsules, and pigment particles with different charges are arranged in the microcapsules. In the initial state, pigment particles are suspended in the microcapsules, and when an electric field in a certain direction is applied, the corresponding pigment particles are pushed to the top, the microcapsules can display different colors, and the microcapsules in different colors form various characters and patterns.
When the display pattern based on the electronic ink screen is controlled, the process of controlling pigment particles to be adsorbed at the bottom or the top of the capsule through an electric field is a physical process, the electronic ink screen can provide a wave form file, a driving Waveform corresponding to an intermediate process required to pass through for displaying the next frame of picture data to be displayed is determined according to the wave form file and the picture currently displayed by the electronic ink screen, and a screen driving module applies different control signals to the electronic ink screen according to the driving Waveform to control the display corresponding picture based on the electronic ink screen. The driving of the ink screen depends on the determination of the driving waveform, and the current driving waveform is generally generated when the ink screen is required to be driven finally, but the driving waveform is generated for longer and longer along with the improvement of the resolution of the ink screen, so that the refreshing delay of the ink screen is prolonged, and the display effect of the electronic ink screen is limited.
Disclosure of Invention
The embodiment of the application provides a display device and a system based on an electronic ink screen, which are used for solving the technical problem that the refreshing delay of the ink screen is prolonged due to longer generation time of a driving waveform in the prior art, effectively reducing the refreshing delay of the ink screen and enriching the display effect of the electronic ink screen.
In a first aspect, an embodiment of the present application provides a display device based on an electronic ink screen, including a video command receiving module, a data processing module, a screen driving module, and a signal conversion module, where:
the video command receiving module is used for acquiring a video signal and converting the video signal into video data with a set video format; the control signal is acquired and converted into a control command;
the data processing module is used for converting the video data into intermediate sequence frames and generating driving waveform data according to the control command and the intermediate sequence frames;
the screen driving module is used for acquiring the driving waveform data from the data processing module and outputting a screen driving signal based on the driving waveform data.
Further, the data processing module includes an image processing unit, a buffer unit, and a processing unit, wherein:
The image processing unit is used for converting the video data into intermediate sequence frames and sending the intermediate sequence frames to the buffer unit;
the processing unit is used for acquiring the intermediate sequence frame from the buffer unit, generating driving waveform data according to the control command and the intermediate sequence frame, and sending the driving waveform data to the buffer unit.
Further, the image processing unit includes an image extraction subunit and an image processing subunit, wherein:
the image extraction subunit is used for extracting image sequence frames from the video data according to the set image extraction frequency and sending the image sequence frames to the image processing subunit;
the image processing subunit is configured to convert the image sequence frame into an intermediate sequence frame, and send the intermediate sequence frame and/or the image sequence frame to the buffer unit, where the intermediate sequence frame is obtained by performing one or more of color space conversion, color gray-scale conversion, image dithering, brightness/contrast/saturation adjustment, color enhancement/filtering, image smoothing/sharpening, cropping, and scaling on the image sequence frame.
Further, the buffer unit includes an image buffer subunit and a data buffer subunit, wherein:
the image buffer subunit is used for storing the intermediate sequence frames provided by the image processing unit;
the data buffer subunit is used for storing the driving waveform data provided by the processing unit.
Further, the processing unit updates the intermediate sequence frame and the driving waveform data in the buffer unit when receiving a control command indicating to update the processing mode and/or the processing step of the image sequence frame, and/or the refresh mode.
Further, the video signal and the control signal are transmitted through a combined signal, when the video command receiving module receives the combined signal, the video command receiving module sends the received combined signal to the image processing unit, and when the image processing unit receives the combined signal sent by the video command receiving module, the video command receiving module separates the video signal and the control signal from the combined signal and sends the separated control command to the processing unit.
Further, the video command receiving module includes a video converting unit and a command parsing converting unit, wherein:
The video conversion unit is used for obtaining a video signal, converting the video signal into video data with a set video format and sending the video data to the data processing module;
the command analysis conversion unit is used for acquiring a control signal, converting the control signal into a control command and sending the control command to the data processing module.
Further, the display device further comprises a signal conversion module, the screen driving module is connected with the signal conversion module, and the signal conversion module is provided with a plurality of signal output interfaces for accessing ink screens with different interface types.
Further, the display device further comprises a temperature sensor, wherein the temperature sensor is used for detecting the temperature of the ink screen connected with the signal conversion module;
the video command receiving module is also used for generating a control command according to the temperature detection signal output by the temperature sensor.
Further, the interface types corresponding to the signal output interface include a TTL interface and/or an LVDS interface, which are used for accessing an ink screen of the TTL interface and/or the LVDS interface.
Further, the control signal is triggered by a user and/or a system, and the control command includes one or more combinations of a refresh mode switching command, an optimization mode switching command, a power consumption mode switching command, a data channel on-off command, an image extraction frequency adjustment command, an algorithm and/or parameter adjustment command, a cache format and/or size adjustment command, a standby state on-off command, a screen timing adjustment command, an output frequency adjustment command, and an output format adjustment command.
In a second aspect, an embodiment of the present application provides an electronic ink screen-based display system, including an ink screen and a display device according to any one of the first aspect, the ink screen being connected to the screen driving module.
According to the embodiment of the application, the video command receiving module is used for converting video signals into video data with a set video format, converting control signals into control commands, the data processing module is used for converting the video data into intermediate sequence frames, the intermediate sequence frames are converted into driving waveform data in advance according to the control commands, and the screen driving module is used for outputting screen driving signals based on the driving waveform data. According to the application, the video data is converted into the intermediate sequence frame, the intermediate sequence frame is converted into the corresponding driving waveform data according to the control command, the screen driving module outputs the screen driving signal based on the driving waveform data, and the driving waveform data is not required to be generated in real time when the ink screen is required to be driven subsequently, so that the refreshing delay of the ink screen can be effectively reduced, the flexibility of controlling the electronic ink screen is improved, and the display effect of the electronic ink screen is enriched.
Drawings
FIG. 1 is a schematic block diagram of a display device based on an electronic ink screen according to an embodiment of the present application;
FIG. 2 is a schematic block diagram of a second electronic ink screen based display device according to an embodiment of the present application;
FIG. 3 is a schematic block diagram of a third electronic ink screen based display device according to an embodiment of the present application;
FIG. 4 is a schematic block diagram of a fourth electronic ink screen-based display device according to an embodiment of the present application;
FIG. 5 is a system block diagram of a display system based on an electronic ink screen provided by an embodiment of the application;
FIG. 6 is a schematic block diagram of a fourth electronic ink screen based display device provided by an embodiment of the present application;
FIG. 7 is a schematic block diagram of a signal conversion module;
fig. 8 is a system block diagram of a second electronic ink screen-based display system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the following detailed description of specific embodiments of the present application is given with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present application are shown in the accompanying drawings. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently, or at the same time. Furthermore, the order of the operations may be rearranged. The above-described process may be terminated when its operations are completed, but may have additional steps not included in the drawings. The processes described above may correspond to methods, functions, procedures, subroutines, and the like.
In describing embodiments of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Fig. 1 is a schematic block diagram of a display device based on an electronic ink screen according to an embodiment of the present application, where, as shown in fig. 1, the display device based on an electronic ink screen (hereinafter referred to as a display device) provided in this embodiment includes a video command receiving module, a data processing module, and a screen driving module. The data processing module is connected with the video command receiving module and the screen driving module.
The video command receiving module is used for acquiring video signals and converting the video signals into video data with a set video format. The video command receiving module is also used for acquiring a control signal and converting the control signal into a control command. The video command receiving module may receive the video signal by a wired (e.g., HDMI line or DP line) and/or wireless (e.g., wireless screen-drop) manner. Likewise, the video command receiving module may receive the control signal by wired and/or wireless means, and the control signal may be a wired signal, a wireless signal, or a key signal (e.g., a key signal triggered by a physical or virtual key provided on the electronic ink screen device).
Further, the data processing module provided by the scheme is used for acquiring video data and a control command from the video command receiving module, converting the video data into an intermediate sequence frame, and generating driving waveform data according to the control command and the intermediate sequence frame. Wherein the intermediate sequence frame may be a gray scale image or a color image. The driving waveform data may be generated based on a waveform file (waveform file), for example, according to a currently displayed picture of the connected ink screen and a picture to be displayed corresponding to the intermediate sequence frame, driving data corresponding to each screen pixel point in each ink screen is determined in the waveform file, and corresponding driving waveform data is generated according to the driving data. Alternatively, different control commands may correspond to different waveform files, the corresponding waveform file may be determined according to the currently received control command, and driving waveform data may be generated based on the determined waveform file and the intermediate sequence frame. The waveform file may be recorded in the form of a waveform Table (LUT).
Further, the screen driving module provided by the scheme can be used for acquiring driving waveform data from the data processing module and outputting a screen driving signal based on the driving waveform data. Optionally, the ink screen may be connected to a screen driving module, and after the screen driving module obtains the driving waveform data from the data processing module, the screen driving module may drive the ink screen to display a corresponding picture based on the driving waveform data.
In one embodiment, the display device provided by the scheme further comprises a power module, wherein the power module is connected with the screen driving module and provides driving voltage required by outputting driving waveforms for the screen driving module. For example, the screen driving module controls the change of the voltage applied to the ink screen by the power supply module according to the voltage and time applied to each screen pixel indicated by the driving waveform data, thereby driving the pixel update of each screen pixel on the ink screen.
It should be explained that in the prior art, when the ink screen needs to be determined, the electronic ink screen is generally driven by the screen driving module according to the target display image and the current screen display image, then the final driving waveform data is obtained by the waveform driving LUT (Look-Up Table), and the ink screen is driven to display based on the driving waveform data, that is, all translation steps (from the video signal to be displayed to the final driving waveform) of the driving ink screen are processed by the screen driving module, the data processing amount of the screen driving module is larger, and as the resolution of the electronic ink screen is improved, the time required for the process of searching the LUT is longer, so that the refresh delay time of the electronic ink screen is increased, especially in the video playing scene, the delay of video playing is larger, and the video playing effect is poorer. According to the display device based on the electronic ink screen, the data processing module can search the LUT table in advance according to the intermediate sequence frame and the current display image of the ink screen based on the LUT table and the control command, drive waveform data are generated in advance, the drive waveform data for driving the ink screen are prepared in advance, when the ink screen needs to be driven, the screen driving module can directly use the cached drive waveform data, real-time table look-up is not needed to generate the drive waveform data when the ink screen is driven, accordingly delay of refreshing of the ink screen is reduced, refreshing speed of the ink screen is improved, delay of video playing can be effectively reduced under a video playing scene, and video playing effect is improved.
The video command receiving module converts the video signal into video data with a set video format and converts the control signal into a control command, the data processing module converts the video data into intermediate sequence frames, the intermediate sequence frames are converted into driving waveform data in advance according to the control command, and the screen driving module outputs a screen driving signal based on the driving waveform data. According to the application, the video data is converted into the intermediate sequence frame, the intermediate sequence frame is converted into the corresponding driving waveform data according to the control command, the screen driving module outputs the screen driving signal based on the driving waveform data, and the driving waveform data is not required to be generated in real time when the ink screen is required to be driven subsequently, so that the refreshing delay of the ink screen can be effectively reduced, the flexibility of controlling the electronic ink screen is improved, and the display effect of the electronic ink screen is enriched.
Fig. 2 is a schematic block diagram of a second display device based on an electronic ink screen according to an embodiment of the present application, where, as shown in fig. 2, the display device based on an electronic ink screen provided in this embodiment (hereinafter referred to as a display device) includes a video command receiving module, a data processing module, a screen driving module, and a signal converting module. The data processing module is connected with the video command receiving module, the screen driving module and the signal conversion module, the signal conversion module is connected with the screen driving module, and the signal conversion module is provided with a signal output interface for accessing the ink screen.
Further, the screen driving module provided by the scheme is used for acquiring driving waveform data from the data processing module and sending a screen driving signal to the signal conversion module based on the driving waveform data. The signal conversion module is used for performing splicing processing on the received screen driving signal and the set time sequence data to obtain a target driving signal and outputting the target driving signal. Optionally, the ink screen may be connected to a signal conversion module (driving waveform signal), and after the screen driving module obtains the driving waveform data from the data processing module, the screen driving module sends a screen driving signal to the signal conversion module, and the signal conversion module splices the screen driving signal and the time sequence data to obtain a target driving signal, so that the ink screen may be driven to display a corresponding picture based on the target driving signal. The time sequence data in the signal conversion module can be provided by the data processing module based on the accessed ink screen. According to the scheme, the time sequence data corresponding to the type of the ink screen is loaded into the signal conversion module, after the processing unit generates the driving waveform data, the processing unit does not need to splice the driving waveform data and the time sequence data locally, but the signal conversion module splices the driving waveform data (screen driving signals) and the corresponding time sequence data according to the ink screen which is required to be driven, so that the data processing pressure of the processing unit is relieved, and the driving effect of the electronic ink screen is guaranteed.
In one embodiment, the display device provided by the scheme further comprises a power module, wherein the power module is connected with the screen driving module and provides driving voltage required by outputting driving waveforms for the screen driving module. For example, the screen driving module sends a screen driving signal to the signal conversion module according to the voltage and time applied to each screen pixel indicated by the driving waveform data, and the signal conversion module controls the change of the voltage applied to the ink screen by the power supply module according to the target driving signal obtained by splicing the screen driving signal and the time sequence data, so that the pixel update of each screen pixel on the ink screen is driven.
The video command receiving module converts the video signal into video data with a set video format and converts the control signal into a control command, the data processing module converts the video data into a middle sequence frame, the middle sequence frame is converted into driving waveform data in advance according to the control command, the screen driving module outputs a screen driving signal based on the driving waveform data, and the signal converting module splices the screen driving signal and the time sequence data to obtain a target driving signal. According to the application, the video data is converted into the intermediate sequence frame, the intermediate sequence frame is converted into the corresponding driving waveform data according to the control command, the screen driving module outputs the screen driving signal based on the driving waveform data, and then the signal conversion module generates the driving waveform data in real time according to the target driving signal obtained by splicing the screen driving signal and the time sequence data, so that the refreshing delay of the ink screen is effectively reduced, the control flexibility of the electronic ink screen is effectively improved, and the display effect of the electronic ink screen is enriched.
Fig. 3 is a schematic block diagram of a third display device based on an electronic ink screen according to an embodiment of the present application, where the display device based on an electronic ink screen according to the present application is further configured on the basis of the display device based on an electronic ink screen according to the foregoing embodiment. As shown in fig. 3, the display device based on the electronic ink screen provided by the present embodiment includes a video command receiving module, a data processing module, a screen driving module, a signal conversion module and a power module.
The data processing module comprises an image processing unit, a buffer unit and a processing unit. The image processing unit is connected with the video command receiving module, the buffer unit and the processing unit, the buffer unit is connected with the processing unit, and the processing unit is connected with the video command receiving module. The image processing unit is used for acquiring video data from the video command receiving module, converting the video data into intermediate sequence frames and sending the intermediate sequence frames to the buffer unit. The processing unit is used for acquiring the intermediate sequence frame from the buffer unit, generating driving waveform data according to the control command and the intermediate sequence frame, and sending the driving waveform data to the buffer unit. The scheme converts video data into intermediate sequence frames through an image processing unit and buffers the intermediate sequence frames in a buffer unit. Compared with the mode that the processing module directly generates the driving data according to the image to be displayed in the prior art, the method and the device have the advantages that the processing unit obtains the intermediate sequence frame from the buffer unit, generates the driving waveform data according to the control command and the intermediate sequence frame, converts the video data into the intermediate sequence frame in advance and caches the intermediate sequence frame, and can obtain the intermediate sequence frame from the buffer unit in real time and generate the corresponding driving waveform data more quickly, so that the driving efficiency of the electronic ink screen is improved.
In one possible embodiment, the image processing unit provided by the present scheme includes an image extraction subunit and an image processing subunit. The image extraction subunit is connected with the video command receiving module, the processing unit and the image processing subunit, and the image processing subunit is connected with the processing unit and the buffer unit.
The image extraction subunit provided by the scheme is used for extracting the image sequence frames from the video data according to the set image extraction frequency and sending the image sequence frames to the image processing subunit. The set image extraction frequency can be provided by the processing unit based on the received control command, and different control commands correspond to different extraction frequencies.
For example, when the requirement for the picture quality of the ink screen display is high, the control signal sent to the video command receiving module may instruct to reduce the frequency of image extraction of the video data, and when the requirement for the picture quality of the ink screen display is low, the control signal sent to the video command receiving module may instruct to increase the frequency of image extraction of the video data, thereby ensuring the picture display quality while ensuring the data processing efficiency. The image extraction frequency may be adjusted by determining a picture frame rate corresponding to the video data and generating different control signals indicating adjustment of the image extraction frequency according to the difference of the picture frame rates.
For example, when the frame rate of the picture is low, the control signal sent to the video command receiving module may instruct to switch the current refresh mode to the global refresh mode, when the frame rate is moderate, the control signal sent to the video command receiving module may instruct to switch the current refresh mode to the local refresh mode, and when the frame rate is high, the control signal sent to the video command receiving module may instruct to switch the current refresh mode to the fast refresh mode, wherein different refresh modes may correspond to different picture extraction frequencies, such as the global refresh mode, the local refresh mode, and the fast refresh mode, which correspond to picture extraction frequencies that increase sequentially. When the video command receiving module receives the control signal, the control signal is converted into a corresponding control command and is sent to the processing unit, and the processing unit can control the image extraction subunit to extract image sequence frames from the video data according to the image extraction frequency corresponding to the control command.
Further, the image processing subunit provided by the scheme is used for converting the image sequence frame provided by the image extraction subunit into an intermediate sequence frame, sending the intermediate sequence frame and/or the image sequence frame to the buffer unit, and buffering the intermediate sequence frame and/or the image sequence frame by the buffer unit. The intermediate sequence frame is obtained by performing one or more of color space conversion (for example, converting a color image into a gray-scale image), color-to-gray-scale, image dithering, brightness/contrast/saturation adjustment, color enhancement/filtering, image smoothing/sharpening, cropping and scaling on the image sequence frame, i.e., the image processing subunit may process the image sequence frame based on an image processing mode corresponding to one or more of color space conversion, color-to-gray-scale, image dithering, brightness/contrast/saturation adjustment, color enhancement/filtering, image smoothing/sharpening, cropping and scaling. Alternatively, different control commands may correspond to different image processing manners, for example, in a case where the requirement on the display quality of the picture is high, the image processing manner corresponding to the control command may be to convert the image sequence frame into a higher gray-scale image, and in a case where the requirement on the refresh rate of the picture is high, the image processing manner corresponding to the control command may be to convert the image sequence frame into a lower gray-scale image. Wherein cropping and scaling of the image sequence frames may be determined based on the display size of the connected ink screen. According to the scheme, the image sequence frames are extracted from the video data according to the set image extraction frequency, the image sequence frames are converted into the intermediate sequence frames corresponding to the ink screen, the processing unit directly generates the driving waveform data according to the intermediate sequence frames, the processing unit does not need to adjust the image of the intermediate sequence frames, the generation efficiency of the driving waveform data is effectively improved, and the driving efficiency of the electronic ink screen is improved.
In one possible embodiment, the buffering unit provided by the scheme comprises an image buffering subunit and a data buffering subunit. The image buffer subunit is connected with the image processing unit (image processing subunit) and the processing unit, and the data buffer subunit is connected with the processing unit and the screen driving module.
The image buffering subunit provided by the scheme is used for storing the intermediate sequence frames provided by the image processing unit (image processing subunit), and the data buffering subunit is used for storing the driving waveform data provided by the processing unit. Further, the screen driving module acquires driving waveform data from the data buffering subunit, and drives the accessed ink screen to display a picture corresponding to the image sequence frame based on the driving waveform data. According to the scheme, the image buffer subunit and the data buffer subunit are used for respectively buffering the intermediate sequence frame and the driving waveform data, the image processing subunit can acquire the intermediate sequence frame from the image buffer subunit in real time to generate the driving waveform data and buffer the generated driving waveform data, the screen driving module can acquire the driving waveform data for driving the ink screen from the data buffer subunit in time, the situation that the screen update is blocked due to the fact that the processing unit is not in time in data processing is reduced, and compared with the mode that the processing unit is required to generate the driving waveform data in real time in the prior art, the data processing pressure of the processing unit is effectively reduced, and the screen update fluency of the electronic ink screen is effectively improved.
In a possible embodiment, the processing unit provided by the present solution, when receiving a control command indicating to update the processing mode and/or the processing step of the image sequence frame and/or the refresh mode (of the connected ink screen), processes the image sequence frame based on the updated processing mode and/or the processing step of the image sequence frame and/or controls the refresh of the ink screen based on the updated refresh mode, and at the same time updates the intermediate sequence frame and the driving waveform data in the buffer unit to adapt to the updated processing mode and/or the processing step of the image sequence frame and/or the refresh mode (of the connected ink screen). It can be understood that when the processing unit receives a new control command indicating to update the buffered data, since the intermediate sequence frame currently stored in the image buffer subunit is generated based on the previous control command, the intermediate sequence frame stored in the image buffer subunit can be updated based on the updated control command, and the corresponding driving waveform data can be updated based on the updated intermediate sequence frame, so as to improve the response speed to the update of the control command.
When the display effect or the refresh mode of the electronic ink screen needs to be updated, the user or the system can send corresponding control information to the video command receiving module according to the target display effect or the target refresh mode which needs to be updated, and the video command receiving module converts the control information into a control command for indicating to update the cache data and sends the control command to the processing unit. After receiving the control command, the processing unit informs the image processing subunit of extracting the intermediate sequence frame from the image buffering subunit, and performs image conversion processing on the intermediate sequence frame according to the image processing mode corresponding to the control command so as to obtain the intermediate sequence frame corresponding to the newly received control command, and sends the intermediate sequence frame to the image buffering subunit for storage. According to the scheme, when the control command for indicating to update the cache data is received, the intermediate sequence frame in the buffer unit is updated, so that the screen driving module can drive the ink screen based on the updated driving waveform data more quickly, the response efficiency of the electronic ink screen in the process of updating the display effect or the refreshing mode is improved, and the user experience is improved.
In one possible embodiment, the video signal and the control signal provided by the scheme can be synchronously transmitted through the combined signal, and can also be respectively sent to the image processing unit and the processing unit. As shown in the schematic block diagram of the fourth electronic ink screen-based display device provided in fig. 4, when the video signal and the control signal are separately transmitted, the video command receiving module provided in this embodiment includes a video converting unit and a command parsing converting unit. The video conversion unit is connected with the image extraction subunit, and the command analysis conversion module is connected with the processing unit. Alternatively, the video conversion module may provide a variety of different video interfaces, such as HDMI interface, DP interface, wireless screen-drop interface, etc., and the command parsing conversion module may provide a wired signal interface and a wireless signal interface for receiving control signals. The video conversion unit is used for acquiring a video signal, converting the video signal into video data with a set video format, and sending the video data to the data processing module (image extraction subunit). The command analysis conversion unit is used for acquiring the control signal, converting the control signal into a control command and sending the control command to the data processing module (processing unit). The scheme transmits the video signal and the control signal through the video conversion unit and the command analysis conversion unit respectively, so that the correct transmission of the video signal and the control signal is effectively ensured, and the electronic ink screen is effectively refreshed in time.
In one possible embodiment, the display device provided in this embodiment further includes a temperature sensor, where the temperature sensor is configured to detect a temperature of the ink screen connected to the signal conversion module and/or the screen driving module, and output a corresponding temperature detection signal. Further, the video command receiving module provided by the scheme is further used for generating a control command according to the temperature detection signal output by the temperature sensor. The command analysis conversion unit in the video command receiving module is connected with a temperature sensor, and detects the temperature of the ink screen through the temperature sensor and obtains a corresponding temperature detection signal. The command analysis conversion unit generates corresponding control commands according to preset corresponding relations between different temperature detection signals and different control commands, and sends the corresponding control commands to the processing unit. The processing unit obtains the intermediate sequence frame from the image buffer subunit, and generates corresponding driving waveform data according to the corresponding waveform file and the intermediate sequence frame. It should be explained that, when the temperature of the ink screen changes, the movement speed of the particles in the microcapsules of the ink screen also changes under the same driving condition, so that the refreshing time of the ink screen changes.
In one possible embodiment, the control signal provided by the scheme may be triggered by a user and/or a system (an operating system corresponding to the electronic ink screen), the control command includes a refresh mode switching command (for indicating to switch a refresh mode), an optimized mode switching command (for indicating to switch a handwriting mode or a video mode), a power consumption mode switching command (for indicating to switch a high power consumption mode or a low power consumption mode), a data channel opening and closing command (for indicating to open or close a video data channel), an image extraction frequency adjustment command (for indicating to adjust an image extraction frequency of the image extraction subunit), an algorithm and/or a parameter adjustment command (for indicating to adjust an algorithm and/or a corresponding parameter of image processing), a buffer format and/or a size adjustment command (for indicating to adjust a format and/or a size of an intermediate sequence frame generated by the image processing subunit), a standby state switching command (for indicating to open or close a standby state of the electronic ink screen, and displaying a set simple screen when the standby state is opened, replacing video information to be sent when the standby state is opened), a screen timing adjustment command (for example, when the ink screen can support various timings, the corresponding timing adjustment command is enabled, i.e. when the data corresponding to the timing adjustment command is stored in the ink screen is not being output in the external clock mode (i.e. the ink screen is not outputting the timing adjustment command) and the data indicating the frequency adjustment command, there are cases where the output data formats are different, the output format corresponding to the driving waveform data may be changed by the output format adjustment command).
For example, a display system or device equipped with a display device based on an electronic ink screen can read source data corresponding to a video signal, calculate the similarity of pictures between adjacent images to be displayed of the source data, and when the pictures corresponding to the video signal provided by the system or device for a long time are all the same picture (the picture whose similarity reaches a first set threshold), send control information indicating switching to a standby state to a command analysis switching unit, and when detecting that a picture fluctuates (the similarity of adjacent pictures is smaller than a second set threshold), send control information switching to a normal state to the command analysis switching unit. Or detecting the manual operation of the user and the setting operation of the system on the picture effect, when the user or the system modifies the picture effect, the control information for adjusting the image processing algorithm/parameter is sent to the command analysis and conversion unit so as to change the buffer format and the size limitation of the intermediate sequence frame, for example, when the user or the system sets the picture display to be high quality, the extraction frequency of the video image is reduced.
According to the scheme, the processing unit and the image processing subunit are instructed to process the intermediate sequence frame and the image sequence frame through different control signals, so that the flexibility of data processing under different use scenes is improved, and the use requirements of different users and different use scenes are met.
In one possible embodiment, the data channels corresponding to the video conversion unit and the command parsing conversion unit may be combined into the same data channel, and the video signal and the control signal are transmitted through the combined signal. When receiving the combined signal, the video command receiving module sends the received combined signal to the image processing unit, and when receiving the combined signal sent by the video command receiving module, the image processing unit separates the video signal and the control signal from the combined signal and sends a control command corresponding to the separated control signal to the processing unit. For example, the image processing unit (image extraction subunit) converts the control signal into a control command recognizable by the processing unit after separating the control signal (for example, the set protocol type (for example, command code) from the combined signal. The combined signal may include a synchronous video signal and a control signal, or may include only a video signal or a control signal. According to the scheme, the video signal and the control signal are combined and transmitted, the video signal and the control signal are separated after reaching the image processing unit, synchronization of the video signal and the control signal is effectively kept, the video signal is processed in real time according to the control command, display confusion caused by data asynchronization is prevented, and wiring difficulty can be effectively reduced through combining the video signal and the signal channel corresponding to the control signal.
Fig. 5 is a system block diagram of a display system based on an electronic ink screen according to an embodiment of the present application, where the display system includes one or more ink screens and a display device according to any of the foregoing embodiments, and the ink screens are connected to a signal conversion module.
When the display system based on the electronic ink screen works, the ink screen is connected to the display system through the signal conversion module, video signals are sent to the video conversion unit in a wired or wireless mode, and standard video data are obtained through format processing. Meanwhile, the command analysis and conversion unit continuously monitors a wired or wireless control signal and converts the wired or wireless control signal into a control command. The standard video data is entered into the image extraction subunit, and the processing unit controls the image extraction subunit to decompose the video data into successive image sequence frames at a set image extraction frequency based on the control command, and delivers the image sequence frames to the image processing subunit. The processing unit controls the image processing subunit to sequentially perform color space conversion on the image sequence frames based on the control command, and performs clipping/scaling operation on the image sequence frames after the color space conversion, or may perform operations such as color conversion gray scale, image dithering, brightness/contrast/saturation adjustment, color enhancement/filtering image smoothing/sharpening on the image sequence frames, and the like, so as to obtain intermediate sequence frames and send the intermediate sequence frames to the image buffering subunit for storage.
The processing unit sequentially reads the intermediate sequence frames in the image buffer subunit, queries the waveform file according to the refresh mode corresponding to the control command, generates driving waveform data corresponding to the intermediate sequence frames, and stores the driving waveform data in the data buffer subunit. If the command analysis conversion unit sends a control command for indicating updating the buffer data to the processing unit, the processing unit limits the image buffer format and the size of the intermediate sequence frame in the updated image buffer subunit. The signal conversion module controls the display work of the ink screen through the target driving signal, and meanwhile, the screen driving module controls the voltage change of the power supply module to drive the pixel update of the ink screen.
The video command receiving module converts the video signal into video data with a set video format and converts the control signal into a control command, the data processing module converts the video data into a middle sequence frame, the middle sequence frame is converted into driving waveform data in advance according to the control command, the screen driving module outputs a screen driving signal based on the driving waveform data, and the signal converting module splices the screen driving signal and the time sequence data to obtain a target driving signal. According to the application, the video data is converted into the intermediate sequence frame, the intermediate sequence frame is converted into the corresponding driving waveform data according to the control command, the screen driving module outputs the screen driving signal based on the driving waveform data, and then the signal conversion module generates the driving waveform data in real time according to the target driving signal obtained by splicing the screen driving signal and the time sequence data, so that the refreshing delay of the ink screen is effectively reduced, the control flexibility of the electronic ink screen is effectively improved, and the display effect of the electronic ink screen is enriched.
Fig. 6 is a schematic block diagram of a fifth electronic ink screen-based display device according to an embodiment of the present application, where the electronic ink screen-based display device according to the present application is further configured on the basis of the electronic ink screen-based display device according to the foregoing embodiment. As shown in fig. 6, the display device based on the electronic ink screen provided by the present embodiment includes a video command receiving module, a data processing module, a screen driving module, a signal conversion module and a power module. The signal conversion module is provided with a plurality of signal output interfaces for accessing ink screens with different interface types, and the screen driving module can access the ink screens with different interface types through the signal conversion module. The interface type corresponding to the signal output interface may be a TTL interface and/or an LVDS interface, and the signal output interface of which the interface type is a TTL interface and/or an LVDS interface in the signal conversion module may be used to access an ink screen of which the interface type is a TTL interface and/or an LVDS interface, respectively.
As shown in the schematic block diagram of a signal conversion module provided in fig. 7, the screen driving module is connected with the signal conversion module, the signal conversion module is provided with a plurality of signal output interfaces for accessing ink screens with different interface types, and the screen driving module can access the ink screens with different interface types through the signal conversion module. Further, the signal conversion module is further provided with a driving signal interface for connecting with the screen driving module and a conversion command interface for connecting with the processing unit.
Optionally, the screen detection unit may acquire an interface position and an interface type of the accessed one or more ink screens, and send the interface position and the interface type of the accessed one or more ink screens to the processing unit, so that the processing unit generates the interface control signal based on the interface position and the interface type.
In one embodiment, the signal conversion module provided by the scheme comprises a screen detection unit and a signal conversion unit, wherein the screen detection unit is connected with each signal output interface and each conversion command interface, and the signal conversion unit is connected with each signal output interface and each driving signal interface. The screen detection unit is used for acquiring the interface positions and the interface types of the accessed one or more ink screens and sending the interface positions and the interface types of the accessed one or more ink screens to the processing unit so that the processing unit can generate interface control signals based on the interface positions and the interface types. The signal conversion unit is used for converting the screen driving signal provided by the screen driving module into one or more target driving signals corresponding to the interface types based on the interface control signal provided by the processing unit, and driving the corresponding ink screen based on the target driving signals. According to the scheme, the plurality of different interface type ink screens are accessed through the signal conversion module, the screen driving signals provided by the screen driving module are converted into the target driving signals corresponding to one or more interface types according to the interface control signals provided by the processing unit, and the accessed ink screens are driven to display corresponding pictures, so that the signal conversion module can drive one or more ink screens simultaneously, and the display effect and the user experience of the electronic ink screens are enriched.
Fig. 8 is a system block diagram of a second electronic ink screen-based display system according to an embodiment of the present application, where the display system includes one or more ink screens and a display device provided in any of the foregoing embodiments, where the display device includes a signal conversion module, and where the ink screens are connected to a signal output interface corresponding to the signal conversion module in the display device.
The video command receiving module is used for acquiring a video signal and converting the video signal into video data with a set video format; and acquiring the control signal and converting the control signal into a control command. The image processing unit is used for converting the video data into intermediate sequence frames and sending the intermediate sequence frames to the buffer unit. The processing unit is used for acquiring the intermediate sequence frame from the buffer unit, generating driving waveform data according to the control command and the intermediate sequence frame, sending the driving waveform data to the buffer unit, generating an interface control signal based on the interface position and the interface type provided by the screen detection unit, and sending the interface control signal to the signal conversion unit. The screen driving module is used for acquiring driving waveform data from the data processing module and outputting a screen driving signal to the signal conversion unit based on the driving waveform data.
When the display system based on the electronic ink screen works, one or more ink screens are connected into the display system through the signal output interface provided by the signal conversion module, video signals are sent to the video conversion unit in a wired or wireless mode, and standard video data are obtained through format processing. Meanwhile, the command analysis and conversion unit continuously monitors a wired or wireless control signal and converts the wired or wireless control signal into a control command. The standard video data is entered into the image extraction subunit, and the processing unit controls the image extraction subunit to decompose the video data into successive image sequence frames at a set image extraction frequency based on the control command, and delivers the image sequence frames to the image processing subunit. The processing unit controls the image processing subunit to sequentially perform color space conversion on the image sequence frames based on the control command, and performs clipping/scaling operation on the image sequence frames after the color space conversion, or may perform operations such as color conversion gray scale, image dithering, brightness/contrast/saturation adjustment, color enhancement/filtering image smoothing/sharpening on the image sequence frames, and the like, so as to obtain intermediate sequence frames and send the intermediate sequence frames to the image buffering subunit for storage.
The processing unit sequentially reads the intermediate sequence frames in the image buffer subunit, queries the waveform file according to the refresh mode corresponding to the control command, generates driving waveform data corresponding to the intermediate sequence frames, and stores the driving waveform data in the data buffer subunit. If the command analysis conversion unit sends a control command for indicating updating the buffer data to the processing unit, the processing unit limits the image buffer format and the size of the intermediate sequence frame in the updated image buffer subunit. The processing unit generates an interface control signal based on the interface position and the interface type provided by the screen detection unit, and sends the interface control signal to the signal conversion unit. The screen driving module is used for acquiring driving waveform data from the data processing module and outputting a screen driving signal to the signal conversion unit based on the driving waveform data.
Meanwhile, a screen detection unit of the signal conversion module acquires the interface positions and the interface types of the accessed one or more ink screens, and sends the interface positions and the interface types of the accessed one or more ink screens to the processing unit. The processing unit generates an interface control signal based on the interface position and the interface type of the detected ink screen access and sends the interface control signal to the signal conversion unit of the signal conversion module. The signal conversion unit of the signal conversion module converts the screen driving signal provided by the screen driving module into a target driving signal corresponding to the interface type of the connected ink screen based on the interface control signal provided by the processing unit, controls the display work of the corresponding ink screen based on the corresponding target driving signal for each signal output interface connected with the ink screen, and simultaneously controls the voltage change of the power supply module to each ink screen to drive the pixel update of the corresponding ink screen.
In one possible embodiment, the interface control signals provided by the scheme include timing data and control commands, and different interface types or ink screens can correspond to different timing data.
When the interface control signal sent to the signal conversion unit by the processing unit is time sequence data, the signal conversion module stores the time sequence data as initialization data in a set storage space of the signal conversion module. When receiving the screen driving signals provided by the screen driving module, the signal conversion unit performs splicing processing on the screen driving signals and time sequence data corresponding to the interface types of the accessed one or more ink screens respectively based on the time sequence data to obtain target driving signals corresponding to the one or more interface types, and sends corresponding target driving signals to each accessed ink screen based on the signal output interfaces corresponding to the different target driving signals, and drives the ink screens corresponding to the different interface types based on the target driving signals.
Optionally, the preset storage position stores time sequence data corresponding to different interface types or ink screens, and the processing unit sends the corresponding time sequence data to the signal conversion module after receiving the interface positions and the interface types of the one or more accessed ink screens fed back by the screen detection unit.
It should be explained that, in the related scheme, when the processing unit generates the driving waveform data, the processing unit needs to further splice the driving waveform data and the time sequence data to obtain the target driving signal, and then send the target driving signal to the screen driving module, so that the calculation amount of the processing unit is large. According to the scheme, time sequence data corresponding to different interface types or ink screen types are loaded into the signal conversion module, after the processing unit generates the driving waveform data, the processing unit does not need to splice the driving waveform data and the time sequence data locally, but the signal conversion module splices the driving waveform data (screen driving signals) and the corresponding time sequence data according to the ink screen which is required to be driven, so that the data processing pressure of the processing unit is relieved, and the driving effect of the electronic ink screen is guaranteed.
When the interface control signal sent to the signal conversion unit by the processing unit is a control command, the signal conversion unit generates one or more control driving signals corresponding to the interface types based on the control command, and sends the corresponding control signals to the corresponding ink screens so as to drive the ink screens corresponding to different interface types based on the control driving signals. Alternatively, the control command may be a command for instructing to control the ink screen to be turned on, sleep, wake up, or completely turned off. In one embodiment, the signal conversion module caches the received time series data, and clears the cached time series data when receiving a control driving signal for indicating that the ink screen is completely closed. When the ink screen needs to be restarted, the processing unit sends a control driving signal for indicating to start the ink screen and corresponding time sequence data to the signal conversion module, and the signal conversion module caches the received data to finish initializing the local time sequence data. The signal conversion module drives the ink screen according to the control command provided by the processing unit, so that flexible control of the ink screen is realized, initialization of time sequence data cached by the signal processing module is correctly completed, and correct control of the ink screen is ensured.
The video command receiving module converts the video signal into video data with a set video format and converts the control signal into a control command, the data processing module converts the video data into a middle sequence frame, the middle sequence frame is converted into driving waveform data in advance according to the control command, the screen driving module outputs a screen driving signal based on the driving waveform data, and the signal converting module splices the screen driving signal and the time sequence data to obtain a target driving signal. According to the application, the video data is converted into the intermediate sequence frame, the intermediate sequence frame is converted into the corresponding driving waveform data according to the control command, the screen driving module outputs the screen driving signal based on the driving waveform data, and then the signal conversion module generates the driving waveform data in real time according to the target driving signal obtained by splicing the screen driving signal and the time sequence data, so that the refreshing delay of the ink screen is effectively reduced, the control flexibility of the electronic ink screen is effectively improved, and the display effect of the electronic ink screen is enriched. Meanwhile, the signal conversion module is connected with a plurality of different interface type ink screens, the screen driving signals provided by the screen driving module are converted into target driving signals corresponding to one or more interface types according to the interface control signals provided by the processing unit, and the connected ink screens are driven to display corresponding pictures, so that the signal conversion module can drive one or more ink screens at the same time, and the display effect and the user experience of the electronic ink screens are enriched.
It should be noted that, in the embodiments of the display device and the display system based on the electronic ink screen, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, so long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the application and the technical principles employed. The present application is not limited to the specific embodiments provided herein, and various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit of the application, the scope of which is set forth in the following claims.
Claims (11)
1. The display device based on the electronic ink screen is characterized by comprising a video command receiving module, a data processing module, a screen driving module and a signal conversion module, wherein the data processing module comprises an image processing unit, a buffer unit and a processing unit, and the display device comprises a display device body, wherein the display device body comprises a display device body, a display device body and a display device body, the display device body comprises a video command receiving module, a data processing module, a screen driving module and a display device body, and a signal conversion module, wherein the data processing module comprises an image processing unit, a buffer unit and a processing unit, and the processing unit, wherein:
The video command receiving module is used for acquiring a video signal and converting the video signal into video data with a set video format; the control signal is acquired and converted into a control command;
the data processing module is used for converting the video data into intermediate sequence frames, generating driving waveform data according to the control command and the intermediate sequence frames, wherein the data processing module comprises an image processing unit which is used for converting the video data into intermediate sequence frames and sending the intermediate sequence frames to the buffer unit, and a processing unit which is used for acquiring the intermediate sequence frames from the buffer unit, generating the driving waveform data according to the control command and the intermediate sequence frames and sending the driving waveform data to the buffer unit;
the screen driving module is used for acquiring the driving waveform data from the data processing module and outputting a screen driving signal based on the driving waveform data.
2. The electronic ink screen-based display device of claim 1, wherein the image processing unit comprises an image extraction subunit and an image processing subunit, wherein:
The image extraction subunit is used for extracting image sequence frames from the video data according to the set image extraction frequency and sending the image sequence frames to the image processing subunit;
the image processing subunit is configured to convert the image sequence frame into an intermediate sequence frame, and send the intermediate sequence frame and/or the image sequence frame to the buffer unit, where the intermediate sequence frame is obtained by performing one or more of color space conversion, color gray-scale conversion, image dithering, brightness/contrast/saturation adjustment, color enhancement/filtering, image smoothing/sharpening, cropping, and scaling on the image sequence frame.
3. The electronic ink screen based display device of claim 1, wherein the buffer unit includes an image buffer subunit and a data buffer subunit, wherein:
the image buffer subunit is used for storing the intermediate sequence frames provided by the image processing unit;
the data buffer subunit is used for storing the driving waveform data provided by the processing unit.
4. The electronic ink screen based display device according to claim 1, wherein the processing unit updates the intermediate sequence frame and the driving waveform data in the buffer unit upon receiving a control command indicating to update a processing manner and/or a processing step of an image sequence frame, and/or a refresh mode.
5. The electronic ink screen-based display device of claim 1, wherein the video signal and the control signal are transmitted through a combined signal, the video command receiving module transmits the received combined signal to the image processing unit when receiving the combined signal, and the image processing unit separates the video signal and the control signal from the combined signal and transmits the separated control command to the processing unit when receiving the combined signal transmitted by the video command receiving module.
6. The electronic ink screen based display device of claim 1, wherein the video command receiving module comprises a video conversion unit and a command parsing conversion unit, wherein:
the video conversion unit is used for obtaining a video signal, converting the video signal into video data with a set video format and sending the video data to the data processing module;
the command analysis conversion unit is used for acquiring a control signal, converting the control signal into a control command and sending the control command to the data processing module.
7. The electronic ink screen-based display device of claim 1, further comprising a signal conversion module, wherein the screen driving module is connected to the signal conversion module, and wherein the signal conversion module is provided with a plurality of signal output interfaces for accessing ink screens of different interface types.
8. The electronic ink screen-based display device of claim 7, further comprising a temperature sensor for detecting a temperature of an ink screen to which the signal conversion module is connected;
the video command receiving module is also used for generating a control command according to the temperature detection signal output by the temperature sensor.
9. The electronic ink screen based display device of claim 7, wherein the interface type corresponding to the signal output interface includes a TTL interface and/or an LVDS interface, and the ink screen is used for accessing the TTL interface and/or the LVDS interface.
10. The electronic ink screen based display device of claim 1, wherein the control signals are triggered by a user and/or a system, the control commands comprising a combination of one or more of refresh mode switch commands, optimize mode switch commands, power consumption mode switch commands, data channel on/off commands, image extraction frequency adjustment commands, algorithm and/or parameter adjustment commands, buffer format and/or size adjustment commands, standby state on/off commands, screen timing adjustment commands, output frequency adjustment commands, output format adjustment commands.
11. An electronic ink screen based display system comprising an ink screen and a display device according to any one of claims 1-10, the ink screen being coupled to the screen drive module.
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