CN115862556B - Driving method and device of electronic ink screen, display equipment and storage medium - Google Patents
Driving method and device of electronic ink screen, display equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses a driving method and device of an electronic ink screen, display equipment and a storage medium. Comparing the image information of the current display picture with the image information of the picture to be displayed to obtain the pixel type and the distribution information of the picture to be displayed; the types of pixels constituting a picture to be displayed are classified into a plurality of types according to a change state and a driving state; each pixel confirms a corresponding driving waveform according to the current refreshing mode; and applying corresponding waveforms to the pixels according to the distribution information, so that a display target matched with the type is realized, wherein the display of the pixel points corresponding to the pixels of the changed screen is started, the pixel points corresponding to the pixels adjacent to the pixels of the changed screen can resist disturbance, and the pixel points in the compensation stage can compensate for optimal display. The scheme avoids redundant outlines and residual shadows from appearing outside normal display contents when the electronic ink screen is displayed.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a driving method and device of an electronic ink screen, display equipment and a storage medium.
Background
In general, an electronic ink screen sets a liquid containing color particles in an ink capsule, and electrodes are respectively disposed at two sides of the ink capsule, where the color particles include positively charged white particles and negatively charged black particles, and when a voltage difference is generated between the two electrodes, the color particles are respectively attracted and repelled due to a polarity effect of the voltage difference, which is equivalent to forming an electric field between the two electrodes, and the two electrodes serve as two poles of the electric field, so that the color particles can move from one electrode to the other electrode, and in this way, each pixel point can display white or black, so as to realize black-white display of content.
In order to control the change of the ink capsule corresponding to each pixel to obtain the expected pixel gray value, the prior art sends a driving pulse to a display controller of the electronic ink screen to control the pixel point to reach the expected pixel gray value, wherein the driving pulse comprises a change signal of the voltage difference (driving voltage) between the electrodes on two sides of the ink capsule and the duration time (represented by a frame form) of the change signal, and the display controller controls the ink capsule according to the driving pulse to change the pixel gray value.
The electronic ink screen is a bistable electrophoretic display device adopting a reflective display principle, so that the electronic ink screen can keep an original display picture for a long time after a driving voltage is removed. Meanwhile, the electronic ink screen adopts a reflective display principle and displays content by reflecting ambient light, so the electronic ink screen is also called electronic paper and is widely used for electronic readers, mobile terminal display screens or computer displays.
In the process of actually controlling the electronic ink screen to display, errors can occur in the movement of the color particles due to various reasons, and the color particles cannot move to the designated positions exactly as desired by a user, so that the common afterimage phenomenon of the electronic ink screen can be caused. For example, since the electronic ink screen is composed of a plurality of closely arranged ink capsules, there is a problem of electric field crosstalk between adjacent ink capsules, that is, an electric field formed by two electrodes corresponding to one ink capsule does not completely restrict the color particles in the one ink capsule, and when the color particles in one ink capsule move under the action of the electric field, weak electric fields occur in the adjacent ink capsules, and unexpected movement of the color particles occurs. Therefore, when the electronic ink screen displays images, the range of actual influence in the electronic ink screen is larger than the expected range corresponding to the images to be displayed according to the display control electric field generated by the components of the images to be displayed; when the screen needs to be refreshed and the original image component is eliminated, the outline (the part with increased display area) of the eliminated image component is left in the screen, and unexpected afterimages appear.
Disclosure of Invention
The invention provides a driving method, a driving device, display equipment and a storage medium of an electronic ink screen, which are used for solving the technical problems of redundant outline and residual shadow when the electronic ink screen is displayed.
In a first aspect, an embodiment of the present invention provides a driving method of an electronic ink screen, configured to set a display device of the electronic ink screen, where the driving method includes:
comparing the image information of the current display picture with the image information of a picture to be displayed to obtain pixel type and distribution information of the picture to be displayed, wherein the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changing screen pixel, the second screen pixel is a screen pixel with the minimum distance from the first screen pixel within a preset range, and the third screen pixel is a pixel in a compensation stage;
confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode;
applying a first waveform to the pixel point corresponding to the first screen pixel according to the distribution information so as to present an area picture corresponding to the first screen pixel; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel.
Wherein the second waveform includes an anti-disturbance phase and a second hold phase.
Wherein the third waveform includes a compensated refresh phase and a third hold phase.
Wherein, the driving method further comprises:
counting waveform state parameters corresponding to each second screen pixel and each third screen pixel;
and resetting, refreshing and displaying the pixel point when the waveform state parameter of any pixel point is confirmed to meet the preset screen maintenance condition.
Wherein the screen maintenance condition includes at least one of the following conditions:
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated duration of the second screen pixel in the anti-disturbance stage and/or the second holding stage reaches a corresponding preset duration threshold, or the accumulated duration of the third screen pixel in the compensation refreshing stage and/or the third holding stage reaches a corresponding preset duration threshold;
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated times of the second screen pixel entering an anti-disturbance stage and/or a second holding stage reach corresponding preset times thresholds, or the accumulated times of the third screen pixel entering a compensation refreshing stage and/or a third holding stage reach corresponding preset times thresholds;
And the image refreshing times of the electronic ink screen reach a preset refreshing threshold value.
The second waveform comprises a plurality of anti-disturbance phases and a plurality of second holding phases which are arranged at intervals, and the third waveform comprises a plurality of compensation refreshing phases and a plurality of third holding phases which are arranged at intervals.
The first screen pixels and the second screen pixels are divided into a plurality of refreshing areas according to the distribution information, and the refreshing areas sequentially apply corresponding second waveforms or third waveforms.
Wherein the refresh parameters corresponding to different refresh regions are different.
In a second aspect, an embodiment of the present invention further provides a driving device for an electronic ink screen, where the driving device is used for setting a display device of the electronic ink screen, and the driving device includes:
the image comparison unit is used for comparing the image information of the current display picture with the image information of the picture to be displayed to obtain the pixel type and the distribution information of the picture to be displayed, wherein the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changing screen pixel, the second screen pixel is a screen pixel with the minimum distance from the first screen pixel within a preset range, and the third screen pixel is a pixel in a compensation stage;
The waveform generation unit is used for confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode;
the display driving unit is used for correspondingly applying a first waveform to the pixel points corresponding to the first screen pixels according to the distribution information so as to present the area picture corresponding to the first screen pixels; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel.
Wherein the second waveform includes an anti-disturbance phase and a second hold phase.
Wherein the third waveform includes a compensated refresh phase and a third hold phase.
Wherein, drive arrangement still includes:
the parameter confirmation unit is used for counting waveform state parameters corresponding to each second screen pixel and each third screen pixel;
and the pixel point resetting unit is used for resetting, refreshing and displaying the pixel point when the waveform state parameter of any pixel point meets the preset screen maintenance condition.
Wherein the screen maintenance condition includes at least one of the following conditions:
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated duration of the second screen pixel in the anti-disturbance stage and/or the second holding stage reaches a corresponding preset duration threshold, or the accumulated duration of the third screen pixel in the compensation refreshing stage and/or the third holding stage reaches a corresponding preset duration threshold;
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated times of the second screen pixel entering an anti-disturbance stage and/or a second holding stage reach corresponding preset times thresholds, or the accumulated times of the third screen pixel entering a compensation refreshing stage and/or a third holding stage reach corresponding preset times thresholds;
and the image refreshing times of the electronic ink screen reach a preset refreshing threshold value.
The second waveform comprises a plurality of anti-disturbance phases and a plurality of second holding phases which are arranged at intervals, and the third waveform comprises a plurality of compensation refreshing phases and a plurality of third holding phases which are arranged at intervals.
The second screen pixels and the third screen pixels are divided into a plurality of refreshing areas according to the distribution information, and the refreshing areas sequentially apply corresponding second waveforms or third waveforms.
Wherein the refresh parameters corresponding to different refresh regions are different.
In a third aspect, an embodiment of the present invention further provides a display apparatus, including:
an electronic ink screen;
one or more processors;
a memory for storing one or more computer programs;
when the one or more computer programs are executed by the one or more processors, the electronic device is caused to implement the method of driving an electronic ink screen as described in any of the first aspects.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the driving method of the electronic ink screen according to any one of the first aspects.
The driving method, the driving device, the display equipment and the storage medium of the electronic ink screen are characterized in that in the driving method, image information of a current display picture and image information of a picture to be displayed are compared to obtain pixel types and distribution information of the picture to be displayed, and the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changing screen pixel, the second screen pixel is a screen pixel with the minimum distance from the first screen pixel within a preset range, and the third screen pixel is a pixel in a compensation stage; confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode; applying a first waveform to the pixel point corresponding to the first screen pixel according to the distribution information so as to present an area picture corresponding to the first screen pixel; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel. By comparing the picture to be displayed and the current display picture, the fact that the current display picture does not need to be changed is confirmed, however, the second screen pixels which are possibly disturbed by electric fields corresponding to other pixel points during picture refreshing are generated and applied correspondingly, the second waveform for resisting disturbance is generated and applied correspondingly, the second screen pixels keep the original display effect, all the pixel points are driven according to the corresponding display or compensation state, redundant outlines and residual shadows are prevented from being generated outside normal display contents when the electronic ink screen is displayed, and the display effect is improved.
Drawings
Fig. 1 is a method flowchart of a driving method of an electronic ink screen according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a driving device of an electronic ink screen according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are for purposes of illustration and not of limitation. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
It should be noted that, for the sake of brevity, this specification is not exhaustive of all of the alternative embodiments, and after reading this specification, one skilled in the art will appreciate that any combination of features may constitute an alternative embodiment as long as the features do not contradict each other.
The following describes various embodiments of the present invention in detail.
Fig. 1 is a flowchart of a method for driving an electronic ink screen according to an embodiment of the present invention, where the method for driving an electronic ink screen is applied to a display device provided with an electronic ink screen, and is implemented by the display device, for example, a mobile terminal, a tablet computer, or a personal computer. As shown in fig. 1, the driving method includes steps S110 to S140:
Step S110: comparing the image information of the current display picture with the image information of a picture to be displayed to obtain pixel type and distribution information of the picture to be displayed, wherein the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a variable screen pixel, the second screen pixel is a screen pixel with a minimum distance from the first screen pixel within a preset range, and the third screen pixel is a pixel in a compensation stage.
In electronic ink screen based displays, when a new screen (i.e., a screen to be displayed) needs to be presented, the original screen (i.e., the currently displayed screen) needs to be refreshed. The image information of the display picture is actually an array formed by a plurality of pixels, the image information of the picture to be displayed and the image information of the current display picture are overlapped and compared, a single pixel in the picture to be displayed can correspond to the same pixel in the current display picture or can correspond to the same pixel in the current display picture, the pixels in the picture to be displayed are classified according to the method, because the pixels in the picture are actually displayed by the pixel points of the electronic ink screen, the same pixels are defined as unchanged screen pixels, and different pixels are defined as first screen pixels. Depending on the variation that may be present, there may be only one of the unchanged screen pixels and the first screen pixels in the picture to be displayed, or the unchanged screen pixels and the first screen pixels may be simultaneously. If there are only unchanged screen pixels, all pixel points continue to remain, and if there are only first screen pixels, all pixel points are all refreshed.
The scheme aims at the situation that the current display picture is taken as a reference, and the unchanged screen pixels and the first screen pixels can be obtained in the picture to be displayed. It will be appreciated that the pixel value (which may be a grey value or a colour value) of the unchanged screen pixel, i.e. the image pixel, does not change, and correspondingly the pixel value (which may be a grey value or a colour value) of the first screen pixel, i.e. the image pixel, changes.
In the specific implementation process of the scheme, the unchanged screen pixels can be further screened according to different dividing dimensions, and the second screen pixels and the third screen pixels in the unchanged screen pixels can be confirmed. The second screen pixel may be a constant screen pixel, i.e. a pixel adjacent to the first screen pixel, i.e. the second screen pixel may be considered to form a contour of the first screen pixel, whereas the adjacent range may be adjustable or configurable. For example, the unchanged screen pixel may be a background pixel of the first screen pixel. The image content corresponding to the screen pixels mentioned herein may be elements such as pictures, tables, text, and the like.
The unit of the preset range regarding the adjacent pixel distance may be in units of pixels, and of course, the width of the adjacent range size is not necessarily one pixel, and the width may be adjusted by a user or configured by a system. It can be understood that the size of the adjacent range determines the number of pixels of the second screen and determines the range of ghost elimination, and the size of the adjacent range can be adjusted according to the screen information or the operation information input by the user, so that the application range of the scheme can be enlarged, and the ghost elimination strategy is more targeted and intelligent.
In the electronic ink screen, the movement of the color particles may be unpredictable, which may cause problems such as ghost, low display definition, and low contrast. Particularly, in the fast refresh mode of A2, DU4, etc., in order to make the color particles move fast, the driving voltage may be insufficient, so that some of the color particles do not move to the expected position (for example, in the A2 mode, the refreshed color particles are expected to move to the limit position, and thus the pixel appears black or white), which may cause problems of low definition, low contrast, etc. In the conventional refreshing process, a part of unchanged screen pixels are refreshed (of course, the current refreshing will not change), so as to avoid the problem of reduced display quality of the picture, the part of unchanged screen pixels can be compensated. And applying a third waveform to the third screen pixel, wherein the compensation refreshing stage of the third waveform is used for enabling the actual display effect of the third screen pixel to be close to the original expected display effect, and increasing the contrast and saturation of the pixel color at the same time, so that the picture quality is improved.
For example, after a certain screen pixel is refreshed to black in the above-mentioned fast refresh mode, the gray value of the screen pixel may not reach the expected gray value (for example, the gray value is 0), the screen pixel is displayed in a light gray, and in the subsequent display process, a driving voltage may be continuously applied to the screen pixel, so that the gray value of the screen pixel is slowly adjusted to the expected gray value, and this adjustment may require multiple frame periods.
In a particular implementation, pixels adjacent to a first screen pixel may meet both classification criteria, and thus be both a second screen pixel and a third screen pixel. It should be noted that the second screen pixel and the third screen pixel are selected from the unchanged screen pixels, and only the processing object identified based on the design of the present solution does not represent that each unchanged screen pixel is necessarily corresponding to one or both of the second screen pixel and the third screen pixel.
Step S120: and confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode.
In the driving method, a driving waveform corresponding to a first screen pixel is matched from a Look-Up Table (LUT) stored in a display device according to a current screen refresh mode, and herein, for convenience of distinction, a waveform for driving the first screen pixel to refresh and display a new image component is defined as a first waveform. However, as mentioned in the background art, the applicant has found that when the first screen pixel is refreshed, the adjacent unchanged screen pixels around the first screen pixel may have a ghost image due to the electric field crosstalk problem. In order to eliminate or weaken the afterimage before the next picture refreshing, the scheme applies a second waveform to the adjacent second screen pixels around the first screen pixels while refreshing the first screen pixels, wherein the anti-disturbance stage of the second waveform is used for resisting the influence of electric field crosstalk on the movement of color particles, so that the second screen pixels display the original display effect (the original color value, the original gray value or the original color component) and the display equipment keeps the original image components. Similarly, a third waveform is validated for a third screen pixel. If one pixel is both the second screen pixel and the third screen pixel, it is possible to confirm both the second waveform and the third waveform.
The scheme can be used in a plurality of refresh modes, and is applicable to the refresh modes, the future available refresh modes and other refresh modes. It will be appreciated that the refresh mode may be different for the same electronic ink screen and the resulting drive waveforms (e.g., first waveforms) that match the screen pixels to be refreshed (e.g., first screen pixels) may be different.
Because the first screen pixel is refreshed by the first waveform, the second screen pixel adjacent to the first screen pixel will appear ghost due to the electric field crosstalk, and the second waveform will be used to eliminate the ghost phenomenon of the second screen pixel. Thus, in essence, the matching of the second waveform is affected by the first waveform, and at least the immunity phase of the second waveform is associated with the first waveform. In other words, the refresh mode, the matching of the first waveform, and the matching of the second waveform have an association relationship.
The specific second waveform may be an anti-disturbance waveform of fixed setting, or may be a waveform corresponding to near cancellation crosstalk determined according to the adjacent first screen pixels, which is not limited in particular. The third waveform is checked according to a predetermined compensation strategy.
Step S130: applying a first waveform to the pixel point corresponding to the first screen pixel according to the distribution information so as to present an area picture corresponding to the first screen pixel; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel.
The second waveform of anti-disturbance is applied to the second screen pixel, and the driving voltage is applied to the ink capsule corresponding to the second screen pixel, so that the second screen pixel can resist the crosstalk generated when the adjacent pixel applies the driving voltage based on the first waveform, and the original display effect is presented. For example, if the original gray value of a certain second screen pixel is FF (displayed as white), and the adjacent first screen pixel is refreshed and then is set to black, the second screen pixel may be displayed as gray due to electric field crosstalk, so that a disturbance waveform needs to be applied to the second screen pixel, so that the second screen pixel continues to keep white. Because the second screen pixel may be formed as a part of the ghost due to the refresh of the first screen pixel if the crosstalk is left, the ghost can be prevented from occurring by applying an anti-disturbance waveform to the second screen pixel, which causes it to exhibit the original display effect.
When the corresponding waveforms are applied to the pixels of each screen, the whole display quality of the picture needs to be considered, and the phenomenon of screen display is avoided, so that the selection of the second waveform also needs to be matched by referring to the first waveform, and the property of the second waveform is close to that of the first waveform.
The fixed settings of the second waveform and the third waveform may store their corresponding sets of anti-tamper phase waveforms in a storage medium of the display device. In addition, since the second screen pixel and the third screen pixel differ in pixel type, the second waveform and the third waveform corresponding to the same pixel value (color value or gray value) must be different for the second screen pixel and the third screen pixel. Moreover, for two screen pixels belonging to the same pixel type but differing in pixel value, their corresponding waveforms may be different. And in the case that the same pixel corresponds to the second waveform and the third waveform, the second waveform and the third waveform are overlapped or sequentially applied to drive.
In order to ensure the display effect of the display picture, the second waveform comprises an anti-disturbance stage and a second holding stage, and the waveform voltage corresponding to the anti-disturbance stage is different from the waveform voltage corresponding to the second holding stage. The third waveform comprises a compensation refreshing stage and a third holding stage, and the waveform voltage corresponding to the compensation refreshing stage is different from the waveform voltage corresponding to the third holding stage. By dividing the second waveform and the third waveform into a driving stage and a holding stage, corresponding driving and holding are realized at different voltages, for example, driving is realized at a non-zero voltage stage, and the original display effect is maintained at a zero voltage stage. In practice, there may be no hold phase as an alternative implementation. Of course, the waveform voltages of the anti-disturbance stage and the second holding stage may be the same, and the waveform voltages of the compensation refresh stage and the third holding stage may be the same.
In the case of performing the disturbance rejection based on the second waveform in particular, the timing of actual disturbance rejection is determined by the disturbance rejection phase in the second waveform, and if there is a hold phase, an electric field that causes the color particles to move is not generated. For the moment that the second screen pixel enters the anti-disturbance stage, the second screen pixel needs to be performed in a state of no perception of the user as much as possible, and the flicker phenomenon is reduced as much as possible, so that the picture is continuously optimized among the unconsciousness of the user. For this purpose, on the one hand, the timing of the second screen pixel entering the perturbation phase may be started from the beginning of the single refresh or after the refresh. On the other hand, the second screen pixel (such as the second screen pixel) enters the perturbation phase by judging whether the picture is static or not, if so. For example, for continuously played frames, according to the next frame refreshing time, whether the duration from the next refreshing time exceeds the first preset duration or not can be judged, if so, the frames are judged to be still; for another example, when the duration from the last refresh exceeds the second preset duration, the picture is judged to be still.
Electronic ink screens are commonly used in display devices, which may be portable mobile terminals such as electronic book readers, PC computer displays, televisions, tablet computers, cell phones, and the like. When the display device is used for reading books or periodicals, there is a case where a still picture (as compared with a use scene in which a video is played) is displayed for a long time, and when the method is used in such a use scene, the picture display quality can be continuously optimized among the user unconsciousness during the picture display.
In the driving process of specifically performing disturbance rejection and compensation, the second waveform and the third waveform may be periodic, and the respective second waveforms may include a plurality of disturbance rejection stages and a plurality of second sustain stages arranged at intervals, and the third waveform may include a plurality of compensation refresh stages and a plurality of third sustain stages arranged at intervals. Through the waveform design of a plurality of anti-disturbance stages and a compensation refreshing stage, the ghost can be eliminated step by step, the contrast is enhanced, and the user viewing experience is improved.
The first screen pixels and the second screen pixels are divided into a plurality of refreshing areas according to the distribution information, and the refreshing areas sequentially apply corresponding second waveforms or third waveforms. Wherein the refresh parameters corresponding to different refresh regions may be different.
The waveform is applied to the second screen pixel or the second screen pixel, which is equivalent to continuously refreshing the area with unchanged picture, continuously improving the picture quality or maintaining the picture quality, and eliminating the afterimage. In order to prevent the continuous refreshing process from affecting the user and reduce the occurrence of flickering, a refreshing design of the partial refreshing area is further adopted. The second screen pixel and the third screen pixel are divided into a plurality of refresh areas, and the refresh areas can be rectangular, annular, etc., of course, the refresh areas can also be irregular, and the specific shape is not limited herein. The refresh sequence of the refresh area (or the sequence of applying a frame of disturbance voltage) may be top-down or bottom-up, may be inside-out or outside-in, or may be sequential refresh between the spaced pixels, or even a combination of the above.
The selection of the refresh areas and the sequence can be manually controlled by a user, namely the refresh policy can be adjusted according to the input information of the user, and on the other hand, the targeted configuration can be carried out according to the screen parameters (namely each kind of screen has a corresponding regional refresh policy), in other words, the control module can automatically match the refresh policy according to the acquired screen information, and then the refresh policy is configured.
The refresh parameters (voltage of the disturbance stage, period of the second waveform or the third waveform, duration of the disturbance-rejection stage of the second waveform or the third waveform, number of frames of applied voltage within the duration, number of times that the unchanged pixels repeatedly start the disturbance stage, adjacent range size) of each refresh region may be uniform, that is, the same refresh parameters are actually used for the whole screen; the refresh parameters of each refresh area may be configured to be inconsistent, for example, for a still image component with a relatively high definition requirement, where the number of frames in the continuous application time is relatively large or the continuous application time is relatively long among the refresh parameters of the unchanged screen pixels of the corresponding area.
The method comprises the steps that when the established display of a display picture is completed through an electronic ink screen, waveform state parameters corresponding to each second screen pixel and each third screen pixel can be counted; and resetting, refreshing and displaying the pixel point when the waveform state parameter of any pixel point is confirmed to meet the preset screen maintenance condition. The screen maintenance conditions include at least one of the following conditions: the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated duration of the second screen pixel in the anti-disturbance stage and/or the second holding stage reaches a corresponding preset duration threshold, or the accumulated duration of the third screen pixel in the compensation refreshing stage and/or the third holding stage reaches a corresponding preset duration threshold; the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated times of the second screen pixel entering an anti-disturbance stage and/or a second holding stage reach corresponding preset times thresholds, or the accumulated times of the third screen pixel entering a compensation refreshing stage and/or a third holding stage reach corresponding preset times thresholds; and the image refreshing times of the electronic ink screen reach a preset refreshing threshold value. The reset refreshing mainly moves the color particles to the limit position (black or white is set by the pixel color value or the gray value), clears the picture content, and then redisplays the picture content. The reset refresh mode may be configured by a user, or an INIT (initialization) refresh mode may be used.
In this scheme, various parameters in the driving process can be triggered by a user or automatically configured by the system according to screen information. For example, the second waveform (or the third waveform) may be a different waveform sequence in each period, and the maintaining the pixel value of the second screen pixel or the third screen pixel is a continuous process, and the waveform sequence in each period may be adaptively adjusted according to the actual requirement, and the adjustment may be triggered by a user or automatically configured by the system. The period of adjusting the second waveform and the third waveform may be a period of adjusting the second screen pixel or the third screen pixel to initiate an anti-disturbance phase, initiate a compensation refresh phase, or initiate a corresponding hold phase or initiate a maintenance phase. In addition to the adjustment of the number of times the second screen pixel repeatedly activates the anti-disturbance stage and the third screen pixel repeatedly activates the compensation, the adjustment of the number of times the second screen pixel and the third screen pixel repeatedly activates the hold stage or activates the maintenance stage may be further included. In addition to adjusting the duration of the anti-disturbance phase of the second or third waveform, adjusting the duration of the hold phase (or maintenance phase) of the second or third waveform may further comprise.
The user can also perform input operation according to the expected degree of optimization of the screen display, and the control module of the electronic ink screen can adjust or configure one or more of the parameters according to the applicability of the operation information input by the user. For example, the longer the duration of application and/or the more frames the duration of application, the higher the picture quality and the less the ghost.
Of course, the user can also turn on or off the function of "the waveform of the second screen pixel can enter the disturbance stage" by inputting an operation instruction. It is correspondingly also possible to configure whether the compensation function for the third screen pixel is activated.
The screen information may be configuration information (such as hardware configuration information and hardware configuration parameters) of the screen module, where the configuration information may be preset at the departure or the device is rewritten during upgrading, the screen module may set a corresponding data interface for the control module to read the screen information, the control module configures parameters such as voltage, period, duration of application, etc. of the corresponding anti-disturbance waveform according to the read screen information, in other words, each kind of screen module has a corresponding parameter configuration scheme, and the control module of the electronic ink screen may perform automatic configuration according to the screen information of the screen module.
In addition, it should be noted that, in the solution, the black-and-white color particles are exemplarily described, which does not indicate that the black-and-white electronic ink screen is the only implementation basis, and the electronic ink screen with more than three color particles also begins to serve as the implementation basis of the present invention, so that the overall display principle is the same, and no description is given here.
In the driving method of the electronic ink screen, comparing the image information of the current display picture with the image information of the picture to be displayed to obtain the pixel type and the distribution information of the picture to be displayed, wherein the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changing screen pixel, the second screen pixel is a screen pixel with the minimum distance from the first screen pixel within a preset range, and the third screen pixel is a pixel in a compensation stage; confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode; applying a first waveform to the pixel point corresponding to the first screen pixel according to the distribution information so as to present an area picture corresponding to the first screen pixel; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel. By comparing the picture to be displayed and the current display picture, the fact that the current display picture does not need to be changed is confirmed, however, the second screen pixels which are possibly disturbed by electric fields corresponding to other pixel points during picture refreshing are generated and applied correspondingly, the second waveform for resisting disturbance is generated and applied correspondingly, the second screen pixels keep the original display effect, all the pixel points are driven according to the corresponding display or compensation state, redundant outlines and residual shadows are prevented from being generated outside normal display contents when the electronic ink screen is displayed, and the display effect is improved.
Fig. 2 is a schematic structural diagram of a driving device of an electronic ink screen according to an embodiment of the present invention. The driving device of the electronic ink screen is used for setting display equipment of the electronic ink screen. As shown in fig. 2, the driving apparatus includes an image comparing unit 210, a waveform generating unit 220, and a display driving unit 230.
The image comparing unit 210 is configured to compare image information of a current display frame with image information of a frame to be displayed, to obtain pixel type and distribution information of the frame to be displayed, where the frame to be displayed includes at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changing screen pixel, the second screen pixel is a screen pixel with the minimum distance from the first screen pixel within a preset range, and the third screen pixel is a pixel in a compensation stage; a waveform generating unit 220, configured to confirm, according to a current refresh mode, a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel, and a third waveform corresponding to a third screen pixel; a display driving unit 230, configured to apply a first waveform to a pixel point corresponding to the first screen pixel according to the distribution information, so as to present an area picture corresponding to the first screen pixel; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel.
On the basis of the above embodiment, the second waveform includes an anti-disturbance phase and a second hold phase.
On the basis of the above embodiment, the third waveform includes a compensation refresh phase and a third hold phase.
On the basis of the above embodiment, the driving device further includes:
the parameter confirmation unit is used for counting waveform state parameters corresponding to each second screen pixel and each third screen pixel;
and the pixel point resetting unit is used for resetting, refreshing and displaying the pixel point when the waveform state parameter of any pixel point meets the preset screen maintenance condition.
On the basis of the above embodiment, the screen maintenance condition includes at least one of the following conditions:
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated duration of the second screen pixel in the anti-disturbance stage and/or the second holding stage reaches a corresponding preset duration threshold, or the accumulated duration of the third screen pixel in the compensation refreshing stage and/or the third holding stage reaches a corresponding preset duration threshold;
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated times of the second screen pixel entering an anti-disturbance stage and/or a second holding stage reach corresponding preset times thresholds, or the accumulated times of the third screen pixel entering a compensation refreshing stage and/or a third holding stage reach corresponding preset times thresholds;
And the image refreshing times of the electronic ink screen reach a preset refreshing threshold value.
On the basis of the above embodiment, the second waveform includes a plurality of anti-disturbance phases and a plurality of second hold phases that are arranged at intervals, and the third waveform includes a plurality of compensation refresh phases and a plurality of third hold phases that are arranged at intervals.
On the basis of the embodiment, the second screen pixels and the third screen pixels are divided into a plurality of refresh areas according to the distribution information, and the refresh areas sequentially apply the corresponding second waveforms or third waveforms.
On the basis of the embodiment, the refresh parameters corresponding to different refresh regions are different.
The driving device provided by the embodiment of the invention is contained in the display equipment, can be used for executing the corresponding driving method provided by the embodiment, and has corresponding functions and beneficial effects.
It should be noted that, in the embodiment of the driving apparatus, 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 present invention.
Fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 3, the display apparatus includes a processor 310 and a memory 320, and may further include an input device 330, an output device 340, and a communication device 350; the number of processors 310 in the display device may be one or more, one processor 310 being taken as an example in fig. 3; the processor 310, memory 320, input means 330, output means 340 and communication means 350 in the display device may be connected by a bus or other means, in fig. 3 by way of example.
The memory 320 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the driving method of the electronic ink screen in the embodiment of the present invention. The processor 310 executes various functional applications of the electronic device and data processing by running software programs, instructions and modules stored in the memory 320, i.e., implements the driving method of the electronic ink screen described above.
The input device 330 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. The output device 340 may include a display module such as a display screen, specifically an electronic ink screen in this embodiment.
The display device comprises the driving device of the electronic ink screen, can be used for executing any driving method of the electronic ink screen, and has corresponding functions and beneficial effects.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, is used for executing the related operations in the driving method of the electronic ink screen provided in any embodiment of the application, and has corresponding functions and beneficial effects.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product.
Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory. The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (11)
1. A driving method of an electronic ink screen for setting a display device of the electronic ink screen, the driving method comprising:
comparing the image information of the current display picture with the image information of a picture to be displayed to obtain pixel type and distribution information of the picture to be displayed, wherein the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changed screen pixel which is different from the current display picture in the picture to be displayed, the second screen pixel is a screen pixel which forms the outline of the first screen pixel within a preset range from the minimum distance of the second screen pixel, and the third screen pixel is a pixel which is the same as the current display picture in the picture to be displayed and does not reach the expected gray value and is in a compensation stage;
confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode;
applying a first waveform to the pixel point corresponding to the first screen pixel according to the distribution information so as to present an area picture corresponding to the first screen pixel; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel.
2. The driving method of claim 1, wherein the second waveform comprises an anti-disturbance phase and a second hold phase.
3. The driving method according to claim 1 or 2, wherein the third waveform includes a compensation refresh phase and a third hold phase.
4. The driving method according to claim 1 or 2, characterized in that the driving method further comprises:
counting waveform state parameters corresponding to each second screen pixel and each third screen pixel;
and resetting, refreshing and displaying the pixel point when the waveform state parameter of any pixel point is confirmed to meet the preset screen maintenance condition.
5. The driving method according to claim 4, wherein the screen maintenance condition includes at least one of:
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated duration of the second screen pixel in the anti-disturbance stage and/or the second holding stage reaches a corresponding preset duration threshold, or the accumulated duration of the third screen pixel in the compensation refreshing stage and/or the third holding stage reaches a corresponding preset duration threshold;
the pixel type corresponding to the pixel point is continuously a second screen pixel or a third screen pixel, and the accumulated times of the second screen pixel entering an anti-disturbance stage and/or a second holding stage reach corresponding preset times thresholds, or the accumulated times of the third screen pixel entering a compensation refreshing stage and/or a third holding stage reach corresponding preset times thresholds;
And the image refreshing times of the electronic ink screen reach a preset refreshing threshold value.
6. The driving method of claim 3, wherein the second waveform includes a plurality of anti-disturbance phases and a plurality of second sustain phases arranged at intervals, and the third waveform includes a plurality of compensation refresh phases and a plurality of third sustain phases arranged at intervals.
7. The driving method according to claim 1 or 2, wherein the second screen pixel and the third screen pixel are divided into a plurality of refresh regions according to the distribution information, and the refresh regions sequentially apply the corresponding second waveform or third waveform in order.
8. The driving method according to claim 7, wherein refresh parameters corresponding to different refresh regions are different.
9. A driving apparatus for an electronic ink screen, for setting a display device of the electronic ink screen, the driving apparatus comprising:
the image comparison unit is used for comparing the image information of the current display picture with the image information of the picture to be displayed to obtain the pixel type and the distribution information of the picture to be displayed, wherein the picture to be displayed comprises at least one of a first screen pixel, a second screen pixel and a third screen pixel; the first screen pixel is a changed screen pixel which is different from the current display picture in the picture to be displayed, the second screen pixel is a screen pixel which forms the outline of the first screen pixel within a preset range from the minimum distance of the second screen pixel, and the third screen pixel is a pixel which is the same as the current display picture in the picture to be displayed and does not reach the expected gray value and is in a compensation stage;
The waveform generation unit is used for confirming a first waveform corresponding to the first screen pixel, a second waveform corresponding to the second screen pixel and a third waveform corresponding to the third screen pixel according to the current refreshing mode;
the display driving unit is used for correspondingly applying a first waveform to the pixel points corresponding to the first screen pixels according to the distribution information so as to present the area picture corresponding to the first screen pixels; applying a second waveform to the pixel point corresponding to the second screen pixel correspondingly so as to enable the area corresponding to the second screen pixel to keep the original display effect; and applying a third waveform to the pixel point corresponding to the third screen pixel so as to perform display compensation on the area corresponding to the third screen pixel.
10. A display device, characterized by comprising:
an electronic ink screen;
one or more processors;
a memory for storing one or more computer programs;
when executed by the one or more processors, causes the display device to implement the method of driving an electronic ink screen as recited in any one of claims 1-8.
11. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a method of driving an electronic ink screen according to any of claims 1-8.
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| WO2005050607A1 (en) * | 2003-11-21 | 2005-06-02 | Koninklijke Philips Electronics N.V. | Crosstalk compensation in an electrophoretic display device |
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