CN116665602B - Method and device for removing residual shadows of electronic ink screen and electronic equipment - Google Patents
Method and device for removing residual shadows of electronic ink screen and electronic equipment Download PDFInfo
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
Abstract
The disclosure relates to a method and a device for removing a residual shadow of an electronic ink screen and electronic equipment, wherein the method for removing the residual shadow of the electronic ink screen comprises the following steps: detecting whether the electronic ink screen is in a refreshing mode; if the electronic ink screen is in a refreshing mode, counting refreshing frame numbers; and when the refresh frame number reaches a preset refresh frame number threshold value, performing residual image removing operation on pixel points with the current frame and the previous frame being the base colors. According to the electronic ink screen automatic ghost eliminating method and device, automatic ghost eliminating operation can be carried out on the electronic ink screen, a user does not need to manually eliminate the electronic ink screen, the display interface is not obvious in change, the condition that a human eye perceives screen to flicker is prevented, and user experience is improved.
Description
Technical Field
The disclosure relates to the technical field of electronic ink screens, and in particular relates to a method and a device for removing residual shadows of an electronic ink screen and electronic equipment.
Background
The electronic ink screen is also called an electronic paper display technology, and in the today that electronic reading is continuously increasing, the myopia rate of the public is continuously increasing, and reading is carried out through the electronic ink screen, so that eyes of a user can be greatly protected, and the electronic ink screen has the advantages of portability and portability.
The surface of the electronic ink screen is adhered with a plurality of small-volume 'microcapsules', black particles with negative electricity and white particles with positive electricity are encapsulated in the electronic ink screen, and the particles with different colors are orderly arranged by changing the electric charge, so that a visible black-white effect is presented, and when the black-white capsules float to the top layer of the display screen in different proportions, gray images with different gray scales can be displayed.
Based on the unique display technology of the electronic ink screen, when two frames of images with larger gray level difference are displayed, the black-and-white capsules cannot move to the corresponding gray level positions rapidly due to short application time of control voltage or insufficient power, so that the content of the previous frame of images, namely, the residual shadows, are reserved on the screen. Meanwhile, because mutual interference exists among each pixel point of the electronic ink screen, when the display content is updated, an unchanged area is not influenced by the control voltage, and the phenomenon of afterimage can be caused. In the prior art, the residual shadow is cleared by adopting a manual global refreshing mode, so that a user is required to clear the residual shadow manually for a plurality of times, the clearing time is too long, the screen flickering is serious due to obvious change of a display interface, and the user experience is influenced.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the present disclosure provides a method, an apparatus, and an electronic device for removing a ghost image of an electronic ink screen, which can perform an automatic ghost image removing operation on the electronic ink screen, without manual removal by a user, and with unobvious display interface change, so as to prevent the occurrence of the condition that a human eye perceives that the screen flickers, and improve user experience.
In a first aspect, the present disclosure provides a method for removing a ghost image of an electronic ink screen, including:
detecting whether the electronic ink screen is in a refreshing mode;
if the electronic ink screen is in a refreshing mode, counting refreshing frame numbers;
and when the refresh frame number reaches a preset refresh frame number threshold value, performing residual image removing operation on pixel points with the current frame and the previous frame being the base colors.
In some embodiments, the detecting whether the electronic ink screen is in the refresh mode includes:
counting the sum of different pixel points of two adjacent frames of pictures;
judging whether the sum of different pixel points of the two adjacent frames of pictures is larger than a first threshold value;
if yes, determining the electronic ink screen as a refreshing mode.
In some embodiments, the detecting whether the electronic ink screen is in the refresh mode includes:
counting the sum of different pixel points of two adjacent frames of pictures;
judging whether the sum of different pixel points of the two adjacent frames of pictures is larger than a first threshold value;
if not, counting frames from the current frame;
and if the frame count is smaller than a second threshold value, determining that the electronic ink screen is in a refreshing mode.
In some embodiments, if the frame count is greater than or equal to the second threshold, determining that the electronic ink screen is in a still mode and maintaining the current display.
In some embodiments, when the refresh frame number reaches a preset refresh frame number threshold, after performing the residual image removing operation on the pixel points with the base colors of the current frame and the previous frame, the method further includes:
and refreshing and displaying the picture corresponding to the current frame.
In some embodiments, refreshing and displaying the picture corresponding to the current frame includes:
and refreshing pixel points in the previous frame, which are different from the current frame, and displaying a picture corresponding to the current frame.
In some embodiments, before detecting whether the electronic ink screen is in the refresh mode, further comprising:
and judging whether the electronic ink screen is in a text display state, and triggering whether the electronic ink screen is in a refreshing mode or not when the electronic ink screen is in the text display state.
In some embodiments, when the refresh frame number reaches a preset refresh frame number threshold, performing an image sticking elimination operation on pixels whose current frame and previous frame are both base colors, including:
when the refresh frame number reaches a preset refresh frame number threshold value, applying a preset positive voltage to pixel points with white background color of the current frame and the previous frame, and performing residual image removal operation;
or,
and when the refresh frame number reaches a preset refresh frame number threshold value, applying a preset negative voltage to pixel points with black background color of the current frame and the previous frame, and performing residual image removal operation.
In a second aspect, the present disclosure further provides a ghost image removing apparatus for an electronic ink screen, including:
the detection module is used for detecting whether the electronic ink screen is in a refreshing mode or not;
the refreshing frame number counting module is used for counting refreshing frame numbers if the electronic ink screen is in a refreshing mode;
and the residual image removing module is used for carrying out residual image removing operation on pixel points with the current frame and the previous frame as the base colors when the refresh frame number reaches a preset refresh frame number threshold value.
In a third aspect, the present disclosure further provides an electronic device, including a processor and a memory, where the processor executes any one of the methods for removing a ghost image of an electronic ink screen provided in the first aspect by calling a program or an instruction stored in the memory.
Compared with the prior art, the technical scheme provided by the disclosure has the following advantages:
the ghost shadow removing method of the electronic ink screen provided by the disclosure comprises the following steps: and detecting whether the electronic ink screen is in a refreshing mode, if so, counting the refreshing frame number, and when the refreshing frame number reaches a preset refreshing frame number threshold value, performing residual image removing operation on pixel points with the current frame and the previous frame being the base colors. Therefore, whether the current electronic ink screen is in a refreshing mode is checked, and because the electronic ink screen possibly has residual shadows in the refreshing mode, the refreshing frame number is counted in the refreshing mode, and when the refreshing frame number reaches a preset refreshing frame number threshold value, residual shadow removing operation is carried out on pixel points with the base colors of the current frame and the previous frame so as to eliminate the residual shadows, so that the base colors are recovered to be normal. According to the electronic ink screen automatic ghost eliminating method and device, automatic ghost eliminating operation can be carried out on the electronic ink screen, a user does not need to manually eliminate the electronic ink screen, the display interface is not obvious in change, the condition that a human eye perceives screen to flicker is prevented, and user experience is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a flowchart of a method for removing a ghost image of an electronic ink screen according to an embodiment of the disclosure;
fig. 2 is a flowchart illustrating a method for removing a ghost image of an electronic ink screen according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram illustrating a comparison between an electronic ink screen with and without residual image removal according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram illustrating still another embodiment of the present disclosure for removing residual shadows from an electronic ink screen;
fig. 5 is a schematic structural diagram of a ghost image removing device of an electronic ink screen according to an embodiment of the disclosure;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
In the prior art, when the residual shadow of the electronic ink screen is removed, a one-time multi-gray-scale complete refreshing mode is adopted, and when the residual shadow appears on the electronic ink screen, the operation of removing the residual shadow is started manually. In the existing residual shadow removing mode, for each pixel point, a large number of ink drops, namely transparent capsules, move according to a one-time multi-gray-scale complete refreshing mode. Under the action of an electric field, ink drops move from the current state to the state that the upper electrode is black, then move from the position which is black to the position which is white to the lower electrode, and finally move to the position which is required to be represented by the input state, so that a display picture without residual shadows can be displayed. In a complete multi-gray level refresh mode, all ink drops need to be reset once again and then moved to the required positions for the input state. Since the voltage is not applied once in the whole process, and the state of the ink drop which is finally presented can be ensured to be the required output state by applying multiple times of voltages, the refreshing time of the process is long. Therefore, in the traditional one-time multi-gray-scale complete refreshing mode, black particles with negative charges and white particles with positive charges in ink drops need to be moved to the extreme positions of a screen respectively, residual shadows can be completely removed, and as voltage needs to be applied for many times in the process, the black particles with negative charges and the white particles with positive charges can be moved to the upper layer of the screen in batches, so that in the use process of a user, the ink screen can be seen to flash from black to white or from white to black sequentially, black and white alternation of the screen is obvious, and human eyes can sense the condition of screen flash to influence the normal use of the user.
In view of the above drawbacks, the embodiments of the present disclosure provide a method for removing a ghost image of an electronic ink screen, which may be executed by a ghost image removing device of the electronic ink screen, where the ghost image removing device of the electronic ink screen may be implemented in a software and/or hardware manner, and the method for removing a ghost image of the electronic ink screen provided by the embodiments of the present disclosure may be applicable to an electronic device. Fig. 1 is a flowchart of a method for removing a ghost image of an electronic ink screen according to an embodiment of the disclosure. As shown in FIG. 1, the method for removing the ghost shadow of the electronic ink screen comprises S100-S300:
s100, detecting whether the electronic ink screen is in a refreshing mode.
When the electronic ink screen is in a refreshing mode, the display content of the front frame and the rear frame is different, so that the content of the previous frame of image is left on the screen, namely, white particles and black particles do not have enough time and power to move to a proper position in the refreshing process of the electronic ink screen, and the afterimage appears on the screen.
S200, if the electronic ink screen is in the refresh mode, counting the refresh frame number.
And S300, when the refresh frame number reaches a preset refresh frame number threshold value, performing residual image removal operation on pixel points with the current frame and the previous frame being the base colors.
In the embodiment of the disclosure, if the electronic ink screen is detected to be in the refresh mode, the refresh frame number of the electronic ink screen needs to be counted, and in the refresh mode, each time the picture displayed by the electronic ink screen changes, one frame needs to be refreshed, and each refresh involves the movement of charged particles. Comparing the counted refresh frame number with a preset refresh frame number threshold, and when the refresh frame number reaches the preset refresh frame number, it can be understood that in the current situation, the refresh times of the electronic ink screen are enough, and the moving times of the charged particles are also enough. In the moving process of the charged particles, the situation that the charged particles move out of position exists or the situation that the charged particles move out of position is about to occur, so that the ghost shadow is generated or the ghost shadow is likely to occur. In order to solve or avoid the above situation, a ghost clearing operation is required. Because the residual image is located at the pixel with the color as the base color, the embodiment of the disclosure performs the residual image removing operation on the pixel with the color as the base color of the current frame and the previous frame.
In the method for removing the residual shadows of the electronic ink screen provided by the embodiment of the disclosure, whether the current electronic ink screen is in a refreshing mode is checked, if the electronic ink bottle is in the refreshing mode, the refreshing frame number is counted, and when the refreshing frame number reaches a preset refreshing frame number threshold value, a residual shadow removing operation is performed once, so that the background color is recovered to be normal. Therefore, the embodiment of the disclosure can automatically execute the operation of eliminating the ghost shadow without the need of frequent ghost shadow eliminating operation manually performed by a user. In addition, compared with a one-time multi-gray-scale complete refreshing mode in the prior art, the embodiment of the disclosure judges whether the electronic ink screen is in the refreshing mode or not, and performs the operation of eliminating the ghost after the number of refreshing frames is reached in the refreshing mode, so that each pixel point is not reset too frequently, the service life of the electronic screen can be prolonged, and as the operation is only performed on the pixel points with the base colors of the current frame and the previous frame, no voltage is required to be continuously applied for many times, the phenomenon of frequent flicker of black and white alternation of the electronic ink screen can be avoided, and the power can be saved.
In some embodiments, fig. 2 is a flowchart of still another method for removing an image sticking on an electronic ink screen according to an embodiment of the present disclosure, where, as shown in fig. 2, detecting whether the electronic ink screen is in a refresh mode includes:
s110, counting the sum of different pixel points of two adjacent frames of pictures.
S120, judging whether the sum of different pixel points of two adjacent frames of pictures is larger than a first threshold value. If yes, then S130 is performed.
S130, determining the electronic ink screen to be in a refreshing mode.
When detecting whether the electronic ink screen is in a refreshing mode, the method can judge by counting the sum of different pixel points of two adjacent frames of pictures. The more the sum of different pixels of two adjacent frames, the larger the difference between the two frames, the fewer the different pixels, and the smaller the difference between the two frames.
And comparing the sum of different pixel points of the two adjacent frames obtained through statistics with a first threshold value, judging whether the sum of different pixel points of the two adjacent frames is larger than the first threshold value, if so, the number of different pixel points in the two adjacent frames is larger, the difference between the two frames is larger, the change is obvious, and the electronic ink screen can be determined to be in a refreshing mode.
In some embodiments, detecting whether the electronic ink screen is in a refresh mode comprises:
s110, counting the sum of different pixel points of two adjacent frames of pictures.
S120, judging whether the sum of different pixel points of two adjacent frames of pictures is larger than a first threshold value. If not, S140 is performed.
In the embodiment of the present disclosure, the sum of different pixels of two adjacent frames is counted, if the sum of different pixels of two adjacent frames is less than or equal to the first threshold, it can be considered that the number of different pixels in the current two frames is less, the difference between the two frames is less, the change is not obvious, it cannot be directly determined whether the electronic ink screen is in the refresh mode, the current mode needs to be judged again, and step S140 is executed.
S140, counting frames from the current frame.
For example, if the sum of the different pixels of the two adjacent frames is less than or equal to the first threshold in S120, counting from the current frame, and recording as 1, and continuously determining whether the sum of the different pixels of the two adjacent frames is greater than the first threshold, if not, adding 1 to the frame count.
S150, the frame count is smaller than a second threshold. S130 is performed.
S130, determining the electronic ink screen to be in a refreshing mode.
Specifically, comparing the frame count started in S140 with the second threshold, if the frame count is smaller than the second threshold, the number of similar frames displayed by different frames is small, and only a few of the frames are similar, and the frames are not kept for a long time, but are switched to frames with larger differences quickly, in which case, ghost may be caused, so that the electronic ink screen is determined to be in the refresh mode.
In some embodiments, after the current frame starts to be frame counted in S140, further comprising:
s160, the frame count is greater than or equal to a second threshold. S170 is performed.
S170, determining that the electronic ink screen is in a static mode.
S180, maintaining the current display picture.
In the embodiment of the disclosure, frame counting is performed from a current frame, if the sum of different pixel points of two adjacent frames is counted to be not greater than a first threshold value, frame counting is performed, and the frame counting is compared with a second threshold value, if the frame counting is greater than or equal to the second threshold value, the number of similar frames displayed by different frames is indicated to be more, the degree of change of the electronic ink screen frames is lower, the frames are kept similar for a long time, and the possibility of occurrence of ghost is lower, so that the electronic ink screen is determined to be in a static mode. The current display picture can be kept in the static mode, and the influence on the normal use of a user is avoided.
In some embodiments, when the refresh frame number reaches the preset refresh frame number threshold, after performing the residual image removing operation on the pixel points with the base color of the current frame and the previous frame, the method further includes:
s400, refreshing and displaying a picture corresponding to the current frame.
Specifically, after the pixel points with the base colors of the current frame and the previous frame are subjected to the residual image removing operation, the residual image of the electronic ink screen is basically eliminated, the display of the electronic ink screen is restored to be normal, and the visual perception of a user when using the electronic ink screen is normal and is not influenced by the residual image, so that the picture corresponding to the current frame can be refreshed and displayed, and the electronic ink screen can be continuously used normally.
In some embodiments, refreshing the display of the picture corresponding to the current frame includes:
s410, refreshing pixel points in the previous frame, which are different from the current frame, and displaying a picture corresponding to the current frame.
Since the same pixel point in the previous frame picture as the current frame picture applies the same voltage, when refreshing, the pixel points in the previous frame, which are different from the current frame, can be refreshed to display the picture corresponding to the current frame.
In some embodiments, before detecting whether the electronic ink screen is in the refresh mode, further comprising:
and judging whether the electronic ink screen is in a text display state, and triggering and detecting whether the electronic ink screen is in a refreshing mode when the electronic ink screen is in the text display state.
In the embodiment of the disclosure, before detecting whether the electronic ink screen is in the refresh mode, the method and the device can judge whether the electronic ink screen is in a text display state with i, and when the electronic ink screen is in the text display state, the image refresh speed of the electronic ink screen is low, the ghost shadow is cleared in the text display mode, the change of pixel points can not be noticed by human eyes, and the normal use of the electronic ink screen by a user can not be influenced. The electronic ink screen also includes a video display state, and because the video is formed by switching frames per second, the refresh rate is high, if the image sticking elimination operation is performed on the current frame, shake can occur when the frames are rapidly switched, and human eyes are easy to find, so that user experience is affected.
In some embodiments, when the refresh frame number reaches a preset refresh frame number threshold, performing a residual image removing operation on pixels whose current frame and previous frame are both base colors, including:
and S310, when the refresh frame number reaches a preset refresh frame number threshold, applying a preset positive voltage to the pixel points of which the current frame and the previous frame are both white ground colors, and performing residual image removal operation.
For example, if the ground color displayed by the electronic ink screen is white, the font is black, the font is displayed as white ground black character, and when there is a residual shadow, the residual shadow is black. Wherein the white particles are positively charged and the black particles are negatively charged. In an embodiment of the present disclosure, fig. 3 is a schematic diagram illustrating a comparison between the residual image removal of the electronic ink screen and the residual image removal not performed in the embodiment of the present disclosure. As shown in fig. 3, black and white charged particles are located within transparent capsules that are located between conductive electrode pads of an electronic ink screen. In fig. 3 a, the electronic ink screen displays the situation that the ground color is refreshed from white to white under normal conditions, i.e. when no residual shadow exists. As can be seen from a in fig. 3, when the ink screen is white in ground color and the image is updated without content, no voltage needs to be applied to the upper and lower conductive electrode plates, and black and white particles do not move, so that the original state is maintained. In fig. 3 b, when the residual shadow exists, the electronic ink screen is refreshed from white to white, and it can be seen that, because the bottom color is unchanged, if no voltage is applied to the upper and lower conductive electrode plates, black and white particles in the transparent capsule do not move, the original state is maintained, and the display content is still kept as the black residual shadow. For the ghost situation in fig. 3 b, in the embodiment of the present disclosure, when the refresh frame number reaches the preset refresh frame number threshold, a preset positive voltage is applied to the pixel points where the current frame and the previous frame are both white ground colors, so as to perform the ghost clearing operation. Referring to fig. 3 c, in the case that the electronic ink screen is white in ground color and has a ghost image, if the display content of the pixel point is not updated, that is, the white color of the previous frame is changed into the white color of the current frame, a positive voltage is applied to the bottom conductive electrode plate, and the black particles move downwards, so that the ghost image is effectively eliminated.
In some embodiments, when the refresh frame number reaches the preset refresh frame number threshold, performing the residual image removing operation on the pixel points with the base color of the current frame and the previous frame may include:
and S320, when the refresh frame number reaches a preset refresh frame number threshold, applying a preset negative voltage to the pixel points of which the current frame and the previous frame are black ground, and performing residual image removal operation.
For example, if the ground color displayed by the electronic ink screen is black, the font is white, and the electronic ink screen is displayed as a black ground white character. Wherein, when there is a ghost, the ghost is white. Wherein the white particles are positively charged and the black particles are negatively charged. In the embodiment of the disclosure, fig. 4 is a schematic diagram comparing the image sticking elimination of the electronic ink screen with the image sticking elimination not performed in the embodiment of the disclosure, as shown in fig. 4, black-and-white charged particles are located in a transparent capsule, the transparent capsule is located between conductive electrode plates of the electronic ink screen, and in fig. 4, a is a case that the electronic ink screen displays a background color refreshed from black to black under a normal condition, that is, when no image sticking exists. As can be seen from a in fig. 4, when the ink screen is black in ground color and the image is updated without content, no voltage needs to be applied to the upper and lower conductive electrode plates, and black and white particles do not move, so that the original state is maintained. In fig. 4 b, when the residual shadow exists, the electronic ink screen is refreshed from black to black, and it can be seen that, because the bottom color is unchanged, if no voltage is applied to the upper and lower conductive electrode plates, black and white particles in the transparent capsule do not move, the original state is maintained, and the display content still remains as the white residual shadow. For the ghost condition in fig. 4 b, in the embodiment of the disclosure, when the refresh frame number reaches the preset refresh frame number threshold, a preset negative voltage is applied to the pixel points of which the current frame and the previous frame are both black ground colors, so as to perform the ghost clearing operation. Referring to fig. 4 c, in the case where the electronic ink screen is black and has a ghost, if the display content of the pixel point is not updated, that is, the black of the previous frame is changed to the white of the current frame, a negative voltage is applied to the bottom conductive electrode plate, and the white particles move downward, so that the effective ghost disappears.
Fig. 5 is a schematic structural diagram of a ghost image removing apparatus for an electronic ink screen according to an embodiment of the present disclosure, where, as shown in fig. 5, the ghost image removing apparatus includes: a detection module 51, a refresh frame count module 52 and a ghost removal module 53.
The detection module is used for detecting whether the electronic ink screen is in a refreshing mode. And the refresh frame number counting module is used for counting the refresh frame number if the electronic ink screen is in the refresh mode. And the residual image removing module is used for carrying out residual image removing operation on pixel points with the current frame and the previous frame as the base colors when the refresh frame number reaches a preset refresh frame number threshold value.
Optionally, the detection module 51 is specifically configured to count a sum of different pixels of two adjacent frames of pictures; judging whether the sum of different pixel points of two adjacent frames of pictures is larger than a first threshold value; if yes, determining the electronic ink screen as a refreshing mode.
Optionally, the detection module 51 is further specifically configured to count a sum of different pixels of two adjacent frames of pictures; judging whether the sum of different pixel points of two adjacent frames of pictures is larger than a first threshold value; if not, counting frames from the current frame; and if the frame count is smaller than the second threshold value, determining that the electronic ink screen is in a refreshing mode.
Optionally, the display device further comprises a refreshing module, which is used for refreshing and displaying the picture corresponding to the current frame.
Optionally, the refreshing module is further configured to refresh pixels in the previous frame that are different from the current frame, and display a picture corresponding to the current frame.
Optionally, the electronic ink screen display device further comprises a text display state judging module, which is used for judging whether the electronic ink screen is in a text display state or not, and triggering and detecting whether the electronic ink screen is in a refresh mode or not when the electronic ink screen is in the text display state.
Optionally, the ghost clearing module 53 is specifically configured to apply a preset positive voltage to the pixel points where the current frame and the previous frame are both white ground colors when the refresh frame number reaches the preset refresh frame number threshold value, and perform a ghost clearing operation; or when the refresh frame number reaches a preset refresh frame number threshold value, applying a preset negative voltage to the pixel points of which the current frame and the previous frame are black ground color, and performing residual image removal operation.
It should be noted that, the device for removing the residual shadow of the electronic ink screen provided in the embodiment of the present disclosure may implement the steps of any one of the methods for removing the residual shadow of the electronic ink screen in the foregoing embodiments, and has the corresponding beneficial effects, which may be understood with reference to the foregoing description and will not be repeated herein.
The embodiments of the present disclosure further provide a computer readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the method for removing the ghost image of the electronic ink screen provided in any of the embodiments, so that the method has the beneficial effects described in the foregoing embodiments, and the embodiments of the disclosure are not repeated herein.
Examples of readable storage media include, but are not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Electrical Programmable Read Only Memory, EPROM), an optical fiber, a portable compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The storage medium provided by the above embodiment of the present disclosure and the method for removing the ghost image of the electronic ink screen provided by the embodiment of the present disclosure have the same beneficial effects as the method adopted, operated or implemented by the application program or the instruction stored therein, because of the same inventive concept.
An embodiment of the present disclosure further provides an electronic device, and fig. 6 is a schematic structural diagram of an electronic device provided in the embodiment of the present disclosure, where, as shown in fig. 6, the electronic device includes a processor 61 and a memory 62, and the processor 61 executes the method for removing the ghost image of the electronic ink screen according to any embodiment of the present disclosure by calling a program or an instruction stored in the memory 62.
It will be appreciated that the memory in this embodiment may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. In some embodiments, the memory stores the following elements: executable units or data structures, or a subset thereof, or an extended set of operating systems and applications. In the embodiment of the disclosure, the processor executes the steps of each embodiment of the method for removing the ghost image of the electronic ink screen provided in the embodiment of the disclosure by calling the program or the instruction stored in the memory.
The method for removing the ghost shadow of the electronic ink screen provided by the embodiment of the disclosure can be applied to a processor or realized by the processor. The processor may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The steps of the method for removing the ghost image of the electronic ink screen provided in the embodiment of the disclosure may be directly embodied as execution completion of the hardware decoding processor, or may be completed by combined execution of hardware and software units in the decoding processor. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory and the processor reads information in the memory and performs the steps of the method in combination with its hardware.
The electronic device may further include one physical component, or a plurality of physical components, so as to generate the instruction according to the processor when executing the method for removing the ghost image of the electronic ink screen provided in the embodiment of the present application. The different physical components may be located within the electronic device or external to the electronic device, such as a cloud server or the like. Each entity part cooperates with the processor and the memory to realize the functions of the electronic device in the embodiment.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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 the element.
The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The method for removing the ghost shadow of the electronic ink screen is characterized by comprising the following steps:
detecting whether the electronic ink screen is in a refreshing mode;
if the electronic ink screen is in a refreshing mode, counting refreshing frame numbers;
when the refresh frame number reaches a preset refresh frame number threshold value, performing residual image removing operation on pixel points with the current frame and the previous frame being the base colors; wherein, the detecting whether the electronic ink screen is in the refresh mode includes:
counting the sum of different pixel points of two adjacent frames of pictures;
judging whether the sum of different pixel points of the two adjacent frames of pictures is larger than a first threshold value;
if yes, determining the electronic ink screen as a refreshing mode;
if not, counting frames from the current frame; and if the frame count is smaller than a second threshold value, determining that the electronic ink screen is in a refreshing mode.
2. The method for removing residual shadows from an electronic ink screen according to claim 1, wherein if the frame count is greater than or equal to the second threshold, determining that the electronic ink screen is in a still mode and maintaining a current display screen.
3. The method for removing residual shadows from an electronic ink screen according to claim 1, wherein when the refresh frame number reaches a preset refresh frame number threshold, performing residual shadow removing operation on pixels whose base color is both a current frame and a previous frame, further comprises:
and refreshing and displaying the picture corresponding to the current frame.
4. The method for removing residual shadows from an electronic ink screen according to claim 3, wherein refreshing and displaying a picture corresponding to a current frame comprises:
and refreshing pixel points in the previous frame, which are different from the current frame, and displaying a picture corresponding to the current frame.
5. The method for removing residual shadows from an electronic ink screen according to any one of claims 1-4, further comprising, prior to detecting whether the electronic ink screen is in a refresh mode:
and judging whether the electronic ink screen is in a text display state, and triggering whether the electronic ink screen is in a refreshing mode or not when the electronic ink screen is in the text display state.
6. The method for removing residual shadows from an electronic ink screen according to any one of claims 1 to 4, wherein when the refresh frame number reaches a preset refresh frame number threshold, performing residual shadow removing operation on pixels whose current frame and previous frame are both ground colors, includes:
when the refresh frame number reaches a preset refresh frame number threshold value, applying a preset positive voltage to pixel points with white background color of the current frame and the previous frame, and performing residual image removal operation;
or,
and when the refresh frame number reaches a preset refresh frame number threshold value, applying a preset negative voltage to pixel points with black background color of the current frame and the previous frame, and performing residual image removal operation.
7. The utility model provides a incomplete shadow clearing device of electronic ink screen which characterized in that includes:
the detection module is used for detecting whether the electronic ink screen is in a refreshing mode or not; the method is also specifically used for counting the sum of different pixel points of two adjacent frames of pictures; judging whether the sum of different pixel points of the two adjacent frames of pictures is larger than a first threshold value; if yes, determining the electronic ink screen as a refreshing mode; if not, counting frames from the current frame; if the frame count is smaller than a second threshold value, determining that the electronic ink screen is in a refreshing mode;
the refreshing frame number counting module is used for counting refreshing frame numbers if the electronic ink screen is in a refreshing mode;
and the residual image removing module is used for carrying out residual image removing operation on pixel points with the current frame and the previous frame as the base colors when the refresh frame number reaches a preset refresh frame number threshold value.
8. An electronic device, comprising a processor and a memory, wherein the processor executes the method for removing the ghost image of the electronic ink screen according to any one of claims 1 to 6 by calling a program or instructions stored in the memory.
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