Electronic ink screen and its control method, device, and computer-readable storage medium

Abstract

This application discloses an electronic ink screen and its control method, apparatus, and computer-readable storage medium. The control method of the electronic ink screen 10 includes that within a preset period, the difference between the number of positive-pressure refresh processes and the number of negative-pressure refresh processes corresponding to the target capsules 111 is less than or equal to a preset difference threshold. The positive-pressure refresh process includes increasing the amplitude of the control voltage signal to a preset maximum positive-pressure value and then decreasing the amplitude of the control voltage signal, whereby the target capsules 111 display colors based on the control voltage signal and complete the refresh of one frame. The negative-pressure refresh process includes decreasing the amplitude of the control voltage signal to a preset maximum negative-pressure value and then increasing the amplitude of the control voltage signal, whereby the target capsules display colors based on the control voltage signal and complete the refresh of one frame. Based on the above method, the afterimage phenomenon of the electronic ink screen 10 can be effectively reduced, and the display effect of the electronic ink screen 10 can be improved.

Description

Technical Field

[0001] <Cross - reference to Related Applications> This application claims priority from a Chinese patent application entitled "Electronic Ink Screen and Its Control Method, Device, and Computer - Readable Storage Medium", filed on August 29, 2022, with application number 2022110412695, and the entire content of this Chinese patent application is incorporated herein by reference.

[0002] This application relates to the field of display technologies, and in particular, to electronic ink screens and their control methods, devices, and computer - readable storage media.

Background Art

[0003] With the development of the times, people's needs for reading are increasing. To improve the convenience of reading and protect the eyesight of readers, electronic ink screens that can store a large amount of book data and are less likely to damage the readers' eyesight have emerged. Each electronic ink capsule in the electronic ink screen generally stores a positively charged first - colored particle (e.g., white particle) and a negatively charged second - colored particle (e.g., black particle). By applying different voltages (e.g., positive voltage or negative voltage) to the electronic ink capsule, the control of the color displayed on the electronic ink capsule is realized.

[0004] The drawback of the prior art is that when the electronic ink capsule displays the same color or similar colors for a long time, a positive voltage or a negative voltage is likely to be applied to the electronic ink capsule for a long time. In this case, the electronic ink capsule is easily damaged irreversibly. Moreover, the afterimage phenomenon in the electronic ink screen is serious, and the display effect of the electronic ink screen is poor.

Summary of the Invention

[0005] The main technical problem to be solved by this application is how to reduce the afterimage phenomenon of the electronic ink screen and improve the display effect of the electronic ink screen.

[0006] To solve the above technical problem, the first technical solution adopted by the present application is as follows. A method for controlling an electronic ink screen, the electronic ink screen includes a plurality of electronic ink capsules, the electronic ink capsules include positively charged first color particles and negatively charged second color particles, the amplitude range of the control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative voltage value to a preset maximum positive voltage value, one of the plurality of electronic ink capsules is used as a target capsule, and the method for controlling the electronic ink screen includes that within a preset period, the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is less than or equal to a preset difference threshold value. Here, the positive pressure refresh process includes increasing the amplitude of the control voltage signal to the preset maximum positive voltage value, and then decreasing the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal and completes the refresh of one frame. The negative pressure refresh process includes decreasing the amplitude of the control voltage signal to the preset maximum negative voltage value, and then increasing the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal and completes the refresh of one frame.

[0007] Here, the fact that within a preset period, the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is less than or equal to a preset difference threshold value includes making the number of positive pressure refresh processes corresponding to the target capsule equal to the number of negative pressure refresh processes within a preset period.

[0008] Here, the preset period corresponds to two frames. One of the two frames is defined as the first frame, and the other is defined as the second frame. Within the preset period, when the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is less than or equal to a preset difference threshold, it means that in the period corresponding to the first frame, the amplitude of the control voltage signal is increased to a preset maximum positive voltage value, and then the amplitude of the control voltage signal is decreased, so that the target capsule displays a color based on the control voltage signal, completing the refresh of the first frame. In the period corresponding to the second frame, the amplitude of the control voltage signal is decreased to a preset maximum negative voltage value, and then the amplitude of the control voltage signal is increased, so that the target capsule displays a color based on the control voltage signal, completing the refresh of one frame. Or in the period corresponding to the first frame, the amplitude of the control voltage signal is decreased to a preset maximum negative voltage value, and then the amplitude of the control voltage signal is increased, so that the target capsule displays a color based on the control voltage signal, completing the refresh of the first frame. In the period corresponding to the second frame, the amplitude of the control voltage signal is increased to a preset maximum positive voltage value, and then the amplitude of the control voltage signal is increased, so that the target capsule displays a color based on the control voltage signal, completing the refresh of one frame.

[0009] Here, the preset period includes a first period and a second period. The difference between the duration of the first period and the duration of the second period is less than or equal to a preset time difference threshold. Within the preset period, when the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is less than or equal to a preset difference threshold, it means that in the first period, the target capsule is controlled to display a color for each frame based on the positive pressure refresh process, and in the second period, the target capsule is controlled to display a color for each frame based on the negative pressure refresh process.

[0010] Here, the number of frames in the first period and the number of frames in the second period are equal, and the number of frames in the first period or the number of frames in the second period is greater than 1.

[0011] Here, the duration of the period corresponding to each frame within the preset period is the same.

[0012] Here, the preset period includes the first period and the second period. The number of frames in the period corresponding to the first period is equal to the number of frames in the period corresponding to the second period. The period corresponding to the first period is within the period corresponding to the second period. Within the preset period, that the difference between the number of times of the positive pressure refresh process and the number of times of the negative pressure refresh process corresponding to the target capsule is less than or equal to the preset difference threshold means that based on the number of times of executing the negative pressure refresh process in the first period, the number of times of executing the positive pressure refresh process that needs to be executed in the second period is determined and recorded as the positive pressure number of times, and based on the number of times of executing the positive pressure refresh process in the first period, the number of times of executing the negative pressure refresh process that needs to be executed in the second period is determined and recorded as the negative pressure number of times. In the second period, it includes executing the positive pressure refresh process with the positive pressure number of times and the negative pressure refresh process with the negative pressure number of times.

[0013] Here, that the difference between the number of times of the positive pressure refresh process and the number of times of the negative pressure refresh process corresponding to the target capsule is less than or equal to the preset difference threshold within the preset period means that in the first period, when the target capsule displays a color based on the control voltage signal and completes the refresh of one frame, among the preset maximum negative pressure value and the preset maximum positive pressure value, the value closest to the current amplitude of the control voltage signal is determined. If the closest value is the preset maximum negative pressure value, the negative pressure refresh process is executed. If the closest value is the preset maximum positive pressure value, the positive pressure refresh process is executed, including completing the refresh of the next frame.

[0014] Here, in the second period, executing the positive pressure refresh process for the number of positive pressure times and the negative pressure refresh process for the number of negative pressure times means that in the second period, when the target capsule completes the refresh of one frame by displaying color based on the control voltage signal, among the preset maximum negative pressure value and the preset maximum positive pressure value, the value closest to the current amplitude of the control voltage signal is determined. If the closest value is the preset maximum negative pressure value, the negative pressure refresh process is executed; if the closest value is the preset maximum positive pressure value, the positive pressure refresh process is executed. Until the number of times of executing the positive pressure refresh process in the second period reaches the number of positive pressure times or the number of times of executing the negative pressure refresh process in the second period reaches the number of negative pressure times, the refresh of the next frame is executed, which includes this.

[0015] Here, in the second period, executing the positive pressure refresh process for the number of positive pressure times and the negative pressure refresh process for the number of negative pressure times means that in the second period, when the number of times of executing the positive pressure refresh process in the second period reaches the number of positive pressure times, the target capsule is controlled to complete the refresh of each frame not refreshed in the second period based on the negative pressure refresh process; when the number of times of executing the negative pressure refresh process in the second period reaches the number of negative pressure times, the target capsule is controlled to complete the refresh of each frame not refreshed in the second period based on the positive pressure refresh process, which includes this.

[0016] Here, the first color particles are white particles and the second color particles are black particles, or the first color particles are black particles and the second color particles are white particles.

[0017] Here, the ratio of the preset difference threshold value to the number of times of the positive pressure refresh process within the preset period is recorded as the first ratio, and / or the ratio of the preset difference threshold value to the number of times of the negative pressure refresh process is recorded as the first ratio. The first ratio is less than or equal to the preset ratio threshold value, and / or the second ratio is less than or equal to the preset ratio threshold value.

[0018] Here, the duration of the preset period is less than or equal to the duration corresponding to a preset number of frames.

[0019] Here, the preset number is negatively correlated with the usage time of the target capsule.

[0020] Here, the usage time of the capsule with the longest usage time among the plurality of electronic ink capsules is recorded as the target usage time, and the preset number is negatively correlated with the target usage time.

[0021] To solve the above technical problem, the second technical solution adopted by this application is as follows. A control device for an electronic ink screen, wherein the electronic ink screen includes a plurality of electronic ink capsules, the electronic ink capsules include positively charged first color particles and negatively charged second color particles, the amplitude range of the control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative voltage value to a preset maximum positive voltage value, one of the plurality of electronic ink capsules is used as the target capsule, the control device includes a control unit, and the control unit is used to ensure that the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule within a preset period is less than or equal to a preset difference threshold. Here, the positive pressure refresh process includes increasing the amplitude of the control voltage signal to the preset maximum positive voltage value, and then decreasing the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal to complete the refresh of one frame. The negative pressure refresh process includes decreasing the amplitude of the control voltage signal to the preset maximum negative voltage value, and then increasing the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal to complete the refresh of one frame.

[0022] Here, the control unit is used to make the number of positive pressure refresh processes corresponding to the target capsule equal to the number of negative pressure refresh processes within a preset period.

[0023] Here, the preset period corresponds to the period of two frames. One of the two frames is defined as the first frame, and the other is defined as the second frame. During the period corresponding to the first frame, the control unit increases the amplitude of the control voltage signal to a preset maximum positive voltage value, and then reduces the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal, completing the refresh of the first frame. During the period corresponding to the second frame, the control unit reduces the amplitude of the control voltage signal to a preset maximum negative voltage value, and then increases the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal, which is used to complete the refresh of one frame. Or during the period corresponding to the first frame, the control unit reduces the amplitude of the control voltage signal to a preset maximum negative voltage value, and then increases the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal, completing the refresh of the first frame. During the period corresponding to the second frame, the control unit increases the amplitude of the control voltage signal to a preset maximum positive voltage value, and then increases the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal, which is used to complete the refresh of one frame.

[0024] Here, the preset period includes a first period and a second period, and the difference between the duration of the first period and the duration of the second period is equal to or less than a preset time difference threshold. The control unit is used to control the target capsule to display a color for each frame based on a positive voltage refresh process during the first period and to control the target capsule to display a color for each frame based on a negative voltage refresh process during the second period.

[0025] To solve the above technical problem, the third technical solution adopted by the present application is as follows. An electronic ink screen, the electronic ink screen includes a memory, a processor, and a plurality of electronic ink capsules, the electronic ink capsules include positively charged first color particles and negatively charged second color particles, and the amplitude range of the control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative voltage value to a preset maximum positive voltage value. One of the plurality of electronic ink capsules is used as a target capsule, the memory is used to store program instructions, and the processor is used to execute the program instructions to implement the above method.

[0026] The beneficial effects of the present application are as follows. Different from the prior art, in the technical solution of the present application, by making the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule within a preset period not exceed a preset difference threshold, the number of positive pressure refresh processes corresponding to the target capsule within the preset period can approach the number of negative pressure refresh processes. As a result, the number of times the amplitude of the control voltage signal received by the target capsule within the preset period reaches the maximum positive voltage value is close to the number of times the amplitude of the control voltage signal received by the target capsule reaches the maximum negative voltage value, avoiding the situation where the target capsule receives a positive pressure signal or a negative pressure signal for a long time, reducing the possibility of damage to the electronic ink capsules in the electronic ink screen, thereby reducing the afterimage phenomenon of the electronic ink screen and improving the display effect of the electronic ink screen.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying out the Invention

[0028] The present application will be further described in more detail below in conjunction with the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only used to explain the present application and do not limit the scope of the present application. Similarly, the following embodiments are only a part of the embodiments of the present application, not all of them. All other embodiments that those skilled in the art can obtain without inventive labor based on the embodiments of the present application belong to the protection scope of the present application.

[0029] As used herein, the term "embodiment" means that a specific feature, structure, or characteristic described with reference to an embodiment may be included in at least one embodiment of the present application. The repeated occurrence of this associated term in each part of the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. As will be explicitly and implicitly understood by those skilled in the art, the embodiments described in this specification can be combined with other embodiments.

[0030] In the description of the present application, it should be noted that unless specifically specified and limited otherwise, the terms "attach", "install", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection, a mechanical connection or an electrical connection, a direct connection or an intermittent connection via an intermediate medium, etc. Those skilled in the art should understand the specific meaning of the above terms according to specific situations.

[0031] This application first provides a method for controlling an electronic ink screen, and the control method is applied to the electronic ink screen.

[0032] The electronic ink screen can include a plurality of electronic ink capsules. The plurality of electronic ink capsules may be arranged in an array on the substrate of the electronic ink screen, or may be arranged in other ways, and specifically can be determined according to actual needs, and is not limited here. Specifically, referring to FIG. 6, FIG. 6 is a schematic structural diagram of an embodiment of the electronic ink screen of this application. In one example, the electronic ink screen 10 includes a plurality of electronic ink capsules 11, and the plurality of electronic ink capsules 11 include a target capsule 11.

[0033] One electronic ink capsule includes positively charged first color particles and negatively charged second color particles. For example, in a black-and-white electronic ink screen, one electronic ink capsule may include positively charged white particles and negatively charged black particles, or may include positively charged black particles and negatively charged white particles. According to the color displayed on the electronic ink screen, the color of the first color particles and the color of the second color particles may be other combinations of colors, and can be determined according to actual needs, and is not limited here.

[0034] By transmitting a control voltage signal corresponding to the electronic ink capsule, an electric field corresponding to the electronic ink capsule can be applied, whereby the electronic ink capsule displays the corresponding color and completes the color display. The amplitude range of the control voltage signal is from a preset maximum negative voltage value to a preset maximum positive voltage value. When the amplitudes of the control voltage signals corresponding to the electronic ink capsules are at different voltage values, based on the action of the corresponding electric field on the electronic ink capsules, the electronic ink capsules display different colors based on different quantities of combined first color particles and second color particles.

[0035] One of the plurality of electronic ink capsules can be used as a target capsule, and the control method includes the following steps.

[0036] Step (S11): Within a preset period, the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is less than or equal to a preset difference threshold value.

[0037] Here, the positive pressure refresh process includes increasing the amplitude of the control voltage signal to a preset maximum positive pressure value, and then decreasing the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal and completes the refresh of one frame.

[0038] The negative pressure refresh process includes decreasing the amplitude of the control voltage signal to a preset maximum negative pressure value, and then increasing the amplitude of the control voltage signal, whereby the target capsule represents a color based on the control voltage signal and completes the refresh of one frame.

[0039] Specifically, one positive pressure refresh process includes the following specific steps.

[0040] After the target capsule completes the color display corresponding to one frame, control is performed to increase the amplitude of the control voltage signal received by the target capsule to a preset maximum positive pressure value, and then decrease the amplitude of the control voltage signal that has reached the preset maximum positive pressure value until it reaches the target voltage value corresponding to the target color, whereby the target capsule can control the voltage signal based on the target voltage value, display the target color, and complete the refresh of one frame corresponding to the target capsule. Here, the target color is the color that the target capsule needs to display in the current frame.

[0041] Accordingly, one negative pressure refresh process includes the following specific steps.

[0042] After the target capsule completes the color display corresponding to one frame, it is controlled such that the amplitude of the control voltage signal received by the target capsule decreases to a preset maximum negative pressure value. Then, the amplitude of the control voltage signal that has reached the preset maximum negative pressure value is increased until it reaches the target voltage value corresponding to the target color. Thereby, the target capsule can control the voltage signal based on the target voltage value, display the target color, and complete the refresh of one frame corresponding to the target capsule.

[0043] For example, referring to FIG. 1, FIG. 1 is a waveform schematic diagram of an embodiment of the control voltage signal of the present application. As shown in FIG. 1, assuming that the preset period is two frame periods, in the first frame period of the two frame periods, after the target capsule completes one frame refresh, one frame refresh is completed by executing a negative pressure refresh process, and then another frame refresh is completed by executing a positive pressure refresh process. Thereby, within the two frame periods, it can be ensured that the number of times the target capsule receives a control voltage signal having an amplitude of the preset maximum negative pressure value is equal to the number of times it receives a control voltage signal having an amplitude of the preset maximum positive pressure value.

[0044] Different from the prior art, in the technical solution of the present application, by making the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule within a preset period be less than or equal to a preset difference threshold, the number of positive pressure refresh processes corresponding to the target capsule within the preset period can approach the number of negative pressure refresh processes. Thereby, the number of times the amplitude of the control voltage signal received by the target capsule within the preset period reaches the maximum positive pressure value is close to the number of times the amplitude of the control voltage signal received by the target capsule reaches the maximum negative pressure value, avoiding the situation where the target capsule within the preset period receives a positive pressure signal or a negative pressure signal for a long time, reducing the possibility of damage to the electronic ink capsules in the electronic ink screen, thereby reducing the afterimage phenomenon of the electronic ink screen and improving the display effect of the electronic ink screen.

[0045] Also, compared with the method of directly adjusting the amplitude of the control voltage signal from the target voltage value corresponding to one frame to the target voltage value corresponding to another frame, the method of adjusting the amplitude of the control voltage signal to the preset maximum positive voltage value / preset maximum negative voltage value, and then directly adjusting the amplitude of the control voltage signal to the corresponding target voltage value based on the preset maximum positive voltage value / preset maximum negative voltage value can make the target voltage value reached after the control voltage signal is adjusted more accurate, that is, the color displayed by the target capsule can be made more accurate, thereby further reducing the afterimage phenomenon of the electronic ink screen and further improving the display effect of the electronic ink screen.

[0046] Specifically, step (S11) can specifically include the following.

[0047] Within a preset period, make the number of times of the positive pressure refresh process corresponding to the target capsule equal to the number of times of the negative pressure refresh process.

[0048] Based on the above method, the number of times the target capsule executes the color display operation of one frame corresponding to the positive pressure refresh process is equal to the number of times the target capsule executes the color display operation of one frame corresponding to the negative pressure refresh process, that is, within the preset period, the number of times the amplitude of the control voltage signal received by the target capsule reaches the maximum positive voltage value is exactly the same as the number of times the amplitude of the control voltage signal received by the target capsule reaches the maximum negative voltage value, thereby the target capsule is controlled to the same extent by positive and negative pressures, the possibility of damage to the target capsule is minimized, and the reliability of the electronic ink screen is improved.

[0049] In one embodiment, the preset period is the period corresponding to two adjacent frames, one of the two frames is taken as the first frame, and the other frame is taken as the second frame.

[0050] Step (S11) can specifically include the following.

[0051] During the period corresponding to the first frame, increase the amplitude of the control voltage signal to a preset maximum positive pressure value, and then decrease the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, complete the refresh of the first frame, and during the period corresponding to the second frame, decrease the amplitude of the control voltage signal to a preset maximum negative pressure value, and then increase the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, and complete the refresh of one frame.

[0052] Alternatively, during the period corresponding to the first frame, decrease the amplitude of the control voltage signal to a preset maximum negative pressure value, and then increase the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, complete the refresh of the first frame, and during the period corresponding to the second frame, increase the amplitude of the control voltage signal to a preset maximum positive pressure value, and then increase the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, and complete the refresh of one frame.

[0053] Specifically, when the preset period only includes the period corresponding to the first frame and the period corresponding to the second frame, a positive pressure refresh process can be executed once in any of the two periods to complete the refresh of the corresponding one frame, and a negative pressure refresh process can be executed once in the other period to complete the refresh of the corresponding other frame. Here, the period for completing the positive pressure refresh process may be the period corresponding to the first frame or the period corresponding to the second frame, and is not limited here.

[0054] Based on the above method, in the period when the target capsule corresponds to any two adjacent frames, one positive pressure refresh process and one negative pressure refresh process can be executed respectively. That is, in the period when the target capsule corresponds to any two adjacent frames, one positive pressure control voltage signal and one negative pressure control voltage signal can be received respectively, thereby reducing the possibility that the electronic ink capsules in the electronic ink screen are damaged and improving the display effect of the electronic ink screen.

[0055] In one embodiment, the preset period includes a first period and a second period, and the difference between the duration of the first period and the duration of the second period is less than or equal to a preset time difference threshold.

[0056] Step (S11) can specifically include the following.

[0057] In the first period, based on the positive pressure refresh process, control the target capsule to display colors frame by frame. In the second period, based on the negative pressure refresh process, control the target capsule to display colors frame by frame.

[0058] Specifically, in the period corresponding to each frame in the first period, based on the positive pressure refresh process, first increase the amplitude of the control voltage signal received by the target capsule to a preset maximum positive pressure value and then decrease it to the target voltage value, thereby performing the corresponding color display. And in the period corresponding to each frame in the second period, based on the negative pressure refresh process, first decrease the amplitude of the control voltage signal received by the target capsule to a preset maximum negative pressure value and then increase it to the target voltage value, thereby performing the corresponding color display.

[0059] Since the durations of the periods corresponding to each frame in a preset period are all the same or close, the difference between the duration corresponding to the first period and the duration corresponding to the second period is equal to or less than a preset time difference threshold. As a result, the number of times the target capsule receives a control voltage signal of a positive voltage in the first period is close to or equal to the number of times the target capsule receives a control voltage signal of a negative voltage. Thereby, the possibility that the electronic ink capsules of the electronic ink screen are damaged is reduced, and the display effect of the electronic ink screen is improved.

[0060] Optionally, the number of frames in the first period is equal to the number of frames in the second period, and the number of frames in the first period or the number of frames in the second period is greater than 1.

[0061] Based on the above method, in the first period, the number of times the target capsule receives a control voltage signal of a positive voltage can be made equal to the number of times the target capsule receives a control voltage signal of a negative voltage. Thereby, the possibility that the electronic ink capsules in the electronic ink screen are damaged is minimized, and the display effect of the electronic ink screen is improved.

[0062] In one embodiment, the preset period includes a first period and a second period. The number of frames in the period corresponding to the first period is equal to the number of frames in the period corresponding to the second period, and the period corresponding to the first period is within the period corresponding to the second period.

[0063] Step (S11) can specifically include the following.

[0064] Based on the number of times the negative pressure refresh process is executed in the first period, the number of times the positive pressure refresh process needs to be executed in the second period is determined and recorded as the positive pressure count. And based on the number of times the positive pressure refresh process is executed in the first period, the number of times the negative pressure refresh process needs to be executed in the second period is determined and recorded as the negative pressure count.

[0065] In the second period, a positive pressure refresh process for the number of positive pressure cycles and a negative pressure refresh process for the number of negative pressure cycles are executed.

[0066] Specifically, in the second period, based on the number of times each target capsule in the first period receives a positive pressure control voltage signal and a negative pressure control voltage signal to complete the color display of one frame, in the second period, in order to reduce the possibility of damage to the electronic ink capsules in the electronic ink screen, it is necessary to determine the number of times each target capsule needs to receive a positive pressure control voltage signal and a negative pressure control voltage signal. Since the number of times the target capsule receives a positive pressure control voltage signal and a negative pressure control voltage signal within a preset period is equal in this way, the afterimage phenomenon in the electronic ink screen can be reduced, and the display effect of the electronic ink screen can be improved.

[0067] Optionally, step (S11) can specifically further include the following.

[0068] In the first period, when the target capsule displays a color based on the control voltage signal and completes the refresh of one frame, determine the value closest to the current amplitude of the control voltage signal among the preset maximum negative pressure value and the preset maximum positive pressure value. If the closest value is the preset maximum negative pressure value, execute the negative pressure refresh process. If the closest value is the preset maximum positive pressure value, execute the positive pressure refresh process, and complete the refresh of the next frame.

[0069] Specifically, in the first period, after the target capsule completes the refresh of one frame, according to the amplitude of the control voltage signal of the target capsule when the frame refresh is completed, determine the difference between the current amplitude and the preset maximum positive pressure value and the difference between the current amplitude and the preset maximum negative pressure value, and further determine the minimum difference. Determine one of the preset maximum positive pressure value and the preset maximum negative pressure value corresponding to the minimum difference as the value closest to the amplitude of the control voltage signal.

[0070] When it is determined that the closest value is the preset maximum positive pressure value, adjusting the amplitude of the current control voltage signal to the preset maximum positive pressure value can be considered faster than adjusting the amplitude of the current control voltage signal to the preset maximum negative pressure value. Therefore, in order to maximize the speed of the signal amplitude, a positive pressure refresh process can be executed to complete the refresh of the next frame. Similarly, when it is determined that the closest value is the preset maximum negative pressure value, adjusting the amplitude of the current control voltage signal to the preset maximum negative pressure value can be considered faster than adjusting the amplitude of the current control voltage signal to the preset maximum positive pressure value. Therefore, in order to maximize the speed of the signal amplitude, a negative pressure refresh process can be executed to complete the refresh of the next frame.

[0071] Based on the above method, the refresh speed of the target capsule in the first period can be maximized, and in the second period, still based on the number of times the positive pressure refresh process and the negative pressure process are executed in the first period, the number of times the corresponding positive pressure refresh process needs to be executed and the number of times the negative pressure process needs to be executed can be determined, ensuring the balance between the number of times the positive pressure refresh process and the number of times the negative pressure refresh process corresponding to the target capsule, further reducing the afterimage phenomenon in the electronic ink screen, and improving the display effect of the electronic ink screen.

[0072] Furthermore, in the second period, executing the positive pressure refresh process for the number of positive pressure times and the negative pressure refresh process for the number of negative pressure times can specifically include the following.

[0073] During the second period, the target capsule performs color display based on the control voltage signal. When refreshing one frame is completed, the value closest to the current amplitude of the control voltage signal at the preset maximum negative pressure value and the preset maximum positive pressure value is determined. If the closest value is the preset maximum negative pressure value, a negative pressure refresh process is executed. If the closest value is the preset maximum positive pressure value, a positive pressure refresh process is executed. The refresh of the next frame is executed until the number of times the positive pressure refresh process is executed in the second period reaches the positive pressure count or the number of times the negative pressure refresh process is executed in the second period reaches the negative pressure count.

[0074] During the second period, when the number of times the positive pressure refresh process is executed in the second period reaches the positive pressure count, the target capsule is controlled to complete the refresh of each frame not refreshed in the second period based on the negative pressure refresh process. When the number of times the negative pressure refresh process is executed in the second period reaches the negative pressure count, the target capsule is controlled to complete the refresh of each frame not refreshed in the second period based on the positive pressure refresh process.

[0075] Based on the above method, the refresh speed of some frames in the second period can be further optimized, while ensuring the balance between the number of times of the positive pressure refresh process and the number of times of the negative pressure refresh process corresponding to the target capsule, further reducing the afterimage phenomenon in the electronic ink screen, and improving the display effect of the electronic ink screen.

[0076] In one embodiment, the ratio of the preset difference threshold value to the number of times of the positive pressure refresh process within the preset period is recorded as the first ratio, and / or the ratio of the preset difference threshold value to the number of times of the negative pressure refresh process within the preset period is recorded as the second ratio.

[0077] The first ratio is less than or equal to the preset ratio threshold, and / or the second ratio is less than or equal to the preset ratio threshold.

[0078] Specifically, for example, assuming that the preset ratio threshold is 0.1, when the number of positive pressure refresh processes within the preset period is 10, the fact that the first ratio is 0.1 or less specifically means that the preset difference threshold is 1 or less. Similarly, when the number of negative pressure refresh processes within the preset period is 20, the fact that the second ratio is 0.1 or less specifically means that the preset difference threshold is 2 or less. Note that the above numerical values are just examples, and other numerical values may be used, but it is not limited thereto.

[0079] Based on the above method, the preset difference threshold can be adaptively adjusted according to the number of positive pressure refresh processes and / or the number of negative pressure refresh processes within the preset period, so that the preset difference threshold is too large or too small for the number of positive pressure refresh processes and / or the number of negative pressure refresh processes within the preset period, thereby avoiding a too large difference in the number of times the electronic ink capsules receive positive pressure and negative pressure within the preset period, further improving the reliability of the above control method, and improving the display effect of the electronic ink screen.

[0080] In one embodiment, the duration of the preset period is not longer than the duration corresponding to the preset number of frames.

[0081] Specifically, based on the above method, it is possible to avoid damage caused by the duration of the preset period being too long and the target capsules receiving continuous positive pressure or negative pressure over a long period of time.

[0082] Optionally, the preset number is negatively correlated with the usage time of the target capsules.

[0083] Specifically, the longer the usage time of the target capsule, the higher the possibility that the target capsule will be damaged by receiving continuous positive or negative pressure. Therefore, the preset quantity and the usage time of the target capsule have a negative correlation. Furthermore, it reduces the possibility of damage to the target capsule and improves the display effect of the electronic ink screen.

[0084] Optionally, the usage time of the capsule with the longest usage time among the plurality of electronic ink capsules is recorded as the target usage time. Here, the preset quantity has a negative correlation with the target usage time.

[0085] Specifically, the above-mentioned preset quantity corresponding to all the electronic ink capsules is determined based on the maximum usage time among the usage times of the plurality of electronic ink capsules, that is, based on the target usage time, thereby reducing the possibility of damage to the target capsule and improving the display effect of the electronic ink screen.

[0086] This application further provides an electronic ink screen. Referring to FIG. 2, FIG. 2 is a structural schematic diagram of an embodiment of the electronic ink screen of this application. The electronic ink screen 20 includes a processor 21, a memory 22, a bus 23, and a plurality of electronic ink capsules 24. The plurality of electronic ink capsules 24 may be the plurality of electronic ink capsules described in any of the above embodiments, and the description thereof is omitted here.

[0087] The processor 21, the memory 22, and the plurality of electronic ink capsules 24 are respectively connected to the bus 23. Program instructions are stored in the memory 22, and the processor 21 is used to execute the program instructions to implement the control method of the electronic ink screen in the above embodiment.

[0088] In this embodiment, the processor 21 can be referred to as a Central Processing Unit (CPU). The processor 21 may be an integrated circuit chip having a signal processing function. The processor 21 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component. The general-purpose processor may be a microprocessor, or the processor 21 may be any conventional processor or the like.

[0089] Different from the prior art, in the technical solution of this application, by making the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsules within a preset period less than or equal to a preset difference threshold, the number of positive pressure refresh processes corresponding to the target capsules within the preset period can approach the number of negative pressure refresh processes. Furthermore, the number of times the amplitude of the control voltage signal received by the target capsules within the preset period reaches the maximum positive pressure value is close to the number of times the amplitude of the control voltage signal received by the target capsules reaches the maximum negative pressure value. Thereby, the situation where the target capsules receive positive pressure signals or negative pressure signals for a long time is avoided, the possibility of damage to the electronic ink capsules in the electronic ink screen is reduced, thereby reducing the ghosting phenomenon of the electronic ink screen and improving the display effect of the electronic ink screen.

[0090] This application further provides a control device for an electronic ink screen, which is applied to the electronic ink screen. Referring to FIG. 3, FIG. 3 is a structural schematic diagram of an embodiment of the control device for the electronic ink screen of this application. The electronic ink screen 30 includes a processor 31, a memory 32 and a bus 33. The electronic ink screen includes a plurality of electronic ink capsules described in any of the foregoing embodiments, and the description thereof is omitted here.

[0091] The processor 31 and the memory 32 are respectively connected to a bus 33. Program instructions are stored in the memory 32, and the processor 31 is used to execute the program instructions to implement the control method of the electronic ink screen in the above embodiment.

[0092] In this embodiment, the processor 31 can be called a Central Processing Unit (CPU). The processor 31 may be an integrated circuit chip having a signal processing function. The processor 31 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor, or the processor 31 may be any conventional processor or the like.

[0093] Different from the prior art, in the technical solution of the present application, by making the difference between the number of times of the positive-pressure refresh process and the number of times of the negative-pressure refresh process corresponding to the target capsules within a preset period less than or equal to a preset difference threshold, the number of times of the positive-pressure refresh process corresponding to the target capsules within the preset period can approach the number of times of the negative-pressure refresh process. Furthermore, the number of times that the amplitude of the control voltage signal received by the target capsules within the preset period reaches the maximum positive pressure value is close to the number of times that the amplitude of the control voltage signal received by the target capsules reaches the maximum negative pressure value. Thereby, the situation where the target capsules receive a positive-pressure signal or a negative-pressure signal for a long time is avoided, the possibility of damage to the electronic ink capsules in the electronic ink screen is reduced, thereby reducing the afterimage phenomenon of the electronic ink screen and improving the display effect of the electronic ink screen.

[0094] This application further provides a computer-readable storage medium. Referring to FIG. 4, FIG. 4 is a structural schematic diagram of an embodiment of the computer-readable storage medium of this application. Program instructions 41 are stored in the computer-readable storage medium 40, and the program instructions 41 are executed by a processor (not shown) to implement the above control method for the electronic ink screen.

[0095] The computer-readable storage medium 40 of this embodiment may be a USB disk, an SD card, a PD optical drive, a mobile hard disk, a large-capacity floppy drive, a flash memory, a multimedia memory card, a server, etc., but is not limited thereto.

[0096] Different from the prior art, in the technical solution of this application, by making the difference between the number of times of the positive-pressure refresh process and the number of times of the negative-pressure refresh process corresponding to the target capsules within a preset period be less than or equal to a preset difference threshold, the number of times of the positive-pressure refresh process corresponding to the target capsules within a preset period can approach the number of times of the negative-pressure refresh process. Furthermore, the number of times that the amplitude of the control voltage signal received by the target capsules within the preset period reaches the maximum positive pressure value is close to the number of times that the amplitude of the control voltage signal received by the target capsules reaches the maximum negative pressure value. Thereby, the situation where the target capsules receive a positive-pressure signal or a negative-pressure signal for a long time is avoided, the possibility of damage to the electronic ink capsules in the electronic ink screen is reduced, thereby reducing the afterimage phenomenon of the electronic ink screen and improving the display effect of the electronic ink screen.

[0097] This application also provides a control device for an electronic ink screen. The electronic ink screen includes a plurality of electronic ink capsules, and the electronic ink capsules include positively charged first color particles and negatively charged second color particles. The amplitude range of the control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative pressure value to a preset maximum positive pressure value, and one of the plurality of electronic ink capsules is used as a target capsule.

[0098] Referring to FIG. 5, FIG. 5 is a schematic structural diagram of an embodiment of the control device of the electronic ink screen of the present application. As shown in FIG. 5, the control device 50 includes a control unit 51.

[0099] The control unit 51 is configured to ensure that within a preset period, the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is not more than a preset difference threshold.

[0100] Here, the positive pressure refresh process increases the amplitude of the control voltage signal to a preset maximum positive pressure value, and then decreases the amplitude of the control voltage signal, so that the target capsule performs color display based on the control voltage signal, completing the refresh of one frame.

[0101] Here, the negative pressure refresh process decreases the amplitude of the control voltage signal to a preset maximum negative pressure value, and then increases the amplitude of the control voltage signal, so that the target capsule performs color display based on the control voltage signal, completing the refresh of one frame.

[0102] Specifically, the control unit can specifically execute the specific method steps described in the previous embodiment, but this will not be described again here.

[0103] Different from the prior art, in the technical solution of the present application, by making the difference between the number of times of the positive pressure refresh process and the number of times of the negative pressure refresh process corresponding to the target capsule within a preset period less than or equal to a preset difference threshold, the number of times of the positive pressure refresh process corresponding to the target capsule within the preset period can approach the number of times of the negative pressure refresh process. Further, the number of times that the amplitude of the control voltage signal received by the target capsule within the preset period reaches the maximum positive pressure value is close to the number of times that the amplitude of the control voltage signal received by the target capsule reaches the maximum negative pressure value. Thereby, the situation that the target capsule receives a positive pressure signal or a negative pressure signal for a long time is avoided, the possibility of damage to the electronic ink capsules in the electronic ink screen is reduced, thereby reducing the afterimage phenomenon of the electronic ink screen and improving the display effect of the electronic ink screen.

[0104] In the description of the present application, the reference terms such as "one embodiment", "some embodiments", "exemplification", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms are not necessarily limited to the same embodiment or exemplification. Further, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or exemplifications in a suitable manner. Further, unless they are mutually contradictory, those skilled in the art may combine different embodiments or examples described in this specification, and the features of different embodiments or examples can be combined.

[0105] Furthermore, the terms "first" and "second" are used for purposes of description only and should not be construed as indicating relative importance or implying any number of indicated technical features. Accordingly, features defined as "first" and "second" may explicitly or implicitly include at least one of those features. In the description of the present application, "a plurality" means at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0106] The description of any process or method illustrated in the flowchart or otherwise described herein can be understood as representing a module, segment, or portion of code that includes one or more executable instructions for implementing specific logical functions or steps of the process. Further, within the scope of the preferred embodiments of the present application, as would be understood by those of ordinary skill in the art to which the embodiments of the present application pertain, other implementation manners may be included in which the functions are not executed in the order illustrated or described, but are executed substantially simultaneously according to the functions or in the reverse order.

[0107] The logic and / or steps represented in a flowchart or otherwise described herein may be regarded as, for example, an ordered list of executable instructions for performing a logical function, may be implemented on any computer-readable medium, and may be used by or in combination with an instruction execution system, apparatus, or device (such as a personal computer, server, network device, or other system that fetches and executes instructions from an instruction execution system, device, or apparatus). As used herein, a "computer-readable medium" may be an instruction execution system, apparatus, or device that can accommodate, store, communicate, propagate, or transport a program, or a device used in combination with these instruction execution systems, apparatuses, or devices. More specific examples (non-exhaustive list) of computer-readable media include electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber devices, and portable optical disk read-only memory (CDROM). Further, the computer-readable medium may be paper or other suitable media on which a program is printed. For example, the paper or other media may be optically scanned, then edited, interpreted, or otherwise processed as appropriate, and the program may be electronically obtained and then stored in the computer's memory.

[0108] The above are embodiments of the present application and do not limit the scope of the patent of the present application. Any equivalent structural or equivalent process transformation performed using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, is similarly included within the scope of patent protection of the present application.

Claims

1. A method for controlling an electronic ink screen, wherein the electronic ink screen includes a plurality of electronic ink capsules, the electronic ink capsules include positively charged first color particles and negatively charged second color particles, an amplitude range of a control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative voltage value to a preset maximum positive voltage value, and one of the plurality of electronic ink capsules is taken as a target capsule, the method for controlling the electronic ink screen includes: within a preset period, a difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is less than or equal to a preset difference threshold, wherein the positive pressure refresh process includes increasing an amplitude of the control voltage signal to the preset maximum positive voltage value, and then decreasing the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal, and completing a refresh of one frame, the negative pressure refresh process includes decreasing the amplitude of the control voltage signal to the preset maximum negative voltage value, and then increasing the amplitude of the control voltage signal, so that the target capsule displays a color based on the control voltage signal, and completing a refresh of one frame. A method for controlling an electronic ink screen.

2. The method for controlling an electronic ink screen according to claim 1, wherein the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule being less than or equal to the preset difference threshold within the preset period includes that the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule are equal within the preset period.

3. The preset period corresponds to a period of two frames. One of the two frames is taken as a first frame, and the other frame is taken as a second frame. The difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule being less than or equal to the preset difference threshold within the preset period is During the period corresponding to the first frame, increase the amplitude of the control voltage signal to the preset maximum positive voltage value, and then reduce the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, complete the refresh of the first frame, during the period corresponding to the second frame, reduce the amplitude of the control voltage signal to the preset maximum negative voltage value, and then increase the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, and complete the refresh of one frame, or During the period corresponding to the first frame, reduce the amplitude of the control voltage signal to the preset maximum negative voltage value, and then increase the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, complete the refresh of the first frame, during the period corresponding to the second frame, increase the amplitude of the control voltage signal to the preset maximum positive voltage value, and then increase the amplitude of the control voltage signal, whereby the target capsule displays a color based on the control voltage signal, and complete the refresh of one frame, The method for controlling an electronic ink screen according to claim 1, comprising the above.

4. The preset period includes a first period and a second period, and the difference between the duration of the first period and the duration of the second period is equal to or less than a preset time difference threshold value. During the preset period, the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule is equal to or less than a preset difference threshold value. The method for controlling an electronic ink screen according to claim 1, comprising controlling the target capsule to display a color for each frame based on the positive pressure refresh process in the first period, and controlling the target capsule to display a color for each frame based on the negative pressure refresh process in the second period.

5. The number of frames in the first period is equal to the number of frames in the second period, and the number of frames in the first period or the number of frames in the second period is greater than 1. The method for controlling an electronic ink screen according to claim 4.

6. The duration of the period corresponding to each frame within the preset period is the same. The method for controlling an electronic ink screen according to claim 4.

7. The preset period includes a first period and a second period. The number of frames within the period corresponding to the first period is equal to the number of frames within the period corresponding to the second period. The period corresponding to the first period is within the period corresponding to the second period. Within the preset period, that the difference between the number of times of the positive pressure refresh process and the number of times of the negative pressure refresh process corresponding to the target capsule is less than or equal to a preset difference threshold value Based on the number of times of executing the negative pressure refresh process in the first period, determine the number of times of executing the positive pressure refresh process in the second period and record it as the positive pressure count. And based on the number of times of executing the positive pressure refresh process in the first period, determine the number of times of executing the negative pressure refresh process in the second period and record it as the negative pressure count. The method for controlling an electronic ink screen according to claim 1, including executing the positive pressure refresh process with the positive pressure count and the negative pressure refresh process with the negative pressure count in the second period.

8. Within the preset period, that the difference between the number of times of the positive pressure refresh process and the number of times of the negative pressure refresh process corresponding to the target capsule is less than or equal to a preset difference threshold value In the first period, when the target capsule displays a color based on the control voltage signal and completes the refresh of one frame, among the preset maximum negative pressure value and the preset maximum positive pressure value, determine the value closest to the current amplitude of the control voltage signal. If the closest value is the preset maximum negative pressure value, execute the negative pressure refresh process. If the closest value is the preset maximum positive pressure value, execute the positive pressure refresh process, including completing the refresh of the next frame. The method for controlling an electronic ink screen according to claim 7.

9. In the second period, executing the positive pressure refresh process with the positive pressure count and the negative pressure refresh process with the negative pressure count During the second period, when the target capsule displays a color based on the control voltage signal and completes the refresh of one frame, among the preset maximum negative pressure value and the preset maximum positive pressure value, determine the value closest to the current amplitude of the control voltage signal. If the closest value is the preset maximum negative pressure value, execute the negative pressure refresh process; if the closest value is the preset maximum positive pressure value, execute the positive pressure refresh process. Until the number of times of executing the positive pressure refresh process in the second period reaches the positive pressure count or the number of times of executing the negative pressure refresh process in the second period reaches the negative pressure count, execute the refresh of the next frame. The control method of the electronic ink screen according to claim 8, comprising this.

10. During the second period, executing the positive pressure refresh process of the positive pressure count and the negative pressure refresh process of the negative pressure count is During the second period, when the number of times of executing the positive pressure refresh process reaches the positive pressure count, control the target capsule to complete the refresh of each frame not refreshed in the second period based on the negative pressure refresh process. When the number of times of executing the negative pressure refresh process reaches the number of times of executing the negative pressure refresh process in the second period, control the target capsule to complete the refresh of each frame not refreshed in the second period based on the positive pressure refresh process. The control method of the electronic ink screen according to claim 9, comprising this.

11. The first color particles are white particles, the second color particles are black particles, or The first color particles are black particles, the second color particles are white particles. The control method of the electronic ink screen according to claim 1.

12. The ratio of the preset difference threshold value to the number of times of the positive pressure refresh process within the preset period is recorded as the first ratio, and / or the ratio of the preset difference threshold value to the number of times of the negative pressure refresh process is recorded as the second ratio. The control method of the electronic ink screen according to claim 1, wherein the first ratio is less than or equal to a preset ratio threshold value, and / or the second ratio is less than or equal to the preset ratio threshold value.

13. The control method of the electronic ink screen according to claim 1, wherein the duration of the preset period is less than or equal to the duration corresponding to a preset number of frames.

14. The control method of the electronic ink screen according to claim 13, wherein the preset number has a negative correlation with the usage time of the target capsule.

15. The control method of the electronic ink screen according to claim 13, wherein the usage time of the capsule with the longest usage time among the plurality of electronic ink capsules is recorded as the target usage time, and the preset number and the target usage time have a negative correlation.

16. A control device for an electronic ink screen, wherein the electronic ink screen includes a plurality of electronic ink capsules, the electronic ink capsules include positively charged first color particles and negatively charged second color particles, the amplitude range of the control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative voltage value to a preset maximum positive voltage value, and one of the plurality of electronic ink capsules is used as a target capsule, the control device includes a control unit, and the control unit is used to ensure that the difference between the number of positive pressure refresh processes and the number of negative pressure refresh processes corresponding to the target capsule within a preset period is less than or equal to a preset difference threshold value, wherein the positive pressure refresh process includes increasing the amplitude of the control voltage signal to the preset maximum positive voltage value, and then decreasing the amplitude of the control voltage signal, and the target capsule displays a color based on the control voltage signal to complete the refresh of one frame, the negative pressure refresh process includes decreasing the amplitude of the control voltage signal to the preset maximum negative voltage value, and then increasing the amplitude of the control voltage signal, and the target capsule displays a color based on the control voltage signal to complete the refresh of one frame, a control device for an electronic ink screen.

17. The control unit according to claim 16, which is used to make the number of times of the positive pressure refresh process corresponding to the target capsule equal to the number of times of the negative pressure refresh process within the preset period.

18. The preset period corresponds to the period of two frames. One of the two frames is defined as the first frame, and the other frame is defined as the second frame. The control unit In the period corresponding to the first frame, the amplitude of the control voltage signal is increased to the preset maximum positive voltage value, and then the amplitude of the control voltage signal is decreased, whereby the target capsule displays a color based on the control voltage signal, completing the refresh of the first frame. In the period corresponding to the second frame, the amplitude of the control voltage signal is decreased to the preset maximum negative voltage value, and then the amplitude of the control voltage signal is increased, whereby the target capsule displays a color based on the control voltage signal, used to complete the refresh of one frame, or In the period corresponding to the first frame, the amplitude of the control voltage signal is decreased to the preset maximum negative voltage value, and then the amplitude of the control voltage signal is increased, whereby the target capsule displays a color based on the control voltage signal, completing the refresh of the first frame. In the period corresponding to the second frame, the amplitude of the control voltage signal is increased to the preset maximum positive voltage value, and then the amplitude of the control voltage signal is increased, whereby the target capsule displays a color based on the control voltage signal, used to complete the refresh of one frame, the control device for an electronic ink screen according to claim 16.

19. The preset period includes a first period and a second period, and the difference between the duration of the first period and the duration of the second period is equal to or less than a preset time difference threshold. The control unit is used to control the target capsule to display a color for each frame based on the positive pressure refresh process in the first period, and control the target capsule to display a color for each frame based on the negative pressure refresh process in the second period, the control device for an electronic ink screen according to claim 16.

20. An electronic ink screen including a memory, a processor, and a plurality of electronic ink capsules, wherein the electronic ink capsules include positively charged first color particles and negatively charged second color particles, the amplitude range of the control voltage signal corresponding to the electronic ink capsules is from a preset maximum negative voltage value to a preset maximum positive voltage value, and one of the plurality of electronic ink capsules is taken as a target capsule, the memory is used for storing program instructions, and the processor is used for executing the program instructions to implement the control method of the electronic ink screen according to claim 1. An electronic ink screen.

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