Display control method, electronic paper equipment and computer readable storage medium

Abstract

The invention discloses a display control method, electronic paper equipment and a computer readable storage medium. The display control method comprises the steps of determining an oscillation waveform of a target pixel according to a previous display color of the target pixel under the condition that the electronic paper equipment is in a preset display stage; and according to the oscillation waveform, applying a driving voltage to the target pixel, and driving the charged particles in the target pixel to move, so that the target pixel realizes a target display effect. According to the display control method, the oscillation waveform is correspondingly selected to oscillate the charged particles of the target pixel according to the previous display color of the pixel, so that the target pixel can display the target display effect, all the pixels in the electronic paper equipment display the target display effect after the preset display stage, and the display quality of the electronic paper equipment is improved. In other words, the display effects of all pixels of the target electronic paper device are the same, and ghost shadows generated under the drive of the same oscillation waveform due to different previous display colors are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of electronic paper, and more particularly, to a display control method, an electronic paper device, and a computer-readable storage medium. Background Art

[0002] Due to advantages such as ultra-low power consumption, paper-like display, and wide viewing angle, electronic paper devices have been widely used in many scenarios such as flat panel displays, labels, and billboards. The display of electronic paper mainly includes four stages: a balancing stage, an oscillation stage, a push-pull stage, and a display stage. Among them, the preset display stage is to evenly disperse the charged particles in all pixels of the electronic paper device for the imaging of the next picture.

[0003] In the related art, it is difficult to control the uniform distribution of charged particles in all pixels during the preset display stage, resulting in afterimages when the picture is switched, which affects the user experience. Summary of the Invention

[0004] Embodiments of the present application provide a display control method, an electronic paper device, and a computer-readable storage medium.

[0005] Embodiments of the present application provide a display control method for an electronic paper device, and the display control method includes:

[0006] When the electronic paper device is in the preset display stage, determining an oscillation waveform of a target pixel according to a previous display color of the target pixel;

[0007] Applying a driving voltage to the target pixel according to the oscillation waveform to drive the movement of charged particles in the target pixel so that the target pixel achieves a target display effect.

[0008] In this way, in the display control method, electronic paper device, and computer-readable storage medium of the embodiments of the present application, by corresponding to select an oscillation waveform to oscillate the charged particles of the target pixel according to the previous display color of the pixel, the target pixel can display the target display effect, so that after passing through the preset display stage, all pixels in the electronic paper device display the target display effect, that is, the display effects of all pixels of the electronic paper device are the same, avoiding afterimages generated under the drive of the same oscillation waveform due to different previous display colors.

[0009] In some embodiments, the determining an oscillation waveform of a target pixel according to a previous display color of the target pixel includes:

[0010] When the previous display color of the target pixel is a first color, determining that the oscillation waveform is a first oscillation waveform;

[0011] When the previous display color of the target pixel is the second color, determine that the oscillation waveform is the second oscillation waveform, the brightness of the first color is greater than the brightness of the second color, and the first voltage duration in the first oscillation waveform is less than the first voltage duration in the second oscillation waveform.

[0012] In some embodiments, the first oscillation waveform sequentially includes a first non-uniform frame wave and a second non-uniform frame wave, and both the first non-uniform frame wave and the second non-uniform frame wave include alternately applied first voltage and second voltage.

[0013] In some embodiments, in one alternation, the sum of the duration of applying the first voltage and the duration of applying the second voltage is a first preset time. In the first non-uniform frame wave, the duration of applying the first voltage each time is greater than the duration of applying the first voltage each time in the second non-uniform frame wave, and the alternation times of the second voltage and the first voltage in the first non-uniform frame wave are less than the alternation times in the second non-uniform frame wave.

[0014] In some embodiments, the second oscillation waveform sequentially includes a third non-uniform frame wave and a fourth non-uniform frame wave, and both the third non-uniform frame wave and the fourth non-uniform frame wave include alternately applied second voltage and first voltage.

[0015] In some embodiments, in one alternation, the sum of the duration of applying the first voltage and the duration of applying the second voltage is a second preset time. In the third non-uniform frame wave, the duration of applying the first voltage each time is greater than the duration of applying the first voltage each time in the fourth non-uniform frame wave, and the alternation times of the second voltage and the first voltage in the third non-uniform frame wave are greater than the alternation times in the fourth non-uniform frame wave.

[0016] In some embodiments, the charged particles of the target pixel include a first particle and a second particle, the driving voltage of the first particle is the second voltage, and the driving voltage of the second particle is the first voltage.

[0017] In some embodiments, the second oscillation waveform includes a first oscillation sub-waveform and a second oscillation sub-waveform. When the previous display color of the target pixel is the second color, determining that the oscillation waveform is the second oscillation waveform includes:

[0018] When the previous display color of the target pixel is the first sub-color, determine that the oscillation waveform is the first oscillation sub-waveform;

[0019] When the previous display color of the target pixel is the second sub-color, determine that the oscillation waveform is the second oscillation sub-waveform, the brightness of the first sub-color is greater than the brightness of the second sub-color, and the first voltage duration in the first oscillation sub-waveform is greater than the first voltage duration in the second oscillation sub-waveform.

[0020] In some embodiments, the first oscillation sub-waveform further includes a positive oscillation waveform, the positive oscillation waveform includes alternately applied first voltage and third voltage, and the duration of each application of the first voltage is the same as the duration of each application of the third voltage, and the first voltage is greater than the third voltage.

[0021] In some embodiments, the charged particles include first sub-particles and second sub-particles, the driving voltages of the first sub-particles and the second sub-particles are the first voltage, and the driving voltage of the first sub-particles is less than the driving voltage of the second sub-particles.

[0022] In some embodiments, the oscillation waveform includes a first equal-frame waveform and a second equal-frame waveform. In the first equal-frame waveform, a first voltage lasting for a third preset time and a second voltage lasting for the third preset time are alternately applied. In the second equal-frame waveform, a first voltage lasting for a fourth preset time and a second voltage lasting for the fourth preset time are alternately applied, and the third preset time is greater than the fourth preset time.

[0023] An embodiment of the present application provides an electronic paper device, the electronic device includes one or more processors and a memory, the memory stores a computer program, and when the computer program is executed by the processor, the steps of the method according to any of the above embodiments are implemented.

[0024] An embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method according to any of the above embodiments are implemented.

[0025] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0027] Figure 1 is a schematic flowchart of a display control method according to some embodiments of the present application;

[0028] Figure 2Schematic diagram of an electronic paper device in the related art switching display screens;

[0029] Figure 3 Schematic diagram of an electronic paper device in some embodiments of the present application switching display screens;

[0030] Figure 4 Schematic diagram of an electronic paper device in some embodiments of the present application switching display screens;

[0031] Figure 5 Schematic flowchart of a display control method in some embodiments of the present application;

[0032] Figure 6 Schematic diagram of an oscillation waveform in some embodiments of the present application;

[0033] Figure 7 Schematic diagram of an oscillation waveform in some embodiments of the present application;

[0034] Figure 8 Schematic flowchart of a display control method in some embodiments of the present application;

[0035] Figure 9 Schematic diagram of the display effect of different black waveforms in some embodiments of the present application after being processed through the same oscillation stage. Specific embodiments

[0036] The following details the embodiments of the present application. The embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0037] Due to advantages such as ultra-low power consumption, paper-like display, and wide viewing angle, electronic paper devices have been widely used in many scenarios such as flat panel displays, labels, and display boards, and maintain a high-speed development trend. Currently, all electronic papers adopt electrophoretic display technology mainly based on microcapsule or microcup structures. The charged colored particles suspended in the electrophoretic liquid in the microcapsules or microcups are driven by the Vcom electrode on the paper film and the pixel electrode on the TFT substrate to move to the surface layer of the paper film, and an image is formed under the reflection of ambient light. To obtain a good display effect, a specific source signal is required to drive 2 to 4 kinds of charged colored particles to be distributed at different positions in the microcapsules or microcups to present the desired display effect.

[0038] The display process of electronic paper mainly includes four stages: a balancing stage, an oscillation stage, a pushing and pulling stage, and a display stage. Among them, the oscillation stage is to evenly disperse the charged particles in all pixels of the electronic paper device so as to form an image for the next screen.

[0039] In the related art, it is difficult to control the uniform distribution of charged particles in all pixels during the oscillation stage, resulting in afterimages when the screen is switched, which affects the user experience.

[0040] Based on the above possible problems, please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a display control method for an electronic paper device. The display control method includes:

[0041] 01: When the electronic paper device is in a preset display stage, determine the oscillation waveform of the target pixel according to the previous display color of the target pixel;

[0042] 02: Apply a driving voltage to the target pixel according to the oscillation waveform to drive the movement of charged particles in the target pixel so that the target pixel achieves the target display effect.

[0043] An embodiment of the present application provides an electronic paper device. The electronic device includes one or more processors and a memory. The memory stores a computer program that can be executed by the processor. The processor can be used to: when the electronic paper device is in a preset display stage, determine the oscillation waveform of the target pixel according to the previous display color of the target pixel; apply a driving voltage to the target pixel according to the oscillation waveform to drive the movement of charged particles in the target pixel so that the target pixel achieves the target display effect.

[0044] An embodiment of the present application provides a display control device. The display control device includes a determination module and a driving module. Among them, the determination module can be used to determine the oscillation waveform of the target pixel according to the previous display color of the target pixel when the electronic paper device is in a preset display stage; the driving module can be used to apply a driving voltage to the target pixel according to the oscillation waveform to drive the movement of charged particles in the target pixel so that the target pixel achieves the target display effect.

[0045] In the related art, among the four display stages of the electronic paper, the role of the balance stage is to prevent the charged particles from moving directionally under the action of a single-polarity electric field after being refreshed multiple times; the role of the oscillation stage is to evenly disperse all the particles in the previous picture to achieve a clear disk for the imaging of the next picture; the role of the push-pull stage is to pre-stratify the particles to be displayed with other particles; the role of the complementary color stage is to finally form an image. However, due to problems such as differences in the migration rate of paper film particles, differences in the design of the TFT substrate, and differences in the debugging of the electronic paper waveform, the electronic paper device cannot achieve the expected display effect after the oscillation stage, resulting in afterimages between two display pictures.

[0046] Specifically, the screen of the electronic paper device includes multiple pixels. Please refer to Figure 2, when the pixels of the e-paper device display different colors, the distribution of charged particles in the pixels is different. If the same oscillation voltage is used to oscillate all pixels, it will lead to different oscillation driving effects and cause image retention on the screen. For example, in the case where black particles and red particles carry positive charges, and white particles and yellow particles carry negative charges, after the vibration stage, since the particles with positive charges will have a higher brightness than the particles with negative charges, the display effect of the pixels whose previous display color was black or red will be brighter than the display effect of the pixels whose previous display color was yellow or white. In Figure 2 and Figure 3 , (a) is the display screen of the previous frame, (b) is the display effect after the oscillation stage, and (c) is the display screen of the current frame.

[0047] Please refer to Figure 3 and Figure 4 , in the implementation manner of the present application, the oscillation waveform of the target pixel is determined specifically according to the previous display color of the target pixel. Then, according to the oscillation waveform, a driving voltage is applied to the target pixel to drive the movement of the charged particles in the target pixel, so that the target pixel achieves the target display effect, where the target pixel is any pixel in the screen of the e-paper device, and the target display effect is a preset display color or / and display brightness. Figure 3 (b) is the target display effect in one embodiment.

[0048] The preset display stage can be the oscillation stage in the e-paper display process. During the oscillation stage, the oscillation waveform of the target pixel is determined according to the previous display color of the target pixel. That is to say, for different pixels in the screen of the e-paper device, the oscillation waveforms are determined specifically according to their previous display colors respectively. Among them, the previous display color refers to the color displayed by the target pixel when the previous frame of the screen was displayed.

[0049] In the implementation manner of the present application, the waveforms of four stages corresponding to various colors are pre-debugged, and the debugging method is more intuitive, which is convenient for waveform debugging work. It makes up for the differences in the migration rates of different particles driven by the same waveform and the problem of insufficient actual charging voltage of the TFT substrate, and fundamentally solves the problem of image retention.

[0050] In this way, in the display control method, e-paper device, and computer-readable storage medium of the implementation manner of the present application, by correspondingly selecting the oscillation waveform according to the previous display color of the pixel to oscillate the charged particles of the target pixel, the target pixel can display the target display effect. Thus, after the preset display stage, all pixels in the e-paper device display the target display effect, that is, the display effects of all pixels in the e-paper device are the same, avoiding image retention caused by different previous display colors under the drive of the same oscillation waveform.

[0051] Please refer to Figure 5 andFigure 6 , in some embodiments, step 01, determining the oscillation waveform of the target pixel according to the previous display color of the target pixel, includes:

[0052] 011: when the previous display color of the target pixel is the first color, determining that the oscillation waveform is the first oscillation waveform;

[0053] 012: when the previous display color of the target pixel is the second color, determining that the oscillation waveform is the second oscillation waveform, the brightness of the first color is greater than the brightness of the second color, and the duration of the first voltage in the first oscillation waveform is less than the duration of the first voltage in the second oscillation waveform.

[0054] In some embodiments, the processor can be used to determine that the oscillation waveform is the first oscillation waveform when the previous display color of the target pixel is the first color; and determine that the oscillation waveform is the second oscillation waveform when the previous display color of the target pixel is the second color.

[0055] In some embodiments, the determination module includes a first determination sub-module and a second determination sub-module. Among them, the first determination sub-module can be used to determine that the oscillation waveform is the first oscillation waveform when the previous display color of the target pixel is the first color; the second determination sub-module can be used to determine that the oscillation waveform is the second oscillation waveform when the previous display color of the target pixel is the second color.

[0056] Specifically, the first color includes one or more colors. The second color includes one or more colors different from the first color. For example, the first color includes white and yellow, and the second color includes black and red.

[0057] Among them, the brightness of the first color is greater than the brightness of the second color. That is, when displaying the first color, the particles with higher brightness in the pixel are located closer to the screen, and the particles with lower brightness are located farther from the screen; when displaying the second color, the particles with lower brightness in the pixel are located closer to the screen, and the particles with higher brightness are located farther from the screen.

[0058] The first oscillation waveform and the second oscillation waveform can be pre-stored in the e-paper device. For example, the first oscillation waveform and the second oscillation waveform are stored in the Look-Up Table (LUT) of the e-paper device.

[0059] In related technologies, according to debugging experience, the display colors of the previous display screen are different at different pixels, resulting in different particle distributions, which is the cause of image retention. For example, when the oscillation waveform is a reciprocating cycle of 2 frames of -15V low voltage followed by 2 frames of +15V high voltage, the red and black colors will glow at the end of the oscillation stage, and the yellow and white colors will become dim at the end of the oscillation stage. This is because the red particles and black particles of the red and black screens are distributed in the upper layer of the microcapsules, and the yellow and white particles are distributed in the lower layer of the microcapsules. When a signal with equal numbers of positive and negative voltage frames is applied, the particles originally close to the upper layer will move more downward, and the particles originally close to the lower layer will move more upward. Therefore, when applying the driving voltage of the same oscillation waveform in a state of different particle distributions, the particles cannot be made to have the same distribution.

[0060] In an embodiment of the present application, when the previous display color of the target pixel is the first color, the oscillation waveform of the target pixel is determined to be the first oscillation waveform corresponding to the first color. When the previous display color of the target pixel is the second color, the oscillation waveform of the target pixel is determined to be the second oscillation waveform corresponding to the second color. The first oscillation waveform is selected for the first color, the second oscillation waveform is selected for the second color, and a driving voltage is applied to the charged particles of the target pixel according to the first oscillation waveform or the second oscillation waveform, so that the target pixel can achieve the target display effect.

[0061] Among them, the duration of the first voltage in the first oscillation waveform is less than the duration of the first voltage in the second oscillation waveform. The first voltage refers to a high level with a voltage greater than a preset voltage. The preset voltage can be set according to actual requirements.

[0062] In the oscillation stage, if the proportion of the first voltage of the driving voltage is large, the positively charged particles can be made to move in the direction close to the screen. Since the duration of the first voltage in the first oscillation waveform is less than the duration of the first voltage in the second oscillation waveform, the driving force of the driving voltage of the first oscillation waveform on the positively charged particles is smaller than the driving force of the driving voltage of the second oscillation waveform on the positively charged particles.

[0063] In some embodiments, the charged particles of the target pixel include a first particle and a second particle. The driving voltage of the first particle is the second voltage, and the driving voltage of the second particle is the first voltage. For example, the first particle is a charged particle of the first color, and the second particle is a charged particle of the second color. Since the charged particles of the first color carry negative charges and the charged particles of the second color carry positive charges, that is, the driving voltage of the first particle is the first voltage and the driving voltage of the second particle is the second voltage. Therefore, the driving force of the first oscillation waveform on the charged particles of the second color is small, and the driving force of the second oscillation waveform on the charged particles of the second color is small.

[0064] In one embodiment, the first color is white or yellow, which are collectively referred to as yellow - white hereinafter. The second color is black or red, which are collectively referred to as red - black hereinafter. When oscillating with a driving voltage that alternately balances positive and negative voltages, the oscillation result of the pixels of the first color shows a darker brightness than that of the pixels of the second color. And the duration of the first voltage of the first oscillation waveform is shorter, resulting in a weaker driving force on the red - black particles. Similarly, the duration of the first voltage of the second oscillation waveform is longer, making its driving force on the red - black particles stronger.

[0065] When applying the driving voltage of the first oscillation waveform to the target pixels whose previous display color is the first color, when driving the charged particles to move, after completing the oscillation stage, the display result of the target pixels is brighter than the oscillation result of the balanced - alternating driving voltage. Similarly, when applying the driving voltage of the second oscillation waveform to the target pixels whose previous display color is the second color, when driving the charged particles to move, after completing the oscillation stage, the display result of the target pixels is darker than the oscillation result of the balanced - alternating driving voltage. Thus, it offsets the influence of the balanced - alternating driving voltage that causes the particles closer to the upper layer to move more downward and the particles originally closer to the lower layer to move more upward, so that the pixels with the previous display color being the first color and the pixels with the previous display color being the second color can both achieve the same target display effect after passing through the oscillation stage.

[0066] In this way, for the target pixels whose previous display color is the first color with a greater brightness, the oscillation waveform is determined as the first oscillation waveform with a smaller first - voltage ratio; for the target pixels whose previous display color is the second color with a smaller brightness, the oscillation waveform is determined as the second oscillation waveform with a larger first - voltage ratio, so as to achieve targeted selection of corresponding oscillation waveforms for different previous display colors.

[0067] Please refer to Figure 6 and Figure 7 , in some embodiments, the first oscillation waveform sequentially includes a first non - equal - frame wave and a second non - equal - frame wave, and both the first non - equal - frame wave and the second non - equal - frame wave include alternately applied first voltage and second voltage.

[0068] Specifically, both the first non - equal - frame wave and the second non - equal - frame wave include alternately applied first voltage and second voltage. And the ratio of the first voltage in the first non - equal - frame wave is different from the ratio of the second voltage in the second non - equal - frame wave.

[0069] Among them, the voltages of the first voltage and the second voltage are different. For example, the first voltage is a positive voltage and the second voltage is a negative voltage. When the proportion of the first voltage in the oscillation waveform is greater than the proportion of the second voltage, the driving voltage of the oscillation waveform drives the positively charged particles to move towards the screen, and the negatively charged particles to move away from the screen. When the proportion of the first voltage in the oscillation waveform is less than the proportion of the second voltage, the driving voltage of the oscillation waveform drives the negatively charged particles to move towards the screen, and the positively charged particles to move away from the screen.

[0070] In this way, by applying the first non-uniform frame wave and the second non-uniform frame wave to the pixel, the particles with different charges in the pixel can be respectively controlled to move towards the screen, so as to achieve the balanced oscillation of the charged particles in the pixel.

[0071] In some embodiments, in one alternation, the sum of the duration of applying the first voltage and the duration of applying the second voltage is a first preset time. In the first non-uniform frame wave, the duration of applying the first voltage each time is greater than the duration of applying the first voltage each time in the second non-uniform frame wave, and the number of alternations of the second voltage and the first voltage in the first non-uniform frame wave is less than the number of alternations in the second non-uniform frame wave.

[0072] Specifically, in the first oscillation waveform, for the alternation process of the first voltage and the second voltage, the duration of each alternation process is the same, which is the first preset time. The first preset time is a preset time value and can be set according to actual needs.

[0073] In the first non-uniform frame wave, the duration of applying the first voltage each time is greater than the duration of applying the first voltage each time in the second non-uniform frame wave. Since the duration of each alternation of the first voltage and the second voltage is the same, therefore, in the first non-uniform frame wave, the duration of applying the second voltage each time is less than the duration of applying the second voltage each time in the second non-uniform frame wave.

[0074] For example, in the first non-uniform frame wave, in one alternation, the duration of the first voltage is 8 frames, the duration of the second voltage is 2 frames, the sum of the durations of the first voltage and the second voltage is 10 frames, and the alternation is 7 times, and the first voltage is applied first and then the second voltage is applied. In the first non-uniform frame wave, in one alternation, the duration of the second voltage is 8 frames, the duration of the first voltage is 2 frames, the sum of the durations of the first voltage and the second voltage is also 10 frames, and the alternation is 13 times, and the first voltage is applied first and then the second voltage is applied.

[0075] The number of alternations between the second voltage and the first voltage in the first non-uniform frame wave is less than that in the second non-uniform frame wave. Understandably, the duration of the first non-uniform frame wave is greater than that of the second non-uniform frame wave. Also, since the duration of the first voltage in the first non-uniform frame wave is longer, the proportion of the first voltage in the first oscillation waveform is greater than that of the second voltage.

[0076] In one embodiment, a driving voltage of the first oscillation waveform is applied to a pixel whose previous display color is yellow or white. When the driving voltage of the first non-uniform frame wave is applied, the yellow and white particles in the pixel move downward, and the red and black particles in the pixel move upward; when the driving voltage of the second non-uniform frame wave is applied, the yellow and white particles in the pixel move upward, and the red and black particles in the pixel move downward. After the oscillation stage ends, the yellow and white particles and the red and black particles are evenly distributed, enabling the pixel to achieve the target display effect.

[0077] Thus, by setting the first non-uniform frame wave and the second non-uniform frame wave, the charged particles in the target pixel can be evenly distributed under the action of the driving voltage of the first oscillation waveform, thereby achieving the target display effect.

[0078] Please refer to Figure 6 and Figure 7 , in some embodiments, the second oscillation waveform sequentially includes a third non-uniform frame wave and a fourth non-uniform frame wave, and both the third non-uniform frame wave and the fourth non-uniform frame wave include alternately applied second voltage and first voltage.

[0079] Specifically, both the third non-uniform frame wave and the fourth non-uniform frame wave include alternately applied first voltage and second voltage. And the proportion of the first voltage in the third non-uniform frame wave is different from the proportion of the second voltage in the fourth non-uniform frame wave.

[0080] Thus, by applying the third non-uniform frame wave and the fourth non-uniform frame wave to the pixel, the particles with different charges in the pixel can be respectively controlled to move towards the screen to achieve balanced oscillation of the charged particles in the pixel.

[0081] In some embodiments, in one alternation, the sum of the duration of applying the first voltage and the duration of applying the second voltage is a second preset time. In the third non-uniform frame wave, the duration of each application of the first voltage is greater than the duration of each application of the first voltage in the fourth non-uniform frame wave, and the number of alternations between the second voltage and the first voltage in the third non-uniform frame wave is greater than that in the fourth non-uniform frame wave.

[0082] Specifically, in the second oscillation waveform, for the alternation process between the first voltage and the second voltage, the duration of each alternation process is the same and is the second preset time. Among them, the second preset time is a preset time value and can be set according to actual needs.

[0083] In the third non-uniform frame wave, the duration of each application of the first voltage is greater than the duration of each application of the first voltage in the fourth non-uniform frame wave. Since the duration of each alternation between the first voltage and the second voltage is the same, therefore, in the third non-uniform frame wave, the duration of each application of the second voltage is less than the duration of each application of the second voltage in the fourth non-uniform frame wave.

[0084] The number of alternations between the second voltage and the first voltage in the third non-uniform frame wave is greater than the number of alternations in the fourth non-uniform frame wave. It can be understood that the duration of the third non-uniform frame wave is greater than the duration of the fourth non-uniform frame wave. Also, since the duration of the first voltage in the third non-uniform frame wave is longer, therefore, in the second oscillation waveform, the proportion of the first voltage is greater than the proportion of the second voltage.

[0085] For example, in the third non-uniform frame wave, in one alternation, the duration of the first voltage is 8 frames, the duration of the second voltage is 2 frames, the sum of the durations of the first voltage and the second voltage is 10 frames, and the alternation occurs 13 times, and the second voltage is applied first and then the first voltage. In the third non-uniform frame wave, in one alternation, the duration of the second voltage is 8 frames, the duration of the first voltage is 2 frames, and the sum of the durations of the first voltage and the second voltage is also 10 frames, and the alternation occurs 7 times, and the second voltage is applied first and then the first voltage.

[0086] In one embodiment, a driving voltage of the second oscillation waveform is applied to a pixel whose previous display color is red or black. When the driving voltage of the third non-uniform frame wave is applied, the yellow-white particles in the pixel move downward, and the red-black particles in the pixel move upward; when the driving voltage of the fourth non-uniform frame wave is applied, the yellow-white particles in the pixel move upward, and the red-black particles in the pixel move downward. After the oscillation stage ends, the yellow-white particles and the red-black particles are evenly distributed, enabling the pixel to achieve the target display effect.

[0087] In this way, by setting the third non-uniform frame wave and the fourth non-uniform frame wave, it is possible to make the charged particles in the target pixel evenly distributed under the action of the driving voltage of the second oscillation waveform, thereby enabling the target display effect to be achieved.

[0088] Please refer to Figure 8 , in some embodiments, the second oscillation waveform includes a first oscillation sub-waveform and a second oscillation sub-waveform. Step 012, when the previous display color of the target pixel is the second color, determining that the oscillation waveform is the second oscillation waveform includes:

[0089] 0121: When the previous display color of the target pixel is the first sub-color, determining that the oscillation waveform is the first oscillation sub-waveform;

[0090] 0122: When the previous display color of the target pixel is the second sub-color, determine that the oscillation waveform is the second oscillation sub-waveform, the brightness of the first sub-color is greater than that of the second sub-color, and the first voltage duration in the first oscillation sub-waveform is greater than the first voltage duration in the second oscillation sub-waveform.

[0091] In some embodiments, the processor can be used to determine that the oscillation waveform is the first oscillation sub-waveform when the previous display color of the target pixel is the first sub-color; and determine that the oscillation waveform is the second oscillation sub-waveform when the previous display color of the target pixel is the second sub-color.

[0092] In some embodiments, the second determination sub-module includes a first determination unit and a second determination unit. The first determination unit can be used to determine that the oscillation waveform is the first oscillation sub-waveform when the previous display color of the target pixel is the first sub-color; and the second determination unit can be used to determine that the oscillation waveform is the second oscillation sub-waveform when the previous display color of the target pixel is the second sub-color.

[0093] Specifically, the second color includes a first sub-color and a second sub-color. For example, the first sub-color is red and the second sub-color is black. The display brightness of the first sub-color is greater than that of the second sub-color. The charge amounts of the charged particles of the first sub-color and the charged particles of the second sub-color are different, such that the driving voltages of the charged particles of the first sub-color and the charged particles of the second sub-color are different.

[0094] When the previous display color of the target pixel is the first sub-color, the charged particles of the first sub-color are closest to the screen. At this time, determine that the oscillation waveform is the first oscillation sub-waveform with a longer first voltage duration. When the previous display color of the target pixel is the second sub-color, the charged particles of the second sub-color are closest to the screen. At this time, determine that the oscillation waveform is the second oscillation sub-waveform with a longer first voltage duration.

[0095] In some embodiments, the charged particles include a first sub-particle and a second sub-particle, the driving voltages of the first sub-particle and the second sub-particle are the first voltage, and the driving voltage of the first sub-particle is less than the driving voltage of the second sub-particle.

[0096] Since the driving voltage of the first sub-particle is less than that of the second sub-particle, and the driving voltages of both the first sub-particle and the second sub-particle are the first voltage, and the duration of the first voltage in the first oscillator waveform is greater than that in the second oscillator waveform, the driving force of the driving voltage of the first oscillator waveform on the first sub-particle is greater than that of the driving voltage of the second oscillator waveform on the first sub-particle, and the driving force of the driving voltage of the first oscillator waveform on the second sub-particle is greater than that of the driving voltage of the second oscillator waveform on the second sub-particle. Moreover, the driving force of the driving voltage of the first oscillator waveform on the first sub-particle is less than that on the second sub-particle, and the driving force of the driving voltage of the second oscillator waveform on the first sub-particle is less than that on the second sub-particle.

[0097] In one embodiment, the first sub-particle is a red particle and the second sub-particle is a black particle. The value range of the driving voltage of the first sub-particle is from 3V to 12V, and the driving voltage of the second sub-particle is 15V.

[0098] Thus, by specifically setting the first oscillator waveform and the second oscillator waveform for the first sub-color and the second sub-color with different brightnesses respectively, it is possible to achieve the same target display effect after oscillating the pixels with the previous display colors being the first sub-color and the second sub-color.

[0099] In some embodiments, the first oscillator waveform further includes a positive oscillation waveform, which includes alternately applied first voltage and third voltage, and the duration of each application of the first voltage is the same as that of each application of the third voltage, and the first voltage is greater than the third voltage.

[0100] Specifically, the first voltage and the third voltage are alternately applied in the positive oscillation waveform. Among them, the third voltage is a preset voltage value, and the first voltage is greater than the third voltage. For example, the third voltage can be 0V.

[0101] In each alternation, the duration of applying the first voltage is the same as that of applying the third voltage.

[0102] In one embodiment, the positive oscillation waveform includes 2 frames of the third voltage and 2 frames of the first voltage, alternating 10 times, and the third voltage is applied first and then the first voltage.

[0103] Since, under the drive voltage of the same oscillating waveform, the pixels with the previous display color of red have a higher display brightness than the pixels with the display color of black, when performing oscillation, it is necessary to further push the black particles in the pixels with the previous display color of red closer to the screen in order to achieve the balance of charged particles within the pixels. By driving the movement of the charged particles in the pixels according to the first oscillating sub-waveform including the positive oscillating waveform, the second sub-particles with lower brightness in the pixels can be further pushed closer to the screen, so that after the oscillation stage is completed, the pixels can achieve the target display effect.

[0104] In this way, by setting the positive oscillating waveform in the first oscillating sub-waveform, the pixels with the previous display color of the first sub-color can be further driven to achieve the target display effect.

[0105] In some embodiments, the oscillating waveform includes a first equal-frame waveform and a second equal-frame waveform. In the first equal-frame waveform, a first voltage lasting for a third preset time and a second voltage lasting for a third preset time are alternately applied. In the second equal-frame waveform, a first voltage lasting for a fourth preset time and a second voltage lasting for a fourth preset time are alternately applied, and the third preset time is greater than the fourth preset time.

[0106] Specifically, both the first equal-frame waveform and the second equal-frame waveform include alternately applied first voltage and second voltage. In the first equal-frame waveform, the duration of each application of the first voltage and each application of the second voltage is the same, and both are the third preset time. In the second equal-frame waveform, the duration of each application of the first voltage and each application of the second voltage is the same, and both are the fourth preset time. The drive voltage of the first equal-frame waveform has a longer voltage action time and a small number of cycles, which is used to disperse particles of different polarities. The drive voltage of the second equal-frame waveform has a shorter limit voltage action time and a large number of cycles, which is used to disperse polar particles of the same polarity but different sizes.

[0107] Both the third preset time and the fourth preset time are preset time values, which can be set according to actual needs, and the third preset time is greater than the fourth preset time.

[0108] In one embodiment, the third preset time is 18 frames, and the fourth preset time is 2 frames. That is to say, the first equal-frame waveform includes alternately applied 18 frames of first voltage and 18 frames of second voltage, alternating 4 times. The second equal-frame waveform includes alternately applied 2 frames of first voltage and 2 frames of second voltage, alternating 28 times.

[0109] It should be noted that the afterimage situation after the oscillation stage is directly related to the color display waveform of the previous frame of the display screen. Taking two black waveforms as an example, such as Figure 9As shown, the number of frames with a +15V voltage applied during the display phase of the first black waveform is more than that of the second black waveform, resulting in different position distributions of the black particles driven by the two waveforms. Therefore, the waveform debugging sequence should first debug the waveform during the display phase to meet the required optical specifications, and then debug the waveform during the oscillation phase to solve the afterimage problem.

[0110] In another embodiment, please refer to Figure 7 , the first equal-frame waveforms of the four colors are the same, each being 18 frames of high voltage H connected to 18 frames of low voltage L alternating 4 times, and the second equal-frame waveforms are also the same, each being 2 frames of high voltage H connected to 2 frames of low voltage L alternating 28 times. The first non-equal-frame waveforms and the second non-equal-frame waveforms corresponding to red and black both have a structure of first low voltage L and then high voltage H. The first non-equal-frame waveforms are all (2L - 8H) × 13 times of alternation, and the second non-equal-frame waveforms are all (8H - 2L) × 7 times of alternation. The principle of having more high voltage frames than low voltage frames needs to be maintained during debugging. However, the red waveform has a black particle pushing structure with positive oscillation waveforms more than the black waveform, which is 2 frames of GND connected to 2 frames of high voltage H alternating 10 times. Among them, the number of alternations can be adjusted according to requirements. The first non-equal-frame waveforms and the second non-equal-frame waveforms of white and yellow both have a structure of first high voltage H and then low voltage L, and the first non-equal-frame waveforms are all (8H - 2L) × 7 times of alternation, and the second non-equal-frame waveforms are all (2H - 8L) × 13 times of alternation. The principle of having more low voltage frames than high voltage frames needs to be maintained during debugging.

[0111] In this way, by setting the first equal-frame waveform and the second equal-frame waveform with different durations of voltage application each time, the oscillation separation of charged particles can be achieved, thereby achieving the target display effect.

[0112] The embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the steps of the method in any of the above embodiments are implemented.

[0113] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0114] In addition, the term "connection" should be understood in a broad sense. For example, it may include fixed connection, detachable connection, or integral connection; it may include direct connection, indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to specific circumstances.

[0115] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0116] Any process or method description shown in a flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. And the scope of the preferred embodiments of this application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of this application belong.

[0117] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A display control method for an electronic paper device, characterized in that: The display control method comprises: When the electronic paper device is in a preset display stage, determining an oscillation waveform of the target pixel according to a previous display color of the target pixel; According to the oscillation waveform, a driving voltage is applied to the target pixel to drive the charged particles in the target pixel to move, so that the target pixel achieves a target display effect.

2. The display control method according to claim 1, characterized in that: The step of determining the oscillation waveform of the target pixel according to the last displayed color of the target pixel comprises: In a case where the last displayed color of the target pixel is the first color, determining that the oscillation waveform is a first oscillation waveform; When the last displayed color of the target pixel is the second color, the oscillation waveform is determined to be the second oscillation waveform, the brightness of the first color is greater than the brightness of the second color, and the first voltage duration in the first oscillation waveform is less than the first voltage duration in the second oscillation waveform.

3. The display control method according to claim 2, characterized in that: The first oscillation waveform includes a first non-equiframe wave and a second non-equiframe wave in sequence, and the first non-equiframe wave and the second non-equiframe wave both include a first voltage and a second voltage applied alternately.

4. The display control method according to claim 3, characterized in that: In one alternation, the sum of the duration of applying the first voltage and the duration of applying the second voltage is a first preset time, in the first non-equal frame wave, the duration of each application of the first voltage is greater than the duration of each application of the first voltage in the second non-equal frame wave, and the number of alternations between the second voltage and the first voltage in the first non-equal frame wave is less than the number of alternations in the second non-equal frame wave.

5. The display control method according to claim 2, characterized in that: The second oscillation waveform includes a third non-equiframe wave and a fourth non-equiframe wave in sequence, and the third non-equiframe wave and the fourth non-equiframe wave both include a second voltage and a first voltage that are applied alternately.

6. The display control method according to claim 5, characterized in that: In one alternation, the sum of the duration of applying the first voltage and the duration of applying the second voltage is a second preset time, in the third non-equal frame wave, the duration of each application of the first voltage is greater than the duration of each application of the first voltage in the fourth non-equal frame wave, and the number of alternations between the second voltage and the first voltage in the third non-equal frame wave is greater than the number of alternations in the fourth non-equal frame wave.

7. The display control method according to claim 2, characterized in that: The charged particles of the target pixel include first particles and second particles, the driving voltage of the first particles is the second voltage, and the driving voltage of the second particles is the first voltage.

8. The display control method according to claim 2, characterized in that: The second oscillation waveform includes a first oscillation sub-waveform and a second oscillation sub-waveform, and when the last displayed color of the target pixel is the second color, determining that the oscillation waveform is the second oscillation waveform includes: In a case where the last displayed color of the target pixel is the first sub-color, determining the oscillation waveform to be the first oscillation sub-waveform; When the previous display color of the target pixel is the second sub-color, the oscillation waveform is determined to be the second oscillation sub-waveform, the brightness of the first sub-color is greater than the brightness of the second sub-color, and the first voltage duration in the first oscillation sub-waveform is greater than the first voltage duration in the second oscillation sub-waveform.

9. The display control method according to claim 8, characterized in that: The first oscillator waveform also includes a positive oscillation waveform, which includes the first voltage and the third voltage applied alternately, and the duration of each application of the first voltage is the same as the duration of each application of the third voltage, and the first voltage is greater than the third voltage.

10. The display control method according to claim 8, characterized in that: The charged particles include a first sub-particle and a second sub-particle, a driving voltage of the first sub-particle and the second sub-particle is a first voltage, and the driving voltage of the first sub-particle is lower than the driving voltage of the second sub-particle.

11. The display control method according to claim 1, characterized in that: The oscillation waveform includes a first frame waveform and a second frame waveform. In the first frame waveform, a first voltage lasting for a third preset time and a second voltage lasting for the third preset time are applied alternately. In the second frame waveform, a first voltage lasting for a fourth preset time and a second voltage lasting for the fourth preset time are applied alternately, and the third preset time is greater than the fourth preset time.

12. An electronic paper device, characterized in that: The electronic device includes one or more processors and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 11 are implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented.

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