Tristimulus electronic paper driving method and system

Abstract

In the three-color electronic paper driving system, the MPU module includes a room temperature display module and a high temperature display module. When the ambient temperature is greater than 10 degrees Celsius and less than 40 degrees Celsius, the room temperature display module is activated to display the graphic; when the ambient temperature is greater than 40 degrees Celsius and less than 60 degrees Celsius, the high temperature display module is activated to display the graphic. The high temperature display module includes a reference module and a display module. In the three-color electronic paper driving method, an electric field drives three-color particles, namely particles A, B, and C, to move. The driving process includes a reference stage and a display stage. In the reference stage, the reference module drives particle A to move for CA1 frames and drives particle B to move for CB1 frames, forming a base color for the mixed color of particles A and B. In the display stage, the display module drives particles A, B, and C to move according to the displayed graphic to display the graphic. Driving two types of particles to enter an active state first not only reduces the driving time in the display stage but also reduces the probability of blurry graphics caused by excessive particle movement in the display stage.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a three-color electronic paper driving method and system. Background Technology

[0002] Electronic paper is a display screen made using electrophoretic display technology. It achieves the effect of displaying images by driving the electronic paper particles through the continuous application of an electric field with a driving waveform to each pixel by a driving IC chip.

[0003] In the existing technology, two-color electronic paper encapsulates black and white charged particles in the same capsule structure, while three-color electronic paper encapsulates three charged particles of different colors, such as black, white and red or black, white and yellow, in the same microcup structure. The movement of black, white and red particles with different charges is controlled by an external electric field to display black, white and red colors or black, white and yellow display effects.

[0004] The external electric field of an EPD product consists of the electric field generated by the charging of the TFT capacitor and the electronic paper ITO. The driving time of the electric field is achieved by a set of waveform voltages. Currently, the display of EPD products relies on the driver IC chip of the electronic paper module to drive the particles within the electronic paper to achieve black-and-white red or black-and-white yellow display effects. The electronic paper driving waveform mainly consists of timing sequences composed of gate voltage, source voltage, VCOM voltage, and refresh frequency. During use, the ambient temperature range for black-and-white red EPDs is 0–40℃. Good display effects are easier to achieve at room temperature.

[0005] The manufacturing process for three-color electronic paper modules is demanding, and consistency is difficult to control within a small deviation range. At high temperatures, due to increased activity of some particles and increased uncertainty in particle movement or jitter, some batches of black, white, and red electronic paper modules are prone to blurry text at 40°C. Current technology typically uses increased driving timing frequency to make the text clearer; however, the effect is not ideal and it also increases current, leading to higher power consumption. While this improves the display effect, it also increases the product's power consumption, which is detrimental to environmental protection.

[0006] Definitions:

[0007] EPD is an abbreviation for "electronic paper display".

[0008] ESL is an abbreviation for "Electronic Shelf Label".

[0009] TFT is an abbreviation for "Thin Film Transistor". In this application, it means that each pixel on the display is driven by a thin film transistor integrated behind it, thereby enabling high-speed, high-brightness, and high-contrast display of screen information.

[0010] ITO is an abbreviation for "Indium Tin Oxide". In this application, electronic paper ITO refers to the transparent conductive film shielding glass whose conductive film layer material is mainly ITO (Indium Tin Oxide Semiconductor) film. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to avoid the shortcomings of the prior art in which the increase of the driving signal frequency of the three-color electronic paper module at high temperature cannot solve the problem of blurry graphic display, and to provide a three-color electronic paper driving method and system suitable for high temperature.

[0012] The technical solution of this application to solve the above-mentioned technical problems is a three-color electronic paper driving method, which uses an electric field to drive the movement of three-color particles to realize screen clearing and display functions. The three-color particles are particle A, particle B, and particle C. The driving includes: a reference stage and a display stage; in the reference stage, particle A is driven to move CA1 frames and particle B is driven to move CB1 frames to form a reference background color for the mixed color of particle A and particle B; in the display stage, according to the display graphic, particle A, particle B, and particle C are driven to move to display the graphic.

[0013] The reference phase is preceded by a screen clearing phase; the screen clearing phase is used to erase the old screen and perform electrical balancing.

[0014] The screen clearing phase includes screen clearing phase 1 and screen clearing phase 2; screen clearing phase 1 outputs the screen clearing phase 1 waveform; screen clearing phase 2 outputs the screen clearing phase 2 waveform.

[0015] Between the screen clearing phase and the reference phase, there is also a blinking phase; the blinking phase activates charged particles and disperses the three-color particles.

[0016] The flickering phase includes flickering phase 1 and flickering phase 2. In flickering phase 1, the image is driven by high voltage for at least 5 frames, driving the image closer to black, and then driven by negative voltage for at least 6 frames, driving the image closer to white. In flickering phase 2, the image is driven by negative voltage for at least 5 frames, driving the image closer to white, and then driven by high voltage for at least 4 frames, driving the image closer to black. Flickering phase 1 and flickering phase 2 are executed more than twice.

[0017] During the reference phase, in the CA1 frame, the CA1 value is greater than 15 and less than 25; in the CB1 frame, the CB1 value is greater than 15 and less than 25.

[0018] The display phase includes display phase 1, display phase 2, and display phase 3. In display phase 1, particles A and B are driven to display graphics based on the displayed graphics. In display phase 2, particles A, B, and C are driven to display graphics based on the displayed graphics. In display phase 3, particles A, B, and C are driven to display graphics based on the displayed graphics. Display phase 1, display phase 2, and display phase 3 are executed more than twice.

[0019] The three-color electronic paper driving method includes any one of the following features: Feature T1: The frequency of the electric field driving waveform is greater than 70Hz and less than 80Hz; Particle A is a black particle with a driving voltage greater than 13V and less than 15V; Particle B is a white particle with a driving voltage greater than -15V and less than -13V; Particle C is a yellow particle with a driving voltage greater than 7V and less than 8V; VCOM voltage is greater than -2.2V and less than -1.8V; Feature T2: The frequency of the electric field driving waveform is greater than 70Hz and less than 80Hz; Particle A is a black particle with a driving voltage greater than 13V and less than 15V; Particle B is a white particle with a driving voltage greater than -15V and less than -13V; Particle C is a red particle with a driving voltage greater than 7V and less than 8V; VCOM voltage is greater than -2.2V and less than -1.8V.

[0020] The technical solution to solve the above-mentioned technical problems in this application can also be a three-color electronic paper driving system, including a three-color electronic paper module, a driving module, an MPU module, and a temperature sensing module; the temperature sensing module is electrically connected to the MPU module, and the MPU module obtains ambient temperature information through the temperature sensing module; the three-color electronic paper module is electrically connected to the driving module; the driving module is electrically connected to the MPU module, and the MPU module drives the three-color electronic paper module to display information through the driving module; the MPU module includes a room temperature display module and a high temperature display module; when the MPU module obtains an ambient temperature greater than 10 degrees and less than 40 degrees, it starts the room temperature display module to display graphics; when the MPU module obtains an ambient temperature greater than 40 degrees and less than 60 degrees, it starts the high temperature display module to display graphics; the high temperature display module includes a reference module and a display module; when displaying graphics, the reference module first drives particle A to move CA1 frames and drives particle B to move CB1 frames; forming a base background color for the mixed color of particle A and particle B; after the reference module forms the base background color, the display module drives particle A, particle B, and particle C to move according to the display graphics to display the graphics.

[0021] The high-temperature display module also includes a screen clearing module and a flashing module. When displaying graphics, the screen clearing module first clears the original display image, erasing the old screen and electrical balance. After clearing the original display image, the flashing module activates the charged particles, distributing the three-color particles. It includes any one of the following features: Feature TT1: The MPU module output drive waveform frequency is greater than 70Hz and less than 80Hz; the three-color electronic paper module includes black particles, and the drive module output drive voltage is greater than 13V and less than 15V; the three-color electronic paper module includes white particles, and the drive module output drive voltage is greater than -15V and less than -13V; the three-color electronic paper module includes yellow particles, and the drive module output... The driving voltage is greater than 7V and less than 8V; the driving module output driving VCOM voltage is greater than -2.2V and less than -1.8V; feature TT2: the MPU module driving waveform frequency is greater than 70Hz and less than 80Hz; for the three-color electronic paper module including black particles, the driving module output driving voltage is greater than 13V and less than 15V; for the three-color electronic paper module including white particles, the driving module output driving voltage is greater than -15V and less than -13V; for the three-color electronic paper module including red particles, the driving module output driving voltage is greater than 7V and less than 8V; the driving module output driving VCOM voltage is greater than -2.2V and less than -1.8V.

[0022] One of the beneficial effects of the technical solution in this application is that by first using the mixed color of the two particles as a base image, the image can be driven to form a neutral base color. Based on this base color, during the display stage, not only can other colors be quickly driven to form, but also by first creating the base color, the two particles can be driven into an active state. This not only reduces the driving time during the display stage but also reduces the probability of blurry graphics caused by excessive particle movement during the display stage. The problem of blurry graphics display at high temperatures can also be solved under conventional frequency driving signals, without needing to increase the frequency of the electric field driving signal at high temperatures. Although the method in this application consumes more power under the same frequency driving signal, it is still more energy-efficient than increasing the driving signal frequency.

[0023] One of the beneficial effects of the technical solution in this application is that the old image can be erased during the screen clearing stage. In the high-temperature stage, strengthening the screen clearing operation can better eliminate ghosting and reduce the probability of blurry graphics display.

[0024] One of the beneficial effects of the technical solution in this application is that, in the reference stage, the mixed color of the two particles is used as the base map, which can drive the screen to form a neutral base color first; on the basis of the base color, in the display stage, other colors can be quickly driven to form.

[0025] The second beneficial effect of the technical solution in this application is that by first creating a base color, the two types of particles can be driven into an active state first, reducing the driving time during the display stage.

[0026] The third beneficial effect of the technical solution in this application is that by first creating a base color, the probability of blurry graphics caused by excessive particle movement during the display stage is reduced.

[0027] The fourth beneficial effect of the technical solution in this application is that, during the flashing stage, charged particles can be activated, allowing them to preheat and run. Subsequent motion control requires less time and it is easier to control the particle motion to the appropriate degree, reducing the probability of blurring of the image caused by excessive particle motion.

[0028] The fifth beneficial effect of the technical solution in this application is that, during the flashing stage, multiple executions can cause the clustered particles to vibrate and disperse fully, resulting in less time required for subsequent motion control and making it easier to control the particle motion to the appropriate degree, thereby reducing the probability of blurring of the image due to excessive particle motion.

[0029] The sixth beneficial effect of the technical solution in this application is that, in the reference stage, particle A is driven to move for CA1 frames, and particle B is driven to move for CB1 frames. The number of CA1 frames is greater than 15 and less than 25; the number of CB1 frames is greater than 15 and less than 25. This number of times is suitable, and it will just put both particle A and particle B in a relatively suitable state, which can provide a suitable basic state for clear display in the display stage.

[0030] The seventh beneficial effect of the technical solution in this application is that, during the display stage, multiple executions allow scattered particles to cluster according to the graphic. Executing the display program multiple times can fix active particles in the display position when the temperature is high, and the higher the temperature, the more times it can be executed. Multiple executions during the display stage strengthen the particle position control in the graphic display state, ensuring that the graphic can be displayed stably and further reducing the probability of graphic blurring caused by excessive particle movement.

[0031] The eighth beneficial effect of the technical solution in this application is that, with the temperature sensing module, different program modules can be called according to the temperature value. The high temperature module requires more execution time and consumes more power. Although the method in this application can also display a normal image at normal temperature, the power consumption is relatively large compared to the normal temperature state. Being able to distinguish the temperature and execute different control programs or control parameters can reduce power consumption, while ensuring that a clear image can be displayed at high temperature. Attached Figure Description

[0032] Figure 1 This is one of the timing diagrams for the driving voltage of the three-color electronic paper;

[0033] Figure 2 This is the second timing diagram of the driving voltage for the three-color electronic paper;

[0034] Figure 3This is the third timing diagram of the driving voltage for the three-color electronic paper;

[0035] Figure 4 This is the fourth timing diagram of the driving voltage for the three-color electronic paper;

[0036] Figure 5 This is the fifth timing diagram of the driving voltage for the three-color electronic paper;

[0037] Figure 6 This is one of the system block diagrams of an embodiment of a three-color electronic paper driving system;

[0038] Figure 7 This is the second system block diagram of an embodiment of a three-color electronic paper driving system;

[0039] Figure 8 This is the third system block diagram of an embodiment of the three-color electronic paper driving system;

[0040] Figure 9 This is the fourth system block diagram of an embodiment of a three-color electronic paper driving system. Detailed Implementation

[0041] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] It should be noted that the following description of preferred embodiments of this application does not constitute any limitation on this application. The description of preferred embodiments is merely an illustration of the general principles of this application. The embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and technical features numbered with Arabic numerals 1, 2, 3, etc., and designations such as "A" and "B," are used for descriptive purposes only, for the sake of convenience of explanation, and do not represent a temporal or spatial order; they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first," "second," and numbered with Arabic numerals 1, 2, 3, etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "several" means two or more, unless otherwise expressly and specifically defined.

[0044] like Figures 1 to 5 In one embodiment of a three-color electronic paper driving method, an electric field drives the movement of three-color particles to achieve screen clearing and display functions. The three-color particles are particle A, particle B, and particle C. The driving process includes a reference stage and a display stage. In the reference stage, particle A is driven to move for CA1 frames, and particle B is driven to move for CB1 frames, forming a base color for the mixed color of particle A and particle B. In the display stage, according to the display graphic, particle A, particle B, and particle C are driven to move to display the graphic. In the reference stage, the CA1 value in the CA1 frame is greater than 15 and less than 25; in the CB1 frame, the CB1 value is greater than 15 and less than 25. Figure 3 The image shows the driving signal waveforms of the three particles during the reference phase. Figure 3 The number of CA1 frames is equal to the product of the duration of the driving waveform and the frequency of the main driving control signal; that is, the number of frames is the number of cycles of the main driving control signal within the duration of the driving waveform. The number of A-particle driving frames = TA / TCLK, where TA is the duration of the A-particle driving waveform and TCLK is the cycle of the main driving control signal. The number of B-particle driving frames = TB / TCLK, where TB is the duration of the B-particle driving waveform and TCLK is the cycle of the main driving control signal.

[0045] In the reference phase, a base image is created using the mixed color of the two particles, driving the image to form a neutral base color. Based on this base color, in the display phase, not only can other colors be quickly generated, but the initial base color also allows both particles to enter an active state. This reduces the driving time in the display phase and decreases the probability of blurry graphics caused by excessive particle movement. For example, suppose particle A needs 100 frames to fully move and particle B needs 120 frames. Particle A moves for 50 frames, reaching 50% of its position; similarly, particle B moves for 60 frames, reaching 50% of its position. When displaying the graphic, some particles of particle A continue moving, while others return, but all particles of particle A move approximately 50% of their distance. Similarly, particle B also moves for some frames, but all particles of particle B move approximately 50% of their distance, reducing the probability of particle C moving and mitigating the blurring caused by excessive particle movement. The problem of blurry graphics display at high temperatures can be solved even with a conventional frequency drive signal. There is no need to increase the frequency of the electric field drive signal at high temperatures. Although the method of this application will consume slightly more power under the same frequency drive signal, it will still save more energy compared to increasing the frequency of the drive signal.

[0046] like Figures 1 to 5 In one embodiment of a three-color electronic paper driving method, a screen clearing stage is included before the reference stage; the screen clearing stage is for erasing old images and electrical balance. The screen clearing stage can erase old images, and in the high-temperature stage, strengthening the screen clearing operation can better eliminate afterimages.

[0047] like Figures 1 to 5 In one embodiment of a three-color electronic paper driving method, the screen clearing stage includes screen clearing stage 1 and screen clearing stage 2; screen clearing stage 1 outputs the screen clearing stage 1 waveform; screen clearing stage 2 outputs the screen clearing stage 2 waveform. Figure 1 The image shows the driving signal waveforms of the three types of particles in screen clearing stage 1 and screen clearing stage 2.

[0048] like Figures 1 to 5 In one embodiment of a three-color electronic paper driving method, a flickering stage is further included between the screen clearing stage and the reference stage; the flickering stage activates charged particles, distributing the three-color particles. The flickering stage can activate charged particles, allowing them to preheat and operate.

[0049] like Figures 1 to 5In one embodiment of a three-color electronic paper driving method, the flickering stage includes flickering stage 1 and flickering stage 2. In flickering stage 1, a high voltage is first used to drive the image for at least 5 frames, driving it closer to black, and then a negative voltage is used to drive the image for at least 6 frames, driving it closer to white. In flickering stage 2, a negative voltage is first used to drive the image for at least 5 frames, driving it closer to white, and then a high voltage is used to drive the image for at least 4 frames, driving it closer to black. Flickering stage 1 and flickering stage 2 are executed more than twice. Executing the flickering stage multiple times allows clustered particles to vibrate and disperse. Figure 2 The image shows the driving signal waveforms of the three types of particles in scintillation stage 1 and scintillation stage 2.

[0050] like Figures 1 to 4 In one embodiment of a three-color electronic paper driving method, the display stage includes display stage 1, display stage 2, and display stage 3; in display stage 1, particles A and B are driven to display a graphic according to the display graphic; in display stage 2, particles A, B, and C are driven to display a graphic according to the display graphic; in display stage 3, particles A, B, and C are driven to display a graphic according to the display graphic; display stage 1, display stage 2, and display stage 3 are executed more than twice. Figure 4 The image shows the driving signal waveforms of the three types of particles in display phase 1, display phase 2, and display phase 3.

[0051] During the display phase, multiple executions allow scattered particles to cluster according to the graphic. Executing the display program multiple times can fix active particles in the display position even at high temperatures; the higher the temperature, the more times it can be executed.

[0052] like Figures 1 to 4 In one embodiment of a three-color electronic paper driving method, feature T1 is included: the driving waveform frequency of the electric field is greater than 70Hz and less than 80Hz; particle A is a black particle with a driving voltage greater than 13V and less than 15V; particle B is a white particle with a driving voltage greater than -15V and less than -13V; particle C is a yellow particle with a driving voltage greater than 7V and less than 8V; and the VCOM voltage is greater than -2.2V and less than -1.8V.

[0053] like Figures 1 to 4 In one embodiment of a three-color electronic paper driving method, feature T2 is included: the driving waveform frequency of the electric field is greater than 70Hz and less than 80Hz; particle A is a black particle with a driving voltage greater than 13V and less than 15V; particle B is a white particle with a driving voltage greater than -15V and less than -13V; particle C is a red particle with a driving voltage greater than 7V and less than 8V; and the VCOM voltage is greater than -2.2V and less than -1.8V.

[0054] like Figure 5The diagram illustrates a driving timing sequence for a high-temperature display. First, in the voltage balance zone, a screen clearing operation is performed on white particles during the F1 period, which can be cycled a times; the number of cycles can be set according to actual needs. The jitter zone, or flickering stage, includes flickering stage 1 and flickering stage 2; flickering stage 1 can cycle b times during the F2 period, and flickering stage 2 can cycle c times during the F3 period. The display zone includes display stage 1 and display stage 2. In display stage 1, particles of the corresponding color are driven during the F5 period, and particles of another corresponding color are driven during the F4 period; in display stage 2, particles of the corresponding color are driven during the F7 period, and particles of another corresponding color are driven during the F6 period; the driving waveform of display stage 1 can cycle d times, and the driving waveform of display stage 2 can cycle e times.

[0055] In some embodiments not shown in the accompanying drawings, the display area includes display stage 1, display stage 2, and display stage. In other embodiments not shown in the accompanying drawings, it includes a screen clearing area or voltage balance area (i.e., screen clearing stage), a flickering area or jittering area (i.e., flickering stage), a reference area (i.e., reference stage), and a display area (i.e., display stage); after the driving waveform of each stage reaches the minimum limit requirement, the number of cycles can be adjusted appropriately according to the actual temperature.

[0056] like Figures 6 to 9 In one embodiment of a three-color electronic paper driving system, the system includes a three-color electronic paper module, a driving module, an MPU module, and a temperature sensing module. The temperature sensing module is electrically connected to the MPU module, and the MPU module obtains ambient temperature information through the temperature sensing module. The three-color electronic paper module is electrically connected to the driving module. The driving module is electrically connected to the MPU module, and the MPU module drives the three-color electronic paper module to display information through the driving module. The MPU module includes a room temperature display module and a high temperature display module. When the MPU module obtains an ambient temperature greater than 10 degrees Celsius and less than 40 degrees Celsius, it activates the room temperature display module to display graphics. When the MPU module obtains an ambient temperature greater than 40 degrees Celsius and less than 60 degrees Celsius, it activates the high temperature display module to display graphics. The high temperature display module includes a reference module and a display module. When displaying graphics, the reference module first drives particle A to move for CA1 frames and drives particle B to move for CB1 frames, forming a base background color for the mixed color of particle A and particle B. After the reference module forms the base background color, the display module drives particle A, particle B, and particle C to move according to the display graphics to display the graphics.

[0057] First, a base image is created using the mixed color of two particles. This drives the image to form a neutral base color. Based on this base color, other colors can be quickly generated during the display phase. Creating a base color first allows the particles to enter an active state, reducing the driving time during the display phase. With a temperature sensor, different program modules can be called based on the temperature value. The high-temperature module requires more execution time and consumes more power. Although it can display normal images at normal temperatures, it consumes a lot of power. Being able to distinguish temperatures and execute different control programs or control parameters can reduce power consumption while ensuring a clear image is displayed at high temperatures.

[0058] like Figures 6 to 9 In one embodiment of a three-color electronic paper driving system, the high-temperature display module further includes a screen clearing module and a flashing module. When displaying graphics, the screen clearing module first clears the original display image, erasing the old screen and electrical balance. After clearing the original display image, the flashing module activates the charged particles and disperses the three-color particles. Features TT1 include: the MPU module outputs a driving waveform frequency greater than 70Hz and less than 80Hz; the three-color electronic paper module includes black particles, and the driving module outputs a driving voltage greater than 13V and less than 15V; the three-color electronic paper module includes white particles, and the driving module outputs a driving voltage greater than -15V and less than -13V; the three-color electronic paper module includes yellow particles, and the driving module outputs a driving voltage greater than 7V and less than 8V; the driving module outputs a driving VCOM voltage greater than -2.2V and less than -1.8V.

[0059] like Figures 6 to 9 In one embodiment of a three-color electronic paper driving system, feature TT2 is included: the MPU module driving waveform frequency is greater than 70Hz and less than 80Hz; the three-color electronic paper module includes black particles, and the driving module output driving voltage is greater than 13V and less than 15V; the three-color electronic paper module includes white particles, and the driving module output driving voltage is greater than -15V and less than -13V; the three-color electronic paper module includes red particles, and the driving module output driving voltage is greater than 7V and less than 8V; the driving module output driving VCOM voltage is greater than -2.2V and less than -1.8V.

[0060] In existing technologies, the state diagram of a three-color electronic paper display at temperatures above 40 degrees Celsius is noticeably blurry. The state diagram of a three-color electronic paper display at temperatures above 40 degrees Celsius, driven by the method and system of this application, is significantly clearer than that of existing technologies.

[0061] In the three-color electronic paper driving system, the MPU module includes a room temperature display module and a high temperature display module. When the ambient temperature is greater than 10 degrees Celsius and less than 40 degrees Celsius, the room temperature display module is activated to display the graphic; when the ambient temperature is greater than 40 degrees Celsius and less than 60 degrees Celsius, the high temperature display module is activated to display the graphic. The high temperature display module includes a reference module and a display module. In the three-color electronic paper driving method, an electric field is used to drive the three-color particles, namely particle A, particle B, and particle C, to move. The driving process includes a reference stage and a display stage. In the reference stage, the reference module drives particle A to move for CA1 frames and drives particle B to move for CB1 frames, forming a base color for the mixed color of particle A and particle B. In the display stage, the display module drives particle A, particle B, and particle C to move according to the display graphic to display the graphic.

[0062] like Figures 1 to 9 As shown, the above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A three-color electronic paper driving method, characterized in that: The screen clearing and display functions are achieved by driving the movement of three-color particles, namely particle A, particle B, and particle C, using an electric field. The driving process includes a reference stage and a display stage. During the reference phase, drive particle A to move for CA1 frames and drive particle B to move for CB1 frames; thus forming the base color for the mixed color of particle A and particle B. During the display phase, based on the displayed graphic, the movement of particles A, B, and C is driven to display the graphic. The reference stage is preceded by a screen clearing stage; the screen clearing stage is used to erase the old screen and perform power balancing. The screen clearing phase and the reference phase also include a flickering phase; The blinking phase activates charged particles, dispersing the three-color particles. The blinking phase includes blinking phase 1 and blinking phase 2; In the first flickering phase, a high voltage is used to drive at least 5 frames, driving the image closer to black, and then a negative voltage is used to drive at least 6 frames, driving the image closer to white. In the second flickering phase, a negative voltage is first used to drive at least 5 frames, driving the image closer to white, and then a high voltage is used to drive at least 4 frames, driving the image closer to black. Flashing phase 1 and flashing phase 2 are executed more than twice; During the reference phase, in the CA1 frame, the CA1 value is greater than 15 and less than 25; in the CB1 frame, the CB1 value is greater than 15 and less than 25. The display phase includes display phase 1, display phase 2, and display phase 3; In display phase 1, based on the displayed graphic, particle A and particle B are driven to display the graphic. In display phase 2, based on the displayed graphics, particles A, B, and C are driven to display graphics. In display phase 3, based on the displayed graphic, particles A, B, and C are driven to display the graphic. Display phase 1, display phase 2, and display phase 3 are executed more than twice.

2. The three-color electronic paper driving method according to claim 1, characterized in that, The screen clearing phase includes screen clearing phase 1 and screen clearing phase 2.

3. The three-color electronic paper driving method according to claim 1, characterized in that, Includes any one of the following features: Characteristic T1: The frequency of the electric field driving waveform is greater than 70Hz and less than 80Hz; Particle A is a black particle with a driving voltage greater than 13V and less than 15V; Particle B is a white particle, and its driving voltage is greater than -15V and less than -13V. Particle C is a yellow particle, and its driving voltage is greater than 7V and less than 8V. The VCOM voltage should be greater than -2.2V and less than -1.8V. Characteristic T2: The frequency of the driving waveform of the electric field is greater than 70Hz and less than 80Hz; Particle A is a black particle with a driving voltage greater than 13V and less than 15V; Particle B is a white particle, and its driving voltage is greater than -15V and less than -13V. Particle C is a red particle with a driving voltage greater than 7V and less than 8V; The VCOM voltage should be greater than -2.2V and less than -1.8V.

4. A three-color electronic paper driving system, characterized in that, It includes a three-color electronic paper module, a driver module, an MPU module, and a temperature sensing module; The temperature sensing module is electrically connected to the MPU module, and the MPU module obtains ambient temperature information through the temperature sensing module. The three-color electronic paper module is electrically connected to the drive module; The driver module is electrically connected to the MPU module, and the MPU module drives the three-color electronic paper module to display information through the driver module. The MPU module includes a normal temperature display module and a high temperature display module; when the MPU module obtains an ambient temperature greater than 10 degrees and less than 40 degrees, it activates the normal temperature display module to display graphics. When the MPU module detects an ambient temperature greater than 40 degrees Celsius but less than 60 degrees Celsius, it activates the high-temperature display module to display a graphic. The high-temperature display module includes a reference module and a display module; When displaying graphics, the reference module first drives particle A to move for CA1 frames and then drives particle B to move for CB1 frames; thus forming the base background color for the mixed color of particle A and particle B. After the reference module forms the base color, the display module drives the movement of particles A, B, and C according to the display graphic to display the graphic. The drive system is driven by the method described in any one of claims 1 to 3.

5. The three-color electronic paper driving system according to claim 4, characterized in that, The high-temperature display module also includes a screen clearing module and a blinking module; When displaying graphics, the screen clearing module first clears the original display image, erases the old screen and power balance; After clearing the original displayed image, the blinking module activates the charged particles, distributing the three-color particles. Includes any one of the following features: Feature TT1: The output drive waveform frequency of the MPU module is greater than 70Hz and less than 80Hz; The three-color electronic paper module includes black particles, and the driving module outputs a driving voltage greater than 13V and less than 15V. The three-color electronic paper module includes white particles, and the driving module outputs a driving voltage greater than -15V and less than -13V. The three-color electronic paper module includes yellow particles, and the driving module outputs a driving voltage greater than 7V and less than 8V. The driver module outputs a drive VCOM voltage greater than -2.2V and less than -1.8V. Feature TT2: The MPU module drive waveform frequency is greater than 70Hz and less than 80Hz; The three-color electronic paper module includes black particles, and the driving module outputs a driving voltage greater than 13V and less than 15V. The three-color electronic paper module includes white particles, and the driving module outputs a driving voltage greater than -15V and less than -13V. The three-color electronic paper module includes red particles, and the driving module outputs a driving voltage greater than 7V and less than 8V. The output voltage of the driver module, VCOM, should be greater than -2.2V and less than -1.8V.

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