CN113450729A - Driving method and system of three-color flexible electronic paper - Google Patents
Driving method and system of three-color flexible electronic paper Download PDFInfo
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- CN113450729A CN113450729A CN202110797200.4A CN202110797200A CN113450729A CN 113450729 A CN113450729 A CN 113450729A CN 202110797200 A CN202110797200 A CN 202110797200A CN 113450729 A CN113450729 A CN 113450729A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1685—Operation of cells; Circuit arrangements affecting the entire cell
Abstract
The invention provides a driving method and a system of three-color flexible electronic paper, wherein reference voltage and red charged particle driving voltage of the electronic paper are set according to sample data of a plurality of pieces of electronic paper, and corresponding white charged particles and black charged particle driving voltage are set according to the red charged particle driving voltage; respectively constructing multiple groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles; controlling the magnitude and the direction of electric fields at two ends of corresponding pixels according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial positions of corresponding charged particles before displaying a specified picture, and moving the charged particles to be displayed close to the display surface of the electronic paper to a non-display surface; the invention can effectively improve the display effect of the electronic paper.
Description
Technical Field
The invention relates to the technical field of flexible electronic paper driving and displaying, in particular to a driving method and system of three-color flexible electronic paper.
Background
Along with the rapid development of various fields of smart business surpassing, smart traveling, smart medical treatment and smart military industry, the ecology of the internet of things is continuously perfected, low-power-consumption display products such as electronic price tags, electronic table boards, electronic doorplates, electronic bus stop boards, electronic bedside cards, electronic chest cards, electronic infusion cards and the like are rapidly popularized and widely applied in China, and meanwhile, for the purpose of greatly expanding the use scenes such as intelligent wearing, the low-power-consumption products of flexible electronic paper are laid out and designed.
The low-consumption products are mainly electronic paper, but the electronic paper is limited by the materials of the electronic ink at present, the products are easy to have residual images in the using process, a plurality of using scenes are limited, the service life is short, and new challenges and requirements are provided for the durability and the optimization direction of driving waveforms.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a driving method and a system for three-color flexible electronic paper, which mainly solve the problems of optimal display effect and durability verification of the flexible electronic paper in different application scenes.
In order to achieve the above and other objects, the present invention adopts the following technical solutions.
A method of driving a three-color flexible electronic paper, the electronic paper comprising a plurality of pixels, at least one pixel comprising: black charged particles, white charged particles, and red charged particles;
setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of the electronic paper, and setting a corresponding white charged particle driving voltage and a corresponding black charged particle driving voltage according to the red charged particle driving voltage;
respectively constructing multiple groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles;
and controlling the magnitude and the direction of the electric field at two ends of the corresponding pixel according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial position of the corresponding charged particles before displaying the appointed picture, and moving the charged particles to be displayed close to the display surface of the electronic paper to a non-display surface.
Optionally, the setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of a plurality of the electronic papers, and setting a corresponding white charged particle and black charged particle driving voltage according to the red charged particle driving voltage, includes:
selecting a specified number of electronic paper samples, reading the initial reference voltage of each electronic paper sample, and setting the reference voltage according to the average value of the obtained initial reference voltages;
and respectively measuring driving voltage curves of the red charged particles at a plurality of different environmental temperatures, and selecting the driving voltage corresponding to the maximum value of the red optical value in each driving voltage curve as the driving voltage of the red charged particles, wherein the red optical value comprises contrast or brightness.
Optionally, the sets of driving sub-signals of the black charged particles include: a black particle balance sub-signal, a black particle separation sub-signal, and a black particle imaging sub-signal; the driving phase corresponding to the black particle balance sub-signal is a first driving phase of the plurality of driving phases, and the black particle balance sub-signal is configured to make the position of the black charged particles be at an initial position, where the initial position is a position of the black charged particles when the black pixel to be displayed is not driven by the black charged particle driving voltage; the black particle imaging sub-signal is configured to drive the black charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the black pixel to be displayed displays black; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
Optionally, the sets of driving sub-signals of the white charged particles comprise: a white ion balance sub-signal, a white ion separation sub-signal, and a white ion imaging sub-signal; a driving phase corresponding to the white particle balance sub-signal is a first driving phase of the plurality of driving phases, the white balance sub-signal is configured to make the position of the white charged particles be at an initial position, wherein the initial position is the position of the white charged particles when the white pixel to be displayed is not driven by the white charged particle driving signal; the white particle imaging sub-signal is configured to drive the white charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the white pixel to be displayed displays white; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
Optionally, the sets of driving sub-signals of the red charged particles include: a red ion-balance sub-signal, a red ion-separation sub-signal, and a red ion-imaging sub-signal; the driving phase corresponding to the red particle balance sub-signal is a first driving phase of the plurality of driving phases, and the red particle balance sub-signal is configured to make the position of the red charged particle be at an initial position, where the initial position is the position of the red charged particle when the red pixel to be displayed is not driven by the red charged particle driving signal; the red particle imaging sub-signal is configured to drive the red charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the red pixel to be displayed displays red; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
Optionally, a driving parameter of each driving stage of each charged particle is set, and the driving parameter is adjusted according to the display data of the electronic paper, wherein the driving parameter includes: driving voltage duration, driving times and driving sub-signal frequency.
Optionally, the electronic paper display data includes contrast and afterimage data.
Optionally, the driving voltage curve is formed by drawing red optical values corresponding to different red voltages.
A drive system for three-color flexible electronic paper, comprising:
a flexible electronic paper comprising a plurality of pixels, at least one pixel comprising: black charged particles, white charged particles, and red charged particles;
the driving voltage setting module is used for setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of the electronic paper, and setting corresponding white charged particles and black charged particle driving voltages according to the red charged particle driving voltage;
the driving signal generating module is used for respectively constructing a plurality of groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles;
and the driving display module is used for controlling the magnitude and the direction of the electric field at the two ends of the corresponding pixel according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial position of the corresponding charged particles before displaying the appointed picture, and moving the charged particles to be displayed close to the display surface of the electronic paper to a non-display surface.
As described above, the driving system of the three-color flexible electronic paper of the present invention has the following advantages.
The display effect optimization of the black, white and red flexible electronic paper can be realized, and the application scene of the intelligent display electronic paper is expanded.
Drawings
Fig. 1 is a driving waveform diagram of a three-color flexible electronic paper according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of an electronic paper according to an embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The FPL in the conventional flexible electronic paper material is mainly displayed by an electrophoretic display technology, which has many advantages, such as low power consumption and bistable state, and is popular with consumers. However, the electrophoretic display technology has some disadvantages, such as different FPLs have different effects on different electronic paper arrangements, and display deviation occurs when the refresh time is too long or the application time is too long in a specific application scenario. Taking the example that the electronic paper display device can display a black picture, a white picture and a red picture, after the electronic paper display device is used for half a year, imaging deviation may occur in the electronic paper display device, and the imaging deviation is mainly represented by the problem that red and white pictures have high Delta values, so that the quality of the displayed electronic paper product is affected, and the service life is reduced. The inventors of the present disclosure have found that one of the causes of the above-mentioned problem of image-forming deviation is due to a decrease in particle activity and a non-uniform or insufficient driving force in some specific usage scenarios of the electronic paper display device.
Referring to fig. 1, to solve the above problems, the present invention provides a driving method of a three-color flexible electronic paper, where the electronic paper includes a plurality of pixels, and at least one pixel includes: black charged particles, white charged particles, and red charged particles;
setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of the electronic paper, and setting a corresponding white charged particle driving voltage and a corresponding black charged particle driving voltage according to the red charged particle driving voltage;
respectively constructing multiple groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles;
and controlling the magnitude and the direction of the electric field at two ends of the corresponding pixel according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial position of the corresponding charged particles before displaying the appointed picture, and moving the non-to-be-displayed charged particles close to the display surface of the electronic paper to the non-display surface.
Specifically, the black charged particles and the red charged particles have the same or substantially the same electric property, for example, 11V to 15V, and the charge amount of the black charged particles is larger than that of the red charged particles, for example, 4V to 7V.
In one embodiment, the setting a reference voltage and a red charged particle driving voltage of an electronic paper according to sample data of a plurality of electronic papers, and setting corresponding white charged particles and black charged particle driving voltages according to the red charged particle driving voltage includes:
selecting a specified number of electronic paper samples, reading the initial reference voltage of each electronic paper sample, and setting the reference voltage according to the average value of the obtained initial reference voltages;
and respectively measuring driving voltage curves of the red charged particles at a plurality of different environmental temperatures, and selecting the driving voltage corresponding to the maximum value of the red optical value in each driving voltage curve as the driving voltage of the red charged particles, wherein the red optical value comprises contrast or brightness.
Specifically, setting the reference voltage and the driving voltage includes the steps of:
s1, screening 10 pieces of the flexible electronic paper sample;
s2, reading the VCOM voltage value of the flexible electronic paper sample by using upper computer software;
s3, removing the maximum value and the minimum value, and calculating the average value as the drive waveform to debug the initial VCOM voltage;
s4 measuring the red voltage curve at low temperature (0 deg.C), room temperature (25 deg.C) and high temperature (40 deg.C), and screening out the red voltage value corresponding to the highest red optical value as the initial red voltage for driving waveform debugging.
In one embodiment, the sets of drive sub-signals for the charged black particles comprise: a black particle balance sub-signal, a black particle separation sub-signal, and a black particle imaging sub-signal; the driving phase corresponding to the black particle balance sub-signal is a first driving phase of the plurality of driving phases, and the black particle balance sub-signal is configured to make the position of the black charged particles be at an initial position, where the initial position is a position of the black charged particles when the black pixel to be displayed is not driven by the black charged particle driving voltage; the black particle imaging sub-signal is configured to drive the black charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the black pixel to be displayed displays black; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
In one embodiment, the sets of drive sub-signals for the white charged particles comprise: a white ion balance sub-signal, a white ion separation sub-signal, and a white ion imaging sub-signal; a driving phase corresponding to the white particle balance sub-signal is a first driving phase of the plurality of driving phases, the white balance sub-signal is configured to make the position of the white charged particles be at an initial position, wherein the initial position is the position of the white charged particles when the white pixel to be displayed is not driven by the white charged particle driving signal; the white particle imaging sub-signal is configured to drive the white charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the white pixel to be displayed displays white; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
In one embodiment, the sets of driving sub-signals of the red charged particles comprise: a red ion-balance sub-signal, a red ion-separation sub-signal, and a red ion-imaging sub-signal; the driving phase corresponding to the red particle balance sub-signal is a first driving phase of the plurality of driving phases, and the red particle balance sub-signal is configured to make the position of the red charged particle be at an initial position, where the initial position is the position of the red charged particle when the red pixel to be displayed is not driven by the red charged particle driving signal; the red particle imaging sub-signal is configured to drive the red charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the red pixel to be displayed displays red; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
In the flexible electronic paper drive waveform, there is a corresponding drive signal for each color of charged particles, which is configured to drive the charged particles of the respective color into motion to effect the display. For example, the black driving signal is configured to drive the black charged particles to move so that a pixel to be displayed black in the electronic paper displays black; the red driving signal is configured to drive the red charged particles to move so that a pixel to be displayed with red in the electronic paper displays red; the white driving signal is configured to drive the white charged particles to move so that a pixel to be displayed white in the electronic paper displays white. The target picture can be displayed by inputting corresponding driving signals to the pixels of the electronic paper including the target color to be displayed.
As shown in fig. 2, the electronic paper driving waveform may apply a voltage signal (may be referred to as a VCOM signal, i.e. a reference signal) to the second electrode layer in the electronic paper, and during a process of refreshing a picture displayed by the electronic paper, an electric field in a specific direction may be formed according to a voltage difference between the reference signal and the driving signal of each pixel, so as to drive charged particles in the pixels to move. The drive signal may be a black drive signal, a red color drive signal, or a third color drive signal, each drive signal having a corresponding voltage waveform. It can be understood that, in the case where the voltage waveform of the driving signal in a certain driving phase is a high-level waveform, for example, the voltage value of the high-level waveform is greater than the voltage value of the VCOM signal, so that a first electric field directed from the first electrode to the second electrode is formed in the pixel, the black particles and the red particles move toward the side close to the display surface of the electronic paper under the action of the first electric field, and the white particles move toward the side away from the display surface of the electronic paper under the action of the first electric field. When the voltage waveform of the drive signal in a certain drive phase is a low-level waveform, for example, the voltage value of the low-level waveform is smaller than the voltage value of the VCOM signal, so that a second electric field directed from the second electrode to the first electrode is formed in the pixel, the black particles and the red particles move toward the side away from the display surface of the electronic paper under the action of the second electric field, and the white particles move toward the side close to the display surface of the electronic paper under the action of the second electric field. When the voltage waveform of the data driving signal in a certain driving phase is the common voltage waveform, for example, the voltage value of the common voltage waveform is equal to the voltage value of the VCOM signal, so that no electric field exists in the pixel, and no black particles, red particles, or white particles move under the action of the electric field.
In an embodiment, a driving parameter of each driving stage of the charged particles of each color is set, and the driving parameter is adjusted according to the display data of the electronic paper, wherein the driving parameter includes: driving voltage duration, driving times and driving sub-signal frequency.
Flexible electronic paper has severer requirement to the display effect of display screen, and these consumer products need use the scene in the difference, and on this point, this design carries out pertinence improvement and optimization through drive waveform on current material, sets for drive sub-signal respectively, proposes a drive waveform of black and white red three-colour flexible electronic paper, specifically realizes as follows:
the black voltage was set to 15V, the white voltage to-15V, the red voltage to 5.6V, and the frequency to 100Hz, and included three driving waveforms of black, white, and red.
First, the black particle drive waveform includes a plurality of sub-signals corresponding to a plurality of drive stages, including 10 stages of drive signals, as shown in fig. 1. Wherein the first stage (stage1) is divided into 4 driving sub-signals, which are VCOM voltage signal, HIGH voltage signal, VCOM voltage signal, respectively, corresponding to driving time lengths of 32, 22, 41, 0, respectively, and corresponding to driving times of 2, for balancing to make the position of the black charged particle at the initial position; the second stage (stage2) is divided into 4 driving sub-signals, namely a HIGH voltage signal, a LOW voltage signal, a HIGH voltage signal and a LOW voltage signal, the corresponding driving time lengths are respectively 5, 6 and 6, the corresponding driving times are 5, and the purpose is to enable black, white and red particles to rapidly oscillate to separate the particles, so that the mutual interference among the particles before driving imaging is reduced; the third stage (stage3) is divided into 4 driving sub-signals, namely a HIGH voltage signal, a LOW voltage signal, a HIGH voltage signal and a LOW voltage signal, the corresponding driving time lengths are respectively 26, 28, 26 and 28, the corresponding driving frequency is 6, and the purpose is to make the black, white and red particles vibrate slowly to separate the particles and reduce the mutual interference among the particles before driving imaging; the fourth stage (stage4) is divided into 4 driving sub-signals, which are respectively a HIGH voltage signal, a LOW voltage signal, a VCOM voltage signal, and the corresponding driving durations are respectively 2, 3, 0, and 10, wherein the corresponding driving times of the HIGH voltage signal and the LOW voltage signal are 56, and the corresponding driving times of the VCOM voltage signal and the VCOM voltage signal are 5, so as to make the black, white, and red particles rapidly oscillate to separate them, and reduce the mutual interference among the particles before driving imaging; the fifth stage (stage5) is divided into 4 driving sub-signals, which are VCOM voltage signal, and HIGH voltage signal, corresponding to driving time lengths of 8, 0, 56, and 0, and corresponding to driving times of 8, for driving and imaging black particles; the sixth stage (stage6) is divided into 4 driving sub-signals, which are VCOM voltage signal, HIGH voltage signal, VCOM voltage signal, respectively, corresponding driving duration is 6, 0, corresponding driving frequency is 3, and the purpose is black particle driving imaging; the seventh stage (stage7) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time length of 4, 0, 32, 0, corresponding to driving frequency of 3, and the stage is not used temporarily; the eighth stage (stage8) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, 10, corresponding to driving frequency of 2, and the stage is not used temporarily; the ninth stage (stage9) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, corresponding to driving frequency of 0, and the stage is not used temporarily; the tenth stage (stage10) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, respectively, corresponding to driving frequency of 0, and is not used for the moment.
Next, the white particle driving waveform includes a plurality of sub-signals corresponding to a plurality of driving stages, and as shown in fig. 1, includes 10 stages of driving signals. Wherein the first stage (stage1) is divided into 4 driving sub-signals, which are respectively a HIGH voltage signal, a VCOM voltage signal, a HIGH voltage signal, and a VCOM voltage signal, the corresponding driving durations are respectively 32, 22, 41, and 0, and the corresponding driving times are 2, so as to balance the positions of the white charged particles to initial positions; the second stage (stage2) is divided into 4 driving sub-signals, namely a HIGH voltage signal, a LOW voltage signal, a HIGH voltage signal and a LOW voltage signal, the corresponding driving time lengths are respectively 5, 6 and 6, the corresponding driving times are 5, and the purpose is to enable black, white and red particles to rapidly oscillate to separate the particles, so that the mutual interference among the particles before driving imaging is reduced; the third stage (stage3) is divided into 4 driving sub-signals, namely a HIGH voltage signal, a LOW voltage signal, a HIGH voltage signal and a LOW voltage signal, the corresponding driving time lengths are respectively 26, 28, 26 and 28, the corresponding driving frequency is 6, and the purpose is to make the black, white and red particles vibrate slowly to separate the particles and reduce the mutual interference among the particles before driving imaging; the fourth stage (stage4) is divided into 4 driving sub-signals, which are respectively a HIGH voltage signal, a LOW voltage signal, a VCOM voltage signal, and the corresponding driving durations are respectively 2, 3, 0, and 10, wherein the corresponding driving times of the HIGH voltage signal and the LOW voltage signal are 56, and the corresponding driving times of the VCOM voltage signal and the VCOM voltage signal are 5, so as to make the black, white, and red particles rapidly oscillate to separate them, and reduce the mutual interference among the particles before driving imaging; the fifth stage (stage5) is divided into 4 driving sub-signals, which are respectively a LOW voltage signal, a VCOM voltage signal, and a VCOM voltage signal, the corresponding driving durations are respectively 8, 0, 56, and 0, the corresponding driving times are 8, and the purpose is white particle driving imaging; the sixth stage (stage6) is divided into 4 driving sub-signals, which are respectively a LOW voltage signal, a VCOM voltage signal, and a VCOM voltage signal, the corresponding driving time duration is 6, and 0, the corresponding driving frequency is 3, and the purpose is white particle driving imaging; the seventh stage (stage7) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time length of 4, 0, 32, 0, corresponding to driving frequency of 3, and the stage is not used temporarily; the eighth stage (stage8) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, 10, corresponding to driving frequency of 2, and the stage is not used temporarily; the ninth stage (stage9) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, corresponding to driving frequency of 0, and the stage is not used temporarily; the tenth stage (stage10) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, respectively, corresponding to driving frequency of 0, and is not used for the moment.
Finally, the red particle driving waveform includes a plurality of sub-signals corresponding to a plurality of driving stages, as shown in fig. 1, including 10 stages of driving signals. Wherein the first stage (stage1) is divided into 4 driving sub-signals, which are a VCOM voltage signal, and a HIGH voltage signal, respectively, the corresponding driving durations are 32, 22, 41, and 0, respectively, and the corresponding driving times are 2, so as to balance the position of the red charged particles to an initial position; the second stage (stage2) is divided into 4 driving sub-signals, namely, a LOW voltage signal and a LOW voltage signal, the corresponding driving time lengths are respectively 5, 6 and 6, the corresponding driving times are 5, and the purpose is to balance the position of the red charged particles to an initial position; the third stage (stage3) is divided into 4 driving sub-signals, namely a HIGH voltage signal, a LOW voltage signal, a HIGH voltage signal and a LOW voltage signal, the corresponding driving time lengths are respectively 26, 28, 26 and 28, the corresponding driving frequency is 6, and the purpose is to make the black, white and red particles vibrate slowly to separate the particles and reduce the mutual interference among the particles before driving imaging; the fourth stage (stage4) is divided into 4 driving sub-signals, which are respectively a HIGH voltage signal, a LOW voltage signal, a VCOM voltage signal and a HIGH voltage signal, and the corresponding driving durations are respectively 2, 3, 0 and 10, wherein the corresponding driving times of the HIGH and LOW voltage signals are 56, the corresponding driving times of the VCOM and HIGH voltage signals are 5, the purpose is to make the black, white and red particles rapidly oscillate and move to separate the particles, the mutual interference among the particles before driving imaging is reduced, and the purpose of the last HIGH voltage signal is to increase the black chroma value, so as to prevent the black picture from remaining red particles after imaging; the fifth stage (stage5) is divided into 4 driving sub-signals, which are respectively a LOW voltage signal, a VCOM voltage signal, a Red voltage signal and a VCOM voltage signal, the corresponding driving durations are respectively 8, 0, 56 and 0, the corresponding driving times are 8, and the purpose of driving and imaging Red particles is Red; the sixth stage (stage6) is divided into 4 driving sub-signals, which are VCOM voltage signal, Red voltage signal, and VCOM voltage signal, respectively, the corresponding driving duration is 6, and 0, the corresponding driving frequency is 3, and the purpose is Red particle driving imaging; the seventh stage (stage7) is divided into 4 driving sub-signals, which are respectively a LOW voltage signal, a VCOM voltage signal, a Red voltage signal and a VCOM voltage signal, the corresponding driving durations are respectively 4, 0, 32 and 0, the corresponding driving times are 3, and the purpose is Red particle driving imaging; the eighth stage (stage8) is divided into 4 driving sub-signals, which are VCOM voltage signal, Red voltage signal, respectively, the corresponding driving duration is 0, 10, the corresponding driving frequency is 2, and the purpose is Red particle driving imaging; the ninth stage (stage9) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, corresponding to driving frequency of 0, and the stage is not used temporarily; the tenth stage (stage10) is divided into 4 driving sub-signals, which are VCOM voltage signal, respectively, corresponding to driving time duration of 0, respectively, corresponding to driving frequency of 0, and is not used for the moment.
After the driving stages, the color contrast, the residual image data and the like of the display picture of the electronic paper can be acquired through a specific optical testing instrument, and the driving parameters of the driving sub-signals of the driving stages are adjusted according to the acquired display data. Such as adjusting the driving times, obtaining the combination mode of the adjustment driving sub-signals, etc.
The "HIGH voltage signal" and the "LOW voltage signal" referred to in the present invention are "HIGH voltage signal", "LOW voltage signal", and "Red voltage signal" which refer to black, white, and Red particle driving voltages, respectively, with respect to a voltage value (i.e., a reference voltage value) of a voltage signal applied to the second electrode layer.
The embodiment provides a driving system of three-color flexible electronic paper, which is used for executing the driving method of the three-color flexible electronic paper described in the foregoing method embodiments. Since the technical principle of the system embodiment is similar to that of the method embodiment, repeated description of the same technical details is omitted.
In one embodiment, a driving system of a three-color flexible electronic paper includes:
a flexible electronic paper comprising a plurality of pixels, at least one pixel comprising: black charged particles, white charged particles, and red charged particles;
the driving voltage setting module is used for setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of the electronic paper, and setting corresponding white charged particles and black charged particle driving voltages according to the red charged particle driving voltage;
the driving signal generating module is used for respectively constructing a plurality of groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles;
and the driving display module is used for controlling the magnitude and the direction of the electric field at the two ends of the corresponding pixel according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial position of the corresponding charged particles before displaying the appointed picture, and moving the charged particles to be displayed close to the display surface of the electronic paper to a non-display surface.
In summary, according to the driving method and system for three-color flexible electronic paper, the reference voltage and the driving voltage are set through sample screening, the display effect of the electronic paper can be effectively improved, the display ghost can be eliminated by constructing the driving waveform for each driving stage of the charged particles with different colors, the driving method and system are suitable for environments with various temperature and humidity differences, and the adaptability is improved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A driving method of three-color flexible electronic paper is characterized in that the electronic paper comprises a plurality of pixels, and at least one pixel comprises: black charged particles, white charged particles, and red charged particles;
setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of the electronic paper, and setting a corresponding white charged particle driving voltage and a corresponding black charged particle driving voltage according to the red charged particle driving voltage;
respectively constructing multiple groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles;
and controlling the magnitude and the direction of the electric field at two ends of the corresponding pixel according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial position of the corresponding charged particles before displaying the appointed picture, and moving the charged particles to be displayed close to the display surface of the electronic paper to a non-display surface.
2. The method of claim 1, wherein setting a reference voltage and a red charged particle driving voltage of an electronic paper according to sample data of a plurality of electronic papers, and setting corresponding white charged particles and black charged particle driving voltages according to the red charged particle driving voltage, comprises:
selecting a specified number of electronic paper samples, reading the initial reference voltage of each electronic paper sample, and setting the reference voltage according to the average value of the obtained initial reference voltages;
and respectively measuring driving voltage curves of the red charged particles at a plurality of different environmental temperatures, and selecting the driving voltage corresponding to the maximum value of the red optical value in each driving voltage curve as the driving voltage of the red charged particles, wherein the red optical value comprises contrast or brightness.
3. The method of driving a three-color flexible electronic paper according to claim 1, wherein the sets of driving sub-signals for the black charged particles include: a black particle balance sub-signal, a black particle separation sub-signal, and a black particle imaging sub-signal; the driving phase corresponding to the black particle balance sub-signal is a first driving phase of the plurality of driving phases, and the black particle balance sub-signal is configured to make the position of the black charged particles be at an initial position, where the initial position is a position of the black charged particles when the black pixel to be displayed is not driven by the black charged particle driving voltage; the black particle imaging sub-signal is configured to drive the black charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the black pixel to be displayed displays black; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
4. The driving method of three-color flexible electronic paper according to claim 1, wherein the plurality of sets of driving sub-signals of the white charged particles comprise: a white ion balance sub-signal, a white ion separation sub-signal, and a white ion imaging sub-signal; a driving phase corresponding to the white particle balance sub-signal is a first driving phase of the plurality of driving phases, the white balance sub-signal is configured to make the position of the white charged particles be at an initial position, wherein the initial position is the position of the white charged particles when the white pixel to be displayed is not driven by the white charged particle driving signal; the white particle imaging sub-signal is configured to drive the white charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the white pixel to be displayed displays white; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
5. The method of driving a three-color flexible electronic paper according to claim 1, wherein the sets of driving sub-signals of the red charged particles include: a red ion-balance sub-signal, a red ion-separation sub-signal, and a red ion-imaging sub-signal; the driving phase corresponding to the red particle balance sub-signal is a first driving phase of the plurality of driving phases, and the red particle balance sub-signal is configured to make the position of the red charged particle be at an initial position, where the initial position is the position of the red charged particle when the red pixel to be displayed is not driven by the red charged particle driving signal; the red particle imaging sub-signal is configured to drive the red charged particles in the pixel to move to a side close to the display surface of the electronic paper, so that the red pixel to be displayed displays red; the particle separation sub-signal is configured to drive the black charged particles, the white charged particles, and the red charged particles in the pixel to move and separate the black charged particles, the white charged particles, and the red charged particles.
6. The driving method of three-color flexible electronic paper according to claim 1, wherein driving parameters of each of the driving stages of each charged particle are set, and the driving parameters are adjusted according to the display data of the electronic paper, wherein the driving parameters include: driving voltage duration, driving times and driving sub-signal frequency.
7. The driving method of a three-color flexible electronic paper according to claim 1, wherein the electronic paper display data includes contrast and afterimage data.
8. The method for driving a three-color flexible electronic paper according to claim 1, wherein the driving voltage curve is plotted with respect to a red optical value corresponding to a red voltage.
9. A driving system of three-color flexible electronic paper, comprising:
a flexible electronic paper comprising a plurality of pixels, at least one pixel comprising: black charged particles, white charged particles, and red charged particles;
the driving voltage setting module is used for setting a reference voltage and a red charged particle driving voltage of the electronic paper according to sample data of the electronic paper, and setting corresponding white charged particles and black charged particle driving voltages according to the red charged particle driving voltage;
the driving signal generating module is used for respectively constructing a plurality of groups of driving sub-signals corresponding to each charged particle according to the reference voltage, the red charged particle driving voltage, the white charged particle driving voltage and/or the black charged particle driving voltage, wherein each group of driving sub-signals corresponds to one driving stage of different charged particles;
and the driving display module is used for controlling the magnitude and the direction of the electric field at the two ends of the corresponding pixel according to the driving sub-signals, executing driving tasks corresponding to a plurality of driving stages, adjusting the initial position of the corresponding charged particles before displaying the appointed picture, and moving the charged particles to be displayed close to the display surface of the electronic paper to a non-display surface.
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