Electronic ink screen control method, display control device and electronic ink display device

Abstract

A control method for an electronic ink screen comprises: inputting a first color driving signal into a pixel of the electronic ink screen to display a first color; wherein the first color driving signal comprises sub-signals of multiple stages, the sub-signals of the multiple stages comprise a first jitter signal and a first color first push-up signal in adjacent stages, the first color first push-up signal being in a stage after the stage corresponding to the first jitter signal; the first jitter signal comprises: a first rectangular wave, an electric field cancellation signal and a first constant voltage signal arranged in sequence, the first constant voltage signal being configured to drive the first color charged particles in the pixel to move toward a side close to a display surface of the electronic ink screen; the first color first push-up signal being configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a control method for an electronic ink screen, a display control device, and an electronic ink display device. Background Art

[0002] Like traditional ink, electronic ink can be printed onto the surface of many materials (eg, plastic, polyester film, paper, cloth, etc.); the difference is that electronic ink can change the displayable color under the action of an electric field, so that an electronic ink display device made with electronic ink can display images.

[0003] Compared with other types of displays, such as liquid crystal displays (LCD) and organic electroluminescence displays (OLED), electronic ink display devices have the advantages of low power consumption, easy readability, and easy and cheap manufacturing. Summary of the invention

[0004] On the one hand, a control method of an electronic ink screen is provided, wherein the electronic ink screen includes a plurality of pixels, and at least one pixel includes charged particles of a first color. The control method of the electronic ink screen includes: inputting a first color driving signal to a pixel to be displayed in the electronic ink screen in the first color; wherein the first color driving signal includes sub-signals of multiple stages, and the sub-signals of the multiple stages include a first jitter signal and a first color first push-up signal in adjacent stages, and the first color first push-up signal is in a stage after the stage corresponding to the first jitter signal; the first jitter signal includes: a first rectangular wave, an electric field cancellation signal and a first constant voltage signal arranged in sequence, and the first constant voltage signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; the first color first push-up signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen.

[0005] In some embodiments, the first rectangular wave includes a first level signal and a second level signal arranged alternately; the first constant voltage signal has a voltage value substantially the same as that of one of the first level signal and the second level signal, or the voltage value of the first constant voltage signal is between the voltage value of the first level signal and the voltage value of the second level signal.

[0006] In some embodiments, the first color first push-up signal includes: a second constant voltage signal, a voltage value of the second constant voltage signal is between the voltage value of the first level signal and the voltage value of the second level signal; when the voltage value of the first constant voltage signal is between the voltage value of the first level signal and the voltage value of the second level signal, the voltage value of the first constant voltage signal is equal to the voltage value of the second constant voltage signal.

[0007] In some embodiments, the first color driving signal includes sub-signals of seven stages, wherein the sub-signals of the first stage to the seventh stage included in the first color driving signal are, in sequence: an electric field cancellation signal; a first color pull-down signal, configured to drive the first color charged particles in the pixel to move toward a side away from the electronic ink screen display surface; a second jitter signal, including a second rectangular wave, the frequency of the second rectangular wave is a second frequency; the first jitter signal, the frequency of the first rectangular wave is a first frequency; the first color first push-up signal; an electric field cancellation signal; a first color second push-up signal, the first color second push-up signal is configured to drive the first color charged particles in the pixel to move toward a side close to the electronic ink screen display surface; wherein the first frequency is greater than the second frequency.

[0008] In some embodiments, at least one pixel also includes second color charged particles and third color charged particles, the first color charged particles and the second color charged particles have the same charge, the first color charged particles and the third color charged particles have opposite charge, and the mass of the first color charged particles is greater than the mass of the second color charged particles.

[0009] In some embodiments, the control method of the electronic ink screen also includes: inputting a second color driving signal into the pixels to be displayed in the electronic ink screen; wherein the second color driving signal includes sub-signals of multiple stages; the sub-signal in the second color driving signal that is in the same stage as the first dithering signal is a third dithering signal, and the third dithering signal includes: a third rectangular wave and an electric field cancellation signal arranged in sequence.

[0010] In some embodiments, the second color driving signal includes sub-signals of seven stages, wherein the sub-signals of the first stage to the seventh stage included in the second color driving signal are, in sequence: a second color pull-down signal, configured to drive the second color charged particles in the pixel to move toward a side away from the electronic ink screen display surface; a fourth jitter signal, including a fourth rectangular wave; a fifth jitter signal, including a fifth rectangular wave, the frequency of the fifth rectangular wave is a fifth frequency; the third jitter signal, the frequency of the third rectangular wave is a third frequency; an electric field cancellation signal; a second color push-up signal, configured to drive the second color charged particles in the pixel to move toward a side close to the electronic ink screen display surface; an electric field cancellation signal; wherein the third frequency is greater than the fifth frequency.

[0011] In some embodiments, the third frequency is equal to the first frequency, and the fifth frequency is equal to the second frequency.

[0012] In some embodiments, the control method of the electronic ink screen also includes: inputting a third color driving signal into pixels to be displayed in the electronic ink screen, wherein the third color driving signal includes sub-signals of multiple stages; the sub-signal in the third color driving signal that is in the same stage as the first dithering signal is a sixth dithering signal, and the sixth dithering signal includes: a sixth rectangular wave and an electric field cancellation signal arranged in sequence.

[0013] In some embodiments, the third color driving signal includes sub-signals of seven stages, wherein the sub-signals of the first stage to the seventh stage included in the third color driving signal are respectively: a third color pull-down signal, configured to drive the third color charged particles in the pixel to move toward a side away from the electronic ink screen display surface; a seventh jitter signal, wherein the seventh jitter signal includes a seventh rectangular wave; an eighth jitter signal, wherein the eighth jitter signal includes an eighth rectangular wave, and the frequency of the eighth rectangular wave is an eighth frequency; the sixth jitter signal, wherein the frequency of the sixth rectangular wave is a sixth frequency; an electric field cancellation signal; a third color push-up signal, configured to drive the third color charged particles in the pixel to move toward a side close to the electronic ink screen display surface; an electric field cancellation signal; wherein the sixth frequency is greater than the eighth frequency.

[0014] In some embodiments, the sixth frequency is equal to the first frequency, and the eighth frequency is equal to the second frequency.

[0015] In some embodiments, when the colors in the picture to be displayed include a second color, a third color and a first color, a second color driving signal is output to pixels in the electronic ink screen to display the second color, a third color driving signal is output to pixels in the electronic ink screen to display the third color, and a first color driving signal is output to pixels in the electronic ink screen to display the first color, including: in the Ith display driving stage of displaying the picture to be displayed, each row of pixels of the electronic ink screen is scanned in sequence; a sub-signal of the Ith stage in the second color driving signal is output to pixels in each scanned row of pixels to display the second color, a sub-signal of the Ith stage in the third color driving signal is output to pixels in each scanned row of pixels to display the third color, and a sub-signal of the Ith stage in the first color driving signal is output to pixels in each scanned row of pixels to display the first color; wherein, I≥1, and the second color driving signal, the third color driving signal and the first color driving signal include the same number of stages.

[0016] In some embodiments, when each of the pixels includes charged particles of the second color, charged particles of the third color, and charged particles of the first color, a second color driving signal is output to the pixel to be displayed in the electronic ink screen for displaying the second color, a third color driving signal is output to the pixel to be displayed in the electronic ink screen for displaying the third color, and a first color driving signal is output to the pixel to be displayed in the electronic ink screen for displaying the first color, including: according to a stored second color waveform file, outputting a second color driving signal corresponding to the second color waveform file to the pixel to be displayed for displaying the second color; according to a stored third color waveform file, outputting a third color driving signal corresponding to the third color waveform file to the pixel to be displayed for displaying the third color; according to a stored first color waveform file, outputting a first color driving signal corresponding to the first color waveform file to the pixel to be displayed for displaying the first color.

[0017] On the other hand, a display control device is provided. The display control device includes: a source driver and at least one processor. Among them, at least one processor is configured to control the source driver to input a first color driving signal to a pixel to be displayed in the electronic ink screen in the first color; wherein the first color driving signal includes sub-signals of multiple stages, and the sub-signals of the multiple stages include a first jitter signal and a first color first push-up signal in adjacent stages, and the first color first push-up signal is in the latter stage of the stage corresponding to the first jitter signal; the first jitter signal includes: a first rectangular wave, an electric field cancellation signal and a first constant voltage signal arranged in sequence, and the first constant voltage signal is configured to drive the first color charged particles in the pixel to move toward the side close to the display surface of the electronic ink screen; the first color first push-up signal is configured to drive the first color charged particles in the pixel to move toward the side close to the display surface of the electronic ink screen.

[0018] In some embodiments, the at least one processor is also configured to control the source driver to input a second color drive signal to the pixels to be displayed in the electronic ink screen. The second color drive signal includes sub-signals of multiple stages. The sub-signal in the second color drive signal that is in the same stage as the first dithering signal is a third dithering signal. The third dithering signal includes: a third rectangular wave and an electric field cancellation signal arranged in sequence.

[0019] In some embodiments, the at least one processor is also configured to control the source driver to input a third color drive signal to the pixels to be displayed in the electronic ink screen. The third color drive signal includes sub-signals of multiple stages. The sub-signal in the third color drive signal that is in the same stage as the first dithering signal is a sixth dithering signal. The sixth dithering signal includes: a sixth rectangular wave and an electric field cancellation signal arranged in sequence.

[0020] In some embodiments, the display control device further includes: a gate driver. The at least one processor is configured to control the gate driver to sequentially scan each row of pixels of the electronic ink screen in the Ith display driving stage of displaying the image to be displayed; and control the source driver to output the Ith stage sub-signal of the second color drive signal to the pixels to be displayed in each row of pixels scanned for the second color, output the Ith stage sub-signal of the third color drive signal to the pixels to be displayed in each row of pixels scanned for the third color, and output the Ith stage sub-signal of the first color drive signal to the pixels to be displayed in each row of pixels scanned for the first color; wherein, I≥1, and the second color drive signal, the third color drive signal, and the first color drive signal include the same number of stages.

[0021] In some embodiments, the display control device further includes: at least one memory configured to store a second color waveform file, a third color waveform file, and a first color waveform file; the at least one processor is further configured to output a third color driving signal corresponding to the third color waveform file to a pixel to be displayed with a third color according to the stored third color waveform file; and to output a first color driving signal corresponding to the first color waveform file to a pixel to be displayed with a first color according to the stored first color waveform file.

[0022] In another aspect, an electronic ink display device is provided, wherein the electronic ink display device comprises: an electronic ink display screen and a display control device in any one of the above embodiments.

[0023] On the other hand, a computer-readable storage medium is provided, which stores computer program instructions. When the computer program instructions are executed on an electronic ink display device, the electronic ink display device executes the control method of the electronic ink screen in any of the above embodiments.

[0024] In another aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed on a processor, the processor executes one or more steps in the method for controlling an electronic ink screen as described in any of the above embodiments.

[0025] In another aspect, a computer program product is provided. The computer program product includes computer program instructions, and when the computer program instructions are executed on a computer, the computer program instructions cause the computer (e.g., an electronic ink display device) to execute one or more steps in the method for controlling an electronic ink screen as described in any of the above embodiments.

[0026] In another aspect, a computer program is provided. When the computer program is executed on a computer, the computer program enables the computer (eg, an electronic ink display device) to execute one or more steps in the control method of the electronic ink screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0028] Figure 1 is a structural diagram of a system architecture using an electronic ink display device according to some embodiments of the present disclosure;

[0029] Figure 2 is a structural diagram of an electronic ink display device according to some embodiments of the present disclosure;

[0030] Figure 3 is a structural diagram of an electronic ink screen according to some embodiments of the present disclosure;

[0031] Figure 4 is a structural diagram of the connection between a pixel driving circuit and a pixel electrode according to some embodiments of the present disclosure;

[0032] Figure 5 is a structural diagram of a display control device according to some embodiments of the present disclosure;

[0033] Figure 6 is a structural diagram of another display control device according to some embodiments of the present disclosure;

[0034] Figure 7 is a flow chart of a method for controlling an electronic ink screen according to some embodiments of the present disclosure;

[0035] Figure 8 A screen displayed on an electronic price tag according to some embodiments of the present disclosure;

[0036] Fig. 9 A template screen of an electronic price label according to some embodiments of the present disclosure;

[0037] Fig.10 A waveform diagram of a data driving signal in a control method of an electronic ink screen according to some embodiments of the present disclosure;

[0038] Fig.11 is a waveform diagram of another data driving signal in the control method of the electronic ink screen according to some embodiments of the present disclosure;

[0039] Fig.12 These are two pictures to be displayed used when testing the afterimage effect according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0041] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0042] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0043] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0044] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0045] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0046] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0047] In order to meet the user's demand for image quality when refreshing the screen, the display device is generally tested for afterimages before the product leaves the factory. When switching screens on a display device, the previous screen does not disappear immediately, and the visual effect appears at the same time as the next screen, which is called afterimage. Among them, the image that remains from the previous screen during the display of the next screen is called afterimage. The afterimage test is to test the degree of residue of the previous screen during the display of the next screen when switching between screens of different colors.

[0048] As is known to all, there are many types of display devices, such as liquid crystal display devices and electronic ink display devices, etc. Among them, electronic ink display devices are widely favored by consumers because of their many advantages. For example, an electronic ink display device can display black, white and red images. If you want to test the residual image in the red image, you can switch the black image to the red image to test the residual degree of the black image when the red image is displayed; and you can switch the white image to the red image to test the residual degree of the white image when the red image is displayed. However, the inventors found that in the related art, the residual image in the red image of the electronic ink display device is more serious, which affects the display quality of the product.

[0049] To address this problem, see Figure 1Some embodiments of the present disclosure provide a system architecture using an electronic ink display device, including: an electronic ink display device 100 and a communication peer device 200, which can be communicatively connected. Among them, the communication peer device 200 is configured to control the image (i.e., the screen) displayed on the electronic ink display device 100. In some embodiments, the electronic ink display device 100 can establish a connection with the communication peer device 200 through wireless communication (for example, Wi-Fi, Bluetooth, etc.). For example, the above system architecture also includes a wireless router or a wireless access point 300. The communication peer device 200 is connected to the wireless router or wireless access point (Access Point, AP) 300 through wireless communication or wired communication, and the electronic ink display device 100 establishes a connection with the wireless router or wireless access point 300 through wireless communication, and then communicates with the communication peer device 200. Of course, this embodiment is not limited to this communication connection method. For example, the communication peer device 200 and the electronic ink display device 100 can also establish a connection through wired communication.

[0050] The electronic ink display device 100 described above can be applied to a variety of scenarios, for example, the electronic ink display device 100 can be an electronic reader, a smart tag (also called an electronic tag), an electronic watch (for example, an electronic watch), a thermometer, a bus stop sign, and a gas station oil price sign, etc. Among them, the smart tag can include: an electronic price tag that can be placed on shelves in supermarkets, convenience stores, drug stores, etc., a luggage tag, and a drug label set on a drug package, etc.

[0051] See also Figure 2 The electronic ink display device 100 may include: an electronic ink screen 1, a display control device 2 and a communication device 3. The electronic ink screen 1 and the communication device 3 are both connected to the display control device 2.

[0052] See also Figure 3In some embodiments, the electronic ink screen 1 includes a substrate 11, an electronic ink film (Front Panel Liner, FPL) 12 disposed on the substrate 11, a first electrode layer 13 and a second electrode layer 14. In the thickness direction of the substrate 11, the first electrode layer 13 and the second electrode layer 14 are disposed on both sides of the electronic ink film, and the first electrode layer 13 is closer to the substrate 11 than the second electrode layer 14. Generally speaking, the second electrode layer 14 is closer to the display surface of the electronic ink screen 1 than the first electrode layer 13. The electronic ink film 12 includes a plurality of microstructures 121, such as microcups or microcapsules. Each microstructure 121 includes a transparent liquid and a plurality of charged particles. By supplying power to the first electrode layer 13 and the second electrode layer 14, the electric field formed therebetween can drive the movement of the charged particles in each microstructure 121, so as to control the charged particles in each microstructure 121 suspended at a position close to the display surface ( Figure 3 The type of charged particles at the top of the microstructure 121 is determined by adjusting the color of each microstructure 121, thereby controlling the color presented by each microstructure 121, thereby enabling the electronic ink screen 1 to display images.

[0053] Among the multiple charged particles included in the electronic ink film 12, there may be two charged particles of different colors and the same electrical properties (i.e., the charges carried have the same electrical properties), and one of the two charged particles has a larger mass than the other. In this case, the larger mass particle can be used as the first color charged particle, and the smaller mass particle can be used as the second color charged particle. The density of the first color charged particle and the second color charged particle can be the same or approximately the same, and the volume of the first color charged particle is larger than the volume of the second color charged particle.

[0054] For example, the multiple charged particles included in the electronic ink film 12 may include: first color charged particles, second color charged particles and third color charged particles, the first color charged particles and the second color charged particles have the same charge, the first color charged particles and the third color charged particles have opposite charge, and the mass of the first color charged particles is greater than the mass of the second color charged particles. For example, the electronic ink film 12 includes white charged particles WG, black charged particles BG and color charged particles CG (for example, red charged particles), wherein the white charged particles WG can be negatively charged, the black charged particles BG and the color charged particles CG can be positively charged, and the mass of the color charged particles CG is greater than the mass of the black charged particles BG, then the color charged particles CG are used as the first color charged particles, the black charged particles BG are used as the second color charged particles, and the white charged particles WG are used as the third color charged particles. For another example, the electronic ink film 12 includes white charged particles WG, black charged particles BG and colored charged particles CG, wherein the colored charged particles CG can be negatively charged, one of the white charged particles WG and the black charged particles BG (for example, the white charged particles WG) can be negatively charged, and the other (for example, the black charged particles BG) is positively charged; wherein, the mass of the colored charged particles CG is greater than the mass of the one with the same charge as it (for example, the white charged particles WG), then the colored charged particles CG serve as the first color charged particles, the one with the same charge as the colored charged particles CG (the white charged particles WG) serves as the second color charged particles, and the black charged particles BG serve as the third color charged particles.

[0055] For example, the multiple charged particles included in the electronic ink film 12 may include two types of charged particles, namely: first color charged particles and second color charged particles, the two have the same electrical properties, and the mass of the first color charged particles is greater than the mass of the second color charged particles. For example, the electronic ink film 12 includes two types of charged particles, color charged particles CG and black charged particles BG, wherein both the color charged particles CG and the black charged particles BG are positively charged, and the mass of the color charged particles CG is greater than the mass of the black charged particles BG, then the color charged particles CG are used as the first color charged particles, and the black charged particles BG are used as the second color charged particles.

[0056] See also Figure 3The electronic ink film 12, the first electrode layer 13 and the second electrode layer 14 in the above-mentioned electronic ink screen 1 can constitute a plurality of pixels P. For example, the plurality of pixels P can be distributed in an array, that is, the electronic ink screen includes S rows and Q columns of pixels P, S≥2, Q≥2. Correspondingly, the first electrode layer 13 may include a plurality of first electrodes (also referred to as pixel electrodes) 131 distributed at intervals; the second electrode layer 14 may include a plurality of second electrodes (also referred to as common electrodes) 141 located opposite to the plurality of first electrodes 131, and the plurality of second electrodes 141 may be electrically connected to each other. For example, the second electrode layer 14 may be a planar electrode layer, which only includes a closed contour line. As an example, a pixel P may include a first electrode 131 and one or more microstructures 121 (for example, it may be a microstructure 121), or it may be as follows Figure 3 As shown, one microstructure 121 is distributed in two adjacent pixels P.

[0057] In this way, the display control device 2 can apply a voltage signal (which can be called a COM signal, and its voltage value can be represented by CM) to the second electrode layer 14, and in the process of refreshing the picture displayed on the electronic ink screen 1, a corresponding data drive signal can be applied to the first electrode 131 included therein according to the pixel data of each pixel P. The data drive signal is a signal that changes within the range defined by a high voltage value (i.e., a voltage value higher than the COM signal, which can be represented by HI) and a low voltage value (i.e., a voltage value lower than the COM signal, which can be represented by LO). For example, if the pixel data of a pixel P is first color pixel data, a first color driving signal is applied to the first electrode 131 of the pixel P, so that after the image refresh is completed, the first color charged particles in the pixel P are suspended at a position close to the display surface, so that the pixel P displays the first color; if the pixel data of a pixel P is second color pixel data, a second color driving signal is applied to the first electrode 131 of the pixel P, so that after the image refresh is completed, the second color charged particles in the pixel P are suspended at a position close to the display surface, so that the pixel P displays the second color; if the pixel data of a pixel P is third color pixel data, a third color driving signal is applied to the first electrode 131 of the pixel P, so that after the image refresh is completed, the third color charged particles in the pixel P are suspended at a position close to the display surface, so that the pixel P displays the third color.

[0058] In some embodiments, see Figure 3 The electronic ink screen 1 may further include a pixel driving circuit 15 disposed on the substrate 11 to apply a data driving signal to each first electrode 131 in the first electrode layer 13. Figure 4, the pixel driving circuit 15 may include a plurality of gate lines 151 and a plurality of data lines 152, the plurality of gate lines GL and the plurality of data lines DL are arranged crosswise, for example, arranged perpendicularly to each other; the pixel driving circuit 15 may also include a switching device 153 connected to the crossed gate lines GL and data lines DL, for example, a thin film transistor (Thin Field Transistor, TFT). The display control device 2 is connected to the plurality of gate lines 151 to input scanning signals to the plurality of gate lines 151 to control the gating of each row of pixels P connected to the plurality of gate lines 151. For example, the display control device 2 may scan the plurality of rows of pixels P row by row, that is, in the order from the first row of gate lines to the last row of gate lines, input scanning signals to the plurality of gate lines 151 row by row, so that each switching device 153 connected to the scanned gate lines 151 is in a conducting state. The display control device 2 is connected to a plurality of data lines 152 to input a data drive signal to the first electrode 131 in each row of pixels P that is selected (scanned), so that each pixel P presents a corresponding color under the action of the electric field. For example, CM is 0V, HI is 15V, and LO is -15V. At this time, a 0V signal is provided to the second electrode layer, and a data drive signal in the range of -15V to 15V is provided to the first electrode 131 to control the magnitude of the electric field in which the pixel P is located.

[0059] The electronic ink screen 1 has a bistable characteristic. Even if the above electric field is cancelled, the electronic ink screen 1 can stay on the last refreshed image. Therefore, the electronic ink screen 1 does not need continuous power supply to maintain the image. In this way, the electronic ink display device 100 can achieve low power consumption.

[0060] In some embodiments, see Figure 5 The display control device 2 includes at least one processor 21 , at least one memory 22 , a gate driver 23 (optional) and a source driver 24 .

[0061] The gate driver 23 may also be referred to as a gate driving circuit, and is configured to output a scanning signal to the electronic ink screen 1 to control the gating of each row of pixels under the control of at least one processor 21. The gate driver 23 may be provided in the display control device 2 or in the electronic ink screen 1. This embodiment does not limit this, and takes the gate driver 23 provided in the display control device 2 as an example.

[0062] The source driver 24 may also be referred to as a source driving circuit, which is configured to output a data driving signal to the electronic ink screen 1 under the control of at least one processor 21 to control the color displayed by each pixel.

[0063] For example, the gate driver 23 and / or the source driver 24 may send a BUSY signal (busy status signal) to the processor 21 to inform the processor 21 of the status of itself (the gate driver 23 and / or the source driver 24). The processor 21 may determine whether to send a command or data to the gate driver 23 and / or the source driver 24 based on the BUSY signal. The processor 21 sends a CLK (clock) signal to the gate driver 23 and the source driver 24 to provide the gate driver 23 and the source driver 24 with the clock required for their operation. In addition, the processor 21 may also send a direct current (DC) signal to the gate driver 23 and the source driver 24 to inform the gate driver 23 and / or the source driver 24 whether the next command or data is to be sent. The source driver 24 may include a plurality of source driver sub-circuits, and the processor 21 may send a chip select (CS) signal to one of the plurality of source driver sub-circuits to select this source driver sub-circuit for signal transmission. For example, the processor 21 may send a start scanning command to the gate driver 23 to start scanning the first row of gate lines of the electronic ink screen; and may also send a data driving signal (ie, data) to the source driver 24 .

[0064] The memory 22 can store computer programs and data, and can include high-speed random access memory, and can also include non-volatile memory, such as disk storage devices, flash memory devices, etc., and can also be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, and can also be one-time programmable memory (OTP), electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage devices, or any other medium that can be used to carry or store program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 22 can exist independently and be connected to the processor 21 through a communication line. The memory can also be integrated with the processor 21.

[0065] At least one processor 21 is connected to the gate driver 23, the source driver 24 and at least one memory 22, and calls the data in the memory 22 by running or executing the computer program stored in the memory 22 to control the gate driver 23 and the source driver 24 to output corresponding signals. The at least one processor 21 may be one or more general-purpose central processing units (CPU), microprocessors (MCU), logic devices (Logic), application-specific integrated circuits (ASIC) or integrated circuits for controlling the execution of programs in some embodiments of the present disclosure; wherein the CPU may be a single-core processor (singleCPU) or a multi-core processor (multi-CPU). A processor 21 here may refer to one or more devices, circuits or processing cores for processing data (such as computer program instructions, etc.).

[0066] Continue to see Figure 5 The display control device 2 may further include a temperature sensor 25 connected to the at least one processor 21. The temperature sensor 25 is configured to measure the ambient temperature and send the ambient temperature to the at least one processor 21, so that the at least one processor 21 controls the source driver 24 to output a data driving signal corresponding to the ambient temperature according to the ambient temperature.

[0067] In other embodiments, see Figure 6 , at least one processor 21 in the display control device 2 may include: a first processor 21a and a second processor 21b. As an example, the first processor 21a is a logic device (Logic), and the second processor 21b may be a microprocessor; compared with the microprocessor, the logic device may not include a data transmission function. At least one memory 22 may include: a first memory 22a and a second memory 22b. As an example, the first memory 22a is a one-time programmable memory, and the second memory 22b is a random access memory. As an example, the first processor 21a can realize its corresponding function by running a computer program stored in the first memory 22a.

[0068] For example, the first processor 21a, the first memory 22a, the second memory 22b, the gate driver 23, the source driver 24 and the temperature sensor 25 can be integrated together as a display driver chip. The display driver chip is electrically connected to the second processor 21b via a serial peripheral interface (SPI).

[0069] In some embodiments, the communication device 3 is a device for information interaction with an external device (AP or wireless router), connected to at least one processor 21, for example, it can be connected to the second processor 21b, so as to send data or commands to the external device under the control of the processor 21, or receive data or commands sent by the external device. The communication device 3 can be a transceiver, a transceiver circuit, a transmitter, a receiver, etc.; for example, it can be a wireless communication device such as a Wi-Fi (Wireless-Fidelity, wireless network) device, a Bluetooth device, or a wired communication device such as a universal serial bus (USB) interface. Among them, the Wi-Fi device provides the electronic ink display device 100 with network access that complies with the Wi-Fi related standard protocol. The Bluetooth device can be an integrated circuit or a Bluetooth chip, etc. As an example, the communication device 3 and the processor 21 can be set separately or integrated together, for example, the communication device 3 can be integrated with the second processor 21b.

[0070] In some embodiments, the above-mentioned communication peer device 200 can be a server or a terminal. The terminal can be a personal computer (PC), such as a desktop, a laptop, a tablet computer, and an ultrabook, etc.; it can also be a handheld terminal such as a mobile phone.

[0071] Based on the electronic ink display device introduced above, some embodiments of the present disclosure provide a control method for an electronic ink screen 1, and the execution subject may be the display control device 2 described above, or a product including the display control device 2 described above, such as the electronic ink display device 100. As an example, the first color is color, the second color is black, and the third color is white. Correspondingly, the first color charged particles may be color charged particles, the second color charged particles may be black charged particles, and the third color charged particles may be white charged particles, wherein the color charged particles have the same electrical properties as the black charged particles, and the former has a larger mass than the latter. The first color driving signal is a color driving signal, and the sub-signals of the multiple stages included in the first color driving signal may be: an electric field cancellation signal, a color pull-down signal, a second jitter signal, a first jitter signal, a color first push-up signal, an electric field cancellation signal, and a color second push-up signal. The sub-signals of the multiple stages included in the second color driving signal may be: a black pull-down signal, a fourth jitter signal, a fifth jitter signal, a third jitter signal, an electric field cancellation signal, a black push-up signal, and an electric field cancellation signal. The sub-signals of the multiple stages included in the third color driving signal may be: a white pull-down signal, a seventh jitter signal, an eighth jitter signal, a sixth jitter signal, an electric field cancellation signal, a white push-up signal, and an electric field cancellation signal. In the following, the control method of the electronic ink screen is described in detail in conjunction with this example.

[0072] like Figure 7 As shown, the control method may include the following steps:

[0073] S101, obtaining a picture to be displayed.

[0074] Take the electronic ink display device 100 used as an electronic price tag as an example. The to-be-displayed screen of the electronic price tag can be considered as a screen that has been input into the electronic price tag but has not yet been displayed. Figure 8 The picture shown in (a) includes only black and white colors, that is, the picture to be displayed includes only black pixel data and white pixel data; it can also be as follows Figure 8 The picture shown in (b) includes three colors: black, white and color (for example, red), that is, the picture to be displayed includes black pixel data, white pixel data and color pixel data; it can also be as follows Figure 8 The picture shown in (c) includes two colors, white and color, that is, the picture to be displayed includes white pixel data and color pixel data; it can also be as follows Figure 8 The picture shown in (d) includes two colors, black and color, that is, the picture to be displayed includes black pixel data and color pixel data; of course, it can also be as follows Figure 8 The picture shown in (e) is a color picture (for example, a red picture is displayed in full screen), and the picture to be displayed includes color pixel data.

[0075] The picture to be displayed includes multiple pixel data, each of which can be composed of two bits of bit data, and the two bits of bit data determine the color displayed by the pixel corresponding to the pixel data in the electronic ink screen 1. Specifically, if the pixel corresponding to a pixel data displays black, the pixel data is called black pixel data, and correspondingly, white pixel data and color pixel data also have similar meanings. For example, the pixel data includes four forms: 00, 01, 10 and 11. Among them, 00 represents black pixel data; 01 represents white pixel data; 10 and 11 represent color pixel data, that is, when the first bit data of a pixel data is 1, the pixel data is color pixel data, otherwise the pixel data is black pixel data or white pixel data.

[0076] For example, the communication peer device 200 can send the image to be displayed to the electronic ink display device 100 through a wireless router or a wireless access point (AP) 300. In the electronic ink display device 100, Figure 5 The at least one processor 21 shown can receive the to-be-displayed picture through the communication device 3 and store it in at least one memory 22. Figure 6The second processor 21b in the display control device 2 can obtain the picture to be displayed through the communication device 3, and send the picture to be displayed to the first processor 21a. The first processor 21a receives the picture to be displayed and stores it in the second memory 22b.

[0077] Another example, Figure 5 At least one memory 22 shown may store one or more screens. For example, the screen may be a screen to be displayed that is pre-configured before the electronic display device leaves the factory. For another example, the screen may also be a template screen. For electronic price tags, the template screen may include a sub-screen that displays fixed content (i.e., non-adjustable content) and a sub-screen that displays variable content (i.e., adjustable content). The fixed content may include content applicable to different categories, such as supermarket names and discount reminders, and the variable content may include content such as category and price information. The sub-screen that displays variable content may be a white sub-screen. For example, Fig. 9 The template screen of a category of goods (e.g., red wine) is shown. The template screen can be read by at least one processor 21 as a to-be-displayed screen, so as to drive the electronic ink screen 1 to display the template screen in the subsequent steps. Of course, after at least one processor 21 receives the information including the to-be-displayed content sent by the communication peer device 200 through the communication device 3, the template screen can be updated according to the information of the variable content to generate a new to-be-displayed screen (e.g., Figure 8 The new picture to be displayed may also be stored in at least one memory 22 (eg, the second memory 22b).

[0078] Next, execute S102.

[0079] S102, outputting a black driving signal B to pixels to be displayed in black in the electronic ink screen, outputting a white driving signal W to pixels to be displayed in white in the electronic ink screen, and outputting a color driving signal C to pixels to be displayed in color in the electronic ink screen.

[0080] In more detail, when the picture to be displayed includes color pixel data, a color driving signal C is output to the pixel to be displayed in color in the electronic ink screen. Figure 8 When a color picture is shown in (b), (c), (d) or (e), a color driving signal C is output to the pixel to be displayed in color in the electronic ink screen.

[0081] Similarly, when the picture to be displayed includes black pixel data, a black driving signal B is output to the pixel to be displayed black in the electronic ink screen. Figure 8When the picture shown in (a), (b) or (d) is black, a black driving signal B is output to the pixel to be displayed in black in the electronic ink screen.

[0082] When the image to be displayed includes white pixel data, a white driving signal W is output to the pixel to be displayed in white in the electronic ink screen. Figure 8 When the picture shown in (a), (b) or (c) is white, a white driving signal W is output to the pixel to be displayed in white in the electronic ink screen.

[0083] The above-mentioned pixels to be displayed in black refer to pixels corresponding to black pixel data in the picture to be displayed, the pixels to be displayed in white refer to pixels corresponding to white pixel data in the picture to be displayed, and the pixels to be displayed in color refer to pixels corresponding to color pixel data in the picture to be displayed.

[0084] In the process of displaying the picture to be displayed, in order to synchronize the refresh process of the pixels of different colors to be displayed, such as Fig.10 or Fig.11 As shown, the duration T of the black driving signal B B , the duration T of the white driving signal W W And the duration T of the color driving signal C C Equal or approximately equal. The duration of the three being approximately equal means that the absolute value of the difference between any two of them is less than or equal to the preset value.

[0085] like Fig.10 or Fig.11 As shown, the black driving signal B, the white driving signal W and the color driving signal C all include sub-signals of multiple stages (i.e., N stages, N≥2). For example, N≥3; for example, N=7. For example, the durations of the sub-signals of the N stages may be the same or different. The embodiment of the present disclosure is illustrated by the sub-signal durations of at least two stages in the N stages being different.

[0086] In some embodiments, see Fig.10 or Fig.11 The color driving signal may include a first dithering signal C4 and a color first push-up signal C5 in adjacent phases, the color first push-up signal being in a phase subsequent to a phase corresponding to the first dithering signal.

[0087] For example, the color driving signal may include at least one stage of sub-signals in addition to the first jitter signal C4 and the color first push-up signal C5. For example, when N=7, the sub-signals of the first stage to the seventh stage included in the color driving signal are: electric field cancellation signal C1, color pull-down signal C2, second jitter signal C3, first jitter signal C4, color first push-up signal C5, electric field cancellation signal C6 and color second push-up signal C7.

[0088] The electric field cancellation signal C1 (or C6) is a signal that makes the electric field of the pixel zero, and the electric field cancellation signal C1 (or C6) is the same as the potential of the second electrode layer.

[0089] The color pull-down signal C2 is configured to drive the color particles in the pixel to move toward a side away from the display surface of the electronic ink screen to balance the movement of the color particles.

[0090] The second shaking signal C3 includes a second rectangular wave, and the frequency of the second rectangular wave is a second frequency, so as to make the colored particles oscillate in advance.

[0091] The first jitter signal C4 includes a first rectangular wave C41, an electric field cancellation signal C42, and a first constant voltage signal C43. The first rectangular wave C41 includes a first level signal C411 and a second level signal C412 arranged alternately. The frequency of the first rectangular wave C41 is a first frequency, wherein the first frequency is greater than the second frequency, so that the black particles and the color particles continue to swing, so that the black particles and the color particles are separated. The electric field cancellation signal C42 is a signal that makes the electric field in the pixel zero. The electric field cancellation signal C42 is the same as the potential of the second electrode layer, so that there is no voltage difference between the first electrode and the second electrode layer in the pixel, and at the same time, the black particles and the color particles in the pixel are further separated by inertia. The first constant voltage signal C43 is configured to drive the color particles in the pixel to move toward the side close to the display surface of the electronic ink screen. At this time, the black particles will also move toward the display surface. When the first constant voltage signal C43 is large enough, the picture can be completely black; compared with the stage corresponding to the electric field cancellation signal C42, the color particles are closer to the display surface at this time.

[0092] The first color push-up signal C5 is configured to drive the color particles in the pixel to move toward the side close to the display surface of the electronic ink screen. After being driven by the first color push-up signal C5, the color particles will move further toward the display surface to enhance the color display effect.

[0093] The color second push-up signal C7 is configured to drive the color particles in the pixel to move toward a side close to the display surface of the electronic ink screen, so that the pixel displays color.

[0094] Among them, the color first push-up signal C5 includes a black first pull-down sub-signal C51 and a color first push-up sub-signal C52, and the color second push-up signal C7 includes a black second pull-down sub-signal C71 and a color second push-up sub-signal C72. The black first pull-down sub-signal C51 and the black second pull-down sub-signal C71 are configured to pull the black particles down to a side farther from the display surface of the electronic ink screen than the color particles. The color first push-up sub-signal C52 and the color second push-up sub-signal C72 are configured to push the color particles and the black particles up at the same time. Since the mass of the black particles is less than the mass of the color particles (specifically, the volume of the black particles is less than the volume of the color particles), under the action of the same push-up signal, the black particles will run faster than the color particles. In order to prevent the black particles from running to a side closer to the display surface of the electronic ink screen than the color particles, the amplitudes of the color first push-up signal C52 and the color second push-up signal C72 are less than the amplitudes of the black push-up signal B7 and the white push-up signal W7. For example, the color first push-up signal C5 and the color second push-up signal C7 may be the same.

[0095] Specifically, the color first push-up signal C52 in the color first push-up signal C5 is a second constant voltage signal, and the voltage value of the second constant voltage signal is between the voltage value of the first level signal and the voltage value of the second level signal. The difference between the voltage value of the second constant voltage signal and CM is any voltage value in the range of 4 to 12V. For example, when HI is +15V, LO is -15V, and CM is 0V, the voltage value (which can be represented by RV) of the color first push-up signal C52 (i.e., the second constant voltage signal) can be any voltage value in the range of 4 to 12V, for example, it can be 12V. It should be noted here that the color second push-up signal C7 and the color first push-up signal C5 can be the same.

[0096] For example, the polarity of the charge carried by black particles and color particles is the same, and the mass of black particles is smaller than that of color particles. When the color first fader signal C52 acts on the color charged particles to move the color particles to the side close to the display surface of the electronic ink screen, it will also act on the black charged particles at the same time, causing the black charged particles to move to the side close to the display surface of the electronic ink screen, thereby causing black particles to be mixed with the color particles of the part of the electronic ink screen used to display color, thereby generating color difference. In order to solve this problem, the black particles and color particles are first layered through the black first pull-down signal C51, and the black particles are pulled down to the side of the display surface farther away from the electronic ink screen than the color particles; then, when the color first fader signal C52 acts on the color charged particles, even if it acts on the black particles at the same time, the black particles will be on the side farther away from the display surface of the electronic ink screen than the color particles, so that the black particles will not be mixed with the color particles.

[0097] In addition, after the pixel is driven by the first jitter signal C4, the black first pull-down sub-signal C51 in the color first push-up signal C5 can allow the black particles in the pixel to move downward faster than the color particles and move to the side of the color particles away from the display surface; and the color particles can continue to move to one side of the display surface under the drive of the second constant voltage signal, thereby presenting a better red display effect.

[0098] As an example, the above color driving signal C can be expressed as:

[0099] {CM,CM,CM,CM}, / / Sub-signal of the first stage

[0100] {LO,LO,LO,LO}, / / Sub-signal of the second stage

[0101] {HI,LO,HI,LO}, / / Sub-signal of the third stage

[0102] {HI,LO,CM,HI}, / / Sub-signal of the fourth stage

[0103] {LO,CM,Rv,CM}, / / Sub-signal of the fifth stage

[0104] {CM,CM,Rv,CM}, / / Sub-signal of the sixth stage

[0105] {LO,CM,Rv,CM}, / / Sub-signal of the seventh stage

[0106] Each row represents a cycle unit in a sub-signal of a stage, that is, a cycle unit includes the above four parts.

[0107] The duration (also called the number of frames) corresponding to the sub-signal of each stage is as follows. The last duration in each row is the number of repetitions (cycles) of the cyclic unit contained in the sub-signal of one stage, that is, the number of cycles of the four parts. The duration is represented by the number of unit durations, which can be a hexadecimal number. For example, the duration is 0x0a, which means 10 unit durations.

[0108] {0x0a,0x08,0x12,0x1a,0x01}, / / Sub-signal of the first stage

[0109] {0x04,0x04,0x04,0x04,0x02}, / / Sub-signal of the second stage

[0110] {0x06,0x08,0x06,0x08,0x0a}, / / Sub-signal of the third stage

[0111] {0x03,0x04,0x01,0x0d,0x01}, / / Sub-signal of the fourth stage

[0112] {0x04,0x00,0x16,0x06,0x09}, / / Sub-signal of the fifth stage

[0113] {0x08,0x08,0x00,0x00,0x09}, / / Sub-signal of the sixth stage

[0114] {0x03,0x00,0x1a,0x00,0x01}, / / Sub-signal of the seventh stage

[0115] Taking the sub-signal of the fourth stage (the first jitter signal C4) as an example, the four parts in one cycle unit include: a HI signal with a duration of 0x03, a LO signal with a duration of 0x04, a CM signal with a duration of 0x01, and a HI signal with a duration of 0x0d (d=13). And the cycle unit is repeated only once.

[0116] The electronic ink display is driven based on the color driving signal C in the above specific example, and the residual image in the displayed image is tested. Under normal temperature environment (between 22℃ and 30℃), the electronic ink display device is refreshed 10 times. Fig.12 The screen shown in (a) is refreshed every 30 seconds. Fig.12 The screen shown in (a) of FIG. 1 is shown; then, the screen is displayed Fig.12 The image shown in (b) is still, and an optical instrument (such as eyeone or 700D) is used to monitor the display. Fig.12 The image shown in (b) is optically measured to measure L*, a* and b* of 9 areas respectively, where L* is brightness, a* is red-green, b* is blue-yellow, △E * is the afterimage value.

[0117] Use the following formula to calculate the residual image in the red screen:

[0118]

[0119]

[0120] The data shown in Table 1 were obtained.

[0121] Table 1

[0122]

[0123] However, if the driving method in the related art is adopted, the data in Table 2 are obtained.

[0124] Table 2

[0125]

[0126] It can be seen that in the related art, under normal temperature environment, when testing the afterimage of the red screen, the brightness L* and the chromaticity a* will decrease, resulting in the afterimage value △E when the display of the black screen is switched to the display of the red screen. * R’B >0.5 and the afterimage value △E when the white screen is switched to the red screen * R’W >0.5 (preset range Spc: <0.5), resulting in poor display effect. However, the solution of this embodiment can improve the red brightness L* and chromaticity a*, and reduce the afterimage value △E * , so that △E * R’B and ∆E * R’W All of them are less than 0.5, that is, they all meet the requirements of the above preset range, and the afterimage value △E * The lower the value, the less obvious the residual image when switching from the previous display picture to the next display picture, and the better the corresponding display effect. Therefore, the solution of this embodiment can achieve a better display effect.

[0127] The first rectangular wave C41 in the first jitter signal C4 includes alternately arranged first level signals C411 and second level signals C412. For example, the voltage value of the first level signal C411 is HI, such as +15V; the voltage value of the second level signal C412 is LO, such as -15V.

[0128] In some embodiments of the present disclosure, the voltage value of the first constant voltage signal C43 is substantially equal to the voltage value of one of the first level signal C411 and the second level signal C412. Fig.10 For the electronic ink screen shown, when the colored particles in the pixel are positively charged and the second electrode 14 is closer to the display surface than the first electrode 13, the first constant voltage signal C43 can be 15±2V (ie, within the range of 13V to 17V), for example, can be +15V.

[0129] In some other embodiments of the present disclosure, the voltage value of the first constant voltage signal C43 is between the voltage value of the first level signal C411 and the voltage value of the second level signal C412. Fig.11In the electronic ink screen shown, the difference between the voltage value of the first constant voltage signal C43 and CM can be any voltage value between 4 and 12 V. When CM is 0 V, the voltage value of the first constant voltage signal C43 can be any voltage value between 4 and 12 V. For another example, the voltage value of the first constant voltage signal C43 can be equal to the voltage value RV of the first color up-fader signal C52 (i.e., the second constant voltage signal).

[0130] In some embodiments, reference Fig.10 or Fig.11 The black driving signal B includes sub-signals of multiple stages (ie, N stages, N≥2); the black driving signal B includes a third dithering signal B4, which is a sub-signal in the same stage as the first dithering signal C4 in the color driving signal C.

[0131] For example, the black driving signal B also includes at least one sub-signal other than the third dithering signal B4. Fig.10 or Fig.11 As shown, when N=7, the black drive signal B includes the sub-signals of the 1st stage to the 7th stage, which are: a black pull-down signal B1, a fourth jitter signal B2, a fifth jitter signal B3, a third jitter signal B4 and an electric field cancellation signal B5, a black push-up signal B6 and an electric field cancellation signal B7.

[0132] The black pull-down signal B1 is configured to drive the black charged particles in the pixel to move toward a side away from the display surface of the electronic ink screen to balance the movement of the black charged particles.

[0133] The fourth shaking signal B2 includes a fourth rectangular wave, and the frequency of the fourth rectangular wave is a fourth frequency. The fourth shaking signal B2 is configured to make the black charged particles perform pre-swing.

[0134] The fifth shaking signal B3 includes a fifth rectangular wave, the frequency of the fifth rectangular wave is a fifth frequency, and the fifth shaking signal is configured to make the black charged particles continue to shake.

[0135] The third jitter signal B4 includes: a third rectangular wave B41 and an electric field cancellation signal B42 arranged in sequence. The frequency of the third rectangular wave B4 is the third frequency, so that the black charged particles continue to swing, so that the black charged particles and the color charged particles are separated. The electric field cancellation signal B42 (or B6, B8) is a signal that makes the electric field of the pixel zero, so that the charged particles of each color can continue to move according to inertia and save the power used in the fourth stage.

[0136] The electric field cancellation signal B5 (or B7) is a signal that makes the electric field of the pixel zero.

[0137] The black push-up signal B6 is configured to drive the black charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen, so that the pixel displays black.

[0138] The third frequency of the third rectangular wave B41 in the third jittering signal B4 is greater than the fifth frequency of the fifth rectangular wave in the fifth jittering signal B3.

[0139] In some embodiments, reference Fig.10 or Fig.11 The white driving signal W includes sub-signals of multiple stages (ie, N stages, N≥2); the white driving signal W includes a sixth dithering signal W4, which is a sub-signal in the same stage as the first dithering signal C4 in the color driving signal C.

[0140] For example, the white driving signal W may further include at least one sub-signal other than the sixth dithering signal W4. Fig.10 or Fig.11 As shown, when N=7, the sub-signals of the first stage to the seventh stage included in the white driving signal W are: a white pull-down signal W1, a seventh dithering signal W2, an eighth dithering signal W3, a sixth dithering signal W4, an electric field cancellation signal W5, a white push-up signal W6 and an electric field cancellation signal W7.

[0141] The white pull-down signal W1 is configured to drive the white charged particles in the pixel to move toward a side away from the display surface of the electronic ink screen to balance the movement of the white charged particles.

[0142] The seventh dithering signal W2 includes a seventh rectangular wave, and the frequency of the seventh rectangular wave is a seventh frequency. The seventh dithering signal W2 is configured to cause the white charged particles to perform pre-swing.

[0143] The eighth shaking signal W3 includes an eighth rectangular wave, and the frequency of the eighth rectangular wave is an eighth frequency. The eighth shaking signal W3 is configured to make the white charged particles continue to shake.

[0144] The sixth jitter signal W4 includes: a sixth rectangular wave W41 and an electric field cancellation signal W42 arranged in sequence, wherein the frequency of the sixth rectangular wave is the sixth frequency to separate the black charged particles from the red charged particles. The electric field cancellation signal W42 is a signal that makes the electric field of the pixel zero.

[0145] The electric field cancellation signal W5 (or W7) is a signal that makes the electric field in the pixel zero, which is the same as the potential of the second electrode layer, so that there is no voltage difference between the first electrode and the second electrode layer in the pixel.

[0146] The white push-up signal W6 is configured to drive the white charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen, so that the pixel displays white.

[0147] The sixth frequency of the sixth rectangular wave W41 in the sixth jittering signal W4 is greater than the eighth frequency of the eighth rectangular wave in the eighth jittering signal W3 .

[0148] Among them, since the colored charged particles have a larger mass than the black charged particles, the effective duration of the color pull-down signal C2 is longer than that of the black pull-down signal B1 and the white pull-down signal W1, and the colored charged particles need to be pushed up twice, among which the duration of the color first push-up signal C5 is longer than that of the black push-up signal B7 and the white push-up signal W7, and the duration of the color second push-up signal C7 is also longer than that of the black push-up signal B7 and the white push-up signal W7.

[0149] In some embodiments of the present disclosure, the third frequency of the third rectangular wave B41 in the third jittering signal B4 is equal to the first frequency of the first rectangular wave C41 in the first jittering signal C4, and the fifth frequency of the fifth rectangular wave in the fifth jittering signal B3 is equal to the second frequency of the second rectangular wave in the second jittering signal C3, which can simplify the complexity of the driving process.

[0150] In some other embodiments of the present disclosure, the sixth frequency of the sixth rectangular wave W41 in the sixth jittering signal W4 is equal to the first frequency of the first rectangular wave C41 in the first jittering signal C4, and the eighth frequency of the eighth rectangular wave in the eighth jittering signal W3 is equal to the second frequency of the second rectangular wave in the second jittering signal C3, which can simplify the complexity of the driving process.

[0151] In some embodiments, the entire process of displaying a picture to be displayed can be divided into N display driving stages, and each display driving stage only inputs a sub-signal of the corresponding stage in each data driving signal to each pixel. Specifically, S102 may include the following steps:

[0152] In the I-th display drive stage of displaying the picture to be displayed, each row of pixels of the electronic ink screen 1 is scanned in sequence. For example, at least one processor 21 in the display control device 2 can control the gate driver 23 to output a scanning signal to each gate line of the electronic ink screen 1 row by row, that is, in order from the first row to the last row, each row of pixels is selected in sequence. Of course, the row scanning order is not limited to this. For example, it can also be to scan the pixels of the odd rows first, and then scan the pixels of the even rows. Among them, I≥1, indicating that I can be any stage. For example, when the three drive signals all include N stages, 1≤I≤N, that is, I=1, 2, 3,…, N.

[0153] Furthermore, the sub-signal of the first stage in the black driving signal B is output to the pixel to be displayed in black in each row of pixels scanned, the sub-signal of the first stage in the white driving signal W is output to the pixel to be displayed in white in each row of pixels scanned, and the sub-signal of the first stage in the color driving signal C is output to the pixel to be displayed in color in each row of pixels scanned. For example, at least one processor 21 in the display control device 2 can control the source driver 24 to output a corresponding sub-signal to each row of pixels scanned, for example, if in the second display driving stage, the sub-signal W2 in the white driving signal W is output to the pixel to be displayed in white, the sub-signal B2 in the black driving signal B is output to the pixel to be displayed in black, and the sub-signal C2 in the color driving signal C is output to the pixel to be displayed in color.

[0154] It can be seen that in this embodiment, when refreshing a color picture (including pictures of three colors: black, white and color), it is necessary to go through N display driving stages, and each display driving stage needs to scan each row of pixels and output the sub-signal corresponding to the display driving stage to each row of pixels. In this way, when the number of sub-signals included in the data driving signal changes, there is no need to change the scanning signal and the related clock signal, etc.

[0155] In other embodiments, each row of pixels may be scanned row by row, and when a row of pixels is scanned, a corresponding data drive signal (including N sub-signals) is output to each pixel in the row of pixels; then, the next row of pixels is scanned.

[0156] In some embodiments, the display control device 2 may store a waveform file LUT WF_B of a black driving signal B, a waveform file LUT WF_W of a white driving signal W, and a waveform file LUT WF_C of a color driving signal C. The waveform file is used to represent Figure 7 The data shown is the data of the driving signal. For example, see Figure 5 , each waveform file can be stored in at least one memory 22 of the display control device 2. At least one processor 21 in the display control device 2 can control the source driver 24 to output corresponding data drive signals to each pixel according to the picture to be displayed stored in at least one memory 22 and each waveform file stored in at least one memory 22. In more detail, according to the stored black waveform file LUT WF_B, the black drive signal corresponding to LUT WF_B is output to the pixel to be displayed black; according to the stored white waveform file LUTWF_W, the white drive signal corresponding to LUT WF_W is output to the pixel to be displayed white; and according to the stored color waveform file LUT WF_C, the color drive signal corresponding to LUT WF_C is output to the pixel corresponding to the color pixel data in the picture to be displayed.

[0157] It should be noted that there can be at least two LUT WF_B, LUT WF_W and LUT WF_C, corresponding to different temperatures respectively. For example, according to the temperature sensed by the temperature sensor 25, the waveform files (including: LUT WF_B, LUT WF_W and LUT WF_C) corresponding to the sensed temperature can be found from at least one memory 22, and the corresponding data drive signal can be output to each pixel according to these waveform files. In this way, the data drive signal can be adjusted accordingly according to the temperature so as to display a satisfactory picture.

[0158] In some embodiments, the display control device and the like can be divided into functional modules according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0159] like Figure 5 As shown, some embodiments of the present disclosure further provide a display control device 2. The functions that can be implemented by the display control device 2 can be specifically referred to the above embodiments, and will not be elaborated here.

[0160] The display control device 2 includes: a source driver 24 and at least one processor 21. The at least one processor 21 is configured to control the source driver 24 to input a first color driving signal to a pixel to be displayed in a first color in the electronic ink screen; wherein the first color driving signal includes sub-signals of multiple stages, and the sub-signals of multiple stages include a first jitter signal and a first color first push-up signal in adjacent stages, and the first color first push-up signal is in a stage after the stage corresponding to the first jitter signal.

[0161] The first jitter signal includes: a first rectangular wave, an electric field cancellation signal and a first constant voltage signal arranged in sequence, and the first constant voltage signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen;

[0162] The first push-up signal of the first color is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen.

[0163] In some embodiments, at least one processor 21 is further configured to control the source driver 24 to input a second color driving signal to pixels in the electronic ink screen that are to display a second color.

[0164] The second color driving signal includes sub-signals of multiple stages; the sub-signal in the second color driving signal that is in the same stage as the first dithering signal is the third dithering signal, and the third dithering signal includes: a third rectangular wave and an electric field cancellation signal arranged in sequence.

[0165] In some embodiments, at least one processor 21 is further configured to control the source driver 24 to input a third color driving signal to pixels in the electronic ink screen that are to display a third color.

[0166] The third color driving signal includes sub-signals of multiple stages; the sub-signal in the third color driving signal that is in the same stage as the first dithering signal is the sixth dithering signal, and the sixth dithering signal includes: a sixth rectangular wave and an electric field cancellation signal arranged in sequence.

[0167] In some embodiments, the display control device 2 further includes: a gate driver.

[0168] At this time, at least one processor 21 is configured to control the gate driver to scan each row of pixels of the electronic ink screen in sequence in the Ith display driving stage of displaying the image to be displayed; and control the source driver 24 to output the Ith stage sub-signal of the second color drive signal to the pixels to be displayed in each row of pixels scanned, and to output the Ith stage sub-signal of the third color drive signal to the pixels to be displayed in each row of pixels scanned, and to output the Ith stage sub-signal of the first color drive signal to the pixels to be displayed in each row of pixels scanned; wherein, I≥1, and the second color drive signal, the third color drive signal and the first color drive signal include the same number of stages.

[0169] In some embodiments, the display control device 2 further includes: at least one memory 22, wherein the at least one memory 22 is configured to store the second color waveform file, the third color waveform file, and the first color waveform file.

[0170] At this time, at least one processor 21 is also configured to output a third color driving signal corresponding to the third color waveform file to the pixel to be displayed the third color according to the stored third color waveform file; and to output a first color driving signal corresponding to the first color waveform file to the pixel to be displayed the first color according to the stored first color waveform file.

[0171] The at least one memory 22 is further configured to store pictures to be displayed.

[0172] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a processor, a computer (e.g., an electronic ink display device) executes one or more steps in the method for controlling an electronic ink screen as described in any of the above embodiments.

[0173] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, including and / or carrying instructions and / or data.

[0174] Some embodiments of the present disclosure further provide a computer program product, which includes computer program instructions, and when the computer program instructions are executed on a computer, the computer program instructions cause the computer to execute one or more steps in the control method of the electronic ink screen as described in the above embodiments.

[0175] Some embodiments of the present disclosure further provide a computer program. When the computer program is executed on a computer, the computer program enables the computer to execute one or more steps in the control method of the electronic ink screen as described in the above embodiments.

[0176] The beneficial effects of the above-mentioned computer-readable storage medium, computer program product and computer program are the same as the beneficial effects of the control method of the electronic ink screen described in some of the above-mentioned embodiments, and will not be repeated here.

[0177] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any person skilled in the art within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for controlling an electronic ink screen, wherein the electronic ink screen comprises a plurality of pixels, at least one pixel comprises charged particles of a first color, and the method for controlling the electronic ink screen comprises: Inputting a first color driving signal to pixels of the electronic ink screen to display a first color; The first color driving signal includes sub-signals of multiple stages, the sub-signals of the multiple stages include a first shaking signal and a first color first push-up signal in adjacent stages, and the first color first push-up signal is in a stage subsequent to the stage corresponding to the first shaking signal; The first jitter signal includes: a first rectangular wave, an electric field cancellation signal and a first constant voltage signal arranged in sequence, and the first constant voltage signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The first color first push-up signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The first color driving signal includes sub-signals of seven stages, wherein the sub-signals of the first stage to the seventh stage included in the first color driving signal are sequentially: The electric field cancels the signal; A first color pull-down signal is configured to drive the first color charged particles in the pixel to move toward a side away from the display surface of the electronic ink screen; A second jitter signal includes a second rectangular wave, wherein the frequency of the second rectangular wave is a second frequency; The first jitter signal, the frequency of the first rectangular wave is a first frequency; the first color first push-up signal; The electric field cancels the signal; A first color second push-up signal, wherein the first color second push-up signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The first frequency is greater than the second frequency.

2. The control method of the electronic ink screen according to claim 1, wherein the first rectangular wave comprises a first level signal and a second level signal arranged alternately; The first constant voltage signal has substantially the same voltage value as one of the first level signal and the second level signal, or the first constant voltage signal has a voltage value between the first level signal and the second level signal.

3. The control method of the electronic ink screen according to claim 2, wherein the first color first push-up signal comprises: a second constant voltage signal, wherein a voltage value of the second constant voltage signal is between a voltage value of the first level signal and a voltage value of the second level signal; When the voltage value of the first constant voltage signal is between the voltage value of the first level signal and the voltage value of the second level signal, the voltage value of the first constant voltage signal is equal to the voltage value of the second constant voltage signal.

4. According to the control method of the electronic ink screen according to claim 1, at least one pixel also includes a second color charged particle and a third color charged particle, the first color charged particle and the second color charged particle have the same charge, the first color charged particle and the third color charged particle have opposite charge, and the mass of the first color charged particle is greater than the mass of the second color charged particle.

5. The control method of the electronic ink screen according to claim 1, further comprising: Inputting a second color driving signal to pixels in the electronic ink screen to display a second color; Among them, the second color driving signal includes sub-signals of multiple stages; the sub-signal in the second color driving signal that is in the same stage as the first dithering signal is a third dithering signal, and the third dithering signal includes: a third rectangular wave and an electric field cancellation signal arranged in sequence.

6. The control method of the electronic ink screen according to claim 5, wherein the second color driving signal comprises sub-signals of seven stages, wherein: The second color driving signal includes the sub-signals of the first stage to the seventh stage, which are: A second color pull-down signal is configured to drive the second color charged particles in the pixel to move toward a side away from the display surface of the electronic ink screen; a fourth jitter signal, comprising a fourth rectangular wave; a fifth jitter signal, comprising a fifth rectangular wave, wherein the frequency of the fifth rectangular wave is a fifth frequency; The third jitter signal, the frequency of the third rectangular wave is a third frequency; The electric field cancels the signal; A second color push-up signal is configured to drive the second color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The electric field cancels the signal; Wherein, the third frequency is greater than the fifth frequency.

7. The control method of the electronic ink screen according to claim 6, wherein: The third frequency is equal to the first frequency, and the fifth frequency is equal to the second frequency.

8. The method for controlling the electronic ink screen according to claim 1, further comprising: Inputting a third color driving signal to pixels in the electronic ink screen that are to display a third color; Among them, the third color driving signal includes sub-signals of multiple stages; the sub-signal in the third color driving signal that is in the same stage as the first dithering signal is the sixth dithering signal, and the sixth dithering signal includes: a sixth rectangular wave and an electric field cancellation signal arranged in sequence.

9. The control method of the electronic ink screen according to claim 8, wherein the third color driving signal comprises sub-signals of seven stages, wherein: The third color driving signal includes the sub-signals of the first stage to the seventh stage, which are: A third color pull-down signal is configured to drive the third color charged particles in the pixel to move to a side away from the display surface of the electronic ink screen; a seventh jitter signal, the seventh jitter signal comprising a seventh rectangular wave; an eighth jitter signal, the eighth jitter signal comprising an eighth rectangular wave, and a frequency of the eighth rectangular wave is an eighth frequency; The sixth jitter signal, the frequency of the sixth rectangular wave is a sixth frequency; The electric field cancels the signal; A third color push-up signal is configured to drive the third color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The electric field cancels the signal; Wherein, the sixth frequency is greater than the eighth frequency.

10. The control method of the electronic ink screen according to claim 9, wherein: The sixth frequency is equal to the first frequency, and the eighth frequency is equal to the second frequency.

11. The control method of the electronic ink screen according to claim 1, wherein: In a case where the colors in the picture to be displayed include the second color, the third color, and the first color, outputting a second color driving signal to a pixel in the electronic ink screen that is to display the second color, outputting a third color driving signal to a pixel in the electronic ink screen that is to display the third color, and outputting a first color driving signal to a pixel in the electronic ink screen that is to display the first color, comprises: In the Ith display drive stage of displaying the image to be displayed, each row of pixels of the electronic ink screen is scanned in sequence; the sub-signal of the Ith stage in the second color drive signal is output to the pixels to be displayed in the second color in each scanned row of pixels, the sub-signal of the Ith stage in the third color drive signal is output to the pixels to be displayed in the third color in each scanned row of pixels, and the sub-signal of the Ith stage in the first color drive signal is output to the pixels to be displayed in the first color in each scanned row of pixels; wherein, I≥1, and the second color drive signal, the third color drive signal and the first color drive signal include the same number of stages.

12. The method for controlling an electronic ink screen according to any one of claims 1 to 11, wherein: In the case where each of the pixels includes charged particles of the second color, charged particles of the third color, and charged particles of the first color, outputting a second color driving signal to a pixel in the electronic ink screen to display the second color, outputting a third color driving signal to a pixel in the electronic ink screen to display the third color, and outputting a first color driving signal to a pixel in the electronic ink screen to display the first color, comprises: According to the stored second color waveform file, outputting a second color driving signal corresponding to the second color waveform file to the pixel to be displayed with the second color; According to the stored third color waveform file, outputting a third color driving signal corresponding to the third color waveform file to the pixel to be displayed with the third color; According to the stored first color waveform file, a first color driving signal corresponding to the first color waveform file is output to the pixel to display the first color.

13. A display control device, comprising: Source driver; At least one processor is configured to control the source driver to input a first color driving signal to a pixel to be displayed in a first color in the electronic ink screen; wherein the first color driving signal includes sub-signals of multiple stages, the sub-signals of the multiple stages include a first jitter signal and a first color first push-up signal in adjacent stages, and the first color first push-up signal is in a stage after the stage corresponding to the first jitter signal; The first jitter signal includes: a first rectangular wave, an electric field cancellation signal and a first constant voltage signal arranged in sequence, and the first constant voltage signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The first color first push-up signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The first color driving signal includes sub-signals of seven stages, wherein the sub-signals of the first stage to the seventh stage included in the first color driving signal are sequentially: The electric field cancels the signal; A first color pull-down signal is configured to drive the first color charged particles in the pixel to move toward a side away from the display surface of the electronic ink screen; A second jitter signal includes a second rectangular wave, wherein the frequency of the second rectangular wave is a second frequency; The first jitter signal, the frequency of the first rectangular wave is a first frequency; the first color first push-up signal; The electric field cancels the signal; A first color second push-up signal, wherein the first color second push-up signal is configured to drive the first color charged particles in the pixel to move toward a side close to the display surface of the electronic ink screen; The first frequency is greater than the second frequency.

14. The display control device according to claim 13, characterized in that: The at least one processor is further configured to control the source driver to input a second color driving signal to pixels in the electronic ink screen that are to display a second color; Among them, the second color driving signal includes sub-signals of multiple stages; the sub-signal in the second color driving signal that is in the same stage as the first dithering signal is a third dithering signal, and the third dithering signal includes: a third rectangular wave and an electric field cancellation signal arranged in sequence.

15. The display control device according to claim 14, characterized in that: The at least one processor is further configured to control the source driver to input a third color driving signal to pixels in the electronic ink screen that are to display a third color; Among them, the third color driving signal includes sub-signals of multiple stages; the sub-signal in the third color driving signal that is in the same stage as the first dithering signal is the sixth dithering signal, and the sixth dithering signal includes: a sixth rectangular wave and an electric field cancellation signal arranged in sequence.

16. The display control device according to claim 15, further comprising: Gate driver; The at least one processor is configured to control the gate driver to scan each row of pixels of the electronic ink screen in sequence during the Ith display driving stage of displaying the image to be displayed; and control the source driver to output the sub-signal of the Ith stage in the second color drive signal to the pixels to be displayed in each scanned row of pixels of the second color, to output the sub-signal of the Ith stage in the third color drive signal to the pixels to be displayed in each scanned row of pixels of the third color, and to output the sub-signal of the Ith stage in the first color drive signal to the pixels to be displayed in each scanned row of pixels of the first color; wherein I≥1, and the second color drive signal, the third color drive signal and the first color drive signal include the same number of stages.

17. The display control device according to any one of claims 13 to 16, further comprising: at least one memory configured to store the second color waveform file, the third color waveform file, and the first color waveform file; The at least one processor is also configured to output a third color driving signal corresponding to the third color waveform file to pixels to be displayed with a third color according to the stored third color waveform file; and to output a first color driving signal corresponding to the first color waveform file to pixels to be displayed with a first color according to the stored first color waveform file.

18. An electronic ink display device, comprising: An electronic ink display screen, the electronic ink screen comprising a plurality of pixels, at least one pixel comprising charged particles of a first color; as well as, The display control device according to any one of claims 13 to 17.

19. A computer-readable storage medium storing computer program instructions, wherein when the computer program instructions are executed on an electronic ink display device, the electronic ink display device executes the method for controlling the electronic ink screen according to any one of claims 1 to 12.

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