CN115578982B

CN115578982B - Display driving circuit, electronic paper and refreshing driving method thereof

Info

Publication number: CN115578982B
Application number: CN202211343012.5A
Authority: CN
Inventors: 唐豪; 康报虹
Original assignee: HKC Co Ltd; Chongqing HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Chongqing HKC Optoelectronics Technology Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-11-10
Anticipated expiration: 2042-10-31
Also published as: CN115578982A

Abstract

The application relates to a display driving circuit, electronic paper and a refreshing driving method thereof. The detection module of the display driving circuit reads and determines the time for executing the intermediate instruction according to the driving waveform table data, and sets an auxiliary mark at the previous stage of the time. The control module executes an intermediate instruction when the auxiliary mark is read, and the intermediate instruction comprises a scanning signal at a second potential and a data signal with a specific voltage value, which are output by the control module, to the driving circuit. The driving circuit drives the bottom electrode of the electronic paper to be at a preset voltage value. In the display driving circuit, the charge is released in the previous stage of the switching of the reflective color of the capsule, so that the voltage change degree of the bottom electrode in the switching of the reflective color of the capsule is reduced, and the power consumption caused by the voltage change in the switching of the color is effectively reduced.

Description

Display driving circuit, electronic paper and refreshing driving method thereof

Technical Field

The present application relates to the field of display technologies, and in particular, to a display driving circuit, an electronic paper, and a refresh driving method for the electronic paper.

Background

With the development of electronic displays, electronic paper (E-paper) is widely used in modern electronic displays due to its low energy consumption, light weight, thin thickness, etc. The electronic paper is also called an electronic ink screen and is mainly used for application scenes such as electronic price tags, electronic table cards, electronic books and the like. Since electronic paper is usually powered by a battery, the power consumption of the electronic paper is one of important evaluation indexes of the performance of the electronic paper.

In order to obtain a better display effect, the driving system of the electronic paper can provide positive and negative voltages which are switched repeatedly, so that the picture is switched to be full black and full white. However, when the positive and negative voltages in the electronic paper are repeatedly switched, the opposite charges in the data capacitor need to be neutralized first, and then the target voltage value is reached, so that the voltage change is large, and further large power consumption and loss exist.

Disclosure of Invention

In view of the shortcomings of the prior art, an object of the present application is to provide a display driving circuit, which releases charges in a previous stage of switching of the reflective color of a capsule, so that the voltage variation degree of a bottom electrode in switching of the reflective color of the capsule is reduced, and thus the power consumption caused by the voltage variation in switching of the color is effectively reduced.

In a first aspect, the present application provides a display driving circuit for electronic paper. The display driving circuit comprises a storage module, a control module electrically connected with the storage module, and a driving circuit electrically connected with the control module, and further comprises a detection module, wherein the detection module is electrically connected with the storage module, and is used for reading driving waveform table data pre-stored in the storage module, determining the time for executing an intermediate instruction according to the driving waveform table data, and setting an auxiliary mark in the previous stage of the time; the control module is used for executing the intermediate instruction when the auxiliary mark is read, wherein the intermediate instruction comprises a scanning signal which controls the control module to output a second potential and a data signal with a specific voltage value to the driving circuit; the driving circuit is used for driving the bottom electrode of the electronic paper to be at a preset voltage value.

In some embodiments, the display driving circuit further includes a plurality of scan lines extending in a first direction and a plurality of data lines extending in a second direction, each of intersections of the scan lines and the data lines being correspondingly provided with the driving circuit, wherein the first direction and the second direction are perpendicular to each other; the driving circuit comprises switch components, wherein the control end of each switch component is used for receiving the scanning signals from the corresponding scanning lines, the first end of each switch component is used for receiving the data signals from the corresponding data lines, and the second end of each switch component is electrically connected to the corresponding bottom electrode.

In some embodiments, the driving circuit is configured to selectively control the data signal to be transmitted to the bottom electrode according to the received scan signal, and control the bottom electrode to be at different preset voltage values; when the scanning signal is at a first potential, the scanning signal controls the switch assembly to be in an off state; when the scanning signal is at a second potential, the scanning signal controls the switch assembly to be in a closed state, and the data signal is transmitted to the bottom electrode.

In some embodiments, the detection module includes a data reading unit, a change table generating unit electrically connected to the data reading unit, and a marking unit electrically connected to the change table generating unit, where the data reading unit and the marking unit are further electrically connected to the storage module, respectively, and the data reading unit is configured to read the driving waveform table data stored in the storage module; the change table generation unit is used for reading the driving waveform table data and forming a picture display change table according to the driving waveform table data, wherein the picture display change table contains time sequence information representing color switching of capsules in the electronic paper; the marking unit is used for setting the auxiliary mark for the previous stage of color switching in the driving waveform table data according to the picture display change table.

In some embodiments, the change table generating unit reads the driving waveform table data, and if the data information of the driving waveform table data at the same time is the same and the corresponding display color is the first color, the time correspondence is recorded as 01; if the data information of the driving waveform table data at the same time is the same and the corresponding display color is the second color, the time correspondence is marked as 10; the remaining time corresponds to 00 to form the screen display change table.

In a second aspect, the present application further provides an electronic paper, where the electronic paper includes a common electrode layer, a plurality of capsules, a supporting layer, and a plurality of bottom electrodes, where the bottom electrodes are disposed on a surface of one side of the supporting layer, a preset distance between the common electrode layer and the bottom electrodes is set on a side of the bottom electrodes away from the supporting layer, the plurality of capsules are disposed between the common electrode layer and the bottom electrodes, and a plurality of charged particles and transparent dispersion media are distributed in the capsules, and the transparent dispersion media is used to suspend the charged particles inside the capsules.

In some embodiments, the preset voltage value corresponding to the capsule displaying the first color is a first voltage, the preset voltage value corresponding to the capsule displaying the second color is a second voltage, and the first voltage and the second voltage are different.

In some embodiments, the electronic paper further includes a protective layer disposed on a surface of the common electrode layer opposite to the bottom electrode.

In a third aspect, the present application further provides a refresh driving method, including:

reading the driving waveform table data stored in the storage module through a data reading unit;

Forming a picture display change table according to the driving waveform table data by a change table generating unit;

setting auxiliary marks for the previous stage of switching different colors in the driving waveform table data according to the picture display change table through a marking unit;

and reading the driving waveform table data by a control module and executing an intermediate instruction when the auxiliary mark is read.

In summary, in the display driving circuit, the electronic paper and the refresh driving method of the present application, the detection module is disposed in the display driving circuit, and in the previous stage of switching the reflective color of the capsule, the storage module and the control module are matched to adjust the switch component of the driving circuit to be in an on state and transmit the data signal with a specific voltage value to the driving circuit, so as to reduce the voltage variation degree of the bottom electrode during switching the reflective color of the capsule, thereby effectively reducing the power consumption caused by the voltage variation during switching the color. Meanwhile, the time for executing the intermediate instruction is extremely short, so that the refreshing frequency of the electronic paper is not influenced.

Drawings

Fig. 1 is a schematic structural diagram of an electronic paper according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a portion of a display driving circuit according to an embodiment of the present application;

FIG. 3 is a timing control diagram of a display driving circuit disclosed in the prior art;

FIG. 4 is a diagram of a portion of drive waveform table data according to an embodiment of the present application;

FIG. 5 is another portion of the driving waveform table data according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a display driving circuit according to an embodiment of the present application;

fig. 7 is a flow chart of a refresh driving method according to an embodiment of the present application.

Reference numerals illustrate:

100-electronic paper; 110-a protective layer; 120-a common electrode layer; 130-capsules; 140-a support layer; 150-a bottom electrode; 132-first charged particles; 134-second charged particles; 136-a transparent dispersion medium; 15-a switch assembly; 200-a display driving circuit; 10-a detection module; a 20-memory module; 30-a control module; 40-a driving circuit; 12-a data reading unit; 14-a change table generation unit; 16-a marking unit; s1-an incident light path; s2-a first reflection light path; s3-a second reflection light path; scan 1-Scan n-Scan lines; data 1-Data m-Data lines; f1-a first direction; f2-a second direction; a Data-Data signal; scan-Scan signal; VSH-first voltage; VSL-a second voltage; GND-third voltage; group1 to Group 6-first Group to sixth Group; adress (Hex) -a first portion of the memory address of the execution content; name-the Name of the execution item; the lumdww-execution item is from the second color to the second color; LUTBW-execution item is from first color to second color; LUTWB-execution item from second color to first color; LUTBB-execution item is from first color to first color; S10-S40-step of a refresh driving method.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the application. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present application are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. It should be noted that the terms "step 1", "step 2", and the like in the description and the claims of the present application and the drawings are used for distinguishing between different objects and not for describing a particular sequential order. The terms first, second and the like in the description and in the claims and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprises," "comprising," "includes," "including," or "having," when used in this specification, are intended to specify the presence of stated features, operations, elements, etc., but do not limit the presence of one or more other features, operations, elements, etc., but are not limited to other features, operations, elements, etc. Furthermore, the terms "comprises" or "comprising" mean that there is a corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, and that there is no intention to exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. It will also be understood that the meaning of "at least one" as described herein is one and more, such as one, two or three, etc., and the meaning of "a plurality" is at least two, such as two or three, etc., unless specifically defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic paper 100 according to an embodiment of the application. As shown in fig. 1, the electronic paper 100 provided in the embodiment of the present application displays by using electronic ink, it can be understood that the display principle of the electronic ink technology is to encapsulate charged particles with multiple colors in a microcapsule structure, and to control the charged particles with different charges to move up and down by an applied electric field, so as to display multiple single colors, and under the action of the electric field, the particles with multiple different colors move continuously, so as to display different display pictures. For example, the charged particles of plural colors may be charged black particles and charged white particles, when the charged white particles rise to the upper surface, all the ambient light is completely reflected on the upper surface, the charged white particles are in a white state corresponding to the picture position, and similarly, when the charged black particles rise to the upper surface, all the ambient light is completely absorbed on the upper surface, the charged black particles are in a black state corresponding to the picture position.

In an embodiment of the present application, the electronic paper 100 may at least include a protective layer 110, a common electrode layer 120, a plurality of capsules 130, a support layer 140, and a plurality of bottom electrodes 150. The bottom electrode 150 is disposed on a side surface of the supporting layer 140, the common electrode layer 120 is disposed at a preset distance from a side of the bottom electrode 150 away from the supporting layer 140, a plurality of the capsules 130 are disposed between the common electrode layer 120 and the bottom electrode 150, that is, the common electrode layer 120 and the bottom electrode 150 are disposed on opposite sides of the plurality of the capsules 130, and a gap is formed between the common electrode layer 120 and the bottom electrode 150 and the capsules 130, and the protective layer 110 is disposed on a side surface of the common electrode layer 120 opposite to the bottom electrode 150.

In an embodiment of the present application, the capsule 130 may be a closed micro liquid capsule, and a large number of micro liquid capsules with very small size form an electronic ink and are filled between the common electrode layer 120 and the bottom electrode 150. The capsule 130 is internally provided with a plurality of charged particles and a transparent dispersion medium, wherein the transparent dispersion medium is used for suspending the charged particles in the capsule 130.

In an embodiment of the present application, the bottom electrode 150 may be a pixel electrode, which is not particularly limited in the present application.

The display control circuit of the electronic paper 100 controls the bottom electrode 150 to be at different preset voltage values, so as to drive the charged particles in the capsule 130 to move correspondingly in the transparent dispersion medium of the capsule 130 under the action of the electric field force and then to be at different positions.

In embodiments of the present application, the charged particles are made of charged pigments, which are referred to as charged ink droplets because they are used in electronic paper, i.e., electronic ink screens.

Next, the embodiment of the present application will be described by taking as an example that two kinds of charged particles are distributed in the capsule 130, that is, a plurality of first charged particles 132 and a plurality of second charged particles 134 are distributed in the capsule 130.

As shown in fig. 1, a plurality of the capsules 130 are disposed between the common electrode layer 120 and the bottom electrode 150, and the capsules 130 are integrally formed as sealed spheres, and are internally encapsulated with a plurality of first charged particles 132, a plurality of second charged particles 134, and a transparent dispersion medium 136. Wherein the first charged particles 132 and the second charged particles 134 are two kinds of particles having different charges. For example, the first charged particles 132 are positively charged, the second charged particles 134 are negatively charged, or the first charged particles 132 are negatively charged and the second charged particles 134 are positively charged. Further, the first charged particles 132 and the second charged particles 134 are completely immersed in the transparent dispersion medium 136 and can freely move within the transparent dispersion medium 136. When the electrodes at both ends of the capsules 130 form an electric field, the first charged particles 132, which are positively (or negatively) charged, and the second charged particles 134, which are negatively (or positively) charged, move correspondingly under the effect of the electric field, and each of the capsules 130 is black or white on the side close to the common electrode layer 120, and finally all of the capsules 130 form a certain image together on the side of the common electrode layer 120.

A plurality of the first charged particles 132 and a plurality of the second charged particles 134 are disposed within the capsule 130. Meanwhile, the capsule 130 is further filled with a transparent dispersion medium 136, and the transparent dispersion medium 136 is used for suspending the plurality of first charged particles 132 and the plurality of second charged particles 134 inside the capsule 130.

The display driving circuit 200 of the electronic paper 100 changes the electric field formed by the electrodes at the two ends of the capsule 130 by controlling the voltage value of the bottom electrode 150, so as to drive the first charged particles 132 and the second charged particles 134 to move in the capsule 130 by attraction or repulsion and then to be at different positions, so as to reflect the light rays of different colors.

In a specific embodiment of the present application, the first charged particles 132 may be negatively charged black pigments, i.e., the first charged particles 132 may be black particles; the second charged particles 134 may be positively charged white pigments, i.e., the second charged particles 134 may be white particles, which is not particularly limited in the present application.

In an embodiment of the present application, the common electrode layer 120 may be a transparent electrode, and in particular, the transparent electrode may be made of indium tin metal oxide (Indium Tin Oxides, ITO), which is not particularly limited by the present application.

As shown in fig. 1, S1 is an incident light path S1 of light incident on the first charged particles 132 and the second charged particles 134, and S2 is a first reflected light path S2 of first reflected light formed by reflecting incident light on the first charged particles 132. S3 is a second reflected light path S3 of the second reflected light beam formed by the incident light beam being reflected by the second charged particles 134.

In the embodiment of the present application, the first reflected light beam formed by the incident light beam incident on the first charged particles 132 is of the first color, and the second reflected light beam formed by the incident light beam incident on the second charged particles 134 is of the second color.

In a specific embodiment of the present application, the first charged particles 132 may be negatively charged black pigments and the second charged particles 134 may be positively charged white pigments. At this time, the first reflected light beam reflected by the first charged particles 132 is black, i.e. the first color is black, and the second reflected light beam reflected by the second charged particles 134 is white, i.e. the second color is white.

In other embodiments of the present application, the electronic paper 100 may include three kinds of charged particles, namely, a first charged particle 132, a second charged particle 134 and a third charged particle (not shown), where an incident light is incident on the third charged particle and a third reflected light formed by reflection of the third charged particle is of a third color.

In other embodiments of the present application, the third charged particles may be positively charged red pigments, and the incident light is incident on the third reflective light formed by reflection of the third charged particles and is red. That is, the third color is red.

Referring to fig. 2 together, fig. 2 is a schematic diagram illustrating a portion of a display driving circuit 200 according to an embodiment of the application.

As shown in fig. 2, in the embodiment of the present application, the electronic paper 100 further includes a display driving circuit 200 for controlling each of the bottom electrodes 150 to be at a preset voltage value. The display driving circuit 200 includes a plurality of Scan lines (Scan lines) Scan 1, scan 2, …, scan n-1, scan n arranged in a grid shape and extending along a first direction F1, and a plurality of Data lines (Data lines) Data 1, … Data m-1, data m extending along a second direction F2. The first direction F1 and the second direction F2 are perpendicular to each other, and the plurality of scan lines, the plurality of data lines, and the scan lines and the data lines are insulated from each other. That is, the plurality of scan lines are arranged at intervals along the second direction F2 and are insulated from each other, the plurality of data lines are arranged at intervals along the first direction F1 and are insulated from each other, and the plurality of scan lines and the plurality of data lines are insulated from each other. Wherein m and n are both positive integers, which are not particularly limited in the present application.

The drive circuit 40 is provided corresponding to each intersection of the plurality of scanning lines and the data line. Specifically, the driving circuit 40 is disposed between any two adjacent scanning lines and any two adjacent data lines, the driving circuits 40 located in the same column are all electrically connected with the same data line, and the driving circuits 40 located in the same row are all electrically connected with the same scanning line. In the embodiment of the present application, the plurality of driving circuits 40 are distributed in an array.

In other embodiments of the present application, each of the capsules 130 may be controlled by two driving circuits 40, i.e., two of the bottom electrodes 150 for each of the capsules 130. The two driving circuits 40 can respectively control the preset voltage values of the two bottom electrodes 150, and further respectively control a plurality of charged particles disposed inside the capsule 130 at positions corresponding to the two bottom electrodes 150.

As shown in fig. 2, the driving circuit 40 includes a switch assembly 15, where the switch assembly 15 includes a control end, a first end and a second end, and the control end of each switch assembly 15 is electrically connected to a corresponding Scan line for receiving a Scan signal Scan. The first end of each switch assembly 15 is electrically connected to the corresponding Data line for receiving a Data signal Data, and the second end of each switch assembly 15 is electrically connected to the corresponding bottom electrode 150. In other words, the control end of the switch element 15 of each of the driving circuits 40 in the same column is electrically connected to the same scan line, and the first end of the switch element 15 of each of the driving circuits 40 in the same row is electrically connected to the same data line.

In the embodiment of the present application, the Scan signal Scan is transmitted to the control end of the switch assembly 15 through the Scan line, and the Scan signal Scan controls the switch assembly 15 to be in an on or off state. The Data signal Data is transmitted to the first terminal of the switching element 15 through the Data line. The switch assembly 15 is used for controlling the Data signal Data to be transmitted to the bottom electrode 150, so that the bottom electrode 150 is at a preset voltage value. Further, the charged particles in the capsule 130 are positioned at different positions according to a preset voltage value. That is, the driving circuit 40 is configured to selectively control the Data signal Data to be transmitted to the bottom electrode 150 according to the received Scan signal Scan, and control the bottom electrode 150 to be at different preset voltage values, so that the capsules 130 of the electronic paper 100 display different colors.

In the embodiment of the present application, the switch assembly 15 may be a thin film transistor (Thin Field Transistor, TFT), which is not particularly limited in the present application. At this time, the control terminal of the switch element 15 is a gate thereof, the first terminal of the switch element 15 is a drain thereof, and the second terminal of the switch element 15 is a source thereof, which is not particularly limited in the present application.

In the embodiment of the present application, the preset voltage value may be a value of-15 volts, 0 volts, 5 volts or 15 volts, and the preset voltage value is determined according to the color of the reflected light required by the capsule 130 correspondingly driven by the driving circuit 40. Specifically, when the reflected light required by the capsule 130 is the first color, the preset voltage value may be-15 volts; when the reflected light required by the capsule 130 is the second color, the preset voltage value may be 15 volts; when the reflected light beam required by the capsule 130 is the third color, the preset voltage value may be 5 volts, which is not particularly limited in the present application.

Referring to fig. 3 together, fig. 3 is a timing control diagram of a display driving circuit disclosed in the prior art. Electronic paper is a display device with a memory function, and a display driving circuit drives a display image to be roughly divided into 3 parts. As shown in fig. 3, the 3 parts are a trim part, an active part, and a display part, respectively. The preset voltage value corresponding to the second color of the light reflected by the charged particles in the capsule is the first voltage VSH, the preset voltage value corresponding to the first color of the light reflected by the charged particles in the capsule is the second voltage VSL, the light reflected by the charged particles in the capsule does not change, and the corresponding preset voltage value is the third voltage GND.

The first voltage VSH is greater than the second voltage VSL, and the third voltage GND is located between the first voltage VSH and the second voltage VSL, i.e., the first voltage VSH and the second voltage VSL are different in sign. Specifically, the first voltage VSH is greater than 0, the second voltage VSL is less than 0, or the first voltage VSH is less than 0, and the second voltage VSL is greater than 0.

In an embodiment of the present application, the third voltage GND may be 0 volt, or may be another value between the first voltage VSH and the second voltage VSL, which is not limited in the present application.

As shown in fig. 3, the display driving of the electronic paper needs to follow the Direct Current (DC) balance principle. Specifically, the result of signed addition of the number of positive and negative pulses applied to each bottom electrode 150 in frames is referred to as the driving effective time, and the DC balance principle is that the driving effective time is zero. The DC balance principle is defined because the capsule is irreversibly damaged by applying an electric field in one direction for a long time or accumulating an electric pulse in one direction for a long time. As shown in fig. 3, the setting of the drive waveform for the trim portion should balance the other 2 partial charge pulses to achieve DC balance.

As shown in fig. 3, to obtain a better display image, the active portion alternately applies driving for positive and negative pulses, and the display image is switched back and forth between the first color and the second color. As shown in fig. 3, in the display portion, different voltages are applied to the electrodes of different regions to display an image.

Referring to fig. 4 and fig. 5 together, fig. 4 is a part of the driving waveform table data disclosed in the embodiment of the application, and fig. 5 is another part of the driving waveform table data disclosed in the embodiment of the application.

In the embodiment of the present application, there is driving waveform table data corresponding to each of the colors (the first color, the second color, the third color, etc.) displayed last according to each of the capsules 130. The display driving circuit 200 outputs driving signals to the corresponding bottom electrode 150 according to the driving waveform table data. If the time and the corresponding data information included in the driving waveform table data are the same, that is, if the voltages included in the storage location and the data information included in the driving waveform table data are the same, it is indicated that the same voltage is applied to the first ends of the switch elements 15 of all the driving circuits 40 at the same time.

Fig. 4 and 5 are exemplary driving waveform table data for driving a display image, and memory addresses of plural sets of execution contents of different execution items are divided into 6 sets, respectively, a first set (Group 1) to a sixth set (Group 6) in order of execution (i.e., execution time sequence). The execution items are 5 in number, and the storage address of the Name corresponds to the first part (address (Hex)) of the storage address of the execution content. The execution content of each execution item is stored in the first Group (Group 1) to the sixth Group (Group 6) according to the execution sequence (namely, the execution time sequence), each Group comprises 7 data information, and the storage address of each data information corresponds to the second part of the storage address of the execution content. It is understood that, since the execution contents of each execution item are stored in the order of execution, the driving waveform table data contains timing information of the execution contents of different execution items.

As shown in the figure, the first column of the table indicates the Name (Name) of the item to be executed, LUTC indicates initial power-on, lutw indicates that the reflected light of the incident light beam incident on the capsule 130 is from the second color to the second color (i.e., the item is driven from the white pixel point to the white pixel point), LUTBW indicates that the reflected light of the incident light beam incident on the capsule 130 is from the first color to the second color (i.e., the item is driven from the black pixel point to the white pixel point), LUTWB indicates that the reflected light of the incident light beam incident on the capsule 130 is from the second color to the first color (i.e., the item is driven from the white pixel point to the black pixel point), and LUTWB indicates that the reflected light of the incident light beam incident on the capsule 130 is from the first color to the first color (i.e., the item is driven from the black pixel point to the black pixel point). The position in the table represents time, the data information represents the pressurizing size and the frame number (duration), if the position is consistent with the data information, the voltage sizes of the first end voltages of all the driving circuits at the time are the same, and the same color is displayed in a full screen mode.

The second column of the table represents a first part of the memory address of the execution content, examples of which are illustrated as 20, 21, 22, 23, 24. The rest of the table represents a second portion of the memory address of the execution content. Wherein the addresses are stored using hexadecimal numbers. For example, cell (4, 3), filled with cell representation of content 01: the execution item is lutvw, that is, the storage address of the execution content from the second color to the second color of the reflected light ray incident to the capsule 130 is P0121. The filler 01 is data information, and includes execution content of the execution item, specifically, a size of a data signal and a duration of outputting the size data signal. The unit of the duration may be a frame, which is not particularly limited in the present application.

In the embodiment of the present application, it can be understood that when the time of the driving waveform table data and the corresponding data information are the same, it is indicated that the data signals of the driving waveform table data transmitted to the corresponding driving circuit 40 at this time are the same. Further, if all data information of the driving waveform table data of the electronic paper 100 at the same time are the same, it is indicated that all the capsules 130 of the electronic paper 100 display the same color.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a structure of a display driving circuit 200 according to an embodiment of the application. In the embodiment of the application, the display driving circuit 200 includes a detection module 10, a storage module 20 and a control module 30 electrically connected to the detection module 10, and a driving circuit 40 electrically connected to the control module 30, wherein the storage module 20 is also electrically connected to the control module 30.

In the embodiment of the present application, the detection module 10 is configured to read the driving waveform table data pre-stored in the storage module 20, determine the time for executing the intermediate instruction according to the driving waveform table data, and set the auxiliary mark at the previous stage of the time of the driving waveform table data.

The control module 30 reads the driving waveform table data pre-stored in the storage module 20, and transmits the data signal and the scan signal to the driving circuit 40 according to the driving waveform table data. The control module 30 is also adapted to execute intermediate instructions when the auxiliary tag is read. Wherein, the intermediate command includes controlling the scan signal transmitted to the driving circuit 40 to be at the second potential and controlling the data signal transmitted to the driving circuit 40 to be 0.

In the embodiment of the present application, the second potential may be a low potential, and the first potential may be a high potential.

In the embodiment of the present application, the auxiliary flag may refer to modifying a flag bit default to 0 to 1.

In an embodiment of the present application, the driving waveform table data generated according to the final color presented by each capsule 130 may be stored in the storage module 20. That is, the memory module 20 includes data information and timing information for controlling the color of the light reflected by the capsule 130 by each driving circuit 40.

In the embodiment of the present application, the detection module 10 includes a data reading unit 12, a change table generating unit 14 electrically connected to the data reading unit 12, and a marking unit 16 electrically connected to the change table generating unit 14, where the data reading unit 12 and the marking unit 16 are also electrically connected to the storage module 20, respectively. Wherein the data reading unit 12 is configured to read the driving waveform table data stored in the storage module 20.

The change table generating unit 14 is configured to read the driving waveform table data, and form a picture display change table according to the driving waveform table data, where the picture display change table includes timing information characterizing color switching of each of the capsules 130. Specifically, the change table generating unit 14 reads the driving waveform table data, and if all the data information at the same time includes the same voltage value and the corresponding display color is the first color, the corresponding time is recorded as 01. If all the data information at the same time contains voltage values and the corresponding display color is the second color, correspondingly marking the moment as 10; the remaining time is denoted as 00, and a screen display change table is formed.

The marking unit 16 is configured to set an auxiliary mark for a previous stage of color switching in the driving waveform table data of the storage module 20 according to the picture display change table. Specifically, when the data of two adjacent times of the screen display change table is from 10 to 01 or 01 to 10, the auxiliary flag is set at the previous stage of 10 to 01 or 01 to 10. It can be understood that each voltage change stage is given a flag bit, the default of the flag bit is 0, the picture display change table is traversed, and if the change occurs from 10 to 01 or from 01 to 10, the flag position 1 of the previous stage of the change occurs. And when the voltage is output in each voltage change stage, a flag bit is read, if the flag bit is 1, a special mode is executed, wherein the special mode is that all grid electrodes are opened, the voltages of the first ends of all switch assemblies 15 are switched to GND, and the duration of the special mode can be customized.

The control module 30 reads the driving waveform table data pre-stored in the storage module 20 and executes the intermediate command when the auxiliary mark is read. Wherein, the intermediate command includes controlling the scan signal transmitted to the driving circuit 40 to be at the second potential and controlling the data signal transmitted to the driving circuit 40 to be 0.

In an embodiment of the present application, the data and timing information of the intermediate instruction may be stored in the memory module 20.

In the embodiment of the present application, the scan signal controls the switch assembly 15 to be in the closed or open state. Specifically, when the scan signal is at the first potential, the scan signal controls the switch assembly 15 to be in an off state, i.e., the first end and the second end of the switch assembly 15 are electrically disconnected, and the data signal cannot be transmitted to the bottom electrode 150. When the scan signal is at the second potential, the scan signal controls the switch assembly 15 to be in a closed state, i.e. the first and second ends of the switch assembly 15 are electrically conductive, and the data signal is transmitted to the bottom electrode 150.

In the embodiment of the present application, by providing the detection module 10, the detection module 10 detects the switching time for driving the capsule 130 to display different colors, and in the previous stage of switching, the driving circuit 40 is controlled to be in an on state and transmits a data signal with a specific voltage value to the driving circuit 40. So that the degree of change in the switching voltage of the bottom electrode 150 at which different colors are displayed is reduced.

In an embodiment of the present application, the specific voltage value may be 0 volt. It can be understood that the specific voltage value may also be a voltage value between two preset voltage values corresponding to the reflective color switching of the capsule 130 to be controlled, where the specific value of the specific voltage value may be determined according to specific situations.

For example, the reflected light required by the capsule 130 at the previous moment is the first color, and the corresponding preset voltage value may be-15 volts; when the reflected light required by the capsule 130 is the second color at the next moment, the corresponding preset voltage value may be 15 volts. At this time, the specific voltage value may be a voltage value between-15 volts and 15 volts as the specific voltage value. At this time, the color of the display of the capsule 130 is directly switched from-15 volts to 15 volts by the driving signal from the first color to the second color. In the present application, the voltage of 15 volts or-15 volts applied to the bottom electrode 150 is released by a special mode, and then switched to-15 volts or 15 volts accordingly. Therefore, the voltage change of different color switching is regulated from 30 volts to 15 volts, so that the voltage change is reduced, and the power consumption caused by the voltage change during color switching is effectively reduced. Similarly, controlling the driving circuit 40 to be in an on state and transmitting data signals of other specific voltage values to the driving circuit 40 has similar technical effects. The technical effect of transmitting data signals of different specific voltage values differs only in the degree of power consumption by reducing the voltage variation at the time of color switching.

In the embodiment of the present application, taking the specific voltage value of 0 volt, the resolution of 128×296 and the refresh frequency of 50 hertz (Hz) as an example, the charging rate of the switch component 15 is generally designed to be above 95%, so that 1/50/296=67 microseconds (μs) can switch the data signal to 0 volt. In this way, only 6700 microseconds (μs) is needed for executing the intermediate command for 100 times of color change, and 67 microseconds for executing the intermediate command is negligible for a refresh time of 20 seconds to 30 seconds of the electronic paper 100.

Based on the same concept, the embodiment of the application also discloses an electronic paper 100, and the electronic paper 100 comprises the display driving circuit 200.

Based on the same concept, the present application also provides a refresh driving method for the electronic paper 100. Referring to fig. 7, fig. 7 is a flow chart of a refresh driving method according to an embodiment of the application. The refresh driving method may include at least the following steps.

Step S10, the data reading unit 12 reads the driving waveform table data stored in the storage module 20.

In an embodiment of the present application, the driving waveform table data includes timing and data information for driving different preset voltage values applied to the bottom electrode 150.

In the embodiment of the present application, there is respective corresponding driving waveform table data according to the colors (first color, second color, third color, etc.) that each capsule 130 finally displays.

Step S20, the change table generating unit 14 forms a screen display change table from the driving waveform table data.

In the embodiment of the present application, the change table generating unit 14 forms a picture display change table containing timing information characterizing the switching of different colors of each capsule 130 according to the driving waveform table data. Specifically, the change table generating unit 14 reads the driving waveform table data, and if all the data information at the same time includes the same voltage value and the corresponding display color is the first color, the corresponding time is recorded as 01. If all the data information at the same time contain the same voltage value and the corresponding display color is the second color, the corresponding time is marked as 10. The remaining time is denoted by 00, and a screen display change table is formed.

Step S30, setting an auxiliary mark for the previous stage of switching different colors in the driving waveform table data of the storage module 20 according to the picture display change table by the marking unit 16.

In the embodiment of the present application, when the data of the screen display change table is from 10 to 01 or from 01 to 10, the auxiliary flag is set at the previous stage of 10 to 01 and 01 to 10.

Step S40, the control module 30 reads the driving waveform table data of the storage module 20 and executes the intermediate instruction when the auxiliary mark is read.

In the embodiment of the present application, the intermediate command includes controlling the scan signal transmitted to the driving circuit 40 to be at the second potential and controlling the data signal transmitted to the driving circuit 40 to be at the specific voltage value.

In an embodiment of the present application, the specific voltage value may be 0 volt. It is understood that a voltage value between two preset voltage values corresponding to the reflective color switching of the capsule 130 to be controlled may also be used. The specific value of the specific voltage value can be determined according to specific situations. For example, the reflected light required by the capsule 130 at the previous moment is the first color, and the corresponding preset voltage value may be-15 volts; when the reflected light required by the capsule 130 is the second color at the next moment, the corresponding preset voltage value may be 15 volts. At this time, a voltage value of-15 volts to 15 volts may be used as the specific voltage value.

In summary, in the display driving circuit 200, the electronic paper 100 and the refresh driving method of the present application, the detection module 10 is disposed in the display driving circuit 200, and the memory module 20 and the control module 30 cooperate to adjust the switch assembly 15 of the driving circuit 40 to be in an open state and transmit the data signal with a specific voltage value to the driving circuit 40 in the previous stage of the reflective color switching of the capsule 130. The degree of voltage change of the bottom electrode 150 at the time of switching of the reflective color of the capsule 130 is reduced, thereby effectively reducing power consumption caused by the voltage change at the time of switching of the color. Meanwhile, the time for executing the intermediate instruction is extremely short, so that the refreshing frequency of the electronic paper is not influenced.

The flow chart described in the present application is merely one embodiment, and many modifications may be made to this illustration or the steps in the present application without departing from the spirit of the application. For example, the steps may be performed in a differing order, or steps may be added, deleted or modified. Those skilled in the art will recognize that the application can be practiced with modification within the spirit and scope of the appended claims.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. All possible combinations of the technical features in the above embodiments are described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. The display driving circuit is used for electronic paper and comprises a storage module, a control module electrically connected with the storage module and a driving circuit electrically connected with the control module, and is characterized by further comprising a detection module, wherein the detection module is electrically connected with the storage module and is used for reading driving waveform table data prestored in the storage module, determining the time for executing an intermediate instruction according to the driving waveform table data and setting an auxiliary mark in the previous stage of the time; the detection module comprises a data reading unit, a change table generating unit electrically connected with the data reading unit and a marking unit electrically connected with the change table generating unit, wherein the data reading unit and the marking unit are also electrically connected with the storage module respectively, the data reading unit is used for reading the driving waveform table data, the change table generating unit is used for reading the driving waveform table data and forming a picture display change table according to the driving waveform table data, the picture display change table comprises time sequence information for representing color switching of a capsule of the electronic paper, the marking unit is used for setting the auxiliary mark according to the picture display change table on the previous stage of color switching in the driving waveform table data, when the data of two adjacent moments of the picture display change table are from 10 to 01 or 01 to 10, the auxiliary mark is set on the previous stage of 10 to 01 or 01 to 10, if the data information of the driving waveform table data at the same time are the same and the corresponding display color is the first color, the time is the 01, and the driving waveform table data at the same time is the same and the corresponding time is the corresponding to the driving waveform table data at the same time, and the time is the corresponding to 10; the rest time is correspondingly recorded as 00 so as to form the picture display change table;

The control module is used for executing the intermediate instruction when the auxiliary mark is read, wherein the intermediate instruction comprises a scanning signal which controls the control module to output a second potential and a data signal which outputs a specific voltage value to the driving circuit, and the specific voltage value is a voltage value between a front preset voltage value and a rear preset voltage value which correspond to the reflection color switching of the capsule to be controlled;

the driving circuit is used for driving the bottom electrode of the electronic paper to be at a preset voltage value, and comprises a switch component, when the scanning signal is at a second potential, the scanning signal controls the switch component to be in a closed state, and the data signal is transmitted to the bottom electrode.

2. The display driver circuit according to claim 1, further comprising a plurality of scanning lines extending in a first direction and a plurality of data lines extending in a second direction, each of intersections of the scanning lines and the data lines being provided with the driver circuit, the plurality of scanning lines extending in a first direction and the plurality of data lines being arranged in a grid-like pattern, wherein the first direction and the second direction are perpendicular to each other;

the control end of each switch assembly is used for receiving the scanning signals from the corresponding scanning line, the first end of each switch assembly is used for receiving the data signals from the corresponding data line, and the second end of each switch assembly is electrically connected to the corresponding bottom electrode.

3. The display driving circuit according to claim 2, wherein the driving circuit is configured to selectively control the data signal to be transmitted to the bottom electrode according to the received scan signal, and control the bottom electrode to be at a different preset voltage value;

when the scanning signal is at a first potential, the scanning signal controls the switch assembly to be in an off state; when the scanning signal is at a second potential, the scanning signal controls the switch assembly to be in a closed state, and the data signal is transmitted to the bottom electrode.

4. An electronic paper, characterized in that the electronic paper comprises the display driving circuit according to any one of claims 1 to 3.

5. The electronic paper of claim 4, wherein the electronic paper comprises a common electrode layer, a plurality of capsules, a supporting layer and a plurality of bottom electrodes, wherein the bottom electrodes are arranged on one side surface of the supporting layer, the distance between the common electrode layer and the bottom electrodes is preset, the plurality of capsules are arranged between the common electrode layer and the bottom electrodes, a plurality of charged particles and transparent dispersion media are distributed in the capsules, and the transparent dispersion media are used for suspending the charged particles inside the capsules.

6. The electronic paper of claim 5, wherein the predetermined voltage value corresponding to the first color is a first voltage, the predetermined voltage value corresponding to the second color is a second voltage, and the first voltage and the second voltage are different numbers.

7. The electronic paper according to claim 5 or 6, further comprising a protective layer disposed on a surface of the common electrode layer opposite to the bottom electrode.

8. A refresh driving method applied to the electronic paper according to any one of claims 4 to 7, characterized in that the refresh driving method comprises: